2 * $Id: turbografx.c,v 1.14 2002/01/22 20:30:39 vojtech Exp $
4 * Copyright (c) 1998-2001 Vojtech Pavlik
6 * Based on the work of:
11 * TurboGraFX parallel port interface driver for Linux.
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 * Should you need to contact me, the author, you can do so either by
30 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
31 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
34 #include <linux/kernel.h>
35 #include <linux/parport.h>
36 #include <linux/input.h>
37 #include <linux/module.h>
38 #include <linux/moduleparam.h>
39 #include <linux/init.h>
40 #include <linux/mutex.h>
42 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
43 MODULE_DESCRIPTION("TurboGraFX parallel port interface driver");
44 MODULE_LICENSE("GPL");
46 #define TGFX_MAX_PORTS 3
47 #define TGFX_MAX_DEVICES 7
50 int args[TGFX_MAX_DEVICES + 1];
54 static struct tgfx_config tgfx[TGFX_MAX_PORTS] __initdata;
56 module_param_array_named(map, tgfx[0].args, int, &tgfx[0].nargs, 0);
57 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>");
58 module_param_array_named(map2, tgfx[1].args, int, &tgfx[1].nargs, 0);
59 MODULE_PARM_DESC(map2, "Describes second set of devices");
60 module_param_array_named(map3, tgfx[2].args, int, &tgfx[2].nargs, 0);
61 MODULE_PARM_DESC(map3, "Describes third set of devices");
63 __obsolete_setup("tgfx=");
64 __obsolete_setup("tgfx_2=");
65 __obsolete_setup("tgfx_3=");
67 #define TGFX_REFRESH_TIME HZ/100 /* 10 ms */
69 #define TGFX_TRIGGER 0x08
71 #define TGFX_DOWN 0x20
72 #define TGFX_LEFT 0x40
73 #define TGFX_RIGHT 0x80
75 #define TGFX_THUMB 0x02
76 #define TGFX_THUMB2 0x04
78 #define TGFX_TOP2 0x08
80 static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
84 struct timer_list timer;
85 struct input_dev *dev[TGFX_MAX_DEVICES];
86 char name[TGFX_MAX_DEVICES][64];
87 char phys[TGFX_MAX_DEVICES][32];
91 } *tgfx_base[TGFX_MAX_PORTS];
94 * tgfx_timer() reads and analyzes TurboGraFX joystick data.
97 static void tgfx_timer(unsigned long private)
99 struct tgfx *tgfx = (void *) private;
100 struct input_dev *dev;
103 for (i = 0; i < 7; i++)
104 if (tgfx->sticks & (1 << i)) {
108 parport_write_data(tgfx->pd->port, ~(1 << i));
109 data1 = parport_read_status(tgfx->pd->port) ^ 0x7f;
110 data2 = parport_read_control(tgfx->pd->port) ^ 0x04; /* CAVEAT parport */
112 input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT));
113 input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP ));
115 input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER));
116 input_report_key(dev, BTN_THUMB, (data2 & TGFX_THUMB ));
117 input_report_key(dev, BTN_THUMB2, (data2 & TGFX_THUMB2 ));
118 input_report_key(dev, BTN_TOP, (data2 & TGFX_TOP ));
119 input_report_key(dev, BTN_TOP2, (data2 & TGFX_TOP2 ));
124 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
127 static int tgfx_open(struct input_dev *dev)
129 struct tgfx *tgfx = dev->private;
132 err = mutex_lock_interruptible(&tgfx->sem);
137 parport_claim(tgfx->pd);
138 parport_write_control(tgfx->pd->port, 0x04);
139 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
142 mutex_unlock(&tgfx->sem);
146 static void tgfx_close(struct input_dev *dev)
148 struct tgfx *tgfx = dev->private;
150 mutex_lock(&tgfx->sem);
152 del_timer_sync(&tgfx->timer);
153 parport_write_control(tgfx->pd->port, 0x00);
154 parport_release(tgfx->pd);
156 mutex_unlock(&tgfx->sem);
162 * tgfx_probe() probes for tg gamepads.
165 static struct tgfx __init *tgfx_probe(int parport, int *n_buttons, int n_devs)
168 struct input_dev *input_dev;
170 struct pardevice *pd;
174 pp = parport_find_number(parport);
176 printk(KERN_ERR "turbografx.c: no such parport\n");
181 pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
183 printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n");
188 tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL);
190 printk(KERN_ERR "turbografx.c: Not enough memory\n");
192 goto err_unreg_pardev;
195 mutex_init(&tgfx->sem);
197 init_timer(&tgfx->timer);
198 tgfx->timer.data = (long) tgfx;
199 tgfx->timer.function = tgfx_timer;
201 for (i = 0; i < n_devs; i++) {
202 if (n_buttons[i] < 1)
205 if (n_buttons[i] > 6) {
206 printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]);
211 tgfx->dev[i] = input_dev = input_allocate_device();
213 printk(KERN_ERR "turbografx.c: Not enough memory for input device\n");
218 tgfx->sticks |= (1 << i);
219 snprintf(tgfx->name[i], sizeof(tgfx->name[i]),
220 "TurboGraFX %d-button Multisystem joystick", n_buttons[i]);
221 snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]),
222 "%s/input%d", tgfx->pd->port->name, i);
224 input_dev->name = tgfx->name[i];
225 input_dev->phys = tgfx->phys[i];
226 input_dev->id.bustype = BUS_PARPORT;
227 input_dev->id.vendor = 0x0003;
228 input_dev->id.product = n_buttons[i];
229 input_dev->id.version = 0x0100;
231 input_dev->private = tgfx;
232 input_dev->open = tgfx_open;
233 input_dev->close = tgfx_close;
235 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
236 input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
237 input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
239 for (j = 0; j < n_buttons[i]; j++)
240 set_bit(tgfx_buttons[j], input_dev->keybit);
242 err = input_register_device(tgfx->dev[i]);
248 printk(KERN_ERR "turbografx.c: No valid devices specified\n");
256 input_free_device(tgfx->dev[i]);
260 input_unregister_device(tgfx->dev[i]);
264 parport_unregister_device(pd);
266 parport_put_port(pp);
271 static void tgfx_remove(struct tgfx *tgfx)
275 for (i = 0; i < TGFX_MAX_DEVICES; i++)
277 input_unregister_device(tgfx->dev[i]);
278 parport_unregister_device(tgfx->pd);
282 static int __init tgfx_init(void)
288 for (i = 0; i < TGFX_MAX_PORTS; i++) {
289 if (tgfx[i].nargs == 0 || tgfx[i].args[0] < 0)
292 if (tgfx[i].nargs < 2) {
293 printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n");
298 tgfx_base[i] = tgfx_probe(tgfx[i].args[0], tgfx[i].args + 1, tgfx[i].nargs - 1);
299 if (IS_ERR(tgfx_base[i])) {
300 err = PTR_ERR(tgfx_base[i]);
310 tgfx_remove(tgfx_base[i]);
314 return have_dev ? 0 : -ENODEV;
317 static void __exit tgfx_exit(void)
321 for (i = 0; i < TGFX_MAX_PORTS; i++)
323 tgfx_remove(tgfx_base[i]);
326 module_init(tgfx_init);
327 module_exit(tgfx_exit);