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 | ||
1da177e4 LT |
200 | int input_grab_device(struct input_handle *handle) |
201 | { | |
202 | if (handle->dev->grab) | |
203 | return -EBUSY; | |
204 | ||
205 | handle->dev->grab = handle; | |
206 | return 0; | |
207 | } | |
ca56fe07 | 208 | EXPORT_SYMBOL(input_grab_device); |
1da177e4 LT |
209 | |
210 | void input_release_device(struct input_handle *handle) | |
211 | { | |
c7e8dc6e | 212 | if (handle->dev->grab == handle) { |
1da177e4 | 213 | handle->dev->grab = NULL; |
c7e8dc6e DT |
214 | |
215 | list_for_each_entry(handle, &handle->dev->h_list, d_node) | |
216 | if (handle->handler->start) | |
217 | handle->handler->start(handle); | |
218 | } | |
1da177e4 | 219 | } |
ca56fe07 | 220 | EXPORT_SYMBOL(input_release_device); |
1da177e4 LT |
221 | |
222 | int input_open_device(struct input_handle *handle) | |
223 | { | |
0fbf87ca DT |
224 | struct input_dev *dev = handle->dev; |
225 | int err; | |
226 | ||
e676c232 | 227 | err = mutex_lock_interruptible(&dev->mutex); |
0fbf87ca DT |
228 | if (err) |
229 | return err; | |
230 | ||
1da177e4 | 231 | handle->open++; |
0fbf87ca DT |
232 | |
233 | if (!dev->users++ && dev->open) | |
234 | err = dev->open(dev); | |
235 | ||
236 | if (err) | |
237 | handle->open--; | |
238 | ||
e676c232 | 239 | mutex_unlock(&dev->mutex); |
0fbf87ca DT |
240 | |
241 | return err; | |
1da177e4 | 242 | } |
ca56fe07 | 243 | EXPORT_SYMBOL(input_open_device); |
1da177e4 LT |
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 | } | |
ca56fe07 | 252 | EXPORT_SYMBOL(input_flush_device); |
1da177e4 LT |
253 | |
254 | void input_close_device(struct input_handle *handle) | |
255 | { | |
0fbf87ca DT |
256 | struct input_dev *dev = handle->dev; |
257 | ||
1da177e4 | 258 | input_release_device(handle); |
0fbf87ca | 259 | |
e676c232 | 260 | mutex_lock(&dev->mutex); |
0fbf87ca DT |
261 | |
262 | if (!--dev->users && dev->close) | |
263 | dev->close(dev); | |
1da177e4 | 264 | handle->open--; |
0fbf87ca | 265 | |
e676c232 | 266 | mutex_unlock(&dev->mutex); |
1da177e4 | 267 | } |
ca56fe07 | 268 | EXPORT_SYMBOL(input_close_device); |
1da177e4 LT |
269 | |
270 | static void input_link_handle(struct input_handle *handle) | |
271 | { | |
272 | list_add_tail(&handle->d_node, &handle->dev->h_list); | |
273 | list_add_tail(&handle->h_node, &handle->handler->h_list); | |
274 | } | |
275 | ||
276 | #define MATCH_BIT(bit, max) \ | |
277 | for (i = 0; i < NBITS(max); i++) \ | |
278 | if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \ | |
279 | break; \ | |
280 | if (i != NBITS(max)) \ | |
281 | continue; | |
282 | ||
283 | static struct input_device_id *input_match_device(struct input_device_id *id, struct input_dev *dev) | |
284 | { | |
285 | int i; | |
286 | ||
287 | for (; id->flags || id->driver_info; id++) { | |
288 | ||
289 | if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) | |
ddc5d341 | 290 | if (id->bustype != dev->id.bustype) |
1da177e4 LT |
291 | continue; |
292 | ||
293 | if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) | |
ddc5d341 | 294 | if (id->vendor != dev->id.vendor) |
1da177e4 LT |
295 | continue; |
296 | ||
297 | if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) | |
ddc5d341 | 298 | if (id->product != dev->id.product) |
1da177e4 LT |
299 | continue; |
300 | ||
301 | if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) | |
ddc5d341 | 302 | if (id->version != dev->id.version) |
1da177e4 LT |
303 | continue; |
304 | ||
305 | MATCH_BIT(evbit, EV_MAX); | |
306 | MATCH_BIT(keybit, KEY_MAX); | |
307 | MATCH_BIT(relbit, REL_MAX); | |
308 | MATCH_BIT(absbit, ABS_MAX); | |
309 | MATCH_BIT(mscbit, MSC_MAX); | |
310 | MATCH_BIT(ledbit, LED_MAX); | |
311 | MATCH_BIT(sndbit, SND_MAX); | |
