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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> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/smp_lock.h> | |
16 | #include <linux/input.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/random.h> | |
19 | #include <linux/major.h> | |
20 | #include <linux/proc_fs.h> | |
969b21cd | 21 | #include <linux/seq_file.h> |
1da177e4 LT |
22 | #include <linux/interrupt.h> |
23 | #include <linux/poll.h> | |
24 | #include <linux/device.h> | |
e676c232 | 25 | #include <linux/mutex.h> |
1da177e4 LT |
26 | |
27 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); | |
28 | MODULE_DESCRIPTION("Input core"); | |
29 | MODULE_LICENSE("GPL"); | |
30 | ||
1da177e4 LT |
31 | #define INPUT_DEVICES 256 |
32 | ||
33 | static LIST_HEAD(input_dev_list); | |
34 | static LIST_HEAD(input_handler_list); | |
35 | ||
36 | static struct input_handler *input_table[8]; | |
37 | ||
0e739d28 DT |
38 | /** |
39 | * input_event() - report new input event | |
1447190e | 40 | * @dev: device that generated the event |
0e739d28 DT |
41 | * @type: type of the event |
42 | * @code: event code | |
43 | * @value: value of the event | |
44 | * | |
45 | * This function should be used by drivers implementing various input devices | |
46 | * See also input_inject_event() | |
47 | */ | |
1da177e4 LT |
48 | void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) |
49 | { | |
50 | struct input_handle *handle; | |
51 | ||
52 | if (type > EV_MAX || !test_bit(type, dev->evbit)) | |
53 | return; | |
54 | ||
55 | add_input_randomness(type, code, value); | |
56 | ||
57 | switch (type) { | |
58 | ||
59 | case EV_SYN: | |
60 | switch (code) { | |
61 | case SYN_CONFIG: | |
1e0afb28 DT |
62 | if (dev->event) |
63 | dev->event(dev, type, code, value); | |
1da177e4 LT |
64 | break; |
65 | ||
66 | case SYN_REPORT: | |
1e0afb28 DT |
67 | if (dev->sync) |
68 | return; | |
1da177e4 LT |
69 | dev->sync = 1; |
70 | break; | |
71 | } | |
72 | break; | |
73 | ||
74 | case EV_KEY: | |
75 | ||
76 | if (code > KEY_MAX || !test_bit(code, dev->keybit) || !!test_bit(code, dev->key) == value) | |
77 | return; | |
78 | ||
79 | if (value == 2) | |
80 | break; | |
81 | ||
82 | change_bit(code, dev->key); | |
83 | ||
84 | if (test_bit(EV_REP, dev->evbit) && dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && dev->timer.data && value) { | |
85 | dev->repeat_key = code; | |
86 | mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_DELAY])); | |
87 | } | |
88 | ||
89 | break; | |
90 | ||
31581066 RP |
91 | case EV_SW: |
92 | ||
93 | if (code > SW_MAX || !test_bit(code, dev->swbit) || !!test_bit(code, dev->sw) == value) | |
94 | return; | |
95 | ||
96 | change_bit(code, dev->sw); | |
97 | ||
98 | break; | |
99 | ||
1da177e4 LT |
100 | case EV_ABS: |
101 | ||
102 | if (code > ABS_MAX || !test_bit(code, dev->absbit)) | |
103 | return; | |
104 | ||
105 | if (dev->absfuzz[code]) { | |
106 | if ((value > dev->abs[code] - (dev->absfuzz[code] >> 1)) && | |
107 | (value < dev->abs[code] + (dev->absfuzz[code] >> 1))) | |
108 | return; | |
109 | ||
110 | if ((value > dev->abs[code] - dev->absfuzz[code]) && | |
111 | (value < dev->abs[code] + dev->absfuzz[code])) | |
112 | value = (dev->abs[code] * 3 + value) >> 2; | |
113 | ||
114 | if ((value > dev->abs[code] - (dev->absfuzz[code] << 1)) && | |
115 | (value < dev->abs[code] + (dev->absfuzz[code] << 1))) | |
116 | value = (dev->abs[code] + value) >> 1; | |
117 | } | |
118 | ||
119 | if (dev->abs[code] == value) | |
120 | return; | |
121 | ||
122 | dev->abs[code] = value; | |
123 | break; | |
124 | ||
125 | case EV_REL: | |
126 | ||
127 | if (code > REL_MAX || !test_bit(code, dev->relbit) || (value == 0)) | |
128 | return; | |
129 | ||
130 | break; | |
131 | ||
132 | case EV_MSC: | |
133 | ||
134 | if (code > MSC_MAX || !test_bit(code, dev->mscbit)) | |
135 | return; | |
136 | ||
1e0afb28 DT |
137 | if (dev->event) |
138 | dev->event(dev, type, code, value); | |
1da177e4 LT |
139 | |
140 | break; | |
141 | ||
142 | case EV_LED: | |
143 | ||
144 | if (code > LED_MAX || !test_bit(code, dev->ledbit) || !!test_bit(code, dev->led) == value) | |
145 | return; | |
146 | ||
147 | change_bit(code, dev->led); | |
1e0afb28 DT |
148 | |
149 | if (dev->event) | |
150 | dev->event(dev, type, code, value); | |
1da177e4 LT |
151 | |
152 | break; | |
153 | ||
154 | case EV_SND: | |
155 | ||
156 | if (code > SND_MAX || !test_bit(code, dev->sndbit)) | |
157 | return; | |
158 | ||
8fdc1948 DT |
159 | if (!!test_bit(code, dev->snd) != !!value) |
160 | change_bit(code, dev->snd); | |
161 | ||
1e0afb28 DT |
162 | if (dev->event) |
163 | dev->event(dev, type, code, value); | |
1da177e4 LT |
164 | |
165 | break; | |
166 | ||
167 | case EV_REP: | |
168 | ||
1e0afb28 DT |
169 | if (code > REP_MAX || value < 0 || dev->rep[code] == value) |
170 | return; | |
1da177e4 LT |
171 | |
172 | dev->rep[code] = value; | |
1e0afb28 DT |
173 | if (dev->event) |
174 | dev->event(dev, type, code, value); | |
1da177e4 LT |
175 | |
176 | break; | |
177 | ||
178 | case EV_FF: | |
509ca1a9 AH |
179 | |
180 | if (value < 0) | |
181 | return; | |
182 | ||
1e0afb28 DT |
183 | if (dev->event) |
184 | dev->event(dev, type, code, value); | |
1da177e4 LT |
185 | break; |
186 | } | |
187 | ||
188 | if (type != EV_SYN) | |
189 | dev->sync = 0; | |
