2 * Event char devices, giving access to raw input device events.
4 * Copyright (c) 1999-2002 Vojtech Pavlik
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13 #define EVDEV_MINOR_BASE 64
14 #define EVDEV_MINORS 32
15 #define EVDEV_MIN_BUFFER_SIZE 64U
16 #define EVDEV_BUF_PACKETS 8
18 #include <linux/poll.h>
19 #include <linux/sched.h>
20 #include <linux/slab.h>
21 #include <linux/vmalloc.h>
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/input/mt.h>
26 #include <linux/major.h>
27 #include <linux/device.h>
28 #include <linux/cdev.h>
29 #include "input-compat.h"
33 struct input_handle handle;
34 wait_queue_head_t wait;
35 struct evdev_client __rcu *grab;
36 struct list_head client_list;
37 spinlock_t client_lock; /* protects client_list */
47 unsigned int packet_head; /* [future] position of the first element of next packet */
48 spinlock_t buffer_lock; /* protects access to buffer, head and tail */
49 struct fasync_struct *fasync;
51 struct list_head node;
54 struct input_event buffer[];
57 static void __pass_event(struct evdev_client *client,
58 const struct input_event *event)
60 client->buffer[client->head++] = *event;
61 client->head &= client->bufsize - 1;
63 if (unlikely(client->head == client->tail)) {
65 * This effectively "drops" all unconsumed events, leaving
66 * EV_SYN/SYN_DROPPED plus the newest event in the queue.
68 client->tail = (client->head - 2) & (client->bufsize - 1);
70 client->buffer[client->tail].time = event->time;
71 client->buffer[client->tail].type = EV_SYN;
72 client->buffer[client->tail].code = SYN_DROPPED;
73 client->buffer[client->tail].value = 0;
75 client->packet_head = client->tail;
78 if (event->type == EV_SYN && event->code == SYN_REPORT) {
79 client->packet_head = client->head;
80 kill_fasync(&client->fasync, SIGIO, POLL_IN);
84 static void evdev_pass_values(struct evdev_client *client,
85 const struct input_value *vals, unsigned int count,
86 ktime_t mono, ktime_t real)
88 struct evdev *evdev = client->evdev;
89 const struct input_value *v;
90 struct input_event event;
93 event.time = ktime_to_timeval(client->clkid == CLOCK_MONOTONIC ?
96 /* Interrupts are disabled, just acquire the lock. */
97 spin_lock(&client->buffer_lock);
99 for (v = vals; v != vals + count; v++) {
100 event.type = v->type;
101 event.code = v->code;
102 event.value = v->value;
103 __pass_event(client, &event);
104 if (v->type == EV_SYN && v->code == SYN_REPORT)
108 spin_unlock(&client->buffer_lock);
111 wake_up_interruptible(&evdev->wait);
115 * Pass incoming events to all connected clients.
117 static void evdev_events(struct input_handle *handle,
118 const struct input_value *vals, unsigned int count)
120 struct evdev *evdev = handle->private;
121 struct evdev_client *client;
122 ktime_t time_mono, time_real;
124 time_mono = ktime_get();
125 time_real = ktime_sub(time_mono, ktime_get_monotonic_offset());
129 client = rcu_dereference(evdev->grab);
132 evdev_pass_values(client, vals, count, time_mono, time_real);
134 list_for_each_entry_rcu(client, &evdev->client_list, node)
135 evdev_pass_values(client, vals, count,
136 time_mono, time_real);
142 * Pass incoming event to all connected clients.
144 static void evdev_event(struct input_handle *handle,
145 unsigned int type, unsigned int code, int value)
147 struct input_value vals[] = { { type, code, value } };
149 evdev_events(handle, vals, 1);
152 static int evdev_fasync(int fd, struct file *file, int on)
154 struct evdev_client *client = file->private_data;
156 return fasync_helper(fd, file, on, &client->fasync);
159 static int evdev_flush(struct file *file, fl_owner_t id)
161 struct evdev_client *client = file->private_data;
162 struct evdev *evdev = client->evdev;
165 retval = mutex_lock_interruptible(&evdev->mutex);
172 retval = input_flush_device(&evdev->handle, file);
174 mutex_unlock(&evdev->mutex);
178 static void evdev_free(struct device *dev)
180 struct evdev *evdev = container_of(dev, struct evdev, dev);
182 input_put_device(evdev->handle.dev);
187 * Grabs an event device (along with underlying input device).
