[PATCH] INPUT: register the input class device sooner
[linux-2.6.git] / 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/sched.h>
15 #include <linux/smp_lock.h>
16 #include <linux/input.h>
17 #include <linux/module.h>
18 #include <linux/random.h>
19 #include <linux/major.h>
20 #include <linux/proc_fs.h>
21 #include <linux/kobject_uevent.h>
22 #include <linux/interrupt.h>
23 #include <linux/poll.h>
24 #include <linux/device.h>
25
26 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
27 MODULE_DESCRIPTION("Input core");
28 MODULE_LICENSE("GPL");
29
30 EXPORT_SYMBOL(input_allocate_device);
31 EXPORT_SYMBOL(input_register_device);
32 EXPORT_SYMBOL(input_unregister_device);
33 EXPORT_SYMBOL(input_register_handler);
34 EXPORT_SYMBOL(input_unregister_handler);
35 EXPORT_SYMBOL(input_grab_device);
36 EXPORT_SYMBOL(input_release_device);
37 EXPORT_SYMBOL(input_open_device);
38 EXPORT_SYMBOL(input_close_device);
39 EXPORT_SYMBOL(input_accept_process);
40 EXPORT_SYMBOL(input_flush_device);
41 EXPORT_SYMBOL(input_event);
42 EXPORT_SYMBOL(input_class);
43
44 #define INPUT_DEVICES   256
45
46 static LIST_HEAD(input_dev_list);
47 static LIST_HEAD(input_handler_list);
48
49 static struct input_handler *input_table[8];
50
51 void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
52 {
53         struct input_handle *handle;
54
55         if (type > EV_MAX || !test_bit(type, dev->evbit))
56                 return;
57
58         add_input_randomness(type, code, value);
59
60         switch (type) {
61
62                 case EV_SYN:
63                         switch (code) {
64                                 case SYN_CONFIG:
65                                         if (dev->event) dev->event(dev, type, code, value);
66                                         break;
67
68                                 case SYN_REPORT:
69                                         if (dev->sync) return;
70                                         dev->sync = 1;
71                                         break;
72                         }
73                         break;
74
75                 case EV_KEY:
76
77                         if (code > KEY_MAX || !test_bit(code, dev->keybit) || !!test_bit(code, dev->key) == value)
78                                 return;
79
80                         if (value == 2)
81                                 break;
82
83                         change_bit(code, dev->key);
84
85                         if (test_bit(EV_REP, dev->evbit) && dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && dev->timer.data && value) {
86                                 dev->repeat_key = code;
87                                 mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_DELAY]));
88                         }
89
90                         break;
91
92                 case EV_SW:
93
94                         if (code > SW_MAX || !test_bit(code, dev->swbit) || !!test_bit(code, dev->sw) == value)
95                                 return;
96
97                         change_bit(code, dev->sw);
98
99                         break;
100
101                 case EV_ABS:
102
103                         if (code > ABS_MAX || !test_bit(code, dev->absbit))
104                                 return;
105
106                         if (dev->absfuzz[code]) {
107                                 if ((value > dev->abs[code] - (dev->absfuzz[code] >> 1)) &&
108                                     (value < dev->abs[code] + (dev->absfuzz[code] >> 1)))
109                                         return;
110
111                                 if ((value > dev->abs[code] - dev->absfuzz[code]) &&
112                                     (value < dev->abs[code] + dev->absfuzz[code]))
113                                         value = (dev->abs[code] * 3 + value) >> 2;
114
115                                 if ((value > dev->abs[code] - (dev->absfuzz[code] << 1)) &&
116                                     (value < dev->abs[code] + (dev->absfuzz[code] << 1)))
117                                         value = (dev->abs[code] + value) >> 1;
118                         }
119
120                         if (dev->abs[code] == value)
121                                 return;
122
123                         dev->abs[code] = value;