190 | ||
191 | if (dev->grab) | |
192 | dev->grab->handler->event(dev->grab, type, code, value); | |
193 | else | |
194 | list_for_each_entry(handle, &dev->h_list, d_node) | |
195 | if (handle->open) | |
196 | handle->handler->event(handle, type, code, value); | |
197 | } | |
ca56fe07 | 198 | EXPORT_SYMBOL(input_event); |
1da177e4 | 199 | |
0e739d28 DT |
200 | /** |
201 | * input_inject_event() - send input event from input handler | |
202 | * @handle: input handle to send event through | |
203 | * @type: type of the event | |
204 | * @code: event code | |
205 | * @value: value of the event | |
206 | * | |
207 | * Similar to input_event() but will ignore event if device is "grabbed" and handle | |
208 | * injecting event is not the one that owns the device. | |
209 | */ | |
210 | void input_inject_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) | |
211 | { | |
212 | if (!handle->dev->grab || handle->dev->grab == handle) | |
213 | input_event(handle->dev, type, code, value); | |
214 | } | |
215 | EXPORT_SYMBOL(input_inject_event); | |
216 | ||
1da177e4 LT |
217 | static void input_repeat_key(unsigned long data) |
218 | { | |
219 | struct input_dev *dev = (void *) data; | |
220 | ||
221 | if (!test_bit(dev->repeat_key, dev->key)) | |
222 | return; | |
223 | ||
224 | input_event(dev, EV_KEY, dev->repeat_key, 2); | |
225 | input_sync(dev); | |
226 | ||
227 | if (dev->rep[REP_PERIOD]) | |
228 | mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_PERIOD])); | |
229 | } | |
230 | ||
1da177e4 LT |
231 | int input_grab_device(struct input_handle *handle) |
232 | { | |
233 | if (handle->dev->grab) | |
234 | return -EBUSY; | |
235 | ||
236 | handle->dev->grab = handle; | |
237 | return 0; | |
238 | } | |
ca56fe07 | 239 | EXPORT_SYMBOL(input_grab_device); |
1da177e4 LT |
240 | |
241 | void input_release_device(struct input_handle *handle) | |
242 | { | |
a2b2ed2c | 243 | struct input_dev *dev = handle->dev; |
c7e8dc6e | 244 | |
a2b2ed2c AM |
245 | if (dev->grab == handle) { |
246 | dev->grab = NULL; | |
247 | ||
248 | list_for_each_entry(handle, &dev->h_list, d_node) | |
c7e8dc6e DT |
249 | if (handle->handler->start) |
250 | handle->handler->start(handle); | |
251 | } | |
1da177e4 | 252 | } |
ca56fe07 | 253 | EXPORT_SYMBOL(input_release_device); |
1da177e4 LT |
254 | |
255 | int input_open_device(struct input_handle *handle) | |
256 | { | |
0fbf87ca DT |
257 | struct input_dev *dev = handle->dev; |
258 | int err; | |
259 | ||
e676c232 | 260 | err = mutex_lock_interruptible(&dev->mutex); |
0fbf87ca DT |
261 | if (err) |
262 | return err; | |
263 | ||
1da177e4 | 264 | handle->open++; |
0fbf87ca DT |
265 | |
266 | if (!dev->users++ && dev->open) | |
267 | err = dev->open(dev); | |
268 | ||
269 | if (err) | |
270 | handle->open--; | |
271 | ||
e676c232 | 272 | mutex_unlock(&dev->mutex); |
0fbf87ca DT |
273 | |
274 | return err; | |
1da177e4 | 275 | } |
ca56fe07 | 276 | EXPORT_SYMBOL(input_open_device); |
1da177e4 LT |
277 | |
278 | int input_flush_device(struct input_handle* handle, struct file* file) | |
279 | { | |
280 | if (handle->dev->flush) | |
281 | return handle->dev->flush(handle->dev, file); | |
282 | ||
283 | return 0; | |
284 | } | |
ca56fe07 | 285 | EXPORT_SYMBOL(input_flush_device); |
1da177e4 LT |
286 | |
287 | void input_close_device(struct input_handle *handle) | |
288 | { | |
0fbf87ca DT |
289 | struct input_dev *dev = handle->dev; |
290 | ||
1da177e4 | 291 | input_release_device(handle); |
0fbf87ca | 292 | |
e676c232 | 293 | mutex_lock(&dev->mutex); |
0fbf87ca DT |
294 | |
295 | if (!--dev->users && dev->close) | |
296 | dev->close(dev); | |
1da177e4 | 297 | handle->open--; |
0fbf87ca | 298 | |
e676c232 | 299 | mutex_unlock(&dev->mutex); |
1da177e4 | 300 | } |
ca56fe07 | 301 | EXPORT_SYMBOL(input_close_device); |
1da177e4 LT |
302 | |
303 | static void input_link_handle(struct input_handle *handle) | |
304 | { | |
305 | list_add_tail(&handle->d_node, &handle->dev->h_list); | |
306 | list_add_tail(&handle->h_node, &handle->handler->h_list); | |
307 | } | |
308 | ||
309 | #define MATCH_BIT(bit, max) \ | |
310 | for (i = 0; i < NBITS(max); i++) \ | |
311 | if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \ | |
312 | break; \ | |
313 | if (i != NBITS(max)) \ | |
314 | continue; | |
315 | ||
66e66118 DT |
316 | static const struct input_device_id *input_match_device(const struct input_device_id *id, |
317 | struct input_dev *dev) | |
1da177e4 LT |
318 | { |
319 | int i; | |
320 | ||
321 | for (; id->flags || id->driver_info; id++) { | |
322 | ||
323 | if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) | |
ddc5d341 | 324 | if (id->bustype != dev->id.bustype) |
1da177e4 LT |
325 | continue; |
326 | ||
327 | if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) | |
ddc5d341 | 328 | if (id->vendor != dev->id.vendor) |
1da177e4 LT |
329 | continue; |
330 | ||
331 | if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) | |
ddc5d341 | 332 | if (id->product != dev->id.product) |
1da177e4 LT |
333 | continue; |
334 | ||
335 | if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) | |
ddc5d341 | 336 | if (id->version != dev->id.version) |
1da177e4 LT |
337 | continue; |
338 | ||
339 | MATCH_BIT(evbit, EV_MAX); | |
340 | MATCH_BIT(keybit, KEY_MAX); | |
341 | MATCH_BIT(relbit, REL_MAX); | |
