LXR linux/arch/mips/sibyte/swarm/platform.c

   1#include <linux/err.h>
   2#include <linux/kernel.h>
   3#include <linux/init.h>
   4#include <linux/io.h>
   5#include <linux/platform_device.h>
   6#include <linux/ata_platform.h>
   7
   8#include <asm/sibyte/board.h>
   9#include <asm/sibyte/sb1250_genbus.h>
  10#include <asm/sibyte/sb1250_regs.h>
  11
  12#if defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_LITTLESUR)
  13
  14#define DRV_NAME        "pata-swarm"
  15
  16#define SWARM_IDE_SHIFT 5
  17#define SWARM_IDE_BASE  0x1f0
  18#define SWARM_IDE_CTRL  0x3f6
  19
  20static struct resource swarm_pata_resource[] = {
  21        {
  22                .name   = "Swarm GenBus IDE",
  23                .flags  = IORESOURCE_MEM,
  24        }, {
  25                .name   = "Swarm GenBus IDE",
  26                .flags  = IORESOURCE_MEM,
  27        }, {
  28                .name   = "Swarm GenBus IDE",
  29                .flags  = IORESOURCE_IRQ,
  30                .start  = K_INT_GB_IDE,
  31                .end    = K_INT_GB_IDE,
  32        },
  33};
  34
  35static struct pata_platform_info pata_platform_data = {
  36        .ioport_shift   = SWARM_IDE_SHIFT,
  37};
  38
  39static struct platform_device swarm_pata_device = {
  40        .name           = "pata_platform",
  41        .id             = -1,
  42        .resource       = swarm_pata_resource,
  43        .num_resources  = ARRAY_SIZE(swarm_pata_resource),
  44        .dev  = {
  45                .platform_data          = &pata_platform_data,
  46                .coherent_dma_mask      = ~0,   /* grumble */
  47        },
  48};
  49
  50static int __init swarm_pata_init(void)
  51{
  52        u8 __iomem *base;
  53        phys_t offset, size;
  54        struct resource *r;
  55
  56        if (!SIBYTE_HAVE_IDE)
  57                return -ENODEV;
  58
  59        base = ioremap(A_IO_EXT_BASE, 0x800);
  60        offset = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_START_ADDR, IDE_CS));
  61        size = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_MULT_SIZE, IDE_CS));
  62        iounmap(base);
  63
  64        offset = G_IO_START_ADDR(offset) << S_IO_ADDRBASE;
  65        size = (G_IO_MULT_SIZE(size) + 1) << S_IO_REGSIZE;
  66        if (offset < A_PHYS_GENBUS || offset >= A_PHYS_GENBUS_END) {
  67                pr_info(DRV_NAME ": PATA interface at GenBus disabled\n");
  68
  69                return -EBUSY;
  70        }
  71
  72        pr_info(DRV_NAME ": PATA interface at GenBus slot %i\n", IDE_CS);
  73
  74        r = swarm_pata_resource;
  75        r[0].start = offset + (SWARM_IDE_BASE << SWARM_IDE_SHIFT);
  76        r[0].end   = offset + ((SWARM_IDE_BASE + 8) << SWARM_IDE_SHIFT) - 1;
  77        r[1].start = offset + (SWARM_IDE_CTRL << SWARM_IDE_SHIFT);
  78        r[1].end   = offset + ((SWARM_IDE_CTRL + 1) << SWARM_IDE_SHIFT) - 1;
  79
  80        return platform_device_register(&swarm_pata_device);
  81}
  82
  83device_initcall(swarm_pata_init);
  84
  85#endif /* defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_LITTLESUR) */
  86