]>
Commit | Line | Data |
---|---|---|
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 | ||
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); | |
311 | ||
312 | return id; | |
313 | } | |
314 | ||
315 | return NULL; | |
316 | } | |
317 | ||
f96b434d | 318 | |
1da177e4 LT |
319 | /* |
320 | * Input hotplugging interface - loading event handlers based on | |
321 | * device bitfields. | |
322 | */ | |
323 | ||
324 | #ifdef CONFIG_HOTPLUG | |
325 | ||
326 | /* | |
327 | * Input hotplugging invokes what /proc/sys/kernel/hotplug says | |
328 | * (normally /sbin/hotplug) when input devices get added or removed. | |
329 | * | |
330 | * This invokes a user mode policy agent, typically helping to load driver | |
331 | * or other modules, configure the device, and more. Drivers can provide | |
332 | * a MODULE_DEVICE_TABLE to help with module loading subtasks. | |
333 | * | |
334 | */ | |
335 | ||
336 | #define SPRINTF_BIT_A(bit, name, max) \ | |
337 | do { \ | |
338 | envp[i++] = scratch; \ | |
339 | scratch += sprintf(scratch, name); \ | |
340 | for (j = NBITS(max) - 1; j >= 0; j--) \ | |
341 | if (dev->bit[j]) break; \ | |
342 | for (; j >= 0; j--) \ | |
343 | scratch += sprintf(scratch, "%lx ", dev->bit[j]); \ | |
344 | scratch++; \ | |
345 | } while (0) | |
346 | ||
347 | #define SPRINTF_BIT_A2(bit, name, max, ev) \ | |
348 | do { \ | |
349 | if (test_bit(ev, dev->evbit)) \ | |
350 | SPRINTF_BIT_A(bit, name, max); \ | |
351 | } while (0) | |
352 | ||
353 | static void input_call_hotplug(char *verb, struct input_dev *dev) | |
354 | { | |
355 | char *argv[3], **envp, *buf, *scratch; | |
356 | int i = 0, j, value; | |
357 | ||
358 | if (!hotplug_path[0]) { | |
359 | printk(KERN_ERR "input.c: calling hotplug without a hotplug agent defined\n"); | |
360 | return; | |
361 | } | |
362 | if (in_interrupt()) { | |
363 | printk(KERN_ERR "input.c: calling hotplug from interrupt\n"); | |
364 | return; | |
365 | } | |
366 | if (!current->fs->root) { | |
367 | printk(KERN_WARNING "input.c: calling hotplug without valid filesystem\n"); | |
368 | return; | |
369 | } | |
370 | if (!(envp = (char **) kmalloc(20 * sizeof(char *), GFP_KERNEL))) { | |
371 | printk(KERN_ERR "input.c: not enough memory allocating hotplug environment\n"); | |
372 | return; | |
373 | } | |
374 | if (!(buf = kmalloc(1024, GFP_KERNEL))) { | |
375 | kfree (envp); | |
376 | printk(KERN_ERR "input.c: not enough memory allocating hotplug environment\n"); | |
377 | return; | |
378 | } | |
379 | ||
380 | argv[0] = hotplug_path; | |
381 | argv[1] = "input"; | |
382 | argv[2] = NULL; | |
383 | ||
384 | envp[i++] = "HOME=/"; | |
385 | envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin"; | |
386 | ||
387 | scratch = buf; | |
388 | ||
389 | envp[i++] = scratch; | |
390 | scratch += sprintf(scratch, "ACTION=%s", verb) + 1; | |
391 | ||
392 | envp[i++] = scratch; | |
393 | scratch += sprintf(scratch, "PRODUCT=%x/%x/%x/%x", | |
394 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version) + 1; | |
395 | ||
396 | if (dev->name) { | |
397 | envp[i++] = scratch; | |
398 | scratch += sprintf(scratch, "NAME=%s", dev->name) + 1; | |
399 | } | |
400 | ||
401 | if (dev->phys) { | |
402 | envp[i++] = scratch; | |
403 | scratch += sprintf(scratch, "PHYS=%s", dev->phys) + 1; | |
