Viewing file:  turbografx.c (6.62 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* $Id: turbografx.c,v 1.8 2000/05/29 20:39:38 vojtech Exp $
*
* Copyright (c) 1998-2000 Vojtech Pavlik
*
* Based on the work of:
* Steffen Schwenke
*
* Sponsored by SuSE
*/
/*
* TurboGraFX parallel port interface driver for Linux.
*/
/*
* 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@suse.cz>, or by paper mail:
* Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
*/
#include <linux/kernel.h>
#include <linux/parport.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/init.h>
MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
MODULE_LICENSE("GPL");
MODULE_PARM(tgfx, "2-8i");
MODULE_PARM(tgfx_2, "2-8i");
MODULE_PARM(tgfx_3, "2-8i");
#define TGFX_REFRESH_TIME HZ/100 /* 10 ms */
#define TGFX_TRIGGER 0x08
#define TGFX_UP 0x10
#define TGFX_DOWN 0x20
#define TGFX_LEFT 0x40
#define TGFX_RIGHT 0x80
#define TGFX_THUMB 0x02
#define TGFX_THUMB2 0x04
#define TGFX_TOP 0x01
#define TGFX_TOP2 0x08
static int tgfx[] __initdata = { -1, 0, 0, 0, 0, 0, 0, 0 };
static int tgfx_2[] __initdata = { -1, 0, 0, 0, 0, 0, 0, 0 };
static int tgfx_3[] __initdata = { -1, 0, 0, 0, 0, 0, 0, 0 };
static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
static char *tgfx_name = "TurboGraFX Multisystem joystick";
struct tgfx {
struct pardevice *pd;
struct timer_list timer;
struct input_dev dev[7];
int sticks;
int used;
} *tgfx_base[3];
/*
* tgfx_timer() reads and analyzes TurboGraFX joystick data.
*/
static void tgfx_timer(unsigned long private)
{
struct tgfx *tgfx = (void *) private;
struct input_dev *dev;
int data1, data2, i;
for (i = 0; i < 7; i++)
if (tgfx->sticks & (1 << i)) {
dev = tgfx->dev + i;
parport_write_data(tgfx->pd->port, ~(1 << i));
data1 = parport_read_status(tgfx->pd->port) ^ 0x7f;
data2 = parport_read_control(tgfx->pd->port) ^ 0x04; /* CAVEAT parport */
input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT));
input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP ));
input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER));
input_report_key(dev, BTN_THUMB, (data2 & TGFX_THUMB ));
input_report_key(dev, BTN_THUMB2, (data2 & TGFX_THUMB2 ));
input_report_key(dev, BTN_TOP, (data2 & TGFX_TOP ));
input_report_key(dev, BTN_TOP2, (data2 & TGFX_TOP2 ));
}
mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
}
static int tgfx_open(struct input_dev *dev)
{
struct tgfx *tgfx = dev->private;
if (!tgfx->used++) {
parport_claim(tgfx->pd);
parport_write_control(tgfx->pd->port, 0x04);
mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
}
return 0;
}
static void tgfx_close(struct input_dev *dev)
{
struct tgfx *tgfx = dev->private;
if (!--tgfx->used) {
del_timer(&tgfx->timer);
parport_write_control(tgfx->pd->port, 0x00);
parport_release(tgfx->pd);
}
}
/*
* tgfx_probe() probes for tg gamepads.
*/
static struct tgfx __init *tgfx_probe(int *config)
{
struct tgfx *tgfx;
struct parport *pp;
int i, j;
if (config[0] < 0)
return NULL;
for (pp = parport_enumerate(); pp && (config[0] > 0); pp = pp->next)
config[0]--;
if (!pp) {
printk(KERN_ERR "turbografx.c: no such parport\n");
return NULL;
}
if (!(tgfx = kmalloc(sizeof(struct tgfx), GFP_KERNEL)))
return NULL;
memset(tgfx, 0, sizeof(struct tgfx));
tgfx->pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
if (!tgfx->pd) {
printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n");
kfree(tgfx);
return NULL;
}
init_timer(&tgfx->timer);
tgfx->timer.data = (long) tgfx;
tgfx->timer.function = tgfx_timer;
tgfx->sticks = 0;
for (i = 0; i < 7; i++)
if (config[i+1] > 0 && config[i+1] < 6) {
tgfx->sticks |= (1 << i);
tgfx->dev[i].private = tgfx;
tgfx->dev[i].open = tgfx_open;
tgfx->dev[i].close = tgfx_close;
tgfx->dev[i].name = tgfx_name;
tgfx->dev[i].idbus = BUS_PARPORT;
tgfx->dev[i].idvendor = 0x0003;
tgfx->dev[i].idproduct = config[i+1];
tgfx->dev[i].idversion = 0x0100;
tgfx->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
tgfx->dev[i].absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
for (j = 0; j < config[i+1]; j++)
set_bit(tgfx_buttons[j], tgfx->dev[i].keybit);
tgfx->dev[i].absmin[ABS_X] = -1; tgfx->dev[i].absmax[ABS_X] = 1;
tgfx->dev[i].absmin[ABS_Y] = -1; tgfx->dev[i].absmax[ABS_Y] = 1;
input_register_device(tgfx->dev + i);
printk(KERN_INFO "input%d: %d-button Multisystem joystick on %s\n",
tgfx->dev[i].number, config[i+1], tgfx->pd->port->name);
}
if (!tgfx->sticks) {
parport_unregister_device(tgfx->pd);
kfree(tgfx);
return NULL;
}
return tgfx;
}
#ifndef MODULE
int __init tgfx_setup(char *str)
{
int i, ints[9];
get_options(str, ARRAY_SIZE(ints), ints);
for (i = 0; i <= ints[0] && i < 8; i++) tgfx[i] = ints[i + 1];
return 1;
}
int __init tgfx_setup_2(char *str)
{
int i, ints[9];
get_options(str, ARRAY_SIZE(ints), ints);
for (i = 0; i <= ints[0] && i < 8; i++) tgfx_2[i] = ints[i + 1];
return 1;
}
int __init tgfx_setup_3(char *str)
{
int i, ints[9];
get_options(str, ARRAY_SIZE(ints), ints);
for (i = 0; i <= ints[0] && i < 8; i++) tgfx_3[i] = ints[i + 1];
return 1;
}
__setup("tgfx=", tgfx_setup);
__setup("tgfx_2=", tgfx_setup_2);
__setup("tgfx_3=", tgfx_setup_3);
#endif
int __init tgfx_init(void)
{
tgfx_base[0] = tgfx_probe(tgfx);
tgfx_base[1] = tgfx_probe(tgfx_2);
tgfx_base[2] = tgfx_probe(tgfx_3);
if (tgfx_base[0] || tgfx_base[1] || tgfx_base[2])
return 0;
return -ENODEV;
}
void __exit tgfx_exit(void)
{
int i, j;
for (i = 0; i < 3; i++)
if (tgfx_base[i]) {
for (j = 0; j < 7; j++)
if (tgfx_base[i]->sticks & (1 << j))
input_unregister_device(tgfx_base[i]->dev + j);
parport_unregister_device(tgfx_base[i]->pd);
}
}
module_init(tgfx_init);
module_exit(tgfx_exit);
|