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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * The input core | |
3 | * | |
4 | * Copyright (c) 1999-2002 Vojtech Pavlik | |
5 | */ | |
6 | ||
7 | /* | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License version 2 as published by | |
10 | * the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <linux/init.h> | |
1da177e4 LT |
14 | #include <linux/input.h> |
15 | #include <linux/module.h> | |
16 | #include <linux/random.h> | |
17 | #include <linux/major.h> | |
18 | #include <linux/proc_fs.h> | |
969b21cd | 19 | #include <linux/seq_file.h> |
1da177e4 LT |
20 | #include <linux/interrupt.h> |
21 | #include <linux/poll.h> | |
22 | #include <linux/device.h> | |
e676c232 | 23 | #include <linux/mutex.h> |
1da177e4 LT |
24 | |
25 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); | |
26 | MODULE_DESCRIPTION("Input core"); | |
27 | MODULE_LICENSE("GPL"); | |
28 | ||
1da177e4 LT |
29 | #define INPUT_DEVICES 256 |
30 | ||
31 | static LIST_HEAD(input_dev_list); | |
32 | static LIST_HEAD(input_handler_list); | |
33 | ||
34 | static struct input_handler *input_table[8]; | |
35 | ||
0e739d28 DT |
36 | /** |
37 | * input_event() - report new input event | |
1447190e | 38 | * @dev: device that generated the event |
0e739d28 DT |
39 | * @type: type of the event |
40 | * @code: event code | |
41 | * @value: value of the event | |
42 | * | |
43 | * This function should be used by drivers implementing various input devices | |
44 | * See also input_inject_event() | |
45 | */ | |
1da177e4 LT |
46 | void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) |
47 | { | |
48 | struct input_handle *handle; | |
49 | ||
50 | if (type > EV_MAX || !test_bit(type, dev->evbit)) | |
51 | return; | |
52 | ||
53 | add_input_randomness(type, code, value); | |
54 | ||
55 | switch (type) { | |
56 | ||
57 | case EV_SYN: | |
58 | switch (code) { | |
59 | case SYN_CONFIG: | |
1e0afb28 DT |
60 | if (dev->event) |
61 | dev->event(dev, type, code, value); | |
1da177e4 LT |
62 | break; |
63 | ||
64 | case SYN_REPORT: | |
1e0afb28 DT |
65 | if (dev->sync) |
66 | return; | |
1da177e4 LT |
67 | dev->sync = 1; |
68 | break; | |
69 | } | |
70 | break; | |
71 | ||
72 | case EV_KEY: | |
73 | ||
74 | if (code > KEY_MAX || !test_bit(code, dev->keybit) || !!test_bit(code, dev->key) == value) | |
75 | return; | |
76 | ||
77 | if (value == 2) | |
78 | break; | |
79 | ||
80 | change_bit(code, dev->key); | |
81 | ||
82 | if (test_bit(EV_REP, dev->evbit) && dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && dev->timer.data && value) { | |
83 | dev->repeat_key = code; | |
84 | mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_DELAY])); | |
85 | } | |
86 | ||
87 | break; | |
88 | ||
31581066 RP |
89 | case EV_SW: |
90 | ||
91 | if (code > SW_MAX || !test_bit(code, dev->swbit) || !!test_bit(code, dev->sw) == value) | |
92 | return; | |
93 | ||
94 | change_bit(code, dev->sw); | |
95 | ||
96 | break; | |
97 | ||
1da177e4 LT |
98 | case EV_ABS: |
99 | ||
100 | if (code > ABS_MAX || !test_bit(code, dev->absbit)) | |
101 | return; | |
102 | ||
103 | if (dev->absfuzz[code]) { | |
104 | if ((value > dev->abs[code] - (dev->absfuzz[code] >> 1)) && | |
105 | (value < dev->abs[code] + (dev->absfuzz[code] >> 1))) | |
106 | return; | |
107 | ||
108 | if ((value > dev->abs[code] - dev->absfuzz[code]) && | |
109 | (value < dev->abs[code] + dev->absfuzz[code])) | |
110 | value = (dev->abs[code] * 3 + value) >> 2; | |
111 | ||
112 | if ((value > dev->abs[code] - (dev->absfuzz[code] << 1)) && | |
113 | (value < dev->abs[code] + (dev->absfuzz[code] << 1))) | |
114 | value = (dev->abs[code] + value) >> 1; | |
115 | } | |
116 | ||
117 | if (dev->abs[code] == value) | |
118 | return; | |
119 | ||
120 | dev->abs[code] = value; | |
121 | break; | |
122 | ||
123 | case EV_REL: | |
124 | ||
125 | if (code > REL_MAX || !test_bit(code, dev->relbit) || (value == 0)) | |
126 | return; | |
127 | ||
128 | break; | |
129 | ||
130 | case EV_MSC: | |
131 | ||
132 | if (code > MSC_MAX || !test_bit(code, dev->mscbit)) | |
133 | return; | |
134 | ||
1e0afb28 DT |
135 | if (dev->event) |
136 | dev->event(dev, type, code, value); | |
1da177e4 LT |
137 | |
138 | break; | |
139 | ||
140 | case EV_LED: | |
141 | ||
142 | if (code > LED_MAX || !test_bit(code, dev->ledbit) || !!test_bit(code, dev->led) == value) | |
143 | return; | |
144 | ||
145 | change_bit(code, dev->led); | |
1e0afb28 DT |
146 | |
147 | if (dev->event) | |
148 | dev->event(dev, type, code, value); | |
1da177e4 LT |
149 | |
150 | break; | |
151 | ||
152 | case EV_SND: | |
153 | ||
154 | if (code > SND_MAX || !test_bit(code, dev->sndbit)) | |
155 | return; | |
156 | ||
8fdc1948 DT |
157 | if (!!test_bit(code, dev->snd) != !!value) |
158 | change_bit(code, dev->snd); | |
159 | ||
1e0afb28 DT |
160 | if (dev->event) |
161 | dev->event(dev, type, code, value); | |
1da177e4 LT |
162 | |
163 | break; | |
164 | ||
165 | case EV_REP: | |
166 | ||
1e0afb28 DT |
167 | if (code > REP_MAX || value < 0 || dev->rep[code] == value) |
168 | return; | |
1da177e4 LT |
169 | |
170 | dev->rep[code] = value; | |
1e0afb28 DT |
171 | if (dev->event) |
172 | dev->event(dev, type, code, value); | |
1da177e4 LT |
173 | |
174 | break; | |
175 | ||
176 | case EV_FF: | |
509ca1a9 AH |
177 | |
178 | if (value < 0) | |
179 | return; | |
180 | ||
1e0afb28 DT |
181 | if (dev->event) |
182 | dev->event(dev, type, code, value); | |
1da177e4 LT |
183 | break; |
184 | } | |
185 | ||
186 | if (type != EV_SYN) | |
187 | dev->sync = 0; | |
188 | ||
189 | if (dev->grab) | |
190 | dev->grab->handler->event(dev->grab, type, code, value); | |
191 | else | |
192 | list_for_each_entry(handle, &dev->h_list, d_node) | |
193 | if (handle->open) | |