404 | } | |
405 | ||
406 | SPRINTF_BIT_A(evbit, "EV=", EV_MAX); | |
407 | SPRINTF_BIT_A2(keybit, "KEY=", KEY_MAX, EV_KEY); | |
408 | SPRINTF_BIT_A2(relbit, "REL=", REL_MAX, EV_REL); | |
409 | SPRINTF_BIT_A2(absbit, "ABS=", ABS_MAX, EV_ABS); | |
410 | SPRINTF_BIT_A2(mscbit, "MSC=", MSC_MAX, EV_MSC); | |
411 | SPRINTF_BIT_A2(ledbit, "LED=", LED_MAX, EV_LED); | |
412 | SPRINTF_BIT_A2(sndbit, "SND=", SND_MAX, EV_SND); | |
413 | SPRINTF_BIT_A2(ffbit, "FF=", FF_MAX, EV_FF); | |
31581066 | 414 | SPRINTF_BIT_A2(swbit, "SW=", SW_MAX, EV_SW); |
1da177e4 LT |
415 | |
416 | envp[i++] = NULL; | |
417 | ||
418 | #ifdef INPUT_DEBUG | |
419 | printk(KERN_DEBUG "input.c: calling %s %s [%s %s %s %s %s]\n", | |
420 | argv[0], argv[1], envp[0], envp[1], envp[2], envp[3], envp[4]); | |
421 | #endif | |
422 | ||
423 | value = call_usermodehelper(argv [0], argv, envp, 0); | |
424 | ||
425 | kfree(buf); | |
426 | kfree(envp); | |
427 | ||
428 | #ifdef INPUT_DEBUG | |
429 | if (value != 0) | |
430 | printk(KERN_DEBUG "input.c: hotplug returned %d\n", value); | |
431 | #endif | |
432 | } | |
433 | ||
434 | #endif | |
435 | ||
f96b434d DT |
436 | #ifdef CONFIG_PROC_FS |
437 | ||
438 | static struct proc_dir_entry *proc_bus_input_dir; | |
439 | static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait); | |
440 | static int input_devices_state; | |
441 | ||
442 | static inline void input_wakeup_procfs_readers(void) | |
443 | { | |
444 | input_devices_state++; | |
445 | wake_up(&input_devices_poll_wait); | |
446 | } | |
447 | ||
448 | static unsigned int input_devices_poll(struct file *file, poll_table *wait) | |
449 | { | |
450 | int state = input_devices_state; | |
451 | poll_wait(file, &input_devices_poll_wait, wait); | |
452 | if (state != input_devices_state) | |
453 | return POLLIN | POLLRDNORM; | |
454 | return 0; | |
455 | } | |
456 | ||
457 | #define SPRINTF_BIT_B(bit, name, max) \ | |
458 | do { \ | |
459 | len += sprintf(buf + len, "B: %s", name); \ | |
460 | for (i = NBITS(max) - 1; i >= 0; i--) \ | |
461 | if (dev->bit[i]) break; \ | |
462 | for (; i >= 0; i--) \ | |
463 | len += sprintf(buf + len, "%lx ", dev->bit[i]); \ | |
464 | len += sprintf(buf + len, "\n"); \ | |
465 | } while (0) | |
466 | ||
467 | #define SPRINTF_BIT_B2(bit, name, max, ev) \ | |
468 | do { \ | |
469 | if (test_bit(ev, dev->evbit)) \ | |
470 | SPRINTF_BIT_B(bit, name, max); \ | |
471 | } while (0) | |
472 | ||
473 | static int input_devices_read(char *buf, char **start, off_t pos, int count, int *eof, void *data) | |
474 | { | |
475 | struct input_dev *dev; | |
476 | struct input_handle *handle; | |
477 | ||
478 | off_t at = 0; | |
479 | int i, len, cnt = 0; | |
480 | ||
481 | list_for_each_entry(dev, &input_dev_list, node) { | |
482 | ||
483 | len = sprintf(buf, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n", | |
484 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); | |
485 | ||
486 | len += sprintf(buf + len, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); | |
487 | len += sprintf(buf + len, "P: Phys=%s\n", dev->phys ? dev->phys : ""); | |
488 | len += sprintf(buf + len, "H: Handlers="); | |
489 | ||
490 | list_for_each_entry(handle, &dev->h_list, d_node) | |
491 | len += sprintf(buf + len, "%s ", handle->name); | |
492 | ||
