1 /*
2 * Copyright (c) 1998-2001 Vojtech Pavlik
3 *
4 * Based on the work of:
5 * Steffen Schwenke
6 */
7
8 /*
9 * TurboGraFX parallel port interface driver for Linux.
10 */
11
12 /*
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 * Should you need to contact me, the author, you can do so either by
28 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
29 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
30 */
31
32 #include <linux/kernel.h>
33 #include <linux/parport.h>
34 #include <linux/input.h>
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/mutex.h>
38
39 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
40 MODULE_DESCRIPTION("TurboGraFX parallel port interface driver");
41 MODULE_LICENSE("GPL");
42
43 #define TGFX_MAX_PORTS 3
44 #define TGFX_MAX_DEVICES 7
45
46 struct tgfx_config {
47 int args[TGFX_MAX_DEVICES + 1];
48 unsigned int nargs;
49 };
50
51 static struct tgfx_config tgfx_cfg[TGFX_MAX_PORTS] __initdata;
52
53 module_param_array_named(map, tgfx_cfg[0].args, int, &tgfx_cfg[0].nargs, 0);
54 MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<js1>,<js2>,..<js7>");
55 module_param_array_named(map2, tgfx_cfg[1].args, int, &tgfx_cfg[1].nargs, 0);
56 MODULE_PARM_DESC(map2, "Describes second set of devices");
57 module_param_array_named(map3, tgfx_cfg[2].args, int, &tgfx_cfg[2].nargs, 0);
58 MODULE_PARM_DESC(map3, "Describes third set of devices");
59
60 #define TGFX_REFRESH_TIME HZ/100 /* 10 ms */
61
62 #define TGFX_TRIGGER 0x08
63 #define TGFX_UP 0x10
64 #define TGFX_DOWN 0x20
65 #define TGFX_LEFT 0x40
66 #define TGFX_RIGHT 0x80
67
68 #define TGFX_THUMB 0x02
69 #define TGFX_THUMB2 0x04
70 #define TGFX_TOP 0x01
71 #define TGFX_TOP2 0x08
72
73 static int tgfx_buttons[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2 };
74
75 static struct tgfx {
76 struct pardevice *pd;
77 struct timer_list timer;
78 struct input_dev *dev[TGFX_MAX_DEVICES];
79 char name[TGFX_MAX_DEVICES][64];
80 char phys[TGFX_MAX_DEVICES][32];
81 int sticks;
82 int used;
83 struct mutex sem;
84 } *tgfx_base[TGFX_MAX_PORTS];
85
86 /*
87 * tgfx_timer() reads and analyzes TurboGraFX joystick data.
88 */
89
90 static void tgfx_timer(unsigned long private)
91 {
92 struct tgfx *tgfx = (void *) private;
93 struct input_dev *dev;
94 int data1, data2, i;
95
96 for (i = 0; i < 7; i++)
97 if (tgfx->sticks & (1 << i)) {
98
99 dev = tgfx->dev[i];
100
101 parport_write_data(tgfx->pd->port, ~(1 << i));
102 data1 = parport_read_status(tgfx->pd->port) ^ 0x7f;
103 data2 = parport_read_control(tgfx->pd->port) ^ 0x04; /* CAVEAT parport */
104
105 input_report_abs(dev, ABS_X, !!(data1 & TGFX_RIGHT) - !!(data1 & TGFX_LEFT));
106 input_report_abs(dev, ABS_Y, !!(data1 & TGFX_DOWN ) - !!(data1 & TGFX_UP ));
107
108 input_report_key(dev, BTN_TRIGGER, (data1 & TGFX_TRIGGER));
109 input_report_key(dev, BTN_THUMB, (data2 & TGFX_THUMB ));
110 input_report_key(dev, BTN_THUMB2, (data2 & TGFX_THUMB2 ));
111 input_report_key(dev, BTN_TOP, (data2 & TGFX_TOP ));
112 input_report_key(dev, BTN_TOP2, (data2 & TGFX_TOP2 ));
113
114 input_sync(dev);
115 }
116
117 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
118 }
119
120 static int tgfx_open(struct input_dev *dev)
121 {
122 struct tgfx *tgfx = input_get_drvdata(dev);
123 int err;
124
125 err = mutex_lock_interruptible(&tgfx->sem);
126 if (err)
127 return err;
128
129 if (!tgfx->used++) {
130 parport_claim(tgfx->pd);
131 parport_write_control(tgfx->pd->port, 0x04);
132 mod_timer(&tgfx->timer, jiffies + TGFX_REFRESH_TIME);
133 }
134
135 mutex_unlock(&tgfx->sem);
136 return 0;
137 }
138
139 static void tgfx_close(struct input_dev *dev)
140 {
141 struct tgfx *tgfx = input_get_drvdata(dev);
142
143 mutex_lock(&tgfx->sem);
144 if (!--tgfx->used) {
145 del_timer_sync(&tgfx->timer);
146 parport_write_control(tgfx->pd->port, 0x00);
147 parport_release(tgfx->pd);
148 }
149 mutex_unlock(&tgfx->sem);
150 }
151
152
153
154 /*
155 * tgfx_probe() probes for tg gamepads.
