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 |
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 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX |
29 | #include <linux/miscdevice.h> | |
30 | #endif | |
31 | ||
32 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
33 | MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces"); | |
34 | MODULE_LICENSE("GPL"); | |
35 | ||
36 | #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X | |
37 | #define CONFIG_INPUT_MOUSEDEV_SCREEN_X 1024 | |
38 | #endif | |
39 | #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y | |
40 | #define CONFIG_INPUT_MOUSEDEV_SCREEN_Y 768 | |
41 | #endif | |
42 | ||
43 | static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X; | |
84c12b24 | 44 | module_param(xres, uint, 0644); |
1da177e4 LT |
45 | MODULE_PARM_DESC(xres, "Horizontal screen resolution"); |
46 | ||
47 | static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y; | |
84c12b24 | 48 | module_param(yres, uint, 0644); |
1da177e4 LT |
49 | MODULE_PARM_DESC(yres, "Vertical screen resolution"); |
50 | ||
51 | static unsigned tap_time = 200; | |
84c12b24 | 52 | module_param(tap_time, uint, 0644); |
1da177e4 LT |
53 | MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)"); |
54 | ||
55 | struct mousedev_hw_data { | |
56 | int dx, dy, dz; | |
57 | int x, y; | |
58 | int abs_event; | |
59 | unsigned long buttons; | |
60 | }; | |
61 | ||
62 | struct mousedev { | |
1da177e4 LT |
63 | int open; |
64 | int minor; | |
464b2415 | 65 | struct input_handle handle; |
1da177e4 | 66 | wait_queue_head_t wait; |
d0ffb9be | 67 | struct list_head client_list; |
464b2415 DT |
68 | spinlock_t client_lock; /* protects client_list */ |
69 | struct mutex mutex; | |
9657d75c | 70 | struct device dev; |
20da92de | 71 | bool exist; |
1da177e4 | 72 | |
d542ed82 DT |
73 | struct list_head mixdev_node; |
74 | int mixdev_open; | |
75 | ||
1da177e4 LT |
76 | struct mousedev_hw_data packet; |
77 | unsigned int pkt_count; | |
78 | int old_x[4], old_y[4]; | |
79 | int frac_dx, frac_dy; | |
80 | unsigned long touch; | |
81 | }; | |
82 | ||
83 | enum mousedev_emul { | |
84 | MOUSEDEV_EMUL_PS2, | |
85 | MOUSEDEV_EMUL_IMPS, | |
86 | MOUSEDEV_EMUL_EXPS | |
87 | }; | |
88 | ||
89 | struct mousedev_motion { | |
90 | int dx, dy, dz; | |
91 | unsigned long buttons; | |
92 | }; | |
93 | ||
94 | #define PACKET_QUEUE_LEN 16 | |
d0ffb9be | 95 | struct mousedev_client { |
1da177e4 LT |
96 | struct fasync_struct *fasync; |
97 | struct mousedev *mousedev; | |
98 | struct list_head node; | |
99 | ||
100 | struct mousedev_motion packets[PACKET_QUEUE_LEN]; | |
101 | unsigned int head, tail; | |
102 | spinlock_t packet_lock; | |
103 | int pos_x, pos_y; | |
104 | ||
105 | signed char ps2[6]; | |
106 | unsigned char ready, buffer, bufsiz; | |
107 | unsigned char imexseq, impsseq; | |
108 | enum mousedev_emul mode; | |
c1e4c8d3 | 109 | unsigned long last_buttons; |
1da177e4 LT |
110 | }; |
111 | ||
112 | #define MOUSEDEV_SEQ_LEN 6 | |
113 | ||
114 | static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 }; | |
115 | static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 }; | |
116 | ||
117 | static struct input_handler mousedev_handler; | |
118 | ||
119 | static struct mousedev *mousedev_table[MOUSEDEV_MINORS]; | |
464b2415 | 120 | static DEFINE_MUTEX(mousedev_table_mutex); |
9657d75c | 121 | static struct mousedev *mousedev_mix; |
d542ed82 | 122 | static LIST_HEAD(mousedev_mix_list); |
1da177e4 | 123 | |
464b2415 DT |
124 | static void mixdev_open_devices(void); |
125 | static void mixdev_close_devices(void); | |
126 | ||
1da177e4 LT |
127 | #define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03]) |
128 | #define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03]) | |
129 | ||
464b2415 DT |
130 | static void mousedev_touchpad_event(struct input_dev *dev, |
131 | struct mousedev *mousedev, | |
132 | unsigned int code, int value) | |
1da177e4 LT |
133 | { |
134 | int size, tmp; | |
135 | enum { FRACTION_DENOM = 128 }; | |
136 | ||
0d9d93c4 | 137 | switch (code) { |
1da177e4 | 138 | |
464b2415 | 139 | case ABS_X: |
987a6c02 | 140 | |
464b2415 DT |
141 | fx(0) = value; |
142 | if (mousedev->touch && mousedev->pkt_count >= 2) { | |
268ba5c0 CF |
143 | size = input_abs_get_max(dev, ABS_X) - |
144 | input_abs_get_min(dev, ABS_X); | |
464b2415 DT |
145 | if (size == 0) |
146 | size = 256 * 2; | |
987a6c02 | 147 | |
464b2415 DT |
