diff options
Diffstat (limited to 'arch/mips/pci/pci-bcm63xx.c')
| -rw-r--r-- | arch/mips/pci/pci-bcm63xx.c | 185 |
1 files changed, 156 insertions, 29 deletions
diff --git a/arch/mips/pci/pci-bcm63xx.c b/arch/mips/pci/pci-bcm63xx.c index 82e0fde1dba..151d9b5870b 100644 --- a/arch/mips/pci/pci-bcm63xx.c +++ b/arch/mips/pci/pci-bcm63xx.c @@ -10,8 +10,12 @@ #include <linux/pci.h> #include <linux/kernel.h> #include <linux/init.h> +#include <linux/delay.h> +#include <linux/clk.h> #include <asm/bootinfo.h> +#include <bcm63xx_reset.h> + #include "pci-bcm63xx.h" /* @@ -21,21 +25,21 @@ int bcm63xx_pci_enabled; static struct resource bcm_pci_mem_resource = { - .name = "bcm63xx PCI memory space", - .start = BCM_PCI_MEM_BASE_PA, - .end = BCM_PCI_MEM_END_PA, - .flags = IORESOURCE_MEM + .name = "bcm63xx PCI memory space", + .start = BCM_PCI_MEM_BASE_PA, + .end = BCM_PCI_MEM_END_PA, + .flags = IORESOURCE_MEM }; static struct resource bcm_pci_io_resource = { - .name = "bcm63xx PCI IO space", - .start = BCM_PCI_IO_BASE_PA, + .name = "bcm63xx PCI IO space", + .start = BCM_PCI_IO_BASE_PA, #ifdef CONFIG_CARDBUS - .end = BCM_PCI_IO_HALF_PA, + .end = BCM_PCI_IO_HALF_PA, #else - .end = BCM_PCI_IO_END_PA, + .end = BCM_PCI_IO_END_PA, #endif - .flags = IORESOURCE_IO + .flags = IORESOURCE_IO }; struct pci_controller bcm63xx_controller = { @@ -51,17 +55,17 @@ struct pci_controller bcm63xx_controller = { */ #ifdef CONFIG_CARDBUS static struct resource bcm_cb_mem_resource = { - .name = "bcm63xx Cardbus memory space", - .start = BCM_CB_MEM_BASE_PA, - .end = BCM_CB_MEM_END_PA, - .flags = IORESOURCE_MEM + .name = "bcm63xx Cardbus memory space", + .start = BCM_CB_MEM_BASE_PA, + .end = BCM_CB_MEM_END_PA, + .flags = IORESOURCE_MEM }; static struct resource bcm_cb_io_resource = { - .name = "bcm63xx Cardbus IO space", - .start = BCM_PCI_IO_HALF_PA + 1, - .end = BCM_PCI_IO_END_PA, - .flags = IORESOURCE_IO + .name = "bcm63xx Cardbus IO space", + .start = BCM_PCI_IO_HALF_PA + 1, + .end = BCM_PCI_IO_END_PA, + .flags = IORESOURCE_IO }; struct pci_controller bcm63xx_cb_controller = { @@ -71,6 +75,26 @@ struct pci_controller bcm63xx_cb_controller = { }; #endif +static struct resource bcm_pcie_mem_resource = { + .name = "bcm63xx PCIe memory space", + .start = BCM_PCIE_MEM_BASE_PA, + .end = BCM_PCIE_MEM_END_PA, + .flags = IORESOURCE_MEM, +}; + +static struct resource bcm_pcie_io_resource = { + .name = "bcm63xx PCIe IO space", + .start = 0, + .end = 0, + .flags = 0, +}; + +struct pci_controller bcm63xx_pcie_controller = { + .pci_ops = &bcm63xx_pcie_ops, + .io_resource = &bcm_pcie_io_resource, + .mem_resource = &bcm_pcie_mem_resource, +}; + static u32 bcm63xx_int_cfg_readl(u32 reg) { u32 tmp; @@ -87,30 +111,113 @@ static void bcm63xx_int_cfg_writel(u32 val, u32 reg) u32 tmp; tmp = reg & MPI_PCICFGCTL_CFGADDR_MASK; - tmp |= MPI_PCICFGCTL_WRITEEN_MASK; + tmp |= MPI_PCICFGCTL_WRITEEN_MASK; bcm_mpi_writel(tmp, MPI_PCICFGCTL_REG); bcm_mpi_writel(val, MPI_PCICFGDATA_REG); } void __iomem *pci_iospace_start; -static int __init bcm63xx_pci_init(void) +static void __init bcm63xx_reset_pcie(void) { - unsigned int mem_size; u32 val; + u32 reg; - if (!BCMCPU_IS_6348() && !BCMCPU_IS_6358()) - return -ENODEV; + /* enable SERDES */ + if (BCMCPU_IS_6328()) + reg = MISC_SERDES_CTRL_6328_REG; + else + reg = MISC_SERDES_CTRL_6362_REG; - if (!bcm63xx_pci_enabled) + val = bcm_misc_readl(reg); + val |= SERDES_PCIE_EN | SERDES_PCIE_EXD_EN; + bcm_misc_writel(val, reg); + + /* reset the PCIe core */ + bcm63xx_core_set_reset(BCM63XX_RESET_PCIE, 1); + bcm63xx_core_set_reset(BCM63XX_RESET_PCIE_EXT, 1); + mdelay(10); + + bcm63xx_core_set_reset(BCM63XX_RESET_PCIE, 0); + mdelay(10); + + bcm63xx_core_set_reset(BCM63XX_RESET_PCIE_EXT, 0); + mdelay(200); +} + +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); + + bcm63xx_reset_pcie(); + + /* configure the