312 | MATCH_BIT(ffbit, FF_MAX); | |
ff13f98b | 313 | MATCH_BIT(swbit, SW_MAX); |
1da177e4 LT |
314 | |
315 | return id; | |
316 | } | |
317 | ||
318 | return NULL; | |
319 | } | |
320 | ||
f96b434d DT |
321 | #ifdef CONFIG_PROC_FS |
322 | ||
323 | static struct proc_dir_entry *proc_bus_input_dir; | |
324 | static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait); | |
325 | static int input_devices_state; | |
326 | ||
327 | static inline void input_wakeup_procfs_readers(void) | |
328 | { | |
329 | input_devices_state++; | |
330 | wake_up(&input_devices_poll_wait); | |
331 | } | |
332 | ||
969b21cd | 333 | static unsigned int input_proc_devices_poll(struct file *file, poll_table *wait) |
f96b434d DT |
334 | { |
335 | int state = input_devices_state; | |
1e0afb28 | 336 | |
f96b434d DT |
337 | poll_wait(file, &input_devices_poll_wait, wait); |
338 | if (state != input_devices_state) | |
339 | return POLLIN | POLLRDNORM; | |
1e0afb28 | 340 | |
f96b434d DT |
341 | return 0; |
342 | } | |
343 | ||
969b21cd DT |
344 | static struct list_head *list_get_nth_element(struct list_head *list, loff_t *pos) |
345 | { | |
346 | struct list_head *node; | |
347 | loff_t i = 0; | |
f96b434d | 348 | |
969b21cd DT |
349 | list_for_each(node, list) |
350 | if (i++ == *pos) | |
351 | return node; | |
352 | ||
353 | return NULL; | |
354 | } | |
f96b434d | 355 | |
969b21cd | 356 | static struct list_head *list_get_next_element(struct list_head *list, struct list_head *element, loff_t *pos) |
f96b434d | 357 | { |
969b21cd DT |
358 | if (element->next == list) |
359 | return NULL; | |
f96b434d | 360 | |
969b21cd DT |
361 | ++(*pos); |
362 | return element->next; | |
363 | } | |
f96b434d | 364 | |
969b21cd DT |
365 | static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos) |
366 | { | |
367 | /* acquire lock here ... Yes, we do need locking, I knowi, I know... */ | |
f96b434d | 368 | |
969b21cd DT |
369 | return list_get_nth_element(&input_dev_list, pos); |
370 | } | |
051b2fea | 371 | |
969b21cd DT |
372 | static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
373 | { | |
374 | return list_get_next_element(&input_dev_list, v, pos); | |
375 | } | |
f96b434d | 376 | |
969b21cd DT |
377 | static void input_devices_seq_stop(struct seq_file *seq, void *v) |
378 | { | |
379 | /* release lock here */ | |
380 | } | |
f96b434d | 381 | |
969b21cd DT |
382 | static void input_seq_print_bitmap(struct seq_file *seq, const char *name, |
383 | unsigned long *bitmap, int max) | |
384 | { | |
385 | int i; | |
051b2fea | 386 | |
969b21cd DT |
387 | for (i = NBITS(max) - 1; i > 0; i--) |
388 | if (bitmap[i]) | |
389 | break; | |
f96b434d | 390 | |
969b21cd DT |
391 | seq_printf(seq, "B: %s=", name); |
392 | for (; i >= 0; i--) | |
393 | seq_printf(seq, "%lx%s", bitmap[i], i > 0 ? " " : ""); | |
394 | seq_putc(seq, '\n'); | |
395 | } | |
f96b434d | 396 | |
969b21cd DT |
397 | static int input_devices_seq_show(struct seq_file *seq, void *v) |
398 | { | |
399 | struct input_dev *dev = container_of(v, struct input_dev, node); | |
400 | const char *path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL); | |
401 | struct input_handle *handle; | |
402 | ||
403 | seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n", | |
404 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); | |
405 | ||
406 | seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); | |
407 | seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : ""); | |
408 | seq_printf(seq, "S: Sysfs=%s\n", path ? path : ""); | |
409 | seq_printf(seq, "H: Handlers="); | |
410 | ||
411 | list_for_each_entry(handle, &dev->h_list, d_node) | |
412 | seq_printf(seq, "%s ", handle->name); | |
413 | seq_putc(seq, '\n'); | |
414 | ||
415 | input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX); | |
