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b27977b41b
openwrt/target/linux/brcm63xx/patches-4.4/343-MIPS-BCM63XX-add-PCIe-support-for-BCM6318.patch
Mathias Kresin b27977b41b brcm63xx: add NULL clock fix send upstream 
Make the behaviour of clk_get_rate consistent with common clk's
clk_get_rate by accepting NULL clocks as parameter. Some device
drivers rely on this, and will cause an OOPS otherwise.

Fixes: FS#735

Signed-off-by: Mathias Kresin <dev@kresin.me>
2017-07-29 09:24:27 +02:00

343 lines
11 KiB
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Raw Blame History

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
@@ -50,6 +50,18 @@ static void bcm_hwclock_set(u32 mask, in
bcm_perf_writel(reg, PERF_CKCTL_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
*/
@@ -317,12 +329,17 @@ 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 = {
@@ -408,7 +425,7 @@ struct clk *clk_get(struct device *dev,
if ((BCMCPU_IS_6362() || BCMCPU_IS_6368() || BCMCPU_IS_63268()) &&
!strcmp(id, "ipsec"))
return &clk_ipsec;
- if ((BCMCPU_IS_6328() || BCMCPU_IS_6362() || BCMCPU_IS_63268()) &&
+ if ((BCMCPU_IS_6318() || BCMCPU_IS_6328() || BCMCPU_IS_6362() || BCMCPU_IS_63268()) &&
!strcmp(id, "pcie"))
return &clk_pcie;
return ERR_PTR(-ENOENT);
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_io.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_io.h
@@ -40,6 +40,12 @@
#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
@@ -1529,6 +1529,17 @@
* _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
@@ -1574,7 +1585,54 @@
#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
@@ -488,8 +488,12 @@ 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);
@@ -508,8 +512,12 @@ 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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