342 | MATCH_BIT(absbit, ABS_MAX); | |
343 | MATCH_BIT(mscbit, MSC_MAX); | |
344 | MATCH_BIT(ledbit, LED_MAX); | |
345 | MATCH_BIT(sndbit, SND_MAX); | |
346 | MATCH_BIT(ffbit, FF_MAX); | |
ff13f98b | 347 | MATCH_BIT(swbit, SW_MAX); |
1da177e4 LT |
348 | |
349 | return id; | |
350 | } | |
351 | ||
352 | return NULL; | |
353 | } | |
354 | ||
f96b434d DT |
355 | #ifdef CONFIG_PROC_FS |
356 | ||
357 | static struct proc_dir_entry *proc_bus_input_dir; | |
358 | static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait); | |
359 | static int input_devices_state; | |
360 | ||
361 | static inline void input_wakeup_procfs_readers(void) | |
362 | { | |
363 | input_devices_state++; | |
364 | wake_up(&input_devices_poll_wait); | |
365 | } | |
366 | ||
969b21cd | 367 | static unsigned int input_proc_devices_poll(struct file *file, poll_table *wait) |
f96b434d DT |
368 | { |
369 | int state = input_devices_state; | |
1e0afb28 | 370 | |
f96b434d DT |
371 | poll_wait(file, &input_devices_poll_wait, wait); |
372 | if (state != input_devices_state) | |
373 | return POLLIN | POLLRDNORM; | |
1e0afb28 | 374 | |
f96b434d DT |
375 | return 0; |
376 | } | |
377 | ||
969b21cd DT |
378 | static struct list_head *list_get_nth_element(struct list_head *list, loff_t *pos) |
379 | { | |
380 | struct list_head *node; | |
381 | loff_t i = 0; | |
f96b434d | 382 | |
969b21cd DT |
383 | list_for_each(node, list) |
384 | if (i++ == *pos) | |
385 | return node; | |
386 | ||
387 | return NULL; | |
388 | } | |
f96b434d | 389 | |
969b21cd | 390 | static struct list_head *list_get_next_element(struct list_head *list, struct list_head *element, loff_t *pos) |
f96b434d | 391 | { |
969b21cd DT |
392 | if (element->next == list) |
393 | return NULL; | |
f96b434d | 394 | |
969b21cd DT |
395 | ++(*pos); |
396 | return element->next; | |
397 | } | |
f96b434d | 398 | |
969b21cd DT |
399 | static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos) |
400 | { | |
401 | /* acquire lock here ... Yes, we do need locking, I knowi, I know... */ | |
f96b434d | 402 | |
969b21cd DT |
403 | return list_get_nth_element(&input_dev_list, pos); |
404 | } | |
051b2fea | 405 | |
969b21cd DT |
406 | static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
407 | { | |
408 | return list_get_next_element(&input_dev_list, v, pos); | |
409 | } | |
f96b434d | 410 | |
969b21cd DT |
411 | static void input_devices_seq_stop(struct seq_file *seq, void *v) |
412 | { | |
413 | /* release lock here */ | |
414 | } | |
f96b434d | 415 | |
969b21cd DT |
416 | static void input_seq_print_bitmap(struct seq_file *seq, const char *name, |
417 | unsigned long *bitmap, int max) | |
418 | { | |
419 | int i; | |
051b2fea | 420 | |
969b21cd DT |
421 | for (i = NBITS(max) - 1; i > 0; i--) |
422 | if (bitmap[i]) | |
423 | break; | |
f96b434d | 424 | |
969b21cd DT |
425 | seq_printf(seq, "B: %s=", name); |
426 | for (; i >= 0; i--) | |
427 | seq_printf(seq, "%lx%s", bitmap[i], i > 0 ? " " : ""); | |
428 | seq_putc(seq, '\n'); | |
429 | } | |
f96b434d | 430 | |
969b21cd DT |
431 | static int input_devices_seq_show(struct seq_file *seq, void *v) |
432 | { | |
433 | struct input_dev *dev = container_of(v, struct input_dev, node); | |
434 | const char *path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL); | |
435 | struct input_handle *handle; | |
436 | ||
437 | seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n", | |
438 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); | |
439 | ||
440 | seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); | |
441 | seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : ""); | |
442 | seq_printf(seq, "S: Sysfs=%s\n", path ? path : ""); | |
443 | seq_printf(seq, "H: Handlers="); | |
444 | ||
445 | list_for_each_entry(handle, &dev->h_list, d_node) | |
446 | seq_printf(seq, "%s ", handle->name); | |
447 | seq_putc(seq, '\n'); | |
448 | ||
449 | input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX); | |
450 | if (test_bit(EV_KEY, dev->evbit)) | |
451 | input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX); | |
452 | if (test_bit(EV_REL, dev->evbit)) | |
453 | input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX); | |
454 | if (test_bit(EV_ABS, dev->evbit)) | |
455 | input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX); | |
456 | if (test_bit(EV_MSC, dev->evbit)) | |
457 | input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX); | |
458 | if (test_bit(EV_LED, dev->evbit)) | |
459 | input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX); | |
460 | if (test_bit(EV_SND, dev->evbit)) | |
461 | input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX); | |
462 | if (test_bit(EV_FF, dev->evbit)) | |
463 | input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX); | |
464 | if (test_bit(EV_SW, dev->evbit)) | |
465 | input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX); | |
466 | ||
467 | seq_putc(seq, '\n'); | |
468 | ||
469 | kfree(path); | |
470 | return 0; | |
f96b434d DT |
471 | } |
472 | ||
969b21cd DT |
473 | static struct seq_operations input_devices_seq_ops = { |
474 | .start = input_devices_seq_start, | |
475 | .next = input_devices_seq_next, | |
476 | .stop = input_devices_seq_stop, | |
477 | .show = input_devices_seq_show, | |
478 | }; | |
479 | ||
480 | static int input_proc_devices_open(struct inode *inode, struct file *file) | |
