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1da177e4 LT |
1 | /* |
2 | * $Id: grip.c,v 1.21 2002/01/22 20:27:57 vojtech Exp $ | |
3 | * | |
4 | * Copyright (c) 1998-2001 Vojtech Pavlik | |
5 | */ | |
6 | ||
7 | /* | |
8 | * Gravis/Kensington GrIP protocol joystick and gamepad driver for Linux | |
9 | */ | |
10 | ||
11 | /* | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
25 | * | |
26 | * Should you need to contact me, the author, you can do so either by | |
27 | * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: | |
28 | * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic | |
29 | */ | |
30 | ||
31 | #include <linux/kernel.h> | |
32 | #include <linux/module.h> | |
33 | #include <linux/init.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/gameport.h> | |
36 | #include <linux/input.h> | |
37 | ||
38 | #define DRIVER_DESC "Gravis GrIP protocol joystick driver" | |
39 | ||
40 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
41 | MODULE_DESCRIPTION(DRIVER_DESC); | |
42 | MODULE_LICENSE("GPL"); | |
43 | ||
44 | #define GRIP_MODE_GPP 1 | |
45 | #define GRIP_MODE_BD 2 | |
46 | #define GRIP_MODE_XT 3 | |
47 | #define GRIP_MODE_DC 4 | |
48 | ||
49 | #define GRIP_LENGTH_GPP 24 | |
50 | #define GRIP_STROBE_GPP 200 /* 200 us */ | |
51 | #define GRIP_LENGTH_XT 4 | |
52 | #define GRIP_STROBE_XT 64 /* 64 us */ | |
53 | #define GRIP_MAX_CHUNKS_XT 10 | |
54 | #define GRIP_MAX_BITS_XT 30 | |
55 | ||
56 | struct grip { | |
57 | struct gameport *gameport; | |
58 | struct input_dev dev[2]; | |
59 | unsigned char mode[2]; | |
60 | int reads; | |
61 | int bads; | |
62 | char phys[2][32]; | |
63 | }; | |
64 | ||
65 | static int grip_btn_gpp[] = { BTN_START, BTN_SELECT, BTN_TR2, BTN_Y, 0, BTN_TL2, BTN_A, BTN_B, BTN_X, 0, BTN_TL, BTN_TR, -1 }; | |
66 | static int grip_btn_bd[] = { BTN_THUMB, BTN_THUMB2, BTN_TRIGGER, BTN_TOP, BTN_BASE, -1 }; | |
67 | static int grip_btn_xt[] = { BTN_TRIGGER, BTN_THUMB, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_SELECT, BTN_START, BTN_MODE, -1 }; | |
68 | static int grip_btn_dc[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, -1 }; | |
69 | ||
70 | static int grip_abs_gpp[] = { ABS_X, ABS_Y, -1 }; | |
71 | static int grip_abs_bd[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 }; | |
72 | static int grip_abs_xt[] = { ABS_X, ABS_Y, ABS_BRAKE, ABS_GAS, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, -1 }; | |
73 | static int grip_abs_dc[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 }; | |
74 | ||
75 | static char *grip_name[] = { NULL, "Gravis GamePad Pro", "Gravis Blackhawk Digital", | |
76 | "Gravis Xterminator Digital", "Gravis Xterminator DualControl" }; | |
77 | static int *grip_abs[] = { NULL, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc }; | |
78 | static int *grip_btn[] = { NULL, grip_btn_gpp, grip_btn_bd, grip_btn_xt, grip_btn_dc }; | |
79 | static char grip_anx[] = { 0, 0, 3, 5, 5 }; | |
80 | static char grip_cen[] = { 0, 0, 2, 2, 4 }; | |
81 | ||
82 | /* | |
83 | * grip_gpp_read_packet() reads a Gravis GamePad Pro packet. | |
84 | */ | |
85 | ||
86 | static int grip_gpp_read_packet(struct gameport *gameport, int shift, unsigned int *data) | |
87 | { | |
88 | unsigned long flags; | |
89 | unsigned char u, v; | |
90 | unsigned int t; | |
91 | int i; | |
92 | ||
93 | int strobe = gameport_time(gameport, GRIP_STROBE_GPP); | |
94 | ||
95 | data[0] = 0; | |
