diff --git a/target/linux/ramips/mt7621/config-5.4 b/target/linux/ramips/mt7621/config-5.4
new file mode 100644
index 00000000000..4112cad7809
--- /dev/null
+++ b/target/linux/ramips/mt7621/config-5.4
@@ -0,0 +1,315 @@
+CONFIG_ARCH_BINFMT_ELF_STATE=y
+CONFIG_ARCH_CLOCKSOURCE_DATA=y
+CONFIG_ARCH_DISCARD_MEMBLOCK=y
+CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
+# CONFIG_ARCH_HAS_GCOV_PROFILE_ALL is not set
+CONFIG_ARCH_HAS_RESET_CONTROLLER=y
+# CONFIG_ARCH_HAS_SG_CHAIN is not set
+# CONFIG_ARCH_HAS_STRICT_KERNEL_RWX is not set
+# CONFIG_ARCH_HAS_STRICT_MODULE_RWX is not set
+CONFIG_ARCH_HAS_TICK_BROADCAST=y
+CONFIG_ARCH_HIBERNATION_POSSIBLE=y
+CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
+CONFIG_ARCH_MIGHT_HAVE_PC_SERIO=y
+CONFIG_ARCH_MMAP_RND_BITS_MAX=15
+CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MAX=15
+# CONFIG_ARCH_OPTIONAL_KERNEL_RWX is not set
+# CONFIG_ARCH_OPTIONAL_KERNEL_RWX_DEFAULT is not set
+CONFIG_ARCH_SUPPORTS_UPROBES=y
+CONFIG_ARCH_SUSPEND_POSSIBLE=y
+CONFIG_ARCH_USE_BUILTIN_BSWAP=y
+CONFIG_ARCH_USE_QUEUED_RWLOCKS=y
+CONFIG_ARCH_USE_QUEUED_SPINLOCKS=y
+CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
+CONFIG_BLK_MQ_PCI=y
+CONFIG_BOARD_SCACHE=y
+CONFIG_BOUNCE=y
+CONFIG_CEVT_R4K=y
+# CONFIG_CEVT_SYSTICK_QUIRK is not set
+CONFIG_CLKDEV_LOOKUP=y
+CONFIG_CLKSRC_MIPS_GIC=y
+CONFIG_CLONE_BACKWARDS=y
+CONFIG_CMDLINE="rootfstype=squashfs,jffs2"
+CONFIG_CMDLINE_BOOL=y
+# CONFIG_CMDLINE_OVERRIDE is not set
+CONFIG_COMMON_CLK=y
+# CONFIG_COMMON_CLK_BOSTON is not set
+CONFIG_CPU_GENERIC_DUMP_TLB=y
+CONFIG_CPU_HAS_PREFETCH=y
+CONFIG_CPU_HAS_RIXI=y
+CONFIG_CPU_HAS_SYNC=y
+CONFIG_CPU_LITTLE_ENDIAN=y
+CONFIG_CPU_MIPS32=y
+# CONFIG_CPU_MIPS32_R1 is not set
+CONFIG_CPU_MIPS32_R2=y
+CONFIG_CPU_MIPSR2=y
+CONFIG_CPU_MIPSR2_IRQ_EI=y
+CONFIG_CPU_MIPSR2_IRQ_VI=y
+CONFIG_CPU_NEEDS_NO_SMARTMIPS_OR_MICROMIPS=y
+CONFIG_CPU_R4K_CACHE_TLB=y
+CONFIG_CPU_R4K_FPU=y
+CONFIG_CPU_RMAP=y
+CONFIG_CPU_SUPPORTS_32BIT_KERNEL=y
+CONFIG_CPU_SUPPORTS_HIGHMEM=y
+CONFIG_CPU_SUPPORTS_MSA=y
+CONFIG_CRC16=y
+CONFIG_CRYPTO_ACOMP2=y
+CONFIG_CRYPTO_AEAD=y
+CONFIG_CRYPTO_AEAD2=y
+CONFIG_CRYPTO_DEFLATE=y
+CONFIG_CRYPTO_HASH2=y
+CONFIG_CRYPTO_LZO=y
+CONFIG_CRYPTO_MANAGER=y
+CONFIG_CRYPTO_MANAGER2=y
+CONFIG_CRYPTO_NULL2=y
+CONFIG_CRYPTO_RNG2=y
+CONFIG_CRYPTO_WORKQUEUE=y
+CONFIG_CSRC_R4K=y
+CONFIG_DEBUG_PINCTRL=y
+CONFIG_DMA_NONCOHERENT=y
+CONFIG_DTB_RT_NONE=y
+CONFIG_DTC=y
+CONFIG_EARLY_PRINTK=y
+CONFIG_FIXED_PHY=y
+CONFIG_GENERIC_ATOMIC64=y
+CONFIG_GENERIC_CLOCKEVENTS=y
+CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
+CONFIG_GENERIC_CMOS_UPDATE=y
+CONFIG_GENERIC_CPU_AUTOPROBE=y
+CONFIG_GENERIC_IO=y
+CONFIG_GENERIC_IRQ_CHIP=y
+CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK=y
+CONFIG_GENERIC_IRQ_IPI=y
+CONFIG_GENERIC_IRQ_SHOW=y
+CONFIG_GENERIC_PCI_IOMAP=y
+CONFIG_GENERIC_SCHED_CLOCK=y
+CONFIG_GENERIC_SMP_IDLE_THREAD=y
+CONFIG_GENERIC_TIME_VSYSCALL=y
+CONFIG_GPIOLIB=y
+CONFIG_GPIO_MT7621=y
+# CONFIG_GPIO_RALINK is not set
+CONFIG_GPIO_SYSFS=y
+CONFIG_GPIO_WATCHDOG=y
+# CONFIG_GPIO_WATCHDOG_ARCH_INITCALL is not set
+# CONFIG_GRO_CELLS is not set
+CONFIG_HANDLE_DOMAIN_IRQ=y
+CONFIG_HARDWARE_WATCHPOINTS=y
+CONFIG_HAS_DMA=y
+CONFIG_HAS_IOMEM=y
+CONFIG_HAS_IOPORT_MAP=y
+# CONFIG_HAVE_64BIT_ALIGNED_ACCESS is not set
+# CONFIG_HAVE_ARCH_BITREVERSE is not set
+CONFIG_HAVE_ARCH_COMPILER_H=y
+CONFIG_HAVE_ARCH_JUMP_LABEL=y
+CONFIG_HAVE_ARCH_KGDB=y
+CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
+CONFIG_HAVE_ARCH_TRACEHOOK=y
+# CONFIG_HAVE_BOOTMEM_INFO_NODE is not set
+CONFIG_HAVE_CBPF_JIT=y
+CONFIG_HAVE_CC_STACKPROTECTOR=y
+CONFIG_HAVE_CLK=y
+CONFIG_HAVE_CLK_PREPARE=y
+CONFIG_HAVE_CONTEXT_TRACKING=y
+CONFIG_HAVE_COPY_THREAD_TLS=y
+CONFIG_HAVE_C_RECORDMCOUNT=y
+CONFIG_HAVE_DEBUG_KMEMLEAK=y
+CONFIG_HAVE_DEBUG_STACKOVERFLOW=y
+CONFIG_HAVE_DMA_API_DEBUG=y
+CONFIG_HAVE_DMA_CONTIGUOUS=y
+CONFIG_HAVE_DYNAMIC_FTRACE=y
+CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
+CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
+CONFIG_HAVE_FUNCTION_TRACER=y
+CONFIG_HAVE_GENERIC_DMA_COHERENT=y
+CONFIG_HAVE_IDE=y
+CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y
+CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
+CONFIG_HAVE_KVM=y
+CONFIG_HAVE_LATENCYTOP_SUPPORT=y
+CONFIG_HAVE_MEMBLOCK=y
+CONFIG_HAVE_MEMBLOCK_NODE_MAP=y
+CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
+CONFIG_HAVE_NET_DSA=y
+CONFIG_HAVE_OPROFILE=y
+CONFIG_HAVE_PERF_EVENTS=y
+CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
+CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
+CONFIG_HIGHMEM=y
+CONFIG_HW_HAS_PCI=y
+CONFIG_HZ_PERIODIC=y
+CONFIG_I2C=y
+CONFIG_I2C_BOARDINFO=y
+CONFIG_I2C_MT7621=y
+CONFIG_INITRAMFS_SOURCE=""
+CONFIG_IRQCHIP=y
+CONFIG_IRQ_DOMAIN=y
+CONFIG_IRQ_DOMAIN_HIERARCHY=y
+CONFIG_IRQ_FORCED_THREADING=y
+CONFIG_IRQ_MIPS_CPU=y
+CONFIG_IRQ_WORK=y
+CONFIG_LIBFDT=y
+CONFIG_LZO_COMPRESS=y
+CONFIG_LZO_DECOMPRESS=y
+CONFIG_MDIO_BUS=y
+CONFIG_MDIO_DEVICE=y
+CONFIG_MIGRATION=y
+CONFIG_MIPS=y
+CONFIG_MIPS_ASID_BITS=8
+CONFIG_MIPS_ASID_SHIFT=0
+CONFIG_MIPS_CBPF_JIT=y
+CONFIG_MIPS_CLOCK_VSYSCALL=y
+CONFIG_MIPS_CM=y
+# CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND is not set
+# CONFIG_MIPS_CMDLINE_DTB_EXTEND is not set
+# CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER is not set
+CONFIG_MIPS_CMDLINE_FROM_DTB=y
+CONFIG_MIPS_CPC=y
+CONFIG_MIPS_CPS=y
+# CONFIG_MIPS_CPS_NS16550 is not set
+CONFIG_MIPS_CPU_SCACHE=y
+# CONFIG_MIPS_ELF_APPENDED_DTB is not set
+CONFIG_MIPS_GIC=y
+# CONFIG_MIPS_HUGE_TLB_SUPPORT is not set
+CONFIG_MIPS_L1_CACHE_SHIFT=5
+# CONFIG_MIPS_MACHINE is not set
+CONFIG_MIPS_MT=y
+CONFIG_MIPS_MT_FPAFF=y
+CONFIG_MIPS_MT_SMP=y
+# CONFIG_MIPS_NO_APPENDED_DTB is not set
+CONFIG_MIPS_PERF_SHARED_TC_COUNTERS=y
+CONFIG_MIPS_RAW_APPENDED_DTB=y
+CONFIG_MIPS_SPRAM=y
+# CONFIG_MIPS_VPE_LOADER is not set
+CONFIG_MODULES_USE_ELF_REL=y
+CONFIG_MT7621_WDT=y
+# CONFIG_MTD_CFI_INTELEXT is not set
+CONFIG_MTD_CMDLINE_PARTS=y
+CONFIG_MTD_M25P80=y
+CONFIG_MTD_NAND=y
+CONFIG_MTD_NAND_ECC=y
+CONFIG_MTD_PHYSMAP=y
+CONFIG_MTD_SPI_NOR=y
+CONFIG_MTD_SPLIT_MINOR_FW=y
+CONFIG_MTD_SPLIT_SEAMA_FW=y
+CONFIG_MTD_SPLIT_TPLINK_FW=y
+CONFIG_MTD_SPLIT_TRX_FW=y
+CONFIG_MTD_SPLIT_UIMAGE_FW=y
+CONFIG_MTD_UBI=y
+CONFIG_MTD_UBI_BEB_LIMIT=20
+CONFIG_MTD_UBI_BLOCK=y
+# CONFIG_MTD_UBI_FASTMAP is not set
+# CONFIG_MTD_UBI_GLUEBI is not set
+CONFIG_MTD_UBI_WL_THRESHOLD=4096
+CONFIG_MTK_MTD_NAND=y
+CONFIG_NEED_DMA_MAP_STATE=y
+CONFIG_NET_FLOW_LIMIT=y
+CONFIG_NET_MEDIATEK_GSW_MT7621=y
+CONFIG_NET_MEDIATEK_MDIO=y
+CONFIG_NET_MEDIATEK_MDIO_MT7620=y
+CONFIG_NET_MEDIATEK_MT7621=y
+CONFIG_NET_MEDIATEK_OFFLOAD=y
+CONFIG_NET_MEDIATEK_SOC=y
+CONFIG_NET_VENDOR_MEDIATEK=y
+CONFIG_NO_GENERIC_PCI_IOPORT_MAP=y
+# CONFIG_NO_IOPORT_MAP is not set
+CONFIG_NR_CPUS=4
+CONFIG_OF=y
+CONFIG_OF_ADDRESS=y
+CONFIG_OF_ADDRESS_PCI=y
+CONFIG_OF_EARLY_FLATTREE=y
+CONFIG_OF_FLATTREE=y
+CONFIG_OF_GPIO=y
+CONFIG_OF_IRQ=y
+CONFIG_OF_MDIO=y
+CONFIG_OF_NET=y
+CONFIG_OF_PCI=y
+CONFIG_OF_PCI_IRQ=y
+CONFIG_PADATA=y
+CONFIG_PCI=y
+CONFIG_PCI_DISABLE_COMMON_QUIRKS=y
+CONFIG_PCI_DOMAINS=y
+CONFIG_PCI_DRIVERS_LEGACY=y
+CONFIG_PERF_USE_VMALLOC=y
+CONFIG_PGTABLE_LEVELS=2
+CONFIG_PHYLIB=y
+# CONFIG_PHY_RALINK_USB is not set
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_RT2880=y
+# CONFIG_PINCTRL_SINGLE is not set
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_GPIO=y
+CONFIG_POWER_SUPPLY=y
+CONFIG_QUEUED_RWLOCKS=y
+CONFIG_QUEUED_SPINLOCKS=y
+CONFIG_RALINK=y
+# CONFIG_RALINK_WDT is not set
+CONFIG_RATIONAL=y
+CONFIG_RCU_NEED_SEGCBLIST=y
+CONFIG_RCU_STALL_COMMON=y
+CONFIG_REGMAP=y
+CONFIG_REGMAP_I2C=y
+CONFIG_REGMAP_SPI=y
+CONFIG_REGULATOR=y
+CONFIG_REGULATOR_FIXED_VOLTAGE=y
+CONFIG_RESET_CONTROLLER=y
+CONFIG_RFS_ACCEL=y
+CONFIG_RPS=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_BQ32K=y
+CONFIG_RTC_DRV_PCF8563=y
+CONFIG_RTC_I2C_AND_SPI=y
+CONFIG_RTC_MC146818_LIB=y
+# CONFIG_SCHED_INFO is not set
+CONFIG_SCHED_SMT=y
+# CONFIG_SCSI_DMA is not set
+# CONFIG_SERIAL_8250_FSL is not set
+CONFIG_SERIAL_8250_NR_UARTS=3
+CONFIG_SERIAL_8250_RUNTIME_UARTS=3
+CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_SMP=y
+CONFIG_SMP_UP=y
+# CONFIG_SOC_MT7620 is not set
+CONFIG_SOC_MT7621=y
+# CONFIG_SOC_RT288X is not set
+# CONFIG_SOC_RT305X is not set
+# CONFIG_SOC_RT3883 is not set
+CONFIG_SPI=y
+CONFIG_SPI_MASTER=y
+CONFIG_SPI_MT7621=y
+# CONFIG_SPI_RT2880 is not set
+CONFIG_SRCU=y
+CONFIG_SWCONFIG=y
+CONFIG_SWCONFIG_LEDS=y
+CONFIG_SWPHY=y
+CONFIG_SYNC_R4K=y
+CONFIG_SYSCTL_EXCEPTION_TRACE=y
+CONFIG_SYS_HAS_CPU_MIPS32_R1=y
+CONFIG_SYS_HAS_CPU_MIPS32_R2=y
+CONFIG_SYS_HAS_EARLY_PRINTK=y
+CONFIG_SYS_SUPPORTS_32BIT_KERNEL=y
+CONFIG_SYS_SUPPORTS_ARBIT_HZ=y
+CONFIG_SYS_SUPPORTS_HIGHMEM=y
+CONFIG_SYS_SUPPORTS_HOTPLUG_CPU=y
+CONFIG_SYS_SUPPORTS_LITTLE_ENDIAN=y
+CONFIG_SYS_SUPPORTS_MIPS16=y
+CONFIG_SYS_SUPPORTS_MIPS_CPS=y
+CONFIG_SYS_SUPPORTS_MULTITHREADING=y
+CONFIG_SYS_SUPPORTS_SCHED_SMT=y
+CONFIG_SYS_SUPPORTS_SMP=y
+CONFIG_TICK_CPU_ACCOUNTING=y
+CONFIG_TIMER_OF=y
+CONFIG_TIMER_PROBE=y
+CONFIG_TREE_RCU=y
+CONFIG_TREE_SRCU=y
+CONFIG_UBIFS_FS=y
+CONFIG_UBIFS_FS_ADVANCED_COMPR=y
+CONFIG_UBIFS_FS_LZO=y
+CONFIG_UBIFS_FS_ZLIB=y
+CONFIG_USB_SUPPORT=y
+CONFIG_USE_OF=y
+CONFIG_WATCHDOG_CORE=y
+CONFIG_WEAK_ORDERING=y
+CONFIG_WEAK_REORDERING_BEYOND_LLSC=y
+CONFIG_XPS=y
+CONFIG_ZLIB_DEFLATE=y
+CONFIG_ZLIB_INFLATE=y
diff --git a/target/linux/ramips/patches-5.4/0001-MIPS-ralink-Add-rt3352-SPI_CS1-pinmux.patch b/target/linux/ramips/patches-5.4/0001-MIPS-ralink-Add-rt3352-SPI_CS1-pinmux.patch
new file mode 100644
index 00000000000..4f803dfd0d8
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0001-MIPS-ralink-Add-rt3352-SPI_CS1-pinmux.patch
@@ -0,0 +1,45 @@
+From 35d017947401d9f449a7e55e52506744e0c62577 Mon Sep 17 00:00:00 2001
+From: Mathias Kresin <dev@kresin.me>
+Date: Wed, 22 Aug 2018 22:38:06 +0200
+Subject: [PATCH] MIPS: ralink: Add rt3352 SPI_CS1 pinmux
+
+The rt3352 has a pin that can be used as second spi chip select,
+watchdog reset or GPIO. The pinmux setup was missing the definition of
+said pin.
+
+The pin is configured via the same bit on rt5350, so reuse the existing
+macro.
+
+Signed-off-by: Mathias Kresin <dev@kresin.me>
+Signed-off-by: Paul Burton <paul.burton@mips.com>
+Patchwork: https://patchwork.linux-mips.org/patch/20301/
+Cc: John Crispin <john@phrozen.org>
+Cc: Ralf Baechle <ralf@linux-mips.org>
+Cc: James Hogan <jhogan@kernel.org>
+Cc: linux-mips@linux-mips.org
+Cc: linux-kernel@vger.kernel.org
+---
+ arch/mips/ralink/rt305x.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+--- a/arch/mips/ralink/rt305x.c
++++ b/arch/mips/ralink/rt305x.c
+@@ -49,6 +49,10 @@ static struct rt2880_pmx_func rgmii_func
+ static struct rt2880_pmx_func rt3352_lna_func[] = { FUNC("lna", 0, 36, 2) };
+ static struct rt2880_pmx_func rt3352_pa_func[] = { FUNC("pa", 0, 38, 2) };
+ static struct rt2880_pmx_func rt3352_led_func[] = { FUNC("led", 0, 40, 5) };
++static struct rt2880_pmx_func rt3352_cs1_func[] = {
++ FUNC("spi_cs1", 0, 45, 1),
++ FUNC("wdg_cs1", 1, 45, 1),
++};
+
+ static struct rt2880_pmx_group rt3050_pinmux_data[] = {
+ GRP("i2c", i2c_func, 1, RT305X_GPIO_MODE_I2C),
+@@ -75,6 +79,7 @@ static struct rt2880_pmx_group rt3352_pi
+ GRP("lna", rt3352_lna_func, 1, RT3352_GPIO_MODE_LNA),
+ GRP("pa", rt3352_pa_func, 1, RT3352_GPIO_MODE_PA),
+ GRP("led", rt3352_led_func, 1, RT5350_GPIO_MODE_PHY_LED),
++ GRP("spi_cs1", rt3352_cs1_func, 2, RT5350_GPIO_MODE_SPI_CS1),
+ { 0 }
+ };
+
diff --git a/target/linux/ramips/patches-5.4/0002-MIPS-pci-rt2880-set-pci-controller-of_node.patch b/target/linux/ramips/patches-5.4/0002-MIPS-pci-rt2880-set-pci-controller-of_node.patch
new file mode 100644
index 00000000000..7ac092cfb01
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0002-MIPS-pci-rt2880-set-pci-controller-of_node.patch
@@ -0,0 +1,32 @@
+From 0eb1cfffd5433d8dce3e4163a5cd9accc6000856 Mon Sep 17 00:00:00 2001
+From: Tobias Wolf <dev-NTEO@vplace.de>
+Date: Wed, 5 Sep 2018 08:51:26 +0200
+Subject: [PATCH] MIPS: pci-rt2880: set pci controller of_node
+
+Set the PCI controller of_node such that PCI devices can be
+instantiated via device tree.
+
+Signed-off-by: Tobias Wolf <dev-NTEO@vplace.de>
+Signed-off-by: Mathias Kresin <dev@kresin.me>
+Acked-by: John Crispin <john@phrozen.org>
+Signed-off-by: Paul Burton <paul.burton@mips.com>
+Patchwork: https://patchwork.linux-mips.org/patch/20423/
+Cc: Ralf Baechle <ralf@linux-mips.org>
+Cc: James Hogan <jhogan@kernel.org>
+Cc: linux-mips@linux-mips.org
+Cc: linux-kernel@vger.kernel.org
+---
+ arch/mips/pci/pci-rt2880.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/arch/mips/pci/pci-rt2880.c
++++ b/arch/mips/pci/pci-rt2880.c
+@@ -246,6 +246,8 @@ static int rt288x_pci_probe(struct platf
+ rt2880_pci_write_u32(PCI_BASE_ADDRESS_0, 0x08000000);
+ (void) rt2880_pci_read_u32(PCI_BASE_ADDRESS_0);
+
++ rt2880_pci_controller.of_node = pdev->dev.of_node;
++
+ register_pci_controller(&rt2880_pci_controller);
+ return 0;
+ }
diff --git a/target/linux/ramips/patches-5.4/0003-MIPS-Fix-memory-reservation-in-bootmem_init-for-cert.patch b/target/linux/ramips/patches-5.4/0003-MIPS-Fix-memory-reservation-in-bootmem_init-for-cert.patch
new file mode 100644
index 00000000000..77f2622b9d2
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0003-MIPS-Fix-memory-reservation-in-bootmem_init-for-cert.patch
@@ -0,0 +1,45 @@
+From: Tobias Wolf <dev-NTEO@vplace.de>
+Subject: [v2] MIPS: Fix memory reservation in bootmem_init for certain non-usermem setups
+
+Commit 67a3ba25aa95 ("MIPS: Fix incorrect mem=X@Y handling") introduced a new
+issue for rt288x where "PHYS_OFFSET" is 0x0 but the calculated "ramstart" is
+not. As the prerequisite of custom memory map has been removed, this results
+in the full memory range of 0x0 - 0x8000000 to be marked as reserved for this
+platform.
+
+v2: Correctly compare that usermem is not null.
+
+This patch adds the originally intended prerequisite again.
+
+Signed-off-by: Tobias Wolf <dev-NTEO@vplace.de>
+---
+
+--- a/arch/mips/kernel/setup.c
++++ b/arch/mips/kernel/setup.c
+@@ -369,6 +369,8 @@ static unsigned long __init bootmap_byte
+ return ALIGN(bytes, sizeof(long));
+ }
+
++static int usermem __initdata;
++
+ static void __init bootmem_init(void)
+ {
+ unsigned long reserved_end;
+@@ -442,7 +444,7 @@ static void __init bootmem_init(void)
+ /*
+ * Reserve any memory between the start of RAM and PHYS_OFFSET
+ */
+- if (ramstart > PHYS_OFFSET)
++ if (usermem && ramstart > PHYS_OFFSET)
+ add_memory_region(PHYS_OFFSET, ramstart - PHYS_OFFSET,
+ BOOT_MEM_RESERVED);
+
+@@ -652,8 +654,6 @@ static void __init bootmem_init(void)
+ * initialization hook for anything else was introduced.
+ */
+
+-static int usermem __initdata;
+-
+ static int __init early_parse_mem(char *p)
+ {
+ phys_addr_t start, size;
diff --git a/target/linux/ramips/patches-5.4/0004-MIPS-ralink-add-MT7621-pcie-driver.patch b/target/linux/ramips/patches-5.4/0004-MIPS-ralink-add-MT7621-pcie-driver.patch
new file mode 100644
index 00000000000..b6f1ce93f4f
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0004-MIPS-ralink-add-MT7621-pcie-driver.patch
@@ -0,0 +1,861 @@
+From fec11d4e8dc5cc79bcd7c8fd55038ac21ac39965 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 16 Mar 2014 05:22:39 +0000
+Subject: [PATCH 04/53] MIPS: ralink: add MT7621 pcie driver
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/pci/Makefile | 1 +
+ arch/mips/pci/pci-mt7621.c | 813 ++++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 814 insertions(+)
+ create mode 100644 arch/mips/pci/pci-mt7621.c
+
+--- a/arch/mips/pci/Makefile
++++ b/arch/mips/pci/Makefile
+@@ -47,6 +47,7 @@ obj-$(CONFIG_SNI_RM) += fixup-sni.o ops
+ obj-$(CONFIG_LANTIQ) += fixup-lantiq.o
+ obj-$(CONFIG_PCI_LANTIQ) += pci-lantiq.o ops-lantiq.o
+ obj-$(CONFIG_SOC_MT7620) += pci-mt7620.o
++obj-$(CONFIG_SOC_MT7621) += pci-mt7621.o
+ obj-$(CONFIG_SOC_RT288X) += pci-rt2880.o
+ obj-$(CONFIG_SOC_RT3883) += pci-rt3883.o
+ obj-$(CONFIG_TANBAC_TB0219) += fixup-tb0219.o
+--- /dev/null
++++ b/arch/mips/pci/pci-mt7621.c
+@@ -0,0 +1,836 @@
++/**************************************************************************
++ *
++ * BRIEF MODULE DESCRIPTION
++ * PCI init for Ralink RT2880 solution
++ *
++ * Copyright 2007 Ralink Inc. (bruce_chang@ralinktech.com.tw)
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License as published by the
++ * Free Software Foundation; either version 2 of the License, or (at your
++ * option) any later version.
++ *
++ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
++ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
++ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
++ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
++ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
++ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
++ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
++ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
++ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ * You should have received a copy of the GNU General Public License along
++ * with this program; if not, write to the Free Software Foundation, Inc.,
++ * 675 Mass Ave, Cambridge, MA 02139, USA.
++ *
++ *
++ **************************************************************************
++ * May 2007 Bruce Chang
++ * Initial Release
++ *
++ * May 2009 Bruce Chang
++ * support RT2880/RT3883 PCIe
++ *
++ * May 2011 Bruce Chang
++ * support RT6855/MT7620 PCIe
++ *
++ **************************************************************************
++ */
++
++#include <linux/types.h>
++#include <linux/pci.h>
++#include <linux/kernel.h>
++#include <linux/slab.h>
++#include <linux/version.h>
++#include <asm/pci.h>
++#include <asm/io.h>
++#include <asm/mips-cm.h>
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/delay.h>
++#include <linux/of.h>
++#include <linux/of_pci.h>
++#include <linux/of_irq.h>
++#include <linux/platform_device.h>
++
++#include <ralink_regs.h>
++
++extern void pcie_phy_init(void);
++extern void chk_phy_pll(void);
++
++/*
++ * These functions and structures provide the BIOS scan and mapping of the PCI
++ * devices.
++ */
++
++#define CONFIG_PCIE_PORT0
++#define CONFIG_PCIE_PORT1
++#define CONFIG_PCIE_PORT2
++#define RALINK_PCIE0_CLK_EN (1<<24)
++#define RALINK_PCIE1_CLK_EN (1<<25)
++#define RALINK_PCIE2_CLK_EN (1<<26)
++
++#define RALINK_PCI_CONFIG_ADDR 0x20
++#define RALINK_PCI_CONFIG_DATA_VIRTUAL_REG 0x24
++#define RALINK_INT_PCIE0 pcie_irq[0]
++#define RALINK_INT_PCIE1 pcie_irq[1]
++#define RALINK_INT_PCIE2 pcie_irq[2]
++#define RALINK_PCI_MEMBASE *(volatile u32 *)(RALINK_PCI_BASE + 0x0028)
++#define RALINK_PCI_IOBASE *(volatile u32 *)(RALINK_PCI_BASE + 0x002C)
++#define RALINK_PCIE0_RST (1<<24)
++#define RALINK_PCIE1_RST (1<<25)
++#define RALINK_PCIE2_RST (1<<26)
++#define RALINK_SYSCTL_BASE 0xBE000000
++
++#define RALINK_PCI_PCICFG_ADDR *(volatile u32 *)(RALINK_PCI_BASE + 0x0000)
++#define RALINK_PCI_PCIMSK_ADDR *(volatile u32 *)(RALINK_PCI_BASE + 0x000C)
++#define RALINK_PCI_BASE 0xBE140000
++
++#define RALINK_PCIEPHY_P0P1_CTL_OFFSET (RALINK_PCI_BASE + 0x9000)
++#define RT6855_PCIE0_OFFSET 0x2000
++#define RT6855_PCIE1_OFFSET 0x3000
++#define RT6855_PCIE2_OFFSET 0x4000
++
++#define RALINK_PCI0_BAR0SETUP_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0010)
++#define RALINK_PCI0_IMBASEBAR0_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0018)
++#define RALINK_PCI0_ID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0030)
++#define RALINK_PCI0_CLASS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0034)
++#define RALINK_PCI0_SUBID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0038)
++#define RALINK_PCI0_STATUS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0050)
++#define RALINK_PCI0_DERR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0060)
++#define RALINK_PCI0_ECRC *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0064)
++
++#define RALINK_PCI1_BAR0SETUP_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0010)
++#define RALINK_PCI1_IMBASEBAR0_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0018)
++#define RALINK_PCI1_ID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0030)
++#define RALINK_PCI1_CLASS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0034)
++#define RALINK_PCI1_SUBID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0038)
++#define RALINK_PCI1_STATUS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0050)
++#define RALINK_PCI1_DERR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0060)
++#define RALINK_PCI1_ECRC *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0064)
++
++#define RALINK_PCI2_BAR0SETUP_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0010)
++#define RALINK_PCI2_IMBASEBAR0_ADDR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0018)
++#define RALINK_PCI2_ID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0030)
++#define RALINK_PCI2_CLASS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0034)
++#define RALINK_PCI2_SUBID *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0038)
++#define RALINK_PCI2_STATUS *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0050)
++#define RALINK_PCI2_DERR *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0060)
++#define RALINK_PCI2_ECRC *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0064)
++
++#define RALINK_PCIEPHY_P0P1_CTL_OFFSET (RALINK_PCI_BASE + 0x9000)
++#define RALINK_PCIEPHY_P2_CTL_OFFSET (RALINK_PCI_BASE + 0xA000)
++
++
++#define MV_WRITE(ofs, data) \
++ *(volatile u32 *)(RALINK_PCI_BASE+(ofs)) = cpu_to_le32(data)
++#define MV_READ(ofs, data) \
++ *(data) = le32_to_cpu(*(volatile u32 *)(RALINK_PCI_BASE+(ofs)))
++#define MV_READ_DATA(ofs) \
++ le32_to_cpu(*(volatile u32 *)(RALINK_PCI_BASE+(ofs)))
++
++#define MV_WRITE_16(ofs, data) \
++ *(volatile u16 *)(RALINK_PCI_BASE+(ofs)) = cpu_to_le16(data)
++#define MV_READ_16(ofs, data) \
++ *(data) = le16_to_cpu(*(volatile u16 *)(RALINK_PCI_BASE+(ofs)))
++
++#define MV_WRITE_8(ofs, data) \
++ *(volatile u8 *)(RALINK_PCI_BASE+(ofs)) = data
++#define MV_READ_8(ofs, data) \
++ *(data) = *(volatile u8 *)(RALINK_PCI_BASE+(ofs))
++
++
++
++#define RALINK_PCI_MM_MAP_BASE 0x60000000
++#define RALINK_PCI_IO_MAP_BASE 0x1e160000
++
++#define RALINK_SYSTEM_CONTROL_BASE 0xbe000000
++#define GPIO_PERST
++#define ASSERT_SYSRST_PCIE(val) do { \
++ if (*(unsigned int *)(0xbe00000c) == 0x00030101) \
++ RALINK_RSTCTRL |= val; \
++ else \
++ RALINK_RSTCTRL &= ~val; \
++ } while(0)
++#define DEASSERT_SYSRST_PCIE(val) do { \
++ if (*(unsigned int *)(0xbe00000c) == 0x00030101) \
++ RALINK_RSTCTRL &= ~val; \
++ else \
++ RALINK_RSTCTRL |= val; \
++ } while(0)
++#define RALINK_SYSCFG1 *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x14)
++#define RALINK_CLKCFG1 *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x30)
++#define RALINK_RSTCTRL *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x34)
++#define RALINK_GPIOMODE *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x60)
++#define RALINK_PCIE_CLK_GEN *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x7c)
++#define RALINK_PCIE_CLK_GEN1 *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x80)
++#define PPLL_CFG1 *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x9c)
++#define PPLL_DRV *(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0xa0)
++//RALINK_SYSCFG1 bit
++#define RALINK_PCI_HOST_MODE_EN (1<<7)
++#define RALINK_PCIE_RC_MODE_EN (1<<8)
++//RALINK_RSTCTRL bit
++#define RALINK_PCIE_RST (1<<23)
++#define RALINK_PCI_RST (1<<24)
++//RALINK_CLKCFG1 bit
++#define RALINK_PCI_CLK_EN (1<<19)
++#define RALINK_PCIE_CLK_EN (1<<21)
++//RALINK_GPIOMODE bit
++#define PCI_SLOTx2 (1<<11)
++#define PCI_SLOTx1 (2<<11)
++//MTK PCIE PLL bit
++#define PDRV_SW_SET (1<<31)
++#define LC_CKDRVPD_ (1<<19)
++
++#define MEMORY_BASE 0x0
++static int pcie_link_status = 0;
++
++#define PCI_ACCESS_READ_1 0
++#define PCI_ACCESS_READ_2 1
++#define PCI_ACCESS_READ_4 2
++#define PCI_ACCESS_WRITE_1 3
++#define PCI_ACCESS_WRITE_2 4
++#define PCI_ACCESS_WRITE_4 5
++
++static int pcie_irq[3];
++
++static int config_access(unsigned char access_type, struct pci_bus *bus,
++ unsigned int devfn, unsigned int where, u32 * data)
++{
++ unsigned int slot = PCI_SLOT(devfn);
++ u8 func = PCI_FUNC(devfn);
++ uint32_t address_reg, data_reg;
++ unsigned int address;
++
++ address_reg = RALINK_PCI_CONFIG_ADDR;
++ data_reg = RALINK_PCI_CONFIG_DATA_VIRTUAL_REG;
++
++ address = (((where&0xF00)>>8)<<24) |(bus->number << 16) | (slot << 11) | (func << 8) | (where & 0xfc) | 0x80000000;
++ MV_WRITE(address_reg, address);
++
++ switch(access_type) {
++ case PCI_ACCESS_WRITE_1:
++ MV_WRITE_8(data_reg+(where&0x3), *data);
++ break;
++ case PCI_ACCESS_WRITE_2:
++ MV_WRITE_16(data_reg+(where&0x3), *data);
++ break;
++ case PCI_ACCESS_WRITE_4:
++ MV_WRITE(data_reg, *data);
++ break;
++ case PCI_ACCESS_READ_1:
++ MV_READ_8( data_reg+(where&0x3), data);
++ break;
++ case PCI_ACCESS_READ_2:
++ MV_READ_16(data_reg+(where&0x3), data);
++ break;
++ case PCI_ACCESS_READ_4:
++ MV_READ(data_reg, data);
++ break;
++ default:
++ printk("no specify access type\n");
++ break;
++ }
++ return 0;
++}
++
++static int
++read_config_byte(struct pci_bus *bus, unsigned int devfn, int where, u8 * val)
++{
++ return config_access(PCI_ACCESS_READ_1, bus, devfn, (unsigned int)where, (u32 *)val);
++}
++
++static int
++read_config_word(struct pci_bus *bus, unsigned int devfn, int where, u16 * val)
++{
++ return config_access(PCI_ACCESS_READ_2, bus, devfn, (unsigned int)where, (u32 *)val);
++}
++
++static int
++read_config_dword(struct pci_bus *bus, unsigned int devfn, int where, u32 * val)
++{
++ return config_access(PCI_ACCESS_READ_4, bus, devfn, (unsigned int)where, (u32 *)val);
++}
++
++static int
++write_config_byte(struct pci_bus *bus, unsigned int devfn, int where, u8 val)
++{
++ if (config_access(PCI_ACCESS_WRITE_1, bus, devfn, (unsigned int)where, (u32 *)&val))
++ return -1;
++
++ return PCIBIOS_SUCCESSFUL;
++}
++
++static int
++write_config_word(struct pci_bus *bus, unsigned int devfn, int where, u16 val)
++{
++ if (config_access(PCI_ACCESS_WRITE_2, bus, devfn, where, (u32 *)&val))
++ return -1;
++
++ return PCIBIOS_SUCCESSFUL;
++}
++
++static int
++write_config_dword(struct pci_bus *bus, unsigned int devfn, int where, u32 val)
++{
++ if (config_access(PCI_ACCESS_WRITE_4, bus, devfn, where, &val))
++ return -1;
++
++ return PCIBIOS_SUCCESSFUL;
++}
++
++
++static int
++pci_config_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 * val)
++{
++ switch (size) {
++ case 1:
++ return read_config_byte(bus, devfn, where, (u8 *) val);
++ case 2:
++ return read_config_word(bus, devfn, where, (u16 *) val);
++ default:
++ return read_config_dword(bus, devfn, where, val);
++ }
++}
++
++static int
++pci_config_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val)
++{
++ switch (size) {
++ case 1:
++ return write_config_byte(bus, devfn, where, (u8) val);
++ case 2:
++ return write_config_word(bus, devfn, where, (u16) val);
++ default:
++ return write_config_dword(bus, devfn, where, val);
++ }
++}
++
++struct pci_ops mt7621_pci_ops= {
++ .read = pci_config_read,
++ .write = pci_config_write,
++};
++
++static struct resource mt7621_res_pci_mem1 = {
++ .name = "PCI MEM1",
++ .start = RALINK_PCI_MM_MAP_BASE,
++ .end = (u32)((RALINK_PCI_MM_MAP_BASE + (unsigned char *)0x0fffffff)),
++ .flags = IORESOURCE_MEM,
++};
++static struct resource mt7621_res_pci_io1 = {
++ .name = "PCI I/O1",
++ .start = RALINK_PCI_IO_MAP_BASE,
++ .end = (u32)((RALINK_PCI_IO_MAP_BASE + (unsigned char *)0x0ffff)),
++ .flags = IORESOURCE_IO,
++};
++
++static struct pci_controller mt7621_controller = {
++ .pci_ops = &mt7621_pci_ops,
++ .mem_resource = &mt7621_res_pci_mem1,
++ .io_resource = &mt7621_res_pci_io1,
++ .mem_offset = 0x00000000UL,
++ .io_offset = 0x00000000UL,
++ .io_map_base = 0xa0000000,
++};
++
++static void
++read_config(unsigned long bus, unsigned long dev, unsigned long func, unsigned long reg, unsigned long *val)
++{
++ unsigned int address_reg, data_reg, address;
++
++ address_reg = RALINK_PCI_CONFIG_ADDR;
++ data_reg = RALINK_PCI_CONFIG_DATA_VIRTUAL_REG;
++ address = (((reg & 0xF00)>>8)<<24) | (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) | 0x80000000 ;
++ MV_WRITE(address_reg, address);
++ MV_READ(data_reg, val);
++ return;
++}
++
++static void
++write_config(unsigned long bus, unsigned long dev, unsigned long func, unsigned long reg, unsigned long val)
++{
++ unsigned int address_reg, data_reg, address;
++
++ address_reg = RALINK_PCI_CONFIG_ADDR;
++ data_reg = RALINK_PCI_CONFIG_DATA_VIRTUAL_REG;
++ address = (((reg & 0xF00)>>8)<<24) | (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) | 0x80000000 ;
++ MV_WRITE(address_reg, address);
++ MV_WRITE(data_reg, val);
++ return;
++}
++
++
++int
++pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
++{
++ u16 cmd;
++ u32 val;
++ int irq = 0;
++
++ if ((dev->bus->number == 0) && (slot == 0)) {
++ write_config(0, 0, 0, PCI_BASE_ADDRESS_0, MEMORY_BASE);
++ read_config(0, 0, 0, PCI_BASE_ADDRESS_0, (unsigned long *)&val);
++ printk("BAR0 at slot 0 = %x\n", val);
++ printk("bus=0x%x, slot = 0x%x\n",dev->bus->number, slot);
++ } else if((dev->bus->number == 0) && (slot == 0x1)) {
++ write_config(0, 1, 0, PCI_BASE_ADDRESS_0, MEMORY_BASE);
++ read_config(0, 1, 0, PCI_BASE_ADDRESS_0, (unsigned long *)&val);
++ printk("BAR0 at slot 1 = %x\n", val);
++ printk("bus=0x%x, slot = 0x%x\n",dev->bus->number, slot);
++ } else if((dev->bus->number == 0) && (slot == 0x2)) {
++ write_config(0, 2, 0, PCI_BASE_ADDRESS_0, MEMORY_BASE);
++ read_config(0, 2, 0, PCI_BASE_ADDRESS_0, (unsigned long *)&val);
++ printk("BAR0 at slot 2 = %x\n", val);
++ printk("bus=0x%x, slot = 0x%x\n",dev->bus->number, slot);
++ } else if ((dev->bus->number == 1) && (slot == 0x0)) {
++ switch (pcie_link_status) {
++ case 2:
++ case 6:
++ irq = RALINK_INT_PCIE1;
++ break;
++ case 4:
++ irq = RALINK_INT_PCIE2;
++ break;
++ default:
++ irq = RALINK_INT_PCIE0;
++ }
++ printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev->bus->number, slot, dev->irq);
++ } else if ((dev->bus->number == 2) && (slot == 0x0)) {
++ switch (pcie_link_status) {
++ case 5:
++ case 6:
++ irq = RALINK_INT_PCIE2;
++ break;
++ default:
++ irq = RALINK_INT_PCIE1;
++ }
++ printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev->bus->number, slot, dev->irq);
++ } else if ((dev->bus->number == 2) && (slot == 0x1)) {
++ switch (pcie_link_status) {
++ case 5:
++ case 6:
++ irq = RALINK_INT_PCIE2;
++ break;
++ default:
++ irq = RALINK_INT_PCIE1;
++ }
++ printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev->bus->number, slot, dev->irq);
++ } else if ((dev->bus->number ==3) && (slot == 0x0)) {
++ irq = RALINK_INT_PCIE2;
++ printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev->bus->number, slot, dev->irq);
++ } else if ((dev->bus->number ==3) && (slot == 0x1)) {
++ irq = RALINK_INT_PCIE2;
++ printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev->bus->number, slot, dev->irq);
++ } else if ((dev->bus->number ==3) && (slot == 0x2)) {
++ irq = RALINK_INT_PCIE2;
++ printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev->bus->number, slot, dev->irq);
++ } else {
++ printk("bus=0x%x, slot = 0x%x\n",dev->bus->number, slot);
++ return 0;
++ }
++
++ pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 0x14); //configure cache line size 0x14
++ pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xFF); //configure latency timer 0x10
++ pci_read_config_word(dev, PCI_COMMAND, &cmd);
++ cmd = cmd | PCI_COMMAND_MASTER | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
++ pci_write_config_word(dev, PCI_COMMAND, cmd);
++ pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
++ return irq;
++}
++
++void
++set_pcie_phy(u32 *addr, int start_b, int bits, int val)
++{
++// printk("0x%p:", addr);
++// printk(" %x", *addr);
++ *(unsigned int *)(addr) &= ~(((1<<bits) - 1)<<start_b);
++ *(unsigned int *)(addr) |= val << start_b;
++// printk(" -> %x\n", *addr);
++}
++
++void
++bypass_pipe_rst(void)
++{
++#if defined (CONFIG_PCIE_PORT0)
++ /* PCIe Port 0 */
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x02c), 12, 1, 0x01); // rg_pe1_pipe_rst_b
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x02c), 4, 1, 0x01); // rg_pe1_pipe_cmd_frc[4]
++#endif
++#if defined (CONFIG_PCIE_PORT1)
++ /* PCIe Port 1 */
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x12c), 12, 1, 0x01); // rg_pe1_pipe_rst_b
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x12c), 4, 1, 0x01); // rg_pe1_pipe_cmd_frc[4]
++#endif
++#if defined (CONFIG_PCIE_PORT2)
++ /* PCIe Port 2 */
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x02c), 12, 1, 0x01); // rg_pe1_pipe_rst_b
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x02c), 4, 1, 0x01); // rg_pe1_pipe_cmd_frc[4]
++#endif
++}
++
++void
++set_phy_for_ssc(void)
++{
++ unsigned long reg = (*(volatile u32 *)(RALINK_SYSCTL_BASE + 0x10));
++
++ reg = (reg >> 6) & 0x7;
++#if defined (CONFIG_PCIE_PORT0) || defined (CONFIG_PCIE_PORT1)
++ /* Set PCIe Port0 & Port1 PHY to disable SSC */
++ /* Debug Xtal Type */
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x400), 8, 1, 0x01); // rg_pe1_frc_h_xtal_type
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x400), 9, 2, 0x00); // rg_pe1_h_xtal_type
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x000), 4, 1, 0x01); // rg_pe1_frc_phy_en //Force Port 0 enable control
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x100), 4, 1, 0x01); // rg_pe1_frc_phy_en //Force Port 1 enable control
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x000), 5, 1, 0x00); // rg_pe1_phy_en //Port 0 disable
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x100), 5, 1, 0x00); // rg_pe1_phy_en //Port 1 disable
++ if(reg <= 5 && reg >= 3) { // 40MHz Xtal
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x490), 6, 2, 0x01); // RG_PE1_H_PLL_PREDIV //Pre-divider ratio (for host mode)
++ printk("***** Xtal 40MHz *****\n");
++ } else { // 25MHz | 20MHz Xtal
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x490), 6, 2, 0x00); // RG_PE1_H_PLL_PREDIV //Pre-divider ratio (for host mode)
++ if (reg >= 6) {
++ printk("***** Xtal 25MHz *****\n");
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x4bc), 4, 2, 0x01); // RG_PE1_H_PLL_FBKSEL //Feedback clock select
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x49c), 0,31, 0x18000000); // RG_PE1_H_LCDDS_PCW_NCPO //DDS NCPO PCW (for host mode)
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x4a4), 0,16, 0x18d); // RG_PE1_H_LCDDS_SSC_PRD //DDS SSC dither period control
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x4a8), 0,12, 0x4a); // RG_PE1_H_LCDDS_SSC_DELTA //DDS SSC dither amplitude control
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x4a8), 16,12, 0x4a); // RG_PE1_H_LCDDS_SSC_DELTA1 //DDS SSC dither amplitude control for initial
++ } else {
++ printk("***** Xtal 20MHz *****\n");
++ }
++ }
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x4a0), 5, 1, 0x01); // RG_PE1_LCDDS_CLK_PH_INV //DDS clock inversion
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x490), 22, 2, 0x02); // RG_PE1_H_PLL_BC
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x490), 18, 4, 0x06); // RG_PE1_H_PLL_BP
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x490), 12, 4, 0x02); // RG_PE1_H_PLL_IR
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x490), 8, 4, 0x01); // RG_PE1_H_PLL_IC
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x4ac), 16, 3, 0x00); // RG_PE1_H_PLL_BR
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x490), 1, 3, 0x02); // RG_PE1_PLL_DIVEN
++ if(reg <= 5 && reg >= 3) { // 40MHz Xtal
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x414), 6, 2, 0x01); // rg_pe1_mstckdiv //value of da_pe1_mstckdiv when force mode enable
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x414), 5, 1, 0x01); // rg_pe1_frc_mstckdiv //force mode enable of da_pe1_mstckdiv
++ }
++ /* Enable PHY and disable force mode */
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x000), 5, 1, 0x01); // rg_pe1_phy_en //Port 0 enable
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x100), 5, 1, 0x01); // rg_pe1_phy_en //Port 1 enable
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x000), 4, 1, 0x00); // rg_pe1_frc_phy_en //Force Port 0 disable control
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x100), 4, 1, 0x00); // rg_pe1_frc_phy_en //Force Port 1 disable control
++#endif
++#if defined (CONFIG_PCIE_PORT2)
++ /* Set PCIe Port2 PHY to disable SSC */
++ /* Debug Xtal Type */
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x400), 8, 1, 0x01); // rg_pe1_frc_h_xtal_type
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x400), 9, 2, 0x00); // rg_pe1_h_xtal_type
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x000), 4, 1, 0x01); // rg_pe1_frc_phy_en //Force Port 0 enable control
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x000), 5, 1, 0x00); // rg_pe1_phy_en //Port 0 disable
++ if(reg <= 5 && reg >= 3) { // 40MHz Xtal
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x490), 6, 2, 0x01); // RG_PE1_H_PLL_PREDIV //Pre-divider ratio (for host mode)
++ } else { // 25MHz | 20MHz Xtal
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x490), 6, 2, 0x00); // RG_PE1_H_PLL_PREDIV //Pre-divider ratio (for host mode)
++ if (reg >= 6) { // 25MHz Xtal
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x4bc), 4, 2, 0x01); // RG_PE1_H_PLL_FBKSEL //Feedback clock select
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x49c), 0,31, 0x18000000); // RG_PE1_H_LCDDS_PCW_NCPO //DDS NCPO PCW (for host mode)
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x4a4), 0,16, 0x18d); // RG_PE1_H_LCDDS_SSC_PRD //DDS SSC dither period control
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x4a8), 0,12, 0x4a); // RG_PE1_H_LCDDS_SSC_DELTA //DDS SSC dither amplitude control
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x4a8), 16,12, 0x4a); // RG_PE1_H_LCDDS_SSC_DELTA1 //DDS SSC dither amplitude control for initial
++ }
++ }
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x4a0), 5, 1, 0x01); // RG_PE1_LCDDS_CLK_PH_INV //DDS clock inversion
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x490), 22, 2, 0x02); // RG_PE1_H_PLL_BC
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x490), 18, 4, 0x06); // RG_PE1_H_PLL_BP
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x490), 12, 4, 0x02); // RG_PE1_H_PLL_IR
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x490), 8, 4, 0x01); // RG_PE1_H_PLL_IC
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x4ac), 16, 3, 0x00); // RG_PE1_H_PLL_BR
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x490), 1, 3, 0x02); // RG_PE1_PLL_DIVEN
++ if(reg <= 5 && reg >= 3) { // 40MHz Xtal
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x414), 6, 2, 0x01); // rg_pe1_mstckdiv //value of da_pe1_mstckdiv when force mode enable
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x414), 5, 1, 0x01); // rg_pe1_frc_mstckdiv //force mode enable of da_pe1_mstckdiv
++ }
++ /* Enable PHY and disable force mode */
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x000), 5, 1, 0x01); // rg_pe1_phy_en //Port 0 enable
++ set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x000), 4, 1, 0x00); // rg_pe1_frc_phy_en //Force Port 0 disable control
++#endif
++}
++
++void setup_cm_memory_region(struct resource *mem_resource)
++{
++ resource_size_t mask;
++ if (mips_cps_numiocu(0)) {
++ /* FIXME: hardware doesn't accept mask values with 1s after
++ 0s (e.g. 0xffef), so it would be great to warn if that's
++ about to happen */
++ mask = ~(mem_resource->end - mem_resource->start);
++
++ write_gcr_reg1_base(mem_resource->start);
++ write_gcr_reg1_mask(mask | CM_GCR_REGn_MASK_CMTGT_IOCU0);
++ printk("PCI coherence region base: 0x%08lx, mask/settings: 0x%08lx\n",
++ read_gcr_reg1_base(),
++ read_gcr_reg1_mask());
++ }
++}
++
++static int mt7621_pci_probe(struct platform_device *pdev)
++{
++ unsigned long val = 0;
++ int i;
++
++ for (i = 0; i < 3; i++)
++ pcie_irq[i] = irq_of_parse_and_map(pdev->dev.of_node, i);
++
++ iomem_resource.start = 0;
++ iomem_resource.end= ~0;
++ ioport_resource.start= 0;
++ ioport_resource.end = ~0;
++
++#if defined (CONFIG_PCIE_PORT0)
++ val = RALINK_PCIE0_RST;
++#endif
++#if defined (CONFIG_PCIE_PORT1)
++ val |= RALINK_PCIE1_RST;
++#endif
++#if defined (CONFIG_PCIE_PORT2)
++ val |= RALINK_PCIE2_RST;
++#endif
++ ASSERT_SYSRST_PCIE(RALINK_PCIE0_RST | RALINK_PCIE1_RST | RALINK_PCIE2_RST);
++ printk("pull PCIe RST: RALINK_RSTCTRL = %x\n", RALINK_RSTCTRL);
++#if defined GPIO_PERST /* add GPIO control instead of PERST_N */ /*chhung*/
++ *(unsigned int *)(0xbe000060) &= ~(0x3<<10 | 0x3<<3);
++ *(unsigned int *)(0xbe000060) |= 0x1<<10 | 0x1<<3;
++ mdelay(100);
++ *(unsigned int *)(0xbe000600) |= 0x1<<19 | 0x1<<8 | 0x1<<7; // use GPIO19/GPIO8/GPIO7 (PERST_N/UART_RXD3/UART_TXD3)
++ mdelay(100);
++ *(unsigned int *)(0xbe000620) &= ~(0x1<<19 | 0x1<<8 | 0x1<<7); // clear DATA
++
++ mdelay(100);
++#else
++ *(unsigned int *)(0xbe000060) &= ~0x00000c00;
++#endif
++#if defined (CONFIG_PCIE_PORT0)
++ val = RALINK_PCIE0_RST;
++#endif
++#if defined (CONFIG_PCIE_PORT1)
++ val |= RALINK_PCIE1_RST;
++#endif
++#if defined (CONFIG_PCIE_PORT2)
++ val |= RALINK_PCIE2_RST;
++#endif
++ DEASSERT_SYSRST_PCIE(val);
++ printk("release PCIe RST: RALINK_RSTCTRL = %x\n", RALINK_RSTCTRL);
++
++ if ((*(unsigned int *)(0xbe00000c)&0xFFFF) == 0x0101) // MT7621 E2
++ bypass_pipe_rst();
++ set_phy_for_ssc();
++ printk("release PCIe RST: RALINK_RSTCTRL = %x\n", RALINK_RSTCTRL);
++
++#if defined (CONFIG_PCIE_PORT0)
++ read_config(0, 0, 0, 0x70c, &val);
++ printk("Port 0 N_FTS = %x\n", (unsigned int)val);
++#endif
++#if defined (CONFIG_PCIE_PORT1)
++ read_config(0, 1, 0, 0x70c, &val);
++ printk("Port 1 N_FTS = %x\n", (unsigned int)val);
++#endif
++#if defined (CONFIG_PCIE_PORT2)
++ read_config(0, 2, 0, 0x70c, &val);
++ printk("Port 2 N_FTS = %x\n", (unsigned int)val);
++#endif
++
++ RALINK_RSTCTRL = (RALINK_RSTCTRL | RALINK_PCIE_RST);
++ RALINK_SYSCFG1 &= ~(0x30);
++ RALINK_SYSCFG1 |= (2<<4);
++ RALINK_PCIE_CLK_GEN &= 0x7fffffff;
++ RALINK_PCIE_CLK_GEN1 &= 0x80ffffff;
++ RALINK_PCIE_CLK_GEN1 |= 0xa << 24;
++ RALINK_PCIE_CLK_GEN |= 0x80000000;
++ mdelay(50);
++ RALINK_RSTCTRL = (RALINK_RSTCTRL & ~RALINK_PCIE_RST);
++
++
++#if defined GPIO_PERST /* add GPIO control instead of PERST_N */ /*chhung*/
++ *(unsigned int *)(0xbe000620) |= 0x1<<19 | 0x1<<8 | 0x1<<7; // set DATA
++ mdelay(100);
++#else
++ RALINK_PCI_PCICFG_ADDR &= ~(1<<1); //de-assert PERST
++#endif
++ mdelay(500);
++
++
++ mdelay(500);
++#if defined (CONFIG_PCIE_PORT0)
++ if(( RALINK_PCI0_STATUS & 0x1) == 0)
++ {
++ printk("PCIE0 no card, disable it(RST&CLK)\n");
++ ASSERT_SYSRST_PCIE(RALINK_PCIE0_RST);
++ RALINK_CLKCFG1 = (RALINK_CLKCFG1 & ~RALINK_PCIE0_CLK_EN);
++ pcie_link_status &= ~(1<<0);
++ } else {
++ pcie_link_status |= 1<<0;
++ RALINK_PCI_PCIMSK_ADDR |= (1<<20); // enable pcie1 interrupt
++ }
++#endif
++#if defined (CONFIG_PCIE_PORT1)
++ if(( RALINK_PCI1_STATUS & 0x1) == 0)
++ {
++ printk("PCIE1 no card, disable it(RST&CLK)\n");
++ ASSERT_SYSRST_PCIE(RALINK_PCIE1_RST);
++ RALINK_CLKCFG1 = (RALINK_CLKCFG1 & ~RALINK_PCIE1_CLK_EN);
++ pcie_link_status &= ~(1<<1);
++ } else {
++ pcie_link_status |= 1<<1;
++ RALINK_PCI_PCIMSK_ADDR |= (1<<21); // enable pcie1 interrupt
++ }
++#endif
++#if defined (CONFIG_PCIE_PORT2)
++ if (( RALINK_PCI2_STATUS & 0x1) == 0) {
++ printk("PCIE2 no card, disable it(RST&CLK)\n");
++ ASSERT_SYSRST_PCIE(RALINK_PCIE2_RST);
++ RALINK_CLKCFG1 = (RALINK_CLKCFG1 & ~RALINK_PCIE2_CLK_EN);
++ pcie_link_status &= ~(1<<2);
++ } else {
++ pcie_link_status |= 1<<2;
++ RALINK_PCI_PCIMSK_ADDR |= (1<<22); // enable pcie2 interrupt
++ }
++#endif
++ if (pcie_link_status == 0)
++ return 0;
++
++/*
++pcie(2/1/0) link status pcie2_num pcie1_num pcie0_num
++3'b000 x x x
++3'b001 x x 0
++3'b010 x 0 x
++3'b011 x 1 0
++3'b100 0 x x
++3'b101 1 x 0
++3'b110 1 0 x
++3'b111 2 1 0
++*/
++ switch(pcie_link_status) {
++ case 2:
++ RALINK_PCI_PCICFG_ADDR &= ~0x00ff0000;
++ RALINK_PCI_PCICFG_ADDR |= 0x1 << 16; //port0
++ RALINK_PCI_PCICFG_ADDR |= 0x0 << 20; //port1
++ break;
++ case 4:
++ RALINK_PCI_PCICFG_ADDR &= ~0x0fff0000;
++ RALINK_PCI_PCICFG_ADDR |= 0x1 << 16; //port0
++ RALINK_PCI_PCICFG_ADDR |= 0x2 << 20; //port1
++ RALINK_PCI_PCICFG_ADDR |= 0x0 << 24; //port2
++ break;
++ case 5:
++ RALINK_PCI_PCICFG_ADDR &= ~0x0fff0000;
++ RALINK_PCI_PCICFG_ADDR |= 0x0 << 16; //port0
++ RALINK_PCI_PCICFG_ADDR |= 0x2 << 20; //port1
++ RALINK_PCI_PCICFG_ADDR |= 0x1 << 24; //port2
++ break;
++ case 6:
++ RALINK_PCI_PCICFG_ADDR &= ~0x0fff0000;
++ RALINK_PCI_PCICFG_ADDR |= 0x2 << 16; //port0
++ RALINK_PCI_PCICFG_ADDR |= 0x0 << 20; //port1
++ RALINK_PCI_PCICFG_ADDR |= 0x1 << 24; //port2
++ break;
++ }
++ printk(" -> %x\n", RALINK_PCI_PCICFG_ADDR);
++ //printk(" RALINK_PCI_ARBCTL = %x\n", RALINK_PCI_ARBCTL);
++
++/*
++ ioport_resource.start = mt7621_res_pci_io1.start;
++ ioport_resource.end = mt7621_res_pci_io1.end;
++*/
++
++ RALINK_PCI_MEMBASE = 0xffffffff; //RALINK_PCI_MM_MAP_BASE;
++ RALINK_PCI_IOBASE = RALINK_PCI_IO_MAP_BASE;
++
++#if defined (CONFIG_PCIE_PORT0)
++ //PCIe0
++ if((pcie_link_status & 0x1) != 0) {
++ RALINK_PCI0_BAR0SETUP_ADDR = 0x7FFF0001; //open 7FFF:2G; ENABLE
++ RALINK_PCI0_IMBASEBAR0_ADDR = MEMORY_BASE;
++ RALINK_PCI0_CLASS = 0x06040001;
++ printk("PCIE0 enabled\n");
++ }
++#endif
++#if defined (CONFIG_PCIE_PORT1)
++ //PCIe1
++ if ((pcie_link_status & 0x2) != 0) {
++ RALINK_PCI1_BAR0SETUP_ADDR = 0x7FFF0001; //open 7FFF:2G; ENABLE
++ RALINK_PCI1_IMBASEBAR0_ADDR = MEMORY_BASE;
++ RALINK_PCI1_CLASS = 0x06040001;
++ printk("PCIE1 enabled\n");
++ }
++#endif
++#if defined (CONFIG_PCIE_PORT2)
++ //PCIe2
++ if ((pcie_link_status & 0x4) != 0) {
++ RALINK_PCI2_BAR0SETUP_ADDR = 0x7FFF0001; //open 7FFF:2G; ENABLE
++ RALINK_PCI2_IMBASEBAR0_ADDR = MEMORY_BASE;
++ RALINK_PCI2_CLASS = 0x06040001;
++ printk("PCIE2 enabled\n");
++ }
++#endif
++
++
++ switch(pcie_link_status) {
++ case 7:
++ read_config(0, 2, 0, 0x4, &val);
++ write_config(0, 2, 0, 0x4, val|0x4);
++ // write_config(0, 1, 0, 0x4, val|0x7);
++ read_config(0, 2, 0, 0x70c, &val);
++ val &= ~(0xff)<<8;
++ val |= 0x50<<8;
++ write_config(0, 2, 0, 0x70c, val);
++ case 3:
++ case 5:
++ case 6:
++ read_config(0, 1, 0, 0x4, &val);
++ write_config(0, 1, 0, 0x4, val|0x4);
++ // write_config(0, 1, 0, 0x4, val|0x7);
++ read_config(0, 1, 0, 0x70c, &val);
++ val &= ~(0xff)<<8;
++ val |= 0x50<<8;
++ write_config(0, 1, 0, 0x70c, val);
++ default:
++ read_config(0, 0, 0, 0x4, &val);
++ write_config(0, 0, 0, 0x4, val|0x4); //bus master enable
++ // write_config(0, 0, 0, 0x4, val|0x7); //bus master enable
++ read_config(0, 0, 0, 0x70c, &val);
++ val &= ~(0xff)<<8;
++ val |= 0x50<<8;
++ write_config(0, 0, 0, 0x70c, val);
++ }
++
++ pci_load_of_ranges(&mt7621_controller, pdev->dev.of_node);
++ setup_cm_memory_region(mt7621_controller.mem_resource);
++ register_pci_controller(&mt7621_controller);
++ return 0;
++
++}
++
++int pcibios_plat_dev_init(struct pci_dev *dev)
++{
++ return 0;
++}
++
++static const struct of_device_id mt7621_pci_ids[] = {
++ { .compatible = "mediatek,mt7621-pci" },
++ {},
++};
++MODULE_DEVICE_TABLE(of, mt7621_pci_ids);
++
++static struct platform_driver mt7621_pci_driver = {
++ .probe = mt7621_pci_probe,
++ .driver = {
++ .name = "mt7621-pci",
++ .owner = THIS_MODULE,
++ .of_match_table = of_match_ptr(mt7621_pci_ids),
++ },
++};
++
++static int __init mt7621_pci_init(void)
++{
++ return platform_driver_register(&mt7621_pci_driver);
++}
++
++arch_initcall(mt7621_pci_init);
diff --git a/target/linux/ramips/patches-5.4/0005-MIPS-use-set_mode-to-enable-disable-the-cevt-r4k-irq.patch b/target/linux/ramips/patches-5.4/0005-MIPS-use-set_mode-to-enable-disable-the-cevt-r4k-irq.patch
new file mode 100644
index 00000000000..773c74f4e92
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0005-MIPS-use-set_mode-to-enable-disable-the-cevt-r4k-irq.patch
@@ -0,0 +1,82 @@
+From ce3d4a4111a5f7e6b4e74bceae5faa6ce388e8ec Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 14 Jul 2013 23:08:11 +0200
+Subject: [PATCH 05/53] MIPS: use set_mode() to enable/disable the cevt-r4k
+ irq
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/ralink/Kconfig | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+--- a/arch/mips/ralink/Kconfig
++++ b/arch/mips/ralink/Kconfig
+@@ -1,12 +1,17 @@
+ # SPDX-License-Identifier: GPL-2.0
+ if RALINK
+
++config CEVT_SYSTICK_QUIRK
++ bool
++ default n
++
+ config CLKEVT_RT3352
+ bool
+ depends on SOC_RT305X || SOC_MT7620
+ default y
+ select TIMER_OF
+ select CLKSRC_MMIO
++ select CEVT_SYSTICK_QUIRK
+
+ config RALINK_ILL_ACC
+ bool
+--- a/arch/mips/kernel/cevt-r4k.c
++++ b/arch/mips/kernel/cevt-r4k.c
+@@ -15,6 +15,26 @@
+ #include <asm/time.h>
+ #include <asm/cevt-r4k.h>
+
++static int mips_state_oneshot(struct clock_event_device *evt)
++{
++ if (!cp0_timer_irq_installed) {
++ cp0_timer_irq_installed = 1;
++ setup_irq(evt->irq, &c0_compare_irqaction);
++ }
++
++ return 0;
++}
++
++static int mips_state_shutdown(struct clock_event_device *evt)
++{
++ if (cp0_timer_irq_installed) {
++ cp0_timer_irq_installed = 0;
++ remove_irq(evt->irq, &c0_compare_irqaction);
++ }
++
++ return 0;
++}
++
+ static int mips_next_event(unsigned long delta,
+ struct clock_event_device *evt)
+ {
+@@ -281,17 +301,21 @@ int r4k_clockevent_init(void)
+ cd->rating = 300;
+ cd->irq = irq;
+ cd->cpumask = cpumask_of(cpu);
++ cd->set_state_shutdown = mips_state_shutdown;
++ cd->set_state_oneshot = mips_state_oneshot;
+ cd->set_next_event = mips_next_event;
+ cd->event_handler = mips_event_handler;
+
+ clockevents_config_and_register(cd, mips_hpt_frequency, min_delta, 0x7fffffff);
+
++#ifndef CONFIG_CEVT_SYSTICK_QUIRK
+ if (cp0_timer_irq_installed)
+ return 0;
+
+ cp0_timer_irq_installed = 1;
+
+ setup_irq(irq, &c0_compare_irqaction);
++#endif
+
+ return 0;
+ }
diff --git a/target/linux/ramips/patches-5.4/0006-MIPS-ralink-add-cpu-frequency-scaling.patch b/target/linux/ramips/patches-5.4/0006-MIPS-ralink-add-cpu-frequency-scaling.patch
new file mode 100644
index 00000000000..90215fbf86d
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0006-MIPS-ralink-add-cpu-frequency-scaling.patch
@@ -0,0 +1,200 @@
+From bd30f19a006fb52bac80c6463c49dd2f4159f4ac Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 28 Jul 2013 16:26:41 +0200
+Subject: [PATCH 06/53] MIPS: ralink: add cpu frequency scaling
+
+This feature will break udelay() and cause the delay loop to have longer delays
+when the frequency is scaled causing a performance hit.
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/ralink/cevt-rt3352.c | 38 ++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 38 insertions(+)
+
+--- a/arch/mips/ralink/cevt-rt3352.c
++++ b/arch/mips/ralink/cevt-rt3352.c
+@@ -29,6 +29,10 @@
+ /* enable the counter */
+ #define CFG_CNT_EN 0x1
+
++/* mt7620 frequency scaling defines */
++#define CLK_LUT_CFG 0x40
++#define SLEEP_EN BIT(31)
++
+ struct systick_device {
+ void __iomem *membase;
+ struct clock_event_device dev;
+@@ -36,21 +40,53 @@ struct systick_device {
+ int freq_scale;
+ };
+
++static void (*systick_freq_scaling)(struct systick_device *sdev, int status);
++
+ static int systick_set_oneshot(struct clock_event_device *evt);
+ static int systick_shutdown(struct clock_event_device *evt);
+
++static inline void mt7620_freq_scaling(struct systick_device *sdev, int status)
++{
++ if (sdev->freq_scale == status)
++ return;
++
++ sdev->freq_scale = status;
++
++ pr_info("%s: %s autosleep mode\n", sdev->dev.name,
++ (status) ? ("enable") : ("disable"));
++ if (status)
++ rt_sysc_w32(rt_sysc_r32(CLK_LUT_CFG) | SLEEP_EN, CLK_LUT_CFG);
++ else
++ rt_sysc_w32(rt_sysc_r32(CLK_LUT_CFG) & ~SLEEP_EN, CLK_LUT_CFG);
++}
++
++static inline unsigned int read_count(struct systick_device *sdev)
++{
++ return ioread32(sdev->membase + SYSTICK_COUNT);
++}
++
++static inline unsigned int read_compare(struct systick_device *sdev)
++{
++ return ioread32(sdev->membase + SYSTICK_COMPARE);
++}
++
++static inline void write_compare(struct systick_device *sdev, unsigned int val)
++{
++ iowrite32(val, sdev->membase + SYSTICK_COMPARE);
++}
++
+ static int systick_next_event(unsigned long delta,
+ struct clock_event_device *evt)
+ {
+ struct systick_device *sdev;
+- u32 count;
++ int res;
+
+ sdev = container_of(evt, struct systick_device, dev);
+- count = ioread32(sdev->membase + SYSTICK_COUNT);
+- count = (count + delta) % SYSTICK_FREQ;
+- iowrite32(count, sdev->membase + SYSTICK_COMPARE);
++ delta += read_count(sdev);
++ write_compare(sdev, delta);
++ res = ((int)(read_count(sdev) - delta) >= 0) ? -ETIME : 0;
+
+- return 0;
++ return res;
+ }
+
+ static void systick_event_handler(struct clock_event_device *dev)
+@@ -60,20 +96,25 @@ static void systick_event_handler(struct
+
+ static irqreturn_t systick_interrupt(int irq, void *dev_id)
+ {
+- struct clock_event_device *dev = (struct clock_event_device *) dev_id;
++ int ret = 0;
++ struct clock_event_device *cdev;
++ struct systick_device *sdev;
+
+- dev->event_handler(dev);
++ if (read_c0_cause() & STATUSF_IP7) {
++ cdev = (struct clock_event_device *) dev_id;
++ sdev = container_of(cdev, struct systick_device, dev);
++
++ /* Clear Count/Compare Interrupt */
++ write_compare(sdev, read_compare(sdev));
++ cdev->event_handler(cdev);
++ ret = 1;
++ }
+
+- return IRQ_HANDLED;
++ return IRQ_RETVAL(ret);
+ }
+
+ static struct systick_device systick = {
+ .dev = {
+- /*
+- * cevt-r4k uses 300, make sure systick
+- * gets used if available
+- */
+- .rating = 310,
+ .features = CLOCK_EVT_FEAT_ONESHOT,
+ .set_next_event = systick_next_event,
+ .set_state_shutdown = systick_shutdown,
+@@ -95,9 +136,15 @@ static int systick_shutdown(struct clock
+ sdev = container_of(evt, struct systick_device, dev);
+
+ if (sdev->irq_requested)
+- free_irq(systick.dev.irq, &systick_irqaction);
++ remove_irq(systick.dev.irq, &systick_irqaction);
+ sdev->irq_requested = 0;
+- iowrite32(0, systick.membase + SYSTICK_CONFIG);
++ iowrite32(CFG_CNT_EN, systick.membase + SYSTICK_CONFIG);
++
++ if (systick_freq_scaling)
++ systick_freq_scaling(sdev, 0);
++
++ if (systick_freq_scaling)
++ systick_freq_scaling(sdev, 1);
+
+ return 0;
+ }
+@@ -117,34 +164,48 @@ static int systick_set_oneshot(struct cl
+ return 0;
+ }
+
++static const struct of_device_id systick_match[] = {
++ { .compatible = "ralink,mt7620a-systick", .data = mt7620_freq_scaling},
++ {},
++};
++
+ static int __init ralink_systick_init(struct device_node *np)
+ {
++ const struct of_device_id *match;
++ int rating = 200;
+ int ret;
+
+ systick.membase = of_iomap(np, 0);
+ if (!systick.membase)
+ return -ENXIO;
+
+- systick_irqaction.name = np->name;
+- systick.dev.name = np->name;
+- clockevents_calc_mult_shift(&systick.dev, SYSTICK_FREQ, 60);
+- systick.dev.max_delta_ns = clockevent_delta2ns(0x7fff, &systick.dev);
+- systick.dev.max_delta_ticks = 0x7fff;
+- systick.dev.min_delta_ns = clockevent_delta2ns(0x3, &systick.dev);
+- systick.dev.min_delta_ticks = 0x3;
++ match = of_match_node(systick_match, np);
++ if (match) {
++ systick_freq_scaling = match->data;
++ /*
++ * cevt-r4k uses 300, make sure systick
++ * gets used if available
++ */
++ rating = 310;
++ }
++
++ /* enable counter than register clock source */
++ iowrite32(CFG_CNT_EN, systick.membase + SYSTICK_CONFIG);
++ clocksource_mmio_init(systick.membase + SYSTICK_COUNT, np->name,
++ SYSTICK_FREQ, rating, 16, clocksource_mmio_readl_up);
++
++ /* register clock event */
+ systick.dev.irq = irq_of_parse_and_map(np, 0);
+ if (!systick.dev.irq) {
+ pr_err("%s: request_irq failed", np->name);
+ return -EINVAL;
+ }
+
+- ret = clocksource_mmio_init(systick.membase + SYSTICK_COUNT, np->name,
+- SYSTICK_FREQ, 301, 16,
+- clocksource_mmio_readl_up);
+- if (ret)
+- return ret;
+-
+- clockevents_register_device(&systick.dev);
++ systick_irqaction.name = np->name;
++ systick.dev.name = np->name;
++ systick.dev.rating = rating;
++ systick.dev.cpumask = cpumask_of(0);
++ clockevents_config_and_register(&systick.dev, SYSTICK_FREQ, 0x3, 0x7fff);
+
+ pr_info("%s: running - mult: %d, shift: %d\n",
+ np->name, systick.dev.mult, systick.dev.shift);
diff --git a/target/linux/ramips/patches-5.4/0007-MIPS-ralink-copy-the-commandline-from-the-devicetree.patch b/target/linux/ramips/patches-5.4/0007-MIPS-ralink-copy-the-commandline-from-the-devicetree.patch
new file mode 100644
index 00000000000..c05ee8018d3
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0007-MIPS-ralink-copy-the-commandline-from-the-devicetree.patch
@@ -0,0 +1,21 @@
+From 67b7bff0fd364c194e653f69baa623ba2141bd4c Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Mon, 4 Aug 2014 18:46:02 +0200
+Subject: [PATCH 07/53] MIPS: ralink: copy the commandline from the devicetree
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/ralink/of.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/arch/mips/ralink/of.c
++++ b/arch/mips/ralink/of.c
+@@ -82,6 +82,8 @@ void __init plat_mem_setup(void)
+
+ __dt_setup_arch(dtb);
+
++ strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
++
+ of_scan_flat_dt(early_init_dt_find_memory, NULL);
+ if (memory_dtb)
+ of_scan_flat_dt(early_init_dt_scan_memory, NULL);
diff --git a/target/linux/ramips/patches-5.4/0009-PCI-MIPS-enable-PCIe-on-MT7688.patch b/target/linux/ramips/patches-5.4/0009-PCI-MIPS-enable-PCIe-on-MT7688.patch
new file mode 100644
index 00000000000..6ca15fe32ed
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0009-PCI-MIPS-enable-PCIe-on-MT7688.patch
@@ -0,0 +1,28 @@
+From 7768798964eb0e4f95eaecffb93b5d0ca28a38af Mon Sep 17 00:00:00 2001
+From: Daniel Golle <daniel@makrotopia.org>
+Date: Sat, 3 Jun 2017 20:00:03 +0200
+Subject: [PATCH] MIPS: pci-mt7620: enabled PCIe on MT7688
+To: linux-mips@linux-mips.org,
+ John Crispin <john@phrozen.org>
+Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn>,
+ Ralf Baechle <ralf@linux-mips.org>,
+ linux-mediatek@lists.infradead.org
+
+Use PCIe support for MT7628AN also on MT7688.
