Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * The input core | |
3 | * | |
4 | * Copyright (c) 1999-2002 Vojtech Pavlik | |
5 | */ | |
6 | ||
7 | /* | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License version 2 as published by | |
10 | * the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <linux/init.h> | |
1da177e4 LT |
14 | #include <linux/smp_lock.h> |
15 | #include <linux/input.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/random.h> | |
18 | #include <linux/major.h> | |
19 | #include <linux/proc_fs.h> | |
969b21cd | 20 | #include <linux/seq_file.h> |
1da177e4 LT |
21 | #include <linux/interrupt.h> |
22 | #include <linux/poll.h> | |
23 | #include <linux/device.h> | |
e676c232 | 24 | #include <linux/mutex.h> |
1da177e4 LT |
25 | |
26 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); | |
27 | MODULE_DESCRIPTION("Input core"); | |
28 | MODULE_LICENSE("GPL"); | |
29 | ||
1da177e4 LT |
30 | #define INPUT_DEVICES 256 |
31 | ||
32 | static LIST_HEAD(input_dev_list); | |
33 | static LIST_HEAD(input_handler_list); | |
34 | ||
35 | static struct input_handler *input_table[8]; | |
36 | ||
0e739d28 DT |
37 | /** |
38 | * input_event() - report new input event | |
1447190e | 39 | * @dev: device that generated the event |
0e739d28 DT |
40 | * @type: type of the event |
41 | * @code: event code | |
42 | * @value: value of the event | |
43 | * | |
44 | * This function should be used by drivers implementing various input devices | |
45 | * See also input_inject_event() | |
46 | */ | |
1da177e4 LT |
47 | void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) |
48 | { | |
49 | struct input_handle *handle; | |
50 | ||
51 | if (type > EV_MAX || !test_bit(type, dev->evbit)) | |
52 | return; | |
53 | ||
54 | add_input_randomness(type, code, value); | |
55 | ||
56 | switch (type) { | |
57 | ||
58 | case EV_SYN: | |
59 | switch (code) { | |
60 | case SYN_CONFIG: | |
1e0afb28 DT |
61 | if (dev->event) |
62 | dev->event(dev, type, code, value); | |
1da177e4 LT |
63 | break; |
64 | ||
65 | case SYN_REPORT: | |
1e0afb28 DT |
66 | if (dev->sync) |
67 | return; | |
1da177e4 LT |
68 | dev->sync = 1; |
69 | break; | |
70 | } | |
71 | break; | |
72 | ||
73 | case EV_KEY: | |
74 | ||
75 | if (code > KEY_MAX || !test_bit(code, dev->keybit) || !!test_bit(code, dev->key) == value) | |
76 | return; | |
77 | ||
78 | if (value == 2) | |
79 | break; | |
80 | ||
81 | change_bit(code, dev->key); | |
82 | ||
83 | if (test_bit(EV_REP, dev->evbit) && dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && dev->timer.data && value) { | |
84 | dev->repeat_key = code; | |
85 | mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_DELAY])); | |
86 | } | |
87 | ||
88 | break; | |
89 | ||
31581066 RP |
90 | case EV_SW: |
91 | ||
92 | if (code > SW_MAX || !test_bit(code, dev->swbit) || !!test_bit(code, dev->sw) == value) | |
93 | return; | |
94 | ||
95 | change_bit(code, dev->sw); | |
96 | ||
97 | break; | |
98 | ||
1da177e4 LT |
99 | case EV_ABS: |
100 | ||
101 | if (code > ABS_MAX || !test_bit(code, dev->absbit)) | |
102 | return; | |
103 | ||
104 | if (dev->absfuzz[code]) { | |
105 | if ((value > dev->abs[code] - (dev->absfuzz[code] >> 1)) && | |
106 | (value < dev->abs[code] + (dev->absfuzz[code] >> 1))) | |
107 | return; | |
108 | ||
109 | if ((value > dev->abs[code] - dev->absfuzz[code]) && | |
110 | (value < dev->abs[code] + dev->absfuzz[code])) | |
111 | value = (dev->abs[code] * 3 + value) >> 2; | |
112 | ||
113 | if ((value > dev->abs[code] - (dev->absfuzz[code] << 1)) && | |
114 | (value < dev->abs[code] + (dev->absfuzz[code] << 1))) | |
115 | value = (dev->abs[code] + value) >> 1; | |
116 | } | |
117 | ||
118 | if (dev->abs[code] == value) | |
119 | return; | |
120 | ||
121 | dev->abs[code] = value; | |
122 | break; | |
123 | ||
124 | case EV_REL: | |
125 | ||
126 | if (code > REL_MAX || !test_bit(code, dev->relbit) || (value == 0)) | |
127 | return; | |
128 | ||
129 | break; | |
130 | ||
131 | case EV_MSC: | |
132 | ||
133 | if (code > MSC_MAX || !test_bit(code, dev->mscbit)) | |
134 | return; | |
135 | ||
1e0afb28 DT |
136 | if (dev->event) |
137 | dev->event(dev, type, code, value); | |
1da177e4 LT |
138 | |
139 | break; | |
140 | ||
141 | case EV_LED: | |
142 | ||
143 | if (code > LED_MAX || !test_bit(code, dev->ledbit) || !!test_bit(code, dev->led) == value) | |
144 | return; | |
145 | ||
146 | change_bit(code, dev->led); | |
1e0afb28 DT |
147 | |
148 | if (dev->event) | |
149 | dev->event(dev, type, code, value); | |
1da177e4 LT |
150 | |
151 | break; | |
152 | ||
153 | case EV_SND: | |
154 | ||
155 | if (code > SND_MAX || !test_bit(code, dev->sndbit)) | |
156 | return; | |
157 | ||
8fdc1948 DT |
158 | if (!!test_bit(code, dev->snd) != !!value) |
159 | change_bit(code, dev->snd); | |
160 | ||
1e0afb28 DT |
161 | if (dev->event) |
162 | dev->event(dev, type, code, value); | |
1da177e4 LT |
163 | |
164 | break; | |
165 | ||
166 | case EV_REP: | |
167 | ||
1e0afb28 DT |
168 | if (code > REP_MAX || value < 0 || dev->rep[code] == value) |
169 | return; | |
1da177e4 LT |
170 | |
171 | dev->rep[code] = value; | |
1e0afb28 DT |
172 | if (dev->event) |
173 | dev->event(dev, type, code, value); | |
1da177e4 LT |
174 | |
175 | break; | |
176 | ||
177 | case EV_FF: | |
509ca1a9 AH |
178 | |
179 | if (value < 0) | |
