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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> | |
21 | #include <linux/kobject_uevent.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/poll.h> | |
24 | #include <linux/device.h> | |
1da177e4 LT |
25 | |
26 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); | |
27 | MODULE_DESCRIPTION("Input core"); | |
28 | MODULE_LICENSE("GPL"); | |
29 | ||
d19fbe8a | 30 | EXPORT_SYMBOL(input_allocate_device); |
1da177e4 LT |
31 | EXPORT_SYMBOL(input_register_device); |
32 | EXPORT_SYMBOL(input_unregister_device); | |
33 | EXPORT_SYMBOL(input_register_handler); | |
34 | EXPORT_SYMBOL(input_unregister_handler); | |
35 | EXPORT_SYMBOL(input_grab_device); | |
36 | EXPORT_SYMBOL(input_release_device); | |
37 | EXPORT_SYMBOL(input_open_device); | |
38 | EXPORT_SYMBOL(input_close_device); | |
39 | EXPORT_SYMBOL(input_accept_process); | |
40 | EXPORT_SYMBOL(input_flush_device); | |
41 | EXPORT_SYMBOL(input_event); | |
ea9f240b | 42 | EXPORT_SYMBOL_GPL(input_class); |
1da177e4 LT |
43 | |
44 | #define INPUT_DEVICES 256 | |
45 | ||
46 | static LIST_HEAD(input_dev_list); | |
47 | static LIST_HEAD(input_handler_list); | |
48 | ||
49 | static struct input_handler *input_table[8]; | |
50 | ||
1da177e4 LT |
51 | void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) |
52 | { | |
53 | struct input_handle *handle; | |
54 | ||
55 | if (type > EV_MAX || !test_bit(type, dev->evbit)) | |
56 | return; | |
57 | ||
58 | add_input_randomness(type, code, value); | |
59 | ||
60 | switch (type) { | |
61 | ||
62 | case EV_SYN: | |
63 | switch (code) { | |
64 | case SYN_CONFIG: | |
65 | if (dev->event) dev->event(dev, type, code, value); | |
66 | break; | |
67 | ||
68 | case SYN_REPORT: | |
69 | if (dev->sync) return; | |
70 | dev->sync = 1; | |
71 | break; | |
72 | } | |
73 | break; | |
74 | ||
75 | case EV_KEY: | |
76 | ||
77 | if (code > KEY_MAX || !test_bit(code, dev->keybit) || !!test_bit(code, dev->key) == value) | |
78 | return; | |
79 | ||
80 | if (value == 2) | |
81 | break; | |
82 | ||
83 | change_bit(code, dev->key); | |
84 | ||
85 | if (test_bit(EV_REP, dev->evbit) && dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && dev->timer.data && value) { | |
86 | dev->repeat_key = code; | |
87 | mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_DELAY])); | |
88 | } | |
89 | ||
90 | break; | |
91 | ||
31581066 RP |
92 | case EV_SW: |
93 | ||
94 | if (code > SW_MAX || !test_bit(code, dev->swbit) || !!test_bit(code, dev->sw) == value) | |
95 | return; | |
96 | ||
97 | change_bit(code, dev->sw); | |
98 | ||
99 | break; | |
100 | ||
1da177e4 LT |
101 | case EV_ABS: |
102 | ||
103 | if (code > ABS_MAX || !test_bit(code, dev->absbit)) | |
104 | return; | |
105 | ||
106 | if (dev->absfuzz[code]) { | |
107 | if ((value > dev->abs[code] - (dev->absfuzz[code] >> 1)) && | |
108 | (value < dev->abs[code] + (dev->absfuzz[code] >> 1))) | |
109 | return; | |
110 | ||
111 | if ((value > dev->abs[code] - dev->absfuzz[code]) && | |
112 | (value < dev->abs[code] + dev->absfuzz[code])) | |
113 | value = (dev->abs[code] * 3 + value) >> 2; | |
114 | ||
115 | if ((value > dev->abs[code] - (dev->absfuzz[code] << 1)) && | |
116 | (value < dev->abs[code] + (dev->absfuzz[code] << 1))) | |
117 | value = (dev->abs[code] + value) >> 1; | |
118 | } | |
119 | ||
120 | if (dev->abs[code] == value) | |
121 | return; | |
122 | ||
123 | dev->abs[code] = value; | |
124 | break; | |
125 | ||
126 | case EV_REL: | |
127 | ||
128 | if (code > REL_MAX || !test_bit(code, dev->relbit) || (value == 0)) | |
129 | return; | |
130 | ||
131 | break; | |
132 | ||
133 | case EV_MSC: | |
134 | ||
135 | if (code > MSC_MAX || !test_bit(code, dev->mscbit)) | |
136 | return; | |
137 | ||
