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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> | |
1da177e4 LT |
21 | #include <linux/interrupt.h> |
22 | #include <linux/poll.h> | |
23 | #include <linux/device.h> | |
1da177e4 LT |
24 | |
25 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); | |
26 | MODULE_DESCRIPTION("Input core"); | |
27 | MODULE_LICENSE("GPL"); | |
28 | ||
d19fbe8a | 29 | EXPORT_SYMBOL(input_allocate_device); |
1da177e4 LT |
30 | EXPORT_SYMBOL(input_register_device); |
31 | EXPORT_SYMBOL(input_unregister_device); | |
32 | EXPORT_SYMBOL(input_register_handler); | |
33 | EXPORT_SYMBOL(input_unregister_handler); | |
34 | EXPORT_SYMBOL(input_grab_device); | |
35 | EXPORT_SYMBOL(input_release_device); | |
36 | EXPORT_SYMBOL(input_open_device); | |
37 | EXPORT_SYMBOL(input_close_device); | |
38 | EXPORT_SYMBOL(input_accept_process); | |
39 | EXPORT_SYMBOL(input_flush_device); | |
40 | EXPORT_SYMBOL(input_event); | |
ea9f240b | 41 | EXPORT_SYMBOL_GPL(input_class); |
1da177e4 LT |
42 | |
43 | #define INPUT_DEVICES 256 | |
44 | ||
45 | static LIST_HEAD(input_dev_list); | |
46 | static LIST_HEAD(input_handler_list); | |
47 | ||
48 | static struct input_handler *input_table[8]; | |
49 | ||
1da177e4 LT |
50 | void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) |
51 | { | |
52 | struct input_handle *handle; | |
53 | ||
54 | if (type > EV_MAX || !test_bit(type, dev->evbit)) | |
55 | return; | |
56 | ||
57 | add_input_randomness(type, code, value); | |
58 | ||
59 | switch (type) { | |
60 | ||
61 | case EV_SYN: | |
62 | switch (code) { | |
63 | case SYN_CONFIG: | |
64 | if (dev->event) dev->event(dev, type, code, value); | |
65 | break; | |
66 | ||
67 | case SYN_REPORT: | |
68 | if (dev->sync) return; | |
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 | ||
137 | if (dev->event) dev->event(dev, type, code, value); | |
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); | |
147 | if (dev->event) dev->event(dev, type, code, value); | |
148 | ||
149 | break; | |
150 | ||
151 | case EV_SND: | |
152 | ||
153 | if (code > SND_MAX || !test_bit(code, dev->sndbit)) | |
154 | return; | |
155 | ||
156 | if (dev->event) dev->event(dev, type, code, value); | |
157 | ||
158 | break; | |
159 | ||
160 | case EV_REP: | |
161 | ||
162 | if (code > REP_MAX || value < 0 || dev->rep[code] == value) return; | |
163 | ||
164 | dev->rep[code] = value; | |
165 | if (dev->event) dev->event(dev, type, code, value); | |
166 | ||
167 | break; | |
168 | ||
169 | case EV_FF: | |
170 | if (dev->event) dev->event(dev, type, code, value); | |
171 | break; | |
172 | } | |
173 | ||
174 | if (type != EV_SYN) | |
175 | dev->sync = 0; | |
176 | ||
177 | if (dev->grab) | |
178 | dev->grab->handler->event(dev->grab, type, code, value); | |
179 | else | |
180 | list_for_each_entry(handle, &dev->h_list, d_node) | |
181 | if (handle->open) | |
182 | handle->handler->event(handle, type, code, value); | |
183 | } | |
184 | ||
185 | static void input_repeat_key(unsigned long data) | |
186 | { | |
187 | struct input_dev *dev = (void *) data; | |
188 | ||
189 | if (!test_bit(dev->repeat_key, dev->key)) | |
190 | return; | |
191 | ||
192 | input_event(dev, EV_KEY, dev->repeat_key, 2); | |
193 | input_sync(dev); | |
194 | ||
195 | if (dev->rep[REP_PERIOD]) | |
196 | mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_PERIOD])); | |
197 | } | |
198 | ||
199 | int input_accept_process(struct input_handle *handle, struct file *file) | |
200 | { | |
201 | if (handle->dev->accept) | |
202 | return handle->dev->accept(handle->dev, file); | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
207 | int input_grab_device(struct input_handle *handle) | |
208 | { | |
209 | if (handle->dev->grab) | |
210 | return -EBUSY; | |
211 | ||
212 | handle->dev->grab = handle; | |
213 | return 0; | |
214 | } | |
215 | ||
216 | void input_release_device(struct input_handle *handle) | |
217 | { | |
