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 |
c91cb7a7 DT |
15 | #define MOUSEDEV_MINORS 31 |
16 | #define MOUSEDEV_MIX 63 | |
1da177e4 | 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> | |
7f8d4cad | 27 | #include <linux/cdev.h> |
987a6c02 | 28 | #include <linux/kernel.h> |
1da177e4 LT |
29 | |
30 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
31 | MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces"); | |
32 | MODULE_LICENSE("GPL"); | |
33 | ||
34 | #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X | |
35 | #define CONFIG_INPUT_MOUSEDEV_SCREEN_X 1024 | |
36 | #endif | |
37 | #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y | |
38 | #define CONFIG_INPUT_MOUSEDEV_SCREEN_Y 768 | |
39 | #endif | |
40 | ||
41 | static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X; | |
84c12b24 | 42 | module_param(xres, uint, 0644); |
1da177e4 LT |
43 | MODULE_PARM_DESC(xres, "Horizontal screen resolution"); |
44 | ||
45 | static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y; | |
84c12b24 | 46 | module_param(yres, uint, 0644); |
1da177e4 LT |
47 | MODULE_PARM_DESC(yres, "Vertical screen resolution"); |
48 | ||
49 | static unsigned tap_time = 200; | |
84c12b24 | 50 | module_param(tap_time, uint, 0644); |
1da177e4 LT |
51 | MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)"); |
52 | ||
53 | struct mousedev_hw_data { | |
54 | int dx, dy, dz; | |
55 | int x, y; | |
56 | int abs_event; | |
57 | unsigned long buttons; | |
58 | }; | |
59 | ||
60 | struct mousedev { | |
1da177e4 | 61 | int open; |
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; |
7f8d4cad | 68 | struct cdev cdev; |
20da92de | 69 | bool exist; |
7f8d4cad | 70 | bool is_mixdev; |
1da177e4 | 71 | |
d542ed82 | 72 | struct list_head mixdev_node; |
3376b8b7 | 73 | bool opened_by_mixdev; |
d542ed82 | 74 | |
1da177e4 LT |
75 | struct mousedev_hw_data packet; |
76 | unsigned int pkt_count; | |
77 | int old_x[4], old_y[4]; | |
78 | int frac_dx, frac_dy; | |
79 | unsigned long touch; | |
80 | }; | |
81 | ||
82 | enum mousedev_emul { | |
83 | MOUSEDEV_EMUL_PS2, | |
84 | MOUSEDEV_EMUL_IMPS, | |
85 | MOUSEDEV_EMUL_EXPS | |
86 | }; | |
87 | ||
88 | struct mousedev_motion { | |
89 | int dx, dy, dz; | |
90 | unsigned long buttons; | |
91 | }; | |
92 | ||
93 | #define PACKET_QUEUE_LEN 16 | |
d0ffb9be | 94 | struct mousedev_client { |
1da177e4 LT |
95 | struct fasync_struct *fasync; |
96 | struct mousedev *mousedev; | |
97 | struct list_head node; | |
98 | ||
99 | struct mousedev_motion packets[PACKET_QUEUE_LEN]; | |
100 | unsigned int head, tail; | |
101 | spinlock_t packet_lock; | |
102 | int pos_x, pos_y; | |
103 | ||
104 | signed char ps2[6]; | |
105 | unsigned char ready, buffer, bufsiz; | |
106 | unsigned char imexseq, impsseq; | |
107 | enum mousedev_emul mode; | |
c1e4c8d3 | 108 | unsigned long last_buttons; |
1da177e4 LT |
109 | }; |
110 | ||
111 | #define MOUSEDEV_SEQ_LEN 6 | |
112 | ||
113 | static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 }; | |
114 | static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 }; | |
115 | ||
9657d75c | 116 | static struct mousedev *mousedev_mix; |
d542ed82 | 117 | static LIST_HEAD(mousedev_mix_list); |
1da177e4 | 118 | |
464b2415 DT |
119 | static void mixdev_open_devices(void); |
120 | static void mixdev_close_devices(void); | |
121 | ||
1da177e4 LT |
122 | #define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03]) |
123 | #define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03]) | |
124 | ||
464b2415 DT |
125 | static void mousedev_touchpad_event(struct input_dev *dev, |
126 | struct mousedev *mousedev, | |
127 | unsigned int code, int value) | |
1da177e4 LT |
128 | { |
129 | int size, tmp; | |
130 | enum { FRACTION_DENOM = 128 }; | |
131 | ||
0d9d93c4 | 132 | switch (code) { |
1da177e4 | 133 | |
464b2415 | 134 | case ABS_X: |
987a6c02 | 135 | |
464b2415 DT |
136 | fx(0) = value; |
137 | if (mousedev->touch && mousedev->pkt_count >= 2) { | |
268ba5c0 CF |
138 | size = input_abs_get_max(dev, ABS_X) - |
139 | input_abs_get_min(dev, ABS_X); | |
464b2415 DT |
140 | if (size == 0) |
141 | size = 256 * 2; | |
987a6c02 | 142 | |
464b2415 DT |
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) { | |
987a6c02 | 154 | /* use X size for ABS_Y to keep the same scale */ |
268ba5c0 CF |
155 | size = input_abs_get_max(dev, ABS_X) - |
156 | input_abs_get_min(dev, ABS_X); | |
464b2415 DT |
157 | if (size == 0) |
158 | size = 256 * 2; | |
987a6c02 | 159 | |
464b2415 DT |
160 | tmp = -((value - fy(2)) * 256 * FRACTION_DENOM) / size; |
161 | tmp += mousedev->frac_dy; | |
162 | mousedev->packet.dy = tmp / FRACTION_DENOM; | |
163 | mousedev->frac_dy = tmp - | |
164 | mousedev->packet.dy * FRACTION_DENOM; | |
165 | } | |
166 | break; | |
1da177e4 LT |
167 | } |
168 | } | |
169 | ||
464b2415 DT |
170 | static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, |