138 | if (dev->event) dev->event(dev, type, code, value); | |
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); | |
148 | if (dev->event) dev->event(dev, type, code, value); | |
149 | ||
150 | break; | |
151 | ||
152 | case EV_SND: | |
153 | ||
154 | if (code > SND_MAX || !test_bit(code, dev->sndbit)) | |
155 | return; | |
156 | ||
157 | if (dev->event) dev->event(dev, type, code, value); | |
158 | ||
159 | break; | |
160 | ||
161 | case EV_REP: | |
162 | ||
163 | if (code > REP_MAX || value < 0 || dev->rep[code] == value) return; | |
164 | ||
165 | dev->rep[code] = value; | |
166 | if (dev->event) dev->event(dev, type, code, value); | |
167 | ||
168 | break; | |
169 | ||
170 | case EV_FF: | |
171 | if (dev->event) dev->event(dev, type, code, value); | |
172 | break; | |
173 | } | |
174 | ||
175 | if (type != EV_SYN) | |
176 | dev->sync = 0; | |
177 | ||
178 | if (dev->grab) | |
179 | dev->grab->handler->event(dev->grab, type, code, value); | |
180 | else | |
181 | list_for_each_entry(handle, &dev->h_list, d_node) | |
182 | if (handle->open) | |
183 | handle->handler->event(handle, type, code, value); | |
184 | } | |
185 | ||
186 | static void input_repeat_key(unsigned long data) | |
187 | { | |
188 | struct input_dev *dev = (void *) data; | |
189 | ||
190 | if (!test_bit(dev->repeat_key, dev->key)) | |
191 | return; | |
192 | ||
193 | input_event(dev, EV_KEY, dev->repeat_key, 2); | |
194 | input_sync(dev); | |
195 | ||
196 | if (dev->rep[REP_PERIOD]) | |
197 | mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_PERIOD])); | |
198 | } | |
199 | ||
200 | int input_accept_process(struct input_handle *handle, struct file *file) | |
201 | { | |
202 | if (handle->dev->accept) | |
203 | return handle->dev->accept(handle->dev, file); | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | int input_grab_device(struct input_handle *handle) | |
209 | { | |
210 | if (handle->dev->grab) | |
211 | return -EBUSY; | |
212 | ||
213 | handle->dev->grab = handle; | |
214 | return 0; | |
215 | } | |
216 | ||
217 | void input_release_device(struct input_handle *handle) | |
218 | { | |
219 | if (handle->dev->grab == handle) | |
220 | handle->dev->grab = NULL; | |
221 | } | |
222 | ||
223 | int input_open_device(struct input_handle *handle) | |
224 | { | |
0fbf87ca DT |
225 | struct input_dev *dev = handle->dev; |
226 | int err; | |
227 | ||
228 | err = down_interruptible(&dev->sem); | |
229 | if (err) | |
230 | return err; | |
231 | ||
1da177e4 | 232 | handle->open++; |
0fbf87ca DT |
233 | |
234 | if (!dev->users++ && dev->open) | |
235 | err = dev->open(dev); | |
236 | ||
237 | if (err) | |
238 | handle->open--; | |
239 | ||
240 | up(&dev->sem); | |
241 | ||
242 | return err; | |
1da177e4 LT |
243 | } |
244 | ||
245 | int input_flush_device(struct input_handle* handle, struct file* file) | |
246 | { | |
247 | if (handle->dev->flush) | |
248 | return handle->dev->flush(handle->dev, file); | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | void input_close_device(struct input_handle *handle) | |
254 | { | |
0fbf87ca DT |
255 | struct input_dev *dev = handle->dev; |
256 | ||
1da177e4 | 257 | input_release_device(handle); |
0fbf87ca DT |
258 | |
259 | down(&dev->sem); | |
260 | ||
261 | if (!--dev->users && dev->close) | |
262 | dev->close(dev); | |
1da177e4 | 263 | handle->open--; |
0fbf87ca DT |
264 | |
265 | up(&dev->sem); | |
1da177e4 LT |
266 | } |
267 | ||
268 | static void input_link_handle(struct input_handle *handle) | |
269 | { | |
270 | list_add_tail(&handle->d_node, &handle->dev->h_list); | |
271 | list_add_tail(&handle->h_node, &handle->handler->h_list); | |
272 | } | |
273 | ||
274 | #define MATCH_BIT(bit, max) \ | |
275 | for (i = 0; i < NBITS(max); i++) \ | |
276 | if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \ | |
277 | break; \ | |
278 | if (i != NBITS(max)) \ | |
279 | continue; | |
280 | ||
281 | static struct input_device_id *input_match_device(struct input_device_id *id, struct input_dev *dev) | |
282 | { | |
283 | int i; | |
284 | ||
285 | for (; id->flags || id->driver_info; id++) { | |
286 | ||
287 | if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) | |
288 | if (id->id.bustype != dev->id.bustype) | |
289 | continue; | |
290 | ||
291 | if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) | |
292 | if (id->id.vendor != dev->id.vendor) | |
293 | continue; | |
294 | ||
295 | if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) | |
296 | if (id->id.product != dev->id.product) | |
297 | continue; | |
298 | ||
299 | if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) | |
300 | if (id->id.version != dev->id.version) | |
301 | continue; | |
302 | ||
303 | MATCH_BIT(evbit, EV_MAX); | |
304 | MATCH_BIT(keybit, KEY_MAX); | |
305 | MATCH_BIT(relbit, REL_MAX); | |
306 | MATCH_BIT(absbit, ABS_MAX); | |
307 | MATCH_BIT(mscbit, MSC_MAX); | |
308 | MATCH_BIT(ledbit, LED_MAX); | |
309 | MATCH_BIT(sndbit, SND_MAX); | |
310 | MATCH_BIT(ffbit, FF_MAX); | |
ff13f98b | 311 | MATCH_BIT(swbit, SW_MAX); |
1da177e4 LT |
312 | |
313 | return id; | |
314 | } | |
315 | ||
316 | return NULL; | |
317 | } | |
318 | ||
a7fadbe1 | 319 | static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap, int max) |
5c1e9a6a DT |
320 | { |
321 | int i; | |
322 | int len = 0; | |
323 | ||
324 | for (i = NBITS(max) - 1; i > 0; i--) | |
325 | if (bitmap[i]) | |
326 | break; | |
327 | ||
328 | for (; i >= 0; i--) | |
a7fadbe1 DT |
329 | len += snprintf(buf + len, max(buf_size - len, 0), |
330 | "%lx%s", bitmap[i], i > 0 ? " " : ""); | |
5c1e9a6a DT |
331 | return len; |
332 | } | |
333 | ||
f96b434d DT |
334 | #ifdef CONFIG_PROC_FS |
335 | ||
336 | static struct proc_dir_entry *proc_bus_input_dir; | |
337 | static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait); | |
338 | static int input_devices_state; | |
339 | ||
340 | static inline void input_wakeup_procfs_readers(void) | |
341 | { | |
342 | input_devices_state++; | |
343 | wake_up(&input_devices_poll_wait); | |
344 | } | |
345 | ||
346 | static unsigned int input_devices_poll(struct file *file, poll_table *wait) | |
347 | { | |
348 | int state = input_devices_state; | |
349 | poll_wait(file, &input_devices_poll_wait, wait); | |
350 | if (state != input_devices_state) | |
351 | return POLLIN | POLLRDNORM; | |
352 | return 0; | |
353 | } | |
354 | ||
a7fadbe1 | 355 | #define SPRINTF_BIT(ev, bm) \ |
5c1e9a6a DT |
356 | do { \ |
357 | len += sprintf(buf + len, "B: %s=", #ev); \ | |
a7fadbe1 | 358 | len += input_print_bitmap(buf + len, INT_MAX, \ |
5c1e9a6a | 359 | dev->bm##bit, ev##_MAX); \ |
a7fadbe1 | 360 | len += sprintf(buf + len, "\n"); \ |
f96b434d DT |
361 | } while (0) |
362 | ||
a7fadbe1 | 363 | #define TEST_AND_SPRINTF_BIT(ev, bm) \ |
5c1e9a6a DT |
364 | do { \ |
365 | if (test_bit(EV_##ev, dev->evbit)) \ | |
a7fadbe1 | 366 | SPRINTF_BIT(ev, bm); \ |
f96b434d DT |
367 | } while (0) |
368 | ||
369 | static int input_devices_read(char *buf, char **start, off_t pos, int count, int *eof, void *data) | |
370 | { | |
371 | struct input_dev *dev; | |
372 | struct input_handle *handle; | |
051b2fea | 373 | const char *path; |
f96b434d DT |
374 | |
375 | off_t at = 0; | |
5c1e9a6a | 376 | int len, cnt = 0; |
f96b434d DT |
377 | |
378 | list_for_each_entry(dev, &input_dev_list, node) { | |
379 | ||
051b2fea DT |
380 | path = dev->dynalloc ? kobject_get_path(&dev->cdev.kobj, GFP_KERNEL) : NULL; |
381 | ||
f96b434d DT |
382 | len = sprintf(buf, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n", |
383 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); | |