96 | t = strobe; | |
97 | i = 0; | |
98 | ||
99 | local_irq_save(flags); | |
100 | ||
101 | v = gameport_read(gameport) >> shift; | |
102 | ||
103 | do { | |
104 | t--; | |
105 | u = v; v = (gameport_read(gameport) >> shift) & 3; | |
106 | if (~v & u & 1) { | |
107 | data[0] |= (v >> 1) << i++; | |
108 | t = strobe; | |
109 | } | |
110 | } while (i < GRIP_LENGTH_GPP && t > 0); | |
111 | ||
112 | local_irq_restore(flags); | |
113 | ||
114 | if (i < GRIP_LENGTH_GPP) return -1; | |
115 | ||
116 | for (i = 0; i < GRIP_LENGTH_GPP && (data[0] & 0xfe4210) ^ 0x7c0000; i++) | |
117 | data[0] = data[0] >> 1 | (data[0] & 1) << (GRIP_LENGTH_GPP - 1); | |
118 | ||
119 | return -(i == GRIP_LENGTH_GPP); | |
120 | } | |
121 | ||
122 | /* | |
123 | * grip_xt_read_packet() reads a Gravis Xterminator packet. | |
124 | */ | |
125 | ||
126 | static int grip_xt_read_packet(struct gameport *gameport, int shift, unsigned int *data) | |
127 | { | |
128 | unsigned int i, j, buf, crc; | |
129 | unsigned char u, v, w; | |
130 | unsigned long flags; | |
131 | unsigned int t; | |
132 | char status; | |
133 | ||
134 | int strobe = gameport_time(gameport, GRIP_STROBE_XT); | |
135 | ||
136 | data[0] = data[1] = data[2] = data[3] = 0; | |
137 | status = buf = i = j = 0; | |
138 | t = strobe; | |
139 | ||
140 | local_irq_save(flags); | |
141 | ||
142 | v = w = (gameport_read(gameport) >> shift) & 3; | |
143 | ||
144 | do { | |
145 | t--; | |
146 | u = (gameport_read(gameport) >> shift) & 3; | |
147 | ||
148 | if (u ^ v) { | |
149 | ||
150 | if ((u ^ v) & 1) { | |
151 | buf = (buf << 1) | (u >> 1); | |
152 | t = strobe; | |
153 | i++; | |
154 | } else | |
155 | ||
156 | if ((((u ^ v) & (v ^ w)) >> 1) & ~(u | v | w) & 1) { | |
157 | if (i == 20) { | |
158 | crc = buf ^ (buf >> 7) ^ (buf >> 14); | |
159 | if (!((crc ^ (0x25cb9e70 >> ((crc >> 2) & 0x1c))) & 0xf)) { | |
160 | data[buf >> 18] = buf >> 4; | |
161 | status |= 1 << (buf >> 18); | |
162 | } | |
163 | j++; | |
164 | } | |
165 | t = strobe; | |
166 | buf = 0; | |
167 | i = 0; | |
168 | } | |
169 | w = v; | |
170 | v = u; | |
171 | } | |
172 | ||
173 | } while (status != 0xf && i < GRIP_MAX_BITS_XT && j < GRIP_MAX_CHUNKS_XT && t > 0); | |
174 | ||
175 | local_irq_restore(flags); | |
176 | ||
177 | return -(status != 0xf); | |
178 | } | |
179 | ||
180 | /* | |
181 | * grip_timer() repeatedly polls the joysticks and generates events. | |
182 | */ | |
183 | ||
184 | static void grip_poll(struct gameport *gameport) | |
185 | { | |
186 | struct grip *grip = gameport_get_drvdata(gameport); | |
187 | unsigned int data[GRIP_LENGTH_XT]; | |
188 | struct input_dev *dev; | |
189 | int i, j; | |
190 | ||
191 | for (i = 0; i < 2; i++) { | |
192 | ||
193 | dev = grip->dev + i; | |
194 | grip->reads++; | |
195 | ||
196 | switch (grip->mode[i]) { | |
197 | ||
198 | case GRIP_MODE_GPP: | |
199 | ||
200 | if (grip_gpp_read_packet(grip->gameport, (i << 1) + 4, data)) { | |
201 | grip->bads++; | |
202 | break; | |
203 | } | |
204 | ||
205 | input_report_abs(dev, ABS_X, ((*data >> 15) & 1) - ((*data >> 16) & 1)); | |
206 | input_report_abs(dev, ABS_Y, ((*data >> 13) & 1) - ((*data >> 12) & 1)); | |
207 | ||
208 | for (j = 0; j < 12; j++) | |
209 | if (grip_btn_gpp[j]) | |
210 | input_report_key(dev, grip_btn_gpp[j], (*data >> j) & 1); | |
211 | ||
212 | break; | |
213 | ||
214 | case GRIP_MODE_BD: | |
215 | ||
216 | if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) { | |