+Tested on WRTNODE2R.
+
+Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+---
+ arch/mips/pci/pci-mt7620.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/arch/mips/pci/pci-mt7620.c
++++ b/arch/mips/pci/pci-mt7620.c
+@@ -316,6 +316,7 @@ static int mt7620_pci_probe(struct platf
+ break;
+
+ case MT762X_SOC_MT7628AN:
++ case MT762X_SOC_MT7688:
+ if (mt7628_pci_hw_init(pdev))
+ return -1;
+ break;
diff --git a/target/linux/ramips/patches-5.4/0013-owrt-hack-fix-mt7688-cache-issue.patch b/target/linux/ramips/patches-5.4/0013-owrt-hack-fix-mt7688-cache-issue.patch
new file mode 100644
index 00000000000..442f3180a3b
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0013-owrt-hack-fix-mt7688-cache-issue.patch
@@ -0,0 +1,28 @@
+From 5ede027f6c4a57ed25da872420508b7f1168b36b Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Mon, 7 Dec 2015 17:15:32 +0100
+Subject: [PATCH 13/53] owrt: hack: fix mt7688 cache issue
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/kernel/setup.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/mips/kernel/setup.c
++++ b/arch/mips/kernel/setup.c
+@@ -910,7 +910,6 @@ static void __init arch_mem_init(char **
+ crashk_res.end - crashk_res.start + 1,
+ BOOTMEM_DEFAULT);
+ #endif
+- device_tree_init();
+ sparse_init();
+ plat_swiotlb_setup();
+
+@@ -1026,6 +1025,7 @@ void __init setup_arch(char **cmdline_p)
+
+ cpu_cache_init();
+ paging_init();
++ device_tree_init();
+ }
+
+ unsigned long kernelsp[NR_CPUS];
diff --git a/target/linux/ramips/patches-5.4/0015-arch-mips-do-not-select-illegal-access-driver-by-def.patch b/target/linux/ramips/patches-5.4/0015-arch-mips-do-not-select-illegal-access-driver-by-def.patch
new file mode 100644
index 00000000000..1dc54ccf232
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0015-arch-mips-do-not-select-illegal-access-driver-by-def.patch
@@ -0,0 +1,25 @@
+From 9e6ce539092a1dd605a20bf73c655a9de58d8641 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Mon, 7 Dec 2015 17:18:05 +0100
+Subject: [PATCH 15/53] arch: mips: do not select illegal access driver by
+ default
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/ralink/Kconfig | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/arch/mips/ralink/Kconfig
++++ b/arch/mips/ralink/Kconfig
+@@ -14,9 +14,9 @@ config CLKEVT_RT3352
+ select CEVT_SYSTICK_QUIRK
+
+ config RALINK_ILL_ACC
+- bool
++ bool "illegal access irq"
+ depends on SOC_RT305X
+- default y
++ default n
+
+ config IRQ_INTC
+ bool
diff --git a/target/linux/ramips/patches-5.4/0024-GPIO-add-named-gpio-exports.patch b/target/linux/ramips/patches-5.4/0024-GPIO-add-named-gpio-exports.patch
new file mode 100644
index 00000000000..61ed9ea784e
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0024-GPIO-add-named-gpio-exports.patch
@@ -0,0 +1,165 @@
+From 4267880319bc1a2270d352e0ded6d6386242a7ef Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Tue, 12 Aug 2014 20:49:27 +0200
+Subject: [PATCH 24/53] GPIO: add named gpio exports
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/gpio/gpiolib-of.c | 68 +++++++++++++++++++++++++++++++++++++++++
+ drivers/gpio/gpiolib-sysfs.c | 10 +++++-
+ include/asm-generic/gpio.h | 6 ++++
+ include/linux/gpio/consumer.h | 8 +++++
+ 4 files changed, 91 insertions(+), 1 deletion(-)
+
+--- a/drivers/gpio/gpiolib-of.c
++++ b/drivers/gpio/gpiolib-of.c
+@@ -23,6 +23,8 @@
+ #include <linux/pinctrl/pinctrl.h>
+ #include <linux/slab.h>
+ #include <linux/gpio/machine.h>
++#include <linux/init.h>
++#include <linux/platform_device.h>
+
+ #include "gpiolib.h"
+
+@@ -513,3 +515,68 @@ void of_gpiochip_remove(struct gpio_chip
+ gpiochip_remove_pin_ranges(chip);
+ of_node_put(chip->of_node);
+ }
++
++static struct of_device_id gpio_export_ids[] = {
++ { .compatible = "gpio-export" },
++ { /* sentinel */ }
++};
++
++static int of_gpio_export_probe(struct platform_device *pdev)
++{
++ struct device_node *np = pdev->dev.of_node;
++ struct device_node *cnp;
++ u32 val;
++ int nb = 0;
++
++ for_each_child_of_node(np, cnp) {
++ const char *name = NULL;
++ int gpio;
++ bool dmc;
++ int max_gpio = 1;
++ int i;
++
++ of_property_read_string(cnp, "gpio-export,name", &name);
++
++ if (!name)
++ max_gpio = of_gpio_count(cnp);
++
++ for (i = 0; i < max_gpio; i++) {
++ unsigned flags = 0;
++ enum of_gpio_flags of_flags;
++
++ gpio = of_get_gpio_flags(cnp, i, &of_flags);
++ if (!gpio_is_valid(gpio))
++ return gpio;
++
++ if (of_flags == OF_GPIO_ACTIVE_LOW)
++ flags |= GPIOF_ACTIVE_LOW;
++
++ if (!of_property_read_u32(cnp, "gpio-export,output", &val))
++ flags |= val ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW;
++ else
++ flags |= GPIOF_IN;
++
++ if (devm_gpio_request_one(&pdev->dev, gpio, flags, name ? name : of_node_full_name(np)))
++ continue;
++
++ dmc = of_property_read_bool(cnp, "gpio-export,direction_may_change");
++ gpio_export_with_name(gpio, dmc, name);
++ nb++;
++ }
++ }
++
++ dev_info(&pdev->dev, "%d gpio(s) exported\n", nb);
++
++ return 0;
++}
++
++static struct platform_driver gpio_export_driver = {
++ .driver = {
++ .name = "gpio-export",
++ .owner = THIS_MODULE,
++ .of_match_table = of_match_ptr(gpio_export_ids),
++ },
++ .probe = of_gpio_export_probe,
++};
++
++module_platform_driver(gpio_export_driver);
+--- a/drivers/gpio/gpiolib-sysfs.c
++++ b/drivers/gpio/gpiolib-sysfs.c
+@@ -553,7 +553,7 @@ static struct class gpio_class = {
+ *
+ * Returns zero on success, else an error.
+ */
+-int gpiod_export(struct gpio_desc *desc, bool direction_may_change)
++int __gpiod_export(struct gpio_desc *desc, bool direction_may_change, const char *name)
+ {
+ struct gpio_chip *chip;
+ struct gpio_device *gdev;
+@@ -615,6 +615,8 @@ int gpiod_export(struct gpio_desc *desc,
+ offset = gpio_chip_hwgpio(desc);
+ if (chip->names && chip->names[offset])
+ ioname = chip->names[offset];
++ if (name)
++ ioname = name;
+
+ dev = device_create_with_groups(&gpio_class, &gdev->dev,
+ MKDEV(0, 0), data, gpio_groups,
+@@ -636,6 +638,12 @@ err_unlock:
+ gpiod_dbg(desc, "%s: status %d\n", __func__, status);
+ return status;
+ }
++EXPORT_SYMBOL_GPL(__gpiod_export);
++
++int gpiod_export(struct gpio_desc *desc, bool direction_may_change)
++{
++ return __gpiod_export(desc, direction_may_change, NULL);
++}
+ EXPORT_SYMBOL_GPL(gpiod_export);
+
+ static int match_export(struct device *dev, const void *desc)
+--- a/include/asm-generic/gpio.h
++++ b/include/asm-generic/gpio.h
+@@ -127,6 +127,12 @@ static inline int gpio_export(unsigned g
+ return gpiod_export(gpio_to_desc(gpio), direction_may_change);
+ }
+
++int __gpiod_export(struct gpio_desc *desc, bool direction_may_change, const char *name);
++static inline int gpio_export_with_name(unsigned gpio, bool direction_may_change, const char *name)
++{
++ return __gpiod_export(gpio_to_desc(gpio), direction_may_change, name);
++}
++
+ static inline int gpio_export_link(struct device *dev, const char *name,
+ unsigned gpio)
+ {
+--- a/include/linux/gpio/consumer.h
++++ b/include/linux/gpio/consumer.h
+@@ -451,6 +451,7 @@ struct gpio_desc *devm_fwnode_get_gpiod_
+
+ #if IS_ENABLED(CONFIG_GPIOLIB) && IS_ENABLED(CONFIG_GPIO_SYSFS)
+
++int _gpiod_export(struct gpio_desc *desc, bool direction_may_change, const char *name);
+ int gpiod_export(struct gpio_desc *desc, bool direction_may_change);
+ int gpiod_export_link(struct device *dev, const char *name,
+ struct gpio_desc *desc);
+@@ -458,6 +459,13 @@ void gpiod_unexport(struct gpio_desc *de
+
+ #else /* CONFIG_GPIOLIB && CONFIG_GPIO_SYSFS */
+
++static inline int _gpiod_export(struct gpio_desc *desc,
++ bool direction_may_change,
++ const char *name)
++{
++ return -ENOSYS;
++}
++
+ static inline int gpiod_export(struct gpio_desc *desc,
+ bool direction_may_change)
+ {
diff --git a/target/linux/ramips/patches-5.4/0025-pinctrl-ralink-add-pinctrl-driver.patch b/target/linux/ramips/patches-5.4/0025-pinctrl-ralink-add-pinctrl-driver.patch
new file mode 100644
index 00000000000..a374e01b593
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0025-pinctrl-ralink-add-pinctrl-driver.patch
@@ -0,0 +1,524 @@
+From 7adbe9a88c33c6e362a10b109d963b5500a21f00 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 27 Jul 2014 09:34:05 +0100
+Subject: [PATCH 25/53] pinctrl: ralink: add pinctrl driver
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/Kconfig | 2 +
+ drivers/pinctrl/Kconfig | 5 +
+ drivers/pinctrl/Makefile | 1 +
+ drivers/pinctrl/pinctrl-rt2880.c | 474 ++++++++++++++++++++++++++++++++++++++
+ 4 files changed, 482 insertions(+)
+ create mode 100644 drivers/pinctrl/pinctrl-rt2880.c
+
+--- a/arch/mips/Kconfig
++++ b/arch/mips/Kconfig
+@@ -629,6 +629,8 @@ config RALINK
+ select CLKDEV_LOOKUP
+ select ARCH_HAS_RESET_CONTROLLER
+ select RESET_CONTROLLER
++ select PINCTRL
++ select PINCTRL_RT2880
+
+ config SGI_IP22
+ bool "SGI IP22 (Indy/Indigo2)"
+--- a/drivers/pinctrl/Kconfig
++++ b/drivers/pinctrl/Kconfig
+@@ -143,6 +143,11 @@ config PINCTRL_LPC18XX
+ help
+ Pinctrl driver for NXP LPC18xx/43xx System Control Unit (SCU).
+
++config PINCTRL_RT2880
++ bool
++ depends on RALINK
++ select PINMUX
++
+ config PINCTRL_FALCON
+ bool
+ depends on SOC_FALCON
+--- a/drivers/pinctrl/Makefile
++++ b/drivers/pinctrl/Makefile
+@@ -28,6 +28,7 @@ obj-$(CONFIG_PINCTRL_PALMAS) += pinctrl-
+ obj-$(CONFIG_PINCTRL_PIC32) += pinctrl-pic32.o
+ obj-$(CONFIG_PINCTRL_PISTACHIO) += pinctrl-pistachio.o
+ obj-$(CONFIG_PINCTRL_ROCKCHIP) += pinctrl-rockchip.o
++obj-$(CONFIG_PINCTRL_RT2880) += pinctrl-rt2880.o
+ obj-$(CONFIG_PINCTRL_RZA1) += pinctrl-rza1.o
+ obj-$(CONFIG_PINCTRL_SINGLE) += pinctrl-single.o
+ obj-$(CONFIG_PINCTRL_SIRF) += sirf/
+--- /dev/null
++++ b/drivers/pinctrl/pinctrl-rt2880.c
+@@ -0,0 +1,472 @@
++/*
++ * linux/drivers/pinctrl/pinctrl-rt2880.c
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * publishhed by the Free Software Foundation.
++ *
++ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/module.h>
++#include <linux/device.h>
++#include <linux/io.h>
++#include <linux/platform_device.h>
++#include <linux/slab.h>
++#include <linux/of.h>
++#include <linux/pinctrl/pinctrl.h>
++#include <linux/pinctrl/pinconf.h>
++#include <linux/pinctrl/pinmux.h>
++#include <linux/pinctrl/consumer.h>
++#include <linux/pinctrl/machine.h>
++
++#include <asm/mach-ralink/ralink_regs.h>
++#include <asm/mach-ralink/pinmux.h>
++#include <asm/mach-ralink/mt7620.h>
++
++#include "core.h"
++
++#define SYSC_REG_GPIO_MODE 0x60
++#define SYSC_REG_GPIO_MODE2 0x64
++
++struct rt2880_priv {
++ struct device *dev;
++
++ struct pinctrl_pin_desc *pads;
++ struct pinctrl_desc *desc;
++
++ struct rt2880_pmx_func **func;
++ int func_count;
++
++ struct rt2880_pmx_group *groups;
++ const char **group_names;
++ int group_count;
++
++ uint8_t *gpio;
++ int max_pins;
++};
++
++static int rt2880_get_group_count(struct pinctrl_dev *pctrldev)
++{
++ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
++
++ return p->group_count;
++}
++
++static const char *rt2880_get_group_name(struct pinctrl_dev *pctrldev,
++ unsigned group)
++{
++ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
++
++ if (group >= p->group_count)
++ return NULL;
++
++ return p->group_names[group];
++}
++
++static int rt2880_get_group_pins(struct pinctrl_dev *pctrldev,
++ unsigned group,
++ const unsigned **pins,
++ unsigned *num_pins)
++{
++ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
++
++ if (group >= p->group_count)
++ return -EINVAL;
++
++ *pins = p->groups[group].func[0].pins;
++ *num_pins = p->groups[group].func[0].pin_count;
++
++ return 0;
++}
++
++static void rt2880_pinctrl_dt_free_map(struct pinctrl_dev *pctrldev,
++ struct pinctrl_map *map, unsigned num_maps)
++{
++ int i;
++
++ for (i = 0; i < num_maps; i++)
++ if (map[i].type == PIN_MAP_TYPE_CONFIGS_PIN ||
++ map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
++ kfree(map[i].data.configs.configs);
++ kfree(map);
++}
++
++static void rt2880_pinctrl_pin_dbg_show(struct pinctrl_dev *pctrldev,
++ struct seq_file *s,
++ unsigned offset)
++{
++ seq_printf(s, "ralink pio");
++}
++
++static void rt2880_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctrldev,
++ struct device_node *np,
++ struct pinctrl_map **map)
++{
++ const char *function;
++ int func = of_property_read_string(np, "ralink,function", &function);
++ int grps = of_property_count_strings(np, "ralink,group");
++ int i;
++
++ if (func || !grps)
++ return;
++
++ for (i = 0; i < grps; i++) {
++ const char *group;
++
++ of_property_read_string_index(np, "ralink,group", i, &group);
++
++ (*map)->type = PIN_MAP_TYPE_MUX_GROUP;
++ (*map)->name = function;
++ (*map)->data.mux.group = group;
++ (*map)->data.mux.function = function;
++ (*map)++;
++ }
++}
++
++static int rt2880_pinctrl_dt_node_to_map(struct pinctrl_dev *pctrldev,
++ struct device_node *np_config,
++ struct pinctrl_map **map,
++ unsigned *num_maps)
++{
++ int max_maps = 0;
++ struct pinctrl_map *tmp;
++ struct device_node *np;
++
++ for_each_child_of_node(np_config, np) {
++ int ret = of_property_count_strings(np, "ralink,group");
++
++ if (ret >= 0)
++ max_maps += ret;
++ }
++
++ if (!max_maps)
++ return -EINVAL;
++
++ *map = kzalloc(max_maps * sizeof(struct pinctrl_map), GFP_KERNEL);
++ if (!*map)
++ return -ENOMEM;
++
++ tmp = *map;
++
++ for_each_child_of_node(np_config, np)
++ rt2880_pinctrl_dt_subnode_to_map(pctrldev, np, &tmp);
++ *num_maps = max_maps;
++
++ return 0;
++}
++
++static const struct pinctrl_ops rt2880_pctrl_ops = {
++ .get_groups_count = rt2880_get_group_count,
++ .get_group_name = rt2880_get_group_name,
++ .get_group_pins = rt2880_get_group_pins,
++ .pin_dbg_show = rt2880_pinctrl_pin_dbg_show,
++ .dt_node_to_map = rt2880_pinctrl_dt_node_to_map,
++ .dt_free_map = rt2880_pinctrl_dt_free_map,
++};
++
++static int rt2880_pmx_func_count(struct pinctrl_dev *pctrldev)
++{
++ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
++
++ return p->func_count;
++}
++
++static const char *rt2880_pmx_func_name(struct pinctrl_dev *pctrldev,
++ unsigned func)
++{
++ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
++
++ return p->func[func]->name;
++}
++
++static int rt2880_pmx_group_get_groups(struct pinctrl_dev *pctrldev,
++ unsigned func,
++ const char * const **groups,
++ unsigned * const num_groups)
++{
++ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
++
++ if (p->func[func]->group_count == 1)
++ *groups = &p->group_names[p->func[func]->groups[0]];
++ else
++ *groups = p->group_names;
++
++ *num_groups = p->func[func]->group_count;
++
++ return 0;
++}
++
++static int rt2880_pmx_group_enable(struct pinctrl_dev *pctrldev,
++ unsigned func,
++ unsigned group)
++{
++ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
++ u32 mode = 0;
++ u32 reg = SYSC_REG_GPIO_MODE;
++ int i;
++ int shift;
++
++ /* dont allow double use */
++ if (p->groups[group].enabled) {
++ dev_err(p->dev, "%s is already enabled\n", p->groups[group].name);
++ return -EBUSY;
++ }
++
++ p->groups[group].enabled = 1;
++ p->func[func]->enabled = 1;
++
++ shift = p->groups[group].shift;
++ if (shift >= 32) {
++ shift -= 32;
++ reg = SYSC_REG_GPIO_MODE2;
++ }
++ mode = rt_sysc_r32(reg);
++ mode &= ~(p->groups[group].mask << shift);
++
++ /* mark the pins as gpio */
++ for (i = 0; i < p->groups[group].func[0].pin_count; i++)
++ p->gpio[p->groups[group].func[0].pins[i]] = 1;
++
++ /* function 0 is gpio and needs special handling */
++ if (func == 0) {
++ mode |= p->groups[group].gpio << shift;
++ } else {
++ for (i = 0; i < p->func[func]->pin_count; i++)
++ p->gpio[p->func[func]->pins[i]] = 0;
++ mode |= p->func[func]->value << shift;
++ }
++ rt_sysc_w32(mode, reg);
++
++ return 0;
++}
++
++static int rt2880_pmx_group_gpio_request_enable(struct pinctrl_dev *pctrldev,
++ struct pinctrl_gpio_range *range,
++ unsigned pin)
++{
++ struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
++
++ if (!p->gpio[pin]) {
++ dev_err(p->dev, "pin %d is not set to gpio mux\n", pin);
++ return -EINVAL;
++ }
++
++ return 0;
++}
++
++static const struct pinmux_ops rt2880_pmx_group_ops = {
++ .get_functions_count = rt2880_pmx_func_count,
++ .get_function_name = rt2880_pmx_func_name,
++ .get_function_groups = rt2880_pmx_group_get_groups,
++ .set_mux = rt2880_pmx_group_enable,
++ .gpio_request_enable = rt2880_pmx_group_gpio_request_enable,
++};
++
++static struct pinctrl_desc rt2880_pctrl_desc = {
++ .owner = THIS_MODULE,
++ .name = "rt2880-pinmux",
++ .pctlops = &rt2880_pctrl_ops,
++ .pmxops = &rt2880_pmx_group_ops,
++};
++
++static struct rt2880_pmx_func gpio_func = {
++ .name = "gpio",
++};
++
++static int rt2880_pinmux_index(struct rt2880_priv *p)
++{
++ struct rt2880_pmx_func **f;
++ struct rt2880_pmx_group *mux = p->groups;
++ int i, j, c = 0;
++
++ /* count the mux functions */
++ while (mux->name) {
++ p->group_count++;
++ mux++;
++ }
++
++ /* allocate the group names array needed by the gpio function */
++ p->group_names = devm_kzalloc(p->dev, sizeof(char *) * p->group_count, GFP_KERNEL);
++ if (!p->group_names)
++ return -1;
++
++ for (i = 0; i < p->group_count; i++) {
++ p->group_names[i] = p->groups[i].name;
++ p->func_count += p->groups[i].func_count;
++ }
++
++ /* we have a dummy function[0] for gpio */
++ p->func_count++;
++
++ /* allocate our function and group mapping index buffers */
++ f = p->func = devm_kzalloc(p->dev, sizeof(struct rt2880_pmx_func) * p->func_count, GFP_KERNEL);
++ gpio_func.groups = devm_kzalloc(p->dev, sizeof(int) * p->group_count, GFP_KERNEL);
++ if (!f || !gpio_func.groups)
++ return -1;
++
++ /* add a backpointer to the function so it knows its group */
++ gpio_func.group_count = p->group_count;
++ for (i = 0; i < gpio_func.group_count; i++)
++ gpio_func.groups[i] = i;
++
++ f[c] = &gpio_func;
++ c++;
++
++ /* add remaining functions */
++ for (i = 0; i < p->group_count; i++) {
++ for (j = 0; j < p->groups[i].func_count; j++) {
++ f[c] = &p->groups[i].func[j];
++ f[c]->groups = devm_kzalloc(p->dev, sizeof(int), GFP_KERNEL);
++ f[c]->groups[0] = i;
++ f[c]->group_count = 1;
++ c++;
++ }
++ }
++ return 0;
++}
++
++static int rt2880_pinmux_pins(struct rt2880_priv *p)
++{
++ int i, j;
++
++ /* loop over the functions and initialize the pins array. also work out the highest pin used */
++ for (i = 0; i < p->func_count; i++) {
++ int pin;
++
++ if (!p->func[i]->pin_count)
++ continue;
++
++ p->func[i]->pins = devm_kzalloc(p->dev, sizeof(int) * p->func[i]->pin_count, GFP_KERNEL);
++ for (j = 0; j < p->func[i]->pin_count; j++)
++ p->func[i]->pins[j] = p->func[i]->pin_first + j;
++
++ pin = p->func[i]->pin_first + p->func[i]->pin_count;
++ if (pin > p->max_pins)
++ p->max_pins = pin;
++ }
++
++ /* the buffer that tells us which pins are gpio */
++ p->gpio = devm_kzalloc(p->dev,sizeof(uint8_t) * p->max_pins,
++ GFP_KERNEL);
++ /* the pads needed to tell pinctrl about our pins */
++ p->pads = devm_kzalloc(p->dev,
++ sizeof(struct pinctrl_pin_desc) * p->max_pins,
++ GFP_KERNEL);
++ if (!p->pads || !p->gpio ) {
++ dev_err(p->dev, "Failed to allocate gpio data\n");
++ return -ENOMEM;
++ }
++
++ memset(p->gpio, 1, sizeof(uint8_t) * p->max_pins);
++ for (i = 0; i < p->func_count; i++) {
++ if (!p->func[i]->pin_count)
++ continue;
++
++ for (j = 0; j < p->func[i]->pin_count; j++)
++ p->gpio[p->func[i]->pins[j]] = 0;
++ }
++
++ /* pin 0 is always a gpio */
++ p->gpio[0] = 1;
++
++ /* set the pads */
++ for (i = 0; i < p->max_pins; i++) {
++ /* strlen("ioXY") + 1 = 5 */
++ char *name = devm_kzalloc(p->dev, 5, GFP_KERNEL);
++
++ if (!name) {
++ dev_err(p->dev, "Failed to allocate pad name\n");
++ return -ENOMEM;
++ }
++ snprintf(name, 5, "io%d", i);
++ p->pads[i].number = i;
++ p->pads[i].name = name;
++ }
++ p->desc->pins = p->pads;
++ p->desc->npins = p->max_pins;
++
++ return 0;
++}
++
++static int rt2880_pinmux_probe(struct platform_device *pdev)
++{
++ struct rt2880_priv *p;
++ struct pinctrl_dev *dev;
++ struct device_node *np;
++
++ if (!rt2880_pinmux_data)
++ return -ENOSYS;
++
++ /* setup the private data */
++ p = devm_kzalloc(&pdev->dev, sizeof(struct rt2880_priv), GFP_KERNEL);
++ if (!p)
++ return -ENOMEM;
++
++ p->dev = &pdev->dev;
++ p->desc = &rt2880_pctrl_desc;
++ p->groups = rt2880_pinmux_data;
++ platform_set_drvdata(pdev, p);
++
++ /* init the device */
++ if (rt2880_pinmux_index(p)) {
++ dev_err(&pdev->dev, "failed to load index\n");
++ return -EINVAL;
++ }
++ if (rt2880_pinmux_pins(p)) {
++ dev_err(&pdev->dev, "failed to load pins\n");
++ return -EINVAL;
++ }
++ dev = pinctrl_register(p->desc, &pdev->dev, p);
++ if (IS_ERR(dev))
++ return PTR_ERR(dev);
++
++ /* finalize by adding gpio ranges for enables gpio controllers */
++ for_each_compatible_node(np, NULL, "ralink,rt2880-gpio") {
++ const __be32 *ngpio, *gpiobase;
++ struct pinctrl_gpio_range *range;
++ char *name;
++
++ if (!of_device_is_available(np))
++ continue;
++
++ ngpio = of_get_property(np, "ralink,nr-gpio", NULL);
++ gpiobase = of_get_property(np, "ralink,gpio-base", NULL);
++ if (!ngpio || !gpiobase) {
++ dev_err(&pdev->dev, "failed to load chip info\n");
++ return -EINVAL;
++ }
++
++ range = devm_kzalloc(p->dev, sizeof(struct pinctrl_gpio_range) + 4, GFP_KERNEL);
++ range->name = name = (char *) &range[1];
++ sprintf(name, "pio");
++ range->npins = __be32_to_cpu(*ngpio);
++ range->base = __be32_to_cpu(*gpiobase);
++ range->pin_base = range->base;
++ pinctrl_add_gpio_range(dev, range);
++ }
++
++ return 0;
++}
++
++static const struct of_device_id rt2880_pinmux_match[] = {
++ { .compatible = "ralink,rt2880-pinmux" },
++ {},
++};
++MODULE_DEVICE_TABLE(of, rt2880_pinmux_match);
++
++static struct platform_driver rt2880_pinmux_driver = {
++ .probe = rt2880_pinmux_probe,
++ .driver = {
++ .name = "rt2880-pinmux",
++ .owner = THIS_MODULE,
++ .of_match_table = rt2880_pinmux_match,
++ },
++};
++
++int __init rt2880_pinmux_init(void)
++{
++ return platform_driver_register(&rt2880_pinmux_driver);
++}
++
++core_initcall_sync(rt2880_pinmux_init);
diff --git a/target/linux/ramips/patches-5.4/0026-DT-Add-documentation-for-gpio-ralink.patch b/target/linux/ramips/patches-5.4/0026-DT-Add-documentation-for-gpio-ralink.patch
new file mode 100644
index 00000000000..0bce0b433a9
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0026-DT-Add-documentation-for-gpio-ralink.patch
@@ -0,0 +1,59 @@
+From d410e5478c622c01fcf31427533df5f433df9146 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 28 Jul 2013 19:45:30 +0200
+Subject: [PATCH 26/53] DT: Add documentation for gpio-ralink
+
+Describe gpio-ralink binding.
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+Cc: linux-mips@linux-mips.org
+Cc: devicetree@vger.kernel.org
+Cc: linux-gpio@vger.kernel.org
+---
+ .../devicetree/bindings/gpio/gpio-ralink.txt | 40 ++++++++++++++++++++
+ 1 file changed, 40 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/gpio/gpio-ralink.txt
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/gpio/gpio-ralink.txt
+@@ -0,0 +1,40 @@
++Ralink SoC GPIO controller bindings
++
++Required properties:
++- compatible:
++ - "ralink,rt2880-gpio" for Ralink controllers
++- #gpio-cells : Should be two.
++ - first cell is the pin number
++ - second cell is used to specify optional parameters (unused)
++- gpio-controller : Marks the device node as a GPIO controller
++- reg : Physical base address and length of the controller's registers
++- interrupt-parent: phandle to the INTC device node
++- interrupts : Specify the INTC interrupt number
++- ralink,nr-gpio : Specify the number of GPIOs
++- ralink,register-map : The register layout depends on the GPIO bank and actual
++ SoC type. Register offsets need to be in this order.
++ [ INT, EDGE, RENA, FENA, DATA, DIR, POL, SET, RESET, TOGGLE ]
++
++Optional properties:
++- ralink,gpio-base : Specify the GPIO chips base number
++
++Example:
++
++ gpio0: gpio@600 {
++ compatible = "ralink,rt5350-gpio", "ralink,rt2880-gpio";
++
++ #gpio-cells = <2>;
++ gpio-controller;
++
++ reg = <0x600 0x34>;
++
++ interrupt-parent = <&intc>;
++ interrupts = <6>;
++
++ ralink,gpio-base = <0>;
++ ralink,nr-gpio = <24>;
++ ralink,register-map = [ 00 04 08 0c
++ 20 24 28 2c
++ 30 34 ];
++
++ };
diff --git a/target/linux/ramips/patches-5.4/0027-GPIO-MIPS-ralink-add-gpio-driver-for-ralink-SoC.patch b/target/linux/ramips/patches-5.4/0027-GPIO-MIPS-ralink-add-gpio-driver-for-ralink-SoC.patch
new file mode 100644
index 00000000000..eaae0d3d02f
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0027-GPIO-MIPS-ralink-add-gpio-driver-for-ralink-SoC.patch
@@ -0,0 +1,430 @@
+From 69fdd2c4f937796b934e89c33acde9d082e27bfd Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Mon, 4 Aug 2014 20:36:29 +0200
+Subject: [PATCH 27/53] GPIO: MIPS: ralink: add gpio driver for ralink SoC
+
+Add gpio driver for Ralink SoC. This driver makes the gpio core on
+RT2880, RT305x, rt3352, rt3662, rt3883, rt5350 and mt7620 work.
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+Cc: linux-mips@linux-mips.org
+Cc: linux-gpio@vger.kernel.org
+---
+ arch/mips/include/asm/mach-ralink/gpio.h | 24 ++
+ drivers/gpio/Kconfig | 6 +
+ drivers/gpio/Makefile | 1 +
+ drivers/gpio/gpio-ralink.c | 355 ++++++++++++++++++++++++++++++
+ 4 files changed, 386 insertions(+)
+ create mode 100644 arch/mips/include/asm/mach-ralink/gpio.h
+ create mode 100644 drivers/gpio/gpio-ralink.c
+
+--- /dev/null
++++ b/arch/mips/include/asm/mach-ralink/gpio.h
+@@ -0,0 +1,24 @@
++/*
++ * Ralink SoC GPIO API support
++ *
++ * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
++ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation.
++ *
++ */
++
++#ifndef __ASM_MACH_RALINK_GPIO_H
++#define __ASM_MACH_RALINK_GPIO_H
++
++#define ARCH_NR_GPIOS 128
++#include <asm-generic/gpio.h>
++
++#define gpio_get_value __gpio_get_value
++#define gpio_set_value __gpio_set_value
++#define gpio_cansleep __gpio_cansleep
++#define gpio_to_irq __gpio_to_irq
++
++#endif /* __ASM_MACH_RALINK_GPIO_H */
+--- a/drivers/gpio/Kconfig
++++ b/drivers/gpio/Kconfig
+@@ -398,6 +398,12 @@ config GPIO_REG
+ A 32-bit single register GPIO fixed in/out implementation. This
+ can be used to represent any register as a set of GPIO signals.
+
++config GPIO_RALINK
++ bool "Ralink GPIO Support"
++ depends on RALINK
++ help
++ Say yes here to support the Ralink SoC GPIO device
++
+ config GPIO_SPEAR_SPICS
+ bool "ST SPEAr13xx SPI Chip Select as GPIO support"
+ depends on PLAT_SPEAR
+--- a/drivers/gpio/Makefile
++++ b/drivers/gpio/Makefile
+@@ -98,6 +98,7 @@ obj-$(CONFIG_GPIO_PCI_IDIO_16) += gpio-p
+ obj-$(CONFIG_GPIO_PISOSR) += gpio-pisosr.o
+ obj-$(CONFIG_GPIO_PL061) += gpio-pl061.o
+ obj-$(CONFIG_GPIO_PXA) += gpio-pxa.o
++obj-$(CONFIG_GPIO_RALINK) += gpio-ralink.o
+ obj-$(CONFIG_GPIO_RC5T583) += gpio-rc5t583.o
+ obj-$(CONFIG_GPIO_RDC321X) += gpio-rdc321x.o
+ obj-$(CONFIG_GPIO_RCAR) += gpio-rcar.o
+--- /dev/null
++++ b/drivers/gpio/gpio-ralink.c
+@@ -0,0 +1,355 @@
++/*
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation.
++ *
++ * Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org>
++ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/module.h>
++#include <linux/io.h>
++#include <linux/gpio.h>
++#include <linux/spinlock.h>
++#include <linux/platform_device.h>
++#include <linux/of_irq.h>
++#include <linux/irqdomain.h>
++#include <linux/interrupt.h>
++
++enum ralink_gpio_reg {
++ GPIO_REG_INT = 0,
++ GPIO_REG_EDGE,
++ GPIO_REG_RENA,
++ GPIO_REG_FENA,
++ GPIO_REG_DATA,
++ GPIO_REG_DIR,
++ GPIO_REG_POL,
++ GPIO_REG_SET,
++ GPIO_REG_RESET,
++ GPIO_REG_TOGGLE,
++ GPIO_REG_MAX
++};
++
++struct ralink_gpio_chip {
++ struct gpio_chip chip;
++ u8 regs[GPIO_REG_MAX];
++
++ spinlock_t lock;
++ void __iomem *membase;
++ struct irq_domain *domain;
++ int irq;
++
++ u32 rising;
++ u32 falling;
++};
++
++#define MAP_MAX 4
++static struct irq_domain *irq_map[MAP_MAX];
++static int irq_map_count;
++static atomic_t irq_refcount = ATOMIC_INIT(0);
++
++static inline struct ralink_gpio_chip *to_ralink_gpio(struct gpio_chip *chip)
++{
++ struct ralink_gpio_chip *rg;
++
++ rg = container_of(chip, struct ralink_gpio_chip, chip);
++
++ return rg;
++}
++
++static inline void rt_gpio_w32(struct ralink_gpio_chip *rg, u8 reg, u32 val)
++{
++ iowrite32(val, rg->membase + rg->regs[reg]);
++}
++
++static inline u32 rt_gpio_r32(struct ralink_gpio_chip *rg, u8 reg)
++{
++ return ioread32(rg->membase + rg->regs[reg]);
++}
++
++static void ralink_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
++{
++ struct ralink_gpio_chip *rg = to_ralink_gpio(chip);
++
++ rt_gpio_w32(rg, (value) ? GPIO_REG_SET : GPIO_REG_RESET, BIT(offset));
++}
++
++static int ralink_gpio_get(struct gpio_chip *chip, unsigned offset)
++{
++ struct ralink_gpio_chip *rg = to_ralink_gpio(chip);
++
++ return !!(rt_gpio_r32(rg, GPIO_REG_DATA) & BIT(offset));
++}
++
++static int ralink_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
++{
++ struct ralink_gpio_chip *rg = to_ralink_gpio(chip);
++ unsigned long flags;
++ u32 t;
++
++ spin_lock_irqsave(&rg->lock, flags);
++ t = rt_gpio_r32(rg, GPIO_REG_DIR);
++ t &= ~BIT(offset);
++ rt_gpio_w32(rg, GPIO_REG_DIR, t);
++ spin_unlock_irqrestore(&rg->lock, flags);
++
++ return 0;
++}
++
++static int ralink_gpio_direction_output(struct gpio_chip *chip,
++ unsigned offset, int value)
++{
++ struct ralink_gpio_chip *rg = to_ralink_gpio(chip);
++ unsigned long flags;
++ u32 t;
++
++ spin_lock_irqsave(&rg->lock, flags);
++ ralink_gpio_set(chip, offset, value);
++ t = rt_gpio_r32(rg, GPIO_REG_DIR);
++ t |= BIT(offset);
++ rt_gpio_w32(rg, GPIO_REG_DIR, t);
++ spin_unlock_irqrestore(&rg->lock, flags);
++
++ return 0;
++}
++
++static int ralink_gpio_to_irq(struct gpio_chip *chip, unsigned pin)
++{
++ struct ralink_gpio_chip *rg = to_ralink_gpio(chip);
++
++ if (rg->irq < 1)
++ return -1;
++
++ return irq_create_mapping(rg->domain, pin);
++}
++
++static void ralink_gpio_irq_handler(struct irq_desc *desc)
++{
++ int i;
++
++ for (i = 0; i < irq_map_count; i++) {
++ struct irq_domain *domain = irq_map[i];
++ struct ralink_gpio_chip *rg;
++ unsigned long pending;
++ int bit;
++
++ rg = (struct ralink_gpio_chip *) domain->host_data;
++ pending = rt_gpio_r32(rg, GPIO_REG_INT);
++
++ for_each_set_bit(bit, &pending, rg->chip.ngpio) {
++ u32 map = irq_find_mapping(domain, bit);
++ generic_handle_irq(map);
++ rt_gpio_w32(rg, GPIO_REG_INT, BIT(bit));
++ }
++ }
++}
++
++static void ralink_gpio_irq_unmask(struct irq_data *d)
++{
++ struct ralink_gpio_chip *rg;
++ unsigned long flags;
++ u32 rise, fall;
++
++ rg = (struct ralink_gpio_chip *) d->domain->host_data;
++ rise = rt_gpio_r32(rg, GPIO_REG_RENA);
++ fall = rt_gpio_r32(rg, GPIO_REG_FENA);
++
++ spin_lock_irqsave(&rg->lock, flags);
++ rt_gpio_w32(rg, GPIO_REG_RENA, rise | (BIT(d->hwirq) & rg->rising));
++ rt_gpio_w32(rg, GPIO_REG_FENA, fall | (BIT(d->hwirq) & rg->falling));
++ spin_unlock_irqrestore(&rg->lock, flags);
++}
++
++static void ralink_gpio_irq_mask(struct irq_data *d)
++{
++ struct ralink_gpio_chip *rg;
++ unsigned long flags;
++ u32 rise, fall;
++
++ rg = (struct ralink_gpio_chip *) d->domain->host_data;
++ rise = rt_gpio_r32(rg, GPIO_REG_RENA);
++ fall = rt_gpio_r32(rg, GPIO_REG_FENA);
++
++ spin_lock_irqsave(&rg->lock, flags);
++ rt_gpio_w32(rg, GPIO_REG_FENA, fall & ~BIT(d->hwirq));
++ rt_gpio_w32(rg, GPIO_REG_RENA, rise & ~BIT(d->hwirq));
++ spin_unlock_irqrestore(&rg->lock, flags);
++}
++
++static int ralink_gpio_irq_type(struct irq_data *d, unsigned int type)
++{
++ struct ralink_gpio_chip *rg;
++ u32 mask = BIT(d->hwirq);
++
++ rg = (struct ralink_gpio_chip *) d->domain->host_data;
++
++ if (type == IRQ_TYPE_PROBE) {
++ if ((rg->rising | rg->falling) & mask)
++ return 0;
++
++ type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
++ }
++
++ if (type & IRQ_TYPE_EDGE_RISING)
++ rg->rising |= mask;
++ else
++ rg->rising &= ~mask;
++
++ if (type & IRQ_TYPE_EDGE_FALLING)
++ rg->falling |= mask;
++ else
++ rg->falling &= ~mask;
++
++ return 0;
++}
++
++static struct irq_chip ralink_gpio_irq_chip = {
++ .name = "GPIO",
++ .irq_unmask = ralink_gpio_irq_unmask,
++ .irq_mask = ralink_gpio_irq_mask,
++ .irq_mask_ack = ralink_gpio_irq_mask,
++ .irq_set_type = ralink_gpio_irq_type,
++};
++
++static int gpio_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
++{
++ irq_set_chip_and_handler(irq, &ralink_gpio_irq_chip, handle_level_irq);
++ irq_set_handler_data(irq, d);
++
++ return 0;
++}
++
++static const struct irq_domain_ops irq_domain_ops = {
++ .xlate = irq_domain_xlate_onecell,
++ .map = gpio_map,
++};
++
++static void ralink_gpio_irq_init(struct device_node *np,
++ struct ralink_gpio_chip *rg)
++{
++ if (irq_map_count >= MAP_MAX)
++ return;
++
++ rg->irq = irq_of_parse_and_map(np, 0);
++ if (!rg->irq)
++ return;
++
++ rg->domain = irq_domain_add_linear(np, rg->chip.ngpio,
++ &irq_domain_ops, rg);
++ if (!rg->domain) {
++ dev_err(rg->chip.parent, "irq_domain_add_linear failed\n");
++ return;
++ }
++
++ irq_map[irq_map_count++] = rg->domain;
++
++ rt_gpio_w32(rg, GPIO_REG_RENA, 0x0);
++ rt_gpio_w32(rg, GPIO_REG_FENA, 0x0);
++
++ if (!atomic_read(&irq_refcount))
++ irq_set_chained_handler(rg->irq, ralink_gpio_irq_handler);
++ atomic_inc(&irq_refcount);
++
++ dev_info(rg->chip.parent, "registering %d irq handlers\n", rg->chip.ngpio);
++}
++
++static int ralink_gpio_request(struct gpio_chip *chip, unsigned offset)
++{
++ int gpio = chip->base + offset;
++
++ return pinctrl_request_gpio(gpio);
++}
++
++static void ralink_gpio_free(struct gpio_chip *chip, unsigned offset)
++{
++ int gpio = chip->base + offset;
++
++ pinctrl_free_gpio(gpio);
++}
++
++static int ralink_gpio_probe(struct platform_device *pdev)
++{
++ struct device_node *np = pdev->dev.of_node;
++ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ struct ralink_gpio_chip *rg;
++ const __be32 *ngpio, *gpiobase;
++
++ if (!res) {
++ dev_err(&pdev->dev, "failed to find resource\n");
++ return -ENOMEM;
++ }
++
++ rg = devm_kzalloc(&pdev->dev,
++ sizeof(struct ralink_gpio_chip), GFP_KERNEL);
++ if (!rg)
++ return -ENOMEM;
++
++ rg->membase = devm_ioremap_resource(&pdev->dev, res);
++ if (!rg->membase) {
++ dev_err(&pdev->dev, "cannot remap I/O memory region\n");
++ return -ENOMEM;
++ }
++
++ if (of_property_read_u8_array(np, "ralink,register-map",
++ rg->regs, GPIO_REG_MAX)) {
++ dev_err(&pdev->dev, "failed to read register definition\n");
++ return -EINVAL;
++ }
++
++ ngpio = of_get_property(np, "ralink,nr-gpio", NULL);
++ if (!ngpio) {
++ dev_err(&pdev->dev, "failed to read number of pins\n");
++ return -EINVAL;
++ }
++
++ gpiobase = of_get_property(np, "ralink,gpio-base", NULL);
++ if (gpiobase)
++ rg->chip.base = be32_to_cpu(*gpiobase);
++ else
++ rg->chip.base = -1;
++
++ spin_lock_init(&rg->lock);
++
++ rg->chip.parent = &pdev->dev;
++ rg->chip.label = dev_name(&pdev->dev);
++ rg->chip.of_node = np;
++ rg->chip.ngpio = be32_to_cpu(*ngpio);
++ rg->chip.direction_input = ralink_gpio_direction_input;
++ rg->chip.direction_output = ralink_gpio_direction_output;
++ rg->chip.get = ralink_gpio_get;
++ rg->chip.set = ralink_gpio_set;
++ rg->chip.request = ralink_gpio_request;
++ rg->chip.to_irq = ralink_gpio_to_irq;
++ rg->chip.free = ralink_gpio_free;
++
++ /* set polarity to low for all lines */
++ rt_gpio_w32(rg, GPIO_REG_POL, 0);
++
++ dev_info(&pdev->dev, "registering %d gpios\n", rg->chip.ngpio);
++
++ ralink_gpio_irq_init(np, rg);
++
++ return gpiochip_add(&rg->chip);
++}
++
++static const struct of_device_id ralink_gpio_match[] = {
++ { .compatible = "ralink,rt2880-gpio" },
++ {},
++};
++MODULE_DEVICE_TABLE(of, ralink_gpio_match);
++
++static struct platform_driver ralink_gpio_driver = {
++ .probe = ralink_gpio_probe,
++ .driver = {
++ .name = "rt2880_gpio",
++ .owner = THIS_MODULE,
++ .of_match_table = ralink_gpio_match,
++ },
++};
++
++static int __init ralink_gpio_init(void)
++{
++ return platform_driver_register(&ralink_gpio_driver);
++}
++
++subsys_initcall(ralink_gpio_init);
diff --git a/target/linux/ramips/patches-5.4/0028-GPIO-ralink-add-mt7621-gpio-controller.patch b/target/linux/ramips/patches-5.4/0028-GPIO-ralink-add-mt7621-gpio-controller.patch
new file mode 100644
index 00000000000..debeae28060
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0028-GPIO-ralink-add-mt7621-gpio-controller.patch
@@ -0,0 +1,405 @@
+From 61ac7d9b4228de8c332900902c2b93189b042eab Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 27 Jul 2014 11:00:32 +0100
+Subject: [PATCH 28/53] GPIO: ralink: add mt7621 gpio controller
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/Kconfig | 3 +
+ drivers/gpio/Kconfig | 6 +
+ drivers/gpio/Makefile | 1 +
+ drivers/gpio/gpio-mt7621.c | 354 ++++++++++++++++++++++++++++++++++++++++++++
+ 4 files changed, 364 insertions(+)
+ create mode 100644 drivers/gpio/gpio-mt7621.c
+
+--- a/arch/mips/Kconfig
++++ b/arch/mips/Kconfig
+@@ -631,6 +631,9 @@ config RALINK
+ select RESET_CONTROLLER
+ select PINCTRL
+ select PINCTRL_RT2880
++ select ARCH_HAS_RESET_CONTROLLER
++ select RESET_CONTROLLER
++ select ARCH_REQUIRE_GPIOLIB
+
+ config SGI_IP22
+ bool "SGI IP22 (Indy/Indigo2)"
+--- a/drivers/gpio/Kconfig
++++ b/drivers/gpio/Kconfig
+@@ -298,6 +298,12 @@ config GPIO_MENZ127
+ help
+ Say yes here to support the MEN 16Z127 GPIO Controller
+
++config GPIO_MT7621
++ bool "Mediatek GPIO Support"
++ depends on SOC_MT7620 || SOC_MT7621
++ help
++ Say yes here to support the Mediatek SoC GPIO device
++
+ config GPIO_MM_LANTIQ
+ bool "Lantiq Memory mapped GPIOs"
+ depends on LANTIQ && SOC_XWAY
+--- a/drivers/gpio/Makefile
++++ b/drivers/gpio/Makefile
+@@ -152,3 +152,4 @@ obj-$(CONFIG_GPIO_ZEVIO) += gpio-zevio.o
+ obj-$(CONFIG_GPIO_ZYNQ) += gpio-zynq.o
+ obj-$(CONFIG_GPIO_ZX) += gpio-zx.o
+ obj-$(CONFIG_GPIO_LOONGSON1) += gpio-loongson1.o
++obj-$(CONFIG_GPIO_MT7621) += gpio-mt7621.o
+--- /dev/null
++++ b/drivers/gpio/gpio-mt7621.c
+@@ -0,0 +1,354 @@
++/*
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation.
++ *
++ * Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org>
++ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/io.h>
++#include <linux/err.h>
++#include <linux/gpio.h>
++#include <linux/module.h>
++#include <linux/of_irq.h>
++#include <linux/spinlock.h>
++#include <linux/irqdomain.h>
++#include <linux/interrupt.h>
++#include <linux/platform_device.h>
++
++#define MTK_MAX_BANK 3
++#define MTK_BANK_WIDTH 32
++
++enum mediatek_gpio_reg {
++ GPIO_REG_CTRL = 0,
++ GPIO_REG_POL,
++ GPIO_REG_DATA,
++ GPIO_REG_DSET,
++ GPIO_REG_DCLR,
++ GPIO_REG_REDGE,
++ GPIO_REG_FEDGE,
++ GPIO_REG_HLVL,
++ GPIO_REG_LLVL,
++ GPIO_REG_STAT,
++ GPIO_REG_EDGE,
++};
++
++static void __iomem *mediatek_gpio_membase;
++static int mediatek_gpio_irq;
++static struct irq_domain *mediatek_gpio_irq_domain;
++static atomic_t irq_refcount = ATOMIC_INIT(0);
++
++struct mtk_gc {
++ struct gpio_chip chip;
++ spinlock_t lock;
++ int bank;
++ u32 rising;
++ u32 falling;
++} *gc_map[MTK_MAX_BANK];
++
++static inline struct mtk_gc
++*to_mediatek_gpio(struct gpio_chip *chip)
++{
++ struct mtk_gc *mgc;
++
++ mgc = container_of(chip, struct mtk_gc, chip);
++
++ return mgc;
++}
++
++static inline void
++mtk_gpio_w32(struct mtk_gc *rg, u8 reg, u32 val)
++{
++ iowrite32(val, mediatek_gpio_membase + (reg * 0x10) + (rg->bank * 0x4));
++}
++
++static inline u32
++mtk_gpio_r32(struct mtk_gc *rg, u8 reg)
++{
++ return ioread32(mediatek_gpio_membase + (reg * 0x10) + (rg->bank * 0x4));
++}
++
++static void
++mediatek_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
++{
++ struct mtk_gc *rg = to_mediatek_gpio(chip);
++
++ mtk_gpio_w32(rg, (value) ? GPIO_REG_DSET : GPIO_REG_DCLR, BIT(offset));
++}
++
++static int
++mediatek_gpio_get(struct gpio_chip *chip, unsigned offset)
++{
++ struct mtk_gc *rg = to_mediatek_gpio(chip);
++
++ return !!(mtk_gpio_r32(rg, GPIO_REG_DATA) & BIT(offset));
++}
++
++static int
++mediatek_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
++{
++ struct mtk_gc *rg = to_mediatek_gpio(chip);
++ unsigned long flags;
++ u32 t;
++
++ spin_lock_irqsave(&rg->lock, flags);
++ t = mtk_gpio_r32(rg, GPIO_REG_CTRL);
++ t &= ~BIT(offset);
++ mtk_gpio_w32(rg, GPIO_REG_CTRL, t);
++ spin_unlock_irqrestore(&rg->lock, flags);
++
++ return 0;
++}
++
++static int
++mediatek_gpio_direction_output(struct gpio_chip *chip,
++ unsigned offset, int value)
++{
++ struct mtk_gc *rg = to_mediatek_gpio(chip);
++ unsigned long flags;
++ u32 t;
++
++ spin_lock_irqsave(&rg->lock, flags);
++ t = mtk_gpio_r32(rg, GPIO_REG_CTRL);
++ t |= BIT(offset);
++ mtk_gpio_w32(rg, GPIO_REG_CTRL, t);
++ mediatek_gpio_set(chip, offset, value);
++ spin_unlock_irqrestore(&rg->lock, flags);
++
++ return 0;
++}
++
++static int
++mediatek_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
++{
++ struct mtk_gc *rg = to_mediatek_gpio(chip);
++ unsigned long flags;
++ u32 t;
++
++ spin_lock_irqsave(&rg->lock, flags);
++ t = mtk_gpio_r32(rg, GPIO_REG_CTRL);
++ spin_unlock_irqrestore(&rg->lock, flags);
++
++ if (t & BIT(offset))
++ return 0;
++
++ return 1;
++}
++
++static int
++mediatek_gpio_to_irq(struct gpio_chip *chip, unsigned pin)
++{
++ struct mtk_gc *rg = to_mediatek_gpio(chip);
++
++ return irq_create_mapping(mediatek_gpio_irq_domain, pin + (rg->bank * MTK_BANK_WIDTH));
++}
++
++static int
++mediatek_gpio_bank_probe(struct platform_device *pdev, struct device_node *bank)
++{
++ const __be32 *id = of_get_property(bank, "reg", NULL);
++ struct mtk_gc *rg = devm_kzalloc(&pdev->dev,
++ sizeof(struct mtk_gc), GFP_KERNEL);
++
++ if (!rg || !id || be32_to_cpu(*id) > MTK_MAX_BANK)
++ return -ENOMEM;
++
++ gc_map[be32_to_cpu(*id)] = rg;
++
++ memset(rg, 0, sizeof(struct mtk_gc));
++
++ spin_lock_init(&rg->lock);
++
++ rg->chip.parent = &pdev->dev;
++ rg->chip.label = dev_name(&pdev->dev);
++ rg->chip.of_node = bank;
++ rg->chip.base = MTK_BANK_WIDTH * be32_to_cpu(*id);
++ rg->chip.ngpio = MTK_BANK_WIDTH;
++ rg->chip.direction_input = mediatek_gpio_direction_input;
++ rg->chip.direction_output = mediatek_gpio_direction_output;
++ rg->chip.get_direction = mediatek_gpio_get_direction;
++ rg->chip.get = mediatek_gpio_get;
++ rg->chip.set = mediatek_gpio_set;
++ if (mediatek_gpio_irq_domain)
++ rg->chip.to_irq = mediatek_gpio_to_irq;
++ rg->bank = be32_to_cpu(*id);
++
++ /* set polarity to low for all gpios */
++ mtk_gpio_w32(rg, GPIO_REG_POL, 0);
++
++ dev_info(&pdev->dev, "registering %d gpios\n", rg->chip.ngpio);
++
++ return gpiochip_add(&rg->chip);
++}
++
++static void
++mediatek_gpio_irq_handler(struct irq_desc *desc)
++{
++ int i;
++
++ for (i = 0; i < MTK_MAX_BANK; i++) {
++ struct mtk_gc *rg = gc_map[i];
++ unsigned long pending;
++ int bit;
++
++ if (!rg)
++ continue;
++
++ pending = mtk_gpio_r32(rg, GPIO_REG_STAT);
++
++ for_each_set_bit(bit, &pending, MTK_BANK_WIDTH) {
++ u32 map = irq_find_mapping(mediatek_gpio_irq_domain, (MTK_BANK_WIDTH * i) + bit);
++
++ generic_handle_irq(map);
++ mtk_gpio_w32(rg, GPIO_REG_STAT, BIT(bit));
++ }
++ }
++}
++
++static void
++mediatek_gpio_irq_unmask(struct irq_data *d)
++{
++ int pin = d->hwirq;
++ int bank = pin / 32;
++ struct mtk_gc *rg = gc_map[bank];
++ unsigned long flags;
++ u32 rise, fall;
++
++ if (!rg)
++ return;
++
++ rise = mtk_gpio_r32(rg, GPIO_REG_REDGE);
++ fall = mtk_gpio_r32(rg, GPIO_REG_FEDGE);
++
++ spin_lock_irqsave(&rg->lock, flags);
++ mtk_gpio_w32(rg, GPIO_REG_REDGE, rise | (BIT(d->hwirq) & rg->rising));
++ mtk_gpio_w32(rg, GPIO_REG_FEDGE, fall | (BIT(d->hwirq) & rg->falling));
++ spin_unlock_irqrestore(&rg->lock, flags);
++}
++
++static void
++mediatek_gpio_irq_mask(struct irq_data *d)
++{
++ int pin = d->hwirq;
++ int bank = pin / 32;
++ struct mtk_gc *rg = gc_map[bank];
++ unsigned long flags;
++ u32 rise, fall;
++
++ if (!rg)
++ return;
++
++ rise = mtk_gpio_r32(rg, GPIO_REG_REDGE);
++ fall = mtk_gpio_r32(rg, GPIO_REG_FEDGE);
++
++ spin_lock_irqsave(&rg->lock, flags);
++ mtk_gpio_w32(rg, GPIO_REG_FEDGE, fall & ~BIT(d->hwirq));
++ mtk_gpio_w32(rg, GPIO_REG_REDGE, rise & ~BIT(d->hwirq));
++ spin_unlock_irqrestore(&rg->lock, flags);
++}
++
++static int
++mediatek_gpio_irq_type(struct irq_data *d, unsigned int type)
++{
++ int pin = d->hwirq;
++ int bank = pin / 32;
++ struct mtk_gc *rg = gc_map[bank];
++ u32 mask = BIT(d->hwirq);
++
++ if (!rg)
++ return -1;
++
++ if (type == IRQ_TYPE_PROBE) {
++ if ((rg->rising | rg->falling) & mask)
++ return 0;
++
++ type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
++ }
++
++ if (type & IRQ_TYPE_EDGE_RISING)
++ rg->rising |= mask;
++ else
++ rg->rising &= ~mask;
++
++ if (type & IRQ_TYPE_EDGE_FALLING)
++ rg->falling |= mask;
++ else
++ rg->falling &= ~mask;
++
++ return 0;
++}
++
++static struct irq_chip mediatek_gpio_irq_chip = {
++ .name = "GPIO",
++ .irq_unmask = mediatek_gpio_irq_unmask,
++ .irq_mask = mediatek_gpio_irq_mask,
++ .irq_mask_ack = mediatek_gpio_irq_mask,
++ .irq_set_type = mediatek_gpio_irq_type,
++};
++
++static int
++mediatek_gpio_gpio_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
++{
++ irq_set_chip_and_handler(irq, &mediatek_gpio_irq_chip, handle_level_irq);
++ irq_set_handler_data(irq, d);
++
++ return 0;
++}
++
++static const struct irq_domain_ops irq_domain_ops = {
++ .xlate = irq_domain_xlate_onecell,
++ .map = mediatek_gpio_gpio_map,
++};
++
++static int
++mediatek_gpio_probe(struct platform_device *pdev)
++{
++ struct device_node *bank, *np = pdev->dev.of_node;
++ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++
++ mediatek_gpio_membase = devm_ioremap_resource(&pdev->dev, res);
++ if (IS_ERR(mediatek_gpio_membase))
++ return PTR_ERR(mediatek_gpio_membase);
++
++ mediatek_gpio_irq = irq_of_parse_and_map(np, 0);
++ if (mediatek_gpio_irq) {
++ mediatek_gpio_irq_domain = irq_domain_add_linear(np,
++ MTK_MAX_BANK * MTK_BANK_WIDTH,
++ &irq_domain_ops, NULL);
++ if (!mediatek_gpio_irq_domain)
++ dev_err(&pdev->dev, "irq_domain_add_linear failed\n");
++ }
++
++ for_each_child_of_node(np, bank)
++ if (of_device_is_compatible(bank, "mtk,mt7621-gpio-bank"))
++ mediatek_gpio_bank_probe(pdev, bank);
++
++ if (mediatek_gpio_irq_domain)
++ irq_set_chained_handler(mediatek_gpio_irq, mediatek_gpio_irq_handler);
++
++ return 0;
++}
++
++static const struct of_device_id mediatek_gpio_match[] = {
++ { .compatible = "mtk,mt7621-gpio" },
++ {},
++};
++MODULE_DEVICE_TABLE(of, mediatek_gpio_match);
++
++static struct platform_driver mediatek_gpio_driver = {
++ .probe = mediatek_gpio_probe,
++ .driver = {
++ .name = "mt7621_gpio",
++ .owner = THIS_MODULE,
++ .of_match_table = mediatek_gpio_match,
++ },
++};
++
++static int __init
++mediatek_gpio_init(void)
++{
++ return platform_driver_register(&mediatek_gpio_driver);
++}
++
++subsys_initcall(mediatek_gpio_init);
diff --git a/target/linux/ramips/patches-5.4/0029-gpio-ralink-Add-support-for-GPIO-as-interrupt-contro.patch b/target/linux/ramips/patches-5.4/0029-gpio-ralink-Add-support-for-GPIO-as-interrupt-contro.patch
new file mode 100644
index 00000000000..8520ce32ff7
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0029-gpio-ralink-Add-support-for-GPIO-as-interrupt-contro.patch
@@ -0,0 +1,44 @@
+From 57fa7f2f4ef6f78ce1d30509c0d111aa3791b524 Mon Sep 17 00:00:00 2001
+From: Daniel Santos <daniel.santos@pobox.com>
+Date: Sun, 4 Nov 2018 20:24:32 -0600
+Subject: gpio-ralink: Add support for GPIO as interrupt-controller
+
+Signed-off-by: Daniel Santos <daniel.santos@pobox.com>
+---
+ Documentation/devicetree/bindings/gpio/gpio-ralink.txt | 6 ++++++
+ drivers/gpio/gpio-ralink.c | 2 +-
+ 2 files changed, 7 insertions(+), 1 deletion(-)
+
+--- a/Documentation/devicetree/bindings/gpio/gpio-ralink.txt
++++ b/Documentation/devicetree/bindings/gpio/gpio-ralink.txt
+@@ -17,6 +17,9 @@ Required properties:
+
+ Optional properties:
+ - ralink,gpio-base : Specify the GPIO chips base number
++- interrupt-controller : marks this as an interrupt controller
++- #interrupt-cells : a standard two-cell interrupt flag, see
++ interrupt-controller/interrupts.txt
+
+ Example:
+
+@@ -28,6 +31,9 @@ Example:
+
+ reg = <0x600 0x34>;
+
++ interrupt-controller;
++ #interrupt-cells = <2>;
++
+ interrupt-parent = <&intc>;
+ interrupts = <6>;
+
+--- a/drivers/gpio/gpio-ralink.c
++++ b/drivers/gpio/gpio-ralink.c
+@@ -220,7 +220,7 @@ static int gpio_map(struct irq_domain *d
+ }
+
+ static const struct irq_domain_ops irq_domain_ops = {
+- .xlate = irq_domain_xlate_onecell,
++ .xlate = irq_domain_xlate_twocell,
+ .map = gpio_map,
+ };
+
diff --git a/target/linux/ramips/patches-5.4/0031-uvc-add-iPassion-iP2970-support.patch b/target/linux/ramips/patches-5.4/0031-uvc-add-iPassion-iP2970-support.patch
new file mode 100644
index 00000000000..7ed1a616f61
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0031-uvc-add-iPassion-iP2970-support.patch
@@ -0,0 +1,246 @@
+From 975e76214cd2516eb6cfff4c3eec581872645e88 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Thu, 19 Sep 2013 01:50:59 +0200
+Subject: [PATCH 31/53] uvc: add iPassion iP2970 support
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/media/usb/uvc/uvc_driver.c | 12 +++
+ drivers/media/usb/uvc/uvc_status.c | 2 +
+ drivers/media/usb/uvc/uvc_video.c | 147 ++++++++++++++++++++++++++++++++++++
+ drivers/media/usb/uvc/uvcvideo.h | 5 +-
+ 4 files changed, 165 insertions(+), 1 deletion(-)
+
+--- a/drivers/media/usb/uvc/uvc_driver.c
++++ b/drivers/media/usb/uvc/uvc_driver.c
+@@ -2749,6 +2749,18 @@ static const struct usb_device_id uvc_id
+ .bInterfaceSubClass = 1,
+ .bInterfaceProtocol = 0,
+ .driver_info = UVC_QUIRK_FORCE_Y8 },
++ /* iPassion iP2970 */
++ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
++ | USB_DEVICE_ID_MATCH_INT_INFO,
++ .idVendor = 0x1B3B,
++ .idProduct = 0x2970,
++ .bInterfaceClass = USB_CLASS_VIDEO,
++ .bInterfaceSubClass = 1,
++ .bInterfaceProtocol = 0,
++ .driver_info = UVC_QUIRK_PROBE_MINMAX
++ | UVC_QUIRK_STREAM_NO_FID
++ | UVC_QUIRK_MOTION
++ | UVC_QUIRK_SINGLE_ISO },
+ /* Generic USB Video Class */
+ { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_UNDEFINED) },
+ { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_15) },
+--- a/drivers/media/usb/uvc/uvc_status.c
++++ b/drivers/media/usb/uvc/uvc_status.c
+@@ -139,6 +139,7 @@ static void uvc_status_complete(struct u
+ switch (dev->status[0] & 0x0f) {
+ case UVC_STATUS_TYPE_CONTROL:
+ uvc_event_control(dev, dev->status, len);
++ dev->motion = 1;
+ break;
+
+ case UVC_STATUS_TYPE_STREAMING:
+@@ -182,6 +183,7 @@ int uvc_status_init(struct uvc_device *d
+ }
+
+ pipe = usb_rcvintpipe(dev->udev, ep->desc.bEndpointAddress);
++ dev->motion = 0;
+
+ /* For high-speed interrupt endpoints, the bInterval value is used as
+ * an exponent of two. Some developers forgot about it.
+--- a/drivers/media/usb/uvc/uvc_video.c
++++ b/drivers/media/usb/uvc/uvc_video.c
+@@ -21,6 +21,11 @@
+ #include <linux/wait.h>
+ #include <linux/atomic.h>
+ #include <asm/unaligned.h>
++#include <linux/skbuff.h>
++#include <linux/kobject.h>
++#include <linux/netlink.h>
++#include <linux/kobject.h>
++#include <linux/workqueue.h>
+
+ #include <media/v4l2-common.h>
+
+@@ -1101,9 +1106,149 @@ static void uvc_video_decode_data(struct
+ }
+ }
+
++struct bh_priv {
++ unsigned long seen;
++};
++
++struct bh_event {
++ const char *name;
++ struct sk_buff *skb;
++ struct work_struct work;
++};
++
++#define BH_ERR(fmt, args...) printk(KERN_ERR "%s: " fmt, "webcam", ##args )
++#define BH_DBG(fmt, args...) do {} while (0)
++#define BH_SKB_SIZE 2048
++
++extern u64 uevent_next_seqnum(void);
++static int seen = 0;
++
++static int bh_event_add_var(struct bh_event *event, int argv,
++ const char *format, ...)
