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 | ||
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 | 66 | struct input_handle handle; |
9657d75c | 67 | struct device dev; |
1da177e4 | 68 | |
d542ed82 DT |
69 | struct list_head mixdev_node; |
70 | int mixdev_open; | |
71 | ||
1da177e4 LT |
72 | struct mousedev_hw_data packet; |
73 | unsigned int pkt_count; | |
74 | int old_x[4], old_y[4]; | |
75 | int frac_dx, frac_dy; | |
76 | unsigned long touch; | |
77 | }; | |
78 | ||
79 | enum mousedev_emul { | |
80 | MOUSEDEV_EMUL_PS2, | |
81 | MOUSEDEV_EMUL_IMPS, | |
82 | MOUSEDEV_EMUL_EXPS | |
83 | }; | |
84 | ||
85 | struct mousedev_motion { | |
86 | int dx, dy, dz; | |
87 | unsigned long buttons; | |
88 | }; | |
89 | ||
90 | #define PACKET_QUEUE_LEN 16 | |
d0ffb9be | 91 | struct mousedev_client { |
1da177e4 LT |
92 | struct fasync_struct *fasync; |
93 | struct mousedev *mousedev; | |
94 | struct list_head node; | |
95 | ||
96 | struct mousedev_motion packets[PACKET_QUEUE_LEN]; | |
97 | unsigned int head, tail; | |
98 | spinlock_t packet_lock; | |
99 | int pos_x, pos_y; | |
100 | ||
101 | signed char ps2[6]; | |
102 | unsigned char ready, buffer, bufsiz; | |
103 | unsigned char imexseq, impsseq; | |
104 | enum mousedev_emul mode; | |
c1e4c8d3 | 105 | unsigned long last_buttons; |
1da177e4 LT |
106 | }; |
107 | ||
108 | #define MOUSEDEV_SEQ_LEN 6 | |
109 | ||
110 | static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 }; | |
111 | static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 }; | |
112 | ||
113 | static struct input_handler mousedev_handler; | |
114 | ||
115 | static struct mousedev *mousedev_table[MOUSEDEV_MINORS]; | |
9657d75c | 116 | static struct mousedev *mousedev_mix; |
d542ed82 | 117 | static LIST_HEAD(mousedev_mix_list); |
1da177e4 LT |
118 | |
119 | #define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03]) | |
120 | #define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03]) | |
121 | ||
122 | static void mousedev_touchpad_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value) | |
123 | { | |
124 | int size, tmp; | |
125 | enum { FRACTION_DENOM = 128 }; | |
126 | ||
0d9d93c4 DT |
127 | switch (code) { |
128 | case ABS_X: | |
129 | fx(0) = value; | |
130 | if (mousedev->touch && mousedev->pkt_count >= 2) { | |
131 | size = dev->absmax[ABS_X] - dev->absmin[ABS_X]; | |
132 | if (size == 0) | |
133 | size = 256 * 2; | |
134 | tmp = ((value - fx(2)) * (256 * FRACTION_DENOM)) / size; | |
135 | tmp += mousedev->frac_dx; | |
136 | mousedev->packet.dx = tmp / FRACTION_DENOM; | |
137 | mousedev->frac_dx = tmp - mousedev->packet.dx * FRACTION_DENOM; | |
138 | } | |
139 | break; | |
1da177e4 | 140 | |
0d9d93c4 DT |
141 | case ABS_Y: |
142 | fy(0) = value; | |
143 | if (mousedev->touch && mousedev->pkt_count >= 2) { | |
144 | /* use X size to keep the same scale */ | |
145 | size = dev->absmax[ABS_X] - dev->absmin[ABS_X]; | |
146 | if (size == 0) | |
147 | size = 256 * 2; | |
148 | tmp = -((value - fy(2)) * (256 * FRACTION_DENOM)) / size; | |
149 | tmp += mousedev->frac_dy; | |
150 | mousedev->packet.dy = tmp / FRACTION_DENOM; | |
151 | mousedev->frac_dy = tmp - mousedev->packet.dy * FRACTION_DENOM; | |
152 | } | |
153 | break; | |
1da177e4 LT |
154 | } |
155 | } | |
156 | ||
157 | static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value) | |
158 | { | |
159 | int size; | |
160 | ||
161 | switch (code) { | |
162 | case ABS_X: | |
163 | size = dev->absmax[ABS_X] - dev->absmin[ABS_X]; | |
1e0afb28 DT |
164 | if (size == 0) |
165 | size = xres ? : 1; | |
166 | if (value > dev->absmax[ABS_X]) | |
167 | value = dev->absmax[ABS_X]; | |
168 | if (value < dev->absmin[ABS_X]) | |
169 | value = dev->absmin[ABS_X]; | |
1da177e4 LT |