384 | ||
385 | len += sprintf(buf + len, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); | |
386 | len += sprintf(buf + len, "P: Phys=%s\n", dev->phys ? dev->phys : ""); | |
051b2fea | 387 | len += sprintf(buf + len, "S: Sysfs=%s\n", path ? path : ""); |
f96b434d DT |
388 | len += sprintf(buf + len, "H: Handlers="); |
389 | ||
390 | list_for_each_entry(handle, &dev->h_list, d_node) | |
391 | len += sprintf(buf + len, "%s ", handle->name); | |
392 | ||
393 | len += sprintf(buf + len, "\n"); | |
394 | ||
a7fadbe1 DT |
395 | SPRINTF_BIT(EV, ev); |
396 | TEST_AND_SPRINTF_BIT(KEY, key); | |
397 | TEST_AND_SPRINTF_BIT(REL, rel); | |
398 | TEST_AND_SPRINTF_BIT(ABS, abs); | |
399 | TEST_AND_SPRINTF_BIT(MSC, msc); | |
400 | TEST_AND_SPRINTF_BIT(LED, led); | |
401 | TEST_AND_SPRINTF_BIT(SND, snd); | |
402 | TEST_AND_SPRINTF_BIT(FF, ff); | |
403 | TEST_AND_SPRINTF_BIT(SW, sw); | |
f96b434d DT |
404 | |
405 | len += sprintf(buf + len, "\n"); | |
406 | ||
407 | at += len; | |
408 | ||
409 | if (at >= pos) { | |
410 | if (!*start) { | |
411 | *start = buf + (pos - (at - len)); | |
412 | cnt = at - pos; | |
413 | } else cnt += len; | |
414 | buf += len; | |
415 | if (cnt >= count) | |
416 | break; | |
417 | } | |
051b2fea DT |
418 | |
419 | kfree(path); | |
f96b434d DT |
420 | } |
421 | ||
422 | if (&dev->node == &input_dev_list) | |
423 | *eof = 1; | |
424 | ||
425 | return (count > cnt) ? cnt : count; | |
426 | } | |
427 | ||
428 | static int input_handlers_read(char *buf, char **start, off_t pos, int count, int *eof, void *data) | |
429 | { | |
430 | struct input_handler *handler; | |
431 | ||
432 | off_t at = 0; | |
433 | int len = 0, cnt = 0; | |
434 | int i = 0; | |
435 | ||
436 | list_for_each_entry(handler, &input_handler_list, node) { | |
437 | ||
438 | if (handler->fops) | |
439 | len = sprintf(buf, "N: Number=%d Name=%s Minor=%d\n", | |
440 | i++, handler->name, handler->minor); | |
441 | else | |
442 | len = sprintf(buf, "N: Number=%d Name=%s\n", | |
443 | i++, handler->name); | |
444 | ||
445 | at += len; | |
446 | ||
447 | if (at >= pos) { | |
448 | if (!*start) { | |
449 | *start = buf + (pos - (at - len)); | |
450 | cnt = at - pos; | |
451 | } else cnt += len; | |
452 | buf += len; | |
453 | if (cnt >= count) | |
454 | break; | |
455 | } | |
456 | } | |
457 | if (&handler->node == &input_handler_list) | |
458 | *eof = 1; | |
459 | ||
460 | return (count > cnt) ? cnt : count; | |
461 | } | |
462 | ||
463 | static struct file_operations input_fileops; | |
464 | ||
465 | static int __init input_proc_init(void) | |
466 | { | |
467 | struct proc_dir_entry *entry; | |
468 | ||
469 | proc_bus_input_dir = proc_mkdir("input", proc_bus); | |
470 | if (!proc_bus_input_dir) | |
471 | return -ENOMEM; | |
472 | ||
473 | proc_bus_input_dir->owner = THIS_MODULE; | |
474 | ||
475 | entry = create_proc_read_entry("devices", 0, proc_bus_input_dir, input_devices_read, NULL); | |
476 | if (!entry) | |
477 | goto fail1; | |
478 | ||
479 | entry->owner = THIS_MODULE; | |
480 | input_fileops = *entry->proc_fops; | |
481 | entry->proc_fops = &input_fileops; | |
482 | entry->proc_fops->poll = input_devices_poll; | |
483 | ||
484 | entry = create_proc_read_entry("handlers", 0, proc_bus_input_dir, input_handlers_read, NULL); | |
485 | if (!entry) | |
486 | goto fail2; | |
487 | ||
488 | entry->owner = THIS_MODULE; | |
489 | ||
490 | return 0; | |
491 | ||
492 | fail2: remove_proc_entry("devices", proc_bus_input_dir); | |
493 | fail1: remove_proc_entry("input", proc_bus); | |
494 | return -ENOMEM; | |
495 | } | |
496 | ||
beffbdc2 | 497 | static void input_proc_exit(void) |
f96b434d DT |
498 | { |
499 | remove_proc_entry("devices", proc_bus_input_dir); | |
500 | remove_proc_entry("handlers", proc_bus_input_dir); | |
