Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Input driver to ExplorerPS/2 device driver module. | |
3 | * | |
4 | * Copyright (c) 1999-2002 Vojtech Pavlik | |
5 | * Copyright (c) 2004 Dmitry Torokhov | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as published by | |
9 | * the Free Software Foundation. | |
10 | */ | |
11 | ||
4f00469c | 12 | #define MOUSEDEV_MINOR_BASE 32 |
1da177e4 LT |
13 | #define MOUSEDEV_MINORS 32 |
14 | #define MOUSEDEV_MIX 31 | |
15 | ||
16 | #include <linux/slab.h> | |
17 | #include <linux/poll.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/moduleparam.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/input.h> | |
1da177e4 LT |
22 | #include <linux/random.h> |
23 | #include <linux/major.h> | |
24 | #include <linux/device.h> | |
1da177e4 LT |
25 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX |
26 | #include <linux/miscdevice.h> | |
27 | #endif | |
28 | ||
29 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
30 | MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces"); | |
31 | MODULE_LICENSE("GPL"); | |
32 | ||
33 | #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X | |
34 | #define CONFIG_INPUT_MOUSEDEV_SCREEN_X 1024 | |
35 | #endif | |
36 | #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y | |
37 | #define CONFIG_INPUT_MOUSEDEV_SCREEN_Y 768 | |
38 | #endif | |
39 | ||
40 | static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X; | |
84c12b24 | 41 | module_param(xres, uint, 0644); |
1da177e4 LT |
42 | MODULE_PARM_DESC(xres, "Horizontal screen resolution"); |
43 | ||
44 | static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y; | |
84c12b24 | 45 | module_param(yres, uint, 0644); |
1da177e4 LT |
46 | MODULE_PARM_DESC(yres, "Vertical screen resolution"); |
47 | ||
48 | static unsigned tap_time = 200; | |
84c12b24 | 49 | module_param(tap_time, uint, 0644); |
1da177e4 LT |
50 | MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)"); |
51 | ||
52 | struct mousedev_hw_data { | |
53 | int dx, dy, dz; | |
54 | int x, y; | |
55 | int abs_event; | |
56 | unsigned long buttons; | |
57 | }; | |
58 | ||
59 | struct mousedev { | |
60 | int exist; | |
61 | int open; | |
62 | int minor; | |
63 | char name[16]; | |
64 | wait_queue_head_t wait; | |
d0ffb9be | 65 | struct list_head client_list; |
1da177e4 LT |
66 | struct input_handle handle; |
67 | ||
d542ed82 DT |
68 | struct list_head mixdev_node; |
69 | int mixdev_open; | |
70 | ||
1da177e4 LT |
71 | struct mousedev_hw_data packet; |
72 | unsigned int pkt_count; | |
73 | int old_x[4], old_y[4]; | |
74 | int frac_dx, frac_dy; | |
75 | unsigned long touch; | |
76 | }; | |
77 | ||
78 | enum mousedev_emul { | |
79 | MOUSEDEV_EMUL_PS2, | |
80 | MOUSEDEV_EMUL_IMPS, | |
81 | MOUSEDEV_EMUL_EXPS | |
82 | }; | |
83 | ||
84 | struct mousedev_motion { | |
85 | int dx, dy, dz; | |
86 | unsigned long buttons; | |
87 | }; | |
88 | ||
89 | #define PACKET_QUEUE_LEN 16 | |
d0ffb9be | 90 | struct mousedev_client { |
1da177e4 LT |
91 | struct fasync_struct *fasync; |
92 | struct mousedev *mousedev; | |
93 | struct list_head node; | |
94 | ||
95 | struct mousedev_motion packets[PACKET_QUEUE_LEN]; | |
96 | unsigned int head, tail; | |
97 | spinlock_t packet_lock; | |
98 | int pos_x, pos_y; | |
99 | ||
100 | signed char ps2[6]; | |
101 | unsigned char ready, buffer, bufsiz; | |
102 | unsigned char imexseq, impsseq; | |
103 | enum mousedev_emul mode; | |
c1e4c8d3 | 104 | unsigned long last_buttons; |
1da177e4 LT |
105 | }; |
106 | ||
107 | #define MOUSEDEV_SEQ_LEN 6 | |
108 | ||
109 | static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 }; | |
110 | static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 }; | |
111 | ||
112 | static struct input_handler mousedev_handler; | |
113 | ||
114 | static struct mousedev *mousedev_table[MOUSEDEV_MINORS]; | |
115 | static struct mousedev mousedev_mix; | |
d542ed82 | 116 | static LIST_HEAD(mousedev_mix_list); |
1da177e4 LT |
