projects/linux·blob v2.6.13 · refs

782 lines · 17.8 KiB

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#include <linux/devfs_fs_kernel.h>
26
27MODULE_AUTHOR("Vojtech Pavlik <[email protected]>");
28MODULE_DESCRIPTION("Input core");
29MODULE_LICENSE("GPL");
30
31EXPORT_SYMBOL(input_register_device);
32EXPORT_SYMBOL(input_unregister_device);
33EXPORT_SYMBOL(input_register_handler);
34EXPORT_SYMBOL(input_unregister_handler);
35EXPORT_SYMBOL(input_grab_device);
36EXPORT_SYMBOL(input_release_device);
37EXPORT_SYMBOL(input_open_device);
38EXPORT_SYMBOL(input_close_device);
39EXPORT_SYMBOL(input_accept_process);
40EXPORT_SYMBOL(input_flush_device);
41EXPORT_SYMBOL(input_event);
42EXPORT_SYMBOL(input_class);
43
44#define INPUT_DEVICES 256
45
46static LIST_HEAD(input_dev_list);
47static LIST_HEAD(input_handler_list);
48
49static struct input_handler *input_table[8];
50
51void 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_ABS:
93
94 if (code > ABS_MAX || !test_bit(code, dev->absbit))
95 return;
96
97 if (dev->absfuzz[code]) {
98 if ((value > dev->abs[code] - (dev->absfuzz[code] >> 1)) &&
99 (value < dev->abs[code] + (dev->absfuzz[code] >> 1)))
100 return;
101
102 if ((value > dev->abs[code] - dev->absfuzz[code]) &&
103 (value < dev->abs[code] + dev->absfuzz[code]))
104 value = (dev->abs[code] * 3 + value) >> 2;
105
106 if ((value > dev->abs[code] - (dev->absfuzz[code] << 1)) &&
107 (value < dev->abs[code] + (dev->absfuzz[code] << 1)))
108 value = (dev->abs[code] + value) >> 1;
109 }
110
111 if (dev->abs[code] == value)
112 return;
113
114 dev->abs[code] = value;
115 break;
116
117 case EV_REL:
118
119 if (code > REL_MAX || !test_bit(code, dev->relbit) || (value == 0))
120 return;
121
122 break;
123
124 case EV_MSC:
125
126 if (code > MSC_MAX || !test_bit(code, dev->mscbit))
127 return;
128
129 if (dev->event) dev->event(dev, type, code, value);
130
131 break;
132
133 case EV_LED:
134
135 if (code > LED_MAX || !test_bit(code, dev->ledbit) || !!test_bit(code, dev->led) == value)
136 return;
137
138 change_bit(code, dev->led);
139 if (dev->event) dev->event(dev, type, code, value);
140
141 break;
142
143 case EV_SND:
144
145 if (code > SND_MAX || !test_bit(code, dev->sndbit))
146 return;
147
148 if (dev->event) dev->event(dev, type, code, value);
149
150 break;
151
152 case EV_REP:
153
154 if (code > REP_MAX || value < 0 || dev->rep[code] == value) return;
155
156 dev->rep[code] = value;
157 if (dev->event) dev->event(dev, type, code, value);
158
159 break;
160
161 case EV_FF:
162 if (dev->event) dev->event(dev, type, code, value);
163 break;
164 }
165
166 if (type != EV_SYN)
167 dev->sync = 0;
168
169 if (dev->grab)
170 dev->grab->handler->event(dev->grab, type, code, value);
171 else
172 list_for_each_entry(handle, &dev->h_list, d_node)
173 if (handle->open)
174 handle->handler->event(handle, type, code, value);
175}
176
177static void input_repeat_key(unsigned long data)
178{
179 struct input_dev *dev = (void *) data;
180
181 if (!test_bit(dev->repeat_key, dev->key))
182 return;
183
184 input_event(dev, EV_KEY, dev->repeat_key, 2);
185 input_sync(dev);
186
187 if (dev->rep[REP_PERIOD])
188 mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_PERIOD]));
189}
190
191int input_accept_process(struct input_handle *handle, struct file *file)
192{
193 if (handle->dev->accept)
194 return handle->dev->accept(handle->dev, file);
195
196 return 0;
197}
198
199int input_grab_device(struct input_handle *handle)
200{
201 if (handle->dev->grab)
202 return -EBUSY;
203
204 handle->dev->grab = handle;
205 return 0;
206}
207