493 | len += sprintf(buf + len, "\n"); | |
494 | ||
495 | SPRINTF_BIT_B(evbit, "EV=", EV_MAX); | |
496 | SPRINTF_BIT_B2(keybit, "KEY=", KEY_MAX, EV_KEY); | |
497 | SPRINTF_BIT_B2(relbit, "REL=", REL_MAX, EV_REL); | |
498 | SPRINTF_BIT_B2(absbit, "ABS=", ABS_MAX, EV_ABS); | |
499 | SPRINTF_BIT_B2(mscbit, "MSC=", MSC_MAX, EV_MSC); | |
500 | SPRINTF_BIT_B2(ledbit, "LED=", LED_MAX, EV_LED); | |
501 | SPRINTF_BIT_B2(sndbit, "SND=", SND_MAX, EV_SND); | |
502 | SPRINTF_BIT_B2(ffbit, "FF=", FF_MAX, EV_FF); | |
31581066 | 503 | SPRINTF_BIT_B2(swbit, "SW=", SW_MAX, EV_SW); |
f96b434d DT |
504 | |
505 | len += sprintf(buf + len, "\n"); | |
506 | ||
507 | at += len; | |
508 | ||
509 | if (at >= pos) { | |
510 | if (!*start) { | |
511 | *start = buf + (pos - (at - len)); | |
512 | cnt = at - pos; | |
513 | } else cnt += len; | |
514 | buf += len; | |
515 | if (cnt >= count) | |
516 | break; | |
517 | } | |
518 | } | |
519 | ||
520 | if (&dev->node == &input_dev_list) | |
521 | *eof = 1; | |
522 | ||
523 | return (count > cnt) ? cnt : count; | |
524 | } | |
525 | ||
526 | static int input_handlers_read(char *buf, char **start, off_t pos, int count, int *eof, void *data) | |
527 | { | |
528 | struct input_handler *handler; | |
529 | ||
530 | off_t at = 0; | |
531 | int len = 0, cnt = 0; | |
532 | int i = 0; | |
533 | ||
534 | list_for_each_entry(handler, &input_handler_list, node) { | |
535 | ||
536 | if (handler->fops) | |
537 | len = sprintf(buf, "N: Number=%d Name=%s Minor=%d\n", | |
538 | i++, handler->name, handler->minor); | |
539 | else | |
540 | len = sprintf(buf, "N: Number=%d Name=%s\n", | |
541 | i++, handler->name); | |
542 | ||
543 | at += len; | |
544 | ||
545 | if (at >= pos) { | |
546 | if (!*start) { | |
547 | *start = buf + (pos - (at - len)); | |
548 | cnt = at - pos; | |
549 | } else cnt += len; | |
550 | buf += len; | |
551 | if (cnt >= count) | |
552 | break; | |
553 | } | |
554 | } | |
555 | if (&handler->node == &input_handler_list) | |
556 | *eof = 1; | |
557 | ||
558 | return (count > cnt) ? cnt : count; | |
559 | } | |
560 | ||
561 | static struct file_operations input_fileops; | |
562 | ||
563 | static int __init input_proc_init(void) | |
564 | { | |
565 | struct proc_dir_entry *entry; | |
566 | ||
567 | proc_bus_input_dir = proc_mkdir("input", proc_bus); | |
568 | if (!proc_bus_input_dir) | |
569 | return -ENOMEM; | |
570 | ||
571 | proc_bus_input_dir->owner = THIS_MODULE; | |
572 | ||
573 | entry = create_proc_read_entry("devices", 0, proc_bus_input_dir, input_devices_read, NULL); | |
574 | if (!entry) | |
575 | goto fail1; | |
576 | ||
577 | entry->owner = THIS_MODULE; | |
578 | input_fileops = *entry->proc_fops; | |
579 | entry->proc_fops = &input_fileops; | |
580 | entry->proc_fops->poll = input_devices_poll; | |
581 | ||
582 | entry = create_proc_read_entry("handlers", 0, proc_bus_input_dir, input_handlers_read, NULL); | |
583 | if (!entry) | |
584 | goto fail2; | |
585 | ||
586 | entry->owner = THIS_MODULE; | |
587 | ||
588 | return 0; | |
589 | ||
590 | fail2: remove_proc_entry("devices", proc_bus_input_dir); | |
591 | fail1: remove_proc_entry("input", proc_bus); | |
592 | return -ENOMEM; | |
593 | } | |
594 | ||
beffbdc2 | 595 | static void input_proc_exit(void) |
f96b434d DT |
596 | { |