PCIe bridge */ + val = bcm_pcie_readl(PCIE_BRIDGE_OPT1_REG); + val |= OPT1_RD_BE_OPT_EN; + val |= OPT1_RD_REPLY_BE_FIX_EN; + val |= OPT1_PCIE_BRIDGE_HOLE_DET_EN; + val |= OPT1_L1_INT_STATUS_MASK_POL; + bcm_pcie_writel(val, PCIE_BRIDGE_OPT1_REG); + + /* setup the interrupts */ + val = bcm_pcie_readl(PCIE_BRIDGE_RC_INT_MASK_REG); + val |= PCIE_RC_INT_A | PCIE_RC_INT_B | PCIE_RC_INT_C | PCIE_RC_INT_D; + bcm_pcie_writel(val, PCIE_BRIDGE_RC_INT_MASK_REG); + + val = bcm_pcie_readl(PCIE_BRIDGE_OPT2_REG); + /* enable credit checking and error checking */ + val |= OPT2_TX_CREDIT_CHK_EN; + val |= OPT2_UBUS_UR_DECODE_DIS; + + /* set device bus/func for the pcie device */ + val |= (PCIE_BUS_DEVICE << OPT2_CFG_TYPE1_BUS_NO_SHIFT); + val |= OPT2_CFG_TYPE1_BD_SEL; + bcm_pcie_writel(val, PCIE_BRIDGE_OPT2_REG); + + /* setup class code as bridge */ + val = bcm_pcie_readl(PCIE_IDVAL3_REG); + val &= ~IDVAL3_CLASS_CODE_MASK; + val |= (PCI_CLASS_BRIDGE_PCI << IDVAL3_SUBCLASS_SHIFT); + bcm_pcie_writel(val, PCIE_IDVAL3_REG); + + /* disable bar1 size */ + val = bcm_pcie_readl(PCIE_CONFIG2_REG); + val &= ~CONFIG2_BAR1_SIZE_MASK; + bcm_pcie_writel(val, PCIE_CONFIG2_REG); + + /* set bar0 to little endian */ + val = (BCM_PCIE_MEM_BASE_PA >> 20) << BASEMASK_BASE_SHIFT; + val |= (BCM_PCIE_MEM_BASE_PA >> 20) << BASEMASK_MASK_SHIFT; + val |= BASEMASK_REMAP_EN; + bcm_pcie_writel(val, PCIE_BRIDGE_BAR0_BASEMASK_REG); + + val = (BCM_PCIE_MEM_BASE_PA >> 20) << REBASE_ADDR_BASE_SHIFT; + bcm_pcie_writel(val, PCIE_BRIDGE_BAR0_REBASE_ADDR_REG); + + register_pci_controller(&bcm63xx_pcie_controller); + + return 0; +} + +static int __init bcm63xx_register_pci(void) +{ + unsigned int mem_size; + u32 val; /* * configuration access are done through IO space, remap 4 * first bytes to access it from CPU. * * this means that no io access from CPU should happen while - * we do a configuration cycle, but there's no way we can add + * we do a configuration cycle, but there's no way we can add * a spinlock for each io access, so this is currently kind of * broken on SMP. */ @@ -143,9 +250,9 @@ static int __init bcm63xx_pci_init(void) bcm_mpi_writel(0, MPI_L2PMEMREMAP2_REG); #endif - /* setup local bus to PCI access (IO memory), we have only 1 - * IO window for both PCI and cardbus, but it cannot handle - * both at the same time, assume standard PCI for now, if + /* setup local bus to PCI access (IO memory), we have only 1 + * IO window for both PCI and cardbus, but it cannot handle + * both at the same time, assume standard PCI for now, if * cardbus card has IO zone, PCI fixup will change window to * cardbus */ val = BCM_PCI_IO_BASE_PA & MPI_L2P_BASE_MASK; @@ -159,7 +266,7 @@ static int __init bcm63xx_pci_init(void) /* setup PCI to local bus access, used by PCI device to target * local RAM while bus mastering */ bcm63xx_int_cfg_writel(0, PCI_BASE_ADDRESS_3); - if (BCMCPU_IS_6358()) + if (BCMCPU_IS_3368() || BCMCPU_IS_6358() || BCMCPU_IS_6368()) val = MPI_SP0_REMAP_ENABLE_MASK; else val = 0; @@ -183,7 +290,7 @@ static int __init bcm63xx_pci_init(void) bcm_mpi_writel(0, MPI_SP1_RANGE_REG); } - /* change host bridge retry counter to infinite number of + /* change host bridge retry counter to infinite number of * retry, needed for some broadcom wifi cards with Silicon * Backplane bus where access to srom seems very slow */ val = bcm63xx_int_cfg_readl(BCMPCI_REG_TIMERS); @@ -221,4 +328,24 @@ static int __init bcm63xx_pci_init(void) return 0; } + +static int __init bcm63xx_pci_init(void) +{ + if (!bcm63xx_pci_enabled) + return -ENODEV; + + switch (bcm63xx_get_cpu_id()) { + case BCM6328_CPU_ID: + case BCM6362_CPU_ID: + return bcm63xx_register_pcie(); + case BCM3368_CPU_ID: + case BCM6348_CPU_ID: + case BCM6358_CPU_ID: + case BCM6368_CPU_ID: + return bcm63xx_register_pci(); + default: + return -ENODEV; + } +} + arch_initcall(bcm63xx_pci_init); |