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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 | 17 | #include <linux/slab.h> |
f9c8154f | 18 | #include <linux/smp_lock.h> |
1da177e4 LT |
19 | #include <linux/poll.h> |
20 | #include <linux/module.h> | |
1da177e4 LT |
21 | #include <linux/init.h> |
22 | #include <linux/input.h> | |
1da177e4 LT |
23 | #include <linux/random.h> |
24 | #include <linux/major.h> | |
25 | #include <linux/device.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 { | |
61 | int exist; | |
62 | int open; | |
63 | int minor; | |
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 | { | |
d0ffb9be | 406 | struct mousedev_client *client = file->private_data; |
1e0afb28 | 407 | |
60aa4924 | 408 | return fasync_helper(fd, file, on, &client->fasync); |
1da177e4 LT |
409 | } |
410 | ||
9657d75c | 411 | static void mousedev_free(struct device *dev) |
1da177e4 | 412 | { |
9657d75c DT |
413 | struct mousedev *mousedev = container_of(dev, struct mousedev, dev); |
414 | ||
a7097ff8 | 415 | input_put_device(mousedev->handle.dev); |
1da177e4 LT |
416 | kfree(mousedev); |
417 | } | |
418 | ||
464b2415 | 419 | static int mousedev_open_device(struct mousedev *mousedev) |
1da177e4 | 420 | { |
464b2415 | 421 | int retval; |
1da177e4 | 422 | |
464b2415 DT |
423 | retval = mutex_lock_interruptible(&mousedev->mutex); |
424 | if (retval) | |
425 | return retval; | |
d542ed82 | 426 | |
464b2415 DT |
427 | if (mousedev->minor == MOUSEDEV_MIX) |
428 | mixdev_open_devices(); | |
429 | else if (!mousedev->exist) | |
430 | retval = -ENODEV; | |
06445014 | 431 | else if (!mousedev->open++) { |
464b2415 | 432 | retval = input_open_device(&mousedev->handle); |
06445014 ON |
433 | if (retval) |
434 | mousedev->open--; | |
435 | } | |
d542ed82 | 436 | |
464b2415 DT |
437 | mutex_unlock(&mousedev->mutex); |
438 | return retval; | |
d542ed82 DT |
439 | } |
440 | ||
464b2415 | 441 | static void mousedev_close_device(struct mousedev *mousedev) |
d542ed82 | 442 | { |
464b2415 | 443 | mutex_lock(&mousedev->mutex); |
d542ed82 | 444 | |
464b2415 DT |
445 | if (mousedev->minor == MOUSEDEV_MIX) |
446 | mixdev_close_devices(); | |
447 | else if (mousedev->exist && !--mousedev->open) | |
448 | input_close_device(&mousedev->handle); | |
449 | ||
450 | mutex_unlock(&mousedev->mutex); | |
d542ed82 DT |
451 | } |
452 | ||
464b2415 DT |
453 | /* |
454 | * Open all available devices so they can all be multiplexed in one. | |
455 | * stream. Note that this function is called with mousedev_mix->mutex | |
456 | * held. | |
457 | */ | |
d542ed82 DT |
458 | static void mixdev_open_devices(void) |
459 | { | |
460 | struct mousedev *mousedev; | |
461 | ||
9657d75c DT |
462 | if (mousedev_mix->open++) |
463 | return; | |
464 | ||
d542ed82 | 465 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { |
9657d75c | 466 | if (!mousedev->mixdev_open) { |
464b2415 DT |
467 | if (mousedev_open_device(mousedev)) |
468 | continue; | |
d542ed82 | 469 | |
9657d75c | 470 | mousedev->mixdev_open = 1; |
1da177e4 LT |
471 | } |
472 | } | |
1da177e4 LT |
473 | } |
474 | ||
464b2415 DT |
475 | /* |
476 | * Close all devices that were opened as part of multiplexed | |
477 | * device. Note that this function is called with mousedev_mix->mutex | |