597 | remove_proc_entry("devices", proc_bus_input_dir); | |
598 | remove_proc_entry("handlers", proc_bus_input_dir); | |
599 | remove_proc_entry("input", proc_bus); | |
600 | } | |
601 | ||
602 | #else /* !CONFIG_PROC_FS */ | |
603 | static inline void input_wakeup_procfs_readers(void) { } | |
604 | static inline int input_proc_init(void) { return 0; } | |
605 | static inline void input_proc_exit(void) { } | |
606 | #endif | |
607 | ||
1da177e4 LT |
608 | void input_register_device(struct input_dev *dev) |
609 | { | |
610 | struct input_handle *handle; | |
611 | struct input_handler *handler; | |
612 | struct input_device_id *id; | |
613 | ||
614 | set_bit(EV_SYN, dev->evbit); | |
615 | ||
0fbf87ca DT |
616 | init_MUTEX(&dev->sem); |
617 | ||
1da177e4 LT |
618 | /* |
619 | * If delay and period are pre-set by the driver, then autorepeating | |
620 | * is handled by the driver itself and we don't do it in input.c. | |
621 | */ | |
622 | ||
623 | init_timer(&dev->timer); | |
624 | if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) { | |
625 | dev->timer.data = (long) dev; | |
626 | dev->timer.function = input_repeat_key; | |
627 | dev->rep[REP_DELAY] = 250; | |
628 | dev->rep[REP_PERIOD] = 33; | |
629 | } | |
630 | ||
631 | INIT_LIST_HEAD(&dev->h_list); | |
632 | list_add_tail(&dev->node, &input_dev_list); | |
633 | ||
634 | list_for_each_entry(handler, &input_handler_list, node) | |
635 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) | |
636 | if ((id = input_match_device(handler->id_table, dev))) | |
637 | if ((handle = handler->connect(handler, dev, id))) | |
638 | input_link_handle(handle); | |
639 | ||
640 | #ifdef CONFIG_HOTPLUG | |
641 | input_call_hotplug("add", dev); | |
642 | #endif | |
643 | ||
f96b434d | 644 | input_wakeup_procfs_readers(); |
1da177e4 LT |
645 | } |
646 | ||
647 | void input_unregister_device(struct input_dev *dev) | |
648 | { | |
649 | struct list_head * node, * next; | |
650 | ||
651 | if (!dev) return; | |
652 | ||
653 | del_timer_sync(&dev->timer); | |
654 | ||
655 | list_for_each_safe(node, next, &dev->h_list) { | |
656 | struct input_handle * handle = to_handle(node); | |
657 | list_del_init(&handle->d_node); | |
658 | list_del_init(&handle->h_node); | |
659 | handle->handler->disconnect(handle); | |
660 | } | |
661 | ||
662 | #ifdef CONFIG_HOTPLUG | |
663 | input_call_hotplug("remove", dev); | |
664 | #endif | |
665 | ||
666 | list_del_init(&dev->node); | |
667 | ||
f96b434d | 668 | input_wakeup_procfs_readers(); |
1da177e4 LT |
669 | } |
670 | ||
671 | void input_register_handler(struct input_handler *handler) | |
672 | { | |
673 | struct input_dev *dev; | |
674 | struct input_handle *handle; | |
675 | struct input_device_id *id; | |
676 | ||
677 | if (!handler) return; | |
678 | ||
679 | INIT_LIST_HEAD(&handler->h_list); | |
680 | ||
681 | if (handler->fops != NULL) | |
682 | input_table[handler->minor >> 5] = handler; | |
683 | ||
684 | list_add_tail(&handler->node, &input_handler_list); | |
685 | ||
686 | list_for_each_entry(dev, &input_dev_list, node) | |
687 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) | |
688 | if ((id = input_match_device(handler->id_table, dev))) | |
689 | if ((handle = handler->connect(handler, dev, id))) | |
690 | input_link_handle(handle); | |
691 | ||
