sa1100_shannon.c

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/*
 * drivers/pcmcia/sa1100_shannon.c
 *
 * PCMCIA implementation routines for Shannon
 *
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/io.h>

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

static int shannon_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
    /* All those are inputs */
    GAFR &= ~(GPIO_GPIO(SHANNON_GPIO_EJECT_0) |
          GPIO_GPIO(SHANNON_GPIO_EJECT_1) |
          GPIO_GPIO(SHANNON_GPIO_RDY_0) |
          GPIO_GPIO(SHANNON_GPIO_RDY_1));

    if (skt->nr == 0) {
        skt->stat[SOC_STAT_CD].gpio = SHANNON_GPIO_EJECT_0;
        skt->stat[SOC_STAT_CD].name = "PCMCIA_CD_0";
        skt->stat[SOC_STAT_RDY].gpio = SHANNON_GPIO_RDY_0;
        skt->stat[SOC_STAT_RDY].name = "PCMCIA_RDY_0";
    } else {
        skt->stat[SOC_STAT_CD].gpio = SHANNON_GPIO_EJECT_1;
        skt->stat[SOC_STAT_CD].name = "PCMCIA_CD_1";
        skt->stat[SOC_STAT_RDY].gpio = SHANNON_GPIO_RDY_1;
        skt->stat[SOC_STAT_RDY].name = "PCMCIA_RDY_1";
    }

    return 0;
}

static void
shannon_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
                struct pcmcia_state *state)
{
    switch (skt->nr) {
    case 0:
        state->bvd1   = 1; 
        state->bvd2   = 1; 
        state->vs_3v  = 1; /* FIXME Can only apply 3.3V on Shannon. */
        state->vs_Xv  = 0;
        break;

    case 1:
        state->bvd1   = 1; 
        state->bvd2   = 1; 
        state->vs_3v  = 1; /* FIXME Can only apply 3.3V on Shannon. */
        state->vs_Xv  = 0;
        break;
    }
}

static int
shannon_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
                const socket_state_t *state)
{
    switch (state->Vcc) {
    case 0: /* power off */
        printk(KERN_WARNING "%s(): CS asked for 0V, still applying 3.3V..\n", __func__);
        break;
    case 50:
        printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V..\n", __func__);
    case 33:
        break;
    default:
        printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
               __func__, state->Vcc);
        return -1;
    }

    printk(KERN_WARNING "%s(): Warning, Can't perform reset\n", __func__);
    
    /* Silently ignore Vpp, output enable, speaker enable. */

    return 0;
}

static struct pcmcia_low_level shannon_pcmcia_ops = {
    .owner          = THIS_MODULE,
    .hw_init        = shannon_pcmcia_hw_init,
    .socket_state       = shannon_pcmcia_socket_state,
    .configure_socket   = shannon_pcmcia_configure_socket,
};

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

    if (machine_is_shannon())
        ret = sa11xx_drv_pcmcia_probe(dev, &shannon_pcmcia_ops, 0, 2);

    return ret;
}