501 | remove_proc_entry("input", proc_bus); | |
502 | } | |
503 | ||
504 | #else /* !CONFIG_PROC_FS */ | |
505 | static inline void input_wakeup_procfs_readers(void) { } | |
506 | static inline int input_proc_init(void) { return 0; } | |
507 | static inline void input_proc_exit(void) { } | |
508 | #endif | |
509 | ||
5c1e9a6a DT |
510 | #define INPUT_DEV_STRING_ATTR_SHOW(name) \ |
511 | static ssize_t input_dev_show_##name(struct class_device *dev, char *buf) \ | |
512 | { \ | |
513 | struct input_dev *input_dev = to_input_dev(dev); \ | |
514 | int retval; \ | |
515 | \ | |
516 | retval = down_interruptible(&input_dev->sem); \ | |
517 | if (retval) \ | |
518 | return retval; \ | |
519 | \ | |
520 | retval = sprintf(buf, "%s\n", input_dev->name ? input_dev->name : ""); \ | |
521 | \ | |
522 | up(&input_dev->sem); \ | |
523 | \ | |
524 | return retval; \ | |
629b77a4 GKH |
525 | } \ |
526 | static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL); | |
5c1e9a6a DT |
527 | |
528 | INPUT_DEV_STRING_ATTR_SHOW(name); | |
529 | INPUT_DEV_STRING_ATTR_SHOW(phys); | |
530 | INPUT_DEV_STRING_ATTR_SHOW(uniq); | |
531 | ||
629b77a4 GKH |
532 | static struct attribute *input_dev_attrs[] = { |
533 | &class_device_attr_name.attr, | |
534 | &class_device_attr_phys.attr, | |
535 | &class_device_attr_uniq.attr, | |
536 | NULL | |
537 | }; | |
538 | ||
539 | static struct attribute_group input_dev_group = { | |
540 | .attrs = input_dev_attrs, | |
5c1e9a6a DT |
541 | }; |
542 | ||
543 | #define INPUT_DEV_ID_ATTR(name) \ | |
544 | static ssize_t input_dev_show_id_##name(struct class_device *dev, char *buf) \ | |
545 | { \ | |
546 | struct input_dev *input_dev = to_input_dev(dev); \ | |
547 | return sprintf(buf, "%04x\n", input_dev->id.name); \ | |
548 | } \ | |
549 | static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL); | |
550 | ||
551 | INPUT_DEV_ID_ATTR(bustype); | |
552 | INPUT_DEV_ID_ATTR(vendor); | |
553 | INPUT_DEV_ID_ATTR(product); | |
554 | INPUT_DEV_ID_ATTR(version); | |
555 | ||
556 | static struct attribute *input_dev_id_attrs[] = { | |
557 | &class_device_attr_bustype.attr, | |
558 | &class_device_attr_vendor.attr, | |
559 | &class_device_attr_product.attr, | |
560 | &class_device_attr_version.attr, | |
561 | NULL | |
562 | }; | |
563 | ||
564 | static struct attribute_group input_dev_id_attr_group = { | |
565 | .name = "id", | |
566 | .attrs = input_dev_id_attrs, | |
567 | }; | |
568 | ||
569 | #define INPUT_DEV_CAP_ATTR(ev, bm) \ | |
570 | static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf) \ | |
571 | { \ | |
572 | struct input_dev *input_dev = to_input_dev(dev); \ | |
a7fadbe1 | 573 | return input_print_bitmap(buf, PAGE_SIZE, input_dev->bm##bit, ev##_MAX);\ |
5c1e9a6a DT |
574 | } \ |
575 | static CLASS_DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL); | |
576 | ||
577 | INPUT_DEV_CAP_ATTR(EV, ev); | |
578 | INPUT_DEV_CAP_ATTR(KEY, key); | |
579 | INPUT_DEV_CAP_ATTR(REL, rel); | |
580 | INPUT_DEV_CAP_ATTR(ABS, abs); | |
581 | INPUT_DEV_CAP_ATTR(MSC, msc); | |
582 | INPUT_DEV_CAP_ATTR(LED, led); | |
583 | INPUT_DEV_CAP_ATTR(SND, snd); | |
584 | INPUT_DEV_CAP_ATTR(FF, ff); | |
585 | INPUT_DEV_CAP_ATTR(SW, sw); | |
586 | ||
587 | static struct attribute *input_dev_caps_attrs[] = { | |
588 | &class_device_attr_ev.attr, | |
589 | &class_device_attr_key.attr, | |
590 | &class_device_attr_rel.attr, | |
591 | &class_device_attr_abs.attr, | |
592 | &class_device_attr_msc.attr, | |
593 | &class_device_attr_led.attr, | |
594 | &class_device_attr_snd.attr, | |
595 | &class_device_attr_ff.attr, | |
596 | &class_device_attr_sw.attr, | |
597 | NULL | |
598 | }; | |
599 | ||
600 | static struct attribute_group input_dev_caps_attr_group = { | |
601 | .name = "capabilities", | |
602 | .attrs = input_dev_caps_attrs, | |
