Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Input driver to ExplorerPS/2 device driver module. | |
3 | * | |
4 | * Copyright (c) 1999-2002 Vojtech Pavlik | |
5 | * Copyright (c) 2004 Dmitry Torokhov | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as published by | |
9 | * the Free Software Foundation. | |
10 | */ | |
11 | ||
4f00469c | 12 | #define MOUSEDEV_MINOR_BASE 32 |
1da177e4 LT |
13 | #define MOUSEDEV_MINORS 32 |
14 | #define MOUSEDEV_MIX 31 | |
15 | ||
a99bbaf5 | 16 | #include <linux/sched.h> |
1da177e4 LT |
17 | #include <linux/slab.h> |
18 | #include <linux/poll.h> | |
19 | #include <linux/module.h> | |
1da177e4 LT |
20 | #include <linux/init.h> |
21 | #include <linux/input.h> | |
1da177e4 LT |
22 | #include <linux/random.h> |
23 | #include <linux/major.h> | |
24 | #include <linux/device.h> | |
987a6c02 | 25 | #include <linux/kernel.h> |
1da177e4 LT |
26 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX |
27 | #include <linux/miscdevice.h> | |
28 | #endif | |
29 | ||
30 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
31 | MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces"); | |
32 | MODULE_LICENSE("GPL"); | |
33 | ||
34 | #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X | |
35 | #define CONFIG_INPUT_MOUSEDEV_SCREEN_X 1024 | |
36 | #endif | |
37 | #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y | |
38 | #define CONFIG_INPUT_MOUSEDEV_SCREEN_Y 768 | |
39 | #endif | |
40 | ||
41 | static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X; | |
84c12b24 | 42 | module_param(xres, uint, 0644); |
1da177e4 LT |
43 | MODULE_PARM_DESC(xres, "Horizontal screen resolution"); |
44 | ||
45 | static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y; | |
84c12b24 | 46 | module_param(yres, uint, 0644); |
1da177e4 LT |
47 | MODULE_PARM_DESC(yres, "Vertical screen resolution"); |
48 | ||
49 | static unsigned tap_time = 200; | |
84c12b24 | 50 | module_param(tap_time, uint, 0644); |
1da177e4 LT |
51 | MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)"); |
52 | ||
53 | struct mousedev_hw_data { | |
54 | int dx, dy, dz; | |
55 | int x, y; | |
56 | int abs_event; | |
57 | unsigned long buttons; | |
58 | }; | |
59 | ||
60 | struct mousedev { | |
1da177e4 LT |
61 | int open; |
62 | int minor; | |
464b2415 | 63 | struct input_handle handle; |
1da177e4 | 64 | wait_queue_head_t wait; |
d0ffb9be | 65 | struct list_head client_list; |
464b2415 DT |
66 | spinlock_t client_lock; /* protects client_list */ |
67 | struct mutex mutex; | |
9657d75c | 68 | struct device dev; |
20da92de | 69 | bool exist; |
1da177e4 | 70 | |
d542ed82 DT |
71 | struct list_head mixdev_node; |
72 | int mixdev_open; | |
73 | ||
1da177e4 LT |
74 | struct mousedev_hw_data packet; |
75 | unsigned int pkt_count; | |
76 | int old_x[4], old_y[4]; | |
77 | int frac_dx, frac_dy; | |
78 | unsigned long touch; | |
79 | }; | |
80 | ||
81 | enum mousedev_emul { | |
82 | MOUSEDEV_EMUL_PS2, | |
83 | MOUSEDEV_EMUL_IMPS, | |
84 | MOUSEDEV_EMUL_EXPS | |
85 | }; | |
86 | ||
87 | struct mousedev_motion { | |
88 | int dx, dy, dz; | |
89 | unsigned long buttons; | |
90 | }; | |
91 | ||
92 | #define PACKET_QUEUE_LEN 16 | |
d0ffb9be | 93 | struct mousedev_client { |
1da177e4 LT |
94 | struct fasync_struct *fasync; |
95 | struct mousedev *mousedev; | |
96 | struct list_head node; | |
97 | ||
98 | struct mousedev_motion packets[PACKET_QUEUE_LEN]; | |
99 | unsigned int head, tail; | |
100 | spinlock_t packet_lock; | |
101 | int pos_x, pos_y; | |
102 | ||
103 | signed char ps2[6]; | |
104 | unsigned char ready, buffer, bufsiz; | |
105 | unsigned char imexseq, impsseq; | |
106 | enum mousedev_emul mode; | |
c1e4c8d3 | 107 | unsigned long last_buttons; |
1da177e4 LT |
108 | }; |
109 | ||
110 | #define MOUSEDEV_SEQ_LEN 6 | |
111 | ||
112 | static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 }; | |
113 | static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 }; | |
114 | ||
115 | static struct input_handler mousedev_handler; | |
116 | ||
117 | static struct mousedev *mousedev_table[MOUSEDEV_MINORS]; | |
464b2415 | 118 | static DEFINE_MUTEX(mousedev_table_mutex); |
9657d75c | 119 | static struct mousedev *mousedev_mix; |
d542ed82 | 120 | static LIST_HEAD(mousedev_mix_list); |
1da177e4 | 121 | |
464b2415 DT |
122 | static void mixdev_open_devices(void); |
123 | static void mixdev_close_devices(void); | |
124 | ||
1da177e4 LT |
125 | #define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03]) |
126 | #define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03]) | |
127 | ||
464b2415 DT |
128 | static void mousedev_touchpad_event(struct input_dev *dev, |
129 | struct mousedev *mousedev, | |
130 | unsigned int code, int value) | |
1da177e4 LT |
131 | { |
132 | int size, tmp; | |
133 | enum { FRACTION_DENOM = 128 }; | |
134 | ||
0d9d93c4 | 135 | switch (code) { |
1da177e4 | 136 | |
464b2415 | 137 | case ABS_X: |
987a6c02 | 138 | |
464b2415 DT |
139 | fx(0) = value; |
140 | if (mousedev->touch && mousedev->pkt_count >= 2) { | |
