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Input: i8042 - add Fujitsu touchscreen/touchpad PNP IDs
[deliverable/linux.git] / drivers / input / input.c
CommitLineData
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>
1da177e4
LT		 14#include <linux/smp_lock.h>
15#include <linux/input.h>
16#include <linux/module.h>
17#include <linux/random.h>
18#include <linux/major.h>
19#include <linux/proc_fs.h>
969b21cd 20#include <linux/seq_file.h>
1da177e4
LT		 21#include <linux/interrupt.h>
22#include <linux/poll.h>
23#include <linux/device.h>
e676c232 24#include <linux/mutex.h>
1da177e4
LT		 25
26MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
27MODULE_DESCRIPTION("Input core");
28MODULE_LICENSE("GPL");
29
1da177e4
LT		 30#define INPUT_DEVICES 256
31
32static LIST_HEAD(input_dev_list);
33static LIST_HEAD(input_handler_list);
34
35static struct input_handler *input_table[8];
36
0e739d28
DT		 37/**
38 * input_event() - report new input event
1447190e 39 * @dev: device that generated the event
0e739d28
DT		 40 * @type: type of the event
41 * @code: event code
42 * @value: value of the event
43 *
44 * This function should be used by drivers implementing various input devices
45 * See also input_inject_event()
46 */
1da177e4
LT		 47void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
48{
49 struct input_handle *handle;
50
51 if (type > EV_MAX || !test_bit(type, dev->evbit))
52 return;
53
54 add_input_randomness(type, code, value);
55
56 switch (type) {
57
58 case EV_SYN:
59 switch (code) {
60 case SYN_CONFIG:
1e0afb28
DT		 61 if (dev->event)
62 dev->event(dev, type, code, value);
1da177e4
LT		 63 break;
64
65 case SYN_REPORT:
1e0afb28
DT		 66 if (dev->sync)
67 return;
1da177e4
LT		 68 dev->sync = 1;
69 break;
70 }
71 break;
72
73 case EV_KEY:
74
75 if (code > KEY_MAX || !test_bit(code, dev->keybit) || !!test_bit(code, dev->key) == value)
76 return;
77
78 if (value == 2)
79 break;
80
81 change_bit(code, dev->key);
82
83 if (test_bit(EV_REP, dev->evbit) && dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && dev->timer.data && value) {
84 dev->repeat_key = code;
85 mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_DELAY]));
86 }
87
88 break;
89
31581066
RP		 90 case EV_SW:
91
92 if (code > SW_MAX || !test_bit(code, dev->swbit) || !!test_bit(code, dev->sw) == value)
93 return;
94
95 change_bit(code, dev->sw);
96
97 break;
98
1da177e4
LT		 99 case EV_ABS:
100
101 if (code > ABS_MAX || !test_bit(code, dev->absbit))
102 return;
103
104 if (dev->absfuzz[code]) {
105 if ((value > dev->abs[code] - (dev->absfuzz[code] >> 1)) &&
106 (value < dev->abs[code] + (dev->absfuzz[code] >> 1)))
107 return;
108
109 if ((value > dev->abs[code] - dev->absfuzz[code]) &&
110 (value < dev->abs[code] + dev->absfuzz[code]))
111 value = (dev->abs[code] * 3 + value) >> 2;
112
113 if ((value > dev->abs[code] - (dev->absfuzz[code] << 1)) &&
114 (value < dev->abs[code] + (dev->absfuzz[code] << 1)))
115 value = (dev->abs[code] + value) >> 1;
116 }
117
118 if (dev->abs[code] == value)
119 return;
120
121 dev->abs[code] = value;
122 break;
123
124 case EV_REL:
125
126 if (code > REL_MAX || !test_bit(code, dev->relbit) || (value == 0))
127 return;
128
129 break;
130
131 case EV_MSC:
132
133 if (code > MSC_MAX || !test_bit(code, dev->mscbit))
134 return;
135
1e0afb28
DT		 136 if (dev->event)
137 dev->event(dev, type, code, value);
1da177e4
LT		 138
139 break;
140
141 case EV_LED:
142
143 if (code > LED_MAX || !test_bit(code, dev->ledbit) || !!test_bit(code, dev->led) == value)
144 return;
145
146 change_bit(code, dev->led);
1e0afb28
DT		 147
148 if (dev->event)
149 dev->event(dev, type, code, value);
1da177e4
LT		 150
151 break;
152
153 case EV_SND:
154
155 if (code > SND_MAX || !test_bit(code, dev->sndbit))
156 return;
157
8fdc1948
DT		 158 if (!!test_bit(code, dev->snd) != !!value)
159 change_bit(code, dev->snd);
160
1e0afb28
DT		 161 if (dev->event)
162 dev->event(dev, type, code, value);
1da177e4
LT		 163
164 break;
165
166 case EV_REP:
167
1e0afb28
DT		 168 if (code > REP_MAX || value < 0 || dev->rep[code] == value)
169 return;
1da177e4
LT		 170
171 dev->rep[code] = value;
1e0afb28
DT		 172 if (dev->event)
173 dev->event(dev, type, code, value);
1da177e4
LT		 174
175 break;
176
177 case EV_FF:
509ca1a9
AH		 178
179 if (value < 0)
180 return;
181
1e0afb28
DT		 182 if (dev->event)
183 dev->event(dev, type, code, value);
1da177e4
LT		 184 break;
185 }
186
187 if (type != EV_SYN)
188 dev->sync = 0;
189
190 if (dev->grab)
191 dev->grab->handler->event(dev->grab, type, code, value);
192 else
193 list_for_each_entry(handle, &dev->h_list, d_node)
194 if (handle->open)
195 handle->handler->event(handle, type, code, value);
196}
ca56fe07 197EXPORT_SYMBOL(input_event);
1da177e4 198
0e739d28
DT		 199/**
200 * input_inject_event() - send input event from input handler
201 * @handle: input handle to send event through
202 * @type: type of the event
203 * @code: event code
204 * @value: value of the event
205 *
206 * Similar to input_event() but will ignore event if device is "grabbed" and handle
207 * injecting event is not the one that owns the device.