188 * This function is called with evdev->mutex taken.
190 static int evdev_grab(struct evdev *evdev, struct evdev_client *client)
197 error = input_grab_device(&evdev->handle);
201 rcu_assign_pointer(evdev->grab, client);
206 static int evdev_ungrab(struct evdev *evdev, struct evdev_client *client)
208 struct evdev_client *grab = rcu_dereference_protected(evdev->grab,
209 lockdep_is_held(&evdev->mutex));
214 rcu_assign_pointer(evdev->grab, NULL);
216 input_release_device(&evdev->handle);
221 static void evdev_attach_client(struct evdev *evdev,
222 struct evdev_client *client)
224 spin_lock(&evdev->client_lock);
225 list_add_tail_rcu(&client->node, &evdev->client_list);
226 spin_unlock(&evdev->client_lock);
229 static void evdev_detach_client(struct evdev *evdev,
230 struct evdev_client *client)
232 spin_lock(&evdev->client_lock);
233 list_del_rcu(&client->node);
234 spin_unlock(&evdev->client_lock);
238 static int evdev_open_device(struct evdev *evdev)
242 retval = mutex_lock_interruptible(&evdev->mutex);
248 else if (!evdev->open++) {
249 retval = input_open_device(&evdev->handle);
254 mutex_unlock(&evdev->mutex);
258 static void evdev_close_device(struct evdev *evdev)
260 mutex_lock(&evdev->mutex);
262 if (evdev->exist && !--evdev->open)
263 input_close_device(&evdev->handle);
265 mutex_unlock(&evdev->mutex);
269 * Wake up users waiting for IO so they can disconnect from
272 static void evdev_hangup(struct evdev *evdev)
274 struct evdev_client *client;
276 spin_lock(&evdev->client_lock);
277 list_for_each_entry(client, &evdev->client_list, node)
278 kill_fasync(&client->fasync, SIGIO, POLL_HUP);
279 spin_unlock(&evdev->client_lock);
281 wake_up_interruptible(&evdev->wait);
284 static int evdev_release(struct inode *inode, struct file *file)
286 struct evdev_client *client = file->private_data;
287 struct evdev *evdev = client->evdev;
289 mutex_lock(&evdev->mutex);
290 evdev_ungrab(evdev, client);
291 mutex_unlock(&evdev->mutex);
293 evdev_detach_client(evdev, client);
295 if (is_vmalloc_addr(client))
300 evdev_close_device(evdev);
305 static unsigned int evdev_compute_buffer_size(struct input_dev *dev)
307 unsigned int n_events =
308 max(dev->hint_events_per_packet * EVDEV_BUF_PACKETS,
309 EVDEV_MIN_BUFFER_SIZE);
311 return roundup_pow_of_two(n_events);
314 static int evdev_open(struct inode *inode, struct file *file)
316 struct evdev *evdev = container_of(inode->i_cdev, struct evdev, cdev);
317 unsigned int bufsize = evdev_compute_buffer_size(evdev->handle.dev);
318 unsigned int size = sizeof(struct evdev_client) +
319 bufsize * sizeof(struct input_event);
320 struct evdev_client *client;
323 client = kzalloc(size, GFP_KERNEL | __GFP_NOWARN);
325 client = vzalloc(size);
329 client->bufsize = bufsize;
330 spin_lock_init(&client->buffer_lock);
331 client->evdev = evdev;
332 evdev_attach_client(evdev, client);
334 error = evdev_open_device(evdev);
336 goto err_free_client;
338 file->private_data = client;
339 nonseekable_open(inode, file);
344 evdev_detach_client(evdev, client);
349 static ssize_t evdev_write(struct file *file, const char __user *buffer,
350 size_t count, loff_t *ppos)
352 struct evdev_client *client = file->private_data;
353 struct evdev *evdev = client->evdev;
354 struct input_event event;
357 if (count != 0 && count < input_event_size())
360 retval = mutex_lock_interruptible(&evdev->mutex);
369 while (retval + input_event_size() <= count) {
371 if (input_event_from_user(buffer + retval, &event)) {
375 retval += input_event_size();
377 input_inject_event(&evdev->handle,
378 event.type, event.code, event.value);
382 mutex_unlock(&evdev->mutex);