f96b434d | 481 | { |
969b21cd DT |
482 | return seq_open(file, &input_devices_seq_ops); |
483 | } | |
484 | ||
485 | static struct file_operations input_devices_fileops = { | |
486 | .owner = THIS_MODULE, | |
487 | .open = input_proc_devices_open, | |
488 | .poll = input_proc_devices_poll, | |
489 | .read = seq_read, | |
490 | .llseek = seq_lseek, | |
491 | .release = seq_release, | |
492 | }; | |
493 | ||
494 | static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos) | |
495 | { | |
496 | /* acquire lock here ... Yes, we do need locking, I knowi, I know... */ | |
497 | seq->private = (void *)(unsigned long)*pos; | |
498 | return list_get_nth_element(&input_handler_list, pos); | |
499 | } | |
f96b434d | 500 | |
969b21cd DT |
501 | static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
502 | { | |
503 | seq->private = (void *)(unsigned long)(*pos + 1); | |
504 | return list_get_next_element(&input_handler_list, v, pos); | |
f96b434d DT |
505 | } |
506 | ||
969b21cd DT |
507 | static void input_handlers_seq_stop(struct seq_file *seq, void *v) |
508 | { | |
509 | /* release lock here */ | |
510 | } | |
511 | ||
512 | static int input_handlers_seq_show(struct seq_file *seq, void *v) | |
513 | { | |
514 | struct input_handler *handler = container_of(v, struct input_handler, node); | |
515 | ||
516 | seq_printf(seq, "N: Number=%ld Name=%s", | |
517 | (unsigned long)seq->private, handler->name); | |
518 | if (handler->fops) | |
519 | seq_printf(seq, " Minor=%d", handler->minor); | |
520 | seq_putc(seq, '\n'); | |
521 | ||
522 | return 0; | |
523 | } | |
524 | static struct seq_operations input_handlers_seq_ops = { | |
525 | .start = input_handlers_seq_start, | |
526 | .next = input_handlers_seq_next, | |
527 | .stop = input_handlers_seq_stop, | |
528 | .show = input_handlers_seq_show, | |
529 | }; | |
530 | ||
531 | static int input_proc_handlers_open(struct inode *inode, struct file *file) | |
532 | { | |
533 | return seq_open(file, &input_handlers_seq_ops); | |
534 | } | |
535 | ||
536 | static struct file_operations input_handlers_fileops = { | |
537 | .owner = THIS_MODULE, | |
538 | .open = input_proc_handlers_open, | |
539 | .read = seq_read, | |
540 | .llseek = seq_lseek, | |
541 | .release = seq_release, | |
542 | }; | |
f96b434d DT |
543 | |
544 | static int __init input_proc_init(void) | |
545 | { | |
546 | struct proc_dir_entry *entry; | |
547 | ||
548 | proc_bus_input_dir = proc_mkdir("input", proc_bus); | |
549 | if (!proc_bus_input_dir) | |
550 | return -ENOMEM; | |
551 | ||
552 | proc_bus_input_dir->owner = THIS_MODULE; | |
553 | ||
969b21cd | 554 | entry = create_proc_entry("devices", 0, proc_bus_input_dir); |
f96b434d DT |
555 | if (!entry) |
556 | goto fail1; | |
557 | ||
558 | entry->owner = THIS_MODULE; | |
969b21cd | 559 | entry->proc_fops = &input_devices_fileops; |
f96b434d | 560 | |
969b21cd | 561 | entry = create_proc_entry("handlers", 0, proc_bus_input_dir); |
f96b434d DT |
562 | if (!entry) |
563 | goto fail2; | |
564 | ||
565 | entry->owner = THIS_MODULE; | |
969b21cd | 566 | entry->proc_fops = &input_handlers_fileops; |
f96b434d DT |
567 | |
568 | return 0; | |
569 | ||
570 | fail2: remove_proc_entry("devices", proc_bus_input_dir); | |
571 | fail1: remove_proc_entry("input", proc_bus); | |
572 | return -ENOMEM; | |
573 | } | |
574 | ||
beffbdc2 | 575 | static void input_proc_exit(void) |
f96b434d DT |
576 | { |
577 | remove_proc_entry("devices", proc_bus_input_dir); | |
578 | remove_proc_entry("handlers", proc_bus_input_dir); | |
579 | remove_proc_entry("input", proc_bus); | |
580 | } | |
581 | ||
582 | #else /* !CONFIG_PROC_FS */ | |
583 | static inline void input_wakeup_procfs_readers(void) { } | |
584 | static inline int input_proc_init(void) { return 0; } | |
585 | static inline void input_proc_exit(void) { } | |
586 | #endif | |
587 | ||
5c1e9a6a DT |
588 | #define INPUT_DEV_STRING_ATTR_SHOW(name) \ |
589 | static ssize_t input_dev_show_##name(struct class_device *dev, char *buf) \ | |
590 | { \ | |
591 | struct input_dev *input_dev = to_input_dev(dev); \ | |
592 | int retval; \ | |
593 | \ | |
e676c232 | 594 | retval = mutex_lock_interruptible(&input_dev->mutex); \ |
5c1e9a6a DT |
595 | if (retval) \ |
596 | return retval; \ | |
597 | \ | |
2db66876 DT |
598 | retval = scnprintf(buf, PAGE_SIZE, \ |
599 | "%s\n", input_dev->name ? input_dev->name : ""); \ | |
5c1e9a6a | 600 | \ |
e676c232 | 601 | mutex_unlock(&input_dev->mutex); \ |
5c1e9a6a DT |
602 | \ |
603 | return retval; \ | |
629b77a4 GKH |
604 | } \ |
605 | static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL); | |
5c1e9a6a DT |
606 | |
607 | INPUT_DEV_STRING_ATTR_SHOW(name); | |
608 | INPUT_DEV_STRING_ATTR_SHOW(phys); | |
609 | INPUT_DEV_STRING_ATTR_SHOW(uniq); | |
610 | ||
ac648a6a DT |
611 | static int input_print_modalias_bits(char *buf, int size, |
612 | char name, unsigned long *bm, | |
613 | unsigned int min_bit, unsigned int max_bit) | |
1d8f430c | 614 | { |
ac648a6a | 615 | int len = 0, i; |
1d8f430c | 616 | |
ac648a6a DT |
617 | len += snprintf(buf, max(size, 0), "%c", name); |
618 | for (i = min_bit; i < max_bit; i++) | |
619 | if (bm[LONG(i)] & BIT(i)) | |
620 | len += snprintf(buf + len, max(size - len, 0), "%X,", i); | |
1d8f430c RR |
621 | return len; |
622 | } | |
623 | ||
2db66876 DT |