180 | return; | |
181 | ||
1e0afb28 DT |
182 | if (dev->event) |
183 | dev->event(dev, type, code, value); | |
1da177e4 LT |
184 | break; |
185 | } | |
186 | ||
187 | if (type != EV_SYN) | |
188 | dev->sync = 0; | |
189 | ||
190 | if (dev->grab) | |
191 | dev->grab->handler->event(dev->grab, type, code, value); | |
192 | else | |
193 | list_for_each_entry(handle, &dev->h_list, d_node) | |
194 | if (handle->open) | |
195 | handle->handler->event(handle, type, code, value); | |
196 | } | |
ca56fe07 | 197 | EXPORT_SYMBOL(input_event); |
1da177e4 | 198 | |
0e739d28 DT |
199 | /** |
200 | * input_inject_event() - send input event from input handler | |
201 | * @handle: input handle to send event through | |
202 | * @type: type of the event | |
203 | * @code: event code | |
204 | * @value: value of the event | |
205 | * | |
206 | * Similar to input_event() but will ignore event if device is "grabbed" and handle | |
207 | * injecting event is not the one that owns the device. | |
208 | */ | |
209 | void input_inject_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) | |
210 | { | |
211 | if (!handle->dev->grab || handle->dev->grab == handle) | |
212 | input_event(handle->dev, type, code, value); | |
213 | } | |
214 | EXPORT_SYMBOL(input_inject_event); | |
215 | ||
1da177e4 LT |
216 | static void input_repeat_key(unsigned long data) |
217 | { | |
218 | struct input_dev *dev = (void *) data; | |
219 | ||
220 | if (!test_bit(dev->repeat_key, dev->key)) | |
221 | return; | |
222 | ||
223 | input_event(dev, EV_KEY, dev->repeat_key, 2); | |
224 | input_sync(dev); | |
225 | ||
226 | if (dev->rep[REP_PERIOD]) | |
227 | mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_PERIOD])); | |
228 | } | |
229 | ||
1da177e4 LT |
230 | int input_grab_device(struct input_handle *handle) |
231 | { | |
232 | if (handle->dev->grab) | |
233 | return -EBUSY; | |
234 | ||
235 | handle->dev->grab = handle; | |
236 | return 0; | |
237 | } | |
ca56fe07 | 238 | EXPORT_SYMBOL(input_grab_device); |
1da177e4 LT |
239 | |
240 | void input_release_device(struct input_handle *handle) | |
241 | { | |
a2b2ed2c | 242 | struct input_dev *dev = handle->dev; |
c7e8dc6e | 243 | |
a2b2ed2c AM |
244 | if (dev->grab == handle) { |
245 | dev->grab = NULL; | |
246 | ||
247 | list_for_each_entry(handle, &dev->h_list, d_node) | |
c7e8dc6e DT |
248 | if (handle->handler->start) |
249 | handle->handler->start(handle); | |
250 | } | |
1da177e4 | 251 | } |
ca56fe07 | 252 | EXPORT_SYMBOL(input_release_device); |
1da177e4 LT |
253 | |
254 | int input_open_device(struct input_handle *handle) | |
255 | { | |
0fbf87ca DT |
256 | struct input_dev *dev = handle->dev; |
257 | int err; | |
258 | ||
e676c232 | 259 | err = mutex_lock_interruptible(&dev->mutex); |
0fbf87ca DT |
260 | if (err) |
261 | return err; | |
262 | ||
1da177e4 | 263 | handle->open++; |
0fbf87ca DT |
264 | |
265 | if (!dev->users++ && dev->open) | |
266 | err = dev->open(dev); | |
267 | ||
268 | if (err) | |
269 | handle->open--; | |
270 | ||
e676c232 | 271 | mutex_unlock(&dev->mutex); |
0fbf87ca DT |
272 | |
273 | return err; | |
1da177e4 | 274 | } |
ca56fe07 | 275 | EXPORT_SYMBOL(input_open_device); |
1da177e4 LT |
276 | |
277 | int input_flush_device(struct input_handle* handle, struct file* file) | |
278 | { | |
279 | if (handle->dev->flush) | |
280 | return handle->dev->flush(handle->dev, file); | |
281 | ||
282 | return 0; | |
283 | } | |
ca56fe07 | 284 | EXPORT_SYMBOL(input_flush_device); |
1da177e4 LT |
285 | |
286 | void input_close_device(struct input_handle *handle) | |
287 | { | |
0fbf87ca DT |
288 | struct input_dev *dev = handle->dev; |
289 | ||
1da177e4 | 290 | input_release_device(handle); |
0fbf87ca | 291 | |
e676c232 | 292 | mutex_lock(&dev->mutex); |
0fbf87ca DT |
293 | |
294 | if (!--dev->users && dev->close) | |
295 | dev->close(dev); | |
1da177e4 | 296 | handle->open--; |
0fbf87ca | 297 | |
e676c232 | 298 | mutex_unlock(&dev->mutex); |
1da177e4 | 299 | } |
ca56fe07 | 300 | EXPORT_SYMBOL(input_close_device); |
1da177e4 LT |
301 | |
302 | static void input_link_handle(struct input_handle *handle) | |
303 | { | |
304 | list_add_tail(&handle->d_node, &handle->dev->h_list); | |
305 | list_add_tail(&handle->h_node, &handle->handler->h_list); | |
306 | } | |
307 | ||
308 | #define MATCH_BIT(bit, max) \ | |
309 | for (i = 0; i < NBITS(max); i++) \ | |
310 | if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \ | |
311 | break; \ | |
312 | if (i != NBITS(max)) \ | |
313 | continue; | |
314 | ||
66e66118 DT |
315 | static const struct input_device_id *input_match_device(const struct input_device_id *id, |
316 | struct input_dev *dev) | |
1da177e4 LT |
317 | { |
318 | int i; | |
319 | ||
320 | for (; id->flags || id->driver_info; id++) { | |
321 | ||
322 | if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) | |
ddc5d341 | 323 | if (id->bustype != dev->id.bustype) |
1da177e4 LT |
324 | continue; |
325 | ||
326 | if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) | |
ddc5d341 | 327 | if (id->vendor != dev->id.vendor) |
1da177e4 LT |
328 | continue; |
329 | ||
330 | if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) | |
ddc5d341 | 331 | if (id->product != dev->id.product) |
1da177e4 LT |
332 | continue; |
333 | ||
334 | if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) | |