478 | * held. | |
479 | */ | |
d542ed82 | 480 | static void mixdev_close_devices(void) |
1da177e4 | 481 | { |
9657d75c | 482 | struct mousedev *mousedev; |
d542ed82 | 483 | |
9657d75c DT |
484 | if (--mousedev_mix->open) |
485 | return; | |
486 | ||
487 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { | |
d542ed82 DT |
488 | if (mousedev->mixdev_open) { |
489 | mousedev->mixdev_open = 0; | |
464b2415 | 490 | mousedev_close_device(mousedev); |
1da177e4 LT |
491 | } |
492 | } | |
1da177e4 LT |
493 | } |
494 | ||
464b2415 DT |
495 | |
496 | static void mousedev_attach_client(struct mousedev *mousedev, | |
497 | struct mousedev_client *client) | |
498 | { | |
499 | spin_lock(&mousedev->client_lock); | |
500 | list_add_tail_rcu(&client->node, &mousedev->client_list); | |
501 | spin_unlock(&mousedev->client_lock); | |
82ba56c2 | 502 | synchronize_rcu(); |
464b2415 DT |
503 | } |
504 | ||
505 | static void mousedev_detach_client(struct mousedev *mousedev, | |
506 | struct mousedev_client *client) | |
507 | { | |
508 | spin_lock(&mousedev->client_lock); | |
509 | list_del_rcu(&client->node); | |
510 | spin_unlock(&mousedev->client_lock); | |
82ba56c2 | 511 | synchronize_rcu(); |
464b2415 DT |
512 | } |
513 | ||
d0ffb9be | 514 | static int mousedev_release(struct inode *inode, struct file *file) |
1da177e4 | 515 | { |
d0ffb9be DT |
516 | struct mousedev_client *client = file->private_data; |
517 | struct mousedev *mousedev = client->mousedev; | |
1da177e4 | 518 | |
464b2415 | 519 | mousedev_detach_client(mousedev, client); |
d0ffb9be | 520 | kfree(client); |
1da177e4 | 521 | |
464b2415 | 522 | mousedev_close_device(mousedev); |
9657d75c | 523 | put_device(&mousedev->dev); |
1da177e4 | 524 | |
1da177e4 LT |
525 | return 0; |
526 | } | |
527 | ||
d0ffb9be | 528 | static int mousedev_open(struct inode *inode, struct file *file) |
1da177e4 | 529 | { |
d0ffb9be | 530 | struct mousedev_client *client; |
1da177e4 | 531 | struct mousedev *mousedev; |
d542ed82 | 532 | int error; |
1da177e4 LT |
533 | int i; |
534 | ||
535 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
536 | if (imajor(inode) == MISC_MAJOR) | |
537 | i = MOUSEDEV_MIX; | |
538 | else | |
539 | #endif | |
540 | i = iminor(inode) - MOUSEDEV_MINOR_BASE; | |
541 | ||
d0ffb9be | 542 | if (i >= MOUSEDEV_MINORS) |
1da177e4 LT |
543 | return -ENODEV; |
544 | ||
f9c8154f | 545 | lock_kernel(); |
464b2415 | 546 | error = mutex_lock_interruptible(&mousedev_table_mutex); |
f9c8154f AB |
547 | if (error) { |
548 | unlock_kernel(); | |
464b2415 | 549 | return error; |
f9c8154f | 550 | } |
d0ffb9be | 551 | mousedev = mousedev_table[i]; |
464b2415 DT |
552 | if (mousedev) |
553 | get_device(&mousedev->dev); | |
554 | mutex_unlock(&mousedev_table_mutex); | |
555 | ||
f9c8154f AB |
556 | if (!mousedev) { |
557 | unlock_kernel(); | |
1da177e4 | 558 | return -ENODEV; |
f9c8154f | 559 | } |
1da177e4 | 560 | |
d0ffb9be | 561 | client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL); |
9657d75c DT |
562 | if (!client) { |
563 | error = -ENOMEM; | |
564 | goto err_put_mousedev; | |
565 | } | |
1da177e4 | 566 | |
d0ffb9be DT |
567 | spin_lock_init(&client->packet_lock); |
568 | client->pos_x = xres / 2; | |
569 | client->pos_y = yres / 2; | |
570 | client->mousedev = mousedev; | |
