hwmon: Convert from class_device to device
[linux-2.6] / drivers / input / input.c
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/input.h>
15 #include <linux/module.h>
16 #include <linux/random.h>
17 #include <linux/major.h>
18 #include <linux/proc_fs.h>
19 #include <linux/seq_file.h>
20 #include <linux/interrupt.h>
21 #include <linux/poll.h>
22 #include <linux/device.h>
23 #include <linux/mutex.h>
24
25 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
26 MODULE_DESCRIPTION("Input core");
27 MODULE_LICENSE("GPL");
28
29 #define INPUT_DEVICES   256
30
31 static LIST_HEAD(input_dev_list);
32 static LIST_HEAD(input_handler_list);
33
34 static struct input_handler *input_table[8];
35
36 /**
37  * input_event() - report new input event
38  * @dev: device that generated the event
39  * @type: type of the event
40  * @code: event code
41  * @value: value of the event
42  *
43  * This function should be used by drivers implementing various input devices
44  * See also input_inject_event()
45  */
46 void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
47 {
48         struct input_handle *handle;
49
50         if (type > EV_MAX || !test_bit(type, dev->evbit))
51                 return;
52
53         add_input_randomness(type, code, value);
54
55         switch (type) {
56
57                 case EV_SYN:
58                         switch (code) {
59                                 case SYN_CONFIG:
60                                         if (dev->event)
61                                                 dev->event(dev, type, code, value);
62                                         break;
63
64                                 case SYN_REPORT:
65                                         if (dev->sync)
66                                                 return;
67                                         dev->sync = 1;
68                                         break;
69                         }
70                         break;
71
72                 case EV_KEY:
73
74                         if (code > KEY_MAX || !test_bit(code, dev->keybit) || !!test_bit(code, dev->key) == value)
75                                 return;
76
77                         if (value == 2)
78                                 break;
79
80                         change_bit(code, dev->key);
81
82                         if (test_bit(EV_REP, dev->evbit) && dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && dev->timer.data && value) {
83                                 dev->repeat_key = code;
84                                 mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_DELAY]));
85                         }
86
87                         break;
88
89                 case EV_SW:
90
91                         if (code > SW_MAX || !test_bit(code, dev->swbit) || !!test_bit(code, dev->sw) == value)
92                                 return;
93
94                         change_bit(code, dev->sw);
95
96                         break;
97
98                 case EV_ABS:
99
100                         if (code > ABS_MAX || !test_bit(code, dev->absbit))
101                                 return;
102
103                         if (dev->absfuzz[code]) {
104                                 if ((value > dev->abs[code] - (dev->absfuzz[code] >> 1)) &&
105                                     (value < dev->abs[code] + (dev->absfuzz[code] >> 1)))
106                                         return;
107
108                                 if ((value > dev->abs[code] - dev->absfuzz[code]) &&
109                                     (value < dev->abs[code] + dev->absfuzz[code]))
110                                         value = (dev->abs[code] * 3 + value) >> 2;
111
112                                 if ((value > dev->abs[code] - (dev->absfuzz[code] << 1)) &&
113                                     (value < dev->abs[code] + (dev->absfuzz[code] << 1)))
114                                         value = (dev->abs[code] + value) >> 1;
115                         }
116
117                         if (dev->abs[code] == value)
118                                 return;
119
120                         dev->abs[code] = value;
121                         break;
122
123                 case EV_REL:
124
125                         if (code > REL_MAX || !test_bit(code, dev->relbit) || (value == 0))
126                                 return;
127
128                         break;
129
130                 case EV_MSC:
131
132                         if (code > MSC_MAX || !test_bit(code, dev->mscbit))
133                                 return;
134
135                         if (dev->event)
136                                 dev->event(dev, type, code, value);
137
138                         break;
139
140                 case EV_LED:
141
142                         if (code > LED_MAX || !test_bit(code, dev->ledbit) || !!test_bit(code, dev->led) == value)
143                                 return;
144
145                         change_bit(code, dev->led);
146
147                         if (dev->event)
148                                 dev->event(dev, type, code, value);
149
150                         break;
151
152                 case EV_SND:
153
154                         if (code > SND_MAX || !test_bit(code, dev->sndbit))
155                                 return;
156
157                         if (!!test_bit(code, dev->snd) != !!value)
158                                 change_bit(code, dev->snd);
159
160                         if (dev->event)
161                                 dev->event(dev, type, code, value);
162
163                         break;
164
165                 case EV_REP:
166
167                         if (code > REP_MAX || value < 0 || dev->rep[code] == value)
168                                 return;
169
170                         dev->rep[code] = value;
171                         if (dev->event)
172                                 dev->event(dev, type, code, value);
173
174                         break;
175
176                 case EV_FF:
177
178                         if (value < 0)
179                                 return;
180
181                         if (dev->event)
182                                 dev->event(dev, type, code, value);
183                         break;
184         }
185
186         if (type != EV_SYN)
187                 dev->sync = 0;
188
189         if (dev->grab)
190                 dev->grab->handler->event(dev->grab, type, code, value);
191         else
192                 list_for_each_entry(handle, &dev->h_list, d_node)
193                         if (handle->open)
194                                 handle->handler->event(handle, type, code, value);
195 }
196 EXPORT_SYMBOL(input_event);
197
198 /**
199  * input_inject_event() - send input event from input handler
200  * @handle: input handle to send event through
201  * @type: type of the event
202  * @code: event code
203  * @value: value of the event
204  *
205  * Similar to input_event() but will ignore event if device is "grabbed" and handle
206  * injecting event is not the one that owns the device.