148 | tmp = ((value - fx(2)) * 256 * FRACTION_DENOM) / size; |
149 | tmp += mousedev->frac_dx; | |
150 | mousedev->packet.dx = tmp / FRACTION_DENOM; | |
151 | mousedev->frac_dx = | |
152 | tmp - mousedev->packet.dx * FRACTION_DENOM; | |
153 | } | |
154 | break; | |
155 | ||
156 | case ABS_Y: | |
157 | fy(0) = value; | |
158 | if (mousedev->touch && mousedev->pkt_count >= 2) { | |
987a6c02 | 159 | /* use X size for ABS_Y to keep the same scale */ |
268ba5c0 CF |
160 | size = input_abs_get_max(dev, ABS_X) - |
161 | input_abs_get_min(dev, ABS_X); | |
464b2415 DT |
162 | if (size == 0) |
163 | size = 256 * 2; | |
987a6c02 | 164 | |
464b2415 DT |
165 | tmp = -((value - fy(2)) * 256 * FRACTION_DENOM) / size; |
166 | tmp += mousedev->frac_dy; | |
167 | mousedev->packet.dy = tmp / FRACTION_DENOM; | |
168 | mousedev->frac_dy = tmp - | |
169 | mousedev->packet.dy * FRACTION_DENOM; | |
170 | } | |
171 | break; | |
1da177e4 LT |
172 | } |
173 | } | |
174 | ||
464b2415 DT |
175 | static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, |
176 | unsigned int code, int value) | |
1da177e4 | 177 | { |
987a6c02 | 178 | int min, max, size; |
1da177e4 LT |
179 | |
180 | switch (code) { | |
1da177e4 | 181 | |
464b2415 | 182 | case ABS_X: |
987a6c02 DM |
183 | min = input_abs_get_min(dev, ABS_X); |
184 | max = input_abs_get_max(dev, ABS_X); | |
185 | ||
186 | size = max - min; | |
464b2415 DT |
187 | if (size == 0) |
188 | size = xres ? : 1; | |
987a6c02 | 189 | |
8c127f07 | 190 | value = clamp(value, min, max); |
987a6c02 DM |
191 | |
192 | mousedev->packet.x = ((value - min) * xres) / size; | |
464b2415 DT |
193 | mousedev->packet.abs_event = 1; |
194 | break; | |
195 | ||
196 | case ABS_Y: | |
987a6c02 DM |
197 | min = input_abs_get_min(dev, ABS_Y); |
198 | max = input_abs_get_max(dev, ABS_Y); | |
199 | ||
200 | size = max - min; | |
464b2415 DT |
201 | if (size == 0) |
202 | size = yres ? : 1; | |
987a6c02 | 203 | |
8c127f07 | 204 | value = clamp(value, min, max); |
987a6c02 DM |
205 | |
206 | mousedev->packet.y = yres - ((value - min) * yres) / size; | |
464b2415 DT |
207 | mousedev->packet.abs_event = 1; |
208 | break; | |
1da177e4 LT |
209 | } |
210 | } | |
211 | ||
464b2415 DT |
212 | static void mousedev_rel_event(struct mousedev *mousedev, |
213 | unsigned int code, int value) | |
1da177e4 LT |
214 | { |
215 | switch (code) { | |
464b2415 DT |
216 | case REL_X: |
217 | mousedev->packet.dx += value; | |
218 | break; | |
219 | ||
220 | case REL_Y: | |
221 | mousedev->packet.dy -= value; | |
222 | break; | |
223 | ||
224 | case REL_WHEEL: | |
225 | mousedev->packet.dz -= value; | |
226 | break; | |
1da177e4 LT |
227 | } |
228 | } | |
229 | ||
464b2415 DT |
230 | static void mousedev_key_event(struct mousedev *mousedev, |
231 | unsigned int code, int value) | |
1da177e4 LT |
232 | { |
233 | int index; | |
234 | ||
235 | switch (code) { | |
464b2415 DT |
236 | |
237 | case BTN_TOUCH: | |
238 | case BTN_0: | |
239 | case BTN_LEFT: index = 0; break; | |
240 | ||
241 | case BTN_STYLUS: | |
242 | case BTN_1: | |
243 | case BTN_RIGHT: index = 1; break; | |
244 | ||
245 | case BTN_2: | |
246 | case BTN_FORWARD: | |
247 | case BTN_STYLUS2: | |
248 | case BTN_MIDDLE: index = 2; break; | |
249 | ||
250 | case BTN_3: | |
251 | case BTN_BACK: | |
252 | case BTN_SIDE: index = 3; break; | |
253 | ||
254 | case BTN_4: | |
255 | case BTN_EXTRA: index = 4; break; | |
256 | ||
257 | default: return; | |
1da177e4 LT |
258 | } |
259 | ||
260 | if (value) { | |
261 | set_bit(index, &mousedev->packet.buttons); | |
9657d75c | 262 | set_bit(index, &mousedev_mix->packet.buttons); |
1da177e4 LT |
263 | } else { |
264 | clear_bit(index, &mousedev->packet.buttons); | |
9657d75c | 265 | clear_bit(index, &mousedev_mix->packet.buttons); |
1da177e4 LT |
266 | } |
267 | } | |
268 | ||
464b2415 DT |
269 | static void mousedev_notify_readers(struct mousedev *mousedev, |
270 | struct mousedev_hw_data *packet) | |
1da177e4 | 271 | { |
d0ffb9be | 272 | struct mousedev_client *client; |
1da177e4 | 273 | struct mousedev_motion *p; |
464b2415 | 274 | unsigned int new_head; |
8121152c | 275 | int wake_readers = 0; |
1da177e4 | 276 | |
82ba56c2 | 277 | rcu_read_lock(); |
464b2415 DT |
278 | list_for_each_entry_rcu(client, &mousedev->client_list, node) { |
279 | ||
280 | /* Just acquire the lock, interrupts already disabled */ | |
281 | spin_lock(&client->packet_lock); | |
1da177e4 | 282 | |
d0ffb9be DT |