171 | unsigned int code, int value) | |
1da177e4 | 172 | { |
987a6c02 | 173 | int min, max, size; |
1da177e4 LT |
174 | |
175 | switch (code) { | |
1da177e4 | 176 | |
464b2415 | 177 | case ABS_X: |
987a6c02 DM |
178 | min = input_abs_get_min(dev, ABS_X); |
179 | max = input_abs_get_max(dev, ABS_X); | |
180 | ||
181 | size = max - min; | |
464b2415 DT |
182 | if (size == 0) |
183 | size = xres ? : 1; | |
987a6c02 | 184 | |
8c127f07 | 185 | value = clamp(value, min, max); |
987a6c02 DM |
186 | |
187 | mousedev->packet.x = ((value - min) * xres) / size; | |
464b2415 DT |
188 | mousedev->packet.abs_event = 1; |
189 | break; | |
190 | ||
191 | case ABS_Y: | |
987a6c02 DM |
192 | min = input_abs_get_min(dev, ABS_Y); |
193 | max = input_abs_get_max(dev, ABS_Y); | |
194 | ||
195 | size = max - min; | |
464b2415 DT |
196 | if (size == 0) |
197 | size = yres ? : 1; | |
987a6c02 | 198 | |
8c127f07 | 199 | value = clamp(value, min, max); |
987a6c02 DM |
200 | |
201 | mousedev->packet.y = yres - ((value - min) * yres) / size; | |
464b2415 DT |
202 | mousedev->packet.abs_event = 1; |
203 | break; | |
1da177e4 LT |
204 | } |
205 | } | |
206 | ||
464b2415 DT |
207 | static void mousedev_rel_event(struct mousedev *mousedev, |
208 | unsigned int code, int value) | |
1da177e4 LT |
209 | { |
210 | switch (code) { | |
464b2415 DT |
211 | case REL_X: |
212 | mousedev->packet.dx += value; | |
213 | break; | |
214 | ||
215 | case REL_Y: | |
216 | mousedev->packet.dy -= value; | |
217 | break; | |
218 | ||
219 | case REL_WHEEL: | |
220 | mousedev->packet.dz -= value; | |
221 | break; | |
1da177e4 LT |
222 | } |
223 | } | |
224 | ||
464b2415 DT |
225 | static void mousedev_key_event(struct mousedev *mousedev, |
226 | unsigned int code, int value) | |
1da177e4 LT |
227 | { |
228 | int index; | |
229 | ||
230 | switch (code) { | |
464b2415 DT |
231 | |
232 | case BTN_TOUCH: | |
233 | case BTN_0: | |
234 | case BTN_LEFT: index = 0; break; | |
235 | ||
236 | case BTN_STYLUS: | |
237 | case BTN_1: | |
238 | case BTN_RIGHT: index = 1; break; | |
239 | ||
240 | case BTN_2: | |
241 | case BTN_FORWARD: | |
242 | case BTN_STYLUS2: | |
243 | case BTN_MIDDLE: index = 2; break; | |
244 | ||
245 | case BTN_3: | |
246 | case BTN_BACK: | |
247 | case BTN_SIDE: index = 3; break; | |
248 | ||
249 | case BTN_4: | |
250 | case BTN_EXTRA: index = 4; break; | |
251 | ||
252 | default: return; | |
1da177e4 LT |
253 | } |
254 | ||
255 | if (value) { | |
256 | set_bit(index, &mousedev->packet.buttons); | |
9657d75c | 257 | set_bit(index, &mousedev_mix->packet.buttons); |
1da177e4 LT |
258 | } else { |
259 | clear_bit(index, &mousedev->packet.buttons); | |
9657d75c | 260 | clear_bit(index, &mousedev_mix->packet.buttons); |
1da177e4 LT |
261 | } |
262 | } | |
263 | ||
464b2415 DT |
264 | static void mousedev_notify_readers(struct mousedev *mousedev, |
265 | struct mousedev_hw_data *packet) | |
1da177e4 | 266 | { |
d0ffb9be | 267 | struct mousedev_client *client; |
1da177e4 | 268 | struct mousedev_motion *p; |
464b2415 | 269 | unsigned int new_head; |
8121152c | 270 | int wake_readers = 0; |
1da177e4 | 271 | |
82ba56c2 | 272 | rcu_read_lock(); |
464b2415 DT |
273 | list_for_each_entry_rcu(client, &mousedev->client_list, node) { |
274 | ||
275 | /* Just acquire the lock, interrupts already disabled */ | |
276 | spin_lock(&client->packet_lock); | |
1da177e4 | 277 | |
d0ffb9be DT |
278 | p = &client->packets[client->head]; |
279 | if (client->ready && p->buttons != mousedev->packet.buttons) { | |
464b2415 | 280 | new_head = (client->head + 1) % PACKET_QUEUE_LEN; |
d0ffb9be DT |
281 | if (new_head != client->tail) { |
282 | p = &client->packets[client->head = new_head]; | |
1da177e4 LT |
283 | memset(p, 0, sizeof(struct mousedev_motion)); |
284 | } | |
285 | } | |
286 | ||
287 | if (packet->abs_event) { | |
d0ffb9be DT |
288 | p->dx += packet->x - client->pos_x; |
289 | p->dy += packet->y - client->pos_y; | |
290 | client->pos_x = packet->x; | |
291 | client->pos_y = packet->y; | |
1da177e4 LT |
292 | } |
293 | ||
d0ffb9be | 294 | client->pos_x += packet->dx; |
464b2415 DT |
295 | client->pos_x = client->pos_x < 0 ? |
296 | 0 : (client->pos_x >= xres ? xres : client->pos_x); | |
d0ffb9be | 297 | client->pos_y += packet->dy; |
464b2415 DT |
298 | client->pos_y = client->pos_y < 0 ? |
299 | 0 : (client->pos_y >= yres ? yres : client->pos_y); | |
1da177e4 LT |
300 | |
301 | p->dx += packet->dx; | |
302 | p->dy += packet->dy; | |
303 | p->dz += packet->dz; | |
304 | p->buttons = mousedev->packet.buttons; | |
305 | ||
464b2415 DT |
306 | if (p->dx || p->dy || p->dz || |
307 | p->buttons != client->last_buttons) | |
d0ffb9be | 308 | client->ready = 1; |
1da177e4 | 309 | |
464b2415 | 310 | spin_unlock(&client->packet_lock); |
c1e4c8d3 | 311 | |
d0ffb9be DT |
312 | if (client->ready) { |
313 | kill_fasync(&client->fasync, SIGIO, POLL_IN); | |
8121152c DT |
314 | wake_readers = 1; |
315 | } | |
1da177e4 | 316 | } |
82ba56c2 | 317 | rcu_read_unlock(); |
1da177e4 | 318 | |
8121152c DT |
319 | if (wake_readers) |
320 | wake_up_interruptible(&mousedev->wait); | |
1da177e4 LT |
321 | } |
322 | ||
323 | static void mousedev_touchpad_touch(struct mousedev *mousedev, int value) | |
324 | { | |
325 | if (!value) { | |
326 | if (mousedev->touch && | |
464b2415 DT |
327 | time_before(jiffies, |
328 | mousedev->touch + msecs_to_jiffies(tap_time))) { | |
1da177e4 LT |
329 | /* |
330 | * Toggle left button to emulate tap. | |
331 | * We rely on the fact that mousedev_mix always has 0 | |
332 | * motion packet so we won't mess current position. | |
333 | */ | |
334 | set_bit(0, &mousedev->packet.buttons); | |
9657d75c DT |
335 | set_bit(0, &mousedev_mix->packet.buttons); |
336 | mousedev_notify_readers(mousedev, &mousedev_mix->packet); | |
464b2415 DT |
337 | mousedev_notify_readers(mousedev_mix, |
338 | &mousedev_mix->packet); | |
1da177e4 | 339 | clear_bit(0, &mousedev->packet.buttons); |
9657d75c | 340 | clear_bit(0, &mousedev_mix->packet.buttons); |
1da177e4 LT |
341 | } |
342 | mousedev->touch = mousedev->pkt_count = 0; | |
343 | mousedev->frac_dx = 0; | |
344 | mousedev->frac_dy = 0; | |
1e0afb28 DT |
345 | |
346 | } else if (!mousedev->touch) | |
347 | mousedev->touch = jiffies; | |
1da177e4 LT |
348 | } |
349 | ||
464b2415 DT |
350 | static void mousedev_event(struct input_handle *handle, |
351 | unsigned int type, unsigned int code, int value) | |
1da177e4 LT |
352 | { |
353 | struct mousedev *mousedev = handle->private; | |
354 | ||
355 | switch (type) { | |
1da177e4 | 356 | |
464b2415 DT |
357 | case EV_ABS: |
358 | /* Ignore joysticks */ | |
359 | if (test_bit(BTN_TRIGGER, handle->dev->keybit)) | |
360 | return; | |
1da177e4 | 361 | |
464b2415 DT |
362 | if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) |
363 | mousedev_touchpad_event(handle->dev, | |
364 | mousedev, code, value); | |
365 | else | |
366 | mousedev_abs_event(handle->dev, mousedev, code, value); | |
1da177e4 | 367 | |
464b2415 | 368 | break; |
1da177e4 | 369 | |
464b2415 DT |
370 | case EV_REL: |
371 | mousedev_rel_event(mousedev, code, value); | |
372 | break; | |
1da177e4 | 373 | |
464b2415 DT |
374 | case EV_KEY: |
375 | if (value != 2) { | |
376 | if (code == BTN_TOUCH && | |
377 | test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) | |
378 | mousedev_touchpad_touch(mousedev, value); | |
379 | else | |
380 | mousedev_key_event(mousedev, code, value); | |
381 | } | |
382 | break; | |
383 | ||
384 | case EV_SYN: | |
385 | if (code == SYN_REPORT) { | |
386 | if (mousedev->touch) { | |
387 | mousedev->pkt_count++; | |
388 | /* | |
389 | * Input system eats duplicate events, | |
390 | * but we need all of them to do correct | |
391 | * averaging so apply present one forward | |
392 | */ | |
393 | fx(0) = fx(1); | |
394 | fy(0) = fy(1); | |
1da177e4 | 395 | } |
464b2415 DT |
396 | |
397 | mousedev_notify_readers(mousedev, &mousedev->packet); | |
398 | mousedev_notify_readers(mousedev_mix, &mousedev->packet); | |
399 | ||
400 | mousedev->packet.dx = mousedev->packet.dy = | |
401 | mousedev->packet.dz = 0; | |
402 | mousedev->packet.abs_event = 0; | |
403 | } | |
404 | break; | |
1da177e4 LT |
405 | } |
406 | } | |
407 | ||
408 | static int mousedev_fasync(int fd, struct file *file, int on) | |
409 | { | |
d0ffb9be | 410 | struct mousedev_client *client = file->private_data; |
1e0afb28 | 411 | |
60aa4924 | 412 | return fasync_helper(fd, file, on, &client->fasync); |
1da177e4 LT |
413 | } |
414 | ||
9657d75c | 415 | static void mousedev_free(struct device *dev) |
1da177e4 | 416 | { |
9657d75c DT |
417 | struct mousedev *mousedev = container_of(dev, struct mousedev, dev); |
418 | ||
a7097ff8 | 419 | input_put_device(mousedev->handle.dev); |
1da177e4 LT |
420 | kfree(mousedev); |
421 | } | |
422 | ||
464b2415 | 423 | static int mousedev_open_device(struct mousedev *mousedev) |
1da177e4 | 424 | { |
464b2415 | 425 | int retval; |
1da177e4 | 426 | |
464b2415 DT |
427 | retval = mutex_lock_interruptible(&mousedev->mutex); |
428 | if (retval) | |
429 | return retval; | |
d542ed82 | 430 | |
7f8d4cad | 431 | if (mousedev->is_mixdev) |
464b2415 DT |
432 | mixdev_open_devices(); |
433 | else if (!mousedev->exist) | |
434 | retval = -ENODEV; | |
06445014 | 435 | else if (!mousedev->open++) { |
464b2415 | 436 | retval = input_open_device(&mousedev->handle); |
06445014 ON |
437 | if (retval) |
438 | mousedev->open--; | |
439 | } | |
d542ed82 | 440 | |
464b2415 DT |
441 | mutex_unlock(&mousedev->mutex); |
442 | return retval; | |
d542ed82 DT |
443 | } |
444 | ||
464b2415 | 445 | static void mousedev_close_device(struct mousedev *mousedev) |
d542ed82 | 446 | { |
464b2415 | 447 | mutex_lock(&mousedev->mutex); |
d542ed82 | 448 | |
7f8d4cad | 449 | if (mousedev->is_mixdev) |
464b2415 DT |
450 | mixdev_close_devices(); |
451 | else if (mousedev->exist && !--mousedev->open) | |
452 | input_close_device(&mousedev->handle); | |
453 | ||
454 | mutex_unlock(&mousedev->mutex); | |
d542ed82 DT |
455 | } |
456 | ||
464b2415 DT |
457 | /* |
458 | * Open all available devices so they can all be multiplexed in one. | |
459 | * stream. Note that this function is called with mousedev_mix->mutex | |
460 | * held. | |
461 | */ | |
d542ed82 DT |
462 | static void mixdev_open_devices(void) |
463 | { | |
464 | struct mousedev *mousedev; | |
465 | ||
9657d75c DT |
466 | if (mousedev_mix->open++) |
467 | return; | |
468 | ||
d542ed82 | 469 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { |
3376b8b7 | 470 | if (!mousedev->opened_by_mixdev) { |
464b2415 DT |
471 | if (mousedev_open_device(mousedev)) |
472 | continue; | |
d542ed82 | 473 | |
3376b8b7 | 474 | mousedev->opened_by_mixdev = true; |
1da177e4 LT |
475 | } |
476 | } | |
1da177e4 LT |
477 | } |
478 | ||
464b2415 DT |
479 | /* |
480 | * Close all devices that were opened as part of multiplexed | |
481 | * device. Note that this function is called with mousedev_mix->mutex | |
482 | * held. | |
483 | */ | |
d542ed82 | 484 | static void mixdev_close_devices(void) |
1da177e4 | 485 | { |
9657d75c | 486 | struct mousedev *mousedev; |
d542ed82 | 487 | |
9657d75c DT |
488 | if (--mousedev_mix->open) |
489 | return; | |
490 | ||
491 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { | |
3376b8b7 DT |
492 | if (mousedev->opened_by_mixdev) { |
493 | mousedev->opened_by_mixdev = false; | |
464b2415 | 494 | mousedev_close_device(mousedev); |
1da177e4 LT |
495 | } |
496 | } | |
1da177e4 LT |
497 | } |
498 | ||
464b2415 DT |
499 | |
500 | static void mousedev_attach_client(struct mousedev *mousedev, | |
501 | struct mousedev_client *client) | |
502 | { | |
503 | spin_lock(&mousedev->client_lock); | |
504 | list_add_tail_rcu(&client->node, &mousedev->client_list); | |
505 | spin_unlock(&mousedev->client_lock); | |
464b2415 DT |
506 | } |
507 | ||
508 | static void mousedev_detach_client(struct mousedev *mousedev, | |
509 | struct mousedev_client *client) | |
510 | { | |
511 | spin_lock(&mousedev->client_lock); | |
512 | list_del_rcu(&client->node); | |
513 | spin_unlock(&mousedev->client_lock); | |
82ba56c2 | 514 | synchronize_rcu(); |
464b2415 DT |
515 | } |
516 | ||
d0ffb9be | 517 | static int mousedev_release(struct inode *inode, struct file *file) |
1da177e4 | 518 | { |
d0ffb9be DT |
519 | struct mousedev_client *client = file->private_data; |
520 | struct mousedev *mousedev = client->mousedev; | |
1da177e4 | 521 | |
464b2415 | 522 | mousedev_detach_client(mousedev, client); |
d0ffb9be | 523 | kfree(client); |
1da177e4 | 524 | |
464b2415 | 525 | mousedev_close_device(mousedev); |
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 | |
536 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
537 | if (imajor(inode) == MISC_MAJOR) | |
7f8d4cad | 538 | mousedev = mousedev_mix; |
1da177e4 LT |
539 | else |
540 | #endif | |
7f8d4cad | 541 | mousedev = container_of(inode->i_cdev, struct mousedev, cdev); |
1da177e4 | 542 | |
d0ffb9be | 543 | client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL); |
7f8d4cad DT |
544 | if (!client) |
545 | return -ENOMEM; | |
1da177e4 | 546 | |
d0ffb9be DT |
547 | spin_lock_init(&client->packet_lock); |
548 | client->pos_x = xres / 2; | |
549 | client->pos_y = yres / 2; | |
550 | client->mousedev = mousedev; | |
464b2415 | 551 | mousedev_attach_client(mousedev, client); |
1da177e4 | 552 | |
464b2415 DT |
553 | error = mousedev_open_device(mousedev); |
554 | if (error) | |
555 | goto err_free_client; | |
1da177e4 | 556 | |
d0ffb9be | 557 | file->private_data = client; |
0124be49 | 558 | nonseekable_open(inode, file); |
7f8d4cad | 559 | |
1da177e4 | 560 | return 0; |
9657d75c DT |
561 | |
562 | err_free_client: | |
464b2415 | 563 | mousedev_detach_client(mousedev, client); |
9657d75c | 564 | kfree(client); |
9657d75c | 565 | return error; |
1da177e4 LT |
566 | } |
567 | ||
568 | static inline int mousedev_limit_delta(int delta, int limit) | |
569 | { | |
570 | return delta > limit ? limit : (delta < -limit ? -limit : delta); | |
571 | } | |
572 | ||
464b2415 DT |
573 | static void mousedev_packet(struct mousedev_client *client, |
574 | signed char *ps2_data) | |
1da177e4 | 575 | { |
464b2415 | 576 | struct mousedev_motion *p = &client->packets[client->tail]; |
1da177e4 | 577 | |
464b2415 DT |
578 | ps2_data[0] = 0x08 | |
579 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07); | |
1da177e4 LT |
580 | ps2_data[1] = mousedev_limit_delta(p->dx, 127); |
581 | ps2_data[2] = mousedev_limit_delta(p->dy, 127); | |
582 | p->dx -= ps2_data[1]; | |
583 | p->dy -= ps2_data[2]; | |
584 | ||
d0ffb9be | 585 | switch (client->mode) { |
464b2415 DT |
586 | case MOUSEDEV_EMUL_EXPS: |