194 | handle->handler->event(handle, type, code, value); | |
195 | } | |
ca56fe07 | 196 | EXPORT_SYMBOL(input_event); |
1da177e4 | 197 | |
0e739d28 DT |
198 | /** |
199 | * input_inject_event() - send input event from input handler | |
200 | * @handle: input handle to send event through | |
201 | * @type: type of the event | |
202 | * @code: event code | |
203 | * @value: value of the event | |
204 | * | |
205 | * Similar to input_event() but will ignore event if device is "grabbed" and handle | |
206 | * injecting event is not the one that owns the device. | |
207 | */ | |
208 | void input_inject_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) | |
209 | { | |
210 | if (!handle->dev->grab || handle->dev->grab == handle) | |
211 | input_event(handle->dev, type, code, value); | |
212 | } | |
213 | EXPORT_SYMBOL(input_inject_event); | |
214 | ||
1da177e4 LT |
215 | static void input_repeat_key(unsigned long data) |
216 | { | |
217 | struct input_dev *dev = (void *) data; | |
218 | ||
219 | if (!test_bit(dev->repeat_key, dev->key)) | |
220 | return; | |
221 | ||
222 | input_event(dev, EV_KEY, dev->repeat_key, 2); | |
223 | input_sync(dev); | |
224 | ||
225 | if (dev->rep[REP_PERIOD]) | |
226 | mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_PERIOD])); | |
227 | } | |
228 | ||
1da177e4 LT |
229 | int input_grab_device(struct input_handle *handle) |
230 | { | |
231 | if (handle->dev->grab) | |
232 | return -EBUSY; | |
233 | ||
234 | handle->dev->grab = handle; | |
235 | return 0; | |
236 | } | |
ca56fe07 | 237 | EXPORT_SYMBOL(input_grab_device); |
1da177e4 LT |
238 | |
239 | void input_release_device(struct input_handle *handle) | |
240 | { | |
a2b2ed2c | 241 | struct input_dev *dev = handle->dev; |
c7e8dc6e | 242 | |
a2b2ed2c AM |
243 | if (dev->grab == handle) { |
244 | dev->grab = NULL; | |
245 | ||
246 | list_for_each_entry(handle, &dev->h_list, d_node) | |
c7e8dc6e DT |
247 | if (handle->handler->start) |
248 | handle->handler->start(handle); | |
249 | } | |
1da177e4 | 250 | } |
ca56fe07 | 251 | EXPORT_SYMBOL(input_release_device); |
1da177e4 LT |
252 | |
253 | int input_open_device(struct input_handle *handle) | |
254 | { | |
0fbf87ca DT |
255 | struct input_dev *dev = handle->dev; |
256 | int err; | |
257 | ||
e676c232 | 258 | err = mutex_lock_interruptible(&dev->mutex); |
0fbf87ca DT |
259 | if (err) |
260 | return err; | |
261 | ||
1da177e4 | 262 | handle->open++; |
0fbf87ca DT |
263 | |
264 | if (!dev->users++ && dev->open) | |
265 | err = dev->open(dev); | |
266 | ||
267 | if (err) | |
268 | handle->open--; | |
269 | ||
e676c232 | 270 | mutex_unlock(&dev->mutex); |
0fbf87ca DT |
271 | |
272 | return err; | |
1da177e4 | 273 | } |
ca56fe07 | 274 | EXPORT_SYMBOL(input_open_device); |
1da177e4 LT |
275 | |
276 | int input_flush_device(struct input_handle* handle, struct file* file) | |
277 | { | |
278 | if (handle->dev->flush) | |
279 | return handle->dev->flush(handle->dev, file); | |
280 | ||
281 | return 0; | |
282 | } | |
ca56fe07 | 283 | EXPORT_SYMBOL(input_flush_device); |
1da177e4 LT |
284 | |
285 | void input_close_device(struct input_handle *handle) | |
286 | { | |
0fbf87ca DT |
287 | struct input_dev *dev = handle->dev; |
288 | ||
1da177e4 | 289 | input_release_device(handle); |
0fbf87ca | 290 | |
e676c232 | 291 | mutex_lock(&dev->mutex); |
0fbf87ca DT |
292 | |
293 | if (!--dev->users && dev->close) | |
294 | dev->close(dev); | |
1da177e4 | 295 | handle->open--; |
0fbf87ca | 296 | |
e676c232 | 297 | mutex_unlock(&dev->mutex); |
1da177e4 | 298 | } |
ca56fe07 | 299 | EXPORT_SYMBOL(input_close_device); |
1da177e4 | 300 | |
c8e4c772 MR |
301 | static int input_fetch_keycode(struct input_dev *dev, int scancode) |
302 | { | |
303 | switch (dev->keycodesize) { | |
304 | case 1: | |
305 | return ((u8 *)dev->keycode)[scancode]; | |
306 | ||
307 | case 2: | |
308 | return ((u16 *)dev->keycode)[scancode]; | |
309 | ||
310 | default: | |
311 | return ((u32 *)dev->keycode)[scancode]; | |
312 | } | |
313 | } | |
314 | ||
315 | static int input_default_getkeycode(struct input_dev *dev, | |
316 | int scancode, int *keycode) | |
317 | { | |
318 | if (!dev->keycodesize) | |
319 | return -EINVAL; | |
320 | ||
321 | if (scancode < 0 || scancode >= dev->keycodemax) | |
322 | return -EINVAL; | |
323 | ||
324 | *keycode = input_fetch_keycode(dev, scancode); | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
329 | static int input_default_setkeycode(struct input_dev *dev, | |
330 | int scancode, int keycode) | |
331 | { | |
332 | int old_keycode; | |
333 | int i; | |
334 | ||
335 | if (scancode < 0 || scancode >= dev->keycodemax) | |
336 | return -EINVAL; | |
337 | ||
338 | if (keycode < 0 || keycode > KEY_MAX) | |
339 | return -EINVAL; | |
340 | ||
341 | if (!dev->keycodesize) | |
342 | return -EINVAL; | |
343 | ||
344 | if (dev->keycodesize < sizeof(keycode) && (keycode >> (dev->keycodesize * 8))) | |
345 | return -EINVAL; | |
346 | ||
347 | switch (dev->keycodesize) { | |
348 | case 1: { | |
349 | u8 *k = (u8 *)dev->keycode; | |
350 | old_keycode = k[scancode]; | |
351 | k[scancode] = keycode; | |
352 | break; | |
353 | } | |
354 | case 2: { | |
355 | u16 *k = (u16 *)dev->keycode; | |
356 | old_keycode = k[scancode]; | |
357 | k[scancode] = keycode; | |
358 | break; | |
359 | } | |
360 | default: { | |
361 | u32 *k = (u32 *)dev->keycode; | |
362 | old_keycode = k[scancode]; | |
363 | k[scancode] = keycode; | |
364 | break; | |
365 | } | |
366 | } | |
367 | ||
368 | clear_bit(old_keycode, dev->keybit); | |
369 | set_bit(keycode, dev->keybit); | |
370 | ||
371 | for (i = 0; i < dev->keycodemax; i++) { | |
372 | if (input_fetch_keycode(dev, i) == old_keycode) { | |
373 | set_bit(old_keycode, dev->keybit); | |