208void input_release_device(struct input_handle *handle)
209{
210 if (handle->dev->grab == handle)
211 handle->dev->grab = NULL;
212}
213
214int input_open_device(struct input_handle *handle)
215{
216 struct input_dev *dev = handle->dev;
217 int err;
218
219 err = down_interruptible(&dev->sem);
220 if (err)
221 return err;
222
223 handle->open++;
224
225 if (!dev->users++ && dev->open)
226 err = dev->open(dev);
227
228 if (err)
229 handle->open--;
230
231 up(&dev->sem);
232
233 return err;
234}
235
236int input_flush_device(struct input_handle* handle, struct file* file)
237{
238 if (handle->dev->flush)
239 return handle->dev->flush(handle->dev, file);
240
241 return 0;
242}
243
244void input_close_device(struct input_handle *handle)
245{
246 struct input_dev *dev = handle->dev;
247
248 input_release_device(handle);
249
250 down(&dev->sem);
251
252 if (!--dev->users && dev->close)
253 dev->close(dev);
254 handle->open--;
255
256 up(&dev->sem);
257}
258
259static void input_link_handle(struct input_handle *handle)
260{
261 list_add_tail(&handle->d_node, &handle->dev->h_list);
262 list_add_tail(&handle->h_node, &handle->handler->h_list);
263}
264
265#define MATCH_BIT(bit, max) \
266 for (i = 0; i < NBITS(max); i++) \
267 if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \
268 break; \
269 if (i != NBITS(max)) \
270 continue;
271
272static struct input_device_id *input_match_device(struct input_device_id *id, struct input_dev *dev)
273{
274 int i;
275
276 for (; id->flags || id->driver_info; id++) {
277
278 if (id->flags & INPUT_DEVICE_ID_MATCH_BUS)
279 if (id->id.bustype != dev->id.bustype)
280 continue;
281
282 if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR)
283 if (id->id.vendor != dev->id.vendor)
284 continue;
285
286 if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT)
287 if (id->id.product != dev->id.product)
288 continue;
289
290 if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION)
291 if (id->id.version != dev->id.version)
292 continue;
293
294 MATCH_BIT(evbit, EV_MAX);
295 MATCH_BIT(keybit, KEY_MAX);
296 MATCH_BIT(relbit, REL_MAX);
297 MATCH_BIT(absbit, ABS_MAX);
298 MATCH_BIT(mscbit, MSC_MAX);
299 MATCH_BIT(ledbit, LED_MAX);
300 MATCH_BIT(sndbit, SND_MAX);
301 MATCH_BIT(ffbit, FF_MAX);
302
303 return id;
304 }
305
306 return NULL;
307}
308
309
310/*
311 * Input hotplugging interface - loading event handlers based on
312 * device bitfields.
313 */
314
315#ifdef CONFIG_HOTPLUG
316
317/*
318 * Input hotplugging invokes what /proc/sys/kernel/hotplug says
319 * (normally /sbin/hotplug) when input devices get added or removed.
320 *
321 * This invokes a user mode policy agent, typically helping to load driver
322 * or other modules, configure the device, and more. Drivers can provide
323 * a MODULE_DEVICE_TABLE to help with module loading subtasks.
324 *
325 */
326
327#define SPRINTF_BIT_A(bit, name, max) \
328 do { \
329 envp[i++] = scratch; \
330 scratch += sprintf(scratch, name); \
331 for (j = NBITS(max) - 1; j >= 0; j--) \
332 if (dev->bit[j]) break; \
333 for (; j >= 0; j--) \
334 scratch += sprintf(scratch, "%lx ", dev->bit[j]); \
335 scratch++; \
336 } while (0)
337
338#define SPRINTF_BIT_A2(bit, name, max, ev) \
339 do { \
340 if (test_bit(ev, dev->evbit)) \
341 SPRINTF_BIT_A(bit, name, max); \
342 } while (0)
343
344static void input_call_hotplug(char *verb, struct input_dev *dev)
345{
346 char *argv[3], **envp, *buf, *scratch;
347 int i = 0, j, value;
348
349 if (!hotplug_path[0]) {
350 printk(KERN_ERR "input.c: calling hotplug without a hotplug agent defined\n");
351 return;
352 }
353 if (in_interrupt()) {
