pxa2xx_cm_x255.c

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/*
 * linux/drivers/pcmcia/pxa/pxa_cm_x255.c
 *
 * 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.
 *
 * Compulab Ltd., 2003, 2007, 2008
 * Mike Rapoport <[email protected]>
 *
 */

#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/export.h>

#include "soc_common.h"

#define GPIO_PCMCIA_SKTSEL  (54)
#define GPIO_PCMCIA_S0_CD_VALID (16)
#define GPIO_PCMCIA_S1_CD_VALID (17)
#define GPIO_PCMCIA_S0_RDYINT   (6)
#define GPIO_PCMCIA_S1_RDYINT   (8)
#define GPIO_PCMCIA_RESET   (9)

static int cmx255_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
    int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
    if (ret)
        return ret;
    gpio_direction_output(GPIO_PCMCIA_RESET, 0);

    if (skt->nr == 0) {
        skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S0_CD_VALID;
        skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
        skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S0_RDYINT;
        skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
    } else {
        skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S1_CD_VALID;
        skt->stat[SOC_STAT_CD].name = "PCMCIA1 CD";
        skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S1_RDYINT;
        skt->stat[SOC_STAT_RDY].name = "PCMCIA1 RDY";
    }

    return 0;
}

static void cmx255_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
{
    gpio_free(GPIO_PCMCIA_RESET);
}


static void cmx255_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
                       struct pcmcia_state *state)
{
    state->vs_3v  = 0;
    state->vs_Xv  = 0;
}


static int cmx255_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
                      const socket_state_t *state)
{
    switch (skt->nr) {
    case 0:
        if (state->flags & SS_RESET) {
            gpio_set_value(GPIO_PCMCIA_SKTSEL, 0);
            udelay(1);
            gpio_set_value(GPIO_PCMCIA_RESET, 1);
            udelay(10);
            gpio_set_value(GPIO_PCMCIA_RESET, 0);
        }
        break;
    case 1:
        if (state->flags & SS_RESET) {
            gpio_set_value(GPIO_PCMCIA_SKTSEL, 1);
            udelay(1);
            gpio_set_value(GPIO_PCMCIA_RESET, 1);
            udelay(10);
            gpio_set_value(GPIO_PCMCIA_RESET, 0);
        }
        break;
    }

    return 0;
}

static struct pcmcia_low_level cmx255_pcmcia_ops __initdata = {
    .owner          = THIS_MODULE,
    .hw_init        = cmx255_pcmcia_hw_init,
    .hw_shutdown        = cmx255_pcmcia_shutdown,
    .socket_state       = cmx255_pcmcia_socket_state,
    .configure_socket   = cmx255_pcmcia_configure_socket,
    .nr         = 1,
};

static struct platform_device *cmx255_pcmcia_device;

int __init cmx255_pcmcia_init(void)
{
    int ret;

    cmx255_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);

    if (!cmx255_pcmcia_device)
        return -ENOMEM;

    ret = platform_device_add_data(cmx255_pcmcia_device, &cmx255_pcmcia_ops,
                       sizeof(cmx255_pcmcia_ops));

    if (ret == 0) {
        printk(KERN_INFO "Registering cm-x255 PCMCIA interface.\n");
        ret = platform_device_add(cmx255_pcmcia_device);
    }

    if (ret)
        platform_device_put(cmx255_pcmcia_device);

    return ret;
}

void __exit cmx255_pcmcia_exit(void)
{
    platform_device_unregister(cmx255_pcmcia_device);
}