624 | static int input_print_modalias(char *buf, int size, struct input_dev *id, |
625 | int add_cr) | |
1d8f430c | 626 | { |
bd37e5a9 | 627 | int len; |
1d8f430c | 628 | |
ac648a6a DT |
629 | len = snprintf(buf, max(size, 0), |
630 | "input:b%04Xv%04Xp%04Xe%04X-", | |
631 | id->id.bustype, id->id.vendor, | |
632 | id->id.product, id->id.version); | |
633 | ||
634 | len += input_print_modalias_bits(buf + len, size - len, | |
635 | 'e', id->evbit, 0, EV_MAX); | |
636 | len += input_print_modalias_bits(buf + len, size - len, | |
637 | 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX); | |
638 | len += input_print_modalias_bits(buf + len, size - len, | |
639 | 'r', id->relbit, 0, REL_MAX); | |
640 | len += input_print_modalias_bits(buf + len, size - len, | |
641 | 'a', id->absbit, 0, ABS_MAX); | |
642 | len += input_print_modalias_bits(buf + len, size - len, | |
643 | 'm', id->mscbit, 0, MSC_MAX); | |
644 | len += input_print_modalias_bits(buf + len, size - len, | |
645 | 'l', id->ledbit, 0, LED_MAX); | |
646 | len += input_print_modalias_bits(buf + len, size - len, | |
647 | 's', id->sndbit, 0, SND_MAX); | |
648 | len += input_print_modalias_bits(buf + len, size - len, | |
649 | 'f', id->ffbit, 0, FF_MAX); | |
650 | len += input_print_modalias_bits(buf + len, size - len, | |
651 | 'w', id->swbit, 0, SW_MAX); | |
2db66876 DT |
652 | |
653 | if (add_cr) | |
ac648a6a | 654 | len += snprintf(buf + len, max(size - len, 0), "\n"); |
2db66876 | 655 | |
bd37e5a9 KS |
656 | return len; |
657 | } | |
658 | ||
659 | static ssize_t input_dev_show_modalias(struct class_device *dev, char *buf) | |
660 | { | |
661 | struct input_dev *id = to_input_dev(dev); | |
662 | ssize_t len; | |
663 | ||
2db66876 DT |
664 | len = input_print_modalias(buf, PAGE_SIZE, id, 1); |
665 | ||
8a3cf456 | 666 | return min_t(int, len, PAGE_SIZE); |
1d8f430c RR |
667 | } |
668 | static CLASS_DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL); | |
669 | ||
629b77a4 GKH |
670 | static struct attribute *input_dev_attrs[] = { |
671 | &class_device_attr_name.attr, | |
672 | &class_device_attr_phys.attr, | |
673 | &class_device_attr_uniq.attr, | |
1d8f430c | 674 | &class_device_attr_modalias.attr, |
629b77a4 GKH |
675 | NULL |
676 | }; | |
677 | ||
bd0ef235 | 678 | static struct attribute_group input_dev_attr_group = { |
629b77a4 | 679 | .attrs = input_dev_attrs, |
5c1e9a6a DT |
680 | }; |
681 | ||
682 | #define INPUT_DEV_ID_ATTR(name) \ | |
683 | static ssize_t input_dev_show_id_##name(struct class_device *dev, char *buf) \ | |
684 | { \ | |
685 | struct input_dev *input_dev = to_input_dev(dev); \ | |
2db66876 | 686 | return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \ |
5c1e9a6a DT |
687 | } \ |
688 | static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL); | |
689 | ||
690 | INPUT_DEV_ID_ATTR(bustype); | |
691 | INPUT_DEV_ID_ATTR(vendor); | |
692 | INPUT_DEV_ID_ATTR(product); | |
693 | INPUT_DEV_ID_ATTR(version); | |
694 | ||
695 | static struct attribute *input_dev_id_attrs[] = { | |
696 | &class_device_attr_bustype.attr, | |
697 | &class_device_attr_vendor.attr, | |
698 | &class_device_attr_product.attr, | |
699 | &class_device_attr_version.attr, | |
700 | NULL | |
701 | }; | |
702 | ||
703 | static struct attribute_group input_dev_id_attr_group = { | |
704 | .name = "id", | |
705 | .attrs = input_dev_id_attrs, | |
706 | }; | |
707 | ||
969b21cd DT |
708 | static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap, |
709 | int max, int add_cr) | |
710 | { | |
711 | int i; | |
712 | int len = 0; | |
713 | ||
714 | for (i = NBITS(max) - 1; i > 0; i--) | |
715 | if (bitmap[i]) | |
716 | break; | |
717 | ||
718 | for (; i >= 0; i--) | |
719 | len += snprintf(buf + len, max(buf_size - len, 0), | |
720 | "%lx%s", bitmap[i], i > 0 ? " " : ""); | |
721 | ||
722 | if (add_cr) | |
723 | len += snprintf(buf + len, max(buf_size - len, 0), "\n"); | |
724 | ||
725 | return len; | |
726 | } | |
727 | ||
5c1e9a6a DT |
728 | #define INPUT_DEV_CAP_ATTR(ev, bm) \ |
729 | static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf) \ | |
730 | { \ | |
731 | struct input_dev *input_dev = to_input_dev(dev); \ | |
2db66876 DT |
732 | int len = input_print_bitmap(buf, PAGE_SIZE, \ |
733 | input_dev->bm##bit, ev##_MAX, 1); \ | |
734 | return min_t(int, len, PAGE_SIZE); \ | |
5c1e9a6a DT |
735 | } \ |
736 | static CLASS_DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL); | |
737 | ||
738 | INPUT_DEV_CAP_ATTR(EV, ev); | |
739 | INPUT_DEV_CAP_ATTR(KEY, key); | |
740 | INPUT_DEV_CAP_ATTR(REL, rel); | |
741 | INPUT_DEV_CAP_ATTR(ABS, abs); | |
742 | INPUT_DEV_CAP_ATTR(MSC, msc); | |
743 | INPUT_DEV_CAP_ATTR(LED, led); | |
744 | INPUT_DEV_CAP_ATTR(SND, snd); | |
745 | INPUT_DEV_CAP_ATTR(FF, ff); | |
746 | INPUT_DEV_CAP_ATTR(SW, sw); | |
747 | ||
748 | static struct attribute *input_dev_caps_attrs[] = { | |
749 | &class_device_attr_ev.attr, | |
750 | &class_device_attr_key.attr, | |
751 | &class_device_attr_rel.attr, | |
752 | &class_device_attr_abs.attr, | |
753 | &class_device_attr_msc.attr, | |
754 | &class_device_attr_led.attr, | |
755 | &class_device_attr_snd.attr, | |
756 | &class_device_attr_ff.attr, | |
757 | &class_device_attr_sw.attr, | |
758 | NULL | |
759 | }; | |
760 | ||
761 | static struct attribute_group input_dev_caps_attr_group = { | |