354 printk(KERN_ERR "input.c: calling hotplug from interrupt\n");
355 return;
356 }
357 if (!current->fs->root) {
358 printk(KERN_WARNING "input.c: calling hotplug without valid filesystem\n");
359 return;
360 }
361 if (!(envp = (char **) kmalloc(20 * sizeof(char *), GFP_KERNEL))) {
362 printk(KERN_ERR "input.c: not enough memory allocating hotplug environment\n");
363 return;
364 }
365 if (!(buf = kmalloc(1024, GFP_KERNEL))) {
366 kfree (envp);
367 printk(KERN_ERR "input.c: not enough memory allocating hotplug environment\n");
368 return;
369 }
370
371 argv[0] = hotplug_path;
372 argv[1] = "input";
373 argv[2] = NULL;
374
375 envp[i++] = "HOME=/";
376 envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
377
378 scratch = buf;
379
380 envp[i++] = scratch;
381 scratch += sprintf(scratch, "ACTION=%s", verb) + 1;
382
383 envp[i++] = scratch;
384 scratch += sprintf(scratch, "PRODUCT=%x/%x/%x/%x",
385 dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version) + 1;
386
387 if (dev->name) {
388 envp[i++] = scratch;
389 scratch += sprintf(scratch, "NAME=%s", dev->name) + 1;
390 }
391
392 if (dev->phys) {
393 envp[i++] = scratch;
394 scratch += sprintf(scratch, "PHYS=%s", dev->phys) + 1;
395 }
396
397 SPRINTF_BIT_A(evbit, "EV=", EV_MAX);
398 SPRINTF_BIT_A2(keybit, "KEY=", KEY_MAX, EV_KEY);
399 SPRINTF_BIT_A2(relbit, "REL=", REL_MAX, EV_REL);
400 SPRINTF_BIT_A2(absbit, "ABS=", ABS_MAX, EV_ABS);
401 SPRINTF_BIT_A2(mscbit, "MSC=", MSC_MAX, EV_MSC);
402 SPRINTF_BIT_A2(ledbit, "LED=", LED_MAX, EV_LED);
403 SPRINTF_BIT_A2(sndbit, "SND=", SND_MAX, EV_SND);
404 SPRINTF_BIT_A2(ffbit, "FF=", FF_MAX, EV_FF);
405
406 envp[i++] = NULL;
407
408#ifdef INPUT_DEBUG
409 printk(KERN_DEBUG "input.c: calling %s %s [%s %s %s %s %s]\n",
410 argv[0], argv[1], envp[0], envp[1], envp[2], envp[3], envp[4]);
411#endif
412
413 value = call_usermodehelper(argv [0], argv, envp, 0);
414
415 kfree(buf);
416 kfree(envp);
417
418#ifdef INPUT_DEBUG
419 if (value != 0)
420 printk(KERN_DEBUG "input.c: hotplug returned %d\n", value);
421#endif
422}
423
424#endif
425
426#ifdef CONFIG_PROC_FS
427
428static struct proc_dir_entry *proc_bus_input_dir;
429static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait);
430static int input_devices_state;
431
432static inline void input_wakeup_procfs_readers(void)
433{
434 input_devices_state++;
435 wake_up(&input_devices_poll_wait);
436}
437
438static unsigned int input_devices_poll(struct file *file, poll_table *wait)
439{
440 int state = input_devices_state;
441 poll_wait(file, &input_devices_poll_wait, wait);
442 if (state != input_devices_state)
443 return POLLIN | POLLRDNORM;
444 return 0;
445}
446
447#define SPRINTF_BIT_B(bit, name, max) \
448 do { \
449 len += sprintf(buf + len, "B: %s", name); \
450 for (i = NBITS(max) - 1; i >= 0; i--) \
451 if (dev->bit[i]) break; \
452 for (; i >= 0; i--) \
453 len += sprintf(buf + len, "%lx ", dev->bit[i]); \
454 len += sprintf(buf + len, "\n"); \
455 } while (0)
456
457#define SPRINTF_BIT_B2(bit, name, max, ev) \
458 do { \
459 if (test_bit(ev, dev->evbit)) \
460 SPRINTF_BIT_B(bit, name, max); \
461 } while (0)
462
463static int input_devices_read(char *buf, char **start, off_t pos, int count, int *eof, void *data)
464{
465 struct input_dev *dev;
466 struct input_handle *handle;
467
468 off_t at = 0;
469 int i, len, cnt = 0;
470
471 list_for_each_entry(dev, &input_dev_list, node) {
472
473 len = sprintf(buf, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n",
474 dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version);
475
