sa1100_simpad.c

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/*
 * drivers/pcmcia/sa1100_simpad.c
 *
 * PCMCIA implementation routines for simpad
 *
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/init.h>

#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/irq.h>
#include <mach/simpad.h>
#include "sa1100_generic.h"
 
static int simpad_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{

    simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);

    skt->stat[SOC_STAT_CD].gpio = GPIO_CF_CD;
    skt->stat[SOC_STAT_CD].name = "CF_CD";
    skt->stat[SOC_STAT_RDY].gpio = GPIO_CF_IRQ;
    skt->stat[SOC_STAT_RDY].name = "CF_RDY";

    return 0;
}

static void simpad_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
    /* Disable CF bus: */
    /*simpad_set_cs3_bit(PCMCIA_BUFF_DIS);*/
    simpad_clear_cs3_bit(PCMCIA_RESET);
}

static void
simpad_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
               struct pcmcia_state *state)
{
    long cs3reg = simpad_get_cs3_ro();

    /* the detect signal is inverted - fix that up here */
    state->detect = !state->detect;

    state->bvd1 = 1; /* Might be cs3reg & PCMCIA_BVD1 */
    state->bvd2 = 1; /* Might be cs3reg & PCMCIA_BVD2 */

    if ((cs3reg & (PCMCIA_VS1|PCMCIA_VS2)) ==
            (PCMCIA_VS1|PCMCIA_VS2)) {
        state->vs_3v=0;
        state->vs_Xv=0;
    } else {
        state->vs_3v=1;
        state->vs_Xv=0;
    }
}

static int
simpad_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
                   const socket_state_t *state)
{
    unsigned long flags;

    local_irq_save(flags);

    /* Murphy: see table of MIC2562a-1 */
    switch (state->Vcc) {
    case 0:
        simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
        break;

    case 33:  
        simpad_clear_cs3_bit(VCC_3V_EN|EN1);
        simpad_set_cs3_bit(VCC_5V_EN|EN0);
        break;

    case 50:
        simpad_clear_cs3_bit(VCC_5V_EN|EN1);
        simpad_set_cs3_bit(VCC_3V_EN|EN0);
        break;

    default:
        printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
            __func__, state->Vcc);
        simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
        local_irq_restore(flags);
        return -1;
    }


    local_irq_restore(flags);

    return 0;
}

static void simpad_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
    simpad_set_cs3_bit(PCMCIA_RESET);
}

static struct pcmcia_low_level simpad_pcmcia_ops = { 
    .owner          = THIS_MODULE,
    .hw_init        = simpad_pcmcia_hw_init,
    .hw_shutdown        = simpad_pcmcia_hw_shutdown,
    .socket_state       = simpad_pcmcia_socket_state,
    .configure_socket   = simpad_pcmcia_configure_socket,
    .socket_suspend     = simpad_pcmcia_socket_suspend,
};

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

    if (machine_is_simpad())
        ret = sa11xx_drv_pcmcia_probe(dev, &simpad_pcmcia_ops, 1, 1);

    return ret;
}