587 | ps2_data[3] = mousedev_limit_delta(p->dz, 7); | |
588 | p->dz -= ps2_data[3]; | |
589 | ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1); | |
590 | client->bufsiz = 4; | |
591 | break; | |
592 | ||
593 | case MOUSEDEV_EMUL_IMPS: | |
594 | ps2_data[0] |= | |
595 | ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); | |
596 | ps2_data[3] = mousedev_limit_delta(p->dz, 127); | |
597 | p->dz -= ps2_data[3]; | |
598 | client->bufsiz = 4; | |
599 | break; | |
600 | ||
601 | case MOUSEDEV_EMUL_PS2: | |
602 | default: | |
603 | ps2_data[0] |= | |
604 | ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); | |
605 | p->dz = 0; | |
606 | client->bufsiz = 3; | |
607 | break; | |
1da177e4 LT |
608 | } |
609 | ||
610 | if (!p->dx && !p->dy && !p->dz) { | |
d0ffb9be DT |
611 | if (client->tail == client->head) { |
612 | client->ready = 0; | |
613 | client->last_buttons = p->buttons; | |
c1e4c8d3 | 614 | } else |
d0ffb9be | 615 | client->tail = (client->tail + 1) % PACKET_QUEUE_LEN; |
1da177e4 | 616 | } |
1da177e4 LT |
617 | } |
618 | ||
464b2415 DT |
619 | static void mousedev_generate_response(struct mousedev_client *client, |
620 | int command) | |
621 | { | |
622 | client->ps2[0] = 0xfa; /* ACK */ | |
1da177e4 | 623 | |
464b2415 DT |
624 | switch (command) { |
625 | ||
626 | case 0xeb: /* Poll */ | |
627 | mousedev_packet(client, &client->ps2[1]); | |
628 | client->bufsiz++; /* account for leading ACK */ | |
629 | break; | |
630 | ||
631 | case 0xf2: /* Get ID */ | |
632 | switch (client->mode) { | |
633 | case MOUSEDEV_EMUL_PS2: | |
634 | client->ps2[1] = 0; | |
635 | break; | |
636 | case MOUSEDEV_EMUL_IMPS: | |
637 | client->ps2[1] = 3; | |
638 | break; | |
639 | case MOUSEDEV_EMUL_EXPS: | |
640 | client->ps2[1] = 4; | |
641 | break; | |
642 | } | |
643 | client->bufsiz = 2; | |
644 | break; | |
645 | ||
646 | case 0xe9: /* Get info */ | |
647 | client->ps2[1] = 0x60; client->ps2[2] = 3; client->ps2[3] = 200; | |
648 | client->bufsiz = 4; | |
649 | break; | |
650 | ||
651 | case 0xff: /* Reset */ | |
652 | client->impsseq = client->imexseq = 0; | |
653 | client->mode = MOUSEDEV_EMUL_PS2; | |
654 | client->ps2[1] = 0xaa; client->ps2[2] = 0x00; | |
655 | client->bufsiz = 3; | |
656 | break; | |
657 | ||
658 | default: | |
659 | client->bufsiz = 1; | |
660 | break; | |
661 | } | |
662 | client->buffer = client->bufsiz; | |
663 | } | |
664 | ||
665 | static ssize_t mousedev_write(struct file *file, const char __user *buffer, | |
666 | size_t count, loff_t *ppos) | |
1da177e4 | 667 | { |
d0ffb9be | 668 | struct mousedev_client *client = file->private_data; |
1da177e4 LT |
669 | unsigned char c; |
670 | unsigned int i; | |
671 | ||
672 | for (i = 0; i < count; i++) { | |
673 | ||
674 | if (get_user(c, buffer + i)) | |
675 | return -EFAULT; | |
676 | ||
464b2415 DT |
677 | spin_lock_irq(&client->packet_lock); |
678 | ||
d0ffb9be DT |
679 | if (c == mousedev_imex_seq[client->imexseq]) { |
680 | if (++client->imexseq == MOUSEDEV_SEQ_LEN) { | |
681 | client->imexseq = 0; | |
682 | client->mode = MOUSEDEV_EMUL_EXPS; | |
1da177e4 | 683 | } |
1e0afb28 | 684 | } else |
d0ffb9be | 685 | client->imexseq = 0; |
1da177e4 | 686 | |
d0ffb9be DT |
687 | if (c == mousedev_imps_seq[client->impsseq]) { |
688 | if (++client->impsseq == MOUSEDEV_SEQ_LEN) { | |
689 | client->impsseq = 0; | |
690 | client->mode = MOUSEDEV_EMUL_IMPS; | |
1da177e4 | 691 | } |
1e0afb28 | 692 | } else |
d0ffb9be | 693 | client->impsseq = 0; |
1da177e4 | 694 | |
464b2415 | 695 | mousedev_generate_response(client, c); |
1da177e4 | 696 | |
464b2415 | 697 | spin_unlock_irq(&client->packet_lock); |
1da177e4 LT |
698 | } |
699 | ||
d0ffb9be | 700 | kill_fasync(&client->fasync, SIGIO, POLL_IN); |
d0ffb9be | 701 | wake_up_interruptible(&client->mousedev->wait); |
1da177e4 LT |
702 | |
703 | return count; | |
704 | } | |
705 | ||
464b2415 DT |
706 | static ssize_t mousedev_read(struct file *file, char __user *buffer, |
707 | size_t count, loff_t *ppos) | |
1da177e4 | 708 | { |
d0ffb9be | 709 | struct mousedev_client *client = file->private_data; |
464b2415 DT |
710 | struct mousedev *mousedev = client->mousedev; |
711 | signed char data[sizeof(client->ps2)]; | |
1da177e4 LT |
712 | int retval = 0; |
713 | ||
464b2415 DT |
714 | if (!client->ready && !client->buffer && mousedev->exist && |
715 | (file->f_flags & O_NONBLOCK)) | |
1da177e4 LT |
716 | return -EAGAIN; |
717 | ||
464b2415 DT |
718 | retval = wait_event_interruptible(mousedev->wait, |
719 | !mousedev->exist || client->ready || client->buffer); | |
1da177e4 LT |
720 | if (retval) |
721 | return retval; | |
722 | ||
464b2415 | 723 | if (!mousedev->exist) |
1da177e4 LT |
724 | return -ENODEV; |
725 | ||
464b2415 DT |
726 | spin_lock_irq(&client->packet_lock); |
727 | ||
d0ffb9be DT |
728 | if (!client->buffer && client->ready) { |
729 | mousedev_packet(client, client->ps2); | |