124                         break;
125
126                 case EV_REL:
127
128                         if (code > REL_MAX || !test_bit(code, dev->relbit) || (value == 0))
129                                 return;
130
131                         break;
132
133                 case EV_MSC:
134
135                         if (code > MSC_MAX || !test_bit(code, dev->mscbit))
136                                 return;
137
138                         if (dev->event) dev->event(dev, type, code, value);
139
140                         break;
141
142                 case EV_LED:
143
144                         if (code > LED_MAX || !test_bit(code, dev->ledbit) || !!test_bit(code, dev->led) == value)
145                                 return;
146
147                         change_bit(code, dev->led);
148                         if (dev->event) dev->event(dev, type, code, value);
149
150                         break;
151
152                 case EV_SND:
153
154                         if (code > SND_MAX || !test_bit(code, dev->sndbit))
155                                 return;
156
157                         if (dev->event) dev->event(dev, type, code, value);
158
159                         break;
160
161                 case EV_REP:
162
163                         if (code > REP_MAX || value < 0 || dev->rep[code] == value) return;
164
165                         dev->rep[code] = value;
166                         if (dev->event) dev->event(dev, type, code, value);
167
168                         break;
169
170                 case EV_FF:
171                         if (dev->event) dev->event(dev, type, code, value);
172                         break;
173         }
174
175         if (type != EV_SYN)
176                 dev->sync = 0;
177
178         if (dev->grab)
179                 dev->grab->handler->event(dev->grab, type, code, value);
180         else
181                 list_for_each_entry(handle, &dev->h_list, d_node)
182                         if (handle->open)
183                                 handle->handler->event(handle, type, code, value);
184 }
185
186 static void input_repeat_key(unsigned long data)
187 {
188         struct input_dev *dev = (void *) data;
189
190         if (!test_bit(dev->repeat_key, dev->key))
191                 return;
192
193         input_event(dev, EV_KEY, dev->repeat_key, 2);
194         input_sync(dev);
195
196         if (dev->rep[REP_PERIOD])
197                 mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_PERIOD]));
198 }
199
200 int input_accept_process(struct input_handle *handle, struct file *file)
201 {
202         if (handle->dev->accept)
203                 return handle->dev->accept(handle->dev, file);
204
205         return 0;
206 }
207
208 int input_grab_device(struct input_handle *handle)
209 {
210         if (handle->dev->grab)
211                 return -EBUSY;
212
213         handle->dev->grab = handle;
214         return 0;
215 }
216
217 void input_release_device(struct input_handle *handle)
218 {
219         if (handle->dev->grab == handle)
220                 handle->dev->grab = NULL;
221 }
222
223 int input_open_device(struct input_handle *handle)
224 {
225         struct input_dev *dev = handle->dev;
226         int err;
227
228         err = down_interruptible(&dev->sem);
229         if (err)
230                 return err;
231
232         handle->open++;
233
234         if (!dev->users++ && dev->open)
235                 err = dev->open(dev);
236
237         if (err)
238                 handle->open--;
239
240         up(&dev->sem);
241
242         return err;
243 }
244
245 int input_flush_device(struct input_handle* handle, struct file* file)
246 {
247         if (handle->dev->flush)
248                 return handle->dev->flush(handle->dev, file);
249
250         return 0;
251 }
252
253 void input_close_device(struct input_handle *handle)
254 {
255         struct input_dev *dev = handle->dev;
256
257         input_release_device(handle);
258
259         down(&dev->sem);
260
261         if (!--dev->users && dev->close)
262                 dev->close(dev);
263         handle->open--;
264
265         up(&dev->sem);
266 }
267
268 static void input_link_handle(struct input_handle *handle)
269 {
270         list_add_tail(&handle->d_node, &handle->dev->h_list);
