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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> | |
25 | #include <linux/devfs_fs_kernel.h> | |
26 | ||
27 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); | |
28 | MODULE_DESCRIPTION("Input core"); | |
29 | MODULE_LICENSE("GPL"); | |
30 | ||
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); | |
42 | EXPORT_SYMBOL(input_class); | |
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 | ||
92 | case EV_ABS: | |
93 | ||
94 | if (code > ABS_MAX || !test_bit(code, dev->absbit)) | |
95 | return; | |
96 | ||
97 | if (dev->absfuzz[code]) { | |
98 | if ((value > dev->abs[code] - (dev->absfuzz[code] >> 1)) && | |
99 | (value < dev->abs[code] + (dev->absfuzz[code] >> 1))) | |
100 | return; | |
101 | ||
102 | if ((value > dev->abs[code] - dev->absfuzz[code]) && | |
103 | (value < dev->abs[code] + dev->absfuzz[code])) | |
104 | value = (dev->abs[code] * 3 + value) >> 2; | |
105 | ||
106 | if ((value > dev->abs[code] - (dev->absfuzz[code] << 1)) && | |
107 | (value < dev->abs[code] + (dev->absfuzz[code] << 1))) | |
108 | value = (dev->abs[code] + value) >> 1; | |
109 | } | |
110 | ||
111 | if (dev->abs[code] == value) | |
112 | return; | |
113 | ||
114 | dev->abs[code] = value; | |
115 | break; | |
116 | ||
117 | case EV_REL: | |
118 | ||
119 | if (code > REL_MAX || !test_bit(code, dev->relbit) || (value == 0)) | |
120 | return; | |
121 | ||
122 | break; | |
123 | ||
124 | case EV_MSC: | |
125 | ||
126 | if (code > MSC_MAX || !test_bit(code, dev->mscbit)) | |
127 | return; | |
128 | ||
129 | if (dev->event) dev->event(dev, type, code, value); | |
130 | ||
131 | break; | |
132 | ||
133 | case EV_LED: | |
134 | ||
135 | if (code > LED_MAX || !test_bit(code, dev->ledbit) || !!test_bit(code, dev->led) == value) | |
136 | return; | |
137 | ||
138 | change_bit(code, dev->led); | |
139 | if (dev->event) dev->event(dev, type, code, value); | |
140 | ||
141 | break; | |
142 | ||
143 | case EV_SND: | |
144 | ||
145 | if (code > SND_MAX || !test_bit(code, dev->sndbit)) | |
146 | return; | |
147 | ||
148 | if (dev->event) dev->event(dev, type, code, value); | |
149 | ||
150 | break; | |
151 | ||
152 | case EV_REP: | |
153 | ||
154 | if (code > REP_MAX || value < 0 || dev->rep[code] == value) return; | |
155 | ||
156 | dev->rep[code] = value; | |
157 | if (dev->event) dev->event(dev, type, code, value); | |
158 | ||
159 | break; | |
160 | ||
161 | case EV_FF: | |
162 | if (dev->event) dev->event(dev, type, code, value); | |
163 | break; | |
164 | } | |
165 | ||
166 | if (type != EV_SYN) | |
167 | dev->sync = 0; | |
168 | ||
169 | if (dev->grab) | |
170 | dev->grab->handler->event(dev->grab, type, code, value); | |
171 | else | |
172 | list_for_each_entry(handle, &dev->h_list, d_node) | |
173 | if (handle->open) | |
174 | handle->handler->event(handle, type, code, value); | |
175 | } | |
176 | ||
177 | static void input_repeat_key(unsigned long data) | |
178 | { | |
179 | struct input_dev *dev = (void *) data; | |
180 | ||
181 | if (!test_bit(dev->repeat_key, dev->key)) | |
182 | return; | |
183 | ||
184 | input_event(dev, EV_KEY, dev->repeat_key, 2); | |
185 | input_sync(dev); | |
186 | ||
187 | if (dev->rep[REP_PERIOD]) | |
