Commit | Line | Data |
---|---|---|
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 | |
dae1a432 | 18 | #include <linux/bitops.h> |
a99bbaf5 | 19 | #include <linux/sched.h> |
1da177e4 LT |
20 | #include <linux/slab.h> |
21 | #include <linux/poll.h> | |
22 | #include <linux/module.h> | |
1da177e4 LT |
23 | #include <linux/init.h> |
24 | #include <linux/input.h> | |
1da177e4 LT |
25 | #include <linux/random.h> |
26 | #include <linux/major.h> | |
27 | #include <linux/device.h> | |
7f8d4cad | 28 | #include <linux/cdev.h> |
987a6c02 | 29 | #include <linux/kernel.h> |
1da177e4 LT |
30 | |
31 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
32 | MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces"); | |
33 | MODULE_LICENSE("GPL"); | |
34 | ||
35 | #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X | |
36 | #define CONFIG_INPUT_MOUSEDEV_SCREEN_X 1024 | |
37 | #endif | |
38 | #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y | |
39 | #define CONFIG_INPUT_MOUSEDEV_SCREEN_Y 768 | |
40 | #endif | |
41 | ||
42 | static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X; | |
84c12b24 | 43 | module_param(xres, uint, 0644); |
1da177e4 LT |
44 | MODULE_PARM_DESC(xres, "Horizontal screen resolution"); |
45 | ||
46 | static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y; | |
84c12b24 | 47 | module_param(yres, uint, 0644); |
1da177e4 LT |
48 | MODULE_PARM_DESC(yres, "Vertical screen resolution"); |
49 | ||
50 | static unsigned tap_time = 200; | |
84c12b24 | 51 | module_param(tap_time, uint, 0644); |
1da177e4 LT |
52 | MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)"); |
53 | ||
54 | struct mousedev_hw_data { | |
55 | int dx, dy, dz; | |
56 | int x, y; | |
57 | int abs_event; | |
58 | unsigned long buttons; | |
59 | }; | |
60 | ||
61 | struct mousedev { | |
1da177e4 | 62 | int open; |
464b2415 | 63 | struct input_handle handle; |
1da177e4 | 64 | wait_queue_head_t wait; |
d0ffb9be | 65 | struct list_head client_list; |
464b2415 DT |
66 | spinlock_t client_lock; /* protects client_list */ |
67 | struct mutex mutex; | |
9657d75c | 68 | struct device dev; |
7f8d4cad | 69 | struct cdev cdev; |
20da92de | 70 | bool exist; |
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; | |
e4dbedc7 DT |
80 | |
81 | int (*open_device)(struct mousedev *mousedev); | |
82 | void (*close_device)(struct mousedev *mousedev); | |
1da177e4 LT |
83 | }; |
84 | ||
85 | enum mousedev_emul { | |
86 | MOUSEDEV_EMUL_PS2, | |
87 | MOUSEDEV_EMUL_IMPS, | |
88 | MOUSEDEV_EMUL_EXPS | |
89 | }; | |
90 | ||
91 | struct mousedev_motion { | |
92 | int dx, dy, dz; | |
93 | unsigned long buttons; | |
94 | }; | |
95 | ||
96 | #define PACKET_QUEUE_LEN 16 | |
d0ffb9be | 97 | struct mousedev_client { |
1da177e4 LT |
98 | struct fasync_struct *fasync; |
99 | struct mousedev *mousedev; | |
100 | struct list_head node; | |
101 | ||
102 | struct mousedev_motion packets[PACKET_QUEUE_LEN]; | |
103 | unsigned int head, tail; | |
104 | spinlock_t packet_lock; | |
105 | int pos_x, pos_y; | |
106 | ||
dae1a432 | 107 | u8 ps2[6]; |
1da177e4 LT |
108 | unsigned char ready, buffer, bufsiz; |
109 | unsigned char imexseq, impsseq; | |
110 | enum mousedev_emul mode; | |
c1e4c8d3 | 111 | unsigned long last_buttons; |
1da177e4 LT |
112 | }; |
113 | ||
114 | #define MOUSEDEV_SEQ_LEN 6 | |
115 | ||
116 | static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 }; | |
117 | static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 }; | |
118 | ||
9657d75c | 119 | static struct mousedev *mousedev_mix; |
d542ed82 | 120 | static LIST_HEAD(mousedev_mix_list); |
1da177e4 LT |
121 | |
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; |
dae1a432 ND |
295 | client->pos_x = clamp_val(client->pos_x, 0, xres); |
296 | ||
d0ffb9be | 297 | client->pos_y += packet->dy; |
dae1a432 | 298 | client->pos_y = clamp_val(client->pos_y, 0, yres); |
1da177e4 LT |
299 | |
300 | p->dx += packet->dx; | |
301 | p->dy += packet->dy; | |
302 | p->dz += packet->dz; | |
303 | p->buttons = mousedev->packet.buttons; | |
304 | ||
464b2415 DT |
305 | if (p->dx || p->dy || p->dz || |
306 | p->buttons != client->last_buttons) | |
d0ffb9be | 307 | client->ready = 1; |
1da177e4 | 308 | |
464b2415 | 309 | spin_unlock(&client->packet_lock); |
c1e4c8d3 | 310 | |