268ba5c0 CF |
141 | size = input_abs_get_max(dev, ABS_X) - |
142 | input_abs_get_min(dev, ABS_X); | |
464b2415 DT |
143 | if (size == 0) |
144 | size = 256 * 2; | |
987a6c02 | 145 | |
464b2415 DT |
146 | tmp = ((value - fx(2)) * 256 * FRACTION_DENOM) / size; |
147 | tmp += mousedev->frac_dx; | |
148 | mousedev->packet.dx = tmp / FRACTION_DENOM; | |
149 | mousedev->frac_dx = | |
150 | tmp - mousedev->packet.dx * FRACTION_DENOM; | |
151 | } | |
152 | break; | |
153 | ||
154 | case ABS_Y: | |
155 | fy(0) = value; | |
156 | if (mousedev->touch && mousedev->pkt_count >= 2) { | |
987a6c02 | 157 | /* use X size for ABS_Y to keep the same scale */ |
268ba5c0 CF |
158 | size = input_abs_get_max(dev, ABS_X) - |
159 | input_abs_get_min(dev, ABS_X); | |
464b2415 DT |
160 | if (size == 0) |
161 | size = 256 * 2; | |
987a6c02 | 162 | |
464b2415 DT |
163 | tmp = -((value - fy(2)) * 256 * FRACTION_DENOM) / size; |
164 | tmp += mousedev->frac_dy; | |
165 | mousedev->packet.dy = tmp / FRACTION_DENOM; | |
166 | mousedev->frac_dy = tmp - | |
167 | mousedev->packet.dy * FRACTION_DENOM; | |
168 | } | |
169 | break; | |
1da177e4 LT |
170 | } |
171 | } | |
172 | ||
464b2415 DT |
173 | static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, |
174 | unsigned int code, int value) | |
1da177e4 | 175 | { |
987a6c02 | 176 | int min, max, size; |
1da177e4 LT |
177 | |
178 | switch (code) { | |
1da177e4 | 179 | |
464b2415 | 180 | case ABS_X: |
987a6c02 DM |
181 | min = input_abs_get_min(dev, ABS_X); |
182 | max = input_abs_get_max(dev, ABS_X); | |
183 | ||
184 | size = max - min; | |
464b2415 DT |
185 | if (size == 0) |
186 | size = xres ? : 1; | |
987a6c02 DM |
187 | |
188 | clamp(value, min, max); | |
189 | ||
190 | mousedev->packet.x = ((value - min) * xres) / size; | |
464b2415 DT |
191 | mousedev->packet.abs_event = 1; |
192 | break; | |
193 | ||
194 | case ABS_Y: | |
987a6c02 DM |
195 | min = input_abs_get_min(dev, ABS_Y); |
196 | max = input_abs_get_max(dev, ABS_Y); | |
197 | ||
198 | size = max - min; | |
464b2415 DT |
199 | if (size == 0) |
200 | size = yres ? : 1; | |
987a6c02 DM |
201 | |
202 | clamp(value, min, max); | |
203 | ||
204 | mousedev->packet.y = yres - ((value - min) * yres) / size; | |
464b2415 DT |
205 | mousedev->packet.abs_event = 1; |
206 | break; | |
1da177e4 LT |
207 | } |
208 | } | |
209 | ||
464b2415 DT |
210 | static void mousedev_rel_event(struct mousedev *mousedev, |
211 | unsigned int code, int value) | |
1da177e4 LT |
212 | { |
213 | switch (code) { | |
464b2415 DT |
214 | case REL_X: |
215 | mousedev->packet.dx += value; | |
216 | break; | |
217 | ||
218 | case REL_Y: | |
219 | mousedev->packet.dy -= value; | |
220 | break; | |
221 | ||
222 | case REL_WHEEL: | |
223 | mousedev->packet.dz -= value; | |
224 | break; | |
1da177e4 LT |
225 | } |
226 | } | |
227 | ||
464b2415 DT |
228 | static void mousedev_key_event(struct mousedev *mousedev, |
229 | unsigned int code, int value) | |
1da177e4 LT |
230 | { |
231 | int index; | |
232 | ||
233 | switch (code) { | |
464b2415 DT |
234 | |
235 | case BTN_TOUCH: | |
236 | case BTN_0: | |
237 | case BTN_LEFT: index = 0; break; | |
238 | ||
239 | case BTN_STYLUS: | |
240 | case BTN_1: | |
241 | case BTN_RIGHT: index = 1; break; | |
242 | ||
243 | case BTN_2: | |
244 | case BTN_FORWARD: | |
245 | case BTN_STYLUS2: | |
246 | case BTN_MIDDLE: index = 2; break; | |
247 | ||
248 | case BTN_3: | |
249 | case BTN_BACK: | |
250 | case BTN_SIDE: index = 3; break; | |
251 | ||
252 | case BTN_4: | |
253 | case BTN_EXTRA: index = 4; break; | |
254 | ||
255 | default: return; | |
1da177e4 LT |
256 | } |
257 | ||
258 | if (value) { | |
259 | set_bit(index, &mousedev->packet.buttons); | |
9657d75c | 260 | set_bit(index, &mousedev_mix->packet.buttons); |
1da177e4 LT |
261 | } else { |
262 | clear_bit(index, &mousedev->packet.buttons); | |
9657d75c | 263 | clear_bit(index, &mousedev_mix->packet.buttons); |
1da177e4 LT |
264 | } |
265 | } | |
266 | ||
464b2415 DT |
267 | static void mousedev_notify_readers(struct mousedev *mousedev, |
268 | struct mousedev_hw_data *packet) | |
1da177e4 | 269 | { |
d0ffb9be | 270 | struct mousedev_client *client; |
1da177e4 | 271 | struct mousedev_motion *p; |
464b2415 | 272 | unsigned int new_head; |
8121152c | 273 | int wake_readers = 0; |
1da177e4 | 274 | |
82ba56c2 | 275 | rcu_read_lock(); |
464b2415 DT |
276 | list_for_each_entry_rcu(client, &mousedev->client_list, node) { |
277 | ||
278 | /* Just acquire the lock, interrupts already disabled */ | |
279 | spin_lock(&client->packet_lock); | |
1da177e4 | 280 | |
d0ffb9be DT |
281 | p = &client->packets[client->head]; |
282 | if (client->ready && p->buttons != mousedev->packet.buttons) { | |
464b2415 | 283 | new_head = (client->head + 1) % PACKET_QUEUE_LEN; |
d0ffb9be DT |
284 | if (new_head != client->tail) { |
285 | p = &client->packets[client->head = new_head]; | |
1da177e4 LT |
286 | memset(p, 0, sizeof(struct mousedev_motion)); |
287 | } | |
288 | } | |
289 | ||
