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openwrt/target/linux/bcm63xx/patches-5.15/343-MIPS-BCM63XX-add-PCIe-support-for-BCM6318.patch
Daniel González Cabanelas e55b4b436e bcm63xx: kernel: fix up bcm63268 roboswitch gpio registers 
Some BCM63268 bootloaders may leave gpio registers, related to the
roboswitch, disabled before loading the OpenWrt firmware. As result of
this the switch won't work.

These registers, if not enabled, probably avoid forwarding packets.

Signed-off-by: Daniel González Cabanelas <dgcbueu@gmail.com>
2023-03-04 20:07:33 +01:00

334 lines
11 KiB
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From 11a8ab8dac4ef5d0d70199843043927edce1d4db Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jogo@openwrt.org>
Date: Sun, 15 Dec 2013 20:47:34 +0100
Subject: [PATCH 53/53] MIPS: BCM63XX: add PCIe support for BCM6318
---
arch/mips/bcm63xx/clk.c | 25 ++++-
arch/mips/include/asm/mach-bcm63xx/bcm63xx_io.h | 6 ++
arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h | 60 +++++++++++-
arch/mips/pci/ops-bcm63xx.c | 16 +++-
arch/mips/pci/pci-bcm63xx.c | 106 ++++++++++++++++++----
5 files changed, 184 insertions(+), 29 deletions(-)
--- a/arch/mips/bcm63xx/clk.c
+++ b/arch/mips/bcm63xx/clk.c
@@ -64,6 +64,18 @@ static void bcm_gpiorobosw_set(u32 mask,
bcm_gpio_writel(reg, GPIO_ROBOSW_SW_CTRL_REG);
}
+static void bcm_ub_hwclock_set(u32 mask, int enable)
+{
+ u32 reg;
+
+ reg = bcm_perf_readl(PERF_UB_CKCTL_REG);
+ if (enable)
+ reg |= mask;
+ else
+ reg &= ~mask;
+ bcm_perf_writel(reg, PERF_UB_CKCTL_REG);
+}
+
/*
* Ethernet MAC "misc" clock: dma clocks and main clock on 6348
*/
@@ -376,12 +388,17 @@ static struct clk clk_ipsec = {
static void pcie_set(struct clk *clk, int enable)
{
- if (BCMCPU_IS_6328())
+ if (BCMCPU_IS_6318()) {
+ bcm_hwclock_set(CKCTL_6318_PCIE_EN, enable);
+ bcm_hwclock_set(CKCTL_6318_PCIE25_EN, enable);
+ bcm_ub_hwclock_set(UB_CKCTL_6318_PCIE_EN, enable);
+ } else if (BCMCPU_IS_6328()) {
bcm_hwclock_set(CKCTL_6328_PCIE_EN, enable);
- else if (BCMCPU_IS_6362())
+ } else if (BCMCPU_IS_6362()) {
bcm_hwclock_set(CKCTL_6362_PCIE_EN, enable);
- else if (BCMCPU_IS_63268())
+ } else if (BCMCPU_IS_63268()) {
bcm_hwclock_set(CKCTL_63268_PCIE_EN, enable);
+ }
}
static struct clk clk_pcie = {
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_io.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_io.h
@@ -41,6 +41,12 @@
#define BCM_CB_MEM_END_PA (BCM_CB_MEM_BASE_PA + \
BCM_CB_MEM_SIZE - 1)
+#define BCM_PCIE_MEM_BASE_PA_6318 0x10200000
+#define BCM_PCIE_MEM_SIZE_6318 (1 * 1024 * 1024)
+#define BCM_PCIE_MEM_END_PA_6318 (BCM_PCIE_MEM_BASE_PA_6318 + \
+ BCM_PCIE_MEM_SIZE_6318 - 1)
+
+
#define BCM_PCIE_MEM_BASE_PA_6328 0x10f00000
#define BCM_PCIE_MEM_SIZE_6328 (1 * 1024 * 1024)
#define BCM_PCIE_MEM_END_PA_6328 (BCM_PCIE_MEM_BASE_PA_6328 + \