ddc5d341 | 335 | if (id->version != dev->id.version) |
1da177e4 LT |
336 | continue; |
337 | ||
338 | MATCH_BIT(evbit, EV_MAX); | |
339 | MATCH_BIT(keybit, KEY_MAX); | |
340 | MATCH_BIT(relbit, REL_MAX); | |
341 | MATCH_BIT(absbit, ABS_MAX); | |
342 | MATCH_BIT(mscbit, MSC_MAX); | |
343 | MATCH_BIT(ledbit, LED_MAX); | |
344 | MATCH_BIT(sndbit, SND_MAX); | |
345 | MATCH_BIT(ffbit, FF_MAX); | |
ff13f98b | 346 | MATCH_BIT(swbit, SW_MAX); |
1da177e4 LT |
347 | |
348 | return id; | |
349 | } | |
350 | ||
351 | return NULL; | |
352 | } | |
353 | ||
f96b434d DT |
354 | #ifdef CONFIG_PROC_FS |
355 | ||
356 | static struct proc_dir_entry *proc_bus_input_dir; | |
357 | static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait); | |
358 | static int input_devices_state; | |
359 | ||
360 | static inline void input_wakeup_procfs_readers(void) | |
361 | { | |
362 | input_devices_state++; | |
363 | wake_up(&input_devices_poll_wait); | |
364 | } | |
365 | ||
969b21cd | 366 | static unsigned int input_proc_devices_poll(struct file *file, poll_table *wait) |
f96b434d DT |
367 | { |
368 | int state = input_devices_state; | |
1e0afb28 | 369 | |
f96b434d DT |
370 | poll_wait(file, &input_devices_poll_wait, wait); |
371 | if (state != input_devices_state) | |
372 | return POLLIN | POLLRDNORM; | |
1e0afb28 | 373 | |
f96b434d DT |
374 | return 0; |
375 | } | |
376 | ||
969b21cd DT |
377 | static struct list_head *list_get_nth_element(struct list_head *list, loff_t *pos) |
378 | { | |
379 | struct list_head *node; | |
380 | loff_t i = 0; | |
f96b434d | 381 | |
969b21cd DT |
382 | list_for_each(node, list) |
383 | if (i++ == *pos) | |
384 | return node; | |
385 | ||
386 | return NULL; | |
387 | } | |
f96b434d | 388 | |
969b21cd | 389 | static struct list_head *list_get_next_element(struct list_head *list, struct list_head *element, loff_t *pos) |
f96b434d | 390 | { |
969b21cd DT |
391 | if (element->next == list) |
392 | return NULL; | |
f96b434d | 393 | |
969b21cd DT |
394 | ++(*pos); |
395 | return element->next; | |
396 | } | |
f96b434d | 397 | |
969b21cd DT |
398 | static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos) |
399 | { | |
400 | /* acquire lock here ... Yes, we do need locking, I knowi, I know... */ | |
f96b434d | 401 | |
969b21cd DT |
402 | return list_get_nth_element(&input_dev_list, pos); |
403 | } | |
051b2fea | 404 | |
969b21cd DT |
405 | static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
406 | { | |
407 | return list_get_next_element(&input_dev_list, v, pos); | |
408 | } | |
f96b434d | 409 | |
969b21cd DT |
410 | static void input_devices_seq_stop(struct seq_file *seq, void *v) |
411 | { | |
412 | /* release lock here */ | |
413 | } | |
f96b434d | 414 | |
969b21cd DT |
415 | static void input_seq_print_bitmap(struct seq_file *seq, const char *name, |
416 | unsigned long *bitmap, int max) | |
417 | { | |
418 | int i; | |
051b2fea | 419 | |
969b21cd DT |
420 | for (i = NBITS(max) - 1; i > 0; i--) |
421 | if (bitmap[i]) | |
422 | break; | |
f96b434d | 423 | |
969b21cd DT |
424 | seq_printf(seq, "B: %s=", name); |
425 | for (; i >= 0; i--) | |
426 | seq_printf(seq, "%lx%s", bitmap[i], i > 0 ? " " : ""); | |
427 | seq_putc(seq, '\n'); | |
428 | } | |
f96b434d | 429 | |
969b21cd DT |
430 | static int input_devices_seq_show(struct seq_file *seq, void *v) |
431 | { | |
432 | struct input_dev *dev = container_of(v, struct input_dev, node); | |
433 | const char *path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL); | |
434 | struct input_handle *handle; | |
435 | ||
436 | seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n", | |
437 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); | |
438 | ||
439 | seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); | |
440 | seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : ""); | |
441 | seq_printf(seq, "S: Sysfs=%s\n", path ? path : ""); | |
442 | seq_printf(seq, "H: Handlers="); | |
443 | ||
444 | list_for_each_entry(handle, &dev->h_list, d_node) | |
445 | seq_printf(seq, "%s ", handle->name); | |
446 | seq_putc(seq, '\n'); | |
447 | ||
448 | input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX); | |
449 | if (test_bit(EV_KEY, dev->evbit)) | |
450 | input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX); | |
451 | if (test_bit(EV_REL, dev->evbit)) | |
452 | input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX); | |
453 | if (test_bit(EV_ABS, dev->evbit)) | |
454 | input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX); | |
455 | if (test_bit(EV_MSC, dev->evbit)) | |
456 | input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX); | |
457 | if (test_bit(EV_LED, dev->evbit)) | |
458 | input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX); | |
459 | if (test_bit(EV_SND, dev->evbit)) | |
460 | input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX); | |
461 | if (test_bit(EV_FF, dev->evbit)) | |
462 | input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX); | |
463 | if (test_bit(EV_SW, dev->evbit)) | |
464 | input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX); | |
465 | ||
466 | seq_putc(seq, '\n'); | |
467 | ||
468 | kfree(path); | |
469 | return 0; | |
f96b434d DT |
470 | } |
471 | ||
969b21cd DT |
472 | static struct seq_operations input_devices_seq_ops = { |