464b2415 | 571 | mousedev_attach_client(mousedev, client); |
1da177e4 | 572 | |
464b2415 DT |
573 | error = mousedev_open_device(mousedev); |
574 | if (error) | |
575 | goto err_free_client; | |
1da177e4 | 576 | |
d0ffb9be | 577 | file->private_data = client; |
f9c8154f | 578 | unlock_kernel(); |
1da177e4 | 579 | return 0; |
9657d75c DT |
580 | |
581 | err_free_client: | |
464b2415 | 582 | mousedev_detach_client(mousedev, client); |
9657d75c DT |
583 | kfree(client); |
584 | err_put_mousedev: | |
585 | put_device(&mousedev->dev); | |
f9c8154f | 586 | unlock_kernel(); |
9657d75c | 587 | return error; |
1da177e4 LT |
588 | } |
589 | ||
590 | static inline int mousedev_limit_delta(int delta, int limit) | |
591 | { | |
592 | return delta > limit ? limit : (delta < -limit ? -limit : delta); | |
593 | } | |
594 | ||
464b2415 DT |
595 | static void mousedev_packet(struct mousedev_client *client, |
596 | signed char *ps2_data) | |
1da177e4 | 597 | { |
464b2415 | 598 | struct mousedev_motion *p = &client->packets[client->tail]; |
1da177e4 | 599 | |
464b2415 DT |
600 | ps2_data[0] = 0x08 | |
601 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07); | |
1da177e4 LT |
602 | ps2_data[1] = mousedev_limit_delta(p->dx, 127); |
603 | ps2_data[2] = mousedev_limit_delta(p->dy, 127); | |
604 | p->dx -= ps2_data[1]; | |
605 | p->dy -= ps2_data[2]; | |
606 | ||
d0ffb9be | 607 | switch (client->mode) { |
464b2415 DT |
608 | case MOUSEDEV_EMUL_EXPS: |
609 | ps2_data[3] = mousedev_limit_delta(p->dz, 7); | |
610 | p->dz -= ps2_data[3]; | |
611 | ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1); | |
612 | client->bufsiz = 4; | |
613 | break; | |
614 | ||
615 | case MOUSEDEV_EMUL_IMPS: | |
616 | ps2_data[0] |= | |
617 | ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); | |
618 | ps2_data[3] = mousedev_limit_delta(p->dz, 127); | |
619 | p->dz -= ps2_data[3]; | |
620 | client->bufsiz = 4; | |
621 | break; | |
622 | ||
623 | case MOUSEDEV_EMUL_PS2: | |
624 | default: | |
625 | ps2_data[0] |= | |
626 | ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); | |
627 | p->dz = 0; | |
628 | client->bufsiz = 3; | |
629 | break; | |
1da177e4 LT |
630 | } |
631 | ||
632 | if (!p->dx && !p->dy && !p->dz) { | |
d0ffb9be DT |
633 | if (client->tail == client->head) { |
634 | client->ready = 0; | |
635 | client->last_buttons = p->buttons; | |
c1e4c8d3 | 636 | } else |
d0ffb9be | 637 | client->tail = (client->tail + 1) % PACKET_QUEUE_LEN; |
1da177e4 | 638 | } |
1da177e4 LT |
639 | } |
640 | ||
464b2415 DT |
641 | static void mousedev_generate_response(struct mousedev_client *client, |
642 | int command) | |
643 | { | |
644 | client->ps2[0] = 0xfa; /* ACK */ | |
1da177e4 | 645 | |
464b2415 DT |
646 | switch (command) { |
647 | ||
648 | case 0xeb: /* Poll */ | |
649 | mousedev_packet(client, &client->ps2[1]); | |
650 | client->bufsiz++; /* account for leading ACK */ | |
651 | break; | |
652 | ||
653 | case 0xf2: /* Get ID */ | |
654 | switch (client->mode) { | |
655 | case MOUSEDEV_EMUL_PS2: | |
656 | client->ps2[1] = 0; | |
657 | break; | |
658 | case MOUSEDEV_EMUL_IMPS: | |
659 | client->ps2[1] = 3; | |
660 | break; | |
661 | case MOUSEDEV_EMUL_EXPS: | |
662 | client->ps2[1] = 4; | |
663 | break; | |
664 | } | |
665 | client->bufsiz = 2; | |