218 | if (handle->dev->grab == handle) | |
219 | handle->dev->grab = NULL; | |
220 | } | |
221 | ||
222 | int input_open_device(struct input_handle *handle) | |
223 | { | |
0fbf87ca DT |
224 | struct input_dev *dev = handle->dev; |
225 | int err; | |
226 | ||
227 | err = down_interruptible(&dev->sem); | |
228 | if (err) | |
229 | return err; | |
230 | ||
1da177e4 | 231 | handle->open++; |
0fbf87ca DT |
232 | |
233 | if (!dev->users++ && dev->open) | |
234 | err = dev->open(dev); | |
235 | ||
236 | if (err) | |
237 | handle->open--; | |
238 | ||
239 | up(&dev->sem); | |
240 | ||
241 | return err; | |
1da177e4 LT |
242 | } |
243 | ||
244 | int input_flush_device(struct input_handle* handle, struct file* file) | |
245 | { | |
246 | if (handle->dev->flush) | |
247 | return handle->dev->flush(handle->dev, file); | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | void input_close_device(struct input_handle *handle) | |
253 | { | |
0fbf87ca DT |
254 | struct input_dev *dev = handle->dev; |
255 | ||
1da177e4 | 256 | input_release_device(handle); |
0fbf87ca DT |
257 | |
258 | down(&dev->sem); | |
259 | ||
260 | if (!--dev->users && dev->close) | |
261 | dev->close(dev); | |
1da177e4 | 262 | handle->open--; |
0fbf87ca DT |
263 | |
264 | up(&dev->sem); | |
1da177e4 LT |
265 | } |
266 | ||
267 | static void input_link_handle(struct input_handle *handle) | |
268 | { | |
269 | list_add_tail(&handle->d_node, &handle->dev->h_list); | |
270 | list_add_tail(&handle->h_node, &handle->handler->h_list); | |
271 | } | |
272 | ||
273 | #define MATCH_BIT(bit, max) \ | |
274 | for (i = 0; i < NBITS(max); i++) \ | |
275 | if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \ | |
276 | break; \ | |
277 | if (i != NBITS(max)) \ | |
278 | continue; | |
279 | ||
280 | static struct input_device_id *input_match_device(struct input_device_id *id, struct input_dev *dev) | |
281 | { | |
282 | int i; | |
283 | ||
284 | for (; id->flags || id->driver_info; id++) { | |
285 | ||
286 | if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) | |
287 | if (id->id.bustype != dev->id.bustype) | |
288 | continue; | |
289 | ||
290 | if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) | |
291 | if (id->id.vendor != dev->id.vendor) | |
292 | continue; | |
293 | ||
294 | if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) | |
295 | if (id->id.product != dev->id.product) | |
296 | continue; | |
297 | ||
298 | if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) | |
299 | if (id->id.version != dev->id.version) | |
300 | continue; | |
301 | ||
302 | MATCH_BIT(evbit, EV_MAX); | |
303 | MATCH_BIT(keybit, KEY_MAX); | |
304 | MATCH_BIT(relbit, REL_MAX); | |
305 | MATCH_BIT(absbit, ABS_MAX); | |
306 | MATCH_BIT(mscbit, MSC_MAX); | |
307 | MATCH_BIT(ledbit, LED_MAX); | |
308 | MATCH_BIT(sndbit, SND_MAX); | |
309 | MATCH_BIT(ffbit, FF_MAX); | |
ff13f98b | 310 | MATCH_BIT(swbit, SW_MAX); |
1da177e4 LT |
311 | |
312 | return id; | |
313 | } | |
314 | ||
315 | return NULL; | |
316 | } | |
317 | ||
a7fadbe1 | 318 | static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap, int max) |
5c1e9a6a DT |
319 | { |
320 | int i; | |
321 | int len = 0; | |
322 | ||
323 | for (i = NBITS(max) - 1; i > 0; i--) | |
324 | if (bitmap[i]) | |
325 | break; | |
326 | ||
327 | for (; i >= 0; i--) | |
a7fadbe1 DT |
328 | len += snprintf(buf + len, max(buf_size - len, 0), |
329 | "%lx%s", bitmap[i], i > 0 ? " " : ""); | |
5c1e9a6a DT |
330 | return len; |
331 | } | |
332 | ||
f96b434d DT |
333 | #ifdef CONFIG_PROC_FS |
334 | ||
335 | static struct proc_dir_entry *proc_bus_input_dir; | |
336 | static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait); | |
337 | static int input_devices_state; | |
338 | ||
339 | static inline void input_wakeup_procfs_readers(void) | |
340 | { | |
341 | input_devices_state++; | |
342 | wake_up(&input_devices_poll_wait); | |
343 | } | |
344 | ||
345 | static unsigned int input_devices_poll(struct file *file, poll_table *wait) | |
