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/init.h>
39 #include <linux/mutex.h>
41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
42 MODULE_DESCRIPTION("TurboGraFX parallel port interface driver");
43 MODULE_LICENSE("GPL");
45 #define TGFX_MAX_PORTS 3
46 #define TGFX_MAX_DEVICES 7
49 int args[TGFX_MAX_DEVICES + 1];
53 static struct tgfx_config tgfx_cfg[TGFX_MAX_PORTS] __initdata;
55 module_param_array_named(map, tgfx_cfg[0].args, int, &tgfx_cfg[0].nargs, 0);
56 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>");
57 module_param_array_named(map2, tgfx_cfg[1].args, int, &tgfx_cfg[1].nargs, 0);
58 MODULE_PARM_DESC(map2, "Describes second set of devices");
59 module_param_array_named(map3, tgfx_cfg[2].args, int, &tgfx_cfg[2].nargs, 0);
60 MODULE_PARM_DESC(map3, "Describes third set of devices");
62 #define TGFX_REFRESH_TIME HZ/100 /* 10 ms */
64 #define TGFX_TRIGGER 0x08
66 #define TGFX_DOWN 0x20
67 #define TGFX_LEFT 0x40
68 #define TGFX_RIGHT 0x80
70 #define TGFX_THUMB 0x02
71 #define TGFX_THUMB2 0x04
73 #define TGFX_TOP2 0x08
75 static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
79 struct timer_list timer;
80 struct input_dev *dev[TGFX_MAX_DEVICES];
81 char name[TGFX_MAX_DEVICES][64];
82 char phys[TGFX_MAX_DEVICES][32];
86 } *tgfx_base[TGFX_MAX_PORTS];
89 * tgfx_timer() reads and analyzes TurboGraFX joystick data.
92 static void tgfx_timer(unsigned long private)
94 struct tgfx *tgfx = (void *) private;
95 struct input_dev *dev;
98 for (i = 0; i < 7; i++)
99 if (tgfx->sticks & (1 << i)) {
103 parport_write_data(tgfx->pd->port, ~(1 << i));
104 data1 = parport_read_status(tgfx->pd->port) ^ 0x7f;
105 data2 = parport_read_control(tgfx->pd->port) ^ 0x04; /* CAVEAT parport */
107 input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT));
108 input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP ));
110 input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER));
111 input_report_key(dev, BTN_THUMB, (data2 & TGFX_THUMB ));
112 input_report_key(dev, BTN_THUMB2, (data2 & TGFX_THUMB2 ));
113 input_report_key(dev, BTN_TOP, (data2 & TGFX_TOP ));
114 input_report_key(dev, BTN_TOP2, (data2 & TGFX_TOP2 ));
119 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
122 static int tgfx_open(struct input_dev *dev)
124 struct tgfx *tgfx = input_get_drvdata(dev);
127 err = mutex_lock_interruptible(&tgfx->sem);
132 parport_claim(tgfx->pd);
133 parport_write_control(tgfx->pd->port, 0x04);
134 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
137 mutex_unlock(&tgfx->sem);
141 static void tgfx_close(struct input_dev *dev)
143 struct tgfx *tgfx = input_get_drvdata(dev);
145 mutex_lock(&tgfx->sem);
147 del_timer_sync(&tgfx->timer);
148 parport_write_control(tgfx->pd->port, 0x00);
149 parport_release(tgfx->pd);
151 mutex_unlock(&tgfx->sem);
157 * tgfx_probe() probes for tg gamepads.
160 static struct tgfx __init *tgfx_probe(int parport, int *n_buttons, int n_devs)
163 struct input_dev *input_dev;
165 struct pardevice *pd;
169 pp = parport_find_number(parport);
171 printk(KERN_ERR "turbografx.c: no such parport\n");
176 pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
178 printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n");
183 tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL);
185 printk(KERN_ERR "turbografx.c: Not enough memory\n");
187 goto err_unreg_pardev;
190 mutex_init(&tgfx->sem);
192 init_timer(&tgfx->timer);
193 tgfx->timer.data = (long) tgfx;
194 tgfx->timer.function = tgfx_timer;
196 for (i = 0; i < n_devs; i++) {
197 if (n_buttons[i] < 1)
200 if (n_buttons[i] > 6) {
201 printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]);
206 tgfx->dev[i] = input_dev = input_allocate_device();
208 printk(KERN_ERR "turbografx.c: Not enough memory for input device\n");
213 tgfx->sticks |= (1 << i);
214 snprintf(tgfx->name[i], sizeof(tgfx->name[i]),
215 "TurboGraFX %d-button Multisystem joystick", n_buttons[i]);
216 snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]),
217 "%s/input%d", tgfx->pd->port->name, i);
219 input_dev->name = tgfx->name[i];
220 input_dev->phys = tgfx->phys[i];
221 input_dev->id.bustype = BUS_PARPORT;
222 input_dev->id.vendor = 0x0003;
223 input_dev->id.product = n_buttons[i];
224 input_dev->id.version = 0x0100;
226 input_set_drvdata(input_dev, tgfx);
228 input_dev->open = tgfx_open;
229 input_dev->close = tgfx_close;
231 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
232 input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
233 input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
235 for (j = 0; j < n_buttons[i]; j++)
236 set_bit(tgfx_buttons[j], input_dev->keybit);
238 err = input_register_device(tgfx->dev[i]);
244 printk(KERN_ERR "turbografx.c: No valid devices specified\n");
252 input_free_device(tgfx->dev[i]);
256 input_unregister_device(tgfx->dev[i]);
260 parport_unregister_device(pd);
262 parport_put_port(pp);
267 static void tgfx_remove(struct tgfx *tgfx)
271 for (i = 0; i < TGFX_MAX_DEVICES; i++)
273 input_unregister_device(tgfx->dev[i]);
274 parport_unregister_device(tgfx->pd);
278 static int __init tgfx_init(void)
284 for (i = 0; i < TGFX_MAX_PORTS; i++) {
285 if (tgfx_cfg[i].nargs == 0 || tgfx_cfg[i].args[0] < 0)
288 if (tgfx_cfg[i].nargs < 2) {
289 printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n");
294 tgfx_base[i] = tgfx_probe(tgfx_cfg[i].args[0],
295 tgfx_cfg[i].args + 1,
296 tgfx_cfg[i].nargs - 1);
297 if (IS_ERR(tgfx_base[i])) {
298 err = PTR_ERR(tgfx_base[i]);
308 tgfx_remove(tgfx_base[i]);
312 return have_dev ? 0 : -ENODEV;
315 static void __exit tgfx_exit(void)
319 for (i = 0; i < TGFX_MAX_PORTS; i++)
321 tgfx_remove(tgfx_base[i]);
324 module_init(tgfx_init);
325 module_exit(tgfx_exit);