sa1100_assabet.c

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/*
 * drivers/pcmcia/sa1100_assabet.c
 *
 * PCMCIA implementation routines for Assabet
 *
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/gpio.h>

#include <asm/mach-types.h>
#include <mach/assabet.h>

#include "sa1100_generic.h"

static int assabet_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
    skt->stat[SOC_STAT_CD].gpio = ASSABET_GPIO_CF_CD;
    skt->stat[SOC_STAT_CD].name = "CF CD";
    skt->stat[SOC_STAT_BVD1].gpio = ASSABET_GPIO_CF_BVD1;
    skt->stat[SOC_STAT_BVD1].name = "CF BVD1";
    skt->stat[SOC_STAT_BVD2].gpio = ASSABET_GPIO_CF_BVD2;
    skt->stat[SOC_STAT_BVD2].name = "CF BVD2";
    skt->stat[SOC_STAT_RDY].gpio = ASSABET_GPIO_CF_IRQ;
    skt->stat[SOC_STAT_RDY].name = "CF RDY";

    return 0;
}

static void
assabet_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
{
    state->vs_3v  = 1; /* Can only apply 3.3V on Assabet. */
    state->vs_Xv  = 0;
}

static int
assabet_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
{
    unsigned int mask;

    switch (state->Vcc) {
    case 0:
        mask = 0;
        break;

    case 50:
        printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V...\n",
            __func__);

    case 33:  /* Can only apply 3.3V to the CF slot. */
        mask = ASSABET_BCR_CF_PWR;
        break;

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

    /* Silently ignore Vpp, speaker enable. */

    if (state->flags & SS_RESET)
        mask |= ASSABET_BCR_CF_RST;
    if (!(state->flags & SS_OUTPUT_ENA))
        mask |= ASSABET_BCR_CF_BUS_OFF;

    ASSABET_BCR_frob(ASSABET_BCR_CF_RST | ASSABET_BCR_CF_PWR |
            ASSABET_BCR_CF_BUS_OFF, mask);

    return 0;
}

/*
 * Disable card status IRQs on suspend.
 */
static void assabet_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
    /*
     * Tristate the CF bus signals.  Also assert CF
     * reset as per user guide page 4-11.
     */
    ASSABET_BCR_set(ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_CF_RST);
}

static struct pcmcia_low_level assabet_pcmcia_ops = { 
    .owner          = THIS_MODULE,
    .hw_init        = assabet_pcmcia_hw_init,
    .socket_state       = assabet_pcmcia_socket_state,
    .configure_socket   = assabet_pcmcia_configure_socket,
    .socket_suspend     = assabet_pcmcia_socket_suspend,
};

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

    if (machine_is_assabet() && !machine_has_neponset())
        ret = sa11xx_drv_pcmcia_probe(dev, &assabet_pcmcia_ops, 1, 1);

    return ret;
}