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