762 | .name = "capabilities", | |
763 | .attrs = input_dev_caps_attrs, | |
764 | }; | |
765 | ||
d19fbe8a DT |
766 | static void input_dev_release(struct class_device *class_dev) |
767 | { | |
768 | struct input_dev *dev = to_input_dev(class_dev); | |
769 | ||
509ca1a9 | 770 | input_ff_destroy(dev); |
d19fbe8a | 771 | kfree(dev); |
509ca1a9 | 772 | |
d19fbe8a DT |
773 | module_put(THIS_MODULE); |
774 | } | |
775 | ||
a7fadbe1 | 776 | /* |
312c004d | 777 | * Input uevent interface - loading event handlers based on |
a7fadbe1 DT |
778 | * device bitfields. |
779 | */ | |
312c004d | 780 | static int input_add_uevent_bm_var(char **envp, int num_envp, int *cur_index, |
ac648a6a DT |
781 | char *buffer, int buffer_size, int *cur_len, |
782 | const char *name, unsigned long *bitmap, int max) | |
a7fadbe1 DT |
783 | { |
784 | if (*cur_index >= num_envp - 1) | |
785 | return -ENOMEM; | |
786 | ||
787 | envp[*cur_index] = buffer + *cur_len; | |
788 | ||
789 | *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), name); | |
ac648a6a | 790 | if (*cur_len >= buffer_size) |
a7fadbe1 DT |
791 | return -ENOMEM; |
792 | ||
793 | *cur_len += input_print_bitmap(buffer + *cur_len, | |
794 | max(buffer_size - *cur_len, 0), | |
2db66876 | 795 | bitmap, max, 0) + 1; |
a7fadbe1 DT |
796 | if (*cur_len > buffer_size) |
797 | return -ENOMEM; | |
798 | ||
799 | (*cur_index)++; | |
800 | return 0; | |
801 | } | |
802 | ||
ac648a6a DT |
803 | static int input_add_uevent_modalias_var(char **envp, int num_envp, int *cur_index, |
804 | char *buffer, int buffer_size, int *cur_len, | |
805 | struct input_dev *dev) | |
806 | { | |
807 | if (*cur_index >= num_envp - 1) | |
808 | return -ENOMEM; | |
809 | ||
810 | envp[*cur_index] = buffer + *cur_len; | |
811 | ||
812 | *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), | |
813 | "MODALIAS="); | |
814 | if (*cur_len >= buffer_size) | |
815 | return -ENOMEM; | |
816 | ||
817 | *cur_len += input_print_modalias(buffer + *cur_len, | |
818 | max(buffer_size - *cur_len, 0), | |
819 | dev, 0) + 1; | |
820 | if (*cur_len > buffer_size) | |
821 | return -ENOMEM; | |
822 | ||
823 | (*cur_index)++; | |
824 | return 0; | |
825 | } | |
826 | ||
a7fadbe1 DT |
827 | #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \ |
828 | do { \ | |
ac648a6a | 829 | int err = add_uevent_var(envp, num_envp, &i, \ |
a7fadbe1 DT |
830 | buffer, buffer_size, &len, \ |
831 | fmt, val); \ | |
832 | if (err) \ | |
833 | return err; \ | |
834 | } while (0) | |
835 | ||
836 | #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \ | |
837 | do { \ | |
312c004d | 838 | int err = input_add_uevent_bm_var(envp, num_envp, &i, \ |
a7fadbe1 DT |
839 | buffer, buffer_size, &len, \ |
840 | name, bm, max); \ | |
841 | if (err) \ | |
842 | return err; \ | |
843 | } while (0) | |
844 | ||
ac648a6a DT |
845 | #define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev) \ |
846 | do { \ | |
847 | int err = input_add_uevent_modalias_var(envp, \ | |
848 | num_envp, &i, \ | |
849 | buffer, buffer_size, &len, \ | |
850 | dev); \ | |
851 | if (err) \ | |
852 | return err; \ | |
853 | } while (0) | |
854 | ||
312c004d KS |
855 | static int input_dev_uevent(struct class_device *cdev, char **envp, |
856 | int num_envp, char *buffer, int buffer_size) | |
a7fadbe1 DT |
857 | { |
858 | struct input_dev *dev = to_input_dev(cdev); | |
859 | int i = 0; | |
860 | int len = 0; | |
861 | ||
862 | INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x", | |
863 | dev->id.bustype, dev->id.vendor, | |
864 | dev->id.product, dev->id.version); | |
865 | if (dev->name) | |
866 | INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name); | |
867 | if (dev->phys) | |
868 | INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys); | |
08de1f04 | 869 | if (dev->uniq) |
a7fadbe1 DT |
870 | INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq); |
871 | ||
872 | INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX); | |
873 | if (test_bit(EV_KEY, dev->evbit)) | |
874 | INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX); | |
875 | if (test_bit(EV_REL, dev->evbit)) | |
876 | INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX); | |
877 | if (test_bit(EV_ABS, dev->evbit)) | |
878 | INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX); | |
879 | if (test_bit(EV_MSC, dev->evbit)) | |
880 | INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX); | |
881 | if (test_bit(EV_LED, dev->evbit)) | |
882 | INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX); | |
883 | if (test_bit(EV_SND, dev->evbit)) | |
884 | INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX); | |
885 | if (test_bit(EV_FF, dev->evbit)) | |
886 | INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX); | |
887 | if (test_bit(EV_SW, dev->evbit)) | |
888 | INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX); | |
889 | ||
ac648a6a | 890 | INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev); |
a7fadbe1 | 891 | |
bd37e5a9 | 892 | envp[i] = NULL; |
a7fadbe1 DT |
893 | return 0; |
894 | } | |
895 | ||
ea9f240b GKH |
896 | struct class input_class = { |
897 | .name = "input", | |
d19fbe8a | 898 | .release = input_dev_release, |
312c004d | 899 | .uevent = input_dev_uevent, |
d19fbe8a | 900 | }; |
ca56fe07 | 901 | EXPORT_SYMBOL_GPL(input_class); |
d19fbe8a | 902 | |