374 | break; /* Setting the bit twice is useless, so break */ | |
375 | } | |
376 | } | |
377 | ||
378 | return 0; | |
379 | } | |
380 | ||
381 | ||
1da177e4 LT |
382 | #define MATCH_BIT(bit, max) \ |
383 | for (i = 0; i < NBITS(max); i++) \ | |
384 | if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \ | |
385 | break; \ | |
386 | if (i != NBITS(max)) \ | |
387 | continue; | |
388 | ||
66e66118 DT |
389 | static const struct input_device_id *input_match_device(const struct input_device_id *id, |
390 | struct input_dev *dev) | |
1da177e4 LT |
391 | { |
392 | int i; | |
393 | ||
394 | for (; id->flags || id->driver_info; id++) { | |
395 | ||
396 | if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) | |
ddc5d341 | 397 | if (id->bustype != dev->id.bustype) |
1da177e4 LT |
398 | continue; |
399 | ||
400 | if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) | |
ddc5d341 | 401 | if (id->vendor != dev->id.vendor) |
1da177e4 LT |
402 | continue; |
403 | ||
404 | if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) | |
ddc5d341 | 405 | if (id->product != dev->id.product) |
1da177e4 LT |
406 | continue; |
407 | ||
408 | if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) | |
ddc5d341 | 409 | if (id->version != dev->id.version) |
1da177e4 LT |
410 | continue; |
411 | ||
412 | MATCH_BIT(evbit, EV_MAX); | |
413 | MATCH_BIT(keybit, KEY_MAX); | |
414 | MATCH_BIT(relbit, REL_MAX); | |
415 | MATCH_BIT(absbit, ABS_MAX); | |
416 | MATCH_BIT(mscbit, MSC_MAX); | |
417 | MATCH_BIT(ledbit, LED_MAX); | |
418 | MATCH_BIT(sndbit, SND_MAX); | |
419 | MATCH_BIT(ffbit, FF_MAX); | |
ff13f98b | 420 | MATCH_BIT(swbit, SW_MAX); |
1da177e4 LT |
421 | |
422 | return id; | |
423 | } | |
424 | ||
425 | return NULL; | |
426 | } | |
427 | ||
5b2a0826 DT |
428 | static int input_attach_handler(struct input_dev *dev, struct input_handler *handler) |
429 | { | |
430 | const struct input_device_id *id; | |
431 | int error; | |
432 | ||
433 | if (handler->blacklist && input_match_device(handler->blacklist, dev)) | |
434 | return -ENODEV; | |
435 | ||
436 | id = input_match_device(handler->id_table, dev); | |
437 | if (!id) | |
438 | return -ENODEV; | |
439 | ||
440 | error = handler->connect(handler, dev, id); | |
441 | if (error && error != -ENODEV) | |
442 | printk(KERN_ERR | |
443 | "input: failed to attach handler %s to device %s, " | |
444 | "error: %d\n", | |
9657d75c | 445 | handler->name, kobject_name(&dev->dev.kobj), error); |
5b2a0826 DT |
446 | |
447 | return error; | |
448 | } | |
449 | ||
450 | ||
f96b434d DT |
451 | #ifdef CONFIG_PROC_FS |
452 | ||
453 | static struct proc_dir_entry *proc_bus_input_dir; | |
454 | static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait); | |
455 | static int input_devices_state; | |
456 | ||
457 | static inline void input_wakeup_procfs_readers(void) | |
458 | { | |
459 | input_devices_state++; | |
460 | wake_up(&input_devices_poll_wait); | |
461 | } | |
462 | ||
969b21cd | 463 | static unsigned int input_proc_devices_poll(struct file *file, poll_table *wait) |
f96b434d DT |
464 | { |
465 | int state = input_devices_state; | |
1e0afb28 | 466 | |
f96b434d DT |
467 | poll_wait(file, &input_devices_poll_wait, wait); |
468 | if (state != input_devices_state) | |
469 | return POLLIN | POLLRDNORM; | |
1e0afb28 | 470 | |
f96b434d DT |
471 | return 0; |
472 | } | |
473 | ||
969b21cd DT |
474 | static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos) |
475 | { | |
476 | /* acquire lock here ... Yes, we do need locking, I knowi, I know... */ | |
f96b434d | 477 | |
ad5d972c | 478 | return seq_list_start(&input_dev_list, *pos); |
969b21cd | 479 | } |
051b2fea | 480 | |
969b21cd DT |
481 | static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
482 | { | |
ad5d972c | 483 | return seq_list_next(v, &input_dev_list, pos); |
969b21cd | 484 | } |
f96b434d | 485 | |
969b21cd DT |
486 | static void input_devices_seq_stop(struct seq_file *seq, void *v) |
487 | { | |
488 | /* release lock here */ | |
489 | } | |
f96b434d | 490 | |
969b21cd DT |
491 | static void input_seq_print_bitmap(struct seq_file *seq, const char *name, |
492 | unsigned long *bitmap, int max) | |
493 | { | |
494 | int i; | |
051b2fea | 495 | |
969b21cd DT |
496 | for (i = NBITS(max) - 1; i > 0; i--) |
497 | if (bitmap[i]) | |
498 | break; | |
f96b434d | 499 | |
969b21cd DT |
500 | seq_printf(seq, "B: %s=", name); |
501 | for (; i >= 0; i--) | |
502 | seq_printf(seq, "%lx%s", bitmap[i], i > 0 ? " " : ""); | |
503 | seq_putc(seq, '\n'); | |
504 | } | |
f96b434d | 505 | |
969b21cd DT |
506 | static int input_devices_seq_show(struct seq_file *seq, void *v) |
507 | { | |
508 | struct input_dev *dev = container_of(v, struct input_dev, node); | |
9657d75c | 509 | const char *path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
969b21cd DT |
510 | struct input_handle *handle; |
511 | ||
512 | seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n", | |
513 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); | |
514 | ||
515 | seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); | |
516 | seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : ""); | |
517 | seq_printf(seq, "S: Sysfs=%s\n", path ? path : ""); | |
15e03ae8 | 518 | seq_printf(seq, "U: Uniq=%s\n", dev->uniq ? dev->uniq : ""); |
969b21cd DT |
519 | seq_printf(seq, "H: Handlers="); |
520 | ||
521 | list_for_each_entry(handle, &dev->h_list, d_node) | |
522 | seq_printf(seq, "%s ", handle->name); | |
523 | seq_putc(seq, '\n'); | |
524 | ||
525 | input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX); | |
526 | if (test_bit(EV_KEY, dev->evbit)) | |
527 | input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX); | |
528 | if (test_bit(EV_REL, dev->evbit)) | |
529 | input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX); | |
