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 | ||
da0c4901 JP |
12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
13 | ||
4f00469c | 14 | #define MOUSEDEV_MINOR_BASE 32 |
1da177e4 LT |
15 | #define MOUSEDEV_MINORS 32 |
16 | #define MOUSEDEV_MIX 31 | |
17 | ||
a99bbaf5 | 18 | #include <linux/sched.h> |
1da177e4 LT |
19 | #include <linux/slab.h> |
20 | #include <linux/poll.h> | |
21 | #include <linux/module.h> | |
1da177e4 LT |
22 | #include <linux/init.h> |
23 | #include <linux/input.h> | |
1da177e4 LT |
24 | #include <linux/random.h> |
25 | #include <linux/major.h> | |
26 | #include <linux/device.h> | |
987a6c02 | 27 | #include <linux/kernel.h> |
1da177e4 LT |
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 { | |
1da177e4 LT |
60 | int open; |
61 | int minor; | |
464b2415 | 62 | struct input_handle handle; |
1da177e4 | 63 | wait_queue_head_t wait; |
d0ffb9be | 64 | struct list_head client_list; |
464b2415 DT |
65 | spinlock_t client_lock; /* protects client_list */ |
66 | struct mutex mutex; | |
9657d75c | 67 | struct device dev; |
20da92de | 68 | bool exist; |
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 | 136 | case ABS_X: |
987a6c02 | 137 | |
464b2415 DT |
138 | fx(0) = value; |
139 | if (mousedev->touch && mousedev->pkt_count >= 2) { | |
268ba5c0 CF |
140 | size = input_abs_get_max(dev, ABS_X) - |
141 | input_abs_get_min(dev, ABS_X); | |
464b2415 DT |
142 | if (size == 0) |
143 | size = 256 * 2; | |
987a6c02 | 144 | |
464b2415 DT |
145 | tmp = ((value - fx(2)) * 256 * FRACTION_DENOM) / size; |
146 | tmp += mousedev->frac_dx; | |
147 | mousedev->packet.dx = tmp / FRACTION_DENOM; | |
148 | mousedev->frac_dx = | |
149 | tmp - mousedev->packet.dx * FRACTION_DENOM; | |
150 | } | |
151 | break; | |
152 | ||
153 | case ABS_Y: | |
154 | fy(0) = value; | |
155 | if (mousedev->touch && mousedev->pkt_count >= 2) { | |
987a6c02 | 156 | /* use X size for ABS_Y to keep the same scale */ |
268ba5c0 CF |
157 | size = input_abs_get_max(dev, ABS_X) - |
158 | input_abs_get_min(dev, ABS_X); | |
464b2415 DT |
159 | if (size == 0) |
160 | size = 256 * 2; | |
987a6c02 | 161 | |
464b2415 DT |
162 | tmp = -((value - fy(2)) * 256 * FRACTION_DENOM) / size; |
163 | tmp += mousedev->frac_dy; | |
164 | mousedev->packet.dy = tmp / FRACTION_DENOM; | |
165 | mousedev->frac_dy = tmp - | |
166 | mousedev->packet.dy * FRACTION_DENOM; | |
167 | } | |
168 | break; | |
1da177e4 LT |
169 | } |
170 | } | |
171 | ||
464b2415 DT |
172 | static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, |
173 | unsigned int code, int value) | |
1da177e4 | 174 | { |
987a6c02 | 175 | int min, max, size; |
1da177e4 LT |
176 | |
177 | switch (code) { | |
1da177e4 | 178 | |
464b2415 | 179 | case ABS_X: |
987a6c02 DM |
180 | min = input_abs_get_min(dev, ABS_X); |
181 | max = input_abs_get_max(dev, ABS_X); | |
182 | ||
183 | size = max - min; | |
464b2415 DT |
184 | if (size == 0) |
185 | size = xres ? : 1; | |
987a6c02 | 186 | |
8c127f07 | 187 | value = clamp(value, min, max); |
987a6c02 DM |
188 | |
189 | mousedev->packet.x = ((value - min) * xres) / size; | |
464b2415 DT |
190 | mousedev->packet.abs_event = 1; |
191 | break; | |
192 | ||
193 | case ABS_Y: | |
987a6c02 DM |
194 | min = input_abs_get_min(dev, ABS_Y); |
195 | max = input_abs_get_max(dev, ABS_Y); | |
196 | ||
197 | size = max - min; | |
464b2415 DT |
198 | if (size == 0) |
199 | size = yres ? : 1; | |
987a6c02 | 200 | |
8c127f07 | 201 | value = clamp(value, min, max); |
987a6c02 DM |
202 | |
203 | mousedev->packet.y = yres - ((value - min) * yres) / size; | |
464b2415 DT |
204 | mousedev->packet.abs_event = 1; |
205 | break; | |
1da177e4 LT |
206 | } |
207 | } | |
208 | ||
464b2415 DT |
209 | static void mousedev_rel_event(struct mousedev *mousedev, |
210 | unsigned int code, int value) | |
1da177e4 LT |
211 | { |
212 | switch (code) { | |
464b2415 DT |
213 | case REL_X: |
214 | mousedev->packet.dx += value; | |
215 | break; | |
216 | ||
217 | case REL_Y: | |
218 | mousedev->packet.dy -= value; | |
219 | break; | |
220 | ||
221 | case REL_WHEEL: | |
222 | mousedev->packet.dz -= value; | |
223 | break; | |
1da177e4 LT |
224 | } |
225 | } | |
226 | ||
464b2415 DT |
227 | static void mousedev_key_event(struct mousedev *mousedev, |
228 | unsigned int code, int value) | |
1da177e4 LT |
229 | { |
230 | int index; | |
231 | ||
232 | switch (code) { | |
464b2415 DT |
233 | |
234 | case BTN_TOUCH: | |
235 | case BTN_0: | |
236 | case BTN_LEFT: index = 0; break; | |
237 | ||
238 | case BTN_STYLUS: | |
239 | case BTN_1: | |
240 | case BTN_RIGHT: index = 1; break; | |