1447190e DT |
903 | /** |
904 | * input_allocate_device - allocate memory for new input device | |
905 | * | |
906 | * Returns prepared struct input_dev or NULL. | |
907 | * | |
908 | * NOTE: Use input_free_device() to free devices that have not been | |
909 | * registered; input_unregister_device() should be used for already | |
910 | * registered devices. | |
911 | */ | |
d19fbe8a DT |
912 | struct input_dev *input_allocate_device(void) |
913 | { | |
914 | struct input_dev *dev; | |
915 | ||
916 | dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL); | |
917 | if (dev) { | |
ea9f240b | 918 | dev->cdev.class = &input_class; |
d19fbe8a | 919 | class_device_initialize(&dev->cdev); |
f60d2b11 | 920 | mutex_init(&dev->mutex); |
d19fbe8a DT |
921 | INIT_LIST_HEAD(&dev->h_list); |
922 | INIT_LIST_HEAD(&dev->node); | |
655816e4 DT |
923 | |
924 | __module_get(THIS_MODULE); | |
d19fbe8a DT |
925 | } |
926 | ||
927 | return dev; | |
928 | } | |
ca56fe07 | 929 | EXPORT_SYMBOL(input_allocate_device); |
d19fbe8a | 930 | |
1447190e DT |
931 | /** |
932 | * input_free_device - free memory occupied by input_dev structure | |
933 | * @dev: input device to free | |
934 | * | |
935 | * This function should only be used if input_register_device() | |
936 | * was not called yet or if it failed. Once device was registered | |
937 | * use input_unregister_device() and memory will be freed once last | |
938 | * refrence to the device is dropped. | |
939 | * | |
940 | * Device should be allocated by input_allocate_device(). | |
941 | * | |
942 | * NOTE: If there are references to the input device then memory | |
943 | * will not be freed until last reference is dropped. | |
944 | */ | |
f60d2b11 DT |
945 | void input_free_device(struct input_dev *dev) |
946 | { | |
947 | if (dev) { | |
948 | ||
949 | mutex_lock(&dev->mutex); | |
950 | dev->name = dev->phys = dev->uniq = NULL; | |
951 | mutex_unlock(&dev->mutex); | |
952 | ||
953 | input_put_device(dev); | |
954 | } | |
955 | } | |
ca56fe07 | 956 | EXPORT_SYMBOL(input_free_device); |
f60d2b11 | 957 | |
5f945489 | 958 | int input_register_device(struct input_dev *dev) |
1da177e4 | 959 | { |
bd0ef235 | 960 | static atomic_t input_no = ATOMIC_INIT(0); |
1da177e4 LT |
961 | struct input_handle *handle; |
962 | struct input_handler *handler; | |
66e66118 | 963 | const struct input_device_id *id; |
bd0ef235 DT |
964 | const char *path; |
965 | int error; | |
1da177e4 | 966 | |
5f945489 | 967 | set_bit(EV_SYN, dev->evbit); |
0fbf87ca | 968 | |
1da177e4 LT |
969 | /* |
970 | * If delay and period are pre-set by the driver, then autorepeating | |
971 | * is handled by the driver itself and we don't do it in input.c. | |
972 | */ | |
973 | ||
974 | init_timer(&dev->timer); | |
975 | if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) { | |
976 | dev->timer.data = (long) dev; | |
977 | dev->timer.function = input_repeat_key; | |
978 | dev->rep[REP_DELAY] = 250; | |
979 | dev->rep[REP_PERIOD] = 33; | |
980 | } | |
981 | ||
1da177e4 LT |
982 | list_add_tail(&dev->node, &input_dev_list); |
983 | ||
bd0ef235 DT |
984 | snprintf(dev->cdev.class_id, sizeof(dev->cdev.class_id), |
985 | "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1); | |
986 | ||
987 | error = class_device_add(&dev->cdev); | |
988 | if (error) | |
989 | return error; | |
990 | ||
991 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_attr_group); | |
992 | if (error) | |
993 | goto fail1; | |
994 | ||
995 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_id_attr_group); | |
996 | if (error) | |
997 | goto fail2; | |
998 | ||
999 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_caps_attr_group); | |
1000 | if (error) | |
1001 | goto fail3; | |
1002 | ||
bd0ef235 DT |
1003 | path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL); |
1004 | printk(KERN_INFO "input: %s as %s\n", | |
1005 | dev->name ? dev->name : "Unspecified device", path ? path : "N/A"); | |
1006 | kfree(path); | |
10204020 | 1007 | |
1da177e4 LT |
1008 | list_for_each_entry(handler, &input_handler_list, node) |
1009 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) | |
1010 | if ((id = input_match_device(handler->id_table, dev))) | |
c7e8dc6e | 1011 | if ((handle = handler->connect(handler, dev, id))) { |
1da177e4 | 1012 | input_link_handle(handle); |
c7e8dc6e DT |
1013 | if (handler->start) |
1014 | handler->start(handle); | |
1015 | } | |
1da177e4 | 1016 | |
f96b434d | 1017 | input_wakeup_procfs_readers(); |
5f945489 DT |
1018 | |
1019 | return 0; | |
bd0ef235 DT |
1020 | |
1021 | fail3: sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group); | |
1022 | fail2: sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group); | |
1023 | fail1: class_device_del(&dev->cdev); | |
1024 | return error; | |
1da177e4 | 1025 | } |
ca56fe07 | 1026 | EXPORT_SYMBOL(input_register_device); |
1da177e4 LT |
1027 | |
1028 | void input_unregister_device(struct input_dev *dev) | |
1029 | { | |
1e0afb28 | 1030 | struct list_head *node, *next; |
6d2750c1 | 1031 | int code; |
1da177e4 | 1032 | |
6d2750c1 DT |
1033 | for (code = 0; code <= KEY_MAX; code++) |
1034 | if (test_bit(code, dev->key)) | |
1035 | input_report_key(dev, code, 0); | |
1036 | input_sync(dev); | |
1da177e4 LT |
1037 | |
1038 | del_timer_sync(&dev->timer); | |
1039 | ||