666 | break; | |
667 | ||
668 | case 0xe9: /* Get info */ | |
669 | client->ps2[1] = 0x60; client->ps2[2] = 3; client->ps2[3] = 200; | |
670 | client->bufsiz = 4; | |
671 | break; | |
672 | ||
673 | case 0xff: /* Reset */ | |
674 | client->impsseq = client->imexseq = 0; | |
675 | client->mode = MOUSEDEV_EMUL_PS2; | |
676 | client->ps2[1] = 0xaa; client->ps2[2] = 0x00; | |
677 | client->bufsiz = 3; | |
678 | break; | |
679 | ||
680 | default: | |
681 | client->bufsiz = 1; | |
682 | break; | |
683 | } | |
684 | client->buffer = client->bufsiz; | |
685 | } | |
686 | ||
687 | static ssize_t mousedev_write(struct file *file, const char __user *buffer, | |
688 | size_t count, loff_t *ppos) | |
1da177e4 | 689 | { |
d0ffb9be | 690 | struct mousedev_client *client = file->private_data; |
1da177e4 LT |
691 | unsigned char c; |
692 | unsigned int i; | |
693 | ||
694 | for (i = 0; i < count; i++) { | |
695 | ||
696 | if (get_user(c, buffer + i)) | |
697 | return -EFAULT; | |
698 | ||
464b2415 DT |
699 | spin_lock_irq(&client->packet_lock); |
700 | ||
d0ffb9be DT |
701 | if (c == mousedev_imex_seq[client->imexseq]) { |
702 | if (++client->imexseq == MOUSEDEV_SEQ_LEN) { | |
703 | client->imexseq = 0; | |
704 | client->mode = MOUSEDEV_EMUL_EXPS; | |
1da177e4 | 705 | } |
1e0afb28 | 706 | } else |
d0ffb9be | 707 | client->imexseq = 0; |
1da177e4 | 708 | |
d0ffb9be DT |
709 | if (c == mousedev_imps_seq[client->impsseq]) { |
710 | if (++client->impsseq == MOUSEDEV_SEQ_LEN) { | |
711 | client->impsseq = 0; | |
712 | client->mode = MOUSEDEV_EMUL_IMPS; | |
1da177e4 | 713 | } |
1e0afb28 | 714 | } else |
d0ffb9be | 715 | client->impsseq = 0; |
1da177e4 | 716 | |
464b2415 | 717 | mousedev_generate_response(client, c); |
1da177e4 | 718 | |
464b2415 | 719 | spin_unlock_irq(&client->packet_lock); |
1da177e4 LT |
720 | } |
721 | ||
d0ffb9be | 722 | kill_fasync(&client->fasync, SIGIO, POLL_IN); |
d0ffb9be | 723 | wake_up_interruptible(&client->mousedev->wait); |
1da177e4 LT |
724 | |
725 | return count; | |
726 | } | |
727 | ||
464b2415 DT |
728 | static ssize_t mousedev_read(struct file *file, char __user *buffer, |
729 | size_t count, loff_t *ppos) | |
1da177e4 | 730 | { |
d0ffb9be | 731 | struct mousedev_client *client = file->private_data; |
464b2415 DT |
732 | struct mousedev *mousedev = client->mousedev; |
733 | signed char data[sizeof(client->ps2)]; | |
1da177e4 LT |
734 | int retval = 0; |
735 | ||
464b2415 DT |
736 | if (!client->ready && !client->buffer && mousedev->exist && |
737 | (file->f_flags & O_NONBLOCK)) | |
1da177e4 LT |
738 | return -EAGAIN; |
739 | ||
464b2415 DT |
740 | retval = wait_event_interruptible(mousedev->wait, |
741 | !mousedev->exist || client->ready || client->buffer); | |
1da177e4 LT |
742 | if (retval) |
743 | return retval; | |
744 | ||
464b2415 | 745 | if (!mousedev->exist) |
1da177e4 LT |
746 | return -ENODEV; |
747 | ||
464b2415 DT |
748 | spin_lock_irq(&client->packet_lock); |
749 | ||
d0ffb9be DT |
750 | if (!client->buffer && client->ready) { |
751 | mousedev_packet(client, client->ps2); | |
752 | client->buffer = client->bufsiz; | |
1da177e4 LT |
753 | } |
754 | ||
d0ffb9be DT |
755 | if (count > client->buffer) |
756 | count = client->buffer; | |
1da177e4 | 757 | |