290 | if (packet->abs_event) { | |
d0ffb9be DT |
291 | p->dx += packet->x - client->pos_x; |
292 | p->dy += packet->y - client->pos_y; | |
293 | client->pos_x = packet->x; | |
294 | client->pos_y = packet->y; | |
1da177e4 LT |
295 | } |
296 | ||
d0ffb9be | 297 | client->pos_x += packet->dx; |
464b2415 DT |
298 | client->pos_x = client->pos_x < 0 ? |
299 | 0 : (client->pos_x >= xres ? xres : client->pos_x); | |
d0ffb9be | 300 | client->pos_y += packet->dy; |
464b2415 DT |
301 | client->pos_y = client->pos_y < 0 ? |
302 | 0 : (client->pos_y >= yres ? yres : client->pos_y); | |
1da177e4 LT |
303 | |
304 | p->dx += packet->dx; | |
305 | p->dy += packet->dy; | |
306 | p->dz += packet->dz; | |
307 | p->buttons = mousedev->packet.buttons; | |
308 | ||
464b2415 DT |
309 | if (p->dx || p->dy || p->dz || |
310 | p->buttons != client->last_buttons) | |
d0ffb9be | 311 | client->ready = 1; |
1da177e4 | 312 | |
464b2415 | 313 | spin_unlock(&client->packet_lock); |
c1e4c8d3 | 314 | |
d0ffb9be DT |
315 | if (client->ready) { |
316 | kill_fasync(&client->fasync, SIGIO, POLL_IN); | |
8121152c DT |
317 | wake_readers = 1; |
318 | } | |
1da177e4 | 319 | } |
82ba56c2 | 320 | rcu_read_unlock(); |
1da177e4 | 321 | |
8121152c DT |
322 | if (wake_readers) |
323 | wake_up_interruptible(&mousedev->wait); | |
1da177e4 LT |
324 | } |
325 | ||
326 | static void mousedev_touchpad_touch(struct mousedev *mousedev, int value) | |
327 | { | |
328 | if (!value) { | |
329 | if (mousedev->touch && | |
464b2415 DT |
330 | time_before(jiffies, |
331 | mousedev->touch + msecs_to_jiffies(tap_time))) { | |
1da177e4 LT |
332 | /* |
333 | * Toggle left button to emulate tap. | |
334 | * We rely on the fact that mousedev_mix always has 0 | |
335 | * motion packet so we won't mess current position. | |
336 | */ | |
337 | set_bit(0, &mousedev->packet.buttons); | |
9657d75c DT |
338 | set_bit(0, &mousedev_mix->packet.buttons); |
339 | mousedev_notify_readers(mousedev, &mousedev_mix->packet); | |
464b2415 DT |
340 | mousedev_notify_readers(mousedev_mix, |
341 | &mousedev_mix->packet); | |
1da177e4 | 342 | clear_bit(0, &mousedev->packet.buttons); |
9657d75c | 343 | clear_bit(0, &mousedev_mix->packet.buttons); |
1da177e4 LT |
344 | } |
345 | mousedev->touch = mousedev->pkt_count = 0; | |
346 | mousedev->frac_dx = 0; | |
347 | mousedev->frac_dy = 0; | |
1e0afb28 DT |
348 | |
349 | } else if (!mousedev->touch) | |
350 | mousedev->touch = jiffies; | |
1da177e4 LT |
351 | } |
352 | ||
464b2415 DT |
353 | static void mousedev_event(struct input_handle *handle, |
354 | unsigned int type, unsigned int code, int value) | |
1da177e4 LT |
355 | { |
356 | struct mousedev *mousedev = handle->private; | |
357 | ||
358 | switch (type) { | |
1da177e4 | 359 | |
464b2415 DT |
360 | case EV_ABS: |
361 | /* Ignore joysticks */ | |
362 | if (test_bit(BTN_TRIGGER, handle->dev->keybit)) | |
363 | return; | |
1da177e4 | 364 | |
464b2415 DT |
365 | if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) |
366 | mousedev_touchpad_event(handle->dev, | |
367 | mousedev, code, value); | |
368 | else | |
369 | mousedev_abs_event(handle->dev, mousedev, code, value); | |
1da177e4 | 370 | |
464b2415 | 371 | break; |
1da177e4 | 372 | |
464b2415 DT |
373 | case EV_REL: |
374 | mousedev_rel_event(mousedev, code, value); | |
375 | break; | |
1da177e4 | 376 | |
464b2415 DT |
377 | case EV_KEY: |
378 | if (value != 2) { | |
379 | if (code == BTN_TOUCH && | |
380 | test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) | |
381 | mousedev_touchpad_touch(mousedev, value); | |
382 | else | |
383 | mousedev_key_event(mousedev, code, value); | |
384 | } | |
385 | break; | |
386 | ||
387 | case EV_SYN: | |
388 | if (code == SYN_REPORT) { | |
389 | if (mousedev->touch) { | |
390 | mousedev->pkt_count++; | |
391 | /* | |
392 | * Input system eats duplicate events, | |
393 | * but we need all of them to do correct | |
394 | * averaging so apply present one forward | |
395 | */ | |
396 | fx(0) = fx(1); | |
397 | fy(0) = fy(1); | |
1da177e4 | 398 | } |
464b2415 DT |
399 | |
400 | mousedev_notify_readers(mousedev, &mousedev->packet); | |
401 | mousedev_notify_readers(mousedev_mix, &mousedev->packet); | |
402 | ||
403 | mousedev->packet.dx = mousedev->packet.dy = | |
404 | mousedev->packet.dz = 0; | |
405 | mousedev->packet.abs_event = 0; | |
406 | } | |
407 | break; | |
1da177e4 LT |
408 | } |
409 | } | |
410 | ||
411 | static int mousedev_fasync(int fd, struct file *file, int on) | |
412 | { | |
d0ffb9be | 413 | struct mousedev_client *client = file->private_data; |
1e0afb28 | 414 | |
60aa4924 | 415 | return fasync_helper(fd, file, on, &client->fasync); |
1da177e4 LT |
416 | } |
417 | ||
9657d75c | 418 | static void mousedev_free(struct device *dev) |
1da177e4 | 419 | { |
9657d75c DT |
420 | struct mousedev *mousedev = container_of(dev, struct mousedev, dev); |
421 | ||
a7097ff8 | 422 | input_put_device(mousedev->handle.dev); |
1da177e4 LT |
423 | kfree(mousedev); |
424 | } | |
425 | ||