207  */
208 void input_inject_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
209 {
210         if (!handle->dev->grab || handle->dev->grab == handle)
211                 input_event(handle->dev, type, code, value);
212 }
213 EXPORT_SYMBOL(input_inject_event);
214
215 static void input_repeat_key(unsigned long data)
216 {
217         struct input_dev *dev = (void *) data;
218
219         if (!test_bit(dev->repeat_key, dev->key))
220                 return;
221
222         input_event(dev, EV_KEY, dev->repeat_key, 2);
223         input_sync(dev);
224
225         if (dev->rep[REP_PERIOD])
226                 mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_PERIOD]));
227 }
228
229 int input_grab_device(struct input_handle *handle)
230 {
231         if (handle->dev->grab)
232                 return -EBUSY;
233
234         handle->dev->grab = handle;
235         return 0;
236 }
237 EXPORT_SYMBOL(input_grab_device);
238
239 void input_release_device(struct input_handle *handle)
240 {
241         struct input_dev *dev = handle->dev;
242
243         if (dev->grab == handle) {
244                 dev->grab = NULL;
245
246                 list_for_each_entry(handle, &dev->h_list, d_node)
247                         if (handle->handler->start)
248                                 handle->handler->start(handle);
249         }
250 }
251 EXPORT_SYMBOL(input_release_device);
252
253 int input_open_device(struct input_handle *handle)
254 {
255         struct input_dev *dev = handle->dev;
256         int err;
257
258         err = mutex_lock_interruptible(&dev->mutex);
259         if (err)
260                 return err;
261
262         handle->open++;
263
264         if (!dev->users++ && dev->open)
265                 err = dev->open(dev);
266
267         if (err)
268                 handle->open--;
269
270         mutex_unlock(&dev->mutex);
271
272         return err;
273 }
274 EXPORT_SYMBOL(input_open_device);
275
276 int input_flush_device(struct input_handle* handle, struct file* file)
277 {
278         if (handle->dev->flush)
279                 return handle->dev->flush(handle->dev, file);
280
281         return 0;
282 }
283 EXPORT_SYMBOL(input_flush_device);
284
285 void input_close_device(struct input_handle *handle)
286 {
287         struct input_dev *dev = handle->dev;
288
289         input_release_device(handle);
290
291         mutex_lock(&dev->mutex);
292
293         if (!--dev->users && dev->close)
294                 dev->close(dev);
295         handle->open--;
296
297         mutex_unlock(&dev->mutex);
298 }
299 EXPORT_SYMBOL(input_close_device);
300
301 static int input_fetch_keycode(struct input_dev *dev, int scancode)
302 {
303         switch (dev->keycodesize) {
304                 case 1:
305                         return ((u8 *)dev->keycode)[scancode];
306
307                 case 2:
308                         return ((u16 *)dev->keycode)[scancode];
309
310                 default:
311                         return ((u32 *)dev->keycode)[scancode];
312         }
313 }
314
315 static int input_default_getkeycode(struct input_dev *dev,
316                                     int scancode, int *keycode)
317 {
318         if (!dev->keycodesize)
319                 return -EINVAL;
320
321         if (scancode < 0 || scancode >= dev->keycodemax)
322                 return -EINVAL;
323
324         *keycode = input_fetch_keycode(dev, scancode);
325
326         return 0;
327 }
328
329 static int input_default_setkeycode(struct input_dev *dev,
330                                     int scancode, int keycode)
331 {
332         int old_keycode;
333         int i;
334
335         if (scancode < 0 || scancode >= dev->keycodemax)
336                 return -EINVAL;
337
338         if (keycode < 0 || keycode > KEY_MAX)
339                 return -EINVAL;
340
341         if (!dev->keycodesize)
342                 return -EINVAL;
343
344         if (dev->keycodesize < sizeof(keycode) && (keycode >> (dev->keycodesize * 8)))
345                 return -EINVAL;
346
347         switch (dev->keycodesize) {
348                 case 1: {
349                         u8 *k = (u8 *)dev->keycode;
350                         old_keycode = k[scancode];
351                         k[scancode] = keycode;
352                         break;
353                 }
354                 case 2: {
355                         u16 *k = (u16 *)dev->keycode;
356                         old_keycode = k[scancode];
357                         k[scancode] = keycode;
358                         break;
359                 }
360                 default: {
361                         u32 *k = (u32 *)dev->keycode;
362                         old_keycode = k[scancode];
363                         k[scancode] = keycode;
364                         break;
365                 }
366         }
367
368         clear_bit(old_keycode, dev->keybit);
369         set_bit(keycode, dev->keybit);
370
371         for (i = 0; i < dev->keycodemax; i++) {
372                 if (input_fetch_keycode(dev, i) == old_keycode) {
373                         set_bit(old_keycode, dev->keybit);
374                         break; /* Setting the bit twice is useless, so break */
375                 }
376         }
377
378         return 0;
379 }
380
381
382 #define MATCH_BIT(bit, max) \
383                 for (i = 0; i < NBITS(max); i++) \
384                         if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \
385                                 break; \
386                 if (i != NBITS(max)) \
387                         continue;
388
389 static const struct input_device_id *input_match_device(const struct input_device_id *id,
390                                                         struct input_dev *dev)
391 {
392         int i;
393
394         for (; id->flags || id->driver_info; id++) {
395
396                 if (id->flags & INPUT_DEVICE_ID_MATCH_BUS)
