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