amijoy.c
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/*
* 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/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/mutex.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;
if (!MACH_IS_AMIGA)
return -ENODEV;
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++) {
input_set_abs_params(amijoy_dev[i], ABS_X + j,
-1, 1, 0, 0);
}
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);