208 */
209void input_inject_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
210{
211 if (!handle->dev->grab || handle->dev->grab == handle)
212 input_event(handle->dev, type, code, value);
213}
214EXPORT_SYMBOL(input_inject_event);
215
1da177e4
LT		 216static void input_repeat_key(unsigned long data)
217{
218 struct input_dev *dev = (void *) data;
219
220 if (!test_bit(dev->repeat_key, dev->key))
221 return;
222
223 input_event(dev, EV_KEY, dev->repeat_key, 2);
224 input_sync(dev);
225
226 if (dev->rep[REP_PERIOD])
227 mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_PERIOD]));
228}
229
1da177e4
LT		 230int input_grab_device(struct input_handle *handle)
231{
232 if (handle->dev->grab)
233 return -EBUSY;
234
235 handle->dev->grab = handle;
236 return 0;
237}
ca56fe07 238EXPORT_SYMBOL(input_grab_device);
1da177e4
LT		 239
240void input_release_device(struct input_handle *handle)
241{
a2b2ed2c 242 struct input_dev *dev = handle->dev;
c7e8dc6e 243
a2b2ed2c
AM		 244 if (dev->grab == handle) {
245 dev->grab = NULL;
246
247 list_for_each_entry(handle, &dev->h_list, d_node)
c7e8dc6e
DT		 248 if (handle->handler->start)
249 handle->handler->start(handle);
250 }
1da177e4 251}
ca56fe07 252EXPORT_SYMBOL(input_release_device);
1da177e4
LT		 253
254int input_open_device(struct input_handle *handle)
255{
0fbf87ca
DT		 256 struct input_dev *dev = handle->dev;
257 int err;
258
e676c232 259 err = mutex_lock_interruptible(&dev->mutex);
0fbf87ca
DT		 260 if (err)
261 return err;
262
1da177e4 263 handle->open++;
0fbf87ca
DT		 264
265 if (!dev->users++ && dev->open)
266 err = dev->open(dev);
267
268 if (err)
269 handle->open--;
270
e676c232 271 mutex_unlock(&dev->mutex);
0fbf87ca
DT		 272
273 return err;
1da177e4 274}
ca56fe07 275EXPORT_SYMBOL(input_open_device);
1da177e4
LT		 276
277int input_flush_device(struct input_handle* handle, struct file* file)
278{
279 if (handle->dev->flush)
280 return handle->dev->flush(handle->dev, file);
281
282 return 0;
283}
ca56fe07 284EXPORT_SYMBOL(input_flush_device);
1da177e4
LT		 285
286void input_close_device(struct input_handle *handle)
287{
0fbf87ca
DT		 288 struct input_dev *dev = handle->dev;
289
1da177e4 290 input_release_device(handle);
0fbf87ca 291
e676c232 292 mutex_lock(&dev->mutex);
0fbf87ca
DT		 293
294 if (!--dev->users && dev->close)
295 dev->close(dev);
1da177e4 296 handle->open--;
0fbf87ca 297
e676c232 298 mutex_unlock(&dev->mutex);
1da177e4 299}
ca56fe07 300EXPORT_SYMBOL(input_close_device);
1da177e4 301
c8e4c772
MR		 302static int input_fetch_keycode(struct input_dev *dev, int scancode)
303{
304 switch (dev->keycodesize) {
305 case 1:
306 return ((u8 *)dev->keycode)[scancode];
307
308 case 2:
309 return ((u16 *)dev->keycode)[scancode];
310
311 default:
312 return ((u32 *)dev->keycode)[scancode];
313 }
314}
315
316static int input_default_getkeycode(struct input_dev *dev,
317 int scancode, int *keycode)
318{
319 if (!dev->keycodesize)
320 return -EINVAL;
321
322 if (scancode < 0 || scancode >= dev->keycodemax)
323 return -EINVAL;
324
325 *keycode = input_fetch_keycode(dev, scancode);
326
327 return 0;
328}
329
330static int input_default_setkeycode(struct input_dev *dev,
331 int scancode, int keycode)
332{
333 int old_keycode;
334 int i;
335
336 if (scancode < 0 || scancode >= dev->keycodemax)
337 return -EINVAL;
338
339 if (keycode < 0 || keycode > KEY_MAX)
340 return -EINVAL;
341
342 if (!dev->keycodesize)
343 return -EINVAL;
344
345 if (dev->keycodesize < sizeof(keycode) && (keycode >> (dev->keycodesize * 8)))
346 return -EINVAL;
347
348 switch (dev->keycodesize) {
349 case 1: {
350 u8 *k = (u8 *)dev->keycode;
351 old_keycode = k[scancode];
352 k[scancode] = keycode;
353 break;
354 }
355 case 2: {
356 u16 *k = (u16 *)dev->keycode;
357 old_keycode = k[scancode];
358 k[scancode] = keycode;
359 break;
360 }
361 default: {
362 u32 *k = (u32 *)dev->keycode;
363 old_keycode = k[scancode];
364 k[scancode] = keycode;
365 break;
366 }
367 }
368
369 clear_bit(old_keycode, dev->keybit);
370 set_bit(keycode, dev->keybit);
371
372 for (i = 0; i < dev->keycodemax; i++) {
373 if (input_fetch_keycode(dev, i) == old_keycode) {
374 set_bit(old_keycode, dev->keybit);
375 break; /* Setting the bit twice is useless, so break */
376 }
377 }
378
379 return 0;
380}
381
382
1da177e4
LT		 383#define MATCH_BIT(bit, max) \
384 for (i = 0; i < NBITS(max); i++) \
385 if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \
386 break; \
387 if (i != NBITS(max)) \
388 continue;
389
66e66118
DT		 390static const struct input_device_id *input_match_device(const struct input_device_id *id,
391 struct input_dev *dev)
1da177e4
LT		 392{
393 int i;
394
395 for (; id->flags || id->driver_info; id++) {
396
397 if (id->flags & INPUT_DEVICE_ID_MATCH_BUS)
ddc5d341 398 if (id->bustype != dev->id.bustype)
1da177e4
LT		 399 continue;
400