346 | { | |
347 | int state = input_devices_state; | |
348 | poll_wait(file, &input_devices_poll_wait, wait); | |
349 | if (state != input_devices_state) | |
350 | return POLLIN | POLLRDNORM; | |
351 | return 0; | |
352 | } | |
353 | ||
a7fadbe1 | 354 | #define SPRINTF_BIT(ev, bm) \ |
5c1e9a6a DT |
355 | do { \ |
356 | len += sprintf(buf + len, "B: %s=", #ev); \ | |
a7fadbe1 | 357 | len += input_print_bitmap(buf + len, INT_MAX, \ |
5c1e9a6a | 358 | dev->bm##bit, ev##_MAX); \ |
a7fadbe1 | 359 | len += sprintf(buf + len, "\n"); \ |
f96b434d DT |
360 | } while (0) |
361 | ||
a7fadbe1 | 362 | #define TEST_AND_SPRINTF_BIT(ev, bm) \ |
5c1e9a6a DT |
363 | do { \ |
364 | if (test_bit(EV_##ev, dev->evbit)) \ | |
a7fadbe1 | 365 | SPRINTF_BIT(ev, bm); \ |
f96b434d DT |
366 | } while (0) |
367 | ||
368 | static int input_devices_read(char *buf, char **start, off_t pos, int count, int *eof, void *data) | |
369 | { | |
370 | struct input_dev *dev; | |
371 | struct input_handle *handle; | |
051b2fea | 372 | const char *path; |
f96b434d DT |
373 | |
374 | off_t at = 0; | |
5c1e9a6a | 375 | int len, cnt = 0; |
f96b434d DT |
376 | |
377 | list_for_each_entry(dev, &input_dev_list, node) { | |
378 | ||
5f945489 | 379 | path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL); |
051b2fea | 380 | |
f96b434d DT |
381 | len = sprintf(buf, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n", |
382 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); | |
383 | ||
384 | len += sprintf(buf + len, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); | |
385 | len += sprintf(buf + len, "P: Phys=%s\n", dev->phys ? dev->phys : ""); | |
051b2fea | 386 | len += sprintf(buf + len, "S: Sysfs=%s\n", path ? path : ""); |
f96b434d DT |
387 | len += sprintf(buf + len, "H: Handlers="); |
388 | ||
389 | list_for_each_entry(handle, &dev->h_list, d_node) | |
390 | len += sprintf(buf + len, "%s ", handle->name); | |
391 | ||
392 | len += sprintf(buf + len, "\n"); | |
393 | ||
a7fadbe1 DT |
394 | SPRINTF_BIT(EV, ev); |
395 | TEST_AND_SPRINTF_BIT(KEY, key); | |
396 | TEST_AND_SPRINTF_BIT(REL, rel); | |
397 | TEST_AND_SPRINTF_BIT(ABS, abs); | |
398 | TEST_AND_SPRINTF_BIT(MSC, msc); | |
399 | TEST_AND_SPRINTF_BIT(LED, led); | |
400 | TEST_AND_SPRINTF_BIT(SND, snd); | |
401 | TEST_AND_SPRINTF_BIT(FF, ff); | |
402 | TEST_AND_SPRINTF_BIT(SW, sw); | |
f96b434d DT |
403 | |
404 | len += sprintf(buf + len, "\n"); | |
405 | ||
406 | at += len; | |
407 | ||
408 | if (at >= pos) { | |
409 | if (!*start) { | |
410 | *start = buf + (pos - (at - len)); | |
411 | cnt = at - pos; | |
412 | } else cnt += len; | |
413 | buf += len; | |
414 | if (cnt >= count) | |
415 | break; | |
416 | } | |
051b2fea DT |
417 | |
418 | kfree(path); | |
f96b434d DT |
419 | } |
420 | ||
421 | if (&dev->node == &input_dev_list) | |
422 | *eof = 1; | |
423 | ||
424 | return (count > cnt) ? cnt : count; | |
425 | } | |
426 | ||
427 | static int input_handlers_read(char *buf, char **start, off_t pos, int count, int *eof, void *data) | |
428 | { | |
429 | struct input_handler *handler; | |
430 | ||
431 | off_t at = 0; | |
432 | int len = 0, cnt = 0; | |
433 | int i = 0; | |
434 | ||
435 | list_for_each_entry(handler, &input_handler_list, node) { | |
436 | ||
437 | if (handler->fops) | |
438 | len = sprintf(buf, "N: Number=%d Name=%s Minor=%d\n", | |
439 | i++, handler->name, handler->minor); | |
440 | else | |
441 | len = sprintf(buf, "N: Number=%d Name=%s\n", | |
442 | i++, handler->name); | |
443 | ||
444 | at += len; | |
445 | ||
446 | if (at >= pos) { | |
447 | if (!*start) { | |
448 | *start = buf + (pos - (at - len)); | |
449 | cnt = at - pos; | |
450 | } else cnt += len; | |
451 | buf += len; | |
452 | if (cnt >= count) | |
453 | break; | |
454 | } | |
455 | } | |
456 | if (&handler->node == &input_handler_list) | |
457 | *eof = 1; | |
458 | ||
459 | return (count > cnt) ? cnt : count; | |
460 | } | |
461 | ||