283 | p = &client->packets[client->head]; |
284 | if (client->ready && p->buttons != mousedev->packet.buttons) { | |
464b2415 | 285 | new_head = (client->head + 1) % PACKET_QUEUE_LEN; |
d0ffb9be DT |
286 | if (new_head != client->tail) { |
287 | p = &client->packets[client->head = new_head]; | |
1da177e4 LT |
288 | memset(p, 0, sizeof(struct mousedev_motion)); |
289 | } | |
290 | } | |
291 | ||
292 | if (packet->abs_event) { | |
d0ffb9be DT |
293 | p->dx += packet->x - client->pos_x; |
294 | p->dy += packet->y - client->pos_y; | |
295 | client->pos_x = packet->x; | |
296 | client->pos_y = packet->y; | |
1da177e4 LT |
297 | } |
298 | ||
d0ffb9be | 299 | client->pos_x += packet->dx; |
464b2415 DT |
300 | client->pos_x = client->pos_x < 0 ? |
301 | 0 : (client->pos_x >= xres ? xres : client->pos_x); | |
d0ffb9be | 302 | client->pos_y += packet->dy; |
464b2415 DT |
303 | client->pos_y = client->pos_y < 0 ? |
304 | 0 : (client->pos_y >= yres ? yres : client->pos_y); | |
1da177e4 LT |
305 | |
306 | p->dx += packet->dx; | |
307 | p->dy += packet->dy; | |
308 | p->dz += packet->dz; | |
309 | p->buttons = mousedev->packet.buttons; | |
310 | ||
464b2415 DT |
311 | if (p->dx || p->dy || p->dz || |
312 | p->buttons != client->last_buttons) | |
d0ffb9be | 313 | client->ready = 1; |
1da177e4 | 314 | |
464b2415 | 315 | spin_unlock(&client->packet_lock); |
c1e4c8d3 | 316 | |
d0ffb9be DT |
317 | if (client->ready) { |
318 | kill_fasync(&client->fasync, SIGIO, POLL_IN); | |
8121152c DT |
319 | wake_readers = 1; |
320 | } | |
1da177e4 | 321 | } |
82ba56c2 | 322 | rcu_read_unlock(); |
1da177e4 | 323 | |
8121152c DT |
324 | if (wake_readers) |
325 | wake_up_interruptible(&mousedev->wait); | |
1da177e4 LT |
326 | } |
327 | ||
328 | static void mousedev_touchpad_touch(struct mousedev *mousedev, int value) | |
329 | { | |
330 | if (!value) { | |
331 | if (mousedev->touch && | |
464b2415 DT |
332 | time_before(jiffies, |
333 | mousedev->touch + msecs_to_jiffies(tap_time))) { | |
1da177e4 LT |
334 | /* |
335 | * Toggle left button to emulate tap. | |
336 | * We rely on the fact that mousedev_mix always has 0 | |
337 | * motion packet so we won't mess current position. | |
338 | */ | |
339 | set_bit(0, &mousedev->packet.buttons); | |
9657d75c DT |
340 | set_bit(0, &mousedev_mix->packet.buttons); |
341 | mousedev_notify_readers(mousedev, &mousedev_mix->packet); | |
464b2415 DT |
342 | mousedev_notify_readers(mousedev_mix, |
343 | &mousedev_mix->packet); | |
1da177e4 | 344 | clear_bit(0, &mousedev->packet.buttons); |
9657d75c | 345 | clear_bit(0, &mousedev_mix->packet.buttons); |
1da177e4 LT |
346 | } |
347 | mousedev->touch = mousedev->pkt_count = 0; | |
348 | mousedev->frac_dx = 0; | |
349 | mousedev->frac_dy = 0; | |
1e0afb28 DT |
350 | |
351 | } else if (!mousedev->touch) | |
352 | mousedev->touch = jiffies; | |
1da177e4 LT |
353 | } |
354 | ||
464b2415 DT |
355 | static void mousedev_event(struct input_handle *handle, |
356 | unsigned int type, unsigned int code, int value) | |
1da177e4 LT |
357 | { |
358 | struct mousedev *mousedev = handle->private; | |
359 | ||
360 | switch (type) { | |
1da177e4 | 361 | |
464b2415 DT |
362 | case EV_ABS: |
363 | /* Ignore joysticks */ | |
364 | if (test_bit(BTN_TRIGGER, handle->dev->keybit)) | |
365 | return; | |
1da177e4 | 366 | |
464b2415 DT |
367 | if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) |
368 | mousedev_touchpad_event(handle->dev, | |
369 | mousedev, code, value); | |
370 | else | |
371 | mousedev_abs_event(handle->dev, mousedev, code, value); | |
1da177e4 | 372 | |
464b2415 | 373 | break; |
1da177e4 | 374 | |
464b2415 DT |
375 | case EV_REL: |
376 | mousedev_rel_event(mousedev, code, value); | |
377 | break; | |
1da177e4 | 378 | |
464b2415 DT |
379 | case EV_KEY: |
380 | if (value != 2) { | |
381 | if (code == BTN_TOUCH && | |
382 | test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) | |
383 | mousedev_touchpad_touch(mousedev, value); | |
384 | else | |
385 | mousedev_key_event(mousedev, code, value); | |
386 | } | |
387 | break; | |
388 | ||
389 | case EV_SYN: | |
390 | if (code == SYN_REPORT) { | |
391 | if (mousedev->touch) { | |
392 | mousedev->pkt_count++; | |
393 | /* | |
394 | * Input system eats duplicate events, | |
395 | * but we need all of them to do correct | |
396 | * averaging so apply present one forward | |
397 | */ | |
398 | fx(0) = fx(1); | |
399 | fy(0) = fy(1); | |
1da177e4 | 400 | } |
464b2415 DT |