397                         if (id->bustype != dev->id.bustype)
398                                 continue;
399
400                 if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR)
401                         if (id->vendor != dev->id.vendor)
402                                 continue;
403
404                 if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT)
405                         if (id->product != dev->id.product)
406                                 continue;
407
408                 if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION)
409                         if (id->version != dev->id.version)
410                                 continue;
411
412                 MATCH_BIT(evbit,  EV_MAX);
413                 MATCH_BIT(keybit, KEY_MAX);
414                 MATCH_BIT(relbit, REL_MAX);
415                 MATCH_BIT(absbit, ABS_MAX);
416                 MATCH_BIT(mscbit, MSC_MAX);
417                 MATCH_BIT(ledbit, LED_MAX);
418                 MATCH_BIT(sndbit, SND_MAX);
419                 MATCH_BIT(ffbit,  FF_MAX);
420                 MATCH_BIT(swbit,  SW_MAX);
421
422                 return id;
423         }
424
425         return NULL;
426 }
427
428 static int input_attach_handler(struct input_dev *dev, struct input_handler *handler)
429 {
430         const struct input_device_id *id;
431         int error;
432
433         if (handler->blacklist && input_match_device(handler->blacklist, dev))
434                 return -ENODEV;
435
436         id = input_match_device(handler->id_table, dev);
437         if (!id)
438                 return -ENODEV;
439
440         error = handler->connect(handler, dev, id);
441         if (error && error != -ENODEV)
442                 printk(KERN_ERR
443                         "input: failed to attach handler %s to device %s, "
444                         "error: %d\n",
445                         handler->name, kobject_name(&dev->dev.kobj), error);
446
447         return error;
448 }
449
450
451 #ifdef CONFIG_PROC_FS
452
453 static struct proc_dir_entry *proc_bus_input_dir;
454 static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait);
455 static int input_devices_state;
456
457 static inline void input_wakeup_procfs_readers(void)
458 {
459         input_devices_state++;
460         wake_up(&input_devices_poll_wait);
461 }
462
463 static unsigned int input_proc_devices_poll(struct file *file, poll_table *wait)
464 {
465         int state = input_devices_state;
466
467         poll_wait(file, &input_devices_poll_wait, wait);
468         if (state != input_devices_state)
469                 return POLLIN | POLLRDNORM;
470
471         return 0;
472 }
473
474 static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos)
475 {
476         /* acquire lock here ... Yes, we do need locking, I knowi, I know... */
477
478         return seq_list_start(&input_dev_list, *pos);
479 }
480
481 static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos)
482 {
483         return seq_list_next(v, &input_dev_list, pos);
484 }
485
486 static void input_devices_seq_stop(struct seq_file *seq, void *v)
487 {
488         /* release lock here */
489 }
490
491 static void input_seq_print_bitmap(struct seq_file *seq, const char *name,
492                                    unsigned long *bitmap, int max)
493 {
494         int i;
495
496         for (i = NBITS(max) - 1; i > 0; i--)
497                 if (bitmap[i])
498                         break;
499
500         seq_printf(seq, "B: %s=", name);
501         for (; i >= 0; i--)
502                 seq_printf(seq, "%lx%s", bitmap[i], i > 0 ? " " : "");
503         seq_putc(seq, '\n');
504 }
505
506 static int input_devices_seq_show(struct seq_file *seq, void *v)
507 {
508         struct input_dev *dev = container_of(v, struct input_dev, node);
509         const char *path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL);
510         struct input_handle *handle;
511
512         seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n",
513                    dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version);
514
515         seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : "");
516         seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : "");
517         seq_printf(seq, "S: Sysfs=%s\n", path ? path : "");
518         seq_printf(seq, "U: Uniq=%s\n", dev->uniq ? dev->uniq : "");
519         seq_printf(seq, "H: Handlers=");
520
521         list_for_each_entry(handle, &dev->h_list, d_node)
522                 seq_printf(seq, "%s ", handle->name);
523         seq_putc(seq, '\n');
524
525         input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX);
526         if (test_bit(EV_KEY, dev->evbit))
527                 input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX);
528         if (test_bit(EV_REL, dev->evbit))
529                 input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX);
530         if (test_bit(EV_ABS, dev->evbit))
531                 input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX);
532         if (test_bit(EV_MSC, dev->evbit))
533                 input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX);
534         if (test_bit(EV_LED, dev->evbit))
535                 input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX);
536         if (test_bit(EV_SND, dev->evbit))
537                 input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX);
538         if (test_bit(EV_FF, dev->evbit))
539                 input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX);
540         if (test_bit(EV_SW, dev->evbit))
541                 input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX);
542
543         seq_putc(seq, '\n');
544
545         kfree(path);
546         return 0;
547 }
548
549 static struct seq_operations input_devices_seq_ops = {
550         .start  = input_devices_seq_start,
551         .next   = input_devices_seq_next,