473 | .start = input_devices_seq_start, | |
474 | .next = input_devices_seq_next, | |
475 | .stop = input_devices_seq_stop, | |
476 | .show = input_devices_seq_show, | |
477 | }; | |
478 | ||
479 | static int input_proc_devices_open(struct inode *inode, struct file *file) | |
f96b434d | 480 | { |
969b21cd DT |
481 | return seq_open(file, &input_devices_seq_ops); |
482 | } | |
483 | ||
2b8693c0 | 484 | static const struct file_operations input_devices_fileops = { |
969b21cd DT |
485 | .owner = THIS_MODULE, |
486 | .open = input_proc_devices_open, | |
487 | .poll = input_proc_devices_poll, | |
488 | .read = seq_read, | |
489 | .llseek = seq_lseek, | |
490 | .release = seq_release, | |
491 | }; | |
492 | ||
493 | static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos) | |
494 | { | |
495 | /* acquire lock here ... Yes, we do need locking, I knowi, I know... */ | |
496 | seq->private = (void *)(unsigned long)*pos; | |
497 | return list_get_nth_element(&input_handler_list, pos); | |
498 | } | |
f96b434d | 499 | |
969b21cd DT |
500 | static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
501 | { | |
502 | seq->private = (void *)(unsigned long)(*pos + 1); | |
503 | return list_get_next_element(&input_handler_list, v, pos); | |
f96b434d DT |
504 | } |
505 | ||
969b21cd DT |
506 | static void input_handlers_seq_stop(struct seq_file *seq, void *v) |
507 | { | |
508 | /* release lock here */ | |
509 | } | |
510 | ||
511 | static int input_handlers_seq_show(struct seq_file *seq, void *v) | |
512 | { | |
513 | struct input_handler *handler = container_of(v, struct input_handler, node); | |
514 | ||
515 | seq_printf(seq, "N: Number=%ld Name=%s", | |
516 | (unsigned long)seq->private, handler->name); | |
517 | if (handler->fops) | |
518 | seq_printf(seq, " Minor=%d", handler->minor); | |
519 | seq_putc(seq, '\n'); | |
520 | ||
521 | return 0; | |
522 | } | |
523 | static struct seq_operations input_handlers_seq_ops = { | |
524 | .start = input_handlers_seq_start, | |
525 | .next = input_handlers_seq_next, | |
526 | .stop = input_handlers_seq_stop, | |
527 | .show = input_handlers_seq_show, | |
528 | }; | |
529 | ||
530 | static int input_proc_handlers_open(struct inode *inode, struct file *file) | |
531 | { | |
532 | return seq_open(file, &input_handlers_seq_ops); | |
533 | } | |
534 | ||
2b8693c0 | 535 | static const struct file_operations input_handlers_fileops = { |
969b21cd DT |
536 | .owner = THIS_MODULE, |
537 | .open = input_proc_handlers_open, | |
538 | .read = seq_read, | |
539 | .llseek = seq_lseek, | |
540 | .release = seq_release, | |
541 | }; | |
f96b434d DT |
542 | |
543 | static int __init input_proc_init(void) | |
544 | { | |
545 | struct proc_dir_entry *entry; | |
546 | ||
547 | proc_bus_input_dir = proc_mkdir("input", proc_bus); | |
548 | if (!proc_bus_input_dir) | |
549 | return -ENOMEM; | |
550 | ||
551 | proc_bus_input_dir->owner = THIS_MODULE; | |
552 | ||
969b21cd | 553 | entry = create_proc_entry("devices", 0, proc_bus_input_dir); |
f96b434d DT |
554 | if (!entry) |
555 | goto fail1; | |
556 | ||
557 | entry->owner = THIS_MODULE; | |
969b21cd | 558 | entry->proc_fops = &input_devices_fileops; |
f96b434d | 559 | |
969b21cd | 560 | entry = create_proc_entry("handlers", 0, proc_bus_input_dir); |
f96b434d DT |
561 | if (!entry) |
562 | goto fail2; | |
563 | ||
564 | entry->owner = THIS_MODULE; | |
969b21cd | 565 | entry->proc_fops = &input_handlers_fileops; |
f96b434d DT |
566 | |
567 | return 0; | |
568 | ||
569 | fail2: remove_proc_entry("devices", proc_bus_input_dir); | |
570 | fail1: remove_proc_entry("input", proc_bus); | |
571 | return -ENOMEM; | |
572 | } | |
573 | ||
beffbdc2 | 574 | static void input_proc_exit(void) |
f96b434d DT |
575 | { |
576 | remove_proc_entry("devices", proc_bus_input_dir); | |
577 | remove_proc_entry("handlers", proc_bus_input_dir); | |
578 | remove_proc_entry("input", proc_bus); | |
579 | } | |
580 | ||
581 | #else /* !CONFIG_PROC_FS */ | |
582 | static inline void input_wakeup_procfs_readers(void) { } | |
583 | static inline int input_proc_init(void) { return 0; } | |
584 | static inline void input_proc_exit(void) { } | |
585 | #endif | |
586 | ||
5c1e9a6a DT |
587 | #define INPUT_DEV_STRING_ATTR_SHOW(name) \ |
588 | static ssize_t input_dev_show_##name(struct class_device *dev, char *buf) \ | |
589 | { \ | |
590 | struct input_dev *input_dev = to_input_dev(dev); \ | |
5c1e9a6a | 591 | \ |
1efa770f DT |
592 | return scnprintf(buf, PAGE_SIZE, "%s\n", \ |
593 | input_dev->name ? input_dev->name : ""); \ | |
629b77a4 GKH |
594 | } \ |
595 | static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL); | |
5c1e9a6a DT |
596 | |
597 | INPUT_DEV_STRING_ATTR_SHOW(name); | |
598 | INPUT_DEV_STRING_ATTR_SHOW(phys); | |
599 | INPUT_DEV_STRING_ATTR_SHOW(uniq); | |
600 | ||
ac648a6a DT |
601 | static int input_print_modalias_bits(char *buf, int size, |
602 | char name, unsigned long *bm, | |
603 | unsigned int min_bit, unsigned int max_bit) | |
1d8f430c | 604 | { |
ac648a6a | 605 | int len = 0, i; |
1d8f430c | 606 | |
ac648a6a DT |
607 | len += snprintf(buf, max(size, 0), "%c", name); |
608 | for (i = min_bit; i < max_bit; i++) | |
609 | if (bm[LONG(i)] & BIT(i)) | |
610 | len += snprintf(buf + len, max(size - len, 0), "%X,", i); | |
1d8f430c RR |
