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 = { @@ -405,7 +422,7 @@ 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 @@ -1543,6 +1543,17 @@ * _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 @@ -1588,7 +1599,54 @@ #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: