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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/seq_file.h>
22#include <linux/interrupt.h>
23#include <linux/poll.h>
24#include <linux/device.h>
25#include <linux/mutex.h>
26
27MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
28MODULE_DESCRIPTION("Input core");
29MODULE_LICENSE("GPL");
30
31#define INPUT_DEVICES 256
32
33static LIST_HEAD(input_dev_list);
34static LIST_HEAD(input_handler_list);
35
36static struct input_handler *input_table[8];
37
38
39
40
41
42
43
44
45
46
47
48void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
49{
50 struct input_handle *handle;
51
52 if (type > EV_MAX || !test_bit(type, dev->evbit))
53 return;
54
55 add_input_randomness(type, code, value);
56
57 switch (type) {
58
59 case EV_SYN:
60 switch (code) {
61 case SYN_CONFIG:
62 if (dev->event)
63 dev->event(dev, type, code, value);
64 break;
65
66 case SYN_REPORT:
67 if (dev->sync)
68 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)
138 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
149 if (dev->event)
150 dev->event(dev, type, code, value);
151
152 break;
153
154 case EV_SND:
155
156 if (code > SND_MAX || !test_bit(code, dev->sndbit))
157 return;
158
159 if (!!test_bit(code, dev->snd) != !!value)
160 change_bit(code, dev->snd);
161
162 if (dev->event)
163 dev->event(dev, type, code, value);
164
165 break;
166
167 case EV_REP:
168
169 if (code > REP_MAX || value < 0 || dev->rep[code] == value)
170 return;
171
172 dev->rep[code] = value;
173 if (dev->event)
174 dev->event(dev, type, code, value);
175
176 break;
177
178 case EV_FF:
179 if (dev->event)
180 dev->event(dev, type, code, value);
181 break;
182 }
183
184 if (type != EV_SYN)
185 dev->sync = 0;
186
187 if (dev->grab)
188 dev->grab->handler->event(dev->grab, type, code, value);
189 else
190 list_for_each_entry(handle, &dev->h_list, d_node)
191 if (handle->open)
192 handle->handler->event(handle, type, code, value);
193}
194EXPORT_SYMBOL(input_event);
195
196
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198
199
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201
202
203
204
205
206void input_inject_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
207{
208 if (!handle->dev->grab || handle->dev->grab == handle)
209 input_event(handle->dev, type, code, value);
210}
211EXPORT_SYMBOL(input_inject_event);
212
213static void input_repeat_key(unsigned long data)
214{
215 struct input_dev *dev = (void *) data;
216
217 if (!test_bit(dev->repeat_key, dev->key))
218 return;
219
220 input_event(dev, EV_KEY, dev->repeat_key, 2);
221 input_sync(dev);
222
223 if (dev->rep[REP_PERIOD])
224 mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_PERIOD]));
225}
226
227int input_grab_device(struct input_handle *handle)
228{
229 if (handle->dev->grab)
230 return -EBUSY;
231
232 handle->dev->grab = handle;
233 return 0;
234}
235EXPORT_SYMBOL(input_grab_device);
236
237void input_release_device(struct input_handle *handle)
238{
239 struct input_dev *dev = handle->dev;
240
241 if (dev->grab == handle) {
242 dev->grab = NULL;
243
244 list_for_each_entry(handle, &dev->h_list, d_node)
245 if (handle->handler->start)
246 handle->handler->start(handle);
247 }
248}
249EXPORT_SYMBOL(input_release_device);
250
251int input_open_device(struct input_handle *handle)
252{
253 struct input_dev *dev = handle->dev;
254 int err;
255
256 err = mutex_lock_interruptible(&dev->mutex);
257 if (err)
258 return err;
259
260 handle->open++;
261
262 if (!dev->users++ && dev->open)
263 err = dev->open(dev);
264
265 if (err)
266 handle->open--;
267
268 mutex_unlock(&dev->mutex);
269
270 return err;
271}
272EXPORT_SYMBOL(input_open_device);
273
274int input_flush_device(struct input_handle* handle, struct file* file)
275{
276 if (handle->dev->flush)
277 return handle->dev->flush(handle->dev, file);
278
279 return 0;
280}
281EXPORT_SYMBOL(input_flush_device);
282
283void input_close_device(struct input_handle *handle)
284{
285 struct input_dev *dev = handle->dev;
286
287 input_release_device(handle);
288
289 mutex_lock(&dev->mutex);
290
291 if (!--dev->users && dev->close)
292 dev->close(dev);
293 handle->open--;
294
295 mutex_unlock(&dev->mutex);
296}
297EXPORT_SYMBOL(input_close_device);
298
299static void input_link_handle(struct input_handle *handle)
300{
301 list_add_tail(&handle->d_node, &handle->dev->h_list);
302 list_add_tail(&handle->h_node, &handle->handler->h_list);
303}
304
305#define MATCH_BIT(bit, max) \
306 for (i = 0; i < NBITS(max); i++) \
307 if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \
308 break; \
309 if (i != NBITS(max)) \
310 continue;
311
312static struct input_device_id *input_match_device(struct input_device_id *id, struct input_dev *dev)
313{
314 int i;
315
316 for (; id->flags || id->driver_info; id++) {
317
318 if (id->flags & INPUT_DEVICE_ID_MATCH_BUS)
319 if (id->bustype != dev->id.bustype)
320 continue;
321
322 if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR)
323 if (id->vendor != dev->id.vendor)
324 continue;
325
326 if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT)
327 if (id->product != dev->id.product)
328 continue;
329
330 if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION)
331 if (id->version != dev->id.version)
332 continue;
333
334 MATCH_BIT(evbit, EV_MAX);
335 MATCH_BIT(keybit, KEY_MAX);
336 MATCH_BIT(relbit, REL_MAX);
337 MATCH_BIT(absbit, ABS_MAX);
338 MATCH_BIT(mscbit, MSC_MAX);
339 MATCH_BIT(ledbit, LED_MAX);
340 MATCH_BIT(sndbit, SND_MAX);
341 MATCH_BIT(ffbit, FF_MAX);
342 MATCH_BIT(swbit, SW_MAX);
343
344 return id;
345 }
346
347 return NULL;
348}
349
350#ifdef CONFIG_PROC_FS
351
352static struct proc_dir_entry *proc_bus_input_dir;
353static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait);
354static int input_devices_state;
355
356static inline void input_wakeup_procfs_readers(void)
357{
358 input_devices_state++;
359 wake_up(&input_devices_poll_wait);
360}
361
362static unsigned int input_proc_devices_poll(struct file *file, poll_table *wait)
363{
364 int state = input_devices_state;
365
366 poll_wait(file, &input_devices_poll_wait, wait);
367 if (state != input_devices_state)
368 return POLLIN | POLLRDNORM;
369
370 return 0;
371}
372
373static struct list_head *list_get_nth_element(struct list_head *list, loff_t *pos)
374{
375 struct list_head *node;
376 loff_t i = 0;
377
378 list_for_each(node, list)
379 if (i++ == *pos)
380 return node;
381
382 return NULL;
383}
384
385static struct list_head *list_get_next_element(struct list_head *list, struct list_head *element, loff_t *pos)
386{
387 if (element->next == list)
388 return NULL;
389
390 ++(*pos);
391 return element->next;
392}
393
394static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos)
395{
396
397
398 return list_get_nth_element(&input_dev_list, pos);
399}
400
401static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos)
402{
403 return list_get_next_element(&input_dev_list, v, pos);
404}
405
406static void input_devices_seq_stop(struct seq_file *seq, void *v)
407{
408
409}
410
411static void input_seq_print_bitmap(struct seq_file *seq, const char *name,
412 unsigned long *bitmap, int max)
413{
414 int i;
415
416 for (i = NBITS(max) - 1; i > 0; i--)
417 if (bitmap[i])
418 break;
419
420 seq_printf(seq, "B: %s=", name);
421 for (; i >= 0; i--)
422 seq_printf(seq, "%lx%s", bitmap[i], i > 0 ? " " : "");
423 seq_putc(seq, '\n');
424}
425
426static int input_devices_seq_show(struct seq_file *seq, void *v)
427{
428 struct input_dev *dev = container_of(v, struct input_dev, node);
429 const char *path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL);
430 struct input_handle *handle;
431
432 seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n",
433 dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version);
434
435 seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : "");
436 seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : "");
437 seq_printf(seq, "S: Sysfs=%s\n", path ? path : "");
438 seq_printf(seq, "H: Handlers=");
439
440 list_for_each_entry(handle, &dev->h_list, d_node)
441 seq_printf(seq, "%s ", handle->name);
442 seq_putc(seq, '\n');
443
444 input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX);
445 if (test_bit(EV_KEY, dev->evbit))
446 input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX);
447 if (test_bit(EV_REL, dev->evbit))
448 input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX);
449 if (test_bit(EV_ABS, dev->evbit))
450 input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX);
451 if (test_bit(EV_MSC, dev->evbit))
452 input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX);
453 if (test_bit(EV_LED, dev->evbit))
454 input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX);
455 if (test_bit(EV_SND, dev->evbit))
456 input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX);
457 if (test_bit(EV_FF, dev->evbit))
458 input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX);
459 if (test_bit(EV_SW, dev->evbit))
460 input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX);
461
462 seq_putc(seq, '\n');
463
464 kfree(path);
465 return 0;
466}
467
468static struct seq_operations input_devices_seq_ops = {
469 .start = input_devices_seq_start,
470 .next = input_devices_seq_next,
471 .stop = input_devices_seq_stop,
472 .show = input_devices_seq_show,
473};
474
475static int input_proc_devices_open(struct inode *inode, struct file *file)
476{
477 return seq_open(file, &input_devices_seq_ops);
478}
479
480static struct file_operations input_devices_fileops = {
481 .owner = THIS_MODULE,
482 .open = input_proc_devices_open,
483 .poll = input_proc_devices_poll,
484 .read = seq_read,
485 .llseek = seq_lseek,
486 .release = seq_release,
487};
488
489static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos)
490{
491
492 seq->private = (void *)(unsigned long)*pos;
493 return list_get_nth_element(&input_handler_list, pos);
494}
495
496static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos)
497{
498 seq->private = (void *)(unsigned long)(*pos + 1);
499 return list_get_next_element(&input_handler_list, v, pos);
500}
501
502static void input_handlers_seq_stop(struct seq_file *seq, void *v)
503{
504
505}
506
507static int input_handlers_seq_show(struct seq_file *seq, void *v)
508{
509 struct input_handler *handler = container_of(v, struct input_handler, node);
510
511 seq_printf(seq, "N: Number=%ld Name=%s",
512 (unsigned long)seq->private, handler->name);
513 if (handler->fops)
514 seq_printf(seq, " Minor=%d", handler->minor);
515 seq_putc(seq, '\n');
516
517 return 0;
518}
519static struct seq_operations input_handlers_seq_ops = {
520 .start = input_handlers_seq_start,
521 .next = input_handlers_seq_next,