d0ffb9be DT |
311 | if (client->ready) { |
312 | kill_fasync(&client->fasync, SIGIO, POLL_IN); | |
8121152c DT |
313 | wake_readers = 1; |
314 | } | |
1da177e4 | 315 | } |
82ba56c2 | 316 | rcu_read_unlock(); |
1da177e4 | 317 | |
8121152c DT |
318 | if (wake_readers) |
319 | wake_up_interruptible(&mousedev->wait); | |
1da177e4 LT |
320 | } |
321 | ||
322 | static void mousedev_touchpad_touch(struct mousedev *mousedev, int value) | |
323 | { | |
324 | if (!value) { | |
325 | if (mousedev->touch && | |
464b2415 DT |
326 | time_before(jiffies, |
327 | mousedev->touch + msecs_to_jiffies(tap_time))) { | |
1da177e4 LT |
328 | /* |
329 | * Toggle left button to emulate tap. | |
330 | * We rely on the fact that mousedev_mix always has 0 | |
331 | * motion packet so we won't mess current position. | |
332 | */ | |
333 | set_bit(0, &mousedev->packet.buttons); | |
9657d75c DT |
334 | set_bit(0, &mousedev_mix->packet.buttons); |
335 | mousedev_notify_readers(mousedev, &mousedev_mix->packet); | |
464b2415 DT |
336 | mousedev_notify_readers(mousedev_mix, |
337 | &mousedev_mix->packet); | |
1da177e4 | 338 | clear_bit(0, &mousedev->packet.buttons); |
9657d75c | 339 | clear_bit(0, &mousedev_mix->packet.buttons); |
1da177e4 LT |
340 | } |
341 | mousedev->touch = mousedev->pkt_count = 0; | |
342 | mousedev->frac_dx = 0; | |
343 | mousedev->frac_dy = 0; | |
1e0afb28 DT |
344 | |
345 | } else if (!mousedev->touch) | |
346 | mousedev->touch = jiffies; | |
1da177e4 LT |
347 | } |
348 | ||
464b2415 DT |
349 | static void mousedev_event(struct input_handle *handle, |
350 | unsigned int type, unsigned int code, int value) | |
1da177e4 LT |
351 | { |
352 | struct mousedev *mousedev = handle->private; | |
353 | ||
354 | switch (type) { | |
1da177e4 | 355 | |
464b2415 DT |
356 | case EV_ABS: |
357 | /* Ignore joysticks */ | |
358 | if (test_bit(BTN_TRIGGER, handle->dev->keybit)) | |
359 | return; | |
1da177e4 | 360 | |
464b2415 DT |
361 | if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) |
362 | mousedev_touchpad_event(handle->dev, | |
363 | mousedev, code, value); | |
364 | else | |
365 | mousedev_abs_event(handle->dev, mousedev, code, value); | |
1da177e4 | 366 | |
464b2415 | 367 | break; |
1da177e4 | 368 | |
464b2415 DT |
369 | case EV_REL: |
370 | mousedev_rel_event(mousedev, code, value); | |
371 | break; | |
1da177e4 | 372 | |
464b2415 DT |
373 | case EV_KEY: |
374 | if (value != 2) { | |
375 | if (code == BTN_TOUCH && | |
376 | test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) | |
377 | mousedev_touchpad_touch(mousedev, value); | |
378 | else | |
379 | mousedev_key_event(mousedev, code, value); | |
380 | } | |
381 | break; | |
382 | ||
383 | case EV_SYN: | |
384 | if (code == SYN_REPORT) { | |
385 | if (mousedev->touch) { | |
386 | mousedev->pkt_count++; | |
387 | /* | |
388 | * Input system eats duplicate events, | |
389 | * but we need all of them to do correct | |
390 | * averaging so apply present one forward | |
391 | */ | |
392 | fx(0) = fx(1); | |
393 | fy(0) = fy(1); | |
1da177e4 | 394 | } |
464b2415 DT |
395 | |
396 | mousedev_notify_readers(mousedev, &mousedev->packet); | |
397 | mousedev_notify_readers(mousedev_mix, &mousedev->packet); | |
398 | ||
399 | mousedev->packet.dx = mousedev->packet.dy = | |
400 | mousedev->packet.dz = 0; | |
401 | mousedev->packet.abs_event = 0; | |
402 | } | |
403 | break; | |
1da177e4 LT |
404 | } |
405 | } | |
406 | ||
407 | static int mousedev_fasync(int fd, struct file *file, int on) | |
408 | { | |
d0ffb9be | 409 | struct mousedev_client *client = file->private_data; |
1e0afb28 | 410 | |
60aa4924 | 411 | return fasync_helper(fd, file, on, &client->fasync); |
1da177e4 LT |
412 | } |
413 | ||
9657d75c | 414 | static void mousedev_free(struct device *dev) |
1da177e4 | 415 | { |
9657d75c DT |
416 | struct mousedev *mousedev = container_of(dev, struct mousedev, dev); |
417 | ||
a7097ff8 | 418 | input_put_device(mousedev->handle.dev); |
1da177e4 LT |
419 | kfree(mousedev); |
420 | } | |
421 | ||
464b2415 | 422 | static int mousedev_open_device(struct mousedev *mousedev) |
1da177e4 | 423 | { |
464b2415 | 424 | int retval; |
1da177e4 | 425 | |
464b2415 DT |
426 | retval = mutex_lock_interruptible(&mousedev->mutex); |
427 | if (retval) | |
428 | return retval; | |
d542ed82 | 429 | |
e4dbedc7 | 430 | if (!mousedev->exist) |
464b2415 | 431 | retval = -ENODEV; |
06445014 | 432 | else if (!mousedev->open++) { |
464b2415 | 433 | retval = input_open_device(&mousedev->handle); |
06445014 ON |
434 | if (retval) |
435 | mousedev->open--; | |
436 | } | |
d542ed82 | 437 | |
464b2415 DT |
438 | mutex_unlock(&mousedev->mutex); |
439 | return retval; | |
d542ed82 DT |
440 | } |
441 | ||
464b2415 | 442 | static void mousedev_close_device(struct mousedev *mousedev) |
d542ed82 | 443 | { |
464b2415 | 444 | mutex_lock(&mousedev->mutex); |
d542ed82 | 445 | |
e4dbedc7 | 446 | if (mousedev->exist && !--mousedev->open) |
464b2415 DT |
447 | input_close_device(&mousedev->handle); |
448 | ||
449 | mutex_unlock(&mousedev->mutex); | |
d542ed82 DT |
450 | } |
451 | ||
464b2415 DT |
452 | /* |
453 | * Open all available devices so they can all be multiplexed in one. | |
454 | * stream. Note that this function is called with mousedev_mix->mutex | |
455 | * held. | |
456 | */ | |
e4dbedc7 | 457 | static int mixdev_open_devices(struct mousedev *mixdev) |
d542ed82 | 458 | { |
e4dbedc7 DT |
459 | int error; |
460 | ||
461 | error = mutex_lock_interruptible(&mixdev->mutex); | |
462 | if (error) | |
463 | return error; | |
d542ed82 | 464 | |
e4dbedc7 DT |
465 | if (!mixdev->open++) { |
466 | struct mousedev *mousedev; | |
9657d75c | 467 | |
e4dbedc7 DT |
468 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { |
469 | if (!mousedev->opened_by_mixdev) { | |
470 | if (mousedev_open_device(mousedev)) | |
471 | continue; | |
d542ed82 | 472 | |
e4dbedc7 DT |
473 | mousedev->opened_by_mixdev = true; |
474 | } | |
1da177e4 LT |
475 | } |
476 | } | |
e4dbedc7 DT |
477 | |
478 | mutex_unlock(&mixdev->mutex); | |
479 | return 0; | |
1da177e4 LT |
480 | } |
481 | ||
464b2415 DT |
482 | /* |
483 | * Close all devices that were opened as part of multiplexed | |
484 | * device. Note that this function is called with mousedev_mix->mutex | |
485 | * held. | |
486 | */ | |
e4dbedc7 | 487 | static void mixdev_close_devices(struct mousedev *mixdev) |
1da177e4 | 488 | { |
e4dbedc7 | 489 | mutex_lock(&mixdev->mutex); |
d542ed82 | 490 | |
e4dbedc7 DT |
491 | if (!--mixdev->open) { |
492 | struct mousedev *mousedev; | |
9657d75c | 493 | |
e4dbedc7 DT |
494 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { |
495 | if (mousedev->opened_by_mixdev) { | |
496 | mousedev->opened_by_mixdev = false; | |
497 | mousedev_close_device(mousedev); | |
498 | } | |
1da177e4 LT |
499 | } |
500 | } | |
e4dbedc7 DT |
501 | |
502 | mutex_unlock(&mixdev->mutex); | |
1da177e4 LT |
503 | } |
504 | ||
464b2415 DT |
505 | |
506 | static void mousedev_attach_client(struct mousedev *mousedev, | |
507 | struct mousedev_client *client) | |
508 | { | |
509 | spin_lock(&mousedev->client_lock); | |
510 | list_add_tail_rcu(&client->node, &mousedev->client_list); | |
511 | spin_unlock(&mousedev->client_lock); | |
464b2415 DT |
512 | } |
513 | ||
514 | static void mousedev_detach_client(struct mousedev *mousedev, | |
515 | struct mousedev_client *client) | |
516 | { | |
517 | spin_lock(&mousedev->client_lock); | |
518 | list_del_rcu(&client->node); | |
519 | spin_unlock(&mousedev->client_lock); | |
82ba56c2 | 520 | synchronize_rcu(); |
464b2415 DT |
521 | } |
522 | ||
d0ffb9be | 523 | static int mousedev_release(struct inode *inode, struct file *file) |
1da177e4 | 524 | { |
d0ffb9be DT |
525 | struct mousedev_client *client = file->private_data; |
526 | struct mousedev *mousedev = client->mousedev; | |
1da177e4 | 527 | |
464b2415 | 528 | mousedev_detach_client(mousedev, client); |
d0ffb9be | 529 | kfree(client); |
1da177e4 | 530 | |
e4dbedc7 | 531 | mousedev->close_device(mousedev); |
1da177e4 | 532 | |
1da177e4 LT |
533 | return 0; |
534 | } | |
535 | ||
d0ffb9be | 536 | static int mousedev_open(struct inode *inode, struct file *file) |
1da177e4 | 537 | { |
d0ffb9be | 538 | struct mousedev_client *client; |
1da177e4 | 539 | struct mousedev *mousedev; |
d542ed82 | 540 | int error; |
1da177e4 LT |
541 | |
542 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
543 | if (imajor(inode) == MISC_MAJOR) | |
7f8d4cad | 544 | mousedev = mousedev_mix; |
1da177e4 LT |
545 | else |
546 | #endif | |
7f8d4cad | 547 | mousedev = container_of(inode->i_cdev, struct mousedev, cdev); |