188 | mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_PERIOD])); | |
189 | } | |
190 | ||
191 | int input_accept_process(struct input_handle *handle, struct file *file) | |
192 | { | |
193 | if (handle->dev->accept) | |
194 | return handle->dev->accept(handle->dev, file); | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
199 | int input_grab_device(struct input_handle *handle) | |
200 | { | |
201 | if (handle->dev->grab) | |
202 | return -EBUSY; | |
203 | ||
204 | handle->dev->grab = handle; | |
205 | return 0; | |
206 | } | |
207 | ||
208 | void input_release_device(struct input_handle *handle) | |
209 | { | |
210 | if (handle->dev->grab == handle) | |
211 | handle->dev->grab = NULL; | |
212 | } | |
213 | ||
214 | int input_open_device(struct input_handle *handle) | |
215 | { | |
0fbf87ca DT |
216 | struct input_dev *dev = handle->dev; |
217 | int err; | |
218 | ||
219 | err = down_interruptible(&dev->sem); | |
220 | if (err) | |
221 | return err; | |
222 | ||
1da177e4 | 223 | handle->open++; |
0fbf87ca DT |
224 | |
225 | if (!dev->users++ && dev->open) | |
226 | err = dev->open(dev); | |
227 | ||
228 | if (err) | |
229 | handle->open--; | |
230 | ||
231 | up(&dev->sem); | |
232 | ||
233 | return err; | |
1da177e4 LT |
234 | } |
235 | ||
236 | int input_flush_device(struct input_handle* handle, struct file* file) | |
237 | { | |
238 | if (handle->dev->flush) | |
239 | return handle->dev->flush(handle->dev, file); | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | void input_close_device(struct input_handle *handle) | |
245 | { | |
0fbf87ca DT |
246 | struct input_dev *dev = handle->dev; |
247 | ||
1da177e4 | 248 | input_release_device(handle); |
0fbf87ca DT |
249 | |
250 | down(&dev->sem); | |
251 | ||
252 | if (!--dev->users && dev->close) | |
253 | dev->close(dev); | |
1da177e4 | 254 | handle->open--; |
0fbf87ca DT |
255 | |
256 | up(&dev->sem); | |
1da177e4 LT |
257 | } |
258 | ||
259 | static void input_link_handle(struct input_handle *handle) | |
260 | { | |
261 | list_add_tail(&handle->d_node, &handle->dev->h_list); | |
262 | list_add_tail(&handle->h_node, &handle->handler->h_list); | |
263 | } | |
264 | ||
265 | #define MATCH_BIT(bit, max) \ | |
266 | for (i = 0; i < NBITS(max); i++) \ | |
267 | if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \ | |
268 | break; \ | |
269 | if (i != NBITS(max)) \ | |
270 | continue; | |
271 | ||
272 | static struct input_device_id *input_match_device(struct input_device_id *id, struct input_dev *dev) | |
273 | { | |
274 | int i; | |
275 | ||
276 | for (; id->flags || id->driver_info; id++) { | |
277 | ||
278 | if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) | |
279 | if (id->id.bustype != dev->id.bustype) | |
280 | continue; | |
281 | ||
282 | if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) | |
283 | if (id->id.vendor != dev->id.vendor) | |
284 | continue; | |
285 | ||
286 | if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) | |
287 | if (id->id.product != dev->id.product) | |
288 | continue; | |
289 | ||
290 | if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) | |
291 | if (id->id.version != dev->id.version) | |
292 | continue; | |
293 | ||
294 | MATCH_BIT(evbit, EV_MAX); | |
295 | MATCH_BIT(keybit, KEY_MAX); | |
296 | MATCH_BIT(relbit, REL_MAX); | |