386 static int evdev_fetch_next_event(struct evdev_client *client,
387 struct input_event *event)
391 spin_lock_irq(&client->buffer_lock);
393 have_event = client->packet_head != client->tail;
395 *event = client->buffer[client->tail++];
396 client->tail &= client->bufsize - 1;
399 spin_unlock_irq(&client->buffer_lock);
404 static ssize_t evdev_read(struct file *file, char __user *buffer,
405 size_t count, loff_t *ppos)
407 struct evdev_client *client = file->private_data;
408 struct evdev *evdev = client->evdev;
409 struct input_event event;
413 if (count != 0 && count < input_event_size())
420 if (client->packet_head == client->tail &&
421 (file->f_flags & O_NONBLOCK))
425 * count == 0 is special - no IO is done but we check
426 * for error conditions (see above).
431 while (read + input_event_size() <= count &&
432 evdev_fetch_next_event(client, &event)) {
434 if (input_event_to_user(buffer + read, &event))
437 read += input_event_size();
443 if (!(file->f_flags & O_NONBLOCK)) {
444 error = wait_event_interruptible(evdev->wait,
445 client->packet_head != client->tail ||
455 /* No kernel lock - fine */
456 static unsigned int evdev_poll(struct file *file, poll_table *wait)
458 struct evdev_client *client = file->private_data;
459 struct evdev *evdev = client->evdev;
462 poll_wait(file, &evdev->wait, wait);
464 mask = evdev->exist ? POLLOUT | POLLWRNORM : POLLHUP | POLLERR;
465 if (client->packet_head != client->tail)
466 mask |= POLLIN | POLLRDNORM;
473 #define BITS_PER_LONG_COMPAT (sizeof(compat_long_t) * 8)
474 #define BITS_TO_LONGS_COMPAT(x) ((((x) - 1) / BITS_PER_LONG_COMPAT) + 1)
477 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
478 unsigned int maxlen, void __user *p, int compat)
483 len = BITS_TO_LONGS_COMPAT(maxbit) * sizeof(compat_long_t);
487 for (i = 0; i < len / sizeof(compat_long_t); i++)
488 if (copy_to_user((compat_long_t __user *) p + i,
489 (compat_long_t *) bits +
490 i + 1 - ((i % 2) << 1),
491 sizeof(compat_long_t)))
494 len = BITS_TO_LONGS(maxbit) * sizeof(long);
498 if (copy_to_user(p, bits, len))
505 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
506 unsigned int maxlen, void __user *p, int compat)
509 BITS_TO_LONGS_COMPAT(maxbit) * sizeof(compat_long_t) :
510 BITS_TO_LONGS(maxbit) * sizeof(long);
515 return copy_to_user(p, bits, len) ? -EFAULT : len;
517 #endif /* __BIG_ENDIAN */
521 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
522 unsigned int maxlen, void __user *p, int compat)
524 int len = BITS_TO_LONGS(maxbit) * sizeof(long);
529 return copy_to_user(p, bits, len) ? -EFAULT : len;
532 #endif /* CONFIG_COMPAT */
534 static int str_to_user(const char *str, unsigned int maxlen, void __user *p)
541 len = strlen(str) + 1;
545 return copy_to_user(p, str, len) ? -EFAULT : len;
548 #define OLD_KEY_MAX 0x1ff
549 static int handle_eviocgbit(struct input_dev *dev,
550 unsigned int type, unsigned int size,
551 void __user *p, int compat_mode)
553 static unsigned long keymax_warn_time;
559 case 0: bits = dev->evbit; len = EV_MAX; break;
560 case EV_KEY: bits = dev->keybit; len = KEY_MAX; break;
561 case EV_REL: bits = dev->relbit; len = REL_MAX; break;
562 case EV_ABS: bits = dev->absbit; len = ABS_MAX; break;
563 case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break;
564 case EV_LED: bits = dev->ledbit; len = LED_MAX; break;
565 case EV_SND: bits = dev->sndbit; len = SND_MAX; break;
566 case EV_FF: bits = dev->ffbit; len = FF_MAX; break;
567 case EV_SW: bits = dev->swbit; len = SW_MAX; break;
568 default: return -EINVAL;
572 * Work around bugs in userspace programs that like to do
573 * EVIOCGBIT(EV_KEY, KEY_MAX) and not realize that 'len'
574 * should be in bytes, not in bits.