416 | if (test_bit(EV_KEY, dev->evbit)) | |
417 | input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX); | |
418 | if (test_bit(EV_REL, dev->evbit)) | |
419 | input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX); | |
420 | if (test_bit(EV_ABS, dev->evbit)) | |
421 | input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX); | |
422 | if (test_bit(EV_MSC, dev->evbit)) | |
423 | input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX); | |
424 | if (test_bit(EV_LED, dev->evbit)) | |
425 | input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX); | |
426 | if (test_bit(EV_SND, dev->evbit)) | |
427 | input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX); | |
428 | if (test_bit(EV_FF, dev->evbit)) | |
429 | input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX); | |
430 | if (test_bit(EV_SW, dev->evbit)) | |
431 | input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX); | |
432 | ||
433 | seq_putc(seq, '\n'); | |
434 | ||
435 | kfree(path); | |
436 | return 0; | |
f96b434d DT |
437 | } |
438 | ||
969b21cd DT |
439 | static struct seq_operations input_devices_seq_ops = { |
440 | .start = input_devices_seq_start, | |
441 | .next = input_devices_seq_next, | |
442 | .stop = input_devices_seq_stop, | |
443 | .show = input_devices_seq_show, | |
444 | }; | |
445 | ||
446 | static int input_proc_devices_open(struct inode *inode, struct file *file) | |
f96b434d | 447 | { |
969b21cd DT |
448 | return seq_open(file, &input_devices_seq_ops); |
449 | } | |
450 | ||
451 | static struct file_operations input_devices_fileops = { | |
452 | .owner = THIS_MODULE, | |
453 | .open = input_proc_devices_open, | |
454 | .poll = input_proc_devices_poll, | |
455 | .read = seq_read, | |
456 | .llseek = seq_lseek, | |
457 | .release = seq_release, | |
458 | }; | |
459 | ||
460 | static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos) | |
461 | { | |
462 | /* acquire lock here ... Yes, we do need locking, I knowi, I know... */ | |
463 | seq->private = (void *)(unsigned long)*pos; | |
464 | return list_get_nth_element(&input_handler_list, pos); | |
465 | } | |
f96b434d | 466 | |
969b21cd DT |
467 | static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
468 | { | |
469 | seq->private = (void *)(unsigned long)(*pos + 1); | |
470 | return list_get_next_element(&input_handler_list, v, pos); | |
f96b434d DT |
471 | } |
472 | ||
969b21cd DT |
473 | static void input_handlers_seq_stop(struct seq_file *seq, void *v) |
474 | { | |
475 | /* release lock here */ | |
476 | } | |
477 | ||
478 | static int input_handlers_seq_show(struct seq_file *seq, void *v) | |
479 | { | |
480 | struct input_handler *handler = container_of(v, struct input_handler, node); | |
481 | ||
482 | seq_printf(seq, "N: Number=%ld Name=%s", | |
483 | (unsigned long)seq->private, handler->name); | |
484 | if (handler->fops) | |
485 | seq_printf(seq, " Minor=%d", handler->minor); | |
486 | seq_putc(seq, '\n'); | |
487 | ||
488 | return 0; | |
489 | } | |
490 | static struct seq_operations input_handlers_seq_ops = { | |
491 | .start = input_handlers_seq_start, | |
492 | .next = input_handlers_seq_next, | |
493 | .stop = input_handlers_seq_stop, | |
494 | .show = input_handlers_seq_show, | |
495 | }; | |
496 | ||
497 | static int input_proc_handlers_open(struct inode *inode, struct file *file) | |
498 | { | |
499 | return seq_open(file, &input_handlers_seq_ops); | |
500 | } | |
501 | ||
502 | static struct file_operations input_handlers_fileops = { | |
503 | .owner = THIS_MODULE, | |
504 | .open = input_proc_handlers_open, | |
505 | .read = seq_read, | |
506 | .llseek = seq_lseek, | |
507 | .release = seq_release, | |
508 | }; | |
f96b434d DT |
509 | |
510 | static int __init input_proc_init(void) | |
