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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> | |
4e57b681 | 37 | #include <linux/jiffies.h> |
1da177e4 LT |
38 | |
39 | #define DRIVER_DESC "Gravis GrIP protocol joystick driver" | |
40 | ||
41 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
42 | MODULE_DESCRIPTION(DRIVER_DESC); | |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
45 | #define GRIP_MODE_GPP 1 | |
46 | #define GRIP_MODE_BD 2 | |
47 | #define GRIP_MODE_XT 3 | |
48 | #define GRIP_MODE_DC 4 | |
49 | ||
50 | #define GRIP_LENGTH_GPP 24 | |
51 | #define GRIP_STROBE_GPP 200 /* 200 us */ | |
52 | #define GRIP_LENGTH_XT 4 | |
53 | #define GRIP_STROBE_XT 64 /* 64 us */ | |
54 | #define GRIP_MAX_CHUNKS_XT 10 | |
55 | #define GRIP_MAX_BITS_XT 30 | |
56 | ||
57 | struct grip { | |
58 | struct gameport *gameport; | |
17dd3f0f | 59 | struct input_dev *dev[2]; |
1da177e4 LT |
60 | unsigned char mode[2]; |
61 | int reads; | |
62 | int bads; | |
63 | char phys[2][32]; | |
64 | }; | |
65 | ||
66 | 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 }; | |
67 | static int grip_btn_bd[] = { BTN_THUMB, BTN_THUMB2, BTN_TRIGGER, BTN_TOP, BTN_BASE, -1 }; | |
68 | 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 }; | |
69 | static int grip_btn_dc[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, -1 }; | |
70 | ||
71 | static int grip_abs_gpp[] = { ABS_X, ABS_Y, -1 }; | |
72 | static int grip_abs_bd[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 }; | |
73 | static int grip_abs_xt[] = { ABS_X, ABS_Y, ABS_BRAKE, ABS_GAS, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, -1 }; | |
74 | static int grip_abs_dc[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 }; | |
75 | ||
76 | static char *grip_name[] = { NULL, "Gravis GamePad Pro", "Gravis Blackhawk Digital", | |
77 | "Gravis Xterminator Digital", "Gravis Xterminator DualControl" }; | |
78 | static int *grip_abs[] = { NULL, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc }; | |
79 | static int *grip_btn[] = { NULL, grip_btn_gpp, grip_btn_bd, grip_btn_xt, grip_btn_dc }; | |
80 | static char grip_anx[] = { 0, 0, 3, 5, 5 }; | |
81 | static char grip_cen[] = { 0, 0, 2, 2, 4 }; | |
82 | ||
83 | /* | |
84 | * grip_gpp_read_packet() reads a Gravis GamePad Pro packet. | |
85 | */ | |
86 | ||
87 | static int grip_gpp_read_packet(struct gameport *gameport, int shift, unsigned int *data) | |
88 | { | |
89 | unsigned long flags; | |
90 | unsigned char u, v; | |
91 | unsigned int t; | |
92 | int i; | |
93 | ||
94 | int strobe = gameport_time(gameport, GRIP_STROBE_GPP); | |
95 | ||
96 | data[0] = 0; | |
97 | t = strobe; | |
98 | i = 0; | |
99 | ||
100 | local_irq_save(flags); | |
101 | ||
102 | v = gameport_read(gameport) >> shift; | |
103 | ||
104 | do { | |
105 | t--; | |
106 | u = v; v = (gameport_read(gameport) >> shift) & 3; | |
107 | if (~v & u & 1) { | |
108 | data[0] |= (v >> 1) << i++; | |
109 | t = strobe; | |
110 | } | |
111 | } while (i < GRIP_LENGTH_GPP && t > 0); | |
112 | ||
113 | local_irq_restore(flags); | |
114 | ||
115 | if (i < GRIP_LENGTH_GPP) return -1; | |
116 | ||
117 | for (i = 0; i < GRIP_LENGTH_GPP && (data[0] & 0xfe4210) ^ 0x7c0000; i++) | |
118 | data[0] = data[0] >> 1 | (data[0] & 1) << (GRIP_LENGTH_GPP - 1); | |
119 | ||
120 | return -(i == GRIP_LENGTH_GPP); | |
121 | } | |
122 | ||
123 | /* | |
124 | * grip_xt_read_packet() reads a Gravis Xterminator packet. | |
125 | */ | |