464b2415 | 426 | static int mousedev_open_device(struct mousedev *mousedev) |
1da177e4 | 427 | { |
464b2415 | 428 | int retval; |
1da177e4 | 429 | |
464b2415 DT |
430 | retval = mutex_lock_interruptible(&mousedev->mutex); |
431 | if (retval) | |
432 | return retval; | |
d542ed82 | 433 | |
464b2415 DT |
434 | if (mousedev->minor == MOUSEDEV_MIX) |
435 | mixdev_open_devices(); | |
436 | else if (!mousedev->exist) | |
437 | retval = -ENODEV; | |
06445014 | 438 | else if (!mousedev->open++) { |
464b2415 | 439 | retval = input_open_device(&mousedev->handle); |
06445014 ON |
440 | if (retval) |
441 | mousedev->open--; | |
442 | } | |
d542ed82 | 443 | |
464b2415 DT |
444 | mutex_unlock(&mousedev->mutex); |
445 | return retval; | |
d542ed82 DT |
446 | } |
447 | ||
464b2415 | 448 | static void mousedev_close_device(struct mousedev *mousedev) |
d542ed82 | 449 | { |
464b2415 | 450 | mutex_lock(&mousedev->mutex); |
d542ed82 | 451 | |
464b2415 DT |
452 | if (mousedev->minor == MOUSEDEV_MIX) |
453 | mixdev_close_devices(); | |
454 | else if (mousedev->exist && !--mousedev->open) | |
455 | input_close_device(&mousedev->handle); | |
456 | ||
457 | mutex_unlock(&mousedev->mutex); | |
d542ed82 DT |
458 | } |
459 | ||
464b2415 DT |
460 | /* |
461 | * Open all available devices so they can all be multiplexed in one. | |
462 | * stream. Note that this function is called with mousedev_mix->mutex | |
463 | * held. | |
464 | */ | |
d542ed82 DT |
465 | static void mixdev_open_devices(void) |
466 | { | |
467 | struct mousedev *mousedev; | |
468 | ||
9657d75c DT |
469 | if (mousedev_mix->open++) |
470 | return; | |
471 | ||
d542ed82 | 472 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { |
9657d75c | 473 | if (!mousedev->mixdev_open) { |
464b2415 DT |
474 | if (mousedev_open_device(mousedev)) |
475 | continue; | |
d542ed82 | 476 | |
9657d75c | 477 | mousedev->mixdev_open = 1; |
1da177e4 LT |
478 | } |
479 | } | |
1da177e4 LT |
480 | } |
481 | ||
464b2415 DT |
482 | /* |
483 | * Close all devices that were opened as part of multiplexed | |
484 | * device. Note that this function is called with mousedev_mix->mutex | |
485 | * held. | |
486 | */ | |
d542ed82 | 487 | static void mixdev_close_devices(void) |
1da177e4 | 488 | { |
9657d75c | 489 | struct mousedev *mousedev; |
d542ed82 | 490 | |
9657d75c DT |
491 | if (--mousedev_mix->open) |
492 | return; | |
493 | ||
494 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { | |
d542ed82 DT |
495 | if (mousedev->mixdev_open) { |
496 | mousedev->mixdev_open = 0; | |
464b2415 | 497 | mousedev_close_device(mousedev); |
1da177e4 LT |
498 | } |
499 | } | |
1da177e4 LT |
500 | } |
501 | ||
464b2415 DT |
502 | |
503 | static void mousedev_attach_client(struct mousedev *mousedev, | |
504 | struct mousedev_client *client) | |
505 | { | |
506 | spin_lock(&mousedev->client_lock); | |
507 | list_add_tail_rcu(&client->node, &mousedev->client_list); | |
508 | spin_unlock(&mousedev->client_lock); | |
82ba56c2 | 509 | synchronize_rcu(); |
464b2415 DT |
510 | } |
511 | ||
512 | static void mousedev_detach_client(struct mousedev *mousedev, | |
513 | struct mousedev_client *client) | |
514 | { | |
515 | spin_lock(&mousedev->client_lock); | |
516 | list_del_rcu(&client->node); | |
517 | spin_unlock(&mousedev->client_lock); | |
82ba56c2 | 518 | synchronize_rcu(); |
464b2415 DT |
519 | } |
520 | ||
d0ffb9be | 521 | static int mousedev_release(struct inode *inode, struct file *file) |
1da177e4 | 522 | { |
d0ffb9be DT |
523 | struct mousedev_client *client = file->private_data; |
524 | struct mousedev *mousedev = client->mousedev; | |
1da177e4 | 525 | |
464b2415 | 526 | mousedev_detach_client(mousedev, client); |
d0ffb9be | 527 | kfree(client); |
1da177e4 | 528 | |
464b2415 | 529 | mousedev_close_device(mousedev); |
9657d75c | 530 | put_device(&mousedev->dev); |
1da177e4 | 531 | |
1da177e4 LT |
532 | return 0; |
533 | } | |
534 | ||
d0ffb9be | 535 | static int mousedev_open(struct inode *inode, struct file *file) |
1da177e4 | 536 | { |
d0ffb9be | 537 | struct mousedev_client *client; |
1da177e4 | 538 | struct mousedev *mousedev; |
d542ed82 | 539 | int error; |
1da177e4 LT |
540 | int i; |
541 | ||
542 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
543 | if (imajor(inode) == MISC_MAJOR) | |
544 | i = MOUSEDEV_MIX; | |
545 | else | |
546 | #endif | |
547 | i = iminor(inode) - MOUSEDEV_MINOR_BASE; | |
548 | ||
d0ffb9be | 549 | if (i >= MOUSEDEV_MINORS) |
1da177e4 LT |
550 | return -ENODEV; |
551 | ||
464b2415 | 552 | error = mutex_lock_interruptible(&mousedev_table_mutex); |
f9c8154f | 553 | if (error) { |
464b2415 | 554 | return error; |
f9c8154f | 555 | } |
d0ffb9be | 556 | mousedev = mousedev_table[i]; |
464b2415 DT |
557 | if (mousedev) |
558 | get_device(&mousedev->dev); | |
559 | mutex_unlock(&mousedev_table_mutex); | |
560 | ||
f9c8154f | 561 | if (!mousedev) { |
1da177e4 | 562 | return -ENODEV; |
f9c8154f | 563 | } |
1da177e4 | 564 | |
d0ffb9be | 565 | client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL); |
