Commit | Line | Data |
---|---|---|
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/poll.h> |
21 | #include <linux/device.h> | |
e676c232 | 22 | #include <linux/mutex.h> |
8006479c | 23 | #include <linux/rcupdate.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 | ||
8006479c DT |
34 | /* |
35 | * input_mutex protects access to both input_dev_list and input_handler_list. | |
36 | * This also causes input_[un]register_device and input_[un]register_handler | |
37 | * be mutually exclusive which simplifies locking in drivers implementing | |
38 | * input handlers. | |
39 | */ | |
40 | static DEFINE_MUTEX(input_mutex); | |
41 | ||
1da177e4 LT |
42 | static struct input_handler *input_table[8]; |
43 | ||
8006479c DT |
44 | static inline int is_event_supported(unsigned int code, |
45 | unsigned long *bm, unsigned int max) | |
1da177e4 | 46 | { |
8006479c DT |
47 | return code <= max && test_bit(code, bm); |
48 | } | |
1da177e4 | 49 | |
8006479c DT |
50 | static int input_defuzz_abs_event(int value, int old_val, int fuzz) |
51 | { | |
52 | if (fuzz) { | |
53 | if (value > old_val - fuzz / 2 && value < old_val + fuzz / 2) | |
54 | return old_val; | |
1da177e4 | 55 | |
8006479c DT |
56 | if (value > old_val - fuzz && value < old_val + fuzz) |
57 | return (old_val * 3 + value) / 4; | |
1da177e4 | 58 | |
8006479c DT |
59 | if (value > old_val - fuzz * 2 && value < old_val + fuzz * 2) |
60 | return (old_val + value) / 2; | |
61 | } | |
1da177e4 | 62 | |
8006479c DT |
63 | return value; |
64 | } | |
1da177e4 | 65 | |
8006479c DT |
66 | /* |
67 | * Pass event through all open handles. This function is called with | |
82ba56c2 | 68 | * dev->event_lock held and interrupts disabled. |
8006479c DT |
69 | */ |
70 | static void input_pass_event(struct input_dev *dev, | |
71 | unsigned int type, unsigned int code, int value) | |
72 | { | |
82ba56c2 DT |
73 | struct input_handle *handle; |
74 | ||
75 | rcu_read_lock(); | |
1da177e4 | 76 | |
82ba56c2 | 77 | handle = rcu_dereference(dev->grab); |
8006479c DT |
78 | if (handle) |
79 | handle->handler->event(handle, type, code, value); | |
80 | else | |
81 | list_for_each_entry_rcu(handle, &dev->h_list, d_node) | |
82 | if (handle->open) | |
83 | handle->handler->event(handle, | |
84 | type, code, value); | |
82ba56c2 | 85 | rcu_read_unlock(); |
8006479c | 86 | } |
1da177e4 | 87 | |
8006479c DT |
88 | /* |
89 | * Generate software autorepeat event. Note that we take | |
90 | * dev->event_lock here to avoid racing with input_event | |
91 | * which may cause keys get "stuck". | |
92 | */ | |
93 | static void input_repeat_key(unsigned long data) | |
94 | { | |
95 | struct input_dev *dev = (void *) data; | |
96 | unsigned long flags; | |
1da177e4 | 97 | |
8006479c | 98 | spin_lock_irqsave(&dev->event_lock, flags); |
1da177e4 | 99 | |
8006479c DT |
100 | if (test_bit(dev->repeat_key, dev->key) && |
101 | is_event_supported(dev->repeat_key, dev->keybit, KEY_MAX)) { | |
1da177e4 | 102 | |
8006479c | 103 | input_pass_event(dev, EV_KEY, dev->repeat_key, 2); |
1da177e4 | 104 | |
8006479c DT |
105 | if (dev->sync) { |
106 | /* | |
107 | * Only send SYN_REPORT if we are not in a middle | |
108 | * of driver parsing a new hardware packet. | |
109 | * Otherwise assume that the driver will send | |
110 | * SYN_REPORT once it's done. | |
111 | */ | |
112 | input_pass_event(dev, EV_SYN, SYN_REPORT, 1); | |
113 | } | |
31581066 | 114 | |
8006479c DT |
115 | if (dev->rep[REP_PERIOD]) |
116 | mod_timer(&dev->timer, jiffies + | |
117 | msecs_to_jiffies(dev->rep[REP_PERIOD])); | |
118 | } | |
31581066 | 119 | |
8006479c DT |
120 | spin_unlock_irqrestore(&dev->event_lock, flags); |
121 | } | |
31581066 | 122 | |
8006479c DT |
123 | static void input_start_autorepeat(struct input_dev *dev, int code) |
124 | { | |
125 | if (test_bit(EV_REP, dev->evbit) && | |
126 | dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && | |
127 | dev->timer.data) { | |
128 | dev->repeat_key = code; | |
129 | mod_timer(&dev->timer, | |
130 | jiffies + msecs_to_jiffies(dev->rep[REP_DELAY])); | |
131 | } | |
132 | } | |
31581066 | 133 | |
8006479c DT |
134 | #define INPUT_IGNORE_EVENT 0 |
135 | #define INPUT_PASS_TO_HANDLERS 1 | |
136 | #define INPUT_PASS_TO_DEVICE 2 | |
137 | #define INPUT_PASS_TO_ALL (INPUT_PASS_TO_HANDLERS | INPUT_PASS_TO_DEVICE) | |
1da177e4 | 138 | |
8006479c DT |
139 | static void input_handle_event(struct input_dev *dev, |
140 | unsigned int type, unsigned int code, int value) | |
141 | { | |
142 | int disposition = INPUT_IGNORE_EVENT; | |
1da177e4 | 143 | |
8006479c | 144 | switch (type) { |
1da177e4 | 145 | |
8006479c DT |
146 | case EV_SYN: |
147 | switch (code) { | |
148 | case SYN_CONFIG: | |
149 | disposition = INPUT_PASS_TO_ALL; | |
150 | break; | |
1da177e4 | 151 | |
8006479c DT |
152 | case SYN_REPORT: |
153 | if (!dev->sync) { | |
154 | dev->sync = 1; | |
155 | disposition = INPUT_PASS_TO_HANDLERS; | |
1da177e4 | 156 | } |
1da177e4 | 157 | break; |
8006479c DT |
158 | } |
159 | break; | |
1da177e4 | 160 | |
8006479c DT |
161 | case EV_KEY: |
162 | if (is_event_supported(code, dev->keybit, KEY_MAX) && | |
163 | !!test_bit(code, dev->key) != value) { | |
1da177e4 | 164 | |
8006479c DT |
165 | if (value != 2) { |
166 | __change_bit(code, dev->key); | |
167 | if (value) | |
168 | input_start_autorepeat(dev, code); | |
169 | } | |
1da177e4 | 170 | |
8006479c DT |
171 | disposition = INPUT_PASS_TO_HANDLERS; |
172 | } | |
173 | break; | |
1da177e4 | 174 | |
8006479c DT |
175 | case EV_SW: |
176 | if (is_event_supported(code, dev->swbit, SW_MAX) && | |
177 | !!test_bit(code, dev->sw) != value) { | |
1da177e4 | 178 | |
8006479c DT |
179 | __change_bit(code, dev->sw); |
180 | disposition = INPUT_PASS_TO_HANDLERS; | |
181 | } | |
182 | break; | |
1da177e4 | 183 | |
8006479c DT |
184 | case EV_ABS: |
185 | if (is_event_supported(code, dev->absbit, ABS_MAX)) { | |
1da177e4 | 186 | |
8006479c DT |
187 | value = input_defuzz_abs_event(value, |
188 | dev->abs[code], dev->absfuzz[code]); | |
1da177e4 | 189 | |
8006479c DT |
190 | if (dev->abs[code] != value) { |
191 | dev->abs[code] = value; | |
192 | disposition = INPUT_PASS_TO_HANDLERS; | |
193 | } | |
194 | } | |
195 | break; | |
1da177e4 | 196 | |
8006479c DT |
197 | case EV_REL: |
198 | if (is_event_supported(code, dev->relbit, REL_MAX) && value) | |
199 | disposition = INPUT_PASS_TO_HANDLERS; | |
1da177e4 | 200 | |
8006479c | 201 | break; |
1e0afb28 | 202 | |
8006479c DT |
203 | case EV_MSC: |
204 | if (is_event_supported(code, dev->mscbit, MSC_MAX)) | |
205 | disposition = INPUT_PASS_TO_ALL; | |
1da177e4 | 206 | |
8006479c | 207 | break; |
1da177e4 | 208 | |
8006479c DT |
209 | case EV_LED: |
210 | if (is_event_supported(code, dev->ledbit, LED_MAX) && | |
211 | !!test_bit(code, dev->led) != value) { | |
1da177e4 | 212 | |
8006479c DT |
213 | __change_bit(code, dev->led); |
214 | disposition = INPUT_PASS_TO_ALL; | |
215 | } | |
216 | break; | |
217 | ||
218 | case EV_SND: | |
219 | if (is_event_supported(code, dev->sndbit, SND_MAX)) { | |
1da177e4 | 220 | |
8fdc1948 | 221 | if (!!test_bit(code, dev->snd) != !!value) |
8006479c DT |
222 | __change_bit(code, dev->snd); |
223 | disposition = INPUT_PASS_TO_ALL; | |
224 | } | |
225 | break; | |