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
@@ -1535,6 +1535,17 @@
* _REG relative to RSET_PCIE
*************************************************************************/
+#define PCIE_SPECIFIC_REG 0x188
+#define SPECIFIC_ENDIAN_MODE_BAR1_SHIFT 0
+#define SPECIFIC_ENDIAN_MODE_BAR1_MASK (0x3 << SPECIFIC_ENDIAN_MODE_BAR1_SHIFT)
+#define SPECIFIC_ENDIAN_MODE_BAR2_SHIFT 2
+#define SPECIFIC_ENDIAN_MODE_BAR2_MASK (0x3 << SPECIFIC_ENDIAN_MODE_BAR1_SHIFT)
+#define SPECIFIC_ENDIAN_MODE_BAR3_SHIFT 4
+#define SPECIFIC_ENDIAN_MODE_BAR3_MASK (0x3 << SPECIFIC_ENDIAN_MODE_BAR1_SHIFT)
+#define SPECIFIC_ENDIAN_MODE_WORD_ALIGN 0
+#define SPECIFIC_ENDIAN_MODE_HALFWORD_ALIGN 1
+#define SPECIFIC_ENDIAN_MODE_BYTE_ALIGN 2
+
#define PCIE_CONFIG2_REG 0x408
#define CONFIG2_BAR1_SIZE_EN 1
#define CONFIG2_BAR1_SIZE_MASK 0xf
@@ -1580,7 +1591,54 @@
#define PCIE_RC_INT_C (1 << 2)
#define PCIE_RC_INT_D (1 << 3)
-#define PCIE_DEVICE_OFFSET 0x8000
+#define PCIE_CPU_2_PCIE_MEM_WIN0_LO_REG 0x400c
+#define C2P_MEM_WIN_ENDIAN_MODE_MASK 0x3
+#define C2P_MEM_WIN_ENDIAN_NO_SWAP 0
+#define C2P_MEM_WIN_ENDIAN_HALF_WORD_SWAP 1
+#define C2P_MEM_WIN_ENDIAN_HALF_BYTE_SWAP 2
+#define C2P_MEM_WIN_BASE_ADDR_SHIFT 20
+#define C2P_MEM_WIN_BASE_ADDR_MASK (0xfff << C2P_MEM_WIN_BASE_ADDR_SHIFT)
+
+#define PCIE_RC_BAR1_CONFIG_LO_REG 0x402c
+#define RC_BAR_CFG_LO_SIZE_256MB 0xd
+#define RC_BAR_CFG_LO_MATCH_ADDR_SHIFT 20
+#define RC_BAR_CFG_LO_MATCH_ADDR_MASK (0xfff << RC_BAR_CFG_LO_MATCH_ADDR_SHIFT)
+
+#define PCIE_CPU_2_PCIE_MEM_WIN0_BASELIMIT_REG 0x4070
+#define C2P_BASELIMIT_LIMIT_SHIFT 20
+#define C2P_BASELIMIT_LIMIT_MASK (0xfff << C2P_BASELIMIT_LIMIT_SHIFT)
+#define C2P_BASELIMIT_BASE_SHIFT 4
+#define C2P_BASELIMIT_BASE_MASK (0xfff << C2P_BASELIMIT_BASE_SHIFT)
+
+#define PCIE_UBUS_BAR1_CFG_REMAP_REG 0x4088
+#define BAR1_CFG_REMAP_OFFSET_SHIFT 20
+#define BAR1_CFG_REMAP_OFFSET_MASK (0xfff << BAR1_CFG_REMAP_OFFSET_SHIFT)
+#define BAR1_CFG_REMAP_ACCESS_EN 1
+
+#define PCIE_HARD_DEBUG_REG 0x4204
+#define HARD_DEBUG_SERDES_IDDQ (1 << 23)
+
+#define PCIE_CPU_INT1_MASK_CLEAR_REG 0x830c
+#define CPU_INT_PCIE_ERR_ATTN_CPU (1 << 0)
+#define CPU_INT_PCIE_INTA (1 << 1)
+#define CPU_INT_PCIE_INTB (1 << 2)
+#define CPU_INT_PCIE_INTC (1 << 3)
+#define CPU_INT_PCIE_INTD (1 << 4)
+#define CPU_INT_PCIE_INTR (1 << 5)
+#define CPU_INT_PCIE_NMI (1 << 6)
+#define CPU_INT_PCIE_UBUS (1 << 7)
+#define CPU_INT_IPI (1 << 8)
+
+#define PCIE_EXT_CFG_INDEX_REG 0x8400
+#define EXT_CFG_FUNC_NUM_SHIFT 12
+#define EXT_CFG_FUNC_NUM_MASK (0x7 << EXT_CFG_FUNC_NUM_SHIFT)
+#define EXT_CFG_DEV_NUM_SHIFT 15
+#define EXT_CFG_DEV_NUM_MASK (0xf << EXT_CFG_DEV_NUM_SHIFT)
+#define EXT_CFG_BUS_NUM_SHIFT 20
+#define EXT_CFG_BUS_NUM_MASK (0xff << EXT_CFG_BUS_NUM_SHIFT)
+
+#define PCIE_DEVICE_OFFSET_6318 0x9000
+#define PCIE_DEVICE_OFFSET_6328 0x8000