126 | ||
127 | static int grip_xt_read_packet(struct gameport *gameport, int shift, unsigned int *data) | |
128 | { | |
129 | unsigned int i, j, buf, crc; | |
130 | unsigned char u, v, w; | |
131 | unsigned long flags; | |
132 | unsigned int t; | |
133 | char status; | |
134 | ||
135 | int strobe = gameport_time(gameport, GRIP_STROBE_XT); | |
136 | ||
137 | data[0] = data[1] = data[2] = data[3] = 0; | |
138 | status = buf = i = j = 0; | |
139 | t = strobe; | |
140 | ||
141 | local_irq_save(flags); | |
142 | ||
143 | v = w = (gameport_read(gameport) >> shift) & 3; | |
144 | ||
145 | do { | |
146 | t--; | |
147 | u = (gameport_read(gameport) >> shift) & 3; | |
148 | ||
149 | if (u ^ v) { | |
150 | ||
151 | if ((u ^ v) & 1) { | |
152 | buf = (buf << 1) | (u >> 1); | |
153 | t = strobe; | |
154 | i++; | |
155 | } else | |
156 | ||
157 | if ((((u ^ v) & (v ^ w)) >> 1) & ~(u | v | w) & 1) { | |
158 | if (i == 20) { | |
159 | crc = buf ^ (buf >> 7) ^ (buf >> 14); | |
160 | if (!((crc ^ (0x25cb9e70 >> ((crc >> 2) & 0x1c))) & 0xf)) { | |
161 | data[buf >> 18] = buf >> 4; | |
162 | status |= 1 << (buf >> 18); | |
163 | } | |
164 | j++; | |
165 | } | |
166 | t = strobe; | |
167 | buf = 0; | |
168 | i = 0; | |
169 | } | |
170 | w = v; | |
171 | v = u; | |
172 | } | |
173 | ||
174 | } while (status != 0xf && i < GRIP_MAX_BITS_XT && j < GRIP_MAX_CHUNKS_XT && t > 0); | |
175 | ||
176 | local_irq_restore(flags); | |
177 | ||
178 | return -(status != 0xf); | |
179 | } | |
180 | ||
181 | /* | |
182 | * grip_timer() repeatedly polls the joysticks and generates events. | |
183 | */ | |
184 | ||
185 | static void grip_poll(struct gameport *gameport) | |
186 | { | |
187 | struct grip *grip = gameport_get_drvdata(gameport); | |
188 | unsigned int data[GRIP_LENGTH_XT]; | |
189 | struct input_dev *dev; | |
190 | int i, j; | |
191 | ||
192 | for (i = 0; i < 2; i++) { | |
193 | ||
17dd3f0f | 194 | dev = grip->dev[i]; |
3575c341 DT |
195 | if (!dev) |
196 | continue; | |
197 | ||
1da177e4 LT |
198 | grip->reads++; |
199 | ||
200 | switch (grip->mode[i]) { | |
201 | ||
202 | case GRIP_MODE_GPP: | |
203 | ||
204 | if (grip_gpp_read_packet(grip->gameport, (i << 1) + 4, data)) { | |
205 | grip->bads++; | |
206 | break; | |
207 | } | |
208 | ||
209 | input_report_abs(dev, ABS_X, ((*data >> 15) & 1) - ((*data >> 16) & 1)); | |
210 | input_report_abs(dev, ABS_Y, ((*data >> 13) & 1) - ((*data >> 12) & 1)); | |
211 | ||
212 | for (j = 0; j < 12; j++) | |
213 | if (grip_btn_gpp[j]) | |
214 | input_report_key(dev, grip_btn_gpp[j], (*data >> j) & 1); | |
215 | ||
216 | break; | |
217 | ||
218 | case GRIP_MODE_BD: | |
219 | ||
220 | if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) { | |
221 | grip->bads++; | |
222 | break; | |
223 | } | |
224 | ||
225 | input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f); | |
226 | input_report_abs(dev, ABS_Y, 63 - ((data[0] >> 8) & 0x3f)); | |
227 | input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f); | |
228 | ||
229 | input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1)); | |
230 | input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1)); | |
231 | ||
232 | for (j = 0; j < 5; j++) | |
233 | input_report_key(dev, grip_btn_bd[j], (data[3] >> (j + 4)) & 1); | |
234 | ||
235 | break; | |
236 | ||
237 | case GRIP_MODE_XT: | |
238 | ||
239 | if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) { | |
240 | grip->bads++; | |
241 | break; | |
242 | } | |