9657d75c DT |
566 | if (!client) { |
567 | error = -ENOMEM; | |
568 | goto err_put_mousedev; | |
569 | } | |
1da177e4 | 570 | |
d0ffb9be DT |
571 | spin_lock_init(&client->packet_lock); |
572 | client->pos_x = xres / 2; | |
573 | client->pos_y = yres / 2; | |
574 | client->mousedev = mousedev; | |
464b2415 | 575 | mousedev_attach_client(mousedev, client); |
1da177e4 | 576 | |
464b2415 DT |
577 | error = mousedev_open_device(mousedev); |
578 | if (error) | |
579 | goto err_free_client; | |
1da177e4 | 580 | |
d0ffb9be | 581 | file->private_data = client; |
1da177e4 | 582 | return 0; |
9657d75c DT |
583 | |
584 | err_free_client: | |
464b2415 | 585 | mousedev_detach_client(mousedev, client); |
9657d75c DT |
586 | kfree(client); |
587 | err_put_mousedev: | |
588 | put_device(&mousedev->dev); | |
589 | return error; | |
1da177e4 LT |
590 | } |
591 | ||
592 | static inline int mousedev_limit_delta(int delta, int limit) | |
593 | { | |
594 | return delta > limit ? limit : (delta < -limit ? -limit : delta); | |
595 | } | |
596 | ||
464b2415 DT |
597 | static void mousedev_packet(struct mousedev_client *client, |
598 | signed char *ps2_data) | |
1da177e4 | 599 | { |
464b2415 | 600 | struct mousedev_motion *p = &client->packets[client->tail]; |
1da177e4 | 601 | |
464b2415 DT |
602 | ps2_data[0] = 0x08 | |
603 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07); | |
1da177e4 LT |
604 | ps2_data[1] = mousedev_limit_delta(p->dx, 127); |
605 | ps2_data[2] = mousedev_limit_delta(p->dy, 127); | |
606 | p->dx -= ps2_data[1]; | |
607 | p->dy -= ps2_data[2]; | |
608 | ||
d0ffb9be | 609 | switch (client->mode) { |
464b2415 DT |
610 | case MOUSEDEV_EMUL_EXPS: |
611 | ps2_data[3] = mousedev_limit_delta(p->dz, 7); | |
612 | p->dz -= ps2_data[3]; | |
613 | ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1); | |
614 | client->bufsiz = 4; | |
615 | break; | |
616 | ||
617 | case MOUSEDEV_EMUL_IMPS: | |
618 | ps2_data[0] |= | |
619 | ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); | |
620 | ps2_data[3] = mousedev_limit_delta(p->dz, 127); | |
621 | p->dz -= ps2_data[3]; | |
622 | client->bufsiz = 4; | |
623 | break; | |
624 | ||
625 | case MOUSEDEV_EMUL_PS2: | |
626 | default: | |
627 | ps2_data[0] |= | |
628 | ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); | |
629 | p->dz = 0; | |
630 | client->bufsiz = 3; | |
631 | break; | |
1da177e4 LT |
632 | } |
633 | ||
634 | if (!p->dx && !p->dy && !p->dz) { | |
d0ffb9be DT |
635 | if (client->tail == client->head) { |
636 | client->ready = 0; | |
637 | client->last_buttons = p->buttons; | |
c1e4c8d3 | 638 | } else |
d0ffb9be | 639 | client->tail = (client->tail + 1) % PACKET_QUEUE_LEN; |
1da177e4 | 640 | } |
1da177e4 LT |
641 | } |
642 | ||
464b2415 DT |
643 | static void mousedev_generate_response(struct mousedev_client *client, |
644 | int command) | |
645 | { | |
646 | client->ps2[0] = 0xfa; /* ACK */ | |
1da177e4 | 647 | |
464b2415 DT |
648 | switch (command) { |
649 | ||
650 | case 0xeb: /* Poll */ | |
651 | mousedev_packet(client, &client->ps2[1]); | |
652 | client->bufsiz++; /* account for leading ACK */ | |
653 | break; | |
654 | ||
655 | case 0xf2: /* Get ID */ | |
656 | switch (client->mode) { | |
657 | case MOUSEDEV_EMUL_PS2: | |
658 | client->ps2[1] = 0; | |
659 | break; | |
660 | case MOUSEDEV_EMUL_IMPS: | |
661 | client->ps2[1] = 3; | |
662 | break; | |
663 | case MOUSEDEV_EMUL_EXPS: | |
664 | client->ps2[1] = 4; | |
665 | break; | |
666 | } | |
667 | client->bufsiz = 2; | |
668 | break; | |
669 | ||
670 | case 0xe9: /* Get info */ | |
671 | client->ps2[1] = 0x60; client->ps2[2] = 3; client->ps2[3] = 200; | |
672 | client->bufsiz = 4; | |
673 | break; | |
674 | ||
675 | case 0xff: /* Reset */ | |
676 | client->impsseq = client->imexseq = 0; | |
677 | client->mode = MOUSEDEV_EMUL_PS2; | |
678 | client->ps2[1] = 0xaa; client->ps2[2] = 0x00; | |
679 | client->bufsiz = 3; | |
680 | break; | |
681 | ||
682 | default: | |
683 | client->bufsiz = 1; | |
684 | break; | |
685 | } | |
686 | client->buffer = client->bufsiz; | |
687 | } | |
688 | ||
689 | static ssize_t mousedev_write(struct file *file, const char __user *buffer, | |
690 | size_t count, loff_t *ppos) | |
1da177e4 | 691 | { |
d0ffb9be | 692 | struct mousedev_client *client = file->private_data; |
1da177e4 LT |
693 | unsigned char c; |
694 | unsigned int i; | |
695 | ||
696 | for (i = 0; i < count; i++) { | |
697 | ||
698 | if (get_user(c, buffer + i)) | |
699 | return -EFAULT; | |
700 | ||
464b2415 DT |
701 | spin_lock_irq(&client->packet_lock); |
702 | ||
d0ffb9be DT |
703 | if (c == mousedev_imex_seq[client->imexseq]) { |
704 | if (++client->imexseq == MOUSEDEV_SEQ_LEN) { | |
705 | client->imexseq = 0; | |
706 | client->mode = MOUSEDEV_EMUL_EXPS; | |
1da177e4 | 707 | } |
1e0afb28 | 708 | } else |
d0ffb9be | 709 | client->imexseq = 0; |
1da177e4 | 710 | |
d0ffb9be DT |
711 | if (c == mousedev_imps_seq[client->impsseq]) { |
712 | if (++client->impsseq == MOUSEDEV_SEQ_LEN) { | |