730 | client->buffer = client->bufsiz; | |
1da177e4 LT |
731 | } |
732 | ||
d0ffb9be DT |
733 | if (count > client->buffer) |
734 | count = client->buffer; | |
1da177e4 | 735 | |
464b2415 | 736 | memcpy(data, client->ps2 + client->bufsiz - client->buffer, count); |
d0ffb9be | 737 | client->buffer -= count; |
1da177e4 | 738 | |
464b2415 DT |
739 | spin_unlock_irq(&client->packet_lock); |
740 | ||
741 | if (copy_to_user(buffer, data, count)) | |
1da177e4 LT |
742 | return -EFAULT; |
743 | ||
744 | return count; | |
745 | } | |
746 | ||
747 | /* No kernel lock - fine */ | |
748 | static unsigned int mousedev_poll(struct file *file, poll_table *wait) | |
749 | { | |
d0ffb9be DT |
750 | struct mousedev_client *client = file->private_data; |
751 | struct mousedev *mousedev = client->mousedev; | |
4d4bf995 | 752 | unsigned int mask; |
1e0afb28 | 753 | |
d0ffb9be | 754 | poll_wait(file, &mousedev->wait, wait); |
4d4bf995 JM |
755 | |
756 | mask = mousedev->exist ? POLLOUT | POLLWRNORM : POLLHUP | POLLERR; | |
757 | if (client->ready || client->buffer) | |
758 | mask |= POLLIN | POLLRDNORM; | |
759 | ||
760 | return mask; | |
1da177e4 LT |
761 | } |
762 | ||
66e66118 | 763 | static const struct file_operations mousedev_fops = { |
1c74585e DT |
764 | .owner = THIS_MODULE, |
765 | .read = mousedev_read, | |
766 | .write = mousedev_write, | |
767 | .poll = mousedev_poll, | |
768 | .open = mousedev_open, | |
769 | .release = mousedev_release, | |
770 | .fasync = mousedev_fasync, | |
771 | .llseek = noop_llseek, | |
1da177e4 LT |
772 | }; |
773 | ||
464b2415 DT |
774 | /* |
775 | * Mark device non-existent. This disables writes, ioctls and | |
776 | * prevents new users from opening the device. Already posted | |
777 | * blocking reads will stay, however new ones will fail. | |
778 | */ | |
779 | static void mousedev_mark_dead(struct mousedev *mousedev) | |
780 | { | |
781 | mutex_lock(&mousedev->mutex); | |
20da92de | 782 | mousedev->exist = false; |
464b2415 DT |
783 | mutex_unlock(&mousedev->mutex); |
784 | } | |
785 | ||
786 | /* | |
787 | * Wake up users waiting for IO so they can disconnect from | |
788 | * dead device. | |
789 | */ | |
790 | static void mousedev_hangup(struct mousedev *mousedev) | |
791 | { | |
792 | struct mousedev_client *client; | |
793 | ||
794 | spin_lock(&mousedev->client_lock); | |
795 | list_for_each_entry(client, &mousedev->client_list, node) | |
796 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
797 | spin_unlock(&mousedev->client_lock); | |
798 | ||
799 | wake_up_interruptible(&mousedev->wait); | |
800 | } | |
801 | ||
802 | static void mousedev_cleanup(struct mousedev *mousedev) | |
803 | { | |
804 | struct input_handle *handle = &mousedev->handle; | |
805 | ||
806 | mousedev_mark_dead(mousedev); | |
807 | mousedev_hangup(mousedev); | |
7f8d4cad DT |
808 | |
809 | cdev_del(&mousedev->cdev); | |
464b2415 DT |
810 | |
811 | /* mousedev is marked dead so no one else accesses mousedev->open */ | |
812 | if (mousedev->open) | |
813 | input_close_device(handle); | |
814 | } | |
815 | ||
7f8d4cad DT |
816 | static int mousedev_reserve_minor(bool mixdev) |
817 | { | |
818 | int minor; | |
819 | ||
820 | if (mixdev) { | |
821 | minor = input_get_new_minor(MOUSEDEV_MIX, 1, false); | |
822 | if (minor < 0) | |
823 | pr_err("failed to reserve mixdev minor: %d\n", minor); | |
824 | } else { | |
825 | minor = input_get_new_minor(MOUSEDEV_MINOR_BASE, | |
826 | MOUSEDEV_MINORS, true); | |
827 | if (minor < 0) | |
828 | pr_err("failed to reserve new minor: %d\n", minor); | |
829 | } | |
830 | ||
831 | return minor; | |
832 | } | |
833 | ||
9657d75c DT |
834 | static struct mousedev *mousedev_create(struct input_dev *dev, |
835 | struct input_handler *handler, | |
7f8d4cad | 836 | bool mixdev) |
1da177e4 LT |
837 | { |
838 | struct mousedev *mousedev; | |
7f8d4cad | 839 | int minor; |
5b2a0826 | 840 | int error; |
1da177e4 | 841 | |
7f8d4cad DT |
842 | minor = mousedev_reserve_minor(mixdev); |
843 | if (minor < 0) { | |
844 | error = minor; | |
845 | goto err_out; | |
846 | } | |
847 | ||
5b2a0826 | 848 | mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL); |
9657d75c DT |
849 | if (!mousedev) { |
850 | error = -ENOMEM; | |
7f8d4cad | 851 | goto err_free_minor; |
9657d75c | 852 | } |
1da177e4 | 853 | |
d0ffb9be | 854 | INIT_LIST_HEAD(&mousedev->client_list); |
5b2a0826 | 855 | INIT_LIST_HEAD(&mousedev->mixdev_node); |
464b2415 DT |
856 | spin_lock_init(&mousedev->client_lock); |
857 | mutex_init(&mousedev->mutex); | |
858 | lockdep_set_subclass(&mousedev->mutex, | |
7f8d4cad | 859 | mixdev ? SINGLE_DEPTH_NESTING : 0); |
1da177e4 LT |
860 | init_waitqueue_head(&mousedev->wait); |
861 | ||
7f8d4cad | 862 | if (mixdev) { |
3d5cb60e | 863 | dev_set_name(&mousedev->dev, "mice"); |
7f8d4cad DT |
864 | } else { |
865 | int dev_no = minor; | |
866 | /* Normalize device number if it falls into legacy range */ | |