1da177e4 | 548 | |
d0ffb9be | 549 | client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL); |
7f8d4cad DT |
550 | if (!client) |
551 | return -ENOMEM; | |
1da177e4 | 552 | |
d0ffb9be DT |
553 | spin_lock_init(&client->packet_lock); |
554 | client->pos_x = xres / 2; | |
555 | client->pos_y = yres / 2; | |
556 | client->mousedev = mousedev; | |
464b2415 | 557 | mousedev_attach_client(mousedev, client); |
1da177e4 | 558 | |
e4dbedc7 | 559 | error = mousedev->open_device(mousedev); |
464b2415 DT |
560 | if (error) |
561 | goto err_free_client; | |
1da177e4 | 562 | |
d0ffb9be | 563 | file->private_data = client; |
0124be49 | 564 | nonseekable_open(inode, file); |
7f8d4cad | 565 | |
1da177e4 | 566 | return 0; |
9657d75c DT |
567 | |
568 | err_free_client: | |
464b2415 | 569 | mousedev_detach_client(mousedev, client); |
9657d75c | 570 | kfree(client); |
9657d75c | 571 | return error; |
1da177e4 LT |
572 | } |
573 | ||
dae1a432 | 574 | static void mousedev_packet(struct mousedev_client *client, u8 *ps2_data) |
1da177e4 | 575 | { |
464b2415 | 576 | struct mousedev_motion *p = &client->packets[client->tail]; |
dae1a432 ND |
577 | s8 dx, dy, dz; |
578 | ||
579 | dx = clamp_val(p->dx, -127, 127); | |
580 | p->dx -= dx; | |
581 | ||
582 | dy = clamp_val(p->dy, -127, 127); | |
583 | p->dy -= dy; | |
1da177e4 | 584 | |
dae1a432 ND |
585 | ps2_data[0] = BIT(3); |
586 | ps2_data[0] |= ((dx & BIT(7)) >> 3) | ((dy & BIT(7)) >> 2); | |
587 | ps2_data[0] |= p->buttons & 0x07; | |
588 | ps2_data[1] = dx; | |
589 | ps2_data[2] = dy; | |
1da177e4 | 590 | |
d0ffb9be | 591 | switch (client->mode) { |
464b2415 | 592 | case MOUSEDEV_EMUL_EXPS: |
dae1a432 ND |
593 | dz = clamp_val(p->dz, -7, 7); |
594 | p->dz -= dz; | |
595 | ||
596 | ps2_data[3] = (dz & 0x0f) | ((p->buttons & 0x18) << 1); | |
464b2415 DT |
597 | client->bufsiz = 4; |
598 | break; | |
599 | ||
600 | case MOUSEDEV_EMUL_IMPS: | |
dae1a432 ND |
601 | dz = clamp_val(p->dz, -127, 127); |
602 | p->dz -= dz; | |
603 | ||
604 | ps2_data[0] |= ((p->buttons & 0x10) >> 3) | | |
605 | ((p->buttons & 0x08) >> 1); | |
606 | ps2_data[3] = dz; | |
607 | ||
464b2415 DT |
608 | client->bufsiz = 4; |
609 | break; | |
610 | ||
611 | case MOUSEDEV_EMUL_PS2: | |
612 | default: | |
464b2415 | 613 | p->dz = 0; |
dae1a432 ND |
614 | |
615 | ps2_data[0] |= ((p->buttons & 0x10) >> 3) | | |
616 | ((p->buttons & 0x08) >> 1); | |
617 | ||
464b2415 DT |
618 | client->bufsiz = 3; |
619 | break; | |
1da177e4 LT |
620 | } |
621 | ||
622 | if (!p->dx && !p->dy && !p->dz) { | |
d0ffb9be DT |
623 | if (client->tail == client->head) { |
624 | client->ready = 0; | |
625 | client->last_buttons = p->buttons; | |
c1e4c8d3 | 626 | } else |
d0ffb9be | 627 | client->tail = (client->tail + 1) % PACKET_QUEUE_LEN; |
1da177e4 | 628 | } |
1da177e4 LT |
629 | } |
630 | ||
464b2415 DT |
631 | static void mousedev_generate_response(struct mousedev_client *client, |
632 | int command) | |
633 | { | |
634 | client->ps2[0] = 0xfa; /* ACK */ | |
1da177e4 | 635 | |
464b2415 DT |
636 | switch (command) { |
637 | ||
638 | case 0xeb: /* Poll */ | |
639 | mousedev_packet(client, &client->ps2[1]); | |
640 | client->bufsiz++; /* account for leading ACK */ | |
641 | break; | |
642 | ||
643 | case 0xf2: /* Get ID */ | |
644 | switch (client->mode) { | |
645 | case MOUSEDEV_EMUL_PS2: | |
646 | client->ps2[1] = 0; | |
647 | break; | |
648 | case MOUSEDEV_EMUL_IMPS: | |
649 | client->ps2[1] = 3; | |
650 | break; | |
651 | case MOUSEDEV_EMUL_EXPS: | |
652 | client->ps2[1] = 4; | |
653 | break; | |
654 | } | |
655 | client->bufsiz = 2; | |
656 | break; | |
657 | ||
658 | case 0xe9: /* Get info */ | |
659 | client->ps2[1] = 0x60; client->ps2[2] = 3; client->ps2[3] = 200; | |
660 | client->bufsiz = 4; | |
661 | break; | |
662 | ||
663 | case 0xff: /* Reset */ | |
664 | client->impsseq = client->imexseq = 0; | |
665 | client->mode = MOUSEDEV_EMUL_PS2; | |
666 | client->ps2[1] = 0xaa; client->ps2[2] = 0x00; | |
667 | client->bufsiz = 3; | |
668 | break; | |
669 | ||
670 | default: | |
671 | client->bufsiz = 1; | |
672 | break; | |
673 | } | |
674 | client->buffer = client->bufsiz; | |
675 | } | |
676 | ||
677 | static ssize_t mousedev_write(struct file *file, const char __user *buffer, | |
678 | size_t count, loff_t *ppos) | |