241 | ||
242 | case BTN_2: | |
243 | case BTN_FORWARD: | |
244 | case BTN_STYLUS2: | |
245 | case BTN_MIDDLE: index = 2; break; | |
246 | ||
247 | case BTN_3: | |
248 | case BTN_BACK: | |
249 | case BTN_SIDE: index = 3; break; | |
250 | ||
251 | case BTN_4: | |
252 | case BTN_EXTRA: index = 4; break; | |
253 | ||
254 | default: return; | |
1da177e4 LT |
255 | } |
256 | ||
257 | if (value) { | |
258 | set_bit(index, &mousedev->packet.buttons); | |
9657d75c | 259 | set_bit(index, &mousedev_mix->packet.buttons); |
1da177e4 LT |
260 | } else { |
261 | clear_bit(index, &mousedev->packet.buttons); | |
9657d75c | 262 | clear_bit(index, &mousedev_mix->packet.buttons); |
1da177e4 LT |
263 | } |
264 | } | |
265 | ||
464b2415 DT |
266 | static void mousedev_notify_readers(struct mousedev *mousedev, |
267 | struct mousedev_hw_data *packet) | |
1da177e4 | 268 | { |
d0ffb9be | 269 | struct mousedev_client *client; |
1da177e4 | 270 | struct mousedev_motion *p; |
464b2415 | 271 | unsigned int new_head; |
8121152c | 272 | int wake_readers = 0; |
1da177e4 | 273 | |
82ba56c2 | 274 | rcu_read_lock(); |
464b2415 DT |
275 | list_for_each_entry_rcu(client, &mousedev->client_list, node) { |
276 | ||
277 | /* Just acquire the lock, interrupts already disabled */ | |
278 | spin_lock(&client->packet_lock); | |
1da177e4 | 279 | |
d0ffb9be DT |
280 | p = &client->packets[client->head]; |
281 | if (client->ready && p->buttons != mousedev->packet.buttons) { | |
464b2415 | 282 | new_head = (client->head + 1) % PACKET_QUEUE_LEN; |
d0ffb9be DT |
283 | if (new_head != client->tail) { |
284 | p = &client->packets[client->head = new_head]; | |
1da177e4 LT |
285 | memset(p, 0, sizeof(struct mousedev_motion)); |
286 | } | |
287 | } | |
288 | ||
289 | if (packet->abs_event) { | |
d0ffb9be DT |
290 | p->dx += packet->x - client->pos_x; |
291 | p->dy += packet->y - client->pos_y; | |
292 | client->pos_x = packet->x; | |
293 | client->pos_y = packet->y; | |
1da177e4 LT |
294 | } |
295 | ||
d0ffb9be | 296 | client->pos_x += packet->dx; |
464b2415 DT |
297 | client->pos_x = client->pos_x < 0 ? |
298 | 0 : (client->pos_x >= xres ? xres : client->pos_x); | |
d0ffb9be | 299 | client->pos_y += packet->dy; |
464b2415 DT |
300 | client->pos_y = client->pos_y < 0 ? |
301 | 0 : (client->pos_y >= yres ? yres : client->pos_y); | |
1da177e4 LT |
302 | |
303 | p->dx += packet->dx; | |
304 | p->dy += packet->dy; | |
305 | p->dz += packet->dz; | |
306 | p->buttons = mousedev->packet.buttons; | |
307 | ||
464b2415 DT |
308 | if (p->dx || p->dy || p->dz || |
309 | p->buttons != client->last_buttons) | |
d0ffb9be | 310 | client->ready = 1; |
1da177e4 | 311 | |
464b2415 | 312 | spin_unlock(&client->packet_lock); |
c1e4c8d3 | 313 | |
d0ffb9be DT |
314 | if (client->ready) { |
315 | kill_fasync(&client->fasync, SIGIO, POLL_IN); | |
8121152c DT |
316 | wake_readers = 1; |
317 | } | |
1da177e4 | 318 | } |
82ba56c2 | 319 | rcu_read_unlock(); |
1da177e4 | 320 | |
8121152c DT |
321 | if (wake_readers) |
322 | wake_up_interruptible(&mousedev->wait); | |
1da177e4 LT |
323 | } |
324 | ||
325 | static void mousedev_touchpad_touch(struct mousedev *mousedev, int value) | |
326 | { | |
327 | if (!value) { | |
328 | if (mousedev->touch && | |
464b2415 DT |
329 | time_before(jiffies, |
330 | mousedev->touch + msecs_to_jiffies(tap_time))) { | |
1da177e4 LT |
331 | /* |
332 | * Toggle left button to emulate tap. | |
333 | * We rely on the fact that mousedev_mix always has 0 | |
334 | * motion packet so we won't mess current position. | |
335 | */ | |
336 | set_bit(0, &mousedev->packet.buttons); | |
9657d75c DT |
337 | set_bit(0, &mousedev_mix->packet.buttons); |
338 | mousedev_notify_readers(mousedev, &mousedev_mix->packet); | |
464b2415 DT |
339 | mousedev_notify_readers(mousedev_mix, |
340 | &mousedev_mix->packet); | |
1da177e4 | 341 | clear_bit(0, &mousedev->packet.buttons); |
9657d75c | 342 | clear_bit(0, &mousedev_mix->packet.buttons); |
1da177e4 LT |
343 | } |
344 | mousedev->touch = mousedev->pkt_count = 0; | |
345 | mousedev->frac_dx = 0; | |
346 | mousedev->frac_dy = 0; | |
1e0afb28 DT |
347 | |
348 | } else if (!mousedev->touch) | |
349 | mousedev->touch = jiffies; | |
1da177e4 LT |
350 | } |
351 | ||
464b2415 DT |
352 | static void mousedev_event(struct input_handle *handle, |
353 | unsigned int type, unsigned int code, int value) | |
1da177e4 LT |
354 | { |
355 | struct mousedev *mousedev = handle->private; | |
356 | ||
357 | switch (type) { | |
1da177e4 | 358 | |
464b2415 DT |
359 | case EV_ABS: |
360 | /* Ignore joysticks */ | |