867 | if (dev_no < MOUSEDEV_MINOR_BASE + MOUSEDEV_MINORS) | |
868 | dev_no -= MOUSEDEV_MINOR_BASE; | |
869 | dev_set_name(&mousedev->dev, "mouse%d", dev_no); | |
870 | } | |
9657d75c | 871 | |
20da92de | 872 | mousedev->exist = true; |
7f8d4cad | 873 | mousedev->is_mixdev = mixdev; |
a7097ff8 | 874 | mousedev->handle.dev = input_get_device(dev); |
3d5cb60e | 875 | mousedev->handle.name = dev_name(&mousedev->dev); |
1da177e4 LT |
876 | mousedev->handle.handler = handler; |
877 | mousedev->handle.private = mousedev; | |
1da177e4 | 878 | |
9657d75c DT |
879 | mousedev->dev.class = &input_class; |
880 | if (dev) | |
881 | mousedev->dev.parent = &dev->dev; | |
7f8d4cad | 882 | mousedev->dev.devt = MKDEV(INPUT_MAJOR, minor); |
9657d75c DT |
883 | mousedev->dev.release = mousedev_free; |
884 | device_initialize(&mousedev->dev); | |
1da177e4 | 885 | |
7f8d4cad | 886 | if (!mixdev) { |
464b2415 DT |
887 | error = input_register_handle(&mousedev->handle); |
888 | if (error) | |
889 | goto err_free_mousedev; | |
890 | } | |
891 | ||
7f8d4cad | 892 | cdev_init(&mousedev->cdev, &mousedev_fops); |
4a215aad | 893 | mousedev->cdev.kobj.parent = &mousedev->dev.kobj; |
7f8d4cad | 894 | error = cdev_add(&mousedev->cdev, mousedev->dev.devt, 1); |
464b2415 DT |
895 | if (error) |
896 | goto err_unregister_handle; | |
5b2a0826 | 897 | |
9657d75c DT |
898 | error = device_add(&mousedev->dev); |
899 | if (error) | |
464b2415 | 900 | goto err_cleanup_mousedev; |
9657d75c DT |
901 | |
902 | return mousedev; | |
903 | ||
464b2415 DT |
904 | err_cleanup_mousedev: |
905 | mousedev_cleanup(mousedev); | |
906 | err_unregister_handle: | |
7f8d4cad | 907 | if (!mixdev) |
464b2415 | 908 | input_unregister_handle(&mousedev->handle); |
9657d75c DT |
909 | err_free_mousedev: |
910 | put_device(&mousedev->dev); | |
7f8d4cad DT |
911 | err_free_minor: |
912 | input_free_minor(minor); | |
9657d75c DT |
913 | err_out: |
914 | return ERR_PTR(error); | |
915 | } | |
916 | ||
917 | static void mousedev_destroy(struct mousedev *mousedev) | |
918 | { | |
9657d75c | 919 | device_del(&mousedev->dev); |
464b2415 | 920 | mousedev_cleanup(mousedev); |
7f8d4cad DT |
921 | input_free_minor(MINOR(mousedev->dev.devt)); |
922 | if (!mousedev->is_mixdev) | |
464b2415 DT |
923 | input_unregister_handle(&mousedev->handle); |
924 | put_device(&mousedev->dev); | |
925 | } | |
9657d75c | 926 | |
464b2415 DT |
927 | static int mixdev_add_device(struct mousedev *mousedev) |
928 | { | |
929 | int retval; | |
930 | ||
931 | retval = mutex_lock_interruptible(&mousedev_mix->mutex); | |
932 | if (retval) | |
933 | return retval; | |
934 | ||
935 | if (mousedev_mix->open) { | |
936 | retval = mousedev_open_device(mousedev); | |
937 | if (retval) | |
938 | goto out; | |
939 | ||
3376b8b7 | 940 | mousedev->opened_by_mixdev = true; |
5b2a0826 | 941 | } |
c9bcd582 | 942 | |
464b2415 DT |
943 | get_device(&mousedev->dev); |
944 | list_add_tail(&mousedev->mixdev_node, &mousedev_mix_list); | |
945 | ||
946 | out: | |
947 | mutex_unlock(&mousedev_mix->mutex); | |
948 | return retval; | |
949 | } | |
950 | ||
951 | static void mixdev_remove_device(struct mousedev *mousedev) | |
952 | { | |
953 | mutex_lock(&mousedev_mix->mutex); | |
954 | ||
3376b8b7 DT |
955 | if (mousedev->opened_by_mixdev) { |
956 | mousedev->opened_by_mixdev = false; | |
464b2415 DT |
957 | mousedev_close_device(mousedev); |
958 | } | |
959 | ||
960 | list_del_init(&mousedev->mixdev_node); | |
961 | mutex_unlock(&mousedev_mix->mutex); | |
962 | ||
9657d75c DT |
963 | put_device(&mousedev->dev); |
964 | } | |
965 | ||
464b2415 DT |
966 | static int mousedev_connect(struct input_handler *handler, |
967 | struct input_dev *dev, | |
9657d75c DT |
968 | const struct input_device_id *id) |
969 | { | |
970 | struct mousedev *mousedev; | |
9657d75c DT |
971 | int error; |
972 | ||
7f8d4cad | 973 | mousedev = mousedev_create(dev, handler, false); |
9657d75c DT |
974 | if (IS_ERR(mousedev)) |
975 | return PTR_ERR(mousedev); | |
5b2a0826 | 976 | |
d542ed82 | 977 | error = mixdev_add_device(mousedev); |
464b2415 DT |
978 | if (error) { |
979 | mousedev_destroy(mousedev); | |
980 | return error; | |
981 | } | |
1da177e4 | 982 | |
5b2a0826 | 983 | return 0; |
1da177e4 LT |
984 | } |
985 | ||
986 | static void mousedev_disconnect(struct input_handle *handle) | |
987 | { | |
988 | struct mousedev *mousedev = handle->private; | |
1da177e4 | 989 | |
d542ed82 | 990 | mixdev_remove_device(mousedev); |
9657d75c | 991 | mousedev_destroy(mousedev); |
1da177e4 LT |
992 | } |
993 | ||
66e66118 | 994 | static const struct input_device_id mousedev_ids[] = { |
1da177e4 | 995 | { |
464b2415 DT |
996 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
997 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
998 | INPUT_DEVICE_ID_MATCH_RELBIT, | |
7b19ada2 JS |
999 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) }, |