8fdc1948 | 226 | |
8006479c DT |
227 | case EV_REP: |
228 | if (code <= REP_MAX && value >= 0 && dev->rep[code] != value) { | |
229 | dev->rep[code] = value; | |
230 | disposition = INPUT_PASS_TO_ALL; | |
231 | } | |
232 | break; | |
1da177e4 | 233 | |
8006479c DT |
234 | case EV_FF: |
235 | if (value >= 0) | |
236 | disposition = INPUT_PASS_TO_ALL; | |
237 | break; | |
238 | } | |
1da177e4 | 239 | |
8006479c DT |
240 | if (type != EV_SYN) |
241 | dev->sync = 0; | |
1da177e4 | 242 | |
8006479c DT |
243 | if ((disposition & INPUT_PASS_TO_DEVICE) && dev->event) |
244 | dev->event(dev, type, code, value); | |
1da177e4 | 245 | |
8006479c DT |
246 | if (disposition & INPUT_PASS_TO_HANDLERS) |
247 | input_pass_event(dev, type, code, value); | |
248 | } | |
1da177e4 | 249 | |
8006479c DT |
250 | /** |
251 | * input_event() - report new input event | |
252 | * @dev: device that generated the event | |
253 | * @type: type of the event | |
254 | * @code: event code | |
255 | * @value: value of the event | |
256 | * | |
257 | * This function should be used by drivers implementing various input | |
258 | * devices. See also input_inject_event(). | |
259 | */ | |
1da177e4 | 260 | |
8006479c DT |
261 | void input_event(struct input_dev *dev, |
262 | unsigned int type, unsigned int code, int value) | |
263 | { | |
264 | unsigned long flags; | |
509ca1a9 | 265 | |
8006479c | 266 | if (is_event_supported(type, dev->evbit, EV_MAX)) { |
509ca1a9 | 267 | |
8006479c DT |
268 | spin_lock_irqsave(&dev->event_lock, flags); |
269 | add_input_randomness(type, code, value); | |
270 | input_handle_event(dev, type, code, value); | |
271 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
1da177e4 | 272 | } |
1da177e4 | 273 | } |
ca56fe07 | 274 | EXPORT_SYMBOL(input_event); |
1da177e4 | 275 | |
0e739d28 DT |
276 | /** |
277 | * input_inject_event() - send input event from input handler | |
278 | * @handle: input handle to send event through | |
279 | * @type: type of the event | |
280 | * @code: event code | |
281 | * @value: value of the event | |
282 | * | |
8006479c DT |
283 | * Similar to input_event() but will ignore event if device is |
284 | * "grabbed" and handle injecting event is not the one that owns | |
285 | * the device. | |
0e739d28 | 286 | */ |
8006479c DT |
287 | void input_inject_event(struct input_handle *handle, |
288 | unsigned int type, unsigned int code, int value) | |
1da177e4 | 289 | { |
8006479c DT |
290 | struct input_dev *dev = handle->dev; |
291 | struct input_handle *grab; | |
292 | unsigned long flags; | |
1da177e4 | 293 | |
8006479c DT |
294 | if (is_event_supported(type, dev->evbit, EV_MAX)) { |
295 | spin_lock_irqsave(&dev->event_lock, flags); | |
1da177e4 | 296 | |
82ba56c2 | 297 | rcu_read_lock(); |
8006479c DT |
298 | grab = rcu_dereference(dev->grab); |
299 | if (!grab || grab == handle) | |
300 | input_handle_event(dev, type, code, value); | |
82ba56c2 | 301 | rcu_read_unlock(); |
1da177e4 | 302 | |
8006479c DT |
303 | spin_unlock_irqrestore(&dev->event_lock, flags); |
304 | } | |
1da177e4 | 305 | } |
8006479c | 306 | EXPORT_SYMBOL(input_inject_event); |
1da177e4 | 307 | |
8006479c DT |
308 | /** |
309 | * input_grab_device - grabs device for exclusive use | |
310 | * @handle: input handle that wants to own the device | |
311 | * | |
312 | * When a device is grabbed by an input handle all events generated by | |
313 | * the device are delivered only to this handle. Also events injected | |
314 | * by other input handles are ignored while device is grabbed. | |
315 | */ | |
1da177e4 LT |
316 | int input_grab_device(struct input_handle *handle) |
317 | { | |
8006479c DT |
318 | struct input_dev *dev = handle->dev; |
319 | int retval; | |
1da177e4 | 320 | |
8006479c DT |
321 | retval = mutex_lock_interruptible(&dev->mutex); |
322 | if (retval) | |
323 | return retval; | |
324 | ||
325 | if (dev->grab) { | |
326 | retval = -EBUSY; | |
327 | goto out; | |
328 | } | |
329 | ||
330 | rcu_assign_pointer(dev->grab, handle); | |
82ba56c2 | 331 | synchronize_rcu(); |
8006479c DT |
332 | |
333 | out: | |
334 | mutex_unlock(&dev->mutex); | |
335 | return retval; | |
1da177e4 | 336 | } |
ca56fe07 | 337 | EXPORT_SYMBOL(input_grab_device); |
1da177e4 | 338 | |
8006479c | 339 | static void __input_release_device(struct input_handle *handle) |
1da177e4 | 340 | { |
a2b2ed2c | 341 | struct input_dev *dev = handle->dev; |
c7e8dc6e | 342 | |
a2b2ed2c | 343 | if (dev->grab == handle) { |
8006479c DT |
344 | rcu_assign_pointer(dev->grab, NULL); |
345 | /* Make sure input_pass_event() notices that grab is gone */ | |
82ba56c2 | 346 | synchronize_rcu(); |
a2b2ed2c AM |
347 | |
348 | list_for_each_entry(handle, &dev->h_list, d_node) | |
8006479c | 349 | if (handle->open && handle->handler->start) |
c7e8dc6e DT |
350 | handle->handler->start(handle); |
351 | } | |
1da177e4 | 352 | } |
8006479c DT |
353 | |
354 | /** | |
355 | * input_release_device - release previously grabbed device | |
356 | * @handle: input handle that owns the device | |
357 | * | |
358 | * Releases previously grabbed device so that other input handles can | |
359 | * start receiving input events. Upon release all handlers attached | |
360 | * to the device have their start() method called so they have a change | |
361 | * to synchronize device state with the rest of the system. | |
362 | */ | |
363 | void input_release_device(struct input_handle *handle) | |
364 | { | |
365 | struct input_dev *dev = handle->dev; | |
366 | ||
367 | mutex_lock(&dev->mutex); | |
368 | __input_release_device(handle); | |
369 | mutex_unlock(&dev->mutex); | |
370 | } | |
ca56fe07 | 371 | EXPORT_SYMBOL(input_release_device); |
1da177e4 | 372 | |
8006479c DT |
373 | /** |
374 | * input_open_device - open input device | |
375 | * @handle: handle through which device is being accessed | |
376 | * | |
377 | * This function should be called by input handlers when they | |
378 | * want to start receive events from given input device. | |
379 | */ | |
1da177e4 LT |
380 | int input_open_device(struct input_handle *handle) |
381 | { | |
0fbf87ca | 382 | struct input_dev *dev = handle->dev; |
8006479c | 383 | int retval; |
0fbf87ca | 384 | |
8006479c DT |
385 | retval = mutex_lock_interruptible(&dev->mutex); |
386 | if (retval) | |
387 | return retval; | |
388 | ||
389 | if (dev->going_away) { | |
390 | retval = -ENODEV; | |
391 | goto out; | |
392 | } | |
0fbf87ca | 393 | |
1da177e4 | 394 | handle->open++; |
0fbf87ca DT |
395 | |
396 | if (!dev->users++ && dev->open) | |
8006479c DT |
397 | retval = dev->open(dev); |
398 | ||
399 | if (retval) { | |
400 | dev->users--; | |
401 | if (!--handle->open) { | |
402 | /* | |
403 | * Make sure we are not delivering any more events | |
404 | * through this handle | |
405 | */ | |
82ba56c2 | 406 | synchronize_rcu(); |
8006479c DT |
407 | } |
408 | } | |
0fbf87ca | 409 | |
8006479c | 410 | out: |
e676c232 | 411 | mutex_unlock(&dev->mutex); |
8006479c | 412 | return retval; |
1da177e4 | 413 | } |
ca56fe07 | 414 | EXPORT_SYMBOL(input_open_device); |
1da177e4 | 415 | |
8006479c | 416 | int input_flush_device(struct input_handle *handle, struct file *file) |
1da177e4 | 417 | { |
8006479c DT |
418 | struct input_dev *dev = handle->dev; |
419 | int retval; | |