170 | mousedev->packet.x = ((value - dev->absmin[ABS_X]) * xres) / size; |
171 | mousedev->packet.abs_event = 1; | |
172 | break; | |
173 | ||
174 | case ABS_Y: | |
175 | size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y]; | |
1e0afb28 DT |
176 | if (size == 0) |
177 | size = yres ? : 1; | |
178 | if (value > dev->absmax[ABS_Y]) | |
179 | value = dev->absmax[ABS_Y]; | |
180 | if (value < dev->absmin[ABS_Y]) | |
181 | value = dev->absmin[ABS_Y]; | |
1da177e4 LT |
182 | mousedev->packet.y = yres - ((value - dev->absmin[ABS_Y]) * yres) / size; |
183 | mousedev->packet.abs_event = 1; | |
184 | break; | |
185 | } | |
186 | } | |
187 | ||
188 | static void mousedev_rel_event(struct mousedev *mousedev, unsigned int code, int value) | |
189 | { | |
190 | switch (code) { | |
191 | case REL_X: mousedev->packet.dx += value; break; | |
192 | case REL_Y: mousedev->packet.dy -= value; break; | |
193 | case REL_WHEEL: mousedev->packet.dz -= value; break; | |
194 | } | |
195 | } | |
196 | ||
197 | static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int value) | |
198 | { | |
199 | int index; | |
200 | ||
201 | switch (code) { | |
202 | case BTN_TOUCH: | |
203 | case BTN_0: | |
1da177e4 LT |
204 | case BTN_LEFT: index = 0; break; |
205 | case BTN_STYLUS: | |
206 | case BTN_1: | |
207 | case BTN_RIGHT: index = 1; break; | |
208 | case BTN_2: | |
6c595fb1 | 209 | case BTN_FORWARD: |
1da177e4 LT |
210 | case BTN_STYLUS2: |
211 | case BTN_MIDDLE: index = 2; break; | |
212 | case BTN_3: | |
213 | case BTN_BACK: | |
214 | case BTN_SIDE: index = 3; break; | |
215 | case BTN_4: | |
216 | case BTN_EXTRA: index = 4; break; | |
1e0afb28 | 217 | default: return; |
1da177e4 LT |
218 | } |
219 | ||
220 | if (value) { | |
221 | set_bit(index, &mousedev->packet.buttons); | |
9657d75c | 222 | set_bit(index, &mousedev_mix->packet.buttons); |
1da177e4 LT |
223 | } else { |
224 | clear_bit(index, &mousedev->packet.buttons); | |
9657d75c | 225 | clear_bit(index, &mousedev_mix->packet.buttons); |
1da177e4 LT |
226 | } |
227 | } | |
228 | ||
229 | static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet) | |
230 | { | |
d0ffb9be | 231 | struct mousedev_client *client; |
1da177e4 LT |
232 | struct mousedev_motion *p; |
233 | unsigned long flags; | |
8121152c | 234 | int wake_readers = 0; |
1da177e4 | 235 | |
d0ffb9be DT |
236 | list_for_each_entry(client, &mousedev->client_list, node) { |
237 | spin_lock_irqsave(&client->packet_lock, flags); | |
1da177e4 | 238 | |
d0ffb9be DT |
239 | p = &client->packets[client->head]; |
240 | if (client->ready && p->buttons != mousedev->packet.buttons) { | |
241 | unsigned int new_head = (client->head + 1) % PACKET_QUEUE_LEN; | |
242 | if (new_head != client->tail) { | |
243 | p = &client->packets[client->head = new_head]; | |
1da177e4 LT |
244 | memset(p, 0, sizeof(struct mousedev_motion)); |
245 | } | |
246 | } | |
247 | ||
248 | if (packet->abs_event) { | |
d0ffb9be DT |
249 | p->dx += packet->x - client->pos_x; |
250 | p->dy += packet->y - client->pos_y; | |
251 | client->pos_x = packet->x; | |
252 | client->pos_y = packet->y; | |
1da177e4 LT |
253 | } |
254 | ||
d0ffb9be DT |
255 | client->pos_x += packet->dx; |
256 | client->pos_x = client->pos_x < 0 ? 0 : (client->pos_x >= xres ? xres : client->pos_x); | |
257 | client->pos_y += packet->dy; | |
258 | client->pos_y = client->pos_y < 0 ? 0 : (client->pos_y >= yres ? yres : client->pos_y); | |
1da177e4 LT |
259 | |
260 | p->dx += packet->dx; | |
261 | p->dy += packet->dy; | |
262 | p->dz += packet->dz; | |
263 | p->buttons = mousedev->packet.buttons; | |
264 | ||
d0ffb9be DT |
265 | if (p->dx || p->dy || p->dz || p->buttons != client->last_buttons) |
266 | client->ready = 1; | |
1da177e4 | 267 | |
d0ffb9be | 268 | spin_unlock_irqrestore(&client->packet_lock, flags); |