117 | |
118 | #define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03]) | |
119 | #define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03]) | |
120 | ||
121 | static void mousedev_touchpad_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value) | |
122 | { | |
123 | int size, tmp; | |
124 | enum { FRACTION_DENOM = 128 }; | |
125 | ||
0d9d93c4 DT |
126 | switch (code) { |
127 | case ABS_X: | |
128 | fx(0) = value; | |
129 | if (mousedev->touch && mousedev->pkt_count >= 2) { | |
130 | size = dev->absmax[ABS_X] - dev->absmin[ABS_X]; | |
131 | if (size == 0) | |
132 | size = 256 * 2; | |
133 | tmp = ((value - fx(2)) * (256 * FRACTION_DENOM)) / size; | |
134 | tmp += mousedev->frac_dx; | |
135 | mousedev->packet.dx = tmp / FRACTION_DENOM; | |
136 | mousedev->frac_dx = tmp - mousedev->packet.dx * FRACTION_DENOM; | |
137 | } | |
138 | break; | |
1da177e4 | 139 | |
0d9d93c4 DT |
140 | case ABS_Y: |
141 | fy(0) = value; | |
142 | if (mousedev->touch && mousedev->pkt_count >= 2) { | |
143 | /* use X size to keep the same scale */ | |
144 | size = dev->absmax[ABS_X] - dev->absmin[ABS_X]; | |
145 | if (size == 0) | |
146 | size = 256 * 2; | |
147 | tmp = -((value - fy(2)) * (256 * FRACTION_DENOM)) / size; | |
148 | tmp += mousedev->frac_dy; | |
149 | mousedev->packet.dy = tmp / FRACTION_DENOM; | |
150 | mousedev->frac_dy = tmp - mousedev->packet.dy * FRACTION_DENOM; | |
151 | } | |
152 | break; | |
1da177e4 LT |
153 | } |
154 | } | |
155 | ||
156 | static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value) | |
157 | { | |
158 | int size; | |
159 | ||
160 | switch (code) { | |
161 | case ABS_X: | |
162 | size = dev->absmax[ABS_X] - dev->absmin[ABS_X]; | |
1e0afb28 DT |
163 | if (size == 0) |
164 | size = xres ? : 1; | |
165 | if (value > dev->absmax[ABS_X]) | |
166 | value = dev->absmax[ABS_X]; | |
167 | if (value < dev->absmin[ABS_X]) | |
168 | value = dev->absmin[ABS_X]; | |
1da177e4 LT |
169 | mousedev->packet.x = ((value - dev->absmin[ABS_X]) * xres) / size; |
170 | mousedev->packet.abs_event = 1; | |
171 | break; | |
172 | ||
173 | case ABS_Y: | |
174 | size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y]; | |
1e0afb28 DT |
175 | if (size == 0) |
176 | size = yres ? : 1; | |
177 | if (value > dev->absmax[ABS_Y]) | |
178 | value = dev->absmax[ABS_Y]; | |
179 | if (value < dev->absmin[ABS_Y]) | |
180 | value = dev->absmin[ABS_Y]; | |
1da177e4 LT |
181 | mousedev->packet.y = yres - ((value - dev->absmin[ABS_Y]) * yres) / size; |
182 | mousedev->packet.abs_event = 1; | |
183 | break; | |
184 | } | |
185 | } | |
186 | ||
187 | static void mousedev_rel_event(struct mousedev *mousedev, unsigned int code, int value) | |
188 | { | |
189 | switch (code) { | |
190 | case REL_X: mousedev->packet.dx += value; break; | |
191 | case REL_Y: mousedev->packet.dy -= value; break; | |
192 | case REL_WHEEL: mousedev->packet.dz -= value; break; | |
193 | } | |
194 | } | |
195 | ||
196 | static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int value) | |
197 | { | |
198 | int index; | |
199 | ||
200 | switch (code) { | |
201 | case BTN_TOUCH: | |
202 | case BTN_0: | |
1da177e4 LT |
203 | case BTN_LEFT: index = 0; break; |
204 | case BTN_STYLUS: | |
205 | case BTN_1: | |
206 | case BTN_RIGHT: index = 1; break; | |
207 | case BTN_2: | |
6c595fb1 | 208 | case BTN_FORWARD: |
1da177e4 LT |
209 | case BTN_STYLUS2: |
210 | case BTN_MIDDLE: index = 2; break; | |
211 | case BTN_3: | |
212 | case BTN_BACK: | |
213 | case BTN_SIDE: index = 3; break; | |
214 | case BTN_4: | |
215 | case BTN_EXTRA: index = 4; break; | |
1e0afb28 | 216 | default: return; |
1da177e4 LT |
217 | } |
218 | ||
219 | if (value) { | |
220 | set_bit(index, &mousedev->packet.buttons); | |
221 | set_bit(index, &mousedev_mix.packet.buttons); | |
222 | } else { | |
223 | clear_bit(index, &mousedev->packet.buttons); | |
224 | clear_bit(index, &mousedev_mix.packet.buttons); | |
225 | } | |
226 | } | |
227 | ||