++{
++ static char buf[128];
++ char *s;
++ va_list args;
++ int len;
++
++ if (argv)
++ return 0;
++
++ va_start(args, format);
++ len = vsnprintf(buf, sizeof(buf), format, args);
++ va_end(args);
++
++ if (len >= sizeof(buf)) {
++ BH_ERR("buffer size too small\n");
++ WARN_ON(1);
++ return -ENOMEM;
++ }
++
++ s = skb_put(event->skb, len + 1);
++ strcpy(s, buf);
++
++ BH_DBG("added variable '%s'\n", s);
++
++ return 0;
++}
++
++static int motion_hotplug_fill_event(struct bh_event *event)
++{
++ int s = jiffies;
++ int ret;
++
++ if (!seen)
++ seen = jiffies;
++
++ ret = bh_event_add_var(event, 0, "HOME=%s", "/");
++ if (ret)
++ return ret;
++
++ ret = bh_event_add_var(event, 0, "PATH=%s",
++ "/sbin:/bin:/usr/sbin:/usr/bin");
++ if (ret)
++ return ret;
++
++ ret = bh_event_add_var(event, 0, "SUBSYSTEM=usb");
++ if (ret)
++ return ret;
++
++ ret = bh_event_add_var(event, 0, "ACTION=motion");
++ if (ret)
++ return ret;
++
++ ret = bh_event_add_var(event, 0, "SEEN=%d", s - seen);
++ if (ret)
++ return ret;
++ seen = s;
++
++ ret = bh_event_add_var(event, 0, "SEQNUM=%llu", uevent_next_seqnum());
++
++ return ret;
++}
++
++static void motion_hotplug_work(struct work_struct *work)
++{
++ struct bh_event *event = container_of(work, struct bh_event, work);
++ int ret = 0;
++
++ event->skb = alloc_skb(BH_SKB_SIZE, GFP_KERNEL);
++ if (!event->skb)
++ goto out_free_event;
++
++ ret = bh_event_add_var(event, 0, "%s@", "add");
++ if (ret)
++ goto out_free_skb;
++
++ ret = motion_hotplug_fill_event(event);
++ if (ret)
++ goto out_free_skb;
++
++ NETLINK_CB(event->skb).dst_group = 1;
++ broadcast_uevent(event->skb, 0, 1, GFP_KERNEL);
++
++out_free_skb:
++ if (ret) {
++ BH_ERR("work error %d\n", ret);
++ kfree_skb(event->skb);
++ }
++out_free_event:
++ kfree(event);
++}
++
++static int motion_hotplug_create_event(void)
++{
++ struct bh_event *event;
++
++ event = kzalloc(sizeof(*event), GFP_KERNEL);
++ if (!event)
++ return -ENOMEM;
++
++ event->name = "motion";
++
++ INIT_WORK(&event->work, (void *)(void *)motion_hotplug_work);
++ schedule_work(&event->work);
++
++ return 0;
++}
++
++#define MOTION_FLAG_OFFSET 4
+ static void uvc_video_decode_end(struct uvc_streaming *stream,
+ struct uvc_buffer *buf, const __u8 *data, int len)
+ {
++ if ((stream->dev->quirks & UVC_QUIRK_MOTION) &&
++ (data[len - 2] == 0xff) && (data[len - 1] == 0xd9)) {
++ u8 *mem;
++ buf->state = UVC_BUF_STATE_READY;
++ mem = (u8 *) (buf->mem + MOTION_FLAG_OFFSET);
++ if ( stream->dev->motion ) {
++ stream->dev->motion = 0;
++ motion_hotplug_create_event();
++ } else {
++ *mem &= 0x7f;
++ }
++ }
++
+ /* Mark the buffer as done if the EOF marker is set. */
+ if (data[1] & UVC_STREAM_EOF && buf->bytesused != 0) {
+ uvc_trace(UVC_TRACE_FRAME, "Frame complete (EOF found).\n");
+@@ -1518,6 +1663,8 @@ static int uvc_init_video_isoc(struct uv
+ if (npackets == 0)
+ return -ENOMEM;
+
++ if (stream->dev->quirks & UVC_QUIRK_SINGLE_ISO)
++ npackets = 1;
+ size = npackets * psize;
+
+ for (i = 0; i < UVC_URBS; ++i) {
+--- a/drivers/media/usb/uvc/uvcvideo.h
++++ b/drivers/media/usb/uvc/uvcvideo.h
+@@ -186,7 +186,9 @@
+ #define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200
+ #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400
+ #define UVC_QUIRK_FORCE_Y8 0x00000800
+-
++#define UVC_QUIRK_MOTION 0x00001000
++#define UVC_QUIRK_SINGLE_ISO 0x00002000
++
+ /* Format flags */
+ #define UVC_FMT_FLAG_COMPRESSED 0x00000001
+ #define UVC_FMT_FLAG_STREAM 0x00000002
+@@ -584,6 +586,7 @@ struct uvc_device {
+ __u8 *status;
+ struct input_dev *input;
+ char input_phys[64];
++ int motion;
+ };
+
+ enum uvc_handle_state {
diff --git a/target/linux/ramips/patches-5.4/0032-USB-dwc2-add-device_reset.patch b/target/linux/ramips/patches-5.4/0032-USB-dwc2-add-device_reset.patch
new file mode 100644
index 00000000000..c04e2db6615
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0032-USB-dwc2-add-device_reset.patch
@@ -0,0 +1,29 @@
+From a758e0870c6d1e4b0272f6e7f9efa9face5534bb Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 27 Jul 2014 09:49:07 +0100
+Subject: [PATCH 32/53] USB: dwc2: add device_reset()
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/usb/dwc2/hcd.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/drivers/usb/dwc2/hcd.c
++++ b/drivers/usb/dwc2/hcd.c
+@@ -48,6 +48,7 @@
+ #include <linux/io.h>
+ #include <linux/slab.h>
+ #include <linux/usb.h>
++#include <linux/reset.h>
+
+ #include <linux/usb/hcd.h>
+ #include <linux/usb/ch11.h>
+@@ -5215,6 +5216,8 @@ int dwc2_hcd_init(struct dwc2_hsotg *hso
+
+ retval = -ENOMEM;
+
++ device_reset(hsotg->dev);
++
+ hcfg = dwc2_readl(hsotg->regs + HCFG);
+ dev_dbg(hsotg->dev, "hcfg=%08x\n", hcfg);
+
diff --git a/target/linux/ramips/patches-5.4/0034-NET-multi-phy-support.patch b/target/linux/ramips/patches-5.4/0034-NET-multi-phy-support.patch
new file mode 100644
index 00000000000..5536e3f61c3
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0034-NET-multi-phy-support.patch
@@ -0,0 +1,59 @@
+From 0b6eb1e68290243d439ee330ea8d0b239a5aec69 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 27 Jul 2014 09:38:50 +0100
+Subject: [PATCH 34/53] NET: multi phy support
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/net/phy/phy.c | 9 ++++++---
+ include/linux/phy.h | 1 +
+ 2 files changed, 7 insertions(+), 3 deletions(-)
+
+--- a/drivers/net/phy/phy.c
++++ b/drivers/net/phy/phy.c
+@@ -913,7 +913,10 @@ void phy_state_machine(struct work_struc
+ /* If the link is down, give up on negotiation for now */
+ if (!phydev->link) {
+ phydev->state = PHY_NOLINK;
+- phy_link_down(phydev, true);
++ if (!phydev->no_auto_carrier_off)
++ phy_link_down(phydev, true);
++ else
++ phy_link_down(phydev, false);
+ break;
+ }
+
+@@ -1000,7 +1003,10 @@ void phy_state_machine(struct work_struc
+ phy_link_up(phydev);
+ } else {
+ phydev->state = PHY_NOLINK;
+- phy_link_down(phydev, true);
++ if (!phydev->no_auto_carrier_off)
++ phy_link_down(phydev, true);
++ else
++ phy_link_down(phydev, false);
+ }
+
+ if (phy_interrupt_is_valid(phydev))
+@@ -1010,7 +1016,10 @@ void phy_state_machine(struct work_struc
+ case PHY_HALTED:
+ if (phydev->link) {
+ phydev->link = 0;
+- phy_link_down(phydev, true);
++ if (!phydev->no_auto_carrier_off)
++ phy_link_down(phydev, true);
++ else
++ phy_link_down(phydev, false);
+ do_suspend = true;
+ }
+ break;
+--- a/include/linux/phy.h
++++ b/include/linux/phy.h
+@@ -412,6 +412,7 @@ struct phy_device {
+ bool suspended;
+ bool sysfs_links;
+ bool loopback_enabled;
++ bool no_auto_carrier_off;
+
+ enum phy_state state;
+
diff --git a/target/linux/ramips/patches-5.4/0037-mtd-cfi-cmdset-0002-force-word-write.patch b/target/linux/ramips/patches-5.4/0037-mtd-cfi-cmdset-0002-force-word-write.patch
new file mode 100644
index 00000000000..478af4cbc91
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0037-mtd-cfi-cmdset-0002-force-word-write.patch
@@ -0,0 +1,70 @@
+From ee9081b2726a5ca8cde5497afdc5425e21ff8f8b Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Mon, 15 Jul 2013 00:39:21 +0200
+Subject: [PATCH 37/53] mtd: cfi cmdset 0002 force word write
+
+---
+ drivers/mtd/chips/cfi_cmdset_0002.c | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+--- a/drivers/mtd/chips/cfi_cmdset_0002.c
++++ b/drivers/mtd/chips/cfi_cmdset_0002.c
+@@ -40,7 +40,7 @@
+ #include <linux/mtd/xip.h>
+
+ #define AMD_BOOTLOC_BUG
+-#define FORCE_WORD_WRITE 0
++#define FORCE_WORD_WRITE 1
+
+ #define MAX_RETRIES 3
+
+@@ -51,7 +51,9 @@
+
+ static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
+ static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
++#if !FORCE_WORD_WRITE
+ static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
++#endif
+ static int cfi_amdstd_erase_chip(struct mtd_info *, struct erase_info *);
+ static int cfi_amdstd_erase_varsize(struct mtd_info *, struct erase_info *);
+ static void cfi_amdstd_sync (struct mtd_info *);
+@@ -202,6 +204,7 @@ static void fixup_amd_bootblock(struct m
+ }
+ #endif
+
++#if !FORCE_WORD_WRITE
+ static void fixup_use_write_buffers(struct mtd_info *mtd)
+ {
+ struct map_info *map = mtd->priv;
+@@ -211,6 +214,7 @@ static void fixup_use_write_buffers(stru
+ mtd->_write = cfi_amdstd_write_buffers;
+ }
+ }
++#endif /* !FORCE_WORD_WRITE */
+
+ /* Atmel chips don't use the same PRI format as AMD chips */
+ static void fixup_convert_atmel_pri(struct mtd_info *mtd)
+@@ -1798,6 +1802,7 @@ static int cfi_amdstd_write_words(struct
+ /*
+ * FIXME: interleaved mode not tested, and probably not supported!
+ */
++#if !FORCE_WORD_WRITE
+ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
+ unsigned long adr, const u_char *buf,
+ int len)
+@@ -1926,7 +1931,6 @@ static int __xipram do_write_buffer(stru
+ return ret;
+ }
+
+-
+ static int cfi_amdstd_write_buffers(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
+ {
+@@ -2001,6 +2005,7 @@ static int cfi_amdstd_write_buffers(stru
+
+ return 0;
+ }
++#endif /* !FORCE_WORD_WRITE */
+
+ /*
+ * Wait for the flash chip to become ready to write data
diff --git a/target/linux/ramips/patches-5.4/0038-Revert-mtd-nand-Remove-unused-chip-write_page-hook.patch b/target/linux/ramips/patches-5.4/0038-Revert-mtd-nand-Remove-unused-chip-write_page-hook.patch
new file mode 100644
index 00000000000..4758f18558e
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0038-Revert-mtd-nand-Remove-unused-chip-write_page-hook.patch
@@ -0,0 +1,67 @@
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Subject: [PATCH] Revert "mtd: nand: Remove unused chip->write_page() hook"
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This reverts commit f107d7a43923a83d837b3ea3c7b7de58cd014bbd.
+
+OpenWrt's downstream driver mtk_nand2 still uses that callback.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+---
+
+--- a/drivers/mtd/nand/nand_base.c
++++ b/drivers/mtd/nand/nand_base.c
+@@ -2577,7 +2577,7 @@ static int nand_write_page_syndrome(stru
+ }
+
+ /**
+- * nand_write_page - write one page
++ * nand_write_page - [REPLACEABLE] write one page
+ * @mtd: MTD device structure
+ * @chip: NAND chip descriptor
+ * @offset: address offset within the page
+@@ -2761,9 +2761,9 @@ static int nand_do_write_ops(struct mtd_
+ memset(chip->oob_poi, 0xff, mtd->oobsize);
+ }
+
+- ret = nand_write_page(mtd, chip, column, bytes, wbuf,
+- oob_required, page,
+- (ops->mode == MTD_OPS_RAW));
++ ret = chip->write_page(mtd, chip, column, bytes, wbuf,
++ oob_required, page,
++ (ops->mode == MTD_OPS_RAW));
+ if (ret)
+ break;
+
+@@ -4719,6 +4719,9 @@ int nand_scan_tail(struct mtd_info *mtd)
+ }
+ }
+
++ if (!chip->write_page)
++ chip->write_page = nand_write_page;
++
+ /*
+ * Check ECC mode, default to software if 3byte/512byte hardware ECC is
+ * selected and we have 256 byte pagesize fallback to software ECC
+--- a/include/linux/mtd/rawnand.h
++++ b/include/linux/mtd/rawnand.h
+@@ -862,6 +862,7 @@ struct nand_manufacturer_ops {
+ * structure which is shared among multiple independent
+ * devices.
+ * @priv: [OPTIONAL] pointer to private chip data
++ * @write_page: [REPLACEABLE] High-level page write function
+ * @manufacturer: [INTERN] Contains manufacturer information
+ */
+
+@@ -885,6 +886,9 @@ struct nand_chip {
+ int(*waitfunc)(struct mtd_info *mtd, struct nand_chip *this);
+ int (*erase)(struct mtd_info *mtd, int page);
+ int (*scan_bbt)(struct mtd_info *mtd);
++ int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
++ uint32_t offset, int data_len, const uint8_t *buf,
++ int oob_required, int page, int raw);
+ int (*onfi_set_features)(struct mtd_info *mtd, struct nand_chip *chip,
+ int feature_addr, uint8_t *subfeature_para);
+ int (*onfi_get_features)(struct mtd_info *mtd, struct nand_chip *chip,
diff --git a/target/linux/ramips/patches-5.4/0039-mtd-add-mt7621-nand-support.patch b/target/linux/ramips/patches-5.4/0039-mtd-add-mt7621-nand-support.patch
new file mode 100644
index 00000000000..3c6a59b8639
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0039-mtd-add-mt7621-nand-support.patch
@@ -0,0 +1,4437 @@
+From 0e1c4e3c97b83b4e7da65b1c56f0a7d40736ac53 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 27 Jul 2014 11:05:17 +0100
+Subject: [PATCH 39/53] mtd: add mt7621 nand support
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/mtd/nand/Kconfig | 6 +
+ drivers/mtd/nand/Makefile | 1 +
+ drivers/mtd/nand/bmt.c | 750 ++++++++++++
+ drivers/mtd/nand/bmt.h | 80 ++
+ drivers/mtd/nand/dev-nand.c | 63 +
+ drivers/mtd/nand/mt6575_typedefs.h | 340 ++++++
+ drivers/mtd/nand/mtk_nand2.c | 2304 +++++++++++++++++++++++++++++++++++
+ drivers/mtd/nand/mtk_nand2.h | 452 +++++++
+ drivers/mtd/nand/nand_base.c | 6 +-
+ drivers/mtd/nand/nand_def.h | 123 ++
+ drivers/mtd/nand/nand_device_list.h | 55 +
+ drivers/mtd/nand/partition.h | 115 ++
+ 13 files changed, 4311 insertions(+), 3 deletions(-)
+ create mode 100644 drivers/mtd/nand/bmt.c
+ create mode 100644 drivers/mtd/nand/bmt.h
+ create mode 100644 drivers/mtd/nand/dev-nand.c
+ create mode 100644 drivers/mtd/nand/mt6575_typedefs.h
+ create mode 100644 drivers/mtd/nand/mtk_nand2.c
+ create mode 100644 drivers/mtd/nand/mtk_nand2.h
+ create mode 100644 drivers/mtd/nand/nand_def.h
+ create mode 100644 drivers/mtd/nand/nand_device_list.h
+ create mode 100644 drivers/mtd/nand/partition.h
+
+--- a/drivers/mtd/nand/Kconfig
++++ b/drivers/mtd/nand/Kconfig
+@@ -563,4 +563,10 @@ config MTD_NAND_MTK
+ Enables support for NAND controller on MTK SoCs.
+ This controller is found on mt27xx, mt81xx, mt65xx SoCs.
+
++config MTK_MTD_NAND
++ tristate "Support for MTK SoC NAND controller"
++ depends on SOC_MT7621
++ select MTD_NAND_IDS
++ select MTD_NAND_ECC
++
+ endif # MTD_NAND
+--- a/drivers/mtd/nand/Makefile
++++ b/drivers/mtd/nand/Makefile
+@@ -60,6 +60,7 @@ obj-$(CONFIG_MTD_NAND_HISI504) +
+ obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmnand/
+ obj-$(CONFIG_MTD_NAND_QCOM) += qcom_nandc.o
+ obj-$(CONFIG_MTD_NAND_MTK) += mtk_nand.o mtk_ecc.o
++obj-$(CONFIG_MTK_MTD_NAND) += mtk_nand2.o bmt.o
+
+ nand-objs := nand_base.o nand_bbt.o nand_timings.o nand_ids.o
+ nand-objs += nand_amd.o
+--- /dev/null
++++ b/drivers/mtd/nand/bmt.c
+@@ -0,0 +1,750 @@
++#include "bmt.h"
++
++typedef struct
++{
++ char signature[3];
++ u8 version;
++ u8 bad_count; // bad block count in pool
++ u8 mapped_count; // mapped block count in pool
++ u8 checksum;
++ u8 reseverd[13];
++} phys_bmt_header;
++
++typedef struct
++{
++ phys_bmt_header header;
++ bmt_entry table[MAX_BMT_SIZE];
++} phys_bmt_struct;
++
++typedef struct
++{
++ char signature[3];
++} bmt_oob_data;
++
++static char MAIN_SIGNATURE[] = "BMT";
++static char OOB_SIGNATURE[] = "bmt";
++#define SIGNATURE_SIZE (3)
++
++#define MAX_DAT_SIZE 0x1000
++#define MAX_OOB_SIZE 0x80
++
++static struct mtd_info *mtd_bmt;
++static struct nand_chip *nand_chip_bmt;
++#define BLOCK_SIZE_BMT (1 << nand_chip_bmt->phys_erase_shift)
++#define PAGE_SIZE_BMT (1 << nand_chip_bmt->page_shift)
++
++#define OFFSET(block) ((block) * BLOCK_SIZE_BMT)
++#define PAGE_ADDR(block) ((block) * BLOCK_SIZE_BMT / PAGE_SIZE_BMT)
++
++/*********************************************************************
++* Flash is splited into 2 parts, system part is for normal system *
++* system usage, size is system_block_count, another is replace pool *
++* +-------------------------------------------------+ *
++* | system_block_count | bmt_block_count | *
++* +-------------------------------------------------+ *
++*********************************************************************/
++static u32 total_block_count; // block number in flash
++static u32 system_block_count;
++static int bmt_block_count; // bmt table size
++// static int bmt_count; // block used in bmt
++static int page_per_block; // page per count
++
++static u32 bmt_block_index; // bmt block index
++static bmt_struct bmt; // dynamic created global bmt table
++
++static u8 dat_buf[MAX_DAT_SIZE];
++static u8 oob_buf[MAX_OOB_SIZE];
++static bool pool_erased;
++
++/***************************************************************
++*
++* Interface adaptor for preloader/uboot/kernel
++* These interfaces operate on physical address, read/write
++* physical data.
++*
++***************************************************************/
++int nand_read_page_bmt(u32 page, u8 * dat, u8 * oob)
++{
++ return mtk_nand_exec_read_page(mtd_bmt, page, PAGE_SIZE_BMT, dat, oob);
++}
++
++bool nand_block_bad_bmt(u32 offset)
++{
++ return mtk_nand_block_bad_hw(mtd_bmt, offset);
++}
++
++bool nand_erase_bmt(u32 offset)
++{
++ int status;
++ if (offset < 0x20000)
++ {
++ MSG(INIT, "erase offset: 0x%x\n", offset);
++ }
++
++ status = mtk_nand_erase_hw(mtd_bmt, offset / PAGE_SIZE_BMT); // as nand_chip structure doesn't have a erase function defined
++ if (status & NAND_STATUS_FAIL)
++ return false;
++ else
++ return true;
++}
++
++int mark_block_bad_bmt(u32 offset)
++{
++ return mtk_nand_block_markbad_hw(mtd_bmt, offset); //mark_block_bad_hw(offset);
++}
++
++bool nand_write_page_bmt(u32 page, u8 * dat, u8 * oob)
++{
++ if (mtk_nand_exec_write_page(mtd_bmt, page, PAGE_SIZE_BMT, dat, oob))
++ return false;
++ else
++ return true;
++}
++
++/***************************************************************
++* *
++* static internal function *
++* *
++***************************************************************/
++static void dump_bmt_info(bmt_struct * bmt)
++{
++ int i;
++
++ MSG(INIT, "BMT v%d. total %d mapping:\n", bmt->version, bmt->mapped_count);
++ for (i = 0; i < bmt->mapped_count; i++)
++ {
++ MSG(INIT, "\t0x%x -> 0x%x\n", bmt->table[i].bad_index, bmt->table[i].mapped_index);
++ }
++}
++
++static bool match_bmt_signature(u8 * dat, u8 * oob)
++{
++
++ if (memcmp(dat + MAIN_SIGNATURE_OFFSET, MAIN_SIGNATURE, SIGNATURE_SIZE))
++ {
++ return false;
++ }
++
++ if (memcmp(oob + OOB_SIGNATURE_OFFSET, OOB_SIGNATURE, SIGNATURE_SIZE))
++ {
++ MSG(INIT, "main signature match, oob signature doesn't match, but ignore\n");
++ }
++ return true;
++}
++
++static u8 cal_bmt_checksum(phys_bmt_struct * phys_table, int bmt_size)
++{
++ int i;
++ u8 checksum = 0;
++ u8 *dat = (u8 *) phys_table;
++
++ checksum += phys_table->header.version;
++ checksum += phys_table->header.mapped_count;
++
++ dat += sizeof(phys_bmt_header);
++ for (i = 0; i < bmt_size * sizeof(bmt_entry); i++)
++ {
++ checksum += dat[i];
++ }
++
++ return checksum;
++}
++
++
++static int is_block_mapped(int index)
++{
++ int i;
++ for (i = 0; i < bmt.mapped_count; i++)
++ {
++ if (index == bmt.table[i].mapped_index)
++ return i;
++ }
++ return -1;
++}
++
++static bool is_page_used(u8 * dat, u8 * oob)
++{
++ return ((oob[OOB_INDEX_OFFSET] != 0xFF) || (oob[OOB_INDEX_OFFSET + 1] != 0xFF));
++}
++
++static bool valid_bmt_data(phys_bmt_struct * phys_table)
++{
++ int i;
++ u8 checksum = cal_bmt_checksum(phys_table, bmt_block_count);
++
++ // checksum correct?
++ if (phys_table->header.checksum != checksum)
++ {
++ MSG(INIT, "BMT Data checksum error: %x %x\n", phys_table->header.checksum, checksum);
++ return false;
++ }
++
++ MSG(INIT, "BMT Checksum is: 0x%x\n", phys_table->header.checksum);
++
++ // block index correct?
++ for (i = 0; i < phys_table->header.mapped_count; i++)
++ {
++ if (phys_table->table[i].bad_index >= total_block_count || phys_table->table[i].mapped_index >= total_block_count || phys_table->table[i].mapped_index < system_block_count)
++ {
++ MSG(INIT, "index error: bad_index: %d, mapped_index: %d\n", phys_table->table[i].bad_index, phys_table->table[i].mapped_index);
++ return false;
++ }
++ }
++
++ // pass check, valid bmt.
++ MSG(INIT, "Valid BMT, version v%d\n", phys_table->header.version);
++ return true;
++}
++
++static void fill_nand_bmt_buffer(bmt_struct * bmt, u8 * dat, u8 * oob)
++{
++ phys_bmt_struct phys_bmt;
++
++ dump_bmt_info(bmt);
++
++ // fill phys_bmt_struct structure with bmt_struct
++ memset(&phys_bmt, 0xFF, sizeof(phys_bmt));
++
++ memcpy(phys_bmt.header.signature, MAIN_SIGNATURE, SIGNATURE_SIZE);
++ phys_bmt.header.version = BMT_VERSION;
++ // phys_bmt.header.bad_count = bmt->bad_count;
++ phys_bmt.header.mapped_count = bmt->mapped_count;
++ memcpy(phys_bmt.table, bmt->table, sizeof(bmt_entry) * bmt_block_count);
++
++ phys_bmt.header.checksum = cal_bmt_checksum(&phys_bmt, bmt_block_count);
++
++ memcpy(dat + MAIN_SIGNATURE_OFFSET, &phys_bmt, sizeof(phys_bmt));
++ memcpy(oob + OOB_SIGNATURE_OFFSET, OOB_SIGNATURE, SIGNATURE_SIZE);
++}
++
++// return valid index if found BMT, else return 0
++static int load_bmt_data(int start, int pool_size)
++{
++ int bmt_index = start + pool_size - 1; // find from the end
++ phys_bmt_struct phys_table;
++ int i;
++
++ MSG(INIT, "[%s]: begin to search BMT from block 0x%x\n", __FUNCTION__, bmt_index);
++
++ for (bmt_index = start + pool_size - 1; bmt_index >= start; bmt_index--)
++ {
++ if (nand_block_bad_bmt(OFFSET(bmt_index)))
++ {
++ MSG(INIT, "Skip bad block: %d\n", bmt_index);
++ continue;
++ }
++
++ if (!nand_read_page_bmt(PAGE_ADDR(bmt_index), dat_buf, oob_buf))
++ {
++ MSG(INIT, "Error found when read block %d\n", bmt_index);
++ continue;
++ }
++
++ if (!match_bmt_signature(dat_buf, oob_buf))
++ {
++ continue;
++ }
++
++ MSG(INIT, "Match bmt signature @ block: 0x%x\n", bmt_index);
++
++ memcpy(&phys_table, dat_buf + MAIN_SIGNATURE_OFFSET, sizeof(phys_table));
++
++ if (!valid_bmt_data(&phys_table))
++ {
++ MSG(INIT, "BMT data is not correct %d\n", bmt_index);
++ continue;
++ } else
++ {
++ bmt.mapped_count = phys_table.header.mapped_count;
++ bmt.version = phys_table.header.version;
++ // bmt.bad_count = phys_table.header.bad_count;
++ memcpy(bmt.table, phys_table.table, bmt.mapped_count * sizeof(bmt_entry));
++
++ MSG(INIT, "bmt found at block: %d, mapped block: %d\n", bmt_index, bmt.mapped_count);
++
++ for (i = 0; i < bmt.mapped_count; i++)
++ {
++ if (!nand_block_bad_bmt(OFFSET(bmt.table[i].bad_index)))
++ {
++ MSG(INIT, "block 0x%x is not mark bad, should be power lost last time\n", bmt.table[i].bad_index);
++ mark_block_bad_bmt(OFFSET(bmt.table[i].bad_index));
++ }
++ }
++
++ return bmt_index;
++ }
++ }
++
++ MSG(INIT, "bmt block not found!\n");
++ return 0;
++}
++
++/*************************************************************************
++* Find an available block and erase. *
++* start_from_end: if true, find available block from end of flash. *
++* else, find from the beginning of the pool *
++* need_erase: if true, all unmapped blocks in the pool will be erased *
++*************************************************************************/
++static int find_available_block(bool start_from_end)
++{
++ int i; // , j;
++ int block = system_block_count;
++ int direction;
++ // int avail_index = 0;
++ MSG(INIT, "Try to find_available_block, pool_erase: %d\n", pool_erased);
++
++ // erase all un-mapped blocks in pool when finding avaliable block
++ if (!pool_erased)
++ {
++ MSG(INIT, "Erase all un-mapped blocks in pool\n");
++ for (i = 0; i < bmt_block_count; i++)
++ {
++ if (block == bmt_block_index)
++ {
++ MSG(INIT, "Skip bmt block 0x%x\n", block);
++ continue;
++ }
++
++ if (nand_block_bad_bmt(OFFSET(block + i)))
++ {
++ MSG(INIT, "Skip bad block 0x%x\n", block + i);
++ continue;
++ }
++//if(block==4095)
++//{
++// continue;
++//}
++
++ if (is_block_mapped(block + i) >= 0)
++ {
++ MSG(INIT, "Skip mapped block 0x%x\n", block + i);
++ continue;
++ }
++
++ if (!nand_erase_bmt(OFFSET(block + i)))
++ {
++ MSG(INIT, "Erase block 0x%x failed\n", block + i);
++ mark_block_bad_bmt(OFFSET(block + i));
++ }
++ }
++
++ pool_erased = 1;
++ }
++
++ if (start_from_end)
++ {
++ block = total_block_count - 1;
++ direction = -1;
++ } else
++ {
++ block = system_block_count;
++ direction = 1;
++ }
++
++ for (i = 0; i < bmt_block_count; i++, block += direction)
++ {
++ if (block == bmt_block_index)
++ {
++ MSG(INIT, "Skip bmt block 0x%x\n", block);
++ continue;
++ }
++
++ if (nand_block_bad_bmt(OFFSET(block)))
++ {
++ MSG(INIT, "Skip bad block 0x%x\n", block);
++ continue;
++ }
++
++ if (is_block_mapped(block) >= 0)
++ {
++ MSG(INIT, "Skip mapped block 0x%x\n", block);
++ continue;
++ }
++
++ MSG(INIT, "Find block 0x%x available\n", block);
++ return block;
++ }
++
++ return 0;
++}
++
++static unsigned short get_bad_index_from_oob(u8 * oob_buf)
++{
++ unsigned short index;
++ memcpy(&index, oob_buf + OOB_INDEX_OFFSET, OOB_INDEX_SIZE);
++
++ return index;
++}
++
++void set_bad_index_to_oob(u8 * oob, u16 index)
++{
++ memcpy(oob + OOB_INDEX_OFFSET, &index, sizeof(index));
++}
++
++static int migrate_from_bad(int offset, u8 * write_dat, u8 * write_oob)
++{
++ int page;
++ int error_block = offset / BLOCK_SIZE_BMT;
++ int error_page = (offset / PAGE_SIZE_BMT) % page_per_block;
++ int to_index;
++
++ memcpy(oob_buf, write_oob, MAX_OOB_SIZE);
++
++ to_index = find_available_block(false);
++
++ if (!to_index)
++ {
++ MSG(INIT, "Cannot find an available block for BMT\n");
++ return 0;
++ }
++
++ { // migrate error page first
++ MSG(INIT, "Write error page: 0x%x\n", error_page);
++ if (!write_dat)
++ {
++ nand_read_page_bmt(PAGE_ADDR(error_block) + error_page, dat_buf, NULL);
++ write_dat = dat_buf;
++ }
++ // memcpy(oob_buf, write_oob, MAX_OOB_SIZE);
++
++ if (error_block < system_block_count)
++ set_bad_index_to_oob(oob_buf, error_block); // if error_block is already a mapped block, original mapping index is in OOB.
++
++ if (!nand_write_page_bmt(PAGE_ADDR(to_index) + error_page, write_dat, oob_buf))
++ {
++ MSG(INIT, "Write to page 0x%x fail\n", PAGE_ADDR(to_index) + error_page);
++ mark_block_bad_bmt(to_index);
++ return migrate_from_bad(offset, write_dat, write_oob);
++ }
++ }
++
++ for (page = 0; page < page_per_block; page++)
++ {
++ if (page != error_page)
++ {
++ nand_read_page_bmt(PAGE_ADDR(error_block) + page, dat_buf, oob_buf);
++ if (is_page_used(dat_buf, oob_buf))
++ {
++ if (error_block < system_block_count)
++ {
++ set_bad_index_to_oob(oob_buf, error_block);
++ }
++ MSG(INIT, "\tmigrate page 0x%x to page 0x%x\n", PAGE_ADDR(error_block) + page, PAGE_ADDR(to_index) + page);
++ if (!nand_write_page_bmt(PAGE_ADDR(to_index) + page, dat_buf, oob_buf))
++ {
++ MSG(INIT, "Write to page 0x%x fail\n", PAGE_ADDR(to_index) + page);
++ mark_block_bad_bmt(to_index);
++ return migrate_from_bad(offset, write_dat, write_oob);
++ }
++ }
++ }
++ }
++
++ MSG(INIT, "Migrate from 0x%x to 0x%x done!\n", error_block, to_index);
++
++ return to_index;
++}
++
++static bool write_bmt_to_flash(u8 * dat, u8 * oob)
++{
++ bool need_erase = true;
++ MSG(INIT, "Try to write BMT\n");
++
++ if (bmt_block_index == 0)
++ {
++ // if we don't have index, we don't need to erase found block as it has been erased in find_available_block()
++ need_erase = false;
++ if (!(bmt_block_index = find_available_block(true)))
++ {
++ MSG(INIT, "Cannot find an available block for BMT\n");
++ return false;
++ }
++ }
++
++ MSG(INIT, "Find BMT block: 0x%x\n", bmt_block_index);
++
++ // write bmt to flash
++ if (need_erase)
++ {
++ if (!nand_erase_bmt(OFFSET(bmt_block_index)))
++ {
++ MSG(INIT, "BMT block erase fail, mark bad: 0x%x\n", bmt_block_index);
++ mark_block_bad_bmt(OFFSET(bmt_block_index));
++ // bmt.bad_count++;
++
++ bmt_block_index = 0;
++ return write_bmt_to_flash(dat, oob); // recursive call
++ }
++ }
++
++ if (!nand_write_page_bmt(PAGE_ADDR(bmt_block_index), dat, oob))
++ {
++ MSG(INIT, "Write BMT data fail, need to write again\n");
++ mark_block_bad_bmt(OFFSET(bmt_block_index));
++ // bmt.bad_count++;
++
++ bmt_block_index = 0;
++ return write_bmt_to_flash(dat, oob); // recursive call
++ }
++
++ MSG(INIT, "Write BMT data to block 0x%x success\n", bmt_block_index);
++ return true;
++}
++
++/*******************************************************************
++* Reconstruct bmt, called when found bmt info doesn't match bad
++* block info in flash.
++*
++* Return NULL for failure
++*******************************************************************/
++bmt_struct *reconstruct_bmt(bmt_struct * bmt)
++{
++ int i;
++ int index = system_block_count;
++ unsigned short bad_index;
++ int mapped;
++
++ // init everything in BMT struct
++ bmt->version = BMT_VERSION;
++ bmt->bad_count = 0;
++ bmt->mapped_count = 0;
++
++ memset(bmt->table, 0, bmt_block_count * sizeof(bmt_entry));
++
++ for (i = 0; i < bmt_block_count; i++, index++)
++ {
++ if (nand_block_bad_bmt(OFFSET(index)))
++ {
++ MSG(INIT, "Skip bad block: 0x%x\n", index);
++ // bmt->bad_count++;
++ continue;
++ }
++
++ MSG(INIT, "read page: 0x%x\n", PAGE_ADDR(index));
++ nand_read_page_bmt(PAGE_ADDR(index), dat_buf, oob_buf);
++ /* if (mtk_nand_read_page_hw(PAGE_ADDR(index), dat_buf))
++ {
++ MSG(INIT, "Error when read block %d\n", bmt_block_index);
++ continue;
++ } */
++
++ if ((bad_index = get_bad_index_from_oob(oob_buf)) >= system_block_count)
++ {
++ MSG(INIT, "get bad index: 0x%x\n", bad_index);
++ if (bad_index != 0xFFFF)
++ MSG(INIT, "Invalid bad index found in block 0x%x, bad index 0x%x\n", index, bad_index);
++ continue;
++ }
++
++ MSG(INIT, "Block 0x%x is mapped to bad block: 0x%x\n", index, bad_index);
++
++ if (!nand_block_bad_bmt(OFFSET(bad_index)))
++ {
++ MSG(INIT, "\tbut block 0x%x is not marked as bad, invalid mapping\n", bad_index);
++ continue; // no need to erase here, it will be erased later when trying to write BMT
++ }
++
++ if ((mapped = is_block_mapped(bad_index)) >= 0)
++ {
++ MSG(INIT, "bad block 0x%x is mapped to 0x%x, should be caused by power lost, replace with one\n", bmt->table[mapped].bad_index, bmt->table[mapped].mapped_index);
++ bmt->table[mapped].mapped_index = index; // use new one instead.
++ } else
++ {
++ // add mapping to BMT
++ bmt->table[bmt->mapped_count].bad_index = bad_index;
++ bmt->table[bmt->mapped_count].mapped_index = index;
++ bmt->mapped_count++;
++ }
++
++ MSG(INIT, "Add mapping: 0x%x -> 0x%x to BMT\n", bad_index, index);
++
++ }
++
++ MSG(INIT, "Scan replace pool done, mapped block: %d\n", bmt->mapped_count);
++ // dump_bmt_info(bmt);
++
++ // fill NAND BMT buffer
++ memset(oob_buf, 0xFF, sizeof(oob_buf));
++ fill_nand_bmt_buffer(bmt, dat_buf, oob_buf);
++
++ // write BMT back
++ if (!write_bmt_to_flash(dat_buf, oob_buf))
++ {
++ MSG(INIT, "TRAGEDY: cannot find a place to write BMT!!!!\n");
++ }
++
++ return bmt;
++}
++
++/*******************************************************************
++* [BMT Interface]
++*
++* Description:
++* Init bmt from nand. Reconstruct if not found or data error
++*
++* Parameter:
++* size: size of bmt and replace pool
++*
++* Return:
++* NULL for failure, and a bmt struct for success
++*******************************************************************/
++bmt_struct *init_bmt(struct nand_chip * chip, int size)
++{
++ struct mtk_nand_host *host;
++
++ if (size > 0 && size < MAX_BMT_SIZE)
++ {
++ MSG(INIT, "Init bmt table, size: %d\n", size);
++ bmt_block_count = size;
++ } else
++ {
++ MSG(INIT, "Invalid bmt table size: %d\n", size);
++ return NULL;
++ }
++ nand_chip_bmt = chip;
++ system_block_count = chip->chipsize >> chip->phys_erase_shift;
++ total_block_count = bmt_block_count + system_block_count;
++ page_per_block = BLOCK_SIZE_BMT / PAGE_SIZE_BMT;
++ host = (struct mtk_nand_host *)chip->priv;
++ mtd_bmt = host->mtd;
++
++ MSG(INIT, "mtd_bmt: %p, nand_chip_bmt: %p\n", mtd_bmt, nand_chip_bmt);
++ MSG(INIT, "bmt count: %d, system count: %d\n", bmt_block_count, system_block_count);
++
++ // set this flag, and unmapped block in pool will be erased.
++ pool_erased = 0;
++ memset(bmt.table, 0, size * sizeof(bmt_entry));
++ if ((bmt_block_index = load_bmt_data(system_block_count, size)))
++ {
++ MSG(INIT, "Load bmt data success @ block 0x%x\n", bmt_block_index);
++ dump_bmt_info(&bmt);
++ return &bmt;
++ } else
++ {
++ MSG(INIT, "Load bmt data fail, need re-construct!\n");
++#ifndef __UBOOT_NAND__ // BMT is not re-constructed in UBOOT.
++ if (reconstruct_bmt(&bmt))
++ return &bmt;
++ else
++#endif
++ return NULL;
++ }
++}
++
++/*******************************************************************
++* [BMT Interface]
++*
++* Description:
++* Update BMT.
++*
++* Parameter:
++* offset: update block/page offset.
++* reason: update reason, see update_reason_t for reason.
++* dat/oob: data and oob buffer for write fail.
++*
++* Return:
++* Return true for success, and false for failure.
++*******************************************************************/
++bool update_bmt(u32 offset, update_reason_t reason, u8 * dat, u8 * oob)
++{
++ int map_index;
++ int orig_bad_block = -1;
++ // int bmt_update_index;
++ int i;
++ int bad_index = offset / BLOCK_SIZE_BMT;
++
++#ifndef MTK_NAND_BMT
++ return false;
++#endif
++ if (reason == UPDATE_WRITE_FAIL)
++ {
++ MSG(INIT, "Write fail, need to migrate\n");
++ if (!(map_index = migrate_from_bad(offset, dat, oob)))
++ {
++ MSG(INIT, "migrate fail\n");
++ return false;
++ }
++ } else
++ {
++ if (!(map_index = find_available_block(false)))
++ {
++ MSG(INIT, "Cannot find block in pool\n");
++ return false;
++ }
++ }
++
++ // now let's update BMT
++ if (bad_index >= system_block_count) // mapped block become bad, find original bad block
++ {
++ for (i = 0; i < bmt_block_count; i++)
++ {
++ if (bmt.table[i].mapped_index == bad_index)
++ {
++ orig_bad_block = bmt.table[i].bad_index;
++ break;
++ }
++ }
++ // bmt.bad_count++;
++ MSG(INIT, "Mapped block becomes bad, orig bad block is 0x%x\n", orig_bad_block);
++
++ bmt.table[i].mapped_index = map_index;
++ } else
++ {
++ bmt.table[bmt.mapped_count].mapped_index = map_index;
++ bmt.table[bmt.mapped_count].bad_index = bad_index;
++ bmt.mapped_count++;
++ }
++
++ memset(oob_buf, 0xFF, sizeof(oob_buf));
++ fill_nand_bmt_buffer(&bmt, dat_buf, oob_buf);
++ if (!write_bmt_to_flash(dat_buf, oob_buf))
++ return false;
++
++ mark_block_bad_bmt(offset);
++
++ return true;
++}
++
++/*******************************************************************
++* [BMT Interface]
++*
++* Description:
++* Given an block index, return mapped index if it's mapped, else
++* return given index.
++*
++* Parameter:
++* index: given an block index. This value cannot exceed
++* system_block_count.
++*
++* Return NULL for failure
++*******************************************************************/
++u16 get_mapping_block_index(int index)
++{
++ int i;
++#ifndef MTK_NAND_BMT
++ return index;
++#endif
++ if (index > system_block_count)
++ {
++ return index;
++ }
++
++ for (i = 0; i < bmt.mapped_count; i++)
++ {
++ if (bmt.table[i].bad_index == index)
++ {
++ return bmt.table[i].mapped_index;
++ }
++ }
++
++ return index;
++}
++#ifdef __KERNEL_NAND__
++EXPORT_SYMBOL_GPL(init_bmt);
++EXPORT_SYMBOL_GPL(update_bmt);
++EXPORT_SYMBOL_GPL(get_mapping_block_index);
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("MediaTek");
++MODULE_DESCRIPTION("Bad Block mapping management for MediaTek NAND Flash Driver");
++#endif
+--- /dev/null
++++ b/drivers/mtd/nand/bmt.h
+@@ -0,0 +1,80 @@
++#ifndef __BMT_H__
++#define __BMT_H__
++
++#include "nand_def.h"
++
++#if defined(__PRELOADER_NAND__)
++
++#include "nand.h"
++
++#elif defined(__UBOOT_NAND__)
++
++#include <linux/mtd/nand.h>
++#include "mtk_nand2.h"
++
++#elif defined(__KERNEL_NAND__)
++
++#include <linux/mtd/mtd.h>
++#include <linux/mtd/rawnand.h>
++#include <linux/module.h>
++#include "mtk_nand2.h"
++
++#endif
++
++
++#define MAX_BMT_SIZE (0x80)
++#define BMT_VERSION (1) // initial version
++
++#define MAIN_SIGNATURE_OFFSET (0)
++#define OOB_SIGNATURE_OFFSET (1)
++#define OOB_INDEX_OFFSET (29)
++#define OOB_INDEX_SIZE (2)
++#define FAKE_INDEX (0xAAAA)
++
++typedef struct _bmt_entry_
++{
++ u16 bad_index; // bad block index
++ u16 mapped_index; // mapping block index in the replace pool
++} bmt_entry;
++
++typedef enum
++{
++ UPDATE_ERASE_FAIL,
++ UPDATE_WRITE_FAIL,
++ UPDATE_UNMAPPED_BLOCK,
++ UPDATE_REASON_COUNT,
++} update_reason_t;
++
++typedef struct
++{
++ bmt_entry table[MAX_BMT_SIZE];
++ u8 version;
++ u8 mapped_count; // mapped block count in pool
++ u8 bad_count; // bad block count in pool. Not used in V1
++} bmt_struct;
++
++/***************************************************************
++* *
++* Interface BMT need to use *
++* *
++***************************************************************/
++extern bool mtk_nand_exec_read_page(struct mtd_info *mtd, u32 row, u32 page_size, u8 * dat, u8 * oob);
++extern int mtk_nand_block_bad_hw(struct mtd_info *mtd, loff_t ofs);
++extern int mtk_nand_erase_hw(struct mtd_info *mtd, int page);
++extern int mtk_nand_block_markbad_hw(struct mtd_info *mtd, loff_t ofs);
++extern int mtk_nand_exec_write_page(struct mtd_info *mtd, u32 row, u32 page_size, u8 * dat, u8 * oob);
++
++
++/***************************************************************
++* *
++* Different function interface for preloader/uboot/kernel *
++* *
++***************************************************************/
++void set_bad_index_to_oob(u8 * oob, u16 index);
++
++
++bmt_struct *init_bmt(struct nand_chip *nand, int size);
++bool update_bmt(u32 offset, update_reason_t reason, u8 * dat, u8 * oob);
++unsigned short get_mapping_block_index(int index);
++
++#endif // #ifndef __BMT_H__
+--- /dev/null
++++ b/drivers/mtd/nand/dev-nand.c
+@@ -0,0 +1,63 @@
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/platform_device.h>
++
++#include "mt6575_typedefs.h"
++
++#define RALINK_NAND_CTRL_BASE 0xBE003000
++#define NFI_base RALINK_NAND_CTRL_BASE
++#define RALINK_NANDECC_CTRL_BASE 0xBE003800
++#define NFIECC_base RALINK_NANDECC_CTRL_BASE
++#define MT7621_NFI_IRQ_ID SURFBOARDINT_NAND
++#define MT7621_NFIECC_IRQ_ID SURFBOARDINT_NAND_ECC
++
++#define SURFBOARDINT_NAND 22
++#define SURFBOARDINT_NAND_ECC 23
++
++static struct resource MT7621_resource_nand[] = {
++ {
++ .start = NFI_base,
++ .end = NFI_base + 0x1A0,
++ .flags = IORESOURCE_MEM,
++ },
++ {
++ .start = NFIECC_base,
++ .end = NFIECC_base + 0x150,
++ .flags = IORESOURCE_MEM,
++ },
++ {
++ .start = MT7621_NFI_IRQ_ID,
++ .flags = IORESOURCE_IRQ,
++ },
++ {
++ .start = MT7621_NFIECC_IRQ_ID,
++ .flags = IORESOURCE_IRQ,
++ },
++};
++
++static struct platform_device MT7621_nand_dev = {
++ .name = "MT7621-NAND",
++ .id = 0,
++ .num_resources = ARRAY_SIZE(MT7621_resource_nand),
++ .resource = MT7621_resource_nand,
++ .dev = {
++ .platform_data = &mt7621_nand_hw,
++ },
++};
++
++
++int __init mtk_nand_register(void)
++{
++
++ int retval = 0;
++
++ retval = platform_device_register(&MT7621_nand_dev);
++ if (retval != 0) {
++ printk(KERN_ERR "register nand device fail\n");
++ return retval;
++ }
++
++
++ return retval;
++}
++arch_initcall(mtk_nand_register);
+--- /dev/null
++++ b/drivers/mtd/nand/mt6575_typedefs.h
+@@ -0,0 +1,340 @@
++/* Copyright Statement:
++ *
++ * This software/firmware and related documentation ("MediaTek Software") are
++ * protected under relevant copyright laws. The information contained herein
++ * is confidential and proprietary to MediaTek Inc. and/or its licensors.
++ * Without the prior written permission of MediaTek inc. and/or its licensors,
++ * any reproduction, modification, use or disclosure of MediaTek Software,
++ * and information contained herein, in whole or in part, shall be strictly prohibited.
++ */
++/* MediaTek Inc. (C) 2010. All rights reserved.
++ *
++ * BY OPENING THIS FILE, RECEIVER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
++ * THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
++ * RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO RECEIVER ON
++ * AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
++ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
++ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
++ * NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
++ * SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
++ * SUPPLIED WITH THE MEDIATEK SOFTWARE, AND RECEIVER AGREES TO LOOK ONLY TO SUCH
++ * THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. RECEIVER EXPRESSLY ACKNOWLEDGES
++ * THAT IT IS RECEIVER'S SOLE RESPONSIBILITY TO OBTAIN FROM ANY THIRD PARTY ALL PROPER LICENSES
++ * CONTAINED IN MEDIATEK SOFTWARE. MEDIATEK SHALL ALSO NOT BE RESPONSIBLE FOR ANY MEDIATEK
++ * SOFTWARE RELEASES MADE TO RECEIVER'S SPECIFICATION OR TO CONFORM TO A PARTICULAR
++ * STANDARD OR OPEN FORUM. RECEIVER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND
++ * CUMULATIVE LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
++ * AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
++ * OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY RECEIVER TO
++ * MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
++ *
++ * The following software/firmware and/or related documentation ("MediaTek Software")
++ * have been modified by MediaTek Inc. All revisions are subject to any receiver's
++ * applicable license agreements with MediaTek Inc.
++ */
++
++/*****************************************************************************
++* Copyright Statement:
++* --------------------
++* This software is protected by Copyright and the information contained
++* herein is confidential. The software may not be copied and the information
++* contained herein may not be used or disclosed except with the written
++* permission of MediaTek Inc. (C) 2008
++*
++* BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
++* THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
++* RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO BUYER ON
++* AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
++* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
++* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
++* NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
++* SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
++* SUPPLIED WITH THE MEDIATEK SOFTWARE, AND BUYER AGREES TO LOOK ONLY TO SUCH
++* THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. MEDIATEK SHALL ALSO
++* NOT BE RESPONSIBLE FOR ANY MEDIATEK SOFTWARE RELEASES MADE TO BUYER'S
++* SPECIFICATION OR TO CONFORM TO A PARTICULAR STANDARD OR OPEN FORUM.
++*
++* BUYER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND CUMULATIVE
++* LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
++* AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
++* OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY BUYER TO
++* MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
++*
++* THE TRANSACTION CONTEMPLATED HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE
++* WITH THE LAWS OF THE STATE OF CALIFORNIA, USA, EXCLUDING ITS CONFLICT OF
++* LAWS PRINCIPLES. ANY DISPUTES, CONTROVERSIES OR CLAIMS ARISING THEREOF AND
++* RELATED THERETO SHALL BE SETTLED BY ARBITRATION IN SAN FRANCISCO, CA, UNDER
++* THE RULES OF THE INTERNATIONAL CHAMBER OF COMMERCE (ICC).
++*
++*****************************************************************************/
++
++#ifndef _MT6575_TYPEDEFS_H
++#define _MT6575_TYPEDEFS_H
++
++#if defined (__KERNEL_NAND__)
++#include <linux/bug.h>
++#else
++#define true 1
++#define false 0
++#define bool u8
++#endif
++
++// ---------------------------------------------------------------------------
++// Basic Type Definitions
++// ---------------------------------------------------------------------------
++
++typedef volatile unsigned char *P_kal_uint8;
++typedef volatile unsigned short *P_kal_uint16;
++typedef volatile unsigned int *P_kal_uint32;
++
++typedef long LONG;
++typedef unsigned char UBYTE;
++typedef short SHORT;
++
++typedef signed char kal_int8;
++typedef signed short kal_int16;
++typedef signed int kal_int32;
++typedef long long kal_int64;
++typedef unsigned char kal_uint8;
++typedef unsigned short kal_uint16;
++typedef unsigned int kal_uint32;
++typedef unsigned long long kal_uint64;
++typedef char kal_char;
++
++typedef unsigned int *UINT32P;
++typedef volatile unsigned short *UINT16P;
++typedef volatile unsigned char *UINT8P;
++typedef unsigned char *U8P;
++
++typedef volatile unsigned char *P_U8;
++typedef volatile signed char *P_S8;
++typedef volatile unsigned short *P_U16;
++typedef volatile signed short *P_S16;
++typedef volatile unsigned int *P_U32;
++typedef volatile signed int *P_S32;
++typedef unsigned long long *P_U64;
++typedef signed long long *P_S64;
++
++typedef unsigned char U8;
++typedef signed char S8;
++typedef unsigned short U16;
++typedef signed short S16;
++typedef unsigned int U32;
++typedef signed int S32;
++typedef unsigned long long U64;
++typedef signed long long S64;
++//typedef unsigned char bool;
++
++typedef unsigned char UINT8;
++typedef unsigned short UINT16;
++typedef unsigned int UINT32;
++typedef unsigned short USHORT;
++typedef signed char INT8;
++typedef signed short INT16;
++typedef signed int INT32;
++typedef unsigned int DWORD;
++typedef void VOID;
++typedef unsigned char BYTE;
++typedef float FLOAT;
++
++typedef char *LPCSTR;
++typedef short *LPWSTR;
++
++
++// ---------------------------------------------------------------------------
++// Constants
++// ---------------------------------------------------------------------------
++
++#define IMPORT EXTERN
++#ifndef __cplusplus
++ #define EXTERN extern
++#else
++ #define EXTERN extern "C"
++#endif
++#define LOCAL static
++#define GLOBAL
++#define EXPORT GLOBAL
++
++#define EQ ==
++#define NEQ !=
++#define AND &&
++#define OR ||
++#define XOR(A,B) ((!(A) AND (B)) OR ((A) AND !(B)))
++
++#ifndef FALSE
++ #define FALSE (0)
++#endif
++
++#ifndef TRUE
++ #define TRUE (1)
++#endif
++
++#ifndef NULL
++ #define NULL (0)
++#endif
++
++//enum boolean {false, true};
++enum {RX, TX, NONE};
++
++#ifndef BOOL
++typedef unsigned char BOOL;
++#endif
++
++typedef enum {
++ KAL_FALSE = 0,
++ KAL_TRUE = 1,
++} kal_bool;
++
++
++// ---------------------------------------------------------------------------
++// Type Casting
++// ---------------------------------------------------------------------------
++
++#define AS_INT32(x) (*(INT32 *)((void*)x))
++#define AS_INT16(x) (*(INT16 *)((void*)x))
++#define AS_INT8(x) (*(INT8 *)((void*)x))
++
++#define AS_UINT32(x) (*(UINT32 *)((void*)x))
++#define AS_UINT16(x) (*(UINT16 *)((void*)x))
++#define AS_UINT8(x) (*(UINT8 *)((void*)x))
++
++
++// ---------------------------------------------------------------------------
++// Register Manipulations
++// ---------------------------------------------------------------------------
++
++#define READ_REGISTER_UINT32(reg) \
++ (*(volatile UINT32 * const)(reg))
++
++#define WRITE_REGISTER_UINT32(reg, val) \
++ (*(volatile UINT32 * const)(reg)) = (val)
++
++#define READ_REGISTER_UINT16(reg) \
++ (*(volatile UINT16 * const)(reg))
++
++#define WRITE_REGISTER_UINT16(reg, val) \
++ (*(volatile UINT16 * const)(reg)) = (val)
++
++#define READ_REGISTER_UINT8(reg) \
++ (*(volatile UINT8 * const)(reg))
++
++#define WRITE_REGISTER_UINT8(reg, val) \
++ (*(volatile UINT8 * const)(reg)) = (val)
++
++#define INREG8(x) READ_REGISTER_UINT8((UINT8*)((void*)(x)))
++#define OUTREG8(x, y) WRITE_REGISTER_UINT8((UINT8*)((void*)(x)), (UINT8)(y))
++#define SETREG8(x, y) OUTREG8(x, INREG8(x)|(y))
++#define CLRREG8(x, y) OUTREG8(x, INREG8(x)&~(y))
++#define MASKREG8(x, y, z) OUTREG8(x, (INREG8(x)&~(y))|(z))
++
++#define INREG16(x) READ_REGISTER_UINT16((UINT16*)((void*)(x)))
++#define OUTREG16(x, y) WRITE_REGISTER_UINT16((UINT16*)((void*)(x)),(UINT16)(y))
++#define SETREG16(x, y) OUTREG16(x, INREG16(x)|(y))
++#define CLRREG16(x, y) OUTREG16(x, INREG16(x)&~(y))
++#define MASKREG16(x, y, z) OUTREG16(x, (INREG16(x)&~(y))|(z))
++
++#define INREG32(x) READ_REGISTER_UINT32((UINT32*)((void*)(x)))
++#define OUTREG32(x, y) WRITE_REGISTER_UINT32((UINT32*)((void*)(x)), (UINT32)(y))
++#define SETREG32(x, y) OUTREG32(x, INREG32(x)|(y))
++#define CLRREG32(x, y) OUTREG32(x, INREG32(x)&~(y))
++#define MASKREG32(x, y, z) OUTREG32(x, (INREG32(x)&~(y))|(z))
++
++
++#define DRV_Reg8(addr) INREG8(addr)
++#define DRV_WriteReg8(addr, data) OUTREG8(addr, data)
++#define DRV_SetReg8(addr, data) SETREG8(addr, data)
++#define DRV_ClrReg8(addr, data) CLRREG8(addr, data)
++
++#define DRV_Reg16(addr) INREG16(addr)
++#define DRV_WriteReg16(addr, data) OUTREG16(addr, data)
++#define DRV_SetReg16(addr, data) SETREG16(addr, data)
++#define DRV_ClrReg16(addr, data) CLRREG16(addr, data)
++
++#define DRV_Reg32(addr) INREG32(addr)
++#define DRV_WriteReg32(addr, data) OUTREG32(addr, data)
++#define DRV_SetReg32(addr, data) SETREG32(addr, data)
++#define DRV_ClrReg32(addr, data) CLRREG32(addr, data)
++
++// !!! DEPRECATED, WILL BE REMOVED LATER !!!
++#define DRV_Reg(addr) DRV_Reg16(addr)
++#define DRV_WriteReg(addr, data) DRV_WriteReg16(addr, data)
++#define DRV_SetReg(addr, data) DRV_SetReg16(addr, data)
++#define DRV_ClrReg(addr, data) DRV_ClrReg16(addr, data)
++
++
++// ---------------------------------------------------------------------------
++// Compiler Time Deduction Macros
++// ---------------------------------------------------------------------------
++
++#define _MASK_OFFSET_1(x, n) ((x) & 0x1) ? (n) :
++#define _MASK_OFFSET_2(x, n) _MASK_OFFSET_1((x), (n)) _MASK_OFFSET_1((x) >> 1, (n) + 1)
++#define _MASK_OFFSET_4(x, n) _MASK_OFFSET_2((x), (n)) _MASK_OFFSET_2((x) >> 2, (n) + 2)
++#define _MASK_OFFSET_8(x, n) _MASK_OFFSET_4((x), (n)) _MASK_OFFSET_4((x) >> 4, (n) + 4)
++#define _MASK_OFFSET_16(x, n) _MASK_OFFSET_8((x), (n)) _MASK_OFFSET_8((x) >> 8, (n) + 8)
++#define _MASK_OFFSET_32(x, n) _MASK_OFFSET_16((x), (n)) _MASK_OFFSET_16((x) >> 16, (n) + 16)
++
++#define MASK_OFFSET_ERROR (0xFFFFFFFF)
++
++#define MASK_OFFSET(x) (_MASK_OFFSET_32(x, 0) MASK_OFFSET_ERROR)
++
++
++// ---------------------------------------------------------------------------
++// Assertions
++// ---------------------------------------------------------------------------
++
++#ifndef ASSERT
++ #define ASSERT(expr) BUG_ON(!(expr))
++#endif
++
++#ifndef NOT_IMPLEMENTED
++ #define NOT_IMPLEMENTED() BUG_ON(1)
++#endif
++
++#define STATIC_ASSERT(pred) STATIC_ASSERT_X(pred, __LINE__)
++#define STATIC_ASSERT_X(pred, line) STATIC_ASSERT_XX(pred, line)
++#define STATIC_ASSERT_XX(pred, line) \
++ extern char assertion_failed_at_##line[(pred) ? 1 : -1]
++
++// ---------------------------------------------------------------------------
++// Resolve Compiler Warnings
++// ---------------------------------------------------------------------------
++
++#define NOT_REFERENCED(x) { (x) = (x); }
++
++
++// ---------------------------------------------------------------------------
++// Utilities
++// ---------------------------------------------------------------------------
++
++#define MAXIMUM(A,B) (((A)>(B))?(A):(B))
++#define MINIMUM(A,B) (((A)<(B))?(A):(B))
++
++#define ARY_SIZE(x) (sizeof((x)) / sizeof((x[0])))
++#define DVT_DELAYMACRO(u4Num) \
++{ \
++ UINT32 u4Count = 0 ; \
++ for (u4Count = 0; u4Count < u4Num; u4Count++ ); \
++} \
++
++#define A68351B 0
++#define B68351B 1
++#define B68351D 2
++#define B68351E 3
++#define UNKNOWN_IC_VERSION 0xFF
++
++/* NAND driver */
++struct mtk_nand_host_hw {
++ unsigned int nfi_bus_width; /* NFI_BUS_WIDTH */
++ unsigned int nfi_access_timing; /* NFI_ACCESS_TIMING */
++ unsigned int nfi_cs_num; /* NFI_CS_NUM */
++ unsigned int nand_sec_size; /* NAND_SECTOR_SIZE */
++ unsigned int nand_sec_shift; /* NAND_SECTOR_SHIFT */
++ unsigned int nand_ecc_size;
++ unsigned int nand_ecc_bytes;
++ unsigned int nand_ecc_mode;
++};
++extern struct mtk_nand_host_hw mt7621_nand_hw;
++extern unsigned int CFG_BLOCKSIZE;
++
++#endif // _MT6575_TYPEDEFS_H
++
+--- /dev/null
++++ b/drivers/mtd/nand/mtk_nand2.c
+@@ -0,0 +1,2345 @@
++/******************************************************************************
++* mtk_nand2.c - MTK NAND Flash Device Driver
++ *
++* Copyright 2009-2012 MediaTek Co.,Ltd.
