pxa2xx_e740.c

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/*
 * Toshiba e740 PCMCIA specific routines.
 *
 * (c) 2004 Ian Molton <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>

#include <mach/eseries-gpio.h>

#include <asm/irq.h>
#include <asm/mach-types.h>

#include "soc_common.h"

static int e740_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
    if (skt->nr == 0) {
        skt->stat[SOC_STAT_CD].gpio = GPIO_E740_PCMCIA_CD0;
        skt->stat[SOC_STAT_CD].name = "CF card detect";
        skt->stat[SOC_STAT_RDY].gpio = GPIO_E740_PCMCIA_RDY0;
        skt->stat[SOC_STAT_RDY].name = "CF ready";
    } else {
        skt->stat[SOC_STAT_CD].gpio = GPIO_E740_PCMCIA_CD1;
        skt->stat[SOC_STAT_CD].name = "Wifi switch";
        skt->stat[SOC_STAT_RDY].gpio = GPIO_E740_PCMCIA_RDY1;
        skt->stat[SOC_STAT_RDY].name = "Wifi ready";
    }

    return 0;
}

static void e740_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
                    struct pcmcia_state *state)
{
    state->vs_3v  = 1;
    state->vs_Xv  = 0;
}

static int e740_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
                    const socket_state_t *state)
{
    if (state->flags & SS_RESET) {
        if (skt->nr == 0)
            gpio_set_value(GPIO_E740_PCMCIA_RST0, 1);
        else
            gpio_set_value(GPIO_E740_PCMCIA_RST1, 1);
    } else {
        if (skt->nr == 0)
            gpio_set_value(GPIO_E740_PCMCIA_RST0, 0);
        else
            gpio_set_value(GPIO_E740_PCMCIA_RST1, 0);
    }

    switch (state->Vcc) {
    case 0: /* Socket off */
        if (skt->nr == 0)
            gpio_set_value(GPIO_E740_PCMCIA_PWR0, 0);
        else
            gpio_set_value(GPIO_E740_PCMCIA_PWR1, 1);
        break;
    case 50:
    case 33: /* socket on */
        if (skt->nr == 0)
            gpio_set_value(GPIO_E740_PCMCIA_PWR0, 1);
        else
            gpio_set_value(GPIO_E740_PCMCIA_PWR1, 0);
        break;
    default:
        printk(KERN_ERR "e740_cs: Unsupported Vcc: %d\n", state->Vcc);
    }

    return 0;
}

static struct pcmcia_low_level e740_pcmcia_ops = {
    .owner            = THIS_MODULE,
    .hw_init          = e740_pcmcia_hw_init,
    .socket_state     = e740_pcmcia_socket_state,
    .configure_socket = e740_pcmcia_configure_socket,
    .nr               = 2,
};

static struct platform_device *e740_pcmcia_device;

static int __init e740_pcmcia_init(void)
{
    int ret;

    if (!machine_is_e740())
        return -ENODEV;

    e740_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
    if (!e740_pcmcia_device)
        return -ENOMEM;

    ret = platform_device_add_data(e740_pcmcia_device, &e740_pcmcia_ops,
                    sizeof(e740_pcmcia_ops));

    if (!ret)
        ret = platform_device_add(e740_pcmcia_device);

    if (ret)
        platform_device_put(e740_pcmcia_device);

    return ret;
}

static void __exit e740_pcmcia_exit(void)
{
    platform_device_unregister(e740_pcmcia_device);
}

module_init(e740_pcmcia_init);
module_exit(e740_pcmcia_exit);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Ian Molton <[email protected]>");
MODULE_ALIAS("platform:pxa2xx-pcmcia");
MODULE_DESCRIPTION("e740 PCMCIA platform support");