1000 | .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) }, | |
1001 | .relbit = { BIT_MASK(REL_X) | BIT_MASK(REL_Y) }, | |
464b2415 DT |
1002 | }, /* A mouse like device, at least one button, |
1003 | two relative axes */ | |
1da177e4 | 1004 | { |
464b2415 DT |
1005 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1006 | INPUT_DEVICE_ID_MATCH_RELBIT, | |
7b19ada2 JS |
1007 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) }, |
1008 | .relbit = { BIT_MASK(REL_WHEEL) }, | |
1da177e4 LT |
1009 | }, /* A separate scrollwheel */ |
1010 | { | |
464b2415 DT |
1011 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1012 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1013 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
1014 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
1015 | .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) }, | |
1016 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) }, | |
464b2415 DT |
1017 | }, /* A tablet like device, at least touch detection, |
1018 | two absolute axes */ | |
1da177e4 | 1019 | { |
464b2415 DT |
1020 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1021 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1022 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
1023 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
1024 | .keybit = { [BIT_WORD(BTN_TOOL_FINGER)] = | |
1025 | BIT_MASK(BTN_TOOL_FINGER) }, | |
1026 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) | | |
1027 | BIT_MASK(ABS_PRESSURE) | | |
1028 | BIT_MASK(ABS_TOOL_WIDTH) }, | |
1da177e4 | 1029 | }, /* A touchpad */ |
6724f934 MP |
1030 | { |
1031 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
1032 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1033 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
d182c10c | 1034 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
6724f934 MP |
1035 | .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) }, |
1036 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) }, | |
1037 | }, /* Mouse-like device with absolute X and Y but ordinary | |
1038 | clicks, like hp ILO2 High Performance mouse */ | |
1da177e4 | 1039 | |
d0ffb9be | 1040 | { }, /* Terminating entry */ |
1da177e4 LT |
1041 | }; |
1042 | ||
1043 | MODULE_DEVICE_TABLE(input, mousedev_ids); | |
1044 | ||
1045 | static struct input_handler mousedev_handler = { | |
1c74585e DT |
1046 | .event = mousedev_event, |
1047 | .connect = mousedev_connect, | |
1048 | .disconnect = mousedev_disconnect, | |
7f8d4cad | 1049 | .legacy_minors = true, |
1c74585e DT |
1050 | .minor = MOUSEDEV_MINOR_BASE, |
1051 | .name = "mousedev", | |
1052 | .id_table = mousedev_ids, | |
1da177e4 LT |
1053 | }; |
1054 | ||
1055 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
a2cb1191 DT |
1056 | #include <linux/miscdevice.h> |
1057 | ||
1da177e4 | 1058 | static struct miscdevice psaux_mouse = { |
a2cb1191 DT |
1059 | .minor = PSMOUSE_MINOR, |
1060 | .name = "psaux", | |
1061 | .fops = &mousedev_fops, | |
1da177e4 | 1062 | }; |
a2cb1191 DT |
1063 | |
1064 | static bool psaux_registered; | |
1065 | ||
1066 | static void __init mousedev_psaux_register(void) | |
1067 | { | |
1068 | int error; | |
1069 | ||
1070 | error = misc_register(&psaux_mouse); | |
1071 | if (error) | |
1072 | pr_warn("could not register psaux device, error: %d\n", | |
1073 | error); | |
1074 | else | |
1075 | psaux_registered = true; | |
1076 | } | |
1077 | ||
1078 | static void __exit mousedev_psaux_unregister(void) | |
1079 | { | |
1080 | if (psaux_registered) | |
1081 | misc_deregister(&psaux_mouse); | |
1082 | } | |
1083 | #else | |
1084 | static inline void mousedev_psaux_register(void) { } | |
1085 | static inline void mousedev_psaux_unregister(void) { } | |
1da177e4 LT |
1086 | #endif |
1087 | ||
1088 | static int __init mousedev_init(void) | |
1089 | { | |
4263cf0f DT |
1090 | int error; |
1091 | ||
7f8d4cad | 1092 | mousedev_mix = mousedev_create(NULL, &mousedev_handler, true); |
9657d75c DT |
1093 | if (IS_ERR(mousedev_mix)) |
1094 | return PTR_ERR(mousedev_mix); | |
1095 | ||
4263cf0f | 1096 | error = input_register_handler(&mousedev_handler); |
9657d75c DT |
1097 | if (error) { |
1098 | mousedev_destroy(mousedev_mix); | |
4263cf0f | 1099 | return error; |
4263cf0f | 1100 | } |
1da177e4 | 1101 | |
a2cb1191 | 1102 | mousedev_psaux_register(); |
1da177e4 | 1103 | |
da0c4901 | 1104 | pr_info("PS/2 mouse device common for all mice\n"); |
1da177e4 LT |
1105 | |
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | static void __exit mousedev_exit(void) | |
1110 | { | |
a2cb1191 | 1111 | mousedev_psaux_unregister(); |
1da177e4 | 1112 | input_unregister_handler(&mousedev_handler); |
9657d75c | 1113 | mousedev_destroy(mousedev_mix); |
1da177e4 LT |
1114 | } |
1115 | ||
1116 | module_init(mousedev_init); | |
1117 | module_exit(mousedev_exit); |