1da177e4 | 420 | |
8006479c DT |
421 | retval = mutex_lock_interruptible(&dev->mutex); |
422 | if (retval) | |
423 | return retval; | |
424 | ||
425 | if (dev->flush) | |
426 | retval = dev->flush(dev, file); | |
427 | ||
428 | mutex_unlock(&dev->mutex); | |
429 | return retval; | |
1da177e4 | 430 | } |
ca56fe07 | 431 | EXPORT_SYMBOL(input_flush_device); |
1da177e4 | 432 | |
8006479c DT |
433 | /** |
434 | * input_close_device - close input device | |
435 | * @handle: handle through which device is being accessed | |
436 | * | |
437 | * This function should be called by input handlers when they | |
438 | * want to stop receive events from given input device. | |
439 | */ | |
1da177e4 LT |
440 | void input_close_device(struct input_handle *handle) |
441 | { | |
0fbf87ca DT |
442 | struct input_dev *dev = handle->dev; |
443 | ||
e676c232 | 444 | mutex_lock(&dev->mutex); |
0fbf87ca | 445 | |
8006479c DT |
446 | __input_release_device(handle); |
447 | ||
0fbf87ca DT |
448 | if (!--dev->users && dev->close) |
449 | dev->close(dev); | |
8006479c DT |
450 | |
451 | if (!--handle->open) { | |
452 | /* | |
82ba56c2 | 453 | * synchronize_rcu() makes sure that input_pass_event() |
8006479c DT |
454 | * completed and that no more input events are delivered |
455 | * through this handle | |
456 | */ | |
82ba56c2 | 457 | synchronize_rcu(); |
8006479c | 458 | } |
0fbf87ca | 459 | |
e676c232 | 460 | mutex_unlock(&dev->mutex); |
1da177e4 | 461 | } |
ca56fe07 | 462 | EXPORT_SYMBOL(input_close_device); |
1da177e4 | 463 | |
8006479c DT |
464 | /* |
465 | * Prepare device for unregistering | |
466 | */ | |
467 | static void input_disconnect_device(struct input_dev *dev) | |
468 | { | |
469 | struct input_handle *handle; | |
470 | int code; | |
471 | ||
472 | /* | |
473 | * Mark device as going away. Note that we take dev->mutex here | |
474 | * not to protect access to dev->going_away but rather to ensure | |
475 | * that there are no threads in the middle of input_open_device() | |
476 | */ | |
477 | mutex_lock(&dev->mutex); | |
478 | dev->going_away = 1; | |
479 | mutex_unlock(&dev->mutex); | |
480 | ||
481 | spin_lock_irq(&dev->event_lock); | |
482 | ||
483 | /* | |
484 | * Simulate keyup events for all pressed keys so that handlers | |
485 | * are not left with "stuck" keys. The driver may continue | |
486 | * generate events even after we done here but they will not | |
487 | * reach any handlers. | |
488 | */ | |
489 | if (is_event_supported(EV_KEY, dev->evbit, EV_MAX)) { | |
490 | for (code = 0; code <= KEY_MAX; code++) { | |
491 | if (is_event_supported(code, dev->keybit, KEY_MAX) && | |
492 | test_bit(code, dev->key)) { | |
493 | input_pass_event(dev, EV_KEY, code, 0); | |
494 | } | |
495 | } | |
496 | input_pass_event(dev, EV_SYN, SYN_REPORT, 1); | |
497 | } | |
498 | ||
499 | list_for_each_entry(handle, &dev->h_list, d_node) | |
500 | handle->open = 0; | |
501 | ||
502 | spin_unlock_irq(&dev->event_lock); | |
503 | } | |
504 | ||
c8e4c772 MR |
505 | static int input_fetch_keycode(struct input_dev *dev, int scancode) |
506 | { | |
507 | switch (dev->keycodesize) { | |
508 | case 1: | |
509 | return ((u8 *)dev->keycode)[scancode]; | |
510 | ||
511 | case 2: | |
512 | return ((u16 *)dev->keycode)[scancode]; | |
513 | ||
514 | default: | |
515 | return ((u32 *)dev->keycode)[scancode]; | |
516 | } | |
517 | } | |
518 | ||
519 | static int input_default_getkeycode(struct input_dev *dev, | |
520 | int scancode, int *keycode) | |
521 | { | |
522 | if (!dev->keycodesize) | |
523 | return -EINVAL; | |
524 | ||
525 | if (scancode < 0 || scancode >= dev->keycodemax) | |
526 | return -EINVAL; | |
527 | ||
528 | *keycode = input_fetch_keycode(dev, scancode); | |
529 | ||
530 | return 0; | |
531 | } | |
532 | ||
533 | static int input_default_setkeycode(struct input_dev *dev, | |
534 | int scancode, int keycode) | |
535 | { | |
536 | int old_keycode; | |
537 | int i; | |
538 | ||
539 | if (scancode < 0 || scancode >= dev->keycodemax) | |
540 | return -EINVAL; | |
541 | ||
542 | if (keycode < 0 || keycode > KEY_MAX) | |
543 | return -EINVAL; | |
544 | ||
545 | if (!dev->keycodesize) | |
546 | return -EINVAL; | |
547 | ||
548 | if (dev->keycodesize < sizeof(keycode) && (keycode >> (dev->keycodesize * 8))) | |
549 | return -EINVAL; | |
550 | ||
551 | switch (dev->keycodesize) { | |
552 | case 1: { | |
553 | u8 *k = (u8 *)dev->keycode; | |
554 | old_keycode = k[scancode]; | |
555 | k[scancode] = keycode; | |
556 | break; | |
557 | } | |
558 | case 2: { | |
559 | u16 *k = (u16 *)dev->keycode; | |
560 | old_keycode = k[scancode]; | |
561 | k[scancode] = keycode; | |
562 | break; | |
563 | } | |
564 | default: { | |
565 | u32 *k = (u32 *)dev->keycode; | |
566 | old_keycode = k[scancode]; | |
567 | k[scancode] = keycode; | |
568 | break; | |
569 | } | |
570 | } | |
571 | ||
572 | clear_bit(old_keycode, dev->keybit); | |
573 | set_bit(keycode, dev->keybit); | |
574 | ||
575 | for (i = 0; i < dev->keycodemax; i++) { | |
576 | if (input_fetch_keycode(dev, i) == old_keycode) { | |
577 | set_bit(old_keycode, dev->keybit); | |
578 | break; /* Setting the bit twice is useless, so break */ | |
579 | } | |
580 | } | |
581 | ||
582 | return 0; | |
583 | } | |
584 | ||
585 | ||
1da177e4 LT |
586 | #define MATCH_BIT(bit, max) \ |
587 | for (i = 0; i < NBITS(max); i++) \ | |
588 | if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \ | |
589 | break; \ | |
590 | if (i != NBITS(max)) \ | |
591 | continue; | |
592 | ||
66e66118 DT |
593 | static const struct input_device_id *input_match_device(const struct input_device_id *id, |
594 | struct input_dev *dev) | |
1da177e4 LT |
595 | { |
596 | int i; | |
597 | ||
598 | for (; id->flags || id->driver_info; id++) { | |
599 | ||
600 | if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) | |
ddc5d341 | 601 | if (id->bustype != dev->id.bustype) |
1da177e4 LT |
602 | continue; |
603 | ||
604 | if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) | |
ddc5d341 | 605 | if (id->vendor != dev->id.vendor) |
1da177e4 LT |
606 | continue; |
607 | ||
608 | if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) | |
ddc5d341 | 609 | if (id->product != dev->id.product) |
1da177e4 LT |
610 | continue; |
611 | ||
612 | if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) | |
ddc5d341 | 613 | if (id->version != dev->id.version) |
1da177e4 LT |
614 | continue; |
615 | ||
616 | MATCH_BIT(evbit, EV_MAX); | |
617 | MATCH_BIT(keybit, KEY_MAX); | |
618 | MATCH_BIT(relbit, REL_MAX); | |
619 | MATCH_BIT(absbit, ABS_MAX); | |
620 | MATCH_BIT(mscbit, MSC_MAX); | |
621 | MATCH_BIT(ledbit, LED_MAX); | |
622 | MATCH_BIT(sndbit, SND_MAX); | |
623 | MATCH_BIT(ffbit, FF_MAX); | |
ff13f98b | 624 | MATCH_BIT(swbit, SW_MAX); |
1da177e4 LT |
625 | |
626 | return id; | |
627 | } | |
628 | ||
629 | return NULL; | |
630 | } | |
631 | ||
5b2a0826 DT |
632 | static int input_attach_handler(struct input_dev *dev, struct input_handler *handler) |
633 | { | |
634 | const struct input_device_id *id; | |
635 | int error; | |
636 | ||
637 | if (handler->blacklist && input_match_device(handler->blacklist, dev)) | |
638 | return -ENODEV; | |
639 | ||
640 | id = input_match_device(handler->id_table, dev); | |
641 | if (!id) | |