361 | if (test_bit(BTN_TRIGGER, handle->dev->keybit)) | |
362 | return; | |
1da177e4 | 363 | |
464b2415 DT |
364 | if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) |
365 | mousedev_touchpad_event(handle->dev, | |
366 | mousedev, code, value); | |
367 | else | |
368 | mousedev_abs_event(handle->dev, mousedev, code, value); | |
1da177e4 | 369 | |
464b2415 | 370 | break; |
1da177e4 | 371 | |
464b2415 DT |
372 | case EV_REL: |
373 | mousedev_rel_event(mousedev, code, value); | |
374 | break; | |
1da177e4 | 375 | |
464b2415 DT |
376 | case EV_KEY: |
377 | if (value != 2) { | |
378 | if (code == BTN_TOUCH && | |
379 | test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) | |
380 | mousedev_touchpad_touch(mousedev, value); | |
381 | else | |
382 | mousedev_key_event(mousedev, code, value); | |
383 | } | |
384 | break; | |
385 | ||
386 | case EV_SYN: | |
387 | if (code == SYN_REPORT) { | |
388 | if (mousedev->touch) { | |
389 | mousedev->pkt_count++; | |
390 | /* | |
391 | * Input system eats duplicate events, | |
392 | * but we need all of them to do correct | |
393 | * averaging so apply present one forward | |
394 | */ | |
395 | fx(0) = fx(1); | |
396 | fy(0) = fy(1); | |
1da177e4 | 397 | } |
464b2415 DT |
398 | |
399 | mousedev_notify_readers(mousedev, &mousedev->packet); | |
400 | mousedev_notify_readers(mousedev_mix, &mousedev->packet); | |
401 | ||
402 | mousedev->packet.dx = mousedev->packet.dy = | |
403 | mousedev->packet.dz = 0; | |
404 | mousedev->packet.abs_event = 0; | |
405 | } | |
406 | break; | |
1da177e4 LT |
407 | } |
408 | } | |
409 | ||
410 | static int mousedev_fasync(int fd, struct file *file, int on) | |
411 | { | |
d0ffb9be | 412 | struct mousedev_client *client = file->private_data; |
1e0afb28 | 413 | |
60aa4924 | 414 | return fasync_helper(fd, file, on, &client->fasync); |
1da177e4 LT |
415 | } |
416 | ||
9657d75c | 417 | static void mousedev_free(struct device *dev) |
1da177e4 | 418 | { |
9657d75c DT |
419 | struct mousedev *mousedev = container_of(dev, struct mousedev, dev); |
420 | ||
a7097ff8 | 421 | input_put_device(mousedev->handle.dev); |
1da177e4 LT |
422 | kfree(mousedev); |
423 | } | |
424 | ||
464b2415 | 425 | static int mousedev_open_device(struct mousedev *mousedev) |
1da177e4 | 426 | { |
464b2415 | 427 | int retval; |
1da177e4 | 428 | |
464b2415 DT |
429 | retval = mutex_lock_interruptible(&mousedev->mutex); |
430 | if (retval) | |
431 | return retval; | |
d542ed82 | 432 | |
464b2415 DT |
433 | if (mousedev->minor == MOUSEDEV_MIX) |
434 | mixdev_open_devices(); | |
435 | else if (!mousedev->exist) | |
436 | retval = -ENODEV; | |
06445014 | 437 | else if (!mousedev->open++) { |
464b2415 | 438 | retval = input_open_device(&mousedev->handle); |
06445014 ON |
439 | if (retval) |
440 | mousedev->open--; | |
441 | } | |
d542ed82 | 442 | |
464b2415 DT |
443 | mutex_unlock(&mousedev->mutex); |
444 | return retval; | |
d542ed82 DT |
445 | } |
446 | ||
464b2415 | 447 | static void mousedev_close_device(struct mousedev *mousedev) |
d542ed82 | 448 | { |
464b2415 | 449 | mutex_lock(&mousedev->mutex); |
d542ed82 | 450 | |
464b2415 DT |
451 | if (mousedev->minor == MOUSEDEV_MIX) |
452 | mixdev_close_devices(); | |
453 | else if (mousedev->exist && !--mousedev->open) | |
454 | input_close_device(&mousedev->handle); | |
455 | ||
456 | mutex_unlock(&mousedev->mutex); | |
d542ed82 DT |
457 | } |
458 | ||
464b2415 DT |
459 | /* |
460 | * Open all available devices so they can all be multiplexed in one. | |
461 | * stream. Note that this function is called with mousedev_mix->mutex | |
462 | * held. | |
463 | */ | |
d542ed82 DT |
464 | static void mixdev_open_devices(void) |
465 | { | |
466 | struct mousedev *mousedev; | |
467 | ||
9657d75c DT |
468 | if (mousedev_mix->open++) |
469 | return; | |
470 | ||
d542ed82 | 471 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { |
9657d75c | 472 | if (!mousedev->mixdev_open) { |
464b2415 DT |
473 | if (mousedev_open_device(mousedev)) |
474 | continue; | |
d542ed82 | 475 | |
9657d75c | 476 | mousedev->mixdev_open = 1; |
1da177e4 LT |
477 | } |
478 | } | |
1da177e4 LT |
479 | } |
480 | ||
464b2415 DT |
481 | /* |
482 | * Close all devices that were opened as part of multiplexed | |
483 | * device. Note that this function is called with mousedev_mix->mutex | |
484 | * held. | |
485 | */ | |
d542ed82 | 486 | static void mixdev_close_devices(void) |
1da177e4 | 487 | { |
9657d75c | 488 | struct mousedev *mousedev; |
d542ed82 | 489 | |
9657d75c DT |
490 | if (--mousedev_mix->open) |
491 | return; | |
492 | ||
493 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { | |
d542ed82 DT |
494 | if (mousedev->mixdev_open) { |
495 | mousedev->mixdev_open = 0; | |
464b2415 | 496 | mousedev_close_device(mousedev); |
1da177e4 LT |
497 | } |
498 | } | |
1da177e4 LT |
499 | } |
500 | ||
464b2415 DT |
501 | |
502 | static void mousedev_attach_client(struct mousedev *mousedev, | |
503 | struct mousedev_client *client) | |
504 | { | |
505 | spin_lock(&mousedev->client_lock); | |
506 | list_add_tail_rcu(&client->node, &mousedev->client_list); | |
507 | spin_unlock(&mousedev->client_lock); | |
464b2415 DT |
508 | } |
509 | ||
510 | static void mousedev_detach_client(struct mousedev *mousedev, | |
511 | struct mousedev_client *client) | |
512 | { | |
513 | spin_lock(&mousedev->client_lock); | |
514 | list_del_rcu(&client->node); | |
515 | spin_unlock(&mousedev->client_lock); | |
82ba56c2 | 516 | synchronize_rcu(); |
464b2415 DT |
517 | } |
518 | ||
d0ffb9be | 519 | static int mousedev_release(struct inode *inode, struct file *file) |
1da177e4 | 520 | { |
d0ffb9be DT |
521 | struct mousedev_client *client = file->private_data; |
522 | struct mousedev *mousedev = client->mousedev; | |
1da177e4 | 523 | |
464b2415 | 524 | mousedev_detach_client(mousedev, client); |
d0ffb9be | 525 | kfree(client); |
1da177e4 | 526 | |
464b2415 | 527 | mousedev_close_device(mousedev); |
9657d75c | 528 | put_device(&mousedev->dev); |
1da177e4 | 529 | |
1da177e4 LT |
530 | return 0; |
531 | } | |
532 | ||
d0ffb9be | 533 | static int mousedev_open(struct inode *inode, struct file *file) |
1da177e4 | 534 | { |
d0ffb9be | 535 | struct mousedev_client *client; |
1da177e4 | 536 | struct mousedev *mousedev; |
d542ed82 | 537 | int error; |
1da177e4 LT |
538 | int i; |
539 | ||
540 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
541 | if (imajor(inode) == MISC_MAJOR) | |
542 | i = MOUSEDEV_MIX; | |
543 | else | |
544 | #endif | |
545 | i = iminor(inode) - MOUSEDEV_MINOR_BASE; | |
546 | ||
d0ffb9be | 547 | if (i >= MOUSEDEV_MINORS) |
1da177e4 LT |
548 | return -ENODEV; |
549 | ||
464b2415 | 550 | error = mutex_lock_interruptible(&mousedev_table_mutex); |
41091ad0 | 551 | if (error) |
464b2415 | 552 | return error; |
41091ad0 | 553 | |
d0ffb9be | 554 | mousedev = mousedev_table[i]; |
464b2415 DT |
555 | if (mousedev) |
556 | get_device(&mousedev->dev); | |
557 | mutex_unlock(&mousedev_table_mutex); | |
558 | ||
41091ad0 | 559 | if (!mousedev) |
1da177e4 LT |
560 | return -ENODEV; |
561 | ||
d0ffb9be | 562 | client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL); |
9657d75c DT |
563 | if (!client) { |
564 | error = -ENOMEM; | |
565 | goto err_put_mousedev; | |
566 | } | |
1da177e4 | 567 | |
d0ffb9be DT |
568 | spin_lock_init(&client->packet_lock); |
569 | client->pos_x = xres / 2; | |
570 | client->pos_y = yres / 2; | |
571 | client->mousedev = mousedev; | |
464b2415 | 572 | mousedev_attach_client(mousedev, client); |
1da177e4 | 573 | |
464b2415 DT |
574 | error = mousedev_open_device(mousedev); |
575 | if (error) | |
576 | goto err_free_client; | |
1da177e4 | 577 | |
d0ffb9be | 578 | file->private_data = client; |
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); | |
586 | return error; | |
1da177e4 LT |
587 | } |
588 | ||
589 | static inline int mousedev_limit_delta(int delta, int limit) | |
590 | { | |
591 | return delta > limit ? limit : (delta < -limit ? -limit : delta); | |
592 | } | |
593 | ||
464b2415 DT |
594 | static void mousedev_packet(struct mousedev_client *client, |
595 | signed char *ps2_data) | |
1da177e4 | 596 | { |
464b2415 | 597 | struct mousedev_motion *p = &client->packets[client->tail]; |
1da177e4 | 598 | |
464b2415 DT |
599 | ps2_data[0] = 0x08 | |
600 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07); | |
1da177e4 LT |
601 | ps2_data[1] = mousedev_limit_delta(p->dx, 127); |
602 | ps2_data[2] = mousedev_limit_delta(p->dy, 127); | |
603 | p->dx -= ps2_data[1]; | |
604 | p->dy -= ps2_data[2]; | |
605 | ||
d0ffb9be | 606 | switch (client->mode) { |
464b2415 DT |
607 | case MOUSEDEV_EMUL_EXPS: |
608 | ps2_data[3] = mousedev_limit_delta(p->dz, 7); | |
609 | p->dz -= ps2_data[3]; | |
610 | ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1); | |
611 | client->bufsiz = 4; | |
612 | break; | |
613 | ||
614 | case MOUSEDEV_EMUL_IMPS: | |
615 | ps2_data[0] |= | |
616 | ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); | |
617 | ps2_data[3] = mousedev_limit_delta(p->dz, 127); | |
618 | p->dz -= ps2_data[3]; | |
619 | client->bufsiz = 4; | |
620 | break; | |
621 | ||
622 | case MOUSEDEV_EMUL_PS2: | |
623 | default: | |
624 | ps2_data[0] |= | |