1da177e4 | 679 | { |
d0ffb9be | 680 | struct mousedev_client *client = file->private_data; |
1da177e4 LT |
681 | unsigned char c; |
682 | unsigned int i; | |
683 | ||
684 | for (i = 0; i < count; i++) { | |
685 | ||
686 | if (get_user(c, buffer + i)) | |
687 | return -EFAULT; | |
688 | ||
464b2415 DT |
689 | spin_lock_irq(&client->packet_lock); |
690 | ||
d0ffb9be DT |
691 | if (c == mousedev_imex_seq[client->imexseq]) { |
692 | if (++client->imexseq == MOUSEDEV_SEQ_LEN) { | |
693 | client->imexseq = 0; | |
694 | client->mode = MOUSEDEV_EMUL_EXPS; | |
1da177e4 | 695 | } |
1e0afb28 | 696 | } else |
d0ffb9be | 697 | client->imexseq = 0; |
1da177e4 | 698 | |
d0ffb9be DT |
699 | if (c == mousedev_imps_seq[client->impsseq]) { |
700 | if (++client->impsseq == MOUSEDEV_SEQ_LEN) { | |
701 | client->impsseq = 0; | |
702 | client->mode = MOUSEDEV_EMUL_IMPS; | |
1da177e4 | 703 | } |
1e0afb28 | 704 | } else |
d0ffb9be | 705 | client->impsseq = 0; |
1da177e4 | 706 | |
464b2415 | 707 | mousedev_generate_response(client, c); |
1da177e4 | 708 | |
464b2415 | 709 | spin_unlock_irq(&client->packet_lock); |
f74c371f | 710 | cond_resched(); |
1da177e4 LT |
711 | } |
712 | ||
d0ffb9be | 713 | kill_fasync(&client->fasync, SIGIO, POLL_IN); |
d0ffb9be | 714 | wake_up_interruptible(&client->mousedev->wait); |
1da177e4 LT |
715 | |
716 | return count; | |
717 | } | |
718 | ||
464b2415 DT |
719 | static ssize_t mousedev_read(struct file *file, char __user *buffer, |
720 | size_t count, loff_t *ppos) | |
1da177e4 | 721 | { |
d0ffb9be | 722 | struct mousedev_client *client = file->private_data; |
464b2415 | 723 | struct mousedev *mousedev = client->mousedev; |
dae1a432 | 724 | u8 data[sizeof(client->ps2)]; |
1da177e4 LT |
725 | int retval = 0; |
726 | ||
464b2415 DT |
727 | if (!client->ready && !client->buffer && mousedev->exist && |
728 | (file->f_flags & O_NONBLOCK)) | |
1da177e4 LT |
729 | return -EAGAIN; |
730 | ||
464b2415 DT |
731 | retval = wait_event_interruptible(mousedev->wait, |
732 | !mousedev->exist || client->ready || client->buffer); | |
1da177e4 LT |
733 | if (retval) |
734 | return retval; | |
735 | ||
464b2415 | 736 | if (!mousedev->exist) |
1da177e4 LT |
737 | return -ENODEV; |
738 | ||
464b2415 DT |
739 | spin_lock_irq(&client->packet_lock); |
740 | ||
d0ffb9be DT |
741 | if (!client->buffer && client->ready) { |
742 | mousedev_packet(client, client->ps2); | |
743 | client->buffer = client->bufsiz; | |
1da177e4 LT |
744 | } |
745 | ||
d0ffb9be DT |
746 | if (count > client->buffer) |
747 | count = client->buffer; | |
1da177e4 | 748 | |
464b2415 | 749 | memcpy(data, client->ps2 + client->bufsiz - client->buffer, count); |
d0ffb9be | 750 | client->buffer -= count; |
1da177e4 | 751 | |
464b2415 DT |
752 | spin_unlock_irq(&client->packet_lock); |
753 | ||
754 | if (copy_to_user(buffer, data, count)) | |
1da177e4 LT |
755 | return -EFAULT; |
756 | ||
757 | return count; | |
758 | } | |
759 | ||
760 | /* No kernel lock - fine */ | |
afc9a42b | 761 | static __poll_t mousedev_poll(struct file *file, poll_table *wait) |
1da177e4 | 762 | { |
d0ffb9be DT |
763 | struct mousedev_client *client = file->private_data; |
764 | struct mousedev *mousedev = client->mousedev; | |
afc9a42b | 765 | __poll_t mask; |
1e0afb28 | 766 | |
d0ffb9be | 767 | poll_wait(file, &mousedev->wait, wait); |
4d4bf995 | 768 | |
a9a08845 | 769 | mask = mousedev->exist ? EPOLLOUT | EPOLLWRNORM : EPOLLHUP | EPOLLERR; |
4d4bf995 | 770 | if (client->ready || client->buffer) |
a9a08845 | 771 | mask |= EPOLLIN | EPOLLRDNORM; |
4d4bf995 JM |
772 | |
773 | return mask; | |
1da177e4 LT |
774 | } |
775 | ||
66e66118 | 776 | static const struct file_operations mousedev_fops = { |
1c74585e DT |
777 | .owner = THIS_MODULE, |
778 | .read = mousedev_read, | |
779 | .write = mousedev_write, | |
780 | .poll = mousedev_poll, | |
781 | .open = mousedev_open, | |
782 | .release = mousedev_release, | |
783 | .fasync = mousedev_fasync, | |
784 | .llseek = noop_llseek, | |
1da177e4 LT |
785 | }; |
786 | ||
464b2415 DT |
787 | /* |
788 | * Mark device non-existent. This disables writes, ioctls and | |
789 | * prevents new users from opening the device. Already posted | |
790 | * blocking reads will stay, however new ones will fail. | |
791 | */ | |