228 | static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet) | |
229 | { | |
d0ffb9be | 230 | struct mousedev_client *client; |
1da177e4 LT |
231 | struct mousedev_motion *p; |
232 | unsigned long flags; | |
8121152c | 233 | int wake_readers = 0; |
1da177e4 | 234 | |
d0ffb9be DT |
235 | list_for_each_entry(client, &mousedev->client_list, node) { |
236 | spin_lock_irqsave(&client->packet_lock, flags); | |
1da177e4 | 237 | |
d0ffb9be DT |
238 | p = &client->packets[client->head]; |
239 | if (client->ready && p->buttons != mousedev->packet.buttons) { | |
240 | unsigned int new_head = (client->head + 1) % PACKET_QUEUE_LEN; | |
241 | if (new_head != client->tail) { | |
242 | p = &client->packets[client->head = new_head]; | |
1da177e4 LT |
243 | memset(p, 0, sizeof(struct mousedev_motion)); |
244 | } | |
245 | } | |
246 | ||
247 | if (packet->abs_event) { | |
d0ffb9be DT |
248 | p->dx += packet->x - client->pos_x; |
249 | p->dy += packet->y - client->pos_y; | |
250 | client->pos_x = packet->x; | |
251 | client->pos_y = packet->y; | |
1da177e4 LT |
252 | } |
253 | ||
d0ffb9be DT |
254 | client->pos_x += packet->dx; |
255 | client->pos_x = client->pos_x < 0 ? 0 : (client->pos_x >= xres ? xres : client->pos_x); | |
256 | client->pos_y += packet->dy; | |
257 | client->pos_y = client->pos_y < 0 ? 0 : (client->pos_y >= yres ? yres : client->pos_y); | |
1da177e4 LT |
258 | |
259 | p->dx += packet->dx; | |
260 | p->dy += packet->dy; | |
261 | p->dz += packet->dz; | |
262 | p->buttons = mousedev->packet.buttons; | |
263 | ||
d0ffb9be DT |
264 | if (p->dx || p->dy || p->dz || p->buttons != client->last_buttons) |
265 | client->ready = 1; | |
1da177e4 | 266 | |
d0ffb9be | 267 | spin_unlock_irqrestore(&client->packet_lock, flags); |
c1e4c8d3 | 268 | |
d0ffb9be DT |
269 | if (client->ready) { |
270 | kill_fasync(&client->fasync, SIGIO, POLL_IN); | |
8121152c DT |
271 | wake_readers = 1; |
272 | } | |
1da177e4 LT |
273 | } |
274 | ||
8121152c DT |
275 | if (wake_readers) |
276 | wake_up_interruptible(&mousedev->wait); | |
1da177e4 LT |
277 | } |
278 | ||
279 | static void mousedev_touchpad_touch(struct mousedev *mousedev, int value) | |
280 | { | |
281 | if (!value) { | |
282 | if (mousedev->touch && | |
283 | time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) { | |
284 | /* | |
285 | * Toggle left button to emulate tap. | |
286 | * We rely on the fact that mousedev_mix always has 0 | |
287 | * motion packet so we won't mess current position. | |
288 | */ | |
289 | set_bit(0, &mousedev->packet.buttons); | |
290 | set_bit(0, &mousedev_mix.packet.buttons); | |
291 | mousedev_notify_readers(mousedev, &mousedev_mix.packet); | |
292 | mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet); | |
293 | clear_bit(0, &mousedev->packet.buttons); | |
294 | clear_bit(0, &mousedev_mix.packet.buttons); | |
295 | } | |
296 | mousedev->touch = mousedev->pkt_count = 0; | |
297 | mousedev->frac_dx = 0; | |
298 | mousedev->frac_dy = 0; | |
1e0afb28 DT |
299 | |
300 | } else if (!mousedev->touch) | |
301 | mousedev->touch = jiffies; | |
1da177e4 LT |
302 | } |
303 | ||
304 | static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) | |
305 | { | |
306 | struct mousedev *mousedev = handle->private; | |
307 | ||
308 | switch (type) { | |
309 | case EV_ABS: | |
310 | /* Ignore joysticks */ | |
311 | if (test_bit(BTN_TRIGGER, handle->dev->keybit)) | |
312 | return; | |
313 | ||
314 | if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) | |
315 | mousedev_touchpad_event(handle->dev, mousedev, code, value); | |
316 | else | |
317 | mousedev_abs_event(handle->dev, mousedev, code, value); | |
318 | ||
319 | break; | |
320 | ||
321 | case EV_REL: | |
322 | mousedev_rel_event(mousedev, code, value); | |
323 | break; | |
324 | ||
325 | case EV_KEY: | |
326 | if (value != 2) { | |
327 | if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) | |
328 | mousedev_touchpad_touch(mousedev, value); | |
329 | else | |