c1e4c8d3 | 269 | |
d0ffb9be DT |
270 | if (client->ready) { |
271 | kill_fasync(&client->fasync, SIGIO, POLL_IN); | |
8121152c DT |
272 | wake_readers = 1; |
273 | } | |
1da177e4 LT |
274 | } |
275 | ||
8121152c DT |
276 | if (wake_readers) |
277 | wake_up_interruptible(&mousedev->wait); | |
1da177e4 LT |
278 | } |
279 | ||
280 | static void mousedev_touchpad_touch(struct mousedev *mousedev, int value) | |
281 | { | |
282 | if (!value) { | |
283 | if (mousedev->touch && | |
284 | time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) { | |
285 | /* | |
286 | * Toggle left button to emulate tap. | |
287 | * We rely on the fact that mousedev_mix always has 0 | |
288 | * motion packet so we won't mess current position. | |
289 | */ | |
290 | set_bit(0, &mousedev->packet.buttons); | |
9657d75c DT |
291 | set_bit(0, &mousedev_mix->packet.buttons); |
292 | mousedev_notify_readers(mousedev, &mousedev_mix->packet); | |
293 | mousedev_notify_readers(mousedev_mix, &mousedev_mix->packet); | |
1da177e4 | 294 | clear_bit(0, &mousedev->packet.buttons); |
9657d75c | 295 | clear_bit(0, &mousedev_mix->packet.buttons); |
1da177e4 LT |
296 | } |
297 | mousedev->touch = mousedev->pkt_count = 0; | |
298 | mousedev->frac_dx = 0; | |
299 | mousedev->frac_dy = 0; | |
1e0afb28 DT |
300 | |
301 | } else if (!mousedev->touch) | |
302 | mousedev->touch = jiffies; | |
1da177e4 LT |
303 | } |
304 | ||
305 | static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) | |
306 | { | |
307 | struct mousedev *mousedev = handle->private; | |
308 | ||
309 | switch (type) { | |
310 | case EV_ABS: | |
311 | /* Ignore joysticks */ | |
312 | if (test_bit(BTN_TRIGGER, handle->dev->keybit)) | |
313 | return; | |
314 | ||
315 | if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) | |
316 | mousedev_touchpad_event(handle->dev, mousedev, code, value); | |
317 | else | |
318 | mousedev_abs_event(handle->dev, mousedev, code, value); | |
319 | ||
320 | break; | |
321 | ||
322 | case EV_REL: | |
323 | mousedev_rel_event(mousedev, code, value); | |
324 | break; | |
325 | ||
326 | case EV_KEY: | |
327 | if (value != 2) { | |
328 | if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) | |
329 | mousedev_touchpad_touch(mousedev, value); | |
330 | else | |
331 | mousedev_key_event(mousedev, code, value); | |
332 | } | |
333 | break; | |
334 | ||
335 | case EV_SYN: | |
336 | if (code == SYN_REPORT) { | |
337 | if (mousedev->touch) { | |
338 | mousedev->pkt_count++; | |
339 | /* Input system eats duplicate events, but we need all of them | |
340 | * to do correct averaging so apply present one forward | |
1e0afb28 | 341 | */ |
1da177e4 LT |
342 | fx(0) = fx(1); |
343 | fy(0) = fy(1); | |
344 | } | |
345 | ||
346 | mousedev_notify_readers(mousedev, &mousedev->packet); | |
9657d75c | 347 | mousedev_notify_readers(mousedev_mix, &mousedev->packet); |
1da177e4 LT |
348 | |
349 | mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0; | |
350 | mousedev->packet.abs_event = 0; | |
351 | } | |
352 | break; | |
353 | } | |
354 | } | |
355 | ||
356 | static int mousedev_fasync(int fd, struct file *file, int on) | |
357 | { | |
358 | int retval; | |
d0ffb9be | 359 | struct mousedev_client *client = file->private_data; |
1e0afb28 | 360 | |
d0ffb9be | 361 | retval = fasync_helper(fd, file, on, &client->fasync); |
1e0afb28 | 362 | |
1da177e4 LT |
363 | return retval < 0 ? retval : 0; |
364 | } | |
365 | ||
9657d75c | 366 | static void mousedev_free(struct device *dev) |
1da177e4 | 367 | { |
9657d75c DT |
368 | struct mousedev *mousedev = container_of(dev, struct mousedev, dev); |
369 | ||
1da177e4 LT |
370 | mousedev_table[mousedev->minor] = NULL; |
371 | kfree(mousedev); | |
372 | } | |
373 | ||
d542ed82 | 374 | static int mixdev_add_device(struct mousedev *mousedev) |
