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