330 | mousedev_key_event(mousedev, code, value); | |
331 | } | |
332 | break; | |
333 | ||
334 | case EV_SYN: | |
335 | if (code == SYN_REPORT) { | |
336 | if (mousedev->touch) { | |
337 | mousedev->pkt_count++; | |
338 | /* Input system eats duplicate events, but we need all of them | |
339 | * to do correct averaging so apply present one forward | |
1e0afb28 | 340 | */ |
1da177e4 LT |
341 | fx(0) = fx(1); |
342 | fy(0) = fy(1); | |
343 | } | |
344 | ||
345 | mousedev_notify_readers(mousedev, &mousedev->packet); | |
346 | mousedev_notify_readers(&mousedev_mix, &mousedev->packet); | |
347 | ||
348 | mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0; | |
349 | mousedev->packet.abs_event = 0; | |
350 | } | |
351 | break; | |
352 | } | |
353 | } | |
354 | ||
355 | static int mousedev_fasync(int fd, struct file *file, int on) | |
356 | { | |
357 | int retval; | |
d0ffb9be | 358 | struct mousedev_client *client = file->private_data; |
1e0afb28 | 359 | |
d0ffb9be | 360 | retval = fasync_helper(fd, file, on, &client->fasync); |
1e0afb28 | 361 | |
1da177e4 LT |
362 | return retval < 0 ? retval : 0; |
363 | } | |
364 | ||
365 | static void mousedev_free(struct mousedev *mousedev) | |
366 | { | |
367 | mousedev_table[mousedev->minor] = NULL; | |
368 | kfree(mousedev); | |
369 | } | |
370 | ||
d542ed82 | 371 | static int mixdev_add_device(struct mousedev *mousedev) |
1da177e4 | 372 | { |
d542ed82 | 373 | int error; |
1da177e4 | 374 | |
d542ed82 DT |
375 | if (mousedev_mix.open) { |
376 | error = input_open_device(&mousedev->handle); | |
377 | if (error) | |
378 | return error; | |
1da177e4 | 379 | |
d542ed82 DT |
380 | mousedev->open++; |
381 | mousedev->mixdev_open++; | |
382 | } | |
383 | ||
384 | list_add_tail(&mousedev->mixdev_node, &mousedev_mix_list); | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
389 | static void mixdev_remove_device(struct mousedev *mousedev) | |
390 | { | |
391 | if (mousedev->mixdev_open) { | |
392 | mousedev->mixdev_open = 0; | |
393 | if (!--mousedev->open && mousedev->exist) | |
394 | input_close_device(&mousedev->handle); | |
395 | } | |
396 | ||
397 | list_del_init(&mousedev->mixdev_node); | |
398 | } | |
399 | ||
400 | static void mixdev_open_devices(void) | |
401 | { | |
402 | struct mousedev *mousedev; | |
403 | ||
404 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { | |
405 | if (mousedev->exist && !mousedev->open) { | |
406 | if (input_open_device(&mousedev->handle)) | |
407 | continue; | |
408 | ||
409 | mousedev->open++; | |
410 | mousedev->mixdev_open++; | |
1da177e4 LT |
411 | } |
412 | } | |
1da177e4 LT |
413 | } |
414 | ||
d542ed82 | 415 | static void mixdev_close_devices(void) |
1da177e4 | 416 | { |
d542ed82 DT |
417 | struct mousedev *mousedev, *next; |
418 | ||
419 | list_for_each_entry_safe(mousedev, next, &mousedev_mix_list, mixdev_node) { | |
420 | if (mousedev->mixdev_open) { | |
421 | mousedev->mixdev_open = 0; | |
422 | if (!--mousedev->open) { | |
423 | if (mousedev->exist) | |
424 | input_close_device(&mousedev->handle); | |
425 | else | |
426 | mousedev_free(mousedev); | |
427 | } | |
1da177e4 LT |
428 | } |
429 | } | |
1da177e4 LT |
430 | } |
431 | ||
d0ffb9be | 432 | static int mousedev_release(struct inode *inode, struct file *file) |
1da177e4 | 433 | { |
d0ffb9be DT |
434 | struct mousedev_client *client = file->private_data; |
435 | struct mousedev *mousedev = client->mousedev; | |
1da177e4 LT |
436 | |
437 | mousedev_fasync(-1, file, 0); | |
438 | ||
d0ffb9be DT |
439 | list_del(&client->node); |
440 | kfree(client); | |
1da177e4 | 441 | |
d0ffb9be DT |
442 | if (!--mousedev->open) { |
443 | if (mousedev->minor == MOUSEDEV_MIX) | |
d542ed82 DT |
444 | mixdev_close_devices(); |
445 | else if (mousedev->exist) | |
446 | input_close_device(&mousedev->handle); | |
447 | else | |
448 | mousedev_free(mousedev); | |
1da177e4 LT |
449 | } |
450 | ||
1da177e4 LT |
451 | return 0; |
452 | } | |
453 | ||
d542ed82 | 454 | |
