pxa2xx_palmtx.c

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/*
 * linux/drivers/pcmcia/pxa2xx_palmtx.c
 *
 * Driver for Palm T|X PCMCIA
 *
 * Copyright (C) 2007-2011 Marek Vasut <[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/module.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>

#include <asm/mach-types.h>
#include <mach/palmtx.h>
#include "soc_common.h"

static struct gpio palmtx_pcmcia_gpios[] = {
    { GPIO_NR_PALMTX_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" },
    { GPIO_NR_PALMTX_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" },
    { GPIO_NR_PALMTX_PCMCIA_RESET,  GPIOF_INIT_HIGH,"PCMCIA Reset" },
};

static int palmtx_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
    int ret;

    ret = gpio_request_array(palmtx_pcmcia_gpios,
                ARRAY_SIZE(palmtx_pcmcia_gpios));

    skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMTX_PCMCIA_READY;
    skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";

    return ret;
}

static void palmtx_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
    gpio_free_array(palmtx_pcmcia_gpios, ARRAY_SIZE(palmtx_pcmcia_gpios));
}

static void palmtx_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
                    struct pcmcia_state *state)
{
    state->detect = 1; /* always inserted */
    state->vs_3v  = 1;
    state->vs_Xv  = 0;
}

static int
palmtx_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
                const socket_state_t *state)
{
    gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER1, 1);
    gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER2, 1);
    gpio_set_value(GPIO_NR_PALMTX_PCMCIA_RESET,
            !!(state->flags & SS_RESET));

    return 0;
}

static struct pcmcia_low_level palmtx_pcmcia_ops = {
    .owner          = THIS_MODULE,

    .first          = 0,
    .nr         = 1,

    .hw_init        = palmtx_pcmcia_hw_init,
    .hw_shutdown        = palmtx_pcmcia_hw_shutdown,

    .socket_state       = palmtx_pcmcia_socket_state,
    .configure_socket   = palmtx_pcmcia_configure_socket,
};

static struct platform_device *palmtx_pcmcia_device;

static int __init palmtx_pcmcia_init(void)
{
    int ret;

    if (!machine_is_palmtx())
        return -ENODEV;

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

    ret = platform_device_add_data(palmtx_pcmcia_device, &palmtx_pcmcia_ops,
                    sizeof(palmtx_pcmcia_ops));

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

    if (ret)
        platform_device_put(palmtx_pcmcia_device);

    return ret;
}

static void __exit palmtx_pcmcia_exit(void)
{
    platform_device_unregister(palmtx_pcmcia_device);
}

module_init(palmtx_pcmcia_init);
module_exit(palmtx_pcmcia_exit);

MODULE_AUTHOR("Marek Vasut <[email protected]>");
MODULE_DESCRIPTION("PCMCIA support for Palm T|X");
MODULE_ALIAS("platform:pxa2xx-pcmcia");
MODULE_LICENSE("GPL");