511 | { | |
512 | struct proc_dir_entry *entry; | |
513 | ||
514 | proc_bus_input_dir = proc_mkdir("input", proc_bus); | |
515 | if (!proc_bus_input_dir) | |
516 | return -ENOMEM; | |
517 | ||
518 | proc_bus_input_dir->owner = THIS_MODULE; | |
519 | ||
969b21cd | 520 | entry = create_proc_entry("devices", 0, proc_bus_input_dir); |
f96b434d DT |
521 | if (!entry) |
522 | goto fail1; | |
523 | ||
524 | entry->owner = THIS_MODULE; | |
969b21cd | 525 | entry->proc_fops = &input_devices_fileops; |
f96b434d | 526 | |
969b21cd | 527 | entry = create_proc_entry("handlers", 0, proc_bus_input_dir); |
f96b434d DT |
528 | if (!entry) |
529 | goto fail2; | |
530 | ||
531 | entry->owner = THIS_MODULE; | |
969b21cd | 532 | entry->proc_fops = &input_handlers_fileops; |
f96b434d DT |
533 | |
534 | return 0; | |
535 | ||
536 | fail2: remove_proc_entry("devices", proc_bus_input_dir); | |
537 | fail1: remove_proc_entry("input", proc_bus); | |
538 | return -ENOMEM; | |
539 | } | |
540 | ||
beffbdc2 | 541 | static void input_proc_exit(void) |
f96b434d DT |
542 | { |
543 | remove_proc_entry("devices", proc_bus_input_dir); | |
544 | remove_proc_entry("handlers", proc_bus_input_dir); | |
545 | remove_proc_entry("input", proc_bus); | |
546 | } | |
547 | ||
548 | #else /* !CONFIG_PROC_FS */ | |
549 | static inline void input_wakeup_procfs_readers(void) { } | |
550 | static inline int input_proc_init(void) { return 0; } | |
551 | static inline void input_proc_exit(void) { } | |
552 | #endif | |
553 | ||
5c1e9a6a DT |
554 | #define INPUT_DEV_STRING_ATTR_SHOW(name) \ |
555 | static ssize_t input_dev_show_##name(struct class_device *dev, char *buf) \ | |
556 | { \ | |
557 | struct input_dev *input_dev = to_input_dev(dev); \ | |
558 | int retval; \ | |
559 | \ | |
e676c232 | 560 | retval = mutex_lock_interruptible(&input_dev->mutex); \ |
5c1e9a6a DT |
561 | if (retval) \ |
562 | return retval; \ | |
563 | \ | |
2db66876 DT |
564 | retval = scnprintf(buf, PAGE_SIZE, \ |
565 | "%s\n", input_dev->name ? input_dev->name : ""); \ | |
5c1e9a6a | 566 | \ |
e676c232 | 567 | mutex_unlock(&input_dev->mutex); \ |
5c1e9a6a DT |
568 | \ |
569 | return retval; \ | |
629b77a4 GKH |
570 | } \ |
571 | static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL); | |
5c1e9a6a DT |
572 | |
573 | INPUT_DEV_STRING_ATTR_SHOW(name); | |
574 | INPUT_DEV_STRING_ATTR_SHOW(phys); | |
575 | INPUT_DEV_STRING_ATTR_SHOW(uniq); | |
576 | ||
ac648a6a DT |
577 | static int input_print_modalias_bits(char *buf, int size, |
578 | char name, unsigned long *bm, | |
579 | unsigned int min_bit, unsigned int max_bit) | |
1d8f430c | 580 | { |
ac648a6a | 581 | int len = 0, i; |
1d8f430c | 582 | |
ac648a6a DT |
583 | len += snprintf(buf, max(size, 0), "%c", name); |
584 | for (i = min_bit; i < max_bit; i++) | |
585 | if (bm[LONG(i)] & BIT(i)) | |
586 | len += snprintf(buf + len, max(size - len, 0), "%X,", i); | |
1d8f430c RR |
587 | return len; |
588 | } | |
589 | ||
2db66876 DT |
590 | static int input_print_modalias(char *buf, int size, struct input_dev *id, |
591 | int add_cr) | |
1d8f430c | 592 | { |
bd37e5a9 | 593 | int len; |
1d8f430c | 594 | |
ac648a6a DT |
595 | len = snprintf(buf, max(size, 0), |
596 | "input:b%04Xv%04Xp%04Xe%04X-", | |
597 | id->id.bustype, id->id.vendor, | |
598 | id->id.product, id->id.version); | |
599 | ||
600 | len += input_print_modalias_bits(buf + len, size - len, | |
601 | 'e', id->evbit, 0, EV_MAX); | |
602 | len += input_print_modalias_bits(buf + len, size - len, | |
603 | 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX); | |
604 | len += input_print_modalias_bits(buf + len, size - len, | |
605 | 'r', id->relbit, 0, REL_MAX); | |
606 | len += input_print_modalias_bits(buf + len, size - len, | |
