pxa2xx_sharpsl.c

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/*
 * Sharp SL-C7xx Series PCMCIA routines
 *
 * Copyright (c) 2004-2005 Richard Purdie
 *
 * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c
 *
 * 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/errno.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>

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

#include "soc_common.h"

#define NO_KEEP_VS 0x0001
#define SCOOP_DEV platform_scoop_config->devs

static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt)
{
    struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr];

    reset_scoop(scoopdev->dev);

    /* Shared power controls need to be handled carefully */
    if (platform_scoop_config->power_ctrl)
        platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr);
    else
        write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000);

    scoopdev->keep_vs = NO_KEEP_VS;
    scoopdev->keep_rd = 0;
}

static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
    if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
        skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq;
        skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str;
    }

    skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq;

    return 0;
}

static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
                    struct pcmcia_state *state)
{
    unsigned short cpr, csr;
    struct device *scoop = SCOOP_DEV[skt->nr].dev;

    cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR);

    write_scoop_reg(scoop, SCOOP_IRM, 0x00FF);
    write_scoop_reg(scoop, SCOOP_ISR, 0x0000);
    write_scoop_reg(scoop, SCOOP_IRM, 0x0000);
    csr = read_scoop_reg(scoop, SCOOP_CSR);
    if (csr & 0x0004) {
        /* card eject */
        write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
        SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
    }
    else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) {
        /* keep vs1,vs2 */
        write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
        csr |= SCOOP_DEV[skt->nr].keep_vs;
    }
    else if (cpr & 0x0003) {
        /* power on */
        write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
        SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0);
    }
    else {
        /* card detect */
            if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) {
                    write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
            } else {
                write_scoop_reg(scoop, SCOOP_CDR, 0x0002);
            }
    }

    state->detect = (csr & 0x0004) ? 0 : 1;
    state->ready  = (csr & 0x0002) ? 1 : 0;
    state->bvd1   = (csr & 0x0010) ? 1 : 0;
    state->bvd2   = (csr & 0x0020) ? 1 : 0;
    state->wrprot = (csr & 0x0008) ? 1 : 0;
    state->vs_3v  = (csr & 0x0040) ? 0 : 1;
    state->vs_Xv  = (csr & 0x0080) ? 0 : 1;

    if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
        printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
    }
}


static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
                       const socket_state_t *state)
{
    unsigned long flags;
    struct device *scoop = SCOOP_DEV[skt->nr].dev;

    unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;

    switch (state->Vcc) {
    case    0:      break;
    case    33:     break;
    case    50:     break;
    default:
         printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
         return -1;
    }

    if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
        printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
        return -1;
    }

    local_irq_save(flags);

    nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010;
    ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083;
    nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080;
    nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E;

    if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) {
            ncpr |= (state->Vcc == 33) ? 0x0002 :
                (state->Vcc == 50) ? 0x0002 : 0;
    } else {
            ncpr |= (state->Vcc == 33) ? 0x0001 :
                (state->Vcc == 50) ? 0x0002 : 0;
    }
    nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0;
    ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0;
    nccr |= (state->flags&SS_RESET)? 0x0080: 0;
    nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)|
            ((skt->status&SS_READY)  ? 0x0002 : 0)|
            ((skt->status&SS_BATDEAD)? 0x0010 : 0)|
            ((skt->status&SS_BATWARN)? 0x0020 : 0)|
            ((skt->status&SS_STSCHG) ? 0x0010 : 0)|
            ((skt->status&SS_WRPROT) ? 0x0008 : 0);

    if (!(ncpr & 0x0003)) {
        SCOOP_DEV[skt->nr].keep_rd = 0;
    } else if (!SCOOP_DEV[skt->nr].keep_rd) {
        if (nccr & 0x0080)
            SCOOP_DEV[skt->nr].keep_rd = 1;
        else
            nccr |= 0x0080;
    }

    if (mcr != nmcr)
        write_scoop_reg(scoop, SCOOP_MCR, nmcr);
    if (cpr != ncpr) {
        if (platform_scoop_config->power_ctrl)
            platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr);
        else
                write_scoop_reg(scoop, SCOOP_CPR, ncpr);
    }
    if (ccr != nccr)
        write_scoop_reg(scoop, SCOOP_CCR, nccr);
    if (imr != nimr)
        write_scoop_reg(scoop, SCOOP_IMR, nimr);

    local_irq_restore(flags);

    return 0;
}

static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
    sharpsl_pcmcia_init_reset(skt);

    /* Enable interrupt */
    write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0);
    write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101);
    SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
}

static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
    sharpsl_pcmcia_init_reset(skt);
}

static struct pcmcia_low_level sharpsl_pcmcia_ops = {
    .owner                  = THIS_MODULE,
    .hw_init                = sharpsl_pcmcia_hw_init,
    .socket_state           = sharpsl_pcmcia_socket_state,
    .configure_socket       = sharpsl_pcmcia_configure_socket,
    .socket_init            = sharpsl_pcmcia_socket_init,
    .socket_suspend         = sharpsl_pcmcia_socket_suspend,
    .first                  = 0,
    .nr                     = 0,
};

#ifdef CONFIG_SA1100_COLLIE
#include "sa11xx_base.h"

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

       if (machine_is_collie())
               ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1);

       return ret;
}

#else

static struct platform_device *sharpsl_pcmcia_device;

static int __init sharpsl_pcmcia_init(void)
{
    int ret;

    if (!platform_scoop_config)
        return -ENODEV;

    sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs;
    sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);

    if (!sharpsl_pcmcia_device)
        return -ENOMEM;

    ret = platform_device_add_data(sharpsl_pcmcia_device,
            &sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops));
    if (ret == 0) {
        sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev;
        ret = platform_device_add(sharpsl_pcmcia_device);
    }

    if (ret)
        platform_device_put(sharpsl_pcmcia_device);

    return ret;
}

static void __exit sharpsl_pcmcia_exit(void)
{
    platform_device_unregister(sharpsl_pcmcia_device);
}

fs_initcall(sharpsl_pcmcia_init);
module_exit(sharpsl_pcmcia_exit);
#endif

MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pxa2xx-pcmcia");