552         .stop   = input_devices_seq_stop,
553         .show   = input_devices_seq_show,
554 };
555
556 static int input_proc_devices_open(struct inode *inode, struct file *file)
557 {
558         return seq_open(file, &input_devices_seq_ops);
559 }
560
561 static const struct file_operations input_devices_fileops = {
562         .owner          = THIS_MODULE,
563         .open           = input_proc_devices_open,
564         .poll           = input_proc_devices_poll,
565         .read           = seq_read,
566         .llseek         = seq_lseek,
567         .release        = seq_release,
568 };
569
570 static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos)
571 {
572         /* acquire lock here ... Yes, we do need locking, I knowi, I know... */
573         seq->private = (void *)(unsigned long)*pos;
574         return seq_list_start(&input_handler_list, *pos);
575 }
576
577 static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos)
578 {
579         seq->private = (void *)(unsigned long)(*pos + 1);
580         return seq_list_next(v, &input_handler_list, pos);
581 }
582
583 static void input_handlers_seq_stop(struct seq_file *seq, void *v)
584 {
585         /* release lock here */
586 }
587
588 static int input_handlers_seq_show(struct seq_file *seq, void *v)
589 {
590         struct input_handler *handler = container_of(v, struct input_handler, node);
591
592         seq_printf(seq, "N: Number=%ld Name=%s",
593                    (unsigned long)seq->private, handler->name);
594         if (handler->fops)
595                 seq_printf(seq, " Minor=%d", handler->minor);
596         seq_putc(seq, '\n');
597
598         return 0;
599 }
600 static struct seq_operations input_handlers_seq_ops = {
601         .start  = input_handlers_seq_start,
602         .next   = input_handlers_seq_next,
603         .stop   = input_handlers_seq_stop,
604         .show   = input_handlers_seq_show,
605 };
606
607 static int input_proc_handlers_open(struct inode *inode, struct file *file)
608 {
609         return seq_open(file, &input_handlers_seq_ops);
610 }
611
612 static const struct file_operations input_handlers_fileops = {
613         .owner          = THIS_MODULE,
614         .open           = input_proc_handlers_open,
615         .read           = seq_read,
616         .llseek         = seq_lseek,
617         .release        = seq_release,
618 };
619
620 static int __init input_proc_init(void)
621 {
622         struct proc_dir_entry *entry;
623
624         proc_bus_input_dir = proc_mkdir("input", proc_bus);
625         if (!proc_bus_input_dir)
626                 return -ENOMEM;
627
628         proc_bus_input_dir->owner = THIS_MODULE;
629
630         entry = create_proc_entry("devices", 0, proc_bus_input_dir);
631         if (!entry)
632                 goto fail1;
633
634         entry->owner = THIS_MODULE;
635         entry->proc_fops = &input_devices_fileops;
636
637         entry = create_proc_entry("handlers", 0, proc_bus_input_dir);
638         if (!entry)
639                 goto fail2;
640
641         entry->owner = THIS_MODULE;
642         entry->proc_fops = &input_handlers_fileops;
643
644         return 0;
645
646  fail2: remove_proc_entry("devices", proc_bus_input_dir);
647  fail1: remove_proc_entry("input", proc_bus);
648         return -ENOMEM;
649 }
650
651 static void input_proc_exit(void)
652 {
653         remove_proc_entry("devices", proc_bus_input_dir);
654         remove_proc_entry("handlers", proc_bus_input_dir);
655         remove_proc_entry("input", proc_bus);
656 }
657
658 #else /* !CONFIG_PROC_FS */
659 static inline void input_wakeup_procfs_readers(void) { }
660 static inline int input_proc_init(void) { return 0; }
661 static inline void input_proc_exit(void) { }
662 #endif
663
664 #define INPUT_DEV_STRING_ATTR_SHOW(name)                                \
665 static ssize_t input_dev_show_##name(struct device *dev,                \
666                                      struct device_attribute *attr,     \
667                                      char *buf)                         \
668 {                                                                       \
669         struct input_dev *input_dev = to_input_dev(dev);                \
670                                                                         \
671         return scnprintf(buf, PAGE_SIZE, "%s\n",                        \
672                          input_dev->name ? input_dev->name : "");       \
673 }                                                                       \
674 static DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL)
675
676 INPUT_DEV_STRING_ATTR_SHOW(name);
677 INPUT_DEV_STRING_ATTR_SHOW(phys);
678 INPUT_DEV_STRING_ATTR_SHOW(uniq);
679
680 static int input_print_modalias_bits(char *buf, int size,
681                                      char name, unsigned long *bm,
682                                      unsigned int min_bit, unsigned int max_bit)
683 {
684         int len = 0, i;
685
686         len += snprintf(buf, max(size, 0), "%c", name);
687         for (i = min_bit; i < max_bit; i++)
688                 if (bm[LONG(i)] & BIT(i))
689                         len += snprintf(buf + len, max(size - len, 0), "%X,", i);
690         return len;
691 }
692
693 static int input_print_modalias(char *buf, int size, struct input_dev *id,
694                                 int add_cr)
695 {
696         int len;
697
698         len = snprintf(buf, max(size, 0),
699                        "input:b%04Xv%04Xp%04Xe%04X-",
700                        id->id.bustype, id->id.vendor,
701                        id->id.product, id->id.version);
702
703         len += input_print_modalias_bits(buf + len, size - len,
704                                 'e', id->evbit, 0, EV_MAX);
705         len += input_print_modalias_bits(buf + len, size - len,
706                                 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX);