792 | static void mousedev_mark_dead(struct mousedev *mousedev) | |
793 | { | |
794 | mutex_lock(&mousedev->mutex); | |
20da92de | 795 | mousedev->exist = false; |
464b2415 DT |
796 | mutex_unlock(&mousedev->mutex); |
797 | } | |
798 | ||
799 | /* | |
800 | * Wake up users waiting for IO so they can disconnect from | |
801 | * dead device. | |
802 | */ | |
803 | static void mousedev_hangup(struct mousedev *mousedev) | |
804 | { | |
805 | struct mousedev_client *client; | |
806 | ||
807 | spin_lock(&mousedev->client_lock); | |
808 | list_for_each_entry(client, &mousedev->client_list, node) | |
809 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
810 | spin_unlock(&mousedev->client_lock); | |
811 | ||
812 | wake_up_interruptible(&mousedev->wait); | |
813 | } | |
814 | ||
815 | static void mousedev_cleanup(struct mousedev *mousedev) | |
816 | { | |
817 | struct input_handle *handle = &mousedev->handle; | |
818 | ||
819 | mousedev_mark_dead(mousedev); | |
820 | mousedev_hangup(mousedev); | |
7f8d4cad | 821 | |
464b2415 DT |
822 | /* mousedev is marked dead so no one else accesses mousedev->open */ |
823 | if (mousedev->open) | |
824 | input_close_device(handle); | |
825 | } | |
826 | ||
7f8d4cad DT |
827 | static int mousedev_reserve_minor(bool mixdev) |
828 | { | |
829 | int minor; | |
830 | ||
831 | if (mixdev) { | |
832 | minor = input_get_new_minor(MOUSEDEV_MIX, 1, false); | |
833 | if (minor < 0) | |
834 | pr_err("failed to reserve mixdev minor: %d\n", minor); | |
835 | } else { | |
836 | minor = input_get_new_minor(MOUSEDEV_MINOR_BASE, | |
837 | MOUSEDEV_MINORS, true); | |
838 | if (minor < 0) | |
839 | pr_err("failed to reserve new minor: %d\n", minor); | |
840 | } | |
841 | ||
842 | return minor; | |
843 | } | |
844 | ||
9657d75c DT |
845 | static struct mousedev *mousedev_create(struct input_dev *dev, |
846 | struct input_handler *handler, | |
7f8d4cad | 847 | bool mixdev) |
1da177e4 LT |
848 | { |
849 | struct mousedev *mousedev; | |
7f8d4cad | 850 | int minor; |
5b2a0826 | 851 | int error; |
1da177e4 | 852 | |
7f8d4cad DT |
853 | minor = mousedev_reserve_minor(mixdev); |
854 | if (minor < 0) { | |
855 | error = minor; | |
856 | goto err_out; | |
857 | } | |
858 | ||
5b2a0826 | 859 | mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL); |
9657d75c DT |
860 | if (!mousedev) { |
861 | error = -ENOMEM; | |
7f8d4cad | 862 | goto err_free_minor; |
9657d75c | 863 | } |
1da177e4 | 864 | |
d0ffb9be | 865 | INIT_LIST_HEAD(&mousedev->client_list); |
5b2a0826 | 866 | INIT_LIST_HEAD(&mousedev->mixdev_node); |
464b2415 DT |
867 | spin_lock_init(&mousedev->client_lock); |
868 | mutex_init(&mousedev->mutex); | |
869 | lockdep_set_subclass(&mousedev->mutex, | |
7f8d4cad | 870 | mixdev ? SINGLE_DEPTH_NESTING : 0); |
1da177e4 LT |
871 | init_waitqueue_head(&mousedev->wait); |
872 | ||
7f8d4cad | 873 | if (mixdev) { |
3d5cb60e | 874 | dev_set_name(&mousedev->dev, "mice"); |
e4dbedc7 DT |
875 | |
876 | mousedev->open_device = mixdev_open_devices; | |
877 | mousedev->close_device = mixdev_close_devices; | |
7f8d4cad DT |
878 | } else { |
879 | int dev_no = minor; | |
880 | /* Normalize device number if it falls into legacy range */ | |
881 | if (dev_no < MOUSEDEV_MINOR_BASE + MOUSEDEV_MINORS) | |
882 | dev_no -= MOUSEDEV_MINOR_BASE; | |
883 | dev_set_name(&mousedev->dev, "mouse%d", dev_no); | |
e4dbedc7 DT |
884 | |
885 | mousedev->open_device = mousedev_open_device; | |
886 | mousedev->close_device = mousedev_close_device; | |
7f8d4cad | 887 | } |
9657d75c | 888 | |
20da92de | 889 | mousedev->exist = true; |
a7097ff8 | 890 | mousedev->handle.dev = input_get_device(dev); |
3d5cb60e | 891 | mousedev->handle.name = dev_name(&mousedev->dev); |
1da177e4 LT |
892 | mousedev->handle.handler = handler; |
893 | mousedev->handle.private = mousedev; | |
1da177e4 | 894 | |
9657d75c DT |
895 | mousedev->dev.class = &input_class; |
896 | if (dev) | |
897 | mousedev->dev.parent = &dev->dev; | |
7f8d4cad | 898 | mousedev->dev.devt = MKDEV(INPUT_MAJOR, minor); |
9657d75c DT |
899 | mousedev->dev.release = mousedev_free; |
900 | device_initialize(&mousedev->dev); | |
1da177e4 | 901 | |
7f8d4cad | 902 | if (!mixdev) { |
464b2415 DT |
903 | error = input_register_handle(&mousedev->handle); |
904 | if (error) | |