d0ffb9be | 455 | static int mousedev_open(struct inode *inode, struct file *file) |
1da177e4 | 456 | { |
d0ffb9be | 457 | struct mousedev_client *client; |
1da177e4 | 458 | struct mousedev *mousedev; |
d542ed82 | 459 | int error; |
1da177e4 LT |
460 | int i; |
461 | ||
462 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
463 | if (imajor(inode) == MISC_MAJOR) | |
464 | i = MOUSEDEV_MIX; | |
465 | else | |
466 | #endif | |
467 | i = iminor(inode) - MOUSEDEV_MINOR_BASE; | |
468 | ||
d0ffb9be | 469 | if (i >= MOUSEDEV_MINORS) |
1da177e4 LT |
470 | return -ENODEV; |
471 | ||
d0ffb9be DT |
472 | mousedev = mousedev_table[i]; |
473 | if (!mousedev) | |
1da177e4 LT |
474 | return -ENODEV; |
475 | ||
d0ffb9be DT |
476 | client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL); |
477 | if (!client) | |
1da177e4 | 478 | return -ENOMEM; |
1da177e4 | 479 | |
d0ffb9be DT |
480 | spin_lock_init(&client->packet_lock); |
481 | client->pos_x = xres / 2; | |
482 | client->pos_y = yres / 2; | |
483 | client->mousedev = mousedev; | |
484 | list_add_tail(&client->node, &mousedev->client_list); | |
1da177e4 | 485 | |
d0ffb9be | 486 | if (!mousedev->open++) { |
d542ed82 DT |
487 | if (mousedev->minor == MOUSEDEV_MIX) |
488 | mixdev_open_devices(); | |
489 | else if (mousedev->exist) { | |
490 | error = input_open_device(&mousedev->handle); | |
491 | if (error) { | |
492 | list_del(&client->node); | |
493 | kfree(client); | |
494 | return error; | |
1da177e4 | 495 | } |
d542ed82 | 496 | } |
1da177e4 LT |
497 | } |
498 | ||
d0ffb9be | 499 | file->private_data = client; |
1da177e4 LT |
500 | return 0; |
501 | } | |
502 | ||
503 | static inline int mousedev_limit_delta(int delta, int limit) | |
504 | { | |
505 | return delta > limit ? limit : (delta < -limit ? -limit : delta); | |
506 | } | |
507 | ||
d0ffb9be | 508 | static void mousedev_packet(struct mousedev_client *client, signed char *ps2_data) |
1da177e4 LT |
509 | { |
510 | struct mousedev_motion *p; | |
511 | unsigned long flags; | |
512 | ||
d0ffb9be DT |
513 | spin_lock_irqsave(&client->packet_lock, flags); |
514 | p = &client->packets[client->tail]; | |
1da177e4 LT |
515 | |
516 | ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07); | |
517 | ps2_data[1] = mousedev_limit_delta(p->dx, 127); | |
518 | ps2_data[2] = mousedev_limit_delta(p->dy, 127); | |
519 | p->dx -= ps2_data[1]; | |
520 | p->dy -= ps2_data[2]; | |
521 | ||
d0ffb9be | 522 | switch (client->mode) { |
1da177e4 LT |
523 | case MOUSEDEV_EMUL_EXPS: |
524 | ps2_data[3] = mousedev_limit_delta(p->dz, 7); | |
525 | p->dz -= ps2_data[3]; | |
526 | ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1); | |
d0ffb9be | 527 | client->bufsiz = 4; |
1da177e4 LT |
528 | break; |
529 | ||
530 | case MOUSEDEV_EMUL_IMPS: | |
531 | ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); | |
532 | ps2_data[3] = mousedev_limit_delta(p->dz, 127); | |
533 | p->dz -= ps2_data[3]; | |
d0ffb9be | 534 | client->bufsiz = 4; |
1da177e4 LT |
535 | break; |
536 | ||
537 | case MOUSEDEV_EMUL_PS2: | |
538 | default: | |
539 | ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); | |
540 | p->dz = 0; | |
d0ffb9be | 541 | client->bufsiz = 3; |
1da177e4 LT |
542 | break; |
543 | } | |
544 | ||
545 | if (!p->dx && !p->dy && !p->dz) { | |
d0ffb9be DT |
546 | if (client->tail == client->head) { |
547 | client->ready = 0; | |
548 | client->last_buttons = p->buttons; | |
c1e4c8d3 | 549 | } else |
d0ffb9be | 550 | client->tail = (client->tail + 1) % PACKET_QUEUE_LEN; |
1da177e4 LT |
551 | } |
552 | ||
d0ffb9be | 553 | spin_unlock_irqrestore(&client->packet_lock, flags); |
1da177e4 LT |
554 | } |
555 | ||
556 | ||
d0ffb9be | 557 | static ssize_t mousedev_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) |
1da177e4 | 558 | { |
d0ffb9be | 559 | struct mousedev_client *client = file->private_data; |
1da177e4 LT |
560 | unsigned char c; |
561 | unsigned int i; | |
562 | ||
563 | for (i = 0; i < count; i++) { | |