707         len += input_print_modalias_bits(buf + len, size - len,
708                                 'r', id->relbit, 0, REL_MAX);
709         len += input_print_modalias_bits(buf + len, size - len,
710                                 'a', id->absbit, 0, ABS_MAX);
711         len += input_print_modalias_bits(buf + len, size - len,
712                                 'm', id->mscbit, 0, MSC_MAX);
713         len += input_print_modalias_bits(buf + len, size - len,
714                                 'l', id->ledbit, 0, LED_MAX);
715         len += input_print_modalias_bits(buf + len, size - len,
716                                 's', id->sndbit, 0, SND_MAX);
717         len += input_print_modalias_bits(buf + len, size - len,
718                                 'f', id->ffbit, 0, FF_MAX);
719         len += input_print_modalias_bits(buf + len, size - len,
720                                 'w', id->swbit, 0, SW_MAX);
721
722         if (add_cr)
723                 len += snprintf(buf + len, max(size - len, 0), "\n");
724
725         return len;
726 }
727
728 static ssize_t input_dev_show_modalias(struct device *dev,
729                                        struct device_attribute *attr,
730                                        char *buf)
731 {
732         struct input_dev *id = to_input_dev(dev);
733         ssize_t len;
734
735         len = input_print_modalias(buf, PAGE_SIZE, id, 1);
736
737         return min_t(int, len, PAGE_SIZE);
738 }
739 static DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL);
740
741 static struct attribute *input_dev_attrs[] = {
742         &dev_attr_name.attr,
743         &dev_attr_phys.attr,
744         &dev_attr_uniq.attr,
745         &dev_attr_modalias.attr,
746         NULL
747 };
748
749 static struct attribute_group input_dev_attr_group = {
750         .attrs  = input_dev_attrs,
751 };
752
753 #define INPUT_DEV_ID_ATTR(name)                                         \
754 static ssize_t input_dev_show_id_##name(struct device *dev,             \
755                                         struct device_attribute *attr,  \
756                                         char *buf)                      \
757 {                                                                       \
758         struct input_dev *input_dev = to_input_dev(dev);                \
759         return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \
760 }                                                                       \
761 static DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL)
762
763 INPUT_DEV_ID_ATTR(bustype);
764 INPUT_DEV_ID_ATTR(vendor);
765 INPUT_DEV_ID_ATTR(product);
766 INPUT_DEV_ID_ATTR(version);
767
768 static struct attribute *input_dev_id_attrs[] = {
769         &dev_attr_bustype.attr,
770         &dev_attr_vendor.attr,
771         &dev_attr_product.attr,
772         &dev_attr_version.attr,
773         NULL
774 };
775
776 static struct attribute_group input_dev_id_attr_group = {
777         .name   = "id",
778         .attrs  = input_dev_id_attrs,
779 };
780
781 static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap,
782                               int max, int add_cr)
783 {
784         int i;
785         int len = 0;
786
787         for (i = NBITS(max) - 1; i > 0; i--)
788                 if (bitmap[i])
789                         break;
790
791         for (; i >= 0; i--)
792                 len += snprintf(buf + len, max(buf_size - len, 0),
793                                 "%lx%s", bitmap[i], i > 0 ? " " : "");
794
795         if (add_cr)
796                 len += snprintf(buf + len, max(buf_size - len, 0), "\n");
797
798         return len;
799 }
800
801 #define INPUT_DEV_CAP_ATTR(ev, bm)                                      \
802 static ssize_t input_dev_show_cap_##bm(struct device *dev,              \
803                                        struct device_attribute *attr,   \
804                                        char *buf)                       \
805 {                                                                       \
806         struct input_dev *input_dev = to_input_dev(dev);                \
807         int len = input_print_bitmap(buf, PAGE_SIZE,                    \
808                                      input_dev->bm##bit, ev##_MAX, 1);  \
809         return min_t(int, len, PAGE_SIZE);                              \
810 }                                                                       \
811 static DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL)
812
813 INPUT_DEV_CAP_ATTR(EV, ev);
814 INPUT_DEV_CAP_ATTR(KEY, key);
815 INPUT_DEV_CAP_ATTR(REL, rel);
816 INPUT_DEV_CAP_ATTR(ABS, abs);
817 INPUT_DEV_CAP_ATTR(MSC, msc);
818 INPUT_DEV_CAP_ATTR(LED, led);
819 INPUT_DEV_CAP_ATTR(SND, snd);
820 INPUT_DEV_CAP_ATTR(FF, ff);
821 INPUT_DEV_CAP_ATTR(SW, sw);
822
823 static struct attribute *input_dev_caps_attrs[] = {
824         &dev_attr_ev.attr,
825         &dev_attr_key.attr,
826         &dev_attr_rel.attr,
827         &dev_attr_abs.attr,
828         &dev_attr_msc.attr,
829         &dev_attr_led.attr,
830         &dev_attr_snd.attr,
831         &dev_attr_ff.attr,
832         &dev_attr_sw.attr,
833         NULL
834 };
835
836 static struct attribute_group input_dev_caps_attr_group = {
837         .name   = "capabilities",
838         .attrs  = input_dev_caps_attrs,
839 };
840
841 static struct attribute_group *input_dev_attr_groups[] = {
842         &input_dev_attr_group,
843         &input_dev_id_attr_group,
844         &input_dev_caps_attr_group,
845         NULL
846 };
847
848 static void input_dev_release(struct device *device)
849 {
850         struct input_dev *dev = to_input_dev(device);
851
852         input_ff_destroy(dev);
853         kfree(dev);
854
855         module_put(THIS_MODULE);
856 }
857
858 /*
859  * Input uevent interface - loading event handlers based on
860  * device bitfields.