401 | |
402 | mousedev_notify_readers(mousedev, &mousedev->packet); | |
403 | mousedev_notify_readers(mousedev_mix, &mousedev->packet); | |
404 | ||
405 | mousedev->packet.dx = mousedev->packet.dy = | |
406 | mousedev->packet.dz = 0; | |
407 | mousedev->packet.abs_event = 0; | |
408 | } | |
409 | break; | |
1da177e4 LT |
410 | } |
411 | } | |
412 | ||
413 | static int mousedev_fasync(int fd, struct file *file, int on) | |
414 | { | |
d0ffb9be | 415 | struct mousedev_client *client = file->private_data; |
1e0afb28 | 416 | |
60aa4924 | 417 | return fasync_helper(fd, file, on, &client->fasync); |
1da177e4 LT |
418 | } |
419 | ||
9657d75c | 420 | static void mousedev_free(struct device *dev) |
1da177e4 | 421 | { |
9657d75c DT |
422 | struct mousedev *mousedev = container_of(dev, struct mousedev, dev); |
423 | ||
a7097ff8 | 424 | input_put_device(mousedev->handle.dev); |
1da177e4 LT |
425 | kfree(mousedev); |
426 | } | |
427 | ||
464b2415 | 428 | static int mousedev_open_device(struct mousedev *mousedev) |
1da177e4 | 429 | { |
464b2415 | 430 | int retval; |
1da177e4 | 431 | |
464b2415 DT |
432 | retval = mutex_lock_interruptible(&mousedev->mutex); |
433 | if (retval) | |
434 | return retval; | |
d542ed82 | 435 | |
464b2415 DT |
436 | if (mousedev->minor == MOUSEDEV_MIX) |
437 | mixdev_open_devices(); | |
438 | else if (!mousedev->exist) | |
439 | retval = -ENODEV; | |
06445014 | 440 | else if (!mousedev->open++) { |
464b2415 | 441 | retval = input_open_device(&mousedev->handle); |
06445014 ON |
442 | if (retval) |
443 | mousedev->open--; | |
444 | } | |
d542ed82 | 445 | |
464b2415 DT |
446 | mutex_unlock(&mousedev->mutex); |
447 | return retval; | |
d542ed82 DT |
448 | } |
449 | ||
464b2415 | 450 | static void mousedev_close_device(struct mousedev *mousedev) |
d542ed82 | 451 | { |
464b2415 | 452 | mutex_lock(&mousedev->mutex); |
d542ed82 | 453 | |
464b2415 DT |
454 | if (mousedev->minor == MOUSEDEV_MIX) |
455 | mixdev_close_devices(); | |
456 | else if (mousedev->exist && !--mousedev->open) | |
457 | input_close_device(&mousedev->handle); | |
458 | ||
459 | mutex_unlock(&mousedev->mutex); | |
d542ed82 DT |
460 | } |
461 | ||
464b2415 DT |
462 | /* |
463 | * Open all available devices so they can all be multiplexed in one. | |
464 | * stream. Note that this function is called with mousedev_mix->mutex | |
465 | * held. | |
466 | */ | |
d542ed82 DT |
467 | static void mixdev_open_devices(void) |
468 | { | |
469 | struct mousedev *mousedev; | |
470 | ||
9657d75c DT |
471 | if (mousedev_mix->open++) |
472 | return; | |
473 | ||
d542ed82 | 474 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { |
9657d75c | 475 | if (!mousedev->mixdev_open) { |
464b2415 DT |
476 | if (mousedev_open_device(mousedev)) |
477 | continue; | |
d542ed82 | 478 | |
9657d75c | 479 | mousedev->mixdev_open = 1; |
1da177e4 LT |
480 | } |
481 | } | |
1da177e4 LT |
482 | } |
483 | ||
464b2415 DT |
484 | /* |
485 | * Close all devices that were opened as part of multiplexed | |
486 | * device. Note that this function is called with mousedev_mix->mutex | |
487 | * held. | |
488 | */ | |
d542ed82 | 489 | static void mixdev_close_devices(void) |
1da177e4 | 490 | { |
9657d75c | 491 | struct mousedev *mousedev; |
d542ed82 | 492 | |
9657d75c DT |
493 | if (--mousedev_mix->open) |
494 | return; | |
495 | ||
496 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { | |
d542ed82 DT |
497 | if (mousedev->mixdev_open) { |
498 | mousedev->mixdev_open = 0; | |
464b2415 | 499 | mousedev_close_device(mousedev); |
1da177e4 LT |
500 | } |
501 | } | |
1da177e4 LT |
502 | } |
503 | ||
464b2415 DT |
504 | |
505 | static void mousedev_attach_client(struct mousedev *mousedev, | |
506 | struct mousedev_client *client) | |
507 | { | |
508 | spin_lock(&mousedev->client_lock); | |
509 | list_add_tail_rcu(&client->node, &mousedev->client_list); | |
510 | spin_unlock(&mousedev->client_lock); | |
464b2415 DT |
511 | } |
512 | ||
513 | static void mousedev_detach_client(struct mousedev *mousedev, | |
514 | struct mousedev_client *client) | |
515 | { | |
516 | spin_lock(&mousedev->client_lock); | |
517 | list_del_rcu(&client->node); | |
518 | spin_unlock(&mousedev->client_lock); | |
82ba56c2 | 519 | synchronize_rcu(); |
464b2415 DT |
520 | } |
521 | ||
d0ffb9be | 522 | static int mousedev_release(struct inode *inode, struct file *file) |
1da177e4 | 523 | { |
d0ffb9be DT |
524 | struct mousedev_client *client = file->private_data; |