401 if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR)
ddc5d341 402 if (id->vendor != dev->id.vendor)
1da177e4
LT		 403 continue;
404
405 if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT)
ddc5d341 406 if (id->product != dev->id.product)
1da177e4
LT		 407 continue;
408
409 if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION)
ddc5d341 410 if (id->version != dev->id.version)
1da177e4
LT		 411 continue;
412
413 MATCH_BIT(evbit, EV_MAX);
414 MATCH_BIT(keybit, KEY_MAX);
415 MATCH_BIT(relbit, REL_MAX);
416 MATCH_BIT(absbit, ABS_MAX);
417 MATCH_BIT(mscbit, MSC_MAX);
418 MATCH_BIT(ledbit, LED_MAX);
419 MATCH_BIT(sndbit, SND_MAX);
420 MATCH_BIT(ffbit, FF_MAX);
ff13f98b 421 MATCH_BIT(swbit, SW_MAX);
1da177e4
LT		 422
423 return id;
424 }
425
426 return NULL;
427}
428
5b2a0826
DT		 429static int input_attach_handler(struct input_dev *dev, struct input_handler *handler)
430{
431 const struct input_device_id *id;
432 int error;
433
434 if (handler->blacklist && input_match_device(handler->blacklist, dev))
435 return -ENODEV;
436
437 id = input_match_device(handler->id_table, dev);
438 if (!id)
439 return -ENODEV;
440
441 error = handler->connect(handler, dev, id);
442 if (error && error != -ENODEV)
443 printk(KERN_ERR
444 "input: failed to attach handler %s to device %s, "
445 "error: %d\n",
446 handler->name, kobject_name(&dev->cdev.kobj), error);
447
448 return error;
449}
450
451
f96b434d
DT		 452#ifdef CONFIG_PROC_FS
453
454static struct proc_dir_entry *proc_bus_input_dir;
455static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait);
456static int input_devices_state;
457
458static inline void input_wakeup_procfs_readers(void)
459{
460 input_devices_state++;
461 wake_up(&input_devices_poll_wait);
462}
463
969b21cd 464static unsigned int input_proc_devices_poll(struct file *file, poll_table *wait)
f96b434d
DT		 465{
466 int state = input_devices_state;
1e0afb28 467
f96b434d
DT		 468 poll_wait(file, &input_devices_poll_wait, wait);
469 if (state != input_devices_state)
470 return POLLIN | POLLRDNORM;
1e0afb28 471
f96b434d
DT		 472 return 0;
473}
474
969b21cd
DT		 475static struct list_head *list_get_nth_element(struct list_head *list, loff_t *pos)
476{
477 struct list_head *node;
478 loff_t i = 0;
f96b434d 479
969b21cd
DT		 480 list_for_each(node, list)
481 if (i++ == *pos)
482 return node;
483
484 return NULL;
485}
f96b434d 486
969b21cd 487static struct list_head *list_get_next_element(struct list_head *list, struct list_head *element, loff_t *pos)
f96b434d 488{
969b21cd
DT		 489 if (element->next == list)
490 return NULL;
f96b434d 491
969b21cd
DT		 492 ++(*pos);
493 return element->next;
494}
f96b434d 495
969b21cd
DT		 496static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos)
497{
498 /* acquire lock here ... Yes, we do need locking, I knowi, I know... */
f96b434d 499
969b21cd
DT		 500 return list_get_nth_element(&input_dev_list, pos);
501}
051b2fea 502
969b21cd
DT		 503static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos)
504{
505 return list_get_next_element(&input_dev_list, v, pos);
506}
f96b434d 507
969b21cd
DT		 508static void input_devices_seq_stop(struct seq_file *seq, void *v)
509{
510 /* release lock here */
511}
f96b434d 512
969b21cd
DT		 513static void input_seq_print_bitmap(struct seq_file *seq, const char *name,
514 unsigned long *bitmap, int max)
515{
516 int i;
051b2fea 517
969b21cd
DT		 518 for (i = NBITS(max) - 1; i > 0; i--)
519 if (bitmap[i])
520 break;
f96b434d 521
969b21cd
DT		 522 seq_printf(seq, "B: %s=", name);
523 for (; i >= 0; i--)
524 seq_printf(seq, "%lx%s", bitmap[i], i > 0 ? " " : "");
525 seq_putc(seq, '\n');
526}
f96b434d 527
969b21cd
DT		 528static int input_devices_seq_show(struct seq_file *seq, void *v)
529{
530 struct input_dev *dev = container_of(v, struct input_dev, node);
531 const char *path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL);
532 struct input_handle *handle;
533
534 seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n",
535 dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version);
536
537 seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : "");
538 seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : "");
539 seq_printf(seq, "S: Sysfs=%s\n", path ? path : "");
15e03ae8 540 seq_printf(seq, "U: Uniq=%s\n", dev->uniq ? dev->uniq : "");
969b21cd
DT		 541 seq_printf(seq, "H: Handlers=");
542
543 list_for_each_entry(handle, &dev->h_list, d_node)
544 seq_printf(seq, "%s ", handle->name);
545 seq_putc(seq, '\n');
546
547 input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX);
548 if (test_bit(EV_KEY, dev->evbit))
549 input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX);
550 if (test_bit(EV_REL, dev->evbit))
551 input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX);
552 if (test_bit(EV_ABS, dev->evbit))
553 input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX);