297 | MATCH_BIT(absbit, ABS_MAX); | |
298 | MATCH_BIT(mscbit, MSC_MAX); | |
299 | MATCH_BIT(ledbit, LED_MAX); | |
300 | MATCH_BIT(sndbit, SND_MAX); | |
301 | MATCH_BIT(ffbit, FF_MAX); | |
302 | ||
303 | return id; | |
304 | } | |
305 | ||
306 | return NULL; | |
307 | } | |
308 | ||
f96b434d | 309 | |
1da177e4 LT |
310 | /* |
311 | * Input hotplugging interface - loading event handlers based on | |
312 | * device bitfields. | |
313 | */ | |
314 | ||
315 | #ifdef CONFIG_HOTPLUG | |
316 | ||
317 | /* | |
318 | * Input hotplugging invokes what /proc/sys/kernel/hotplug says | |
319 | * (normally /sbin/hotplug) when input devices get added or removed. | |
320 | * | |
321 | * This invokes a user mode policy agent, typically helping to load driver | |
322 | * or other modules, configure the device, and more. Drivers can provide | |
323 | * a MODULE_DEVICE_TABLE to help with module loading subtasks. | |
324 | * | |
325 | */ | |
326 | ||
327 | #define SPRINTF_BIT_A(bit, name, max) \ | |
328 | do { \ | |
329 | envp[i++] = scratch; \ | |
330 | scratch += sprintf(scratch, name); \ | |
331 | for (j = NBITS(max) - 1; j >= 0; j--) \ | |
332 | if (dev->bit[j]) break; \ | |
333 | for (; j >= 0; j--) \ | |
334 | scratch += sprintf(scratch, "%lx ", dev->bit[j]); \ | |
335 | scratch++; \ | |
336 | } while (0) | |
337 | ||
338 | #define SPRINTF_BIT_A2(bit, name, max, ev) \ | |
339 | do { \ | |
340 | if (test_bit(ev, dev->evbit)) \ | |
341 | SPRINTF_BIT_A(bit, name, max); \ | |
342 | } while (0) | |
343 | ||
344 | static void input_call_hotplug(char *verb, struct input_dev *dev) | |
345 | { | |
346 | char *argv[3], **envp, *buf, *scratch; | |
347 | int i = 0, j, value; | |
348 | ||
349 | if (!hotplug_path[0]) { | |
350 | printk(KERN_ERR "input.c: calling hotplug without a hotplug agent defined\n"); | |
351 | return; | |
352 | } | |
353 | if (in_interrupt()) { | |
354 | printk(KERN_ERR "input.c: calling hotplug from interrupt\n"); | |
355 | return; | |
356 | } | |
357 | if (!current->fs->root) { | |
358 | printk(KERN_WARNING "input.c: calling hotplug without valid filesystem\n"); | |
359 | return; | |
360 | } | |
361 | if (!(envp = (char **) kmalloc(20 * sizeof(char *), GFP_KERNEL))) { | |
362 | printk(KERN_ERR "input.c: not enough memory allocating hotplug environment\n"); | |
363 | return; | |
364 | } | |
365 | if (!(buf = kmalloc(1024, GFP_KERNEL))) { | |
366 | kfree (envp); | |
367 | printk(KERN_ERR "input.c: not enough memory allocating hotplug environment\n"); | |
368 | return; | |
369 | } | |
370 | ||
371 | argv[0] = hotplug_path; | |
372 | argv[1] = "input"; | |
373 | argv[2] = NULL; | |
374 | ||
375 | envp[i++] = "HOME=/"; | |
376 | envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; | |
377 | ||
378 | scratch = buf; | |
379 | ||
380 | envp[i++] = scratch; | |
381 | scratch += sprintf(scratch, "ACTION=%s", verb) + 1; | |
382 | ||
383 | envp[i++] = scratch; | |
384 | scratch += sprintf(scratch, "PRODUCT=%x/%x/%x/%x", | |
385 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version) + 1; | |
386 | ||
387 | if (dev->name) { | |
388 | envp[i++] = scratch; | |
389 | scratch += sprintf(scratch, "NAME=%s", dev->name) + 1; | |
390 | } | |
391 | ||
392 | if (dev->phys) { | |
393 | envp[i++] = scratch; | |