271         list_add_tail(&handle->h_node, &handle->handler->h_list);
272 }
273
274 #define MATCH_BIT(bit, max) \
275                 for (i = 0; i < NBITS(max); i++) \
276                         if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \
277                                 break; \
278                 if (i != NBITS(max)) \
279                         continue;
280
281 static struct input_device_id *input_match_device(struct input_device_id *id, struct input_dev *dev)
282 {
283         int i;
284
285         for (; id->flags || id->driver_info; id++) {
286
287                 if (id->flags & INPUT_DEVICE_ID_MATCH_BUS)
288                         if (id->id.bustype != dev->id.bustype)
289                                 continue;
290
291                 if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR)
292                         if (id->id.vendor != dev->id.vendor)
293                                 continue;
294
295                 if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT)
296                         if (id->id.product != dev->id.product)
297                                 continue;
298
299                 if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION)
300                         if (id->id.version != dev->id.version)
301                                 continue;
302
303                 MATCH_BIT(evbit,  EV_MAX);
304                 MATCH_BIT(keybit, KEY_MAX);
305                 MATCH_BIT(relbit, REL_MAX);
306                 MATCH_BIT(absbit, ABS_MAX);
307                 MATCH_BIT(mscbit, MSC_MAX);
308                 MATCH_BIT(ledbit, LED_MAX);
309                 MATCH_BIT(sndbit, SND_MAX);
310                 MATCH_BIT(ffbit,  FF_MAX);
311                 MATCH_BIT(swbit,  SW_MAX);
312
313                 return id;
314         }
315
316         return NULL;
317 }
318
319
320 /*
321  * Input hotplugging interface - loading event handlers based on
322  * device bitfields.
323  */
324
325 #ifdef CONFIG_HOTPLUG
326
327 /*
328  * Input hotplugging invokes what /proc/sys/kernel/hotplug says
329  * (normally /sbin/hotplug) when input devices get added or removed.
330  *
331  * This invokes a user mode policy agent, typically helping to load driver
332  * or other modules, configure the device, and more.  Drivers can provide
333  * a MODULE_DEVICE_TABLE to help with module loading subtasks.
334  *
335  */
336
337 #define SPRINTF_BIT_A(bit, name, max) \
338         do { \
339                 envp[i++] = scratch; \
340                 scratch += sprintf(scratch, name); \
341                 for (j = NBITS(max) - 1; j >= 0; j--) \
342                         if (dev->bit[j]) break; \
343                 for (; j >= 0; j--) \
344                         scratch += sprintf(scratch, "%lx ", dev->bit[j]); \
345                 scratch++; \
346         } while (0)
347
348 #define SPRINTF_BIT_A2(bit, name, max, ev) \
349         do { \
350                 if (test_bit(ev, dev->evbit)) \
351                         SPRINTF_BIT_A(bit, name, max); \
352         } while (0)
353
354 static void input_call_hotplug(char *verb, struct input_dev *dev)
355 {
356         char *argv[3], **envp, *buf, *scratch;
357         int i = 0, j, value;
358
359         if (!hotplug_path[0]) {
360                 printk(KERN_ERR "input.c: calling hotplug without a hotplug agent defined\n");
361                 return;
362         }
363         if (in_interrupt()) {
364                 printk(KERN_ERR "input.c: calling hotplug from interrupt\n");
365                 return;
366         }
367         if (!current->fs->root) {
368                 printk(KERN_WARNING "input.c: calling hotplug without valid filesystem\n");
369                 return;
370         }
371         if (!(envp = (char **) kmalloc(20 * sizeof(char *), GFP_KERNEL))) {
372                 printk(KERN_ERR "input.c: not enough memory allocating hotplug environment\n");
373                 return;
374         }
375         if (!(buf = kmalloc(1024, GFP_KERNEL))) {
376                 kfree (envp);
377                 printk(KERN_ERR "input.c: not enough memory allocating hotplug environment\n");
378                 return;
379         }
380
381         argv[0] = hotplug_path;
382         argv[1] = "input";