522 .stop = input_handlers_seq_stop,
523 .show = input_handlers_seq_show,
524};
525
526static int input_proc_handlers_open(struct inode *inode, struct file *file)
527{
528 return seq_open(file, &input_handlers_seq_ops);
529}
530
531static struct file_operations input_handlers_fileops = {
532 .owner = THIS_MODULE,
533 .open = input_proc_handlers_open,
534 .read = seq_read,
535 .llseek = seq_lseek,
536 .release = seq_release,
537};
538
539static int __init input_proc_init(void)
540{
541 struct proc_dir_entry *entry;
542
543 proc_bus_input_dir = proc_mkdir("input", proc_bus);
544 if (!proc_bus_input_dir)
545 return -ENOMEM;
546
547 proc_bus_input_dir->owner = THIS_MODULE;
548
549 entry = create_proc_entry("devices", 0, proc_bus_input_dir);
550 if (!entry)
551 goto fail1;
552
553 entry->owner = THIS_MODULE;
554 entry->proc_fops = &input_devices_fileops;
555
556 entry = create_proc_entry("handlers", 0, proc_bus_input_dir);
557 if (!entry)
558 goto fail2;
559
560 entry->owner = THIS_MODULE;
561 entry->proc_fops = &input_handlers_fileops;
562
563 return 0;
564
565 fail2: remove_proc_entry("devices", proc_bus_input_dir);
566 fail1: remove_proc_entry("input", proc_bus);
567 return -ENOMEM;
568}
569
570static void input_proc_exit(void)
571{
572 remove_proc_entry("devices", proc_bus_input_dir);
573 remove_proc_entry("handlers", proc_bus_input_dir);
574 remove_proc_entry("input", proc_bus);
575}
576
577#else
578static inline void input_wakeup_procfs_readers(void) { }
579static inline int input_proc_init(void) { return 0; }
580static inline void input_proc_exit(void) { }
581#endif
582
583#define INPUT_DEV_STRING_ATTR_SHOW(name) \
584static ssize_t input_dev_show_##name(struct class_device *dev, char *buf) \
585{ \
586 struct input_dev *input_dev = to_input_dev(dev); \
587 int retval; \
588 \
589 retval = mutex_lock_interruptible(&input_dev->mutex); \
590 if (retval) \
591 return retval; \
592 \
593 retval = scnprintf(buf, PAGE_SIZE, \
594 "%s\n", input_dev->name ? input_dev->name : ""); \
595 \
596 mutex_unlock(&input_dev->mutex); \
597 \
598 return retval; \
599} \
600static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL);
601
602INPUT_DEV_STRING_ATTR_SHOW(name);
603INPUT_DEV_STRING_ATTR_SHOW(phys);
604INPUT_DEV_STRING_ATTR_SHOW(uniq);
605
606static int input_print_modalias_bits(char *buf, int size,
607 char name, unsigned long *bm,
608 unsigned int min_bit, unsigned int max_bit)
609{
610 int len = 0, i;
611
612 len += snprintf(buf, max(size, 0), "%c", name);
613 for (i = min_bit; i < max_bit; i++)
614 if (bm[LONG(i)] & BIT(i))
615 len += snprintf(buf + len, max(size - len, 0), "%X,", i);
616 return len;
617}
618
619static int input_print_modalias(char *buf, int size, struct input_dev *id,
620 int add_cr)
621{
622 int len;
623
624 len = snprintf(buf, max(size, 0),
625 "input:b%04Xv%04Xp%04Xe%04X-",
626 id->id.bustype, id->id.vendor,
627 id->id.product, id->id.version);
628
629 len += input_print_modalias_bits(buf + len, size - len,
630 'e', id->evbit, 0, EV_MAX);
631 len += input_print_modalias_bits(buf + len, size - len,
632 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX);
633 len += input_print_modalias_bits(buf + len, size - len,
634 'r', id->relbit, 0, REL_MAX);
635 len += input_print_modalias_bits(buf + len, size - len,
636 'a', id->absbit, 0, ABS_MAX);
637 len += input_print_modalias_bits(buf + len, size - len,
638 'm', id->mscbit, 0, MSC_MAX);
639 len += input_print_modalias_bits(buf + len, size - len,
640 'l', id->ledbit, 0, LED_MAX);
641 len += input_print_modalias_bits(buf + len, size - len,
642 's', id->sndbit, 0, SND_MAX);
643 len += input_print_modalias_bits(buf + len, size - len,
644 'f', id->ffbit, 0, FF_MAX);
645 len += input_print_modalias_bits(buf + len, size - len,
646 'w', id->swbit, 0, SW_MAX);
647
648 if (add_cr)
649 len += snprintf(buf + len, max(size - len, 0), "\n");
650
651 return len;
652}
653
654static ssize_t input_dev_show_modalias(struct class_device *dev, char *buf)
655{
656 struct input_dev *id = to_input_dev(dev);
657 ssize_t len;
658
659 len = input_print_modalias(buf, PAGE_SIZE, id, 1);
660
661 return min_t(int, len, PAGE_SIZE);
662}
663static CLASS_DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL);
664
665static struct attribute *input_dev_attrs[] = {
666 &class_device_attr_name.attr,
667 &class_device_attr_phys.attr,
668 &class_device_attr_uniq.attr,
669 &class_device_attr_modalias.attr,
670 NULL
671};
672
673static struct attribute_group input_dev_attr_group = {
674 .attrs = input_dev_attrs,
675};
676
677#define INPUT_DEV_ID_ATTR(name) \
678static ssize_t input_dev_show_id_##name(struct class_device *dev, char *buf) \
679{ \
680 struct input_dev *input_dev = to_input_dev(dev); \
681 return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \
682} \
683static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL);
684
685INPUT_DEV_ID_ATTR(bustype);
686INPUT_DEV_ID_ATTR(vendor);
687INPUT_DEV_ID_ATTR(product);
688INPUT_DEV_ID_ATTR(version);
689
690static struct attribute *input_dev_id_attrs[] = {
691 &class_device_attr_bustype.attr,
692 &class_device_attr_vendor.attr,
693 &class_device_attr_product.attr,
694 &class_device_attr_version.attr,
695 NULL
696};
697
698static struct attribute_group input_dev_id_attr_group = {
699 .name = "id",
700 .attrs = input_dev_id_attrs,
701};
702
703static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap,
704 int max, int add_cr)
705{
706 int i;
707 int len = 0;
708
709 for (i = NBITS(max) - 1; i > 0; i--)
710 if (bitmap[i])
711 break;
712
713 for (; i >= 0; i--)
714 len += snprintf(buf + len, max(buf_size - len, 0),
715 "%lx%s", bitmap[i], i > 0 ? " " : "");
716
717 if (add_cr)
718 len += snprintf(buf + len, max(buf_size - len, 0), "\n");
719
720 return len;
721}
722
723#define INPUT_DEV_CAP_ATTR(ev, bm) \
724static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf) \
725{ \
726 struct input_dev *input_dev = to_input_dev(dev); \
727 int len = input_print_bitmap(buf, PAGE_SIZE, \
728 input_dev->bm##bit, ev##_MAX, 1); \
729 return min_t(int, len, PAGE_SIZE); \
730} \
731static CLASS_DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL);
732
733INPUT_DEV_CAP_ATTR(EV, ev);
734INPUT_DEV_CAP_ATTR(KEY, key);
735INPUT_DEV_CAP_ATTR(REL, rel);
736INPUT_DEV_CAP_ATTR(ABS, abs);
737INPUT_DEV_CAP_ATTR(MSC, msc);
738INPUT_DEV_CAP_ATTR(LED, led);
739INPUT_DEV_CAP_ATTR(SND, snd);
740INPUT_DEV_CAP_ATTR(FF, ff);
741INPUT_DEV_CAP_ATTR(SW, sw);
742
743static struct attribute *input_dev_caps_attrs[] = {
744 &class_device_attr_ev.attr,
745 &class_device_attr_key.attr,
746 &class_device_attr_rel.attr,
747 &class_device_attr_abs.attr,
748 &class_device_attr_msc.attr,
749 &class_device_attr_led.attr,
750 &class_device_attr_snd.attr,
751 &class_device_attr_ff.attr,
752 &class_device_attr_sw.attr,
753 NULL
754};
755
756static struct attribute_group input_dev_caps_attr_group = {
757 .name = "capabilities",
758 .attrs = input_dev_caps_attrs,
759};
760
761static void input_dev_release(struct class_device *class_dev)
762{
763 struct input_dev *dev = to_input_dev(class_dev);
764
765 kfree(dev);
766 module_put(THIS_MODULE);
767}
768
769
770
771
772
773static int input_add_uevent_bm_var(char **envp, int num_envp, int *cur_index,
774 char *buffer, int buffer_size, int *cur_len,
775 const char *name, unsigned long *bitmap, int max)
776{
777 if (*cur_index >= num_envp - 1)
778 return -ENOMEM;
779
780 envp[*cur_index] = buffer + *cur_len;
781
782 *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), name);
783 if (*cur_len >= buffer_size)
784 return -ENOMEM;
785
786 *cur_len += input_print_bitmap(buffer + *cur_len,
787 max(buffer_size - *cur_len, 0),
788 bitmap, max, 0) + 1;
789 if (*cur_len > buffer_size)
790 return -ENOMEM;
791
792 (*cur_index)++;
793 return 0;
794}
795
796static int input_add_uevent_modalias_var(char **envp, int num_envp, int *cur_index,
797 char *buffer, int buffer_size, int *cur_len,
798 struct input_dev *dev)
799{
800 if (*cur_index >= num_envp - 1)
801 return -ENOMEM;
802
803 envp[*cur_index] = buffer + *cur_len;
804
805 *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0),
806 "MODALIAS=");
807 if (*cur_len >= buffer_size)
808 return -ENOMEM;
809
810 *cur_len += input_print_modalias(buffer + *cur_len,
811 max(buffer_size - *cur_len, 0),
812 dev, 0) + 1;
813 if (*cur_len > buffer_size)
814 return -ENOMEM;
815
816 (*cur_index)++;
817 return 0;
818}
819
820#define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \
821 do { \
822 int err = add_uevent_var(envp, num_envp, &i, \
823 buffer, buffer_size, &len, \
824 fmt, val); \
825 if (err) \
826 return err; \
827 } while (0)
828
829#define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \
830 do { \
831 int err = input_add_uevent_bm_var(envp, num_envp, &i, \
832 buffer, buffer_size, &len, \
833 name, bm, max); \
834 if (err) \
835 return err; \
836 } while (0)
837
838#define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev) \
839 do { \
840 int err = input_add_uevent_modalias_var(envp, \
841 num_envp, &i, \
842 buffer, buffer_size, &len, \
843 dev); \
844 if (err) \
845 return err; \
846 } while (0)
847
848static int input_dev_uevent(struct class_device *cdev, char **envp,
849 int num_envp, char *buffer, int buffer_size)
850{
851 struct input_dev *dev = to_input_dev(cdev);
852 int i = 0;
853 int len = 0;
854
855 INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x",
856 dev->id.bustype, dev->id.vendor,
857 dev->id.product, dev->id.version);
858 if (dev->name)
859 INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name);
860 if (dev->phys)
861 INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys);
862 if (dev->uniq)
863 INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq);
864
865 INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX);
866 if (test_bit(EV_KEY, dev->evbit))
867 INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX);
868 if (test_bit(EV_REL, dev->evbit))
869 INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX);
870 if (test_bit(EV_ABS, dev->evbit))
871 INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX);
872 if (test_bit(EV_MSC, dev->evbit))
873 INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX);
874 if (test_bit(EV_LED, dev->evbit))
875 INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX);
876 if (test_bit(EV_SND, dev->evbit))
877 INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX);
878 if (test_bit(EV_FF, dev->evbit))
879 INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX);
880 if (test_bit(EV_SW, dev->evbit))
881 INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX);
882
883 INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev);
884
885 envp[i] = NULL;
886 return 0;