525 | struct mousedev *mousedev = client->mousedev; | |
1da177e4 | 526 | |
464b2415 | 527 | mousedev_detach_client(mousedev, client); |
d0ffb9be | 528 | kfree(client); |
1da177e4 | 529 | |
464b2415 | 530 | mousedev_close_device(mousedev); |
9657d75c | 531 | put_device(&mousedev->dev); |
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 | int i; |
542 | ||
543 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
544 | if (imajor(inode) == MISC_MAJOR) | |
545 | i = MOUSEDEV_MIX; | |
546 | else | |
547 | #endif | |
548 | i = iminor(inode) - MOUSEDEV_MINOR_BASE; | |
549 | ||
d0ffb9be | 550 | if (i >= MOUSEDEV_MINORS) |
1da177e4 LT |
551 | return -ENODEV; |
552 | ||
464b2415 | 553 | error = mutex_lock_interruptible(&mousedev_table_mutex); |
41091ad0 | 554 | if (error) |
464b2415 | 555 | return error; |
41091ad0 | 556 | |
d0ffb9be | 557 | mousedev = mousedev_table[i]; |
464b2415 DT |
558 | if (mousedev) |
559 | get_device(&mousedev->dev); | |
560 | mutex_unlock(&mousedev_table_mutex); | |
561 | ||
41091ad0 | 562 | if (!mousedev) |
1da177e4 LT |
563 | return -ENODEV; |
564 | ||
d0ffb9be | 565 | client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL); |
9657d75c DT |
566 | if (!client) { |
567 | error = -ENOMEM; | |
568 | goto err_put_mousedev; | |
569 | } | |
1da177e4 | 570 | |
d0ffb9be DT |
571 | spin_lock_init(&client->packet_lock); |
572 | client->pos_x = xres / 2; | |
573 | client->pos_y = yres / 2; | |
574 | client->mousedev = mousedev; | |
464b2415 | 575 | mousedev_attach_client(mousedev, client); |
1da177e4 | 576 | |
464b2415 DT |
577 | error = mousedev_open_device(mousedev); |
578 | if (error) | |
579 | goto err_free_client; | |
1da177e4 | 580 | |
d0ffb9be | 581 | file->private_data = client; |
1da177e4 | 582 | return 0; |
9657d75c DT |
583 | |
584 | err_free_client: | |
464b2415 | 585 | mousedev_detach_client(mousedev, client); |
9657d75c DT |
586 | kfree(client); |
587 | err_put_mousedev: | |
588 | put_device(&mousedev->dev); | |
589 | return error; | |
1da177e4 LT |
590 | } |
591 | ||
592 | static inline int mousedev_limit_delta(int delta, int limit) | |
593 | { | |
594 | return delta > limit ? limit : (delta < -limit ? -limit : delta); | |
595 | } | |
596 | ||
464b2415 DT |
597 | static void mousedev_packet(struct mousedev_client *client, |
598 | signed char *ps2_data) | |
1da177e4 | 599 | { |
464b2415 | 600 | struct mousedev_motion *p = &client->packets[client->tail]; |
1da177e4 | 601 | |
464b2415 DT |
602 | ps2_data[0] = 0x08 | |
603 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07); | |
1da177e4 LT |
604 | ps2_data[1] = mousedev_limit_delta(p->dx, 127); |
605 | ps2_data[2] = mousedev_limit_delta(p->dy, 127); | |
606 | p->dx -= ps2_data[1]; | |
607 | p->dy -= ps2_data[2]; | |
608 | ||
d0ffb9be | 609 | switch (client->mode) { |
464b2415 DT |
610 | case MOUSEDEV_EMUL_EXPS: |
611 | ps2_data[3] = mousedev_limit_delta(p->dz, 7); | |
612 | p->dz -= ps2_data[3]; | |
613 | ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1); | |
614 | client->bufsiz = 4; | |
615 | break; | |
616 | ||
617 | case MOUSEDEV_EMUL_IMPS: | |
618 | ps2_data[0] |= | |
619 | ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); | |
620 | ps2_data[3] = mousedev_limit_delta(p->dz, 127); | |
621 | p->dz -= ps2_data[3]; | |
622 | client->bufsiz = 4; | |
623 | break; | |
624 | ||
625 | case MOUSEDEV_EMUL_PS2: | |
626 | default: | |
627 | ps2_data[0] |= | |
628 | ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); | |
629 | p->dz = 0; | |
630 | client->bufsiz = 3; | |
631 | break; | |
1da177e4 LT |
632 | } |
633 | ||
634 | if (!p->dx && !p->dy && !p->dz) { | |
d0ffb9be DT |
635 | if (client->tail == client->head) { |
636 | client->ready = 0; | |
637 | client->last_buttons = p->buttons; | |
c1e4c8d3 | 638 | } else |
d0ffb9be | 639 | client->tail = (client->tail + 1) % PACKET_QUEUE_LEN; |
1da177e4 | 640 | } |
1da177e4 LT |
641 | } |
642 | ||
464b2415 DT |
643 | static void mousedev_generate_response(struct mousedev_client *client, |
644 | int command) | |
645 | { | |
646 | client->ps2[0] = 0xfa; /* ACK */ | |
1da177e4 | 647 | |
464b2415 DT |
648 | switch (command) { |
649 | ||
650 | case 0xeb: /* Poll */ | |
651 | mousedev_packet(client, &client->ps2[1]); | |
652 | client->bufsiz++; /* account for leading ACK */ | |
653 | break; | |
654 | ||
655 | case 0xf2: /* Get ID */ | |
656 | switch (client->mode) { | |
657 | case MOUSEDEV_EMUL_PS2: | |