530 | if (test_bit(EV_ABS, dev->evbit)) | |
531 | input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX); | |
532 | if (test_bit(EV_MSC, dev->evbit)) | |
533 | input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX); | |
534 | if (test_bit(EV_LED, dev->evbit)) | |
535 | input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX); | |
536 | if (test_bit(EV_SND, dev->evbit)) | |
537 | input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX); | |
538 | if (test_bit(EV_FF, dev->evbit)) | |
539 | input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX); | |
540 | if (test_bit(EV_SW, dev->evbit)) | |
541 | input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX); | |
542 | ||
543 | seq_putc(seq, '\n'); | |
544 | ||
545 | kfree(path); | |
546 | return 0; | |
f96b434d DT |
547 | } |
548 | ||
969b21cd DT |
549 | static struct seq_operations input_devices_seq_ops = { |
550 | .start = input_devices_seq_start, | |
551 | .next = input_devices_seq_next, | |
552 | .stop = input_devices_seq_stop, | |
553 | .show = input_devices_seq_show, | |
554 | }; | |
555 | ||
556 | static int input_proc_devices_open(struct inode *inode, struct file *file) | |
f96b434d | 557 | { |
969b21cd DT |
558 | return seq_open(file, &input_devices_seq_ops); |
559 | } | |
560 | ||
2b8693c0 | 561 | static const struct file_operations input_devices_fileops = { |
969b21cd DT |
562 | .owner = THIS_MODULE, |
563 | .open = input_proc_devices_open, | |
564 | .poll = input_proc_devices_poll, | |
565 | .read = seq_read, | |
566 | .llseek = seq_lseek, | |
567 | .release = seq_release, | |
568 | }; | |
569 | ||
570 | static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos) | |
571 | { | |
572 | /* acquire lock here ... Yes, we do need locking, I knowi, I know... */ | |
573 | seq->private = (void *)(unsigned long)*pos; | |
ad5d972c | 574 | return seq_list_start(&input_handler_list, *pos); |
969b21cd | 575 | } |
f96b434d | 576 | |
969b21cd DT |
577 | static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
578 | { | |
579 | seq->private = (void *)(unsigned long)(*pos + 1); | |
ad5d972c | 580 | return seq_list_next(v, &input_handler_list, pos); |
f96b434d DT |
581 | } |
582 | ||
969b21cd DT |
583 | static void input_handlers_seq_stop(struct seq_file *seq, void *v) |
584 | { | |
585 | /* release lock here */ | |
586 | } | |
587 | ||
588 | static int input_handlers_seq_show(struct seq_file *seq, void *v) | |
589 | { | |
590 | struct input_handler *handler = container_of(v, struct input_handler, node); | |
591 | ||
592 | seq_printf(seq, "N: Number=%ld Name=%s", | |
593 | (unsigned long)seq->private, handler->name); | |
594 | if (handler->fops) | |
595 | seq_printf(seq, " Minor=%d", handler->minor); | |
596 | seq_putc(seq, '\n'); | |
597 | ||
598 | return 0; | |
599 | } | |
600 | static struct seq_operations input_handlers_seq_ops = { | |
601 | .start = input_handlers_seq_start, | |
602 | .next = input_handlers_seq_next, | |
603 | .stop = input_handlers_seq_stop, | |
604 | .show = input_handlers_seq_show, | |
605 | }; | |
606 | ||
607 | static int input_proc_handlers_open(struct inode *inode, struct file *file) | |
608 | { | |
609 | return seq_open(file, &input_handlers_seq_ops); | |
610 | } | |
611 | ||
2b8693c0 | 612 | static const struct file_operations input_handlers_fileops = { |
969b21cd DT |
613 | .owner = THIS_MODULE, |
614 | .open = input_proc_handlers_open, | |
615 | .read = seq_read, | |
616 | .llseek = seq_lseek, | |
617 | .release = seq_release, | |
618 | }; | |
f96b434d DT |
619 | |
620 | static int __init input_proc_init(void) | |
621 | { | |
622 | struct proc_dir_entry *entry; | |
623 | ||
624 | proc_bus_input_dir = proc_mkdir("input", proc_bus); | |
625 | if (!proc_bus_input_dir) | |
626 | return -ENOMEM; | |
627 | ||
628 | proc_bus_input_dir->owner = THIS_MODULE; | |
629 | ||
969b21cd | 630 | entry = create_proc_entry("devices", 0, proc_bus_input_dir); |
f96b434d DT |
631 | if (!entry) |
632 | goto fail1; | |
633 | ||
634 | entry->owner = THIS_MODULE; | |
969b21cd | 635 | entry->proc_fops = &input_devices_fileops; |
f96b434d | 636 | |
969b21cd | 637 | entry = create_proc_entry("handlers", 0, proc_bus_input_dir); |
f96b434d DT |
638 | if (!entry) |
639 | goto fail2; | |
640 | ||
641 | entry->owner = THIS_MODULE; | |
969b21cd | 642 | entry->proc_fops = &input_handlers_fileops; |
f96b434d DT |
643 | |
644 | return 0; | |
645 | ||
646 | fail2: remove_proc_entry("devices", proc_bus_input_dir); | |
647 | fail1: remove_proc_entry("input", proc_bus); | |
648 | return -ENOMEM; | |
649 | } | |
650 | ||
beffbdc2 | 651 | static void input_proc_exit(void) |
f96b434d DT |
652 | { |
653 | remove_proc_entry("devices", proc_bus_input_dir); | |
654 | remove_proc_entry("handlers", proc_bus_input_dir); | |
655 | remove_proc_entry("input", proc_bus); | |
656 | } | |
657 | ||
658 | #else /* !CONFIG_PROC_FS */ | |
659 | static inline void input_wakeup_procfs_readers(void) { } | |
660 | static inline int input_proc_init(void) { return 0; } | |
661 | static inline void input_proc_exit(void) { } | |
662 | #endif | |
663 | ||
9657d75c DT |
664 | #define INPUT_DEV_STRING_ATTR_SHOW(name) \ |
665 | static ssize_t input_dev_show_##name(struct device *dev, \ | |
666 | struct device_attribute *attr, \ | |
667 | char *buf) \ | |
668 | { \ | |
669 | struct input_dev *input_dev = to_input_dev(dev); \ | |
670 | \ | |
671 | return scnprintf(buf, PAGE_SIZE, "%s\n", \ | |
672 | input_dev->name ? input_dev->name : ""); \ | |
673 | } \ | |
674 | static DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL) | |
5c1e9a6a DT |
675 | |
676 | INPUT_DEV_STRING_ATTR_SHOW(name); | |
677 | INPUT_DEV_STRING_ATTR_SHOW(phys); | |
678 | INPUT_DEV_STRING_ATTR_SHOW(uniq); | |
679 | ||