554 if (test_bit(EV_MSC, dev->evbit))
555 input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX);
556 if (test_bit(EV_LED, dev->evbit))
557 input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX);
558 if (test_bit(EV_SND, dev->evbit))
559 input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX);
560 if (test_bit(EV_FF, dev->evbit))
561 input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX);
562 if (test_bit(EV_SW, dev->evbit))
563 input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX);
564
565 seq_putc(seq, '\n');
566
567 kfree(path);
568 return 0;
f96b434d
DT		 569}
570
969b21cd
DT		 571static struct seq_operations input_devices_seq_ops = {
572 .start = input_devices_seq_start,
573 .next = input_devices_seq_next,
574 .stop = input_devices_seq_stop,
575 .show = input_devices_seq_show,
576};
577
578static int input_proc_devices_open(struct inode *inode, struct file *file)
f96b434d 579{
969b21cd
DT		 580 return seq_open(file, &input_devices_seq_ops);
581}
582
2b8693c0 583static const struct file_operations input_devices_fileops = {
969b21cd
DT		 584 .owner = THIS_MODULE,
585 .open = input_proc_devices_open,
586 .poll = input_proc_devices_poll,
587 .read = seq_read,
588 .llseek = seq_lseek,
589 .release = seq_release,
590};
591
592static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos)
593{
594 /* acquire lock here ... Yes, we do need locking, I knowi, I know... */
595 seq->private = (void *)(unsigned long)*pos;
596 return list_get_nth_element(&input_handler_list, pos);
597}
f96b434d 598
969b21cd
DT		 599static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos)
600{
601 seq->private = (void *)(unsigned long)(*pos + 1);
602 return list_get_next_element(&input_handler_list, v, pos);
f96b434d
DT		 603}
604
969b21cd
DT		 605static void input_handlers_seq_stop(struct seq_file *seq, void *v)
606{
607 /* release lock here */
608}
609
610static int input_handlers_seq_show(struct seq_file *seq, void *v)
611{
612 struct input_handler *handler = container_of(v, struct input_handler, node);
613
614 seq_printf(seq, "N: Number=%ld Name=%s",
615 (unsigned long)seq->private, handler->name);
616 if (handler->fops)
617 seq_printf(seq, " Minor=%d", handler->minor);
618 seq_putc(seq, '\n');
619
620 return 0;
621}
622static struct seq_operations input_handlers_seq_ops = {
623 .start = input_handlers_seq_start,
624 .next = input_handlers_seq_next,
625 .stop = input_handlers_seq_stop,
626 .show = input_handlers_seq_show,
627};
628
629static int input_proc_handlers_open(struct inode *inode, struct file *file)
630{
631 return seq_open(file, &input_handlers_seq_ops);
632}
633
2b8693c0 634static const struct file_operations input_handlers_fileops = {
969b21cd
DT		 635 .owner = THIS_MODULE,
636 .open = input_proc_handlers_open,
637 .read = seq_read,
638 .llseek = seq_lseek,
639 .release = seq_release,
640};
f96b434d
DT		 641
642static int __init input_proc_init(void)
643{
644 struct proc_dir_entry *entry;
645
646 proc_bus_input_dir = proc_mkdir("input", proc_bus);
647 if (!proc_bus_input_dir)
648 return -ENOMEM;
649
650 proc_bus_input_dir->owner = THIS_MODULE;
651
969b21cd 652 entry = create_proc_entry("devices", 0, proc_bus_input_dir);
f96b434d
DT		 653 if (!entry)
654 goto fail1;
655
656 entry->owner = THIS_MODULE;
969b21cd 657 entry->proc_fops = &input_devices_fileops;
f96b434d 658
969b21cd 659 entry = create_proc_entry("handlers", 0, proc_bus_input_dir);
f96b434d
DT		 660 if (!entry)
661 goto fail2;
662
663 entry->owner = THIS_MODULE;
969b21cd 664 entry->proc_fops = &input_handlers_fileops;
f96b434d
DT		 665
666 return 0;
667
668 fail2: remove_proc_entry("devices", proc_bus_input_dir);
669 fail1: remove_proc_entry("input", proc_bus);
670 return -ENOMEM;
671}
672
beffbdc2 673static void input_proc_exit(void)
f96b434d
DT		 674{
675 remove_proc_entry("devices", proc_bus_input_dir);
676 remove_proc_entry("handlers", proc_bus_input_dir);
677 remove_proc_entry("input", proc_bus);
678}
679
680#else /* !CONFIG_PROC_FS */
681static inline void input_wakeup_procfs_readers(void) { }
682static inline int input_proc_init(void) { return 0; }
683static inline void input_proc_exit(void) { }
684#endif
685
5c1e9a6a
DT		 686#define INPUT_DEV_STRING_ATTR_SHOW(name) \
687static ssize_t input_dev_show_##name(struct class_device *dev, char *buf) \
688{ \
689 struct input_dev *input_dev = to_input_dev(dev); \
5c1e9a6a 690 \
1efa770f
DT		 691 return scnprintf(buf, PAGE_SIZE, "%s\n", \
692 input_dev->name ? input_dev->name : ""); \
629b77a4
GKH		 693} \
694static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL);
5c1e9a6a
DT		 695
696INPUT_DEV_STRING_ATTR_SHOW(name);
697INPUT_DEV_STRING_ATTR_SHOW(phys);
698INPUT_DEV_STRING_ATTR_SHOW(uniq);
699
ac648a6a
DT		 700static int input_print_modalias_bits(char *buf, int size,
701 char name, unsigned long *bm,
