diff options
Diffstat (limited to 'arch/arm/mach-integrator/pci_v3.c')
| -rw-r--r-- | arch/arm/mach-integrator/pci_v3.c | 564 |
1 files changed, 498 insertions, 66 deletions
diff --git a/arch/arm/mach-integrator/pci_v3.c b/arch/arm/mach-integrator/pci_v3.c index e7fcea7f3300..bef100527c42 100644 --- a/arch/arm/mach-integrator/pci_v3.c +++ b/arch/arm/mach-integrator/pci_v3.c @@ -27,16 +27,199 @@ #include <linux/spinlock.h> #include <linux/init.h> #include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/of_pci.h> +#include <video/vga.h> #include <mach/hardware.h> #include <mach/platform.h> #include <mach/irqs.h> +#include <asm/mach/map.h> #include <asm/signal.h> #include <asm/mach/pci.h> #include <asm/irq_regs.h> -#include <asm/hardware/pci_v3.h> +#include "pci_v3.h" + +/* + * Where in the memory map does PCI live? + * + * This represents a fairly liberal usage of address space. Even though + * the V3 only has two windows (therefore we need to map stuff on the fly), + * we maintain the same addresses, even if they're not mapped. + */ +#define PHYS_PCI_MEM_BASE 0x40000000 /* 256M */ +#define PHYS_PCI_PRE_BASE 0x50000000 /* 256M */ +#define PHYS_PCI_IO_BASE 0x60000000 /* 16M */ +#define PHYS_PCI_CONFIG_BASE 0x61000000 /* 16M */ +#define PHYS_PCI_V3_BASE 0x62000000 /* 64K */ + +#define PCI_MEMORY_VADDR IOMEM(0xe8000000) +#define PCI_CONFIG_VADDR IOMEM(0xec000000) + +/* + * V3 Local Bus to PCI Bridge definitions + * + * Registers (these are taken from page 129 of the EPC User's Manual Rev 1.04 + * All V3 register names are prefaced by V3_ to avoid clashing with any other + * PCI definitions. Their names match the user's manual. + * + * I'm assuming that I20 is disabled. + * + */ +#define V3_PCI_VENDOR 0x00000000 +#define V3_PCI_DEVICE 0x00000002 +#define V3_PCI_CMD 0x00000004 +#define V3_PCI_STAT 0x00000006 +#define V3_PCI_CC_REV 0x00000008 +#define V3_PCI_HDR_CFG 0x0000000C +#define V3_PCI_IO_BASE 0x00000010 +#define V3_PCI_BASE0 0x00000014 +#define V3_PCI_BASE1 0x00000018 +#define V3_PCI_SUB_VENDOR 0x0000002C +#define V3_PCI_SUB_ID 0x0000002E +#define V3_PCI_ROM 0x00000030 +#define V3_PCI_BPARAM 0x0000003C +#define V3_PCI_MAP0 0x00000040 +#define V3_PCI_MAP1 0x00000044 +#define V3_PCI_INT_STAT 0x00000048 +#define V3_PCI_INT_CFG 0x0000004C +#define V3_LB_BASE0 0x00000054 +#define V3_LB_BASE1 0x00000058 +#define V3_LB_MAP0 0x0000005E +#define V3_LB_MAP1 0x00000062 +#define V3_LB_BASE2 0x00000064 +#define V3_LB_MAP2 0x00000066 +#define V3_LB_SIZE 0x00000068 +#define V3_LB_IO_BASE 0x0000006E +#define V3_FIFO_CFG 0x00000070 +#define V3_FIFO_PRIORITY 0x00000072 +#define V3_FIFO_STAT 0x00000074 +#define V3_LB_ISTAT 0x00000076 +#define V3_LB_IMASK 0x00000077 +#define V3_SYSTEM 0x00000078 +#define V3_LB_CFG 0x0000007A +#define V3_PCI_CFG 0x0000007C +#define V3_DMA_PCI_ADR0 0x00000080 +#define V3_DMA_PCI_ADR1 0x00000090 +#define V3_DMA_LOCAL_ADR0 0x00000084 +#define V3_DMA_LOCAL_ADR1 0x00000094 +#define V3_DMA_LENGTH0 0x00000088 +#define V3_DMA_LENGTH1 0x00000098 +#define V3_DMA_CSR0 0x0000008B +#define V3_DMA_CSR1 0x0000009B +#define V3_DMA_CTLB_ADR0 0x0000008C +#define V3_DMA_CTLB_ADR1 0x0000009C +#define V3_DMA_DELAY 0x000000E0 +#define V3_MAIL_DATA 0x000000C0 +#define V3_PCI_MAIL_IEWR 0x000000D0 +#define V3_PCI_MAIL_IERD 0x000000D2 +#define V3_LB_MAIL_IEWR 0x000000D4 +#define V3_LB_MAIL_IERD 0x000000D6 +#define V3_MAIL_WR_STAT 0x000000D8 +#define V3_MAIL_RD_STAT 0x000000DA +#define V3_QBA_MAP 0x000000DC + +/* PCI COMMAND REGISTER bits + */ +#define V3_COMMAND_M_FBB_EN (1 << 9) +#define V3_COMMAND_M_SERR_EN (1 << 8) +#define V3_COMMAND_M_PAR_EN (1 << 6) +#define V3_COMMAND_M_MASTER_EN (1 << 2) +#define V3_COMMAND_M_MEM_EN (1 << 1) +#define V3_COMMAND_M_IO_EN (1 << 0) + +/* SYSTEM REGISTER bits + */ +#define V3_SYSTEM_M_RST_OUT (1 << 15) +#define V3_SYSTEM_M_LOCK (1 << 14) + +/* PCI_CFG bits + */ +#define V3_PCI_CFG_M_I2O_EN (1 << 15) +#define V3_PCI_CFG_M_IO_REG_DIS (1 << 14) +#define V3_PCI_CFG_M_IO_DIS (1 << 13) +#define V3_PCI_CFG_M_EN3V (1 << 12) +#define V3_PCI_CFG_M_RETRY_EN (1 << 10) +#define V3_PCI_CFG_M_AD_LOW1 (1 << 9) +#define V3_PCI_CFG_M_AD_LOW0 (1 << 8) + +/* PCI_BASE register bits (PCI -> Local Bus) + */ +#define V3_PCI_BASE_M_ADR_BASE 0xFFF00000 +#define V3_PCI_BASE_M_ADR_BASEL 0x000FFF00 +#define V3_PCI_BASE_M_PREFETCH (1 << 3) +#define V3_PCI_BASE_M_TYPE (3 << 1) +#define V3_PCI_BASE_M_IO (1 << 0) + +/* PCI MAP register bits (PCI -> Local bus) + */ +#define V3_PCI_MAP_M_MAP_ADR 0xFFF00000 +#define V3_PCI_MAP_M_RD_POST_INH (1 << 15) +#define V3_PCI_MAP_M_ROM_SIZE (3 << 10) +#define V3_PCI_MAP_M_SWAP (3 << 8) +#define V3_PCI_MAP_M_ADR_SIZE 0x000000F0 +#define V3_PCI_MAP_M_REG_EN (1 << 1) +#define V3_PCI_MAP_M_ENABLE (1 << 0) + +/* + * LB_BASE0,1 register bits (Local bus -> PCI) + */ +#define V3_LB_BASE_ADR_BASE 0xfff00000 +#define V3_LB_BASE_SWAP (3 << 8) +#define V3_LB_BASE_ADR_SIZE (15 << 4) +#define V3_LB_BASE_PREFETCH (1 << 3) +#define V3_LB_BASE_ENABLE (1 << 0) + +#define V3_LB_BASE_ADR_SIZE_1MB (0 << 4) +#define V3_LB_BASE_ADR_SIZE_2MB (1 << 4) +#define V3_LB_BASE_ADR_SIZE_4MB (2 << 4) +#define V3_LB_BASE_ADR_SIZE_8MB (3 << 4) +#define V3_LB_BASE_ADR_SIZE_16MB (4 << 4) +#define V3_LB_BASE_ADR_SIZE_32MB (5 << 4) +#define V3_LB_BASE_ADR_SIZE_64MB (6 << 4) +#define V3_LB_BASE_ADR_SIZE_128MB (7 << 4) +#define V3_LB_BASE_ADR_SIZE_256MB (8 << 4) +#define V3_LB_BASE_ADR_SIZE_512MB (9 << 4) +#define V3_LB_BASE_ADR_SIZE_1GB (10 << 4) +#define V3_LB_BASE_ADR_SIZE_2GB (11 << 4) + +#define v3_addr_to_lb_base(a) ((a) & V3_LB_BASE_ADR_BASE) + +/* + * LB_MAP0,1 register bits (Local bus -> PCI) + */ +#define V3_LB_MAP_MAP_ADR 0xfff0 +#define V3_LB_MAP_TYPE (7 << 1) +#define V3_LB_MAP_AD_LOW_EN (1 << 0) + +#define V3_LB_MAP_TYPE_IACK (0 << 1) +#define V3_LB_MAP_TYPE_IO (1 << 1) +#define