f96b434d | 692 | input_wakeup_procfs_readers(); |
1da177e4 LT |
693 | } |
694 | ||
695 | void input_unregister_handler(struct input_handler *handler) | |
696 | { | |
697 | struct list_head * node, * next; | |
698 | ||
699 | list_for_each_safe(node, next, &handler->h_list) { | |
700 | struct input_handle * handle = to_handle_h(node); | |
701 | list_del_init(&handle->h_node); | |
702 | list_del_init(&handle->d_node); | |
703 | handler->disconnect(handle); | |
704 | } | |
705 | ||
706 | list_del_init(&handler->node); | |
707 | ||
708 | if (handler->fops != NULL) | |
709 | input_table[handler->minor >> 5] = NULL; | |
710 | ||
f96b434d | 711 | input_wakeup_procfs_readers(); |
1da177e4 LT |
712 | } |
713 | ||
714 | static int input_open_file(struct inode *inode, struct file *file) | |
715 | { | |
716 | struct input_handler *handler = input_table[iminor(inode) >> 5]; | |
717 | struct file_operations *old_fops, *new_fops = NULL; | |
718 | int err; | |
719 | ||
720 | /* No load-on-demand here? */ | |
721 | if (!handler || !(new_fops = fops_get(handler->fops))) | |
722 | return -ENODEV; | |
723 | ||
724 | /* | |
725 | * That's _really_ odd. Usually NULL ->open means "nothing special", | |
726 | * not "no device". Oh, well... | |
727 | */ | |
728 | if (!new_fops->open) { | |
729 | fops_put(new_fops); | |
730 | return -ENODEV; | |
731 | } | |
732 | old_fops = file->f_op; | |
733 | file->f_op = new_fops; | |
734 | ||
735 | err = new_fops->open(inode, file); | |
736 | ||
737 | if (err) { | |
738 | fops_put(file->f_op); | |
739 | file->f_op = fops_get(old_fops); | |
740 | } | |
741 | fops_put(old_fops); | |
742 | return err; | |
743 | } | |
744 | ||
745 | static struct file_operations input_fops = { | |
746 | .owner = THIS_MODULE, | |
747 | .open = input_open_file, | |
748 | }; | |
749 | ||
f96b434d | 750 | struct class *input_class; |
1da177e4 | 751 | |
f96b434d | 752 | static int __init input_init(void) |
1da177e4 | 753 | { |
f96b434d | 754 | int err; |
1da177e4 | 755 | |
f96b434d DT |
756 | input_class = class_create(THIS_MODULE, "input"); |
757 | if (IS_ERR(input_class)) { | |
758 | printk(KERN_ERR "input: unable to register input class\n"); | |
759 | return PTR_ERR(input_class); | |
1da177e4 LT |
760 | } |
761 | ||
f96b434d DT |
762 | err = input_proc_init(); |
763 | if (err) | |
764 | goto fail1; | |
1da177e4 | 765 | |
f96b434d DT |
766 | err = register_chrdev(INPUT_MAJOR, "input", &input_fops); |
767 | if (err) { | |
768 | printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR); | |
769 | goto fail2; | |
1da177e4 | 770 | } |
e334016f | 771 | |
f96b434d DT |
772 | err = devfs_mk_dir("input"); |
773 | if (err) | |
774 | goto fail3; | |
1da177e4 | 775 | |
1da177e4 | 776 | return 0; |
1da177e4 | 777 | |
f96b434d DT |
778 | fail3: unregister_chrdev(INPUT_MAJOR, "input"); |
779 | fail2: input_proc_exit(); | |
780 | fail1: class_destroy(input_class); | |
781 | return err; | |
1da177e4 LT |
782 | } |
783 | ||
784 | static void __exit input_exit(void) | |
785 | { | |
f96b434d | 786 | input_proc_exit(); |
1da177e4 LT |
787 | devfs_remove("input"); |
788 | unregister_chrdev(INPUT_MAJOR, "input"); | |
1235686f | 789 | class_destroy(input_class); |
1da177e4 LT |
790 | } |
791 | ||
792 | subsys_initcall(input_init); | |
793 | module_exit(input_exit); |