464b2415 | 758 | memcpy(data, client->ps2 + client->bufsiz - client->buffer, count); |
d0ffb9be | 759 | client->buffer -= count; |
1da177e4 | 760 | |
464b2415 DT |
761 | spin_unlock_irq(&client->packet_lock); |
762 | ||
763 | if (copy_to_user(buffer, data, count)) | |
1da177e4 LT |
764 | return -EFAULT; |
765 | ||
766 | return count; | |
767 | } | |
768 | ||
769 | /* No kernel lock - fine */ | |
770 | static unsigned int mousedev_poll(struct file *file, poll_table *wait) | |
771 | { | |
d0ffb9be DT |
772 | struct mousedev_client *client = file->private_data; |
773 | struct mousedev *mousedev = client->mousedev; | |
1e0afb28 | 774 | |
d0ffb9be DT |
775 | poll_wait(file, &mousedev->wait, wait); |
776 | return ((client->ready || client->buffer) ? (POLLIN | POLLRDNORM) : 0) | | |
777 | (mousedev->exist ? 0 : (POLLHUP | POLLERR)); | |
1da177e4 LT |
778 | } |
779 | ||
66e66118 | 780 | static const struct file_operations mousedev_fops = { |
1da177e4 LT |
781 | .owner = THIS_MODULE, |
782 | .read = mousedev_read, | |
783 | .write = mousedev_write, | |
784 | .poll = mousedev_poll, | |
785 | .open = mousedev_open, | |
786 | .release = mousedev_release, | |
787 | .fasync = mousedev_fasync, | |
788 | }; | |
789 | ||
464b2415 DT |
790 | static int mousedev_install_chrdev(struct mousedev *mousedev) |
791 | { | |
792 | mousedev_table[mousedev->minor] = mousedev; | |
793 | return 0; | |
794 | } | |
795 | ||
796 | static void mousedev_remove_chrdev(struct mousedev *mousedev) | |
797 | { | |
798 | mutex_lock(&mousedev_table_mutex); | |
799 | mousedev_table[mousedev->minor] = NULL; | |
800 | mutex_unlock(&mousedev_table_mutex); | |
801 | } | |
802 | ||
803 | /* | |
804 | * Mark device non-existent. This disables writes, ioctls and | |
805 | * prevents new users from opening the device. Already posted | |
806 | * blocking reads will stay, however new ones will fail. | |
807 | */ | |
808 | static void mousedev_mark_dead(struct mousedev *mousedev) | |
809 | { | |
810 | mutex_lock(&mousedev->mutex); | |
811 | mousedev->exist = 0; | |
812 | mutex_unlock(&mousedev->mutex); | |
813 | } | |
814 | ||
815 | /* | |
816 | * Wake up users waiting for IO so they can disconnect from | |
817 | * dead device. | |
818 | */ | |
819 | static void mousedev_hangup(struct mousedev *mousedev) | |
820 | { | |
821 | struct mousedev_client *client; | |
822 | ||
823 | spin_lock(&mousedev->client_lock); | |
824 | list_for_each_entry(client, &mousedev->client_list, node) | |
825 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
826 | spin_unlock(&mousedev->client_lock); | |
827 | ||
828 | wake_up_interruptible(&mousedev->wait); | |
829 | } | |
830 | ||
831 | static void mousedev_cleanup(struct mousedev *mousedev) | |
832 | { | |
833 | struct input_handle *handle = &mousedev->handle; | |
834 | ||
835 | mousedev_mark_dead(mousedev); | |
836 | mousedev_hangup(mousedev); | |
837 | mousedev_remove_chrdev(mousedev); | |
838 | ||
839 | /* mousedev is marked dead so no one else accesses mousedev->open */ | |
840 | if (mousedev->open) | |
841 | input_close_device(handle); | |
842 | } | |
843 | ||
9657d75c DT |
844 | static struct mousedev *mousedev_create(struct input_dev *dev, |
845 | struct input_handler *handler, | |
846 | int minor) | |
1da177e4 LT |
847 | { |
848 | struct mousedev *mousedev; | |