625 | ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); | |
626 | p->dz = 0; | |
627 | client->bufsiz = 3; | |
628 | break; | |
1da177e4 LT |
629 | } |
630 | ||
631 | if (!p->dx && !p->dy && !p->dz) { | |
d0ffb9be DT |
632 | if (client->tail == client->head) { |
633 | client->ready = 0; | |
634 | client->last_buttons = p->buttons; | |
c1e4c8d3 | 635 | } else |
d0ffb9be | 636 | client->tail = (client->tail + 1) % PACKET_QUEUE_LEN; |
1da177e4 | 637 | } |
1da177e4 LT |
638 | } |
639 | ||
464b2415 DT |
640 | static void mousedev_generate_response(struct mousedev_client *client, |
641 | int command) | |
642 | { | |
643 | client->ps2[0] = 0xfa; /* ACK */ | |
1da177e4 | 644 | |
464b2415 DT |
645 | switch (command) { |
646 | ||
647 | case 0xeb: /* Poll */ | |
648 | mousedev_packet(client, &client->ps2[1]); | |
649 | client->bufsiz++; /* account for leading ACK */ | |
650 | break; | |
651 | ||
652 | case 0xf2: /* Get ID */ | |
653 | switch (client->mode) { | |
654 | case MOUSEDEV_EMUL_PS2: | |
655 | client->ps2[1] = 0; | |
656 | break; | |
657 | case MOUSEDEV_EMUL_IMPS: | |
658 | client->ps2[1] = 3; | |
659 | break; | |
660 | case MOUSEDEV_EMUL_EXPS: | |
661 | client->ps2[1] = 4; | |
662 | break; | |
663 | } | |
664 | client->bufsiz = 2; | |
665 | break; | |
666 | ||
667 | case 0xe9: /* Get info */ | |
668 | client->ps2[1] = 0x60; client->ps2[2] = 3; client->ps2[3] = 200; | |
669 | client->bufsiz = 4; | |
670 | break; | |
671 | ||
672 | case 0xff: /* Reset */ | |
673 | client->impsseq = client->imexseq = 0; | |
674 | client->mode = MOUSEDEV_EMUL_PS2; | |
675 | client->ps2[1] = 0xaa; client->ps2[2] = 0x00; | |
676 | client->bufsiz = 3; | |
677 | break; | |
678 | ||
679 | default: | |
680 | client->bufsiz = 1; | |
681 | break; | |
682 | } | |
683 | client->buffer = client->bufsiz; | |
684 | } | |
685 | ||
686 | static ssize_t mousedev_write(struct file *file, const char __user *buffer, | |
687 | size_t count, loff_t *ppos) | |
1da177e4 | 688 | { |
d0ffb9be | 689 | struct mousedev_client *client = file->private_data; |
1da177e4 LT |
690 | unsigned char c; |
691 | unsigned int i; | |
692 | ||
693 | for (i = 0; i < count; i++) { | |
694 | ||
695 | if (get_user(c, buffer + i)) | |
696 | return -EFAULT; | |
697 | ||
464b2415 DT |
698 | spin_lock_irq(&client->packet_lock); |
699 | ||
d0ffb9be DT |
700 | if (c == mousedev_imex_seq[client->imexseq]) { |
701 | if (++client->imexseq == MOUSEDEV_SEQ_LEN) { | |
702 | client->imexseq = 0; | |
703 | client->mode = MOUSEDEV_EMUL_EXPS; | |
1da177e4 | 704 | } |
1e0afb28 | 705 | } else |
d0ffb9be | 706 | client->imexseq = 0; |
1da177e4 | 707 | |
d0ffb9be DT |
708 | if (c == mousedev_imps_seq[client->impsseq]) { |
709 | if (++client->impsseq == MOUSEDEV_SEQ_LEN) { | |
710 | client->impsseq = 0; | |
711 | client->mode = MOUSEDEV_EMUL_IMPS; | |
1da177e4 | 712 | } |
1e0afb28 | 713 | } else |
d0ffb9be | 714 | client->impsseq = 0; |
1da177e4 | 715 | |
464b2415 | 716 | mousedev_generate_response(client, c); |
1da177e4 | 717 | |
464b2415 | 718 | spin_unlock_irq(&client->packet_lock); |
1da177e4 LT |
719 | } |
720 | ||
d0ffb9be | 721 | kill_fasync(&client->fasync, SIGIO, POLL_IN); |
d0ffb9be | 722 | wake_up_interruptible(&client->mousedev->wait); |
1da177e4 LT |
723 | |
724 | return count; | |
725 | } | |
726 | ||
464b2415 DT |
727 | static ssize_t mousedev_read(struct file *file, char __user *buffer, |
728 | size_t count, loff_t *ppos) | |
1da177e4 | 729 | { |
d0ffb9be | 730 | struct mousedev_client *client = file->private_data; |
464b2415 DT |
731 | struct mousedev *mousedev = client->mousedev; |
732 | signed char data[sizeof(client->ps2)]; | |
1da177e4 LT |
733 | int retval = 0; |
734 | ||
464b2415 DT |
735 | if (!client->ready && !client->buffer && mousedev->exist && |
736 | (file->f_flags & O_NONBLOCK)) | |
1da177e4 LT |
737 | return -EAGAIN; |
738 | ||
464b2415 DT |
739 | retval = wait_event_interruptible(mousedev->wait, |
740 | !mousedev->exist || client->ready || client->buffer); | |
1da177e4 LT |
741 | if (retval) |
742 | return retval; | |
743 | ||
464b2415 | 744 | if (!mousedev->exist) |
1da177e4 LT |
745 | return -ENODEV; |
746 | ||
464b2415 DT |
747 | spin_lock_irq(&client->packet_lock); |
748 | ||
d0ffb9be DT |
749 | if (!client->buffer && client->ready) { |
750 | mousedev_packet(client, client->ps2); | |
751 | client->buffer = client->bufsiz; | |
1da177e4 LT |
752 | } |
753 | ||
d0ffb9be DT |
754 | if (count > client->buffer) |
755 | count = client->buffer; | |
1da177e4 | 756 | |
464b2415 | 757 | memcpy(data, client->ps2 + client->bufsiz - client->buffer, count); |