V3_LB_MAP_TYPE_MEM (3 << 1) +#define V3_LB_MAP_TYPE_CONFIG (5 << 1) +#define V3_LB_MAP_TYPE_MEM_MULTIPLE (6 << 1) + +#define v3_addr_to_lb_map(a) (((a) >> 16) & V3_LB_MAP_MAP_ADR) + +/* + * LB_BASE2 register bits (Local bus -> PCI IO) + */ +#define V3_LB_BASE2_ADR_BASE 0xff00 +#define V3_LB_BASE2_SWAP (3 << 6) +#define V3_LB_BASE2_ENABLE (1 << 0) + +#define v3_addr_to_lb_base2(a) (((a) >> 16) & V3_LB_BASE2_ADR_BASE) + +/* + * LB_MAP2 register bits (Local bus -> PCI IO) + */ +#define V3_LB_MAP2_MAP_ADR 0xff00 + +#define v3_addr_to_lb_map2(a) (((a) >> 16) & V3_LB_MAP2_MAP_ADR) /* * The V3 PCI interface chip in Integrator provides several windows from @@ -101,15 +284,28 @@ * the mappings into PCI memory. */ +/* Filled in by probe */ +static void __iomem *pci_v3_base; +/* CPU side memory ranges */ +static struct resource conf_mem; /* FIXME: remap this instead of static map */ +static struct resource io_mem; +static struct resource non_mem; +static struct resource pre_mem; +/* PCI side memory ranges */ +static u64 non_mem_pci; +static u64 non_mem_pci_sz; +static u64 pre_mem_pci; +static u64 pre_mem_pci_sz; + // V3 access routines -#define v3_writeb(o,v) __raw_writeb(v, PCI_V3_VADDR + (unsigned int)(o)) -#define v3_readb(o) (__raw_readb(PCI_V3_VADDR + (unsigned int)(o))) +#define v3_writeb(o,v) __raw_writeb(v, pci_v3_base + (unsigned int)(o)) +#define v3_readb(o) (__raw_readb(pci_v3_base + (unsigned int)(o))) -#define v3_writew(o,v) __raw_writew(v, PCI_V3_VADDR + (unsigned int)(o)) -#define v3_readw(o) (__raw_readw(PCI_V3_VADDR + (unsigned int)(o))) +#define v3_writew(o,v) __raw_writew(v, pci_v3_base + (unsigned int)(o)) +#define v3_readw(o) (__raw_readw(pci_v3_base + (unsigned int)(o))) -#define v3_writel(o,v) __raw_writel(v, PCI_V3_VADDR + (unsigned int)(o)) -#define v3_readl(o) (__raw_readl(PCI_V3_VADDR + (unsigned int)(o))) +#define v3_writel(o,v) __raw_writel(v, pci_v3_base + (unsigned int)(o)) +#define v3_readl(o) (__raw_readl(pci_v3_base + (unsigned int)(o))) /*============================================================================ * @@ -165,19 +361,6 @@ */ static DEFINE_RAW_SPINLOCK(v3_lock); -#define PCI_BUS_NONMEM_START 0x00000000 -#define PCI_BUS_NONMEM_SIZE SZ_256M - -#define PCI_BUS_PREMEM_START PCI_BUS_NONMEM_START + PCI_BUS_NONMEM_SIZE -#define PCI_BUS_PREMEM_SIZE SZ_256M - -#if PCI_BUS_NONMEM_START & 0x000fffff -#error PCI_BUS_NONMEM_START must be megabyte aligned -#endif -#if PCI_BUS_PREMEM_START & 0x000fffff -#error PCI_BUS_PREMEM_START must be megabyte aligned -#endif - #undef V3_LB_BASE_PREFETCH #define V3_LB_BASE_PREFETCH 0 @@ -243,13 +426,13 @@ static void __iomem *v3_open_config_window(struct pci_bus *bus, * prefetchable), this frees up base1 for re-use by * configuration memory */ - v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) | + v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(non_mem.start) | V3_LB_BASE_ADR_SIZE_512MB | V3_LB_BASE_ENABLE); /* * Set up base1/map1 to point into configuration space. */ - v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_CONFIG_BASE) | + v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(conf_mem.start) | V3_LB_BASE_ADR_SIZE_16MB | V3_LB_BASE_ENABLE); v3_writew(V3_LB_MAP1, mapaddress); @@ -261,16 +444,16 @@ static void v3_close_config_window(void) /* * Reassign base1 for use by prefetchable PCI memory */ - v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE + SZ_256M) | + v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(pre_mem.start) | V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_PREFETCH | V3_LB_BASE_ENABLE); - v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(PCI_BUS_PREMEM_START) | + v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(pre_mem_pci) | V3_LB_MAP_TYPE_MEM_MULTIPLE); /* * And shrink base0 back to a 256M window (NOTE: MAP0 already correct) */ - v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) | + v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(non_mem.start) | V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_ENABLE); } @@ -337,25 +520,11 @@ static int v3_write_config(struct pci_bus *bus, unsigned int devfn, int where, return PCIBIOS_SUCCESSFUL; } -struct pci_ops pci_v3_ops = { +static struct pci_ops pci_v3_ops = { .read = v3_read_config, .write = v3_write_config, }; -static struct resource non_mem = { - .name = "PCI non-prefetchable", - .start = PHYS_PCI_MEM_BASE + PCI_BUS_NONMEM_START, - .end = PHYS_PCI_MEM_BASE + PCI_BUS_NONMEM_START + PCI_BUS_NONMEM_SIZE - 1, - .flags = IORESOURCE_MEM, -}; - -static struct resource pre_mem = { - .name = "PCI prefetchable", - .start = PHYS_PCI_MEM_BASE + PCI_BUS_PREMEM_START, - .end = PHYS_PCI_MEM_BASE + PCI_BUS_PREMEM_START + PCI_BUS_PREMEM_SIZE - 1, - .flags = IORESOURCE_MEM | IORESOURCE_PREFETCH, -}; - static int __init pci_v3_setup_resources(struct pci_sys_data *sys) { if (request_resource(&iomem_resource, &non_mem)) { @@ -471,7 +640,7 @@ static irqreturn_t v3_irq(int dummy, void *devid) return IRQ_HANDLED; } -int __init pci_v3_setup(int nr, struct pci_sys_data *sys) +static int __init pci_v3_setup(int nr, struct pci_sys_data *sys) { int ret = 0; @@ -479,7 +648,7 @@ int __init pci_v3_setup(int nr, struct pci_sys_data *sys) return -EINVAL; if (nr == 0) { - sys->mem_offset = PHYS_PCI_MEM_BASE; + sys->mem_offset = non_mem.start; ret = pci_v3_setup_resources(sys); } @@ -490,18 +659,10 @@ int __init pci_v3_setup(int nr, struct pci_sys_data *sys) * V3_LB_BASE? - local bus address * V3_LB_MAP? - pci bus address */ -void __init pci_v3_preinit(void) +static void __init pci_v3_preinit(void) { unsigned long flags; unsigned int temp; - int ret; - - /* Remap the Integrator system controller */ - ap_syscon_base = ioremap(INTEGRATOR_SC_BASE, 0x100); - if (!ap_syscon_base) { - pr_err("unable to remap the AP syscon for