462 | static struct file_operations input_fileops; | |
463 | ||
464 | static int __init input_proc_init(void) | |
465 | { | |
466 | struct proc_dir_entry *entry; | |
467 | ||
468 | proc_bus_input_dir = proc_mkdir("input", proc_bus); | |
469 | if (!proc_bus_input_dir) | |
470 | return -ENOMEM; | |
471 | ||
472 | proc_bus_input_dir->owner = THIS_MODULE; | |
473 | ||
474 | entry = create_proc_read_entry("devices", 0, proc_bus_input_dir, input_devices_read, NULL); | |
475 | if (!entry) | |
476 | goto fail1; | |
477 | ||
478 | entry->owner = THIS_MODULE; | |
479 | input_fileops = *entry->proc_fops; | |
e2bd470e | 480 | input_fileops.poll = input_devices_poll; |
f96b434d | 481 | entry->proc_fops = &input_fileops; |
f96b434d DT |
482 | |
483 | entry = create_proc_read_entry("handlers", 0, proc_bus_input_dir, input_handlers_read, NULL); | |
484 | if (!entry) | |
485 | goto fail2; | |
486 | ||
487 | entry->owner = THIS_MODULE; | |
488 | ||
489 | return 0; | |
490 | ||
491 | fail2: remove_proc_entry("devices", proc_bus_input_dir); | |
492 | fail1: remove_proc_entry("input", proc_bus); | |
493 | return -ENOMEM; | |
494 | } | |
495 | ||
beffbdc2 | 496 | static void input_proc_exit(void) |
f96b434d DT |
497 | { |
498 | remove_proc_entry("devices", proc_bus_input_dir); | |
499 | remove_proc_entry("handlers", proc_bus_input_dir); | |
500 | remove_proc_entry("input", proc_bus); | |
501 | } | |
502 | ||
503 | #else /* !CONFIG_PROC_FS */ | |
504 | static inline void input_wakeup_procfs_readers(void) { } | |
505 | static inline int input_proc_init(void) { return 0; } | |
506 | static inline void input_proc_exit(void) { } | |
507 | #endif | |
508 | ||
5c1e9a6a DT |
509 | #define INPUT_DEV_STRING_ATTR_SHOW(name) \ |
510 | static ssize_t input_dev_show_##name(struct class_device *dev, char *buf) \ | |
511 | { \ | |
512 | struct input_dev *input_dev = to_input_dev(dev); \ | |
513 | int retval; \ | |
514 | \ | |
515 | retval = down_interruptible(&input_dev->sem); \ | |
516 | if (retval) \ | |
517 | return retval; \ | |
518 | \ | |
519 | retval = sprintf(buf, "%s\n", input_dev->name ? input_dev->name : ""); \ | |
520 | \ | |
521 | up(&input_dev->sem); \ | |
522 | \ | |
523 | return retval; \ | |
629b77a4 GKH |
524 | } \ |
525 | static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL); | |
5c1e9a6a DT |
526 | |
527 | INPUT_DEV_STRING_ATTR_SHOW(name); | |
528 | INPUT_DEV_STRING_ATTR_SHOW(phys); | |
529 | INPUT_DEV_STRING_ATTR_SHOW(uniq); | |
530 | ||
bd37e5a9 | 531 | static int print_modalias_bits(char *buf, int size, char prefix, unsigned long *arr, |
1d8f430c RR |
532 | unsigned int min, unsigned int max) |
533 | { | |
534 | int len, i; | |
535 | ||
bd37e5a9 | 536 | len = snprintf(buf, size, "%c", prefix); |
1d8f430c RR |
537 | for (i = min; i < max; i++) |
538 | if (arr[LONG(i)] & BIT(i)) | |
bd37e5a9 | 539 | len += snprintf(buf + len, size - len, "%X,", i); |
1d8f430c RR |
540 | return len; |
541 | } | |
542 | ||
bd37e5a9 | 543 | static int print_modalias(char *buf, int size, struct input_dev *id) |
1d8f430c | 544 | { |
bd37e5a9 | 545 | int len; |
1d8f430c | 546 | |
bd37e5a9 | 547 | len = snprintf(buf, size, "input:b%04Xv%04Xp%04Xe%04X-", |
1d8f430c RR |
548 | id->id.bustype, |
549 | id->id.vendor, | |
550 | id->id.product, | |
551 | id->id.version); | |
552 | ||
bd37e5a9 KS |
553 | len += print_modalias_bits(buf + len, size - len, 'e', id->evbit, |
554 | 0, EV_MAX); | |
555 | len += print_modalias_bits(buf + len, size - len, 'k', id->keybit, | |
1d8f430c | 556 | KEY_MIN_INTERESTING, KEY_MAX); |
bd37e5a9 KS |
557 | len += print_modalias_bits(buf + len, size - len, 'r', id->relbit, |
558 | 0, REL_MAX); | |
559 | len += print_modalias_bits(buf + len, size - len, 'a', id->absbit, | |
560 | 0, ABS_MAX); | |
561 | len += print_modalias_bits(buf + len, size - len, 'm', id->mscbit, | |
562 | 0, MSC_MAX); | |
563 | len += print_modalias_bits(buf + len, size - len, 'l', id->ledbit, | |
564 | 0, LED_MAX); | |