611 | return len; |
612 | } | |
613 | ||
2db66876 DT |
614 | static int input_print_modalias(char *buf, int size, struct input_dev *id, |
615 | int add_cr) | |
1d8f430c | 616 | { |
bd37e5a9 | 617 | int len; |
1d8f430c | 618 | |
ac648a6a DT |
619 | len = snprintf(buf, max(size, 0), |
620 | "input:b%04Xv%04Xp%04Xe%04X-", | |
621 | id->id.bustype, id->id.vendor, | |
622 | id->id.product, id->id.version); | |
623 | ||
624 | len += input_print_modalias_bits(buf + len, size - len, | |
625 | 'e', id->evbit, 0, EV_MAX); | |
626 | len += input_print_modalias_bits(buf + len, size - len, | |
627 | 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX); | |
628 | len += input_print_modalias_bits(buf + len, size - len, | |
629 | 'r', id->relbit, 0, REL_MAX); | |
630 | len += input_print_modalias_bits(buf + len, size - len, | |
631 | 'a', id->absbit, 0, ABS_MAX); | |
632 | len += input_print_modalias_bits(buf + len, size - len, | |
633 | 'm', id->mscbit, 0, MSC_MAX); | |
634 | len += input_print_modalias_bits(buf + len, size - len, | |
635 | 'l', id->ledbit, 0, LED_MAX); | |
636 | len += input_print_modalias_bits(buf + len, size - len, | |
637 | 's', id->sndbit, 0, SND_MAX); | |
638 | len += input_print_modalias_bits(buf + len, size - len, | |
639 | 'f', id->ffbit, 0, FF_MAX); | |
640 | len += input_print_modalias_bits(buf + len, size - len, | |
641 | 'w', id->swbit, 0, SW_MAX); | |
2db66876 DT |
642 | |
643 | if (add_cr) | |
ac648a6a | 644 | len += snprintf(buf + len, max(size - len, 0), "\n"); |
2db66876 | 645 | |
bd37e5a9 KS |
646 | return len; |
647 | } | |
648 | ||
649 | static ssize_t input_dev_show_modalias(struct class_device *dev, char *buf) | |
650 | { | |
651 | struct input_dev *id = to_input_dev(dev); | |
652 | ssize_t len; | |
653 | ||
2db66876 DT |
654 | len = input_print_modalias(buf, PAGE_SIZE, id, 1); |
655 | ||
8a3cf456 | 656 | return min_t(int, len, PAGE_SIZE); |
1d8f430c RR |
657 | } |
658 | static CLASS_DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL); | |
659 | ||
629b77a4 GKH |
660 | static struct attribute *input_dev_attrs[] = { |
661 | &class_device_attr_name.attr, | |
662 | &class_device_attr_phys.attr, | |
663 | &class_device_attr_uniq.attr, | |
1d8f430c | 664 | &class_device_attr_modalias.attr, |
629b77a4 GKH |
665 | NULL |
666 | }; | |
667 | ||
bd0ef235 | 668 | static struct attribute_group input_dev_attr_group = { |
629b77a4 | 669 | .attrs = input_dev_attrs, |
5c1e9a6a DT |
670 | }; |
671 | ||
672 | #define INPUT_DEV_ID_ATTR(name) \ | |
673 | static ssize_t input_dev_show_id_##name(struct class_device *dev, char *buf) \ | |
674 | { \ | |
675 | struct input_dev *input_dev = to_input_dev(dev); \ | |
2db66876 | 676 | return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \ |
5c1e9a6a DT |
677 | } \ |
678 | static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL); | |
679 | ||
680 | INPUT_DEV_ID_ATTR(bustype); | |
681 | INPUT_DEV_ID_ATTR(vendor); | |
682 | INPUT_DEV_ID_ATTR(product); | |
683 | INPUT_DEV_ID_ATTR(version); | |
684 | ||
685 | static struct attribute *input_dev_id_attrs[] = { | |
686 | &class_device_attr_bustype.attr, | |
687 | &class_device_attr_vendor.attr, | |
688 | &class_device_attr_product.attr, | |
689 | &class_device_attr_version.attr, | |
690 | NULL | |
691 | }; | |
692 | ||
693 | static struct attribute_group input_dev_id_attr_group = { | |
694 | .name = "id", | |
695 | .attrs = input_dev_id_attrs, | |
696 | }; | |
697 | ||
969b21cd DT |
698 | static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap, |
699 | int max, int add_cr) | |
700 | { | |
701 | int i; | |
702 | int len = 0; | |
703 | ||
704 | for (i = NBITS(max) - 1; i > 0; i--) | |
705 | if (bitmap[i]) | |
706 | break; | |
707 | ||
708 | for (; i >= 0; i--) | |
709 | len += snprintf(buf + len, max(buf_size - len, 0), | |
710 | "%lx%s", bitmap[i], i > 0 ? " " : ""); | |
711 | ||
712 | if (add_cr) | |
713 | len += snprintf(buf + len, max(buf_size - len, 0), "\n"); | |
714 | ||
715 | return len; | |
716 | } | |
717 | ||
5c1e9a6a DT |
718 | #define INPUT_DEV_CAP_ATTR(ev, bm) \ |
719 | static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf) \ | |
720 | { \ | |
721 | struct input_dev *input_dev = to_input_dev(dev); \ | |
2db66876 DT |
722 | int len = input_print_bitmap(buf, PAGE_SIZE, \ |
723 | input_dev->bm##bit, ev##_MAX, 1); \ | |
724 | return min_t(int, len, PAGE_SIZE); \ | |
5c1e9a6a DT |
725 | } \ |
726 | static CLASS_DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL); | |
727 | ||
728 | INPUT_DEV_CAP_ATTR(EV, ev); | |
729 | INPUT_DEV_CAP_ATTR(KEY, key); | |
730 | INPUT_DEV_CAP_ATTR(REL, rel); | |
731 | INPUT_DEV_CAP_ATTR(ABS, abs); | |
732 | INPUT_DEV_CAP_ATTR(MSC, msc); | |
733 | INPUT_DEV_CAP_ATTR(LED, led); | |
734 | INPUT_DEV_CAP_ATTR(SND, snd); | |
735 | INPUT_DEV_CAP_ATTR(FF, ff); | |
736 | INPUT_DEV_CAP_ATTR(SW, sw); | |
737 | ||
738 | static struct attribute *input_dev_caps_attrs[] = { | |
739 | &class_device_attr_ev.attr, | |
740 | &class_device_attr_key.attr, | |
741 | &class_device_attr_rel.attr, | |
742 | &class_device_attr_abs.attr, | |
743 | &class_device_attr_msc.attr, | |
744 | &class_device_attr_led.attr, | |
745 | &class_device_attr_snd.attr, | |
746 | &class_device_attr_ff.attr, | |
747 | &class_device_attr_sw.attr, | |
748 | NULL | |
749 | }; | |
750 | ||