PCIv3\n"); - return; - } pcibios_min_mem = 0x00100000; @@ -525,25 +686,25 @@ void __init pci_v3_preinit(void) * Setup window 0 - PCI non-prefetchable memory * Local: 0x40000000 Bus: 0x00000000 Size: 256MB */ - v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) | + v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(non_mem.start) | V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_ENABLE); - v3_writew(V3_LB_MAP0, v3_addr_to_lb_map(PCI_BUS_NONMEM_START) | + v3_writew(V3_LB_MAP0, v3_addr_to_lb_map(non_mem_pci) | V3_LB_MAP_TYPE_MEM); /* * Setup window 1 - PCI prefetchable memory * Local: 0x50000000 Bus: 0x10000000 Size: 256MB */ - v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE + SZ_256M) | + v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(pre_mem.start) | V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_PREFETCH | V3_LB_BASE_ENABLE); - v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(PCI_BUS_PREMEM_START) | + v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(pre_mem_pci) | V3_LB_MAP_TYPE_MEM_MULTIPLE); /* * Setup window 2 - PCI IO */ - v3_writel(V3_LB_BASE2, v3_addr_to_lb_base2(PHYS_PCI_IO_BASE) | + v3_writel(V3_LB_BASE2, v3_addr_to_lb_base2(io_mem.start) | V3_LB_BASE_ENABLE); v3_writew(V3_LB_MAP2, v3_addr_to_lb_map2(0)); @@ -578,18 +739,10 @@ void __init pci_v3_preinit(void) v3_writeb(V3_LB_IMASK, 0x28); __raw_writel(3, ap_syscon_base + INTEGRATOR_SC_PCIENABLE_OFFSET); - /* - * Grab the PCI error interrupt. - */ - ret = request_irq(IRQ_AP_V3INT, v3_irq, 0, "V3", NULL); - if (ret) - printk(KERN_ERR "PCI: unable to grab PCI error " - "interrupt: %d\n", ret); - raw_spin_unlock_irqrestore(&v3_lock, flags); } -void __init pci_v3_postinit(void) +static void __init pci_v3_postinit(void) { unsigned int pci_cmd; @@ -608,5 +761,284 @@ void __init pci_v3_postinit(void) "interrupt: %d\n", ret); #endif - register_isa_ports(PHYS_PCI_MEM_BASE, PHYS_PCI_IO_BASE, 0); + register_isa_ports(non_mem.start, io_mem.start, 0); +} + +/* + * A small note about bridges and interrupts. The DECchip 21050 (and + * later) adheres to the PCI-PCI bridge specification. This says that + * the interrupts on the other side of a bridge are swizzled in the + * following manner: + * + * Dev Interrupt Interrupt + * Pin on Pin on + * Device Connector + * + * 4 A A + * B B + * C C + * D D + * + * 5 A B + * B C + * C D + * D A + * + * 6 A C + * B D + * C A + * D B + * + * 7 A D + * B A + * C B + * D C + * + * Where A = pin 1, B = pin 2 and so on and pin=0 = default = A. + * Thus, each swizzle is ((pin-1) + (device#-4)) % 4 + */ + +/* + * This routine handles multiple bridges. + */ +static u8 __init pci_v3_swizzle(struct pci_dev *dev, u8 *pinp) +{ + if (*pinp == 0) + *pinp = 1; + + return pci_common_swizzle(dev, pinp); +} + +static int irq_tab[4] __initdata = { + IRQ_AP_PCIINT0, IRQ_AP_PCIINT1, IRQ_AP_PCIINT2, IRQ_AP_PCIINT3 +}; + +/* + * map the