565 | len += print_modalias_bits(buf + len, size - len, 's', id->sndbit, | |
566 | 0, SND_MAX); | |
567 | len += print_modalias_bits(buf + len, size - len, 'f', id->ffbit, | |
568 | 0, FF_MAX); | |
569 | len += print_modalias_bits(buf + len, size - len, 'w', id->swbit, | |
570 | 0, SW_MAX); | |
571 | return len; | |
572 | } | |
573 | ||
574 | static ssize_t input_dev_show_modalias(struct class_device *dev, char *buf) | |
575 | { | |
576 | struct input_dev *id = to_input_dev(dev); | |
577 | ssize_t len; | |
578 | ||
579 | len = print_modalias(buf, PAGE_SIZE, id); | |
580 | len += snprintf(buf + len, PAGE_SIZE-len, "\n"); | |
1d8f430c RR |
581 | return len; |
582 | } | |
583 | static CLASS_DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL); | |
584 | ||
629b77a4 GKH |
585 | static struct attribute *input_dev_attrs[] = { |
586 | &class_device_attr_name.attr, | |
587 | &class_device_attr_phys.attr, | |
588 | &class_device_attr_uniq.attr, | |
1d8f430c | 589 | &class_device_attr_modalias.attr, |
629b77a4 GKH |
590 | NULL |
591 | }; | |
592 | ||
bd0ef235 | 593 | static struct attribute_group input_dev_attr_group = { |
629b77a4 | 594 | .attrs = input_dev_attrs, |
5c1e9a6a DT |
595 | }; |
596 | ||
597 | #define INPUT_DEV_ID_ATTR(name) \ | |
598 | static ssize_t input_dev_show_id_##name(struct class_device *dev, char *buf) \ | |
599 | { \ | |
600 | struct input_dev *input_dev = to_input_dev(dev); \ | |
601 | return sprintf(buf, "%04x\n", input_dev->id.name); \ | |
602 | } \ | |
603 | static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL); | |
604 | ||
605 | INPUT_DEV_ID_ATTR(bustype); | |
606 | INPUT_DEV_ID_ATTR(vendor); | |
607 | INPUT_DEV_ID_ATTR(product); | |
608 | INPUT_DEV_ID_ATTR(version); | |
609 | ||
610 | static struct attribute *input_dev_id_attrs[] = { | |
611 | &class_device_attr_bustype.attr, | |
612 | &class_device_attr_vendor.attr, | |
613 | &class_device_attr_product.attr, | |
614 | &class_device_attr_version.attr, | |
615 | NULL | |
616 | }; | |
617 | ||
618 | static struct attribute_group input_dev_id_attr_group = { | |
619 | .name = "id", | |
620 | .attrs = input_dev_id_attrs, | |
621 | }; | |
622 | ||
623 | #define INPUT_DEV_CAP_ATTR(ev, bm) \ | |
624 | static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf) \ | |
625 | { \ | |
626 | struct input_dev *input_dev = to_input_dev(dev); \ | |
a7fadbe1 | 627 | return input_print_bitmap(buf, PAGE_SIZE, input_dev->bm##bit, ev##_MAX);\ |
5c1e9a6a DT |
628 | } \ |
629 | static CLASS_DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL); | |
630 | ||
631 | INPUT_DEV_CAP_ATTR(EV, ev); | |
632 | INPUT_DEV_CAP_ATTR(KEY, key); | |
633 | INPUT_DEV_CAP_ATTR(REL, rel); | |
634 | INPUT_DEV_CAP_ATTR(ABS, abs); | |
635 | INPUT_DEV_CAP_ATTR(MSC, msc); | |
636 | INPUT_DEV_CAP_ATTR(LED, led); | |
637 | INPUT_DEV_CAP_ATTR(SND, snd); | |
638 | INPUT_DEV_CAP_ATTR(FF, ff); | |
639 | INPUT_DEV_CAP_ATTR(SW, sw); | |
640 | ||
641 | static struct attribute *input_dev_caps_attrs[] = { | |
642 | &class_device_attr_ev.attr, | |
643 | &class_device_attr_key.attr, | |
644 | &class_device_attr_rel.attr, | |
645 | &class_device_attr_abs.attr, | |
646 | &class_device_attr_msc.attr, | |
647 | &class_device_attr_led.attr, | |
648 | &class_device_attr_snd.attr, | |
649 | &class_device_attr_ff.attr, | |
650 | &class_device_attr_sw.attr, | |
651 | NULL | |
652 | }; | |
653 | ||
654 | static struct attribute_group input_dev_caps_attr_group = { | |
655 | .name = "capabilities", | |
656 | .attrs = input_dev_caps_attrs, | |
657 | }; | |
658 | ||
d19fbe8a DT |
659 | static void input_dev_release(struct class_device *class_dev) |
660 | { | |
661 | struct input_dev *dev = to_input_dev(class_dev); | |
662 | ||
663 | kfree(dev); | |
664 | module_put(THIS_MODULE); | |
665 | } | |
666 | ||
a7fadbe1 | 667 | /* |
312c004d | 668 | * Input uevent interface - loading event handlers based on |
a7fadbe1 DT |
669 | * device bitfields. |
670 | */ | |
