platform.c

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#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/ata_platform.h>

#include <asm/sibyte/board.h>
#include <asm/sibyte/sb1250_genbus.h>
#include <asm/sibyte/sb1250_regs.h>

#if defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_LITTLESUR)

#define DRV_NAME    "pata-swarm"

#define SWARM_IDE_SHIFT 5
#define SWARM_IDE_BASE  0x1f0
#define SWARM_IDE_CTRL  0x3f6

static struct resource swarm_pata_resource[] = {
    {
        .name   = "Swarm GenBus IDE",
        .flags  = IORESOURCE_MEM,
    }, {
        .name   = "Swarm GenBus IDE",
        .flags  = IORESOURCE_MEM,
    }, {
        .name   = "Swarm GenBus IDE",
        .flags  = IORESOURCE_IRQ,
        .start  = K_INT_GB_IDE,
        .end    = K_INT_GB_IDE,
    },
};

static struct pata_platform_info pata_platform_data = {
    .ioport_shift   = SWARM_IDE_SHIFT,
};

static struct platform_device swarm_pata_device = {
    .name       = "pata_platform",
    .id     = -1,
    .resource   = swarm_pata_resource,
    .num_resources  = ARRAY_SIZE(swarm_pata_resource),
    .dev  = {
        .platform_data      = &pata_platform_data,
        .coherent_dma_mask  = ~0,   /* grumble */
    },
};

static int __init swarm_pata_init(void)
{
    u8 __iomem *base;
    phys_t offset, size;
    struct resource *r;

    if (!SIBYTE_HAVE_IDE)
        return -ENODEV;

    base = ioremap(A_IO_EXT_BASE, 0x800);
    offset = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_START_ADDR, IDE_CS));
    size = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_MULT_SIZE, IDE_CS));
    iounmap(base);

    offset = G_IO_START_ADDR(offset) << S_IO_ADDRBASE;
    size = (G_IO_MULT_SIZE(size) + 1) << S_IO_REGSIZE;
    if (offset < A_PHYS_GENBUS || offset >= A_PHYS_GENBUS_END) {
        pr_info(DRV_NAME ": PATA interface at GenBus disabled\n");

        return -EBUSY;
    }

    pr_info(DRV_NAME ": PATA interface at GenBus slot %i\n", IDE_CS);

    r = swarm_pata_resource;
    r[0].start = offset + (SWARM_IDE_BASE << SWARM_IDE_SHIFT);
    r[0].end   = offset + ((SWARM_IDE_BASE + 8) << SWARM_IDE_SHIFT) - 1;
    r[1].start = offset + (SWARM_IDE_CTRL << SWARM_IDE_SHIFT);
    r[1].end   = offset + ((SWARM_IDE_CTRL + 1) << SWARM_IDE_SHIFT) - 1;

    return platform_device_register(&swarm_pata_device);
}

device_initcall(swarm_pata_init);

#endif /* defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_LITTLESUR) */

#define sb1250_dev_struct(num) \
    static struct resource sb1250_res##num = {      \
        .name = "SB1250 MAC " __stringify(num),     \
        .flags = IORESOURCE_MEM,        \
        .start = A_MAC_CHANNEL_BASE(num),   \
        .end = A_MAC_CHANNEL_BASE(num + 1) -1,  \
    };\
    static struct platform_device sb1250_dev##num = {   \
        .name = "sb1250-mac",           \
    .id = num,                  \
    .resource = &sb1250_res##num,           \
    .num_resources = 1,             \
    }

sb1250_dev_struct(0);
sb1250_dev_struct(1);
sb1250_dev_struct(2);
sb1250_dev_struct(3);

static struct platform_device *sb1250_devs[] __initdata = {
    &sb1250_dev0,
    &sb1250_dev1,
    &sb1250_dev2,
    &sb1250_dev3,
};

static int __init sb1250_device_init(void)
{
    int ret;

    /* Set the number of available units based on the SOC type.  */
    switch (soc_type) {
    case K_SYS_SOC_TYPE_BCM1250:
    case K_SYS_SOC_TYPE_BCM1250_ALT:
        ret = platform_add_devices(sb1250_devs, 3);
        break;
    case K_SYS_SOC_TYPE_BCM1120:
    case K_SYS_SOC_TYPE_BCM1125:
    case K_SYS_SOC_TYPE_BCM1125H:
    case K_SYS_SOC_TYPE_BCM1250_ALT2:       /* Hybrid */
        ret = platform_add_devices(sb1250_devs, 2);
        break;
    case K_SYS_SOC_TYPE_BCM1x55:
    case K_SYS_SOC_TYPE_BCM1x80:
        ret = platform_add_devices(sb1250_devs, 4);
        break;
    default:
        ret = -ENODEV;
        break;
    }
    return ret;
}
device_initcall(sb1250_device_init);