ac648a6a DT |
680 | static int input_print_modalias_bits(char *buf, int size, |
681 | char name, unsigned long *bm, | |
682 | unsigned int min_bit, unsigned int max_bit) | |
1d8f430c | 683 | { |
ac648a6a | 684 | int len = 0, i; |
1d8f430c | 685 | |
ac648a6a DT |
686 | len += snprintf(buf, max(size, 0), "%c", name); |
687 | for (i = min_bit; i < max_bit; i++) | |
688 | if (bm[LONG(i)] & BIT(i)) | |
689 | len += snprintf(buf + len, max(size - len, 0), "%X,", i); | |
1d8f430c RR |
690 | return len; |
691 | } | |
692 | ||
2db66876 DT |
693 | static int input_print_modalias(char *buf, int size, struct input_dev *id, |
694 | int add_cr) | |
1d8f430c | 695 | { |
bd37e5a9 | 696 | int len; |
1d8f430c | 697 | |
ac648a6a DT |
698 | len = snprintf(buf, max(size, 0), |
699 | "input:b%04Xv%04Xp%04Xe%04X-", | |
700 | id->id.bustype, id->id.vendor, | |
701 | id->id.product, id->id.version); | |
702 | ||
703 | len += input_print_modalias_bits(buf + len, size - len, | |
704 | 'e', id->evbit, 0, EV_MAX); | |
705 | len += input_print_modalias_bits(buf + len, size - len, | |
706 | 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX); | |
707 | len += input_print_modalias_bits(buf + len, size - len, | |
708 | 'r', id->relbit, 0, REL_MAX); | |
709 | len += input_print_modalias_bits(buf + len, size - len, | |
710 | 'a', id->absbit, 0, ABS_MAX); | |
711 | len += input_print_modalias_bits(buf + len, size - len, | |
712 | 'm', id->mscbit, 0, MSC_MAX); | |
713 | len += input_print_modalias_bits(buf + len, size - len, | |
714 | 'l', id->ledbit, 0, LED_MAX); | |
715 | len += input_print_modalias_bits(buf + len, size - len, | |
716 | 's', id->sndbit, 0, SND_MAX); | |
717 | len += input_print_modalias_bits(buf + len, size - len, | |
718 | 'f', id->ffbit, 0, FF_MAX); | |
719 | len += input_print_modalias_bits(buf + len, size - len, | |
720 | 'w', id->swbit, 0, SW_MAX); | |
2db66876 DT |
721 | |
722 | if (add_cr) | |
ac648a6a | 723 | len += snprintf(buf + len, max(size - len, 0), "\n"); |
2db66876 | 724 | |
bd37e5a9 KS |
725 | return len; |
726 | } | |
727 | ||
9657d75c DT |
728 | static ssize_t input_dev_show_modalias(struct device *dev, |
729 | struct device_attribute *attr, | |
730 | char *buf) | |
bd37e5a9 KS |
731 | { |
732 | struct input_dev *id = to_input_dev(dev); | |
733 | ssize_t len; | |
734 | ||
2db66876 DT |
735 | len = input_print_modalias(buf, PAGE_SIZE, id, 1); |
736 | ||
8a3cf456 | 737 | return min_t(int, len, PAGE_SIZE); |
1d8f430c | 738 | } |
9657d75c | 739 | static DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL); |
1d8f430c | 740 | |
629b77a4 | 741 | static struct attribute *input_dev_attrs[] = { |
9657d75c DT |
742 | &dev_attr_name.attr, |
743 | &dev_attr_phys.attr, | |
744 | &dev_attr_uniq.attr, | |
745 | &dev_attr_modalias.attr, | |
629b77a4 GKH |
746 | NULL |
747 | }; | |
748 | ||
bd0ef235 | 749 | static struct attribute_group input_dev_attr_group = { |
629b77a4 | 750 | .attrs = input_dev_attrs, |
5c1e9a6a DT |
751 | }; |
752 | ||
9657d75c DT |
753 | #define INPUT_DEV_ID_ATTR(name) \ |
754 | static ssize_t input_dev_show_id_##name(struct device *dev, \ | |
755 | struct device_attribute *attr, \ | |
756 | char *buf) \ | |
757 | { \ | |
758 | struct input_dev *input_dev = to_input_dev(dev); \ | |
759 | return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \ | |
760 | } \ | |
761 | static DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL) | |
5c1e9a6a DT |
762 | |
763 | INPUT_DEV_ID_ATTR(bustype); | |
764 | INPUT_DEV_ID_ATTR(vendor); | |
765 | INPUT_DEV_ID_ATTR(product); | |
766 | INPUT_DEV_ID_ATTR(version); | |
767 | ||
768 | static struct attribute *input_dev_id_attrs[] = { | |
9657d75c DT |
769 | &dev_attr_bustype.attr, |
770 | &dev_attr_vendor.attr, | |
771 | &dev_attr_product.attr, | |
772 | &dev_attr_version.attr, | |
5c1e9a6a DT |
773 | NULL |
774 | }; | |
775 | ||
776 | static struct attribute_group input_dev_id_attr_group = { | |
777 | .name = "id", | |
778 | .attrs = input_dev_id_attrs, | |
779 | }; | |
780 | ||
969b21cd DT |
781 | static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap, |
782 | int max, int add_cr) | |
783 | { | |
784 | int i; | |
785 | int len = 0; | |
786 | ||
787 | for (i = NBITS(max) - 1; i > 0; i--) | |
788 | if (bitmap[i]) | |
789 | break; | |
790 | ||
791 | for (; i >= 0; i--) | |
792 | len += snprintf(buf + len, max(buf_size - len, 0), | |
793 | "%lx%s", bitmap[i], i > 0 ? " " : ""); | |
794 | ||
795 | if (add_cr) | |
796 | len += snprintf(buf + len, max(buf_size - len, 0), "\n"); | |
797 | ||
798 | return len; | |
799 | } | |
800 | ||
9657d75c DT |
801 | #define INPUT_DEV_CAP_ATTR(ev, bm) \ |
802 | static ssize_t input_dev_show_cap_##bm(struct device *dev, \ | |
803 | struct device_attribute *attr, \ | |
804 | char *buf) \ | |
805 | { \ | |
806 | struct input_dev *input_dev = to_input_dev(dev); \ | |
807 | int len = input_print_bitmap(buf, PAGE_SIZE, \ | |
808 | input_dev->bm##bit, ev##_MAX, 1); \ | |
809 | return min_t(int, len, PAGE_SIZE); \ | |
810 | } \ | |
811 | static DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL) | |
5c1e9a6a DT |
812 | |
813 | INPUT_DEV_CAP_ATTR(EV, ev); | |
814 | INPUT_DEV_CAP_ATTR(KEY, key); | |
815 | INPUT_DEV_CAP_ATTR(REL, rel); | |
816 | INPUT_DEV_CAP_ATTR(ABS, abs); | |
817 | INPUT_DEV_CAP_ATTR(MSC, msc); | |
818 | INPUT_DEV_CAP_ATTR(LED, led); | |
819 | INPUT_DEV_CAP_ATTR(SND, snd); | |
820 | INPUT_DEV_CAP_ATTR(FF, ff); | |
821 | INPUT_DEV_CAP_ATTR(SW, sw); | |
822 | ||
823 | static struct attribute *input_dev_caps_attrs[] = { | |
9657d75c DT |
824 | &dev_attr_ev.attr, |
825 | &dev_attr_key.attr, | |
826 | &dev_attr_rel.attr, | |
827 | &dev_attr_abs.attr, | |
828 | &dev_attr_msc.attr, | |
829 | &dev_attr_led.attr, | |
830 | &dev_attr_snd.attr, | |
