sa1100_cerf.c

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/*
 * drivers/pcmcia/sa1100_cerf.c
 *
 * PCMCIA implementation routines for CerfBoard
 * Based off the Assabet.
 *
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/gpio.h>

#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/irq.h>
#include <mach/cerf.h>
#include "sa1100_generic.h"

#define CERF_SOCKET 1

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

    ret = gpio_request_one(CERF_GPIO_CF_RESET, GPIOF_OUT_INIT_LOW, "CF_RESET");
    if (ret)
        return ret;

    skt->stat[SOC_STAT_CD].gpio = CERF_GPIO_CF_CD;
    skt->stat[SOC_STAT_CD].name = "CF_CD";
    skt->stat[SOC_STAT_BVD1].gpio = CERF_GPIO_CF_BVD1;
    skt->stat[SOC_STAT_BVD1].name = "CF_BVD1";
    skt->stat[SOC_STAT_BVD2].gpio = CERF_GPIO_CF_BVD2;
    skt->stat[SOC_STAT_BVD2].name = "CF_BVD2";
    skt->stat[SOC_STAT_RDY].gpio = CERF_GPIO_CF_IRQ;
    skt->stat[SOC_STAT_RDY].name = "CF_IRQ";

    return 0;
}

static void cerf_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
    gpio_free(CERF_GPIO_CF_RESET);
}

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

static int
cerf_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
                 const socket_state_t *state)
{
    switch (state->Vcc) {
    case 0:
    case 50:
    case 33:
        break;

    default:
        printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
            __func__, state->Vcc);
        return -1;
    }

    gpio_set_value(CERF_GPIO_CF_RESET, !!(state->flags & SS_RESET));

    return 0;
}

static struct pcmcia_low_level cerf_pcmcia_ops = { 
    .owner          = THIS_MODULE,
    .hw_init        = cerf_pcmcia_hw_init,
    .hw_shutdown        = cerf_pcmcia_hw_shutdown,
    .socket_state       = cerf_pcmcia_socket_state,
    .configure_socket   = cerf_pcmcia_configure_socket,
};

int __devinit pcmcia_cerf_init(struct device *dev)
{
    int ret = -ENODEV;

    if (machine_is_cerf())
        ret = sa11xx_drv_pcmcia_probe(dev, &cerf_pcmcia_ops, CERF_SOCKET, 1);

    return ret;
}