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