642 | return -ENODEV; | |
643 | ||
644 | error = handler->connect(handler, dev, id); | |
645 | if (error && error != -ENODEV) | |
646 | printk(KERN_ERR | |
647 | "input: failed to attach handler %s to device %s, " | |
648 | "error: %d\n", | |
9657d75c | 649 | handler->name, kobject_name(&dev->dev.kobj), error); |
5b2a0826 DT |
650 | |
651 | return error; | |
652 | } | |
653 | ||
654 | ||
f96b434d DT |
655 | #ifdef CONFIG_PROC_FS |
656 | ||
657 | static struct proc_dir_entry *proc_bus_input_dir; | |
658 | static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait); | |
659 | static int input_devices_state; | |
660 | ||
661 | static inline void input_wakeup_procfs_readers(void) | |
662 | { | |
663 | input_devices_state++; | |
664 | wake_up(&input_devices_poll_wait); | |
665 | } | |
666 | ||
969b21cd | 667 | static unsigned int input_proc_devices_poll(struct file *file, poll_table *wait) |
f96b434d DT |
668 | { |
669 | int state = input_devices_state; | |
1e0afb28 | 670 | |
f96b434d DT |
671 | poll_wait(file, &input_devices_poll_wait, wait); |
672 | if (state != input_devices_state) | |
673 | return POLLIN | POLLRDNORM; | |
1e0afb28 | 674 | |
f96b434d DT |
675 | return 0; |
676 | } | |
677 | ||
969b21cd DT |
678 | static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos) |
679 | { | |
8006479c DT |
680 | if (mutex_lock_interruptible(&input_mutex)) |
681 | return NULL; | |
f96b434d | 682 | |
ad5d972c | 683 | return seq_list_start(&input_dev_list, *pos); |
969b21cd | 684 | } |
051b2fea | 685 | |
969b21cd DT |
686 | static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
687 | { | |
ad5d972c | 688 | return seq_list_next(v, &input_dev_list, pos); |
969b21cd | 689 | } |
f96b434d | 690 | |
969b21cd DT |
691 | static void input_devices_seq_stop(struct seq_file *seq, void *v) |
692 | { | |
8006479c | 693 | mutex_unlock(&input_mutex); |
969b21cd | 694 | } |
f96b434d | 695 | |
969b21cd DT |
696 | static void input_seq_print_bitmap(struct seq_file *seq, const char *name, |
697 | unsigned long *bitmap, int max) | |
698 | { | |
699 | int i; | |
051b2fea | 700 | |
969b21cd DT |
701 | for (i = NBITS(max) - 1; i > 0; i--) |
702 | if (bitmap[i]) | |
703 | break; | |
f96b434d | 704 | |
969b21cd DT |
705 | seq_printf(seq, "B: %s=", name); |
706 | for (; i >= 0; i--) | |
707 | seq_printf(seq, "%lx%s", bitmap[i], i > 0 ? " " : ""); | |
708 | seq_putc(seq, '\n'); | |
709 | } | |
f96b434d | 710 | |
969b21cd DT |
711 | static int input_devices_seq_show(struct seq_file *seq, void *v) |
712 | { | |
713 | struct input_dev *dev = container_of(v, struct input_dev, node); | |
9657d75c | 714 | const char *path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
969b21cd DT |
715 | struct input_handle *handle; |
716 | ||
717 | seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n", | |
718 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); | |
719 | ||
720 | seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); | |
721 | seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : ""); | |
722 | seq_printf(seq, "S: Sysfs=%s\n", path ? path : ""); | |
15e03ae8 | 723 | seq_printf(seq, "U: Uniq=%s\n", dev->uniq ? dev->uniq : ""); |
969b21cd DT |
724 | seq_printf(seq, "H: Handlers="); |
725 | ||
726 | list_for_each_entry(handle, &dev->h_list, d_node) | |
727 | seq_printf(seq, "%s ", handle->name); | |
728 | seq_putc(seq, '\n'); | |
729 | ||
730 | input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX); | |
731 | if (test_bit(EV_KEY, dev->evbit)) | |
732 | input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX); | |
733 | if (test_bit(EV_REL, dev->evbit)) | |
734 | input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX); | |
735 | if (test_bit(EV_ABS, dev->evbit)) | |
736 | input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX); | |
737 | if (test_bit(EV_MSC, dev->evbit)) | |
738 | input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX); | |
739 | if (test_bit(EV_LED, dev->evbit)) | |
740 | input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX); | |
741 | if (test_bit(EV_SND, dev->evbit)) | |
742 | input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX); | |
743 | if (test_bit(EV_FF, dev->evbit)) | |
744 | input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX); | |
745 | if (test_bit(EV_SW, dev->evbit)) | |
746 | input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX); | |
747 | ||
748 | seq_putc(seq, '\n'); | |
749 | ||
750 | kfree(path); | |
751 | return 0; | |
f96b434d DT |
752 | } |
753 | ||
969b21cd DT |
754 | static struct seq_operations input_devices_seq_ops = { |
755 | .start = input_devices_seq_start, | |
756 | .next = input_devices_seq_next, | |
757 | .stop = input_devices_seq_stop, | |
758 | .show = input_devices_seq_show, | |
759 | }; | |
760 | ||
761 | static int input_proc_devices_open(struct inode *inode, struct file *file) | |
f96b434d | 762 | { |
969b21cd DT |
763 | return seq_open(file, &input_devices_seq_ops); |
764 | } | |
765 | ||
2b8693c0 | 766 | static const struct file_operations input_devices_fileops = { |
969b21cd DT |
767 | .owner = THIS_MODULE, |
768 | .open = input_proc_devices_open, | |
769 | .poll = input_proc_devices_poll, | |
770 | .read = seq_read, | |
771 | .llseek = seq_lseek, | |
772 | .release = seq_release, | |
773 | }; | |
774 | ||
775 | static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos) | |
776 | { | |
8006479c DT |
777 | if (mutex_lock_interruptible(&input_mutex)) |
778 | return NULL; | |
779 | ||
969b21cd | 780 | seq->private = (void *)(unsigned long)*pos; |
ad5d972c | 781 | return seq_list_start(&input_handler_list, *pos); |
969b21cd | 782 | } |
f96b434d | 783 | |
969b21cd DT |
784 | static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
785 | { | |
786 | seq->private = (void *)(unsigned long)(*pos + 1); | |
ad5d972c | 787 | return seq_list_next(v, &input_handler_list, pos); |
f96b434d DT |
788 | } |
789 | ||
969b21cd DT |
790 | static void input_handlers_seq_stop(struct seq_file *seq, void *v) |
791 | { | |
8006479c | 792 | mutex_unlock(&input_mutex); |
969b21cd DT |
793 | } |
794 | ||
795 | static int input_handlers_seq_show(struct seq_file *seq, void *v) | |
796 | { | |
797 | struct input_handler *handler = container_of(v, struct input_handler, node); | |
798 | ||
799 | seq_printf(seq, "N: Number=%ld Name=%s", | |
800 | (unsigned long)seq->private, handler->name); | |
801 | if (handler->fops) | |
802 | seq_printf(seq, " Minor=%d", handler->minor); | |
803 | seq_putc(seq, '\n'); | |
804 | ||
805 | return 0; | |
806 | } | |
807 | static struct seq_operations input_handlers_seq_ops = { | |
808 | .start = input_handlers_seq_start, | |
809 | .next = input_handlers_seq_next, | |
810 | .stop = input_handlers_seq_stop, | |
811 | .show = input_handlers_seq_show, | |
812 | }; | |
813 | ||
814 | static int input_proc_handlers_open(struct inode *inode, struct file *file) | |
815 | { | |
816 | return seq_open(file, &input_handlers_seq_ops); | |
817 | } | |
818 | ||
2b8693c0 | 819 | static const struct file_operations input_handlers_fileops = { |
969b21cd DT |
820 | .owner = THIS_MODULE, |
821 | .open = input_proc_handlers_open, | |
822 | .read = seq_read, | |
823 | .llseek = seq_lseek, | |
824 | .release = seq_release, | |
825 | }; | |