607 | 'a', id->absbit, 0, ABS_MAX); | |
608 | len += input_print_modalias_bits(buf + len, size - len, | |
609 | 'm', id->mscbit, 0, MSC_MAX); | |
610 | len += input_print_modalias_bits(buf + len, size - len, | |
611 | 'l', id->ledbit, 0, LED_MAX); | |
612 | len += input_print_modalias_bits(buf + len, size - len, | |
613 | 's', id->sndbit, 0, SND_MAX); | |
614 | len += input_print_modalias_bits(buf + len, size - len, | |
615 | 'f', id->ffbit, 0, FF_MAX); | |
616 | len += input_print_modalias_bits(buf + len, size - len, | |
617 | 'w', id->swbit, 0, SW_MAX); | |
2db66876 DT |
618 | |
619 | if (add_cr) | |
ac648a6a | 620 | len += snprintf(buf + len, max(size - len, 0), "\n"); |
2db66876 | 621 | |
bd37e5a9 KS |
622 | return len; |
623 | } | |
624 | ||
625 | static ssize_t input_dev_show_modalias(struct class_device *dev, char *buf) | |
626 | { | |
627 | struct input_dev *id = to_input_dev(dev); | |
628 | ssize_t len; | |
629 | ||
2db66876 DT |
630 | len = input_print_modalias(buf, PAGE_SIZE, id, 1); |
631 | ||
8a3cf456 | 632 | return min_t(int, len, PAGE_SIZE); |
1d8f430c RR |
633 | } |
634 | static CLASS_DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL); | |
635 | ||
629b77a4 GKH |
636 | static struct attribute *input_dev_attrs[] = { |
637 | &class_device_attr_name.attr, | |
638 | &class_device_attr_phys.attr, | |
639 | &class_device_attr_uniq.attr, | |
1d8f430c | 640 | &class_device_attr_modalias.attr, |
629b77a4 GKH |
641 | NULL |
642 | }; | |
643 | ||
bd0ef235 | 644 | static struct attribute_group input_dev_attr_group = { |
629b77a4 | 645 | .attrs = input_dev_attrs, |
5c1e9a6a DT |
646 | }; |
647 | ||
648 | #define INPUT_DEV_ID_ATTR(name) \ | |
649 | static ssize_t input_dev_show_id_##name(struct class_device *dev, char *buf) \ | |
650 | { \ | |
651 | struct input_dev *input_dev = to_input_dev(dev); \ | |
2db66876 | 652 | return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \ |
5c1e9a6a DT |
653 | } \ |
654 | static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL); | |
655 | ||
656 | INPUT_DEV_ID_ATTR(bustype); | |
657 | INPUT_DEV_ID_ATTR(vendor); | |
658 | INPUT_DEV_ID_ATTR(product); | |
659 | INPUT_DEV_ID_ATTR(version); | |
660 | ||
661 | static struct attribute *input_dev_id_attrs[] = { | |
662 | &class_device_attr_bustype.attr, | |
663 | &class_device_attr_vendor.attr, | |
664 | &class_device_attr_product.attr, | |
665 | &class_device_attr_version.attr, | |
666 | NULL | |
667 | }; | |
668 | ||
669 | static struct attribute_group input_dev_id_attr_group = { | |
670 | .name = "id", | |
671 | .attrs = input_dev_id_attrs, | |
672 | }; | |
673 | ||
969b21cd DT |
674 | static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap, |
675 | int max, int add_cr) | |
676 | { | |
677 | int i; | |
678 | int len = 0; | |
679 | ||
680 | for (i = NBITS(max) - 1; i > 0; i--) | |
681 | if (bitmap[i]) | |
682 | break; | |
683 | ||
684 | for (; i >= 0; i--) | |
685 | len += snprintf(buf + len, max(buf_size - len, 0), | |
686 | "%lx%s", bitmap[i], i > 0 ? " " : ""); | |
687 | ||
688 | if (add_cr) | |
689 | len += snprintf(buf + len, max(buf_size - len, 0), "\n"); | |
690 | ||
691 | return len; | |
692 | } | |
693 | ||
5c1e9a6a DT |
694 | #define INPUT_DEV_CAP_ATTR(ev, bm) \ |
695 | static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf) \ | |
696 | { \ | |
697 | struct input_dev *input_dev = to_input_dev(dev); \ | |
2db66876 DT |
698 | int len = input_print_bitmap(buf, PAGE_SIZE, \ |
699 | input_dev->bm##bit, ev##_MAX, 1); \ | |
700 | return min_t(int, len, PAGE_SIZE); \ | |
5c1e9a6a DT |
701 | } \ |
702 | static CLASS_DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL); | |
703 | ||
704 | INPUT_DEV_CAP_ATTR(EV, ev); | |
705 | INPUT_DEV_CAP_ATTR(KEY, key); | |
706 | INPUT_DEV_CAP_ATTR(REL, rel); | |
