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/*

 * $Id: amijoy.c,v 1.13 2002/01/22 20:26:32 vojtech Exp $

 *

 *  Copyright (c) 1998-2001 Vojtech Pavlik

 */

/*

 * Driver for Amiga joysticks for Linux/m68k

 */

/*

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

 *

 * Should you need to contact me, the author, you can do so either by

 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:

 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic

 */

#include <linux/types.h>

#include <linux/errno.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/init.h>

#include <linux/input.h>

#include <linux/interrupt.h>

#include <linux/mutex.h>

#include <asm/system.h>

#include <asm/amigahw.h>

#include <asm/amigaints.h>

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");

MODULE_DESCRIPTION("Driver for Amiga joysticks");

MODULE_LICENSE("GPL");

static int amijoy[2] = { 0, 1 };

module_param_array_named(map, amijoy, uint, NULL, 0);

MODULE_PARM_DESC(map, "Map of attached joysticks in form of <a>,<b> (default is 0,1)");

static int amijoy_used;

static DEFINE_MUTEX(amijoy_mutex);

static struct input_dev *amijoy_dev[2];

static char *amijoy_phys[2] = { "amijoy/input0", "amijoy/input1" };

static irqreturn_t amijoy_interrupt(int irq, void *dummy)

{

        int i, data = 0, button = 0;

        for (i = 0; i < 2; i++)

                if (amijoy[i]) {

                        switch (i) {

                                case 0: data = ~amiga_custom.joy0dat; button = (~ciaa.pra >> 6) & 1; break;

                                case 1: data = ~amiga_custom.joy1dat; button = (~ciaa.pra >> 7) & 1; break;

                        }

                        input_report_key(amijoy_dev[i], BTN_TRIGGER, button);

                        input_report_abs(amijoy_dev[i], ABS_X, ((data >> 1) & 1) - ((data >> 9) & 1));

                        data = ~(data ^ (data << 1));

                        input_report_abs(amijoy_dev[i], ABS_Y, ((data >> 1) & 1) - ((data >> 9) & 1));

                        input_sync(amijoy_dev[i]);

                }

        return IRQ_HANDLED;

}

static int amijoy_open(struct input_dev *dev)

{

        int err;

        err = mutex_lock_interruptible(&amijoy_mutex);

        if (err)

                return err;

        if (!amijoy_used && request_irq(IRQ_AMIGA_VERTB, amijoy_interrupt, 0, "amijoy", amijoy_interrupt)) {

                printk(KERN_ERR "amijoy.c: Can't allocate irq %d\n", IRQ_AMIGA_VERTB);

                err = -EBUSY;

                goto out;

        }

        amijoy_used++;

out:

        mutex_unlock(&amijoy_mutex);

        return err;

}

static void amijoy_close(struct input_dev *dev)

{

        mutex_lock(&amijoy_mutex);

        if (!--amijoy_used)

                free_irq(IRQ_AMIGA_VERTB, amijoy_interrupt);

        mutex_unlock(&amijoy_mutex);

}

static int __init amijoy_init(void)

{

        int i, j;

        int err;

        for (i = 0; i < 2; i++) {

                if (!amijoy[i])

                        continue;

                amijoy_dev[i] = input_allocate_device();

                if (!amijoy_dev[i]) {

                        err = -ENOMEM;

                        goto fail;

                }

                if (!request_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2, "amijoy [Denise]")) {

                        input_free_device(amijoy_dev[i]);

                        err = -EBUSY;

                        goto fail;

                }

                amijoy_dev[i]->name = "Amiga joystick";

                amijoy_dev[i]->phys = amijoy_phys[i];

                amijoy_dev[i]->id.bustype = BUS_AMIGA;

                amijoy_dev[i]->id.vendor = 0x0001;

                amijoy_dev[i]->id.product = 0x0003;

                amijoy_dev[i]->id.version = 0x0100;

                amijoy_dev[i]->open = amijoy_open;

                amijoy_dev[i]->close = amijoy_close;

                amijoy_dev[i]->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);

                amijoy_dev[i]->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y);

                amijoy_dev[i]->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |

                        BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);

                for (j = 0; j < 2; j++) {

                        amijoy_dev[i]->absmin[ABS_X + j] = -1;

                        amijoy_dev[i]->absmax[ABS_X + j] = 1;

                }

                err = input_register_device(amijoy_dev[i]);

                if (err) {

                        input_free_device(amijoy_dev[i]);

                        goto fail;

                }

        }

        return 0;

 fail:  while (--i >= 0)

                if (amijoy[i]) {

                        input_unregister_device(amijoy_dev[i]);

                        release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);

                }

        return err;

}

static void __exit amijoy_exit(void)

{

        int i;

        for (i = 0; i < 2; i++)

                if (amijoy[i]) {

                        input_unregister_device(amijoy_dev[i]);

                        release_mem_region(CUSTOM_PHYSADDR + 10 + i * 2, 2);

                }

}

module_init(amijoy_init);

module_exit(amijoy_exit);