861  */
862 static int input_add_uevent_bm_var(char **envp, int num_envp, int *cur_index,
863                                    char *buffer, int buffer_size, int *cur_len,
864                                    const char *name, unsigned long *bitmap, int max)
865 {
866         if (*cur_index >= num_envp - 1)
867                 return -ENOMEM;
868
869         envp[*cur_index] = buffer + *cur_len;
870
871         *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), name);
872         if (*cur_len >= buffer_size)
873                 return -ENOMEM;
874
875         *cur_len += input_print_bitmap(buffer + *cur_len,
876                                         max(buffer_size - *cur_len, 0),
877                                         bitmap, max, 0) + 1;
878         if (*cur_len > buffer_size)
879                 return -ENOMEM;
880
881         (*cur_index)++;
882         return 0;
883 }
884
885 static int input_add_uevent_modalias_var(char **envp, int num_envp, int *cur_index,
886                                          char *buffer, int buffer_size, int *cur_len,
887                                          struct input_dev *dev)
888 {
889         if (*cur_index >= num_envp - 1)
890                 return -ENOMEM;
891
892         envp[*cur_index] = buffer + *cur_len;
893
894         *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0),
895                              "MODALIAS=");
896         if (*cur_len >= buffer_size)
897                 return -ENOMEM;
898
899         *cur_len += input_print_modalias(buffer + *cur_len,
900                                          max(buffer_size - *cur_len, 0),
901                                          dev, 0) + 1;
902         if (*cur_len > buffer_size)
903                 return -ENOMEM;
904
905         (*cur_index)++;
906         return 0;
907 }
908
909 #define INPUT_ADD_HOTPLUG_VAR(fmt, val...)                              \
910         do {                                                            \
911                 int err = add_uevent_var(envp, num_envp, &i,            \
912                                         buffer, buffer_size, &len,      \
913                                         fmt, val);                      \
914                 if (err)                                                \
915                         return err;                                     \
916         } while (0)
917
918 #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max)                         \
919         do {                                                            \
920                 int err = input_add_uevent_bm_var(envp, num_envp, &i,   \
921                                         buffer, buffer_size, &len,      \
922                                         name, bm, max);                 \
923                 if (err)                                                \
924                         return err;                                     \
925         } while (0)
926
927 #define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev)                             \
928         do {                                                            \
929                 int err = input_add_uevent_modalias_var(envp,           \
930                                         num_envp, &i,                   \
931                                         buffer, buffer_size, &len,      \
932                                         dev);                           \
933                 if (err)                                                \
934                         return err;                                     \
935         } while (0)
936
937 static int input_dev_uevent(struct device *device, char **envp,
938                             int num_envp, char *buffer, int buffer_size)
939 {
940         struct input_dev *dev = to_input_dev(device);
941         int i = 0;
942         int len = 0;
943
944         INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x",
945                                 dev->id.bustype, dev->id.vendor,
946                                 dev->id.product, dev->id.version);
947         if (dev->name)
948                 INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name);
949         if (dev->phys)
950                 INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys);
951         if (dev->uniq)
952                 INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq);
953
954         INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX);
955         if (test_bit(EV_KEY, dev->evbit))
956                 INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX);
957         if (test_bit(EV_REL, dev->evbit))
958                 INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX);
959         if (test_bit(EV_ABS, dev->evbit))
960                 INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX);
961         if (test_bit(EV_MSC, dev->evbit))
962                 INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX);
963         if (test_bit(EV_LED, dev->evbit))
964                 INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX);
965         if (test_bit(EV_SND, dev->evbit))
966                 INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX);
967         if (test_bit(EV_FF, dev->evbit))
968                 INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX);
969         if (test_bit(EV_SW, dev->evbit))
970                 INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX);
971
972         INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev);
973
974         envp[i] = NULL;
975         return 0;
976 }
977
978 static struct device_type input_dev_type = {
979         .groups         = input_dev_attr_groups,
980         .release        = input_dev_release,
981         .uevent         = input_dev_uevent,
982 };
983
984 struct class input_class = {
985         .name           = "input",
986 };
987 EXPORT_SYMBOL_GPL(input_class);
988
989 /**
990  * input_allocate_device - allocate memory for new input device
991  *
992  * Returns prepared struct input_dev or NULL.