++ *
++* DESCRIPTION:
++* This file provid the other drivers nand relative functions
++ *
++* modification history
++* ----------------------------------------
++* v3.0, 11 Feb 2010, mtk
++* ----------------------------------------
++******************************************************************************/
++#include "nand_def.h"
++#include <linux/slab.h>
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/delay.h>
++#include <linux/errno.h>
++#include <linux/sched.h>
++#include <linux/types.h>
++#include <linux/wait.h>
++#include <linux/spinlock.h>
++#include <linux/interrupt.h>
++#include <linux/mtd/mtd.h>
++#include <linux/mtd/rawnand.h>
++#include <linux/mtd/partitions.h>
++#include <linux/mtd/nand_ecc.h>
++#include <linux/dma-mapping.h>
++#include <linux/jiffies.h>
++#include <linux/platform_device.h>
++#include <linux/proc_fs.h>
++#include <linux/time.h>
++#include <linux/mm.h>
++#include <asm/io.h>
++#include <asm/cacheflush.h>
++#include <asm/uaccess.h>
++#include <linux/miscdevice.h>
++#include "mtk_nand2.h"
++#include "nand_device_list.h"
++
++#include "bmt.h"
++#include "partition.h"
++
++unsigned int CFG_BLOCKSIZE;
++
++static int shift_on_bbt = 0;
++int mtk_nand_read_oob_hw(struct mtd_info *mtd, struct nand_chip *chip, int page);
++
++static const char * const probe_types[] = { "cmdlinepart", "ofpart", NULL };
++
++#define NAND_CMD_STATUS_MULTI 0x71
++
++void show_stack(struct task_struct *tsk, unsigned long *sp);
++extern void mt_irq_set_sens(unsigned int irq, unsigned int sens);
++extern void mt_irq_set_polarity(unsigned int irq,unsigned int polarity);
++
++struct mtk_nand_host mtk_nand_host; /* include mtd_info and nand_chip structs */
++struct mtk_nand_host_hw mt7621_nand_hw = {
++ .nfi_bus_width = 8,
++ .nfi_access_timing = NFI_DEFAULT_ACCESS_TIMING,
++ .nfi_cs_num = NFI_CS_NUM,
++ .nand_sec_size = 512,
++ .nand_sec_shift = 9,
++ .nand_ecc_size = 2048,
++ .nand_ecc_bytes = 32,
++ .nand_ecc_mode = NAND_ECC_HW,
++};
++
++
++/*******************************************************************************
++ * Gloable Varible Definition
++ *******************************************************************************/
++
++#define NFI_ISSUE_COMMAND(cmd, col_addr, row_addr, col_num, row_num) \
++ do { \
++ DRV_WriteReg(NFI_CMD_REG16,cmd);\
++ while (DRV_Reg32(NFI_STA_REG32) & STA_CMD_STATE);\
++ DRV_WriteReg32(NFI_COLADDR_REG32, col_addr);\
++ DRV_WriteReg32(NFI_ROWADDR_REG32, row_addr);\
++ DRV_WriteReg(NFI_ADDRNOB_REG16, col_num | (row_num<<ADDR_ROW_NOB_SHIFT));\
++ while (DRV_Reg32(NFI_STA_REG32) & STA_ADDR_STATE);\
++ }while(0);
++
++//-------------------------------------------------------------------------------
++static struct NAND_CMD g_kCMD;
++static u32 g_u4ChipVer;
++bool g_bInitDone;
++static bool g_bcmdstatus;
++static u32 g_value = 0;
++static int g_page_size;
++
++BOOL g_bHwEcc = true;
++
++
++extern void nand_release_device(struct mtd_info *mtd);
++extern int nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state);
++
++#if defined(MTK_NAND_BMT)
++static bmt_struct *g_bmt;
++#endif
++struct mtk_nand_host *host;
++extern struct mtd_partition g_pasStatic_Partition[];
++int part_num = NUM_PARTITIONS;
++int manu_id;
++int dev_id;
++
++/* this constant was taken from linux/nand/nand.h v 3.14
++ * in later versions it seems it was removed in order to save a bit of space
++ */
++#define NAND_MAX_OOBSIZE 774
++static u8 local_oob_buf[NAND_MAX_OOBSIZE];
++
++static u8 nand_badblock_offset = 0;
++
++static void nand_bbt_set(struct mtd_info *mtd, int page, int flag)
++{
++ struct nand_chip *this = mtd->priv;
++ int block;
++
++ block = (int)(page >> (this->bbt_erase_shift - this->page_shift - 1));
++ this->bbt[block >> 3] &= ~(0x03 << (block & 0x6));
++ this->bbt[block >> 3] |= (flag & 0x3) << (block & 0x6);
++}
++
++static int nand_bbt_get(struct mtd_info *mtd, int page)
++{
++ struct nand_chip *this = mtd->priv;
++ int block;
++
++ block = (int)(page >> (this->bbt_erase_shift - this->page_shift - 1));
++ return (this->bbt[block >> 3] >> (block & 0x06)) & 0x03;
++}
++
++void nand_enable_clock(void)
++{
++ //enable_clock(MT65XX_PDN_PERI_NFI, "NAND");
++}
++
++void nand_disable_clock(void)
++{
++ //disable_clock(MT65XX_PDN_PERI_NFI, "NAND");
++}
++
++struct nand_ecclayout {
++ __u32 eccbytes;
++ __u32 eccpos[MTD_MAX_ECCPOS_ENTRIES_LARGE];
++ __u32 oobavail;
++ struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES_LARGE];
++};
++
++static struct nand_ecclayout *layout;
++
++static struct nand_ecclayout nand_oob_16 = {
++ .eccbytes = 8,
++ .eccpos = {8, 9, 10, 11, 12, 13, 14, 15},
++ .oobfree = {{1, 6}, {0, 0}}
++};
++
++struct nand_ecclayout nand_oob_64 = {
++ .eccbytes = 32,
++ .eccpos = {32, 33, 34, 35, 36, 37, 38, 39,
++ 40, 41, 42, 43, 44, 45, 46, 47,
++ 48, 49, 50, 51, 52, 53, 54, 55,
++ 56, 57, 58, 59, 60, 61, 62, 63},
++ .oobfree = {{1, 7}, {9, 7}, {17, 7}, {25, 6}, {0, 0}}
++};
++
++struct nand_ecclayout nand_oob_128 = {
++ .eccbytes = 64,
++ .eccpos = {
++ 64, 65, 66, 67, 68, 69, 70, 71,
++ 72, 73, 74, 75, 76, 77, 78, 79,
++ 80, 81, 82, 83, 84, 85, 86, 86,
++ 88, 89, 90, 91, 92, 93, 94, 95,
++ 96, 97, 98, 99, 100, 101, 102, 103,
++ 104, 105, 106, 107, 108, 109, 110, 111,
++ 112, 113, 114, 115, 116, 117, 118, 119,
++ 120, 121, 122, 123, 124, 125, 126, 127},
++ .oobfree = {{1, 7}, {9, 7}, {17, 7}, {25, 7}, {33, 7}, {41, 7}, {49, 7}, {57, 6}}
++};
++
++flashdev_info devinfo;
++
++void dump_nfi(void)
++{
++}
++
++void dump_ecc(void)
++{
++}
++
++u32
++nand_virt_to_phys_add(u32 va)
++{
++ u32 pageOffset = (va & (PAGE_SIZE - 1));
++ pgd_t *pgd;
++ pmd_t *pmd;
++ pte_t *pte;
++ u32 pa;
++
++ if (virt_addr_valid(va))
++ return __virt_to_phys(va);
++
++ if (NULL == current) {
++ printk(KERN_ERR "[nand_virt_to_phys_add] ERROR ,current is NULL! \n");
++ return 0;
++ }
++
++ if (NULL == current->mm) {
++ printk(KERN_ERR "[nand_virt_to_phys_add] ERROR current->mm is NULL! tgid=0x%x, name=%s \n", current->tgid, current->comm);
++ return 0;
++ }
++
++ pgd = pgd_offset(current->mm, va); /* what is tsk->mm */
++ if (pgd_none(*pgd) || pgd_bad(*pgd)) {
++ printk(KERN_ERR "[nand_virt_to_phys_add] ERROR, va=0x%x, pgd invalid! \n", va);
++ return 0;
++ }
++
++ pmd = pmd_offset((pud_t *)pgd, va);
++ if (pmd_none(*pmd) || pmd_bad(*pmd)) {
++ printk(KERN_ERR "[nand_virt_to_phys_add] ERROR, va=0x%x, pmd invalid! \n", va);
++ return 0;
++ }
++
++ pte = pte_offset_map(pmd, va);
++ if (pte_present(*pte)) {
++ pa = (pte_val(*pte) & (PAGE_MASK)) | pageOffset;
++ return pa;
++ }
++
++ printk(KERN_ERR "[nand_virt_to_phys_add] ERROR va=0x%x, pte invalid! \n", va);
++ return 0;
++}
++EXPORT_SYMBOL(nand_virt_to_phys_add);
++
++bool
++get_device_info(u16 id, u32 ext_id, flashdev_info * pdevinfo)
++{
++ u32 index;
++ for (index = 0; gen_FlashTable[index].id != 0; index++) {
++ if (id == gen_FlashTable[index].id && ext_id == gen_FlashTable[index].ext_id) {
++ pdevinfo->id = gen_FlashTable[index].id;
++ pdevinfo->ext_id = gen_FlashTable[index].ext_id;
++ pdevinfo->blocksize = gen_FlashTable[index].blocksize;
++ pdevinfo->addr_cycle = gen_FlashTable[index].addr_cycle;
++ pdevinfo->iowidth = gen_FlashTable[index].iowidth;
++ pdevinfo->timmingsetting = gen_FlashTable[index].timmingsetting;
++ pdevinfo->advancedmode = gen_FlashTable[index].advancedmode;
++ pdevinfo->pagesize = gen_FlashTable[index].pagesize;
++ pdevinfo->sparesize = gen_FlashTable[index].sparesize;
++ pdevinfo->totalsize = gen_FlashTable[index].totalsize;
++ memcpy(pdevinfo->devciename, gen_FlashTable[index].devciename, sizeof(pdevinfo->devciename));
++ printk(KERN_INFO "Device found in MTK table, ID: %x, EXT_ID: %x\n", id, ext_id);
++
++ goto find;
++ }
++ }
++
++find:
++ if (0 == pdevinfo->id) {
++ printk(KERN_INFO "Device not found, ID: %x\n", id);
++ return false;
++ } else {
++ return true;
++ }
++}
++
++static void
++ECC_Config(struct mtk_nand_host_hw *hw,u32 ecc_bit)
++{
++ u32 u4ENCODESize;
++ u32 u4DECODESize;
++ u32 ecc_bit_cfg = ECC_CNFG_ECC4;
++
++ switch(ecc_bit){
++ case 4:
++ ecc_bit_cfg = ECC_CNFG_ECC4;
++ break;
++ case 8:
++ ecc_bit_cfg = ECC_CNFG_ECC8;
++ break;
++ case 10:
++ ecc_bit_cfg = ECC_CNFG_ECC10;
++ break;
++ case 12:
++ ecc_bit_cfg = ECC_CNFG_ECC12;
++ break;
++ default:
++ break;
++ }
++ DRV_WriteReg16(ECC_DECCON_REG16, DEC_DE);
++ do {
++ } while (!DRV_Reg16(ECC_DECIDLE_REG16));
++
++ DRV_WriteReg16(ECC_ENCCON_REG16, ENC_DE);
++ do {
++ } while (!DRV_Reg32(ECC_ENCIDLE_REG32));
++
++ /* setup FDM register base */
++ DRV_WriteReg32(ECC_FDMADDR_REG32, NFI_FDM0L_REG32);
++
++ /* Sector + FDM */
++ u4ENCODESize = (hw->nand_sec_size + 8) << 3;
++ /* Sector + FDM + YAFFS2 meta data bits */
++ u4DECODESize = ((hw->nand_sec_size + 8) << 3) + ecc_bit * 13;
++
++ /* configure ECC decoder && encoder */
++ DRV_WriteReg32(ECC_DECCNFG_REG32, ecc_bit_cfg | DEC_CNFG_NFI | DEC_CNFG_EMPTY_EN | (u4DECODESize << DEC_CNFG_CODE_SHIFT));
++
++ DRV_WriteReg32(ECC_ENCCNFG_REG32, ecc_bit_cfg | ENC_CNFG_NFI | (u4ENCODESize << ENC_CNFG_MSG_SHIFT));
++ NFI_SET_REG32(ECC_DECCNFG_REG32, DEC_CNFG_EL);
++}
++
++static void
++ECC_Decode_Start(void)
++{
++ while (!(DRV_Reg16(ECC_DECIDLE_REG16) & DEC_IDLE))
++ ;
++ DRV_WriteReg16(ECC_DECCON_REG16, DEC_EN);
++}
++
++static void
++ECC_Decode_End(void)
++{
++ while (!(DRV_Reg16(ECC_DECIDLE_REG16) & DEC_IDLE))
++ ;
++ DRV_WriteReg16(ECC_DECCON_REG16, DEC_DE);
++}
++
++static void
++ECC_Encode_Start(void)
++{
++ while (!(DRV_Reg32(ECC_ENCIDLE_REG32) & ENC_IDLE))
++ ;
++ mb();
++ DRV_WriteReg16(ECC_ENCCON_REG16, ENC_EN);
++}
++
++static void
++ECC_Encode_End(void)
++{
++ /* wait for device returning idle */
++ while (!(DRV_Reg32(ECC_ENCIDLE_REG32) & ENC_IDLE)) ;
++ mb();
++ DRV_WriteReg16(ECC_ENCCON_REG16, ENC_DE);
++}
++
++static bool
++mtk_nand_check_bch_error(struct mtd_info *mtd, u8 * pDataBuf, u32 u4SecIndex, u32 u4PageAddr)
++{
++ bool bRet = true;
++ u16 u2SectorDoneMask = 1 << u4SecIndex;
++ u32 u4ErrorNumDebug, i, u4ErrNum;
++ u32 timeout = 0xFFFF;
++ // int el;
++ u32 au4ErrBitLoc[6];
++ u32 u4ErrByteLoc, u4BitOffset;
++ u32 u4ErrBitLoc1th, u4ErrBitLoc2nd;
++
++ //4 // Wait for Decode Done
++ while (0 == (u2SectorDoneMask & DRV_Reg16(ECC_DECDONE_REG16))) {
++ timeout--;
++ if (0 == timeout)
++ return false;
++ }
++ /* We will manually correct the error bits in the last sector, not all the sectors of the page! */
++ memset(au4ErrBitLoc, 0x0, sizeof(au4ErrBitLoc));
++ u4ErrorNumDebug = DRV_Reg32(ECC_DECENUM_REG32);
++ u4ErrNum = DRV_Reg32(ECC_DECENUM_REG32) >> (u4SecIndex << 2);
++ u4ErrNum &= 0xF;
++
++ if (u4ErrNum) {
++ if (0xF == u4ErrNum) {
++ mtd->ecc_stats.failed++;
++ bRet = false;
++ printk(KERN_ERR"mtk_nand: UnCorrectable at PageAddr=%d\n", u4PageAddr);
++ } else {
++ for (i = 0; i < ((u4ErrNum + 1) >> 1); ++i) {
++ au4ErrBitLoc[i] = DRV_Reg32(ECC_DECEL0_REG32 + i);
++ u4ErrBitLoc1th = au4ErrBitLoc[i] & 0x1FFF;
++ if (u4ErrBitLoc1th < 0x1000) {
++ u4ErrByteLoc = u4ErrBitLoc1th / 8;
++ u4BitOffset = u4ErrBitLoc1th % 8;
++ pDataBuf[u4ErrByteLoc] = pDataBuf[u4ErrByteLoc] ^ (1 << u4BitOffset);
++ mtd->ecc_stats.corrected++;
++ } else {
++ mtd->ecc_stats.failed++;
++ }
++ u4ErrBitLoc2nd = (au4ErrBitLoc[i] >> 16) & 0x1FFF;
++ if (0 != u4ErrBitLoc2nd) {
++ if (u4ErrBitLoc2nd < 0x1000) {
++ u4ErrByteLoc = u4ErrBitLoc2nd / 8;
++ u4BitOffset = u4ErrBitLoc2nd % 8;
++ pDataBuf[u4ErrByteLoc] = pDataBuf[u4ErrByteLoc] ^ (1 << u4BitOffset);
++ mtd->ecc_stats.corrected++;
++ } else {
++ mtd->ecc_stats.failed++;
++ //printk(KERN_ERR"UnCorrectable High ErrLoc=%d\n", au4ErrBitLoc[i]);
++ }
++ }
++ }
++ }
++ if (0 == (DRV_Reg16(ECC_DECFER_REG16) & (1 << u4SecIndex)))
++ bRet = false;
++ }
++ return bRet;
++}
++
++static bool
++mtk_nand_RFIFOValidSize(u16 u2Size)
++{
++ u32 timeout = 0xFFFF;
++ while (FIFO_RD_REMAIN(DRV_Reg16(NFI_FIFOSTA_REG16)) < u2Size) {
++ timeout--;
++ if (0 == timeout)
++ return false;
++ }
++ return true;
++}
++
++static bool
++mtk_nand_WFIFOValidSize(u16 u2Size)
++{
++ u32 timeout = 0xFFFF;
++
++ while (FIFO_WR_REMAIN(DRV_Reg16(NFI_FIFOSTA_REG16)) > u2Size) {
++ timeout--;
++ if (0 == timeout)
++ return false;
++ }
++ return true;
++}
++
++static bool
++mtk_nand_status_ready(u32 u4Status)
++{
++ u32 timeout = 0xFFFF;
++
++ while ((DRV_Reg32(NFI_STA_REG32) & u4Status) != 0) {
++ timeout--;
++ if (0 == timeout)
++ return false;
++ }
++ return true;
++}
++
++static bool
++mtk_nand_reset(void)
++{
++ int timeout = 0xFFFF;
++ if (DRV_Reg16(NFI_MASTERSTA_REG16)) {
++ mb();
++ DRV_WriteReg16(NFI_CON_REG16, CON_FIFO_FLUSH | CON_NFI_RST);
++ while (DRV_Reg16(NFI_MASTERSTA_REG16)) {
++ timeout--;
++ if (!timeout)
++ MSG(INIT, "Wait for NFI_MASTERSTA timeout\n");
++ }
++ }
++ /* issue reset operation */
++ mb();
++ DRV_WriteReg16(NFI_CON_REG16, CON_FIFO_FLUSH | CON_NFI_RST);
++
++ return mtk_nand_status_ready(STA_NFI_FSM_MASK | STA_NAND_BUSY) && mtk_nand_RFIFOValidSize(0) && mtk_nand_WFIFOValidSize(0);
++}
++
++static void
++mtk_nand_set_mode(u16 u2OpMode)
++{
++ u16 u2Mode = DRV_Reg16(NFI_CNFG_REG16);
++ u2Mode &= ~CNFG_OP_MODE_MASK;
++ u2Mode |= u2OpMode;
++ DRV_WriteReg16(NFI_CNFG_REG16, u2Mode);
++}
++
++static void
++mtk_nand_set_autoformat(bool bEnable)
++{
++ if (bEnable)
++ NFI_SET_REG16(NFI_CNFG_REG16, CNFG_AUTO_FMT_EN);
++ else
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_AUTO_FMT_EN);
++}
++
++static void
++mtk_nand_configure_fdm(u16 u2FDMSize)
++{
++ NFI_CLN_REG16(NFI_PAGEFMT_REG16, PAGEFMT_FDM_MASK | PAGEFMT_FDM_ECC_MASK);
++ NFI_SET_REG16(NFI_PAGEFMT_REG16, u2FDMSize << PAGEFMT_FDM_SHIFT);
++ NFI_SET_REG16(NFI_PAGEFMT_REG16, u2FDMSize << PAGEFMT_FDM_ECC_SHIFT);
++}
++
++static void
++mtk_nand_configure_lock(void)
++{
++ u32 u4WriteColNOB = 2;
++ u32 u4WriteRowNOB = 3;
++ u32 u4EraseColNOB = 0;
++ u32 u4EraseRowNOB = 3;
++ DRV_WriteReg16(NFI_LOCKANOB_REG16,
++ (u4WriteColNOB << PROG_CADD_NOB_SHIFT) | (u4WriteRowNOB << PROG_RADD_NOB_SHIFT) | (u4EraseColNOB << ERASE_CADD_NOB_SHIFT) | (u4EraseRowNOB << ERASE_RADD_NOB_SHIFT));
++
++ if (CHIPVER_ECO_1 == g_u4ChipVer) {
++ int i;
++ for (i = 0; i < 16; ++i) {
++ DRV_WriteReg32(NFI_LOCK00ADD_REG32 + (i << 1), 0xFFFFFFFF);
++ DRV_WriteReg32(NFI_LOCK00FMT_REG32 + (i << 1), 0xFFFFFFFF);
++ }
++ //DRV_WriteReg16(NFI_LOCKANOB_REG16, 0x0);
++ DRV_WriteReg32(NFI_LOCKCON_REG32, 0xFFFFFFFF);
++ DRV_WriteReg16(NFI_LOCK_REG16, NFI_LOCK_ON);
++ }
++}
++
++static bool
++mtk_nand_pio_ready(void)
++{
++ int count = 0;
++ while (!(DRV_Reg16(NFI_PIO_DIRDY_REG16) & 1)) {
++ count++;
++ if (count > 0xffff) {
++ printk("PIO_DIRDY timeout\n");
++ return false;
++ }
++ }
++
++ return true;
++}
++
++static bool
++mtk_nand_set_command(u16 command)
++{
++ mb();
++ DRV_WriteReg16(NFI_CMD_REG16, command);
++ return mtk_nand_status_ready(STA_CMD_STATE);
++}
++
++static bool
++mtk_nand_set_address(u32 u4ColAddr, u32 u4RowAddr, u16 u2ColNOB, u16 u2RowNOB)
++{
++ mb();
++ DRV_WriteReg32(NFI_COLADDR_REG32, u4ColAddr);
++ DRV_WriteReg32(NFI_ROWADDR_REG32, u4RowAddr);
++ DRV_WriteReg16(NFI_ADDRNOB_REG16, u2ColNOB | (u2RowNOB << ADDR_ROW_NOB_SHIFT));
++ return mtk_nand_status_ready(STA_ADDR_STATE);
++}
++
++static void mtk_nfc_cmd_ctrl(struct mtd_info *mtd, int dat, unsigned int ctrl)
++{
++ if (ctrl & NAND_ALE) {
++ mtk_nand_set_address(dat, 0, 1, 0);
++ } else if (ctrl & NAND_CLE) {
++ mtk_nand_reset();
++ mtk_nand_set_mode(0x6000);
++ mtk_nand_set_command(dat);
++ }
++}
++
++static bool
++mtk_nand_check_RW_count(u16 u2WriteSize)
++{
++ u32 timeout = 0xFFFF;
++ u16 u2SecNum = u2WriteSize >> 9;
++
++ while (ADDRCNTR_CNTR(DRV_Reg16(NFI_ADDRCNTR_REG16)) < u2SecNum) {
++ timeout--;
++ if (0 == timeout) {
++ printk(KERN_INFO "[%s] timeout\n", __FUNCTION__);
++ return false;
++ }
++ }
++ return true;
++}
++
++static bool
++mtk_nand_ready_for_read(struct nand_chip *nand, u32 u4RowAddr, u32 u4ColAddr, bool full, u8 * buf)
++{
++ /* Reset NFI HW internal state machine and flush NFI in/out FIFO */
++ bool bRet = false;
++ u16 sec_num = 1 << (nand->page_shift - 9);
++ u32 col_addr = u4ColAddr;
++ u32 colnob = 2, rownob = devinfo.addr_cycle - 2;
++ if (nand->options & NAND_BUSWIDTH_16)
++ col_addr /= 2;
++
++ if (!mtk_nand_reset())
++ goto cleanup;
++ if (g_bHwEcc) {
++ NFI_SET_REG16(NFI_CNFG_REG16, CNFG_HW_ECC_EN);
++ } else {
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_HW_ECC_EN);
++ }
++
++ mtk_nand_set_mode(CNFG_OP_READ);
++ NFI_SET_REG16(NFI_CNFG_REG16, CNFG_READ_EN);
++ DRV_WriteReg16(NFI_CON_REG16, sec_num << CON_NFI_SEC_SHIFT);
++
++ if (full) {
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_AHB);
++
++ if (g_bHwEcc)
++ NFI_SET_REG16(NFI_CNFG_REG16, CNFG_HW_ECC_EN);
++ else
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_HW_ECC_EN);
++ } else {
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_HW_ECC_EN);
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_AHB);
++ }
++
++ mtk_nand_set_autoformat(full);
++ if (full)
++ if (g_bHwEcc)
++ ECC_Decode_Start();
++ if (!mtk_nand_set_command(NAND_CMD_READ0))
++ goto cleanup;
++ if (!mtk_nand_set_address(col_addr, u4RowAddr, colnob, rownob))
++ goto cleanup;
++ if (!mtk_nand_set_command(NAND_CMD_READSTART))
++ goto cleanup;
++ if (!mtk_nand_status_ready(STA_NAND_BUSY))
++ goto cleanup;
++
++ bRet = true;
++
++cleanup:
++ return bRet;
++}
++
++static bool
++mtk_nand_ready_for_write(struct nand_chip *nand, u32 u4RowAddr, u32 col_addr, bool full, u8 * buf)
++{
++ bool bRet = false;
++ u32 sec_num = 1 << (nand->page_shift - 9);
++ u32 colnob = 2, rownob = devinfo.addr_cycle - 2;
++ if (nand->options & NAND_BUSWIDTH_16)
++ col_addr /= 2;
++
++ /* Reset NFI HW internal state machine and flush NFI in/out FIFO */
++ if (!mtk_nand_reset())
++ return false;
++
++ mtk_nand_set_mode(CNFG_OP_PRGM);
++
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_READ_EN);
++
++ DRV_WriteReg16(NFI_CON_REG16, sec_num << CON_NFI_SEC_SHIFT);
++
++ if (full) {
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_AHB);
++ if (g_bHwEcc)
++ NFI_SET_REG16(NFI_CNFG_REG16, CNFG_HW_ECC_EN);
++ else
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_HW_ECC_EN);
++ } else {
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_HW_ECC_EN);
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_AHB);
++ }
++
++ mtk_nand_set_autoformat(full);
++
++ if (full)
++ if (g_bHwEcc)
++ ECC_Encode_Start();
++
++ if (!mtk_nand_set_command(NAND_CMD_SEQIN))
++ goto cleanup;
++ //1 FIXED ME: For Any Kind of AddrCycle
++ if (!mtk_nand_set_address(col_addr, u4RowAddr, colnob, rownob))
++ goto cleanup;
++
++ if (!mtk_nand_status_ready(STA_NAND_BUSY))
++ goto cleanup;
++
++ bRet = true;
++
++cleanup:
++ return bRet;
++}
++
++static bool
++mtk_nand_check_dececc_done(u32 u4SecNum)
++{
++ u32 timeout, dec_mask;
++
++ timeout = 0xffff;
++ dec_mask = (1 << u4SecNum) - 1;
++ while ((dec_mask != DRV_Reg(ECC_DECDONE_REG16)) && timeout > 0)
++ timeout--;
++ if (timeout == 0) {
++ MSG(VERIFY, "ECC_DECDONE: timeout\n");
++ return false;
++ }
++ return true;
++}
++
++static bool
++mtk_nand_mcu_read_data(u8 * buf, u32 length)
++{
++ int timeout = 0xffff;
++ u32 i;
++ u32 *buf32 = (u32 *) buf;
++ if ((u32) buf % 4 || length % 4)
++ NFI_SET_REG16(NFI_CNFG_REG16, CNFG_BYTE_RW);
++ else
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_BYTE_RW);
++
++ //DRV_WriteReg32(NFI_STRADDR_REG32, 0);
++ mb();
++ NFI_SET_REG16(NFI_CON_REG16, CON_NFI_BRD);
++
++ if ((u32) buf % 4 || length % 4) {
++ for (i = 0; (i < (length)) && (timeout > 0);) {
++ if (DRV_Reg16(NFI_PIO_DIRDY_REG16) & 1) {
++ *buf++ = (u8) DRV_Reg32(NFI_DATAR_REG32);
++ i++;
++ } else {
++ timeout--;
++ }
++ if (0 == timeout) {
++ printk(KERN_ERR "[%s] timeout\n", __FUNCTION__);
++ dump_nfi();
++ return false;
++ }
++ }
++ } else {
++ for (i = 0; (i < (length >> 2)) && (timeout > 0);) {
++ if (DRV_Reg16(NFI_PIO_DIRDY_REG16) & 1) {
++ *buf32++ = DRV_Reg32(NFI_DATAR_REG32);
++ i++;
++ } else {
++ timeout--;
++ }
++ if (0 == timeout) {
++ printk(KERN_ERR "[%s] timeout\n", __FUNCTION__);
++ dump_nfi();
++ return false;
++ }
++ }
++ }
++ return true;
++}
++
++static bool
++mtk_nand_read_page_data(struct mtd_info *mtd, u8 * pDataBuf, u32 u4Size)
++{
++ return mtk_nand_mcu_read_data(pDataBuf, u4Size);
++}
++
++static bool
++mtk_nand_mcu_write_data(struct mtd_info *mtd, const u8 * buf, u32 length)
++{
++ u32 timeout = 0xFFFF;
++ u32 i;
++ u32 *pBuf32;
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_BYTE_RW);
++ mb();
++ NFI_SET_REG16(NFI_CON_REG16, CON_NFI_BWR);
++ pBuf32 = (u32 *) buf;
++
++ if ((u32) buf % 4 || length % 4)
++ NFI_SET_REG16(NFI_CNFG_REG16, CNFG_BYTE_RW);
++ else
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_BYTE_RW);
++
++ if ((u32) buf % 4 || length % 4) {
++ for (i = 0; (i < (length)) && (timeout > 0);) {
++ if (DRV_Reg16(NFI_PIO_DIRDY_REG16) & 1) {
++ DRV_WriteReg32(NFI_DATAW_REG32, *buf++);
++ i++;
++ } else {
++ timeout--;
++ }
++ if (0 == timeout) {
++ printk(KERN_ERR "[%s] timeout\n", __FUNCTION__);
++ dump_nfi();
++ return false;
++ }
++ }
++ } else {
++ for (i = 0; (i < (length >> 2)) && (timeout > 0);) {
++ if (DRV_Reg16(NFI_PIO_DIRDY_REG16) & 1) {
++ DRV_WriteReg32(NFI_DATAW_REG32, *pBuf32++);
++ i++;
++ } else {
++ timeout--;
++ }
++ if (0 == timeout) {
++ printk(KERN_ERR "[%s] timeout\n", __FUNCTION__);
++ dump_nfi();
++ return false;
++ }
++ }
++ }
++
++ return true;
++}
++
++static bool
++mtk_nand_write_page_data(struct mtd_info *mtd, u8 * buf, u32 size)
++{
++ return mtk_nand_mcu_write_data(mtd, buf, size);
++}
++
++static void
++mtk_nand_read_fdm_data(u8 * pDataBuf, u32 u4SecNum)
++{
++ u32 i;
++ u32 *pBuf32 = (u32 *) pDataBuf;
++
++ if (pBuf32) {
++ for (i = 0; i < u4SecNum; ++i) {
++ *pBuf32++ = DRV_Reg32(NFI_FDM0L_REG32 + (i << 1));
++ *pBuf32++ = DRV_Reg32(NFI_FDM0M_REG32 + (i << 1));
++ }
++ }
++}
++
++static u8 fdm_buf[64];
++static void
++mtk_nand_write_fdm_data(struct nand_chip *chip, u8 * pDataBuf, u32 u4SecNum)
++{
++ u32 i, j;
++ u8 checksum = 0;
++ bool empty = true;
++ struct nand_oobfree *free_entry;
++ u32 *pBuf32;
++
++ memcpy(fdm_buf, pDataBuf, u4SecNum * 8);
++
++ free_entry = layout->oobfree;
++ for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES && free_entry[i].length; i++) {
++ for (j = 0; j < free_entry[i].length; j++) {
++ if (pDataBuf[free_entry[i].offset + j] != 0xFF)
++ empty = false;
++ checksum ^= pDataBuf[free_entry[i].offset + j];
++ }
++ }
++
++ if (!empty) {
++ fdm_buf[free_entry[i - 1].offset + free_entry[i - 1].length] = checksum;
++ }
++
++ pBuf32 = (u32 *) fdm_buf;
++ for (i = 0; i < u4SecNum; ++i) {
++ DRV_WriteReg32(NFI_FDM0L_REG32 + (i << 1), *pBuf32++);
++ DRV_WriteReg32(NFI_FDM0M_REG32 + (i << 1), *pBuf32++);
++ }
++}
++
++static void
++mtk_nand_stop_read(void)
++{
++ NFI_CLN_REG16(NFI_CON_REG16, CON_NFI_BRD);
++ mtk_nand_reset();
++ if (g_bHwEcc)
++ ECC_Decode_End();
++ DRV_WriteReg16(NFI_INTR_EN_REG16, 0);
++}
++
++static void
++mtk_nand_stop_write(void)
++{
++ NFI_CLN_REG16(NFI_CON_REG16, CON_NFI_BWR);
++ if (g_bHwEcc)
++ ECC_Encode_End();
++ DRV_WriteReg16(NFI_INTR_EN_REG16, 0);
++}
++
++bool
++mtk_nand_exec_read_page(struct mtd_info *mtd, u32 u4RowAddr, u32 u4PageSize, u8 * pPageBuf, u8 * pFDMBuf)
++{
++ u8 *buf;
++ bool bRet = true;
++ struct nand_chip *nand = mtd->priv;
++ u32 u4SecNum = u4PageSize >> 9;
++
++ buf = pPageBuf;
++ if (mtk_nand_ready_for_read(nand, u4RowAddr, 0, true, buf)) {
++ int j;
++ for (j = 0 ; j < u4SecNum; j++) {
++ if (!mtk_nand_read_page_data(mtd, buf+j*512, 512))
++ bRet = false;
++ if(g_bHwEcc && !mtk_nand_check_dececc_done(j+1))
++ bRet = false;
++ if(g_bHwEcc && !mtk_nand_check_bch_error(mtd, buf+j*512, j, u4RowAddr))
++ bRet = false;
++ }
++ if (!mtk_nand_status_ready(STA_NAND_BUSY))
++ bRet = false;
++
++ mtk_nand_read_fdm_data(pFDMBuf, u4SecNum);
++ mtk_nand_stop_read();
++ }
++
++ return bRet;
++}
++
++int
++mtk_nand_exec_write_page(struct mtd_info *mtd, u32 u4RowAddr, u32 u4PageSize, u8 * pPageBuf, u8 * pFDMBuf)
++{
++ struct nand_chip *chip = mtd->priv;
++ u32 u4SecNum = u4PageSize >> 9;
++ u8 *buf;
++ u8 status;
++
++ MSG(WRITE, "mtk_nand_exec_write_page, page: 0x%x\n", u4RowAddr);
++
++ buf = pPageBuf;
++
++ if (mtk_nand_ready_for_write(chip, u4RowAddr, 0, true, buf)) {
++ mtk_nand_write_fdm_data(chip, pFDMBuf, u4SecNum);
++ (void)mtk_nand_write_page_data(mtd, buf, u4PageSize);
++ (void)mtk_nand_check_RW_count(u4PageSize);
++ mtk_nand_stop_write();
++ (void)mtk_nand_set_command(NAND_CMD_PAGEPROG);
++ while (DRV_Reg32(NFI_STA_REG32) & STA_NAND_BUSY) ;
++ }
++
++ status = chip->waitfunc(mtd, chip);
++ if (status & NAND_STATUS_FAIL)
++ return -EIO;
++ return 0;
++}
++
++static int
++get_start_end_block(struct mtd_info *mtd, int block, int *start_blk, int *end_blk)
++{
++ struct nand_chip *chip = mtd->priv;
++ int i;
++
++ *start_blk = 0;
++ for (i = 0; i <= part_num; i++)
++ {
++ if (i == part_num)
++ {
++ // try the last reset partition
++ *end_blk = (chip->chipsize >> chip->phys_erase_shift) - 1;
++ if (*start_blk <= *end_blk)
++ {
++ if ((block >= *start_blk) && (block <= *end_blk))
++ break;
++ }
++ }
++ // skip All partition entry
++ else if (g_pasStatic_Partition[i].size == MTDPART_SIZ_FULL)
++ {
++ continue;
++ }
++ *end_blk = *start_blk + (g_pasStatic_Partition[i].size >> chip->phys_erase_shift) - 1;
++ if ((block >= *start_blk) && (block <= *end_blk))
++ break;
++ *start_blk = *end_blk + 1;
++ }
++ if (*start_blk > *end_blk)
++ {
++ return -1;
++ }
++ return 0;
++}
++
++static int
++block_remap(struct mtd_info *mtd, int block)
++{
++ struct nand_chip *chip = mtd->priv;
++ int start_blk, end_blk;
++ int j, block_offset;
++ int bad_block = 0;
++
++ if (chip->bbt == NULL) {
++ printk("ERROR!! no bbt table for block_remap\n");
++ return -1;
++ }
++
++ if (get_start_end_block(mtd, block, &start_blk, &end_blk) < 0) {
++ printk("ERROR!! can not find start_blk and end_blk\n");
++ return -1;
++ }
++
++ block_offset = block - start_blk;
++ for (j = start_blk; j <= end_blk;j++) {
++ if (((chip->bbt[j >> 2] >> ((j<<1) & 0x6)) & 0x3) == 0x0) {
++ if (!block_offset)
++ break;
++ block_offset--;
++ } else {
++ bad_block++;
++ }
++ }
++ if (j <= end_blk) {
++ return j;
++ } else {
++ // remap to the bad block
++ for (j = end_blk; bad_block > 0; j--)
++ {
++ if (((chip->bbt[j >> 2] >> ((j<<1) & 0x6)) & 0x3) != 0x0)
++ {
++ bad_block--;
++ if (bad_block <= block_offset)
++ return j;
++ }
++ }
++ }
++
++ printk("Error!! block_remap error\n");
++ return -1;
++}
++
++int
++check_block_remap(struct mtd_info *mtd, int block)
++{
++ if (shift_on_bbt)
++ return block_remap(mtd, block);
++ else
++ return block;
++}
++EXPORT_SYMBOL(check_block_remap);
++
++
++static int
++write_next_on_fail(struct mtd_info *mtd, char *write_buf, int page, int * to_blk)
++{
++ struct nand_chip *chip = mtd->priv;
++ int i, j, to_page = 0, first_page;
++ char *buf, *oob;
++ int start_blk = 0, end_blk;
++ int mapped_block;
++ int page_per_block_bit = chip->phys_erase_shift - chip->page_shift;
++ int block = page >> page_per_block_bit;
++
++ // find next available block in the same MTD partition
++ mapped_block = block_remap(mtd, block);
++ if (mapped_block == -1)
++ return NAND_STATUS_FAIL;
++
++ get_start_end_block(mtd, block, &start_blk, &end_blk);
++
++ buf = kzalloc(mtd->writesize + mtd->oobsize, GFP_KERNEL | GFP_DMA);
++ if (buf == NULL)
++ return -1;
++
++ oob = buf + mtd->writesize;
++ for ((*to_blk) = block + 1; (*to_blk) <= end_blk ; (*to_blk)++) {
++ if (nand_bbt_get(mtd, (*to_blk) << page_per_block_bit) == 0) {
++ int status;
++ status = mtk_nand_erase_hw(mtd, (*to_blk) << page_per_block_bit);
++ if (status & NAND_STATUS_FAIL) {
++ mtk_nand_block_markbad_hw(mtd, (*to_blk) << chip->phys_erase_shift);
++ nand_bbt_set(mtd, (*to_blk) << page_per_block_bit, 0x3);
++ } else {
++ /* good block */
++ to_page = (*to_blk) << page_per_block_bit;
++ break;
++ }
++ }
++ }
++
++ if (!to_page) {
++ kfree(buf);
++ return -1;
++ }
++
++ first_page = (page >> page_per_block_bit) << page_per_block_bit;
++ for (i = 0; i < (1 << page_per_block_bit); i++) {
++ if ((first_page + i) != page) {
++ mtk_nand_read_oob_hw(mtd, chip, (first_page+i));
++ for (j = 0; j < mtd->oobsize; j++)
++ if (chip->oob_poi[j] != (unsigned char)0xff)
++ break;
++ if (j < mtd->oobsize) {
++ mtk_nand_exec_read_page(mtd, (first_page+i), mtd->writesize, buf, oob);
++ memset(oob, 0xff, mtd->oobsize);
++ if (mtk_nand_exec_write_page(mtd, to_page + i, mtd->writesize, (u8 *)buf, oob) != 0) {
++ int ret, new_blk = 0;
++ nand_bbt_set(mtd, to_page, 0x3);
++ ret = write_next_on_fail(mtd, buf, to_page + i, &new_blk);
++ if (ret) {
++ kfree(buf);
++ mtk_nand_block_markbad_hw(mtd, to_page << chip->page_shift);
++ return ret;
++ }
++ mtk_nand_block_markbad_hw(mtd, to_page << chip->page_shift);
++ *to_blk = new_blk;
++ to_page = ((*to_blk) << page_per_block_bit);
++ }
++ }
++ } else {
++ memset(chip->oob_poi, 0xff, mtd->oobsize);
++ if (mtk_nand_exec_write_page(mtd, to_page + i, mtd->writesize, (u8 *)write_buf, chip->oob_poi) != 0) {
++ int ret, new_blk = 0;
++ nand_bbt_set(mtd, to_page, 0x3);
++ ret = write_next_on_fail(mtd, write_buf, to_page + i, &new_blk);
++ if (ret) {
++ kfree(buf);
++ mtk_nand_block_markbad_hw(mtd, to_page << chip->page_shift);
++ return ret;
++ }
++ mtk_nand_block_markbad_hw(mtd, to_page << chip->page_shift);
++ *to_blk = new_blk;
++ to_page = ((*to_blk) << page_per_block_bit);
++ }
++ }
++ }
++
++ kfree(buf);
++
++ return 0;
++}
++
++static int
++mtk_nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, uint32_t offset,
++ int data_len, const u8 * buf, int oob_required, int page, int raw)
++{
++ int page_per_block = 1 << (chip->phys_erase_shift - chip->page_shift);
++ int block = page / page_per_block;
++ u16 page_in_block = page % page_per_block;
++ int mapped_block = block;
++
++#if defined(MTK_NAND_BMT)
++ mapped_block = get_mapping_block_index(block);
++ // write bad index into oob
++ if (mapped_block != block)
++ set_bad_index_to_oob(chip->oob_poi, block);
++ else
++ set_bad_index_to_oob(chip->oob_poi, FAKE_INDEX);
++#else
++ if (shift_on_bbt) {
++ mapped_block = block_remap(mtd, block);
++ if (mapped_block == -1)
++ return NAND_STATUS_FAIL;
++ if (nand_bbt_get(mtd, mapped_block << (chip->phys_erase_shift - chip->page_shift)) != 0x0)
++ return NAND_STATUS_FAIL;
++ }
++#endif
++ do {
++ if (mtk_nand_exec_write_page(mtd, page_in_block + mapped_block * page_per_block, mtd->writesize, (u8 *)buf, chip->oob_poi)) {
++ MSG(INIT, "write fail at block: 0x%x, page: 0x%x\n", mapped_block, page_in_block);
++#if defined(MTK_NAND_BMT)
++ if (update_bmt((page_in_block + mapped_block * page_per_block) << chip->page_shift, UPDATE_WRITE_FAIL, (u8 *) buf, chip->oob_poi)) {
++ MSG(INIT, "Update BMT success\n");
++ return 0;
++ } else {
++ MSG(INIT, "Update BMT fail\n");
++ return -EIO;
++ }
++#else
++ {
++ int new_blk;
++ nand_bbt_set(mtd, page_in_block + mapped_block * page_per_block, 0x3);
++ if (write_next_on_fail(mtd, (char *)buf, page_in_block + mapped_block * page_per_block, &new_blk) != 0)
++ {
++ mtk_nand_block_markbad_hw(mtd, (page_in_block + mapped_block * page_per_block) << chip->page_shift);
++ return NAND_STATUS_FAIL;
++ }
++ mtk_nand_block_markbad_hw(mtd, (page_in_block + mapped_block * page_per_block) << chip->page_shift);
++ break;
++ }
++#endif
++ } else
++ break;
++ } while(1);
++
++ return 0;
++}
++
++static void
++mtk_nand_command_bp(struct mtd_info *mtd, unsigned int command, int column, int page_addr)
++{
++ struct nand_chip *nand = mtd->priv;
++
++ switch (command) {
++ case NAND_CMD_SEQIN:
++ memset(g_kCMD.au1OOB, 0xFF, sizeof(g_kCMD.au1OOB));
++ g_kCMD.pDataBuf = NULL;
++ g_kCMD.u4RowAddr = page_addr;
++ g_kCMD.u4ColAddr = column;
++ break;
++
++ case NAND_CMD_PAGEPROG:
++ if (g_kCMD.pDataBuf || (0xFF != g_kCMD.au1OOB[nand_badblock_offset])) {
++ u8 *pDataBuf = g_kCMD.pDataBuf ? g_kCMD.pDataBuf : nand->buffers->databuf;
++ mtk_nand_exec_write_page(mtd, g_kCMD.u4RowAddr, mtd->writesize, pDataBuf, g_kCMD.au1OOB);
++ g_kCMD.u4RowAddr = (u32) - 1;
++ g_kCMD.u4OOBRowAddr = (u32) - 1;
++ }
++ break;
++
++ case NAND_CMD_READOOB:
++ g_kCMD.u4RowAddr = page_addr;
++ g_kCMD.u4ColAddr = column + mtd->writesize;
++ break;
++
++ case NAND_CMD_READ0:
++ g_kCMD.u4RowAddr = page_addr;
++ g_kCMD.u4ColAddr = column;
++ break;
++
++ case NAND_CMD_ERASE1:
++ nand->state=FL_ERASING;
++ (void)mtk_nand_reset();
++ mtk_nand_set_mode(CNFG_OP_ERASE);
++ (void)mtk_nand_set_command(NAND_CMD_ERASE1);
++ (void)mtk_nand_set_address(0, page_addr, 0, devinfo.addr_cycle - 2);
++ break;
++
++ case NAND_CMD_ERASE2:
++ (void)mtk_nand_set_command(NAND_CMD_ERASE2);
++ while (DRV_Reg32(NFI_STA_REG32) & STA_NAND_BUSY)
++ ;
++ break;
++
++ case NAND_CMD_STATUS:
++ (void)mtk_nand_reset();
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_BYTE_RW);
++ mtk_nand_set_mode(CNFG_OP_SRD);
++ mtk_nand_set_mode(CNFG_READ_EN);
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_AHB);
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_HW_ECC_EN);
++ (void)mtk_nand_set_command(NAND_CMD_STATUS);
++ NFI_CLN_REG16(NFI_CON_REG16, CON_NFI_NOB_MASK);
++ mb();
++ DRV_WriteReg16(NFI_CON_REG16, CON_NFI_SRD | (1 << CON_NFI_NOB_SHIFT));
++ g_bcmdstatus = true;
++ break;
++
++ case NAND_CMD_RESET:
++ (void)mtk_nand_reset();
++ DRV_WriteReg16(NFI_INTR_EN_REG16, INTR_RST_DONE_EN);
++ (void)mtk_nand_set_command(NAND_CMD_RESET);
++ DRV_WriteReg16(NFI_BASE+0x44, 0xF1);
++ while(!(DRV_Reg16(NFI_INTR_REG16)&INTR_RST_DONE_EN))
++ ;
++ break;
++
++ case NAND_CMD_READID:
++ mtk_nand_reset();
++ /* Disable HW ECC */
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_HW_ECC_EN);
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_AHB);
++ NFI_SET_REG16(NFI_CNFG_REG16, CNFG_READ_EN | CNFG_BYTE_RW);
++ (void)mtk_nand_reset();
++ mb();
++ mtk_nand_set_mode(CNFG_OP_SRD);
++ (void)mtk_nand_set_command(NAND_CMD_READID);
++ (void)mtk_nand_set_address(0, 0, 1, 0);
++ DRV_WriteReg16(NFI_CON_REG16, CON_NFI_SRD);
++ while (DRV_Reg32(NFI_STA_REG32) & STA_DATAR_STATE)
++ ;
++ break;
++
++ default:
++ BUG();
++ break;
++ }
++}
++
++static void
++mtk_nand_select_chip(struct mtd_info *mtd, int chip)
++{
++ if ((chip == -1) && (false == g_bInitDone)) {
++ struct nand_chip *nand = mtd->priv;
++ struct mtk_nand_host *host = nand->priv;
++ struct mtk_nand_host_hw *hw = host->hw;
++ u32 spare_per_sector = mtd->oobsize / (mtd->writesize / 512);
++ u32 ecc_bit = 4;
++ u32 spare_bit = PAGEFMT_SPARE_16;
++
++ if (spare_per_sector >= 28) {
++ spare_bit = PAGEFMT_SPARE_28;
++ ecc_bit = 12;
++ spare_per_sector = 28;
++ } else if (spare_per_sector >= 27) {
++ spare_bit = PAGEFMT_SPARE_27;
++ ecc_bit = 8;
++ spare_per_sector = 27;
++ } else if (spare_per_sector >= 26) {
++ spare_bit = PAGEFMT_SPARE_26;
++ ecc_bit = 8;
++ spare_per_sector = 26;
++ } else if (spare_per_sector >= 16) {
++ spare_bit = PAGEFMT_SPARE_16;
++ ecc_bit = 4;
++ spare_per_sector = 16;
++ } else {
++ MSG(INIT, "[NAND]: NFI not support oobsize: %x\n", spare_per_sector);
++ ASSERT(0);
++ }
++ mtd->oobsize = spare_per_sector*(mtd->writesize/512);
++ MSG(INIT, "[NAND]select ecc bit:%d, sparesize :%d spare_per_sector=%d\n",ecc_bit,mtd->oobsize,spare_per_sector);
++ /* Setup PageFormat */
++ if (4096 == mtd->writesize) {
++ NFI_SET_REG16(NFI_PAGEFMT_REG16, (spare_bit << PAGEFMT_SPARE_SHIFT) | PAGEFMT_4K);
++ nand->cmdfunc = mtk_nand_command_bp;
++ } else if (2048 == mtd->writesize) {
++ NFI_SET_REG16(NFI_PAGEFMT_REG16, (spare_bit << PAGEFMT_SPARE_SHIFT) | PAGEFMT_2K);
++ nand->cmdfunc = mtk_nand_command_bp;
++ }
++ ECC_Config(hw,ecc_bit);
++ g_bInitDone = true;
++ }
++ switch (chip) {
++ case -1:
++ break;
++ case 0:
++ case 1:
++ /* Jun Shen, 2011.04.13 */
++ /* Note: MT6577 EVB NAND is mounted on CS0, but FPGA is CS1 */
++ DRV_WriteReg16(NFI_CSEL_REG16, chip);
++ /* Jun Shen, 2011.04.13 */
++ break;
++ }
++}
++
++static uint8_t
++mtk_nand_read_byte(struct mtd_info *mtd)
++{
++ uint8_t retval = 0;
++
++ if (!mtk_nand_pio_ready()) {
++ printk("pio ready timeout\n");
++ retval = false;
++ }
++
++ if (g_bcmdstatus) {
++ retval = DRV_Reg8(NFI_DATAR_REG32);
++ NFI_CLN_REG16(NFI_CON_REG16, CON_NFI_NOB_MASK);
++ mtk_nand_reset();
++ if (g_bHwEcc) {
++ NFI_SET_REG16(NFI_CNFG_REG16, CNFG_HW_ECC_EN);
++ } else {
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_HW_ECC_EN);
++ }
++ g_bcmdstatus = false;
++ } else
++ retval = DRV_Reg8(NFI_DATAR_REG32);
++
++ return retval;
++}
++
++static void
++mtk_nand_read_buf(struct mtd_info *mtd, uint8_t * buf, int len)
++{
++ struct nand_chip *nand = (struct nand_chip *)mtd->priv;
++ struct NAND_CMD *pkCMD = &g_kCMD;
++ u32 u4ColAddr = pkCMD->u4ColAddr;
++ u32 u4PageSize = mtd->writesize;
++
++ if (u4ColAddr < u4PageSize) {
++ if ((u4ColAddr == 0) && (len >= u4PageSize)) {
++ mtk_nand_exec_read_page(mtd, pkCMD->u4RowAddr, u4PageSize, buf, pkCMD->au1OOB);
++ if (len > u4PageSize) {
++ u32 u4Size = min(len - u4PageSize, sizeof(pkCMD->au1OOB));
++ memcpy(buf + u4PageSize, pkCMD->au1OOB, u4Size);
++ }
++ } else {
++ mtk_nand_exec_read_page(mtd, pkCMD->u4RowAddr, u4PageSize, nand->buffers->databuf, pkCMD->au1OOB);
++ memcpy(buf, nand->buffers->databuf + u4ColAddr, len);
++ }
++ pkCMD->u4OOBRowAddr = pkCMD->u4RowAddr;
++ } else {
++ u32 u4Offset = u4ColAddr - u4PageSize;
++ u32 u4Size = min(len - u4Offset, sizeof(pkCMD->au1OOB));
++ if (pkCMD->u4OOBRowAddr != pkCMD->u4RowAddr) {
++ mtk_nand_exec_read_page(mtd, pkCMD->u4RowAddr, u4PageSize, nand->buffers->databuf, pkCMD->au1OOB);
++ pkCMD->u4OOBRowAddr = pkCMD->u4RowAddr;
++ }
++ memcpy(buf, pkCMD->au1OOB + u4Offset, u4Size);
++ }
++ pkCMD->u4ColAddr += len;
++}
++
++static void
++mtk_nand_write_buf(struct mtd_info *mtd, const uint8_t * buf, int len)
++{
++ struct NAND_CMD *pkCMD = &g_kCMD;
++ u32 u4ColAddr = pkCMD->u4ColAddr;
++ u32 u4PageSize = mtd->writesize;
++ int i4Size, i;
++
++ if (u4ColAddr >= u4PageSize) {
++ u32 u4Offset = u4ColAddr - u4PageSize;
++ u8 *pOOB = pkCMD->au1OOB + u4Offset;
++ i4Size = min(len, (int)(sizeof(pkCMD->au1OOB) - u4Offset));
++ for (i = 0; i < i4Size; i++) {
++ pOOB[i] &= buf[i];
++ }
++ } else {
++ pkCMD->pDataBuf = (u8 *) buf;
++ }
++
++ pkCMD->u4ColAddr += len;
++}
++
++static int
++mtk_nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, const uint8_t * buf, int oob_required, int page)
++{
++ mtk_nand_write_buf(mtd, buf, mtd->writesize);
++ mtk_nand_write_buf(mtd, chip->oob_poi, mtd->oobsize);
++ return 0;
++}
++
++static int
++mtk_nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, uint8_t * buf, int oob_required, int page)
++{
++ struct NAND_CMD *pkCMD = &g_kCMD;
++ u32 u4ColAddr = pkCMD->u4ColAddr;
++ u32 u4PageSize = mtd->writesize;
++
++ if (u4ColAddr == 0) {
++ mtk_nand_exec_read_page(mtd, pkCMD->u4RowAddr, u4PageSize, buf, chip->oob_poi);
++ pkCMD->u4ColAddr += u4PageSize + mtd->oobsize;
++ }
++
++ return 0;
++}
++
++static int
++mtk_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip, u8 * buf, int page)
++{
++ int page_per_block = 1 << (chip->phys_erase_shift - chip->page_shift);
++ int block = page / page_per_block;
++ u16 page_in_block = page % page_per_block;
++ int mapped_block = block;
++
++#if defined (MTK_NAND_BMT)
++ mapped_block = get_mapping_block_index(block);
++ if (mtk_nand_exec_read_page(mtd, page_in_block + mapped_block * page_per_block,
++ mtd->writesize, buf, chip->oob_poi))
++ return 0;
++#else
++ if (shift_on_bbt) {
++ mapped_block = block_remap(mtd, block);
++ if (mapped_block == -1)
++ return NAND_STATUS_FAIL;
++ if (nand_bbt_get(mtd, mapped_block << (chip->phys_erase_shift - chip->page_shift)) != 0x0)
++ return NAND_STATUS_FAIL;
++ }
++
++ if (mtk_nand_exec_read_page(mtd, page_in_block + mapped_block * page_per_block, mtd->writesize, buf, chip->oob_poi))
++ return 0;
++ else
++ return -EIO;
++#endif
++}
++
++int
++mtk_nand_erase_hw(struct mtd_info *mtd, int page)
++{
++ struct nand_chip *chip = (struct nand_chip *)mtd->priv;
++
++ chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page);
++ chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1);
++
++ return chip->waitfunc(mtd, chip);
++}
++
++static int
++mtk_nand_erase(struct mtd_info *mtd, int page)
++{
++ // get mapping
++ struct nand_chip *chip = mtd->priv;
++ int page_per_block = 1 << (chip->phys_erase_shift - chip->page_shift);
++ int page_in_block = page % page_per_block;
++ int block = page / page_per_block;
++ int mapped_block = block;
++
++#if defined(MTK_NAND_BMT)
++ mapped_block = get_mapping_block_index(block);
++#else
++ if (shift_on_bbt) {
++ mapped_block = block_remap(mtd, block);
++ if (mapped_block == -1)
++ return NAND_STATUS_FAIL;
++ if (nand_bbt_get(mtd, mapped_block << (chip->phys_erase_shift - chip->page_shift)) != 0x0)
++ return NAND_STATUS_FAIL;
++ }
++#endif
++
++ do {
++ int status = mtk_nand_erase_hw(mtd, page_in_block + page_per_block * mapped_block);
++
++ if (status & NAND_STATUS_FAIL) {
++#if defined (MTK_NAND_BMT)
++ if (update_bmt( (page_in_block + mapped_block * page_per_block) << chip->page_shift,
++ UPDATE_ERASE_FAIL, NULL, NULL))
++ {
++ MSG(INIT, "Erase fail at block: 0x%x, update BMT success\n", mapped_block);
++ return 0;
++ } else {
++ MSG(INIT, "Erase fail at block: 0x%x, update BMT fail\n", mapped_block);
++ return NAND_STATUS_FAIL;
++ }
++#else
++ mtk_nand_block_markbad_hw(mtd, (page_in_block + mapped_block * page_per_block) << chip->page_shift);
++ nand_bbt_set(mtd, page_in_block + mapped_block * page_per_block, 0x3);
++ if (shift_on_bbt) {
++ mapped_block = block_remap(mtd, block);
++ if (mapped_block == -1)
++ return NAND_STATUS_FAIL;
++ if (nand_bbt_get(mtd, mapped_block << (chip->phys_erase_shift - chip->page_shift)) != 0x0)
++ return NAND_STATUS_FAIL;
++ } else
++ return NAND_STATUS_FAIL;
++#endif
++ } else
++ break;
++ } while(1);
++
++ return 0;
++}
++
++static int
++mtk_nand_read_oob_raw(struct mtd_info *mtd, uint8_t * buf, int page_addr, int len)
++{
++ struct nand_chip *chip = (struct nand_chip *)mtd->priv;
++ u32 col_addr = 0;
++ u32 sector = 0;
++ int res = 0;
++ u32 colnob = 2, rawnob = devinfo.addr_cycle - 2;
++ int randomread = 0;
++ int read_len = 0;
++ int sec_num = 1<<(chip->page_shift-9);
++ int spare_per_sector = mtd->oobsize/sec_num;
++
++ if (len > NAND_MAX_OOBSIZE || len % OOB_AVAI_PER_SECTOR || !buf) {
++ printk(KERN_WARNING "[%s] invalid parameter, len: %d, buf: %p\n", __FUNCTION__, len, buf);
++ return -EINVAL;
++ }
++ if (len > spare_per_sector)
++ randomread = 1;
++ if (!randomread || !(devinfo.advancedmode & RAMDOM_READ)) {
++ while (len > 0) {
++ read_len = min(len, spare_per_sector);
++ col_addr = NAND_SECTOR_SIZE + sector * (NAND_SECTOR_SIZE + spare_per_sector); // TODO: Fix this hard-code 16
++ if (!mtk_nand_ready_for_read(chip, page_addr, col_addr, false, NULL)) {
++ printk(KERN_WARNING "mtk_nand_ready_for_read return failed\n");
++ res = -EIO;
++ goto error;
++ }
++ if (!mtk_nand_mcu_read_data(buf + spare_per_sector * sector, read_len)) {
++ printk(KERN_WARNING "mtk_nand_mcu_read_data return failed\n");
++ res = -EIO;
++ goto error;
++ }
++ mtk_nand_check_RW_count(read_len);
++ mtk_nand_stop_read();
++ sector++;
++ len -= read_len;
++ }
++ } else {
++ col_addr = NAND_SECTOR_SIZE;
++ if (chip->options & NAND_BUSWIDTH_16)
++ col_addr /= 2;
++ if (!mtk_nand_reset())
++ goto error;
++ mtk_nand_set_mode(0x6000);
++ NFI_SET_REG16(NFI_CNFG_REG16, CNFG_READ_EN);
++ DRV_WriteReg16(NFI_CON_REG16, 4 << CON_NFI_SEC_SHIFT);
++
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_AHB);
++ NFI_CLN_REG16(NFI_CNFG_REG16, CNFG_HW_ECC_EN);
++
++ mtk_nand_set_autoformat(false);
++
++ if (!mtk_nand_set_command(NAND_CMD_READ0))
++ goto error;
++ //1 FIXED ME: For Any Kind of AddrCycle
++ if (!mtk_nand_set_address(col_addr, page_addr, colnob, rawnob))
++ goto error;
++ if (!mtk_nand_set_command(NAND_CMD_READSTART))
++ goto error;
++ if (!mtk_nand_status_ready(STA_NAND_BUSY))
++ goto error;
++ read_len = min(len, spare_per_sector);
++ if (!mtk_nand_mcu_read_data(buf + spare_per_sector * sector, read_len)) {
++ printk(KERN_WARNING "mtk_nand_mcu_read_data return failed first 16\n");
++ res = -EIO;
++ goto error;
++ }
++ sector++;
++ len -= read_len;
++ mtk_nand_stop_read();
++ while (len > 0) {
++ read_len = min(len, spare_per_sector);
++ if (!mtk_nand_set_command(0x05))
++ goto error;
++ col_addr = NAND_SECTOR_SIZE + sector * (NAND_SECTOR_SIZE + spare_per_sector);
++ if (chip->options & NAND_BUSWIDTH_16)
++ col_addr /= 2;
++ DRV_WriteReg32(NFI_COLADDR_REG32, col_addr);
++ DRV_WriteReg16(NFI_ADDRNOB_REG16, 2);
++ DRV_WriteReg16(NFI_CON_REG16, 4 << CON_NFI_SEC_SHIFT);
++ if (!mtk_nand_status_ready(STA_ADDR_STATE))
++ goto error;
++ if (!mtk_nand_set_command(0xE0))
++ goto error;
++ if (!mtk_nand_status_ready(STA_NAND_BUSY))
++ goto error;
++ if (!mtk_nand_mcu_read_data(buf + spare_per_sector * sector, read_len)) {
++ printk(KERN_WARNING "mtk_nand_mcu_read_data return failed first 16\n");
++ res = -EIO;
++ goto error;
++ }
++ mtk_nand_stop_read();
++ sector++;
++ len -= read_len;
++ }
++ }
++error:
++ NFI_CLN_REG16(NFI_CON_REG16, CON_NFI_BRD);
++ return res;
++}
++
++static int
++mtk_nand_write_oob_raw(struct mtd_info *mtd, const uint8_t * buf, int page_addr, int len)
++{
++ struct nand_chip *chip = mtd->priv;
++ u32 col_addr = 0;
++ u32 sector = 0;
++ int write_len = 0;
++ int status;
++ int sec_num = 1<<(chip->page_shift-9);
++ int spare_per_sector = mtd->oobsize/sec_num;
++
++ if (len > NAND_MAX_OOBSIZE || len % OOB_AVAI_PER_SECTOR || !buf) {
++ printk(KERN_WARNING "[%s] invalid parameter, len: %d, buf: %p\n", __FUNCTION__, len, buf);
++ return -EINVAL;
++ }
++
++ while (len > 0) {
++ write_len = min(len, spare_per_sector);
++ col_addr = sector * (NAND_SECTOR_SIZE + spare_per_sector) + NAND_SECTOR_SIZE;
++ if (!mtk_nand_ready_for_write(chip, page_addr, col_addr, false, NULL))
++ return -EIO;
++ if (!mtk_nand_mcu_write_data(mtd, buf + sector * spare_per_sector, write_len))
++ return -EIO;
++ (void)mtk_nand_check_RW_count(write_len);
++ NFI_CLN_REG16(NFI_CON_REG16, CON_NFI_BWR);
++ (void)mtk_nand_set_command(NAND_CMD_PAGEPROG);
++ while (DRV_Reg32(NFI_STA_REG32) & STA_NAND_BUSY)
++ ;
++ status = chip->waitfunc(mtd, chip);
++ if (status & NAND_STATUS_FAIL) {
++ printk(KERN_INFO "status: %d\n", status);
++ return -EIO;
++ }
++ len -= write_len;
++ sector++;
++ }
++
++ return 0;
++}
++
++static int
++mtk_nand_write_oob_hw(struct mtd_info *mtd, struct nand_chip *chip, int page)
++{
++ int i, iter;
++ int sec_num = 1<<(chip->page_shift-9);
++ int spare_per_sector = mtd->oobsize/sec_num;
++
++ memcpy(local_oob_buf, chip->oob_poi, mtd->oobsize);
++
++ // copy ecc data
++ for (i = 0; i < layout->eccbytes; i++) {
++ iter = (i / (spare_per_sector-OOB_AVAI_PER_SECTOR)) * spare_per_sector + OOB_AVAI_PER_SECTOR + i % (spare_per_sector-OOB_AVAI_PER_SECTOR);
++ local_oob_buf[iter] = chip->oob_poi[layout->eccpos[i]];
++ }
++
++ // copy FDM data
++ for (i = 0; i < sec_num; i++)
++ memcpy(&local_oob_buf[i * spare_per_sector], &chip->oob_poi[i * OOB_AVAI_PER_SECTOR], OOB_AVAI_PER_SECTOR);
++
++ return mtk_nand_write_oob_raw(mtd, local_oob_buf, page, mtd->oobsize);
++}
++
++static int mtk_nand_write_oob(struct mtd_info *mtd, struct nand_chip *chip, int page)
++{
++ int page_per_block = 1 << (chip->phys_erase_shift - chip->page_shift);
++ int block = page / page_per_block;
++ u16 page_in_block = page % page_per_block;
++ int mapped_block = block;
++
++#if defined(MTK_NAND_BMT)
++ mapped_block = get_mapping_block_index(block);
++ // write bad index into oob
++ if (mapped_block != block)
++ set_bad_index_to_oob(chip->oob_poi, block);
++ else
++ set_bad_index_to_oob(chip->oob_poi, FAKE_INDEX);
++#else
++ if (shift_on_bbt)
++ {
++ mapped_block = block_remap(mtd, block);
++ if (mapped_block == -1)
++ return NAND_STATUS_FAIL;
++ if (nand_bbt_get(mtd, mapped_block << (chip->phys_erase_shift - chip->page_shift)) != 0x0)
++ return NAND_STATUS_FAIL;
++ }
++#endif
++ do {
++ if (mtk_nand_write_oob_hw(mtd, chip, page_in_block + mapped_block * page_per_block /* page */)) {
++ MSG(INIT, "write oob fail at block: 0x%x, page: 0x%x\n", mapped_block, page_in_block);
++#if defined(MTK_NAND_BMT)
++ if (update_bmt((page_in_block + mapped_block * page_per_block) << chip->page_shift,
++ UPDATE_WRITE_FAIL, NULL, chip->oob_poi))
++ {
++ MSG(INIT, "Update BMT success\n");
++ return 0;
++ } else {
++ MSG(INIT, "Update BMT fail\n");
++ return -EIO;
++ }
++#else
++ mtk_nand_block_markbad_hw(mtd, (page_in_block + mapped_block * page_per_block) << chip->page_shift);
++ nand_bbt_set(mtd, page_in_block + mapped_block * page_per_block, 0x3);
++ if (shift_on_bbt) {
++ mapped_block = block_remap(mtd, mapped_block);
++ if (mapped_block == -1)
++ return NAND_STATUS_FAIL;
++ if (nand_bbt_get(mtd, mapped_block << (chip->phys_erase_shift - chip->page_shift)) != 0x0)
++ return NAND_STATUS_FAIL;
++ } else {
++ return NAND_STATUS_FAIL;
++ }
++#endif
++ } else
++ break;
++ } while (1);
++
++ return 0;
++}
++
++int
++mtk_nand_block_markbad_hw(struct mtd_info *mtd, loff_t offset)
++{
++ struct nand_chip *chip = mtd->priv;
++ int block = (int)offset >> chip->phys_erase_shift;
++ int page = block * (1 << (chip->phys_erase_shift - chip->page_shift));
++ u8 buf[8];
++
++ memset(buf, 0xFF, 8);
++ buf[0] = 0;
++ return mtk_nand_write_oob_raw(mtd, buf, page, 8);
++}
++
++static int
++mtk_nand_block_markbad(struct mtd_info *mtd, loff_t offset)
++{
++ struct nand_chip *chip = mtd->priv;
++ int block = (int)offset >> chip->phys_erase_shift;
++ int ret;
++ int mapped_block = block;
++
++ nand_get_device(chip, mtd, FL_WRITING);
++
++#if defined(MTK_NAND_BMT)
++ mapped_block = get_mapping_block_index(block);
++ ret = mtk_nand_block_markbad_hw(mtd, mapped_block << chip->phys_erase_shift);
++#else
++ if (shift_on_bbt) {
++ mapped_block = block_remap(mtd, block);
++ if (mapped_block == -1) {
++ printk("NAND mark bad failed\n");
++ nand_release_device(mtd);
++ return NAND_STATUS_FAIL;
++ }
++ }
++ ret = mtk_nand_block_markbad_hw(mtd, mapped_block << chip->phys_erase_shift);
++#endif
++ nand_release_device(mtd);
++
++ return ret;
++}
++
++int
++mtk_nand_read_oob_hw(struct mtd_info *mtd, struct nand_chip *chip, int page)
++{
++ int i;
++ u8 iter = 0;
++
++ int sec_num = 1<<(chip->page_shift-9);
++ int spare_per_sector = mtd->oobsize/sec_num;
++
++ if (mtk_nand_read_oob_raw(mtd, chip->oob_poi, page, mtd->oobsize)) {
++ printk(KERN_ERR "[%s]mtk_nand_read_oob_raw return failed\n", __FUNCTION__);
++ return -EIO;
++ }
++
++ // adjust to ecc physical layout to memory layout
++ /*********************************************************/
++ /* FDM0 | ECC0 | FDM1 | ECC1 | FDM2 | ECC2 | FDM3 | ECC3 */
++ /* 8B | 8B | 8B | 8B | 8B | 8B | 8B | 8B */
++ /*********************************************************/
++
++ memcpy(local_oob_buf, chip->oob_poi, mtd->oobsize);
++ // copy ecc data
++ for (i = 0; i < layout->eccbytes; i++) {
++ iter = (i / (spare_per_sector-OOB_AVAI_PER_SECTOR)) * spare_per_sector + OOB_AVAI_PER_SECTOR + i % (spare_per_sector-OOB_AVAI_PER_SECTOR);
++ chip->oob_poi[layout->eccpos[i]] = local_oob_buf[iter];
++ }
++
++ // copy FDM data
++ for (i = 0; i < sec_num; i++) {
++ memcpy(&chip->oob_poi[i * OOB_AVAI_PER_SECTOR], &local_oob_buf[i * spare_per_sector], OOB_AVAI_PER_SECTOR);
++ }
++
++ return 0;
++}
++
++static int
++mtk_nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip, int page)
++{
++ int page_per_block = 1 << (chip->phys_erase_shift - chip->page_shift);
++ int block = page / page_per_block;
++ u16 page_in_block = page % page_per_block;
++ int mapped_block = block;
++
++#if defined (MTK_NAND_BMT)
++ mapped_block = get_mapping_block_index(block);
++ mtk_nand_read_oob_hw(mtd, chip, page_in_block + mapped_block * page_per_block);
++#else
++ if (shift_on_bbt) {
++ mapped_block = block_remap(mtd, block);
++ if (mapped_block == -1)
++ return NAND_STATUS_FAIL;
++ // allow to read oob even if the block is bad
++ }
++ if (mtk_nand_read_oob_hw(mtd, chip, page_in_block + mapped_block * page_per_block)!=0)
++ return -1;
++#endif
++ return 0;
++}
++
++int
++mtk_nand_block_bad_hw(struct mtd_info *mtd, loff_t ofs)
++{
++ struct nand_chip *chip = (struct nand_chip *)mtd->priv;
++ int page_addr = (int)(ofs >> chip->page_shift);
++ unsigned int page_per_block = 1 << (chip->phys_erase_shift - chip->page_shift);
++ unsigned char oob_buf[8];
++
++ page_addr &= ~(page_per_block - 1);
++ if (mtk_nand_read_oob_raw(mtd, oob_buf, page_addr, sizeof(oob_buf))) {
++ printk(KERN_WARNING "mtk_nand_read_oob_raw return error\n");
++ return 1;
++ }
++
++ if (oob_buf[0] != 0xff) {
++ printk(KERN_WARNING "Bad block detected at 0x%x, oob_buf[0] is 0x%x\n", page_addr, oob_buf[0]);
++ // dump_nfi();
++ return 1;
++ }
++
++ return 0;
++}
++
++static int
++mtk_nand_block_bad(struct mtd_info *mtd, loff_t ofs)
++{
++ struct nand_chip *chip = (struct nand_chip *)mtd->priv;
++ int block = (int)ofs >> chip->phys_erase_shift;
++ int mapped_block = block;
++ int ret;
++
++#if defined(MTK_NAND_BMT)
++ mapped_block = get_mapping_block_index(block);
++#else
++ if (shift_on_bbt) {
++ mapped_block = block_remap(mtd, block);
++ }
++#endif
++
++ ret = mtk_nand_block_bad_hw(mtd, mapped_block << chip->phys_erase_shift);
++#if defined (MTK_NAND_BMT)
++ if (ret) {
++ MSG(INIT, "Unmapped bad block: 0x%x\n", mapped_block);
++ if (update_bmt(mapped_block << chip->phys_erase_shift, UPDATE_UNMAPPED_BLOCK, NULL, NULL)) {
++ MSG(INIT, "Update BMT success\n");
++ ret = 0;
++ } else {
++ MSG(INIT, "Update BMT fail\n");
++ ret = 1;
++ }
++ }
++#endif
++
++ return ret;
++}
++
++#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
++char gacBuf[4096 + 288];
++
++static int
++mtk_nand_verify_buf(struct mtd_info *mtd, const uint8_t * buf, int len)
++{
++ struct nand_chip *chip = (struct nand_chip *)mtd->priv;
++ struct NAND_CMD *pkCMD = &g_kCMD;
++ u32 u4PageSize = mtd->writesize;
++ u32 *pSrc, *pDst;
++ int i;
++
++ mtk_nand_exec_read_page(mtd, pkCMD->u4RowAddr, u4PageSize, gacBuf, gacBuf + u4PageSize);
++
++ pSrc = (u32 *) buf;
++ pDst = (u32 *) gacBuf;
++ len = len / sizeof(u32);
++ for (i = 0; i < len; ++i) {
++ if (*pSrc != *pDst) {
++ MSG(VERIFY, "mtk_nand_verify_buf page fail at page %d\n", pkCMD->u4RowAddr);
++ return -1;
++ }
++ pSrc++;
++ pDst++;
++ }
++
++ pSrc = (u32 *) chip->oob_poi;
++ pDst = (u32 *) (gacBuf + u4PageSize);
++
++ if ((pSrc[0] != pDst[0]) || (pSrc[1] != pDst[1]) || (pSrc[2] != pDst[2]) || (pSrc[3] != pDst[3]) || (pSrc[4] != pDst[4]) || (pSrc[5] != pDst[5])) {
++ // TODO: Ask Designer Why?
++ //(pSrc[6] != pDst[6]) || (pSrc[7] != pDst[7]))
++ MSG(VERIFY, "mtk_nand_verify_buf oob fail at page %d\n", pkCMD->u4RowAddr);
++ MSG(VERIFY, "0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n", pSrc[0], pSrc[1], pSrc[2], pSrc[3], pSrc[4], pSrc[5], pSrc[6], pSrc[7]);
++ MSG(VERIFY, "0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n", pDst[0], pDst[1], pDst[2], pDst[3], pDst[4], pDst[5], pDst[6], pDst[7]);
++ return -1;
++ }
++ return 0;
++}
++#endif
++
++static void
++mtk_nand_init_hw(struct mtk_nand_host *host) {
++ struct mtk_nand_host_hw *hw = host->hw;
++ u32 data;
++
++ data = DRV_Reg32(RALINK_SYSCTL_BASE+0x60);
++ data &= ~((0x3<<18)|(0x3<<16));
++ data |= ((0x2<<18) |(0x2<<16));
++ DRV_WriteReg32(RALINK_SYSCTL_BASE+0x60, data);
++
++ MSG(INIT, "Enable NFI Clock\n");
++ nand_enable_clock();
++
++ g_bInitDone = false;
++ g_kCMD.u4OOBRowAddr = (u32) - 1;
++
++ /* Set default NFI access timing control */
++ DRV_WriteReg32(NFI_ACCCON_REG32, hw->nfi_access_timing);
++ DRV_WriteReg16(NFI_CNFG_REG16, 0);
++ DRV_WriteReg16(NFI_PAGEFMT_REG16, 0);
++
++ /* Reset the state machine and data FIFO, because flushing FIFO */
++ (void)mtk_nand_reset();
++
++ /* Set the ECC engine */
++ if (hw->nand_ecc_mode == NAND_ECC_HW) {
++ MSG(INIT, "%s : Use HW ECC\n", MODULE_NAME);
++ if (g_bHwEcc)
++ NFI_SET_REG32(NFI_CNFG_REG16, CNFG_HW_ECC_EN);
++ ECC_Config(host->hw,4);
++ mtk_nand_configure_fdm(8);
++ mtk_nand_configure_lock();
++ }
++
++ NFI_SET_REG16(NFI_IOCON_REG16, 0x47);
++}
++
++static int mtk_nand_dev_ready(struct mtd_info *mtd)
++{
++ return !(DRV_Reg32(NFI_STA_REG32) & STA_NAND_BUSY);
++}
++
++#define FACT_BBT_BLOCK_NUM 32 // use the latest 32 BLOCK for factory bbt table
++#define FACT_BBT_OOB_SIGNATURE 1
++#define FACT_BBT_SIGNATURE_LEN 7
++const u8 oob_signature[] = "mtknand";
++static u8 *fact_bbt = 0;
++static u32 bbt_size = 0;
++
++static int
++read_fact_bbt(struct mtd_info *mtd, unsigned int page)
++{
++ struct nand_chip *chip = mtd->priv;
++
++ // read oob
++ if (mtk_nand_read_oob_hw(mtd, chip, page)==0)
++ {
++ if (chip->oob_poi[nand_badblock_offset] != 0xFF)
++ {
++ printk("Bad Block on Page %x\n", page);
++ return -1;
++ }
++ if (memcmp(&chip->oob_poi[FACT_BBT_OOB_SIGNATURE], oob_signature, FACT_BBT_SIGNATURE_LEN) != 0)
++ {
++ printk("compare signature failed %x\n", page);
++ return -1;
++ }
++ if (mtk_nand_exec_read_page(mtd, page, mtd->writesize, chip->buffers->databuf, chip->oob_poi))
++ {
++ printk("Signature matched and data read!\n");
++ memcpy(fact_bbt, chip->buffers->databuf, (bbt_size <= mtd->writesize)? bbt_size:mtd->writesize);
++ return 0;
++ }
++
++ }
++ printk("failed at page %x\n", page);
++ return -1;
++}
++
++static int
++load_fact_bbt(struct mtd_info *mtd)
++{
++ struct nand_chip *chip = mtd->priv;
++ int i;
++ u32 total_block;
++
++ total_block = 1 << (chip->chip_shift - chip->phys_erase_shift);
++ bbt_size = total_block >> 2;
++
++ if ((!fact_bbt) && (bbt_size))
++ fact_bbt = (u8 *)kmalloc(bbt_size, GFP_KERNEL);
++ if (!fact_bbt)
++ return -1;
++
++ for (i = total_block - 1; i >= (total_block - FACT_BBT_BLOCK_NUM); i--)
++ {
++ if (read_fact_bbt(mtd, i << (chip->phys_erase_shift - chip->page_shift)) == 0)
++ {
++ printk("load_fact_bbt success %d\n", i);
++ return 0;
++ }
++
++ }
++ printk("load_fact_bbt failed\n");
++ return -1;
++}
++
++static int oob_mtk_ooblayout_ecc(struct mtd_info *mtd, int section,
++ struct mtd_oob_region *oobregion)
++{
++ oobregion->length = 8;
++ oobregion->offset = layout->eccpos[section * 8];
++
++ return 0;
++}
++
++static int oob_mtk_ooblayout_free(struct mtd_info *mtd, int section,
++ struct mtd_oob_region *oobregion)
++{
++ if (section >= (layout->eccbytes / 8)) {
++ return -ERANGE;
++ }
++ oobregion->offset = layout->oobfree[section].offset;
++ oobregion->length = layout->oobfree[section].length;
++
++ return 0;
++}
++
++
++static const struct mtd_ooblayout_ops oob_mtk_ops = {
++ .ecc = oob_mtk_ooblayout_ecc,
++ .free = oob_mtk_ooblayout_free,
++};
++
++static int
++mtk_nand_probe(struct platform_device *pdev)
++{
++ struct mtd_part_parser_data ppdata;
++ struct mtk_nand_host_hw *hw;
++ struct nand_chip *nand_chip;
++ struct mtd_info *mtd;
++ u8 ext_id1, ext_id2, ext_id3;
++ int err = 0;
++ int id;
++ u32 ext_id;
++ int i;
++ u32 data;
++
++ data = DRV_Reg32(RALINK_SYSCTL_BASE+0x60);
++ data &= ~((0x3<<18)|(0x3<<16));
++ data |= ((0x2<<18) |(0x2<<16));
++ DRV_WriteReg32(RALINK_SYSCTL_BASE+0x60, data);
++
++ hw = &mt7621_nand_hw;
++ BUG_ON(!hw);
++ /* Allocate memory for the device structure (and zero it) */
++ host = kzalloc(sizeof(struct mtk_nand_host), GFP_KERNEL);
++ if (!host) {
++ MSG(INIT, "mtk_nand: failed to allocate device structure.\n");
++ return -ENOMEM;
++ }
++
++ host->hw = hw;
++
++ /* init mtd data structure */
++ nand_chip = &host->nand_chip;
++ nand_chip->priv = host; /* link the private data structures */
++
++ mtd = host->mtd = &nand_chip->mtd;
++ mtd->priv = nand_chip;
++ mtd->owner = THIS_MODULE;
++ mtd->name = "MT7621-NAND";
++
++ hw->nand_ecc_mode = NAND_ECC_HW;
++
++ /* Set address of NAND IO lines */
++ nand_chip->IO_ADDR_R = (void __iomem *)NFI_DATAR_REG32;
++ nand_chip->IO_ADDR_W = (void __iomem *)NFI_DATAW_REG32;
++ nand_chip->chip_delay = 20; /* 20us command delay time */
++ nand_chip->ecc.mode = hw->nand_ecc_mode; /* enable ECC */
++ nand_chip->ecc.strength = 1;
++ nand_chip->read_byte = mtk_nand_read_byte;
++ nand_chip->read_buf = mtk_nand_read_buf;
++ nand_chip->write_buf = mtk_nand_write_buf;
++#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
++ nand_chip->verify_buf = mtk_nand_verify_buf;
++#endif
++ nand_chip->select_chip = mtk_nand_select_chip;
++ nand_chip->dev_ready = mtk_nand_dev_ready;
++ nand_chip->cmdfunc = mtk_nand_command_bp;
++ nand_chip->ecc.read_page = mtk_nand_read_page_hwecc;
++ nand_chip->ecc.write_page = mtk_nand_write_page_hwecc;
++
++ mtd_set_ooblayout(mtd, &oob_mtk_ops);
++ nand_chip->ecc.size = hw->nand_ecc_size; //2048
++ nand_chip->ecc.bytes = hw->nand_ecc_bytes; //32
++
++ // For BMT, we need to revise driver architecture
++ nand_chip->write_page = mtk_nand_write_page;
++ nand_chip->ecc.write_oob = mtk_nand_write_oob;
++ nand_chip->block_markbad = mtk_nand_block_markbad; // need to add nand_get_device()/nand_release_device().