383         argv[2] = NULL;
384
385         envp[i++] = "HOME=/";
386         envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
387
388         scratch = buf;
389
390         envp[i++] = scratch;
391         scratch += sprintf(scratch, "ACTION=%s", verb) + 1;
392
393         envp[i++] = scratch;
394         scratch += sprintf(scratch, "PRODUCT=%x/%x/%x/%x",
395                 dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version) + 1;
396
397         if (dev->name) {
398                 envp[i++] = scratch;
399                 scratch += sprintf(scratch, "NAME=%s", dev->name) + 1;
400         }
401
402         if (dev->phys) {
403                 envp[i++] = scratch;
404                 scratch += sprintf(scratch, "PHYS=%s", dev->phys) + 1;
405         }
406
407         SPRINTF_BIT_A(evbit, "EV=", EV_MAX);
408         SPRINTF_BIT_A2(keybit, "KEY=", KEY_MAX, EV_KEY);
409         SPRINTF_BIT_A2(relbit, "REL=", REL_MAX, EV_REL);
410         SPRINTF_BIT_A2(absbit, "ABS=", ABS_MAX, EV_ABS);
411         SPRINTF_BIT_A2(mscbit, "MSC=", MSC_MAX, EV_MSC);
412         SPRINTF_BIT_A2(ledbit, "LED=", LED_MAX, EV_LED);
413         SPRINTF_BIT_A2(sndbit, "SND=", SND_MAX, EV_SND);
414         SPRINTF_BIT_A2(ffbit,  "FF=",  FF_MAX, EV_FF);
415         SPRINTF_BIT_A2(swbit,  "SW=",  SW_MAX, EV_SW);
416
417         envp[i++] = NULL;
418
419 #ifdef INPUT_DEBUG
420         printk(KERN_DEBUG "input.c: calling %s %s [%s %s %s %s %s]\n",
421                 argv[0], argv[1], envp[0], envp[1], envp[2], envp[3], envp[4]);
422 #endif
423
424         value = call_usermodehelper(argv [0], argv, envp, 0);
425
426         kfree(buf);
427         kfree(envp);
428
429 #ifdef INPUT_DEBUG
430         if (value != 0)
431                 printk(KERN_DEBUG "input.c: hotplug returned %d\n", value);
432 #endif
433 }
434
435 #endif
436
437 static int input_print_bitmap(char *buf, unsigned long *bitmap, int max)
438 {
439         int i;
440         int len = 0;
441
442         for (i = NBITS(max) - 1; i > 0; i--)
443                 if (bitmap[i])
444                         break;
445
446         for (; i >= 0; i--)
447                 len += sprintf(buf + len, "%lx%s", bitmap[i], i > 0 ? " " : "");
448
449         len += sprintf(buf + len, "\n");
450
451         return len;
452 }
453
454 #ifdef CONFIG_PROC_FS
455
456 static struct proc_dir_entry *proc_bus_input_dir;
457 static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait);
458 static int input_devices_state;
459
460 static inline void input_wakeup_procfs_readers(void)
461 {
462         input_devices_state++;
463         wake_up(&input_devices_poll_wait);
464 }
465
466 static unsigned int input_devices_poll(struct file *file, poll_table *wait)
467 {
468         int state = input_devices_state;
469         poll_wait(file, &input_devices_poll_wait, wait);
470         if (state != input_devices_state)
471                 return POLLIN | POLLRDNORM;
472         return 0;
473 }
474
475 #define SPRINTF_BIT_B(ev, bm)                                           \
476         do {                                                            \
477                 len += sprintf(buf + len, "B: %s=", #ev);               \
478                 len += input_print_bitmap(buf + len,                    \
479                                         dev->bm##bit, ev##_MAX);        \
480         } while (0)
481
482 #define SPRINTF_BIT_B2(ev, bm)                                          \
483         do {                                                            \
484                 if (test_bit(EV_##ev, dev->evbit))                      \
485                         SPRINTF_BIT_B(ev, bm);                          \
486         } while (0)
487
488 static int input_devices_read(char *buf, char **start, off_t pos, int count, int *eof, void *data)
489 {
490         struct input_dev *dev;
491         struct input_handle *handle;
492         const char *path;
493
494         off_t at = 0;
495         int len, cnt = 0;
496
497         list_for_each_entry(dev, &input_dev_list, node) {
498
499                 path = dev->dynalloc ? kobject_get_path(&dev->cdev.kobj, GFP_KERNEL) : NULL;
500
501                 len = sprintf(buf, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n",