993  *
994  * NOTE: Use input_free_device() to free devices that have not been
995  * registered; input_unregister_device() should be used for already
996  * registered devices.
997  */
998 struct input_dev *input_allocate_device(void)
999 {
1000         struct input_dev *dev;
1001
1002         dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL);
1003         if (dev) {
1004                 dev->dev.type = &input_dev_type;
1005                 dev->dev.class = &input_class;
1006                 device_initialize(&dev->dev);
1007                 mutex_init(&dev->mutex);
1008                 INIT_LIST_HEAD(&dev->h_list);
1009                 INIT_LIST_HEAD(&dev->node);
1010
1011                 __module_get(THIS_MODULE);
1012         }
1013
1014         return dev;
1015 }
1016 EXPORT_SYMBOL(input_allocate_device);
1017
1018 /**
1019  * input_free_device - free memory occupied by input_dev structure
1020  * @dev: input device to free
1021  *
1022  * This function should only be used if input_register_device()
1023  * was not called yet or if it failed. Once device was registered
1024  * use input_unregister_device() and memory will be freed once last
1025  * refrence to the device is dropped.
1026  *
1027  * Device should be allocated by input_allocate_device().
1028  *
1029  * NOTE: If there are references to the input device then memory
1030  * will not be freed until last reference is dropped.
1031  */
1032 void input_free_device(struct input_dev *dev)
1033 {
1034         if (dev)
1035                 input_put_device(dev);
1036 }
1037 EXPORT_SYMBOL(input_free_device);
1038
1039 /**
1040  * input_set_capability - mark device as capable of a certain event
1041  * @dev: device that is capable of emitting or accepting event
1042  * @type: type of the event (EV_KEY, EV_REL, etc...)
1043  * @code: event code
1044  *
1045  * In addition to setting up corresponding bit in appropriate capability
1046  * bitmap the function also adjusts dev->evbit.
1047  */
1048 void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code)
1049 {
1050         switch (type) {
1051         case EV_KEY:
1052                 __set_bit(code, dev->keybit);
1053                 break;
1054
1055         case EV_REL:
1056                 __set_bit(code, dev->relbit);
1057                 break;
1058
1059         case EV_ABS:
1060                 __set_bit(code, dev->absbit);
1061                 break;
1062
1063         case EV_MSC:
1064                 __set_bit(code, dev->mscbit);
1065                 break;
1066
1067         case EV_SW:
1068                 __set_bit(code, dev->swbit);
1069                 break;
1070
1071         case EV_LED:
1072                 __set_bit(code, dev->ledbit);
1073                 break;
1074
1075         case EV_SND:
1076                 __set_bit(code, dev->sndbit);
1077                 break;
1078
1079         case EV_FF:
1080                 __set_bit(code, dev->ffbit);
1081                 break;
1082
1083         default:
1084                 printk(KERN_ERR
1085                         "input_set_capability: unknown type %u (code %u)\n",
1086                         type, code);
1087                 dump_stack();
1088                 return;
1089         }
1090
1091         __set_bit(type, dev->evbit);
1092 }
1093 EXPORT_SYMBOL(input_set_capability);
1094
1095 int input_register_device(struct input_dev *dev)
1096 {
1097         static atomic_t input_no = ATOMIC_INIT(0);
1098         struct input_handler *handler;
1099         const char *path;
1100         int error;
1101
1102         set_bit(EV_SYN, dev->evbit);
1103
1104         /*
1105          * If delay and period are pre-set by the driver, then autorepeating
1106          * is handled by the driver itself and we don't do it in input.c.