394 | scratch += sprintf(scratch, "PHYS=%s", dev->phys) + 1; | |
395 | } | |
396 | ||
397 | SPRINTF_BIT_A(evbit, "EV=", EV_MAX); | |
398 | SPRINTF_BIT_A2(keybit, "KEY=", KEY_MAX, EV_KEY); | |
399 | SPRINTF_BIT_A2(relbit, "REL=", REL_MAX, EV_REL); | |
400 | SPRINTF_BIT_A2(absbit, "ABS=", ABS_MAX, EV_ABS); | |
401 | SPRINTF_BIT_A2(mscbit, "MSC=", MSC_MAX, EV_MSC); | |
402 | SPRINTF_BIT_A2(ledbit, "LED=", LED_MAX, EV_LED); | |
403 | SPRINTF_BIT_A2(sndbit, "SND=", SND_MAX, EV_SND); | |
404 | SPRINTF_BIT_A2(ffbit, "FF=", FF_MAX, EV_FF); | |
405 | ||
406 | envp[i++] = NULL; | |
407 | ||
408 | #ifdef INPUT_DEBUG | |
409 | printk(KERN_DEBUG "input.c: calling %s %s [%s %s %s %s %s]\n", | |
410 | argv[0], argv[1], envp[0], envp[1], envp[2], envp[3], envp[4]); | |
411 | #endif | |
412 | ||
413 | value = call_usermodehelper(argv [0], argv, envp, 0); | |
414 | ||
415 | kfree(buf); | |
416 | kfree(envp); | |
417 | ||
418 | #ifdef INPUT_DEBUG | |
419 | if (value != 0) | |
420 | printk(KERN_DEBUG "input.c: hotplug returned %d\n", value); | |
421 | #endif | |
422 | } | |
423 | ||
424 | #endif | |
425 | ||
f96b434d DT |
426 | #ifdef CONFIG_PROC_FS |
427 | ||
428 | static struct proc_dir_entry *proc_bus_input_dir; | |
429 | static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait); | |
430 | static int input_devices_state; | |
431 | ||
432 | static inline void input_wakeup_procfs_readers(void) | |
433 | { | |
434 | input_devices_state++; | |
435 | wake_up(&input_devices_poll_wait); | |
436 | } | |
437 | ||
438 | static unsigned int input_devices_poll(struct file *file, poll_table *wait) | |
439 | { | |
440 | int state = input_devices_state; | |
441 | poll_wait(file, &input_devices_poll_wait, wait); | |
442 | if (state != input_devices_state) | |
443 | return POLLIN | POLLRDNORM; | |
444 | return 0; | |
445 | } | |
446 | ||
447 | #define SPRINTF_BIT_B(bit, name, max) \ | |
448 | do { \ | |
449 | len += sprintf(buf + len, "B: %s", name); \ | |
450 | for (i = NBITS(max) - 1; i >= 0; i--) \ | |
451 | if (dev->bit[i]) break; \ | |
452 | for (; i >= 0; i--) \ | |
453 | len += sprintf(buf + len, "%lx ", dev->bit[i]); \ | |
454 | len += sprintf(buf + len, "\n"); \ | |
455 | } while (0) | |
456 | ||
457 | #define SPRINTF_BIT_B2(bit, name, max, ev) \ | |
458 | do { \ | |
459 | if (test_bit(ev, dev->evbit)) \ | |
460 | SPRINTF_BIT_B(bit, name, max); \ | |
461 | } while (0) | |
462 | ||
463 | static int input_devices_read(char *buf, char **start, off_t pos, int count, int *eof, void *data) | |
464 | { | |
465 | struct input_dev *dev; | |
466 | struct input_handle *handle; | |
467 | ||
468 | off_t at = 0; | |
469 | int i, len, cnt = 0; | |
470 | ||
471 | list_for_each_entry(dev, &input_dev_list, node) { | |
472 | ||
473 | len = sprintf(buf, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n", | |
474 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); | |
475 | ||
476 | len += sprintf(buf + len, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); | |
477 | len += sprintf(buf + len, "P: Phys=%s\n", dev->phys ? dev->phys : ""); | |
478 | len += sprintf(buf + len, "H: Handlers="); | |
479 | ||
480 | list_for_each_entry(handle, &dev->h_list, d_node) | |
481 | len += sprintf(buf + len, "%s ", handle->name); | |