1da177e4 | 375 | { |
d542ed82 | 376 | int error; |
1da177e4 | 377 | |
9657d75c | 378 | if (mousedev_mix->open) { |
d542ed82 DT |
379 | error = input_open_device(&mousedev->handle); |
380 | if (error) | |
381 | return error; | |
1da177e4 | 382 | |
d542ed82 | 383 | mousedev->open++; |
9657d75c | 384 | mousedev->mixdev_open = 1; |
d542ed82 DT |
385 | } |
386 | ||
9657d75c | 387 | get_device(&mousedev->dev); |
d542ed82 DT |
388 | list_add_tail(&mousedev->mixdev_node, &mousedev_mix_list); |
389 | ||
390 | return 0; | |
391 | } | |
392 | ||
393 | static void mixdev_remove_device(struct mousedev *mousedev) | |
394 | { | |
395 | if (mousedev->mixdev_open) { | |
396 | mousedev->mixdev_open = 0; | |
397 | if (!--mousedev->open && mousedev->exist) | |
398 | input_close_device(&mousedev->handle); | |
399 | } | |
400 | ||
401 | list_del_init(&mousedev->mixdev_node); | |
9657d75c | 402 | put_device(&mousedev->dev); |
d542ed82 DT |
403 | } |
404 | ||
405 | static void mixdev_open_devices(void) | |
406 | { | |
407 | struct mousedev *mousedev; | |
408 | ||
9657d75c DT |
409 | if (mousedev_mix->open++) |
410 | return; | |
411 | ||
d542ed82 | 412 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { |
9657d75c DT |
413 | if (!mousedev->mixdev_open) { |
414 | if (!mousedev->open && mousedev->exist) | |
415 | if (input_open_device(&mousedev->handle)) | |
416 | continue; | |
d542ed82 DT |
417 | |
418 | mousedev->open++; | |
9657d75c | 419 | mousedev->mixdev_open = 1; |
1da177e4 LT |
420 | } |
421 | } | |
1da177e4 LT |
422 | } |
423 | ||
d542ed82 | 424 | static void mixdev_close_devices(void) |
1da177e4 | 425 | { |
9657d75c | 426 | struct mousedev *mousedev; |
d542ed82 | 427 | |
9657d75c DT |
428 | if (--mousedev_mix->open) |
429 | return; | |
430 | ||
431 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { | |
d542ed82 DT |
432 | if (mousedev->mixdev_open) { |
433 | mousedev->mixdev_open = 0; | |
9657d75c DT |
434 | if (!--mousedev->open && mousedev->exist) |
435 | input_close_device(&mousedev->handle); | |
1da177e4 LT |
436 | } |
437 | } | |
1da177e4 LT |
438 | } |
439 | ||
d0ffb9be | 440 | static int mousedev_release(struct inode *inode, struct file *file) |
1da177e4 | 441 | { |
d0ffb9be DT |
442 | struct mousedev_client *client = file->private_data; |
443 | struct mousedev *mousedev = client->mousedev; | |
1da177e4 LT |
444 | |
445 | mousedev_fasync(-1, file, 0); | |
446 | ||
d0ffb9be DT |
447 | list_del(&client->node); |
448 | kfree(client); | |
1da177e4 | 449 | |
9657d75c DT |
450 | if (mousedev->minor == MOUSEDEV_MIX) |
451 | mixdev_close_devices(); | |
452 | else if (!--mousedev->open && mousedev->exist) | |
453 | input_close_device(&mousedev->handle); | |
454 | ||
455 | put_device(&mousedev->dev); | |
1da177e4 | 456 | |
1da177e4 LT |
457 | return 0; |
458 | } | |
459 | ||
d542ed82 | 460 | |
d0ffb9be | 461 | static int mousedev_open(struct inode *inode, struct file *file) |
1da177e4 | 462 | { |
d0ffb9be | 463 | struct mousedev_client *client; |
1da177e4 | 464 | struct mousedev *mousedev; |
d542ed82 | 465 | int error; |
1da177e4 LT |
466 | int i; |
467 | ||
468 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
469 | if (imajor(inode) == MISC_MAJOR) | |
470 | i = MOUSEDEV_MIX; | |
471 | else | |
472 | #endif | |
473 | i = iminor(inode) - MOUSEDEV_MINOR_BASE; | |
474 | ||
d0ffb9be | 475 | if (i >= MOUSEDEV_MINORS) |
1da177e4 LT |
476 | return -ENODEV; |
477 | ||
d0ffb9be DT |
478 | mousedev = mousedev_table[i]; |
479 | if (!mousedev) | |
1da177e4 LT |
480 | return -ENODEV; |
481 | ||
9657d75c DT |
482 | get_device(&mousedev->dev); |
483 | ||
d0ffb9be | 484 | client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL); |
9657d75c DT |
485 | if (!client) { |
486 | error = -ENOMEM; | |