751 | static struct attribute_group input_dev_caps_attr_group = { | |
752 | .name = "capabilities", | |
753 | .attrs = input_dev_caps_attrs, | |
754 | }; | |
755 | ||
d19fbe8a DT |
756 | static void input_dev_release(struct class_device *class_dev) |
757 | { | |
758 | struct input_dev *dev = to_input_dev(class_dev); | |
759 | ||
509ca1a9 | 760 | input_ff_destroy(dev); |
d19fbe8a | 761 | kfree(dev); |
509ca1a9 | 762 | |
d19fbe8a DT |
763 | module_put(THIS_MODULE); |
764 | } | |
765 | ||
a7fadbe1 | 766 | /* |
312c004d | 767 | * Input uevent interface - loading event handlers based on |
a7fadbe1 DT |
768 | * device bitfields. |
769 | */ | |
312c004d | 770 | static int input_add_uevent_bm_var(char **envp, int num_envp, int *cur_index, |
ac648a6a DT |
771 | char *buffer, int buffer_size, int *cur_len, |
772 | const char *name, unsigned long *bitmap, int max) | |
a7fadbe1 DT |
773 | { |
774 | if (*cur_index >= num_envp - 1) | |
775 | return -ENOMEM; | |
776 | ||
777 | envp[*cur_index] = buffer + *cur_len; | |
778 | ||
779 | *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), name); | |
ac648a6a | 780 | if (*cur_len >= buffer_size) |
a7fadbe1 DT |
781 | return -ENOMEM; |
782 | ||
783 | *cur_len += input_print_bitmap(buffer + *cur_len, | |
784 | max(buffer_size - *cur_len, 0), | |
2db66876 | 785 | bitmap, max, 0) + 1; |
a7fadbe1 DT |
786 | if (*cur_len > buffer_size) |
787 | return -ENOMEM; | |
788 | ||
789 | (*cur_index)++; | |
790 | return 0; | |
791 | } | |
792 | ||
ac648a6a DT |
793 | static int input_add_uevent_modalias_var(char **envp, int num_envp, int *cur_index, |
794 | char *buffer, int buffer_size, int *cur_len, | |
795 | struct input_dev *dev) | |
796 | { | |
797 | if (*cur_index >= num_envp - 1) | |
798 | return -ENOMEM; | |
799 | ||
800 | envp[*cur_index] = buffer + *cur_len; | |
801 | ||
802 | *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), | |
803 | "MODALIAS="); | |
804 | if (*cur_len >= buffer_size) | |
805 | return -ENOMEM; | |
806 | ||
807 | *cur_len += input_print_modalias(buffer + *cur_len, | |
808 | max(buffer_size - *cur_len, 0), | |
809 | dev, 0) + 1; | |
810 | if (*cur_len > buffer_size) | |
811 | return -ENOMEM; | |
812 | ||
813 | (*cur_index)++; | |
814 | return 0; | |
815 | } | |
816 | ||
a7fadbe1 DT |
817 | #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \ |
818 | do { \ | |
ac648a6a | 819 | int err = add_uevent_var(envp, num_envp, &i, \ |
a7fadbe1 DT |
820 | buffer, buffer_size, &len, \ |
821 | fmt, val); \ | |
822 | if (err) \ | |
823 | return err; \ | |
824 | } while (0) | |
825 | ||
826 | #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \ | |
827 | do { \ | |
312c004d | 828 | int err = input_add_uevent_bm_var(envp, num_envp, &i, \ |
a7fadbe1 DT |
829 | buffer, buffer_size, &len, \ |
830 | name, bm, max); \ | |
831 | if (err) \ | |
832 | return err; \ | |
833 | } while (0) | |
834 | ||
ac648a6a DT |
835 | #define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev) \ |
836 | do { \ | |
837 | int err = input_add_uevent_modalias_var(envp, \ | |
838 | num_envp, &i, \ | |
839 | buffer, buffer_size, &len, \ | |
840 | dev); \ | |
841 | if (err) \ | |
842 | return err; \ | |
843 | } while (0) | |
844 | ||
312c004d KS |
845 | static int input_dev_uevent(struct class_device *cdev, char **envp, |
846 | int num_envp, char *buffer, int buffer_size) | |
a7fadbe1 DT |
847 | { |
848 | struct input_dev *dev = to_input_dev(cdev); | |
849 | int i = 0; | |
850 | int len = 0; | |
851 | ||
852 | INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x", | |
853 | dev->id.bustype, dev->id.vendor, | |
854 | dev->id.product, dev->id.version); | |
855 | if (dev->name) | |
856 | INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name); | |
857 | if (dev->phys) | |
858 | INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys); | |
08de1f04 | 859 | if (dev->uniq) |
a7fadbe1 DT |
860 | INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq); |
861 | ||
862 | INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX); | |
863 | if (test_bit(EV_KEY, dev->evbit)) | |
864 | INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX); | |
865 | if (test_bit(EV_REL, dev->evbit)) | |
866 | INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX); | |
867 | if (test_bit(EV_ABS, dev->evbit)) | |
868 | INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX); | |
869 | if (test_bit(EV_MSC, dev->evbit)) | |
870 | INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX); | |
871 | if (test_bit(EV_LED, dev->evbit)) | |
872 | INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX); | |
873 | if (test_bit(EV_SND, dev->evbit)) | |
874 | INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX); | |
875 | if (test_bit(EV_FF, dev->evbit)) | |
876 | INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX); | |
877 | if (test_bit(EV_SW, dev->evbit)) | |
878 | INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX); | |
879 | ||
ac648a6a | 880 | INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev); |
a7fadbe1 | 881 | |
bd37e5a9 | 882 | envp[i] = NULL; |
a7fadbe1 DT |
883 | return 0; |
884 | } | |
885 | ||
ea9f240b GKH |
886 | struct class input_class = { |
887 | .name = "input", | |
d19fbe8a | 888 | .release = input_dev_release, |
312c004d | 889 | .uevent = input_dev_uevent, |