702 unsigned int min_bit, unsigned int max_bit)
1d8f430c 703{
ac648a6a 704 int len = 0, i;
1d8f430c 705
ac648a6a
DT		 706 len += snprintf(buf, max(size, 0), "%c", name);
707 for (i = min_bit; i < max_bit; i++)
708 if (bm[LONG(i)] & BIT(i))
709 len += snprintf(buf + len, max(size - len, 0), "%X,", i);
1d8f430c
RR		 710 return len;
711}
712
2db66876
DT		 713static int input_print_modalias(char *buf, int size, struct input_dev *id,
714 int add_cr)
1d8f430c 715{
bd37e5a9 716 int len;
1d8f430c 717
ac648a6a
DT		 718 len = snprintf(buf, max(size, 0),
719 "input:b%04Xv%04Xp%04Xe%04X-",
720 id->id.bustype, id->id.vendor,
721 id->id.product, id->id.version);
722
723 len += input_print_modalias_bits(buf + len, size - len,
724 'e', id->evbit, 0, EV_MAX);
725 len += input_print_modalias_bits(buf + len, size - len,
726 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX);
727 len += input_print_modalias_bits(buf + len, size - len,
728 'r', id->relbit, 0, REL_MAX);
729 len += input_print_modalias_bits(buf + len, size - len,
730 'a', id->absbit, 0, ABS_MAX);
731 len += input_print_modalias_bits(buf + len, size - len,
732 'm', id->mscbit, 0, MSC_MAX);
733 len += input_print_modalias_bits(buf + len, size - len,
734 'l', id->ledbit, 0, LED_MAX);
735 len += input_print_modalias_bits(buf + len, size - len,
736 's', id->sndbit, 0, SND_MAX);
737 len += input_print_modalias_bits(buf + len, size - len,
738 'f', id->ffbit, 0, FF_MAX);
739 len += input_print_modalias_bits(buf + len, size - len,
740 'w', id->swbit, 0, SW_MAX);
2db66876
DT		 741
742 if (add_cr)
ac648a6a 743 len += snprintf(buf + len, max(size - len, 0), "\n");
2db66876 744
bd37e5a9
KS		 745 return len;
746}
747
748static ssize_t input_dev_show_modalias(struct class_device *dev, char *buf)
749{
750 struct input_dev *id = to_input_dev(dev);
751 ssize_t len;
752
2db66876
DT		 753 len = input_print_modalias(buf, PAGE_SIZE, id, 1);
754
8a3cf456 755 return min_t(int, len, PAGE_SIZE);
1d8f430c
RR		 756}
757static CLASS_DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL);
758
629b77a4
GKH		 759static struct attribute *input_dev_attrs[] = {
760 &class_device_attr_name.attr,
761 &class_device_attr_phys.attr,
762 &class_device_attr_uniq.attr,
1d8f430c 763 &class_device_attr_modalias.attr,
629b77a4
GKH		 764 NULL
765};
766
bd0ef235 767static struct attribute_group input_dev_attr_group = {
629b77a4 768 .attrs = input_dev_attrs,
5c1e9a6a
DT		 769};
770
771#define INPUT_DEV_ID_ATTR(name) \
772static ssize_t input_dev_show_id_##name(struct class_device *dev, char *buf) \
773{ \
774 struct input_dev *input_dev = to_input_dev(dev); \
2db66876 775 return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \
5c1e9a6a
DT		 776} \
777static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL);
778
779INPUT_DEV_ID_ATTR(bustype);
780INPUT_DEV_ID_ATTR(vendor);
781INPUT_DEV_ID_ATTR(product);
782INPUT_DEV_ID_ATTR(version);
783
784static struct attribute *input_dev_id_attrs[] = {
785 &class_device_attr_bustype.attr,
786 &class_device_attr_vendor.attr,
787 &class_device_attr_product.attr,
788 &class_device_attr_version.attr,
789 NULL
790};
791
792static struct attribute_group input_dev_id_attr_group = {
793 .name = "id",
794 .attrs = input_dev_id_attrs,
795};
796
969b21cd
DT		 797static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap,
798 int max, int add_cr)
799{
800 int i;
801 int len = 0;
802
803 for (i = NBITS(max) - 1; i > 0; i--)
804 if (bitmap[i])
805 break;
806
807 for (; i >= 0; i--)
808 len += snprintf(buf + len, max(buf_size - len, 0),
809 "%lx%s", bitmap[i], i > 0 ? " " : "");
810
811 if (add_cr)
812 len += snprintf(buf + len, max(buf_size - len, 0), "\n");
813
814 return len;
815}
816
5c1e9a6a
DT		 817#define INPUT_DEV_CAP_ATTR(ev, bm) \
818static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf) \
819{ \
820 struct input_dev *input_dev = to_input_dev(dev); \
2db66876
DT		 821 int len = input_print_bitmap(buf, PAGE_SIZE, \
822 input_dev->bm##bit, ev##_MAX, 1); \
823 return min_t(int, len, PAGE_SIZE); \
5c1e9a6a
DT		 824} \
825static CLASS_DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL);
826
827INPUT_DEV_CAP_ATTR(EV, ev);
828INPUT_DEV_CAP_ATTR(KEY, key);
829INPUT_DEV_CAP_ATTR(REL, rel);
830INPUT_DEV_CAP_ATTR(ABS, abs);
831INPUT_DEV_CAP_ATTR(MSC, msc);
832INPUT_DEV_CAP_ATTR(LED, led);
833INPUT_DEV_CAP_ATTR(SND, snd);
834INPUT_DEV_CAP_ATTR(FF, ff);
835INPUT_DEV_CAP_ATTR(SW, sw);
836
837static struct attribute *input_dev_caps_attrs[] = {
838 &class_device_attr_ev.attr,
839 &class_device_attr_key.attr,
840 &class_device_attr_rel.attr,
841 &class_device_attr_abs.attr,
842 &class_device_attr_msc.attr,
843 &class_device_attr_led.attr,
844 &class_device_attr_snd.attr,
845 &class_device_attr_ff.attr,
846 &class_device_attr_sw.attr,
847 NULL
848};
849
850static struct attribute_group input_dev_caps_attr_group = {