487 | goto err_put_mousedev; | |
488 | } | |
1da177e4 | 489 | |
d0ffb9be DT |
490 | spin_lock_init(&client->packet_lock); |
491 | client->pos_x = xres / 2; | |
492 | client->pos_y = yres / 2; | |
493 | client->mousedev = mousedev; | |
494 | list_add_tail(&client->node, &mousedev->client_list); | |
1da177e4 | 495 | |
9657d75c DT |
496 | if (mousedev->minor == MOUSEDEV_MIX) |
497 | mixdev_open_devices(); | |
498 | else if (!mousedev->open++ && mousedev->exist) { | |
499 | error = input_open_device(&mousedev->handle); | |
500 | if (error) | |
501 | goto err_free_client; | |
1da177e4 LT |
502 | } |
503 | ||
d0ffb9be | 504 | file->private_data = client; |
1da177e4 | 505 | return 0; |
9657d75c DT |
506 | |
507 | err_free_client: | |
508 | list_del(&client->node); | |
509 | kfree(client); | |
510 | err_put_mousedev: | |
511 | put_device(&mousedev->dev); | |
512 | return error; | |
1da177e4 LT |
513 | } |
514 | ||
515 | static inline int mousedev_limit_delta(int delta, int limit) | |
516 | { | |
517 | return delta > limit ? limit : (delta < -limit ? -limit : delta); | |
518 | } | |
519 | ||
d0ffb9be | 520 | static void mousedev_packet(struct mousedev_client *client, signed char *ps2_data) |
1da177e4 LT |
521 | { |
522 | struct mousedev_motion *p; | |
523 | unsigned long flags; | |
524 | ||
d0ffb9be DT |
525 | spin_lock_irqsave(&client->packet_lock, flags); |
526 | p = &client->packets[client->tail]; | |
1da177e4 LT |
527 | |
528 | ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07); | |
529 | ps2_data[1] = mousedev_limit_delta(p->dx, 127); | |
530 | ps2_data[2] = mousedev_limit_delta(p->dy, 127); | |
531 | p->dx -= ps2_data[1]; | |
532 | p->dy -= ps2_data[2]; | |
533 | ||
d0ffb9be | 534 | switch (client->mode) { |
1da177e4 LT |
535 | case MOUSEDEV_EMUL_EXPS: |
536 | ps2_data[3] = mousedev_limit_delta(p->dz, 7); | |
537 | p->dz -= ps2_data[3]; | |
538 | ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1); | |
d0ffb9be | 539 | client->bufsiz = 4; |
1da177e4 LT |
540 | break; |
541 | ||
542 | case MOUSEDEV_EMUL_IMPS: | |
543 | ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); | |
544 | ps2_data[3] = mousedev_limit_delta(p->dz, 127); | |
545 | p->dz -= ps2_data[3]; | |
d0ffb9be | 546 | client->bufsiz = 4; |
1da177e4 LT |
547 | break; |
548 | ||
549 | case MOUSEDEV_EMUL_PS2: | |
550 | default: | |
551 | ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); | |
552 | p->dz = 0; | |
d0ffb9be | 553 | client->bufsiz = 3; |
1da177e4 LT |
554 | break; |
555 | } | |
556 | ||
557 | if (!p->dx && !p->dy && !p->dz) { | |
d0ffb9be DT |
558 | if (client->tail == client->head) { |
559 | client->ready = 0; | |
560 | client->last_buttons = p->buttons; | |
c1e4c8d3 | 561 | } else |
d0ffb9be | 562 | client->tail = (client->tail + 1) % PACKET_QUEUE_LEN; |
1da177e4 LT |
563 | } |
564 | ||
d0ffb9be | 565 | spin_unlock_irqrestore(&client->packet_lock, flags); |
1da177e4 LT |
566 | } |
567 | ||
568 | ||
d0ffb9be | 569 | static ssize_t mousedev_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) |
1da177e4 | 570 | { |
d0ffb9be | 571 | struct mousedev_client *client = file->private_data; |
1da177e4 LT |
572 | unsigned char c; |
573 | unsigned int i; | |
574 | ||
575 | for (i = 0; i < count; i++) { | |
576 | ||
577 | if (get_user(c, buffer + i)) | |
578 | return -EFAULT; | |
579 | ||
d0ffb9be DT |
580 | if (c == mousedev_imex_seq[client->imexseq]) { |
581 | if (++client->imexseq == MOUSEDEV_SEQ_LEN) { | |
582 | client->imexseq = 0; | |
583 | client->mode = MOUSEDEV_EMUL_EXPS; | |
1da177e4 | 584 | } |
1e0afb28 | 585 | } else |
d0ffb9be | 586 | client->imexseq = 0; |
1da177e4 | 587 | |
d0ffb9be DT |
588 | if (c == mousedev_imps_seq[client->impsseq]) { |
589 | if (++client->impsseq == MOUSEDEV_SEQ_LEN) { | |