707 | INPUT_DEV_CAP_ATTR(ABS, abs); | |
708 | INPUT_DEV_CAP_ATTR(MSC, msc); | |
709 | INPUT_DEV_CAP_ATTR(LED, led); | |
710 | INPUT_DEV_CAP_ATTR(SND, snd); | |
711 | INPUT_DEV_CAP_ATTR(FF, ff); | |
712 | INPUT_DEV_CAP_ATTR(SW, sw); | |
713 | ||
714 | static struct attribute *input_dev_caps_attrs[] = { | |
715 | &class_device_attr_ev.attr, | |
716 | &class_device_attr_key.attr, | |
717 | &class_device_attr_rel.attr, | |
718 | &class_device_attr_abs.attr, | |
719 | &class_device_attr_msc.attr, | |
720 | &class_device_attr_led.attr, | |
721 | &class_device_attr_snd.attr, | |
722 | &class_device_attr_ff.attr, | |
723 | &class_device_attr_sw.attr, | |
724 | NULL | |
725 | }; | |
726 | ||
727 | static struct attribute_group input_dev_caps_attr_group = { | |
728 | .name = "capabilities", | |
729 | .attrs = input_dev_caps_attrs, | |
730 | }; | |
731 | ||
d19fbe8a DT |
732 | static void input_dev_release(struct class_device *class_dev) |
733 | { | |
734 | struct input_dev *dev = to_input_dev(class_dev); | |
735 | ||
736 | kfree(dev); | |
737 | module_put(THIS_MODULE); | |
738 | } | |
739 | ||
a7fadbe1 | 740 | /* |
312c004d | 741 | * Input uevent interface - loading event handlers based on |
a7fadbe1 DT |
742 | * device bitfields. |
743 | */ | |
312c004d | 744 | static int input_add_uevent_bm_var(char **envp, int num_envp, int *cur_index, |
ac648a6a DT |
745 | char *buffer, int buffer_size, int *cur_len, |
746 | const char *name, unsigned long *bitmap, int max) | |
a7fadbe1 DT |
747 | { |
748 | if (*cur_index >= num_envp - 1) | |
749 | return -ENOMEM; | |
750 | ||
751 | envp[*cur_index] = buffer + *cur_len; | |
752 | ||
753 | *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), name); | |
ac648a6a | 754 | if (*cur_len >= buffer_size) |
a7fadbe1 DT |
755 | return -ENOMEM; |
756 | ||
757 | *cur_len += input_print_bitmap(buffer + *cur_len, | |
758 | max(buffer_size - *cur_len, 0), | |
2db66876 | 759 | bitmap, max, 0) + 1; |
a7fadbe1 DT |
760 | if (*cur_len > buffer_size) |
761 | return -ENOMEM; | |
762 | ||
763 | (*cur_index)++; | |
764 | return 0; | |
765 | } | |
766 | ||
ac648a6a DT |
767 | static int input_add_uevent_modalias_var(char **envp, int num_envp, int *cur_index, |
768 | char *buffer, int buffer_size, int *cur_len, | |
769 | struct input_dev *dev) | |
770 | { | |
771 | if (*cur_index >= num_envp - 1) | |
772 | return -ENOMEM; | |
773 | ||
774 | envp[*cur_index] = buffer + *cur_len; | |
775 | ||
776 | *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), | |
777 | "MODALIAS="); | |
778 | if (*cur_len >= buffer_size) | |
779 | return -ENOMEM; | |
780 | ||
781 | *cur_len += input_print_modalias(buffer + *cur_len, | |
782 | max(buffer_size - *cur_len, 0), | |
783 | dev, 0) + 1; | |
784 | if (*cur_len > buffer_size) | |
785 | return -ENOMEM; | |
786 | ||
787 | (*cur_index)++; | |
788 | return 0; | |
789 | } | |
790 | ||
a7fadbe1 DT |
791 | #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \ |
792 | do { \ | |
ac648a6a | 793 | int err = add_uevent_var(envp, num_envp, &i, \ |
a7fadbe1 DT |
794 | buffer, buffer_size, &len, \ |
795 | fmt, val); \ | |
796 | if (err) \ | |
797 | return err; \ | |
798 | } while (0) | |
799 | ||
800 | #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \ | |
801 | do { \ | |
312c004d | 802 | int err = input_add_uevent_bm_var(envp, num_envp, &i, \ |
a7fadbe1 DT |
803 | buffer, buffer_size, &len, \ |
804 | name, bm, max); \ | |
805 | if (err) \ | |
806 | return err; \ | |
807 | } while (0) | |
808 | ||
ac648a6a DT |
809 | #define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev) \ |
810 | do { \ | |
811 | int err = input_add_uevent_modalias_var(envp, \ | |
812 | num_envp, &i, \ | |
813 | buffer, buffer_size, &len, \ | |
814 | dev); \ | |
815 | if (err) \ | |
