pxa2xx_vpac270.c

Go to the documentation of this file.

/*
 * linux/drivers/pcmcia/pxa2xx_vpac270.c
 *
 * Driver for Voipac PXA270 PCMCIA and CF sockets
 *
 * Copyright (C) 2010-2011 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/gpio.h>
#include <linux/module.h>
#include <linux/platform_device.h>

#include <asm/mach-types.h>

#include <asm/gpio.h>
#include <mach/vpac270.h>

#include "soc_common.h"

static struct gpio vpac270_pcmcia_gpios[] = {
    { GPIO107_VPAC270_PCMCIA_PPEN,  GPIOF_INIT_LOW, "PCMCIA PPEN" },
    { GPIO11_VPAC270_PCMCIA_RESET,  GPIOF_INIT_LOW, "PCMCIA Reset" },
};

static struct gpio vpac270_cf_gpios[] = {
    { GPIO16_VPAC270_CF_RESET,  GPIOF_INIT_LOW, "CF Reset" },
};

static int vpac270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
    int ret;

    if (skt->nr == 0) {
        ret = gpio_request_array(vpac270_pcmcia_gpios,
                ARRAY_SIZE(vpac270_pcmcia_gpios));

        skt->stat[SOC_STAT_CD].gpio = GPIO84_VPAC270_PCMCIA_CD;
        skt->stat[SOC_STAT_CD].name = "PCMCIA CD";
        skt->stat[SOC_STAT_RDY].gpio = GPIO35_VPAC270_PCMCIA_RDY;
        skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
    } else {
        ret = gpio_request_array(vpac270_cf_gpios,
                ARRAY_SIZE(vpac270_cf_gpios));

        skt->stat[SOC_STAT_CD].gpio = GPIO17_VPAC270_CF_CD;
        skt->stat[SOC_STAT_CD].name = "CF CD";
        skt->stat[SOC_STAT_RDY].gpio = GPIO12_VPAC270_CF_RDY;
        skt->stat[SOC_STAT_RDY].name = "CF Ready";
    }

    return ret;
}

static void vpac270_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
    if (skt->nr == 0)
        gpio_free_array(vpac270_pcmcia_gpios,
                    ARRAY_SIZE(vpac270_pcmcia_gpios));
    else
        gpio_free_array(vpac270_cf_gpios,
                    ARRAY_SIZE(vpac270_cf_gpios));
}

static void vpac270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
                    struct pcmcia_state *state)
{
    state->vs_3v  = 1;
    state->vs_Xv  = 0;
}

static int
vpac270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
                const socket_state_t *state)
{
    if (skt->nr == 0) {
        gpio_set_value(GPIO11_VPAC270_PCMCIA_RESET,
            (state->flags & SS_RESET));
        gpio_set_value(GPIO107_VPAC270_PCMCIA_PPEN,
            !(state->Vcc == 33 || state->Vcc == 50));
    } else {
        gpio_set_value(GPIO16_VPAC270_CF_RESET,
            (state->flags & SS_RESET));
    }

    return 0;
}

static struct pcmcia_low_level vpac270_pcmcia_ops = {
    .owner          = THIS_MODULE,

    .first          = 0,
    .nr         = 2,

    .hw_init        = vpac270_pcmcia_hw_init,
    .hw_shutdown        = vpac270_pcmcia_hw_shutdown,

    .socket_state       = vpac270_pcmcia_socket_state,
    .configure_socket   = vpac270_pcmcia_configure_socket,
};

static struct platform_device *vpac270_pcmcia_device;

static int __init vpac270_pcmcia_init(void)
{
    int ret;

    if (!machine_is_vpac270())
        return -ENODEV;

    vpac270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
    if (!vpac270_pcmcia_device)
        return -ENOMEM;

    ret = platform_device_add_data(vpac270_pcmcia_device,
        &vpac270_pcmcia_ops, sizeof(vpac270_pcmcia_ops));

    if (!ret)
        ret = platform_device_add(vpac270_pcmcia_device);

    if (ret)
        platform_device_put(vpac270_pcmcia_device);

    return ret;
}

static void __exit vpac270_pcmcia_exit(void)
{
    platform_device_unregister(vpac270_pcmcia_device);
}

module_init(vpac270_pcmcia_init);
module_exit(vpac270_pcmcia_exit);

MODULE_AUTHOR("Marek Vasut <[email protected]>");
MODULE_DESCRIPTION("PCMCIA support for Voipac PXA270");
MODULE_ALIAS("platform:pxa2xx-pcmcia");
MODULE_LICENSE("GPL");