312c004d | 671 | static int input_add_uevent_bm_var(char **envp, int num_envp, int *cur_index, |
a7fadbe1 DT |
672 | char *buffer, int buffer_size, int *cur_len, |
673 | const char *name, unsigned long *bitmap, int max) | |
674 | { | |
675 | if (*cur_index >= num_envp - 1) | |
676 | return -ENOMEM; | |
677 | ||
678 | envp[*cur_index] = buffer + *cur_len; | |
679 | ||
680 | *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), name); | |
681 | if (*cur_len > buffer_size) | |
682 | return -ENOMEM; | |
683 | ||
684 | *cur_len += input_print_bitmap(buffer + *cur_len, | |
685 | max(buffer_size - *cur_len, 0), | |
686 | bitmap, max) + 1; | |
687 | if (*cur_len > buffer_size) | |
688 | return -ENOMEM; | |
689 | ||
690 | (*cur_index)++; | |
691 | return 0; | |
692 | } | |
693 | ||
694 | #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \ | |
695 | do { \ | |
312c004d | 696 | int err = add_uevent_var(envp, num_envp, &i, \ |
a7fadbe1 DT |
697 | buffer, buffer_size, &len, \ |
698 | fmt, val); \ | |
699 | if (err) \ | |
700 | return err; \ | |
701 | } while (0) | |
702 | ||
703 | #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \ | |
704 | do { \ | |
312c004d | 705 | int err = input_add_uevent_bm_var(envp, num_envp, &i, \ |
a7fadbe1 DT |
706 | buffer, buffer_size, &len, \ |
707 | name, bm, max); \ | |
708 | if (err) \ | |
709 | return err; \ | |
710 | } while (0) | |
711 | ||
312c004d KS |
712 | static int input_dev_uevent(struct class_device *cdev, char **envp, |
713 | int num_envp, char *buffer, int buffer_size) | |
a7fadbe1 DT |
714 | { |
715 | struct input_dev *dev = to_input_dev(cdev); | |
716 | int i = 0; | |
717 | int len = 0; | |
718 | ||
719 | INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x", | |
720 | dev->id.bustype, dev->id.vendor, | |
721 | dev->id.product, dev->id.version); | |
722 | if (dev->name) | |
723 | INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name); | |
724 | if (dev->phys) | |
725 | INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys); | |
08de1f04 | 726 | if (dev->uniq) |
a7fadbe1 DT |
727 | INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq); |
728 | ||
729 | INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX); | |
730 | if (test_bit(EV_KEY, dev->evbit)) | |
731 | INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX); | |
732 | if (test_bit(EV_REL, dev->evbit)) | |
733 | INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX); | |
734 | if (test_bit(EV_ABS, dev->evbit)) | |
735 | INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX); | |
736 | if (test_bit(EV_MSC, dev->evbit)) | |
737 | INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX); | |
738 | if (test_bit(EV_LED, dev->evbit)) | |
739 | INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX); | |
740 | if (test_bit(EV_SND, dev->evbit)) | |
741 | INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX); | |
742 | if (test_bit(EV_FF, dev->evbit)) | |
743 | INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX); | |
744 | if (test_bit(EV_SW, dev->evbit)) | |
745 | INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX); | |
746 | ||
bd37e5a9 KS |
747 | envp[i++] = buffer + len; |
748 | len += snprintf(buffer + len, buffer_size - len, "MODALIAS="); | |
749 | len += print_modalias(buffer + len, buffer_size - len, dev) + 1; | |
a7fadbe1 | 750 | |
bd37e5a9 | 751 | envp[i] = NULL; |
a7fadbe1 DT |
752 | return 0; |
753 | } | |
754 | ||
ea9f240b GKH |
755 | struct class input_class = { |
756 | .name = "input", | |
d19fbe8a | 757 | .release = input_dev_release, |
312c004d | 758 | .uevent = input_dev_uevent, |
d19fbe8a DT |
759 | }; |
760 | ||
761 | struct input_dev *input_allocate_device(void) | |
762 | { | |
763 | struct input_dev *dev; | |
764 | ||
765 | dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL); | |
766 | if (dev) { | |
767 | dev->dynalloc = 1; | |
ea9f240b | 768 | dev->cdev.class = &input_class; |
d19fbe8a DT |
769 | class_device_initialize(&dev->cdev); |