d0ffb9be | 758 | client->buffer -= count; |
1da177e4 | 759 | |
464b2415 DT |
760 | spin_unlock_irq(&client->packet_lock); |
761 | ||
762 | if (copy_to_user(buffer, data, count)) | |
1da177e4 LT |
763 | return -EFAULT; |
764 | ||
765 | return count; | |
766 | } | |
767 | ||
768 | /* No kernel lock - fine */ | |
769 | static unsigned int mousedev_poll(struct file *file, poll_table *wait) | |
770 | { | |
d0ffb9be DT |
771 | struct mousedev_client *client = file->private_data; |
772 | struct mousedev *mousedev = client->mousedev; | |
4d4bf995 | 773 | unsigned int mask; |
1e0afb28 | 774 | |
d0ffb9be | 775 | poll_wait(file, &mousedev->wait, wait); |
4d4bf995 JM |
776 | |
777 | mask = mousedev->exist ? POLLOUT | POLLWRNORM : POLLHUP | POLLERR; | |
778 | if (client->ready || client->buffer) | |
779 | mask |= POLLIN | POLLRDNORM; | |
780 | ||
781 | return mask; | |
1da177e4 LT |
782 | } |
783 | ||
66e66118 | 784 | static const struct file_operations mousedev_fops = { |
1da177e4 LT |
785 | .owner = THIS_MODULE, |
786 | .read = mousedev_read, | |
787 | .write = mousedev_write, | |
788 | .poll = mousedev_poll, | |
789 | .open = mousedev_open, | |
790 | .release = mousedev_release, | |
791 | .fasync = mousedev_fasync, | |
6038f373 | 792 | .llseek = noop_llseek, |
1da177e4 LT |
793 | }; |
794 | ||
464b2415 DT |
795 | static int mousedev_install_chrdev(struct mousedev *mousedev) |
796 | { | |
797 | mousedev_table[mousedev->minor] = mousedev; | |
798 | return 0; | |
799 | } | |
800 | ||
801 | static void mousedev_remove_chrdev(struct mousedev *mousedev) | |
802 | { | |
803 | mutex_lock(&mousedev_table_mutex); | |
804 | mousedev_table[mousedev->minor] = NULL; | |
805 | mutex_unlock(&mousedev_table_mutex); | |
806 | } | |
807 | ||
808 | /* | |
809 | * Mark device non-existent. This disables writes, ioctls and | |
810 | * prevents new users from opening the device. Already posted | |
811 | * blocking reads will stay, however new ones will fail. | |
812 | */ | |
813 | static void mousedev_mark_dead(struct mousedev *mousedev) | |
814 | { | |
815 | mutex_lock(&mousedev->mutex); | |
20da92de | 816 | mousedev->exist = false; |
464b2415 DT |
817 | mutex_unlock(&mousedev->mutex); |
818 | } | |
819 | ||
820 | /* | |
821 | * Wake up users waiting for IO so they can disconnect from | |
822 | * dead device. | |
823 | */ | |
824 | static void mousedev_hangup(struct mousedev *mousedev) | |
825 | { | |
826 | struct mousedev_client *client; | |
827 | ||
828 | spin_lock(&mousedev->client_lock); | |
829 | list_for_each_entry(client, &mousedev->client_list, node) | |
830 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
831 | spin_unlock(&mousedev->client_lock); | |
832 | ||
833 | wake_up_interruptible(&mousedev->wait); | |
834 | } | |
835 | ||
836 | static void mousedev_cleanup(struct mousedev *mousedev) | |
837 | { | |
838 | struct input_handle *handle = &mousedev->handle; | |
839 | ||
840 | mousedev_mark_dead(mousedev); | |
841 | mousedev_hangup(mousedev); | |
842 | mousedev_remove_chrdev(mousedev); | |
843 | ||
844 | /* mousedev is marked dead so no one else accesses mousedev->open */ | |
845 | if (mousedev->open) | |
846 | input_close_device(handle); | |
847 | } | |
848 | ||
9657d75c DT |
849 | static struct mousedev *mousedev_create(struct input_dev *dev, |
850 | struct input_handler *handler, | |
851 | int minor) | |
1da177e4 LT |
852 | { |
853 | struct mousedev *mousedev; | |
5b2a0826 | 854 | int error; |
1da177e4 | 855 | |
5b2a0826 | 856 | mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL); |
9657d75c DT |
857 | if (!mousedev) { |
858 | error = -ENOMEM; | |
859 | goto err_out; | |
860 | } | |
1da177e4 | 861 | |
d0ffb9be | 862 | INIT_LIST_HEAD(&mousedev->client_list); |
5b2a0826 | 863 | INIT_LIST_HEAD(&mousedev->mixdev_node); |
464b2415 DT |
864 | spin_lock_init(&mousedev->client_lock); |
865 | mutex_init(&mousedev->mutex); | |
866 | lockdep_set_subclass(&mousedev->mutex, | |
f74eef95 | 867 | minor == MOUSEDEV_MIX ? SINGLE_DEPTH_NESTING : 0); |
1da177e4 LT |
868 | init_waitqueue_head(&mousedev->wait); |
869 | ||
9657d75c | 870 | if (minor == MOUSEDEV_MIX) |
3d5cb60e | 871 | dev_set_name(&mousedev->dev, "mice"); |
9657d75c | 872 | else |
3d5cb60e | 873 | dev_set_name(&mousedev->dev, "mouse%d", minor); |
9657d75c | 874 | |
1da177e4 | 875 | mousedev->minor = minor; |
20da92de | 876 | mousedev->exist = true; |
a7097ff8 | 877 | mousedev->handle.dev = input_get_device(dev); |
3d5cb60e | 878 | mousedev->handle.name = dev_name(&mousedev->dev); |
1da177e4 LT |
879 | mousedev->handle.handler = handler; |