713 | client->impsseq = 0; | |
714 | client->mode = MOUSEDEV_EMUL_IMPS; | |
1da177e4 | 715 | } |
1e0afb28 | 716 | } else |
d0ffb9be | 717 | client->impsseq = 0; |
1da177e4 | 718 | |
464b2415 | 719 | mousedev_generate_response(client, c); |
1da177e4 | 720 | |
464b2415 | 721 | spin_unlock_irq(&client->packet_lock); |
1da177e4 LT |
722 | } |
723 | ||
d0ffb9be | 724 | kill_fasync(&client->fasync, SIGIO, POLL_IN); |
d0ffb9be | 725 | wake_up_interruptible(&client->mousedev->wait); |
1da177e4 LT |
726 | |
727 | return count; | |
728 | } | |
729 | ||
464b2415 DT |
730 | static ssize_t mousedev_read(struct file *file, char __user *buffer, |
731 | size_t count, loff_t *ppos) | |
1da177e4 | 732 | { |
d0ffb9be | 733 | struct mousedev_client *client = file->private_data; |
464b2415 DT |
734 | struct mousedev *mousedev = client->mousedev; |
735 | signed char data[sizeof(client->ps2)]; | |
1da177e4 LT |
736 | int retval = 0; |
737 | ||
464b2415 DT |
738 | if (!client->ready && !client->buffer && mousedev->exist && |
739 | (file->f_flags & O_NONBLOCK)) | |
1da177e4 LT |
740 | return -EAGAIN; |
741 | ||
464b2415 DT |
742 | retval = wait_event_interruptible(mousedev->wait, |
743 | !mousedev->exist || client->ready || client->buffer); | |
1da177e4 LT |
744 | if (retval) |
745 | return retval; | |
746 | ||
464b2415 | 747 | if (!mousedev->exist) |
1da177e4 LT |
748 | return -ENODEV; |
749 | ||
464b2415 DT |
750 | spin_lock_irq(&client->packet_lock); |
751 | ||
d0ffb9be DT |
752 | if (!client->buffer && client->ready) { |
753 | mousedev_packet(client, client->ps2); | |
754 | client->buffer = client->bufsiz; | |
1da177e4 LT |
755 | } |
756 | ||
d0ffb9be DT |
757 | if (count > client->buffer) |
758 | count = client->buffer; | |
1da177e4 | 759 | |
464b2415 | 760 | memcpy(data, client->ps2 + client->bufsiz - client->buffer, count); |
d0ffb9be | 761 | client->buffer -= count; |
1da177e4 | 762 | |
464b2415 DT |
763 | spin_unlock_irq(&client->packet_lock); |
764 | ||
765 | if (copy_to_user(buffer, data, count)) | |
1da177e4 LT |
766 | return -EFAULT; |
767 | ||
768 | return count; | |
769 | } | |
770 | ||
771 | /* No kernel lock - fine */ | |
772 | static unsigned int mousedev_poll(struct file *file, poll_table *wait) | |
773 | { | |
d0ffb9be DT |
774 | struct mousedev_client *client = file->private_data; |
775 | struct mousedev *mousedev = client->mousedev; | |
4d4bf995 | 776 | unsigned int mask; |
1e0afb28 | 777 | |
d0ffb9be | 778 | poll_wait(file, &mousedev->wait, wait); |
4d4bf995 JM |
779 | |
780 | mask = mousedev->exist ? POLLOUT | POLLWRNORM : POLLHUP | POLLERR; | |
781 | if (client->ready || client->buffer) | |
782 | mask |= POLLIN | POLLRDNORM; | |
783 | ||
784 | return mask; | |
1da177e4 LT |
785 | } |
786 | ||
66e66118 | 787 | static const struct file_operations mousedev_fops = { |
1da177e4 LT |
788 | .owner = THIS_MODULE, |
789 | .read = mousedev_read, | |
790 | .write = mousedev_write, | |
791 | .poll = mousedev_poll, | |
792 | .open = mousedev_open, | |
793 | .release = mousedev_release, | |
794 | .fasync = mousedev_fasync, | |
795 | }; | |
796 | ||
464b2415 DT |
797 | static int mousedev_install_chrdev(struct mousedev *mousedev) |
798 | { | |
799 | mousedev_table[mousedev->minor] = mousedev; | |
800 | return 0; | |
801 | } | |
802 | ||
803 | static void mousedev_remove_chrdev(struct mousedev *mousedev) | |
804 | { | |
805 | mutex_lock(&mousedev_table_mutex); | |
806 | mousedev_table[mousedev->minor] = NULL; | |
807 | mutex_unlock(&mousedev_table_mutex); | |
808 | } | |
809 | ||
810 | /* | |
811 | * Mark device non-existent. This disables writes, ioctls and | |
812 | * prevents new users from opening the device. Already posted | |
813 | * blocking reads will stay, however new ones will fail. | |
814 | */ | |
815 | static void mousedev_mark_dead(struct mousedev *mousedev) | |
816 | { | |
817 | mutex_lock(&mousedev->mutex); | |
20da92de | 818 | mousedev->exist = false; |
464b2415 DT |
819 | mutex_unlock(&mousedev->mutex); |
820 | } | |
821 | ||
822 | /* | |
823 | * Wake up users waiting for IO so they can disconnect from | |
824 | * dead device. | |
825 | */ | |
826 | static void mousedev_hangup(struct mousedev *mousedev) | |
827 | { | |
828 | struct mousedev_client *client; | |
829 | ||
830 | spin_lock(&mousedev->client_lock); | |
831 | list_for_each_entry(client, &mousedev->client_list, node) | |
832 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
833 | spin_unlock(&mousedev->client_lock); | |
834 | ||
835 | wake_up_interruptible(&mousedev->wait); | |
836 | } | |
837 | ||
838 | static void mousedev_cleanup(struct mousedev *mousedev) | |
839 | { | |
840 | struct input_handle *handle = &mousedev->handle; | |
841 | ||
842 | mousedev_mark_dead(mousedev); | |
843 | mousedev_hangup(mousedev); | |
844 | mousedev_remove_chrdev(mousedev); | |
845 | ||
846 | /* mousedev is marked dead so no one else accesses mousedev->open */ | |
847 | if (mousedev->open) | |
848 | input_close_device(handle); | |
849 | } | |
850 | ||
9657d75c DT |