564 | ||
565 | if (get_user(c, buffer + i)) | |
566 | return -EFAULT; | |
567 | ||
d0ffb9be DT |
568 | if (c == mousedev_imex_seq[client->imexseq]) { |
569 | if (++client->imexseq == MOUSEDEV_SEQ_LEN) { | |
570 | client->imexseq = 0; | |
571 | client->mode = MOUSEDEV_EMUL_EXPS; | |
1da177e4 | 572 | } |
1e0afb28 | 573 | } else |
d0ffb9be | 574 | client->imexseq = 0; |
1da177e4 | 575 | |
d0ffb9be DT |
576 | if (c == mousedev_imps_seq[client->impsseq]) { |
577 | if (++client->impsseq == MOUSEDEV_SEQ_LEN) { | |
578 | client->impsseq = 0; | |
579 | client->mode = MOUSEDEV_EMUL_IMPS; | |
1da177e4 | 580 | } |
1e0afb28 | 581 | } else |
d0ffb9be | 582 | client->impsseq = 0; |
1da177e4 | 583 | |
d0ffb9be | 584 | client->ps2[0] = 0xfa; |
1da177e4 LT |
585 | |
586 | switch (c) { | |
587 | ||
588 | case 0xeb: /* Poll */ | |
d0ffb9be DT |
589 | mousedev_packet(client, &client->ps2[1]); |
590 | client->bufsiz++; /* account for leading ACK */ | |
1da177e4 LT |
591 | break; |
592 | ||
593 | case 0xf2: /* Get ID */ | |
d0ffb9be DT |
594 | switch (client->mode) { |
595 | case MOUSEDEV_EMUL_PS2: client->ps2[1] = 0; break; | |
596 | case MOUSEDEV_EMUL_IMPS: client->ps2[1] = 3; break; | |
597 | case MOUSEDEV_EMUL_EXPS: client->ps2[1] = 4; break; | |
1da177e4 | 598 | } |
d0ffb9be | 599 | client->bufsiz = 2; |
1da177e4 LT |
600 | break; |
601 | ||
602 | case 0xe9: /* Get info */ | |
d0ffb9be DT |
603 | client->ps2[1] = 0x60; client->ps2[2] = 3; client->ps2[3] = 200; |
604 | client->bufsiz = 4; | |
1da177e4 LT |
605 | break; |
606 | ||
607 | case 0xff: /* Reset */ | |
d0ffb9be DT |
608 | client->impsseq = client->imexseq = 0; |
609 | client->mode = MOUSEDEV_EMUL_PS2; | |
610 | client->ps2[1] = 0xaa; client->ps2[2] = 0x00; | |
611 | client->bufsiz = 3; | |
1da177e4 LT |
612 | break; |
613 | ||
614 | default: | |
d0ffb9be | 615 | client->bufsiz = 1; |
1da177e4 LT |
616 | break; |
617 | } | |
618 | ||
d0ffb9be | 619 | client->buffer = client->bufsiz; |
1da177e4 LT |
620 | } |
621 | ||
d0ffb9be | 622 | kill_fasync(&client->fasync, SIGIO, POLL_IN); |
1da177e4 | 623 | |
d0ffb9be | 624 | wake_up_interruptible(&client->mousedev->wait); |
1da177e4 LT |
625 | |
626 | return count; | |
627 | } | |
628 | ||
d0ffb9be | 629 | static ssize_t mousedev_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) |
1da177e4 | 630 | { |
d0ffb9be | 631 | struct mousedev_client *client = file->private_data; |
1da177e4 LT |
632 | int retval = 0; |
633 | ||
d0ffb9be | 634 | if (!client->ready && !client->buffer && (file->f_flags & O_NONBLOCK)) |
1da177e4 LT |
635 | return -EAGAIN; |
636 | ||
d0ffb9be DT |
637 | retval = wait_event_interruptible(client->mousedev->wait, |
638 | !client->mousedev->exist || client->ready || client->buffer); | |
1da177e4 LT |
639 | |
640 | if (retval) | |
641 | return retval; | |
642 | ||
d0ffb9be | 643 | if (!client->mousedev->exist) |
1da177e4 LT |
644 | return -ENODEV; |
645 | ||
d0ffb9be DT |
646 | if (!client->buffer && client->ready) { |
647 | mousedev_packet(client, client->ps2); | |
648 | client->buffer = client->bufsiz; | |
1da177e4 LT |
649 | } |
650 | ||
d0ffb9be DT |
651 | if (count > client->buffer) |
652 | count = client->buffer; | |
1da177e4 | 653 | |
d0ffb9be | 654 | client->buffer -= count; |
1da177e4 | 655 | |
d0ffb9be | 656 | if (copy_to_user(buffer, client->ps2 + client->bufsiz - client->buffer - count, count)) |
1da177e4 LT |
657 | return -EFAULT; |
658 | ||
659 | return count; | |
660 | } | |
661 | ||
662 | /* No kernel lock - fine */ | |
663 | static unsigned int mousedev_poll(struct file *file, poll_table *wait) | |
664 | { | |
d0ffb9be DT |
665 | struct mousedev_client *client = file->private_data; |
666 | struct mousedev *mousedev = client->mousedev; | |
1e0afb28 | 667 | |
d0ffb9be DT |
668 | poll_wait(file, &mousedev->wait, wait); |
669 | return ((client->ready || client->buffer) ? (POLLIN | POLLRDNORM) : 0) | | |
670 | (mousedev->exist ? 0 : (POLLHUP | POLLERR)); | |