880 | mousedev->handle.private = mousedev; | |
1da177e4 | 881 | |
9657d75c DT |
882 | mousedev->dev.class = &input_class; |
883 | if (dev) | |
884 | mousedev->dev.parent = &dev->dev; | |
885 | mousedev->dev.devt = MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor); | |
886 | mousedev->dev.release = mousedev_free; | |
887 | device_initialize(&mousedev->dev); | |
1da177e4 | 888 | |
464b2415 DT |
889 | if (minor != MOUSEDEV_MIX) { |
890 | error = input_register_handle(&mousedev->handle); | |
891 | if (error) | |
892 | goto err_free_mousedev; | |
893 | } | |
894 | ||
895 | error = mousedev_install_chrdev(mousedev); | |
896 | if (error) | |
897 | goto err_unregister_handle; | |
5b2a0826 | 898 | |
9657d75c DT |
899 | error = device_add(&mousedev->dev); |
900 | if (error) | |
464b2415 | 901 | goto err_cleanup_mousedev; |
9657d75c DT |
902 | |
903 | return mousedev; | |
904 | ||
464b2415 DT |
905 | err_cleanup_mousedev: |
906 | mousedev_cleanup(mousedev); | |
907 | err_unregister_handle: | |
908 | if (minor != MOUSEDEV_MIX) | |
909 | input_unregister_handle(&mousedev->handle); | |
9657d75c DT |
910 | err_free_mousedev: |
911 | put_device(&mousedev->dev); | |
912 | err_out: | |
913 | return ERR_PTR(error); | |
914 | } | |
915 | ||
916 | static void mousedev_destroy(struct mousedev *mousedev) | |
917 | { | |
9657d75c | 918 | device_del(&mousedev->dev); |
464b2415 DT |
919 | mousedev_cleanup(mousedev); |
920 | if (mousedev->minor != MOUSEDEV_MIX) | |
921 | input_unregister_handle(&mousedev->handle); | |
922 | put_device(&mousedev->dev); | |
923 | } | |
9657d75c | 924 | |
464b2415 DT |
925 | static int mixdev_add_device(struct mousedev *mousedev) |
926 | { | |
927 | int retval; | |
928 | ||
929 | retval = mutex_lock_interruptible(&mousedev_mix->mutex); | |
930 | if (retval) | |
931 | return retval; | |
932 | ||
933 | if (mousedev_mix->open) { | |
934 | retval = mousedev_open_device(mousedev); | |
935 | if (retval) | |
936 | goto out; | |
937 | ||
938 | mousedev->mixdev_open = 1; | |
5b2a0826 | 939 | } |
c9bcd582 | 940 | |
464b2415 DT |
941 | get_device(&mousedev->dev); |
942 | list_add_tail(&mousedev->mixdev_node, &mousedev_mix_list); | |
943 | ||
944 | out: | |
945 | mutex_unlock(&mousedev_mix->mutex); | |
946 | return retval; | |
947 | } | |
948 | ||
949 | static void mixdev_remove_device(struct mousedev *mousedev) | |
950 | { | |
951 | mutex_lock(&mousedev_mix->mutex); | |
952 | ||
953 | if (mousedev->mixdev_open) { | |
954 | mousedev->mixdev_open = 0; | |
955 | mousedev_close_device(mousedev); | |
956 | } | |
957 | ||
958 | list_del_init(&mousedev->mixdev_node); | |
959 | mutex_unlock(&mousedev_mix->mutex); | |
960 | ||
9657d75c DT |
961 | put_device(&mousedev->dev); |
962 | } | |
963 | ||
464b2415 DT |
964 | static int mousedev_connect(struct input_handler *handler, |
965 | struct input_dev *dev, | |
9657d75c DT |
966 | const struct input_device_id *id) |
967 | { | |
968 | struct mousedev *mousedev; | |
969 | int minor; | |
970 | int error; | |
971 | ||
464b2415 DT |
972 | for (minor = 0; minor < MOUSEDEV_MINORS; minor++) |
973 | if (!mousedev_table[minor]) | |
974 | break; | |
975 | ||
9657d75c | 976 | if (minor == MOUSEDEV_MINORS) { |
da0c4901 | 977 | pr_err("no more free mousedev devices\n"); |
9657d75c DT |
978 | return -ENFILE; |
979 | } | |
980 | ||
981 | mousedev = mousedev_create(dev, handler, minor); | |
982 | if (IS_ERR(mousedev)) | |
983 | return PTR_ERR(mousedev); | |
5b2a0826 | 984 | |
d542ed82 | 985 | error = mixdev_add_device(mousedev); |
464b2415 DT |
986 | if (error) { |
987 | mousedev_destroy(mousedev); | |
988 | return error; | |
989 | } | |
1da177e4 | 990 | |
5b2a0826 | 991 | return 0; |
1da177e4 LT |
992 | } |
993 | ||
994 | static void mousedev_disconnect(struct input_handle *handle) | |
995 | { | |
996 | struct mousedev *mousedev = handle->private; | |
1da177e4 | 997 | |
d542ed82 | 998 | mixdev_remove_device(mousedev); |
9657d75c | 999 | mousedev_destroy(mousedev); |
1da177e4 LT |
1000 | } |
1001 | ||
66e66118 | 1002 | static const struct input_device_id mousedev_ids[] = { |
1da177e4 | 1003 | { |
464b2415 DT |
1004 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1005 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1006 | INPUT_DEVICE_ID_MATCH_RELBIT, | |
7b19ada2 JS |
1007 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) }, |
1008 | .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) }, | |
1009 | .relbit = { BIT_MASK(REL_X) | BIT_MASK(REL_Y) }, | |
464b2415 DT |
1010 | }, /* A mouse like device, at least one button, |
1011 | two relative axes */ | |