831 | &dev_attr_ff.attr, | |
832 | &dev_attr_sw.attr, | |
5c1e9a6a DT |
833 | NULL |
834 | }; | |
835 | ||
836 | static struct attribute_group input_dev_caps_attr_group = { | |
837 | .name = "capabilities", | |
838 | .attrs = input_dev_caps_attrs, | |
839 | }; | |
840 | ||
cb9def4d DT |
841 | static struct attribute_group *input_dev_attr_groups[] = { |
842 | &input_dev_attr_group, | |
843 | &input_dev_id_attr_group, | |
844 | &input_dev_caps_attr_group, | |
845 | NULL | |
846 | }; | |
847 | ||
9657d75c | 848 | static void input_dev_release(struct device *device) |
d19fbe8a | 849 | { |
9657d75c | 850 | struct input_dev *dev = to_input_dev(device); |
d19fbe8a | 851 | |
509ca1a9 | 852 | input_ff_destroy(dev); |
d19fbe8a | 853 | kfree(dev); |
509ca1a9 | 854 | |
d19fbe8a DT |
855 | module_put(THIS_MODULE); |
856 | } | |
857 | ||
a7fadbe1 | 858 | /* |
312c004d | 859 | * Input uevent interface - loading event handlers based on |
a7fadbe1 DT |
860 | * device bitfields. |
861 | */ | |
312c004d | 862 | static int input_add_uevent_bm_var(char **envp, int num_envp, int *cur_index, |
ac648a6a DT |
863 | char *buffer, int buffer_size, int *cur_len, |
864 | const char *name, unsigned long *bitmap, int max) | |
a7fadbe1 DT |
865 | { |
866 | if (*cur_index >= num_envp - 1) | |
867 | return -ENOMEM; | |
868 | ||
869 | envp[*cur_index] = buffer + *cur_len; | |
870 | ||
871 | *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), name); | |
ac648a6a | 872 | if (*cur_len >= buffer_size) |
a7fadbe1 DT |
873 | return -ENOMEM; |
874 | ||
875 | *cur_len += input_print_bitmap(buffer + *cur_len, | |
876 | max(buffer_size - *cur_len, 0), | |
2db66876 | 877 | bitmap, max, 0) + 1; |
a7fadbe1 DT |
878 | if (*cur_len > buffer_size) |
879 | return -ENOMEM; | |
880 | ||
881 | (*cur_index)++; | |
882 | return 0; | |
883 | } | |
884 | ||
ac648a6a DT |
885 | static int input_add_uevent_modalias_var(char **envp, int num_envp, int *cur_index, |
886 | char *buffer, int buffer_size, int *cur_len, | |
887 | struct input_dev *dev) | |
888 | { | |
889 | if (*cur_index >= num_envp - 1) | |
890 | return -ENOMEM; | |
891 | ||
892 | envp[*cur_index] = buffer + *cur_len; | |
893 | ||
894 | *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), | |
895 | "MODALIAS="); | |
896 | if (*cur_len >= buffer_size) | |
897 | return -ENOMEM; | |
898 | ||
899 | *cur_len += input_print_modalias(buffer + *cur_len, | |
900 | max(buffer_size - *cur_len, 0), | |
901 | dev, 0) + 1; | |
902 | if (*cur_len > buffer_size) | |
903 | return -ENOMEM; | |
904 | ||
905 | (*cur_index)++; | |
906 | return 0; | |
907 | } | |
908 | ||
a7fadbe1 DT |
909 | #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \ |
910 | do { \ | |
ac648a6a | 911 | int err = add_uevent_var(envp, num_envp, &i, \ |
a7fadbe1 DT |
912 | buffer, buffer_size, &len, \ |
913 | fmt, val); \ | |
914 | if (err) \ | |
915 | return err; \ | |
916 | } while (0) | |
917 | ||
918 | #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \ | |
919 | do { \ | |
312c004d | 920 | int err = input_add_uevent_bm_var(envp, num_envp, &i, \ |
a7fadbe1 DT |
921 | buffer, buffer_size, &len, \ |
922 | name, bm, max); \ | |
923 | if (err) \ | |
924 | return err; \ | |
925 | } while (0) | |
926 | ||
ac648a6a DT |
927 | #define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev) \ |
928 | do { \ | |
929 | int err = input_add_uevent_modalias_var(envp, \ | |
930 | num_envp, &i, \ | |
931 | buffer, buffer_size, &len, \ | |
932 | dev); \ | |
933 | if (err) \ | |
934 | return err; \ | |
935 | } while (0) | |
936 | ||
9657d75c | 937 | static int input_dev_uevent(struct device *device, char **envp, |
312c004d | 938 | int num_envp, char *buffer, int buffer_size) |
a7fadbe1 | 939 | { |
9657d75c | 940 | struct input_dev *dev = to_input_dev(device); |
a7fadbe1 DT |
941 | int i = 0; |
942 | int len = 0; | |
943 | ||
944 | INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x", | |
945 | dev->id.bustype, dev->id.vendor, | |
946 | dev->id.product, dev->id.version); | |
947 | if (dev->name) | |
948 | INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name); | |
949 | if (dev->phys) | |
950 | INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys); | |
08de1f04 | 951 | if (dev->uniq) |
a7fadbe1 DT |
952 | INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq); |
953 | ||
954 | INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX); | |
955 | if (test_bit(EV_KEY, dev->evbit)) | |
956 | INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX); | |
957 | if (test_bit(EV_REL, dev->evbit)) | |
958 | INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX); | |
959 | if (test_bit(EV_ABS, dev->evbit)) | |
960 | INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX); | |
961 | if (test_bit(EV_MSC, dev->evbit)) | |
962 | INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX); | |
963 | if (test_bit(EV_LED, dev->evbit)) | |
964 | INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX); | |
965 | if (test_bit(EV_SND, dev->evbit)) | |
966 | INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX); | |
967 | if (test_bit(EV_FF, dev->evbit)) | |
968 | INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX); | |
969 | if (test_bit(EV_SW, dev->evbit)) | |
970 | INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX); | |
971 | ||
ac648a6a | 972 | INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev); |
a7fadbe1 | 973 | |
bd37e5a9 | 974 | envp[i] = NULL; |
a7fadbe1 DT |
975 | return 0; |
976 | } | |
977 | ||
9657d75c DT |
978 | static struct device_type input_dev_type = { |
979 | .groups = input_dev_attr_groups, | |
980 | .release = input_dev_release, | |
981 | .uevent = input_dev_uevent, | |
982 | }; | |
983 | ||
ea9f240b | 984 | struct class input_class = { |