658 | client->ps2[1] = 0; | |
659 | break; | |
660 | case MOUSEDEV_EMUL_IMPS: | |
661 | client->ps2[1] = 3; | |
662 | break; | |
663 | case MOUSEDEV_EMUL_EXPS: | |
664 | client->ps2[1] = 4; | |
665 | break; | |
666 | } | |
667 | client->bufsiz = 2; | |
668 | break; | |
669 | ||
670 | case 0xe9: /* Get info */ | |
671 | client->ps2[1] = 0x60; client->ps2[2] = 3; client->ps2[3] = 200; | |
672 | client->bufsiz = 4; | |
673 | break; | |
674 | ||
675 | case 0xff: /* Reset */ | |
676 | client->impsseq = client->imexseq = 0; | |
677 | client->mode = MOUSEDEV_EMUL_PS2; | |
678 | client->ps2[1] = 0xaa; client->ps2[2] = 0x00; | |
679 | client->bufsiz = 3; | |
680 | break; | |
681 | ||
682 | default: | |
683 | client->bufsiz = 1; | |
684 | break; | |
685 | } | |
686 | client->buffer = client->bufsiz; | |
687 | } | |
688 | ||
689 | static ssize_t mousedev_write(struct file *file, const char __user *buffer, | |
690 | size_t count, loff_t *ppos) | |
1da177e4 | 691 | { |
d0ffb9be | 692 | struct mousedev_client *client = file->private_data; |
1da177e4 LT |
693 | unsigned char c; |
694 | unsigned int i; | |
695 | ||
696 | for (i = 0; i < count; i++) { | |
697 | ||
698 | if (get_user(c, buffer + i)) | |
699 | return -EFAULT; | |
700 | ||
464b2415 DT |
701 | spin_lock_irq(&client->packet_lock); |
702 | ||
d0ffb9be DT |
703 | if (c == mousedev_imex_seq[client->imexseq]) { |
704 | if (++client->imexseq == MOUSEDEV_SEQ_LEN) { | |
705 | client->imexseq = 0; | |
706 | client->mode = MOUSEDEV_EMUL_EXPS; | |
1da177e4 | 707 | } |
1e0afb28 | 708 | } else |
d0ffb9be | 709 | client->imexseq = 0; |
1da177e4 | 710 | |
d0ffb9be DT |
711 | if (c == mousedev_imps_seq[client->impsseq]) { |
712 | if (++client->impsseq == MOUSEDEV_SEQ_LEN) { | |
713 | client->impsseq = 0; | |
714 | client->mode = MOUSEDEV_EMUL_IMPS; | |
1da177e4 | 715 | } |
1e0afb28 | 716 | } else |
d0ffb9be | 717 | client->impsseq = 0; |
1da177e4 | 718 | |
464b2415 | 719 | mousedev_generate_response(client, c); |
1da177e4 | 720 | |
464b2415 | 721 | spin_unlock_irq(&client->packet_lock); |
1da177e4 LT |
722 | } |
723 | ||
d0ffb9be | 724 | kill_fasync(&client->fasync, SIGIO, POLL_IN); |
d0ffb9be | 725 | wake_up_interruptible(&client->mousedev->wait); |
1da177e4 LT |
726 | |
727 | return count; | |
728 | } | |
729 | ||
464b2415 DT |
730 | static ssize_t mousedev_read(struct file *file, char __user *buffer, |
731 | size_t count, loff_t *ppos) | |
1da177e4 | 732 | { |
d0ffb9be | 733 | struct mousedev_client *client = file->private_data; |
464b2415 DT |
734 | struct mousedev *mousedev = client->mousedev; |
735 | signed char data[sizeof(client->ps2)]; | |
1da177e4 LT |
736 | int retval = 0; |
737 | ||
464b2415 DT |
738 | if (!client->ready && !client->buffer && mousedev->exist && |
739 | (file->f_flags & O_NONBLOCK)) | |
1da177e4 LT |
740 | return -EAGAIN; |
741 | ||
464b2415 DT |
742 | retval = wait_event_interruptible(mousedev->wait, |
743 | !mousedev->exist || client->ready || client->buffer); | |
1da177e4 LT |
744 | if (retval) |
745 | return retval; | |
746 | ||
464b2415 | 747 | if (!mousedev->exist) |
1da177e4 LT |
748 | return -ENODEV; |
749 | ||
464b2415 DT |
750 | spin_lock_irq(&client->packet_lock); |
751 | ||
d0ffb9be DT |
752 | if (!client->buffer && client->ready) { |
753 | mousedev_packet(client, client->ps2); | |
754 | client->buffer = client->bufsiz; | |
1da177e4 LT |
755 | } |
756 | ||
d0ffb9be DT |
757 | if (count > client->buffer) |
758 | count = client->buffer; | |
1da177e4 | 759 | |
464b2415 | 760 | memcpy(data, client->ps2 + client->bufsiz - client->buffer, count); |
d0ffb9be | 761 | client->buffer -= count; |
1da177e4 | 762 | |
464b2415 DT |
763 | spin_unlock_irq(&client->packet_lock); |
764 | ||
765 | if (copy_to_user(buffer, data, count)) | |
1da177e4 LT |
766 | return -EFAULT; |
767 | ||
768 | return count; | |
769 | } | |
770 | ||
771 | /* No kernel lock - fine */ | |
772 | static unsigned int mousedev_poll(struct file *file, poll_table *wait) | |
773 | { | |
d0ffb9be DT |
774 | struct mousedev_client *client = file->private_data; |
775 | struct mousedev *mousedev = client->mousedev; | |
4d4bf995 | 776 | unsigned int mask; |
1e0afb28 | 777 | |
d0ffb9be | 778 | poll_wait(file, &mousedev->wait, wait); |
4d4bf995 JM |
779 | |
780 | mask = mousedev->exist ? POLLOUT | POLLWRNORM : POLLHUP | POLLERR; | |
781 | if (client->ready || client->buffer) | |
782 | mask |= POLLIN | POLLRDNORM; | |
783 | ||
784 | return mask; | |