specified device/slot/pin to an IRQ. This works out such + * that slot 9 pin 1 is INT0, pin 2 is INT1, and slot 10 pin 1 is INT1. + */ +static int __init pci_v3_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + int intnr = ((slot - 9) + (pin - 1)) & 3; + + return irq_tab[intnr]; +} + +static struct hw_pci pci_v3 __initdata = { + .swizzle = pci_v3_swizzle, + .setup = pci_v3_setup, + .nr_controllers = 1, + .ops = &pci_v3_ops, + .preinit = pci_v3_preinit, + .postinit = pci_v3_postinit, +}; + +#ifdef CONFIG_OF + +static int __init pci_v3_map_irq_dt(const struct pci_dev *dev, u8 slot, u8 pin) +{ + struct of_irq oirq; + int ret; + + ret = of_irq_map_pci(dev, &oirq); + if (ret) { + dev_err(&dev->dev, "of_irq_map_pci() %d\n", ret); + /* Proper return code 0 == NO_IRQ */ + return 0; + } + + return irq_create_of_mapping(oirq.controller, oirq.specifier, + oirq.size); +} + +static int __init pci_v3_dtprobe(struct platform_device *pdev, + struct device_node *np) +{ + struct of_pci_range_parser parser; + struct of_pci_range range; + struct resource *res; + int irq, ret; + + if (of_pci_range_parser_init(&parser, np)) + return -EINVAL; + + /* Get base for bridge registers */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "unable to obtain PCIv3 base\n"); + return -ENODEV; + } + pci_v3_base = devm_ioremap(&pdev->dev, res->start, + resource_size(res)); + if (!pci_v3_base) { + dev_err(&pdev->dev, "unable to remap PCIv3 base\n"); + return -ENODEV; + } + + /* Get and request error IRQ resource */ + irq = platform_get_irq(pdev, 0); + if (irq <= 0) { + dev_err(&pdev->dev, "unable to obtain PCIv3 error IRQ\n"); + return -ENODEV; + } + ret = devm_request_irq(&pdev->dev, irq, v3_irq, 0, + "PCIv3 error", NULL); + if (ret < 0) { + dev_err(&pdev->dev, "unable to request PCIv3 error IRQ %d (%d)\n", irq, ret); + return ret; + } + + for_each_of_pci_range(&parser, &range) { + if (!range.flags) { + of_pci_range_to_resource(&range, np, &conf_mem); + conf_mem.name = "PCIv3 config"; + } + if (range.flags & IORESOURCE_IO) { + of_pci_range_to_resource(&range, np, &io_mem); + io_mem.name = "PCIv3 I/O"; + } + if ((range.flags & IORESOURCE_MEM) && + !(range.flags & IORESOURCE_PREFETCH)) { + non_mem_pci = range.pci_addr; + non_mem_pci_sz = range.size; + of_pci_range_to_resource(&range, np, &non_mem); + non_mem.name = "PCIv3 non-prefetched mem"; + } + if ((range.flags & IORESOURCE_MEM) && + (range.flags & IORESOURCE_PREFETCH)) { + pre_mem_pci = range.pci_addr; + pre_mem_pci_sz = range.size; + of_pci_range_to_resource(&range, np, &pre_mem); + pre_mem.name = "PCIv3 prefetched mem"; + } + } + + if (!conf_mem.start || !io_mem.start || + !non_mem.start || !pre_mem.start) { + dev_err(&pdev->dev, "missing ranges in device node\n"); + return -EINVAL; + } + + pci_v3.map_irq = pci_v3_map_irq_dt; + pci_common_init_dev(&pdev->dev, &pci_v3); + + return 0; +} + +#else + +static inline int