603 | }; | |
604 | ||
d19fbe8a DT |
605 | static void input_dev_release(struct class_device *class_dev) |
606 | { | |
607 | struct input_dev *dev = to_input_dev(class_dev); | |
608 | ||
609 | kfree(dev); | |
610 | module_put(THIS_MODULE); | |
611 | } | |
612 | ||
a7fadbe1 DT |
613 | /* |
614 | * Input hotplugging interface - loading event handlers based on | |
615 | * device bitfields. | |
616 | */ | |
617 | static int input_add_hotplug_bm_var(char **envp, int num_envp, int *cur_index, | |
618 | char *buffer, int buffer_size, int *cur_len, | |
619 | const char *name, unsigned long *bitmap, int max) | |
620 | { | |
621 | if (*cur_index >= num_envp - 1) | |
622 | return -ENOMEM; | |
623 | ||
624 | envp[*cur_index] = buffer + *cur_len; | |
625 | ||
626 | *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), name); | |
627 | if (*cur_len > buffer_size) | |
628 | return -ENOMEM; | |
629 | ||
630 | *cur_len += input_print_bitmap(buffer + *cur_len, | |
631 | max(buffer_size - *cur_len, 0), | |
632 | bitmap, max) + 1; | |
633 | if (*cur_len > buffer_size) | |
634 | return -ENOMEM; | |
635 | ||
636 | (*cur_index)++; | |
637 | return 0; | |
638 | } | |
639 | ||
640 | #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \ | |
641 | do { \ | |
642 | int err = add_hotplug_env_var(envp, num_envp, &i, \ | |
643 | buffer, buffer_size, &len, \ | |
644 | fmt, val); \ | |
645 | if (err) \ | |
646 | return err; \ | |
647 | } while (0) | |
648 | ||
649 | #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \ | |
650 | do { \ | |
651 | int err = input_add_hotplug_bm_var(envp, num_envp, &i, \ | |
652 | buffer, buffer_size, &len, \ | |
653 | name, bm, max); \ | |
654 | if (err) \ | |
655 | return err; \ | |
656 | } while (0) | |
657 | ||
658 | static int input_dev_hotplug(struct class_device *cdev, char **envp, | |
659 | int num_envp, char *buffer, int buffer_size) | |
660 | { | |
661 | struct input_dev *dev = to_input_dev(cdev); | |
662 | int i = 0; | |
663 | int len = 0; | |
664 | ||
665 | INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x", | |
666 | dev->id.bustype, dev->id.vendor, | |
667 | dev->id.product, dev->id.version); | |
668 | if (dev->name) | |
669 | INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name); | |
670 | if (dev->phys) | |
671 | INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys); | |
672 | if (dev->phys) | |
673 | INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq); | |
674 | ||
675 | INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX); | |
676 | if (test_bit(EV_KEY, dev->evbit)) | |
677 | INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX); | |
678 | if (test_bit(EV_REL, dev->evbit)) | |
679 | INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX); | |
680 | if (test_bit(EV_ABS, dev->evbit)) | |
681 | INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX); | |
682 | if (test_bit(EV_MSC, dev->evbit)) | |
683 | INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX); | |
684 | if (test_bit(EV_LED, dev->evbit)) | |
685 | INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX); | |
686 | if (test_bit(EV_SND, dev->evbit)) | |
687 | INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX); | |
688 | if (test_bit(EV_FF, dev->evbit)) | |
689 | INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX); | |
690 | if (test_bit(EV_SW, dev->evbit)) | |
691 | INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX); | |
692 | ||
693 | envp[i] = NULL; | |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
ea9f240b GKH |
698 | struct class input_class = { |
699 | .name = "input", | |
d19fbe8a | 700 | .release = input_dev_release, |
a7fadbe1 | 701 | .hotplug = input_dev_hotplug, |
d19fbe8a DT |
702 | }; |
703 | ||
704 | struct input_dev *input_allocate_device(void) | |