576 if (type == EV_KEY && size == OLD_KEY_MAX) {
578 if (printk_timed_ratelimit(&keymax_warn_time, 10 * 1000))
579 pr_warning("(EVIOCGBIT): Suspicious buffer size %u, "
580 "limiting output to %zu bytes. See "
581 "http://userweb.kernel.org/~dtor/eviocgbit-bug.html\n",
583 BITS_TO_LONGS(OLD_KEY_MAX) * sizeof(long));
586 return bits_to_user(bits, len, size, p, compat_mode);
590 static int evdev_handle_get_keycode(struct input_dev *dev, void __user *p)
592 struct input_keymap_entry ke = {
593 .len = sizeof(unsigned int),
596 int __user *ip = (int __user *)p;
600 if (copy_from_user(ke.scancode, p, sizeof(unsigned int)))
603 error = input_get_keycode(dev, &ke);
607 if (put_user(ke.keycode, ip + 1))
613 static int evdev_handle_get_keycode_v2(struct input_dev *dev, void __user *p)
615 struct input_keymap_entry ke;
618 if (copy_from_user(&ke, p, sizeof(ke)))
621 error = input_get_keycode(dev, &ke);
625 if (copy_to_user(p, &ke, sizeof(ke)))
631 static int evdev_handle_set_keycode(struct input_dev *dev, void __user *p)
633 struct input_keymap_entry ke = {
634 .len = sizeof(unsigned int),
637 int __user *ip = (int __user *)p;
639 if (copy_from_user(ke.scancode, p, sizeof(unsigned int)))
642 if (get_user(ke.keycode, ip + 1))
645 return input_set_keycode(dev, &ke);
648 static int evdev_handle_set_keycode_v2(struct input_dev *dev, void __user *p)
650 struct input_keymap_entry ke;
652 if (copy_from_user(&ke, p, sizeof(ke)))
655 if (ke.len > sizeof(ke.scancode))
658 return input_set_keycode(dev, &ke);
661 static int evdev_handle_mt_request(struct input_dev *dev,
665 const struct input_mt *mt = dev->mt;
670 if (get_user(code, &ip[0]))
672 if (!mt || !input_is_mt_value(code))
675 max_slots = (size - sizeof(__u32)) / sizeof(__s32);
676 for (i = 0; i < mt->num_slots && i < max_slots; i++) {
677 int value = input_mt_get_value(&mt->slots[i], code);
678 if (put_user(value, &ip[1 + i]))
685 static long evdev_do_ioctl(struct file *file, unsigned int cmd,
686 void __user *p, int compat_mode)
688 struct evdev_client *client = file->private_data;
689 struct evdev *evdev = client->evdev;
690 struct input_dev *dev = evdev->handle.dev;
691 struct input_absinfo abs;
692 struct ff_effect effect;
693 int __user *ip = (int __user *)p;
694 unsigned int i, t, u, v;
698 /* First we check for fixed-length commands */
702 return put_user(EV_VERSION, ip);
705 if (copy_to_user(p, &dev->id, sizeof(struct input_id)))
710 if (!test_bit(EV_REP, dev->evbit))
712 if (put_user(dev->rep[REP_DELAY], ip))
714 if (put_user(dev->rep[REP_PERIOD], ip + 1))
719 if (!test_bit(EV_REP, dev->evbit))
723 if (get_user(v, ip + 1))
726 input_inject_event(&evdev->handle, EV_REP, REP_DELAY, u);
727 input_inject_event(&evdev->handle, EV_REP, REP_PERIOD, v);
732 return input_ff_erase(dev, (int)(unsigned long) p, file);
735 i = test_bit(EV_FF, dev->evbit) ?