905 | goto err_free_mousedev; | |
906 | } | |
907 | ||
7f8d4cad | 908 | cdev_init(&mousedev->cdev, &mousedev_fops); |
5b2a0826 | 909 | |
358a89ca | 910 | error = cdev_device_add(&mousedev->cdev, &mousedev->dev); |
9657d75c | 911 | if (error) |
464b2415 | 912 | goto err_cleanup_mousedev; |
9657d75c DT |
913 | |
914 | return mousedev; | |
915 | ||
464b2415 DT |
916 | err_cleanup_mousedev: |
917 | mousedev_cleanup(mousedev); | |
7f8d4cad | 918 | if (!mixdev) |
464b2415 | 919 | input_unregister_handle(&mousedev->handle); |
9657d75c DT |
920 | err_free_mousedev: |
921 | put_device(&mousedev->dev); | |
7f8d4cad DT |
922 | err_free_minor: |
923 | input_free_minor(minor); | |
9657d75c DT |
924 | err_out: |
925 | return ERR_PTR(error); | |
926 | } | |
927 | ||
928 | static void mousedev_destroy(struct mousedev *mousedev) | |
929 | { | |
358a89ca | 930 | cdev_device_del(&mousedev->cdev, &mousedev->dev); |
464b2415 | 931 | mousedev_cleanup(mousedev); |
7f8d4cad | 932 | input_free_minor(MINOR(mousedev->dev.devt)); |
e4dbedc7 | 933 | if (mousedev != mousedev_mix) |
464b2415 DT |
934 | input_unregister_handle(&mousedev->handle); |
935 | put_device(&mousedev->dev); | |
936 | } | |
9657d75c | 937 | |
464b2415 DT |
938 | static int mixdev_add_device(struct mousedev *mousedev) |
939 | { | |
940 | int retval; | |
941 | ||
942 | retval = mutex_lock_interruptible(&mousedev_mix->mutex); | |
943 | if (retval) | |
944 | return retval; | |
945 | ||
946 | if (mousedev_mix->open) { | |
947 | retval = mousedev_open_device(mousedev); | |
948 | if (retval) | |
949 | goto out; | |
950 | ||
3376b8b7 | 951 | mousedev->opened_by_mixdev = true; |
5b2a0826 | 952 | } |
c9bcd582 | 953 | |
464b2415 DT |
954 | get_device(&mousedev->dev); |
955 | list_add_tail(&mousedev->mixdev_node, &mousedev_mix_list); | |
956 | ||
957 | out: | |
958 | mutex_unlock(&mousedev_mix->mutex); | |
959 | return retval; | |
960 | } | |
961 | ||
962 | static void mixdev_remove_device(struct mousedev *mousedev) | |
963 | { | |
964 | mutex_lock(&mousedev_mix->mutex); | |
965 | ||
3376b8b7 DT |
966 | if (mousedev->opened_by_mixdev) { |
967 | mousedev->opened_by_mixdev = false; | |
464b2415 DT |
968 | mousedev_close_device(mousedev); |
969 | } | |
970 | ||
971 | list_del_init(&mousedev->mixdev_node); | |
972 | mutex_unlock(&mousedev_mix->mutex); | |
973 | ||
9657d75c DT |
974 | put_device(&mousedev->dev); |
975 | } | |
976 | ||
464b2415 DT |
977 | static int mousedev_connect(struct input_handler *handler, |
978 | struct input_dev *dev, | |
9657d75c DT |
979 | const struct input_device_id *id) |
980 | { | |
981 | struct mousedev *mousedev; | |
9657d75c DT |
982 | int error; |
983 | ||
7f8d4cad | 984 | mousedev = mousedev_create(dev, handler, false); |
9657d75c DT |
985 | if (IS_ERR(mousedev)) |
986 | return PTR_ERR(mousedev); | |
5b2a0826 | 987 | |
d542ed82 | 988 | error = mixdev_add_device(mousedev); |
464b2415 DT |
989 | if (error) { |
990 | mousedev_destroy(mousedev); | |
991 | return error; | |
992 | } | |
1da177e4 | 993 | |
5b2a0826 | 994 | return 0; |
1da177e4 LT |
995 | } |
996 | ||
997 | static void mousedev_disconnect(struct input_handle *handle) | |
998 | { | |
999 | struct mousedev *mousedev = handle->private; | |
1da177e4 | 1000 | |
d542ed82 | 1001 | mixdev_remove_device(mousedev); |
9657d75c | 1002 | mousedev_destroy(mousedev); |
1da177e4 LT |
1003 | } |
1004 | ||
66e66118 | 1005 | static const struct input_device_id mousedev_ids[] = { |
1da177e4 | 1006 | { |
464b2415 DT |
1007 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1008 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1009 | INPUT_DEVICE_ID_MATCH_RELBIT, | |
7b19ada2 JS |
1010 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) }, |
1011 | .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) }, | |
1012 | .relbit = { BIT_MASK(REL_X) | BIT_MASK(REL_Y) }, | |
464b2415 DT |
1013 | }, /* A mouse like device, at least one button, |
1014 | two relative axes */ | |
1da177e4 | 1015 | { |
464b2415 DT |
1016 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1017 | INPUT_DEVICE_ID_MATCH_RELBIT, | |
7b19ada2 JS |
1018 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) }, |
1019 | .relbit = { BIT_MASK(REL_WHEEL) }, | |
1da177e4 LT |
1020 | }, /* A separate scrollwheel */ |
1021 | { | |
464b2415 DT |