705 | { | |
706 | struct input_dev *dev; | |
707 | ||
708 | dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL); | |
709 | if (dev) { | |
710 | dev->dynalloc = 1; | |
ea9f240b | 711 | dev->cdev.class = &input_class; |
d19fbe8a DT |
712 | class_device_initialize(&dev->cdev); |
713 | INIT_LIST_HEAD(&dev->h_list); | |
714 | INIT_LIST_HEAD(&dev->node); | |
715 | } | |
716 | ||
717 | return dev; | |
718 | } | |
719 | ||
720 | static void input_register_classdevice(struct input_dev *dev) | |
721 | { | |
722 | static atomic_t input_no = ATOMIC_INIT(0); | |
723 | const char *path; | |
724 | ||
725 | __module_get(THIS_MODULE); | |
726 | ||
727 | dev->dev = dev->cdev.dev; | |
728 | ||
729 | snprintf(dev->cdev.class_id, sizeof(dev->cdev.class_id), | |
730 | "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1); | |
731 | ||
732 | path = kobject_get_path(&dev->cdev.class->subsys.kset.kobj, GFP_KERNEL); | |
995fc4df | 733 | printk(KERN_INFO "input: %s as %s/%s\n", |
d19fbe8a DT |
734 | dev->name ? dev->name : "Unspecified device", |
735 | path ? path : "", dev->cdev.class_id); | |
736 | kfree(path); | |
737 | ||
738 | class_device_add(&dev->cdev); | |
629b77a4 | 739 | sysfs_create_group(&dev->cdev.kobj, &input_dev_group); |
5c1e9a6a DT |
740 | sysfs_create_group(&dev->cdev.kobj, &input_dev_id_attr_group); |
741 | sysfs_create_group(&dev->cdev.kobj, &input_dev_caps_attr_group); | |
d19fbe8a DT |
742 | } |
743 | ||
1da177e4 LT |
744 | void input_register_device(struct input_dev *dev) |
745 | { | |
746 | struct input_handle *handle; | |
747 | struct input_handler *handler; | |
748 | struct input_device_id *id; | |
749 | ||
750 | set_bit(EV_SYN, dev->evbit); | |
751 | ||
0fbf87ca DT |
752 | init_MUTEX(&dev->sem); |
753 | ||
1da177e4 LT |
754 | /* |
755 | * If delay and period are pre-set by the driver, then autorepeating | |
756 | * is handled by the driver itself and we don't do it in input.c. | |
757 | */ | |
758 | ||
759 | init_timer(&dev->timer); | |
760 | if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) { | |
761 | dev->timer.data = (long) dev; | |
762 | dev->timer.function = input_repeat_key; | |
763 | dev->rep[REP_DELAY] = 250; | |
764 | dev->rep[REP_PERIOD] = 33; | |
765 | } | |
766 | ||
767 | INIT_LIST_HEAD(&dev->h_list); | |
768 | list_add_tail(&dev->node, &input_dev_list); | |
769 | ||
10204020 GKH |
770 | if (dev->dynalloc) |
771 | input_register_classdevice(dev); | |
772 | ||
1da177e4 LT |
773 | list_for_each_entry(handler, &input_handler_list, node) |
774 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) | |
775 | if ((id = input_match_device(handler->id_table, dev))) | |
776 | if ((handle = handler->connect(handler, dev, id))) | |
777 | input_link_handle(handle); | |
778 | ||
d19fbe8a | 779 | |
f96b434d | 780 | input_wakeup_procfs_readers(); |
1da177e4 LT |
781 | } |
782 | ||
783 | void input_unregister_device(struct input_dev *dev) | |
784 | { | |
785 | struct list_head * node, * next; | |
786 | ||
787 | if (!dev) return; | |
788 | ||
789 | del_timer_sync(&dev->timer); | |
790 | ||
791 | list_for_each_safe(node, next, &dev->h_list) { | |
792 | struct input_handle * handle = to_handle(node); | |
793 | list_del_init(&handle->d_node); | |
794 | list_del_init(&handle->h_node); | |
795 | handle->handler->disconnect(handle); | |
796 | } | |
797 | ||
1da177e4 LT |
798 | list_del_init(&dev->node); |
799 | ||
5c1e9a6a DT |
800 | if (dev->dynalloc) { |
801 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group); | |
802 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group); | |
d19fbe8a | 803 | class_device_unregister(&dev->cdev); |
5c1e9a6a | 804 | } |
d19fbe8a | 805 | |
f96b434d | 806 | input_wakeup_procfs_readers(); |
1da177e4 LT |
807 | } |
808 | ||