5b2a0826 | 849 | int error; |
1da177e4 | 850 | |
5b2a0826 | 851 | mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL); |
9657d75c DT |
852 | if (!mousedev) { |
853 | error = -ENOMEM; | |
854 | goto err_out; | |
855 | } | |
1da177e4 | 856 | |
d0ffb9be | 857 | INIT_LIST_HEAD(&mousedev->client_list); |
5b2a0826 | 858 | INIT_LIST_HEAD(&mousedev->mixdev_node); |
464b2415 DT |
859 | spin_lock_init(&mousedev->client_lock); |
860 | mutex_init(&mousedev->mutex); | |
861 | lockdep_set_subclass(&mousedev->mutex, | |
862 | minor == MOUSEDEV_MIX ? MOUSEDEV_MIX : 0); | |
1da177e4 LT |
863 | init_waitqueue_head(&mousedev->wait); |
864 | ||
9657d75c | 865 | if (minor == MOUSEDEV_MIX) |
3d5cb60e | 866 | dev_set_name(&mousedev->dev, "mice"); |
9657d75c | 867 | else |
3d5cb60e | 868 | dev_set_name(&mousedev->dev, "mouse%d", minor); |
9657d75c | 869 | |
1da177e4 LT |
870 | mousedev->minor = minor; |
871 | mousedev->exist = 1; | |
a7097ff8 | 872 | mousedev->handle.dev = input_get_device(dev); |
3d5cb60e | 873 | mousedev->handle.name = dev_name(&mousedev->dev); |
1da177e4 LT |
874 | mousedev->handle.handler = handler; |
875 | mousedev->handle.private = mousedev; | |
1da177e4 | 876 | |
9657d75c DT |
877 | mousedev->dev.class = &input_class; |
878 | if (dev) | |
879 | mousedev->dev.parent = &dev->dev; | |
880 | mousedev->dev.devt = MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor); | |
881 | mousedev->dev.release = mousedev_free; | |
882 | device_initialize(&mousedev->dev); | |
1da177e4 | 883 | |
464b2415 DT |
884 | if (minor != MOUSEDEV_MIX) { |
885 | error = input_register_handle(&mousedev->handle); | |
886 | if (error) | |
887 | goto err_free_mousedev; | |
888 | } | |
889 | ||
890 | error = mousedev_install_chrdev(mousedev); | |
891 | if (error) | |
892 | goto err_unregister_handle; | |
5b2a0826 | 893 | |
9657d75c DT |
894 | error = device_add(&mousedev->dev); |
895 | if (error) | |
464b2415 | 896 | goto err_cleanup_mousedev; |
9657d75c DT |
897 | |
898 | return mousedev; | |
899 | ||
464b2415 DT |
900 | err_cleanup_mousedev: |
901 | mousedev_cleanup(mousedev); | |
902 | err_unregister_handle: | |
903 | if (minor != MOUSEDEV_MIX) | |
904 | input_unregister_handle(&mousedev->handle); | |
9657d75c DT |
905 | err_free_mousedev: |
906 | put_device(&mousedev->dev); | |
907 | err_out: | |
908 | return ERR_PTR(error); | |
909 | } | |
910 | ||
911 | static void mousedev_destroy(struct mousedev *mousedev) | |
912 | { | |
9657d75c | 913 | device_del(&mousedev->dev); |
464b2415 DT |
914 | mousedev_cleanup(mousedev); |
915 | if (mousedev->minor != MOUSEDEV_MIX) | |
916 | input_unregister_handle(&mousedev->handle); | |
917 | put_device(&mousedev->dev); | |
918 | } | |
9657d75c | 919 | |
464b2415 DT |
920 | static int mixdev_add_device(struct mousedev *mousedev) |
921 | { | |
922 | int retval; | |
923 | ||
924 | retval = mutex_lock_interruptible(&mousedev_mix->mutex); | |
925 | if (retval) | |
926 | return retval; | |
927 | ||
928 | if (mousedev_mix->open) { | |
929 | retval = mousedev_open_device(mousedev); | |
930 | if (retval) | |
931 | goto out; | |
932 | ||
933 | mousedev->mixdev_open = 1; | |
5b2a0826 | 934 | } |
c9bcd582 | 935 | |
464b2415 DT |
936 | get_device(&mousedev->dev); |