482 | ||
483 | len += sprintf(buf + len, "\n"); | |
484 | ||
485 | SPRINTF_BIT_B(evbit, "EV=", EV_MAX); | |
486 | SPRINTF_BIT_B2(keybit, "KEY=", KEY_MAX, EV_KEY); | |
487 | SPRINTF_BIT_B2(relbit, "REL=", REL_MAX, EV_REL); | |
488 | SPRINTF_BIT_B2(absbit, "ABS=", ABS_MAX, EV_ABS); | |
489 | SPRINTF_BIT_B2(mscbit, "MSC=", MSC_MAX, EV_MSC); | |
490 | SPRINTF_BIT_B2(ledbit, "LED=", LED_MAX, EV_LED); | |
491 | SPRINTF_BIT_B2(sndbit, "SND=", SND_MAX, EV_SND); | |
492 | SPRINTF_BIT_B2(ffbit, "FF=", FF_MAX, EV_FF); | |
493 | ||
494 | len += sprintf(buf + len, "\n"); | |
495 | ||
496 | at += len; | |
497 | ||
498 | if (at >= pos) { | |
499 | if (!*start) { | |
500 | *start = buf + (pos - (at - len)); | |
501 | cnt = at - pos; | |
502 | } else cnt += len; | |
503 | buf += len; | |
504 | if (cnt >= count) | |
505 | break; | |
506 | } | |
507 | } | |
508 | ||
509 | if (&dev->node == &input_dev_list) | |
510 | *eof = 1; | |
511 | ||
512 | return (count > cnt) ? cnt : count; | |
513 | } | |
514 | ||
515 | static int input_handlers_read(char *buf, char **start, off_t pos, int count, int *eof, void *data) | |
516 | { | |
517 | struct input_handler *handler; | |
518 | ||
519 | off_t at = 0; | |
520 | int len = 0, cnt = 0; | |
521 | int i = 0; | |
522 | ||
523 | list_for_each_entry(handler, &input_handler_list, node) { | |
524 | ||
525 | if (handler->fops) | |
526 | len = sprintf(buf, "N: Number=%d Name=%s Minor=%d\n", | |
527 | i++, handler->name, handler->minor); | |
528 | else | |
529 | len = sprintf(buf, "N: Number=%d Name=%s\n", | |
530 | i++, handler->name); | |
531 | ||
532 | at += len; | |
533 | ||
534 | if (at >= pos) { | |
535 | if (!*start) { | |
536 | *start = buf + (pos - (at - len)); | |
537 | cnt = at - pos; | |
538 | } else cnt += len; | |
539 | buf += len; | |
540 | if (cnt >= count) | |
541 | break; | |
542 | } | |
543 | } | |
544 | if (&handler->node == &input_handler_list) | |
545 | *eof = 1; | |
546 | ||
547 | return (count > cnt) ? cnt : count; | |
548 | } | |
549 | ||
550 | static struct file_operations input_fileops; | |
551 | ||
552 | static int __init input_proc_init(void) | |
553 | { | |
554 | struct proc_dir_entry *entry; | |
555 | ||
556 | proc_bus_input_dir = proc_mkdir("input", proc_bus); | |
557 | if (!proc_bus_input_dir) | |
558 | return -ENOMEM; | |
559 | ||
560 | proc_bus_input_dir->owner = THIS_MODULE; | |
561 | ||
562 | entry = create_proc_read_entry("devices", 0, proc_bus_input_dir, input_devices_read, NULL); | |
563 | if (!entry) | |
564 | goto fail1; | |
565 | ||
566 | entry->owner = THIS_MODULE; | |
567 | input_fileops = *entry->proc_fops; | |
568 | entry->proc_fops = &input_fileops; | |
569 | entry->proc_fops->poll = input_devices_poll; | |
570 | ||
571 | entry = create_proc_read_entry("handlers", 0, proc_bus_input_dir, input_handlers_read, NULL); | |
572 | if (!entry) | |
573 | goto fail2; | |
574 | ||
575 | entry->owner = THIS_MODULE; | |
576 | ||
577 | return 0; | |
578 | ||
579 | fail2: remove_proc_entry("devices", proc_bus_input_dir); | |
580 | fail1: remove_proc_entry("input", proc_bus); | |
581 | return -ENOMEM; | |
582 | } | |
583 | ||
584 | static void __exit input_proc_exit(void) | |
585 | { | |
586 | remove_proc_entry("devices", proc_bus_input_dir); | |