590 | client->impsseq = 0; | |
591 | client->mode = MOUSEDEV_EMUL_IMPS; | |
1da177e4 | 592 | } |
1e0afb28 | 593 | } else |
d0ffb9be | 594 | client->impsseq = 0; |
1da177e4 | 595 | |
d0ffb9be | 596 | client->ps2[0] = 0xfa; |
1da177e4 LT |
597 | |
598 | switch (c) { | |
599 | ||
600 | case 0xeb: /* Poll */ | |
d0ffb9be DT |
601 | mousedev_packet(client, &client->ps2[1]); |
602 | client->bufsiz++; /* account for leading ACK */ | |
1da177e4 LT |
603 | break; |
604 | ||
605 | case 0xf2: /* Get ID */ | |
d0ffb9be DT |
606 | switch (client->mode) { |
607 | case MOUSEDEV_EMUL_PS2: client->ps2[1] = 0; break; | |
608 | case MOUSEDEV_EMUL_IMPS: client->ps2[1] = 3; break; | |
609 | case MOUSEDEV_EMUL_EXPS: client->ps2[1] = 4; break; | |
1da177e4 | 610 | } |
d0ffb9be | 611 | client->bufsiz = 2; |
1da177e4 LT |
612 | break; |
613 | ||
614 | case 0xe9: /* Get info */ | |
d0ffb9be DT |
615 | client->ps2[1] = 0x60; client->ps2[2] = 3; client->ps2[3] = 200; |
616 | client->bufsiz = 4; | |
1da177e4 LT |
617 | break; |
618 | ||
619 | case 0xff: /* Reset */ | |
d0ffb9be DT |
620 | client->impsseq = client->imexseq = 0; |
621 | client->mode = MOUSEDEV_EMUL_PS2; | |
622 | client->ps2[1] = 0xaa; client->ps2[2] = 0x00; | |
623 | client->bufsiz = 3; | |
1da177e4 LT |
624 | break; |
625 | ||
626 | default: | |
d0ffb9be | 627 | client->bufsiz = 1; |
1da177e4 LT |
628 | break; |
629 | } | |
630 | ||
d0ffb9be | 631 | client->buffer = client->bufsiz; |
1da177e4 LT |
632 | } |
633 | ||
d0ffb9be | 634 | kill_fasync(&client->fasync, SIGIO, POLL_IN); |
1da177e4 | 635 | |
d0ffb9be | 636 | wake_up_interruptible(&client->mousedev->wait); |
1da177e4 LT |
637 | |
638 | return count; | |
639 | } | |
640 | ||
d0ffb9be | 641 | static ssize_t mousedev_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) |
1da177e4 | 642 | { |
d0ffb9be | 643 | struct mousedev_client *client = file->private_data; |
1da177e4 LT |
644 | int retval = 0; |
645 | ||
d0ffb9be | 646 | if (!client->ready && !client->buffer && (file->f_flags & O_NONBLOCK)) |
1da177e4 LT |
647 | return -EAGAIN; |
648 | ||
d0ffb9be DT |
649 | retval = wait_event_interruptible(client->mousedev->wait, |
650 | !client->mousedev->exist || client->ready || client->buffer); | |
1da177e4 LT |
651 | |
652 | if (retval) | |
653 | return retval; | |
654 | ||
d0ffb9be | 655 | if (!client->mousedev->exist) |
1da177e4 LT |
656 | return -ENODEV; |
657 | ||
d0ffb9be DT |
658 | if (!client->buffer && client->ready) { |
659 | mousedev_packet(client, client->ps2); | |
660 | client->buffer = client->bufsiz; | |
1da177e4 LT |
661 | } |
662 | ||
d0ffb9be DT |
663 | if (count > client->buffer) |
664 | count = client->buffer; | |
1da177e4 | 665 | |
d0ffb9be | 666 | client->buffer -= count; |
1da177e4 | 667 | |
d0ffb9be | 668 | if (copy_to_user(buffer, client->ps2 + client->bufsiz - client->buffer - count, count)) |
1da177e4 LT |
669 | return -EFAULT; |
670 | ||
671 | return count; | |
672 | } | |
673 | ||
674 | /* No kernel lock - fine */ | |
675 | static unsigned int mousedev_poll(struct file *file, poll_table *wait) | |
676 | { | |
d0ffb9be DT |
677 | struct mousedev_client *client = file->private_data; |
678 | struct mousedev *mousedev = client->mousedev; | |
1e0afb28 | 679 | |
d0ffb9be DT |
680 | poll_wait(file, &mousedev->wait, wait); |
681 | return ((client->ready || client->buffer) ? (POLLIN | POLLRDNORM) : 0) | | |
682 | (mousedev->exist ? 0 : (POLLHUP | POLLERR)); | |
1da177e4 LT |
683 | } |
684 | ||
66e66118 | 685 | static const struct file_operations mousedev_fops = { |
1da177e4 LT |
686 | .owner = THIS_MODULE, |
687 | .read = mousedev_read, | |
688 | .write = mousedev_write, | |
689 | .poll = mousedev_poll, | |
690 | .open = mousedev_open, | |
691 | .release = mousedev_release, | |
692 | .fasync = mousedev_fasync, | |