887}
888
889struct class input_class = {
890 .name = "input",
891 .release = input_dev_release,
892 .uevent = input_dev_uevent,
893};
894EXPORT_SYMBOL_GPL(input_class);
895
896struct input_dev *input_allocate_device(void)
897{
898 struct input_dev *dev;
899
900 dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL);
901 if (dev) {
902 dev->dynalloc = 1;
903 dev->cdev.class = &input_class;
904 class_device_initialize(&dev->cdev);
905 mutex_init(&dev->mutex);
906 INIT_LIST_HEAD(&dev->h_list);
907 INIT_LIST_HEAD(&dev->node);
908 }
909
910 return dev;
911}
912EXPORT_SYMBOL(input_allocate_device);
913
914void input_free_device(struct input_dev *dev)
915{
916 if (dev) {
917
918 mutex_lock(&dev->mutex);
919 dev->name = dev->phys = dev->uniq = NULL;
920 mutex_unlock(&dev->mutex);
921
922 input_put_device(dev);
923 }
924}
925EXPORT_SYMBOL(input_free_device);
926
927int input_register_device(struct input_dev *dev)
928{
929 static atomic_t input_no = ATOMIC_INIT(0);
930 struct input_handle *handle;
931 struct input_handler *handler;
932 struct input_device_id *id;
933 const char *path;
934 int error;
935
936 if (!dev->dynalloc) {
937 printk(KERN_WARNING "input: device %s is statically allocated, will not register\n"
938 "Please convert to input_allocate_device() or contact dtor_core@ameritech.net\n",
939 dev->name ? dev->name : "<Unknown>");
940 return -EINVAL;
941 }
942
943 set_bit(EV_SYN, dev->evbit);
944
945
946
947
948
949
950 init_timer(&dev->timer);
951 if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) {
952 dev->timer.data = (long) dev;
953 dev->timer.function = input_repeat_key;
954 dev->rep[REP_DELAY] = 250;
955 dev->rep[REP_PERIOD] = 33;
956 }
957
958 INIT_LIST_HEAD(&dev->h_list);
959 list_add_tail(&dev->node, &input_dev_list);
960
961 dev->cdev.class = &input_class;
962 snprintf(dev->cdev.class_id, sizeof(dev->cdev.class_id),
963 "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1);
964
965 error = class_device_add(&dev->cdev);
966 if (error)
967 return error;
968
969 error = sysfs_create_group(&dev->cdev.kobj, &input_dev_attr_group);
970 if (error)
971 goto fail1;
972
973 error = sysfs_create_group(&dev->cdev.kobj, &input_dev_id_attr_group);
974 if (error)
975 goto fail2;
976
977 error = sysfs_create_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
978 if (error)
979 goto fail3;
980
981 __module_get(THIS_MODULE);
982
983 path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL);
984 printk(KERN_INFO "input: %s as %s\n",
985 dev->name ? dev->name : "Unspecified device", path ? path : "N/A");
986 kfree(path);
987
988 list_for_each_entry(handler, &input_handler_list, node)
989 if (!handler->blacklist || !input_match_device(handler->blacklist, dev))
990 if ((id = input_match_device(handler->id_table, dev)))
991 if ((handle = handler->connect(handler, dev, id))) {
992 input_link_handle(handle);
993 if (handler->start)
994 handler->start(handle);
995 }
996
997 input_wakeup_procfs_readers();
998
999 return 0;
1000
1001 fail3: sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group);
1002 fail2: sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group);
1003 fail1: class_device_del(&dev->cdev);
1004 return error;
1005}
1006EXPORT_SYMBOL(input_register_device);
1007
1008void input_unregister_device(struct input_dev *dev)
1009{
1010 struct list_head *node, *next;
1011
1012 if (!dev)
1013 return;
1014
1015 del_timer_sync(&dev->timer);
1016
1017 list_for_each_safe(node, next, &dev->h_list) {
1018 struct input_handle * handle = to_handle(node);
1019 list_del_init(&handle->d_node);