1022 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1023 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1024 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
1025 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
1026 | .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) }, | |
1027 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) }, | |
464b2415 DT |
1028 | }, /* A tablet like device, at least touch detection, |
1029 | two absolute axes */ | |
1da177e4 | 1030 | { |
464b2415 DT |
1031 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
1032 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1033 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
7b19ada2 JS |
1034 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
1035 | .keybit = { [BIT_WORD(BTN_TOOL_FINGER)] = | |
1036 | BIT_MASK(BTN_TOOL_FINGER) }, | |
1037 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) | | |
1038 | BIT_MASK(ABS_PRESSURE) | | |
1039 | BIT_MASK(ABS_TOOL_WIDTH) }, | |
1da177e4 | 1040 | }, /* A touchpad */ |
6724f934 MP |
1041 | { |
1042 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | | |
1043 | INPUT_DEVICE_ID_MATCH_KEYBIT | | |
1044 | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
d182c10c | 1045 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
6724f934 MP |
1046 | .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) }, |
1047 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) }, | |
1048 | }, /* Mouse-like device with absolute X and Y but ordinary | |
1049 | clicks, like hp ILO2 High Performance mouse */ | |
1da177e4 | 1050 | |
d0ffb9be | 1051 | { }, /* Terminating entry */ |
1da177e4 LT |
1052 | }; |
1053 | ||
1054 | MODULE_DEVICE_TABLE(input, mousedev_ids); | |
1055 | ||
1056 | static struct input_handler mousedev_handler = { | |
1c74585e DT |
1057 | .event = mousedev_event, |
1058 | .connect = mousedev_connect, | |
1059 | .disconnect = mousedev_disconnect, | |
7f8d4cad | 1060 | .legacy_minors = true, |
1c74585e DT |
1061 | .minor = MOUSEDEV_MINOR_BASE, |
1062 | .name = "mousedev", | |
1063 | .id_table = mousedev_ids, | |
1da177e4 LT |
1064 | }; |
1065 | ||
1066 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
a2cb1191 DT |
1067 | #include <linux/miscdevice.h> |
1068 | ||
1da177e4 | 1069 | static struct miscdevice psaux_mouse = { |
a2cb1191 DT |
1070 | .minor = PSMOUSE_MINOR, |
1071 | .name = "psaux", | |
1072 | .fops = &mousedev_fops, | |
1da177e4 | 1073 | }; |
a2cb1191 DT |
1074 | |
1075 | static bool psaux_registered; | |
1076 | ||
1077 | static void __init mousedev_psaux_register(void) | |
1078 | { | |
1079 | int error; | |
1080 | ||
1081 | error = misc_register(&psaux_mouse); | |
1082 | if (error) | |
1083 | pr_warn("could not register psaux device, error: %d\n", | |
1084 | error); | |
1085 | else | |
1086 | psaux_registered = true; | |
1087 | } | |
1088 | ||
1089 | static void __exit mousedev_psaux_unregister(void) | |
1090 | { | |
1091 | if (psaux_registered) | |
1092 | misc_deregister(&psaux_mouse); | |
1093 | } | |
1094 | #else | |
1095 | static inline void mousedev_psaux_register(void) { } | |
1096 | static inline void mousedev_psaux_unregister(void) { } | |
1da177e4 LT |
1097 | #endif |
1098 | ||
1099 | static int __init mousedev_init(void) | |
1100 | { | |
4263cf0f DT |
1101 | int error; |
1102 | ||
7f8d4cad | 1103 | mousedev_mix = mousedev_create(NULL, &mousedev_handler, true); |
9657d75c DT |
1104 | if (IS_ERR(mousedev_mix)) |
1105 | return PTR_ERR(mousedev_mix); | |
1106 | ||
4263cf0f | 1107 | error = input_register_handler(&mousedev_handler); |
9657d75c DT |
1108 | if (error) { |
1109 | mousedev_destroy(mousedev_mix); | |
4263cf0f | 1110 | return error; |
4263cf0f | 1111 | } |
1da177e4 | 1112 | |
a2cb1191 | 1113 | mousedev_psaux_register(); |
1da177e4 | 1114 | |
da0c4901 | 1115 | pr_info("PS/2 mouse device common for all mice\n"); |
1da177e4 LT |
1116 | |
1117 | return 0; | |
1118 | } | |
1119 | ||
1120 | static void __exit mousedev_exit(void) | |
1121 | { | |
a2cb1191 | 1122 | mousedev_psaux_unregister(); |
1da177e4 | 1123 | input_unregister_handler(&mousedev_handler); |
9657d75c | 1124 | mousedev_destroy(mousedev_mix); |
1da177e4 LT |
1125 | } |
1126 | ||
1127 | module_init(mousedev_init); | |
1128 | module_exit(mousedev_exit); |