pci_v3_dtprobe(struct platform_device *pdev, + struct device_node *np) +{ + return -EINVAL; +} + +#endif + +static int __init pci_v3_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + int ret; + + /* Remap the Integrator system controller */ + ap_syscon_base = ioremap(INTEGRATOR_SC_BASE, 0x100); + if (!ap_syscon_base) { + dev_err(&pdev->dev, "unable to remap the AP syscon for PCIv3\n"); + return -ENODEV; + } + + /* Device tree probe path */ + if (np) + return pci_v3_dtprobe(pdev, np); + + pci_v3_base = devm_ioremap(&pdev->dev, PHYS_PCI_V3_BASE, SZ_64K); + if (!pci_v3_base) { + dev_err(&pdev->dev, "unable to remap PCIv3 base\n"); + return -ENODEV; + } + + ret = devm_request_irq(&pdev->dev, IRQ_AP_V3INT, v3_irq, 0, "V3", NULL); + if (ret) { + dev_err(&pdev->dev, "unable to grab PCI error interrupt: %d\n", + ret); + return -ENODEV; + } + + conf_mem.name = "PCIv3 config"; + conf_mem.start = PHYS_PCI_CONFIG_BASE; + conf_mem.end = PHYS_PCI_CONFIG_BASE + SZ_16M - 1; + conf_mem.flags = IORESOURCE_MEM; + + io_mem.name = "PCIv3 I/O"; + io_mem.start = PHYS_PCI_IO_BASE; + io_mem.end = PHYS_PCI_IO_BASE + SZ_16M - 1; + io_mem.flags = IORESOURCE_MEM; + + non_mem_pci = 0x00000000; + non_mem_pci_sz = SZ_256M; + non_mem.name = "PCIv3 non-prefetched mem"; + non_mem.start = PHYS_PCI_MEM_BASE; + non_mem.end = PHYS_PCI_MEM_BASE + SZ_256M - 1; + non_mem.flags = IORESOURCE_MEM; + + pre_mem_pci = 0x10000000; + pre_mem_pci_sz = SZ_256M; + pre_mem.name = "PCIv3 prefetched mem"; + pre_mem.start = PHYS_PCI_PRE_BASE + SZ_256M; + pre_mem.end = PHYS_PCI_PRE_BASE + SZ_256M - 1; + pre_mem.flags = IORESOURCE_MEM | IORESOURCE_PREFETCH; + + pci_v3.map_irq = pci_v3_map_irq; + + pci_common_init_dev(&pdev->dev, &pci_v3); + + return 0; +} + +static const struct of_device_id pci_ids[] = { + { .compatible = "v3,v360epc-pci", }, + {}, +}; + +static struct platform_driver pci_v3_driver = { + .driver = { + .name = "pci-v3", + .of_match_table = pci_ids, + }, +}; + +static int __init pci_v3_init(void) +{ + return platform_driver_probe(&pci_v3_driver, pci_v3_probe); +} + +subsys_initcall(pci_v3_init); + +/* + * Static mappings for the PCIv3 bridge + * + * e8000000 40000000 PCI memory PHYS_PCI_MEM_BASE (max 512M) + * ec000000 61000000 PCI config space PHYS_PCI_CONFIG_BASE (max 16M) + * fee00000 60000000 PCI IO PHYS_PCI_IO_BASE (max 16M) + */ +static struct map_desc pci_v3_io_desc[] __initdata __maybe_unused = { + { + .virtual = (unsigned long)PCI_MEMORY_VADDR, + .pfn = __phys_to_pfn(PHYS_PCI_MEM_BASE), + .length = SZ_16M, + .type = MT_DEVICE + }, { + .virtual = (unsigned long)PCI_CONFIG_VADDR, + .pfn = __phys_to_pfn(PHYS_PCI_CONFIG_BASE), + .length = SZ_16M, + .type = MT_DEVICE + } +}; + +int __init pci_v3_early_init(void) +{ + iotable_init(pci_v3_io_desc, ARRAY_SIZE(pci_v3_io_desc)); + vga_base = (unsigned long)PCI_MEMORY_VADDR; + pci_map_io_early(__phys_to_pfn(PHYS_PCI_IO_BASE)); + return 0; } |