9657d75c | 985 | .name = "input", |
d19fbe8a | 986 | }; |
ca56fe07 | 987 | EXPORT_SYMBOL_GPL(input_class); |
d19fbe8a | 988 | |
1447190e DT |
989 | /** |
990 | * input_allocate_device - allocate memory for new input device | |
991 | * | |
992 | * Returns prepared struct input_dev or NULL. | |
993 | * | |
994 | * NOTE: Use input_free_device() to free devices that have not been | |
995 | * registered; input_unregister_device() should be used for already | |
996 | * registered devices. | |
997 | */ | |
d19fbe8a DT |
998 | struct input_dev *input_allocate_device(void) |
999 | { | |
1000 | struct input_dev *dev; | |
1001 | ||
1002 | dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL); | |
1003 | if (dev) { | |
9657d75c DT |
1004 | dev->dev.type = &input_dev_type; |
1005 | dev->dev.class = &input_class; | |
1006 | device_initialize(&dev->dev); | |
f60d2b11 | 1007 | mutex_init(&dev->mutex); |
d19fbe8a DT |
1008 | INIT_LIST_HEAD(&dev->h_list); |
1009 | INIT_LIST_HEAD(&dev->node); | |
655816e4 DT |
1010 | |
1011 | __module_get(THIS_MODULE); | |
d19fbe8a DT |
1012 | } |
1013 | ||
1014 | return dev; | |
1015 | } | |
ca56fe07 | 1016 | EXPORT_SYMBOL(input_allocate_device); |
d19fbe8a | 1017 | |
1447190e DT |
1018 | /** |
1019 | * input_free_device - free memory occupied by input_dev structure | |
1020 | * @dev: input device to free | |
1021 | * | |
1022 | * This function should only be used if input_register_device() | |
1023 | * was not called yet or if it failed. Once device was registered | |
1024 | * use input_unregister_device() and memory will be freed once last | |
1025 | * refrence to the device is dropped. | |
1026 | * | |
1027 | * Device should be allocated by input_allocate_device(). | |
1028 | * | |
1029 | * NOTE: If there are references to the input device then memory | |
1030 | * will not be freed until last reference is dropped. | |
1031 | */ | |
f60d2b11 DT |
1032 | void input_free_device(struct input_dev *dev) |
1033 | { | |
54f9e36c | 1034 | if (dev) |
f60d2b11 | 1035 | input_put_device(dev); |
f60d2b11 | 1036 | } |
ca56fe07 | 1037 | EXPORT_SYMBOL(input_free_device); |
f60d2b11 | 1038 | |
534565f2 DT |
1039 | /** |
1040 | * input_set_capability - mark device as capable of a certain event | |
1041 | * @dev: device that is capable of emitting or accepting event | |
1042 | * @type: type of the event (EV_KEY, EV_REL, etc...) | |
1043 | * @code: event code | |
1044 | * | |
1045 | * In addition to setting up corresponding bit in appropriate capability | |
1046 | * bitmap the function also adjusts dev->evbit. | |
1047 | */ | |
1048 | void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code) | |
1049 | { | |
1050 | switch (type) { | |
1051 | case EV_KEY: | |
1052 | __set_bit(code, dev->keybit); | |
1053 | break; | |
1054 | ||
1055 | case EV_REL: | |
1056 | __set_bit(code, dev->relbit); | |
1057 | break; | |
1058 | ||
1059 | case EV_ABS: | |
1060 | __set_bit(code, dev->absbit); | |
1061 | break; | |
1062 | ||
1063 | case EV_MSC: | |
1064 | __set_bit(code, dev->mscbit); | |
1065 | break; | |
1066 | ||
1067 | case EV_SW: | |
1068 | __set_bit(code, dev->swbit); | |
1069 | break; | |
1070 | ||
1071 | case EV_LED: | |
1072 | __set_bit(code, dev->ledbit); | |
1073 | break; | |
1074 | ||
1075 | case EV_SND: | |
1076 | __set_bit(code, dev->sndbit); | |
1077 | break; | |
1078 | ||
1079 | case EV_FF: | |
1080 | __set_bit(code, dev->ffbit); | |
1081 | break; | |
1082 | ||
1083 | default: | |
1084 | printk(KERN_ERR | |
1085 | "input_set_capability: unknown type %u (code %u)\n", | |
1086 | type, code); | |
1087 | dump_stack(); | |
1088 | return; | |
1089 | } | |
1090 | ||
1091 | __set_bit(type, dev->evbit); | |
1092 | } | |
1093 | EXPORT_SYMBOL(input_set_capability); | |
1094 | ||
5f945489 | 1095 | int input_register_device(struct input_dev *dev) |
1da177e4 | 1096 | { |
bd0ef235 | 1097 | static atomic_t input_no = ATOMIC_INIT(0); |
1da177e4 | 1098 | struct input_handler *handler; |
bd0ef235 DT |
1099 | const char *path; |
1100 | int error; | |
1da177e4 | 1101 | |
5f945489 | 1102 | set_bit(EV_SYN, dev->evbit); |
0fbf87ca | 1103 | |
1da177e4 LT |
1104 | /* |
1105 | * If delay and period are pre-set by the driver, then autorepeating | |
1106 | * is handled by the driver itself and we don't do it in input.c. | |
1107 | */ | |
1108 | ||
1109 | init_timer(&dev->timer); | |
1110 | if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) { | |
1111 | dev->timer.data = (long) dev; | |
1112 | dev->timer.function = input_repeat_key; | |
1113 | dev->rep[REP_DELAY] = 250; | |
1114 | dev->rep[REP_PERIOD] = 33; | |
1115 | } | |
1116 | ||
c8e4c772 MR |
1117 | if (!dev->getkeycode) |
1118 | dev->getkeycode = input_default_getkeycode; | |
1119 | ||
1120 | if (!dev->setkeycode) | |
1121 | dev->setkeycode = input_default_setkeycode; | |
1122 | ||
1da177e4 LT |
1123 | list_add_tail(&dev->node, &input_dev_list); |
1124 | ||
9657d75c | 1125 | snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id), |
bd0ef235 DT |
1126 | "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1); |
1127 | ||
9657d75c DT |
1128 | if (dev->cdev.dev) |
1129 | dev->dev.parent = dev->cdev.dev; | |
88a447a0 | 1130 | |
9657d75c | 1131 | error = device_add(&dev->dev); |
bd0ef235 DT |
1132 | if (error) |
1133 | return error; | |
1134 | ||
9657d75c | 1135 | path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
bd0ef235 DT |
1136 | printk(KERN_INFO "input: %s as %s\n", |
1137 | dev->name ? dev->name : "Unspecified device", path ? path : "N/A"); | |
1138 | kfree(path); | |
10204020 | 1139 | |
1da177e4 | 1140 | list_for_each_entry(handler, &input_handler_list, node) |
5b2a0826 | 1141 | input_attach_handler(dev, handler); |
1da177e4 | 1142 | |
f96b434d | 1143 | input_wakeup_procfs_readers(); |
5f945489 DT |
1144 | |