693 | }; | |
694 | ||
9657d75c DT |
695 | static struct mousedev *mousedev_create(struct input_dev *dev, |
696 | struct input_handler *handler, | |
697 | int minor) | |
1da177e4 LT |
698 | { |
699 | struct mousedev *mousedev; | |
5b2a0826 | 700 | int error; |
1da177e4 | 701 | |
5b2a0826 | 702 | mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL); |
9657d75c DT |
703 | if (!mousedev) { |
704 | error = -ENOMEM; | |
705 | goto err_out; | |
706 | } | |
1da177e4 | 707 | |
d0ffb9be | 708 | INIT_LIST_HEAD(&mousedev->client_list); |
5b2a0826 | 709 | INIT_LIST_HEAD(&mousedev->mixdev_node); |
1da177e4 LT |
710 | init_waitqueue_head(&mousedev->wait); |
711 | ||
9657d75c DT |
712 | if (minor == MOUSEDEV_MIX) |
713 | strlcpy(mousedev->name, "mice", sizeof(mousedev->name)); | |
714 | else | |
715 | snprintf(mousedev->name, sizeof(mousedev->name), | |
716 | "mouse%d", minor); | |
717 | ||
1da177e4 LT |
718 | mousedev->minor = minor; |
719 | mousedev->exist = 1; | |
720 | mousedev->handle.dev = dev; | |
721 | mousedev->handle.name = mousedev->name; | |
722 | mousedev->handle.handler = handler; | |
723 | mousedev->handle.private = mousedev; | |
1da177e4 | 724 | |
9657d75c DT |
725 | strlcpy(mousedev->dev.bus_id, mousedev->name, |
726 | sizeof(mousedev->dev.bus_id)); | |
727 | mousedev->dev.class = &input_class; | |
728 | if (dev) | |
729 | mousedev->dev.parent = &dev->dev; | |
730 | mousedev->dev.devt = MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor); | |
731 | mousedev->dev.release = mousedev_free; | |
732 | device_initialize(&mousedev->dev); | |
1da177e4 | 733 | |
9657d75c | 734 | mousedev_table[minor] = mousedev; |
5b2a0826 | 735 | |
9657d75c DT |
736 | error = device_add(&mousedev->dev); |
737 | if (error) | |
5b2a0826 | 738 | goto err_free_mousedev; |
9657d75c DT |
739 | |
740 | return mousedev; | |
741 | ||
742 | err_free_mousedev: | |
743 | put_device(&mousedev->dev); | |
744 | err_out: | |
745 | return ERR_PTR(error); | |
746 | } | |
747 | ||
748 | static void mousedev_destroy(struct mousedev *mousedev) | |
749 | { | |
750 | struct mousedev_client *client; | |
751 | ||
752 | device_del(&mousedev->dev); | |
753 | mousedev->exist = 0; | |
754 | ||
755 | if (mousedev->open) { | |
756 | input_close_device(&mousedev->handle); | |
757 | list_for_each_entry(client, &mousedev->client_list, node) | |
758 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); | |
759 | wake_up_interruptible(&mousedev->wait); | |
5b2a0826 | 760 | } |
c9bcd582 | 761 | |
9657d75c DT |
762 | put_device(&mousedev->dev); |
763 | } | |
764 | ||
765 | static int mousedev_connect(struct input_handler *handler, struct input_dev *dev, | |
766 | const struct input_device_id *id) | |
767 | { | |
768 | struct mousedev *mousedev; | |
769 | int minor; | |
770 | int error; | |
771 | ||
772 | for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++); | |
773 | if (minor == MOUSEDEV_MINORS) { | |
774 | printk(KERN_ERR "mousedev: no more free mousedev devices\n"); | |
775 | return -ENFILE; | |
776 | } | |
777 | ||
778 | mousedev = mousedev_create(dev, handler, minor); | |
779 | if (IS_ERR(mousedev)) | |
780 | return PTR_ERR(mousedev); | |
5b2a0826 DT |
781 | |
782 | error = input_register_handle(&mousedev->handle); | |
783 | if (error) | |
9657d75c | 784 | goto err_delete_mousedev; |
5b2a0826 | 785 | |
d542ed82 DT |
786 | error = mixdev_add_device(mousedev); |
787 | if (error) | |
788 | goto err_unregister_handle; | |
1da177e4 | 789 | |
5b2a0826 DT |
790 | return 0; |
791 | ||
792 | err_unregister_handle: | |
793 | input_unregister_handle(&mousedev->handle); | |
9657d75c DT |
794 | err_delete_mousedev: |
795 | device_unregister(&mousedev->dev); | |
5b2a0826 | 796 | return error; |
1da177e4 LT |
797 | } |
798 | ||