851 .name = "capabilities",
852 .attrs = input_dev_caps_attrs,
853};
854
cb9def4d
DT		 855static struct attribute_group *input_dev_attr_groups[] = {
856 &input_dev_attr_group,
857 &input_dev_id_attr_group,
858 &input_dev_caps_attr_group,
859 NULL
860};
861
d19fbe8a
DT		 862static void input_dev_release(struct class_device *class_dev)
863{
864 struct input_dev *dev = to_input_dev(class_dev);
865
509ca1a9 866 input_ff_destroy(dev);
d19fbe8a 867 kfree(dev);
509ca1a9 868
d19fbe8a
DT		 869 module_put(THIS_MODULE);
870}
871
a7fadbe1 872/*
312c004d 873 * Input uevent interface - loading event handlers based on
a7fadbe1
DT		 874 * device bitfields.
875 */
312c004d 876static int input_add_uevent_bm_var(char **envp, int num_envp, int *cur_index,
ac648a6a
DT		 877 char *buffer, int buffer_size, int *cur_len,
878 const char *name, unsigned long *bitmap, int max)
a7fadbe1
DT		 879{
880 if (*cur_index >= num_envp - 1)
881 return -ENOMEM;
882
883 envp[*cur_index] = buffer + *cur_len;
884
885 *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), name);
ac648a6a 886 if (*cur_len >= buffer_size)
a7fadbe1
DT		 887 return -ENOMEM;
888
889 *cur_len += input_print_bitmap(buffer + *cur_len,
890 max(buffer_size - *cur_len, 0),
2db66876 891 bitmap, max, 0) + 1;
a7fadbe1
DT		 892 if (*cur_len > buffer_size)
893 return -ENOMEM;
894
895 (*cur_index)++;
896 return 0;
897}
898
ac648a6a
DT		 899static int input_add_uevent_modalias_var(char **envp, int num_envp, int *cur_index,
900 char *buffer, int buffer_size, int *cur_len,
901 struct input_dev *dev)
902{
903 if (*cur_index >= num_envp - 1)
904 return -ENOMEM;
905
906 envp[*cur_index] = buffer + *cur_len;
907
908 *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0),
909 "MODALIAS=");
910 if (*cur_len >= buffer_size)
911 return -ENOMEM;
912
913 *cur_len += input_print_modalias(buffer + *cur_len,
914 max(buffer_size - *cur_len, 0),
915 dev, 0) + 1;
916 if (*cur_len > buffer_size)
917 return -ENOMEM;
918
919 (*cur_index)++;
920 return 0;
921}
922
a7fadbe1
DT		 923#define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \
924 do { \
ac648a6a 925 int err = add_uevent_var(envp, num_envp, &i, \
a7fadbe1
DT		 926 buffer, buffer_size, &len, \
927 fmt, val); \
928 if (err) \
929 return err; \
930 } while (0)
931
932#define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \
933 do { \
312c004d 934 int err = input_add_uevent_bm_var(envp, num_envp, &i, \
a7fadbe1
DT		 935 buffer, buffer_size, &len, \
936 name, bm, max); \
937 if (err) \
938 return err; \
939 } while (0)
940
ac648a6a
DT		 941#define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev) \
942 do { \
943 int err = input_add_uevent_modalias_var(envp, \
944 num_envp, &i, \
945 buffer, buffer_size, &len, \
946 dev); \
947 if (err) \
948 return err; \
949 } while (0)
950
312c004d
KS		 951static int input_dev_uevent(struct class_device *cdev, char **envp,
952 int num_envp, char *buffer, int buffer_size)
a7fadbe1
DT		 953{
954 struct input_dev *dev = to_input_dev(cdev);
955 int i = 0;
956 int len = 0;
957
958 INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x",
959 dev->id.bustype, dev->id.vendor,
960 dev->id.product, dev->id.version);
961 if (dev->name)
962 INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name);
963 if (dev->phys)
964 INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys);
08de1f04 965 if (dev->uniq)
a7fadbe1
DT		 966 INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq);
967
968 INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX);
969 if (test_bit(EV_KEY, dev->evbit))
970 INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX);
971 if (test_bit(EV_REL, dev->evbit))
972 INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX);
973 if (test_bit(EV_ABS, dev->evbit))
974 INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX);
975 if (test_bit(EV_MSC, dev->evbit))
976 INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX);
977 if (test_bit(EV_LED, dev->evbit))
978 INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX);
979 if (test_bit(EV_SND, dev->evbit))
980 INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX);
981 if (test_bit(EV_FF, dev->evbit))
982 INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX);
983 if (test_bit(EV_SW, dev->evbit))
984 INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX);
985
ac648a6a 986 INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev);
a7fadbe1 987
bd37e5a9 988 envp[i] = NULL;
a7fadbe1
DT		 989 return 0;
990}
991
ea9f240b
GKH		 992struct class input_class = {
993 .name = "input",
d19fbe8a 994 .release = input_dev_release,
312c004d 995 .uevent = input_dev_uevent,
d19fbe8a 996};
ca56fe07 997EXPORT_SYMBOL_GPL(input_class);
d19fbe8a 998
1447190e
DT		 999/**
1000 * input_allocate_device - allocate memory for new input device
1001 *
1002 * Returns prepared struct input_dev or NULL.