++ nand_chip->read_page = mtk_nand_read_page;
++ nand_chip->ecc.read_oob = mtk_nand_read_oob;
++ nand_chip->block_bad = mtk_nand_block_bad;
++ nand_chip->cmd_ctrl = mtk_nfc_cmd_ctrl;
++
++ //Qwert:Add for Uboot
++ mtk_nand_init_hw(host);
++ /* Select the device */
++ nand_chip->select_chip(mtd, NFI_DEFAULT_CS);
++
++ /*
++ * Reset the chip, required by some chips (e.g. Micron MT29FxGxxxxx)
++ * after power-up
++ */
++ nand_chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
++
++ memset(&devinfo, 0 , sizeof(flashdev_info));
++
++ /* Send the command for reading device ID */
++
++ nand_chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
++
++ /* Read manufacturer and device IDs */
++ manu_id = nand_chip->read_byte(mtd);
++ dev_id = nand_chip->read_byte(mtd);
++ id = dev_id | (manu_id << 8);
++ ext_id1 = nand_chip->read_byte(mtd);
++ ext_id2 = nand_chip->read_byte(mtd);
++ ext_id3 = nand_chip->read_byte(mtd);
++ ext_id = ext_id1 << 16 | ext_id2 << 8 | ext_id3;
++ if (!get_device_info(id, ext_id, &devinfo)) {
++ u32 chip_mode = RALINK_REG(RALINK_SYSCTL_BASE+0x010)&0x0F;
++ MSG(INIT, "Not Support this Device! \r\n");
++ memset(&devinfo, 0 , sizeof(flashdev_info));
++ MSG(INIT, "chip_mode=%08X\n",chip_mode);
++
++ /* apply bootstrap first */
++ devinfo.addr_cycle = 5;
++ devinfo.iowidth = 8;
++
++ switch (chip_mode) {
++ case 10:
++ devinfo.pagesize = 2048;
++ devinfo.sparesize = 128;
++ devinfo.totalsize = 128;
++ devinfo.blocksize = 128;
++ break;
++ case 11:
++ devinfo.pagesize = 4096;
++ devinfo.sparesize = 128;
++ devinfo.totalsize = 1024;
++ devinfo.blocksize = 256;
++ break;
++ case 12:
++ devinfo.pagesize = 4096;
++ devinfo.sparesize = 224;
++ devinfo.totalsize = 2048;
++ devinfo.blocksize = 512;
++ break;
++ default:
++ case 1:
++ devinfo.pagesize = 2048;
++ devinfo.sparesize = 64;
++ devinfo.totalsize = 128;
++ devinfo.blocksize = 128;
++ break;
++ }
++
++ devinfo.timmingsetting = NFI_DEFAULT_ACCESS_TIMING;
++ devinfo.devciename[0] = 'U';
++ devinfo.advancedmode = 0;
++ }
++ mtd->writesize = devinfo.pagesize;
++ mtd->erasesize = (devinfo.blocksize<<10);
++ mtd->oobsize = devinfo.sparesize;
++
++ nand_chip->chipsize = (devinfo.totalsize<<20);
++ nand_chip->page_shift = ffs(mtd->writesize) - 1;
++ nand_chip->pagemask = (nand_chip->chipsize >> nand_chip->page_shift) - 1;
++ nand_chip->phys_erase_shift = ffs(mtd->erasesize) - 1;
++ nand_chip->chip_shift = ffs(nand_chip->chipsize) - 1;//0x1C;//ffs(nand_chip->chipsize) - 1;
++ nand_chip->cmd_ctrl = mtk_nfc_cmd_ctrl;
++
++ if (devinfo.pagesize == 4096)
++ layout = &nand_oob_128;
++ else if (devinfo.pagesize == 2048)
++ layout = &nand_oob_64;
++ else if (devinfo.pagesize == 512)
++ layout = &nand_oob_16;
++
++ layout->eccbytes = devinfo.sparesize-OOB_AVAI_PER_SECTOR*(devinfo.pagesize/NAND_SECTOR_SIZE);
++ for (i = 0; i < layout->eccbytes; i++)
++ layout->eccpos[i]=OOB_AVAI_PER_SECTOR*(devinfo.pagesize/NAND_SECTOR_SIZE)+i;
++
++ MSG(INIT, "Support this Device in MTK table! %x \r\n", id);
++ hw->nfi_bus_width = devinfo.iowidth;
++ DRV_WriteReg32(NFI_ACCCON_REG32, devinfo.timmingsetting);
++
++ /* 16-bit bus width */
++ if (hw->nfi_bus_width == 16) {
++ MSG(INIT, "%s : Set the 16-bit I/O settings!\n", MODULE_NAME);
++ nand_chip->options |= NAND_BUSWIDTH_16;
++ }
++ mtd->oobsize = devinfo.sparesize;
++ hw->nfi_cs_num = 1;
++
++ nand_chip->options |= NAND_USE_BOUNCE_BUFFER;
++ nand_chip->buf_align = 16;
++
++ /* Scan to find existance of the device */
++ if (nand_scan(mtd, hw->nfi_cs_num)) {
++ MSG(INIT, "%s : nand_scan fail.\n", MODULE_NAME);
++ err = -ENXIO;
++ goto out;
++ }
++
++ nand_chip->erase = mtk_nand_erase;
++
++ g_page_size = mtd->writesize;
++ platform_set_drvdata(pdev, host);
++ if (hw->nfi_bus_width == 16) {
++ NFI_SET_REG16(NFI_PAGEFMT_REG16, PAGEFMT_DBYTE_EN);
++ }
++
++ nand_chip->select_chip(mtd, 0);
++#if defined(MTK_NAND_BMT)
++ nand_chip->chipsize -= (BMT_POOL_SIZE) << nand_chip->phys_erase_shift;
++#endif
++ mtd->size = nand_chip->chipsize;
++
++ CFG_BLOCKSIZE = mtd->erasesize;
++
++#if defined(MTK_NAND_BMT)
++ if (!g_bmt) {
++ if (!(g_bmt = init_bmt(nand_chip, BMT_POOL_SIZE))) {
++ MSG(INIT, "Error: init bmt failed\n");
++ return 0;
++ }
++ }
++#endif
++
++ nand_set_flash_node(nand_chip, pdev->dev.of_node);
++ err = mtd_device_parse_register(mtd, probe_types, &ppdata,
++ NULL, 0);
++ if (!err) {
++ MSG(INIT, "[mtk_nand] probe successfully!\n");
++ nand_disable_clock();
++ shift_on_bbt = 0;
++ if (load_fact_bbt(mtd) == 0) {
++ int i;
++ for (i = 0; i < 0x100; i++)
++ nand_chip->bbt[i] |= fact_bbt[i];
++ }
++
++ return err;
++ }
++
++out:
++ MSG(INIT, "[NFI] mtk_nand_probe fail, err = %d!\n", err);
++ nand_release(mtd);
++ platform_set_drvdata(pdev, NULL);
++ kfree(host);
++ nand_disable_clock();
++ return err;
++}
++
++static int
++mtk_nand_remove(struct platform_device *pdev)
++{
++ struct mtk_nand_host *host = platform_get_drvdata(pdev);
++ struct mtd_info *mtd = host->mtd;
++ struct nand_chip *nand_chip = &host->nand_chip;
++
++ nand_release(mtd);
++ kfree(host);
++ nand_disable_clock();
++
++ return 0;
++}
++
++static const struct of_device_id mt7621_nand_match[] = {
++ { .compatible = "mtk,mt7621-nand" },
++ {},
++};
++MODULE_DEVICE_TABLE(of, mt7621_nand_match);
++
++static struct platform_driver mtk_nand_driver = {
++ .probe = mtk_nand_probe,
++ .remove = mtk_nand_remove,
++ .driver = {
++ .name = "MT7621-NAND",
++ .owner = THIS_MODULE,
++ .of_match_table = mt7621_nand_match,
++ },
++};
++
++static int __init
++mtk_nand_init(void)
++{
++ printk("MediaTek Nand driver init, version %s\n", VERSION);
++
++ return platform_driver_register(&mtk_nand_driver);
++}
++
++static void __exit
++mtk_nand_exit(void)
++{
++ platform_driver_unregister(&mtk_nand_driver);
++}
++
++module_init(mtk_nand_init);
++module_exit(mtk_nand_exit);
++MODULE_LICENSE("GPL");
+--- /dev/null
++++ b/drivers/mtd/nand/mtk_nand2.h
+@@ -0,0 +1,452 @@
++#ifndef __MTK_NAND_H
++#define __MTK_NAND_H
++
++#define RALINK_NAND_CTRL_BASE 0xBE003000
++#define RALINK_SYSCTL_BASE 0xBE000000
++#define RALINK_NANDECC_CTRL_BASE 0xBE003800
++/*******************************************************************************
++ * NFI Register Definition
++ *******************************************************************************/
++
++#define NFI_CNFG_REG16 ((volatile P_U16)(NFI_BASE+0x0000))
++#define NFI_PAGEFMT_REG16 ((volatile P_U16)(NFI_BASE+0x0004))
++#define NFI_CON_REG16 ((volatile P_U16)(NFI_BASE+0x0008))
++#define NFI_ACCCON_REG32 ((volatile P_U32)(NFI_BASE+0x000C))
++#define NFI_INTR_EN_REG16 ((volatile P_U16)(NFI_BASE+0x0010))
++#define NFI_INTR_REG16 ((volatile P_U16)(NFI_BASE+0x0014))
++
++#define NFI_CMD_REG16 ((volatile P_U16)(NFI_BASE+0x0020))
++
++#define NFI_ADDRNOB_REG16 ((volatile P_U16)(NFI_BASE+0x0030))
++#define NFI_COLADDR_REG32 ((volatile P_U32)(NFI_BASE+0x0034))
++#define NFI_ROWADDR_REG32 ((volatile P_U32)(NFI_BASE+0x0038))
++
++#define NFI_STRDATA_REG16 ((volatile P_U16)(NFI_BASE+0x0040))
++
++#define NFI_DATAW_REG32 ((volatile P_U32)(NFI_BASE+0x0050))
++#define NFI_DATAR_REG32 ((volatile P_U32)(NFI_BASE+0x0054))
++#define NFI_PIO_DIRDY_REG16 ((volatile P_U16)(NFI_BASE+0x0058))
++
++#define NFI_STA_REG32 ((volatile P_U32)(NFI_BASE+0x0060))
++#define NFI_FIFOSTA_REG16 ((volatile P_U16)(NFI_BASE+0x0064))
++#define NFI_LOCKSTA_REG16 ((volatile P_U16)(NFI_BASE+0x0068))
++
++#define NFI_ADDRCNTR_REG16 ((volatile P_U16)(NFI_BASE+0x0070))
++
++#define NFI_STRADDR_REG32 ((volatile P_U32)(NFI_BASE+0x0080))
++#define NFI_BYTELEN_REG16 ((volatile P_U16)(NFI_BASE+0x0084))
++
++#define NFI_CSEL_REG16 ((volatile P_U16)(NFI_BASE+0x0090))
++#define NFI_IOCON_REG16 ((volatile P_U16)(NFI_BASE+0x0094))
++
++#define NFI_FDM0L_REG32 ((volatile P_U32)(NFI_BASE+0x00A0))
++#define NFI_FDM0M_REG32 ((volatile P_U32)(NFI_BASE+0x00A4))
++
++#define NFI_LOCK_REG16 ((volatile P_U16)(NFI_BASE+0x0100))
++#define NFI_LOCKCON_REG32 ((volatile P_U32)(NFI_BASE+0x0104))
++#define NFI_LOCKANOB_REG16 ((volatile P_U16)(NFI_BASE+0x0108))
++#define NFI_LOCK00ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0110))
++#define NFI_LOCK00FMT_REG32 ((volatile P_U32)(NFI_BASE+0x0114))
++#define NFI_LOCK01ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0118))
++#define NFI_LOCK01FMT_REG32 ((volatile P_U32)(NFI_BASE+0x011C))
++#define NFI_LOCK02ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0120))
++#define NFI_LOCK02FMT_REG32 ((volatile P_U32)(NFI_BASE+0x0124))
++#define NFI_LOCK03ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0128))
++#define NFI_LOCK03FMT_REG32 ((volatile P_U32)(NFI_BASE+0x012C))
++#define NFI_LOCK04ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0130))
++#define NFI_LOCK04FMT_REG32 ((volatile P_U32)(NFI_BASE+0x0134))
++#define NFI_LOCK05ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0138))
++#define NFI_LOCK05FMT_REG32 ((volatile P_U32)(NFI_BASE+0x013C))
++#define NFI_LOCK06ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0140))
++#define NFI_LOCK06FMT_REG32 ((volatile P_U32)(NFI_BASE+0x0144))
++#define NFI_LOCK07ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0148))
++#define NFI_LOCK07FMT_REG32 ((volatile P_U32)(NFI_BASE+0x014C))
++#define NFI_LOCK08ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0150))
++#define NFI_LOCK08FMT_REG32 ((volatile P_U32)(NFI_BASE+0x0154))
++#define NFI_LOCK09ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0158))
++#define NFI_LOCK09FMT_REG32 ((volatile P_U32)(NFI_BASE+0x015C))
++#define NFI_LOCK10ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0160))
++#define NFI_LOCK10FMT_REG32 ((volatile P_U32)(NFI_BASE+0x0164))
++#define NFI_LOCK11ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0168))
++#define NFI_LOCK11FMT_REG32 ((volatile P_U32)(NFI_BASE+0x016C))
++#define NFI_LOCK12ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0170))
++#define NFI_LOCK12FMT_REG32 ((volatile P_U32)(NFI_BASE+0x0174))
++#define NFI_LOCK13ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0178))
++#define NFI_LOCK13FMT_REG32 ((volatile P_U32)(NFI_BASE+0x017C))
++#define NFI_LOCK14ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0180))
++#define NFI_LOCK14FMT_REG32 ((volatile P_U32)(NFI_BASE+0x0184))
++#define NFI_LOCK15ADD_REG32 ((volatile P_U32)(NFI_BASE+0x0188))
++#define NFI_LOCK15FMT_REG32 ((volatile P_U32)(NFI_BASE+0x018C))
++
++#define NFI_FIFODATA0_REG32 ((volatile P_U32)(NFI_BASE+0x0190))
++#define NFI_FIFODATA1_REG32 ((volatile P_U32)(NFI_BASE+0x0194))
++#define NFI_FIFODATA2_REG32 ((volatile P_U32)(NFI_BASE+0x0198))
++#define NFI_FIFODATA3_REG32 ((volatile P_U32)(NFI_BASE+0x019C))
++#define NFI_MASTERSTA_REG16 ((volatile P_U16)(NFI_BASE+0x0210))
++
++
++/*******************************************************************************
++ * NFI Register Field Definition
++ *******************************************************************************/
++
++/* NFI_CNFG */
++#define CNFG_AHB (0x0001)
++#define CNFG_READ_EN (0x0002)
++#define CNFG_DMA_BURST_EN (0x0004)
++#define CNFG_BYTE_RW (0x0040)
++#define CNFG_HW_ECC_EN (0x0100)
++#define CNFG_AUTO_FMT_EN (0x0200)
++#define CNFG_OP_IDLE (0x0000)
++#define CNFG_OP_READ (0x1000)
++#define CNFG_OP_SRD (0x2000)
++#define CNFG_OP_PRGM (0x3000)
++#define CNFG_OP_ERASE (0x4000)
++#define CNFG_OP_RESET (0x5000)
++#define CNFG_OP_CUST (0x6000)
++#define CNFG_OP_MODE_MASK (0x7000)
++#define CNFG_OP_MODE_SHIFT (12)
++
++/* NFI_PAGEFMT */
++#define PAGEFMT_512 (0x0000)
++#define PAGEFMT_2K (0x0001)
++#define PAGEFMT_4K (0x0002)
++
++#define PAGEFMT_PAGE_MASK (0x0003)
++
++#define PAGEFMT_DBYTE_EN (0x0008)
++
++#define PAGEFMT_SPARE_16 (0x0000)
++#define PAGEFMT_SPARE_26 (0x0001)
++#define PAGEFMT_SPARE_27 (0x0002)
++#define PAGEFMT_SPARE_28 (0x0003)
++#define PAGEFMT_SPARE_MASK (0x0030)
++#define PAGEFMT_SPARE_SHIFT (4)
++
++#define PAGEFMT_FDM_MASK (0x0F00)
++#define PAGEFMT_FDM_SHIFT (8)
++
++#define PAGEFMT_FDM_ECC_MASK (0xF000)
++#define PAGEFMT_FDM_ECC_SHIFT (12)
++
++/* NFI_CON */
++#define CON_FIFO_FLUSH (0x0001)
++#define CON_NFI_RST (0x0002)
++#define CON_NFI_SRD (0x0010)
++
++#define CON_NFI_NOB_MASK (0x0060)
++#define CON_NFI_NOB_SHIFT (5)
++
++#define CON_NFI_BRD (0x0100)
++#define CON_NFI_BWR (0x0200)
++
++#define CON_NFI_SEC_MASK (0xF000)
++#define CON_NFI_SEC_SHIFT (12)
++
++/* NFI_ACCCON */
++#define ACCCON_SETTING ()
++
++/* NFI_INTR_EN */
++#define INTR_RD_DONE_EN (0x0001)
++#define INTR_WR_DONE_EN (0x0002)
++#define INTR_RST_DONE_EN (0x0004)
++#define INTR_ERASE_DONE_EN (0x0008)
++#define INTR_BSY_RTN_EN (0x0010)
++#define INTR_ACC_LOCK_EN (0x0020)
++#define INTR_AHB_DONE_EN (0x0040)
++#define INTR_ALL_INTR_DE (0x0000)
++#define INTR_ALL_INTR_EN (0x007F)
++
++/* NFI_INTR */
++#define INTR_RD_DONE (0x0001)
++#define INTR_WR_DONE (0x0002)
++#define INTR_RST_DONE (0x0004)
++#define INTR_ERASE_DONE (0x0008)
++#define INTR_BSY_RTN (0x0010)
++#define INTR_ACC_LOCK (0x0020)
++#define INTR_AHB_DONE (0x0040)
++
++/* NFI_ADDRNOB */
++#define ADDR_COL_NOB_MASK (0x0003)
++#define ADDR_COL_NOB_SHIFT (0)
++#define ADDR_ROW_NOB_MASK (0x0030)
++#define ADDR_ROW_NOB_SHIFT (4)
++
++/* NFI_STA */
++#define STA_READ_EMPTY (0x00001000)
++#define STA_ACC_LOCK (0x00000010)
++#define STA_CMD_STATE (0x00000001)
++#define STA_ADDR_STATE (0x00000002)
++#define STA_DATAR_STATE (0x00000004)
++#define STA_DATAW_STATE (0x00000008)
++
++#define STA_NAND_FSM_MASK (0x1F000000)
++#define STA_NAND_BUSY (0x00000100)
++#define STA_NAND_BUSY_RETURN (0x00000200)
++#define STA_NFI_FSM_MASK (0x000F0000)
++#define STA_NFI_OP_MASK (0x0000000F)
++
++/* NFI_FIFOSTA */
++#define FIFO_RD_EMPTY (0x0040)
++#define FIFO_RD_FULL (0x0080)
++#define FIFO_WR_FULL (0x8000)
++#define FIFO_WR_EMPTY (0x4000)
++#define FIFO_RD_REMAIN(x) (0x1F&(x))
++#define FIFO_WR_REMAIN(x) ((0x1F00&(x))>>8)
++
++/* NFI_ADDRCNTR */
++#define ADDRCNTR_CNTR(x) ((0xF000&(x))>>12)
++#define ADDRCNTR_OFFSET(x) (0x03FF&(x))
++
++/* NFI_LOCK */
++#define NFI_LOCK_ON (0x0001)
++
++/* NFI_LOCKANOB */
++#define PROG_RADD_NOB_MASK (0x7000)
++#define PROG_RADD_NOB_SHIFT (12)
++#define PROG_CADD_NOB_MASK (0x0300)
++#define PROG_CADD_NOB_SHIFT (8)
++#define ERASE_RADD_NOB_MASK (0x0070)
++#define ERASE_RADD_NOB_SHIFT (4)
++#define ERASE_CADD_NOB_MASK (0x0007)
++#define ERASE_CADD_NOB_SHIFT (0)
++
++/*******************************************************************************
++ * ECC Register Definition
++ *******************************************************************************/
++
++#define ECC_ENCCON_REG16 ((volatile P_U16)(NFIECC_BASE+0x0000))
++#define ECC_ENCCNFG_REG32 ((volatile P_U32)(NFIECC_BASE+0x0004))
++#define ECC_ENCDIADDR_REG32 ((volatile P_U32)(NFIECC_BASE+0x0008))
++#define ECC_ENCIDLE_REG32 ((volatile P_U32)(NFIECC_BASE+0x000C))
++#define ECC_ENCPAR0_REG32 ((volatile P_U32)(NFIECC_BASE+0x0010))
++#define ECC_ENCPAR1_REG32 ((volatile P_U32)(NFIECC_BASE+0x0014))
++#define ECC_ENCPAR2_REG32 ((volatile P_U32)(NFIECC_BASE+0x0018))
++#define ECC_ENCPAR3_REG32 ((volatile P_U32)(NFIECC_BASE+0x001C))
++#define ECC_ENCPAR4_REG32 ((volatile P_U32)(NFIECC_BASE+0x0020))
++#define ECC_ENCSTA_REG32 ((volatile P_U32)(NFIECC_BASE+0x0024))
++#define ECC_ENCIRQEN_REG16 ((volatile P_U16)(NFIECC_BASE+0x0028))
++#define ECC_ENCIRQSTA_REG16 ((volatile P_U16)(NFIECC_BASE+0x002C))
++
++#define ECC_DECCON_REG16 ((volatile P_U16)(NFIECC_BASE+0x0100))
++#define ECC_DECCNFG_REG32 ((volatile P_U32)(NFIECC_BASE+0x0104))
++#define ECC_DECDIADDR_REG32 ((volatile P_U32)(NFIECC_BASE+0x0108))
++#define ECC_DECIDLE_REG16 ((volatile P_U16)(NFIECC_BASE+0x010C))
++#define ECC_DECFER_REG16 ((volatile P_U16)(NFIECC_BASE+0x0110))
++#define ECC_DECENUM_REG32 ((volatile P_U32)(NFIECC_BASE+0x0114))
++#define ECC_DECDONE_REG16 ((volatile P_U16)(NFIECC_BASE+0x0118))
++#define ECC_DECEL0_REG32 ((volatile P_U32)(NFIECC_BASE+0x011C))
++#define ECC_DECEL1_REG32 ((volatile P_U32)(NFIECC_BASE+0x0120))
++#define ECC_DECEL2_REG32 ((volatile P_U32)(NFIECC_BASE+0x0124))
++#define ECC_DECEL3_REG32 ((volatile P_U32)(NFIECC_BASE+0x0128))
++#define ECC_DECEL4_REG32 ((volatile P_U32)(NFIECC_BASE+0x012C))
++#define ECC_DECEL5_REG32 ((volatile P_U32)(NFIECC_BASE+0x0130))
++#define ECC_DECIRQEN_REG16 ((volatile P_U16)(NFIECC_BASE+0x0134))
++#define ECC_DECIRQSTA_REG16 ((volatile P_U16)(NFIECC_BASE+0x0138))
++#define ECC_FDMADDR_REG32 ((volatile P_U32)(NFIECC_BASE+0x013C))
++#define ECC_DECFSM_REG32 ((volatile P_U32)(NFIECC_BASE+0x0140))
++#define ECC_SYNSTA_REG32 ((volatile P_U32)(NFIECC_BASE+0x0144))
++#define ECC_DECNFIDI_REG32 ((volatile P_U32)(NFIECC_BASE+0x0148))
++#define ECC_SYN0_REG32 ((volatile P_U32)(NFIECC_BASE+0x014C))
++
++/*******************************************************************************
++ * ECC register definition
++ *******************************************************************************/
++/* ECC_ENCON */
++#define ENC_EN (0x0001)
++#define ENC_DE (0x0000)
++
++/* ECC_ENCCNFG */
++#define ECC_CNFG_ECC4 (0x0000)
++#define ECC_CNFG_ECC6 (0x0001)
++#define ECC_CNFG_ECC8 (0x0002)
++#define ECC_CNFG_ECC10 (0x0003)
++#define ECC_CNFG_ECC12 (0x0004)
++#define ECC_CNFG_ECC_MASK (0x00000007)
++
++#define ENC_CNFG_NFI (0x0010)
++#define ENC_CNFG_MODE_MASK (0x0010)
++
++#define ENC_CNFG_META6 (0x10300000)
++#define ENC_CNFG_META8 (0x10400000)
++
++#define ENC_CNFG_MSG_MASK (0x1FFF0000)
++#define ENC_CNFG_MSG_SHIFT (0x10)
++
++/* ECC_ENCIDLE */
++#define ENC_IDLE (0x0001)
++
++/* ECC_ENCSTA */
++#define STA_FSM (0x001F)
++#define STA_COUNT_PS (0xFF10)
++#define STA_COUNT_MS (0x3FFF0000)
++
++/* ECC_ENCIRQEN */
++#define ENC_IRQEN (0x0001)
++
++/* ECC_ENCIRQSTA */
++#define ENC_IRQSTA (0x0001)
++
++/* ECC_DECCON */
++#define DEC_EN (0x0001)
++#define DEC_DE (0x0000)
++
++/* ECC_ENCCNFG */
++#define DEC_CNFG_ECC4 (0x0000)
++//#define DEC_CNFG_ECC6 (0x0001)
++//#define DEC_CNFG_ECC12 (0x0002)
++#define DEC_CNFG_NFI (0x0010)
++//#define DEC_CNFG_META6 (0x10300000)
++//#define DEC_CNFG_META8 (0x10400000)
++
++#define DEC_CNFG_FER (0x01000)
++#define DEC_CNFG_EL (0x02000)
++#define DEC_CNFG_CORRECT (0x03000)
++#define DEC_CNFG_TYPE_MASK (0x03000)
++
++#define DEC_CNFG_EMPTY_EN (0x80000000)
++
++#define DEC_CNFG_CODE_MASK (0x1FFF0000)
++#define DEC_CNFG_CODE_SHIFT (0x10)
++
++/* ECC_DECIDLE */
++#define DEC_IDLE (0x0001)
++
++/* ECC_DECFER */
++#define DEC_FER0 (0x0001)
++#define DEC_FER1 (0x0002)
++#define DEC_FER2 (0x0004)
++#define DEC_FER3 (0x0008)
++#define DEC_FER4 (0x0010)
++#define DEC_FER5 (0x0020)
++#define DEC_FER6 (0x0040)
++#define DEC_FER7 (0x0080)
++
++/* ECC_DECENUM */
++#define ERR_NUM0 (0x0000000F)
++#define ERR_NUM1 (0x000000F0)
++#define ERR_NUM2 (0x00000F00)
++#define ERR_NUM3 (0x0000F000)
++#define ERR_NUM4 (0x000F0000)
++#define ERR_NUM5 (0x00F00000)
++#define ERR_NUM6 (0x0F000000)
++#define ERR_NUM7 (0xF0000000)
++
++/* ECC_DECDONE */
++#define DEC_DONE0 (0x0001)
++#define DEC_DONE1 (0x0002)
++#define DEC_DONE2 (0x0004)
++#define DEC_DONE3 (0x0008)
++#define DEC_DONE4 (0x0010)
++#define DEC_DONE5 (0x0020)
++#define DEC_DONE6 (0x0040)
++#define DEC_DONE7 (0x0080)
++
++/* ECC_DECIRQEN */
++#define DEC_IRQEN (0x0001)
++
++/* ECC_DECIRQSTA */
++#define DEC_IRQSTA (0x0001)
++
++#define CHIPVER_ECO_1 (0x8a00)
++#define CHIPVER_ECO_2 (0x8a01)
++
++//#define NAND_PFM
++
++/*******************************************************************************
++ * Data Structure Definition
++ *******************************************************************************/
++struct mtk_nand_host
++{
++ struct nand_chip nand_chip;
++ struct mtd_info *mtd;
++ struct mtk_nand_host_hw *hw;
++};
++
++struct NAND_CMD
++{
++ u32 u4ColAddr;
++ u32 u4RowAddr;
++ u32 u4OOBRowAddr;
++ u8 au1OOB[288];
++ u8* pDataBuf;
++#ifdef NAND_PFM
++ u32 pureReadOOB;
++ u32 pureReadOOBNum;
++#endif
++};
++
++/*
++ * ECC layout control structure. Exported to userspace for
++ * diagnosis and to allow creation of raw images
++struct nand_ecclayout {
++ uint32_t eccbytes;
++ uint32_t eccpos[64];
++ uint32_t oobavail;
++ struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES];
++};
++*/
++#define __DEBUG_NAND 1 /* Debug information on/off */
++
++/* Debug message event */
++#define DBG_EVT_NONE 0x00000000 /* No event */
++#define DBG_EVT_INIT 0x00000001 /* Initial related event */
++#define DBG_EVT_VERIFY 0x00000002 /* Verify buffer related event */
++#define DBG_EVT_PERFORMANCE 0x00000004 /* Performance related event */
++#define DBG_EVT_READ 0x00000008 /* Read related event */
++#define DBG_EVT_WRITE 0x00000010 /* Write related event */
++#define DBG_EVT_ERASE 0x00000020 /* Erase related event */
++#define DBG_EVT_BADBLOCK 0x00000040 /* Badblock related event */
++#define DBG_EVT_POWERCTL 0x00000080 /* Suspend/Resume related event */
++
++#define DBG_EVT_ALL 0xffffffff
++
++#define DBG_EVT_MASK (DBG_EVT_INIT)
++
++#if __DEBUG_NAND
++#define MSG(evt, fmt, args...) \
++do { \
++ if ((DBG_EVT_##evt) & DBG_EVT_MASK) { \
++ printk(fmt, ##args); \
++ } \
++} while(0)
++
++#define MSG_FUNC_ENTRY(f) MSG(FUC, "<FUN_ENT>: %s\n", __FUNCTION__)
++#else
++#define MSG(evt, fmt, args...) do{}while(0)
++#define MSG_FUNC_ENTRY(f) do{}while(0)
++#endif
++
++#define RAMDOM_READ 1<<0
++#define CACHE_READ 1<<1
++
++typedef struct
++{
++ u16 id; //deviceid+menuid
++ u32 ext_id;
++ u8 addr_cycle;
++ u8 iowidth;
++ u16 totalsize;
++ u16 blocksize;
++ u16 pagesize;
++ u16 sparesize;
++ u32 timmingsetting;
++ char devciename[14];
++ u32 advancedmode; //
++}flashdev_info,*pflashdev_info;
++
++/* NAND driver */
++#if 0
++struct mtk_nand_host_hw {
++ unsigned int nfi_bus_width; /* NFI_BUS_WIDTH */
++ unsigned int nfi_access_timing; /* NFI_ACCESS_TIMING */
++ unsigned int nfi_cs_num; /* NFI_CS_NUM */
++ unsigned int nand_sec_size; /* NAND_SECTOR_SIZE */
++ unsigned int nand_sec_shift; /* NAND_SECTOR_SHIFT */
++ unsigned int nand_ecc_size;
++ unsigned int nand_ecc_bytes;
++ unsigned int nand_ecc_mode;
++};
++extern struct mtk_nand_host_hw mt7621_nand_hw;
++extern u32 CFG_BLOCKSIZE;
++#endif
++#endif
+--- a/drivers/mtd/nand/nand_base.c
++++ b/drivers/mtd/nand/nand_base.c
+@@ -48,7 +48,7 @@
+ #include <linux/mtd/partitions.h>
+ #include <linux/of.h>
+
+-static int nand_get_device(struct mtd_info *mtd, int new_state);
++int nand_get_device(struct mtd_info *mtd, int new_state);
+
+ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops);
+@@ -240,7 +240,7 @@ static int check_offs_len(struct mtd_inf
+ *
+ * Release chip lock and wake up anyone waiting on the device.
+ */
+-static void nand_release_device(struct mtd_info *mtd)
++void nand_release_device(struct mtd_info *mtd)
+ {
+ struct nand_chip *chip = mtd_to_nand(mtd);
+
+@@ -968,7 +968,7 @@ static void panic_nand_get_device(struct
+ *
+ * Get the device and lock it for exclusive access
+ */
+-static int
++int
+ nand_get_device(struct mtd_info *mtd, int new_state)
+ {
+ struct nand_chip *chip = mtd_to_nand(mtd);
+--- /dev/null
++++ b/drivers/mtd/nand/nand_def.h
+@@ -0,0 +1,123 @@
++#ifndef __NAND_DEF_H__
++#define __NAND_DEF_H__
++
++#define VERSION "v2.1 Fix AHB virt2phys error"
++#define MODULE_NAME "# MTK NAND #"
++#define PROCNAME "driver/nand"
++
++#undef TESTTIME
++//#define __UBOOT_NAND__ 1
++#define __KERNEL_NAND__ 1
++//#define __PRELOADER_NAND__ 1
++//#define PMT 1
++//#define _MTK_NAND_DUMMY_DRIVER
++//#define CONFIG_BADBLOCK_CHECK 1
++//#ifdef CONFIG_BADBLOCK_CHECK
++//#define MTK_NAND_BMT 1
++//#endif
++#define ECC_ENABLE 1
++#define MANUAL_CORRECT 1
++//#define __INTERNAL_USE_AHB_MODE__ (0)
++#define SKIP_BAD_BLOCK
++#define FACT_BBT
++
++#ifndef NAND_OTP_SUPPORT
++#define NAND_OTP_SUPPORT 0
++#endif
++
++/*******************************************************************************
++ * Macro definition
++ *******************************************************************************/
++//#define NFI_SET_REG32(reg, value) (DRV_WriteReg32(reg, DRV_Reg32(reg) | (value)))
++//#define NFI_SET_REG16(reg, value) (DRV_WriteReg16(reg, DRV_Reg16(reg) | (value)))
++//#define NFI_CLN_REG32(reg, value) (DRV_WriteReg32(reg, DRV_Reg32(reg) & (~(value))))
++//#define NFI_CLN_REG16(reg, value) (DRV_WriteReg16(reg, DRV_Reg16(reg) & (~(value))))
++
++#if defined (__KERNEL_NAND__)
++#define NFI_SET_REG32(reg, value) \
++do { \
++ g_value = (DRV_Reg32(reg) | (value));\
++ DRV_WriteReg32(reg, g_value); \
++} while(0)
++
++#define NFI_SET_REG16(reg, value) \
++do { \
++ g_value = (DRV_Reg16(reg) | (value));\
++ DRV_WriteReg16(reg, g_value); \
++} while(0)
++
++#define NFI_CLN_REG32(reg, value) \
++do { \
++ g_value = (DRV_Reg32(reg) & (~(value)));\
++ DRV_WriteReg32(reg, g_value); \
++} while(0)
++
++#define NFI_CLN_REG16(reg, value) \
++do { \
++ g_value = (DRV_Reg16(reg) & (~(value)));\
++ DRV_WriteReg16(reg, g_value); \
++} while(0)
++#endif
++
++#define NFI_WAIT_STATE_DONE(state) do{;}while (__raw_readl(NFI_STA_REG32) & state)
++#define NFI_WAIT_TO_READY() do{;}while (!(__raw_readl(NFI_STA_REG32) & STA_BUSY2READY))
++
++
++#define NAND_SECTOR_SIZE (512)
++#define OOB_PER_SECTOR (16)
++#define OOB_AVAI_PER_SECTOR (8)
++
++#ifndef PART_SIZE_BMTPOOL
++#define BMT_POOL_SIZE (80)
++#else
++#define BMT_POOL_SIZE (PART_SIZE_BMTPOOL)
++#endif
++
++#define PMT_POOL_SIZE (2)
++
++#define TIMEOUT_1 0x1fff
++#define TIMEOUT_2 0x8ff
++#define TIMEOUT_3 0xffff
++#define TIMEOUT_4 0xffff//5000 //PIO
++
++
++/* temporarity definiation */
++#if !defined (__KERNEL_NAND__)
++#define KERN_INFO
++#define KERN_WARNING
++#define KERN_ERR
++#define PAGE_SIZE (4096)
++#endif
++#define AddStorageTrace //AddStorageTrace
++#define STORAGE_LOGGER_MSG_NAND 0
++#define NFI_BASE RALINK_NAND_CTRL_BASE
++#define NFIECC_BASE RALINK_NANDECC_CTRL_BASE
++
++#ifdef __INTERNAL_USE_AHB_MODE__
++#define MT65xx_POLARITY_LOW 0
++#define MT65XX_PDN_PERI_NFI 0
++#define MT65xx_EDGE_SENSITIVE 0
++#define MT6575_NFI_IRQ_ID (58)
++#endif
++
++#if defined (__KERNEL_NAND__)
++#define RALINK_REG(x) (*((volatile u32 *)(x)))
++#define __virt_to_phys(x) virt_to_phys((volatile void*)x)
++#else
++#define CONFIG_MTD_NAND_VERIFY_WRITE (1)
++#define printk printf
++#define ra_dbg printf
++#define BUG() //BUG()
++#define BUG_ON(x) //BUG_ON()
++#define NUM_PARTITIONS 1
++#endif
++
++#define NFI_DEFAULT_ACCESS_TIMING (0x30C77fff) //(0x44333)
++
++//uboot only support 1 cs
++#define NFI_CS_NUM (1)
++#define NFI_DEFAULT_CS (0)
++
++#include "mt6575_typedefs.h"
++
++#endif /* __NAND_DEF_H__ */
+--- /dev/null
++++ b/drivers/mtd/nand/nand_device_list.h
+@@ -0,0 +1,60 @@
++/* Copyright Statement:
++ *
++ * This software/firmware and related documentation ("MediaTek Software") are
++ * protected under relevant copyright laws. The information contained herein
++ * is confidential and proprietary to MediaTek Inc. and/or its licensors.
++ * Without the prior written permission of MediaTek inc. and/or its licensors,
++ * any reproduction, modification, use or disclosure of MediaTek Software,
++ * and information contained herein, in whole or in part, shall be strictly prohibited.
++ */
++/* MediaTek Inc. (C) 2010. All rights reserved.
++ *
++ * BY OPENING THIS FILE, RECEIVER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
++ * THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
++ * RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO RECEIVER ON
++ * AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
++ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
++ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
++ * NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
++ * SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
++ * SUPPLIED WITH THE MEDIATEK SOFTWARE, AND RECEIVER AGREES TO LOOK ONLY TO SUCH
++ * THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. RECEIVER EXPRESSLY ACKNOWLEDGES
++ * THAT IT IS RECEIVER'S SOLE RESPONSIBILITY TO OBTAIN FROM ANY THIRD PARTY ALL PROPER LICENSES
++ * CONTAINED IN MEDIATEK SOFTWARE. MEDIATEK SHALL ALSO NOT BE RESPONSIBLE FOR ANY MEDIATEK
++ * SOFTWARE RELEASES MADE TO RECEIVER'S SPECIFICATION OR TO CONFORM TO A PARTICULAR
++ * STANDARD OR OPEN FORUM. RECEIVER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND
++ * CUMULATIVE LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
++ * AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
++ * OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY RECEIVER TO
++ * MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
++ *
++ * The following software/firmware and/or related documentation ("MediaTek Software")
++ * have been modified by MediaTek Inc. All revisions are subject to any receiver's
++ * applicable license agreements with MediaTek Inc.
++ */
++
++#ifndef __NAND_DEVICE_LIST_H__
++#define __NAND_DEVICE_LIST_H__
++
++static const flashdev_info gen_FlashTable[]={
++ {0x20BC, 0x105554, 5, 16, 512, 128, 2048, 64, 0x1123, "EHD013151MA_5", 0},
++ {0xECBC, 0x005554, 5, 16, 512, 128, 2048, 64, 0x1123, "K524G2GACB_A0", 0},
++ {0x2CBC, 0x905556, 5, 16, 512, 128, 2048, 64, 0x21044333, "MT29C4G96MAZA", 0},
++ {0x2CDA, 0x909506, 5, 8, 256, 128, 2048, 64, 0x30C77fff, "MT29F2G08ABAE", 0},
++ {0xADBC, 0x905554, 5, 16, 512, 128, 2048, 64, 0x10801011, "H9DA4GH4JJAMC", 0},
++ {0x01F1, 0x801D01, 4, 8, 128, 128, 2048, 64, 0x30C77fff, "S34ML01G100TF", 0},
++ {0x92F1, 0x8095FF, 4, 8, 128, 128, 2048, 64, 0x30C77fff, "F59L1G81A", 0},
++ {0xC8D1, 0x809540, 4, 8, 128, 128, 2048, 64, 0x30C77fff, "F59L1G81MA", 0},
++ {0xC8DA, 0x909544, 5, 8, 256, 128, 2048, 64, 0x30C77fff, "F59L2G81A", 0},
++ {0xC8DC, 0x909554, 5, 8, 512, 128, 2048, 64, 0x30C77fff, "F59L4G81A", 0},
++ {0xECD3, 0x519558, 5, 8, 1024, 128, 2048, 64, 0x44333, "K9K8G8000", 0},
++ {0xC2F1, 0x801DC2, 4, 8, 128, 128, 2048, 64, 0x30C77fff, "MX30LF1G08AA", 0},
++ {0xC2F1, 0x809502, 4, 8, 128, 128, 2048, 64, 0x30C77fff, "MX30LF1G18AC", 0},
++ {0x98D3, 0x902676, 5, 8, 1024, 256, 4096, 224, 0x00C25332, "TC58NVG3S0F", 0},
++ {0x01DA, 0x909546, 5, 8, 256, 128, 2048, 128, 0x30C77fff, "S34ML02G200TF", 0},
++ {0x01DC, 0x909556, 5, 8, 512, 128, 2048, 128, 0x30C77fff, "S34ML04G200TF", 0},
++ {0x0000, 0x000000, 0, 0, 0, 0, 0, 0, 0, "xxxxxxxxxx", 0},
++};
++
++
++#endif
+--- /dev/null
++++ b/drivers/mtd/nand/partition.h
+@@ -0,0 +1,115 @@
++/* Copyright Statement:
++ *
++ * This software/firmware and related documentation ("MediaTek Software") are
++ * protected under relevant copyright laws. The information contained herein
++ * is confidential and proprietary to MediaTek Inc. and/or its licensors.
++ * Without the prior written permission of MediaTek inc. and/or its licensors,
++ * any reproduction, modification, use or disclosure of MediaTek Software,
++ * and information contained herein, in whole or in part, shall be strictly prohibited.
++ */
++/* MediaTek Inc. (C) 2010. All rights reserved.
++ *
++ * BY OPENING THIS FILE, RECEIVER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
++ * THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
++ * RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO RECEIVER ON
++ * AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
++ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
++ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
++ * NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
++ * SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
++ * SUPPLIED WITH THE MEDIATEK SOFTWARE, AND RECEIVER AGREES TO LOOK ONLY TO SUCH
++ * THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. RECEIVER EXPRESSLY ACKNOWLEDGES
++ * THAT IT IS RECEIVER'S SOLE RESPONSIBILITY TO OBTAIN FROM ANY THIRD PARTY ALL PROPER LICENSES
++ * CONTAINED IN MEDIATEK SOFTWARE. MEDIATEK SHALL ALSO NOT BE RESPONSIBLE FOR ANY MEDIATEK
++ * SOFTWARE RELEASES MADE TO RECEIVER'S SPECIFICATION OR TO CONFORM TO A PARTICULAR
++ * STANDARD OR OPEN FORUM. RECEIVER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND
++ * CUMULATIVE LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
++ * AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
++ * OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY RECEIVER TO
++ * MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
++ *
++ * The following software/firmware and/or related documentation ("MediaTek Software")
++ * have been modified by MediaTek Inc. All revisions are subject to any receiver's
++ * applicable license agreements with MediaTek Inc.
++ */
++
++#include <linux/mtd/mtd.h>
++#include <linux/mtd/rawnand.h>
++#include <linux/mtd/partitions.h>
++
++#define RECONFIG_PARTITION_SIZE 1
++
++#define MTD_BOOT_PART_SIZE 0x80000
++#define MTD_CONFIG_PART_SIZE 0x20000
++#define MTD_FACTORY_PART_SIZE 0x20000
++
++extern unsigned int CFG_BLOCKSIZE;
++#define LARGE_MTD_BOOT_PART_SIZE (CFG_BLOCKSIZE<<2)
++#define LARGE_MTD_CONFIG_PART_SIZE (CFG_BLOCKSIZE<<2)
++#define LARGE_MTD_FACTORY_PART_SIZE (CFG_BLOCKSIZE<<1)
++
++/*=======================================================================*/
++/* NAND PARTITION Mapping */
++/*=======================================================================*/
++//#ifdef CONFIG_MTD_PARTITIONS
++static struct mtd_partition g_pasStatic_Partition[] = {
++ {
++ name: "ALL",
++ size: MTDPART_SIZ_FULL,
++ offset: 0,
++ },
++ /* Put your own partition definitions here */
++ {
++ name: "Bootloader",
++ size: MTD_BOOT_PART_SIZE,
++ offset: 0,
++ }, {
++ name: "Config",
++ size: MTD_CONFIG_PART_SIZE,
++ offset: MTDPART_OFS_APPEND
++ }, {
++ name: "Factory",
++ size: MTD_FACTORY_PART_SIZE,
++ offset: MTDPART_OFS_APPEND
++#ifdef CONFIG_RT2880_ROOTFS_IN_FLASH
++ }, {
++ name: "Kernel",
++ size: MTD_KERN_PART_SIZE,
++ offset: MTDPART_OFS_APPEND,
++ }, {
++ name: "RootFS",
++ size: MTD_ROOTFS_PART_SIZE,
++ offset: MTDPART_OFS_APPEND,
++#ifdef CONFIG_ROOTFS_IN_FLASH_NO_PADDING
++ }, {
++ name: "Kernel_RootFS",
++ size: MTD_KERN_PART_SIZE + MTD_ROOTFS_PART_SIZE,
++ offset: MTD_BOOT_PART_SIZE + MTD_CONFIG_PART_SIZE + MTD_FACTORY_PART_SIZE,
++#endif
++#else //CONFIG_RT2880_ROOTFS_IN_RAM
++ }, {
++ name: "Kernel",
++ size: 0x10000,
++ offset: MTDPART_OFS_APPEND,
++#endif
++#ifdef CONFIG_DUAL_IMAGE
++ }, {
++ name: "Kernel2",
++ size: MTD_KERN2_PART_SIZE,
++ offset: MTD_KERN2_PART_OFFSET,
++#ifdef CONFIG_RT2880_ROOTFS_IN_FLASH
++ }, {
++ name: "RootFS2",
++ size: MTD_ROOTFS2_PART_SIZE,
++ offset: MTD_ROOTFS2_PART_OFFSET,
++#endif
++#endif
++ }
++
++};
++
++#define NUM_PARTITIONS ARRAY_SIZE(g_pasStatic_Partition)
++extern int part_num; // = NUM_PARTITIONS;
++//#endif
++#undef RECONFIG_PARTITION_SIZE
++
diff --git a/target/linux/ramips/patches-5.4/0040-nand-hack.patch b/target/linux/ramips/patches-5.4/0040-nand-hack.patch
new file mode 100644
index 00000000000..58cdf1bce7e
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0040-nand-hack.patch
@@ -0,0 +1,32 @@
+--- a/drivers/mtd/nand/nand_base.c
++++ b/drivers/mtd/nand/nand_base.c
+@@ -1908,6 +1908,9 @@ static int nand_do_read_ops(struct mtd_i
+ __func__, buf);
+
+ read_retry:
++#ifdef CONFIG_MTK_MTD_NAND
++ ret = chip->read_page(mtd, chip, bufpoi, page);
++#else
+ if (nand_standard_page_accessors(&chip->ecc))
+ chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
+
+@@ -1927,6 +1930,7 @@ read_retry:
+ else
+ ret = chip->ecc.read_page(mtd, chip, bufpoi,
+ oob_required, page);
++#endif
+ if (ret < 0) {
+ if (use_bufpoi)
+ /* Invalidate page cache */
+--- a/include/linux/mtd/rawnand.h
++++ b/include/linux/mtd/rawnand.h
+@@ -897,6 +897,9 @@ struct nand_chip {
+ int (*setup_data_interface)(struct mtd_info *mtd, int chipnr,
+ const struct nand_data_interface *conf);
+
++#ifdef CONFIG_MTK_MTD_NAND
++ int (*read_page)(struct mtd_info *mtd, struct nand_chip *chip, u8 *buf, int page);
++#endif /* CONFIG_MTK_MTD_NAND */
+
+ int chip_delay;
+ unsigned int options;
diff --git a/target/linux/ramips/patches-5.4/0041-DT-Add-documentation-for-spi-rt2880.patch b/target/linux/ramips/patches-5.4/0041-DT-Add-documentation-for-spi-rt2880.patch
new file mode 100644
index 00000000000..e2643e3f254
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0041-DT-Add-documentation-for-spi-rt2880.patch
@@ -0,0 +1,44 @@
+From da6015e7f19d749f135f7ac55c4ec47b06faa868 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Fri, 9 Aug 2013 20:12:59 +0200
+Subject: [PATCH 41/53] DT: Add documentation for spi-rt2880
+
+Describe the SPI master found on the MIPS based Ralink RT2880 SoC.
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ .../devicetree/bindings/spi/spi-rt2880.txt | 28 ++++++++++++++++++++
+ 1 file changed, 28 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/spi/spi-rt2880.txt
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/spi/spi-rt2880.txt
+@@ -0,0 +1,28 @@
++Ralink SoC RT2880 SPI master controller.
++
++This SPI controller is found on most wireless SoCs made by ralink.
++
++Required properties:
++- compatible : "ralink,rt2880-spi"
++- reg : The register base for the controller.
++- #address-cells : <1>, as required by generic SPI binding.
++- #size-cells : <0>, also as required by generic SPI binding.
++
++Child nodes as per the generic SPI binding.
++
++Example:
++
++ spi@b00 {
++ compatible = "ralink,rt2880-spi";
++ reg = <0xb00 0x100>;
++
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ m25p80@0 {
++ compatible = "m25p80";
++ reg = <0>;
++ spi-max-frequency = <10000000>;
++ };
++ };
++
diff --git a/target/linux/ramips/patches-5.4/0042-SPI-ralink-add-Ralink-SoC-spi-driver.patch b/target/linux/ramips/patches-5.4/0042-SPI-ralink-add-Ralink-SoC-spi-driver.patch
new file mode 100644
index 00000000000..1dd9f40c39c
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0042-SPI-ralink-add-Ralink-SoC-spi-driver.patch
@@ -0,0 +1,574 @@
+From 683af4ebb91a1600df1946ac4769d916b8a1be65 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 27 Jul 2014 11:15:12 +0100
+Subject: [PATCH 42/53] SPI: ralink: add Ralink SoC spi driver
+
+Add the driver needed to make SPI work on Ralink SoC.
+
+Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
+Acked-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/spi/Kconfig | 6 +
+ drivers/spi/Makefile | 1 +
+ drivers/spi/spi-rt2880.c | 530 ++++++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 537 insertions(+)
+ create mode 100644 drivers/spi/spi-rt2880.c
+
+--- a/drivers/spi/Kconfig
++++ b/drivers/spi/Kconfig
+@@ -563,6 +563,12 @@ config SPI_QUP
+ This driver can also be built as a module. If so, the module
+ will be called spi_qup.
+
++config SPI_RT2880
++ tristate "Ralink RT288x SPI Controller"
++ depends on RALINK
++ help
++ This selects a driver for the Ralink RT288x/RT305x SPI Controller.
++
+ config SPI_S3C24XX
+ tristate "Samsung S3C24XX series SPI"
+ depends on ARCH_S3C24XX
+--- a/drivers/spi/Makefile
++++ b/drivers/spi/Makefile
+@@ -81,6 +81,7 @@ obj-$(CONFIG_SPI_QUP) += spi-qup.o
+ obj-$(CONFIG_SPI_ROCKCHIP) += spi-rockchip.o
+ obj-$(CONFIG_SPI_RB4XX) += spi-rb4xx.o
+ obj-$(CONFIG_SPI_RSPI) += spi-rspi.o
++obj-$(CONFIG_SPI_RT2880) += spi-rt2880.o
+ obj-$(CONFIG_SPI_S3C24XX) += spi-s3c24xx-hw.o
+ spi-s3c24xx-hw-y := spi-s3c24xx.o
+ spi-s3c24xx-hw-$(CONFIG_SPI_S3C24XX_FIQ) += spi-s3c24xx-fiq.o
+--- /dev/null
++++ b/drivers/spi/spi-rt2880.c
+@@ -0,0 +1,530 @@
++/*
++ * spi-rt2880.c -- Ralink RT288x/RT305x SPI controller driver
++ *
++ * Copyright (C) 2011 Sergiy <piratfm@gmail.com>
++ * Copyright (C) 2011-2013 Gabor Juhos <juhosg@openwrt.org>
++ *
++ * Some parts are based on spi-orion.c:
++ * Author: Shadi Ammouri <shadi@marvell.com>
++ * Copyright (C) 2007-2008 Marvell Ltd.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/clk.h>
++#include <linux/err.h>
++#include <linux/delay.h>
++#include <linux/io.h>
++#include <linux/reset.h>
++#include <linux/spi/spi.h>
++#include <linux/platform_device.h>
++#include <linux/gpio.h>
++
++#define DRIVER_NAME "spi-rt2880"
++
++#define RAMIPS_SPI_STAT 0x00
++#define RAMIPS_SPI_CFG 0x10
++#define RAMIPS_SPI_CTL 0x14
++#define RAMIPS_SPI_DATA 0x20
++#define RAMIPS_SPI_ADDR 0x24
++#define RAMIPS_SPI_BS 0x28
++#define RAMIPS_SPI_USER 0x2C
++#define RAMIPS_SPI_TXFIFO 0x30
++#define RAMIPS_SPI_RXFIFO 0x34
++#define RAMIPS_SPI_FIFO_STAT 0x38
++#define RAMIPS_SPI_MODE 0x3C
++#define RAMIPS_SPI_DEV_OFFSET 0x40
++#define RAMIPS_SPI_DMA 0x80
++#define RAMIPS_SPI_DMASTAT 0x84
++#define RAMIPS_SPI_ARBITER 0xF0
++
++/* SPISTAT register bit field */
++#define SPISTAT_BUSY BIT(0)
++
++/* SPICFG register bit field */
++#define SPICFG_ADDRMODE BIT(12)
++#define SPICFG_RXENVDIS BIT(11)
++#define SPICFG_RXCAP BIT(10)
++#define SPICFG_SPIENMODE BIT(9)
++#define SPICFG_MSBFIRST BIT(8)
++#define SPICFG_SPICLKPOL BIT(6)
++#define SPICFG_RXCLKEDGE_FALLING BIT(5)
++#define SPICFG_TXCLKEDGE_FALLING BIT(4)
++#define SPICFG_HIZSPI BIT(3)
++#define SPICFG_SPICLK_PRESCALE_MASK 0x7
++#define SPICFG_SPICLK_DIV2 0
++#define SPICFG_SPICLK_DIV4 1
++#define SPICFG_SPICLK_DIV8 2
++#define SPICFG_SPICLK_DIV16 3
++#define SPICFG_SPICLK_DIV32 4
++#define SPICFG_SPICLK_DIV64 5
++#define SPICFG_SPICLK_DIV128 6
++#define SPICFG_SPICLK_DISABLE 7
++
++/* SPICTL register bit field */
++#define SPICTL_START BIT(4)
++#define SPICTL_HIZSDO BIT(3)
++#define SPICTL_STARTWR BIT(2)
++#define SPICTL_STARTRD BIT(1)
++#define SPICTL_SPIENA BIT(0)
++
++/* SPIUSER register bit field */
++#define SPIUSER_USERMODE BIT(21)
++#define SPIUSER_INSTR_PHASE BIT(20)
++#define SPIUSER_ADDR_PHASE_MASK 0x7
++#define SPIUSER_ADDR_PHASE_OFFSET 17
++#define SPIUSER_MODE_PHASE BIT(16)
++#define SPIUSER_DUMMY_PHASE_MASK 0x3
++#define SPIUSER_DUMMY_PHASE_OFFSET 14
++#define SPIUSER_DATA_PHASE_MASK 0x3
++#define SPIUSER_DATA_PHASE_OFFSET 12
++#define SPIUSER_DATA_READ (BIT(0) << SPIUSER_DATA_PHASE_OFFSET)
++#define SPIUSER_DATA_WRITE (BIT(1) << SPIUSER_DATA_PHASE_OFFSET)
++#define SPIUSER_ADDR_TYPE_OFFSET 9
++#define SPIUSER_MODE_TYPE_OFFSET 6
++#define SPIUSER_DUMMY_TYPE_OFFSET 3
++#define SPIUSER_DATA_TYPE_OFFSET 0
++#define SPIUSER_TRANSFER_MASK 0x7
++#define SPIUSER_TRANSFER_SINGLE BIT(0)
++#define SPIUSER_TRANSFER_DUAL BIT(1)
++#define SPIUSER_TRANSFER_QUAD BIT(2)
++
++#define SPIUSER_TRANSFER_TYPE(type) ( \
++ (type << SPIUSER_ADDR_TYPE_OFFSET) | \
++ (type << SPIUSER_MODE_TYPE_OFFSET) | \
++ (type << SPIUSER_DUMMY_TYPE_OFFSET) | \
++ (type << SPIUSER_DATA_TYPE_OFFSET) \
++)
++
++/* SPIFIFOSTAT register bit field */
++#define SPIFIFOSTAT_TXEMPTY BIT(19)
++#define SPIFIFOSTAT_RXEMPTY BIT(18)
++#define SPIFIFOSTAT_TXFULL BIT(17)
++#define SPIFIFOSTAT_RXFULL BIT(16)
++#define SPIFIFOSTAT_FIFO_MASK 0xff
++#define SPIFIFOSTAT_TX_OFFSET 8
++#define SPIFIFOSTAT_RX_OFFSET 0
++
++#define SPI_FIFO_DEPTH 16
++
++/* SPIMODE register bit field */
++#define SPIMODE_MODE_OFFSET 24
++#define SPIMODE_DUMMY_OFFSET 0
++
++/* SPIARB register bit field */
++#define SPICTL_ARB_EN BIT(31)
++#define SPICTL_CSCTL1 BIT(16)
++#define SPI1_POR BIT(1)
++#define SPI0_POR BIT(0)
++
++#define RT2880_SPI_MODE_BITS (SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST | \
++ SPI_CS_HIGH)
++
++static atomic_t hw_reset_count = ATOMIC_INIT(0);
++
++struct rt2880_spi {
++ struct spi_master *master;
++ void __iomem *base;
++ u32 speed;
++ u16 wait_loops;
++ u16 mode;
++ struct clk *clk;
++};
++
++static inline struct rt2880_spi *spidev_to_rt2880_spi(struct spi_device *spi)
++{
++ return spi_master_get_devdata(spi->master);
++}
++
++static inline u32 rt2880_spi_read(struct rt2880_spi *rs, u32 reg)
++{
++ return ioread32(rs->base + reg);
++}
++
++static inline void rt2880_spi_write(struct rt2880_spi *rs, u32 reg,
++ const u32 val)
++{
++ iowrite32(val, rs->base + reg);
++}
++
++static inline void rt2880_spi_setbits(struct rt2880_spi *rs, u32 reg, u32 mask)
++{
++ void __iomem *addr = rs->base + reg;
++
++ iowrite32((ioread32(addr) | mask), addr);
++}
++
++static inline void rt2880_spi_clrbits(struct rt2880_spi *rs, u32 reg, u32 mask)
++{
++ void __iomem *addr = rs->base + reg;
++
++ iowrite32((ioread32(addr) & ~mask), addr);
++}
++
++static u32 rt2880_spi_baudrate_get(struct spi_device *spi, unsigned int speed)
++{
++ struct rt2880_spi *rs = spidev_to_rt2880_spi(spi);
++ u32 rate;
++ u32 prescale;
++
++ /*
++ * the supported rates are: 2, 4, 8, ... 128
++ * round up as we look for equal or less speed
++ */
++ rate = DIV_ROUND_UP(clk_get_rate(rs->clk), speed);
++ rate = roundup_pow_of_two(rate);
++
++ /* Convert the rate to SPI clock divisor value. */
++ prescale = ilog2(rate / 2);
++
++ /* some tolerance. double and add 100 */
++ rs->wait_loops = (8 * HZ * loops_per_jiffy) /
++ (clk_get_rate(rs->clk) / rate);
++ rs->wait_loops = (rs->wait_loops << 1) + 100;
++ rs->speed = speed;
++
++ dev_dbg(&spi->dev, "speed: %lu/%u, rate: %u, prescal: %u, loops: %hu\n",
++ clk_get_rate(rs->clk) / rate, speed, rate, prescale,
++ rs->wait_loops);
++
++ return prescale;
++}
++
++static u32 get_arbiter_offset(struct spi_master *master)
++{
++ u32 offset;
++
++ offset = RAMIPS_SPI_ARBITER;
++ if (master->bus_num == 1)
++ offset -= RAMIPS_SPI_DEV_OFFSET;
++
++ return offset;
++}
++
++static void rt2880_spi_set_cs(struct spi_device *spi, bool enable)
++{
++ struct rt2880_spi *rs = spidev_to_rt2880_spi(spi);
++
++ if (enable)
++ rt2880_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_SPIENA);
++ else
++ rt2880_spi_clrbits(rs, RAMIPS_SPI_CTL, SPICTL_SPIENA);
++}
++
++static int rt2880_spi_wait_ready(struct rt2880_spi *rs, int len)
++{
++ int loop = rs->wait_loops * len;
++
++ while ((rt2880_spi_read(rs, RAMIPS_SPI_STAT) & SPISTAT_BUSY) && --loop)
++ cpu_relax();
++
++ if (loop)
++ return 0;
++
++ return -ETIMEDOUT;
++}
++
++static void rt2880_dump_reg(struct spi_master *master)
++{
++ struct rt2880_spi *rs = spi_master_get_devdata(master);
++
++ dev_dbg(&master->dev, "stat: %08x, cfg: %08x, ctl: %08x, " \
++ "data: %08x, arb: %08x\n",
++ rt2880_spi_read(rs, RAMIPS_SPI_STAT),
++ rt2880_spi_read(rs, RAMIPS_SPI_CFG),
++ rt2880_spi_read(rs, RAMIPS_SPI_CTL),
++ rt2880_spi_read(rs, RAMIPS_SPI_DATA),
++ rt2880_spi_read(rs, get_arbiter_offset(master)));
++}
++
++static int rt2880_spi_transfer_one(struct spi_master *master,
++ struct spi_device *spi, struct spi_transfer *xfer)
++{
++ struct rt2880_spi *rs = spi_master_get_devdata(master);
++ unsigned len;
++ const u8 *tx = xfer->tx_buf;
++ u8 *rx = xfer->rx_buf;
++ int err = 0;
++
++ /* change clock speed */
++ if (unlikely(rs->speed != xfer->speed_hz)) {
++ u32 reg;
++ reg = rt2880_spi_read(rs, RAMIPS_SPI_CFG);
++ reg &= ~SPICFG_SPICLK_PRESCALE_MASK;
++ reg |= rt2880_spi_baudrate_get(spi, xfer->speed_hz);
++ rt2880_spi_write(rs, RAMIPS_SPI_CFG, reg);
++ }
++
++ if (tx) {
++ len = xfer->len;
++ while (len-- > 0) {
++ rt2880_spi_write(rs, RAMIPS_SPI_DATA, *tx++);
++ rt2880_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_STARTWR);
++ err = rt2880_spi_wait_ready(rs, 1);
++ if (err) {
++ dev_err(&spi->dev, "TX failed, err=%d\n", err);
++ goto out;
++ }
++ }
++ }
++
++ if (rx) {
++ len = xfer->len;
++ while (len-- > 0) {
++ rt2880_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_STARTRD);
++ err = rt2880_spi_wait_ready(rs, 1);
++ if (err) {
++ dev_err(&spi->dev, "RX failed, err=%d\n", err);
++ goto out;
++ }
++ *rx++ = (u8) rt2880_spi_read(rs, RAMIPS_SPI_DATA);
++ }
++ }
++
++out:
++ return err;
++}
++
++/* copy from spi.c */
++static void spi_set_cs(struct spi_device *spi, bool enable)
++{
++ if (spi->mode & SPI_CS_HIGH)
++ enable = !enable;
++
++ if (spi->cs_gpio >= 0)
++ gpio_set_value(spi->cs_gpio, !enable);
++ else if (spi->master->set_cs)
++ spi->master->set_cs(spi, !enable);
++}
++
++static int rt2880_spi_setup(struct spi_device *spi)
++{
++ struct spi_master *master = spi->master;
++ struct rt2880_spi *rs = spi_master_get_devdata(master);
++ u32 reg, old_reg, arbit_off;
++
++ if ((spi->max_speed_hz > master->max_speed_hz) ||
++ (spi->max_speed_hz < master->min_speed_hz)) {
++ dev_err(&spi->dev, "invalide requested speed %d Hz\n",
++ spi->max_speed_hz);
++ return -EINVAL;
++ }
++
++ if (!(master->bits_per_word_mask &
++ BIT(spi->bits_per_word - 1))) {
++ dev_err(&spi->dev, "invalide bits_per_word %d\n",
++ spi->bits_per_word);
++ return -EINVAL;
++ }
++
++ /* the hardware seems can't work on mode0 force it to mode3 */
++ if ((spi->mode & (SPI_CPOL | SPI_CPHA)) == SPI_MODE_0) {
++ dev_warn(&spi->dev, "force spi mode3\n");
++ spi->mode |= SPI_MODE_3;
++ }
++
++ /* chip polarity */
++ arbit_off = get_arbiter_offset(master);
++ reg = old_reg = rt2880_spi_read(rs, arbit_off);
++ if (spi->mode & SPI_CS_HIGH) {
++ switch (master->bus_num) {
++ case 1:
++ reg |= SPI1_POR;
++ break;
++ default:
++ reg |= SPI0_POR;
++ break;
++ }
++ } else {
++ switch (master->bus_num) {
++ case 1:
++ reg &= ~SPI1_POR;
++ break;
++ default:
++ reg &= ~SPI0_POR;
++ break;
++ }
++ }
++
++ /* enable spi1 */
++ if (master->bus_num == 1)
++ reg |= SPICTL_ARB_EN;
++
++ if (reg != old_reg)
++ rt2880_spi_write(rs, arbit_off, reg);
++
++ /* deselected the spi device */
++ spi_set_cs(spi, false);
++
++ rt2880_dump_reg(master);
++
++ return 0;
++}
++
++static int rt2880_spi_prepare_message(struct spi_master *master,
++ struct spi_message *msg)
++{
++ struct rt2880_spi *rs = spi_master_get_devdata(master);
++ struct spi_device *spi = msg->spi;
++ u32 reg;
++
++ if ((rs->mode == spi->mode) && (rs->speed == spi->max_speed_hz))
++ return 0;
++
++#if 0
++ /* set spido to tri-state */
++ rt2880_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_HIZSDO);
++#endif
++
++ reg = rt2880_spi_read(rs, RAMIPS_SPI_CFG);
++
++ reg &= ~(SPICFG_MSBFIRST | SPICFG_SPICLKPOL |
++ SPICFG_RXCLKEDGE_FALLING |
++ SPICFG_TXCLKEDGE_FALLING |
++ SPICFG_SPICLK_PRESCALE_MASK);
++
++ /* MSB */
++ if (!(spi->mode & SPI_LSB_FIRST))
++ reg |= SPICFG_MSBFIRST;
++
++ /* spi mode */
++ switch (spi->mode & (SPI_CPOL | SPI_CPHA)) {
++ case SPI_MODE_0:
++ reg |= SPICFG_TXCLKEDGE_FALLING;
++ break;
++ case SPI_MODE_1:
++ reg |= SPICFG_RXCLKEDGE_FALLING;
++ break;
++ case SPI_MODE_2:
++ reg |= SPICFG_SPICLKPOL | SPICFG_RXCLKEDGE_FALLING;
++ break;
++ case SPI_MODE_3:
++ reg |= SPICFG_SPICLKPOL | SPICFG_TXCLKEDGE_FALLING;
++ break;
++ }
++ rs->mode = spi->mode;
++
++#if 0
++ /* set spiclk and spiena to tri-state */
++ reg |= SPICFG_HIZSPI;
++#endif
++
++ /* clock divide */
++ reg |= rt2880_spi_baudrate_get(spi, spi->max_speed_hz);
++
++ rt2880_spi_write(rs, RAMIPS_SPI_CFG, reg);
++
++ return 0;
++}
++
++static int rt2880_spi_probe(struct platform_device *pdev)
++{
++ struct spi_master *master;
++ struct rt2880_spi *rs;
++ void __iomem *base;
++ struct resource *r;
++ struct clk *clk;
++ int ret;
++
++ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ base = devm_ioremap_resource(&pdev->dev, r);
++ if (IS_ERR(base))
++ return PTR_ERR(base);
++
++ clk = devm_clk_get(&pdev->dev, NULL);
++ if (IS_ERR(clk)) {
++ dev_err(&pdev->dev, "unable to get SYS clock\n");
++ return PTR_ERR(clk);
++ }
++
++ ret = clk_prepare_enable(clk);
++ if (ret)
++ goto err_clk;
++
++ master = spi_alloc_master(&pdev->dev, sizeof(*rs));
++ if (master == NULL) {
++ dev_dbg(&pdev->dev, "master allocation failed\n");
++ ret = -ENOMEM;
++ goto err_clk;
++ }
++
++ master->dev.of_node = pdev->dev.of_node;
++ master->mode_bits = RT2880_SPI_MODE_BITS;
++ master->bits_per_word_mask = SPI_BPW_MASK(8);
++ master->min_speed_hz = clk_get_rate(clk) / 128;
++ master->max_speed_hz = clk_get_rate(clk) / 2;
++ master->flags = SPI_MASTER_HALF_DUPLEX;
++ master->setup = rt2880_spi_setup;
++ master->prepare_message = rt2880_spi_prepare_message;
++ master->set_cs = rt2880_spi_set_cs;
++ master->transfer_one = rt2880_spi_transfer_one,
++
++ dev_set_drvdata(&pdev->dev, master);
++
++ rs = spi_master_get_devdata(master);
++ rs->master = master;
++ rs->base = base;
++ rs->clk = clk;
++
++ if (atomic_inc_return(&hw_reset_count) == 1)
++ device_reset(&pdev->dev);
++
++ ret = devm_spi_register_master(&pdev->dev, master);
++ if (ret < 0) {
++ dev_err(&pdev->dev, "devm_spi_register_master error.\n");
++ goto err_master;
++ }
++
++ return ret;
++
++err_master:
++ spi_master_put(master);
++ kfree(master);
++err_clk:
++ clk_disable_unprepare(clk);
++
++ return ret;
++}
++
++static int rt2880_spi_remove(struct platform_device *pdev)
++{
++ struct spi_master *master;
++ struct rt2880_spi *rs;
++
++ master = dev_get_drvdata(&pdev->dev);
++ rs = spi_master_get_devdata(master);
++
++ clk_disable_unprepare(rs->clk);
++ atomic_dec(&hw_reset_count);
++
++ return 0;
++}
++
++MODULE_ALIAS("platform:" DRIVER_NAME);
++
++static const struct of_device_id rt2880_spi_match[] = {
++ { .compatible = "ralink,rt2880-spi" },
++ {},
++};
++MODULE_DEVICE_TABLE(of, rt2880_spi_match);
++
++static struct platform_driver rt2880_spi_driver = {
++ .driver = {
++ .name = DRIVER_NAME,
++ .owner = THIS_MODULE,
++ .of_match_table = rt2880_spi_match,
++ },
++ .probe = rt2880_spi_probe,
++ .remove = rt2880_spi_remove,
++};
++
++module_platform_driver(rt2880_spi_driver);
++
++MODULE_DESCRIPTION("Ralink SPI driver");
++MODULE_AUTHOR("Sergiy <piratfm@gmail.com>");
++MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
++MODULE_LICENSE("GPL");
diff --git a/target/linux/ramips/patches-5.4/0043-spi-add-mt7621-support.patch b/target/linux/ramips/patches-5.4/0043-spi-add-mt7621-support.patch
new file mode 100644
index 00000000000..b607f2bdf42
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0043-spi-add-mt7621-support.patch
@@ -0,0 +1,487 @@
+From cbd66c626e16743b05af807ad48012c0a097b9fb Mon Sep 17 00:00:00 2001
+From: Stefan Roese <sr@denx.de>
+Date: Mon, 25 Mar 2019 09:29:25 +0100
+Subject: [PATCH] spi: mt7621: Move SPI driver out of staging
+
+This patch moves the MT7621 SPI driver, which is used on some Ralink /
+MediaTek MT76xx MIPS SoC's, out of the staging directory. No changes to
+the source code are done in this patch.
+
+This driver version was tested successfully on an MT7688 based platform
+with an SPI NOR on CS0 and an SPI NAND on CS1 without any issues (so
+far).
+
+This patch also documents the devicetree bindings for the MT7621 SPI
+device driver.
+
+Signed-off-by: Stefan Roese <sr@denx.de>
+Cc: Rob Herring <robh@kernel.org>
+Cc: Mark Brown <broonie@kernel.org>
+Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Cc: NeilBrown <neil@brown.name>
+Cc: Sankalp Negi <sankalpnegi2310@gmail.com>
+Cc: Chuanhong Guo <gch981213@gmail.com>
+Cc: John Crispin <john@phrozen.org>
+Cc: Armando Miraglia <arma2ff0@gmail.com>
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ .../devicetree/bindings/spi/spi-mt7621.txt | 26 ++++++
+ drivers/spi/Kconfig | 6 ++
+ drivers/spi/Makefile | 1 +
+ .../{staging/mt7621-spi => spi}/spi-mt7621.c | 83 +++++++++----------
+ drivers/staging/Kconfig | 2 -
+ drivers/staging/Makefile | 1 -
+ drivers/staging/mt7621-spi/Kconfig | 6 --
+ drivers/staging/mt7621-spi/Makefile | 1 -
+ drivers/staging/mt7621-spi/TODO | 5 --
+ 9 files changed, 74 insertions(+), 57 deletions(-)
+ create mode 100644 Documentation/devicetree/bindings/spi/spi-mt7621.txt
+ rename drivers/{staging/mt7621-spi => spi}/spi-mt7621.c (88%)
+ delete mode 100644 drivers/staging/mt7621-spi/Kconfig
+ delete mode 100644 drivers/staging/mt7621-spi/Makefile
+ delete mode 100644 drivers/staging/mt7621-spi/TODO
+
+--- a/drivers/spi/Kconfig
++++ b/drivers/spi/Kconfig
+@@ -569,6 +569,12 @@ config SPI_RT2880
+ help
+ This selects a driver for the Ralink RT288x/RT305x SPI Controller.
+
++config SPI_MT7621
++ tristate "MediaTek MT7621 SPI Controller"
++ depends on RALINK
++ help
++ This selects a driver for the MediaTek MT7621 SPI Controller.
++
+ config SPI_S3C24XX
+ tristate "Samsung S3C24XX series SPI"
+ depends on ARCH_S3C24XX
+--- a/drivers/spi/Makefile
++++ b/drivers/spi/Makefile
+@@ -60,6 +60,7 @@ obj-$(CONFIG_SPI_MPC512x_PSC) += spi-mp
+ obj-$(CONFIG_SPI_MPC52xx_PSC) += spi-mpc52xx-psc.o
+ obj-$(CONFIG_SPI_MPC52xx) += spi-mpc52xx.o
+ obj-$(CONFIG_SPI_MT65XX) += spi-mt65xx.o
++obj-$(CONFIG_SPI_MT7621) += spi-mt7621.o
+ obj-$(CONFIG_SPI_MXS) += spi-mxs.o
+ obj-$(CONFIG_SPI_NUC900) += spi-nuc900.o
+ obj-$(CONFIG_SPI_OC_TINY) += spi-oc-tiny.o
+--- /dev/null
++++ b/drivers/spi/spi-mt7621.c
+@@ -0,0 +1,416 @@
++// SPDX-License-Identifier: GPL-2.0
++//
++// spi-mt7621.c -- MediaTek MT7621 SPI controller driver
++//
++// Copyright (C) 2011 Sergiy <piratfm@gmail.com>
++// Copyright (C) 2011-2013 Gabor Juhos <juhosg@openwrt.org>
++// Copyright (C) 2014-2015 Felix Fietkau <nbd@nbd.name>
++//
++// Some parts are based on spi-orion.c:
++// Author: Shadi Ammouri <shadi@marvell.com>
++// Copyright (C) 2007-2008 Marvell Ltd.