502                         dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version);
503
504                 len += sprintf(buf + len, "N: Name=\"%s\"\n", dev->name ? dev->name : "");
505                 len += sprintf(buf + len, "P: Phys=%s\n", dev->phys ? dev->phys : "");
506                 len += sprintf(buf + len, "S: Sysfs=%s\n", path ? path : "");
507                 len += sprintf(buf + len, "H: Handlers=");
508
509                 list_for_each_entry(handle, &dev->h_list, d_node)
510                         len += sprintf(buf + len, "%s ", handle->name);
511
512                 len += sprintf(buf + len, "\n");
513
514                 SPRINTF_BIT_B(EV, ev);
515                 SPRINTF_BIT_B2(KEY, key);
516                 SPRINTF_BIT_B2(REL, rel);
517                 SPRINTF_BIT_B2(ABS, abs);
518                 SPRINTF_BIT_B2(MSC, msc);
519                 SPRINTF_BIT_B2(LED, led);
520                 SPRINTF_BIT_B2(SND, snd);
521                 SPRINTF_BIT_B2(FF, ff);
522                 SPRINTF_BIT_B2(SW, sw);
523
524                 len += sprintf(buf + len, "\n");
525
526                 at += len;
527
528                 if (at >= pos) {
529                         if (!*start) {
530                                 *start = buf + (pos - (at - len));
531                                 cnt = at - pos;
532                         } else  cnt += len;
533                         buf += len;
534                         if (cnt >= count)
535                                 break;
536                 }
537
538                 kfree(path);
539         }
540
541         if (&dev->node == &input_dev_list)
542                 *eof = 1;
543
544         return (count > cnt) ? cnt : count;
545 }
546
547 static int input_handlers_read(char *buf, char **start, off_t pos, int count, int *eof, void *data)
548 {
549         struct input_handler *handler;
550
551         off_t at = 0;
552         int len = 0, cnt = 0;
553         int i = 0;
554
555         list_for_each_entry(handler, &input_handler_list, node) {
556
557                 if (handler->fops)
558                         len = sprintf(buf, "N: Number=%d Name=%s Minor=%d\n",
559                                 i++, handler->name, handler->minor);
560                 else
561                         len = sprintf(buf, "N: Number=%d Name=%s\n",
562                                 i++, handler->name);
563
564                 at += len;
565
566                 if (at >= pos) {
567                         if (!*start) {
568                                 *start = buf + (pos - (at - len));
569                                 cnt = at - pos;
570                         } else  cnt += len;
571                         buf += len;
572                         if (cnt >= count)
573                                 break;
574                 }
575         }
576         if (&handler->node == &input_handler_list)
577                 *eof = 1;
578
579         return (count > cnt) ? cnt : count;
580 }
581
582 static struct file_operations input_fileops;
583
584 static int __init input_proc_init(void)
585 {
586         struct proc_dir_entry *entry;
587
588         proc_bus_input_dir = proc_mkdir("input", proc_bus);
589         if (!proc_bus_input_dir)
590                 return -ENOMEM;
591
592         proc_bus_input_dir->owner = THIS_MODULE;
593
594         entry = create_proc_read_entry("devices", 0, proc_bus_input_dir, input_devices_read, NULL);
595         if (!entry)
596                 goto fail1;
597
598         entry->owner = THIS_MODULE;
599         input_fileops = *entry->proc_fops;
600         entry->proc_fops = &input_fileops;
601         entry->proc_fops->poll = input_devices_poll;
602
603         entry = create_proc_read_entry("handlers", 0, proc_bus_input_dir, input_handlers_read, NULL);
604         if (!entry)
605                 goto fail2;
606
607         entry->owner = THIS_MODULE;
608
609         return 0;
610
611  fail2: remove_proc_entry("devices", proc_bus_input_dir);
612  fail1: remove_proc_entry("input", proc_bus);
613         return -ENOMEM;
614 }
615
616 static void input_proc_exit(void)
617 {
618         remove_proc_entry("devices", proc_bus_input_dir);
619         remove_proc_entry("handlers", proc_bus_input_dir);
620         remove_proc_entry("input", proc_bus);