1da177e4 LT |
785 | } |
786 | ||
66e66118 | 787 | static const struct file_operations mousedev_fops = { |
1da177e4 LT |
788 | .owner = THIS_MODULE, |
789 | .read = mousedev_read, | |
790 | .write = mousedev_write, | |
791 | .poll = mousedev_poll, | |
792 | .open = mousedev_open, | |
793 | .release = mousedev_release, | |
794 | .fasync = mousedev_fasync, | |
6038f373 | 795 | .llseek = noop_llseek, |
1da177e4 LT |
796 | }; |
797 | ||
464b2415 DT |
798 | static int mousedev_install_chrdev(struct mousedev *mousedev) |
799 | { | |
800 | mousedev_table[mousedev->minor] = mousedev; | |
801 | return 0; | |
802 | } | |
803 | ||
804 | static void mousedev_remove_chrdev(struct mousedev *mousedev) | |
805 | { | |
806 | mutex_lock(&mousedev_table_mutex); | |
807 | mousedev_table[mousedev->minor] = NULL; | |
808 | mutex_unlock(&mousedev_table_mutex); | |
809 | } | |
810 | ||
811 | /* | |
812 | * Mark device non-existent. This disables writes, ioctls and | |
813 | * prevents new users from opening the device. Already posted | |
814 | * blocking reads will stay, however new ones will fail. | |
815 | */ | |
816 | static void mousedev_mark_dead(struct mousedev *mousedev) | |
817 | { | |
818 | mutex_lock(&mousedev->mutex); | |
20da92de | 819 | mousedev->exist = false; |
464b2415 DT |
820 | mutex_unlock(&mousedev->mutex); |
821 | } | |
822 | ||
823 | /* | |
824 | * Wake up users waiting for IO so they can disconnect from | |
825 | * dead device. | |
826 | */ | |
827 | static void mousedev_hangup(struct mousedev *mousedev) | |
828 | { | |
829 | struct mousedev_client *client; | |
830 | ||
831 | spin_lock(&mousedev->client_lock); | |
832 | list_for_each_entry(client, &mousedev->client_list, node) | |
833 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
834 | spin_unlock(&mousedev->client_lock); | |
835 | ||
836 | wake_up_interruptible(&mousedev->wait); | |
837 | } | |
838 | ||
839 | static void mousedev_cleanup(struct mousedev *mousedev) | |
840 | { | |
841 | struct input_handle *handle = &mousedev->handle; | |
842 | ||
843 | mousedev_mark_dead(mousedev); | |
844 | mousedev_hangup(mousedev); | |
845 | mousedev_remove_chrdev(mousedev); | |
846 | ||
847 | /* mousedev is marked dead so no one else accesses mousedev->open */ | |
848 | if (mousedev->open) | |
849 | input_close_device(handle); | |
850 | } | |
851 | ||
9657d75c DT |
852 | static struct mousedev *mousedev_create(struct input_dev *dev, |
853 | struct input_handler *handler, | |
854 | int minor) | |
1da177e4 LT |
855 | { |
856 | struct mousedev *mousedev; | |
5b2a0826 | 857 | int error; |
1da177e4 | 858 | |
5b2a0826 | 859 | mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL); |
9657d75c DT |
860 | if (!mousedev) { |
861 | error = -ENOMEM; | |
862 | goto err_out; | |
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, | |
f74eef95 | 870 | minor == MOUSEDEV_MIX ? SINGLE_DEPTH_NESTING : 0); |
1da177e4 LT |
871 | init_waitqueue_head(&mousedev->wait); |
872 | ||
9657d75c | 873 | if (minor == MOUSEDEV_MIX) |
3d5cb60e | 874 | dev_set_name(&mousedev->dev, "mice"); |
9657d75c | 875 | else |
3d5cb60e | 876 | dev_set_name(&mousedev->dev, "mouse%d", minor); |
9657d75c | 877 | |
1da177e4 | 878 | mousedev->minor = minor; |
20da92de | 879 | mousedev->exist = true; |
a7097ff8 | 880 | mousedev->handle.dev = input_get_device(dev); |
3d5cb60e | 881 | mousedev->handle.name = dev_name(&mousedev->dev); |
1da177e4 LT |
882 | mousedev->handle.handler = handler; |
883 | mousedev->handle.private = mousedev; | |
1da177e4 | 884 | |
9657d75c DT |
885 | mousedev->dev.class = &input_class; |
886 | if (dev) | |
887 | mousedev->dev.parent = &dev->dev; | |
888 | mousedev->dev.devt = MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor); | |
889 | mousedev->dev.release = mousedev_free; | |
890 | device_initialize(&mousedev->dev); | |
1da177e4 | 891 | |
464b2415 DT |
892 | if (minor != MOUSEDEV_MIX) { |
893 | error = input_register_handle(&mousedev->handle); | |
894 | if (error) | |
895 | goto err_free_mousedev; | |
896 | } | |
897 | ||
898 | error = mousedev_install_chrdev(mousedev); | |
899 | if (error) | |
900 | goto err_unregister_handle; | |
5b2a0826 | 901 | |
9657d75c DT |
902 | error = device_add(&mousedev->dev); |
903 | if (error) | |
464b2415 | 904 | goto err_cleanup_mousedev; |
9657d75c DT |
905 | |
906 | return mousedev; | |
907 | ||
464b2415 DT |
908 | err_cleanup_mousedev: |
909 | mousedev_cleanup(mousedev); | |