1da177e4 LT |
671 | } |
672 | ||
66e66118 | 673 | static const struct file_operations mousedev_fops = { |
1da177e4 LT |
674 | .owner = THIS_MODULE, |
675 | .read = mousedev_read, | |
676 | .write = mousedev_write, | |
677 | .poll = mousedev_poll, | |
678 | .open = mousedev_open, | |
679 | .release = mousedev_release, | |
680 | .fasync = mousedev_fasync, | |
681 | }; | |
682 | ||
5b2a0826 DT |
683 | static int mousedev_connect(struct input_handler *handler, struct input_dev *dev, |
684 | const struct input_device_id *id) | |
1da177e4 LT |
685 | { |
686 | struct mousedev *mousedev; | |
c9bcd582 | 687 | struct class_device *cdev; |
5b2a0826 DT |
688 | dev_t devt; |
689 | int minor; | |
690 | int error; | |
1da177e4 LT |
691 | |
692 | for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++); | |
693 | if (minor == MOUSEDEV_MINORS) { | |
694 | printk(KERN_ERR "mousedev: no more free mousedev devices\n"); | |
5b2a0826 | 695 | return -ENFILE; |
1da177e4 LT |
696 | } |
697 | ||
5b2a0826 DT |
698 | mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL); |
699 | if (!mousedev) | |
700 | return -ENOMEM; | |
1da177e4 | 701 | |
d0ffb9be | 702 | INIT_LIST_HEAD(&mousedev->client_list); |
5b2a0826 | 703 | INIT_LIST_HEAD(&mousedev->mixdev_node); |
1da177e4 LT |
704 | init_waitqueue_head(&mousedev->wait); |
705 | ||
706 | mousedev->minor = minor; | |
707 | mousedev->exist = 1; | |
708 | mousedev->handle.dev = dev; | |
709 | mousedev->handle.name = mousedev->name; | |
710 | mousedev->handle.handler = handler; | |
711 | mousedev->handle.private = mousedev; | |
712 | sprintf(mousedev->name, "mouse%d", minor); | |
713 | ||
1da177e4 LT |
714 | mousedev_table[minor] = mousedev; |
715 | ||
5b2a0826 DT |
716 | devt = MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor), |
717 | ||
718 | cdev = class_device_create(&input_class, &dev->cdev, devt, | |
719 | dev->cdev.dev, mousedev->name); | |
720 | if (IS_ERR(cdev)) { | |
721 | error = PTR_ERR(cdev); | |
722 | goto err_free_mousedev; | |
723 | } | |
c9bcd582 GKH |
724 | |
725 | /* temporary symlink to keep userspace happy */ | |
a3d52136 | 726 | error = sysfs_create_link(&input_class.subsys.kobj, |
5b2a0826 DT |
727 | &cdev->kobj, mousedev->name); |
728 | if (error) | |
729 | goto err_cdev_destroy; | |
730 | ||
731 | error = input_register_handle(&mousedev->handle); | |
732 | if (error) | |
733 | goto err_remove_link; | |
734 | ||
d542ed82 DT |
735 | error = mixdev_add_device(mousedev); |
736 | if (error) | |
737 | goto err_unregister_handle; | |
1da177e4 | 738 | |
5b2a0826 DT |
739 | return 0; |
740 | ||
741 | err_unregister_handle: | |
742 | input_unregister_handle(&mousedev->handle); | |
743 | err_remove_link: | |
a3d52136 | 744 | sysfs_remove_link(&input_class.subsys.kobj, mousedev->name); |
5b2a0826 DT |
745 | err_cdev_destroy: |
746 | class_device_destroy(&input_class, devt); | |
747 | err_free_mousedev: | |
748 | mousedev_table[minor] = NULL; | |
749 | kfree(mousedev); | |
750 | return error; | |
1da177e4 LT |
751 | } |
752 | ||
753 | static void mousedev_disconnect(struct input_handle *handle) | |
754 | { | |
755 | struct mousedev *mousedev = handle->private; | |
d0ffb9be | 756 | struct mousedev_client *client; |
1da177e4 | 757 | |
5b2a0826 | 758 | input_unregister_handle(handle); |
1da177e4 | 759 | |
823bccfc | 760 | sysfs_remove_link(&input_class.subsys.kobj, mousedev->name); |
ea9f240b | 761 | class_device_destroy(&input_class, |
1235686f | 762 | MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + mousedev->minor)); |
1da177e4 LT |
763 | mousedev->exist = 0; |
764 | ||
d542ed82 DT |
765 | mixdev_remove_device(mousedev); |
766 | ||
1da177e4 LT |
767 | if (mousedev->open) { |
768 | input_close_device(handle); | |
d0ffb9be DT |
769 | list_for_each_entry(client, &mousedev->client_list, node) |
770 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
1dfa2812 | 771 | wake_up_interruptible(&mousedev->wait); |
d542ed82 | 772 | } else |