799 | static void mousedev_disconnect(struct input_handle *handle) | |
800 | { | |
801 | struct mousedev *mousedev = handle->private; | |
1da177e4 | 802 | |
d542ed82 | 803 | mixdev_remove_device(mousedev); |
9657d75c DT |
804 | input_unregister_handle(handle); |
805 | mousedev_destroy(mousedev); | |
1da177e4 LT |
806 | } |
807 | ||
66e66118 | 808 | static const struct input_device_id mousedev_ids[] = { |
1da177e4 LT |
809 | { |
810 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_RELBIT, | |
811 | .evbit = { BIT(EV_KEY) | BIT(EV_REL) }, | |
812 | .keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) }, | |
813 | .relbit = { BIT(REL_X) | BIT(REL_Y) }, | |
814 | }, /* A mouse like device, at least one button, two relative axes */ | |
815 | { | |
816 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_RELBIT, | |
817 | .evbit = { BIT(EV_KEY) | BIT(EV_REL) }, | |
818 | .relbit = { BIT(REL_WHEEL) }, | |
819 | }, /* A separate scrollwheel */ | |
820 | { | |
821 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
822 | .evbit = { BIT(EV_KEY) | BIT(EV_ABS) }, | |
823 | .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) }, | |
824 | .absbit = { BIT(ABS_X) | BIT(ABS_Y) }, | |
825 | }, /* A tablet like device, at least touch detection, two absolute axes */ | |
826 | { | |
827 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT | INPUT_DEVICE_ID_MATCH_ABSBIT, | |
828 | .evbit = { BIT(EV_KEY) | BIT(EV_ABS) }, | |
829 | .keybit = { [LONG(BTN_TOOL_FINGER)] = BIT(BTN_TOOL_FINGER) }, | |
830 | .absbit = { BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE) | BIT(ABS_TOOL_WIDTH) }, | |
831 | }, /* A touchpad */ | |
832 | ||
d0ffb9be | 833 | { }, /* Terminating entry */ |
1da177e4 LT |
834 | }; |
835 | ||
836 | MODULE_DEVICE_TABLE(input, mousedev_ids); | |
837 | ||
838 | static struct input_handler mousedev_handler = { | |
839 | .event = mousedev_event, | |
840 | .connect = mousedev_connect, | |
841 | .disconnect = mousedev_disconnect, | |
842 | .fops = &mousedev_fops, | |
843 | .minor = MOUSEDEV_MINOR_BASE, | |
844 | .name = "mousedev", | |
845 | .id_table = mousedev_ids, | |
846 | }; | |
847 | ||
848 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
849 | static struct miscdevice psaux_mouse = { | |
850 | PSMOUSE_MINOR, "psaux", &mousedev_fops | |
851 | }; | |
852 | static int psaux_registered; | |
853 | #endif | |
854 | ||
855 | static int __init mousedev_init(void) | |
856 | { | |
4263cf0f DT |
857 | int error; |
858 | ||
9657d75c DT |
859 | mousedev_mix = mousedev_create(NULL, &mousedev_handler, MOUSEDEV_MIX); |
860 | if (IS_ERR(mousedev_mix)) | |
861 | return PTR_ERR(mousedev_mix); | |
862 | ||
4263cf0f | 863 | error = input_register_handler(&mousedev_handler); |
9657d75c DT |
864 | if (error) { |
865 | mousedev_destroy(mousedev_mix); | |
4263cf0f | 866 | return error; |
4263cf0f | 867 | } |
1da177e4 LT |
868 | |
869 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
4263cf0f DT |
870 | error = misc_register(&psaux_mouse); |
871 | if (error) | |
872 | printk(KERN_WARNING "mice: could not register psaux device, " | |
873 | "error: %d\n", error); | |
874 | else | |
875 | psaux_registered = 1; | |
1da177e4 LT |
876 | #endif |
877 | ||
878 | printk(KERN_INFO "mice: PS/2 mouse device common for all mice\n"); | |
879 | ||
880 | return 0; | |
881 | } | |
882 | ||
883 | static void __exit mousedev_exit(void) | |
884 | { | |
885 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX | |
886 | if (psaux_registered) | |
887 | misc_deregister(&psaux_mouse); | |
888 | #endif | |
1da177e4 | 889 | input_unregister_handler(&mousedev_handler); |
9657d75c | 890 | mousedev_destroy(mousedev_mix); |
1da177e4 LT |
891 | } |
892 | ||
893 | module_init(mousedev_init); | |
894 | module_exit(mousedev_exit); |