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/*

 * linux/drivers/pcmcia/pxa2xx_mainstone.c

 *

 * Mainstone PCMCIA specific routines.

 *

 * Created:     May 12, 2004

 * Author:      Nicolas Pitre

 * Copyright:   MontaVista Software Inc.

 *

 * 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 <pcmcia/ss.h>

#include <asm/hardware.h>

#include <asm/irq.h>

#include <asm/arch/pxa-regs.h>

#include <asm/arch/mainstone.h>

#include "soc_common.h"

static struct pcmcia_irqs irqs[] = {

        { 0, MAINSTONE_S0_CD_IRQ, "PCMCIA0 CD" },

        { 1, MAINSTONE_S1_CD_IRQ, "PCMCIA1 CD" },

        { 0, MAINSTONE_S0_STSCHG_IRQ, "PCMCIA0 STSCHG" },

        { 1, MAINSTONE_S1_STSCHG_IRQ, "PCMCIA1 STSCHG" },

};

static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)

{

        /*

         * Setup default state of GPIO outputs

         * before we enable them as outputs.

         */

        skt->irq = (skt->nr == 0) ? MAINSTONE_S0_IRQ : MAINSTONE_S1_IRQ;

        return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));

}

static void mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)

{

        soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));

}

static unsigned long mst_pcmcia_status[2];

static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,

                                    struct pcmcia_state *state)

{

        unsigned long status, flip;

        status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;

        flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;

        /*

         * Workaround for STSCHG which can't be deasserted:

         * We therefore disable/enable corresponding IRQs

         * as needed to avoid IRQ locks.

         */

        if (flip) {

                mst_pcmcia_status[skt->nr] = status;

                if (status & MST_PCMCIA_nSTSCHG_BVD1)

                        enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ

                                                   : MAINSTONE_S1_STSCHG_IRQ );

                else

                        disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ

                                                    : MAINSTONE_S1_STSCHG_IRQ );

        }

        state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;

        state->ready  = (status & MST_PCMCIA_nIRQ) ? 1 : 0;

        state->bvd1   = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;

        state->bvd2   = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;

        state->vs_3v  = (status & MST_PCMCIA_nVS1) ? 0 : 1;

        state->vs_Xv  = (status & MST_PCMCIA_nVS2) ? 0 : 1;

        state->wrprot = 0;  /* not available */

}

static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,

                                       const socket_state_t *state)

{

        unsigned long power = 0;

        int ret = 0;

        switch (state->Vcc) {

        case 0:  power |= MST_PCMCIA_PWR_VCC_0;  break;

        case 33: power |= MST_PCMCIA_PWR_VCC_33; break;

        case 50: power |= MST_PCMCIA_PWR_VCC_50; break;

        default:

                 printk(KERN_ERR "%s(): bad Vcc %u\n",

                                 __FUNCTION__, state->Vcc);

                 ret = -1;

        }

        switch (state->Vpp) {

        case 0:   power |= MST_PCMCIA_PWR_VPP_0;   break;

        case 120: power |= MST_PCMCIA_PWR_VPP_120; break;

        default:

                  if(state->Vpp == state->Vcc) {

                          power |= MST_PCMCIA_PWR_VPP_VCC;

                  } else {

                          printk(KERN_ERR "%s(): bad Vpp %u\n",

                                          __FUNCTION__, state->Vpp);

                          ret = -1;

                  }

        }

        if (state->flags & SS_RESET)

               power |= MST_PCMCIA_RESET;

        switch (skt->nr) {

        case 0:  MST_PCMCIA0 = power; break;

        case 1:  MST_PCMCIA1 = power; break;

        default: ret = -1;

        }

        return ret;

}

static void mst_pcmcia_socket_init(struct soc_pcmcia_socket *skt)

{

}

static void mst_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)

{

}

static struct pcmcia_low_level mst_pcmcia_ops = {

        .owner                  = THIS_MODULE,

        .hw_init                = mst_pcmcia_hw_init,

        .hw_shutdown            = mst_pcmcia_hw_shutdown,

        .socket_state           = mst_pcmcia_socket_state,

        .configure_socket       = mst_pcmcia_configure_socket,

        .socket_init            = mst_pcmcia_socket_init,

        .socket_suspend         = mst_pcmcia_socket_suspend,

        .nr                     = 2,

};

static struct platform_device *mst_pcmcia_device;

static int __init mst_pcmcia_init(void)

{

        int ret;

        mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);

        if (!mst_pcmcia_device)

                return -ENOMEM;

        mst_pcmcia_device->dev.platform_data = &mst_pcmcia_ops;

        ret = platform_device_add(mst_pcmcia_device);

        if (ret)

                platform_device_put(mst_pcmcia_device);

        return ret;

}

static void __exit mst_pcmcia_exit(void)

{

        platform_device_unregister(mst_pcmcia_device);

}

fs_initcall(mst_pcmcia_init);

module_exit(mst_pcmcia_exit);

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:pxa2xx-pcmcia");