d19fbe8a | 890 | }; |
ca56fe07 | 891 | EXPORT_SYMBOL_GPL(input_class); |
d19fbe8a | 892 | |
1447190e DT |
893 | /** |
894 | * input_allocate_device - allocate memory for new input device | |
895 | * | |
896 | * Returns prepared struct input_dev or NULL. | |
897 | * | |
898 | * NOTE: Use input_free_device() to free devices that have not been | |
899 | * registered; input_unregister_device() should be used for already | |
900 | * registered devices. | |
901 | */ | |
d19fbe8a DT |
902 | struct input_dev *input_allocate_device(void) |
903 | { | |
904 | struct input_dev *dev; | |
905 | ||
906 | dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL); | |
907 | if (dev) { | |
ea9f240b | 908 | dev->cdev.class = &input_class; |
d19fbe8a | 909 | class_device_initialize(&dev->cdev); |
f60d2b11 | 910 | mutex_init(&dev->mutex); |
d19fbe8a DT |
911 | INIT_LIST_HEAD(&dev->h_list); |
912 | INIT_LIST_HEAD(&dev->node); | |
655816e4 DT |
913 | |
914 | __module_get(THIS_MODULE); | |
d19fbe8a DT |
915 | } |
916 | ||
917 | return dev; | |
918 | } | |
ca56fe07 | 919 | EXPORT_SYMBOL(input_allocate_device); |
d19fbe8a | 920 | |
1447190e DT |
921 | /** |
922 | * input_free_device - free memory occupied by input_dev structure | |
923 | * @dev: input device to free | |
924 | * | |
925 | * This function should only be used if input_register_device() | |
926 | * was not called yet or if it failed. Once device was registered | |
927 | * use input_unregister_device() and memory will be freed once last | |
928 | * refrence to the device is dropped. | |
929 | * | |
930 | * Device should be allocated by input_allocate_device(). | |
931 | * | |
932 | * NOTE: If there are references to the input device then memory | |
933 | * will not be freed until last reference is dropped. | |
934 | */ | |
f60d2b11 DT |
935 | void input_free_device(struct input_dev *dev) |
936 | { | |
937 | if (dev) { | |
938 | ||
939 | mutex_lock(&dev->mutex); | |
940 | dev->name = dev->phys = dev->uniq = NULL; | |
941 | mutex_unlock(&dev->mutex); | |
942 | ||
943 | input_put_device(dev); | |
944 | } | |
945 | } | |
ca56fe07 | 946 | EXPORT_SYMBOL(input_free_device); |
f60d2b11 | 947 | |
5f945489 | 948 | int input_register_device(struct input_dev *dev) |
1da177e4 | 949 | { |
bd0ef235 | 950 | static atomic_t input_no = ATOMIC_INIT(0); |
1da177e4 LT |
951 | struct input_handle *handle; |
952 | struct input_handler *handler; | |
66e66118 | 953 | const struct input_device_id *id; |
bd0ef235 DT |
954 | const char *path; |
955 | int error; | |
1da177e4 | 956 | |
5f945489 | 957 | set_bit(EV_SYN, dev->evbit); |
0fbf87ca | 958 | |
1da177e4 LT |
959 | /* |
960 | * If delay and period are pre-set by the driver, then autorepeating | |
961 | * is handled by the driver itself and we don't do it in input.c. | |
962 | */ | |
963 | ||
964 | init_timer(&dev->timer); | |
965 | if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) { | |
966 | dev->timer.data = (long) dev; | |
967 | dev->timer.function = input_repeat_key; | |
968 | dev->rep[REP_DELAY] = 250; | |
969 | dev->rep[REP_PERIOD] = 33; | |
970 | } | |
971 | ||
1da177e4 LT |
972 | list_add_tail(&dev->node, &input_dev_list); |
973 | ||
bd0ef235 DT |
974 | snprintf(dev->cdev.class_id, sizeof(dev->cdev.class_id), |
975 | "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1); | |
976 | ||
977 | error = class_device_add(&dev->cdev); | |
978 | if (error) | |
979 | return error; | |
980 | ||
981 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_attr_group); | |
982 | if (error) | |
983 | goto fail1; | |
984 | ||
985 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_id_attr_group); | |
986 | if (error) | |
987 | goto fail2; | |
988 | ||
989 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_caps_attr_group); | |
990 | if (error) | |
991 | goto fail3; | |
992 | ||
bd0ef235 DT |
993 | path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL); |
994 | printk(KERN_INFO "input: %s as %s\n", | |
995 | dev->name ? dev->name : "Unspecified device", path ? path : "N/A"); | |
996 | kfree(path); | |
10204020 | 997 | |
1da177e4 LT |
998 | list_for_each_entry(handler, &input_handler_list, node) |
999 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) | |
1000 | if ((id = input_match_device(handler->id_table, dev))) | |
c7e8dc6e | 1001 | if ((handle = handler->connect(handler, dev, id))) { |
1da177e4 | 1002 | input_link_handle(handle); |
c7e8dc6e DT |
1003 | if (handler->start) |
1004 | handler->start(handle); | |
1005 | } | |
1da177e4 | 1006 | |
f96b434d | 1007 | input_wakeup_procfs_readers(); |
5f945489 DT |
1008 | |
1009 | return 0; | |
bd0ef235 DT |
1010 | |
1011 | fail3: sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group); | |
1012 | fail2: sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group); | |
1013 | fail1: class_device_del(&dev->cdev); | |
1014 | return error; | |
1da177e4 | 1015 | } |
ca56fe07 | 1016 | EXPORT_SYMBOL(input_register_device); |
1da177e4 LT |
1017 | |
1018 | void input_unregister_device(struct input_dev *dev) | |
1019 | { | |
1e0afb28 | 1020 | struct list_head *node, *next; |
6d2750c1 | 1021 | int code; |
1da177e4 | 1022 | |
6d2750c1 DT |
1023 | for (code = 0; code <= KEY_MAX; code++) |
1024 | if (test_bit(code, dev->key)) | |
1025 | input_report_key(dev, code, 0); | |
1026 | input_sync(dev); | |