1da177e4 | 773 | mousedev_free(mousedev); |
1da177e4 LT |
774 | } |
775 | ||
66e66118 | 776 | static const struct input_device_id mousedev_ids[] = { |
1da177e4 LT |
777 | { |
778 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT, | |
779 | .evbit = { BIT(EV_KEY) | BIT(EV_REL) }, | |
780 | .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) }, | |
781 | .relbit = { BIT(REL_X) | BIT(REL_Y) }, | |
782 | }, /* A mouse like device, at least one button, two relative axes */ | |
783 | { | |
784 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_RELBIT, | |
785 | .evbit = { BIT(EV_KEY) | BIT(EV_REL) }, | |
786 | .relbit = { BIT(REL_WHEEL) }, | |
787 | }, /* A separate scrollwheel */ | |
788 | { | |
789 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
790 | .evbit = { BIT(EV_KEY) | BIT(EV_ABS) }, | |
791 | .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) }, | |
792 | .absbit = { BIT(ABS_X) | BIT(ABS_Y) }, | |
793 | }, /* A tablet like device, at least touch detection, two absolute axes */ | |
794 | { | |
795 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
796 | .evbit = { BIT(EV_KEY) | BIT(EV_ABS) }, | |
797 | .keybit = { [LONG(BTN_TOOL_FINGER)] = BIT(BTN_TOOL_FINGER) }, | |
798 | .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_TOOL_WIDTH) }, | |
799 | }, /* A touchpad */ | |
800 | ||
d0ffb9be | 801 | { }, /* Terminating entry */ |
1da177e4 LT |
802 | }; |
803 | ||
804 | MODULE_DEVICE_TABLE(input, mousedev_ids); | |
805 | ||
806 | static struct input_handler mousedev_handler = { | |
807 | .event = mousedev_event, | |
808 | .connect = mousedev_connect, | |
809 | .disconnect = mousedev_disconnect, | |
810 | .fops = &mousedev_fops, | |
811 | .minor = MOUSEDEV_MINOR_BASE, | |
812 | .name = "mousedev", | |
813 | .id_table = mousedev_ids, | |
814 | }; | |
815 | ||
816 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
817 | static struct miscdevice psaux_mouse = { | |
818 | PSMOUSE_MINOR, "psaux", &mousedev_fops | |
819 | }; | |
820 | static int psaux_registered; | |
821 | #endif | |
822 | ||
823 | static int __init mousedev_init(void) | |
824 | { | |
4263cf0f DT |
825 | struct class_device *cdev; |
826 | int error; | |
827 | ||
828 | error = input_register_handler(&mousedev_handler); | |
829 | if (error) | |
830 | return error; | |
1da177e4 LT |
831 | |
832 | memset(&mousedev_mix, 0, sizeof(struct mousedev)); | |
d0ffb9be | 833 | INIT_LIST_HEAD(&mousedev_mix.client_list); |
1da177e4 LT |
834 | init_waitqueue_head(&mousedev_mix.wait); |
835 | mousedev_table[MOUSEDEV_MIX] = &mousedev_mix; | |
836 | mousedev_mix.exist = 1; | |
837 | mousedev_mix.minor = MOUSEDEV_MIX; | |
838 | ||
4263cf0f | 839 | cdev = class_device_create(&input_class, NULL, |
1235686f | 840 | MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX), NULL, "mice"); |
4263cf0f DT |
841 | if (IS_ERR(cdev)) { |
842 | input_unregister_handler(&mousedev_handler); | |
843 | return PTR_ERR(cdev); | |
844 | } | |
1da177e4 LT |
845 | |
846 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
4263cf0f DT |
847 | error = misc_register(&psaux_mouse); |
848 | if (error) | |
849 | printk(KERN_WARNING "mice: could not register psaux device, " | |
850 | "error: %d\n", error); | |
851 | else | |
852 | psaux_registered = 1; | |
1da177e4 LT |
853 | #endif |
854 | ||
855 | printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n"); | |
856 | ||
857 | return 0; | |
858 | } | |
859 | ||
860 | static void __exit mousedev_exit(void) | |
861 | { | |
862 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
863 | if (psaux_registered) | |
864 | misc_deregister(&psaux_mouse); | |
865 | #endif | |
ea9f240b | 866 | class_device_destroy(&input_class, |
1235686f | 867 | MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + MOUSEDEV_MIX)); |
1da177e4 LT |
868 | input_unregister_handler(&mousedev_handler); |
869 | } | |
870 | ||
871 | module_init(mousedev_init); | |
872 | module_exit(mousedev_exit); |