621 }
622
623 #else /* !CONFIG_PROC_FS */
624 static inline void input_wakeup_procfs_readers(void) { }
625 static inline int input_proc_init(void) { return 0; }
626 static inline void input_proc_exit(void) { }
627 #endif
628
629 #define INPUT_DEV_STRING_ATTR_SHOW(name)                                        \
630 static ssize_t input_dev_show_##name(struct class_device *dev, char *buf)       \
631 {                                                                               \
632         struct input_dev *input_dev = to_input_dev(dev);                        \
633         int retval;                                                             \
634                                                                                 \
635         retval = down_interruptible(&input_dev->sem);                           \
636         if (retval)                                                             \
637                 return retval;                                                  \
638                                                                                 \
639         retval = sprintf(buf, "%s\n", input_dev->name ? input_dev->name : "");  \
640                                                                                 \
641         up(&input_dev->sem);                                                    \
642                                                                                 \
643         return retval;                                                          \
644 }
645
646 INPUT_DEV_STRING_ATTR_SHOW(name);
647 INPUT_DEV_STRING_ATTR_SHOW(phys);
648 INPUT_DEV_STRING_ATTR_SHOW(uniq);
649
650 static struct class_device_attribute input_dev_attrs[] = {
651         __ATTR(name, S_IRUGO, input_dev_show_name, NULL),
652         __ATTR(phys, S_IRUGO, input_dev_show_phys, NULL),
653         __ATTR(uniq, S_IRUGO, input_dev_show_uniq, NULL),
654         __ATTR_NULL
655 };
656
657 #define INPUT_DEV_ID_ATTR(name)                                                 \
658 static ssize_t input_dev_show_id_##name(struct class_device *dev, char *buf)    \
659 {                                                                               \
660         struct input_dev *input_dev = to_input_dev(dev);                        \
661         return sprintf(buf, "%04x\n", input_dev->id.name);                      \
662 }                                                                               \
663 static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL);
664
665 INPUT_DEV_ID_ATTR(bustype);
666 INPUT_DEV_ID_ATTR(vendor);
667 INPUT_DEV_ID_ATTR(product);
668 INPUT_DEV_ID_ATTR(version);
669
670 static struct attribute *input_dev_id_attrs[] = {
671         &class_device_attr_bustype.attr,
672         &class_device_attr_vendor.attr,
673         &class_device_attr_product.attr,
674         &class_device_attr_version.attr,
675         NULL
676 };
677
678 static struct attribute_group input_dev_id_attr_group = {
679         .name   = "id",
680         .attrs  = input_dev_id_attrs,
681 };
682
683 #define INPUT_DEV_CAP_ATTR(ev, bm)                                              \
684 static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf)     \
685 {                                                                               \
686         struct input_dev *input_dev = to_input_dev(dev);                        \
687         return input_print_bitmap(buf, input_dev->bm##bit, ev##_MAX);           \
688 }                                                                               \
689 static CLASS_DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL);
690
691 INPUT_DEV_CAP_ATTR(EV, ev);
692 INPUT_DEV_CAP_ATTR(KEY, key);
693 INPUT_DEV_CAP_ATTR(REL, rel);
694 INPUT_DEV_CAP_ATTR(ABS, abs);
695 INPUT_DEV_CAP_ATTR(MSC, msc);
696 INPUT_DEV_CAP_ATTR(LED, led);
697 INPUT_DEV_CAP_ATTR(SND, snd);
698 INPUT_DEV_CAP_ATTR(FF, ff);
699 INPUT_DEV_CAP_ATTR(SW, sw);
700
701 static struct attribute *input_dev_caps_attrs[] = {
702         &class_device_attr_ev.attr,
703         &class_device_attr_key.attr,
704         &class_device_attr_rel.attr,
705         &class_device_attr_abs.attr,
706         &class_device_attr_msc.attr,
707         &class_device_attr_led.attr,
708         &class_device_attr_snd.attr,