243 | ||
244 | input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f); | |
245 | input_report_abs(dev, ABS_Y, 63 - ((data[0] >> 8) & 0x3f)); | |
246 | input_report_abs(dev, ABS_BRAKE, (data[1] >> 2) & 0x3f); | |
247 | input_report_abs(dev, ABS_GAS, (data[1] >> 8) & 0x3f); | |
248 | input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f); | |
249 | ||
250 | input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1)); | |
251 | input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1)); | |
252 | input_report_abs(dev, ABS_HAT1X, ((data[2] >> 5) & 1) - ((data[2] >> 4) & 1)); | |
253 | input_report_abs(dev, ABS_HAT1Y, ((data[2] >> 6) & 1) - ((data[2] >> 7) & 1)); | |
254 | ||
255 | for (j = 0; j < 11; j++) | |
256 | input_report_key(dev, grip_btn_xt[j], (data[3] >> (j + 3)) & 1); | |
257 | break; | |
258 | ||
259 | case GRIP_MODE_DC: | |
260 | ||
261 | if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) { | |
262 | grip->bads++; | |
263 | break; | |
264 | } | |
265 | ||
266 | input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f); | |
267 | input_report_abs(dev, ABS_Y, (data[0] >> 8) & 0x3f); | |
268 | input_report_abs(dev, ABS_RX, (data[1] >> 2) & 0x3f); | |
269 | input_report_abs(dev, ABS_RY, (data[1] >> 8) & 0x3f); | |
270 | input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f); | |
271 | ||
272 | input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1)); | |
273 | input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1)); | |
274 | ||
275 | for (j = 0; j < 9; j++) | |
276 | input_report_key(dev, grip_btn_dc[j], (data[3] >> (j + 3)) & 1); | |
277 | break; | |
278 | ||
279 | ||
280 | } | |
281 | ||
282 | input_sync(dev); | |
283 | } | |
284 | } | |
285 | ||
286 | static int grip_open(struct input_dev *dev) | |
287 | { | |
8715c1cf | 288 | struct grip *grip = input_get_drvdata(dev); |
1da177e4 LT |
289 | |
290 | gameport_start_polling(grip->gameport); | |
291 | return 0; | |
292 | } | |
293 | ||
294 | static void grip_close(struct input_dev *dev) | |
295 | { | |
8715c1cf | 296 | struct grip *grip = input_get_drvdata(dev); |
1da177e4 LT |
297 | |
298 | gameport_stop_polling(grip->gameport); | |
299 | } | |
300 | ||
301 | static int grip_connect(struct gameport *gameport, struct gameport_driver *drv) | |
302 | { | |
303 | struct grip *grip; | |
17dd3f0f | 304 | struct input_dev *input_dev; |
1da177e4 LT |
305 | unsigned int data[GRIP_LENGTH_XT]; |
306 | int i, j, t; | |
307 | int err; | |
308 | ||
a97e148a | 309 | if (!(grip = kzalloc(sizeof(struct grip), GFP_KERNEL))) |
1da177e4 LT |
310 | return -ENOMEM; |
311 | ||
312 | grip->gameport = gameport; | |
313 | ||
314 | gameport_set_drvdata(gameport, grip); | |
315 | ||
316 | err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); | |
317 | if (err) | |
318 | goto fail1; | |
319 | ||
320 | for (i = 0; i < 2; i++) { | |
321 | if (!grip_gpp_read_packet(gameport, (i << 1) + 4, data)) { | |
322 | grip->mode[i] = GRIP_MODE_GPP; | |
323 | continue; | |
324 | } | |
325 | if (!grip_xt_read_packet(gameport, (i << 1) + 4, data)) { | |
326 | if (!(data[3] & 7)) { | |
327 | grip->mode[i] = GRIP_MODE_BD; | |
328 | continue; | |
329 | } | |
330 | if (!(data[2] & 0xf0)) { | |
331 | grip->mode[i] = GRIP_MODE_XT; | |
332 | continue; | |
333 | } | |
334 | grip->mode[i] = GRIP_MODE_DC; | |
335 | continue; | |
336 | } | |
337 | } | |
338 | ||
339 | if (!grip->mode[0] && !grip->mode[1]) { | |
340 | err = -ENODEV; | |