851 | static struct mousedev *mousedev_create(struct input_dev *dev, |
852 | struct input_handler *handler, | |
853 | int minor) | |
1da177e4 LT |
854 | { |
855 | struct mousedev *mousedev; | |
5b2a0826 | 856 | int error; |
1da177e4 | 857 | |
5b2a0826 | 858 | mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL); |
9657d75c DT |
859 | if (!mousedev) { |
860 | error = -ENOMEM; | |
861 | goto err_out; | |
862 | } | |
1da177e4 | 863 | |
d0ffb9be | 864 | INIT_LIST_HEAD(&mousedev->client_list); |
5b2a0826 | 865 | INIT_LIST_HEAD(&mousedev->mixdev_node); |
464b2415 DT |
866 | spin_lock_init(&mousedev->client_lock); |
867 | mutex_init(&mousedev->mutex); | |
868 | lockdep_set_subclass(&mousedev->mutex, | |
869 | minor == MOUSEDEV_MIX ? MOUSEDEV_MIX : 0); | |
1da177e4 LT |
870 | init_waitqueue_head(&mousedev->wait); |
871 | ||
9657d75c | 872 | if (minor == MOUSEDEV_MIX) |
3d5cb60e | 873 | dev_set_name(&mousedev->dev, "mice"); |
9657d75c | 874 | else |
3d5cb60e | 875 | dev_set_name(&mousedev->dev, "mouse%d", minor); |
9657d75c | 876 | |
1da177e4 | 877 | mousedev->minor = minor; |
20da92de | 878 | mousedev->exist = true; |
a7097ff8 | 879 | mousedev->handle.dev = input_get_device(dev); |
3d5cb60e | 880 | mousedev->handle.name = dev_name(&mousedev->dev); |
1da177e4 LT |
881 | mousedev->handle.handler = handler; |
882 | mousedev->handle.private = mousedev; | |
1da177e4 | 883 | |
9657d75c DT |
884 | mousedev->dev.class = &input_class; |
885 | if (dev) | |
886 | mousedev->dev.parent = &dev->dev; | |
887 | mousedev->dev.devt = MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor); | |
888 | mousedev->dev.release = mousedev_free; | |
889 | device_initialize(&mousedev->dev); | |
1da177e4 | 890 | |
464b2415 DT |
891 | if (minor != MOUSEDEV_MIX) { |
892 | error = input_register_handle(&mousedev->handle); | |
893 | if (error) | |
894 | goto err_free_mousedev; | |
895 | } | |
896 | ||
897 | error = mousedev_install_chrdev(mousedev); | |
898 | if (error) | |
899 | goto err_unregister_handle; | |
5b2a0826 | 900 | |
9657d75c DT |
901 | error = device_add(&mousedev->dev); |
902 | if (error) | |
464b2415 | 903 | goto err_cleanup_mousedev; |
9657d75c DT |
904 | |
905 | return mousedev; | |
906 | ||
464b2415 DT |
907 | err_cleanup_mousedev: |
908 | mousedev_cleanup(mousedev); | |
909 | err_unregister_handle: | |
910 | if (minor != MOUSEDEV_MIX) | |
911 | input_unregister_handle(&mousedev->handle); | |
9657d75c DT |
912 | err_free_mousedev: |
913 | put_device(&mousedev->dev); | |
914 | err_out: | |
915 | return ERR_PTR(error); | |
916 | } | |
917 | ||
918 | static void mousedev_destroy(struct mousedev *mousedev) | |
919 | { | |
9657d75c | 920 | device_del(&mousedev->dev); |
464b2415 DT |
921 | mousedev_cleanup(mousedev); |
922 | if (mousedev->minor != MOUSEDEV_MIX) | |
923 | input_unregister_handle(&mousedev->handle); | |
924 | put_device(&mousedev->dev); | |
925 | } | |
9657d75c | 926 | |
464b2415 DT |
927 | static int mixdev_add_device(struct mousedev *mousedev) |
928 | { | |
929 | int retval; | |
930 | ||
931 | retval = mutex_lock_interruptible(&mousedev_mix->mutex); | |
932 | if (retval) | |
933 | return retval; | |
934 | ||
935 | if (mousedev_mix->open) { | |
936 | retval = mousedev_open_device(mousedev); | |
937 | if (retval) | |
938 | goto out; | |
939 | ||
940 | mousedev->mixdev_open = 1; | |
5b2a0826 | 941 | } |
c9bcd582 | 942 | |
464b2415 DT |
943 | get_device(&mousedev->dev); |
944 | list_add_tail(&mousedev->mixdev_node, &mousedev_mix_list); | |
945 | ||
946 | out: | |
947 | mutex_unlock(&mousedev_mix->mutex); | |
948 | return retval; | |
949 | } | |
950 | ||
951 | static void mixdev_remove_device(struct mousedev *mousedev) | |
952 | { | |
953 | mutex_lock(&mousedev_mix->mutex); | |
954 | ||
955 | if (mousedev->mixdev_open) { | |
956 | mousedev->mixdev_open = 0; | |
957 | mousedev_close_device(mousedev); | |
958 | } | |
959 | ||
960 | list_del_init(&mousedev->mixdev_node); | |
961 | mutex_unlock(&mousedev_mix->mutex); | |
962 | ||
9657d75c DT |
963 | put_device(&mousedev->dev); |
964 | } | |
965 | ||
464b2415 DT |
966 | static int mousedev_connect(struct input_handler *handler, |
967 | struct input_dev *dev, | |
9657d75c DT |
968 | const struct input_device_id *id) |
969 | { | |
970 | struct mousedev *mousedev; | |
971 | int minor; | |
972 | int error; | |
973 | ||
464b2415 DT |
974 | for (minor = 0; minor < MOUSEDEV_MINORS; minor++) |
975 | if (!mousedev_table[minor]) | |
976 | break; | |
977 | ||
9657d75c DT |
978 | if (minor == MOUSEDEV_MINORS) { |
979 | printk(KERN_ERR "mousedev: no more free mousedev devices\n"); | |
980 | return -ENFILE; | |
981 | } | |
982 | ||
983 | mousedev = mousedev_create(dev, handler, minor); | |
984 | if (IS_ERR(mousedev)) | |
985 | return PTR_ERR(mousedev); | |
5b2a0826 | 986 | |
d542ed82 | 987 | error = mixdev_add_device(mousedev); |
464b2415 DT |
988 | if (error) { |
989 | mousedev_destroy(mousedev); | |
990 | return error; | |
991 | } | |
1da177e4 | 992 | |
5b2a0826 | 993 | return 0; |