/*************************************************************************
* _REG relative to RSET_OTP
--- a/arch/mips/pci/ops-bcm63xx.c
+++ b/arch/mips/pci/ops-bcm63xx.c
@@ -489,8 +489,12 @@ static int bcm63xx_pcie_read(struct pci_
if (!bcm63xx_pcie_can_access(bus, devfn))
return PCIBIOS_DEVICE_NOT_FOUND;
- if (bus->number == PCIE_BUS_DEVICE)
- reg += PCIE_DEVICE_OFFSET;
+ if (bus->number == PCIE_BUS_DEVICE) {
+ if (BCMCPU_IS_6318())
+ reg += PCIE_DEVICE_OFFSET_6318;
+ else
+ reg += PCIE_DEVICE_OFFSET_6328;
+ }
data = bcm_pcie_readl(reg);
@@ -509,8 +513,12 @@ static int bcm63xx_pcie_write(struct pci
if (!bcm63xx_pcie_can_access(bus, devfn))
return PCIBIOS_DEVICE_NOT_FOUND;
- if (bus->number == PCIE_BUS_DEVICE)
- reg += PCIE_DEVICE_OFFSET;
+ if (bus->number == PCIE_BUS_DEVICE) {
+ if (BCMCPU_IS_6318())
+ reg += PCIE_DEVICE_OFFSET_6318;
+ else
+ reg += PCIE_DEVICE_OFFSET_6328;
+ }
data = bcm_pcie_readl(reg);
--- a/arch/mips/pci/pci-bcm63xx.c
+++ b/arch/mips/pci/pci-bcm63xx.c
@@ -118,7 +118,7 @@ static void bcm63xx_int_cfg_writel(u32 v
void __iomem *pci_iospace_start;
-static void __init bcm63xx_reset_pcie(void)
+static void __init bcm63xx_reset_pcie_gen1(void)
{
u32 val;
u32 reg;
@@ -152,20 +152,32 @@ static void __init bcm63xx_reset_pcie(vo
mdelay(200);
}
-static struct clk *pcie_clk;
-
-static int __init bcm63xx_register_pcie(void)
+static void __init bcm63xx_reset_pcie_gen2(void)
{
u32 val;
- /* enable clock */
- pcie_clk = clk_get(NULL, "pcie");
- if (IS_ERR_OR_NULL(pcie_clk))
- return -ENODEV;
+ bcm63xx_core_set_reset(BCM63XX_RESET_PCIE_HARD, 0);
- clk_prepare_enable(pcie_clk);
+ /* reset the PCIe core */
+ bcm63xx_core_set_reset(BCM63XX_RESET_PCIE, 1);
+ bcm63xx_core_set_reset(BCM63XX_RESET_PCIE_EXT, 1);
+ bcm63xx_core_set_reset(BCM63XX_RESET_PCIE_CORE, 1);
+ mdelay(10);
+ bcm63xx_core_set_reset(BCM63XX_RESET_PCIE_EXT, 0);
+ mdelay(10);
+ bcm63xx_core_set_reset(BCM63XX_RESET_PCIE, 0);
+ mdelay(10);
+ val = bcm_pcie_readl(PCIE_HARD_DEBUG_REG);
+ val &= ~HARD_DEBUG_SERDES_IDDQ;
+ bcm_pcie_writel(val, PCIE_HARD_DEBUG_REG);
+ mdelay(10);
+ bcm63xx_core_set_reset(BCM63XX_RESET_PCIE_CORE, 0);
+ mdelay(200);
+}
- bcm63xx_reset_pcie();
+static void __init bcm63xx_init_pcie_gen1(void)
+{
+ u32 val;
/* configure the PCIe bridge */
val = bcm_pcie_readl(PCIE_BRIDGE_OPT1_REG);
@@ -190,6 +202,65 @@ static int __init bcm63xx_register_pcie(
val |= OPT2_CFG_TYPE1_BD_SEL;
bcm_pcie_writel(val, PCIE_BRIDGE_OPT2_REG);
+ /* set bar0 to little endian */
+ val = (bcm_pcie_mem_resource.start >> 20) << BASEMASK_BASE_SHIFT;
+ val |= (bcm_pcie_mem_resource.end >> 20) << BASEMASK_MASK_SHIFT;
+ val |= BASEMASK_REMAP_EN;
+ bcm_pcie_writel(val, PCIE_BRIDGE_BAR0_BASEMASK_REG);
+
+ val = (bcm_pcie_mem_resource.start >> 20) << REBASE_ADDR_BASE_SHIFT;
+ bcm_pcie_writel(val, PCIE_BRIDGE_BAR0_REBASE_ADDR_REG);
+}
+