1da177e4 | 1012 | { |
464b2415 DT |
1013 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1014 | INPUT_DEVICE_ID_MATCH_RELBIT, | |
7b19ada2 JS |
1015 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) }, |
1016 | .relbit = { BIT_MASK(REL_WHEEL) }, | |
1da177e4 LT |
1017 | }, /* A separate scrollwheel */ |
1018 | { | |
464b2415 DT |
1019 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1020 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1021 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
1022 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
1023 | .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) }, | |
1024 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) }, | |
464b2415 DT |
1025 | }, /* A tablet like device, at least touch detection, |
1026 | two absolute axes */ | |
1da177e4 | 1027 | { |
464b2415 DT |
1028 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1029 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1030 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
1031 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
1032 | .keybit = { [BIT_WORD(BTN_TOOL_FINGER)] = | |
1033 | BIT_MASK(BTN_TOOL_FINGER) }, | |
1034 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) | | |
1035 | BIT_MASK(ABS_PRESSURE) | | |
1036 | BIT_MASK(ABS_TOOL_WIDTH) }, | |
1da177e4 | 1037 | }, /* A touchpad */ |
6724f934 MP |
1038 | { |
1039 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
1040 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1041 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
d182c10c | 1042 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
6724f934 MP |
1043 | .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) }, |
1044 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) }, | |
1045 | }, /* Mouse-like device with absolute X and Y but ordinary | |
1046 | clicks, like hp ILO2 High Performance mouse */ | |
1da177e4 | 1047 | |
d0ffb9be | 1048 | { }, /* Terminating entry */ |
1da177e4 LT |
1049 | }; |
1050 | ||
1051 | MODULE_DEVICE_TABLE(input, mousedev_ids); | |
1052 | ||
1053 | static struct input_handler mousedev_handler = { | |
1054 | .event = mousedev_event, | |
1055 | .connect = mousedev_connect, | |
1056 | .disconnect = mousedev_disconnect, | |
1057 | .fops = &mousedev_fops, | |
1058 | .minor = MOUSEDEV_MINOR_BASE, | |
1059 | .name = "mousedev", | |
1060 | .id_table = mousedev_ids, | |
1061 | }; | |
1062 | ||
1063 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
a2cb1191 DT |
1064 | #include <linux/miscdevice.h> |
1065 | ||
1da177e4 | 1066 | static struct miscdevice psaux_mouse = { |
a2cb1191 DT |
1067 | .minor = PSMOUSE_MINOR, |
1068 | .name = "psaux", | |
1069 | .fops = &mousedev_fops, | |
1da177e4 | 1070 | }; |
a2cb1191 DT |
1071 | |
1072 | static bool psaux_registered; | |
1073 | ||
1074 | static void __init mousedev_psaux_register(void) | |
1075 | { | |
1076 | int error; | |
1077 | ||
1078 | error = misc_register(&psaux_mouse); | |
1079 | if (error) | |
1080 | pr_warn("could not register psaux device, error: %d\n", | |
1081 | error); | |
1082 | else | |
1083 | psaux_registered = true; | |
1084 | } | |
1085 | ||
1086 | static void __exit mousedev_psaux_unregister(void) | |
1087 | { | |
1088 | if (psaux_registered) | |
1089 | misc_deregister(&psaux_mouse); | |
1090 | } | |
1091 | #else | |
1092 | static inline void mousedev_psaux_register(void) { } | |
1093 | static inline void mousedev_psaux_unregister(void) { } | |
1da177e4 LT |
1094 | #endif |
1095 | ||
1096 | static int __init mousedev_init(void) | |
1097 | { | |
4263cf0f DT |
1098 | int error; |
1099 | ||
9657d75c DT |
1100 | mousedev_mix = mousedev_create(NULL, &mousedev_handler, MOUSEDEV_MIX); |
1101 | if (IS_ERR(mousedev_mix)) | |
1102 | return PTR_ERR(mousedev_mix); | |
1103 | ||
4263cf0f | 1104 | error = input_register_handler(&mousedev_handler); |
9657d75c DT |
1105 | if (error) { |
1106 | mousedev_destroy(mousedev_mix); | |
4263cf0f | 1107 | return error; |
4263cf0f | 1108 | } |
1da177e4 | 1109 | |
a2cb1191 | 1110 | mousedev_psaux_register(); |
1da177e4 | 1111 | |
da0c4901 | 1112 | pr_info("PS/2 mouse device common for all mice\n"); |
1da177e4 LT |
1113 | |
1114 | return 0; | |
1115 | } | |
1116 | ||
1117 | static void __exit mousedev_exit(void) | |
1118 | { | |
a2cb1191 | 1119 | mousedev_psaux_unregister(); |
1da177e4 | 1120 | input_unregister_handler(&mousedev_handler); |
9657d75c | 1121 | mousedev_destroy(mousedev_mix); |
1da177e4 LT |
1122 | } |
1123 | ||
1124 | module_init(mousedev_init); | |
1125 | module_exit(mousedev_exit); |