587 | remove_proc_entry("handlers", proc_bus_input_dir); | |
588 | remove_proc_entry("input", proc_bus); | |
589 | } | |
590 | ||
591 | #else /* !CONFIG_PROC_FS */ | |
592 | static inline void input_wakeup_procfs_readers(void) { } | |
593 | static inline int input_proc_init(void) { return 0; } | |
594 | static inline void input_proc_exit(void) { } | |
595 | #endif | |
596 | ||
1da177e4 LT |
597 | void input_register_device(struct input_dev *dev) |
598 | { | |
599 | struct input_handle *handle; | |
600 | struct input_handler *handler; | |
601 | struct input_device_id *id; | |
602 | ||
603 | set_bit(EV_SYN, dev->evbit); | |
604 | ||
0fbf87ca DT |
605 | init_MUTEX(&dev->sem); |
606 | ||
1da177e4 LT |
607 | /* |
608 | * If delay and period are pre-set by the driver, then autorepeating | |
609 | * is handled by the driver itself and we don't do it in input.c. | |
610 | */ | |
611 | ||
612 | init_timer(&dev->timer); | |
613 | if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) { | |
614 | dev->timer.data = (long) dev; | |
615 | dev->timer.function = input_repeat_key; | |
616 | dev->rep[REP_DELAY] = 250; | |
617 | dev->rep[REP_PERIOD] = 33; | |
618 | } | |
619 | ||
620 | INIT_LIST_HEAD(&dev->h_list); | |
621 | list_add_tail(&dev->node, &input_dev_list); | |
622 | ||
623 | list_for_each_entry(handler, &input_handler_list, node) | |
624 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) | |
625 | if ((id = input_match_device(handler->id_table, dev))) | |
626 | if ((handle = handler->connect(handler, dev, id))) | |
627 | input_link_handle(handle); | |
628 | ||
629 | #ifdef CONFIG_HOTPLUG | |
630 | input_call_hotplug("add", dev); | |
631 | #endif | |
632 | ||
f96b434d | 633 | input_wakeup_procfs_readers(); |
1da177e4 LT |
634 | } |
635 | ||
636 | void input_unregister_device(struct input_dev *dev) | |
637 | { | |
638 | struct list_head * node, * next; | |
639 | ||
640 | if (!dev) return; | |
641 | ||
642 | del_timer_sync(&dev->timer); | |
643 | ||
644 | list_for_each_safe(node, next, &dev->h_list) { | |
645 | struct input_handle * handle = to_handle(node); | |
646 | list_del_init(&handle->d_node); | |
647 | list_del_init(&handle->h_node); | |
648 | handle->handler->disconnect(handle); | |
649 | } | |
650 | ||
651 | #ifdef CONFIG_HOTPLUG | |
652 | input_call_hotplug("remove", dev); | |
653 | #endif | |
654 | ||
655 | list_del_init(&dev->node); | |
656 | ||
f96b434d | 657 | input_wakeup_procfs_readers(); |
1da177e4 LT |
658 | } |
659 | ||
660 | void input_register_handler(struct input_handler *handler) | |
661 | { | |
662 | struct input_dev *dev; | |
663 | struct input_handle *handle; | |
664 | struct input_device_id *id; | |
665 | ||
666 | if (!handler) return; | |
667 | ||
668 | INIT_LIST_HEAD(&handler->h_list); | |
669 | ||
670 | if (handler->fops != NULL) | |
671 | input_table[handler->minor >> 5] = handler; | |
672 | ||
673 | list_add_tail(&handler->node, &input_handler_list); | |
674 | ||
675 | list_for_each_entry(dev, &input_dev_list, node) | |
676 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) | |
677 | if ((id = input_match_device(handler->id_table, dev))) | |
678 | if ((handle = handler->connect(handler, dev, id))) | |
679 | input_link_handle(handle); | |
680 | ||
f96b434d | 681 | input_wakeup_procfs_readers(); |