++
++#include <linux/clk.h>
++#include <linux/delay.h>
++#include <linux/io.h>
++#include <linux/module.h>
++#include <linux/of_device.h>
++#include <linux/reset.h>
++#include <linux/spi/spi.h>
++
++#define DRIVER_NAME "spi-mt7621"
++
++/* in usec */
++#define RALINK_SPI_WAIT_MAX_LOOP 2000
++
++/* SPISTAT register bit field */
++#define SPISTAT_BUSY BIT(0)
++
++#define MT7621_SPI_TRANS 0x00
++#define SPITRANS_BUSY BIT(16)
++
++#define MT7621_SPI_OPCODE 0x04
++#define MT7621_SPI_DATA0 0x08
++#define MT7621_SPI_DATA4 0x18
++#define SPI_CTL_TX_RX_CNT_MASK 0xff
++#define SPI_CTL_START BIT(8)
++
++#define MT7621_SPI_MASTER 0x28
++#define MASTER_MORE_BUFMODE BIT(2)
++#define MASTER_FULL_DUPLEX BIT(10)
++#define MASTER_RS_CLK_SEL GENMASK(27, 16)
++#define MASTER_RS_CLK_SEL_SHIFT 16
++#define MASTER_RS_SLAVE_SEL GENMASK(31, 29)
++
++#define MT7621_SPI_MOREBUF 0x2c
++#define MT7621_SPI_POLAR 0x38
++#define MT7621_SPI_SPACE 0x3c
++
++#define MT7621_CPHA BIT(5)
++#define MT7621_CPOL BIT(4)
++#define MT7621_LSB_FIRST BIT(3)
++
++struct mt7621_spi {
++ struct spi_controller *master;
++ void __iomem *base;
++ unsigned int sys_freq;
++ unsigned int speed;
++ struct clk *clk;
++ int pending_write;
++};
++
++static inline struct mt7621_spi *spidev_to_mt7621_spi(struct spi_device *spi)
++{
++ return spi_controller_get_devdata(spi->master);
++}
++
++static inline u32 mt7621_spi_read(struct mt7621_spi *rs, u32 reg)
++{
++ return ioread32(rs->base + reg);
++}
++
++static inline void mt7621_spi_write(struct mt7621_spi *rs, u32 reg, u32 val)
++{
++ iowrite32(val, rs->base + reg);
++}
++
++static void mt7621_spi_set_cs(struct spi_device *spi, int enable)
++{
++ struct mt7621_spi *rs = spidev_to_mt7621_spi(spi);
++ int cs = spi->chip_select;
++ u32 polar = 0;
++ u32 master;
++
++ /*
++ * Select SPI device 7, enable "more buffer mode" and disable
++ * full-duplex (only half-duplex really works on this chip
++ * reliably)
++ */
++ master = mt7621_spi_read(rs, MT7621_SPI_MASTER);
++ master |= MASTER_RS_SLAVE_SEL | MASTER_MORE_BUFMODE;
++ master &= ~MASTER_FULL_DUPLEX;
++ mt7621_spi_write(rs, MT7621_SPI_MASTER, master);
++
++ rs->pending_write = 0;
++
++ if (enable)
++ polar = BIT(cs);
++ mt7621_spi_write(rs, MT7621_SPI_POLAR, polar);
++}
++
++static int mt7621_spi_prepare(struct spi_device *spi, unsigned int speed)
++{
++ struct mt7621_spi *rs = spidev_to_mt7621_spi(spi);
++ u32 rate;
++ u32 reg;
++
++ dev_dbg(&spi->dev, "speed:%u\n", speed);
++
++ rate = DIV_ROUND_UP(rs->sys_freq, speed);
++ dev_dbg(&spi->dev, "rate-1:%u\n", rate);
++
++ if (rate > 4097)
++ return -EINVAL;
++
++ if (rate < 2)
++ rate = 2;
++
++ reg = mt7621_spi_read(rs, MT7621_SPI_MASTER);
++ reg &= ~MASTER_RS_CLK_SEL;
++ reg |= (rate - 2) << MASTER_RS_CLK_SEL_SHIFT;
++ rs->speed = speed;
++
++ reg &= ~MT7621_LSB_FIRST;
++ if (spi->mode & SPI_LSB_FIRST)
++ reg |= MT7621_LSB_FIRST;
++
++ /*
++ * This SPI controller seems to be tested on SPI flash only and some
++ * bits are swizzled under other SPI modes probably due to incorrect
++ * wiring inside the silicon. Only mode 0 works correctly.
++ */
++ reg &= ~(MT7621_CPHA | MT7621_CPOL);
++
++ mt7621_spi_write(rs, MT7621_SPI_MASTER, reg);
++
++ return 0;
++}
++
++static inline int mt7621_spi_wait_till_ready(struct mt7621_spi *rs)
++{
++ int i;
++
++ for (i = 0; i < RALINK_SPI_WAIT_MAX_LOOP; i++) {
++ u32 status;
++
++ status = mt7621_spi_read(rs, MT7621_SPI_TRANS);
++ if ((status & SPITRANS_BUSY) == 0)
++ return 0;
++ cpu_relax();
++ udelay(1);
++ }
++
++ return -ETIMEDOUT;
++}
++
++static void mt7621_spi_read_half_duplex(struct mt7621_spi *rs,
++ int rx_len, u8 *buf)
++{
++ int tx_len;
++
++ /*
++ * Combine with any pending write, and perform one or more half-duplex
++ * transactions reading 'len' bytes. Data to be written is already in
++ * MT7621_SPI_DATA.
++ */
++ tx_len = rs->pending_write;
++ rs->pending_write = 0;
++
++ while (rx_len || tx_len) {
++ int i;
++ u32 val = (min(tx_len, 4) * 8) << 24;
++ int rx = min(rx_len, 32);
++
++ if (tx_len > 4)
++ val |= (tx_len - 4) * 8;
++ val |= (rx * 8) << 12;
++ mt7621_spi_write(rs, MT7621_SPI_MOREBUF, val);
++
++ tx_len = 0;
++
++ val = mt7621_spi_read(rs, MT7621_SPI_TRANS);
++ val |= SPI_CTL_START;
++ mt7621_spi_write(rs, MT7621_SPI_TRANS, val);
++
++ mt7621_spi_wait_till_ready(rs);
++
++ for (i = 0; i < rx; i++) {
++ if ((i % 4) == 0)
++ val = mt7621_spi_read(rs, MT7621_SPI_DATA0 + i);
++ *buf++ = val & 0xff;
++ val >>= 8;
++ }
++
++ rx_len -= i;
++ }
++}
++
++static inline void mt7621_spi_flush(struct mt7621_spi *rs)
++{
++ mt7621_spi_read_half_duplex(rs, 0, NULL);
++}
++
++static void mt7621_spi_write_half_duplex(struct mt7621_spi *rs,
++ int tx_len, const u8 *buf)
++{
++ int len = rs->pending_write;
++ int val = 0;
++
++ if (len & 3) {
++ val = mt7621_spi_read(rs, MT7621_SPI_OPCODE + (len & ~3));
++ if (len < 4) {
++ val <<= (4 - len) * 8;
++ val = swab32(val);
++ }
++ }
++
++ while (tx_len > 0) {
++ if (len >= 36) {
++ rs->pending_write = len;
++ mt7621_spi_flush(rs);
++ len = 0;
++ }
++
++ val |= *buf++ << (8 * (len & 3));
++ len++;
++ if ((len & 3) == 0) {
++ if (len == 4)
++ /* The byte-order of the opcode is weird! */
++ val = swab32(val);
++ mt7621_spi_write(rs, MT7621_SPI_OPCODE + len - 4, val);
++ val = 0;
++ }
++ tx_len -= 1;
++ }
++
++ if (len & 3) {
++ if (len < 4) {
++ val = swab32(val);
++ val >>= (4 - len) * 8;
++ }
++ mt7621_spi_write(rs, MT7621_SPI_OPCODE + (len & ~3), val);
++ }
++
++ rs->pending_write = len;
++}
++
++static int mt7621_spi_transfer_one_message(struct spi_controller *master,
++ struct spi_message *m)
++{
++ struct mt7621_spi *rs = spi_controller_get_devdata(master);
++ struct spi_device *spi = m->spi;
++ unsigned int speed = spi->max_speed_hz;
++ struct spi_transfer *t = NULL;
++ int status = 0;
++
++ mt7621_spi_wait_till_ready(rs);
++
++ list_for_each_entry(t, &m->transfers, transfer_list)
++ if (t->speed_hz < speed)
++ speed = t->speed_hz;
++
++ if (mt7621_spi_prepare(spi, speed)) {
++ status = -EIO;
++ goto msg_done;
++ }
++
++ /* Assert CS */
++ mt7621_spi_set_cs(spi, 1);
++
++ m->actual_length = 0;
++ list_for_each_entry(t, &m->transfers, transfer_list) {
++ if ((t->rx_buf) && (t->tx_buf)) {
++ /*
++ * This controller will shift some extra data out
++ * of spi_opcode if (mosi_bit_cnt > 0) &&
++ * (cmd_bit_cnt == 0). So the claimed full-duplex
++ * support is broken since we have no way to read
++ * the MISO value during that bit.
++ */
++ status = -EIO;
++ goto msg_done;
++ } else if (t->rx_buf) {
++ mt7621_spi_read_half_duplex(rs, t->len, t->rx_buf);
++ } else if (t->tx_buf) {
++ mt7621_spi_write_half_duplex(rs, t->len, t->tx_buf);
++ }
++ m->actual_length += t->len;
++ }
++
++ /* Flush data and deassert CS */
++ mt7621_spi_flush(rs);
++ mt7621_spi_set_cs(spi, 0);
++
++msg_done:
++ m->status = status;
++ spi_finalize_current_message(master);
++
++ return 0;
++}
++
++static int mt7621_spi_setup(struct spi_device *spi)
++{
++ struct mt7621_spi *rs = spidev_to_mt7621_spi(spi);
++
++ if ((spi->max_speed_hz == 0) ||
++ (spi->max_speed_hz > (rs->sys_freq / 2)))
++ spi->max_speed_hz = (rs->sys_freq / 2);
++
++ if (spi->max_speed_hz < (rs->sys_freq / 4097)) {
++ dev_err(&spi->dev, "setup: requested speed is too low %d Hz\n",
++ spi->max_speed_hz);
++ return -EINVAL;
++ }
++
++ return 0;
++}
++
++static const struct of_device_id mt7621_spi_match[] = {
++ { .compatible = "ralink,mt7621-spi" },
++ {},
++};
++MODULE_DEVICE_TABLE(of, mt7621_spi_match);
++
++static int mt7621_spi_probe(struct platform_device *pdev)
++{
++ const struct of_device_id *match;
++ struct spi_controller *master;
++ struct mt7621_spi *rs;
++ void __iomem *base;
++ struct resource *r;
++ int status = 0;
++ struct clk *clk;
++ int ret;
++
++ match = of_match_device(mt7621_spi_match, &pdev->dev);
++ if (!match)
++ return -EINVAL;
++
++ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ base = devm_ioremap_resource(&pdev->dev, r);
++ if (IS_ERR(base))
++ return PTR_ERR(base);
++
++ clk = devm_clk_get(&pdev->dev, NULL);
++ if (IS_ERR(clk)) {
++ dev_err(&pdev->dev, "unable to get SYS clock, err=%d\n",
++ status);
++ return PTR_ERR(clk);
++ }
++
++ status = clk_prepare_enable(clk);
++ if (status)
++ return status;
++
++ master = spi_alloc_master(&pdev->dev, sizeof(*rs));
++ if (!master) {
++ dev_info(&pdev->dev, "master allocation failed\n");
++ return -ENOMEM;
++ }
++
++ master->mode_bits = SPI_LSB_FIRST;
++ master->flags = SPI_CONTROLLER_HALF_DUPLEX;
++ master->setup = mt7621_spi_setup;
++ master->transfer_one_message = mt7621_spi_transfer_one_message;
++ master->bits_per_word_mask = SPI_BPW_MASK(8);
++ master->dev.of_node = pdev->dev.of_node;
++ master->num_chipselect = 2;
++
++ dev_set_drvdata(&pdev->dev, master);
++
++ rs = spi_controller_get_devdata(master);
++ rs->base = base;
++ rs->clk = clk;
++ rs->master = master;
++ rs->sys_freq = clk_get_rate(rs->clk);
++ rs->pending_write = 0;
++ dev_info(&pdev->dev, "sys_freq: %u\n", rs->sys_freq);
++
++ ret = device_reset(&pdev->dev);
++ if (ret) {
++ dev_err(&pdev->dev, "SPI reset failed!\n");
++ return ret;
++ }
++
++ return devm_spi_register_controller(&pdev->dev, master);
++}
++
++static int mt7621_spi_remove(struct platform_device *pdev)
++{
++ struct spi_controller *master;
++ struct mt7621_spi *rs;
++
++ master = dev_get_drvdata(&pdev->dev);
++ rs = spi_controller_get_devdata(master);
++
++ clk_disable_unprepare(rs->clk);
++
++ return 0;
++}
++
++MODULE_ALIAS("platform:" DRIVER_NAME);
++
++static struct platform_driver mt7621_spi_driver = {
++ .driver = {
++ .name = DRIVER_NAME,
++ .of_match_table = mt7621_spi_match,
++ },
++ .probe = mt7621_spi_probe,
++ .remove = mt7621_spi_remove,
++};
++
++module_platform_driver(mt7621_spi_driver);
++
++MODULE_DESCRIPTION("MT7621 SPI driver");
++MODULE_AUTHOR("Felix Fietkau <nbd@nbd.name>");
++MODULE_LICENSE("GPL");
diff --git a/target/linux/ramips/patches-5.4/0044-i2c-MIPS-adds-ralink-I2C-driver.patch b/target/linux/ramips/patches-5.4/0044-i2c-MIPS-adds-ralink-I2C-driver.patch
new file mode 100644
index 00000000000..4905aba046c
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0044-i2c-MIPS-adds-ralink-I2C-driver.patch
@@ -0,0 +1,507 @@
+From 723b8beaabf3c3c4b1ce69480141f1e926f3f3b2 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 27 Jul 2014 09:52:56 +0100
+Subject: [PATCH 44/53] i2c: MIPS: adds ralink I2C driver
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ .../devicetree/bindings/i2c/i2c-ralink.txt | 27 ++
+ drivers/i2c/busses/Kconfig | 4 +
+ drivers/i2c/busses/Makefile | 1 +
+ drivers/i2c/busses/i2c-ralink.c | 327 ++++++++++++++++++++
+ 4 files changed, 359 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/i2c/i2c-ralink.txt
+ create mode 100644 drivers/i2c/busses/i2c-ralink.c
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/i2c/i2c-ralink.txt
+@@ -0,0 +1,27 @@
++I2C for Ralink platforms
++
++Required properties :
++- compatible : Must be "link,rt3052-i2c"
++- reg: physical base address of the controller and length of memory mapped
++ region.
++- #address-cells = <1>;
++- #size-cells = <0>;
++
++Optional properties:
++- Child nodes conforming to i2c bus binding
++
++Example :
++
++palmbus@10000000 {
++ i2c@900 {
++ compatible = "link,rt3052-i2c";
++ reg = <0x900 0x100>;
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ hwmon@4b {
++ compatible = "national,lm92";
++ reg = <0x4b>;
++ };
++ };
++};
+--- a/drivers/i2c/busses/Kconfig
++++ b/drivers/i2c/busses/Kconfig
+@@ -864,6 +864,11 @@ config I2C_RK3X
+ This driver can also be built as a module. If so, the module will
+ be called i2c-rk3x.
+
++config I2C_RALINK
++ tristate "Ralink I2C Controller"
++ depends on RALINK && !SOC_MT7621
++ select OF_I2C
++
+ config HAVE_S3C2410_I2C
+ bool
+ help
+--- a/drivers/i2c/busses/Makefile
++++ b/drivers/i2c/busses/Makefile
+@@ -84,6 +84,7 @@ obj-$(CONFIG_I2C_PNX) += i2c-pnx.o
+ obj-$(CONFIG_I2C_PUV3) += i2c-puv3.o
+ obj-$(CONFIG_I2C_PXA) += i2c-pxa.o
+ obj-$(CONFIG_I2C_PXA_PCI) += i2c-pxa-pci.o
++obj-$(CONFIG_I2C_RALINK) += i2c-ralink.o
+ obj-$(CONFIG_I2C_QUP) += i2c-qup.o
+ obj-$(CONFIG_I2C_RIIC) += i2c-riic.o
+ obj-$(CONFIG_I2C_RK3X) += i2c-rk3x.o
+--- /dev/null
++++ b/drivers/i2c/busses/i2c-ralink.c
+@@ -0,0 +1,435 @@
++/*
++ * drivers/i2c/busses/i2c-ralink.c
++ *
++ * Copyright (C) 2013 Steven Liu <steven_liu@mediatek.com>
++ * Copyright (C) 2016 Michael Lee <igvtee@gmail.com>
++ *
++ * Improve driver for i2cdetect from i2c-tools to detect i2c devices on the bus.
++ * (C) 2014 Sittisak <sittisaks@hotmail.com>
++ *
++ * This software is licensed under the terms of the GNU General Public
++ * License version 2, as published by the Free Software Foundation, and
++ * may be copied, distributed, and modified under those terms.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ */
++
++#include <linux/interrupt.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/reset.h>
++#include <linux/delay.h>
++#include <linux/slab.h>
++#include <linux/init.h>
++#include <linux/errno.h>
++#include <linux/platform_device.h>
++#include <linux/of_platform.h>
++#include <linux/i2c.h>
++#include <linux/io.h>
++#include <linux/err.h>
++#include <linux/clk.h>
++
++#define REG_CONFIG_REG 0x00
++#define REG_CLKDIV_REG 0x04
++#define REG_DEVADDR_REG 0x08
++#define REG_ADDR_REG 0x0C
++#define REG_DATAOUT_REG 0x10
++#define REG_DATAIN_REG 0x14
++#define REG_STATUS_REG 0x18
++#define REG_STARTXFR_REG 0x1C
++#define REG_BYTECNT_REG 0x20
++
++/* REG_CONFIG_REG */
++#define I2C_ADDRLEN_OFFSET 5
++#define I2C_DEVADLEN_OFFSET 2
++#define I2C_ADDRLEN_MASK 0x3
++#define I2C_ADDR_DIS BIT(1)
++#define I2C_DEVADDR_DIS BIT(0)
++#define I2C_ADDRLEN_8 (7 << I2C_ADDRLEN_OFFSET)
++#define I2C_DEVADLEN_7 (6 << I2C_DEVADLEN_OFFSET)
++#define I2C_CONF_DEFAULT (I2C_ADDRLEN_8 | I2C_DEVADLEN_7)
++
++/* REG_CLKDIV_REG */
++#define I2C_CLKDIV_MASK 0xffff
++
++/* REG_DEVADDR_REG */
++#define I2C_DEVADDR_MASK 0x7f
++
++/* REG_ADDR_REG */
++#define I2C_ADDR_MASK 0xff
++
++/* REG_STATUS_REG */
++#define I2C_STARTERR BIT(4)
++#define I2C_ACKERR BIT(3)
++#define I2C_DATARDY BIT(2)
++#define I2C_SDOEMPTY BIT(1)
++#define I2C_BUSY BIT(0)
++
++/* REG_STARTXFR_REG */
++#define NOSTOP_CMD BIT(2)
++#define NODATA_CMD BIT(1)
++#define READ_CMD BIT(0)
++
++/* REG_BYTECNT_REG */
++#define BYTECNT_MAX 64
++#define SET_BYTECNT(x) (x - 1)
++
++/* timeout waiting for I2C devices to respond (clock streching) */
++#define TIMEOUT_MS 1000
++#define DELAY_INTERVAL_US 100
++
++struct rt_i2c {
++ void __iomem *base;
++ struct clk *clk;
++ struct device *dev;
++ struct i2c_adapter adap;
++ u32 cur_clk;
++ u32 clk_div;
++ u32 flags;
++};
++
++static void rt_i2c_w32(struct rt_i2c *i2c, u32 val, unsigned reg)
++{
++ iowrite32(val, i2c->base + reg);
++}
++
++static u32 rt_i2c_r32(struct rt_i2c *i2c, unsigned reg)
++{
++ return ioread32(i2c->base + reg);
++}
++
++static int poll_down_timeout(void __iomem *addr, u32 mask)
++{
++ unsigned long timeout = jiffies + msecs_to_jiffies(TIMEOUT_MS);
++
++ do {
++ if (!(readl_relaxed(addr) & mask))
++ return 0;
++
++ usleep_range(DELAY_INTERVAL_US, DELAY_INTERVAL_US + 50);
++ } while (time_before(jiffies, timeout));
++
++ return (readl_relaxed(addr) & mask) ? -EAGAIN : 0;
++}
++
++static int rt_i2c_wait_idle(struct rt_i2c *i2c)
++{
++ int ret;
++
++ ret = poll_down_timeout(i2c->base + REG_STATUS_REG, I2C_BUSY);
++ if (ret < 0)
++ dev_dbg(i2c->dev, "idle err(%d)\n", ret);
++
++ return ret;
++}
++
++static int poll_up_timeout(void __iomem *addr, u32 mask)
++{
++ unsigned long timeout = jiffies + msecs_to_jiffies(TIMEOUT_MS);
++ u32 status;
++
++ do {
++ status = readl_relaxed(addr);
++
++ /* check error status */
++ if (status & I2C_STARTERR)
++ return -EAGAIN;
++ else if (status & I2C_ACKERR)
++ return -ENXIO;
++ else if (status & mask)
++ return 0;
++
++ usleep_range(DELAY_INTERVAL_US, DELAY_INTERVAL_US + 50);
++ } while (time_before(jiffies, timeout));
++
++ return -ETIMEDOUT;
++}
++
++static int rt_i2c_wait_rx_done(struct rt_i2c *i2c)
++{
++ int ret;
++
++ ret = poll_up_timeout(i2c->base + REG_STATUS_REG, I2C_DATARDY);
++ if (ret < 0)
++ dev_dbg(i2c->dev, "rx err(%d)\n", ret);
++
++ return ret;
++}
++
++static int rt_i2c_wait_tx_done(struct rt_i2c *i2c)
++{
++ int ret;
++
++ ret = poll_up_timeout(i2c->base + REG_STATUS_REG, I2C_SDOEMPTY);
++ if (ret < 0)
++ dev_dbg(i2c->dev, "tx err(%d)\n", ret);
++
++ return ret;
++}
++
++static void rt_i2c_reset(struct rt_i2c *i2c)
++{
++ device_reset(i2c->adap.dev.parent);
++ barrier();
++ rt_i2c_w32(i2c, i2c->clk_div, REG_CLKDIV_REG);
++}
++
++static void rt_i2c_dump_reg(struct rt_i2c *i2c)
++{
++ dev_dbg(i2c->dev, "conf %08x, clkdiv %08x, devaddr %08x, " \
++ "addr %08x, dataout %08x, datain %08x, " \
++ "status %08x, startxfr %08x, bytecnt %08x\n",
++ rt_i2c_r32(i2c, REG_CONFIG_REG),
++ rt_i2c_r32(i2c, REG_CLKDIV_REG),
++ rt_i2c_r32(i2c, REG_DEVADDR_REG),
++ rt_i2c_r32(i2c, REG_ADDR_REG),
++ rt_i2c_r32(i2c, REG_DATAOUT_REG),
++ rt_i2c_r32(i2c, REG_DATAIN_REG),
++ rt_i2c_r32(i2c, REG_STATUS_REG),
++ rt_i2c_r32(i2c, REG_STARTXFR_REG),
++ rt_i2c_r32(i2c, REG_BYTECNT_REG));
++}
++
++static int rt_i2c_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
++ int num)
++{
++ struct rt_i2c *i2c;
++ struct i2c_msg *pmsg;
++ unsigned char addr;
++ int i, j, ret;
++ u32 cmd;
++
++ i2c = i2c_get_adapdata(adap);
++
++ for (i = 0; i < num; i++) {
++ pmsg = &msgs[i];
++ if (i == (num - 1))
++ cmd = 0;
++ else
++ cmd = NOSTOP_CMD;
++
++ dev_dbg(i2c->dev, "addr: 0x%x, len: %d, flags: 0x%x, stop: %d\n",
++ pmsg->addr, pmsg->len, pmsg->flags,
++ (cmd == 0)? 1 : 0);
++
++ /* wait hardware idle */
++ if ((ret = rt_i2c_wait_idle(i2c)))
++ goto err_timeout;
++
++ if (pmsg->flags & I2C_M_TEN) {
++ rt_i2c_w32(i2c, I2C_CONF_DEFAULT, REG_CONFIG_REG);
++ /* 10 bits address */
++ addr = 0x78 | ((pmsg->addr >> 8) & 0x03);
++ rt_i2c_w32(i2c, addr & I2C_DEVADDR_MASK,
++ REG_DEVADDR_REG);
++ rt_i2c_w32(i2c, pmsg->addr & I2C_ADDR_MASK,
++ REG_ADDR_REG);
++ } else {
++ rt_i2c_w32(i2c, I2C_CONF_DEFAULT | I2C_ADDR_DIS,
++ REG_CONFIG_REG);
++ /* 7 bits address */
++ rt_i2c_w32(i2c, pmsg->addr & I2C_DEVADDR_MASK,
++ REG_DEVADDR_REG);
++ }
++
++ /* buffer length */
++ if (pmsg->len == 0)
++ cmd |= NODATA_CMD;
++ else
++ rt_i2c_w32(i2c, SET_BYTECNT(pmsg->len),
++ REG_BYTECNT_REG);
++
++ j = 0;
++ if (pmsg->flags & I2C_M_RD) {
++ cmd |= READ_CMD;
++ /* start transfer */
++ barrier();
++ rt_i2c_w32(i2c, cmd, REG_STARTXFR_REG);
++ do {
++ /* wait */
++ if ((ret = rt_i2c_wait_rx_done(i2c)))
++ goto err_timeout;
++ /* read data */
++ if (pmsg->len)
++ pmsg->buf[j] = rt_i2c_r32(i2c,
++ REG_DATAIN_REG);
++ j++;
++ } while (j < pmsg->len);
++ } else {
++ do {
++ /* write data */
++ if (pmsg->len)
++ rt_i2c_w32(i2c, pmsg->buf[j],
++ REG_DATAOUT_REG);
++ /* start transfer */
++ if (j == 0) {
++ barrier();
++ rt_i2c_w32(i2c, cmd, REG_STARTXFR_REG);
++ }
++ /* wait */
++ if ((ret = rt_i2c_wait_tx_done(i2c)))
++ goto err_timeout;
++ j++;
++ } while (j < pmsg->len);
++ }
++ }
++ /* the return value is number of executed messages */
++ ret = i;
++
++ return ret;
++
++err_timeout:
++ rt_i2c_dump_reg(i2c);
++ rt_i2c_reset(i2c);
++ return ret;
++}
++
++static u32 rt_i2c_func(struct i2c_adapter *a)
++{
++ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
++}
++
++static const struct i2c_algorithm rt_i2c_algo = {
++ .master_xfer = rt_i2c_master_xfer,
++ .functionality = rt_i2c_func,
++};
++
++static const struct of_device_id i2c_rt_dt_ids[] = {
++ { .compatible = "ralink,rt2880-i2c" },
++ { /* sentinel */ }
++};
++
++MODULE_DEVICE_TABLE(of, i2c_rt_dt_ids);
++
++static struct i2c_adapter_quirks rt_i2c_quirks = {
++ .max_write_len = BYTECNT_MAX,
++ .max_read_len = BYTECNT_MAX,
++};
++
++static int rt_i2c_init(struct rt_i2c *i2c)
++{
++ u32 reg;
++
++ /* i2c_sclk = periph_clk / ((2 * clk_div) + 5) */
++ i2c->clk_div = (clk_get_rate(i2c->clk) - (5 * i2c->cur_clk)) /
++ (2 * i2c->cur_clk);
++ if (i2c->clk_div < 8)
++ i2c->clk_div = 8;
++ if (i2c->clk_div > I2C_CLKDIV_MASK)
++ i2c->clk_div = I2C_CLKDIV_MASK;
++
++ /* check support combinde/repeated start message */
++ rt_i2c_w32(i2c, NOSTOP_CMD, REG_STARTXFR_REG);
++ reg = rt_i2c_r32(i2c, REG_STARTXFR_REG) & NOSTOP_CMD;
++
++ rt_i2c_reset(i2c);
++
++ return reg;
++}
++
++static int rt_i2c_probe(struct platform_device *pdev)
++{
++ struct resource *res;
++ struct rt_i2c *i2c;
++ struct i2c_adapter *adap;
++ const struct of_device_id *match;
++ int ret, restart;
++
++ match = of_match_device(i2c_rt_dt_ids, &pdev->dev);
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ if (!res) {
++ dev_err(&pdev->dev, "no memory resource found\n");
++ return -ENODEV;
++ }
++
++ i2c = devm_kzalloc(&pdev->dev, sizeof(struct rt_i2c), GFP_KERNEL);
++ if (!i2c) {
++ dev_err(&pdev->dev, "failed to allocate i2c_adapter\n");
++ return -ENOMEM;
++ }
++
++ i2c->base = devm_ioremap_resource(&pdev->dev, res);
++ if (IS_ERR(i2c->base))
++ return PTR_ERR(i2c->base);
++
++ i2c->clk = devm_clk_get(&pdev->dev, NULL);
++ if (IS_ERR(i2c->clk)) {
++ dev_err(&pdev->dev, "no clock defined\n");
++ return -ENODEV;
++ }
++ clk_prepare_enable(i2c->clk);
++ i2c->dev = &pdev->dev;
++
++ if (of_property_read_u32(pdev->dev.of_node,
++ "clock-frequency", &i2c->cur_clk))
++ i2c->cur_clk = 100000;
++
++ adap = &i2c->adap;
++ adap->owner = THIS_MODULE;
++ adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
++ adap->algo = &rt_i2c_algo;
++ adap->retries = 3;
++ adap->dev.parent = &pdev->dev;
++ i2c_set_adapdata(adap, i2c);
++ adap->dev.of_node = pdev->dev.of_node;
++ strlcpy(adap->name, dev_name(&pdev->dev), sizeof(adap->name));
++ adap->quirks = &rt_i2c_quirks;
++
++ platform_set_drvdata(pdev, i2c);
++
++ restart = rt_i2c_init(i2c);
++
++ ret = i2c_add_adapter(adap);
++ if (ret < 0) {
++ dev_err(&pdev->dev, "failed to add adapter\n");
++ clk_disable_unprepare(i2c->clk);
++ return ret;
++ }
++
++ dev_info(&pdev->dev, "clock %uKHz, re-start %ssupport\n",
++ i2c->cur_clk/1000, restart ? "" : "not ");
++
++ return ret;
++}
++
++static int rt_i2c_remove(struct platform_device *pdev)
++{
++ struct rt_i2c *i2c = platform_get_drvdata(pdev);
++
++ i2c_del_adapter(&i2c->adap);
++ clk_disable_unprepare(i2c->clk);
++
++ return 0;
++}
++
++static struct platform_driver rt_i2c_driver = {
++ .probe = rt_i2c_probe,
++ .remove = rt_i2c_remove,
++ .driver = {
++ .owner = THIS_MODULE,
++ .name = "i2c-ralink",
++ .of_match_table = i2c_rt_dt_ids,
++ },
++};
++
++static int __init i2c_rt_init (void)
++{
++ return platform_driver_register(&rt_i2c_driver);
++}
++subsys_initcall(i2c_rt_init);
++
++static void __exit i2c_rt_exit (void)
++{
++ platform_driver_unregister(&rt_i2c_driver);
++}
++module_exit(i2c_rt_exit);
++
++MODULE_AUTHOR("Steven Liu <steven_liu@mediatek.com>");
++MODULE_DESCRIPTION("Ralink I2c host driver");
++MODULE_LICENSE("GPL");
++MODULE_ALIAS("platform:Ralink-I2C");
diff --git a/target/linux/ramips/patches-5.4/0045-i2c-add-mt7621-driver.patch b/target/linux/ramips/patches-5.4/0045-i2c-add-mt7621-driver.patch
new file mode 100644
index 00000000000..a848085520f
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0045-i2c-add-mt7621-driver.patch
@@ -0,0 +1,473 @@
+From d5c54ff3d1db0a4348fa04d8e78f3bf6063e3afc Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Mon, 7 Dec 2015 17:21:27 +0100
+Subject: [PATCH 45/53] i2c: add mt7621 driver
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/i2c/busses/Kconfig | 4 +
+ drivers/i2c/busses/Makefile | 1 +
+ drivers/i2c/busses/i2c-mt7621.c | 303 +++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 308 insertions(+)
+ create mode 100644 drivers/i2c/busses/i2c-mt7621.c
+
+--- a/drivers/i2c/busses/Kconfig
++++ b/drivers/i2c/busses/Kconfig
+@@ -869,6 +869,11 @@ config I2C_RALINK
+ depends on RALINK && !SOC_MT7621
+ select OF_I2C
+
++config I2C_MT7621
++ tristate "MT7621/MT7628 I2C Controller"
++ depends on RALINK && (SOC_MT7620 || SOC_MT7621)
++ select OF_I2C
++
+ config HAVE_S3C2410_I2C
+ bool
+ help
+--- a/drivers/i2c/busses/Makefile
++++ b/drivers/i2c/busses/Makefile
+@@ -85,6 +85,7 @@ obj-$(CONFIG_I2C_PUV3) += i2c-puv3.o
+ obj-$(CONFIG_I2C_PXA) += i2c-pxa.o
+ obj-$(CONFIG_I2C_PXA_PCI) += i2c-pxa-pci.o
+ obj-$(CONFIG_I2C_RALINK) += i2c-ralink.o
++obj-$(CONFIG_I2C_MT7621) += i2c-mt7621.o
+ obj-$(CONFIG_I2C_QUP) += i2c-qup.o
+ obj-$(CONFIG_I2C_RIIC) += i2c-riic.o
+ obj-$(CONFIG_I2C_RK3X) += i2c-rk3x.o
+--- /dev/null
++++ b/drivers/i2c/busses/i2c-mt7621.c
+@@ -0,0 +1,433 @@
++/*
++ * drivers/i2c/busses/i2c-mt7621.c
++ *
++ * Copyright (C) 2013 Steven Liu <steven_liu@mediatek.com>
++ * Copyright (C) 2016 Michael Lee <igvtee@gmail.com>
++ *
++ * Improve driver for i2cdetect from i2c-tools to detect i2c devices on the bus.
++ * (C) 2014 Sittisak <sittisaks@hotmail.com>
++ *
++ * This software is licensed under the terms of the GNU General Public
++ * License version 2, as published by the Free Software Foundation, and
++ * may be copied, distributed, and modified under those terms.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ */
++
++#include <linux/interrupt.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/reset.h>
++#include <linux/delay.h>
++#include <linux/slab.h>
++#include <linux/init.h>
++#include <linux/errno.h>
++#include <linux/platform_device.h>
++#include <linux/of_platform.h>
++#include <linux/i2c.h>
++#include <linux/io.h>
++#include <linux/err.h>
++#include <linux/clk.h>
++
++#define REG_SM0CFG0 0x08
++#define REG_SM0DOUT 0x10
++#define REG_SM0DIN 0x14
++#define REG_SM0ST 0x18
++#define REG_SM0AUTO 0x1C
++#define REG_SM0CFG1 0x20
++#define REG_SM0CFG2 0x28
++#define REG_SM0CTL0 0x40
++#define REG_SM0CTL1 0x44
++#define REG_SM0D0 0x50
++#define REG_SM0D1 0x54
++#define REG_PINTEN 0x5C
++#define REG_PINTST 0x60
++#define REG_PINTCL 0x64
++
++/* REG_SM0CFG0 */
++#define I2C_DEVADDR_MASK 0x7f
++
++/* REG_SM0ST */
++#define I2C_DATARDY BIT(2)
++#define I2C_SDOEMPTY BIT(1)
++#define I2C_BUSY BIT(0)
++
++/* REG_SM0AUTO */
++#define READ_CMD BIT(0)
++
++/* REG_SM0CFG1 */
++#define BYTECNT_MAX 64
++#define SET_BYTECNT(x) (x - 1)
++
++/* REG_SM0CFG2 */
++#define AUTOMODE_EN BIT(0)
++
++/* REG_SM0CTL0 */
++#define ODRAIN_HIGH_SM0 BIT(31)
++#define VSYNC_SHIFT 28
++#define VSYNC_MASK 0x3
++#define VSYNC_PULSE (0x1 << VSYNC_SHIFT)
++#define VSYNC_RISING (0x2 << VSYNC_SHIFT)
++#define CLK_DIV_SHIFT 16
++#define CLK_DIV_MASK 0xfff
++#define DEG_CNT_SHIFT 8
++#define DEG_CNT_MASK 0xff
++#define WAIT_HIGH BIT(6)
++#define DEG_EN BIT(5)
++#define CS_STATUA BIT(4)
++#define SCL_STATUS BIT(3)
++#define SDA_STATUS BIT(2)
++#define SM0_EN BIT(1)
++#define SCL_STRECH BIT(0)
++
++/* REG_SM0CTL1 */
++#define ACK_SHIFT 16
++#define ACK_MASK 0xff
++#define PGLEN_SHIFT 8
++#define PGLEN_MASK 0x7
++#define SM0_MODE_SHIFT 4
++#define SM0_MODE_MASK 0x7
++#define SM0_MODE_START 0x1
++#define SM0_MODE_WRITE 0x2
++#define SM0_MODE_STOP 0x3
++#define SM0_MODE_READ_NACK 0x4
++#define SM0_MODE_READ_ACK 0x5
++#define SM0_TRI_BUSY BIT(0)
++
++/* timeout waiting for I2C devices to respond (clock streching) */
++#define TIMEOUT_MS 1000
++#define DELAY_INTERVAL_US 100
++
++struct mtk_i2c {
++ void __iomem *base;
++ struct clk *clk;
++ struct device *dev;
++ struct i2c_adapter adap;
++ u32 cur_clk;
++ u32 clk_div;
++ u32 flags;
++};
++
++static void mtk_i2c_w32(struct mtk_i2c *i2c, u32 val, unsigned reg)
++{
++ iowrite32(val, i2c->base + reg);
++}
++
++static u32 mtk_i2c_r32(struct mtk_i2c *i2c, unsigned reg)
++{
++ return ioread32(i2c->base + reg);
++}
++
++static int poll_down_timeout(void __iomem *addr, u32 mask)
++{
++ unsigned long timeout = jiffies + msecs_to_jiffies(TIMEOUT_MS);
++
++ do {
++ if (!(readl_relaxed(addr) & mask))
++ return 0;
++
++ usleep_range(DELAY_INTERVAL_US, DELAY_INTERVAL_US + 50);
++ } while (time_before(jiffies, timeout));
++
++ return (readl_relaxed(addr) & mask) ? -EAGAIN : 0;
++}
++
++static int mtk_i2c_wait_idle(struct mtk_i2c *i2c)
++{
++ int ret;
++
++ ret = poll_down_timeout(i2c->base + REG_SM0ST, I2C_BUSY);
++ if (ret < 0)
++ dev_dbg(i2c->dev, "idle err(%d)\n", ret);
++
++ return ret;
++}
++
++static int poll_up_timeout(void __iomem *addr, u32 mask)
++{
++ unsigned long timeout = jiffies + msecs_to_jiffies(TIMEOUT_MS);
++ u32 status;
++
++ do {
++ status = readl_relaxed(addr);
++ if (status & mask)
++ return 0;
++ usleep_range(DELAY_INTERVAL_US, DELAY_INTERVAL_US + 50);
++ } while (time_before(jiffies, timeout));
++
++ return -ETIMEDOUT;
++}
++
++static int mtk_i2c_wait_rx_done(struct mtk_i2c *i2c)
++{
++ int ret;
++
++ ret = poll_up_timeout(i2c->base + REG_SM0ST, I2C_DATARDY);
++ if (ret < 0)
++ dev_dbg(i2c->dev, "rx err(%d)\n", ret);
++
++ return ret;
++}
++
++static int mtk_i2c_wait_tx_done(struct mtk_i2c *i2c)
++{
++ int ret;
++
++ ret = poll_up_timeout(i2c->base + REG_SM0ST, I2C_SDOEMPTY);
++ if (ret < 0)
++ dev_dbg(i2c->dev, "tx err(%d)\n", ret);
++
++ return ret;
++}
++
++static void mtk_i2c_reset(struct mtk_i2c *i2c)
++{
++ u32 reg;
++ device_reset(i2c->adap.dev.parent);
++ barrier();
++
++ /* ctrl0 */
++ reg = ODRAIN_HIGH_SM0 | VSYNC_PULSE | (i2c->clk_div << CLK_DIV_SHIFT) |
++ WAIT_HIGH | SM0_EN;
++ mtk_i2c_w32(i2c, reg, REG_SM0CTL0);
++
++ /* auto mode */
++ mtk_i2c_w32(i2c, AUTOMODE_EN, REG_SM0CFG2);
++}
++
++static void mtk_i2c_dump_reg(struct mtk_i2c *i2c)
++{
++ dev_dbg(i2c->dev, "cfg0 %08x, dout %08x, din %08x, " \
++ "status %08x, auto %08x, cfg1 %08x, " \
++ "cfg2 %08x, ctl0 %08x, ctl1 %08x\n",
++ mtk_i2c_r32(i2c, REG_SM0CFG0),
++ mtk_i2c_r32(i2c, REG_SM0DOUT),
++ mtk_i2c_r32(i2c, REG_SM0DIN),
++ mtk_i2c_r32(i2c, REG_SM0ST),
++ mtk_i2c_r32(i2c, REG_SM0AUTO),
++ mtk_i2c_r32(i2c, REG_SM0CFG1),
++ mtk_i2c_r32(i2c, REG_SM0CFG2),
++ mtk_i2c_r32(i2c, REG_SM0CTL0),
++ mtk_i2c_r32(i2c, REG_SM0CTL1));
++}
++
++static int mtk_i2c_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
++ int num)
++{
++ struct mtk_i2c *i2c;
++ struct i2c_msg *pmsg;
++ int i, j, ret;
++ u32 cmd;
++
++ i2c = i2c_get_adapdata(adap);
++
++ for (i = 0; i < num; i++) {
++ pmsg = &msgs[i];
++ cmd = 0;
++
++ dev_dbg(i2c->dev, "addr: 0x%x, len: %d, flags: 0x%x\n",
++ pmsg->addr, pmsg->len, pmsg->flags);
++
++ /* wait hardware idle */
++ if ((ret = mtk_i2c_wait_idle(i2c)))
++ goto err_timeout;
++
++ if (pmsg->flags & I2C_M_TEN) {
++ dev_dbg(i2c->dev, "10 bits addr not supported\n");
++ return -EINVAL;
++ } else {
++ /* 7 bits address */
++ mtk_i2c_w32(i2c, pmsg->addr & I2C_DEVADDR_MASK,
++ REG_SM0CFG0);
++ }
++
++ /* buffer length */
++ if (pmsg->len == 0) {
++ dev_dbg(i2c->dev, "length is 0\n");
++ return -EINVAL;
++ } else
++ mtk_i2c_w32(i2c, SET_BYTECNT(pmsg->len),
++ REG_SM0CFG1);
++
++ j = 0;
++ if (pmsg->flags & I2C_M_RD) {
++ cmd |= READ_CMD;
++ /* start transfer */
++ barrier();
++ mtk_i2c_w32(i2c, cmd, REG_SM0AUTO);
++ do {
++ /* wait */
++ if ((ret = mtk_i2c_wait_rx_done(i2c)))
++ goto err_timeout;
++ /* read data */
++ if (pmsg->len)
++ pmsg->buf[j] = mtk_i2c_r32(i2c,
++ REG_SM0DIN);
++ j++;
++ } while (j < pmsg->len);
++ } else {
++ do {
++ /* write data */
++ if (pmsg->len)
++ mtk_i2c_w32(i2c, pmsg->buf[j],
++ REG_SM0DOUT);
++ /* start transfer */
++ if (j == 0) {
++ barrier();
++ mtk_i2c_w32(i2c, cmd, REG_SM0AUTO);
++ }
++ /* wait */
++ if ((ret = mtk_i2c_wait_tx_done(i2c)))
++ goto err_timeout;
++ j++;
++ } while (j < pmsg->len);
++ }
++ }
++ /* the return value is number of executed messages */
++ ret = i;
++
++ return ret;
++
++err_timeout:
++ mtk_i2c_dump_reg(i2c);
++ mtk_i2c_reset(i2c);
++ return ret;
++}
++
++static u32 mtk_i2c_func(struct i2c_adapter *a)
++{
++ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
++}
++
++static const struct i2c_algorithm mtk_i2c_algo = {
++ .master_xfer = mtk_i2c_master_xfer,
++ .functionality = mtk_i2c_func,
++};
++
++static const struct of_device_id i2c_mtk_dt_ids[] = {
++ { .compatible = "mediatek,mt7621-i2c" },
++ { /* sentinel */ }
++};
++
++MODULE_DEVICE_TABLE(of, i2c_mtk_dt_ids);
++
++static struct i2c_adapter_quirks mtk_i2c_quirks = {
++ .max_write_len = BYTECNT_MAX,
++ .max_read_len = BYTECNT_MAX,
++};
++
++static void mtk_i2c_init(struct mtk_i2c *i2c)
++{
++ i2c->clk_div = clk_get_rate(i2c->clk) / i2c->cur_clk;
++ if (i2c->clk_div > CLK_DIV_MASK)
++ i2c->clk_div = CLK_DIV_MASK;
++
++ mtk_i2c_reset(i2c);
++}
++
++static int mtk_i2c_probe(struct platform_device *pdev)
++{
++ struct resource *res;
++ struct mtk_i2c *i2c;
++ struct i2c_adapter *adap;
++ const struct of_device_id *match;
++ int ret;
++
++ match = of_match_device(i2c_mtk_dt_ids, &pdev->dev);
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ if (!res) {
++ dev_err(&pdev->dev, "no memory resource found\n");
++ return -ENODEV;
++ }
++
++ i2c = devm_kzalloc(&pdev->dev, sizeof(struct mtk_i2c), GFP_KERNEL);
++ if (!i2c) {
++ dev_err(&pdev->dev, "failed to allocate i2c_adapter\n");
++ return -ENOMEM;
++ }
++
++ i2c->base = devm_ioremap_resource(&pdev->dev, res);
++ if (IS_ERR(i2c->base))
++ return PTR_ERR(i2c->base);
++
++ i2c->clk = devm_clk_get(&pdev->dev, NULL);
++ if (IS_ERR(i2c->clk)) {
++ dev_err(&pdev->dev, "no clock defined\n");
++ return -ENODEV;
++ }
++ clk_prepare_enable(i2c->clk);
++ i2c->dev = &pdev->dev;
++
++ if (of_property_read_u32(pdev->dev.of_node,
++ "clock-frequency", &i2c->cur_clk))
++ i2c->cur_clk = 100000;
++
++ adap = &i2c->adap;
++ adap->owner = THIS_MODULE;
++ adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
++ adap->algo = &mtk_i2c_algo;
++ adap->retries = 3;
++ adap->dev.parent = &pdev->dev;
++ i2c_set_adapdata(adap, i2c);
++ adap->dev.of_node = pdev->dev.of_node;
++ strlcpy(adap->name, dev_name(&pdev->dev), sizeof(adap->name));
++ adap->quirks = &mtk_i2c_quirks;
++
++ platform_set_drvdata(pdev, i2c);
++
++ mtk_i2c_init(i2c);
++
++ ret = i2c_add_adapter(adap);
++ if (ret < 0) {
++ dev_err(&pdev->dev, "failed to add adapter\n");
++ clk_disable_unprepare(i2c->clk);
++ return ret;
++ }
++
++ dev_info(&pdev->dev, "clock %uKHz, re-start not support\n",
++ i2c->cur_clk/1000);
++
++ return ret;
++}
++
++static int mtk_i2c_remove(struct platform_device *pdev)
++{
++ struct mtk_i2c *i2c = platform_get_drvdata(pdev);
++
++ i2c_del_adapter(&i2c->adap);
++ clk_disable_unprepare(i2c->clk);
++
++ return 0;
++}
++
++static struct platform_driver mtk_i2c_driver = {
++ .probe = mtk_i2c_probe,
++ .remove = mtk_i2c_remove,
++ .driver = {
++ .owner = THIS_MODULE,
++ .name = "i2c-mt7621",
++ .of_match_table = i2c_mtk_dt_ids,
++ },
++};
++
++static int __init i2c_mtk_init (void)
++{
++ return platform_driver_register(&mtk_i2c_driver);
++}
++subsys_initcall(i2c_mtk_init);
++
++static void __exit i2c_mtk_exit (void)
++{
++ platform_driver_unregister(&mtk_i2c_driver);
++}
++module_exit(i2c_mtk_exit);
++
++MODULE_AUTHOR("Steven Liu <steven_liu@mediatek.com>");
++MODULE_DESCRIPTION("MT7621 I2c host driver");
++MODULE_LICENSE("GPL");
++MODULE_ALIAS("platform:MT7621-I2C");
diff --git a/target/linux/ramips/patches-5.4/0046-mmc-MIPS-ralink-add-sdhci-for-mt7620a-SoC.patch b/target/linux/ramips/patches-5.4/0046-mmc-MIPS-ralink-add-sdhci-for-mt7620a-SoC.patch
new file mode 100644
index 00000000000..0535811ea31
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0046-mmc-MIPS-ralink-add-sdhci-for-mt7620a-SoC.patch
@@ -0,0 +1,43 @@
+From 23147af14531cbdada194b94120ef8774f46292d Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Thu, 13 Nov 2014 19:08:40 +0100
+Subject: [PATCH 46/53] mmc: MIPS: ralink: add sdhci for mt7620a SoC
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/mmc/host/Kconfig | 2 +
+ drivers/mmc/host/Makefile | 1 +
+ drivers/mmc/host/mtk-mmc/Kconfig | 16 +
+ drivers/mmc/host/mtk-mmc/Makefile | 42 +
+ drivers/mmc/host/mtk-mmc/board.h | 137 ++
+ drivers/mmc/host/mtk-mmc/dbg.c | 347 ++++
+ drivers/mmc/host/mtk-mmc/dbg.h | 156 ++
+ drivers/mmc/host/mtk-mmc/mt6575_sd.h | 1001 +++++++++++
+ drivers/mmc/host/mtk-mmc/sd.c | 3060 ++++++++++++++++++++++++++++++++++
+ 9 files changed, 4762 insertions(+)
+ create mode 100644 drivers/mmc/host/mtk-mmc/Kconfig
+ create mode 100644 drivers/mmc/host/mtk-mmc/Makefile
+ create mode 100644 drivers/mmc/host/mtk-mmc/board.h
+ create mode 100644 drivers/mmc/host/mtk-mmc/dbg.c
+ create mode 100644 drivers/mmc/host/mtk-mmc/dbg.h
+ create mode 100644 drivers/mmc/host/mtk-mmc/mt6575_sd.h
+ create mode 100644 drivers/mmc/host/mtk-mmc/sd.c
+
+--- a/drivers/mmc/host/Kconfig
++++ b/drivers/mmc/host/Kconfig
+@@ -901,3 +901,5 @@ config MMC_SDHCI_XENON
+ This selects Marvell Xenon eMMC/SD/SDIO SDHCI.
+ If you have a controller with this interface, say Y or M here.
+ If unsure, say N.
++
++source "drivers/mmc/host/mtk-mmc/Kconfig"
+--- a/drivers/mmc/host/Makefile
++++ b/drivers/mmc/host/Makefile
+@@ -3,6 +3,7 @@
+ # Makefile for MMC/SD host controller drivers
+ #
+
++obj-$(CONFIG_MTK_MMC) += mtk-mmc/
+ obj-$(CONFIG_MMC_ARMMMCI) += armmmci.o
+ armmmci-y := mmci.o
+ armmmci-$(CONFIG_MMC_QCOM_DML) += mmci_qcom_dml.o
diff --git a/target/linux/ramips/patches-5.4/0047-DMA-ralink-add-rt2880-dma-engine.patch b/target/linux/ramips/patches-5.4/0047-DMA-ralink-add-rt2880-dma-engine.patch
new file mode 100644
index 00000000000..b74a48a2209
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0047-DMA-ralink-add-rt2880-dma-engine.patch
@@ -0,0 +1,1757 @@
+From f1c4d9e622c800e1f38b3818f933ec7597d1ccfb Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 27 Jul 2014 09:29:51 +0100
+Subject: [PATCH 47/53] DMA: ralink: add rt2880 dma engine
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/dma/Kconfig | 6 +
+ drivers/dma/Makefile | 1 +
+ drivers/dma/ralink-gdma.c | 577 +++++++++++++++++++++++++++++++++++++++++++++
+ include/linux/dmaengine.h | 1 +
+ 4 files changed, 585 insertions(+)
+ create mode 100644 drivers/dma/ralink-gdma.c
+
+--- a/drivers/dma/Kconfig
++++ b/drivers/dma/Kconfig
+@@ -40,6 +40,18 @@ config ASYNC_TX_ENABLE_CHANNEL_SWITCH
+ config ARCH_HAS_ASYNC_TX_FIND_CHANNEL
+ bool
+
++config DMA_RALINK
++ tristate "RALINK DMA support"
++ depends on RALINK && !SOC_RT288X
++ select DMA_ENGINE
++ select DMA_VIRTUAL_CHANNELS
++
++config MTK_HSDMA
++ tristate "MTK HSDMA support"
++ depends on RALINK && SOC_MT7621
++ select DMA_ENGINE
++ select DMA_VIRTUAL_CHANNELS
++
+ config DMA_ENGINE
+ bool
+
+--- a/drivers/dma/Makefile
++++ b/drivers/dma/Makefile
+@@ -71,6 +71,8 @@ obj-$(CONFIG_TI_EDMA) += edma.o
+ obj-$(CONFIG_XGENE_DMA) += xgene-dma.o
+ obj-$(CONFIG_ZX_DMA) += zx_dma.o
+ obj-$(CONFIG_ST_FDMA) += st_fdma.o
++obj-$(CONFIG_DMA_RALINK) += ralink-gdma.o
++obj-$(CONFIG_MTK_HSDMA) += mtk-hsdma.o
+
+ obj-y += qcom/
+ obj-y += xilinx/
+--- /dev/null
++++ b/drivers/dma/ralink-gdma.c
+@@ -0,0 +1,928 @@
++/*
++ * Copyright (C) 2013, Lars-Peter Clausen <lars@metafoo.de>
++ * GDMA4740 DMAC support
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License as published by the
++ * Free Software Foundation; either version 2 of the License, or (at your
++ * option) any later version.
++ *
++ */
++
++#include <linux/dmaengine.h>
++#include <linux/dma-mapping.h>
++#include <linux/err.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/slab.h>
++#include <linux/spinlock.h>
++#include <linux/irq.h>
++#include <linux/of_dma.h>
++#include <linux/reset.h>
++#include <linux/of_device.h>
++
++#include "virt-dma.h"
++
++#define GDMA_REG_SRC_ADDR(x) (0x00 + (x) * 0x10)
++#define GDMA_REG_DST_ADDR(x) (0x04 + (x) * 0x10)
++
++#define GDMA_REG_CTRL0(x) (0x08 + (x) * 0x10)
++#define GDMA_REG_CTRL0_TX_MASK 0xffff
++#define GDMA_REG_CTRL0_TX_SHIFT 16
++#define GDMA_REG_CTRL0_CURR_MASK 0xff
++#define GDMA_REG_CTRL0_CURR_SHIFT 8
++#define GDMA_REG_CTRL0_SRC_ADDR_FIXED BIT(7)
++#define GDMA_REG_CTRL0_DST_ADDR_FIXED BIT(6)
++#define GDMA_REG_CTRL0_BURST_MASK 0x7
++#define GDMA_REG_CTRL0_BURST_SHIFT 3
++#define GDMA_REG_CTRL0_DONE_INT BIT(2)
++#define GDMA_REG_CTRL0_ENABLE BIT(1)
++#define GDMA_REG_CTRL0_SW_MODE BIT(0)
++
++#define GDMA_REG_CTRL1(x) (0x0c + (x) * 0x10)
++#define GDMA_REG_CTRL1_SEG_MASK 0xf
++#define GDMA_REG_CTRL1_SEG_SHIFT 22
++#define GDMA_REG_CTRL1_REQ_MASK 0x3f
++#define GDMA_REG_CTRL1_SRC_REQ_SHIFT 16
++#define GDMA_REG_CTRL1_DST_REQ_SHIFT 8
++#define GDMA_REG_CTRL1_CONTINOUS BIT(14)
++#define GDMA_REG_CTRL1_NEXT_MASK 0x1f
++#define GDMA_REG_CTRL1_NEXT_SHIFT 3
++#define GDMA_REG_CTRL1_COHERENT BIT(2)
++#define GDMA_REG_CTRL1_FAIL BIT(1)
++#define GDMA_REG_CTRL1_MASK BIT(0)
++
++#define GDMA_REG_UNMASK_INT 0x200
++#define GDMA_REG_DONE_INT 0x204
++
++#define GDMA_REG_GCT 0x220
++#define GDMA_REG_GCT_CHAN_MASK 0x3
++#define GDMA_REG_GCT_CHAN_SHIFT 3
++#define GDMA_REG_GCT_VER_MASK 0x3
++#define GDMA_REG_GCT_VER_SHIFT 1
++#define GDMA_REG_GCT_ARBIT_RR BIT(0)
++
++#define GDMA_REG_REQSTS 0x2a0
++#define GDMA_REG_ACKSTS 0x2a4
++#define GDMA_REG_FINSTS 0x2a8
++
++/* for RT305X gdma registers */
++#define GDMA_RT305X_CTRL0_REQ_MASK 0xf
++#define GDMA_RT305X_CTRL0_SRC_REQ_SHIFT 12
++#define GDMA_RT305X_CTRL0_DST_REQ_SHIFT 8
++
++#define GDMA_RT305X_CTRL1_FAIL BIT(4)
++#define GDMA_RT305X_CTRL1_NEXT_MASK 0x7
++#define GDMA_RT305X_CTRL1_NEXT_SHIFT 1
++
++#define GDMA_RT305X_STATUS_INT 0x80
++#define GDMA_RT305X_STATUS_SIGNAL 0x84
++#define GDMA_RT305X_GCT 0x88
++
++/* for MT7621 gdma registers */
++#define GDMA_REG_PERF_START(x) (0x230 + (x) * 0x8)
++#define GDMA_REG_PERF_END(x) (0x234 + (x) * 0x8)
++
++enum gdma_dma_transfer_size {
++ GDMA_TRANSFER_SIZE_4BYTE = 0,
++ GDMA_TRANSFER_SIZE_8BYTE = 1,
++ GDMA_TRANSFER_SIZE_16BYTE = 2,
++ GDMA_TRANSFER_SIZE_32BYTE = 3,
++ GDMA_TRANSFER_SIZE_64BYTE = 4,
++};
++
++struct gdma_dma_sg {
++ dma_addr_t src_addr;
++ dma_addr_t dst_addr;
++ u32 len;
++};
++
++struct gdma_dma_desc {
++ struct virt_dma_desc vdesc;
++
++ enum dma_transfer_direction direction;
++ bool cyclic;
++
++ u32 residue;
++ unsigned int num_sgs;
++ struct gdma_dma_sg sg[];
++};
++
++struct gdma_dmaengine_chan {
++ struct virt_dma_chan vchan;
++ unsigned int id;
++ unsigned int slave_id;
++
++ dma_addr_t fifo_addr;
++ enum gdma_dma_transfer_size burst_size;
++
++ struct gdma_dma_desc *desc;
++ unsigned int next_sg;
++};
++
++struct gdma_dma_dev {
++ struct dma_device ddev;
++ struct device_dma_parameters dma_parms;
++ struct gdma_data *data;
++ void __iomem *base;
++ struct tasklet_struct task;
++ volatile unsigned long chan_issued;
++ atomic_t cnt;
++
++ struct gdma_dmaengine_chan chan[];
++};
++
++struct gdma_data
++{
++ int chancnt;
++ u32 done_int_reg;
++ void (*init)(struct gdma_dma_dev *dma_dev);
++ int (*start_transfer)(struct gdma_dmaengine_chan *chan);
++};
++
++static struct gdma_dma_dev *gdma_dma_chan_get_dev(
++ struct gdma_dmaengine_chan *chan)
++{
++ return container_of(chan->vchan.chan.device, struct gdma_dma_dev,
++ ddev);
++}
++
++static struct gdma_dmaengine_chan *to_gdma_dma_chan(struct dma_chan *c)
++{
++ return container_of(c, struct gdma_dmaengine_chan, vchan.chan);
++}
++
++static struct gdma_dma_desc *to_gdma_dma_desc(struct virt_dma_desc *vdesc)
++{
++ return container_of(vdesc, struct gdma_dma_desc, vdesc);
++}
++
++static inline uint32_t gdma_dma_read(struct gdma_dma_dev *dma_dev,
++ unsigned int reg)
++{
++ return readl(dma_dev->base + reg);
++}
++
++static inline void gdma_dma_write(struct gdma_dma_dev *dma_dev,
++ unsigned reg, uint32_t val)
++{
++ writel(val, dma_dev->base + reg);
++}
++
++static struct gdma_dma_desc *gdma_dma_alloc_desc(unsigned int num_sgs)
++{
++ return kzalloc(sizeof(struct gdma_dma_desc) +
++ sizeof(struct gdma_dma_sg) * num_sgs, GFP_ATOMIC);
++}
++
++static enum gdma_dma_transfer_size gdma_dma_maxburst(u32 maxburst)
++{
++ if (maxburst < 2)
++ return GDMA_TRANSFER_SIZE_4BYTE;
++ else if (maxburst < 4)
++ return GDMA_TRANSFER_SIZE_8BYTE;
++ else if (maxburst < 8)
++ return GDMA_TRANSFER_SIZE_16BYTE;
++ else if (maxburst < 16)
++ return GDMA_TRANSFER_SIZE_32BYTE;
++ else
++ return GDMA_TRANSFER_SIZE_64BYTE;
++}
++
++static int gdma_dma_config(struct dma_chan *c,
++ struct dma_slave_config *config)
++{
++ struct gdma_dmaengine_chan *chan = to_gdma_dma_chan(c);
++ struct gdma_dma_dev *dma_dev = gdma_dma_chan_get_dev(chan);
++
++ if (config->device_fc) {
++ dev_err(dma_dev->ddev.dev, "not support flow controller\n");
++ return -EINVAL;
++ }
++
++ switch (config->direction) {
++ case DMA_MEM_TO_DEV:
++ if (config->dst_addr_width != DMA_SLAVE_BUSWIDTH_4_BYTES) {
++ dev_err(dma_dev->ddev.dev, "only support 4 byte buswidth\n");
++ return -EINVAL;
++ }
++ chan->slave_id = config->slave_id;
++ chan->fifo_addr = config->dst_addr;
++ chan->burst_size = gdma_dma_maxburst(config->dst_maxburst);
++ break;
++ case DMA_DEV_TO_MEM:
++ if (config->src_addr_width != DMA_SLAVE_BUSWIDTH_4_BYTES) {
++ dev_err(dma_dev->ddev.dev, "only support 4 byte buswidth\n");
++ return -EINVAL;
++ }
++ chan->slave_id = config->slave_id;
++ chan->fifo_addr = config->src_addr;
++ chan->burst_size = gdma_dma_maxburst(config->src_maxburst);
++ break;
++ default:
++ dev_err(dma_dev->ddev.dev, "direction type %d error\n",
++ config->direction);
++ return -EINVAL;
++ }
++
++ return 0;
++}
++
++static int gdma_dma_terminate_all(struct dma_chan *c)
++{
++ struct gdma_dmaengine_chan *chan = to_gdma_dma_chan(c);
++ struct gdma_dma_dev *dma_dev = gdma_dma_chan_get_dev(chan);
++ unsigned long flags, timeout;
++ LIST_HEAD(head);
++ int i = 0;
++
++ spin_lock_irqsave(&chan->vchan.lock, flags);
++ chan->desc = NULL;
++ clear_bit(chan->id, &dma_dev->chan_issued);
++ vchan_get_all_descriptors(&chan->vchan, &head);
++ spin_unlock_irqrestore(&chan->vchan.lock, flags);
++
++ vchan_dma_desc_free_list(&chan->vchan, &head);
++
++ /* wait dma transfer complete */
++ timeout = jiffies + msecs_to_jiffies(5000);
++ while (gdma_dma_read(dma_dev, GDMA_REG_CTRL0(chan->id)) &
++ GDMA_REG_CTRL0_ENABLE) {
++ if (time_after_eq(jiffies, timeout)) {
++ dev_err(dma_dev->ddev.dev, "chan %d wait timeout\n",
++ chan->id);
++ /* restore to init value */
++ gdma_dma_write(dma_dev, GDMA_REG_CTRL0(chan->id), 0);
++ break;
++ }
++ cpu_relax();
++ i++;
++ }
++
++ if (i)
++ dev_dbg(dma_dev->ddev.dev, "terminate chan %d loops %d\n",
++ chan->id, i);
++
++ return 0;
++}
++
++static void rt305x_dump_reg(struct gdma_dma_dev *dma_dev, int id)
++{
++ dev_dbg(dma_dev->ddev.dev, "chan %d, src %08x, dst %08x, ctr0 %08x, " \
++ "ctr1 %08x, intr %08x, signal %08x\n", id,
++ gdma_dma_read(dma_dev, GDMA_REG_SRC_ADDR(id)),
++ gdma_dma_read(dma_dev, GDMA_REG_DST_ADDR(id)),
++ gdma_dma_read(dma_dev, GDMA_REG_CTRL0(id)),
++ gdma_dma_read(dma_dev, GDMA_REG_CTRL1(id)),
++ gdma_dma_read(dma_dev, GDMA_RT305X_STATUS_INT),
++ gdma_dma_read(dma_dev, GDMA_RT305X_STATUS_SIGNAL));
++}
++
++static int rt305x_gdma_start_transfer(struct gdma_dmaengine_chan *chan)
++{
++ struct gdma_dma_dev *dma_dev = gdma_dma_chan_get_dev(chan);
++ dma_addr_t src_addr, dst_addr;
++ struct gdma_dma_sg *sg;
++ uint32_t ctrl0, ctrl1;
++
++ /* verify chan is already stopped */
++ ctrl0 = gdma_dma_read(dma_dev, GDMA_REG_CTRL0(chan->id));
++ if (unlikely(ctrl0 & GDMA_REG_CTRL0_ENABLE)) {
++ dev_err(dma_dev->ddev.dev, "chan %d is start(%08x).\n",
++ chan->id, ctrl0);
++ rt305x_dump_reg(dma_dev, chan->id);
++ return -EINVAL;
++ }
++
++ sg = &chan->desc->sg[chan->next_sg];
++ if (chan->desc->direction == DMA_MEM_TO_DEV) {
++ src_addr = sg->src_addr;
++ dst_addr = chan->fifo_addr;
++ ctrl0 = GDMA_REG_CTRL0_DST_ADDR_FIXED | \
++ (8 << GDMA_RT305X_CTRL0_SRC_REQ_SHIFT) | \
++ (chan->slave_id << GDMA_RT305X_CTRL0_DST_REQ_SHIFT);
++ } else if (chan->desc->direction == DMA_DEV_TO_MEM) {
++ src_addr = chan->fifo_addr;
++ dst_addr = sg->dst_addr;
++ ctrl0 = GDMA_REG_CTRL0_SRC_ADDR_FIXED | \
++ (chan->slave_id << GDMA_RT305X_CTRL0_SRC_REQ_SHIFT) | \
++ (8 << GDMA_RT305X_CTRL0_DST_REQ_SHIFT);
++ } else if (chan->desc->direction == DMA_MEM_TO_MEM) {
++ /*
++ * TODO: memcpy function have bugs. sometime it will copy
++ * more 8 bytes data when using dmatest verify.