809 | void input_register_handler(struct input_handler *handler) | |
810 | { | |
811 | struct input_dev *dev; | |
812 | struct input_handle *handle; | |
813 | struct input_device_id *id; | |
814 | ||
815 | if (!handler) return; | |
816 | ||
817 | INIT_LIST_HEAD(&handler->h_list); | |
818 | ||
819 | if (handler->fops != NULL) | |
820 | input_table[handler->minor >> 5] = handler; | |
821 | ||
822 | list_add_tail(&handler->node, &input_handler_list); | |
823 | ||
824 | list_for_each_entry(dev, &input_dev_list, node) | |
825 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) | |
826 | if ((id = input_match_device(handler->id_table, dev))) | |
827 | if ((handle = handler->connect(handler, dev, id))) | |
828 | input_link_handle(handle); | |
829 | ||
f96b434d | 830 | input_wakeup_procfs_readers(); |
1da177e4 LT |
831 | } |
832 | ||
833 | void input_unregister_handler(struct input_handler *handler) | |
834 | { | |
835 | struct list_head * node, * next; | |
836 | ||
837 | list_for_each_safe(node, next, &handler->h_list) { | |
838 | struct input_handle * handle = to_handle_h(node); | |
839 | list_del_init(&handle->h_node); | |
840 | list_del_init(&handle->d_node); | |
841 | handler->disconnect(handle); | |
842 | } | |
843 | ||
844 | list_del_init(&handler->node); | |
845 | ||
846 | if (handler->fops != NULL) | |
847 | input_table[handler->minor >> 5] = NULL; | |
848 | ||
f96b434d | 849 | input_wakeup_procfs_readers(); |
1da177e4 LT |
850 | } |
851 | ||
852 | static int input_open_file(struct inode *inode, struct file *file) | |
853 | { | |
854 | struct input_handler *handler = input_table[iminor(inode) >> 5]; | |
855 | struct file_operations *old_fops, *new_fops = NULL; | |
856 | int err; | |
857 | ||
858 | /* No load-on-demand here? */ | |
859 | if (!handler || !(new_fops = fops_get(handler->fops))) | |
860 | return -ENODEV; | |
861 | ||
862 | /* | |
863 | * That's _really_ odd. Usually NULL ->open means "nothing special", | |
864 | * not "no device". Oh, well... | |
865 | */ | |
866 | if (!new_fops->open) { | |
867 | fops_put(new_fops); | |
868 | return -ENODEV; | |
869 | } | |
870 | old_fops = file->f_op; | |
871 | file->f_op = new_fops; | |
872 | ||
873 | err = new_fops->open(inode, file); | |
874 | ||
875 | if (err) { | |
876 | fops_put(file->f_op); | |
877 | file->f_op = fops_get(old_fops); | |
878 | } | |
879 | fops_put(old_fops); | |
880 | return err; | |
881 | } | |
882 | ||
883 | static struct file_operations input_fops = { | |
884 | .owner = THIS_MODULE, | |
885 | .open = input_open_file, | |
886 | }; | |
887 | ||
f96b434d | 888 | static int __init input_init(void) |
1da177e4 | 889 | { |
f96b434d | 890 | int err; |
1da177e4 | 891 | |
ea9f240b | 892 | err = class_register(&input_class); |
d19fbe8a DT |
893 | if (err) { |
894 | printk(KERN_ERR "input: unable to register input_dev class\n"); | |
895 | return err; | |
896 | } | |
897 | ||
f96b434d DT |
898 | err = input_proc_init(); |
899 | if (err) | |
b0fdfebb | 900 | goto fail1; |
1da177e4 | 901 | |
f96b434d DT |
902 | err = register_chrdev(INPUT_MAJOR, "input", &input_fops); |
903 | if (err) { | |
904 | printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR); | |
b0fdfebb | 905 | goto fail2; |
1da177e4 | 906 | } |
e334016f | 907 | |
1da177e4 | 908 | return 0; |
1da177e4 | 909 | |
b0fdfebb | 910 | fail2: input_proc_exit(); |
ea9f240b | 911 | fail1: class_unregister(&input_class); |
f96b434d | 912 | return err; |
1da177e4 LT |
913 | } |
914 | ||
915 | static void __exit input_exit(void) | |
916 | { | |
f96b434d | 917 | input_proc_exit(); |
1da177e4 | 918 | unregister_chrdev(INPUT_MAJOR, "input"); |
ea9f240b | 919 | class_unregister(&input_class); |
1da177e4 LT |
920 | } |
921 | ||
922 | subsys_initcall(input_init); | |
923 | module_exit(input_exit); |