770 | INIT_LIST_HEAD(&dev->h_list); | |
771 | INIT_LIST_HEAD(&dev->node); | |
772 | } | |
773 | ||
774 | return dev; | |
775 | } | |
776 | ||
5f945489 | 777 | int input_register_device(struct input_dev *dev) |
1da177e4 | 778 | { |
bd0ef235 | 779 | static atomic_t input_no = ATOMIC_INIT(0); |
1da177e4 LT |
780 | struct input_handle *handle; |
781 | struct input_handler *handler; | |
782 | struct input_device_id *id; | |
bd0ef235 DT |
783 | const char *path; |
784 | int error; | |
1da177e4 | 785 | |
5f945489 DT |
786 | if (!dev->dynalloc) { |
787 | printk(KERN_WARNING "input: device %s is statically allocated, will not register\n" | |
788 | "Please convert to input_allocate_device() or contact dtor_core@ameritech.net\n", | |
789 | dev->name ? dev->name : "<Unknown>"); | |
790 | return -EINVAL; | |
791 | } | |
1da177e4 | 792 | |
0fbf87ca | 793 | init_MUTEX(&dev->sem); |
5f945489 | 794 | set_bit(EV_SYN, dev->evbit); |
0fbf87ca | 795 | |
1da177e4 LT |
796 | /* |
797 | * If delay and period are pre-set by the driver, then autorepeating | |
798 | * is handled by the driver itself and we don't do it in input.c. | |
799 | */ | |
800 | ||
801 | init_timer(&dev->timer); | |
802 | if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) { | |
803 | dev->timer.data = (long) dev; | |
804 | dev->timer.function = input_repeat_key; | |
805 | dev->rep[REP_DELAY] = 250; | |
806 | dev->rep[REP_PERIOD] = 33; | |
807 | } | |
808 | ||
809 | INIT_LIST_HEAD(&dev->h_list); | |
810 | list_add_tail(&dev->node, &input_dev_list); | |
811 | ||
bd0ef235 DT |
812 | dev->cdev.class = &input_class; |
813 | snprintf(dev->cdev.class_id, sizeof(dev->cdev.class_id), | |
814 | "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1); | |
815 | ||
816 | error = class_device_add(&dev->cdev); | |
817 | if (error) | |
818 | return error; | |
819 | ||
820 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_attr_group); | |
821 | if (error) | |
822 | goto fail1; | |
823 | ||
824 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_id_attr_group); | |
825 | if (error) | |
826 | goto fail2; | |
827 | ||
828 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_caps_attr_group); | |
829 | if (error) | |
830 | goto fail3; | |
831 | ||
832 | __module_get(THIS_MODULE); | |
833 | ||
834 | path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL); | |
835 | printk(KERN_INFO "input: %s as %s\n", | |
836 | dev->name ? dev->name : "Unspecified device", path ? path : "N/A"); | |
837 | kfree(path); | |
10204020 | 838 | |
1da177e4 LT |
839 | list_for_each_entry(handler, &input_handler_list, node) |
840 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) | |
841 | if ((id = input_match_device(handler->id_table, dev))) | |
842 | if ((handle = handler->connect(handler, dev, id))) | |
843 | input_link_handle(handle); | |
844 | ||
f96b434d | 845 | input_wakeup_procfs_readers(); |
5f945489 DT |
846 | |
847 | return 0; | |
bd0ef235 DT |
848 | |
849 | fail3: sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group); | |
850 | fail2: sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group); | |
851 | fail1: class_device_del(&dev->cdev); | |
852 | return error; | |
1da177e4 LT |
853 | } |
854 | ||
855 | void input_unregister_device(struct input_dev *dev) | |
856 | { | |
857 | struct list_head * node, * next; | |
858 | ||
859 | if (!dev) return; | |
860 | ||
861 | del_timer_sync(&dev->timer); | |
862 | ||
863 | list_for_each_safe(node, next, &dev->h_list) { | |
864 | struct input_handle * handle = to_handle(node); | |
865 | list_del_init(&handle->d_node); | |
866 | list_del_init(&handle->h_node); | |
867 | handle->handler->disconnect(handle); | |
868 | } | |
869 | ||
1da177e4 LT |
870 | list_del_init(&dev->node); |
871 | ||
5f945489 DT |
872 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group); |
873 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group); | |
bd0ef235 | 874 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group); |