++ */
++ src_addr = sg->src_addr;
++ dst_addr = sg->dst_addr;
++ ctrl0 = GDMA_REG_CTRL0_SW_MODE | \
++ (8 << GDMA_REG_CTRL1_SRC_REQ_SHIFT) | \
++ (8 << GDMA_REG_CTRL1_DST_REQ_SHIFT);
++ } else {
++ dev_err(dma_dev->ddev.dev, "direction type %d error\n",
++ chan->desc->direction);
++ return -EINVAL;
++ }
++
++ ctrl0 |= (sg->len << GDMA_REG_CTRL0_TX_SHIFT) | \
++ (chan->burst_size << GDMA_REG_CTRL0_BURST_SHIFT) | \
++ GDMA_REG_CTRL0_DONE_INT | GDMA_REG_CTRL0_ENABLE;
++ ctrl1 = chan->id << GDMA_REG_CTRL1_NEXT_SHIFT;
++
++ chan->next_sg++;
++ gdma_dma_write(dma_dev, GDMA_REG_SRC_ADDR(chan->id), src_addr);
++ gdma_dma_write(dma_dev, GDMA_REG_DST_ADDR(chan->id), dst_addr);
++ gdma_dma_write(dma_dev, GDMA_REG_CTRL1(chan->id), ctrl1);
++
++ /* make sure next_sg is update */
++ wmb();
++ gdma_dma_write(dma_dev, GDMA_REG_CTRL0(chan->id), ctrl0);
++
++ return 0;
++}
++
++static void rt3883_dump_reg(struct gdma_dma_dev *dma_dev, int id)
++{
++ dev_dbg(dma_dev->ddev.dev, "chan %d, src %08x, dst %08x, ctr0 %08x, " \
++ "ctr1 %08x, unmask %08x, done %08x, " \
++ "req %08x, ack %08x, fin %08x\n", id,
++ gdma_dma_read(dma_dev, GDMA_REG_SRC_ADDR(id)),
++ gdma_dma_read(dma_dev, GDMA_REG_DST_ADDR(id)),
++ gdma_dma_read(dma_dev, GDMA_REG_CTRL0(id)),
++ gdma_dma_read(dma_dev, GDMA_REG_CTRL1(id)),
++ gdma_dma_read(dma_dev, GDMA_REG_UNMASK_INT),
++ gdma_dma_read(dma_dev, GDMA_REG_DONE_INT),
++ gdma_dma_read(dma_dev, GDMA_REG_REQSTS),
++ gdma_dma_read(dma_dev, GDMA_REG_ACKSTS),
++ gdma_dma_read(dma_dev, GDMA_REG_FINSTS));
++}
++
++static int rt3883_gdma_start_transfer(struct gdma_dmaengine_chan *chan)
++{
++ struct gdma_dma_dev *dma_dev = gdma_dma_chan_get_dev(chan);
++ dma_addr_t src_addr, dst_addr;
++ struct gdma_dma_sg *sg;
++ uint32_t ctrl0, ctrl1;
++
++ /* verify chan is already stopped */
++ ctrl0 = gdma_dma_read(dma_dev, GDMA_REG_CTRL0(chan->id));
++ if (unlikely(ctrl0 & GDMA_REG_CTRL0_ENABLE)) {
++ dev_err(dma_dev->ddev.dev, "chan %d is start(%08x).\n",
++ chan->id, ctrl0);
++ rt3883_dump_reg(dma_dev, chan->id);
++ return -EINVAL;
++ }
++
++ sg = &chan->desc->sg[chan->next_sg];
++ if (chan->desc->direction == DMA_MEM_TO_DEV) {
++ src_addr = sg->src_addr;
++ dst_addr = chan->fifo_addr;
++ ctrl0 = GDMA_REG_CTRL0_DST_ADDR_FIXED;
++ ctrl1 = (32 << GDMA_REG_CTRL1_SRC_REQ_SHIFT) | \
++ (chan->slave_id << GDMA_REG_CTRL1_DST_REQ_SHIFT);
++ } else if (chan->desc->direction == DMA_DEV_TO_MEM) {
++ src_addr = chan->fifo_addr;
++ dst_addr = sg->dst_addr;
++ ctrl0 = GDMA_REG_CTRL0_SRC_ADDR_FIXED;
++ ctrl1 = (chan->slave_id << GDMA_REG_CTRL1_SRC_REQ_SHIFT) | \
++ (32 << GDMA_REG_CTRL1_DST_REQ_SHIFT) | \
++ GDMA_REG_CTRL1_COHERENT;
++ } else if (chan->desc->direction == DMA_MEM_TO_MEM) {
++ src_addr = sg->src_addr;
++ dst_addr = sg->dst_addr;
++ ctrl0 = GDMA_REG_CTRL0_SW_MODE;
++ ctrl1 = (32 << GDMA_REG_CTRL1_SRC_REQ_SHIFT) | \
++ (32 << GDMA_REG_CTRL1_DST_REQ_SHIFT) | \
++ GDMA_REG_CTRL1_COHERENT;
++ } else {
++ dev_err(dma_dev->ddev.dev, "direction type %d error\n",
++ chan->desc->direction);
++ return -EINVAL;
++ }
++
++ ctrl0 |= (sg->len << GDMA_REG_CTRL0_TX_SHIFT) | \
++ (chan->burst_size << GDMA_REG_CTRL0_BURST_SHIFT) | \
++ GDMA_REG_CTRL0_DONE_INT | GDMA_REG_CTRL0_ENABLE;
++ ctrl1 |= chan->id << GDMA_REG_CTRL1_NEXT_SHIFT;
++
++ chan->next_sg++;
++ gdma_dma_write(dma_dev, GDMA_REG_SRC_ADDR(chan->id), src_addr);
++ gdma_dma_write(dma_dev, GDMA_REG_DST_ADDR(chan->id), dst_addr);
++ gdma_dma_write(dma_dev, GDMA_REG_CTRL1(chan->id), ctrl1);
++
++ /* make sure next_sg is update */
++ wmb();
++ gdma_dma_write(dma_dev, GDMA_REG_CTRL0(chan->id), ctrl0);
++
++ return 0;
++}
++
++static inline int gdma_start_transfer(struct gdma_dma_dev *dma_dev,
++ struct gdma_dmaengine_chan *chan)
++{
++ return dma_dev->data->start_transfer(chan);
++}
++
++static int gdma_next_desc(struct gdma_dmaengine_chan *chan)
++{
++ struct virt_dma_desc *vdesc;
++
++ vdesc = vchan_next_desc(&chan->vchan);
++ if (!vdesc) {
++ chan->desc = NULL;
++ return 0;
++ }
++ chan->desc = to_gdma_dma_desc(vdesc);
++ chan->next_sg = 0;
++
++ return 1;
++}
++
++static void gdma_dma_chan_irq(struct gdma_dma_dev *dma_dev,
++ struct gdma_dmaengine_chan *chan)
++{
++ struct gdma_dma_desc *desc;
++ unsigned long flags;
++ int chan_issued;
++
++ chan_issued = 0;
++ spin_lock_irqsave(&chan->vchan.lock, flags);
++ desc = chan->desc;
++ if (desc) {
++ if (desc->cyclic) {
++ vchan_cyclic_callback(&desc->vdesc);
++ if (chan->next_sg == desc->num_sgs)
++ chan->next_sg = 0;
++ chan_issued = 1;
++ } else {
++ desc->residue -= desc->sg[chan->next_sg - 1].len;
++ if (chan->next_sg == desc->num_sgs) {
++ list_del(&desc->vdesc.node);
++ vchan_cookie_complete(&desc->vdesc);
++ chan_issued = gdma_next_desc(chan);
++ } else
++ chan_issued = 1;
++ }
++ } else
++ dev_dbg(dma_dev->ddev.dev, "chan %d no desc to complete\n",
++ chan->id);
++ if (chan_issued)
++ set_bit(chan->id, &dma_dev->chan_issued);
++ spin_unlock_irqrestore(&chan->vchan.lock, flags);
++}
++
++static irqreturn_t gdma_dma_irq(int irq, void *devid)
++{
++ struct gdma_dma_dev *dma_dev = devid;
++ u32 done, done_reg;
++ unsigned int i;
++
++ done_reg = dma_dev->data->done_int_reg;
++ done = gdma_dma_read(dma_dev, done_reg);
++ if (unlikely(!done))
++ return IRQ_NONE;
++
++ /* clean done bits */
++ gdma_dma_write(dma_dev, done_reg, done);
++
++ i = 0;
++ while (done) {
++ if (done & 0x1) {
++ gdma_dma_chan_irq(dma_dev, &dma_dev->chan[i]);
++ atomic_dec(&dma_dev->cnt);
++ }
++ done >>= 1;
++ i++;
++ }
++
++ /* start only have work to do */
++ if (dma_dev->chan_issued)
++ tasklet_schedule(&dma_dev->task);
++
++ return IRQ_HANDLED;
++}
++
++static void gdma_dma_issue_pending(struct dma_chan *c)
++{
++ struct gdma_dmaengine_chan *chan = to_gdma_dma_chan(c);
++ struct gdma_dma_dev *dma_dev = gdma_dma_chan_get_dev(chan);
++ unsigned long flags;
++
++ spin_lock_irqsave(&chan->vchan.lock, flags);
++ if (vchan_issue_pending(&chan->vchan) && !chan->desc) {
++ if (gdma_next_desc(chan)) {
++ set_bit(chan->id, &dma_dev->chan_issued);
++ tasklet_schedule(&dma_dev->task);
++ } else
++ dev_dbg(dma_dev->ddev.dev, "chan %d no desc to issue\n",
++ chan->id);
++ }
++ spin_unlock_irqrestore(&chan->vchan.lock, flags);
++}
++
++static struct dma_async_tx_descriptor *gdma_dma_prep_slave_sg(
++ struct dma_chan *c, struct scatterlist *sgl,
++ unsigned int sg_len, enum dma_transfer_direction direction,
++ unsigned long flags, void *context)
++{
++ struct gdma_dmaengine_chan *chan = to_gdma_dma_chan(c);
++ struct gdma_dma_desc *desc;
++ struct scatterlist *sg;
++ unsigned int i;
++
++ desc = gdma_dma_alloc_desc(sg_len);
++ if (!desc) {
++ dev_err(c->device->dev, "alloc sg decs error\n");
++ return NULL;
++ }
++ desc->residue = 0;
++
++ for_each_sg(sgl, sg, sg_len, i) {
++ if (direction == DMA_MEM_TO_DEV)
++ desc->sg[i].src_addr = sg_dma_address(sg);
++ else if (direction == DMA_DEV_TO_MEM)
++ desc->sg[i].dst_addr = sg_dma_address(sg);
++ else {
++ dev_err(c->device->dev, "direction type %d error\n",
++ direction);
++ goto free_desc;
++ }
++
++ if (unlikely(sg_dma_len(sg) > GDMA_REG_CTRL0_TX_MASK)) {
++ dev_err(c->device->dev, "sg len too large %d\n",
++ sg_dma_len(sg));
++ goto free_desc;
++ }
++ desc->sg[i].len = sg_dma_len(sg);
++ desc->residue += sg_dma_len(sg);
++ }
++
++ desc->num_sgs = sg_len;
++ desc->direction = direction;
++ desc->cyclic = false;
++
++ return vchan_tx_prep(&chan->vchan, &desc->vdesc, flags);
++
++free_desc:
++ kfree(desc);
++ return NULL;
++}
++
++static struct dma_async_tx_descriptor * gdma_dma_prep_dma_memcpy(
++ struct dma_chan *c, dma_addr_t dest, dma_addr_t src,
++ size_t len, unsigned long flags)
++{
++ struct gdma_dmaengine_chan *chan = to_gdma_dma_chan(c);
++ struct gdma_dma_desc *desc;
++ unsigned int num_periods, i;
++ size_t xfer_count;
++
++ if (len <= 0)
++ return NULL;
++
++ chan->burst_size = gdma_dma_maxburst(len >> 2);
++
++ xfer_count = GDMA_REG_CTRL0_TX_MASK;
++ num_periods = DIV_ROUND_UP(len, xfer_count);
++
++ desc = gdma_dma_alloc_desc(num_periods);
++ if (!desc) {
++ dev_err(c->device->dev, "alloc memcpy decs error\n");
++ return NULL;
++ }
++ desc->residue = len;
++
++ for (i = 0; i < num_periods; i++) {
++ desc->sg[i].src_addr = src;
++ desc->sg[i].dst_addr = dest;
++ if (len > xfer_count) {
++ desc->sg[i].len = xfer_count;
++ } else {
++ desc->sg[i].len = len;
++ }
++ src += desc->sg[i].len;
++ dest += desc->sg[i].len;
++ len -= desc->sg[i].len;
++ }
++
++ desc->num_sgs = num_periods;
++ desc->direction = DMA_MEM_TO_MEM;
++ desc->cyclic = false;
++
++ return vchan_tx_prep(&chan->vchan, &desc->vdesc, flags);
++}
++
++static struct dma_async_tx_descriptor *gdma_dma_prep_dma_cyclic(
++ struct dma_chan *c, dma_addr_t buf_addr, size_t buf_len,
++ size_t period_len, enum dma_transfer_direction direction,
++ unsigned long flags)
++{
++ struct gdma_dmaengine_chan *chan = to_gdma_dma_chan(c);
++ struct gdma_dma_desc *desc;
++ unsigned int num_periods, i;
++
++ if (buf_len % period_len)
++ return NULL;
++
++ if (period_len > GDMA_REG_CTRL0_TX_MASK) {
++ dev_err(c->device->dev, "cyclic len too large %d\n",
++ period_len);
++ return NULL;
++ }
++
++ num_periods = buf_len / period_len;
++ desc = gdma_dma_alloc_desc(num_periods);
++ if (!desc) {
++ dev_err(c->device->dev, "alloc cyclic decs error\n");
++ return NULL;
++ }
++ desc->residue = buf_len;
++
++ for (i = 0; i < num_periods; i++) {
++ if (direction == DMA_MEM_TO_DEV)
++ desc->sg[i].src_addr = buf_addr;
++ else if (direction == DMA_DEV_TO_MEM)
++ desc->sg[i].dst_addr = buf_addr;
++ else {
++ dev_err(c->device->dev, "direction type %d error\n",
++ direction);
++ goto free_desc;
++ }
++ desc->sg[i].len = period_len;
++ buf_addr += period_len;
++ }
++
++ desc->num_sgs = num_periods;
++ desc->direction = direction;
++ desc->cyclic = true;
++
++ return vchan_tx_prep(&chan->vchan, &desc->vdesc, flags);
++
++free_desc:
++ kfree(desc);
++ return NULL;
++}
++
++static enum dma_status gdma_dma_tx_status(struct dma_chan *c,
++ dma_cookie_t cookie, struct dma_tx_state *state)
++{
++ struct gdma_dmaengine_chan *chan = to_gdma_dma_chan(c);
++ struct virt_dma_desc *vdesc;
++ enum dma_status status;
++ unsigned long flags;
++ struct gdma_dma_desc *desc;
++
++ status = dma_cookie_status(c, cookie, state);
++ if (status == DMA_COMPLETE || !state)
++ return status;
++
++ spin_lock_irqsave(&chan->vchan.lock, flags);
++ desc = chan->desc;
++ if (desc && (cookie == desc->vdesc.tx.cookie)) {
++ /*
++ * We never update edesc->residue in the cyclic case, so we
++ * can tell the remaining room to the end of the circular
++ * buffer.
++ */
++ if (desc->cyclic)
++ state->residue = desc->residue -
++ ((chan->next_sg - 1) * desc->sg[0].len);
++ else
++ state->residue = desc->residue;
++ } else if ((vdesc = vchan_find_desc(&chan->vchan, cookie)))
++ state->residue = to_gdma_dma_desc(vdesc)->residue;
++ spin_unlock_irqrestore(&chan->vchan.lock, flags);
++
++ dev_dbg(c->device->dev, "tx residue %d bytes\n", state->residue);
++
++ return status;
++}
++
++static void gdma_dma_free_chan_resources(struct dma_chan *c)
++{
++ vchan_free_chan_resources(to_virt_chan(c));
++}
++
++static void gdma_dma_desc_free(struct virt_dma_desc *vdesc)
++{
++ kfree(container_of(vdesc, struct gdma_dma_desc, vdesc));
++}
++
++static void gdma_dma_tasklet(unsigned long arg)
++{
++ struct gdma_dma_dev *dma_dev = (struct gdma_dma_dev *)arg;
++ struct gdma_dmaengine_chan *chan;
++ static unsigned int last_chan;
++ unsigned int i, chan_mask;
++
++ /* record last chan to round robin all chans */
++ i = last_chan;
++ chan_mask = dma_dev->data->chancnt - 1;
++ do {
++ /*
++ * on mt7621. when verify with dmatest with all
++ * channel is enable. we need to limit only two
++ * channel is working at the same time. otherwise the
++ * data will have problem.
++ */
++ if (atomic_read(&dma_dev->cnt) >= 2) {
++ last_chan = i;
++ break;
++ }
++
++ if (test_and_clear_bit(i, &dma_dev->chan_issued)) {
++ chan = &dma_dev->chan[i];
++ if (chan->desc) {
++ atomic_inc(&dma_dev->cnt);
++ gdma_start_transfer(dma_dev, chan);
++ } else
++ dev_dbg(dma_dev->ddev.dev, "chan %d no desc to issue\n", chan->id);
++
++ if (!dma_dev->chan_issued)
++ break;
++ }
++
++ i = (i + 1) & chan_mask;
++ } while (i != last_chan);
++}
++
++static void rt305x_gdma_init(struct gdma_dma_dev *dma_dev)
++{
++ uint32_t gct;
++
++ /* all chans round robin */
++ gdma_dma_write(dma_dev, GDMA_RT305X_GCT, GDMA_REG_GCT_ARBIT_RR);
++
++ gct = gdma_dma_read(dma_dev, GDMA_RT305X_GCT);
++ dev_info(dma_dev->ddev.dev, "revision: %d, channels: %d\n",
++ (gct >> GDMA_REG_GCT_VER_SHIFT) & GDMA_REG_GCT_VER_MASK,
++ 8 << ((gct >> GDMA_REG_GCT_CHAN_SHIFT) &
++ GDMA_REG_GCT_CHAN_MASK));
++}
++
++static void rt3883_gdma_init(struct gdma_dma_dev *dma_dev)
++{
++ uint32_t gct;
++
++ /* all chans round robin */
++ gdma_dma_write(dma_dev, GDMA_REG_GCT, GDMA_REG_GCT_ARBIT_RR);
++
++ gct = gdma_dma_read(dma_dev, GDMA_REG_GCT);
++ dev_info(dma_dev->ddev.dev, "revision: %d, channels: %d\n",
++ (gct >> GDMA_REG_GCT_VER_SHIFT) & GDMA_REG_GCT_VER_MASK,
++ 8 << ((gct >> GDMA_REG_GCT_CHAN_SHIFT) &
++ GDMA_REG_GCT_CHAN_MASK));
++}
++
++static struct gdma_data rt305x_gdma_data = {
++ .chancnt = 8,
++ .done_int_reg = GDMA_RT305X_STATUS_INT,
++ .init = rt305x_gdma_init,
++ .start_transfer = rt305x_gdma_start_transfer,
++};
++
++static struct gdma_data rt3883_gdma_data = {
++ .chancnt = 16,
++ .done_int_reg = GDMA_REG_DONE_INT,
++ .init = rt3883_gdma_init,
++ .start_transfer = rt3883_gdma_start_transfer,
++};
++
++static const struct of_device_id gdma_of_match_table[] = {
++ { .compatible = "ralink,rt305x-gdma", .data = &rt305x_gdma_data },
++ { .compatible = "ralink,rt3883-gdma", .data = &rt3883_gdma_data },
++ { },
++};
++
++static int gdma_dma_probe(struct platform_device *pdev)
++{
++ const struct of_device_id *match;
++ struct gdma_dmaengine_chan *chan;
++ struct gdma_dma_dev *dma_dev;
++ struct dma_device *dd;
++ unsigned int i;
++ struct resource *res;
++ int ret;
++ int irq;
++ void __iomem *base;
++ struct gdma_data *data;
++
++ ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
++ if (ret)
++ return ret;
++
++ match = of_match_device(gdma_of_match_table, &pdev->dev);
++ if (!match)
++ return -EINVAL;
++ data = (struct gdma_data *) match->data;
++
++ dma_dev = devm_kzalloc(&pdev->dev, sizeof(*dma_dev) +
++ (sizeof(struct gdma_dmaengine_chan) * data->chancnt),
++ GFP_KERNEL);
++ if (!dma_dev) {
++ dev_err(&pdev->dev, "alloc dma device failed\n");
++ return -EINVAL;
++ }
++ dma_dev->data = data;
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ base = devm_ioremap_resource(&pdev->dev, res);
++ if (IS_ERR(base))
++ return PTR_ERR(base);
++ dma_dev->base = base;
++ tasklet_init(&dma_dev->task, gdma_dma_tasklet, (unsigned long)dma_dev);
++
++ irq = platform_get_irq(pdev, 0);
++ if (irq < 0) {
++ dev_err(&pdev->dev, "failed to get irq\n");
++ return -EINVAL;
++ }
++ ret = devm_request_irq(&pdev->dev, irq, gdma_dma_irq,
++ 0, dev_name(&pdev->dev), dma_dev);
++ if (ret) {
++ dev_err(&pdev->dev, "failed to request irq\n");
++ return ret;
++ }
++
++ device_reset(&pdev->dev);
++
++ dd = &dma_dev->ddev;
++ dma_cap_set(DMA_MEMCPY, dd->cap_mask);
++ dma_cap_set(DMA_SLAVE, dd->cap_mask);
++ dma_cap_set(DMA_CYCLIC, dd->cap_mask);
++ dd->device_free_chan_resources = gdma_dma_free_chan_resources;
++ dd->device_prep_dma_memcpy = gdma_dma_prep_dma_memcpy;
++ dd->device_prep_slave_sg = gdma_dma_prep_slave_sg;
++ dd->device_prep_dma_cyclic = gdma_dma_prep_dma_cyclic;
++ dd->device_config = gdma_dma_config;
++ dd->device_terminate_all = gdma_dma_terminate_all;
++ dd->device_tx_status = gdma_dma_tx_status;
++ dd->device_issue_pending = gdma_dma_issue_pending;
++
++ dd->src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
++ dd->dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
++ dd->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
++ dd->residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT;
++
++ dd->dev = &pdev->dev;
++ dd->dev->dma_parms = &dma_dev->dma_parms;
++ dma_set_max_seg_size(dd->dev, GDMA_REG_CTRL0_TX_MASK);
++ INIT_LIST_HEAD(&dd->channels);
++
++ for (i = 0; i < data->chancnt; i++) {
++ chan = &dma_dev->chan[i];
++ chan->id = i;
++ chan->vchan.desc_free = gdma_dma_desc_free;
++ vchan_init(&chan->vchan, dd);
++ }
++
++ /* init hardware */
++ data->init(dma_dev);
++
++ ret = dma_async_device_register(dd);
++ if (ret) {
++ dev_err(&pdev->dev, "failed to register dma device\n");
++ return ret;
++ }
++
++ ret = of_dma_controller_register(pdev->dev.of_node,
++ of_dma_xlate_by_chan_id, dma_dev);
++ if (ret) {
++ dev_err(&pdev->dev, "failed to register of dma controller\n");
++ goto err_unregister;
++ }
++
++ platform_set_drvdata(pdev, dma_dev);
++
++ return 0;
++
++err_unregister:
++ dma_async_device_unregister(dd);
++ return ret;
++}
++
++static int gdma_dma_remove(struct platform_device *pdev)
++{
++ struct gdma_dma_dev *dma_dev = platform_get_drvdata(pdev);
++
++ tasklet_kill(&dma_dev->task);
++ of_dma_controller_free(pdev->dev.of_node);
++ dma_async_device_unregister(&dma_dev->ddev);
++
++ return 0;
++}
++
++static struct platform_driver gdma_dma_driver = {
++ .probe = gdma_dma_probe,
++ .remove = gdma_dma_remove,
++ .driver = {
++ .name = "gdma-rt2880",
++ .of_match_table = gdma_of_match_table,
++ },
++};
++module_platform_driver(gdma_dma_driver);
++
++MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
++MODULE_DESCRIPTION("Ralink/MTK DMA driver");
++MODULE_LICENSE("GPL v2");
+--- a/include/linux/dmaengine.h
++++ b/include/linux/dmaengine.h
+@@ -525,6 +525,7 @@ static inline void dma_set_unmap(struct
+ struct dmaengine_unmap_data *
+ dmaengine_get_unmap_data(struct device *dev, int nr, gfp_t flags);
+ void dmaengine_unmap_put(struct dmaengine_unmap_data *unmap);
++struct dma_chan *dma_get_slave_channel(struct dma_chan *chan);
+ #else
+ static inline void dma_set_unmap(struct dma_async_tx_descriptor *tx,
+ struct dmaengine_unmap_data *unmap)
+--- /dev/null
++++ b/drivers/dma/mtk-hsdma.c
+@@ -0,0 +1,767 @@
++/*
++ * Copyright (C) 2015, Michael Lee <igvtee@gmail.com>
++ * MTK HSDMA support
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License as published by the
++ * Free Software Foundation; either version 2 of the License, or (at your
++ * option) any later version.
++ *
++ */
++
++#include <linux/dmaengine.h>
++#include <linux/dma-mapping.h>
++#include <linux/err.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/slab.h>
++#include <linux/spinlock.h>
++#include <linux/irq.h>
++#include <linux/of_dma.h>
++#include <linux/reset.h>
++#include <linux/of_device.h>
++
++#include "virt-dma.h"
++
++#define HSDMA_BASE_OFFSET 0x800
++
++#define HSDMA_REG_TX_BASE 0x00
++#define HSDMA_REG_TX_CNT 0x04
++#define HSDMA_REG_TX_CTX 0x08
++#define HSDMA_REG_TX_DTX 0x0c
++#define HSDMA_REG_RX_BASE 0x100
++#define HSDMA_REG_RX_CNT 0x104
++#define HSDMA_REG_RX_CRX 0x108
++#define HSDMA_REG_RX_DRX 0x10c
++#define HSDMA_REG_INFO 0x200
++#define HSDMA_REG_GLO_CFG 0x204
++#define HSDMA_REG_RST_CFG 0x208
++#define HSDMA_REG_DELAY_INT 0x20c
++#define HSDMA_REG_FREEQ_THRES 0x210
++#define HSDMA_REG_INT_STATUS 0x220
++#define HSDMA_REG_INT_MASK 0x228
++#define HSDMA_REG_SCH_Q01 0x280
++#define HSDMA_REG_SCH_Q23 0x284
++
++#define HSDMA_DESCS_MAX 0xfff
++#define HSDMA_DESCS_NUM 8
++#define HSDMA_DESCS_MASK (HSDMA_DESCS_NUM - 1)
++#define HSDMA_NEXT_DESC(x) (((x) + 1) & HSDMA_DESCS_MASK)
++
++/* HSDMA_REG_INFO */
++#define HSDMA_INFO_INDEX_MASK 0xf
++#define HSDMA_INFO_INDEX_SHIFT 24
++#define HSDMA_INFO_BASE_MASK 0xff
++#define HSDMA_INFO_BASE_SHIFT 16
++#define HSDMA_INFO_RX_MASK 0xff
++#define HSDMA_INFO_RX_SHIFT 8
++#define HSDMA_INFO_TX_MASK 0xff
++#define HSDMA_INFO_TX_SHIFT 0
++
++/* HSDMA_REG_GLO_CFG */
++#define HSDMA_GLO_TX_2B_OFFSET BIT(31)
++#define HSDMA_GLO_CLK_GATE BIT(30)
++#define HSDMA_GLO_BYTE_SWAP BIT(29)
++#define HSDMA_GLO_MULTI_DMA BIT(10)
++#define HSDMA_GLO_TWO_BUF BIT(9)
++#define HSDMA_GLO_32B_DESC BIT(8)
++#define HSDMA_GLO_BIG_ENDIAN BIT(7)
++#define HSDMA_GLO_TX_DONE BIT(6)
++#define HSDMA_GLO_BT_MASK 0x3
++#define HSDMA_GLO_BT_SHIFT 4
++#define HSDMA_GLO_RX_BUSY BIT(3)
++#define HSDMA_GLO_RX_DMA BIT(2)
++#define HSDMA_GLO_TX_BUSY BIT(1)
++#define HSDMA_GLO_TX_DMA BIT(0)
++
++#define HSDMA_BT_SIZE_16BYTES (0 << HSDMA_GLO_BT_SHIFT)
++#define HSDMA_BT_SIZE_32BYTES (1 << HSDMA_GLO_BT_SHIFT)
++#define HSDMA_BT_SIZE_64BYTES (2 << HSDMA_GLO_BT_SHIFT)
++#define HSDMA_BT_SIZE_128BYTES (3 << HSDMA_GLO_BT_SHIFT)
++
++#define HSDMA_GLO_DEFAULT (HSDMA_GLO_MULTI_DMA | \
++ HSDMA_GLO_RX_DMA | HSDMA_GLO_TX_DMA | HSDMA_BT_SIZE_32BYTES)
++
++/* HSDMA_REG_RST_CFG */
++#define HSDMA_RST_RX_SHIFT 16
++#define HSDMA_RST_TX_SHIFT 0
++
++/* HSDMA_REG_DELAY_INT */
++#define HSDMA_DELAY_INT_EN BIT(15)
++#define HSDMA_DELAY_PEND_OFFSET 8
++#define HSDMA_DELAY_TIME_OFFSET 0
++#define HSDMA_DELAY_TX_OFFSET 16
++#define HSDMA_DELAY_RX_OFFSET 0
++
++#define HSDMA_DELAY_INIT(x) (HSDMA_DELAY_INT_EN | \
++ ((x) << HSDMA_DELAY_PEND_OFFSET))
++#define HSDMA_DELAY(x) ((HSDMA_DELAY_INIT(x) << \
++ HSDMA_DELAY_TX_OFFSET) | HSDMA_DELAY_INIT(x))
++
++/* HSDMA_REG_INT_STATUS */
++#define HSDMA_INT_DELAY_RX_COH BIT(31)
++#define HSDMA_INT_DELAY_RX_INT BIT(30)
++#define HSDMA_INT_DELAY_TX_COH BIT(29)
++#define HSDMA_INT_DELAY_TX_INT BIT(28)
++#define HSDMA_INT_RX_MASK 0x3
++#define HSDMA_INT_RX_SHIFT 16
++#define HSDMA_INT_RX_Q0 BIT(16)
++#define HSDMA_INT_TX_MASK 0xf
++#define HSDMA_INT_TX_SHIFT 0
++#define HSDMA_INT_TX_Q0 BIT(0)
++
++/* tx/rx dma desc flags */
++#define HSDMA_PLEN_MASK 0x3fff
++#define HSDMA_DESC_DONE BIT(31)
++#define HSDMA_DESC_LS0 BIT(30)
++#define HSDMA_DESC_PLEN0(_x) (((_x) & HSDMA_PLEN_MASK) << 16)
++#define HSDMA_DESC_TAG BIT(15)
++#define HSDMA_DESC_LS1 BIT(14)
++#define HSDMA_DESC_PLEN1(_x) ((_x) & HSDMA_PLEN_MASK)
++
++/* align 4 bytes */
++#define HSDMA_ALIGN_SIZE 3
++/* align size 128bytes */
++#define HSDMA_MAX_PLEN 0x3f80
++
++struct hsdma_desc {
++ u32 addr0;
++ u32 flags;
++ u32 addr1;
++ u32 unused;
++};
++
++struct mtk_hsdma_sg {
++ dma_addr_t src_addr;
++ dma_addr_t dst_addr;
++ u32 len;
++};
++
++struct mtk_hsdma_desc {
++ struct virt_dma_desc vdesc;
++ unsigned int num_sgs;
++ struct mtk_hsdma_sg sg[1];
++};
++
++struct mtk_hsdma_chan {
++ struct virt_dma_chan vchan;
++ unsigned int id;
++ dma_addr_t desc_addr;
++ int tx_idx;
++ int rx_idx;
++ struct hsdma_desc *tx_ring;
++ struct hsdma_desc *rx_ring;
++ struct mtk_hsdma_desc *desc;
++ unsigned int next_sg;
++};
++
++struct mtk_hsdam_engine {
++ struct dma_device ddev;
++ struct device_dma_parameters dma_parms;
++ void __iomem *base;
++ struct tasklet_struct task;
++ volatile unsigned long chan_issued;
++
++ struct mtk_hsdma_chan chan[1];
++};
++
++static inline struct mtk_hsdam_engine *mtk_hsdma_chan_get_dev(
++ struct mtk_hsdma_chan *chan)
++{
++ return container_of(chan->vchan.chan.device, struct mtk_hsdam_engine,
++ ddev);
++}
++
++static inline struct mtk_hsdma_chan *to_mtk_hsdma_chan(struct dma_chan *c)
++{
++ return container_of(c, struct mtk_hsdma_chan, vchan.chan);
++}
++
++static inline struct mtk_hsdma_desc *to_mtk_hsdma_desc(
++ struct virt_dma_desc *vdesc)
++{
++ return container_of(vdesc, struct mtk_hsdma_desc, vdesc);
++}
++
++static inline u32 mtk_hsdma_read(struct mtk_hsdam_engine *hsdma, u32 reg)
++{
++ return readl(hsdma->base + reg);
++}
++
++static inline void mtk_hsdma_write(struct mtk_hsdam_engine *hsdma,
++ unsigned reg, u32 val)
++{
++ writel(val, hsdma->base + reg);
++}
++
++static void mtk_hsdma_reset_chan(struct mtk_hsdam_engine *hsdma,
++ struct mtk_hsdma_chan *chan)
++{
++ chan->tx_idx = 0;
++ chan->rx_idx = HSDMA_DESCS_NUM - 1;
++
++ mtk_hsdma_write(hsdma, HSDMA_REG_TX_CTX, chan->tx_idx);
++ mtk_hsdma_write(hsdma, HSDMA_REG_RX_CRX, chan->rx_idx);
++
++ mtk_hsdma_write(hsdma, HSDMA_REG_RST_CFG,
++ 0x1 << (chan->id + HSDMA_RST_TX_SHIFT));
++ mtk_hsdma_write(hsdma, HSDMA_REG_RST_CFG,
++ 0x1 << (chan->id + HSDMA_RST_RX_SHIFT));
++}
++
++static void hsdma_dump_reg(struct mtk_hsdam_engine *hsdma)
++{
++ dev_dbg(hsdma->ddev.dev, "tbase %08x, tcnt %08x, " \
++ "tctx %08x, tdtx: %08x, rbase %08x, " \
++ "rcnt %08x, rctx %08x, rdtx %08x\n",
++ mtk_hsdma_read(hsdma, HSDMA_REG_TX_BASE),
++ mtk_hsdma_read(hsdma, HSDMA_REG_TX_CNT),
++ mtk_hsdma_read(hsdma, HSDMA_REG_TX_CTX),
++ mtk_hsdma_read(hsdma, HSDMA_REG_TX_DTX),
++ mtk_hsdma_read(hsdma, HSDMA_REG_RX_BASE),
++ mtk_hsdma_read(hsdma, HSDMA_REG_RX_CNT),
++ mtk_hsdma_read(hsdma, HSDMA_REG_RX_CRX),
++ mtk_hsdma_read(hsdma, HSDMA_REG_RX_DRX));
++
++ dev_dbg(hsdma->ddev.dev, "info %08x, glo %08x, delay %08x, " \
++ "intr_stat %08x, intr_mask %08x\n",
++ mtk_hsdma_read(hsdma, HSDMA_REG_INFO),
++ mtk_hsdma_read(hsdma, HSDMA_REG_GLO_CFG),
++ mtk_hsdma_read(hsdma, HSDMA_REG_DELAY_INT),
++ mtk_hsdma_read(hsdma, HSDMA_REG_INT_STATUS),
++ mtk_hsdma_read(hsdma, HSDMA_REG_INT_MASK));
++}
++
++static void hsdma_dump_desc(struct mtk_hsdam_engine *hsdma,
++ struct mtk_hsdma_chan *chan)
++{
++ struct hsdma_desc *tx_desc;
++ struct hsdma_desc *rx_desc;
++ int i;
++
++ dev_dbg(hsdma->ddev.dev, "tx idx: %d, rx idx: %d\n",
++ chan->tx_idx, chan->rx_idx);
++
++ for (i = 0; i < HSDMA_DESCS_NUM; i++) {
++ tx_desc = &chan->tx_ring[i];
++ rx_desc = &chan->rx_ring[i];
++
++ dev_dbg(hsdma->ddev.dev, "%d tx addr0: %08x, flags %08x, " \
++ "tx addr1: %08x, rx addr0 %08x, flags %08x\n",
++ i, tx_desc->addr0, tx_desc->flags, \
++ tx_desc->addr1, rx_desc->addr0, rx_desc->flags);
++ }
++}
++
++static void mtk_hsdma_reset(struct mtk_hsdam_engine *hsdma,
++ struct mtk_hsdma_chan *chan)
++{
++ int i;
++
++ /* disable dma */
++ mtk_hsdma_write(hsdma, HSDMA_REG_GLO_CFG, 0);
++
++ /* disable intr */
++ mtk_hsdma_write(hsdma, HSDMA_REG_INT_MASK, 0);
++
++ /* init desc value */
++ for (i = 0; i < HSDMA_DESCS_NUM; i++) {
++ chan->tx_ring[i].addr0 = 0;
++ chan->tx_ring[i].flags = HSDMA_DESC_LS0 |
++ HSDMA_DESC_DONE;
++ }
++ for (i = 0; i < HSDMA_DESCS_NUM; i++) {
++ chan->rx_ring[i].addr0 = 0;
++ chan->rx_ring[i].flags = 0;
++ }
++
++ /* reset */
++ mtk_hsdma_reset_chan(hsdma, chan);
++
++ /* enable intr */
++ mtk_hsdma_write(hsdma, HSDMA_REG_INT_MASK, HSDMA_INT_RX_Q0);
++
++ /* enable dma */
++ mtk_hsdma_write(hsdma, HSDMA_REG_GLO_CFG, HSDMA_GLO_DEFAULT);
++}
++
++static int mtk_hsdma_terminate_all(struct dma_chan *c)
++{
++ struct mtk_hsdma_chan *chan = to_mtk_hsdma_chan(c);
++ struct mtk_hsdam_engine *hsdma = mtk_hsdma_chan_get_dev(chan);
++ unsigned long timeout;
++ LIST_HEAD(head);
++
++ spin_lock_bh(&chan->vchan.lock);
++ chan->desc = NULL;
++ clear_bit(chan->id, &hsdma->chan_issued);
++ vchan_get_all_descriptors(&chan->vchan, &head);
++ spin_unlock_bh(&chan->vchan.lock);
++
++ vchan_dma_desc_free_list(&chan->vchan, &head);
++
++ /* wait dma transfer complete */
++ timeout = jiffies + msecs_to_jiffies(2000);
++ while (mtk_hsdma_read(hsdma, HSDMA_REG_GLO_CFG) &
++ (HSDMA_GLO_RX_BUSY | HSDMA_GLO_TX_BUSY)) {
++ if (time_after_eq(jiffies, timeout)) {
++ hsdma_dump_desc(hsdma, chan);
++ mtk_hsdma_reset(hsdma, chan);
++ dev_err(hsdma->ddev.dev, "timeout, reset it\n");
++ break;
++ }
++ cpu_relax();
++ }
++
++ return 0;
++}
++
++static int mtk_hsdma_start_transfer(struct mtk_hsdam_engine *hsdma,
++ struct mtk_hsdma_chan *chan)
++{
++ dma_addr_t src, dst;
++ size_t len, tlen;
++ struct hsdma_desc *tx_desc, *rx_desc;
++ struct mtk_hsdma_sg *sg;
++ unsigned int i;
++ int rx_idx;
++
++ sg = &chan->desc->sg[0];
++ len = sg->len;
++ chan->desc->num_sgs = DIV_ROUND_UP(len, HSDMA_MAX_PLEN);
++
++ /* tx desc */
++ src = sg->src_addr;
++ for (i = 0; i < chan->desc->num_sgs; i++) {
++ if (len > HSDMA_MAX_PLEN)
++ tlen = HSDMA_MAX_PLEN;
++ else
++ tlen = len;
++
++ if (i & 0x1) {
++ tx_desc->addr1 = src;
++ tx_desc->flags |= HSDMA_DESC_PLEN1(tlen);
++ } else {
++ tx_desc = &chan->tx_ring[chan->tx_idx];
++ tx_desc->addr0 = src;
++ tx_desc->flags = HSDMA_DESC_PLEN0(tlen);
++
++ /* update index */
++ chan->tx_idx = HSDMA_NEXT_DESC(chan->tx_idx);
++ }
++
++ src += tlen;
++ len -= tlen;
++ }
++ if (i & 0x1)
++ tx_desc->flags |= HSDMA_DESC_LS0;
++ else
++ tx_desc->flags |= HSDMA_DESC_LS1;
++
++ /* rx desc */
++ rx_idx = HSDMA_NEXT_DESC(chan->rx_idx);
++ len = sg->len;
++ dst = sg->dst_addr;
++ for (i = 0; i < chan->desc->num_sgs; i++) {
++ rx_desc = &chan->rx_ring[rx_idx];
++ if (len > HSDMA_MAX_PLEN)
++ tlen = HSDMA_MAX_PLEN;
++ else
++ tlen = len;
++
++ rx_desc->addr0 = dst;
++ rx_desc->flags = HSDMA_DESC_PLEN0(tlen);
++
++ dst += tlen;
++ len -= tlen;
++
++ /* update index */
++ rx_idx = HSDMA_NEXT_DESC(rx_idx);
++ }
++
++ /* make sure desc and index all up to date */
++ wmb();
++ mtk_hsdma_write(hsdma, HSDMA_REG_TX_CTX, chan->tx_idx);
++
++ return 0;
++}
++
++static int gdma_next_desc(struct mtk_hsdma_chan *chan)
++{
++ struct virt_dma_desc *vdesc;
++
++ vdesc = vchan_next_desc(&chan->vchan);
++ if (!vdesc) {
++ chan->desc = NULL;
++ return 0;
++ }
++ chan->desc = to_mtk_hsdma_desc(vdesc);
++ chan->next_sg = 0;
++
++ return 1;
++}
++
++static void mtk_hsdma_chan_done(struct mtk_hsdam_engine *hsdma,
++ struct mtk_hsdma_chan *chan)
++{
++ struct mtk_hsdma_desc *desc;
++ int chan_issued;
++
++ chan_issued = 0;
++ spin_lock_bh(&chan->vchan.lock);
++ desc = chan->desc;
++ if (likely(desc)) {
++ if (chan->next_sg == desc->num_sgs) {
++ list_del(&desc->vdesc.node);
++ vchan_cookie_complete(&desc->vdesc);
++ chan_issued = gdma_next_desc(chan);
++ }
++ } else
++ dev_dbg(hsdma->ddev.dev, "no desc to complete\n");
++
++ if (chan_issued)
++ set_bit(chan->id, &hsdma->chan_issued);
++ spin_unlock_bh(&chan->vchan.lock);
++}
++
++static irqreturn_t mtk_hsdma_irq(int irq, void *devid)
++{
++ struct mtk_hsdam_engine *hsdma = devid;
++ u32 status;
++
++ status = mtk_hsdma_read(hsdma, HSDMA_REG_INT_STATUS);
++ if (unlikely(!status))
++ return IRQ_NONE;
++
++ if (likely(status & HSDMA_INT_RX_Q0))
++ tasklet_schedule(&hsdma->task);
++ else
++ dev_dbg(hsdma->ddev.dev, "unhandle irq status %08x\n",
++ status);
++ /* clean intr bits */
++ mtk_hsdma_write(hsdma, HSDMA_REG_INT_STATUS, status);
++
++ return IRQ_HANDLED;
++}
++
++static void mtk_hsdma_issue_pending(struct dma_chan *c)
++{
++ struct mtk_hsdma_chan *chan = to_mtk_hsdma_chan(c);
++ struct mtk_hsdam_engine *hsdma = mtk_hsdma_chan_get_dev(chan);
++
++ spin_lock_bh(&chan->vchan.lock);
++ if (vchan_issue_pending(&chan->vchan) && !chan->desc) {
++ if (gdma_next_desc(chan)) {
++ set_bit(chan->id, &hsdma->chan_issued);
++ tasklet_schedule(&hsdma->task);
++ } else
++ dev_dbg(hsdma->ddev.dev, "no desc to issue\n");
++ }
++ spin_unlock_bh(&chan->vchan.lock);
++}
++
++static struct dma_async_tx_descriptor * mtk_hsdma_prep_dma_memcpy(
++ struct dma_chan *c, dma_addr_t dest, dma_addr_t src,
++ size_t len, unsigned long flags)
++{
++ struct mtk_hsdma_chan *chan = to_mtk_hsdma_chan(c);
++ struct mtk_hsdma_desc *desc;
++
++ if (len <= 0)
++ return NULL;
++
++ desc = kzalloc(sizeof(struct mtk_hsdma_desc), GFP_ATOMIC);
++ if (!desc) {
++ dev_err(c->device->dev, "alloc memcpy decs error\n");
++ return NULL;
++ }
++
++ desc->sg[0].src_addr = src;
++ desc->sg[0].dst_addr = dest;
++ desc->sg[0].len = len;
++
++ return vchan_tx_prep(&chan->vchan, &desc->vdesc, flags);
++}
++
++static enum dma_status mtk_hsdma_tx_status(struct dma_chan *c,
++ dma_cookie_t cookie, struct dma_tx_state *state)
++{
++ return dma_cookie_status(c, cookie, state);
++}
++
++static void mtk_hsdma_free_chan_resources(struct dma_chan *c)
++{
++ vchan_free_chan_resources(to_virt_chan(c));
++}
++
++static void mtk_hsdma_desc_free(struct virt_dma_desc *vdesc)
++{
++ kfree(container_of(vdesc, struct mtk_hsdma_desc, vdesc));
++}
++
++static void mtk_hsdma_tx(struct mtk_hsdam_engine *hsdma)
++{
++ struct mtk_hsdma_chan *chan;
++
++ if (test_and_clear_bit(0, &hsdma->chan_issued)) {
++ chan = &hsdma->chan[0];
++ if (chan->desc) {
++ mtk_hsdma_start_transfer(hsdma, chan);
++ } else
++ dev_dbg(hsdma->ddev.dev,"chan 0 no desc to issue\n");
++ }
++}
++
++static void mtk_hsdma_rx(struct mtk_hsdam_engine *hsdma)
++{
++ struct mtk_hsdma_chan *chan;
++ int next_idx, drx_idx, cnt;
++
++ chan = &hsdma->chan[0];
++ next_idx = HSDMA_NEXT_DESC(chan->rx_idx);
++ drx_idx = mtk_hsdma_read(hsdma, HSDMA_REG_RX_DRX);
++
++ cnt = (drx_idx - next_idx) & HSDMA_DESCS_MASK;
++ if (!cnt)
++ return;
++
++ chan->next_sg += cnt;
++ chan->rx_idx = (chan->rx_idx + cnt) & HSDMA_DESCS_MASK;
++
++ /* update rx crx */
++ wmb();
++ mtk_hsdma_write(hsdma, HSDMA_REG_RX_CRX, chan->rx_idx);
++
++ mtk_hsdma_chan_done(hsdma, chan);
++}
++
++static void mtk_hsdma_tasklet(unsigned long arg)
++{
++ struct mtk_hsdam_engine *hsdma = (struct mtk_hsdam_engine *)arg;
++
++ mtk_hsdma_rx(hsdma);
++ mtk_hsdma_tx(hsdma);
++}
++
++static int mtk_hsdam_alloc_desc(struct mtk_hsdam_engine *hsdma,
++ struct mtk_hsdma_chan *chan)
++{
++ int i;
++
++ chan->tx_ring = dma_alloc_coherent(hsdma->ddev.dev,
++ 2 * HSDMA_DESCS_NUM * sizeof(*chan->tx_ring),
++ &chan->desc_addr, GFP_ATOMIC | __GFP_ZERO);
++ if (!chan->tx_ring)
++ goto no_mem;
++
++ chan->rx_ring = &chan->tx_ring[HSDMA_DESCS_NUM];
++
++ /* init tx ring value */
++ for (i = 0; i < HSDMA_DESCS_NUM; i++)
++ chan->tx_ring[i].flags = HSDMA_DESC_LS0 | HSDMA_DESC_DONE;
++
++ return 0;
++no_mem:
++ return -ENOMEM;
++}
++
++static void mtk_hsdam_free_desc(struct mtk_hsdam_engine *hsdma,
++ struct mtk_hsdma_chan *chan)
++{
++ if (chan->tx_ring) {
++ dma_free_coherent(hsdma->ddev.dev,
++ 2 * HSDMA_DESCS_NUM * sizeof(*chan->tx_ring),
++ chan->tx_ring, chan->desc_addr);
++ chan->tx_ring = NULL;
++ chan->rx_ring = NULL;
++ }
++}
++
++static int mtk_hsdma_init(struct mtk_hsdam_engine *hsdma)
++{
++ struct mtk_hsdma_chan *chan;
++ int ret;
++ u32 reg;
++
++ /* init desc */
++ chan = &hsdma->chan[0];
++ ret = mtk_hsdam_alloc_desc(hsdma, chan);
++ if (ret)
++ return ret;
++
++ /* tx */
++ mtk_hsdma_write(hsdma, HSDMA_REG_TX_BASE, chan->desc_addr);
++ mtk_hsdma_write(hsdma, HSDMA_REG_TX_CNT, HSDMA_DESCS_NUM);
++ /* rx */
++ mtk_hsdma_write(hsdma, HSDMA_REG_RX_BASE, chan->desc_addr +
++ (sizeof(struct hsdma_desc) * HSDMA_DESCS_NUM));
++ mtk_hsdma_write(hsdma, HSDMA_REG_RX_CNT, HSDMA_DESCS_NUM);
++ /* reset */
++ mtk_hsdma_reset_chan(hsdma, chan);
++
++ /* enable rx intr */
++ mtk_hsdma_write(hsdma, HSDMA_REG_INT_MASK, HSDMA_INT_RX_Q0);
++
++ /* enable dma */
++ mtk_hsdma_write(hsdma, HSDMA_REG_GLO_CFG, HSDMA_GLO_DEFAULT);
++
++ /* hardware info */
++ reg = mtk_hsdma_read(hsdma, HSDMA_REG_INFO);
++ dev_info(hsdma->ddev.dev, "rx: %d, tx: %d\n",
++ (reg >> HSDMA_INFO_RX_SHIFT) & HSDMA_INFO_RX_MASK,
++ (reg >> HSDMA_INFO_TX_SHIFT) & HSDMA_INFO_TX_MASK);
++
++ hsdma_dump_reg(hsdma);
++
++ return ret;
++}
++
++static void mtk_hsdma_uninit(struct mtk_hsdam_engine *hsdma)
++{
++ struct mtk_hsdma_chan *chan;
++
++ /* disable dma */
++ mtk_hsdma_write(hsdma, HSDMA_REG_GLO_CFG, 0);
++
++ /* disable intr */
++ mtk_hsdma_write(hsdma, HSDMA_REG_INT_MASK, 0);
++
++ /* free desc */
++ chan = &hsdma->chan[0];
++ mtk_hsdam_free_desc(hsdma, chan);
++
++ /* tx */
++ mtk_hsdma_write(hsdma, HSDMA_REG_TX_BASE, 0);
++ mtk_hsdma_write(hsdma, HSDMA_REG_TX_CNT, 0);
++ /* rx */
++ mtk_hsdma_write(hsdma, HSDMA_REG_RX_BASE, 0);
++ mtk_hsdma_write(hsdma, HSDMA_REG_RX_CNT, 0);
++ /* reset */
++ mtk_hsdma_reset_chan(hsdma, chan);
++}
++
++static const struct of_device_id mtk_hsdma_of_match[] = {
++ { .compatible = "mediatek,mt7621-hsdma" },
++ { },
++};
++
++static int mtk_hsdma_probe(struct platform_device *pdev)
++{
++ const struct of_device_id *match;
++ struct mtk_hsdma_chan *chan;
++ struct mtk_hsdam_engine *hsdma;
++ struct dma_device *dd;
++ struct resource *res;
++ int ret;
++ int irq;
++ void __iomem *base;
++
++ ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
++ if (ret)
++ return ret;
++
++ match = of_match_device(mtk_hsdma_of_match, &pdev->dev);
++ if (!match)
++ return -EINVAL;
++
++ hsdma = devm_kzalloc(&pdev->dev, sizeof(*hsdma), GFP_KERNEL);
++ if (!hsdma) {
++ dev_err(&pdev->dev, "alloc dma device failed\n");
++ return -EINVAL;
++ }
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ base = devm_ioremap_resource(&pdev->dev, res);
++ if (IS_ERR(base))
++ return PTR_ERR(base);
++ hsdma->base = base + HSDMA_BASE_OFFSET;
++ tasklet_init(&hsdma->task, mtk_hsdma_tasklet, (unsigned long)hsdma);
++
++ irq = platform_get_irq(pdev, 0);
++ if (irq < 0) {
++ dev_err(&pdev->dev, "failed to get irq\n");
++ return -EINVAL;
++ }
++ ret = devm_request_irq(&pdev->dev, irq, mtk_hsdma_irq,
++ 0, dev_name(&pdev->dev), hsdma);
++ if (ret) {
++ dev_err(&pdev->dev, "failed to request irq\n");
++ return ret;
++ }
++
++ device_reset(&pdev->dev);
++
++ dd = &hsdma->ddev;
++ dma_cap_set(DMA_MEMCPY, dd->cap_mask);
++ dd->copy_align = HSDMA_ALIGN_SIZE;
++ dd->device_free_chan_resources = mtk_hsdma_free_chan_resources;
++ dd->device_prep_dma_memcpy = mtk_hsdma_prep_dma_memcpy;
++ dd->device_terminate_all = mtk_hsdma_terminate_all;
++ dd->device_tx_status = mtk_hsdma_tx_status;
++ dd->device_issue_pending = mtk_hsdma_issue_pending;
++ dd->dev = &pdev->dev;
++ dd->dev->dma_parms = &hsdma->dma_parms;
++ dma_set_max_seg_size(dd->dev, HSDMA_MAX_PLEN);
++ INIT_LIST_HEAD(&dd->channels);
++
++ chan = &hsdma->chan[0];
++ chan->id = 0;
++ chan->vchan.desc_free = mtk_hsdma_desc_free;
++ vchan_init(&chan->vchan, dd);
++
++ /* init hardware */
++ ret = mtk_hsdma_init(hsdma);
++ if (ret) {
++ dev_err(&pdev->dev, "failed to alloc ring descs\n");
++ return ret;
++ }
++
++ ret = dma_async_device_register(dd);
++ if (ret) {
++ dev_err(&pdev->dev, "failed to register dma device\n");
++ return ret;
++ }
++
++ ret = of_dma_controller_register(pdev->dev.of_node,
++ of_dma_xlate_by_chan_id, hsdma);
++ if (ret) {
++ dev_err(&pdev->dev, "failed to register of dma controller\n");
++ goto err_unregister;
++ }
++
++ platform_set_drvdata(pdev, hsdma);
++
++ return 0;
++
++err_unregister:
++ dma_async_device_unregister(dd);
++ return ret;
++}
++
++static int mtk_hsdma_remove(struct platform_device *pdev)
++{
++ struct mtk_hsdam_engine *hsdma = platform_get_drvdata(pdev);
++
++ mtk_hsdma_uninit(hsdma);
++
++ of_dma_controller_free(pdev->dev.of_node);
++ dma_async_device_unregister(&hsdma->ddev);
++
++ return 0;
++}
++
++static struct platform_driver mtk_hsdma_driver = {
++ .probe = mtk_hsdma_probe,
++ .remove = mtk_hsdma_remove,
++ .driver = {
++ .name = "hsdma-mt7621",
++ .of_match_table = mtk_hsdma_of_match,
++ },
++};
++module_platform_driver(mtk_hsdma_driver);
++
++MODULE_AUTHOR("Michael Lee <igvtee@gmail.com>");
++MODULE_DESCRIPTION("MTK HSDMA driver");
++MODULE_LICENSE("GPL v2");
diff --git a/target/linux/ramips/patches-5.4/0048-asoc-add-mt7620-support.patch b/target/linux/ramips/patches-5.4/0048-asoc-add-mt7620-support.patch
new file mode 100644
index 00000000000..1834e88538f
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0048-asoc-add-mt7620-support.patch
@@ -0,0 +1,1046 @@
+From 7f29222b1731e8182ba94a331531dec18865a1e4 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 27 Jul 2014 09:31:47 +0100
+Subject: [PATCH 48/53] asoc: add mt7620 support
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/ralink/of.c | 2 +
+ sound/soc/Kconfig | 1 +
+ sound/soc/Makefile | 1 +
+ sound/soc/ralink/Kconfig | 15 ++
+ sound/soc/ralink/Makefile | 11 +
+ sound/soc/ralink/mt7620-i2s.c | 436 ++++++++++++++++++++++++++++++++++++++
+ sound/soc/ralink/mt7620-wm8960.c | 233 ++++++++++++++++++++
+ 7 files changed, 699 insertions(+)
+ create mode 100644 sound/soc/ralink/Kconfig
+ create mode 100644 sound/soc/ralink/Makefile
+ create mode 100644 sound/soc/ralink/mt7620-i2s.c
+ create mode 100644 sound/soc/ralink/mt7620-wm8960.c
+
+--- a/arch/mips/ralink/of.c
++++ b/arch/mips/ralink/of.c
+@@ -15,6 +15,7 @@
+ #include <linux/of_fdt.h>
+ #include <linux/kernel.h>
+ #include <linux/bootmem.h>
++#include <linux/module.h>
+ #include <linux/of_platform.h>
+ #include <linux/of_address.h>
+
+@@ -26,6 +27,7 @@
+ #include "common.h"
+
+ __iomem void *rt_sysc_membase;
++EXPORT_SYMBOL(rt_sysc_membase);
+ __iomem void *rt_memc_membase;
+
+ __iomem void *plat_of_remap_node(const char *node)
+--- a/sound/soc/Kconfig
++++ b/sound/soc/Kconfig
+@@ -59,6 +59,7 @@ source "sound/soc/mxs/Kconfig"
+ source "sound/soc/pxa/Kconfig"
+ source "sound/soc/qcom/Kconfig"
+ source "sound/soc/rockchip/Kconfig"
++source "sound/soc/ralink/Kconfig"
+ source "sound/soc/samsung/Kconfig"
+ source "sound/soc/sh/Kconfig"
+ source "sound/soc/sirf/Kconfig"
+--- a/sound/soc/Makefile
++++ b/sound/soc/Makefile
+@@ -40,6 +40,7 @@ obj-$(CONFIG_SND_SOC) += kirkwood/
+ obj-$(CONFIG_SND_SOC) += pxa/
+ obj-$(CONFIG_SND_SOC) += qcom/
+ obj-$(CONFIG_SND_SOC) += rockchip/
++obj-$(CONFIG_SND_SOC) += ralink/
+ obj-$(CONFIG_SND_SOC) += samsung/
+ obj-$(CONFIG_SND_SOC) += sh/
+ obj-$(CONFIG_SND_SOC) += sirf/
+--- /dev/null
++++ b/sound/soc/ralink/Kconfig
+@@ -0,0 +1,8 @@
++config SND_RALINK_SOC_I2S
++ depends on RALINK && SND_SOC && !SOC_RT288X
++ select SND_SOC_GENERIC_DMAENGINE_PCM
++ select REGMAP_MMIO
++ tristate "SoC Audio (I2S protocol) for Ralink SoC"
++ help
++ Say Y if you want to use I2S protocol and I2S codec on Ralink/MediaTek
++ based boards.
+--- /dev/null
++++ b/sound/soc/ralink/Makefile
+@@ -0,0 +1,6 @@
++#
++# Ralink/MediaTek Platform Support
++#
++snd-soc-ralink-i2s-objs := ralink-i2s.o
++
++obj-$(CONFIG_SND_RALINK_SOC_I2S) += snd-soc-ralink-i2s.o
+--- /dev/null
++++ b/sound/soc/ralink/ralink-i2s.c
+@@ -0,0 +1,965 @@
++/*
++ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
++ * Copyright (C) 2016 Michael Lee <igvtee@gmail.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License as published by the
++ * Free Software Foundation; either version 2 of the License, or (at your
++ * option) any later version.
++ *
++ * You should have received a copy of the GNU General Public License along
++ * with this program; if not, write to the Free Software Foundation, Inc.,
++ * 675 Mass Ave, Cambridge, MA 02139, USA.
++ *
++ */
++
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/clk.h>
++#include <linux/regmap.h>
++#include <linux/reset.h>
++#include <linux/debugfs.h>
++#include <linux/of_device.h>
++#include <sound/pcm_params.h>
++#include <sound/dmaengine_pcm.h>
++
++#include <asm/mach-ralink/ralink_regs.h>
++
++#define DRV_NAME "ralink-i2s"
++
++#define I2S_REG_CFG0 0x00
++#define I2S_REG_INT_STATUS 0x04
++#define I2S_REG_INT_EN 0x08
++#define I2S_REG_FF_STATUS 0x0c
++#define I2S_REG_WREG 0x10
++#define I2S_REG_RREG 0x14
++#define I2S_REG_CFG1 0x18
++#define I2S_REG_DIVCMP 0x20
++#define I2S_REG_DIVINT 0x24
++
++/* I2S_REG_CFG0 */
++#define I2S_REG_CFG0_EN BIT(31)
++#define I2S_REG_CFG0_DMA_EN BIT(30)
++#define I2S_REG_CFG0_BYTE_SWAP BIT(28)
++#define I2S_REG_CFG0_TX_EN BIT(24)
++#define I2S_REG_CFG0_RX_EN BIT(20)
++#define I2S_REG_CFG0_SLAVE BIT(16)
++#define I2S_REG_CFG0_RX_THRES 12
++#define I2S_REG_CFG0_TX_THRES 4
++#define I2S_REG_CFG0_THRES_MASK (0xf << I2S_REG_CFG0_RX_THRES) | \
++ (4 << I2S_REG_CFG0_TX_THRES)
++#define I2S_REG_CFG0_DFT_THRES (4 << I2S_REG_CFG0_RX_THRES) | \
++ (4 << I2S_REG_CFG0_TX_THRES)
++/* RT305x */
++#define I2S_REG_CFG0_CLK_DIS BIT(8)
++#define I2S_REG_CFG0_TXCH_SWAP BIT(3)
++#define I2S_REG_CFG0_TXCH1_OFF BIT(2)
++#define I2S_REG_CFG0_TXCH0_OFF BIT(1)
++#define I2S_REG_CFG0_SLAVE_EN BIT(0)
++/* RT3883 */
++#define I2S_REG_CFG0_RXCH_SWAP BIT(11)
++#define I2S_REG_CFG0_RXCH1_OFF BIT(10)
++#define I2S_REG_CFG0_RXCH0_OFF BIT(9)
++#define I2S_REG_CFG0_WS_INV BIT(0)
++/* MT7628 */
++#define I2S_REG_CFG0_FMT_LE BIT(29)
++#define I2S_REG_CFG0_SYS_BE BIT(28)
++#define I2S_REG_CFG0_NORM_24 BIT(18)
++#define I2S_REG_CFG0_DATA_24 BIT(17)
++
++/* I2S_REG_INT_STATUS */
++#define I2S_REG_INT_RX_FAULT BIT(7)
++#define I2S_REG_INT_RX_OVRUN BIT(6)
++#define I2S_REG_INT_RX_UNRUN BIT(5)
++#define I2S_REG_INT_RX_THRES BIT(4)
++#define I2S_REG_INT_TX_FAULT BIT(3)
++#define I2S_REG_INT_TX_OVRUN BIT(2)
++#define I2S_REG_INT_TX_UNRUN BIT(1)
++#define I2S_REG_INT_TX_THRES BIT(0)
++#define I2S_REG_INT_TX_MASK 0xf
++#define I2S_REG_INT_RX_MASK 0xf0
++
++/* I2S_REG_INT_STATUS */
++#define I2S_RX_AVCNT(x) ((x >> 4) & 0xf)
++#define I2S_TX_AVCNT(x) (x & 0xf)
++/* MT7628 */
++#define MT7628_I2S_RX_AVCNT(x) ((x >> 8) & 0x1f)
++#define MT7628_I2S_TX_AVCNT(x) (x & 0x1f)
++
++/* I2S_REG_CFG1 */
++#define I2S_REG_CFG1_LBK BIT(31)
++#define I2S_REG_CFG1_EXTLBK BIT(30)
++/* RT3883 */
++#define I2S_REG_CFG1_LEFT_J BIT(0)
++#define I2S_REG_CFG1_RIGHT_J BIT(1)
++#define I2S_REG_CFG1_FMT_MASK 0x3
++
++/* I2S_REG_DIVCMP */
++#define I2S_REG_DIVCMP_CLKEN BIT(31)
++#define I2S_REG_DIVCMP_DIVCOMP_MASK 0x1ff
++
++/* I2S_REG_DIVINT */
++#define I2S_REG_DIVINT_MASK 0x3ff
++
++/* BCLK dividers */
++#define RALINK_I2S_DIVCMP 0
++#define RALINK_I2S_DIVINT 1
++
++/* FIFO */
++#define RALINK_I2S_FIFO_SIZE 32
++
++/* feature flags */
++#define RALINK_FLAGS_TXONLY BIT(0)
++#define RALINK_FLAGS_LEFT_J BIT(1)
++#define RALINK_FLAGS_RIGHT_J BIT(2)
++#define RALINK_FLAGS_ENDIAN BIT(3)
++#define RALINK_FLAGS_24BIT BIT(4)
++
++#define RALINK_I2S_INT_EN 0
++
++struct ralink_i2s_stats {
++ u32 dmafault;
++ u32 overrun;
++ u32 underrun;
++ u32 belowthres;
++};
++
++struct ralink_i2s {
++ struct device *dev;
++ void __iomem *regs;
++ struct clk *clk;
++ struct regmap *regmap;
++ u32 flags;
++ unsigned int fmt;
++ u16 txdma_req;
++ u16 rxdma_req;
++
++ struct snd_dmaengine_dai_dma_data playback_dma_data;
++ struct snd_dmaengine_dai_dma_data capture_dma_data;
++
++ struct dentry *dbg_dir;
++ struct dentry *dbg_stats;
++ struct ralink_i2s_stats txstats;
++ struct ralink_i2s_stats rxstats;
++};
++
++static void ralink_i2s_dump_regs(struct ralink_i2s *i2s)
++{
++ u32 buf[10];
++ int ret;
++
++ ret = regmap_bulk_read(i2s->regmap, I2S_REG_CFG0,
++ buf, ARRAY_SIZE(buf));
++
++ dev_dbg(i2s->dev, "CFG0: %08x, INTSTAT: %08x, INTEN: %08x, " \
++ "FFSTAT: %08x, WREG: %08x, RREG: %08x, " \
++ "CFG1: %08x, DIVCMP: %08x, DIVINT: %08x\n",
++ buf[0], buf[1], buf[2], buf[3], buf[4],
++ buf[5], buf[6], buf[8], buf[9]);
++}
++
++static int ralink_i2s_set_sysclk(struct snd_soc_dai *dai,
++ int clk_id, unsigned int freq, int dir)
++{
++ return 0;
++}
++
++static int ralink_i2s_set_sys_bclk(struct snd_soc_dai *dai, int width, int rate)
++{
++ struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai);
++ unsigned long clk = clk_get_rate(i2s->clk);
++ int div;
++ uint32_t data;
++
++ /* disable clock at slave mode */
++ if ((i2s->fmt & SND_SOC_DAIFMT_MASTER_MASK) ==
++ SND_SOC_DAIFMT_CBM_CFM) {
++ regmap_update_bits(i2s->regmap, I2S_REG_CFG0,
++ I2S_REG_CFG0_CLK_DIS,
++ I2S_REG_CFG0_CLK_DIS);
++ return 0;
++ }
++
++ /* FREQOUT = FREQIN / (I2S_CLK_DIV + 1) */
++ div = (clk / rate ) - 1;
++
++ data = rt_sysc_r32(0x30);
++ data &= (0xff << 8);
++ data |= (0x1 << 15) | (div << 8);
++ rt_sysc_w32(data, 0x30);
++
++ /* enable clock */
++ regmap_update_bits(i2s->regmap, I2S_REG_CFG0, I2S_REG_CFG0_CLK_DIS, 0);
++
++ dev_dbg(i2s->dev, "clk: %lu, rate: %u, div: %d\n",
++ clk, rate, div);
++
++ return 0;
++}
++
++static int ralink_i2s_set_bclk(struct snd_soc_dai *dai, int width, int rate)
++{
++ struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai);
++ unsigned long clk = clk_get_rate(i2s->clk);
++ int divint, divcomp;
++
++ /* disable clock at slave mode */
++ if ((i2s->fmt & SND_SOC_DAIFMT_MASTER_MASK) ==
++ SND_SOC_DAIFMT_CBM_CFM) {
++ regmap_update_bits(i2s->regmap, I2S_REG_DIVCMP,
++ I2S_REG_DIVCMP_CLKEN, 0);
++ return 0;
++ }
++
++ /* FREQOUT = FREQIN * (1/2) * (1/(DIVINT + DIVCOMP/512)) */
++ clk = clk / (2 * 2 * width);
++ divint = clk / rate;
++ divcomp = ((clk % rate) * 512) / rate;
++
++ if ((divint > I2S_REG_DIVINT_MASK) ||
++ (divcomp > I2S_REG_DIVCMP_DIVCOMP_MASK))
++ return -EINVAL;
++
++ regmap_update_bits(i2s->regmap, I2S_REG_DIVINT,
++ I2S_REG_DIVINT_MASK, divint);
++ regmap_update_bits(i2s->regmap, I2S_REG_DIVCMP,
++ I2S_REG_DIVCMP_DIVCOMP_MASK, divcomp);
++
++ /* enable clock */
++ regmap_update_bits(i2s->regmap, I2S_REG_DIVCMP, I2S_REG_DIVCMP_CLKEN,
++ I2S_REG_DIVCMP_CLKEN);
++
++ dev_dbg(i2s->dev, "clk: %lu, rate: %u, int: %d, comp: %d\n",
++ clk_get_rate(i2s->clk), rate, divint, divcomp);
++
++ return 0;
++}
++
++static int ralink_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
++{
++ struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai);
++ unsigned int cfg0 = 0, cfg1 = 0;
++
++ /* set master/slave audio interface */
++ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
++ case SND_SOC_DAIFMT_CBM_CFM:
++ if (i2s->flags & RALINK_FLAGS_TXONLY)
++ cfg0 |= I2S_REG_CFG0_SLAVE_EN;
++ else
++ cfg0 |= I2S_REG_CFG0_SLAVE;
++ break;
++ case SND_SOC_DAIFMT_CBS_CFS:
++ break;
++ default:
++ return -EINVAL;
++ }
++
++ /* interface format */
++ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
++ case SND_SOC_DAIFMT_I2S:
++ break;
++ case SND_SOC_DAIFMT_RIGHT_J:
++ if (i2s->flags & RALINK_FLAGS_RIGHT_J) {
++ cfg1 |= I2S_REG_CFG1_RIGHT_J;
++ break;
++ }
++ return -EINVAL;
++ case SND_SOC_DAIFMT_LEFT_J:
++ if (i2s->flags & RALINK_FLAGS_LEFT_J) {
++ cfg1 |= I2S_REG_CFG1_LEFT_J;
++ break;
++ }
++ return -EINVAL;
++ default:
++ return -EINVAL;
++ }
++
++ /* clock inversion */
++ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
++ case SND_SOC_DAIFMT_NB_NF:
++ break;
++ default:
++ return -EINVAL;
++ }
++
++ if (i2s->flags & RALINK_FLAGS_TXONLY) {
++ regmap_update_bits(i2s->regmap, I2S_REG_CFG0,
++ I2S_REG_CFG0_SLAVE_EN, cfg0);
++ } else {
++ regmap_update_bits(i2s->regmap, I2S_REG_CFG0,
++ I2S_REG_CFG0_SLAVE, cfg0);
++ }
++ regmap_update_bits(i2s->regmap, I2S_REG_CFG1,
++ I2S_REG_CFG1_FMT_MASK, cfg1);
++ i2s->fmt = fmt;
++
++ return 0;
++}
++
++static int ralink_i2s_startup(struct snd_pcm_substream *substream,
++ struct snd_soc_dai *dai)
++{
++ struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai);
++
++ if (dai->active)
++ return 0;
++
++ /* setup status interrupt */
++#if (RALINK_I2S_INT_EN)
++ regmap_write(i2s->regmap, I2S_REG_INT_EN, 0xff);
++#else
++ regmap_write(i2s->regmap, I2S_REG_INT_EN, 0x0);
++#endif
++
++ /* enable */
++ regmap_update_bits(i2s->regmap, I2S_REG_CFG0,
++ I2S_REG_CFG0_EN | I2S_REG_CFG0_DMA_EN |
++ I2S_REG_CFG0_THRES_MASK,
++ I2S_REG_CFG0_EN | I2S_REG_CFG0_DMA_EN |
++ I2S_REG_CFG0_DFT_THRES);
++
++ return 0;
++}
++
++static void ralink_i2s_shutdown(struct snd_pcm_substream *substream,
++ struct snd_soc_dai *dai)
++{
++ struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai);
++
++ /* If both streams are stopped, disable module and clock */
++ if (dai->active)
++ return;
++
++ /*
++ * datasheet mention when disable all control regs are cleared
++ * to initial values. need reinit at startup.
++ */
++ regmap_update_bits(i2s->regmap, I2S_REG_CFG0, I2S_REG_CFG0_EN, 0);
++}
++
++static int ralink_i2s_hw_params(struct snd_pcm_substream *substream,
++ struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
++{
++ struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai);
++ int width;
++ int ret;
++
++ width = params_width(params);
++ switch (width) {
++ case 16:
++ if (i2s->flags & RALINK_FLAGS_24BIT)
++ regmap_update_bits(i2s->regmap, I2S_REG_CFG0,
++ I2S_REG_CFG0_DATA_24, 0);
++ break;
++ case 24:
++ if (i2s->flags & RALINK_FLAGS_24BIT) {
++ regmap_update_bits(i2s->regmap, I2S_REG_CFG0,
++ I2S_REG_CFG0_DATA_24,
++ I2S_REG_CFG0_DATA_24);
++ break;
++ }
++ return -EINVAL;
++ default:
++ return -EINVAL;
++ }
++
++ switch (params_channels(params)) {
++ case 2:
++ break;
++ default:
++ return -EINVAL;
++ }
++
++ if (i2s->flags & RALINK_FLAGS_ENDIAN) {
++ /* system endian */
++#ifdef SNDRV_LITTLE_ENDIAN
++ regmap_update_bits(i2s->regmap, I2S_REG_CFG0,
++ I2S_REG_CFG0_SYS_BE, 0);
++#else
++ regmap_update_bits(i2s->regmap, I2S_REG_CFG0,
++ I2S_REG_CFG0_SYS_BE,
++ I2S_REG_CFG0_SYS_BE);
++#endif
++
++ /* data endian */
++ switch (params_format(params)) {
++ case SNDRV_PCM_FORMAT_S16_LE:
++ case SNDRV_PCM_FORMAT_S24_LE:
++ regmap_update_bits(i2s->regmap, I2S_REG_CFG0,
++ I2S_REG_CFG0_FMT_LE,
++ I2S_REG_CFG0_FMT_LE);
++ break;
++ case SNDRV_PCM_FORMAT_S16_BE:
++ case SNDRV_PCM_FORMAT_S24_BE:
++ regmap_update_bits(i2s->regmap, I2S_REG_CFG0,
++ I2S_REG_CFG0_FMT_LE, 0);
++ break;
++ default:
++ return -EINVAL;
++ }
++ }
++
++ /* setup bclk rate */
++ if (i2s->flags & RALINK_FLAGS_TXONLY)
++ ret = ralink_i2s_set_sys_bclk(dai, width, params_rate(params));
++ else
++ ret = ralink_i2s_set_bclk(dai, width, params_rate(params));
++
++ return ret;
++}
++
++static int ralink_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
++ struct snd_soc_dai *dai)
++{
++ struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai);
++ unsigned int mask, val;
++
++ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
++ mask = I2S_REG_CFG0_TX_EN;
++ else
++ mask = I2S_REG_CFG0_RX_EN;
++
++ switch (cmd) {
++ case SNDRV_PCM_TRIGGER_START:
++ case SNDRV_PCM_TRIGGER_RESUME:
++ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
++ val = mask;
++ break;
++ case SNDRV_PCM_TRIGGER_STOP:
++ case SNDRV_PCM_TRIGGER_SUSPEND:
++ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
++ val = 0;
++ break;
++ default:
++ return -EINVAL;
++ }
++
++ regmap_update_bits(i2s->regmap, I2S_REG_CFG0, mask, val);
++
++ return 0;
++}
++
++static void ralink_i2s_init_dma_data(struct ralink_i2s *i2s,
++ struct resource *res)
++{
++ struct snd_dmaengine_dai_dma_data *dma_data;
++
++ /* Playback */
++ dma_data = &i2s->playback_dma_data;
++ dma_data->addr = res->start + I2S_REG_WREG;
++ dma_data->addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
++ dma_data->maxburst = 1;
++ dma_data->slave_id = i2s->txdma_req;
++
++ if (i2s->flags & RALINK_FLAGS_TXONLY)
++ return;
++
++ /* Capture */
++ dma_data = &i2s->capture_dma_data;
++ dma_data->addr = res->start + I2S_REG_RREG;
++ dma_data->addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
++ dma_data->maxburst = 1;
++ dma_data->slave_id = i2s->rxdma_req;
++}
++
++static int ralink_i2s_dai_probe(struct snd_soc_dai *dai)
++{
++ struct ralink_i2s *i2s = snd_soc_dai_get_drvdata(dai);
++
++ snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data,
++ &i2s->capture_dma_data);
++
++ return 0;
++}
++
++static int ralink_i2s_dai_remove(struct snd_soc_dai *dai)
++{
++ return 0;
++}
++
++static const struct snd_soc_dai_ops ralink_i2s_dai_ops = {
++ .set_sysclk = ralink_i2s_set_sysclk,
++ .set_fmt = ralink_i2s_set_fmt,
++ .startup = ralink_i2s_startup,
++ .shutdown = ralink_i2s_shutdown,
++ .hw_params = ralink_i2s_hw_params,
++ .trigger = ralink_i2s_trigger,
++};
++
++static struct snd_soc_dai_driver ralink_i2s_dai = {
++ .name = DRV_NAME,
++ .probe = ralink_i2s_dai_probe,
++ .remove = ralink_i2s_dai_remove,
++ .ops = &ralink_i2s_dai_ops,
++ .capture = {
++ .stream_name = "I2S Capture",
++ .channels_min = 2,
++ .channels_max = 2,
++ .rate_min = 5512,
++ .rate_max = 192000,
++ .rates = SNDRV_PCM_RATE_CONTINUOUS,
++ .formats = SNDRV_PCM_FMTBIT_S16_LE,
++ },
++ .playback = {
++ .stream_name = "I2S Playback",
++ .channels_min = 2,
++ .channels_max = 2,
++ .rate_min = 5512,
++ .rate_max = 192000,
++ .rates = SNDRV_PCM_RATE_CONTINUOUS,
++ .formats = SNDRV_PCM_FMTBIT_S16_LE,
++ },
++ .symmetric_rates = 1,
++};
++
++static struct snd_pcm_hardware ralink_pcm_hardware = {
++ .info = SNDRV_PCM_INFO_MMAP |
++ SNDRV_PCM_INFO_MMAP_VALID |
++ SNDRV_PCM_INFO_INTERLEAVED |
++ SNDRV_PCM_INFO_BLOCK_TRANSFER,
++ .formats = SNDRV_PCM_FMTBIT_S16_LE,
++ .channels_min = 2,
++ .channels_max = 2,
++ .period_bytes_min = PAGE_SIZE,
++ .period_bytes_max = PAGE_SIZE * 2,
++ .periods_min = 2,
++ .periods_max = 128,
++ .buffer_bytes_max = 128 * 1024,
++ .fifo_size = RALINK_I2S_FIFO_SIZE,
++};
++
++static const struct snd_dmaengine_pcm_config ralink_dmaengine_pcm_config = {
++ .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
++ .pcm_hardware = &ralink_pcm_hardware,
++ .prealloc_buffer_size = 256 * PAGE_SIZE,
++};
++
++static const struct snd_soc_component_driver ralink_i2s_component = {
++ .name = DRV_NAME,
++};
++
++static bool ralink_i2s_readable_reg(struct device *dev, unsigned int reg)
++{
++ return true;
++}
++
++static bool ralink_i2s_volatile_reg(struct device *dev, unsigned int reg)
++{
++ switch (reg) {
++ case I2S_REG_INT_STATUS:
++ case I2S_REG_FF_STATUS:
++ return true;
++ }
++ return false;
++}
++
++static bool ralink_i2s_writeable_reg(struct device *dev, unsigned int reg)
++{
++ switch (reg) {
++ case I2S_REG_FF_STATUS:
++ case I2S_REG_RREG:
++ return false;
++ }
++ return true;
++}
++
++static const struct regmap_config ralink_i2s_regmap_config = {
++ .reg_bits = 32,
++ .reg_stride = 4,
++ .val_bits = 32,
++ .writeable_reg = ralink_i2s_writeable_reg,
++ .readable_reg = ralink_i2s_readable_reg,
++ .volatile_reg = ralink_i2s_volatile_reg,
++ .max_register = I2S_REG_DIVINT,
++};
++
++#if (RALINK_I2S_INT_EN)
++static irqreturn_t ralink_i2s_irq(int irq, void *devid)
++{
++ struct ralink_i2s *i2s = devid;
++ u32 status;
++
++ regmap_read(i2s->regmap, I2S_REG_INT_STATUS, &status);
++ if (unlikely(!status))
++ return IRQ_NONE;
++
++ /* tx stats */
++ if (status & I2S_REG_INT_TX_MASK) {
++ if (status & I2S_REG_INT_TX_THRES)
++ i2s->txstats.belowthres++;
++ if (status & I2S_REG_INT_TX_UNRUN)
++ i2s->txstats.underrun++;
++ if (status & I2S_REG_INT_TX_OVRUN)
++ i2s->txstats.overrun++;
++ if (status & I2S_REG_INT_TX_FAULT)
++ i2s->txstats.dmafault++;
++ }
++
++ /* rx stats */
++ if (status & I2S_REG_INT_RX_MASK) {
++ if (status & I2S_REG_INT_RX_THRES)
++ i2s->rxstats.belowthres++;
++ if (status & I2S_REG_INT_RX_UNRUN)
++ i2s->rxstats.underrun++;
++ if (status & I2S_REG_INT_RX_OVRUN)
++ i2s->rxstats.overrun++;
++ if (status & I2S_REG_INT_RX_FAULT)
++ i2s->rxstats.dmafault++;
++ }
++
++ /* clean status bits */
++ regmap_write(i2s->regmap, I2S_REG_INT_STATUS, status);
++
++ return IRQ_HANDLED;
++}
++#endif
++
++#if IS_ENABLED(CONFIG_DEBUG_FS)
++static int ralink_i2s_stats_show(struct seq_file *s, void *unused)
++{
++ struct ralink_i2s *i2s = s->private;
++
++ seq_printf(s, "tx stats\n");
++ seq_printf(s, "\tbelow threshold\t%u\n", i2s->txstats.belowthres);
++ seq_printf(s, "\tunder run\t%u\n", i2s->txstats.underrun);
++ seq_printf(s, "\tover run\t%u\n", i2s->txstats.overrun);
++ seq_printf(s, "\tdma fault\t%u\n", i2s->txstats.dmafault);
++
++ seq_printf(s, "rx stats\n");
++ seq_printf(s, "\tbelow threshold\t%u\n", i2s->rxstats.belowthres);
++ seq_printf(s, "\tunder run\t%u\n", i2s->rxstats.underrun);
++ seq_printf(s, "\tover run\t%u\n", i2s->rxstats.overrun);
++ seq_printf(s, "\tdma fault\t%u\n", i2s->rxstats.dmafault);
++
++ ralink_i2s_dump_regs(i2s);
++
++ return 0;
++}
++
++static int ralink_i2s_stats_open(struct inode *inode, struct file *file)
++{
++ return single_open(file, ralink_i2s_stats_show, inode->i_private);
++}
++
++static const struct file_operations ralink_i2s_stats_ops = {
++ .open = ralink_i2s_stats_open,
++ .read = seq_read,
++ .llseek = seq_lseek,
++ .release = single_release,
++};
++
++static inline int ralink_i2s_debugfs_create(struct ralink_i2s *i2s)
++{
++ i2s->dbg_dir = debugfs_create_dir(dev_name(i2s->dev), NULL);
++ if (!i2s->dbg_dir)
++ return -ENOMEM;
++
++ i2s->dbg_stats = debugfs_create_file("stats", S_IRUGO,
++ i2s->dbg_dir, i2s, &ralink_i2s_stats_ops);
++ if (!i2s->dbg_stats) {
++ debugfs_remove(i2s->dbg_dir);
++ return -ENOMEM;
++ }
++
++ return 0;
++}
++
++static inline void ralink_i2s_debugfs_remove(struct ralink_i2s *i2s)
++{
++ debugfs_remove(i2s->dbg_stats);
++ debugfs_remove(i2s->dbg_dir);
++}
++#else
++static inline int ralink_i2s_debugfs_create(struct ralink_i2s *i2s)
++{
++ return 0;
++}
++
++static inline void ralink_i2s_debugfs_remove(struct fsl_ssi_dbg *ssi_dbg)
++{
++}
++#endif
++
++/*
++ * TODO: these refclk setup functions should use
++ * clock framework instead. hardcode it now.