+static void __init bcm63xx_init_pcie_gen2(void)
+{
+ u32 val;
+
+ bcm_pcie_writel(CPU_INT_PCIE_INTA | CPU_INT_PCIE_INTB |
+ CPU_INT_PCIE_INTC | CPU_INT_PCIE_INTD,
+ PCIE_CPU_INT1_MASK_CLEAR_REG);
+
+ val = bcm_pcie_mem_resource.end & C2P_BASELIMIT_LIMIT_MASK;
+ val |= (bcm_pcie_mem_resource.start >> C2P_BASELIMIT_LIMIT_SHIFT) <<
+ C2P_BASELIMIT_BASE_SHIFT;
+
+ bcm_pcie_writel(val, PCIE_CPU_2_PCIE_MEM_WIN0_BASELIMIT_REG);
+
+ /* set bar0 to little endian */
+ val = bcm_pcie_readl(PCIE_CPU_2_PCIE_MEM_WIN0_LO_REG);
+ val |= bcm_pcie_mem_resource.start & C2P_MEM_WIN_BASE_ADDR_MASK;
+ val |= C2P_MEM_WIN_ENDIAN_HALF_BYTE_SWAP;
+ bcm_pcie_writel(val, PCIE_CPU_2_PCIE_MEM_WIN0_LO_REG);
+
+ bcm_pcie_writel(SPECIFIC_ENDIAN_MODE_BYTE_ALIGN, PCIE_SPECIFIC_REG);
+ bcm_pcie_writel(RC_BAR_CFG_LO_SIZE_256MB, PCIE_RC_BAR1_CONFIG_LO_REG);
+ bcm_pcie_writel(BAR1_CFG_REMAP_ACCESS_EN, PCIE_UBUS_BAR1_CFG_REMAP_REG);
+
+ bcm_pcie_writel(PCIE_BUS_DEVICE << EXT_CFG_BUS_NUM_SHIFT,
+ PCIE_EXT_CFG_INDEX_REG);
+}
+
+static struct clk *pcie_clk;
+
+static int __init bcm63xx_register_pcie(void)
+{
+ u32 val;
+
+ /* enable clock */
+ pcie_clk = clk_get(NULL, "pcie");
+ if (IS_ERR_OR_NULL(pcie_clk))
+ return -ENODEV;
+
+ clk_prepare_enable(pcie_clk);
+
+ if (BCMCPU_IS_6328() || BCMCPU_IS_6362() || BCMCPU_IS_63268()) {
+ bcm63xx_reset_pcie_gen1();
+ bcm63xx_init_pcie_gen1();
+ } else {
+ bcm63xx_reset_pcie_gen2();
+ bcm63xx_init_pcie_gen2();
+ }
+
/* setup class code as bridge */
val = bcm_pcie_readl(PCIE_IDVAL3_REG);
val &= ~IDVAL3_CLASS_CODE_MASK;
@@ -201,15 +272,6 @@ static int __init bcm63xx_register_pcie(
val &= ~CONFIG2_BAR1_SIZE_MASK;
bcm_pcie_writel(val, PCIE_CONFIG2_REG);
- /* set bar0 to little endian */
- val = (bcm_pcie_mem_resource.start >> 20) << BASEMASK_BASE_SHIFT;
- val |= (bcm_pcie_mem_resource.end >> 20) << BASEMASK_MASK_SHIFT;
- val |= BASEMASK_REMAP_EN;
- bcm_pcie_writel(val, PCIE_BRIDGE_BAR0_BASEMASK_REG);
-
- val = (bcm_pcie_mem_resource.start >> 20) << REBASE_ADDR_BASE_SHIFT;
- bcm_pcie_writel(val, PCIE_BRIDGE_BAR0_REBASE_ADDR_REG);
-
register_pci_controller(&bcm63xx_pcie_controller);
return 0;
@@ -341,7 +403,10 @@ static int __init bcm63xx_pci_init(void)
if (!bcm63xx_pci_enabled)
return -ENODEV;
- if (BCMCPU_IS_6328() || BCMCPU_IS_6362()) {
+ if (BCMCPU_IS_6318()) {
+ bcm_pcie_mem_resource.start = BCM_PCIE_MEM_BASE_PA_6318;
+ bcm_pcie_mem_resource.end = BCM_PCIE_MEM_END_PA_6318;
+ } if (BCMCPU_IS_6328() || BCMCPU_IS_6362()) {
bcm_pcie_mem_resource.start = BCM_PCIE_MEM_BASE_PA_6328;
bcm_pcie_mem_resource.end = BCM_PCIE_MEM_END_PA_6328;
} else if (BCMCPU_IS_63268()) {
@@ -350,6 +415,7 @@ static int __init bcm63xx_pci_init(void)
}
switch (bcm63xx_get_cpu_id()) {
+ case BCM6318_CPU_ID:
case BCM6328_CPU_ID:
case BCM6362_CPU_ID:
case BCM63268_CPU_ID:
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