476 len += sprintf(buf + len, "N: Name=\"%s\"\n", dev->name ? dev->name : "");
477 len += sprintf(buf + len, "P: Phys=%s\n", dev->phys ? dev->phys : "");
478 len += sprintf(buf + len, "H: Handlers=");
479
480 list_for_each_entry(handle, &dev->h_list, d_node)
481 len += sprintf(buf + len, "%s ", handle->name);
482
483 len += sprintf(buf + len, "\n");
484
485 SPRINTF_BIT_B(evbit, "EV=", EV_MAX);
486 SPRINTF_BIT_B2(keybit, "KEY=", KEY_MAX, EV_KEY);
487 SPRINTF_BIT_B2(relbit, "REL=", REL_MAX, EV_REL);
488 SPRINTF_BIT_B2(absbit, "ABS=", ABS_MAX, EV_ABS);
489 SPRINTF_BIT_B2(mscbit, "MSC=", MSC_MAX, EV_MSC);
490 SPRINTF_BIT_B2(ledbit, "LED=", LED_MAX, EV_LED);
491 SPRINTF_BIT_B2(sndbit, "SND=", SND_MAX, EV_SND);
492 SPRINTF_BIT_B2(ffbit, "FF=", FF_MAX, EV_FF);
493
494 len += sprintf(buf + len, "\n");
495
496 at += len;
497
498 if (at >= pos) {
499 if (!*start) {
500 *start = buf + (pos - (at - len));
501 cnt = at - pos;
502 } else cnt += len;
503 buf += len;
504 if (cnt >= count)
505 break;
506 }
507 }
508
509 if (&dev->node == &input_dev_list)
510 *eof = 1;
511
512 return (count > cnt) ? cnt : count;
513}
514
515static int input_handlers_read(char *buf, char **start, off_t pos, int count, int *eof, void *data)
516{
517 struct input_handler *handler;
518
519 off_t at = 0;
520 int len = 0, cnt = 0;
521 int i = 0;
522
523 list_for_each_entry(handler, &input_handler_list, node) {
524
525 if (handler->fops)
526 len = sprintf(buf, "N: Number=%d Name=%s Minor=%d\n",
527 i++, handler->name, handler->minor);
528 else
529 len = sprintf(buf, "N: Number=%d Name=%s\n",
530 i++, handler->name);
531
532 at += len;
533
534 if (at >= pos) {
535 if (!*start) {
536 *start = buf + (pos - (at - len));
537 cnt = at - pos;
538 } else cnt += len;
539 buf += len;
540 if (cnt >= count)
541 break;
542 }
543 }
544 if (&handler->node == &input_handler_list)
545 *eof = 1;
546
547 return (count > cnt) ? cnt : count;
548}
549
550static struct file_operations input_fileops;
551
552static int __init input_proc_init(void)
553{
554 struct proc_dir_entry *entry;
555
556 proc_bus_input_dir = proc_mkdir("input", proc_bus);
557 if (!proc_bus_input_dir)
558 return -ENOMEM;
559
560 proc_bus_input_dir->owner = THIS_MODULE;
561
562 entry = create_proc_read_entry("devices", 0, proc_bus_input_dir, input_devices_read, NULL);
563 if (!entry)
564 goto fail1;
565
566 entry->owner = THIS_MODULE;
567 input_fileops = *entry->proc_fops;
568 entry->proc_fops = &input_fileops;
569 entry->proc_fops->poll = input_devices_poll;
570
571 entry = create_proc_read_entry("handlers", 0, proc_bus_input_dir, input_handlers_read, NULL);
572 if (!entry)
573 goto fail2;
574
575 entry->owner = THIS_MODULE;
576
577 return 0;
578
579 fail2: remove_proc_entry("devices", proc_bus_input_dir);
580 fail1: remove_proc_entry("input", proc_bus);
581 return -ENOMEM;
582}
583
584static void input_proc_exit(void)
585{
586 remove_proc_entry("devices", proc_bus_input_dir);
587 remove_proc_entry("handlers", proc_bus_input_dir);
588 remove_proc_entry("input", proc_bus);
589}
590
591#else /* !CONFIG_PROC_FS */
592static inline void input_wakeup_procfs_readers(void) { }
593static inline int input_proc_init(void) { return 0; }
594static inline void input_proc_exit(void) { }
595#endif
596
597void input_register_device(struct input_dev *dev)
598{
599 struct input_handle *handle;
600 struct input_handler *handler;
601 struct input_device_id *id;
602
603 set_bit(EV_SYN, dev->evbit);
604
605 init_MUTEX(&dev->sem);
606
607 /*
608 * If delay and period are pre-set by the driver, then autorepeating
609 * is handled by the driver itself and we don't do it in input.c.