1145 | return 0; | |
1da177e4 | 1146 | } |
ca56fe07 | 1147 | EXPORT_SYMBOL(input_register_device); |
1da177e4 LT |
1148 | |
1149 | void input_unregister_device(struct input_dev *dev) | |
1150 | { | |
5b2a0826 | 1151 | struct input_handle *handle, *next; |
6d2750c1 | 1152 | int code; |
1da177e4 | 1153 | |
6d2750c1 DT |
1154 | for (code = 0; code <= KEY_MAX; code++) |
1155 | if (test_bit(code, dev->key)) | |
1156 | input_report_key(dev, code, 0); | |
1157 | input_sync(dev); | |
1da177e4 LT |
1158 | |
1159 | del_timer_sync(&dev->timer); | |
1160 | ||
5b2a0826 | 1161 | list_for_each_entry_safe(handle, next, &dev->h_list, d_node) |
1da177e4 | 1162 | handle->handler->disconnect(handle); |
5b2a0826 | 1163 | WARN_ON(!list_empty(&dev->h_list)); |
1da177e4 | 1164 | |
1da177e4 LT |
1165 | list_del_init(&dev->node); |
1166 | ||
9657d75c | 1167 | device_unregister(&dev->dev); |
e7374e48 | 1168 | |
f96b434d | 1169 | input_wakeup_procfs_readers(); |
1da177e4 | 1170 | } |
ca56fe07 | 1171 | EXPORT_SYMBOL(input_unregister_device); |
1da177e4 | 1172 | |
4263cf0f | 1173 | int input_register_handler(struct input_handler *handler) |
1da177e4 LT |
1174 | { |
1175 | struct input_dev *dev; | |
1da177e4 | 1176 | |
1da177e4 LT |
1177 | INIT_LIST_HEAD(&handler->h_list); |
1178 | ||
4263cf0f DT |
1179 | if (handler->fops != NULL) { |
1180 | if (input_table[handler->minor >> 5]) | |
1181 | return -EBUSY; | |
1182 | ||
1da177e4 | 1183 | input_table[handler->minor >> 5] = handler; |
4263cf0f | 1184 | } |
1da177e4 LT |
1185 | |
1186 | list_add_tail(&handler->node, &input_handler_list); | |
1187 | ||
1188 | list_for_each_entry(dev, &input_dev_list, node) | |
5b2a0826 | 1189 | input_attach_handler(dev, handler); |
1da177e4 | 1190 | |
f96b434d | 1191 | input_wakeup_procfs_readers(); |
4263cf0f | 1192 | return 0; |
1da177e4 | 1193 | } |
ca56fe07 | 1194 | EXPORT_SYMBOL(input_register_handler); |
1da177e4 LT |
1195 | |
1196 | void input_unregister_handler(struct input_handler *handler) | |
1197 | { | |
5b2a0826 | 1198 | struct input_handle *handle, *next; |
1da177e4 | 1199 | |
5b2a0826 | 1200 | list_for_each_entry_safe(handle, next, &handler->h_list, h_node) |
1da177e4 | 1201 | handler->disconnect(handle); |
5b2a0826 | 1202 | WARN_ON(!list_empty(&handler->h_list)); |
1da177e4 LT |
1203 | |
1204 | list_del_init(&handler->node); | |
1205 | ||
1206 | if (handler->fops != NULL) | |
1207 | input_table[handler->minor >> 5] = NULL; | |
1208 | ||
f96b434d | 1209 | input_wakeup_procfs_readers(); |
1da177e4 | 1210 | } |
ca56fe07 | 1211 | EXPORT_SYMBOL(input_unregister_handler); |
1da177e4 | 1212 | |
5b2a0826 DT |
1213 | int input_register_handle(struct input_handle *handle) |
1214 | { | |
1215 | struct input_handler *handler = handle->handler; | |
1216 | ||
1217 | list_add_tail(&handle->d_node, &handle->dev->h_list); | |
1218 | list_add_tail(&handle->h_node, &handler->h_list); | |
1219 | ||
1220 | if (handler->start) | |
1221 | handler->start(handle); | |
1222 | ||
1223 | return 0; | |
1224 | } | |
1225 | EXPORT_SYMBOL(input_register_handle); | |
1226 | ||
1227 | void input_unregister_handle(struct input_handle *handle) | |
1228 | { | |
1229 | list_del_init(&handle->h_node); | |
1230 | list_del_init(&handle->d_node); | |
1231 | } | |
1232 | EXPORT_SYMBOL(input_unregister_handle); | |
1233 | ||
1da177e4 LT |
1234 | static int input_open_file(struct inode *inode, struct file *file) |
1235 | { | |
1236 | struct input_handler *handler = input_table[iminor(inode) >> 5]; | |
99ac48f5 | 1237 | const struct file_operations *old_fops, *new_fops = NULL; |
1da177e4 LT |
1238 | int err; |
1239 | ||
1240 | /* No load-on-demand here? */ | |
1241 | if (!handler || !(new_fops = fops_get(handler->fops))) | |
1242 | return -ENODEV; | |
1243 | ||
1244 | /* | |
1245 | * That's _really_ odd. Usually NULL ->open means "nothing special", | |
1246 | * not "no device". Oh, well... | |
1247 | */ | |
1248 | if (!new_fops->open) { | |
1249 | fops_put(new_fops); | |
1250 | return -ENODEV; | |
1251 | } | |
1252 | old_fops = file->f_op; | |
1253 | file->f_op = new_fops; | |
1254 | ||
1255 | err = new_fops->open(inode, file); | |
1256 | ||
1257 | if (err) { | |
1258 | fops_put(file->f_op); | |
1259 | file->f_op = fops_get(old_fops); | |
1260 | } | |
1261 | fops_put(old_fops); | |
1262 | return err; | |
1263 | } | |
1264 | ||
2b8693c0 | 1265 | static const struct file_operations input_fops = { |
1da177e4 LT |
1266 | .owner = THIS_MODULE, |
1267 | .open = input_open_file, | |
1268 | }; | |
1269 | ||
f96b434d | 1270 | static int __init input_init(void) |
1da177e4 | 1271 | { |
f96b434d | 1272 | int err; |
1da177e4 | 1273 | |
ea9f240b | 1274 | err = class_register(&input_class); |
d19fbe8a DT |
1275 | if (err) { |
1276 | printk(KERN_ERR "input: unable to register input_dev class\n"); | |
1277 | return err; | |
1278 | } | |
1279 | ||
f96b434d DT |
1280 | err = input_proc_init(); |
1281 | if (err) | |
b0fdfebb | 1282 | goto fail1; |
1da177e4 | 1283 | |
f96b434d DT |
1284 | err = register_chrdev(INPUT_MAJOR, "input", &input_fops); |
1285 | if (err) { | |
1286 | printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR); | |
b0fdfebb | 1287 | goto fail2; |
1da177e4 | 1288 | } |
e334016f | 1289 | |
1da177e4 | 1290 | return 0; |
1da177e4 | 1291 | |
b0fdfebb | 1292 | fail2: input_proc_exit(); |
ea9f240b | 1293 | fail1: class_unregister(&input_class); |
f96b434d | 1294 | return err; |
1da177e4 LT |
1295 | } |
1296 | ||
1297 | static void __exit input_exit(void) | |
1298 | { | |
f96b434d | 1299 | input_proc_exit(); |
1da177e4 | 1300 | unregister_chrdev(INPUT_MAJOR, "input"); |
ea9f240b | 1301 | class_unregister(&input_class); |
1da177e4 LT |
1302 | } |
1303 | ||
1304 | subsys_initcall(input_init); | |
1305 | module_exit(input_exit); |