341 | goto fail2; | |
342 | } | |
343 | ||
344 | gameport_set_poll_handler(gameport, grip_poll); | |
345 | gameport_set_poll_interval(gameport, 20); | |
346 | ||
17dd3f0f DT |
347 | for (i = 0; i < 2; i++) { |
348 | if (!grip->mode[i]) | |
349 | continue; | |
1da177e4 | 350 | |
17dd3f0f DT |
351 | grip->dev[i] = input_dev = input_allocate_device(); |
352 | if (!input_dev) { | |
353 | err = -ENOMEM; | |
354 | goto fail3; | |
355 | } | |
1da177e4 | 356 | |
10ca4c0a DT |
357 | snprintf(grip->phys[i], sizeof(grip->phys[i]), |
358 | "%s/input%d", gameport->phys, i); | |
1da177e4 | 359 | |
17dd3f0f DT |
360 | input_dev->name = grip_name[grip->mode[i]]; |
361 | input_dev->phys = grip->phys[i]; | |
362 | input_dev->id.bustype = BUS_GAMEPORT; | |
363 | input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS; | |
364 | input_dev->id.product = grip->mode[i]; | |
365 | input_dev->id.version = 0x0100; | |
935e658e | 366 | input_dev->dev.parent = &gameport->dev; |
8715c1cf DT |
367 | |
368 | input_set_drvdata(input_dev, grip); | |
1da177e4 | 369 | |
17dd3f0f DT |
370 | input_dev->open = grip_open; |
371 | input_dev->close = grip_close; | |
1da177e4 | 372 | |
17dd3f0f | 373 | input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); |
1da177e4 | 374 | |
17dd3f0f | 375 | for (j = 0; (t = grip_abs[grip->mode[i]][j]) >= 0; j++) { |
1da177e4 | 376 | |
17dd3f0f DT |
377 | if (j < grip_cen[grip->mode[i]]) |
378 | input_set_abs_params(input_dev, t, 14, 52, 1, 2); | |
379 | else if (j < grip_anx[grip->mode[i]]) | |
380 | input_set_abs_params(input_dev, t, 3, 57, 1, 0); | |
381 | else | |
382 | input_set_abs_params(input_dev, t, -1, 1, 0, 0); | |
383 | } | |
1da177e4 | 384 | |
17dd3f0f DT |
385 | for (j = 0; (t = grip_btn[grip->mode[i]][j]) >= 0; j++) |
386 | if (t > 0) | |
387 | set_bit(t, input_dev->keybit); | |
1da177e4 | 388 | |
0399addd DT |
389 | err = input_register_device(grip->dev[i]); |
390 | if (err) | |
391 | goto fail4; | |
17dd3f0f | 392 | } |
1da177e4 LT |
393 | |
394 | return 0; | |
395 | ||
0399addd DT |
396 | fail4: input_free_device(grip->dev[i]); |
397 | fail3: while (--i >= 0) | |
17dd3f0f DT |
398 | if (grip->dev[i]) |
399 | input_unregister_device(grip->dev[i]); | |
400 | fail2: gameport_close(gameport); | |
401 | fail1: gameport_set_drvdata(gameport, NULL); | |
1da177e4 LT |
402 | kfree(grip); |
403 | return err; | |
404 | } | |
405 | ||
406 | static void grip_disconnect(struct gameport *gameport) | |
407 | { | |
408 | struct grip *grip = gameport_get_drvdata(gameport); | |
409 | int i; | |
410 | ||
411 | for (i = 0; i < 2; i++) | |
17dd3f0f DT |
412 | if (grip->dev[i]) |
413 | input_unregister_device(grip->dev[i]); | |
1da177e4 LT |
414 | gameport_close(gameport); |
415 | gameport_set_drvdata(gameport, NULL); | |
416 | kfree(grip); | |
417 | } | |
418 | ||
419 | static struct gameport_driver grip_drv = { | |
420 | .driver = { | |
421 | .name = "grip", | |
0399addd | 422 | .owner = THIS_MODULE, |
1da177e4 LT |
423 | }, |
424 | .description = DRIVER_DESC, | |
425 | .connect = grip_connect, | |
426 | .disconnect = grip_disconnect, | |
427 | }; | |
428 | ||
429 | static int __init grip_init(void) | |
430 | { | |
431 | gameport_register_driver(&grip_drv); | |
432 | return 0; | |
433 | } | |
434 | ||
435 | static void __exit grip_exit(void) | |
436 | { | |
437 | gameport_unregister_driver(&grip_drv); | |
438 | } | |
439 | ||
440 | module_init(grip_init); | |
441 | module_exit(grip_exit); |