pxa2xx_trizeps4.c

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/*
 * linux/drivers/pcmcia/pxa2xx_trizeps4.c
 *
 * TRIZEPS PCMCIA specific routines.
 *
 * Author:  Jürgen Schindele
 * Created: 20 02, 2006
 * Copyright:   Jürgen Schindele
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>

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

#include <mach/pxa2xx-regs.h>
#include <mach/trizeps4.h>

#include "soc_common.h"

extern void board_pcmcia_power(int power);

static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
    /* we dont have voltage/card/ready detection
     * so we dont need interrupts for it
     */
    switch (skt->nr) {
    case 0:
        skt->stat[SOC_STAT_CD].gpio = GPIO_PCD;
        skt->stat[SOC_STAT_CD].name = "cs0_cd";
        skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY;
        skt->stat[SOC_STAT_RDY].name = "cs0_rdy";
        break;
    default:
        break;
    }
    /* release the reset of this card */
    pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);

    return 0;
}

static unsigned long trizeps_pcmcia_status[2];

static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
                struct pcmcia_state *state)
{
    unsigned short status = 0, change;
    status = CFSR_readw();
    change = (status ^ trizeps_pcmcia_status[skt->nr]) &
                ConXS_CFSR_BVD_MASK;
    if (change) {
        trizeps_pcmcia_status[skt->nr] = status;
        if (status & ConXS_CFSR_BVD1) {
            /* enable_irq empty */
        } else {
            /* disable_irq empty */
        }
    }

    switch (skt->nr) {
    case 0:
        /* just fill in fix states */
        state->bvd1   = (status & ConXS_CFSR_BVD1) ? 1 : 0;
        state->bvd2   = (status & ConXS_CFSR_BVD2) ? 1 : 0;
        state->vs_3v  = (status & ConXS_CFSR_VS1) ? 0 : 1;
        state->vs_Xv  = (status & ConXS_CFSR_VS2) ? 0 : 1;
        break;

#ifndef CONFIG_MACH_TRIZEPS_CONXS
    /* on ConXS we only have one slot. Second is inactive */
    case 1:
        state->detect = 0;
        state->ready  = 0;
        state->bvd1   = 0;
        state->bvd2   = 0;
        state->vs_3v  = 0;
        state->vs_Xv  = 0;
        break;

#endif
    }
}

static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
                const socket_state_t *state)
{
    int ret = 0;
    unsigned short power = 0;

    /* we do nothing here just check a bit */
    switch (state->Vcc) {
    case 0:  power &= 0xfc; break;
    case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
    case 50:
        pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
        break;
    default:
        pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
        ret = -1;
    }

    switch (state->Vpp) {
    case 0:  power &= 0xf3; break;
    case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
    case 120:
        pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
        break;
    default:
        if (state->Vpp != state->Vcc) {
            pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
            ret = -1;
        }
    }

    switch (skt->nr) {
    case 0:          /* we only have 3.3V */
        board_pcmcia_power(power);
        break;

#ifndef CONFIG_MACH_TRIZEPS_CONXS
    /* on ConXS we only have one slot. Second is inactive */
    case 1:
#endif
    default:
        break;
    }

    return ret;
}

static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
    /* default is on */
    board_pcmcia_power(0x9);
}

static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
    board_pcmcia_power(0x0);
}

static struct pcmcia_low_level trizeps_pcmcia_ops = {
    .owner          = THIS_MODULE,
    .hw_init        = trizeps_pcmcia_hw_init,
    .socket_state       = trizeps_pcmcia_socket_state,
    .configure_socket   = trizeps_pcmcia_configure_socket,
    .socket_init        = trizeps_pcmcia_socket_init,
    .socket_suspend     = trizeps_pcmcia_socket_suspend,
#ifdef CONFIG_MACH_TRIZEPS_CONXS
    .nr         = 1,
#else
    .nr         = 2,
#endif
    .first          = 0,
};

static struct platform_device *trizeps_pcmcia_device;

static int __init trizeps_pcmcia_init(void)
{
    int ret;

    if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
        return -ENODEV;

    trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
    if (!trizeps_pcmcia_device)
        return -ENOMEM;

    ret = platform_device_add_data(trizeps_pcmcia_device,
            &trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));

    if (ret == 0)
        ret = platform_device_add(trizeps_pcmcia_device);

    if (ret)
        platform_device_put(trizeps_pcmcia_device);

    return ret;
}

static void __exit trizeps_pcmcia_exit(void)
{
    platform_device_unregister(trizeps_pcmcia_device);
}

fs_initcall(trizeps_pcmcia_init);
module_exit(trizeps_pcmcia_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Juergen Schindele");
MODULE_ALIAS("platform:pxa2xx-pcmcia");