937 | list_add_tail(&mousedev->mixdev_node, &mousedev_mix_list); | |
938 | ||
939 | out: | |
940 | mutex_unlock(&mousedev_mix->mutex); | |
941 | return retval; | |
942 | } | |
943 | ||
944 | static void mixdev_remove_device(struct mousedev *mousedev) | |
945 | { | |
946 | mutex_lock(&mousedev_mix->mutex); | |
947 | ||
948 | if (mousedev->mixdev_open) { | |
949 | mousedev->mixdev_open = 0; | |
950 | mousedev_close_device(mousedev); | |
951 | } | |
952 | ||
953 | list_del_init(&mousedev->mixdev_node); | |
954 | mutex_unlock(&mousedev_mix->mutex); | |
955 | ||
9657d75c DT |
956 | put_device(&mousedev->dev); |
957 | } | |
958 | ||
464b2415 DT |
959 | static int mousedev_connect(struct input_handler *handler, |
960 | struct input_dev *dev, | |
9657d75c DT |
961 | const struct input_device_id *id) |
962 | { | |
963 | struct mousedev *mousedev; | |
964 | int minor; | |
965 | int error; | |
966 | ||
464b2415 DT |
967 | for (minor = 0; minor < MOUSEDEV_MINORS; minor++) |
968 | if (!mousedev_table[minor]) | |
969 | break; | |
970 | ||
9657d75c DT |
971 | if (minor == MOUSEDEV_MINORS) { |
972 | printk(KERN_ERR "mousedev: no more free mousedev devices\n"); | |
973 | return -ENFILE; | |
974 | } | |
975 | ||
976 | mousedev = mousedev_create(dev, handler, minor); | |
977 | if (IS_ERR(mousedev)) | |
978 | return PTR_ERR(mousedev); | |
5b2a0826 | 979 | |
d542ed82 | 980 | error = mixdev_add_device(mousedev); |
464b2415 DT |
981 | if (error) { |
982 | mousedev_destroy(mousedev); | |
983 | return error; | |
984 | } | |
1da177e4 | 985 | |
5b2a0826 | 986 | return 0; |
1da177e4 LT |
987 | } |
988 | ||
989 | static void mousedev_disconnect(struct input_handle *handle) | |
990 | { | |
991 | struct mousedev *mousedev = handle->private; | |
1da177e4 | 992 | |
d542ed82 | 993 | mixdev_remove_device(mousedev); |
9657d75c | 994 | mousedev_destroy(mousedev); |
1da177e4 LT |
995 | } |
996 | ||
66e66118 | 997 | static const struct input_device_id mousedev_ids[] = { |
1da177e4 | 998 | { |
464b2415 DT |
999 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1000 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1001 | INPUT_DEVICE_ID_MATCH_RELBIT, | |
7b19ada2 JS |
1002 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) }, |
1003 | .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) }, | |
1004 | .relbit = { BIT_MASK(REL_X) | BIT_MASK(REL_Y) }, | |
464b2415 DT |
1005 | }, /* A mouse like device, at least one button, |
1006 | two relative axes */ | |
1da177e4 | 1007 | { |
464b2415 DT |
1008 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1009 | INPUT_DEVICE_ID_MATCH_RELBIT, | |
7b19ada2 JS |
1010 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) }, |
1011 | .relbit = { BIT_MASK(REL_WHEEL) }, | |
1da177e4 LT |
1012 | }, /* A separate scrollwheel */ |
1013 | { | |
464b2415 DT |
1014 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1015 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1016 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
1017 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
1018 | .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) }, | |
1019 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) }, | |
464b2415 DT |
1020 | }, /* A tablet like device, at least touch detection, |
1021 | two absolute axes */ | |