816 | return err; \ | |
817 | } while (0) | |
818 | ||
312c004d KS |
819 | static int input_dev_uevent(struct class_device *cdev, char **envp, |
820 | int num_envp, char *buffer, int buffer_size) | |
a7fadbe1 DT |
821 | { |
822 | struct input_dev *dev = to_input_dev(cdev); | |
823 | int i = 0; | |
824 | int len = 0; | |
825 | ||
826 | INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x", | |
827 | dev->id.bustype, dev->id.vendor, | |
828 | dev->id.product, dev->id.version); | |
829 | if (dev->name) | |
830 | INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name); | |
831 | if (dev->phys) | |
832 | INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys); | |
08de1f04 | 833 | if (dev->uniq) |
a7fadbe1 DT |
834 | INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq); |
835 | ||
836 | INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX); | |
837 | if (test_bit(EV_KEY, dev->evbit)) | |
838 | INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX); | |
839 | if (test_bit(EV_REL, dev->evbit)) | |
840 | INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX); | |
841 | if (test_bit(EV_ABS, dev->evbit)) | |
842 | INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX); | |
843 | if (test_bit(EV_MSC, dev->evbit)) | |
844 | INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX); | |
845 | if (test_bit(EV_LED, dev->evbit)) | |
846 | INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX); | |
847 | if (test_bit(EV_SND, dev->evbit)) | |
848 | INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX); | |
849 | if (test_bit(EV_FF, dev->evbit)) | |
850 | INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX); | |
851 | if (test_bit(EV_SW, dev->evbit)) | |
852 | INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX); | |
853 | ||
ac648a6a | 854 | INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev); |
a7fadbe1 | 855 | |
bd37e5a9 | 856 | envp[i] = NULL; |
a7fadbe1 DT |
857 | return 0; |
858 | } | |
859 | ||
ea9f240b GKH |
860 | struct class input_class = { |
861 | .name = "input", | |
d19fbe8a | 862 | .release = input_dev_release, |
312c004d | 863 | .uevent = input_dev_uevent, |
d19fbe8a | 864 | }; |
ca56fe07 | 865 | EXPORT_SYMBOL_GPL(input_class); |
d19fbe8a DT |
866 | |
867 | struct input_dev *input_allocate_device(void) | |
868 | { | |
869 | struct input_dev *dev; | |
870 | ||
871 | dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL); | |
872 | if (dev) { | |
873 | dev->dynalloc = 1; | |
ea9f240b | 874 | dev->cdev.class = &input_class; |
d19fbe8a | 875 | class_device_initialize(&dev->cdev); |
f60d2b11 | 876 | mutex_init(&dev->mutex); |
d19fbe8a DT |
877 | INIT_LIST_HEAD(&dev->h_list); |
878 | INIT_LIST_HEAD(&dev->node); | |
879 | } | |
880 | ||
881 | return dev; | |
882 | } | |
ca56fe07 | 883 | EXPORT_SYMBOL(input_allocate_device); |
d19fbe8a | 884 | |
f60d2b11 DT |
885 | void input_free_device(struct input_dev *dev) |
886 | { | |
887 | if (dev) { | |
888 | ||
889 | mutex_lock(&dev->mutex); | |
890 | dev->name = dev->phys = dev->uniq = NULL; | |
891 | mutex_unlock(&dev->mutex); | |
892 | ||
893 | input_put_device(dev); | |
894 | } | |
895 | } | |
ca56fe07 | 896 | EXPORT_SYMBOL(input_free_device); |
f60d2b11 | 897 | |
5f945489 | 898 | int input_register_device(struct input_dev *dev) |
1da177e4 | 899 | { |
bd0ef235 | 900 | static atomic_t input_no = ATOMIC_INIT(0); |
1da177e4 LT |
901 | struct input_handle *handle; |
902 | struct input_handler *handler; | |
903 | struct input_device_id *id; | |
bd0ef235 DT |
904 | const char *path; |
905 | int error; | |
1da177e4 | 906 | |
5f945489 DT |
907 | if (!dev->dynalloc) { |
908 | printk(KERN_WARNING "input: device %s is statically allocated, will not register\n" | |