709         &class_device_attr_ff.attr,
710         &class_device_attr_sw.attr,
711         NULL
712 };
713
714 static struct attribute_group input_dev_caps_attr_group = {
715         .name   = "capabilities",
716         .attrs  = input_dev_caps_attrs,
717 };
718
719 static void input_dev_release(struct class_device *class_dev)
720 {
721         struct input_dev *dev = to_input_dev(class_dev);
722
723         kfree(dev);
724         module_put(THIS_MODULE);
725 }
726
727 static struct class input_dev_class = {
728         .name                   = "input_dev",
729         .release                = input_dev_release,
730         .class_dev_attrs        = input_dev_attrs,
731 };
732
733 struct input_dev *input_allocate_device(void)
734 {
735         struct input_dev *dev;
736
737         dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL);
738         if (dev) {
739                 dev->dynalloc = 1;
740                 dev->cdev.class = &input_dev_class;
741                 class_device_initialize(&dev->cdev);
742                 INIT_LIST_HEAD(&dev->h_list);
743                 INIT_LIST_HEAD(&dev->node);
744         }
745
746         return dev;
747 }
748
749 static void input_register_classdevice(struct input_dev *dev)
750 {
751         static atomic_t input_no = ATOMIC_INIT(0);
752         const char *path;
753
754         __module_get(THIS_MODULE);
755
756         dev->dev = dev->cdev.dev;
757
758         snprintf(dev->cdev.class_id, sizeof(dev->cdev.class_id),
759                  "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1);
760
761         path = kobject_get_path(&dev->cdev.class->subsys.kset.kobj, GFP_KERNEL);
762         printk(KERN_INFO "input: %s/%s as %s\n",
763                 dev->name ? dev->name : "Unspecified device",
764                 path ? path : "", dev->cdev.class_id);
765         kfree(path);
766
767         class_device_add(&dev->cdev);
768         sysfs_create_group(&dev->cdev.kobj, &input_dev_id_attr_group);
769         sysfs_create_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
770 }
771
772 void input_register_device(struct input_dev *dev)
773 {
774         struct input_handle *handle;
775         struct input_handler *handler;
776         struct input_device_id *id;
777
778         set_bit(EV_SYN, dev->evbit);
779
780         init_MUTEX(&dev->sem);
781
782         /*
783          * If delay and period are pre-set by the driver, then autorepeating
784          * is handled by the driver itself and we don't do it in input.c.
785          */
786
787         init_timer(&dev->timer);
788         if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) {
789                 dev->timer.data = (long) dev;
790                 dev->timer.function = input_repeat_key;
791                 dev->rep[REP_DELAY] = 250;
792                 dev->rep[REP_PERIOD] = 33;
793         }
794
795         INIT_LIST_HEAD(&dev->h_list);
796         list_add_tail(&dev->node, &input_dev_list);
797
798         if (dev->dynalloc)
799                 input_register_classdevice(dev);
800
801         list_for_each_entry(handler, &input_handler_list, node)
802                 if (!handler->blacklist || !input_match_device(handler->blacklist, dev))
803                         if ((id = input_match_device(handler->id_table, dev)))
804                                 if ((handle = handler->connect(handler, dev, id)))
805                                         input_link_handle(handle);
806
807
808 #ifdef CONFIG_HOTPLUG
809         input_call_hotplug("add", dev);
810 #endif
811
812         input_wakeup_procfs_readers();
813 }
814
815 void input_unregister_device(struct input_dev *dev)
816 {
817         struct list_head * node, * next;
818
819         if (!dev) return;
820
821         del_timer_sync(&dev->timer);
822
823         list_for_each_safe(node, next, &dev->h_list) {
824                 struct input_handle * handle = to_handle(node);
825                 list_del_init(&handle->d_node);
826                 list_del_init(&handle->h_node);
827                 handle->handler->disconnect(handle);
828         }
829
830 #ifdef CONFIG_HOTPLUG
831         input_call_hotplug("remove", dev);
832 #endif
833
834         list_del_init(&dev->node);
835
836         if (dev->dynalloc) {