1da177e4 LT |
682 | } |
683 | ||
684 | void input_unregister_handler(struct input_handler *handler) | |
685 | { | |
686 | struct list_head * node, * next; | |
687 | ||
688 | list_for_each_safe(node, next, &handler->h_list) { | |
689 | struct input_handle * handle = to_handle_h(node); | |
690 | list_del_init(&handle->h_node); | |
691 | list_del_init(&handle->d_node); | |
692 | handler->disconnect(handle); | |
693 | } | |
694 | ||
695 | list_del_init(&handler->node); | |
696 | ||
697 | if (handler->fops != NULL) | |
698 | input_table[handler->minor >> 5] = NULL; | |
699 | ||
f96b434d | 700 | input_wakeup_procfs_readers(); |
1da177e4 LT |
701 | } |
702 | ||
703 | static int input_open_file(struct inode *inode, struct file *file) | |
704 | { | |
705 | struct input_handler *handler = input_table[iminor(inode) >> 5]; | |
706 | struct file_operations *old_fops, *new_fops = NULL; | |
707 | int err; | |
708 | ||
709 | /* No load-on-demand here? */ | |
710 | if (!handler || !(new_fops = fops_get(handler->fops))) | |
711 | return -ENODEV; | |
712 | ||
713 | /* | |
714 | * That's _really_ odd. Usually NULL ->open means "nothing special", | |
715 | * not "no device". Oh, well... | |
716 | */ | |
717 | if (!new_fops->open) { | |
718 | fops_put(new_fops); | |
719 | return -ENODEV; | |
720 | } | |
721 | old_fops = file->f_op; | |
722 | file->f_op = new_fops; | |
723 | ||
724 | err = new_fops->open(inode, file); | |
725 | ||
726 | if (err) { | |
727 | fops_put(file->f_op); | |
728 | file->f_op = fops_get(old_fops); | |
729 | } | |
730 | fops_put(old_fops); | |
731 | return err; | |
732 | } | |
733 | ||
734 | static struct file_operations input_fops = { | |
735 | .owner = THIS_MODULE, | |
736 | .open = input_open_file, | |
737 | }; | |
738 | ||
f96b434d | 739 | struct class *input_class; |
1da177e4 | 740 | |
f96b434d | 741 | static int __init input_init(void) |
1da177e4 | 742 | { |
f96b434d | 743 | int err; |
1da177e4 | 744 | |
f96b434d DT |
745 | input_class = class_create(THIS_MODULE, "input"); |
746 | if (IS_ERR(input_class)) { | |
747 | printk(KERN_ERR "input: unable to register input class\n"); | |
748 | return PTR_ERR(input_class); | |
1da177e4 LT |
749 | } |
750 | ||
f96b434d DT |
751 | err = input_proc_init(); |
752 | if (err) | |
753 | goto fail1; | |
1da177e4 | 754 | |
f96b434d DT |
755 | err = register_chrdev(INPUT_MAJOR, "input", &input_fops); |
756 | if (err) { | |
757 | printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR); | |
758 | goto fail2; | |
1da177e4 | 759 | } |
e334016f | 760 | |
f96b434d DT |
761 | err = devfs_mk_dir("input"); |
762 | if (err) | |
763 | goto fail3; | |
1da177e4 | 764 | |
1da177e4 | 765 | return 0; |
1da177e4 | 766 | |
f96b434d DT |
767 | fail3: unregister_chrdev(INPUT_MAJOR, "input"); |
768 | fail2: input_proc_exit(); | |
769 | fail1: class_destroy(input_class); | |
770 | return err; | |
1da177e4 LT |
771 | } |
772 | ||
773 | static void __exit input_exit(void) | |
774 | { | |
f96b434d | 775 | input_proc_exit(); |
1da177e4 LT |
776 | devfs_remove("input"); |
777 | unregister_chrdev(INPUT_MAJOR, "input"); | |
1235686f | 778 | class_destroy(input_class); |
1da177e4 LT |
779 | } |
780 | ||
781 | subsys_initcall(input_init); | |
782 | module_exit(input_exit); |