909 | "Please convert to input_allocate_device() or contact dtor_core@ameritech.net\n", | |
910 | dev->name ? dev->name : "<Unknown>"); | |
911 | return -EINVAL; | |
912 | } | |
1da177e4 | 913 | |
5f945489 | 914 | set_bit(EV_SYN, dev->evbit); |
0fbf87ca | 915 | |
1da177e4 LT |
916 | /* |
917 | * If delay and period are pre-set by the driver, then autorepeating | |
918 | * is handled by the driver itself and we don't do it in input.c. | |
919 | */ | |
920 | ||
921 | init_timer(&dev->timer); | |
922 | if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) { | |
923 | dev->timer.data = (long) dev; | |
924 | dev->timer.function = input_repeat_key; | |
925 | dev->rep[REP_DELAY] = 250; | |
926 | dev->rep[REP_PERIOD] = 33; | |
927 | } | |
928 | ||
929 | INIT_LIST_HEAD(&dev->h_list); | |
930 | list_add_tail(&dev->node, &input_dev_list); | |
931 | ||
bd0ef235 DT |
932 | dev->cdev.class = &input_class; |
933 | snprintf(dev->cdev.class_id, sizeof(dev->cdev.class_id), | |
934 | "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1); | |
935 | ||
936 | error = class_device_add(&dev->cdev); | |
937 | if (error) | |
938 | return error; | |
939 | ||
940 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_attr_group); | |
941 | if (error) | |
942 | goto fail1; | |
943 | ||
944 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_id_attr_group); | |
945 | if (error) | |
946 | goto fail2; | |
947 | ||
948 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_caps_attr_group); | |
949 | if (error) | |
950 | goto fail3; | |
951 | ||
952 | __module_get(THIS_MODULE); | |
953 | ||
954 | path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL); | |
955 | printk(KERN_INFO "input: %s as %s\n", | |
956 | dev->name ? dev->name : "Unspecified device", path ? path : "N/A"); | |
957 | kfree(path); | |
10204020 | 958 | |
1da177e4 LT |
959 | list_for_each_entry(handler, &input_handler_list, node) |
960 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) | |
961 | if ((id = input_match_device(handler->id_table, dev))) | |
c7e8dc6e | 962 | if ((handle = handler->connect(handler, dev, id))) { |
1da177e4 | 963 | input_link_handle(handle); |
c7e8dc6e DT |
964 | if (handler->start) |
965 | handler->start(handle); | |
966 | } | |
1da177e4 | 967 | |
f96b434d | 968 | input_wakeup_procfs_readers(); |
5f945489 DT |
969 | |
970 | return 0; | |
bd0ef235 DT |
971 | |
972 | fail3: sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group); | |
973 | fail2: sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group); | |
974 | fail1: class_device_del(&dev->cdev); | |
975 | return error; | |
1da177e4 | 976 | } |
ca56fe07 | 977 | EXPORT_SYMBOL(input_register_device); |
1da177e4 LT |
978 | |
979 | void input_unregister_device(struct input_dev *dev) | |
980 | { | |
1e0afb28 | 981 | struct list_head *node, *next; |
1da177e4 | 982 | |
1e0afb28 DT |
983 | if (!dev) |
984 | return; | |
1da177e4 LT |
985 | |
986 | del_timer_sync(&dev->timer); | |
987 | ||
988 | list_for_each_safe(node, next, &dev->h_list) { | |
989 | struct input_handle * handle = to_handle(node); | |
990 | list_del_init(&handle->d_node); | |
991 | list_del_init(&handle->h_node); | |
992 | handle->handler->disconnect(handle); | |
993 | } | |
994 | ||
1da177e4 LT |
995 | list_del_init(&dev->node); |
996 | ||
5f945489 DT |
997 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group); |
998 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group); | |
bd0ef235 | 999 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group); |
d19fbe8a | 1000 | |
f60d2b11 DT |
1001 | mutex_lock(&dev->mutex); |
1002 | dev->name = dev->phys = dev->uniq = NULL; | |
1003 | mutex_unlock(&dev->mutex); | |
1004 | ||
e7374e48 DT |
1005 | class_device_unregister(&dev->cdev); |
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); |