dev-pcmcia.c

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/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2008 Maxime Bizon <[email protected]>
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <asm/bootinfo.h>
#include <linux/platform_device.h>
#include <bcm63xx_cs.h>
#include <bcm63xx_cpu.h>
#include <bcm63xx_dev_pcmcia.h>
#include <bcm63xx_io.h>
#include <bcm63xx_regs.h>

static struct resource pcmcia_resources[] = {
    /* pcmcia registers */
    {
        /* start & end filled at runtime */
        .flags      = IORESOURCE_MEM,
    },

    /* pcmcia memory zone resources */
    {
        .start      = BCM_PCMCIA_COMMON_BASE_PA,
        .end        = BCM_PCMCIA_COMMON_END_PA,
        .flags      = IORESOURCE_MEM,
    },
    {
        .start      = BCM_PCMCIA_ATTR_BASE_PA,
        .end        = BCM_PCMCIA_ATTR_END_PA,
        .flags      = IORESOURCE_MEM,
    },
    {
        .start      = BCM_PCMCIA_IO_BASE_PA,
        .end        = BCM_PCMCIA_IO_END_PA,
        .flags      = IORESOURCE_MEM,
    },

    /* PCMCIA irq */
    {
        /* start filled at runtime */
        .flags      = IORESOURCE_IRQ,
    },

    /* declare PCMCIA IO resource also */
    {
        .start      = BCM_PCMCIA_IO_BASE_PA,
        .end        = BCM_PCMCIA_IO_END_PA,
        .flags      = IORESOURCE_IO,
    },
};

static struct bcm63xx_pcmcia_platform_data pd;

static struct platform_device bcm63xx_pcmcia_device = {
    .name       = "bcm63xx_pcmcia",
    .id     = 0,
    .num_resources  = ARRAY_SIZE(pcmcia_resources),
    .resource   = pcmcia_resources,
    .dev        = {
        .platform_data = &pd,
    },
};

static int __init config_pcmcia_cs(unsigned int cs,
                   u32 base, unsigned int size)
{
    int ret;

    ret = bcm63xx_set_cs_status(cs, 0);
    if (!ret)
        ret = bcm63xx_set_cs_base(cs, base, size);
    if (!ret)
        ret = bcm63xx_set_cs_status(cs, 1);
    return ret;
}

static const struct {
    unsigned int    cs;
    unsigned int    base;
    unsigned int    size;
} pcmcia_cs[3] __initconst = {
    {
        .cs = MPI_CS_PCMCIA_COMMON,
        .base   = BCM_PCMCIA_COMMON_BASE_PA,
        .size   = BCM_PCMCIA_COMMON_SIZE
    },
    {
        .cs = MPI_CS_PCMCIA_ATTR,
        .base   = BCM_PCMCIA_ATTR_BASE_PA,
        .size   = BCM_PCMCIA_ATTR_SIZE
    },
    {
        .cs = MPI_CS_PCMCIA_IO,
        .base   = BCM_PCMCIA_IO_BASE_PA,
        .size   = BCM_PCMCIA_IO_SIZE
    },
};

int __init bcm63xx_pcmcia_register(void)
{
    int ret, i;

    if (!BCMCPU_IS_6348() && !BCMCPU_IS_6358())
        return 0;

    /* use correct pcmcia ready gpio depending on processor */
    switch (bcm63xx_get_cpu_id()) {
    case BCM6348_CPU_ID:
        pd.ready_gpio = 22;
        break;

    case BCM6358_CPU_ID:
        pd.ready_gpio = 18;
        break;

    default:
        return -ENODEV;
    }

    pcmcia_resources[0].start = bcm63xx_regset_address(RSET_PCMCIA);
    pcmcia_resources[0].end = pcmcia_resources[0].start +
        RSET_PCMCIA_SIZE - 1;
    pcmcia_resources[4].start = bcm63xx_get_irq_number(IRQ_PCMCIA);

    /* configure pcmcia chip selects */
    for (i = 0; i < 3; i++) {
        ret = config_pcmcia_cs(pcmcia_cs[i].cs,
                       pcmcia_cs[i].base,
                       pcmcia_cs[i].size);
        if (ret)
            goto out_err;
    }

    return platform_device_register(&bcm63xx_pcmcia_device);

out_err:
    printk(KERN_ERR "unable to set pcmcia chip select\n");
    return ret;
}