217 | grip->bads++; | |
218 | break; | |
219 | } | |
220 | ||
221 | input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f); | |
222 | input_report_abs(dev, ABS_Y, 63 - ((data[0] >> 8) & 0x3f)); | |
223 | input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f); | |
224 | ||
225 | input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1)); | |
226 | input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1)); | |
227 | ||
228 | for (j = 0; j < 5; j++) | |
229 | input_report_key(dev, grip_btn_bd[j], (data[3] >> (j + 4)) & 1); | |
230 | ||
231 | break; | |
232 | ||
233 | case GRIP_MODE_XT: | |
234 | ||
235 | if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) { | |
236 | grip->bads++; | |
237 | break; | |
238 | } | |
239 | ||
240 | input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f); | |
241 | input_report_abs(dev, ABS_Y, 63 - ((data[0] >> 8) & 0x3f)); | |
242 | input_report_abs(dev, ABS_BRAKE, (data[1] >> 2) & 0x3f); | |
243 | input_report_abs(dev, ABS_GAS, (data[1] >> 8) & 0x3f); | |
244 | input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f); | |
245 | ||
246 | input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1)); | |
247 | input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1)); | |
248 | input_report_abs(dev, ABS_HAT1X, ((data[2] >> 5) & 1) - ((data[2] >> 4) & 1)); | |
249 | input_report_abs(dev, ABS_HAT1Y, ((data[2] >> 6) & 1) - ((data[2] >> 7) & 1)); | |
250 | ||
251 | for (j = 0; j < 11; j++) | |
252 | input_report_key(dev, grip_btn_xt[j], (data[3] >> (j + 3)) & 1); | |
253 | break; | |
254 | ||
255 | case GRIP_MODE_DC: | |
256 | ||
257 | if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) { | |
258 | grip->bads++; | |
259 | break; | |
260 | } | |
261 | ||
262 | input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f); | |
263 | input_report_abs(dev, ABS_Y, (data[0] >> 8) & 0x3f); | |
264 | input_report_abs(dev, ABS_RX, (data[1] >> 2) & 0x3f); | |
265 | input_report_abs(dev, ABS_RY, (data[1] >> 8) & 0x3f); | |
266 | input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f); | |
267 | ||
268 | input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1)); | |
269 | input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1)); | |
270 | ||
271 | for (j = 0; j < 9; j++) | |
272 | input_report_key(dev, grip_btn_dc[j], (data[3] >> (j + 3)) & 1); | |
273 | break; | |
274 | ||
275 | ||
276 | } | |
277 | ||
278 | input_sync(dev); | |
279 | } | |
280 | } | |
281 | ||
282 | static int grip_open(struct input_dev *dev) | |
283 | { | |
284 | struct grip *grip = dev->private; | |
285 | ||
286 | gameport_start_polling(grip->gameport); | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static void grip_close(struct input_dev *dev) | |
291 | { | |
292 | struct grip *grip = dev->private; | |
293 | ||
294 | gameport_stop_polling(grip->gameport); | |
295 | } | |
296 | ||
297 | static int grip_connect(struct gameport *gameport, struct gameport_driver *drv) | |
298 | { | |
299 | struct grip *grip; | |
300 | unsigned int data[GRIP_LENGTH_XT]; | |
301 | int i, j, t; | |
302 | int err; | |
303 | ||
a97e148a | 304 | if (!(grip = kzalloc(sizeof(struct grip), GFP_KERNEL))) |
1da177e4 LT |
305 | return -ENOMEM; |
306 | ||
307 | grip->gameport = gameport; | |
308 | ||
309 | gameport_set_drvdata(gameport, grip); | |
310 | ||
311 | err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); | |