5f945489 | 875 | class_device_unregister(&dev->cdev); |
d19fbe8a | 876 | |
f96b434d | 877 | input_wakeup_procfs_readers(); |
1da177e4 LT |
878 | } |
879 | ||
880 | void input_register_handler(struct input_handler *handler) | |
881 | { | |
882 | struct input_dev *dev; | |
883 | struct input_handle *handle; | |
884 | struct input_device_id *id; | |
885 | ||
886 | if (!handler) return; | |
887 | ||
888 | INIT_LIST_HEAD(&handler->h_list); | |
889 | ||
890 | if (handler->fops != NULL) | |
891 | input_table[handler->minor >> 5] = handler; | |
892 | ||
893 | list_add_tail(&handler->node, &input_handler_list); | |
894 | ||
895 | list_for_each_entry(dev, &input_dev_list, node) | |
896 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) | |
897 | if ((id = input_match_device(handler->id_table, dev))) | |
898 | if ((handle = handler->connect(handler, dev, id))) | |
899 | input_link_handle(handle); | |
900 | ||
f96b434d | 901 | input_wakeup_procfs_readers(); |
1da177e4 LT |
902 | } |
903 | ||
904 | void input_unregister_handler(struct input_handler *handler) | |
905 | { | |
906 | struct list_head * node, * next; | |
907 | ||
908 | list_for_each_safe(node, next, &handler->h_list) { | |
909 | struct input_handle * handle = to_handle_h(node); | |
910 | list_del_init(&handle->h_node); | |
911 | list_del_init(&handle->d_node); | |
912 | handler->disconnect(handle); | |
913 | } | |
914 | ||
915 | list_del_init(&handler->node); | |
916 | ||
917 | if (handler->fops != NULL) | |
918 | input_table[handler->minor >> 5] = NULL; | |
919 | ||
f96b434d | 920 | input_wakeup_procfs_readers(); |
1da177e4 LT |
921 | } |
922 | ||
923 | static int input_open_file(struct inode *inode, struct file *file) | |
924 | { | |
925 | struct input_handler *handler = input_table[iminor(inode) >> 5]; | |
926 | struct file_operations *old_fops, *new_fops = NULL; | |
927 | int err; | |
928 | ||
929 | /* No load-on-demand here? */ | |
930 | if (!handler || !(new_fops = fops_get(handler->fops))) | |
931 | return -ENODEV; | |
932 | ||
933 | /* | |
934 | * That's _really_ odd. Usually NULL ->open means "nothing special", | |
935 | * not "no device". Oh, well... | |
936 | */ | |
937 | if (!new_fops->open) { | |
938 | fops_put(new_fops); | |
939 | return -ENODEV; | |
940 | } | |
941 | old_fops = file->f_op; | |
942 | file->f_op = new_fops; | |
943 | ||
944 | err = new_fops->open(inode, file); | |
945 | ||
946 | if (err) { | |
947 | fops_put(file->f_op); | |
948 | file->f_op = fops_get(old_fops); | |
949 | } | |
950 | fops_put(old_fops); | |
951 | return err; | |
952 | } | |
953 | ||
954 | static struct file_operations input_fops = { | |
955 | .owner = THIS_MODULE, | |
956 | .open = input_open_file, | |
957 | }; | |
958 | ||
f96b434d | 959 | static int __init input_init(void) |
1da177e4 | 960 | { |
f96b434d | 961 | int err; |
1da177e4 | 962 | |
ea9f240b | 963 | err = class_register(&input_class); |
d19fbe8a DT |
964 | if (err) { |
965 | printk(KERN_ERR "input: unable to register input_dev class\n"); | |
966 | return err; | |
967 | } | |
968 | ||
f96b434d DT |
969 | err = input_proc_init(); |
970 | if (err) | |
b0fdfebb | 971 | goto fail1; |
1da177e4 | 972 | |
f96b434d DT |
973 | err = register_chrdev(INPUT_MAJOR, "input", &input_fops); |
974 | if (err) { | |
975 | printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR); | |
b0fdfebb | 976 | goto fail2; |
1da177e4 | 977 | } |
e334016f | 978 | |
1da177e4 | 979 | return 0; |
1da177e4 | 980 | |
b0fdfebb | 981 | fail2: input_proc_exit(); |
ea9f240b | 982 | fail1: class_unregister(&input_class); |
f96b434d | 983 | return err; |
1da177e4 LT |
984 | } |
985 | ||
986 | static void __exit input_exit(void) | |
987 | { | |
f96b434d | 988 | input_proc_exit(); |
1da177e4 | 989 | unregister_chrdev(INPUT_MAJOR, "input"); |
ea9f240b | 990 | class_unregister(&input_class); |
1da177e4 LT |
991 | } |
992 | ||
993 | subsys_initcall(input_init); | |
994 | module_exit(input_exit); |