837                 sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
838                 sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group);
839                 class_device_unregister(&dev->cdev);
840         }
841
842         input_wakeup_procfs_readers();
843 }
844
845 void input_register_handler(struct input_handler *handler)
846 {
847         struct input_dev *dev;
848         struct input_handle *handle;
849         struct input_device_id *id;
850
851         if (!handler) return;
852
853         INIT_LIST_HEAD(&handler->h_list);
854
855         if (handler->fops != NULL)
856                 input_table[handler->minor >> 5] = handler;
857
858         list_add_tail(&handler->node, &input_handler_list);
859
860         list_for_each_entry(dev, &input_dev_list, node)
861                 if (!handler->blacklist || !input_match_device(handler->blacklist, dev))
862                         if ((id = input_match_device(handler->id_table, dev)))
863                                 if ((handle = handler->connect(handler, dev, id)))
864                                         input_link_handle(handle);
865
866         input_wakeup_procfs_readers();
867 }
868
869 void input_unregister_handler(struct input_handler *handler)
870 {
871         struct list_head * node, * next;
872
873         list_for_each_safe(node, next, &handler->h_list) {
874                 struct input_handle * handle = to_handle_h(node);
875                 list_del_init(&handle->h_node);
876                 list_del_init(&handle->d_node);
877                 handler->disconnect(handle);
878         }
879
880         list_del_init(&handler->node);
881
882         if (handler->fops != NULL)
883                 input_table[handler->minor >> 5] = NULL;
884
885         input_wakeup_procfs_readers();
886 }
887
888 static int input_open_file(struct inode *inode, struct file *file)
889 {
890         struct input_handler *handler = input_table[iminor(inode) >> 5];
891         struct file_operations *old_fops, *new_fops = NULL;
892         int err;
893
894         /* No load-on-demand here? */
895         if (!handler || !(new_fops = fops_get(handler->fops)))
896                 return -ENODEV;
897
898         /*
899          * That's _really_ odd. Usually NULL ->open means "nothing special",
900          * not "no device". Oh, well...
901          */
902         if (!new_fops->open) {
903                 fops_put(new_fops);
904                 return -ENODEV;
905         }
906         old_fops = file->f_op;
907         file->f_op = new_fops;
908
909         err = new_fops->open(inode, file);
910
911         if (err) {
912                 fops_put(file->f_op);
913                 file->f_op = fops_get(old_fops);
914         }
915         fops_put(old_fops);
916         return err;
917 }
918
919 static struct file_operations input_fops = {
920         .owner = THIS_MODULE,
921         .open = input_open_file,
922 };
923
924 struct class *input_class;
925
926 static int __init input_init(void)
927 {
928         int err;
929
930         err = class_register(&input_dev_class);
931         if (err) {
932                 printk(KERN_ERR "input: unable to register input_dev class\n");
933                 return err;
934         }
935
936         input_class = class_create(THIS_MODULE, "input");
937         if (IS_ERR(input_class)) {
938                 printk(KERN_ERR "input: unable to register input class\n");
939                 err = PTR_ERR(input_class);
940                 goto fail1;
941         }
942
943         err = input_proc_init();
944         if (err)
945                 goto fail2;
946
947         err = register_chrdev(INPUT_MAJOR, "input", &input_fops);
948         if (err) {
949                 printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR);
950                 goto fail3;
951         }
952
953         return 0;
954
955  fail3: input_proc_exit();
956  fail2: class_destroy(input_class);
957  fail1: class_unregister(&input_dev_class);
958         return err;
959 }
960
961 static void __exit input_exit(void)
962 {
963         input_proc_exit();
964         unregister_chrdev(INPUT_MAJOR, "input");
965         class_destroy(input_class);
966         class_unregister(&input_dev_class);
967 }
968
969 subsys_initcall(input_init);
970 module_exit(input_exit);