610 */
611
612 init_timer(&dev->timer);
613 if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) {
614 dev->timer.data = (long) dev;
615 dev->timer.function = input_repeat_key;
616 dev->rep[REP_DELAY] = 250;
617 dev->rep[REP_PERIOD] = 33;
618 }
619
620 INIT_LIST_HEAD(&dev->h_list);
621 list_add_tail(&dev->node, &input_dev_list);
622
623 list_for_each_entry(handler, &input_handler_list, node)
624 if (!handler->blacklist || !input_match_device(handler->blacklist, dev))
625 if ((id = input_match_device(handler->id_table, dev)))
626 if ((handle = handler->connect(handler, dev, id)))
627 input_link_handle(handle);
628
629#ifdef CONFIG_HOTPLUG
630 input_call_hotplug("add", dev);
631#endif
632
633 input_wakeup_procfs_readers();
634}
635
636void input_unregister_device(struct input_dev *dev)
637{
638 struct list_head * node, * next;
639
640 if (!dev) return;
641
642 del_timer_sync(&dev->timer);
643
644 list_for_each_safe(node, next, &dev->h_list) {
645 struct input_handle * handle = to_handle(node);
646 list_del_init(&handle->d_node);
647 list_del_init(&handle->h_node);
648 handle->handler->disconnect(handle);
649 }
650
651#ifdef CONFIG_HOTPLUG
652 input_call_hotplug("remove", dev);
653#endif
654
655 list_del_init(&dev->node);
656
657 input_wakeup_procfs_readers();
658}
659
660void input_register_handler(struct input_handler *handler)
661{
662 struct input_dev *dev;
663 struct input_handle *handle;
664 struct input_device_id *id;
665
666 if (!handler) return;
667
668 INIT_LIST_HEAD(&handler->h_list);
669
670 if (handler->fops != NULL)
671 input_table[handler->minor >> 5] = handler;
672
673 list_add_tail(&handler->node, &input_handler_list);
674
675 list_for_each_entry(dev, &input_dev_list, node)
676 if (!handler->blacklist || !input_match_device(handler->blacklist, dev))
677 if ((id = input_match_device(handler->id_table, dev)))
678 if ((handle = handler->connect(handler, dev, id)))
679 input_link_handle(handle);
680
681 input_wakeup_procfs_readers();
682}
683
684void input_unregister_handler(struct input_handler *handler)
685{
686 struct list_head * node, * next;
687
688 list_for_each_safe(node, next, &handler->h_list) {
689 struct input_handle * handle = to_handle_h(node);
690 list_del_init(&handle->h_node);
691 list_del_init(&handle->d_node);
692 handler->disconnect(handle);
693 }
694
695 list_del_init(&handler->node);
696
697 if (handler->fops != NULL)
698 input_table[handler->minor >> 5] = NULL;
699
700 input_wakeup_procfs_readers();
701}
702
703static int input_open_file(struct inode *inode, struct file *file)
704{
705 struct input_handler *handler = input_table[iminor(inode) >> 5];
706 struct file_operations *old_fops, *new_fops = NULL;
707 int err;
708
709 /* No load-on-demand here? */
710 if (!handler || !(new_fops = fops_get(handler->fops)))
711 return -ENODEV;
712
713 /*
714 * That's _really_ odd. Usually NULL ->open means "nothing special",
715 * not "no device". Oh, well...
716 */
717 if (!new_fops->open) {
718 fops_put(new_fops);
719 return -ENODEV;
720 }
721 old_fops = file->f_op;
722 file->f_op = new_fops;
723
724 err = new_fops->open(inode, file);
725
726 if (err) {
727 fops_put(file->f_op);
728 file->f_op = fops_get(old_fops);
729 }
730 fops_put(old_fops);
731 return err;
732}
733
734static struct file_operations input_fops = {
735 .owner = THIS_MODULE,
736 .open = input_open_file,
737};
738
739struct class *input_class;
740
741static int __init input_init(void)
742{
743 int err;
744
745 input_class = class_create(THIS_MODULE, "input");
746 if (IS_ERR(input_class)) {
747 printk(KERN_ERR "input: unable to register input class\n");
748 return PTR_ERR(input_class);
749 }
750
751 err = input_proc_init();
752 if (err)
753 goto fail1;
754
755 err = register_chrdev(INPUT_MAJOR, "input", &input_fops);
756 if (err) {
757 printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR);
758 goto fail2;
759 }
760
761 err = devfs_mk_dir("input");
762 if (err)
763 goto fail3;
764
765 return 0;
766
767 fail3: unregister_chrdev(INPUT_MAJOR, "input");
768 fail2: input_proc_exit();
769 fail1: class_destroy(input_class);
770 return err;
771}
772
773static void __exit input_exit(void)
774{
775 input_proc_exit();
776 devfs_remove("input");
777 unregister_chrdev(INPUT_MAJOR, "input");
778 class_destroy(input_class);
779}
780
781subsys_initcall(input_init);
782module_exit(input_exit);