sa1100_h3600.c

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/*
 * drivers/pcmcia/sa1100_h3600.c
 *
 * PCMCIA implementation routines for H3600
 *
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/gpio.h>

#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include <mach/h3xxx.h>

#include "sa1100_generic.h"

static int h3600_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
    int err;

    switch (skt->nr) {
    case 0:
        skt->stat[SOC_STAT_CD].gpio = H3XXX_GPIO_PCMCIA_CD0;
        skt->stat[SOC_STAT_CD].name = "PCMCIA CD0";
        skt->stat[SOC_STAT_RDY].gpio = H3XXX_GPIO_PCMCIA_IRQ0;
        skt->stat[SOC_STAT_RDY].name = "PCMCIA IRQ0";

        err = gpio_request(H3XXX_EGPIO_OPT_NVRAM_ON, "OPT NVRAM ON");
        if (err)
            goto err01;
        err = gpio_direction_output(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
        if (err)
            goto err03;
        err = gpio_request(H3XXX_EGPIO_OPT_ON, "OPT ON");
        if (err)
            goto err03;
        err = gpio_direction_output(H3XXX_EGPIO_OPT_ON, 0);
        if (err)
            goto err04;
        err = gpio_request(H3XXX_EGPIO_OPT_RESET, "OPT RESET");
        if (err)
            goto err04;
        err = gpio_direction_output(H3XXX_EGPIO_OPT_RESET, 0);
        if (err)
            goto err05;
        err = gpio_request(H3XXX_EGPIO_CARD_RESET, "PCMCIA CARD RESET");
        if (err)
            goto err05;
        err = gpio_direction_output(H3XXX_EGPIO_CARD_RESET, 0);
        if (err)
            goto err06;
        break;
    case 1:
        skt->stat[SOC_STAT_CD].gpio = H3XXX_GPIO_PCMCIA_CD1;
        skt->stat[SOC_STAT_CD].name = "PCMCIA CD1";
        skt->stat[SOC_STAT_RDY].gpio = H3XXX_GPIO_PCMCIA_IRQ1;
        skt->stat[SOC_STAT_RDY].name = "PCMCIA IRQ1";
        break;
    }
    return 0;

err06:  gpio_free(H3XXX_EGPIO_CARD_RESET);
err05:  gpio_free(H3XXX_EGPIO_OPT_RESET);
err04:  gpio_free(H3XXX_EGPIO_OPT_ON);
err03:  gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
err01:  gpio_free(H3XXX_GPIO_PCMCIA_IRQ0);
    return err;
}

static void h3600_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
    switch (skt->nr) {
    case 0:
        /* Disable CF bus: */
        gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
        gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
        gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);

        gpio_free(H3XXX_EGPIO_CARD_RESET);
        gpio_free(H3XXX_EGPIO_OPT_RESET);
        gpio_free(H3XXX_EGPIO_OPT_ON);
        gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
        break;
    case 1:
        break;
    }
}

static void
h3600_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
{
    state->bvd1 = 0;
    state->bvd2 = 0;
    state->vs_3v = 0;
    state->vs_Xv = 0;
}

static int
h3600_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
{
    if (state->Vcc != 0 && state->Vcc != 33 && state->Vcc != 50) {
        printk(KERN_ERR "h3600_pcmcia: unrecognized Vcc %u.%uV\n",
               state->Vcc / 10, state->Vcc % 10);
        return -1;
    }

    gpio_set_value(H3XXX_EGPIO_CARD_RESET, !!(state->flags & SS_RESET));

    /* Silently ignore Vpp, output enable, speaker enable. */

    return 0;
}

static void h3600_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
    /* Enable CF bus: */
    gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 1);
    gpio_set_value(H3XXX_EGPIO_OPT_ON, 1);
    gpio_set_value(H3XXX_EGPIO_OPT_RESET, 0);

    msleep(10);
}

static void h3600_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
    /*
     * FIXME:  This doesn't fit well.  We don't have the mechanism in
     * the generic PCMCIA layer to deal with the idea of two sockets
     * on one bus.  We rely on the cs.c behaviour shutting down
     * socket 0 then socket 1.
     */
    if (skt->nr == 1) {
        gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
        gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
        /* hmm, does this suck power? */
        gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);
    }
}

struct pcmcia_low_level h3600_pcmcia_ops = { 
    .owner          = THIS_MODULE,
    .hw_init        = h3600_pcmcia_hw_init,
    .hw_shutdown        = h3600_pcmcia_hw_shutdown,
    .socket_state       = h3600_pcmcia_socket_state,
    .configure_socket   = h3600_pcmcia_configure_socket,

    .socket_init        = h3600_pcmcia_socket_init,
    .socket_suspend     = h3600_pcmcia_socket_suspend,
};

int __devinit pcmcia_h3600_init(struct device *dev)
{
    int ret = -ENODEV;

    if (machine_is_h3600() || machine_is_h3100())
        ret = sa11xx_drv_pcmcia_probe(dev, &h3600_pcmcia_ops, 0, 2);

    return ret;
}