1003 *
1004 * NOTE: Use input_free_device() to free devices that have not been
1005 * registered; input_unregister_device() should be used for already
1006 * registered devices.
1007 */
d19fbe8a
DT		 1008struct input_dev *input_allocate_device(void)
1009{
1010 struct input_dev *dev;
1011
1012 dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL);
1013 if (dev) {
ea9f240b 1014 dev->cdev.class = &input_class;
cb9def4d 1015 dev->cdev.groups = input_dev_attr_groups;
d19fbe8a 1016 class_device_initialize(&dev->cdev);
f60d2b11 1017 mutex_init(&dev->mutex);
d19fbe8a
DT		 1018 INIT_LIST_HEAD(&dev->h_list);
1019 INIT_LIST_HEAD(&dev->node);
655816e4
DT		 1020
1021 __module_get(THIS_MODULE);
d19fbe8a
DT		 1022 }
1023
1024 return dev;
1025}
ca56fe07 1026EXPORT_SYMBOL(input_allocate_device);
d19fbe8a 1027
1447190e
DT		 1028/**
1029 * input_free_device - free memory occupied by input_dev structure
1030 * @dev: input device to free
1031 *
1032 * This function should only be used if input_register_device()
1033 * was not called yet or if it failed. Once device was registered
1034 * use input_unregister_device() and memory will be freed once last
1035 * refrence to the device is dropped.
1036 *
1037 * Device should be allocated by input_allocate_device().
1038 *
1039 * NOTE: If there are references to the input device then memory
1040 * will not be freed until last reference is dropped.
1041 */
f60d2b11
DT		 1042void input_free_device(struct input_dev *dev)
1043{
54f9e36c 1044 if (dev)
f60d2b11 1045 input_put_device(dev);
f60d2b11 1046}
ca56fe07 1047EXPORT_SYMBOL(input_free_device);
f60d2b11 1048
5f945489 1049int input_register_device(struct input_dev *dev)
1da177e4 1050{
bd0ef235 1051 static atomic_t input_no = ATOMIC_INIT(0);
1da177e4 1052 struct input_handler *handler;
bd0ef235
DT		 1053 const char *path;
1054 int error;
1da177e4 1055
5f945489 1056 set_bit(EV_SYN, dev->evbit);
0fbf87ca 1057
1da177e4
LT		 1058 /*
1059 * If delay and period are pre-set by the driver, then autorepeating
1060 * is handled by the driver itself and we don't do it in input.c.
1061 */
1062
1063 init_timer(&dev->timer);
1064 if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) {
1065 dev->timer.data = (long) dev;
1066 dev->timer.function = input_repeat_key;
1067 dev->rep[REP_DELAY] = 250;
1068 dev->rep[REP_PERIOD] = 33;
1069 }
1070
c8e4c772
MR		 1071 if (!dev->getkeycode)
1072 dev->getkeycode = input_default_getkeycode;
1073
1074 if (!dev->setkeycode)
1075 dev->setkeycode = input_default_setkeycode;
1076
1da177e4
LT		 1077 list_add_tail(&dev->node, &input_dev_list);
1078
bd0ef235
DT		 1079 snprintf(dev->cdev.class_id, sizeof(dev->cdev.class_id),
1080 "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1);
1081
88a447a0
DT		 1082 if (!dev->cdev.dev)
1083 dev->cdev.dev = dev->dev.parent;
1084
bd0ef235
DT		 1085 error = class_device_add(&dev->cdev);
1086 if (error)
1087 return error;
1088
bd0ef235
DT		 1089 path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL);
1090 printk(KERN_INFO "input: %s as %s\n",
1091 dev->name ? dev->name : "Unspecified device", path ? path : "N/A");
1092 kfree(path);
10204020 1093
1da177e4 1094 list_for_each_entry(handler, &input_handler_list, node)
5b2a0826 1095 input_attach_handler(dev, handler);
1da177e4 1096
f96b434d 1097 input_wakeup_procfs_readers();
5f945489
DT		 1098
1099 return 0;
1da177e4 1100}
ca56fe07 1101EXPORT_SYMBOL(input_register_device);
1da177e4
LT		 1102
1103void input_unregister_device(struct input_dev *dev)
1104{
5b2a0826 1105 struct input_handle *handle, *next;
6d2750c1 1106 int code;
1da177e4 1107
6d2750c1
DT		 1108 for (code = 0; code <= KEY_MAX; code++)
1109 if (test_bit(code, dev->key))
1110 input_report_key(dev, code, 0);
1111 input_sync(dev);
1da177e4
LT		 1112
1113 del_timer_sync(&dev->timer);
1114
5b2a0826 1115 list_for_each_entry_safe(handle, next, &dev->h_list, d_node)
1da177e4 1116 handle->handler->disconnect(handle);
5b2a0826 1117 WARN_ON(!list_empty(&dev->h_list));
1da177e4 1118
1da177e4
LT		 1119 list_del_init(&dev->node);
1120
e7374e48
DT		 1121 class_device_unregister(&dev->cdev);
1122