1107          */
1108
1109         init_timer(&dev->timer);
1110         if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) {
1111                 dev->timer.data = (long) dev;
1112                 dev->timer.function = input_repeat_key;
1113                 dev->rep[REP_DELAY] = 250;
1114                 dev->rep[REP_PERIOD] = 33;
1115         }
1116
1117         if (!dev->getkeycode)
1118                 dev->getkeycode = input_default_getkeycode;
1119
1120         if (!dev->setkeycode)
1121                 dev->setkeycode = input_default_setkeycode;
1122
1123         list_add_tail(&dev->node, &input_dev_list);
1124
1125         snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id),
1126                  "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1);
1127
1128         if (dev->cdev.dev)
1129                 dev->dev.parent = dev->cdev.dev;
1130
1131         error = device_add(&dev->dev);
1132         if (error)
1133                 return error;
1134
1135         path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL);
1136         printk(KERN_INFO "input: %s as %s\n",
1137                 dev->name ? dev->name : "Unspecified device", path ? path : "N/A");
1138         kfree(path);
1139
1140         list_for_each_entry(handler, &input_handler_list, node)
1141                 input_attach_handler(dev, handler);
1142
1143         input_wakeup_procfs_readers();
1144
1145         return 0;
1146 }
1147 EXPORT_SYMBOL(input_register_device);
1148
1149 void input_unregister_device(struct input_dev *dev)
1150 {
1151         struct input_handle *handle, *next;
1152         int code;
1153
1154         for (code = 0; code <= KEY_MAX; code++)
1155                 if (test_bit(code, dev->key))
1156                         input_report_key(dev, code, 0);
1157         input_sync(dev);
1158
1159         del_timer_sync(&dev->timer);
1160
1161         list_for_each_entry_safe(handle, next, &dev->h_list, d_node)
1162                 handle->handler->disconnect(handle);
1163         WARN_ON(!list_empty(&dev->h_list));
1164
1165         list_del_init(&dev->node);
1166
1167         device_unregister(&dev->dev);
1168
1169         input_wakeup_procfs_readers();
1170 }
1171 EXPORT_SYMBOL(input_unregister_device);
1172
1173 int input_register_handler(struct input_handler *handler)
1174 {
1175         struct input_dev *dev;
1176
1177         INIT_LIST_HEAD(&handler->h_list);
1178
1179         if (handler->fops != NULL) {
1180                 if (input_table[handler->minor >> 5])
1181                         return -EBUSY;
1182
1183                 input_table[handler->minor >> 5] = handler;
1184         }
1185
1186         list_add_tail(&handler->node, &input_handler_list);
1187
1188         list_for_each_entry(dev, &input_dev_list, node)
1189                 input_attach_handler(dev, handler);
1190
1191         input_wakeup_procfs_readers();
1192         return 0;
1193 }
1194 EXPORT_SYMBOL(input_register_handler);
1195
1196 void input_unregister_handler(struct input_handler *handler)
1197 {
1198         struct input_handle *handle, *next;
1199
1200         list_for_each_entry_safe(handle, next, &handler->h_list, h_node)
1201                 handler->disconnect(handle);
1202         WARN_ON(!list_empty(&handler->h_list));
1203
1204         list_del_init(&handler->node);
1205
1206         if (handler->fops != NULL)
1207                 input_table[handler->minor >> 5] = NULL;
1208
1209         input_wakeup_procfs_readers();
1210 }
1211 EXPORT_SYMBOL(input_unregister_handler);
1212
1213 int input_register_handle(struct input_handle *handle)
1214 {
1215         struct input_handler *handler = handle->handler;
1216
1217         list_add_tail(&handle->d_node, &handle->dev->h_list);
1218         list_add_tail(&handle->h_node, &handler->h_list);
1219
1220         if (handler->start)
1221                 handler->start(handle);
1222
1223         return 0;
1224 }
1225 EXPORT_SYMBOL(input_register_handle);
1226
1227 void input_unregister_handle(struct input_handle *handle)
1228 {
1229         list_del_init(&handle->h_node);
1230         list_del_init(&handle->d_node);
1231 }
1232 EXPORT_SYMBOL(input_unregister_handle);
1233
1234 static int input_open_file(struct inode *inode, struct file *file)
1235 {
1236         struct input_handler *handler = input_table[iminor(inode) >> 5];
1237         const struct file_operations *old_fops, *new_fops = NULL;
1238         int err;
1239
1240         /* No load-on-demand here? */
1241         if (!handler || !(new_fops = fops_get(handler->fops)))
1242                 return -ENODEV;
1243
1244         /*
1245          * That's _really_ odd. Usually NULL ->open means "nothing special",
1246          * not "no device". Oh, well...
1247          */
1248         if (!new_fops->open) {
1249                 fops_put(new_fops);
1250                 return -ENODEV;
1251         }
1252         old_fops = file->f_op;
1253         file->f_op = new_fops;
1254
1255         err = new_fops->open(inode, file);
1256
1257         if (err) {
1258                 fops_put(file->f_op);
1259                 file->f_op = fops_get(old_fops);
1260         }
1261         fops_put(old_fops);
1262         return err;
1263 }
1264
1265 static const struct file_operations input_fops = {
1266         .owner = THIS_MODULE,
1267         .open = input_open_file,
1268 };
1269
1270 static int __init input_init(void)
1271 {
1272         int err;
1273
1274         err = class_register(&input_class);
1275         if (err) {
1276                 printk(KERN_ERR "input: unable to register input_dev class\n");
1277                 return err;
1278         }
1279
1280         err = input_proc_init();
1281         if (err)
1282                 goto fail1;
1283
1284         err = register_chrdev(INPUT_MAJOR, "input", &input_fops);
1285         if (err) {
1286                 printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR);
1287                 goto fail2;
1288         }
1289
1290         return 0;
1291
1292  fail2: input_proc_exit();
1293  fail1: class_unregister(&input_class);
1294         return err;
1295 }
1296
1297 static void __exit input_exit(void)
1298 {
1299         input_proc_exit();
1300         unregister_chrdev(INPUT_MAJOR, "input");
1301         class_unregister(&input_class);
1302 }
1303
1304 subsys_initcall(input_init);
1305 module_exit(input_exit);