910 | err_unregister_handle: | |
911 | if (minor != MOUSEDEV_MIX) | |
912 | input_unregister_handle(&mousedev->handle); | |
9657d75c DT |
913 | err_free_mousedev: |
914 | put_device(&mousedev->dev); | |
915 | err_out: | |
916 | return ERR_PTR(error); | |
917 | } | |
918 | ||
919 | static void mousedev_destroy(struct mousedev *mousedev) | |
920 | { | |
9657d75c | 921 | device_del(&mousedev->dev); |
464b2415 DT |
922 | mousedev_cleanup(mousedev); |
923 | if (mousedev->minor != MOUSEDEV_MIX) | |
924 | input_unregister_handle(&mousedev->handle); | |
925 | put_device(&mousedev->dev); | |
926 | } | |
9657d75c | 927 | |
464b2415 DT |
928 | static int mixdev_add_device(struct mousedev *mousedev) |
929 | { | |
930 | int retval; | |
931 | ||
932 | retval = mutex_lock_interruptible(&mousedev_mix->mutex); | |
933 | if (retval) | |
934 | return retval; | |
935 | ||
936 | if (mousedev_mix->open) { | |
937 | retval = mousedev_open_device(mousedev); | |
938 | if (retval) | |
939 | goto out; | |
940 | ||
941 | mousedev->mixdev_open = 1; | |
5b2a0826 | 942 | } |
c9bcd582 | 943 | |
464b2415 DT |
944 | get_device(&mousedev->dev); |
945 | list_add_tail(&mousedev->mixdev_node, &mousedev_mix_list); | |
946 | ||
947 | out: | |
948 | mutex_unlock(&mousedev_mix->mutex); | |
949 | return retval; | |
950 | } | |
951 | ||
952 | static void mixdev_remove_device(struct mousedev *mousedev) | |
953 | { | |
954 | mutex_lock(&mousedev_mix->mutex); | |
955 | ||
956 | if (mousedev->mixdev_open) { | |
957 | mousedev->mixdev_open = 0; | |
958 | mousedev_close_device(mousedev); | |
959 | } | |
960 | ||
961 | list_del_init(&mousedev->mixdev_node); | |
962 | mutex_unlock(&mousedev_mix->mutex); | |
963 | ||
9657d75c DT |
964 | put_device(&mousedev->dev); |
965 | } | |
966 | ||
464b2415 DT |
967 | static int mousedev_connect(struct input_handler *handler, |
968 | struct input_dev *dev, | |
9657d75c DT |
969 | const struct input_device_id *id) |
970 | { | |
971 | struct mousedev *mousedev; | |
972 | int minor; | |
973 | int error; | |
974 | ||
464b2415 DT |
975 | for (minor = 0; minor < MOUSEDEV_MINORS; minor++) |
976 | if (!mousedev_table[minor]) | |
977 | break; | |
978 | ||
9657d75c | 979 | if (minor == MOUSEDEV_MINORS) { |
da0c4901 | 980 | pr_err("no more free mousedev devices\n"); |
9657d75c DT |
981 | return -ENFILE; |
982 | } | |
983 | ||
984 | mousedev = mousedev_create(dev, handler, minor); | |
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 = { | |
1057 | .event = mousedev_event, | |
1058 | .connect = mousedev_connect, | |
1059 | .disconnect = mousedev_disconnect, | |
1060 | .fops = &mousedev_fops, | |
1061 | .minor = MOUSEDEV_MINOR_BASE, | |
1062 | .name = "mousedev", | |
1063 | .id_table = mousedev_ids, | |
1064 | }; | |
1065 | ||
1066 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
1067 | static struct miscdevice psaux_mouse = { | |
1068 | PSMOUSE_MINOR, "psaux", &mousedev_fops | |
1069 | }; | |
1070 | static int psaux_registered; | |
1071 | #endif | |
1072 | ||
1073 | static int __init mousedev_init(void) | |
1074 | { | |
4263cf0f DT |
1075 | int error; |
1076 | ||
9657d75c DT |
1077 | mousedev_mix = mousedev_create(NULL, &mousedev_handler, MOUSEDEV_MIX); |
1078 | if (IS_ERR(mousedev_mix)) | |
1079 | return PTR_ERR(mousedev_mix); | |
1080 | ||
4263cf0f | 1081 | error = input_register_handler(&mousedev_handler); |
9657d75c DT |
1082 | if (error) { |
1083 | mousedev_destroy(mousedev_mix); | |
4263cf0f | 1084 | return error; |
4263cf0f | 1085 | } |
1da177e4 LT |
1086 | |
1087 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
4263cf0f DT |
1088 | error = misc_register(&psaux_mouse); |
1089 | if (error) | |
41091ad0 | 1090 | pr_warn("could not register psaux device, error: %d\n", |
da0c4901 | 1091 | error); |
4263cf0f DT |
1092 | else |
1093 | psaux_registered = 1; | |
1da177e4 LT |
1094 | #endif |
1095 | ||
da0c4901 | 1096 | pr_info("PS/2 mouse device common for all mice\n"); |
1da177e4 LT |
1097 | |
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | static void __exit mousedev_exit(void) | |
1102 | { | |
1103 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
1104 | if (psaux_registered) | |
1105 | misc_deregister(&psaux_mouse); | |
1106 | #endif | |
1da177e4 | 1107 | input_unregister_handler(&mousedev_handler); |
9657d75c | 1108 | mousedev_destroy(mousedev_mix); |
1da177e4 LT |
1109 | } |
1110 | ||
1111 | module_init(mousedev_init); | |
1112 | module_exit(mousedev_exit); |