f96b434d DT |
826 | |
827 | static int __init input_proc_init(void) | |
828 | { | |
829 | struct proc_dir_entry *entry; | |
830 | ||
831 | proc_bus_input_dir = proc_mkdir("input", proc_bus); | |
832 | if (!proc_bus_input_dir) | |
833 | return -ENOMEM; | |
834 | ||
835 | proc_bus_input_dir->owner = THIS_MODULE; | |
836 | ||
969b21cd | 837 | entry = create_proc_entry("devices", 0, proc_bus_input_dir); |
f96b434d DT |
838 | if (!entry) |
839 | goto fail1; | |
840 | ||
841 | entry->owner = THIS_MODULE; | |
969b21cd | 842 | entry->proc_fops = &input_devices_fileops; |
f96b434d | 843 | |
969b21cd | 844 | entry = create_proc_entry("handlers", 0, proc_bus_input_dir); |
f96b434d DT |
845 | if (!entry) |
846 | goto fail2; | |
847 | ||
848 | entry->owner = THIS_MODULE; | |
969b21cd | 849 | entry->proc_fops = &input_handlers_fileops; |
f96b434d DT |
850 | |
851 | return 0; | |
852 | ||
853 | fail2: remove_proc_entry("devices", proc_bus_input_dir); | |
854 | fail1: remove_proc_entry("input", proc_bus); | |
855 | return -ENOMEM; | |
856 | } | |
857 | ||
beffbdc2 | 858 | static void input_proc_exit(void) |
f96b434d DT |
859 | { |
860 | remove_proc_entry("devices", proc_bus_input_dir); | |
861 | remove_proc_entry("handlers", proc_bus_input_dir); | |
862 | remove_proc_entry("input", proc_bus); | |
863 | } | |
864 | ||
865 | #else /* !CONFIG_PROC_FS */ | |
866 | static inline void input_wakeup_procfs_readers(void) { } | |
867 | static inline int input_proc_init(void) { return 0; } | |
868 | static inline void input_proc_exit(void) { } | |
869 | #endif | |
870 | ||
9657d75c DT |
871 | #define INPUT_DEV_STRING_ATTR_SHOW(name) \ |
872 | static ssize_t input_dev_show_##name(struct device *dev, \ | |
873 | struct device_attribute *attr, \ | |
874 | char *buf) \ | |
875 | { \ | |
876 | struct input_dev *input_dev = to_input_dev(dev); \ | |
877 | \ | |
878 | return scnprintf(buf, PAGE_SIZE, "%s\n", \ | |
879 | input_dev->name ? input_dev->name : ""); \ | |
880 | } \ | |
881 | static DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL) | |
5c1e9a6a DT |
882 | |
883 | INPUT_DEV_STRING_ATTR_SHOW(name); | |
884 | INPUT_DEV_STRING_ATTR_SHOW(phys); | |
885 | INPUT_DEV_STRING_ATTR_SHOW(uniq); | |
886 | ||
ac648a6a DT |
887 | static int input_print_modalias_bits(char *buf, int size, |
888 | char name, unsigned long *bm, | |
889 | unsigned int min_bit, unsigned int max_bit) | |
1d8f430c | 890 | { |
ac648a6a | 891 | int len = 0, i; |
1d8f430c | 892 | |
ac648a6a DT |
893 | len += snprintf(buf, max(size, 0), "%c", name); |
894 | for (i = min_bit; i < max_bit; i++) | |
895 | if (bm[LONG(i)] & BIT(i)) | |
896 | len += snprintf(buf + len, max(size - len, 0), "%X,", i); | |
1d8f430c RR |
897 | return len; |
898 | } | |
899 | ||
2db66876 DT |
900 | static int input_print_modalias(char *buf, int size, struct input_dev *id, |
901 | int add_cr) | |
1d8f430c | 902 | { |
bd37e5a9 | 903 | int len; |
1d8f430c | 904 | |
ac648a6a DT |
905 | len = snprintf(buf, max(size, 0), |
906 | "input:b%04Xv%04Xp%04Xe%04X-", | |
907 | id->id.bustype, id->id.vendor, | |
908 | id->id.product, id->id.version); | |
909 | ||
910 | len += input_print_modalias_bits(buf + len, size - len, | |
911 | 'e', id->evbit, 0, EV_MAX); | |
912 | len += input_print_modalias_bits(buf + len, size - len, | |
913 | 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX); | |
914 | len += input_print_modalias_bits(buf + len, size - len, | |
915 | 'r', id->relbit, 0, REL_MAX); | |
916 | len += input_print_modalias_bits(buf + len, size - len, | |
917 | 'a', id->absbit, 0, ABS_MAX); | |
918 | len += input_print_modalias_bits(buf + len, size - len, | |
919 | 'm', id->mscbit, 0, MSC_MAX); | |
920 | len += input_print_modalias_bits(buf + len, size - len, | |
921 | 'l', id->ledbit, 0, LED_MAX); | |
922 | len += input_print_modalias_bits(buf + len, size - len, | |
923 | 's', id->sndbit, 0, SND_MAX); | |
924 | len += input_print_modalias_bits(buf + len, size - len, | |
925 | 'f', id->ffbit, 0, FF_MAX); | |
926 | len += input_print_modalias_bits(buf + len, size - len, | |
927 | 'w', id->swbit, 0, SW_MAX); | |
2db66876 DT |
928 | |
929 | if (add_cr) | |
ac648a6a | 930 | len += snprintf(buf + len, max(size - len, 0), "\n"); |
2db66876 | 931 | |
bd37e5a9 KS |
932 | return len; |
933 | } | |
934 | ||
9657d75c DT |
935 | static ssize_t input_dev_show_modalias(struct device *dev, |
936 | struct device_attribute *attr, | |
937 | char *buf) | |
bd37e5a9 KS |
938 | { |
939 | struct input_dev *id = to_input_dev(dev); | |
940 | ssize_t len; | |
941 | ||
2db66876 DT |
942 | len = input_print_modalias(buf, PAGE_SIZE, id, 1); |
943 | ||
8a3cf456 | 944 | return min_t(int, len, PAGE_SIZE); |
1d8f430c | 945 | } |
9657d75c | 946 | static DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL); |
1d8f430c | 947 | |
629b77a4 | 948 | static struct attribute *input_dev_attrs[] = { |
9657d75c DT |
949 | &dev_attr_name.attr, |
950 | &dev_attr_phys.attr, | |
951 | &dev_attr_uniq.attr, | |
952 | &dev_attr_modalias.attr, | |
629b77a4 GKH |
953 | NULL |
954 | }; | |
955 | ||
bd0ef235 | 956 | static struct attribute_group input_dev_attr_group = { |
629b77a4 | 957 | .attrs = input_dev_attrs, |
5c1e9a6a DT |
958 | }; |
959 | ||
9657d75c DT |
960 | #define INPUT_DEV_ID_ATTR(name) \ |
961 | static ssize_t input_dev_show_id_##name(struct device *dev, \ | |
962 | struct device_attribute *attr, \ | |
963 | char *buf) \ | |
964 | { \ | |
965 | struct input_dev *input_dev = to_input_dev(dev); \ | |
966 | return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \ | |
967 | } \ | |
968 | static DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL) | |
5c1e9a6a DT |
969 | |
970 | INPUT_DEV_ID_ATTR(bustype); | |
971 | INPUT_DEV_ID_ATTR(vendor); | |
972 | INPUT_DEV_ID_ATTR(product); | |
973 | INPUT_DEV_ID_ATTR(version); | |
974 | ||
975 | static struct attribute *input_dev_id_attrs[] = { | |
9657d75c DT |
976 | &dev_attr_bustype.attr, |
977 | &dev_attr_vendor.attr, | |
978 | &dev_attr_product.attr, | |
979 | &dev_attr_version.attr, | |
5c1e9a6a DT |
980 | NULL |
981 | }; | |
982 | ||
983 | static struct attribute_group input_dev_id_attr_group = { | |
984 | .name = "id", | |
985 | .attrs = input_dev_id_attrs, | |
986 | }; | |
987 | ||
969b21cd DT |
988 | static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap, |
989 | int max, int add_cr) | |
990 | { | |
991 | int i; | |
992 | int len = 0; | |
993 | ||
994 | for (i = NBITS(max) - 1; i > 0; i--) | |
995 | if (bitmap[i]) | |
996 | break; | |
997 | ||
998 | for (; i >= 0; i--) | |
999 | len += snprintf(buf + len, max(buf_size - len, 0), | |
1000 | "%lx%s", bitmap[i], i > 0 ? " " : ""); | |
1001 | ||
1002 | if (add_cr) | |
1003 | len += snprintf(buf + len, max(buf_size - len, 0), "\n"); | |
1004 | ||
1005 | return len; | |
1006 | } | |
1007 | ||
9657d75c DT |
1008 | #define INPUT_DEV_CAP_ATTR(ev, bm) \ |
1009 | static ssize_t input_dev_show_cap_##bm(struct device *dev, \ | |
1010 | struct device_attribute *attr, \ | |
1011 | char *buf) \ | |
1012 | { \ | |
1013 | struct input_dev *input_dev = to_input_dev(dev); \ | |
1014 | int len = input_print_bitmap(buf, PAGE_SIZE, \ | |
1015 | input_dev->bm##bit, ev##_MAX, 1); \ | |
1016 | return min_t(int, len, PAGE_SIZE); \ | |
1017 | } \ | |