156 */
157
158 static struct tgfx __init *tgfx_probe(int parport, int *n_buttons, int n_devs)
159 {
160 struct tgfx *tgfx;
161 struct input_dev *input_dev;
162 struct parport *pp;
163 struct pardevice *pd;
164 int i, j;
165 int err;
166
167 pp = parport_find_number(parport);
168 if (!pp) {
169 printk(KERN_ERR "turbografx.c: no such parport\n");
170 err = -EINVAL;
171 goto err_out;
172 }
173
174 pd = parport_register_device(pp, "turbografx", NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
175 if (!pd) {
176 printk(KERN_ERR "turbografx.c: parport busy already - lp.o loaded?\n");
177 err = -EBUSY;
178 goto err_put_pp;
179 }
180
181 tgfx = kzalloc(sizeof(struct tgfx), GFP_KERNEL);
182 if (!tgfx) {
183 printk(KERN_ERR "turbografx.c: Not enough memory\n");
184 err = -ENOMEM;
185 goto err_unreg_pardev;
186 }
187
188 mutex_init(&tgfx->sem);
189 tgfx->pd = pd;
190 init_timer(&tgfx->timer);
191 tgfx->timer.data = (long) tgfx;
192 tgfx->timer.function = tgfx_timer;
193
194 for (i = 0; i < n_devs; i++) {
195 if (n_buttons[i] < 1)
196 continue;
197
198 if (n_buttons[i] > 6) {
199 printk(KERN_ERR "turbografx.c: Invalid number of buttons %d\n", n_buttons[i]);
200 err = -EINVAL;
201 goto err_unreg_devs;
202 }
203
204 tgfx->dev[i] = input_dev = input_allocate_device();
205 if (!input_dev) {
206 printk(KERN_ERR "turbografx.c: Not enough memory for input device\n");
207 err = -ENOMEM;
208 goto err_unreg_devs;
209 }
210
211 tgfx->sticks |= (1 << i);
212 snprintf(tgfx->name[i], sizeof(tgfx->name[i]),
213 "TurboGraFX %d-button Multisystem joystick", n_buttons[i]);
214 snprintf(tgfx->phys[i], sizeof(tgfx->phys[i]),
215 "%s/input%d", tgfx->pd->port->name, i);
216
217 input_dev->name = tgfx->name[i];
218 input_dev->phys = tgfx->phys[i];
219 input_dev->id.bustype = BUS_PARPORT;
220 input_dev->id.vendor = 0x0003;
221 input_dev->id.product = n_buttons[i];
222 input_dev->id.version = 0x0100;
223
224 input_set_drvdata(input_dev, tgfx);
225
226 input_dev->open = tgfx_open;
227 input_dev->close = tgfx_close;
228
229 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
230 input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
231 input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
232
233 for (j = 0; j < n_buttons[i]; j++)
234 set_bit(tgfx_buttons[j], input_dev->keybit);
235
236 err = input_register_device(tgfx->dev[i]);
237 if (err)
238 goto err_free_dev;
239 }
240
241 if (!tgfx->sticks) {
242 printk(KERN_ERR "turbografx.c: No valid devices specified\n");
243 err = -EINVAL;
244 goto err_free_tgfx;
245 }
246
247 return tgfx;
248
249 err_free_dev:
250 input_free_device(tgfx->dev[i]);
251 err_unreg_devs:
252 while (--i >= 0)
253 if (tgfx->dev[i])
254 input_unregister_device(tgfx->dev[i]);
255 err_free_tgfx:
256 kfree(tgfx);
257 err_unreg_pardev:
258 parport_unregister_device(pd);
259 err_put_pp:
260 parport_put_port(pp);
261 err_out:
262 return ERR_PTR(err);
263 }
264
265 static void tgfx_remove(struct tgfx *tgfx)
266 {
267 int i;
268
269 for (i = 0; i < TGFX_MAX_DEVICES; i++)
270 if (tgfx->dev[i])
271 input_unregister_device(tgfx->dev[i]);
272 parport_unregister_device(tgfx->pd);
273 kfree(tgfx);
274 }
275
276 static int __init tgfx_init(void)
277 {
278 int i;
279 int have_dev = 0;
280 int err = 0;
281
282 for (i = 0; i < TGFX_MAX_PORTS; i++) {
283 if (tgfx_cfg[i].nargs == 0 || tgfx_cfg[i].args[0] < 0)
284 continue;
285
286 if (tgfx_cfg[i].nargs < 2) {
287 printk(KERN_ERR "turbografx.c: at least one joystick must be specified\n");
288 err = -EINVAL;
289 break;
290 }
291
292 tgfx_base[i] = tgfx_probe(tgfx_cfg[i].args[0],
293 tgfx_cfg[i].args + 1,
294 tgfx_cfg[i].nargs - 1);
295 if (IS_ERR(tgfx_base[i])) {
296 err = PTR_ERR(tgfx_base[i]);
297 break;
298 }
299
300 have_dev = 1;
301 }
302
303 if (err) {
304 while (--i >= 0)
305 if (tgfx_base[i])
306 tgfx_remove(tgfx_base[i]);
307 return err;
308 }
309
310 return have_dev ? 0 : -ENODEV;
311 }
312
313 static void __exit tgfx_exit(void)
314 {
315 int i;
316
317 for (i = 0; i < TGFX_MAX_PORTS; i++)
318 if (tgfx_base[i])
319 tgfx_remove(tgfx_base[i]);
320 }
321
322 module_init(tgfx_init);
323 module_exit(tgfx_exit);
324
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