f96b434d 1123 input_wakeup_procfs_readers();
1da177e4 1124}
ca56fe07 1125EXPORT_SYMBOL(input_unregister_device);
1da177e4 1126
4263cf0f 1127int input_register_handler(struct input_handler *handler)
1da177e4
LT		 1128{
1129 struct input_dev *dev;
1da177e4 1130
1da177e4
LT		 1131 INIT_LIST_HEAD(&handler->h_list);
1132
4263cf0f
DT		 1133 if (handler->fops != NULL) {
1134 if (input_table[handler->minor >> 5])
1135 return -EBUSY;
1136
1da177e4 1137 input_table[handler->minor >> 5] = handler;
4263cf0f 1138 }
1da177e4
LT		 1139
1140 list_add_tail(&handler->node, &input_handler_list);
1141
1142 list_for_each_entry(dev, &input_dev_list, node)
5b2a0826 1143 input_attach_handler(dev, handler);
1da177e4 1144
f96b434d 1145 input_wakeup_procfs_readers();
4263cf0f 1146 return 0;
1da177e4 1147}
ca56fe07 1148EXPORT_SYMBOL(input_register_handler);
1da177e4
LT		 1149
1150void input_unregister_handler(struct input_handler *handler)
1151{
5b2a0826 1152 struct input_handle *handle, *next;
1da177e4 1153
5b2a0826 1154 list_for_each_entry_safe(handle, next, &handler->h_list, h_node)
1da177e4 1155 handler->disconnect(handle);
5b2a0826 1156 WARN_ON(!list_empty(&handler->h_list));
1da177e4
LT		 1157
1158 list_del_init(&handler->node);
1159
1160 if (handler->fops != NULL)
1161 input_table[handler->minor >> 5] = NULL;
1162
f96b434d 1163 input_wakeup_procfs_readers();
1da177e4 1164}
ca56fe07 1165EXPORT_SYMBOL(input_unregister_handler);
1da177e4 1166
5b2a0826
DT		 1167int input_register_handle(struct input_handle *handle)
1168{
1169 struct input_handler *handler = handle->handler;
1170
1171 list_add_tail(&handle->d_node, &handle->dev->h_list);
1172 list_add_tail(&handle->h_node, &handler->h_list);
1173
1174 if (handler->start)
1175 handler->start(handle);
1176
1177 return 0;
1178}
1179EXPORT_SYMBOL(input_register_handle);
1180
1181void input_unregister_handle(struct input_handle *handle)
1182{
1183 list_del_init(&handle->h_node);
1184 list_del_init(&handle->d_node);
1185}
1186EXPORT_SYMBOL(input_unregister_handle);
1187
1da177e4
LT		 1188static int input_open_file(struct inode *inode, struct file *file)
1189{
1190 struct input_handler *handler = input_table[iminor(inode) >> 5];
99ac48f5 1191 const struct file_operations *old_fops, *new_fops = NULL;
1da177e4
LT		 1192 int err;
1193
1194 /* No load-on-demand here? */
1195 if (!handler || !(new_fops = fops_get(handler->fops)))
1196 return -ENODEV;
1197
1198 /*
1199 * That's _really_ odd. Usually NULL ->open means "nothing special",
1200 * not "no device". Oh, well...
1201 */
1202 if (!new_fops->open) {
1203 fops_put(new_fops);
1204 return -ENODEV;
1205 }
1206 old_fops = file->f_op;
1207 file->f_op = new_fops;
1208
1209 err = new_fops->open(inode, file);
1210
1211 if (err) {
1212 fops_put(file->f_op);
1213 file->f_op = fops_get(old_fops);
1214 }
1215 fops_put(old_fops);
1216 return err;
1217}
1218
2b8693c0 1219static const struct file_operations input_fops = {
1da177e4
LT		 1220 .owner = THIS_MODULE,
1221 .open = input_open_file,
1222};
1223
f96b434d 1224static int __init input_init(void)
1da177e4 1225{
f96b434d 1226 int err;
1da177e4 1227
ea9f240b 1228 err = class_register(&input_class);
d19fbe8a
DT		 1229 if (err) {
1230 printk(KERN_ERR "input: unable to register input_dev class\n");
1231 return err;
1232 }
1233
f96b434d
DT		 1234 err = input_proc_init();
1235 if (err)
b0fdfebb 1236 goto fail1;
1da177e4 1237
f96b434d
DT		 1238 err = register_chrdev(INPUT_MAJOR, "input", &input_fops);
1239 if (err) {
1240 printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR);
b0fdfebb 1241 goto fail2;
1da177e4 1242 }
e334016f 1243
1da177e4 1244 return 0;
1da177e4 1245
b0fdfebb 1246 fail2: input_proc_exit();
ea9f240b 1247 fail1: class_unregister(&input_class);
f96b434d 1248 return err;
1da177e4
LT		 1249}
1250
1251static void __exit input_exit(void)
1252{
f96b434d 1253 input_proc_exit();
1da177e4 1254 unregister_chrdev(INPUT_MAJOR, "input");
ea9f240b 1255 class_unregister(&input_class);
1da177e4
LT		 1256}
1257
1258subsys_initcall(input_init);
1259module_exit(input_exit);
Linux kernel - Deliverables
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