1da177e4 LT |
1027 | |
1028 | del_timer_sync(&dev->timer); | |
1029 | ||
1030 | list_for_each_safe(node, next, &dev->h_list) { | |
1031 | struct input_handle * handle = to_handle(node); | |
1032 | list_del_init(&handle->d_node); | |
1033 | list_del_init(&handle->h_node); | |
1034 | handle->handler->disconnect(handle); | |
1035 | } | |
1036 | ||
1da177e4 LT |
1037 | list_del_init(&dev->node); |
1038 | ||
5f945489 DT |
1039 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group); |
1040 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group); | |
bd0ef235 | 1041 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group); |
d19fbe8a | 1042 | |
e7374e48 DT |
1043 | class_device_unregister(&dev->cdev); |
1044 | ||
f96b434d | 1045 | input_wakeup_procfs_readers(); |
1da177e4 | 1046 | } |
ca56fe07 | 1047 | EXPORT_SYMBOL(input_unregister_device); |
1da177e4 | 1048 | |
4263cf0f | 1049 | int input_register_handler(struct input_handler *handler) |
1da177e4 LT |
1050 | { |
1051 | struct input_dev *dev; | |
1052 | struct input_handle *handle; | |
66e66118 | 1053 | const struct input_device_id *id; |
1da177e4 | 1054 | |
1da177e4 LT |
1055 | INIT_LIST_HEAD(&handler->h_list); |
1056 | ||
4263cf0f DT |
1057 | if (handler->fops != NULL) { |
1058 | if (input_table[handler->minor >> 5]) | |
1059 | return -EBUSY; | |
1060 | ||
1da177e4 | 1061 | input_table[handler->minor >> 5] = handler; |
4263cf0f | 1062 | } |
1da177e4 LT |
1063 | |
1064 | list_add_tail(&handler->node, &input_handler_list); | |
1065 | ||
1066 | list_for_each_entry(dev, &input_dev_list, node) | |
1067 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) | |
1068 | if ((id = input_match_device(handler->id_table, dev))) | |
b6d786db | 1069 | if ((handle = handler->connect(handler, dev, id))) { |
1da177e4 | 1070 | input_link_handle(handle); |
b6d786db DT |
1071 | if (handler->start) |
1072 | handler->start(handle); | |
1073 | } | |
1da177e4 | 1074 | |
f96b434d | 1075 | input_wakeup_procfs_readers(); |
4263cf0f | 1076 | return 0; |
1da177e4 | 1077 | } |
ca56fe07 | 1078 | EXPORT_SYMBOL(input_register_handler); |
1da177e4 LT |
1079 | |
1080 | void input_unregister_handler(struct input_handler *handler) | |
1081 | { | |
1e0afb28 | 1082 | struct list_head *node, *next; |
1da177e4 LT |
1083 | |
1084 | list_for_each_safe(node, next, &handler->h_list) { | |
1085 | struct input_handle * handle = to_handle_h(node); | |
1086 | list_del_init(&handle->h_node); | |
1087 | list_del_init(&handle->d_node); | |
1088 | handler->disconnect(handle); | |
1089 | } | |
1090 | ||
1091 | list_del_init(&handler->node); | |
1092 | ||
1093 | if (handler->fops != NULL) | |
1094 | input_table[handler->minor >> 5] = NULL; | |
1095 | ||
f96b434d | 1096 | input_wakeup_procfs_readers(); |
1da177e4 | 1097 | } |
ca56fe07 | 1098 | EXPORT_SYMBOL(input_unregister_handler); |
1da177e4 LT |
1099 | |
1100 | static int input_open_file(struct inode *inode, struct file *file) | |
1101 | { | |
1102 | struct input_handler *handler = input_table[iminor(inode) >> 5]; | |
99ac48f5 | 1103 | const struct file_operations *old_fops, *new_fops = NULL; |
1da177e4 LT |
1104 | int err; |
1105 | ||
1106 | /* No load-on-demand here? */ | |
1107 | if (!handler || !(new_fops = fops_get(handler->fops))) | |
1108 | return -ENODEV; | |
1109 | ||
1110 | /* | |
1111 | * That's _really_ odd. Usually NULL ->open means "nothing special", | |
1112 | * not "no device". Oh, well... | |
1113 | */ | |
1114 | if (!new_fops->open) { | |
1115 | fops_put(new_fops); | |
1116 | return -ENODEV; | |
1117 | } | |
1118 | old_fops = file->f_op; | |
1119 | file->f_op = new_fops; | |
1120 | ||
1121 | err = new_fops->open(inode, file); | |
1122 | ||
1123 | if (err) { | |
1124 | fops_put(file->f_op); | |
1125 | file->f_op = fops_get(old_fops); | |
1126 | } | |
1127 | fops_put(old_fops); | |
1128 | return err; | |
1129 | } | |
1130 | ||
2b8693c0 | 1131 | static const struct file_operations input_fops = { |
1da177e4 LT |
1132 | .owner = THIS_MODULE, |
1133 | .open = input_open_file, | |
1134 | }; | |
1135 | ||
f96b434d | 1136 | static int __init input_init(void) |
1da177e4 | 1137 | { |
f96b434d | 1138 | int err; |
1da177e4 | 1139 | |
ea9f240b | 1140 | err = class_register(&input_class); |
d19fbe8a DT |
1141 | if (err) { |
1142 | printk(KERN_ERR "input: unable to register input_dev class\n"); | |
1143 | return err; | |
1144 | } | |
1145 | ||
f96b434d DT |
1146 | err = input_proc_init(); |
1147 | if (err) | |
b0fdfebb | 1148 | goto fail1; |
1da177e4 | 1149 | |
f96b434d DT |
1150 | err = register_chrdev(INPUT_MAJOR, "input", &input_fops); |
1151 | if (err) { | |
1152 | printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR); | |
b0fdfebb | 1153 | goto fail2; |
1da177e4 | 1154 | } |
e334016f | 1155 | |
1da177e4 | 1156 | return 0; |
1da177e4 | 1157 | |
b0fdfebb | 1158 | fail2: input_proc_exit(); |
ea9f240b | 1159 | fail1: class_unregister(&input_class); |
f96b434d | 1160 | return err; |
1da177e4 LT |
1161 | } |
1162 | ||
1163 | static void __exit input_exit(void) | |
1164 | { | |
f96b434d | 1165 | input_proc_exit(); |
1da177e4 | 1166 | unregister_chrdev(INPUT_MAJOR, "input"); |
ea9f240b | 1167 | class_unregister(&input_class); |
1da177e4 LT |
1168 | } |
1169 | ||
1170 | subsys_initcall(input_init); | |
1171 | module_exit(input_exit); |