1da177e4 LT |
994 | } |
995 | ||
996 | static void mousedev_disconnect(struct input_handle *handle) | |
997 | { | |
998 | struct mousedev *mousedev = handle->private; | |
1da177e4 | 999 | |
d542ed82 | 1000 | mixdev_remove_device(mousedev); |
9657d75c | 1001 | mousedev_destroy(mousedev); |
1da177e4 LT |
1002 | } |
1003 | ||
66e66118 | 1004 | static const struct input_device_id mousedev_ids[] = { |
1da177e4 | 1005 | { |
464b2415 DT |
1006 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1007 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1008 | INPUT_DEVICE_ID_MATCH_RELBIT, | |
7b19ada2 JS |
1009 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) }, |
1010 | .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) }, | |
1011 | .relbit = { BIT_MASK(REL_X) | BIT_MASK(REL_Y) }, | |
464b2415 DT |
1012 | }, /* A mouse like device, at least one button, |
1013 | two relative axes */ | |
1da177e4 | 1014 | { |
464b2415 DT |
1015 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1016 | INPUT_DEVICE_ID_MATCH_RELBIT, | |
7b19ada2 JS |
1017 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) }, |
1018 | .relbit = { BIT_MASK(REL_WHEEL) }, | |
1da177e4 LT |
1019 | }, /* A separate scrollwheel */ |
1020 | { | |
464b2415 DT |
1021 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1022 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1023 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
1024 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
1025 | .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) }, | |
1026 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) }, | |
464b2415 DT |
1027 | }, /* A tablet like device, at least touch detection, |
1028 | two absolute axes */ | |
1da177e4 | 1029 | { |
464b2415 DT |
1030 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1031 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1032 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
1033 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
1034 | .keybit = { [BIT_WORD(BTN_TOOL_FINGER)] = | |
1035 | BIT_MASK(BTN_TOOL_FINGER) }, | |
1036 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) | | |
1037 | BIT_MASK(ABS_PRESSURE) | | |
1038 | BIT_MASK(ABS_TOOL_WIDTH) }, | |
1da177e4 | 1039 | }, /* A touchpad */ |
6724f934 MP |
1040 | { |
1041 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
1042 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1043 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
d182c10c | 1044 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
6724f934 MP |
1045 | .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) }, |
1046 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) }, | |
1047 | }, /* Mouse-like device with absolute X and Y but ordinary | |
1048 | clicks, like hp ILO2 High Performance mouse */ | |
1da177e4 | 1049 | |
d0ffb9be | 1050 | { }, /* Terminating entry */ |
1da177e4 LT |
1051 | }; |
1052 | ||
1053 | MODULE_DEVICE_TABLE(input, mousedev_ids); | |
1054 | ||
1055 | static struct input_handler mousedev_handler = { | |
1056 | .event = mousedev_event, | |
1057 | .connect = mousedev_connect, | |
1058 | .disconnect = mousedev_disconnect, | |
1059 | .fops = &mousedev_fops, | |
1060 | .minor = MOUSEDEV_MINOR_BASE, | |
1061 | .name = "mousedev", | |
1062 | .id_table = mousedev_ids, | |
1063 | }; | |
1064 | ||
1065 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
1066 | static struct miscdevice psaux_mouse = { | |
1067 | PSMOUSE_MINOR, "psaux", &mousedev_fops | |
1068 | }; | |
1069 | static int psaux_registered; | |
1070 | #endif | |
1071 | ||
1072 | static int __init mousedev_init(void) | |
1073 | { | |
4263cf0f DT |
1074 | int error; |
1075 | ||
9657d75c DT |
1076 | mousedev_mix = mousedev_create(NULL, &mousedev_handler, MOUSEDEV_MIX); |
1077 | if (IS_ERR(mousedev_mix)) | |
1078 | return PTR_ERR(mousedev_mix); | |
1079 | ||
4263cf0f | 1080 | error = input_register_handler(&mousedev_handler); |
9657d75c DT |
1081 | if (error) { |
1082 | mousedev_destroy(mousedev_mix); | |
4263cf0f | 1083 | return error; |
4263cf0f | 1084 | } |
1da177e4 LT |
1085 | |
1086 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
4263cf0f DT |
1087 | error = misc_register(&psaux_mouse); |
1088 | if (error) | |
1089 | printk(KERN_WARNING "mice: could not register psaux device, " | |
1090 | "error: %d\n", error); | |
1091 | else | |
1092 | psaux_registered = 1; | |
1da177e4 LT |
1093 | #endif |
1094 | ||
1095 | printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n"); | |
1096 | ||
1097 | return 0; | |
1098 | } | |
1099 | ||
1100 | static void __exit mousedev_exit(void) | |
1101 | { | |
1102 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
1103 | if (psaux_registered) | |
1104 | misc_deregister(&psaux_mouse); | |
1105 | #endif | |
1da177e4 | 1106 | input_unregister_handler(&mousedev_handler); |
9657d75c | 1107 | mousedev_destroy(mousedev_mix); |
1da177e4 LT |
1108 | } |
1109 | ||
1110 | module_init(mousedev_init); | |
1111 | module_exit(mousedev_exit); |