312 | if (err) | |
313 | goto fail1; | |
314 | ||
315 | for (i = 0; i < 2; i++) { | |
316 | if (!grip_gpp_read_packet(gameport, (i << 1) + 4, data)) { | |
317 | grip->mode[i] = GRIP_MODE_GPP; | |
318 | continue; | |
319 | } | |
320 | if (!grip_xt_read_packet(gameport, (i << 1) + 4, data)) { | |
321 | if (!(data[3] & 7)) { | |
322 | grip->mode[i] = GRIP_MODE_BD; | |
323 | continue; | |
324 | } | |
325 | if (!(data[2] & 0xf0)) { | |
326 | grip->mode[i] = GRIP_MODE_XT; | |
327 | continue; | |
328 | } | |
329 | grip->mode[i] = GRIP_MODE_DC; | |
330 | continue; | |
331 | } | |
332 | } | |
333 | ||
334 | if (!grip->mode[0] && !grip->mode[1]) { | |
335 | err = -ENODEV; | |
336 | goto fail2; | |
337 | } | |
338 | ||
339 | gameport_set_poll_handler(gameport, grip_poll); | |
340 | gameport_set_poll_interval(gameport, 20); | |
341 | ||
342 | for (i = 0; i < 2; i++) | |
343 | if (grip->mode[i]) { | |
344 | ||
345 | sprintf(grip->phys[i], "%s/input%d", gameport->phys, i); | |
346 | ||
347 | grip->dev[i].private = grip; | |
348 | ||
349 | grip->dev[i].open = grip_open; | |
350 | grip->dev[i].close = grip_close; | |
351 | ||
352 | grip->dev[i].name = grip_name[grip->mode[i]]; | |
353 | grip->dev[i].phys = grip->phys[i]; | |
354 | grip->dev[i].id.bustype = BUS_GAMEPORT; | |
355 | grip->dev[i].id.vendor = GAMEPORT_ID_VENDOR_GRAVIS; | |
356 | grip->dev[i].id.product = grip->mode[i]; | |
357 | grip->dev[i].id.version = 0x0100; | |
358 | ||
359 | grip->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); | |
360 | ||
361 | for (j = 0; (t = grip_abs[grip->mode[i]][j]) >= 0; j++) { | |
362 | ||
363 | if (j < grip_cen[grip->mode[i]]) | |
364 | input_set_abs_params(&grip->dev[i], t, 14, 52, 1, 2); | |
365 | else if (j < grip_anx[grip->mode[i]]) | |
366 | input_set_abs_params(&grip->dev[i], t, 3, 57, 1, 0); | |
367 | else | |
368 | input_set_abs_params(&grip->dev[i], t, -1, 1, 0, 0); | |
369 | } | |
370 | ||
371 | for (j = 0; (t = grip_btn[grip->mode[i]][j]) >= 0; j++) | |
372 | if (t > 0) | |
373 | set_bit(t, grip->dev[i].keybit); | |
374 | ||
375 | printk(KERN_INFO "input: %s on %s\n", | |
376 | grip_name[grip->mode[i]], gameport->phys); | |
377 | input_register_device(grip->dev + i); | |
378 | } | |
379 | ||
380 | return 0; | |
381 | ||
382 | fail2: gameport_close(gameport); | |
383 | fail1: gameport_set_drvdata(gameport, NULL); | |
384 | kfree(grip); | |
385 | return err; | |
386 | } | |
387 | ||
388 | static void grip_disconnect(struct gameport *gameport) | |
389 | { | |
390 | struct grip *grip = gameport_get_drvdata(gameport); | |
391 | int i; | |
392 | ||
393 | for (i = 0; i < 2; i++) | |
394 | if (grip->mode[i]) | |
395 | input_unregister_device(grip->dev + i); | |
396 | gameport_close(gameport); | |
397 | gameport_set_drvdata(gameport, NULL); | |
398 | kfree(grip); | |
399 | } | |
400 | ||
401 | static struct gameport_driver grip_drv = { | |
402 | .driver = { | |
403 | .name = "grip", | |
404 | }, | |
405 | .description = DRIVER_DESC, | |
406 | .connect = grip_connect, | |
407 | .disconnect = grip_disconnect, | |
408 | }; | |
409 | ||
410 | static int __init grip_init(void) | |
411 | { | |
412 | gameport_register_driver(&grip_drv); | |
413 | return 0; | |
414 | } | |
415 | ||
416 | static void __exit grip_exit(void) | |
417 | { | |
418 | gameport_unregister_driver(&grip_drv); | |
419 | } | |
420 | ||
421 | module_init(grip_init); | |
422 | module_exit(grip_exit); |