1da177e4 | 1022 | { |
464b2415 DT |
1023 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1024 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1025 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
1026 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
1027 | .keybit = { [BIT_WORD(BTN_TOOL_FINGER)] = | |
1028 | BIT_MASK(BTN_TOOL_FINGER) }, | |
1029 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) | | |
1030 | BIT_MASK(ABS_PRESSURE) | | |
1031 | BIT_MASK(ABS_TOOL_WIDTH) }, | |
1da177e4 | 1032 | }, /* A touchpad */ |
6724f934 MP |
1033 | { |
1034 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
1035 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1036 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
d182c10c | 1037 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
6724f934 MP |
1038 | .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) }, |
1039 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) }, | |
1040 | }, /* Mouse-like device with absolute X and Y but ordinary | |
1041 | clicks, like hp ILO2 High Performance mouse */ | |
1da177e4 | 1042 | |
d0ffb9be | 1043 | { }, /* Terminating entry */ |
1da177e4 LT |
1044 | }; |
1045 | ||
1046 | MODULE_DEVICE_TABLE(input, mousedev_ids); | |
1047 | ||
1048 | static struct input_handler mousedev_handler = { | |
1049 | .event = mousedev_event, | |
1050 | .connect = mousedev_connect, | |
1051 | .disconnect = mousedev_disconnect, | |
1052 | .fops = &mousedev_fops, | |
1053 | .minor = MOUSEDEV_MINOR_BASE, | |
1054 | .name = "mousedev", | |
1055 | .id_table = mousedev_ids, | |
1056 | }; | |
1057 | ||
1058 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
1059 | static struct miscdevice psaux_mouse = { | |
1060 | PSMOUSE_MINOR, "psaux", &mousedev_fops | |
1061 | }; | |
1062 | static int psaux_registered; | |
1063 | #endif | |
1064 | ||
1065 | static int __init mousedev_init(void) | |
1066 | { | |
4263cf0f DT |
1067 | int error; |
1068 | ||
9657d75c DT |
1069 | mousedev_mix = mousedev_create(NULL, &mousedev_handler, MOUSEDEV_MIX); |
1070 | if (IS_ERR(mousedev_mix)) | |
1071 | return PTR_ERR(mousedev_mix); | |
1072 | ||
4263cf0f | 1073 | error = input_register_handler(&mousedev_handler); |
9657d75c DT |
1074 | if (error) { |
1075 | mousedev_destroy(mousedev_mix); | |
4263cf0f | 1076 | return error; |
4263cf0f | 1077 | } |
1da177e4 LT |
1078 | |
1079 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
4263cf0f DT |
1080 | error = misc_register(&psaux_mouse); |
1081 | if (error) | |
1082 | printk(KERN_WARNING "mice: could not register psaux device, " | |
1083 | "error: %d\n", error); | |
1084 | else | |
1085 | psaux_registered = 1; | |
1da177e4 LT |
1086 | #endif |
1087 | ||
1088 | printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n"); | |
1089 | ||
1090 | return 0; | |
1091 | } | |
1092 | ||
1093 | static void __exit mousedev_exit(void) | |
1094 | { | |
1095 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
1096 | if (psaux_registered) | |
1097 | misc_deregister(&psaux_mouse); | |
1098 | #endif | |
1da177e4 | 1099 | input_unregister_handler(&mousedev_handler); |
9657d75c | 1100 | mousedev_destroy(mousedev_mix); |
1da177e4 LT |
1101 | } |
1102 | ||
1103 | module_init(mousedev_init); | |
1104 | module_exit(mousedev_exit); |