1018 | static DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL) | |
5c1e9a6a DT |
1019 | |
1020 | INPUT_DEV_CAP_ATTR(EV, ev); | |
1021 | INPUT_DEV_CAP_ATTR(KEY, key); | |
1022 | INPUT_DEV_CAP_ATTR(REL, rel); | |
1023 | INPUT_DEV_CAP_ATTR(ABS, abs); | |
1024 | INPUT_DEV_CAP_ATTR(MSC, msc); | |
1025 | INPUT_DEV_CAP_ATTR(LED, led); | |
1026 | INPUT_DEV_CAP_ATTR(SND, snd); | |
1027 | INPUT_DEV_CAP_ATTR(FF, ff); | |
1028 | INPUT_DEV_CAP_ATTR(SW, sw); | |
1029 | ||
1030 | static struct attribute *input_dev_caps_attrs[] = { | |
9657d75c DT |
1031 | &dev_attr_ev.attr, |
1032 | &dev_attr_key.attr, | |
1033 | &dev_attr_rel.attr, | |
1034 | &dev_attr_abs.attr, | |
1035 | &dev_attr_msc.attr, | |
1036 | &dev_attr_led.attr, | |
1037 | &dev_attr_snd.attr, | |
1038 | &dev_attr_ff.attr, | |
1039 | &dev_attr_sw.attr, | |
5c1e9a6a DT |
1040 | NULL |
1041 | }; | |
1042 | ||
1043 | static struct attribute_group input_dev_caps_attr_group = { | |
1044 | .name = "capabilities", | |
1045 | .attrs = input_dev_caps_attrs, | |
1046 | }; | |
1047 | ||
cb9def4d DT |
1048 | static struct attribute_group *input_dev_attr_groups[] = { |
1049 | &input_dev_attr_group, | |
1050 | &input_dev_id_attr_group, | |
1051 | &input_dev_caps_attr_group, | |
1052 | NULL | |
1053 | }; | |
1054 | ||
9657d75c | 1055 | static void input_dev_release(struct device *device) |
d19fbe8a | 1056 | { |
9657d75c | 1057 | struct input_dev *dev = to_input_dev(device); |
d19fbe8a | 1058 | |
509ca1a9 | 1059 | input_ff_destroy(dev); |
d19fbe8a | 1060 | kfree(dev); |
509ca1a9 | 1061 | |
d19fbe8a DT |
1062 | module_put(THIS_MODULE); |
1063 | } | |
1064 | ||
a7fadbe1 | 1065 | /* |
312c004d | 1066 | * Input uevent interface - loading event handlers based on |
a7fadbe1 DT |
1067 | * device bitfields. |
1068 | */ | |
7eff2e7a | 1069 | static int input_add_uevent_bm_var(struct kobj_uevent_env *env, |
ac648a6a | 1070 | const char *name, unsigned long *bitmap, int max) |
a7fadbe1 | 1071 | { |
7eff2e7a | 1072 | int len; |
a7fadbe1 | 1073 | |
7eff2e7a | 1074 | if (add_uevent_var(env, "%s=", name)) |
a7fadbe1 DT |
1075 | return -ENOMEM; |
1076 | ||
7eff2e7a KS |
1077 | len = input_print_bitmap(&env->buf[env->buflen - 1], |
1078 | sizeof(env->buf) - env->buflen, | |
1079 | bitmap, max, 0); | |
1080 | if (len >= (sizeof(env->buf) - env->buflen)) | |
a7fadbe1 DT |
1081 | return -ENOMEM; |
1082 | ||
7eff2e7a | 1083 | env->buflen += len; |
a7fadbe1 DT |
1084 | return 0; |
1085 | } | |
1086 | ||
7eff2e7a | 1087 | static int input_add_uevent_modalias_var(struct kobj_uevent_env *env, |
ac648a6a DT |
1088 | struct input_dev *dev) |
1089 | { | |
7eff2e7a | 1090 | int len; |
ac648a6a | 1091 | |
7eff2e7a | 1092 | if (add_uevent_var(env, "MODALIAS=")) |
ac648a6a DT |
1093 | return -ENOMEM; |
1094 | ||
7eff2e7a KS |
1095 | len = input_print_modalias(&env->buf[env->buflen - 1], |
1096 | sizeof(env->buf) - env->buflen, | |
1097 | dev, 0); | |
1098 | if (len >= (sizeof(env->buf) - env->buflen)) | |
ac648a6a DT |
1099 | return -ENOMEM; |
1100 | ||
7eff2e7a | 1101 | env->buflen += len; |
ac648a6a DT |
1102 | return 0; |
1103 | } | |
1104 | ||
a7fadbe1 DT |
1105 | #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \ |
1106 | do { \ | |
7eff2e7a | 1107 | int err = add_uevent_var(env, fmt, val); \ |
a7fadbe1 DT |
1108 | if (err) \ |
1109 | return err; \ | |
1110 | } while (0) | |
1111 | ||
1112 | #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \ | |
1113 | do { \ | |
7eff2e7a | 1114 | int err = input_add_uevent_bm_var(env, name, bm, max); \ |
a7fadbe1 DT |
1115 | if (err) \ |
1116 | return err; \ | |
1117 | } while (0) | |
1118 | ||
ac648a6a DT |
1119 | #define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev) \ |
1120 | do { \ | |
7eff2e7a | 1121 | int err = input_add_uevent_modalias_var(env, dev); \ |
ac648a6a DT |
1122 | if (err) \ |
1123 | return err; \ | |
1124 | } while (0) | |
1125 | ||
7eff2e7a | 1126 | static int input_dev_uevent(struct device *device, struct kobj_uevent_env *env) |
a7fadbe1 | 1127 | { |
9657d75c | 1128 | struct input_dev *dev = to_input_dev(device); |
a7fadbe1 DT |
1129 | |
1130 | INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x", | |
1131 | dev->id.bustype, dev->id.vendor, | |
1132 | dev->id.product, dev->id.version); | |
1133 | if (dev->name) | |
1134 | INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name); | |
1135 | if (dev->phys) | |
1136 | INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys); | |
08de1f04 | 1137 | if (dev->uniq) |
a7fadbe1 DT |
1138 | INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq); |
1139 | ||
1140 | INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX); | |
1141 | if (test_bit(EV_KEY, dev->evbit)) | |
1142 | INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX); | |
1143 | if (test_bit(EV_REL, dev->evbit)) | |
1144 | INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX); | |
1145 | if (test_bit(EV_ABS, dev->evbit)) | |
1146 | INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX); | |
1147 | if (test_bit(EV_MSC, dev->evbit)) | |
1148 | INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX); | |
1149 | if (test_bit(EV_LED, dev->evbit)) | |
1150 | INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX); | |
1151 | if (test_bit(EV_SND, dev->evbit)) | |
1152 | INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX); | |
1153 | if (test_bit(EV_FF, dev->evbit)) | |
1154 | INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX); | |
1155 | if (test_bit(EV_SW, dev->evbit)) | |
1156 | INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX); | |
1157 | ||
ac648a6a | 1158 | INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev); |
a7fadbe1 DT |
1159 | |
1160 | return 0; | |
1161 | } | |
1162 | ||
9657d75c DT |
1163 | static struct device_type input_dev_type = { |
1164 | .groups = input_dev_attr_groups, | |
1165 | .release = input_dev_release, | |
1166 | .uevent = input_dev_uevent, | |
1167 | }; | |
1168 | ||
ea9f240b | 1169 | struct class input_class = { |
9657d75c | 1170 | .name = "input", |
d19fbe8a | 1171 | }; |
ca56fe07 | 1172 | EXPORT_SYMBOL_GPL(input_class); |
d19fbe8a | 1173 | |
1447190e DT |
1174 | /** |
1175 | * input_allocate_device - allocate memory for new input device | |
1176 | * | |
1177 | * Returns prepared struct input_dev or NULL. | |
1178 | * | |
1179 | * NOTE: Use input_free_device() to free devices that have not been | |
1180 | * registered; input_unregister_device() should be used for already | |
1181 | * registered devices. | |
1182 | */ | |
d19fbe8a DT |
1183 | struct input_dev *input_allocate_device(void) |
1184 | { | |
1185 | struct input_dev *dev; | |
1186 | ||
1187 | dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL); | |
1188 | if (dev) { | |
9657d75c DT |
1189 | dev->dev.type = &input_dev_type; |
1190 | dev->dev.class = &input_class; | |
1191 | device_initialize(&dev->dev); | |
f60d2b11 | 1192 | mutex_init(&dev->mutex); |
8006479c | 1193 | spin_lock_init(&dev->event_lock); |
d19fbe8a DT |
1194 | INIT_LIST_HEAD(&dev->h_list); |
1195 | INIT_LIST_HEAD(&dev->node); | |
655816e4 DT |
1196 | |
1197 | __module_get(THIS_MODULE); | |
d19fbe8a DT |
1198 | } |
1199 | ||
1200 | return dev; | |
1201 | } | |
ca56fe07 | 1202 | EXPORT_SYMBOL(input_allocate_device); |