1040 | list_for_each_safe(node, next, &dev->h_list) { | |
1041 | struct input_handle * handle = to_handle(node); | |
1042 | list_del_init(&handle->d_node); | |
1043 | list_del_init(&handle->h_node); | |
1044 | handle->handler->disconnect(handle); | |
1045 | } | |
1046 | ||
1da177e4 LT |
1047 | list_del_init(&dev->node); |
1048 | ||
5f945489 DT |
1049 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group); |
1050 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group); | |
bd0ef235 | 1051 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group); |
d19fbe8a | 1052 | |
f60d2b11 DT |
1053 | mutex_lock(&dev->mutex); |
1054 | dev->name = dev->phys = dev->uniq = NULL; | |
1055 | mutex_unlock(&dev->mutex); | |
1056 | ||
e7374e48 DT |
1057 | class_device_unregister(&dev->cdev); |
1058 | ||
f96b434d | 1059 | input_wakeup_procfs_readers(); |
1da177e4 | 1060 | } |
ca56fe07 | 1061 | EXPORT_SYMBOL(input_unregister_device); |
1da177e4 | 1062 | |
4263cf0f | 1063 | int input_register_handler(struct input_handler *handler) |
1da177e4 LT |
1064 | { |
1065 | struct input_dev *dev; | |
1066 | struct input_handle *handle; | |
66e66118 | 1067 | const struct input_device_id *id; |
1da177e4 | 1068 | |
1da177e4 LT |
1069 | INIT_LIST_HEAD(&handler->h_list); |
1070 | ||
4263cf0f DT |
1071 | if (handler->fops != NULL) { |
1072 | if (input_table[handler->minor >> 5]) | |
1073 | return -EBUSY; | |
1074 | ||
1da177e4 | 1075 | input_table[handler->minor >> 5] = handler; |
4263cf0f | 1076 | } |
1da177e4 LT |
1077 | |
1078 | list_add_tail(&handler->node, &input_handler_list); | |
1079 | ||
1080 | list_for_each_entry(dev, &input_dev_list, node) | |
1081 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) | |
1082 | if ((id = input_match_device(handler->id_table, dev))) | |
b6d786db | 1083 | if ((handle = handler->connect(handler, dev, id))) { |
1da177e4 | 1084 | input_link_handle(handle); |
b6d786db DT |
1085 | if (handler->start) |
1086 | handler->start(handle); | |
1087 | } | |
1da177e4 | 1088 | |
f96b434d | 1089 | input_wakeup_procfs_readers(); |
4263cf0f | 1090 | return 0; |
1da177e4 | 1091 | } |
ca56fe07 | 1092 | EXPORT_SYMBOL(input_register_handler); |
1da177e4 LT |
1093 | |
1094 | void input_unregister_handler(struct input_handler *handler) | |
1095 | { | |
1e0afb28 | 1096 | struct list_head *node, *next; |
1da177e4 LT |
1097 | |
1098 | list_for_each_safe(node, next, &handler->h_list) { | |
1099 | struct input_handle * handle = to_handle_h(node); | |
1100 | list_del_init(&handle->h_node); | |
1101 | list_del_init(&handle->d_node); | |
1102 | handler->disconnect(handle); | |
1103 | } | |
1104 | ||
1105 | list_del_init(&handler->node); | |
1106 | ||
1107 | if (handler->fops != NULL) | |
1108 | input_table[handler->minor >> 5] = NULL; | |
1109 | ||
f96b434d | 1110 | input_wakeup_procfs_readers(); |
1da177e4 | 1111 | } |
ca56fe07 | 1112 | EXPORT_SYMBOL(input_unregister_handler); |
1da177e4 LT |
1113 | |
1114 | static int input_open_file(struct inode *inode, struct file *file) | |
1115 | { | |
1116 | struct input_handler *handler = input_table[iminor(inode) >> 5]; | |
99ac48f5 | 1117 | const struct file_operations *old_fops, *new_fops = NULL; |
1da177e4 LT |
1118 | int err; |
1119 | ||
1120 | /* No load-on-demand here? */ | |
1121 | if (!handler || !(new_fops = fops_get(handler->fops))) | |
1122 | return -ENODEV; | |
1123 | ||
1124 | /* | |
1125 | * That's _really_ odd. Usually NULL ->open means "nothing special", | |
1126 | * not "no device". Oh, well... | |
1127 | */ | |
1128 | if (!new_fops->open) { | |
1129 | fops_put(new_fops); | |
1130 | return -ENODEV; | |
1131 | } | |
1132 | old_fops = file->f_op; | |
1133 | file->f_op = new_fops; | |
1134 | ||
1135 | err = new_fops->open(inode, file); | |
1136 | ||
1137 | if (err) { | |
1138 | fops_put(file->f_op); | |
1139 | file->f_op = fops_get(old_fops); | |
1140 | } | |
1141 | fops_put(old_fops); | |
1142 | return err; | |
1143 | } | |
1144 | ||
1145 | static struct file_operations input_fops = { | |
1146 | .owner = THIS_MODULE, | |
1147 | .open = input_open_file, | |
1148 | }; | |
1149 | ||
f96b434d | 1150 | static int __init input_init(void) |
1da177e4 | 1151 | { |
f96b434d | 1152 | int err; |
1da177e4 | 1153 | |
ea9f240b | 1154 | err = class_register(&input_class); |
d19fbe8a DT |
1155 | if (err) { |
1156 | printk(KERN_ERR "input: unable to register input_dev class\n"); | |
1157 | return err; | |
1158 | } | |
1159 | ||
f96b434d DT |
1160 | err = input_proc_init(); |
1161 | if (err) | |
b0fdfebb | 1162 | goto fail1; |
1da177e4 | 1163 | |
f96b434d DT |
1164 | err = register_chrdev(INPUT_MAJOR, "input", &input_fops); |
1165 | if (err) { | |
1166 | printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR); | |
b0fdfebb | 1167 | goto fail2; |
1da177e4 | 1168 | } |
e334016f | 1169 | |
1da177e4 | 1170 | return 0; |
1da177e4 | 1171 | |
b0fdfebb | 1172 | fail2: input_proc_exit(); |
ea9f240b | 1173 | fail1: class_unregister(&input_class); |
f96b434d | 1174 | return err; |
1da177e4 LT |
1175 | } |
1176 | ||
1177 | static void __exit input_exit(void) | |
1178 | { | |
f96b434d | 1179 | input_proc_exit(); |
1da177e4 | 1180 | unregister_chrdev(INPUT_MAJOR, "input"); |
ea9f240b | 1181 | class_unregister(&input_class); |
1da177e4 LT |
1182 | } |
1183 | ||
1184 | subsys_initcall(input_init); | |
1185 | module_exit(input_exit); |