++ */
++static void rt3350_refclk_setup(void)
++{
++ uint32_t data;
++
++ /* set refclk output 12Mhz clock */
++ data = rt_sysc_r32(0x2c);
++ data |= (0x1 << 8);
++ rt_sysc_w32(data, 0x2c);
++}
++
++static void rt3883_refclk_setup(void)
++{
++ uint32_t data;
++
++ /* set refclk output 12Mhz clock */
++ data = rt_sysc_r32(0x2c);
++ data &= ~(0x3 << 13);
++ data |= (0x1 << 13);
++ rt_sysc_w32(data, 0x2c);
++}
++
++static void rt3552_refclk_setup(void)
++{
++ uint32_t data;
++
++ /* set refclk output 12Mhz clock */
++ data = rt_sysc_r32(0x2c);
++ data &= ~(0xf << 8);
++ data |= (0x3 << 8);
++ rt_sysc_w32(data, 0x2c);
++}
++
++static void mt7620_refclk_setup(void)
++{
++ uint32_t data;
++
++ /* set refclk output 12Mhz clock */
++ data = rt_sysc_r32(0x2c);
++ data &= ~(0x7 << 9);
++ data |= 0x1 << 9;
++ rt_sysc_w32(data, 0x2c);
++}
++
++static void mt7621_refclk_setup(void)
++{
++ uint32_t data;
++
++ /* set refclk output 12Mhz clock */
++ data = rt_sysc_r32(0x2c);
++ data &= ~(0x1f << 18);
++ data |= (0x19 << 18);
++ data &= ~(0x1f << 12);
++ data |= (0x1 << 12);
++ data &= ~(0x7 << 9);
++ data |= (0x5 << 9);
++ rt_sysc_w32(data, 0x2c);
++}
++
++static void mt7628_refclk_setup(void)
++{
++ uint32_t data;
++
++ /* set i2s and refclk digital pad */
++ data = rt_sysc_r32(0x3c);
++ data |= 0x1f;
++ rt_sysc_w32(data, 0x3c);
++
++ /* Adjust REFCLK0's driving strength */
++ data = rt_sysc_r32(0x1354);
++ data &= ~(0x1 << 5);
++ rt_sysc_w32(data, 0x1354);
++ data = rt_sysc_r32(0x1364);
++ data |= ~(0x1 << 5);
++ rt_sysc_w32(data, 0x1364);
++
++ /* set refclk output 12Mhz clock */
++ data = rt_sysc_r32(0x2c);
++ data &= ~(0x7 << 9);
++ data |= 0x1 << 9;
++ rt_sysc_w32(data, 0x2c);
++}
++
++struct rt_i2s_data {
++ u32 flags;
++ void (*refclk_setup)(void);
++};
++
++struct rt_i2s_data rt3050_i2s_data = { .flags = RALINK_FLAGS_TXONLY };
++struct rt_i2s_data rt3350_i2s_data = { .flags = RALINK_FLAGS_TXONLY,
++ .refclk_setup = rt3350_refclk_setup };
++struct rt_i2s_data rt3883_i2s_data = {
++ .flags = (RALINK_FLAGS_LEFT_J | RALINK_FLAGS_RIGHT_J),
++ .refclk_setup = rt3883_refclk_setup };
++struct rt_i2s_data rt3352_i2s_data = { .refclk_setup = rt3552_refclk_setup};
++struct rt_i2s_data mt7620_i2s_data = { .refclk_setup = mt7620_refclk_setup};
++struct rt_i2s_data mt7621_i2s_data = { .refclk_setup = mt7621_refclk_setup};
++struct rt_i2s_data mt7628_i2s_data = {
++ .flags = (RALINK_FLAGS_ENDIAN | RALINK_FLAGS_24BIT |
++ RALINK_FLAGS_LEFT_J),
++ .refclk_setup = mt7628_refclk_setup};
++
++static const struct of_device_id ralink_i2s_match_table[] = {
++ { .compatible = "ralink,rt3050-i2s",
++ .data = (void *)&rt3050_i2s_data },
++ { .compatible = "ralink,rt3350-i2s",
++ .data = (void *)&rt3350_i2s_data },
++ { .compatible = "ralink,rt3883-i2s",
++ .data = (void *)&rt3883_i2s_data },
++ { .compatible = "ralink,rt3352-i2s",
++ .data = (void *)&rt3352_i2s_data },
++ { .compatible = "mediatek,mt7620-i2s",
++ .data = (void *)&mt7620_i2s_data },
++ { .compatible = "mediatek,mt7621-i2s",
++ .data = (void *)&mt7621_i2s_data },
++ { .compatible = "mediatek,mt7628-i2s",
++ .data = (void *)&mt7628_i2s_data },
++};
++MODULE_DEVICE_TABLE(of, ralink_i2s_match_table);
++
++static int ralink_i2s_probe(struct platform_device *pdev)
++{
++ const struct of_device_id *match;
++ struct device_node *np = pdev->dev.of_node;
++ struct ralink_i2s *i2s;
++ struct resource *res;
++ int irq, ret;
++ u32 dma_req;
++ struct rt_i2s_data *data;
++
++ i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
++ if (!i2s)
++ return -ENOMEM;
++
++ platform_set_drvdata(pdev, i2s);
++ i2s->dev = &pdev->dev;
++
++ match = of_match_device(ralink_i2s_match_table, &pdev->dev);
++ if (!match)
++ return -EINVAL;
++ data = (struct rt_i2s_data *)match->data;
++ i2s->flags = data->flags;
++ /* setup out 12Mhz refclk to codec as mclk */
++ if (data->refclk_setup)
++ data->refclk_setup();
++
++ if (of_property_read_u32(np, "txdma-req", &dma_req)) {
++ dev_err(&pdev->dev, "no txdma-req define\n");
++ return -EINVAL;
++ }
++ i2s->txdma_req = (u16)dma_req;
++ if (!(i2s->flags & RALINK_FLAGS_TXONLY)) {
++ if (of_property_read_u32(np, "rxdma-req", &dma_req)) {
++ dev_err(&pdev->dev, "no rxdma-req define\n");
++ return -EINVAL;
++ }
++ i2s->rxdma_req = (u16)dma_req;
++ }
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ i2s->regs = devm_ioremap_resource(&pdev->dev, res);
++ if (IS_ERR(i2s->regs))
++ return PTR_ERR(i2s->regs);
++
++ i2s->regmap = devm_regmap_init_mmio(&pdev->dev, i2s->regs,
++ &ralink_i2s_regmap_config);
++ if (IS_ERR(i2s->regmap)) {
++ dev_err(&pdev->dev, "regmap init failed\n");
++ return PTR_ERR(i2s->regmap);
++ }
++
++ irq = platform_get_irq(pdev, 0);
++ if (irq < 0) {
++ dev_err(&pdev->dev, "failed to get irq\n");
++ return -EINVAL;
++ }
++
++#if (RALINK_I2S_INT_EN)
++ ret = devm_request_irq(&pdev->dev, irq, ralink_i2s_irq,
++ 0, dev_name(&pdev->dev), i2s);
++ if (ret) {
++ dev_err(&pdev->dev, "failed to request irq\n");
++ return ret;
++ }
++#endif
++
++ i2s->clk = devm_clk_get(&pdev->dev, NULL);
++ if (IS_ERR(i2s->clk)) {
++ dev_err(&pdev->dev, "no clock defined\n");
++ return PTR_ERR(i2s->clk);
++ }
++
++ ret = clk_prepare_enable(i2s->clk);
++ if (ret)
++ return ret;
++
++ ralink_i2s_init_dma_data(i2s, res);
++
++ device_reset(&pdev->dev);
++
++ ret = ralink_i2s_debugfs_create(i2s);
++ if (ret) {
++ dev_err(&pdev->dev, "create debugfs failed\n");
++ goto err_clk_disable;
++ }
++
++ /* enable 24bits support */
++ if (i2s->flags & RALINK_FLAGS_24BIT) {
++ ralink_i2s_dai.capture.formats |= SNDRV_PCM_FMTBIT_S24_LE;
++ ralink_i2s_dai.playback.formats |= SNDRV_PCM_FMTBIT_S24_LE;
++ }
++
++ /* enable big endian support */
++ if (i2s->flags & RALINK_FLAGS_ENDIAN) {
++ ralink_i2s_dai.capture.formats |= SNDRV_PCM_FMTBIT_S16_BE;
++ ralink_i2s_dai.playback.formats |= SNDRV_PCM_FMTBIT_S16_BE;
++ ralink_pcm_hardware.formats |= SNDRV_PCM_FMTBIT_S16_BE;
++ if (i2s->flags & RALINK_FLAGS_24BIT) {
++ ralink_i2s_dai.capture.formats |=
++ SNDRV_PCM_FMTBIT_S24_BE;
++ ralink_i2s_dai.playback.formats |=
++ SNDRV_PCM_FMTBIT_S24_BE;
++ ralink_pcm_hardware.formats |=
++ SNDRV_PCM_FMTBIT_S24_BE;
++ }
++ }
++
++ /* disable capture support */
++ if (i2s->flags & RALINK_FLAGS_TXONLY)
++ memset(&ralink_i2s_dai.capture, sizeof(ralink_i2s_dai.capture),
++ 0);
++
++ ret = devm_snd_soc_register_component(&pdev->dev, &ralink_i2s_component,
++ &ralink_i2s_dai, 1);
++ if (ret)
++ goto err_debugfs;
++
++ ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
++ &ralink_dmaengine_pcm_config,
++ SND_DMAENGINE_PCM_FLAG_COMPAT);
++ if (ret)
++ goto err_debugfs;
++
++ dev_info(i2s->dev, "mclk %luMHz\n", clk_get_rate(i2s->clk) / 1000000);
++
++ return 0;
++
++err_debugfs:
++ ralink_i2s_debugfs_remove(i2s);
++
++err_clk_disable:
++ clk_disable_unprepare(i2s->clk);
++
++ return ret;
++}
++
++static int ralink_i2s_remove(struct platform_device *pdev)
++{
++ struct ralink_i2s *i2s = platform_get_drvdata(pdev);
++
++ ralink_i2s_debugfs_remove(i2s);
++ clk_disable_unprepare(i2s->clk);
++
++ return 0;
++}
++
++static struct platform_driver ralink_i2s_driver = {
++ .probe = ralink_i2s_probe,
++ .remove = ralink_i2s_remove,
++ .driver = {
++ .name = DRV_NAME,
++ .of_match_table = ralink_i2s_match_table,
++ },
++};
++module_platform_driver(ralink_i2s_driver);
++
++MODULE_AUTHOR("Lars-Peter Clausen, <lars@metafoo.de>");
++MODULE_DESCRIPTION("Ralink/MediaTek I2S driver");
++MODULE_LICENSE("GPL");
++MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/target/linux/ramips/patches-5.4/0051-serial-add-ugly-custom-baud-rate-hack.patch b/target/linux/ramips/patches-5.4/0051-serial-add-ugly-custom-baud-rate-hack.patch
new file mode 100644
index 00000000000..2ad1f6f9f8c
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0051-serial-add-ugly-custom-baud-rate-hack.patch
@@ -0,0 +1,22 @@
+From a7eb46e0ea4a11e4dfb56ab129bf816d1059a6c5 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Mon, 7 Dec 2015 17:31:08 +0100
+Subject: [PATCH 51/53] serial: add ugly custom baud rate hack
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/tty/serial/serial_core.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/drivers/tty/serial/serial_core.c
++++ b/drivers/tty/serial/serial_core.c
+@@ -428,6 +428,9 @@ uart_get_baud_rate(struct uart_port *por
+ break;
+ }
+
++ if (tty_termios_baud_rate(termios) == 2500000)
++ return 250000;
++
+ for (try = 0; try < 2; try++) {
+ baud = tty_termios_baud_rate(termios);
+
diff --git a/target/linux/ramips/patches-5.4/0052-pwm-add-mediatek-support.patch b/target/linux/ramips/patches-5.4/0052-pwm-add-mediatek-support.patch
new file mode 100644
index 00000000000..6eb7f16b9db
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0052-pwm-add-mediatek-support.patch
@@ -0,0 +1,217 @@
+From fc8f96309c21c1bc3276427309cd7d361347d66e Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Mon, 7 Dec 2015 17:16:50 +0100
+Subject: [PATCH 52/53] pwm: add mediatek support
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/pwm/Kconfig | 9 +++
+ drivers/pwm/Makefile | 1 +
+ drivers/pwm/pwm-mediatek.c | 173 ++++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 183 insertions(+)
+ create mode 100644 drivers/pwm/pwm-mediatek.c
+
+--- a/drivers/pwm/Kconfig
++++ b/drivers/pwm/Kconfig
+@@ -302,6 +302,15 @@ config PWM_MEDIATEK
+ To compile this driver as a module, choose M here: the module
+ will be called pwm-mediatek.
+
++config PWM_MEDIATEK_RAMIPS
++ tristate "Mediatek PWM support"
++ depends on RALINK && OF
++ help
++ Generic PWM framework driver for Mediatek ARM SoC.
++
++ To compile this driver as a module, choose M here: the module
++ will be called pwm-mxs.
++
+ config PWM_MXS
+ tristate "Freescale MXS PWM support"
+ depends on ARCH_MXS && OF
+--- a/drivers/pwm/Makefile
++++ b/drivers/pwm/Makefile
+@@ -28,6 +28,7 @@ obj-$(CONFIG_PWM_LPSS_PCI) += pwm-lpss-p
+ obj-$(CONFIG_PWM_LPSS_PLATFORM) += pwm-lpss-platform.o
+ obj-$(CONFIG_PWM_MESON) += pwm-meson.o
+ obj-$(CONFIG_PWM_MEDIATEK) += pwm-mediatek.o
++obj-$(CONFIG_PWM_MEDIATEK_RAMIPS) += pwm-mediatek-ramips.o
+ obj-$(CONFIG_PWM_MTK_DISP) += pwm-mtk-disp.o
+ obj-$(CONFIG_PWM_MXS) += pwm-mxs.o
+ obj-$(CONFIG_PWM_OMAP_DMTIMER) += pwm-omap-dmtimer.o
+--- /dev/null
++++ b/drivers/pwm/pwm-mediatek-ramips.c
+@@ -0,0 +1,173 @@
++/*
++ * Mediatek Pulse Width Modulator driver
++ *
++ * Copyright (C) 2015 John Crispin <blogic@openwrt.org>
++ *
++ * This file is licensed under the terms of the GNU General Public
++ * License version 2. This program is licensed "as is" without any
++ * warranty of any kind, whether express or implied.
++ */
++
++#include <linux/err.h>
++#include <linux/io.h>
++#include <linux/ioport.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/platform_device.h>
++#include <linux/pwm.h>
++#include <linux/slab.h>
++#include <linux/types.h>
++
++#define NUM_PWM 4
++
++/* PWM registers and bits definitions */
++#define PWMCON 0x00
++#define PWMHDUR 0x04
++#define PWMLDUR 0x08
++#define PWMGDUR 0x0c
++#define PWMWAVENUM 0x28
++#define PWMDWIDTH 0x2c
++#define PWMTHRES 0x30
++
++/**
++ * struct mtk_pwm_chip - struct representing pwm chip
++ *
++ * @mmio_base: base address of pwm chip
++ * @chip: linux pwm chip representation
++ */
++struct mtk_pwm_chip {
++ void __iomem *mmio_base;
++ struct pwm_chip chip;
++};
++
++static inline struct mtk_pwm_chip *to_mtk_pwm_chip(struct pwm_chip *chip)
++{
++ return container_of(chip, struct mtk_pwm_chip, chip);
++}
++
++static inline u32 mtk_pwm_readl(struct mtk_pwm_chip *chip, unsigned int num,
++ unsigned long offset)
++{
++ return ioread32(chip->mmio_base + 0x10 + (num * 0x40) + offset);
++}
++
++static inline void mtk_pwm_writel(struct mtk_pwm_chip *chip,
++ unsigned int num, unsigned long offset,
++ unsigned long val)
++{
++ iowrite32(val, chip->mmio_base + 0x10 + (num * 0x40) + offset);
++}
++
++static int mtk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
++ int duty_ns, int period_ns)
++{
++ struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip);
++ u32 resolution = 100 / 4;
++ u32 clkdiv = 0;
++
++ while (period_ns / resolution > 8191) {
++ clkdiv++;
++ resolution *= 2;
++ }
++
++ if (clkdiv > 7)
++ return -1;
++
++ mtk_pwm_writel(pc, pwm->hwpwm, PWMCON, BIT(15) | BIT(3) | clkdiv);
++ mtk_pwm_writel(pc, pwm->hwpwm, PWMDWIDTH, period_ns / resolution);
++ mtk_pwm_writel(pc, pwm->hwpwm, PWMTHRES, duty_ns / resolution);
++ return 0;
++}
++
++static int mtk_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
++{
++ struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip);
++ u32 val;
++
++ val = ioread32(pc->mmio_base);
++ val |= BIT(pwm->hwpwm);
++ iowrite32(val, pc->mmio_base);
++
++ return 0;
++}
++
++static void mtk_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
++{
++ struct mtk_pwm_chip *pc = to_mtk_pwm_chip(chip);
++ u32 val;
++
++ val = ioread32(pc->mmio_base);
++ val &= ~BIT(pwm->hwpwm);
++ iowrite32(val, pc->mmio_base);
++}
++
++static const struct pwm_ops mtk_pwm_ops = {
++ .config = mtk_pwm_config,
++ .enable = mtk_pwm_enable,
++ .disable = mtk_pwm_disable,
++ .owner = THIS_MODULE,
++};
++
++static int mtk_pwm_probe(struct platform_device *pdev)
++{
++ struct mtk_pwm_chip *pc;
++ struct resource *r;
++ int ret;
++
++ pc = devm_kzalloc(&pdev->dev, sizeof(*pc), GFP_KERNEL);
++ if (!pc)
++ return -ENOMEM;
++
++ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ pc->mmio_base = devm_ioremap_resource(&pdev->dev, r);
++ if (IS_ERR(pc->mmio_base))
++ return PTR_ERR(pc->mmio_base);
++
++ platform_set_drvdata(pdev, pc);
++
++ pc->chip.dev = &pdev->dev;
++ pc->chip.ops = &mtk_pwm_ops;
++ pc->chip.base = -1;
++ pc->chip.npwm = NUM_PWM;
++
++ ret = pwmchip_add(&pc->chip);
++ if (ret < 0)
++ dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret);
++
++ return ret;
++}
++
++static int mtk_pwm_remove(struct platform_device *pdev)
++{
++ struct mtk_pwm_chip *pc = platform_get_drvdata(pdev);
++ int i;
++
++ for (i = 0; i < NUM_PWM; i++)
++ pwm_disable(&pc->chip.pwms[i]);
++
++ return pwmchip_remove(&pc->chip);
++}
++
++static const struct of_device_id mtk_pwm_of_match[] = {
++ { .compatible = "mediatek,mt7628-pwm" },
++ { }
++};
++
++MODULE_DEVICE_TABLE(of, mtk_pwm_of_match);
++
++static struct platform_driver mtk_pwm_driver = {
++ .driver = {
++ .name = "mtk-pwm",
++ .owner = THIS_MODULE,
++ .of_match_table = mtk_pwm_of_match,
++ },
++ .probe = mtk_pwm_probe,
++ .remove = mtk_pwm_remove,
++};
++
++module_platform_driver(mtk_pwm_driver);
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
++MODULE_ALIAS("platform:mtk-pwm");
diff --git a/target/linux/ramips/patches-5.4/0053-mtd-spi-nor-add-w25q256-3b-mode-switch.patch b/target/linux/ramips/patches-5.4/0053-mtd-spi-nor-add-w25q256-3b-mode-switch.patch
new file mode 100644
index 00000000000..aa2fb60a2b8
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0053-mtd-spi-nor-add-w25q256-3b-mode-switch.patch
@@ -0,0 +1,214 @@
+mtd: spi-nor: add support for switching between 3-byte and 4-byte addressing on w25q256 flash
+
+On some devices the flash chip needs to be in 3-byte addressing mode during
+reboot, otherwise the boot loader will fail to start.
+This mode however does not allow regular reads/writes onto the upper 16M
+half. W25Q256 has separate read commands for reading from >16M, however
+it does not have any separate write commands.
+This patch changes the code to leave the chip in 3-byte mode most of the
+time and only switch during erase/write cycles that go to >16M
+addresses.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -89,6 +89,10 @@ struct flash_info {
+ #define NO_CHIP_ERASE BIT(12) /* Chip does not support chip erase */
+ #define SPI_NOR_SKIP_SFDP BIT(13) /* Skip parsing of SFDP tables */
+ #define USE_CLSR BIT(14) /* use CLSR command */
++#define SPI_NOR_4B_READ_OP BIT(15) /*
++ * Like SPI_NOR_4B_OPCODES, but for read
++ * op code only.
++ */
+ };
+
+ #define JEDEC_MFR(info) ((info)->id[0])
+@@ -240,6 +244,15 @@ static inline u8 spi_nor_convert_3to4_er
+ ARRAY_SIZE(spi_nor_3to4_erase));
+ }
+
++static void spi_nor_set_4byte_read(struct spi_nor *nor,
++ const struct flash_info *info)
++{
++ nor->addr_width = 3;
++ nor->ext_addr = 0;
++ nor->read_opcode = spi_nor_convert_3to4_read(nor->read_opcode);
++ nor->flags |= SNOR_F_4B_EXT_ADDR;
++}
++
+ static void spi_nor_set_4byte_opcodes(struct spi_nor *nor,
+ const struct flash_info *info)
+ {
+@@ -467,6 +480,36 @@ static int spi_nor_erase_sector(struct s
+ return nor->write_reg(nor, nor->erase_opcode, buf, nor->addr_width);
+ }
+
++static int spi_nor_check_ext_addr(struct spi_nor *nor, u32 addr)
++{
++ bool ext_addr;
++ int ret;
++ u8 cmd;
++
++ if (!(nor->flags & SNOR_F_4B_EXT_ADDR))
++ return 0;
++
++ ext_addr = !!(addr & 0xff000000);
++ if (nor->ext_addr == ext_addr)
++ return 0;
++
++ cmd = ext_addr ? SPINOR_OP_EN4B : SPINOR_OP_EX4B;
++ write_enable(nor);
++ ret = nor->write_reg(nor, cmd, NULL, 0);
++ if (ret)
++ return ret;
++
++ cmd = 0;
++ ret = nor->write_reg(nor, SPINOR_OP_WREAR, &cmd, 1);
++ if (ret)
++ return ret;
++
++ nor->addr_width = 3 + ext_addr;
++ nor->ext_addr = ext_addr;
++ write_disable(nor);
++ return 0;
++}
++
+ /*
+ * Erase an address range on the nor chip. The address range may extend
+ * one or more erase sectors. Return an error is there is a problem erasing.
+@@ -492,6 +535,10 @@ static int spi_nor_erase(struct mtd_info
+ if (ret)
+ return ret;
+
++ ret = spi_nor_check_ext_addr(nor, addr + len);
++ if (ret)
++ return ret;
++
+ /* whole-chip erase? */
+ if (len == mtd->size && !(nor->flags & SNOR_F_NO_OP_CHIP_ERASE)) {
+ unsigned long timeout;
+@@ -542,6 +589,7 @@ static int spi_nor_erase(struct mtd_info
+ write_disable(nor);
+
+ erase_err:
++ spi_nor_check_ext_addr(nor, 0);
+ spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_ERASE);
+
+ instr->state = ret ? MTD_ERASE_FAILED : MTD_ERASE_DONE;
+@@ -834,7 +882,9 @@ static int spi_nor_lock(struct mtd_info
+ if (ret)
+ return ret;
+
++ spi_nor_check_ext_addr(nor, ofs + len);
+ ret = nor->flash_lock(nor, ofs, len);
++ spi_nor_check_ext_addr(nor, 0);
+
+ spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_UNLOCK);
+ return ret;
+@@ -849,7 +899,9 @@ static int spi_nor_unlock(struct mtd_inf
+ if (ret)
+ return ret;
+
++ spi_nor_check_ext_addr(nor, ofs + len);
+ ret = nor->flash_unlock(nor, ofs, len);
++ spi_nor_check_ext_addr(nor, 0);
+
+ spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_LOCK);
+ return ret;
+@@ -1182,7 +1234,7 @@ static const struct flash_info spi_nor_i
+ { "w25q80", INFO(0xef5014, 0, 64 * 1024, 16, SECT_4K) },
+ { "w25q80bl", INFO(0xef4014, 0, 64 * 1024, 16, SECT_4K) },
+ { "w25q128", INFO(0xef4018, 0, 64 * 1024, 256, SECT_4K) },
+- { "w25q256", INFO(0xef4019, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
++ { "w25q256", INFO(0xef4019, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_READ_OP) },
+ { "w25m512jv", INFO(0xef7119, 0, 64 * 1024, 1024,
+ SECT_4K | SPI_NOR_QUAD_READ | SPI_NOR_DUAL_READ) },
+
+@@ -1245,6 +1297,9 @@ static int spi_nor_read(struct mtd_info
+ if (ret)
+ return ret;
+
++ if (nor->flags & SNOR_F_4B_EXT_ADDR)
++ nor->addr_width = 4;
++
+ while (len) {
+ loff_t addr = from;
+
+@@ -1269,6 +1324,18 @@ static int spi_nor_read(struct mtd_info
+ ret = 0;
+
+ read_err:
++ if (nor->flags & SNOR_F_4B_EXT_ADDR) {
++ u8 val = 0;
++
++ if ((from + len) & 0xff000000) {
++ write_enable(nor);
++ nor->write_reg(nor, SPINOR_OP_WREAR, &val, 1);
++ write_disable(nor);
++ }
++
++ nor->addr_width = 3;
++ }
++
+ spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_READ);
+ return ret;
+ }
+@@ -1370,6 +1437,10 @@ static int spi_nor_write(struct mtd_info
+ if (ret)
+ return ret;
+
++ ret = spi_nor_check_ext_addr(nor, to + len);
++ if (ret < 0)
++ return ret;
++
+ for (i = 0; i < len; ) {
+ ssize_t written;
+ loff_t addr = to + i;
+@@ -1410,6 +1481,7 @@ static int spi_nor_write(struct mtd_info
+ }
+
+ write_err:
++ spi_nor_check_ext_addr(nor, 0);
+ spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_WRITE);
+ return ret;
+ }
+@@ -2826,8 +2898,10 @@ int spi_nor_scan(struct spi_nor *nor, co
+ } else if (mtd->size > 0x1000000) {
+ /* enable 4-byte addressing if the device exceeds 16MiB */
+ nor->addr_width = 4;
+- if (JEDEC_MFR(info) == SNOR_MFR_SPANSION ||
+- info->flags & SPI_NOR_4B_OPCODES)
++ if (info->flags & SPI_NOR_4B_READ_OP)
++ spi_nor_set_4byte_read(nor, info);
++ else if (JEDEC_MFR(info) == SNOR_MFR_SPANSION ||
++ info->flags & SPI_NOR_4B_OPCODES)
+ spi_nor_set_4byte_opcodes(nor, info);
+ else
+ set_4byte(nor, info, 1);
+--- a/include/linux/mtd/spi-nor.h
++++ b/include/linux/mtd/spi-nor.h
+@@ -102,6 +102,7 @@
+ /* Used for Macronix and Winbond flashes. */
+ #define SPINOR_OP_EN4B 0xb7 /* Enter 4-byte mode */
+ #define SPINOR_OP_EX4B 0xe9 /* Exit 4-byte mode */
++#define SPINOR_OP_WREAR 0xc5 /* Write extended address register */
+
+ /* Used for Spansion flashes only. */
+ #define SPINOR_OP_BRWR 0x17 /* Bank register write */
+@@ -229,6 +230,7 @@ enum spi_nor_option_flags {
+ SNOR_F_S3AN_ADDR_DEFAULT = BIT(3),
+ SNOR_F_READY_XSR_RDY = BIT(4),
+ SNOR_F_USE_CLSR = BIT(5),
++ SNOR_F_4B_EXT_ADDR = BIT(6),
+ };
+
+ /**
+@@ -280,6 +282,7 @@ struct spi_nor {
+ enum spi_nor_protocol reg_proto;
+ bool sst_write_second;
+ u32 flags;
++ u8 ext_addr;
+ u8 cmd_buf[SPI_NOR_MAX_CMD_SIZE];
+
+ int (*prepare)(struct spi_nor *nor, enum spi_nor_ops ops);
diff --git a/target/linux/ramips/patches-5.4/0054-mtd-spi-nor-w25q256-respect-default-mode.patch b/target/linux/ramips/patches-5.4/0054-mtd-spi-nor-w25q256-respect-default-mode.patch
new file mode 100644
index 00000000000..a6869379897
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0054-mtd-spi-nor-w25q256-respect-default-mode.patch
@@ -0,0 +1,73 @@
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -142,20 +142,29 @@ static int read_fsr(struct spi_nor *nor)
+ * location. Return the configuration register value.
+ * Returns negative if error occurred.
+ */
+-static int read_cr(struct spi_nor *nor)
++static int _read_cr(struct spi_nor *nor, u8 reg)
+ {
+ int ret;
+ u8 val;
+
+- ret = nor->read_reg(nor, SPINOR_OP_RDCR, &val, 1);
++ ret = nor->read_reg(nor, reg, &val, 1);
+ if (ret < 0) {
+- dev_err(nor->dev, "error %d reading CR\n", ret);
++ dev_err(nor->dev, "error %d reading %s\n", ret,
++ (reg==SPINOR_OP_RDCR)?"CR":"XCR");
+ return ret;
+ }
+
+ return val;
+ }
+
++static inline int read_cr(struct spi_nor *nor) {
++ return _read_cr(nor, SPINOR_OP_RDCR);
++}
++
++static inline int read_xcr(struct spi_nor *nor) {
++ return _read_cr(nor, SPINOR_OP_RDXCR);
++}
++
+ /*
+ * Write status register 1 byte
+ * Returns negative if error occurred.
+@@ -2898,9 +2907,16 @@ int spi_nor_scan(struct spi_nor *nor, co
+ } else if (mtd->size > 0x1000000) {
+ /* enable 4-byte addressing if the device exceeds 16MiB */
+ nor->addr_width = 4;
+- if (info->flags & SPI_NOR_4B_READ_OP)
+- spi_nor_set_4byte_read(nor, info);
+- else if (JEDEC_MFR(info) == SNOR_MFR_SPANSION ||
++ if (info->flags & SPI_NOR_4B_READ_OP) {
++ if (JEDEC_MFR(info) == SNOR_MFR_WINBOND) {
++ ret = read_xcr(nor);
++ if (!(ret > 0 && (ret & XCR_DEF_4B_ADDR_MODE)))
++ spi_nor_set_4byte_read(nor, info);
++ else
++ set_4byte(nor, info, 1);
++ } else
++ spi_nor_set_4byte_read(nor, info);
++ } else if (JEDEC_MFR(info) == SNOR_MFR_SPANSION ||
+ info->flags & SPI_NOR_4B_OPCODES)
+ spi_nor_set_4byte_opcodes(nor, info);
+ else
+--- a/include/linux/mtd/spi-nor.h
++++ b/include/linux/mtd/spi-nor.h
+@@ -103,6 +103,7 @@
+ #define SPINOR_OP_EN4B 0xb7 /* Enter 4-byte mode */
+ #define SPINOR_OP_EX4B 0xe9 /* Exit 4-byte mode */
+ #define SPINOR_OP_WREAR 0xc5 /* Write extended address register */
++#define SPINOR_OP_RDXCR 0x15 /* Read extended configuration register */
+
+ /* Used for Spansion flashes only. */
+ #define SPINOR_OP_BRWR 0x17 /* Bank register write */
+@@ -135,6 +136,7 @@
+
+ /* Configuration Register bits. */
+ #define CR_QUAD_EN_SPAN BIT(1) /* Spansion Quad I/O */
++#define XCR_DEF_4B_ADDR_MODE BIT(1) /* Winbond 4B mode default */
+
+ /* Status Register 2 bits. */
+ #define SR2_QUAD_EN_BIT7 BIT(7)
diff --git a/target/linux/ramips/patches-5.4/0069-awake-rt305x-dwc2-controller.patch b/target/linux/ramips/patches-5.4/0069-awake-rt305x-dwc2-controller.patch
new file mode 100644
index 00000000000..0e09e1d4e0d
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0069-awake-rt305x-dwc2-controller.patch
@@ -0,0 +1,15 @@
+--- a/drivers/usb/dwc2/platform.c
++++ b/drivers/usb/dwc2/platform.c
+@@ -406,6 +406,12 @@ static int dwc2_driver_probe(struct plat
+ if (retval)
+ return retval;
+
++ /* Enable USB port before any regs access */
++ if (dwc2_readl(hsotg->regs + PCGCTL) & 0x0f) {
++ dwc2_writel(0x00, hsotg->regs + PCGCTL);
++ /* TODO: mdelay(25) here? vendor driver don't use it */
++ }
++
+ retval = dwc2_get_dr_mode(hsotg);
+ if (retval)
+ goto error;
diff --git a/target/linux/ramips/patches-5.4/0070-weak_reordering.patch b/target/linux/ramips/patches-5.4/0070-weak_reordering.patch
new file mode 100644
index 00000000000..52e6641324f
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0070-weak_reordering.patch
@@ -0,0 +1,10 @@
+--- a/arch/mips/ralink/Kconfig
++++ b/arch/mips/ralink/Kconfig
+@@ -58,6 +58,7 @@ choice
+ select COMMON_CLK
+ select CLKSRC_MIPS_GIC
+ select HW_HAS_PCI
++ select WEAK_REORDERING_BEYOND_LLSC
+ endchoice
+
+ choice
diff --git a/target/linux/ramips/patches-5.4/0098-disable_cm.patch b/target/linux/ramips/patches-5.4/0098-disable_cm.patch
new file mode 100644
index 00000000000..bc00619dff0
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0098-disable_cm.patch
@@ -0,0 +1,19 @@
+--- a/arch/mips/kernel/mips-cm.c
++++ b/arch/mips/kernel/mips-cm.c
+@@ -237,6 +237,7 @@ int mips_cm_probe(void)
+
+ /* disable CM regions */
+ write_gcr_reg0_base(CM_GCR_REGn_BASE_BASEADDR);
++ /*
+ write_gcr_reg0_mask(CM_GCR_REGn_MASK_ADDRMASK);
+ write_gcr_reg1_base(CM_GCR_REGn_BASE_BASEADDR);
+ write_gcr_reg1_mask(CM_GCR_REGn_MASK_ADDRMASK);
+@@ -244,7 +245,7 @@ int mips_cm_probe(void)
+ write_gcr_reg2_mask(CM_GCR_REGn_MASK_ADDRMASK);
+ write_gcr_reg3_base(CM_GCR_REGn_BASE_BASEADDR);
+ write_gcr_reg3_mask(CM_GCR_REGn_MASK_ADDRMASK);
+-
++*/
+ /* probe for an L2-only sync region */
+ mips_cm_probe_l2sync();
+
diff --git a/target/linux/ramips/patches-5.4/0099-pci-mt7620.patch b/target/linux/ramips/patches-5.4/0099-pci-mt7620.patch
new file mode 100644
index 00000000000..997fb6a2b3b
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0099-pci-mt7620.patch
@@ -0,0 +1,10 @@
+--- a/arch/mips/pci/pci-mt7620.c
++++ b/arch/mips/pci/pci-mt7620.c
+@@ -33,7 +33,6 @@
+ #define RALINK_GPIOMODE 0x60
+
+ #define PPLL_CFG1 0x9c
+-#define PDRV_SW_SET BIT(23)
+
+ #define PPLL_DRV 0xa0
+ #define PDRV_SW_SET (1<<31)
diff --git a/target/linux/ramips/patches-5.4/0200-linkit_bootstrap.patch b/target/linux/ramips/patches-5.4/0200-linkit_bootstrap.patch
new file mode 100644
index 00000000000..cd1462fbcff
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/0200-linkit_bootstrap.patch
@@ -0,0 +1,97 @@
+--- a/drivers/misc/Makefile
++++ b/drivers/misc/Makefile
+@@ -56,6 +56,7 @@ obj-$(CONFIG_CXL_BASE) += cxl/
+ obj-$(CONFIG_ASPEED_LPC_CTRL) += aspeed-lpc-ctrl.o
+ obj-$(CONFIG_ASPEED_LPC_SNOOP) += aspeed-lpc-snoop.o
+ obj-$(CONFIG_PCI_ENDPOINT_TEST) += pci_endpoint_test.o
++obj-$(CONFIG_SOC_MT7620) += linkit.o
+
+ lkdtm-$(CONFIG_LKDTM) += lkdtm_core.o
+ lkdtm-$(CONFIG_LKDTM) += lkdtm_bugs.o
+--- /dev/null
++++ b/drivers/misc/linkit.c
+@@ -0,0 +1,84 @@
++/*
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * publishhed by the Free Software Foundation.
++ *
++ * Copyright (C) 2015 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/of.h>
++#include <linux/mtd/mtd.h>
++#include <linux/gpio.h>
++
++#define LINKIT_LATCH_GPIO 11
++
++struct linkit_hw_data {
++ char board[16];
++ char rev[16];
++};
++
++static void sanify_string(char *s)
++{
++ int i;
++
++ for (i = 0; i < 15; i++)
++ if (s[i] <= 0x20)
++ s[i] = '\0';
++ s[15] = '\0';
++}
++
++static int linkit_probe(struct platform_device *pdev)
++{
++ struct linkit_hw_data hw;
++ struct mtd_info *mtd;
++ size_t retlen;
++ int ret;
++
++ mtd = get_mtd_device_nm("factory");
++ if (IS_ERR(mtd))
++ return PTR_ERR(mtd);
++
++ ret = mtd_read(mtd, 0x400, sizeof(hw), &retlen, (u_char *) &hw);
++ put_mtd_device(mtd);
++
++ sanify_string(hw.board);
++ sanify_string(hw.rev);
++
++ dev_info(&pdev->dev, "Version : %s\n", hw.board);
++ dev_info(&pdev->dev, "Revision : %s\n", hw.rev);
++
++ if (!strcmp(hw.board, "LINKITS7688")) {
++ dev_info(&pdev->dev, "setting up bootstrap latch\n");
++
++ if (devm_gpio_request(&pdev->dev, LINKIT_LATCH_GPIO, "bootstrap")) {
++ dev_err(&pdev->dev, "failed to setup bootstrap gpio\n");
++ return -1;
++ }
++ gpio_direction_output(LINKIT_LATCH_GPIO, 0);
++ }
++
++ return 0;
++}
++
++static const struct of_device_id linkit_match[] = {
++ { .compatible = "mediatek,linkit" },
++ {},
++};
++MODULE_DEVICE_TABLE(of, linkit_match);
++
++static struct platform_driver linkit_driver = {
++ .probe = linkit_probe,
++ .driver = {
++ .name = "mtk-linkit",
++ .owner = THIS_MODULE,
++ .of_match_table = linkit_match,
++ },
++};
++
++int __init linkit_init(void)
++{
++ return platform_driver_register(&linkit_driver);
++}
++late_initcall_sync(linkit_init);
diff --git a/target/linux/ramips/patches-5.4/100-mt7621-core-detect-hack.patch b/target/linux/ramips/patches-5.4/100-mt7621-core-detect-hack.patch
new file mode 100644
index 00000000000..991e19b6dfb
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/100-mt7621-core-detect-hack.patch
@@ -0,0 +1,61 @@
+There is a variant of MT7621 which contains only one CPU core instead of 2.
+This is not reflected in the config register, so the kernel detects more
+physical cores, which leads to a hang on SMP bringup.
+Add a hack to detect missing cores.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+
+--- a/arch/mips/kernel/smp-cps.c
++++ b/arch/mips/kernel/smp-cps.c
+@@ -47,6 +47,11 @@ static unsigned core_vpe_count(unsigned
+ return mips_cps_numvps(cluster, core);
+ }
+
++bool __weak plat_cpu_core_present(int core)
++{
++ return true;
++}
++
+ static void __init cps_smp_setup(void)
+ {
+ unsigned int nclusters, ncores, nvpes, core_vpes;
+@@ -64,6 +69,8 @@ static void __init cps_smp_setup(void)
+
+ ncores = mips_cps_numcores(cl);
+ for (c = 0; c < ncores; c++) {
++ if (!plat_cpu_core_present(c))
++ continue;
+ core_vpes = core_vpe_count(cl, c);
+
+ if (c > 0)
+--- a/arch/mips/ralink/mt7621.c
++++ b/arch/mips/ralink/mt7621.c
+@@ -15,6 +15,7 @@
+ #include <asm/mips-cps.h>
+ #include <asm/mach-ralink/ralink_regs.h>
+ #include <asm/mach-ralink/mt7621.h>
++#include <asm/mips-boards/launch.h>
+
+ #include <pinmux.h>
+
+@@ -162,6 +163,20 @@ void __init ralink_of_remap(void)
+ panic("Failed to remap core resources");
+ }
+
++bool plat_cpu_core_present(int core)
++{
++ struct cpulaunch *launch = (struct cpulaunch *)CKSEG0ADDR(CPULAUNCH);
++
++ if (!core)
++ return true;
++ launch += core * 2; /* 2 VPEs per core */
++ if (!(launch->flags & LAUNCH_FREADY))
++ return false;
++ if (launch->flags & (LAUNCH_FGO | LAUNCH_FGONE))
++ return false;
++ return true;
++}
++
+ void prom_soc_init(struct ralink_soc_info *soc_info)
+ {
+ void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7621_SYSC_BASE);
diff --git a/target/linux/ramips/patches-5.4/101-mt7621-timer.patch b/target/linux/ramips/patches-5.4/101-mt7621-timer.patch
new file mode 100644
index 00000000000..10edafd412e
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/101-mt7621-timer.patch
@@ -0,0 +1,87 @@
+--- a/arch/mips/ralink/mt7621.c
++++ b/arch/mips/ralink/mt7621.c
+@@ -9,6 +9,7 @@
+
+ #include <linux/kernel.h>
+ #include <linux/init.h>
++#include <linux/jiffies.h>
+
+ #include <asm/mipsregs.h>
+ #include <asm/smp-ops.h>
+@@ -16,6 +17,7 @@
+ #include <asm/mach-ralink/ralink_regs.h>
+ #include <asm/mach-ralink/mt7621.h>
+ #include <asm/mips-boards/launch.h>
++#include <asm/delay.h>
+
+ #include <pinmux.h>
+
+@@ -177,6 +179,58 @@ bool plat_cpu_core_present(int core)
+ return true;
+ }
+
++#define LPS_PREC 8
++/*
++* Re-calibration lpj(loop-per-jiffy).
++* (derived from kernel/calibrate.c)
++*/
++static int udelay_recal(void)
++{
++ unsigned int i, lpj = 0;
++ unsigned long ticks, loopbit;
++ int lps_precision = LPS_PREC;
++
++ lpj = (1<<12);
++
++ while ((lpj <<= 1) != 0) {
++ /* wait for "start of" clock tick */
++ ticks = jiffies;
++ while (ticks == jiffies)
++ /* nothing */;
++
++ /* Go .. */
++ ticks = jiffies;
++ __delay(lpj);
++ ticks = jiffies - ticks;
++ if (ticks)
++ break;
++ }
++
++ /*
++ * Do a binary approximation to get lpj set to
++ * equal one clock (up to lps_precision bits)
++ */
++ lpj >>= 1;
++ loopbit = lpj;
++ while (lps_precision-- && (loopbit >>= 1)) {
++ lpj |= loopbit;
++ ticks = jiffies;
++ while (ticks == jiffies)
++ /* nothing */;
++ ticks = jiffies;
++ __delay(lpj);
++ if (jiffies != ticks) /* longer than 1 tick */
++ lpj &= ~loopbit;
++ }
++ printk(KERN_INFO "%d CPUs re-calibrate udelay(lpj = %d)\n", NR_CPUS, lpj);
++
++ for(i=0; i< NR_CPUS; i++)
++ cpu_data[i].udelay_val = lpj;
++
++ return 0;
++}
++device_initcall(udelay_recal);
++
+ void prom_soc_init(struct ralink_soc_info *soc_info)
+ {
+ void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7621_SYSC_BASE);
+--- a/arch/mips/ralink/Kconfig
++++ b/arch/mips/ralink/Kconfig
+@@ -59,6 +59,7 @@ choice
+ select CLKSRC_MIPS_GIC
+ select HW_HAS_PCI
+ select WEAK_REORDERING_BEYOND_LLSC
++ select GENERIC_CLOCKEVENTS_BROADCAST
+ endchoice
+
+ choice
diff --git a/target/linux/ramips/patches-5.4/102-mt7621-fix-cpu-clk-add-clkdev.patch b/target/linux/ramips/patches-5.4/102-mt7621-fix-cpu-clk-add-clkdev.patch
new file mode 100644
index 00000000000..e647a2f4c82
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/102-mt7621-fix-cpu-clk-add-clkdev.patch
@@ -0,0 +1,224 @@
+--- a/arch/mips/include/asm/mach-ralink/mt7621.h
++++ b/arch/mips/include/asm/mach-ralink/mt7621.h
+@@ -19,6 +19,10 @@
+ #define SYSC_REG_CHIP_REV 0x0c
+ #define SYSC_REG_SYSTEM_CONFIG0 0x10
+ #define SYSC_REG_SYSTEM_CONFIG1 0x14
++#define SYSC_REG_CLKCFG0 0x2c
++#define SYSC_REG_CUR_CLK_STS 0x44
++
++#define MEMC_REG_CPU_PLL 0x648
+
+ #define CHIP_REV_PKG_MASK 0x1
+ #define CHIP_REV_PKG_SHIFT 16
+@@ -26,6 +30,22 @@
+ #define CHIP_REV_VER_SHIFT 8
+ #define CHIP_REV_ECO_MASK 0xf
+
++#define XTAL_MODE_SEL_MASK 0x7
++#define XTAL_MODE_SEL_SHIFT 6
++
++#define CPU_CLK_SEL_MASK 0x3
++#define CPU_CLK_SEL_SHIFT 30
++
++#define CUR_CPU_FDIV_MASK 0x1f
++#define CUR_CPU_FDIV_SHIFT 8
++#define CUR_CPU_FFRAC_MASK 0x1f
++#define CUR_CPU_FFRAC_SHIFT 0
++
++#define CPU_PLL_PREDIV_MASK 0x3
++#define CPU_PLL_PREDIV_SHIFT 12
++#define CPU_PLL_FBDIV_MASK 0x7f
++#define CPU_PLL_FBDIV_SHIFT 4
++
+ #define MT7621_DRAM_BASE 0x0
+ #define MT7621_DDR2_SIZE_MIN 32
+ #define MT7621_DDR2_SIZE_MAX 256
+--- a/arch/mips/ralink/mt7621.c
++++ b/arch/mips/ralink/mt7621.c
+@@ -10,6 +10,10 @@
+ #include <linux/kernel.h>
+ #include <linux/init.h>
+ #include <linux/jiffies.h>
++#include <linux/clk.h>
++#include <linux/clkdev.h>
++#include <linux/clk-provider.h>
++#include <dt-bindings/clock/mt7621-clk.h>
+
+ #include <asm/mipsregs.h>
+ #include <asm/smp-ops.h>
+@@ -18,16 +22,12 @@
+ #include <asm/mach-ralink/mt7621.h>
+ #include <asm/mips-boards/launch.h>
+ #include <asm/delay.h>
++#include <asm/time.h>
+
+ #include <pinmux.h>
+
+ #include "common.h"
+
+-#define SYSC_REG_SYSCFG 0x10
+-#define SYSC_REG_CPLL_CLKCFG0 0x2c
+-#define SYSC_REG_CUR_CLK_STS 0x44
+-#define CPU_CLK_SEL (BIT(30) | BIT(31))
+-
+ #define MT7621_GPIO_MODE_UART1 1
+ #define MT7621_GPIO_MODE_I2C 2
+ #define MT7621_GPIO_MODE_UART3_MASK 0x3
+@@ -113,49 +113,89 @@ static struct rt2880_pmx_group mt7621_pi
+ { 0 }
+ };
+
++static struct clk *clks[MT7621_CLK_MAX];
++static struct clk_onecell_data clk_data = {
++ .clks = clks,
++ .clk_num = ARRAY_SIZE(clks),
++};
++
+ phys_addr_t mips_cpc_default_phys_base(void)
+ {
+ panic("Cannot detect cpc address");
+ }
+
+-void __init ralink_clk_init(void)
++static struct clk *__init mt7621_add_sys_clkdev(
++ const char *id, unsigned long rate)
+ {
+- int cpu_fdiv = 0;
+- int cpu_ffrac = 0;
+- int fbdiv = 0;
+- u32 clk_sts, syscfg;
+- u8 clk_sel = 0, xtal_mode;
+- u32 cpu_clk;
++ struct clk *clk;
++ int err;
++
++ clk = clk_register_fixed_rate(NULL, id, NULL, 0, rate);
++ if (IS_ERR(clk))
++ panic("failed to allocate %s clock structure", id);
++
++ err = clk_register_clkdev(clk, id, NULL);
++ if (err)
++ panic("unable to register %s clock device", id);
+
+- if ((rt_sysc_r32(SYSC_REG_CPLL_CLKCFG0) & CPU_CLK_SEL) != 0)
+- clk_sel = 1;
++ return clk;
++}
++
++void __init ralink_clk_init(void)
++{
++ u32 syscfg, xtal_sel, clkcfg, clk_sel, curclk, ffiv, ffrac;
++ u32 pll, prediv, fbdiv;
++ u32 xtal_clk, cpu_clk, bus_clk;
++ const static u32 prediv_tbl[] = {0, 1, 2, 2};
++
++ syscfg = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG0);
++ xtal_sel = (syscfg >> XTAL_MODE_SEL_SHIFT) & XTAL_MODE_SEL_MASK;
++
++ clkcfg = rt_sysc_r32(SYSC_REG_CLKCFG0);
++ clk_sel = (clkcfg >> CPU_CLK_SEL_SHIFT) & CPU_CLK_SEL_MASK;
++
++ curclk = rt_sysc_r32(SYSC_REG_CUR_CLK_STS);
++ ffiv = (curclk >> CUR_CPU_FDIV_SHIFT) & CUR_CPU_FDIV_MASK;
++ ffrac = (curclk >> CUR_CPU_FFRAC_SHIFT) & CUR_CPU_FFRAC_MASK;
++
++ if (xtal_sel <= 2)
++ xtal_clk = 20 * 1000 * 1000;
++ else if (xtal_sel <= 5)
++ xtal_clk = 40 * 1000 * 1000;
++ else
++ xtal_clk = 25 * 1000 * 1000;
+
+ switch (clk_sel) {
+ case 0:
+- clk_sts = rt_sysc_r32(SYSC_REG_CUR_CLK_STS);
+- cpu_fdiv = ((clk_sts >> 8) & 0x1F);
+- cpu_ffrac = (clk_sts & 0x1F);
+- cpu_clk = (500 * cpu_ffrac / cpu_fdiv) * 1000 * 1000;
++ cpu_clk = 500 * 1000 * 1000;
+ break;
+-
+ case 1:
+- fbdiv = ((rt_sysc_r32(0x648) >> 4) & 0x7F) + 1;
+- syscfg = rt_sysc_r32(SYSC_REG_SYSCFG);
+- xtal_mode = (syscfg >> 6) & 0x7;
+- if (xtal_mode >= 6) {
+- /* 25Mhz Xtal */
+- cpu_clk = 25 * fbdiv * 1000 * 1000;
+- } else if (xtal_mode >= 3) {
+- /* 40Mhz Xtal */
+- cpu_clk = 40 * fbdiv * 1000 * 1000;
+- } else {
+- /* 20Mhz Xtal */
+- cpu_clk = 20 * fbdiv * 1000 * 1000;
+- }
++ pll = rt_memc_r32(MEMC_REG_CPU_PLL);
++ fbdiv = (pll >> CPU_PLL_FBDIV_SHIFT) & CPU_PLL_FBDIV_MASK;
++ prediv = (pll >> CPU_PLL_PREDIV_SHIFT) & CPU_PLL_PREDIV_MASK;
++ cpu_clk = ((fbdiv + 1) * xtal_clk) >> prediv_tbl[prediv];
+ break;
++ default:
++ cpu_clk = xtal_clk;
+ }
++
++ cpu_clk = cpu_clk / ffiv * ffrac;
++ bus_clk = cpu_clk / 4;
++
++ clks[MT7621_CLK_CPU] = mt7621_add_sys_clkdev("cpu", cpu_clk);
++ clks[MT7621_CLK_BUS] = mt7621_add_sys_clkdev("bus", bus_clk);
++
++ pr_info("CPU Clock: %dMHz\n", cpu_clk / 1000000);
++ mips_hpt_frequency = cpu_clk / 2;
+ }
+
++static void __init mt7621_clocks_init_dt(struct device_node *np)
++{
++ of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
++}
++
++CLK_OF_DECLARE(ar7100, "mediatek,mt7621-pll", mt7621_clocks_init_dt);
++
+ void __init ralink_of_remap(void)
+ {
+ rt_sysc_membase = plat_of_remap_node("mtk,mt7621-sysc");
+--- a/arch/mips/ralink/timer-gic.c
++++ b/arch/mips/ralink/timer-gic.c
+@@ -11,14 +11,14 @@
+
+ #include <linux/of.h>
+ #include <linux/clk-provider.h>
+-#include <linux/clocksource.h>
++#include <asm/time.h>
+
+ #include "common.h"
+
+ void __init plat_time_init(void)
+ {
+ ralink_of_remap();
+-
++ ralink_clk_init();
+ of_clk_init(NULL);
+ timer_probe();
+ }
+--- /dev/null
++++ b/include/dt-bindings/clock/mt7621-clk.h
+@@ -0,0 +1,18 @@
++/*
++ * Copyright (C) 2018 Weijie Gao <hackpascal@gmail.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ */
++
++#ifndef __DT_BINDINGS_MT7621_CLK_H
++#define __DT_BINDINGS_MT7621_CLK_H
++
++#define MT7621_CLK_CPU 0
++#define MT7621_CLK_BUS 1
++
++#define MT7621_CLK_MAX 2
++
++#endif /* __DT_BINDINGS_MT7621_CLK_H */
diff --git a/target/linux/ramips/patches-5.4/105-mt7621-memory-detect.patch b/target/linux/ramips/patches-5.4/105-mt7621-memory-detect.patch
new file mode 100644
index 00000000000..b19b57fd669
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/105-mt7621-memory-detect.patch
@@ -0,0 +1,125 @@
+From b5a52351a66f3c2a7a207548aa87d78ff2d336c0 Mon Sep 17 00:00:00 2001
+From: Chuanhong Guo <gch981213@gmail.com>
+Date: Wed, 10 Jul 2019 00:24:48 +0800
+Subject: [PATCH] MIPS: ralink: mt7621: add memory detection support
+
+mt7621 has the following memory map:
+0x0-0x1c000000: lower 448m memory
+0x1c000000-0x2000000: peripheral registers
+0x20000000-0x2400000: higher 64m memory
+
+detect_memory_region in arch/mips/kernel/setup.c only add the first
+memory region and isn't suitable for 512m memory detection because
+it may accidentally read the memory area for peripheral registers.
+
+This commit adds memory detection capability for mt7621:
+1. add the highmem area when 512m is detected.
+2. guard memcmp from accessing peripheral registers:
+ This only happens when some weird user decided to change
+ kernel load address to 256m or higher address. Since this
+ is a quite unusual case, we just skip 512m testing and return
+ 256m as memory size.
+
+Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
+---
+ arch/mips/include/asm/mach-ralink/mt7621.h | 7 ++---
+ arch/mips/ralink/mt7621.c | 30 +++++++++++++++++++---
+ 2 files changed, 30 insertions(+), 7 deletions(-)
+
+--- a/arch/mips/include/asm/mach-ralink/mt7621.h
++++ b/arch/mips/include/asm/mach-ralink/mt7621.h
+@@ -46,9 +46,10 @@
+ #define CPU_PLL_FBDIV_MASK 0x7f
+ #define CPU_PLL_FBDIV_SHIFT 4
+
+-#define MT7621_DRAM_BASE 0x0
+-#define MT7621_DDR2_SIZE_MIN 32
+-#define MT7621_DDR2_SIZE_MAX 256
++#define MT7621_LOWMEM_BASE 0x0
++#define MT7621_LOWMEM_MAX_SIZE 0x1C000000
++#define MT7621_HIGHMEM_BASE 0x20000000
++#define MT7621_HIGHMEM_SIZE 0x4000000
+
+ #define MT7621_CHIP_NAME0 0x3637544D
+ #define MT7621_CHIP_NAME1 0x20203132
+--- a/arch/mips/ralink/mt7621.c
++++ b/arch/mips/ralink/mt7621.c
+@@ -15,6 +15,7 @@
+ #include <linux/clk-provider.h>
+ #include <dt-bindings/clock/mt7621-clk.h>
+
++#include <asm/bootinfo.h>
+ #include <asm/mipsregs.h>
+ #include <asm/smp-ops.h>
+ #include <asm/mips-cps.h>
+@@ -57,6 +58,8 @@
+ #define MT7621_GPIO_MODE_SDHCI_SHIFT 18
+ #define MT7621_GPIO_MODE_SDHCI_GPIO 1
+
++static void *detect_magic __initdata = detect_memory_region;
++
+ static struct rt2880_pmx_func uart1_grp[] = { FUNC("uart1", 0, 1, 2) };
+ static struct rt2880_pmx_func i2c_grp[] = { FUNC("i2c", 0, 3, 2) };
+ static struct rt2880_pmx_func uart3_grp[] = {
+@@ -141,6 +144,28 @@ static struct clk *__init mt7621_add_sys
+ return clk;
+ }
+
++void __init mt7621_memory_detect(void)
++{
++ void *dm = &detect_magic;
++ phys_addr_t size;
++
++ for (size = 32 * SZ_1M; size < 256 * SZ_1M; size <<= 1) {
++ if (!memcmp(dm, dm + size, sizeof(detect_magic)))
++ break;
++ }
++
++ if ((size == 256 * SZ_1M) &&
++ (CPHYSADDR(dm + size) < MT7621_LOWMEM_MAX_SIZE) &&
++ memcmp(dm, dm + size, sizeof(detect_magic))) {
++ add_memory_region(MT7621_LOWMEM_BASE, MT7621_LOWMEM_MAX_SIZE,
++ BOOT_MEM_RAM);
++ add_memory_region(MT7621_HIGHMEM_BASE, MT7621_HIGHMEM_SIZE,
++ BOOT_MEM_RAM);
++ } else {
++ add_memory_region(MT7621_LOWMEM_BASE, size, BOOT_MEM_RAM);
++ }
++}
++
+ void __init ralink_clk_init(void)
+ {
+ u32 syscfg, xtal_sel, clkcfg, clk_sel, curclk, ffiv, ffrac;
+@@ -319,10 +344,7 @@ void prom_soc_init(struct ralink_soc_inf
+ (rev >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK,
+ (rev & CHIP_REV_ECO_MASK));
+
+- soc_info->mem_size_min = MT7621_DDR2_SIZE_MIN;
+- soc_info->mem_size_max = MT7621_DDR2_SIZE_MAX;
+- soc_info->mem_base = MT7621_DRAM_BASE;
+-
++ soc_info->mem_detect = mt7621_memory_detect;
+ rt2880_pinmux_data = mt7621_pinmux_data;
+
+
+--- a/arch/mips/ralink/common.h
++++ b/arch/mips/ralink/common.h
+@@ -19,6 +19,7 @@ struct ralink_soc_info {
+ unsigned long mem_size;
+ unsigned long mem_size_min;
+ unsigned long mem_size_max;
++ void (*mem_detect)(void);
+ };
+ extern struct ralink_soc_info soc_info;
+
+--- a/arch/mips/ralink/of.c
++++ b/arch/mips/ralink/of.c
+@@ -89,6 +89,8 @@ void __init plat_mem_setup(void)
+ of_scan_flat_dt(early_init_dt_find_memory, NULL);
+ if (memory_dtb)
+ of_scan_flat_dt(early_init_dt_scan_memory, NULL);
++ else if (soc_info.mem_detect)
++ soc_info.mem_detect();
+ else if (soc_info.mem_size)
+ add_memory_region(soc_info.mem_base, soc_info.mem_size * SZ_1M,
+ BOOT_MEM_RAM);
diff --git a/target/linux/ramips/patches-5.4/110-mt7621-perfctr-fix.patch b/target/linux/ramips/patches-5.4/110-mt7621-perfctr-fix.patch
new file mode 100644
index 00000000000..4c40e65ab94
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/110-mt7621-perfctr-fix.patch
@@ -0,0 +1,15 @@
+--- a/arch/mips/ralink/irq-gic.c
++++ b/arch/mips/ralink/irq-gic.c
+@@ -15,6 +15,12 @@
+
+ int get_c0_perfcount_int(void)
+ {
++ /*
++ * Performance counter events are routed through GIC.
++ * Prevent them from firing on CPU IRQ7 as well
++ */
++ clear_c0_status(IE_SW0 << 7);
++
+ return gic_get_c0_perfcount_int();
+ }
+ EXPORT_SYMBOL_GPL(get_c0_perfcount_int);
diff --git a/target/linux/ramips/patches-5.4/300-mt7620-export-chip-version-and-pkg.patch b/target/linux/ramips/patches-5.4/300-mt7620-export-chip-version-and-pkg.patch
new file mode 100644
index 00000000000..0cb1fede306
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/300-mt7620-export-chip-version-and-pkg.patch
@@ -0,0 +1,19 @@
+--- a/arch/mips/include/asm/mach-ralink/mt7620.h
++++ b/arch/mips/include/asm/mach-ralink/mt7620.h
+@@ -137,4 +137,16 @@ static inline int mt7620_get_eco(void)
+ return rt_sysc_r32(SYSC_REG_CHIP_REV) & CHIP_REV_ECO_MASK;
+ }
+
++static inline int mt7620_get_chipver(void)
++{
++ return (rt_sysc_r32(SYSC_REG_CHIP_REV) >> CHIP_REV_VER_SHIFT) &
++ CHIP_REV_VER_MASK;
++}
++
++static inline int mt7620_get_pkg(void)
++{
++ return (rt_sysc_r32(SYSC_REG_CHIP_REV) >> CHIP_REV_PKG_SHIFT) &
++ CHIP_REV_PKG_MASK;
++}
++
+ #endif
diff --git a/target/linux/ramips/patches-5.4/302-spi-nor-add-gd25q512.patch b/target/linux/ramips/patches-5.4/302-spi-nor-add-gd25q512.patch
new file mode 100644
index 00000000000..0a3a65d70a7
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/302-spi-nor-add-gd25q512.patch
@@ -0,0 +1,14 @@
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -1066,6 +1066,11 @@ static const struct flash_info spi_nor_i
+ SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+ SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+ },
++ {
++ "gd25q512", INFO(0xc84020, 0, 64 * 1024, 1024,
++ SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
++ SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_4B_OPCODES)
++ },
+
+ /* Intel/Numonyx -- xxxs33b */
+ { "160s33b", INFO(0x898911, 0, 64 * 1024, 32, 0) },
diff --git a/target/linux/ramips/patches-5.4/304-spi-nor-enable-4B-opcodes-for-mx25l25635f.patch b/target/linux/ramips/patches-5.4/304-spi-nor-enable-4B-opcodes-for-mx25l25635f.patch
new file mode 100644
index 00000000000..8b59a106e1b
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/304-spi-nor-enable-4B-opcodes-for-mx25l25635f.patch
@@ -0,0 +1,72 @@
+This hack can be dropped after the next stable release from
+v5.x-tree.
+
+The problem was fixed upstream by
+
+commit 2bffa65da43e ("mtd: spi-nor: Add a post BFPT fixup for MX25L25635E")
+
+For reference see:
+<https://github.com/openwrt/openwrt/pull/1743>
+
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -1103,6 +1103,7 @@ static const struct flash_info spi_nor_i
+ { "mx25l12805d", INFO(0xc22018, 0, 64 * 1024, 256, 0) },
+ { "mx25l12855e", INFO(0xc22618, 0, 64 * 1024, 256, 0) },
+ { "mx25l25635e", INFO(0xc22019, 0, 64 * 1024, 512, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
++ { "mx25l25635f", INFO(0xc22019, 0, 64 * 1024, 512, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
+ { "mx25u25635f", INFO(0xc22539, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_4B_OPCODES) },
+ { "mx25l25655e", INFO(0xc22619, 0, 64 * 1024, 512, 0) },
+ { "mx66l51235l", INFO(0xc2201a, 0, 64 * 1024, 1024, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
+@@ -1275,11 +1276,12 @@ static const struct flash_info spi_nor_i
+ { },
+ };
+
+-static const struct flash_info *spi_nor_read_id(struct spi_nor *nor)
++static const struct flash_info *spi_nor_read_id(struct spi_nor *nor,
++ const char *name)
+ {
+ int tmp;
+ u8 id[SPI_NOR_MAX_ID_LEN];
+- const struct flash_info *info;
++ const struct flash_info *info, *first_match = NULL;
+
+ tmp = nor->read_reg(nor, SPINOR_OP_RDID, id, SPI_NOR_MAX_ID_LEN);
+ if (tmp < 0) {
+@@ -1290,10 +1292,16 @@ static const struct flash_info *spi_nor_
+ for (tmp = 0; tmp < ARRAY_SIZE(spi_nor_ids) - 1; tmp++) {
+ info = &spi_nor_ids[tmp];
+ if (info->id_len) {
+- if (!memcmp(info->id, id, info->id_len))
+- return &spi_nor_ids[tmp];
++ if (!memcmp(info->id, id, info->id_len)) {
++ if (!name || !strcmp(name, info->name))
++ return info;
++ if (!first_match)
++ first_match = info;
++ }
+ }
+ }
++ if (first_match)
++ return first_match;
+ dev_err(nor->dev, "unrecognized JEDEC id bytes: %02x, %02x, %02x\n",
+ id[0], id[1], id[2]);
+ return ERR_PTR(-ENODEV);
+@@ -2773,7 +2781,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+ info = spi_nor_match_id(name);
+ /* Try to auto-detect if chip name wasn't specified or not found */
+ if (!info)
+- info = spi_nor_read_id(nor);
++ info = spi_nor_read_id(nor, NULL);
+ if (IS_ERR_OR_NULL(info))
+ return -ENOENT;
+
+@@ -2784,7 +2792,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+ if (name && info->id_len) {
+ const struct flash_info *jinfo;
+
+- jinfo = spi_nor_read_id(nor);
++ jinfo = spi_nor_read_id(nor, name);
+ if (IS_ERR(jinfo)) {
+ return PTR_ERR(jinfo);
+ } else if (jinfo != info) {
diff --git a/target/linux/ramips/patches-5.4/999-fix-pci-init-mt7620.patch b/target/linux/ramips/patches-5.4/999-fix-pci-init-mt7620.patch
new file mode 100644
index 00000000000..3310a6bdbac
--- /dev/null
+++ b/target/linux/ramips/patches-5.4/999-fix-pci-init-mt7620.patch
@@ -0,0 +1,21 @@
+--- a/arch/mips/pci/pci-mt7620.c
++++ b/arch/mips/pci/pci-mt7620.c
+@@ -35,6 +35,7 @@
+ #define PPLL_CFG1 0x9c
+
+ #define PPLL_DRV 0xa0
++#define PPLL_LD (1<<23)
+ #define PDRV_SW_SET (1<<31)
+ #define LC_CKDRVPD (1<<19)
+ #define LC_CKDRVOHZ (1<<18)
+@@ -242,8 +243,8 @@ static int mt7620_pci_hw_init(struct pla
+ rt_sysc_m32(0, RALINK_PCIE0_CLK_EN, RALINK_CLKCFG1);
+ mdelay(100);
+
+- if (!(rt_sysc_r32(PPLL_CFG1) & PDRV_SW_SET)) {
+- dev_err(&pdev->dev, "MT7620 PPLL unlock\n");
++ if (!(rt_sysc_r32(PPLL_CFG1) & PPLL_LD)) {
++ dev_err(&pdev->dev, "MT7620 PPLL is unlocked, aborting init\n");
+ reset_control_assert(rstpcie0);
+ rt_sysc_m32(RALINK_PCIE0_CLK_EN, 0, RALINK_CLKCFG1);
+ return -1;