d19fbe8a | 1203 | |
1447190e DT |
1204 | /** |
1205 | * input_free_device - free memory occupied by input_dev structure | |
1206 | * @dev: input device to free | |
1207 | * | |
1208 | * This function should only be used if input_register_device() | |
1209 | * was not called yet or if it failed. Once device was registered | |
1210 | * use input_unregister_device() and memory will be freed once last | |
8006479c | 1211 | * reference to the device is dropped. |
1447190e DT |
1212 | * |
1213 | * Device should be allocated by input_allocate_device(). | |
1214 | * | |
1215 | * NOTE: If there are references to the input device then memory | |
1216 | * will not be freed until last reference is dropped. | |
1217 | */ | |
f60d2b11 DT |
1218 | void input_free_device(struct input_dev *dev) |
1219 | { | |
54f9e36c | 1220 | if (dev) |
f60d2b11 | 1221 | input_put_device(dev); |
f60d2b11 | 1222 | } |
ca56fe07 | 1223 | EXPORT_SYMBOL(input_free_device); |
f60d2b11 | 1224 | |
534565f2 DT |
1225 | /** |
1226 | * input_set_capability - mark device as capable of a certain event | |
1227 | * @dev: device that is capable of emitting or accepting event | |
1228 | * @type: type of the event (EV_KEY, EV_REL, etc...) | |
1229 | * @code: event code | |
1230 | * | |
1231 | * In addition to setting up corresponding bit in appropriate capability | |
1232 | * bitmap the function also adjusts dev->evbit. | |
1233 | */ | |
1234 | void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code) | |
1235 | { | |
1236 | switch (type) { | |
1237 | case EV_KEY: | |
1238 | __set_bit(code, dev->keybit); | |
1239 | break; | |
1240 | ||
1241 | case EV_REL: | |
1242 | __set_bit(code, dev->relbit); | |
1243 | break; | |
1244 | ||
1245 | case EV_ABS: | |
1246 | __set_bit(code, dev->absbit); | |
1247 | break; | |
1248 | ||
1249 | case EV_MSC: | |
1250 | __set_bit(code, dev->mscbit); | |
1251 | break; | |
1252 | ||
1253 | case EV_SW: | |
1254 | __set_bit(code, dev->swbit); | |
1255 | break; | |
1256 | ||
1257 | case EV_LED: | |
1258 | __set_bit(code, dev->ledbit); | |
1259 | break; | |
1260 | ||
1261 | case EV_SND: | |
1262 | __set_bit(code, dev->sndbit); | |
1263 | break; | |
1264 | ||
1265 | case EV_FF: | |
1266 | __set_bit(code, dev->ffbit); | |
1267 | break; | |
1268 | ||
1269 | default: | |
1270 | printk(KERN_ERR | |
1271 | "input_set_capability: unknown type %u (code %u)\n", | |
1272 | type, code); | |
1273 | dump_stack(); | |
1274 | return; | |
1275 | } | |
1276 | ||
1277 | __set_bit(type, dev->evbit); | |
1278 | } | |
1279 | EXPORT_SYMBOL(input_set_capability); | |
1280 | ||
8006479c DT |
1281 | /** |
1282 | * input_register_device - register device with input core | |
1283 | * @dev: device to be registered | |
1284 | * | |
1285 | * This function registers device with input core. The device must be | |
1286 | * allocated with input_allocate_device() and all it's capabilities | |
1287 | * set up before registering. | |
1288 | * If function fails the device must be freed with input_free_device(). | |
1289 | * Once device has been successfully registered it can be unregistered | |
1290 | * with input_unregister_device(); input_free_device() should not be | |
1291 | * called in this case. | |
1292 | */ | |
5f945489 | 1293 | int input_register_device(struct input_dev *dev) |
1da177e4 | 1294 | { |
bd0ef235 | 1295 | static atomic_t input_no = ATOMIC_INIT(0); |
1da177e4 | 1296 | struct input_handler *handler; |
bd0ef235 DT |
1297 | const char *path; |
1298 | int error; | |
1da177e4 | 1299 | |
8006479c | 1300 | __set_bit(EV_SYN, dev->evbit); |
0fbf87ca | 1301 | |
1da177e4 LT |
1302 | /* |
1303 | * If delay and period are pre-set by the driver, then autorepeating | |
1304 | * is handled by the driver itself and we don't do it in input.c. | |
1305 | */ | |
1306 | ||
1307 | init_timer(&dev->timer); | |
1308 | if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) { | |
1309 | dev->timer.data = (long) dev; | |
1310 | dev->timer.function = input_repeat_key; | |
1311 | dev->rep[REP_DELAY] = 250; | |
1312 | dev->rep[REP_PERIOD] = 33; | |
1313 | } | |
1314 | ||
c8e4c772 MR |
1315 | if (!dev->getkeycode) |
1316 | dev->getkeycode = input_default_getkeycode; | |
1317 | ||
1318 | if (!dev->setkeycode) | |
1319 | dev->setkeycode = input_default_setkeycode; | |
1320 | ||
9657d75c | 1321 | snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id), |
bd0ef235 DT |
1322 | "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1); |
1323 | ||
9657d75c DT |
1324 | if (dev->cdev.dev) |
1325 | dev->dev.parent = dev->cdev.dev; | |
88a447a0 | 1326 | |
9657d75c | 1327 | error = device_add(&dev->dev); |
bd0ef235 DT |
1328 | if (error) |
1329 | return error; | |
1330 | ||
9657d75c | 1331 | path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
bd0ef235 DT |
1332 | printk(KERN_INFO "input: %s as %s\n", |
1333 | dev->name ? dev->name : "Unspecified device", path ? path : "N/A"); | |
1334 | kfree(path); | |
10204020 | 1335 | |
8006479c DT |
1336 | error = mutex_lock_interruptible(&input_mutex); |
1337 | if (error) { | |
1338 | device_del(&dev->dev); | |
1339 | return error; | |
1340 | } | |
1341 | ||
1342 | list_add_tail(&dev->node, &input_dev_list); | |
1343 | ||
1da177e4 | 1344 | list_for_each_entry(handler, &input_handler_list, node) |
5b2a0826 | 1345 | input_attach_handler(dev, handler); |
1da177e4 | 1346 | |
f96b434d | 1347 | input_wakeup_procfs_readers(); |
5f945489 | 1348 | |
8006479c DT |
1349 | mutex_unlock(&input_mutex); |
1350 | ||
5f945489 | 1351 | return 0; |
1da177e4 | 1352 | } |
ca56fe07 | 1353 | EXPORT_SYMBOL(input_register_device); |
1da177e4 | 1354 | |
8006479c DT |
1355 | /** |
1356 | * input_unregister_device - unregister previously registered device | |
1357 | * @dev: device to be unregistered | |
1358 | * | |
1359 | * This function unregisters an input device. Once device is unregistered | |
1360 | * the caller should not try to access it as it may get freed at any moment. | |
1361 | */ | |
1da177e4 LT |
1362 | void input_unregister_device(struct input_dev *dev) |
1363 | { | |
5b2a0826 | 1364 | struct input_handle *handle, *next; |
1da177e4 | 1365 | |
8006479c | 1366 | input_disconnect_device(dev); |
1da177e4 | 1367 | |
8006479c | 1368 | mutex_lock(&input_mutex); |
1da177e4 | 1369 | |
5b2a0826 | 1370 | list_for_each_entry_safe(handle, next, &dev->h_list, d_node) |
1da177e4 | 1371 | handle->handler->disconnect(handle); |
5b2a0826 | 1372 | WARN_ON(!list_empty(&dev->h_list)); |
1da177e4 | 1373 | |
8006479c | 1374 | del_timer_sync(&dev->timer); |
1da177e4 LT |
1375 | list_del_init(&dev->node); |
1376 | ||
f96b434d | 1377 | input_wakeup_procfs_readers(); |
8006479c DT |
1378 | |
1379 | mutex_unlock(&input_mutex); | |
1380 | ||
1381 | device_unregister(&dev->dev); | |
1da177e4 | 1382 | } |
ca56fe07 | 1383 | EXPORT_SYMBOL(input_unregister_device); |
1da177e4 | 1384 | |
8006479c DT |
1385 | /** |
1386 | * input_register_handler - register a new input handler | |
1387 | * @handler: handler to be registered | |
1388 | * | |
1389 | * This function registers a new input handler (interface) for input | |
1390 | * devices in the system and attaches it to all input devices that | |
1391 | * are compatible with the handler. | |
1392 | */ | |