1020 list_del_init(&handle->h_node);
1021 handle->handler->disconnect(handle);
1022 }
1023
1024 list_del_init(&dev->node);
1025
1026 sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group);
1027 sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group);
1028 sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group);
1029
1030 mutex_lock(&dev->mutex);
1031 dev->name = dev->phys = dev->uniq = NULL;
1032 mutex_unlock(&dev->mutex);
1033
1034 class_device_unregister(&dev->cdev);
1035
1036 input_wakeup_procfs_readers();
1037}
1038EXPORT_SYMBOL(input_unregister_device);
1039
1040void input_register_handler(struct input_handler *handler)
1041{
1042 struct input_dev *dev;
1043 struct input_handle *handle;
1044 struct input_device_id *id;
1045
1046 if (!handler)
1047 return;
1048
1049 INIT_LIST_HEAD(&handler->h_list);
1050
1051 if (handler->fops != NULL)
1052 input_table[handler->minor >> 5] = handler;
1053
1054 list_add_tail(&handler->node, &input_handler_list);
1055
1056 list_for_each_entry(dev, &input_dev_list, node)
1057 if (!handler->blacklist || !input_match_device(handler->blacklist, dev))
1058 if ((id = input_match_device(handler->id_table, dev)))
1059 if ((handle = handler->connect(handler, dev, id))) {
1060 input_link_handle(handle);
1061 if (handler->start)
1062 handler->start(handle);
1063 }
1064
1065 input_wakeup_procfs_readers();
1066}
1067EXPORT_SYMBOL(input_register_handler);
1068
1069void input_unregister_handler(struct input_handler *handler)
1070{
1071 struct list_head *node, *next;
1072
1073 list_for_each_safe(node, next, &handler->h_list) {
1074 struct input_handle * handle = to_handle_h(node);
1075 list_del_init(&handle->h_node);
1076 list_del_init(&handle->d_node);
1077 handler->disconnect(handle);
1078 }
1079
1080 list_del_init(&handler->node);
1081
1082 if (handler->fops != NULL)
1083 input_table[handler->minor >> 5] = NULL;
1084
1085 input_wakeup_procfs_readers();
1086}
1087EXPORT_SYMBOL(input_unregister_handler);
1088
1089static int input_open_file(struct inode *inode, struct file *file)
1090{
1091 struct input_handler *handler = input_table[iminor(inode) >> 5];
1092 const struct file_operations *old_fops, *new_fops = NULL;
1093 int err;
1094
1095
1096 if (!handler || !(new_fops = fops_get(handler->fops)))
1097 return -ENODEV;
1098
1099
1100
1101
1102
1103 if (!new_fops->open) {
1104 fops_put(new_fops);
1105 return -ENODEV;
1106 }
1107 old_fops = file->f_op;
1108 file->f_op = new_fops;
1109
1110 err = new_fops->open(inode, file);
1111
1112 if (err) {
1113 fops_put(file->f_op);
1114 file->f_op = fops_get(old_fops);
1115 }
1116 fops_put(old_fops);
1117 return err;
1118}
1119
1120static struct file_operations input_fops = {
1121 .owner = THIS_MODULE,
1122 .open = input_open_file,
1123};
1124
1125static int __init input_init(void)
1126{
1127 int err;
1128
1129 err = class_register(&input_class);
1130 if (err) {
1131 printk(KERN_ERR "input: unable to register input_dev class\n");
1132 return err;
1133 }
1134
1135 err = input_proc_init();
1136 if (err)
1137 goto fail1;
1138
1139 err = register_chrdev(INPUT_MAJOR, "input", &input_fops);
1140 if (err) {
1141 printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR);
1142 goto fail2;
1143 }
1144
1145 return 0;
1146
1147 fail2: input_proc_exit();
1148 fail1: class_unregister(&input_class);
1149 return err;
1150}
1151
1152static void __exit input_exit(void)
1153{
1154 input_proc_exit();
1155 unregister_chrdev(INPUT_MAJOR, "input");
1156 class_unregister(&input_class);
1157}
1158
1159subsys_initcall(input_init);
1160module_exit(input_exit);
1161