4263cf0f | 1393 | int input_register_handler(struct input_handler *handler) |
1da177e4 LT |
1394 | { |
1395 | struct input_dev *dev; | |
8006479c DT |
1396 | int retval; |
1397 | ||
1398 | retval = mutex_lock_interruptible(&input_mutex); | |
1399 | if (retval) | |
1400 | return retval; | |
1da177e4 | 1401 | |
1da177e4 LT |
1402 | INIT_LIST_HEAD(&handler->h_list); |
1403 | ||
4263cf0f | 1404 | if (handler->fops != NULL) { |
8006479c DT |
1405 | if (input_table[handler->minor >> 5]) { |
1406 | retval = -EBUSY; | |
1407 | goto out; | |
1408 | } | |
1da177e4 | 1409 | input_table[handler->minor >> 5] = handler; |
4263cf0f | 1410 | } |
1da177e4 LT |
1411 | |
1412 | list_add_tail(&handler->node, &input_handler_list); | |
1413 | ||
1414 | list_for_each_entry(dev, &input_dev_list, node) | |
5b2a0826 | 1415 | input_attach_handler(dev, handler); |
1da177e4 | 1416 | |
f96b434d | 1417 | input_wakeup_procfs_readers(); |
8006479c DT |
1418 | |
1419 | out: | |
1420 | mutex_unlock(&input_mutex); | |
1421 | return retval; | |
1da177e4 | 1422 | } |
ca56fe07 | 1423 | EXPORT_SYMBOL(input_register_handler); |
1da177e4 | 1424 | |
8006479c DT |
1425 | /** |
1426 | * input_unregister_handler - unregisters an input handler | |
1427 | * @handler: handler to be unregistered | |
1428 | * | |
1429 | * This function disconnects a handler from its input devices and | |
1430 | * removes it from lists of known handlers. | |
1431 | */ | |
1da177e4 LT |
1432 | void input_unregister_handler(struct input_handler *handler) |
1433 | { | |
5b2a0826 | 1434 | struct input_handle *handle, *next; |
1da177e4 | 1435 | |
8006479c DT |
1436 | mutex_lock(&input_mutex); |
1437 | ||
5b2a0826 | 1438 | list_for_each_entry_safe(handle, next, &handler->h_list, h_node) |
1da177e4 | 1439 | handler->disconnect(handle); |
5b2a0826 | 1440 | WARN_ON(!list_empty(&handler->h_list)); |
1da177e4 LT |
1441 | |
1442 | list_del_init(&handler->node); | |
1443 | ||
1444 | if (handler->fops != NULL) | |
1445 | input_table[handler->minor >> 5] = NULL; | |
1446 | ||
f96b434d | 1447 | input_wakeup_procfs_readers(); |
8006479c DT |
1448 | |
1449 | mutex_unlock(&input_mutex); | |
1da177e4 | 1450 | } |
ca56fe07 | 1451 | EXPORT_SYMBOL(input_unregister_handler); |
1da177e4 | 1452 | |
8006479c DT |
1453 | /** |
1454 | * input_register_handle - register a new input handle | |
1455 | * @handle: handle to register | |
1456 | * | |
1457 | * This function puts a new input handle onto device's | |
1458 | * and handler's lists so that events can flow through | |
1459 | * it once it is opened using input_open_device(). | |
1460 | * | |
1461 | * This function is supposed to be called from handler's | |
1462 | * connect() method. | |
1463 | */ | |
5b2a0826 DT |
1464 | int input_register_handle(struct input_handle *handle) |
1465 | { | |
1466 | struct input_handler *handler = handle->handler; | |
8006479c DT |
1467 | struct input_dev *dev = handle->dev; |
1468 | int error; | |
1469 | ||
1470 | /* | |
1471 | * We take dev->mutex here to prevent race with | |
1472 | * input_release_device(). | |
1473 | */ | |
1474 | error = mutex_lock_interruptible(&dev->mutex); | |
1475 | if (error) | |
1476 | return error; | |
1477 | list_add_tail_rcu(&handle->d_node, &dev->h_list); | |
1478 | mutex_unlock(&dev->mutex); | |
82ba56c2 | 1479 | synchronize_rcu(); |
5b2a0826 | 1480 | |
8006479c DT |
1481 | /* |
1482 | * Since we are supposed to be called from ->connect() | |
1483 | * which is mutually exclusive with ->disconnect() | |
1484 | * we can't be racing with input_unregister_handle() | |
1485 | * and so separate lock is not needed here. | |
1486 | */ | |
5b2a0826 DT |
1487 | list_add_tail(&handle->h_node, &handler->h_list); |
1488 | ||
1489 | if (handler->start) | |
1490 | handler->start(handle); | |
1491 | ||
1492 | return 0; | |
1493 | } | |
1494 | EXPORT_SYMBOL(input_register_handle); | |
1495 | ||
8006479c DT |
1496 | /** |
1497 | * input_unregister_handle - unregister an input handle | |
1498 | * @handle: handle to unregister | |
1499 | * | |
1500 | * This function removes input handle from device's | |
1501 | * and handler's lists. | |
1502 | * | |
1503 | * This function is supposed to be called from handler's | |
1504 | * disconnect() method. | |
1505 | */ | |
5b2a0826 DT |
1506 | void input_unregister_handle(struct input_handle *handle) |
1507 | { | |
8006479c DT |
1508 | struct input_dev *dev = handle->dev; |
1509 | ||
5b2a0826 | 1510 | list_del_init(&handle->h_node); |
8006479c DT |
1511 | |
1512 | /* | |
1513 | * Take dev->mutex to prevent race with input_release_device(). | |
1514 | */ | |
1515 | mutex_lock(&dev->mutex); | |
1516 | list_del_rcu(&handle->d_node); | |
1517 | mutex_unlock(&dev->mutex); | |
82ba56c2 | 1518 | synchronize_rcu(); |
5b2a0826 DT |
1519 | } |
1520 | EXPORT_SYMBOL(input_unregister_handle); | |
1521 | ||
1da177e4 LT |
1522 | static int input_open_file(struct inode *inode, struct file *file) |
1523 | { | |
1524 | struct input_handler *handler = input_table[iminor(inode) >> 5]; | |
99ac48f5 | 1525 | const struct file_operations *old_fops, *new_fops = NULL; |
1da177e4 LT |
1526 | int err; |
1527 | ||
1528 | /* No load-on-demand here? */ | |
1529 | if (!handler || !(new_fops = fops_get(handler->fops))) | |
1530 | return -ENODEV; | |
1531 | ||
1532 | /* | |
1533 | * That's _really_ odd. Usually NULL ->open means "nothing special", | |
1534 | * not "no device". Oh, well... | |
1535 | */ | |
1536 | if (!new_fops->open) { | |
1537 | fops_put(new_fops); | |
1538 | return -ENODEV; | |
1539 | } | |
1540 | old_fops = file->f_op; | |
1541 | file->f_op = new_fops; | |
1542 | ||
1543 | err = new_fops->open(inode, file); | |
1544 | ||
1545 | if (err) { | |
1546 | fops_put(file->f_op); | |
1547 | file->f_op = fops_get(old_fops); | |
1548 | } | |
1549 | fops_put(old_fops); | |
1550 | return err; | |
1551 | } | |
1552 | ||
2b8693c0 | 1553 | static const struct file_operations input_fops = { |
1da177e4 LT |
1554 | .owner = THIS_MODULE, |
1555 | .open = input_open_file, | |
1556 | }; | |
1557 | ||
f96b434d | 1558 | static int __init input_init(void) |
1da177e4 | 1559 | { |
f96b434d | 1560 | int err; |
1da177e4 | 1561 | |
ea9f240b | 1562 | err = class_register(&input_class); |
d19fbe8a DT |
1563 | if (err) { |
1564 | printk(KERN_ERR "input: unable to register input_dev class\n"); | |
1565 | return err; | |
1566 | } | |
1567 | ||
f96b434d DT |
1568 | err = input_proc_init(); |
1569 | if (err) | |
b0fdfebb | 1570 | goto fail1; |
1da177e4 | 1571 | |
f96b434d DT |
1572 | err = register_chrdev(INPUT_MAJOR, "input", &input_fops); |
1573 | if (err) { | |
1574 | printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR); | |
b0fdfebb | 1575 | goto fail2; |
1da177e4 | 1576 | } |
e334016f | 1577 | |
1da177e4 | 1578 | return 0; |
1da177e4 | 1579 | |
b0fdfebb | 1580 | fail2: input_proc_exit(); |
ea9f240b | 1581 | fail1: class_unregister(&input_class); |
f96b434d | 1582 | return err; |
1da177e4 LT |
1583 | } |
1584 | ||
1585 | static void __exit input_exit(void) | |
1586 | { | |
f96b434d | 1587 | input_proc_exit(); |
1da177e4 | 1588 | unregister_chrdev(INPUT_MAJOR, "input"); |
ea9f240b | 1589 | class_unregister(&input_class); |
1da177e4 LT |
1590 | } |
1591 | ||
1592 | subsys_initcall(input_init); | |
1593 | module_exit(input_exit); |