736 dev->ff->max_effects : 0;
743 return evdev_grab(evdev, client);
745 return evdev_ungrab(evdev, client);
748 if (copy_from_user(&i, p, sizeof(unsigned int)))
750 if (i != CLOCK_MONOTONIC && i != CLOCK_REALTIME)
756 return evdev_handle_get_keycode(dev, p);
759 return evdev_handle_set_keycode(dev, p);
761 case EVIOCGKEYCODE_V2:
762 return evdev_handle_get_keycode_v2(dev, p);
764 case EVIOCSKEYCODE_V2:
765 return evdev_handle_set_keycode_v2(dev, p);
768 size = _IOC_SIZE(cmd);
770 /* Now check variable-length commands */
771 #define EVIOC_MASK_SIZE(nr) ((nr) & ~(_IOC_SIZEMASK << _IOC_SIZESHIFT))
772 switch (EVIOC_MASK_SIZE(cmd)) {
775 return bits_to_user(dev->propbit, INPUT_PROP_MAX,
776 size, p, compat_mode);
778 case EVIOCGMTSLOTS(0):
779 return evdev_handle_mt_request(dev, size, ip);
782 return bits_to_user(dev->key, KEY_MAX, size, p, compat_mode);
785 return bits_to_user(dev->led, LED_MAX, size, p, compat_mode);
788 return bits_to_user(dev->snd, SND_MAX, size, p, compat_mode);
791 return bits_to_user(dev->sw, SW_MAX, size, p, compat_mode);
794 return str_to_user(dev->name, size, p);
797 return str_to_user(dev->phys, size, p);
800 return str_to_user(dev->uniq, size, p);
802 case EVIOC_MASK_SIZE(EVIOCSFF):
803 if (input_ff_effect_from_user(p, size, &effect))
806 error = input_ff_upload(dev, &effect, file);
808 if (put_user(effect.id, &(((struct ff_effect __user *)p)->id)))
814 /* Multi-number variable-length handlers */
815 if (_IOC_TYPE(cmd) != 'E')
818 if (_IOC_DIR(cmd) == _IOC_READ) {
820 if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0, 0)))
821 return handle_eviocgbit(dev,
822 _IOC_NR(cmd) & EV_MAX, size,
825 if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) {
830 t = _IOC_NR(cmd) & ABS_MAX;
831 abs = dev->absinfo[t];
833 if (copy_to_user(p, &abs, min_t(size_t,
834 size, sizeof(struct input_absinfo))))
841 if (_IOC_DIR(cmd) == _IOC_WRITE) {
843 if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) {
848 t = _IOC_NR(cmd) & ABS_MAX;
850 if (copy_from_user(&abs, p, min_t(size_t,
851 size, sizeof(struct input_absinfo))))
854 if (size < sizeof(struct input_absinfo))
857 /* We can't change number of reserved MT slots */
858 if (t == ABS_MT_SLOT)
862 * Take event lock to ensure that we are not
863 * changing device parameters in the middle
866 spin_lock_irq(&dev->event_lock);
867 dev->absinfo[t] = abs;
868 spin_unlock_irq(&dev->event_lock);
877 static long evdev_ioctl_handler(struct file *file, unsigned int cmd,
878 void __user *p, int compat_mode)
880 struct evdev_client *client = file->private_data;
881 struct evdev *evdev = client->evdev;
884 retval = mutex_lock_interruptible(&evdev->mutex);
893 retval = evdev_do_ioctl(file, cmd, p, compat_mode);
896 mutex_unlock(&evdev->mutex);
900 static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
902 return evdev_ioctl_handler(file, cmd, (void __user *)arg, 0);
906 static long evdev_ioctl_compat(struct file *file,
907 unsigned int cmd, unsigned long arg)
909 return evdev_ioctl_handler(file, cmd, compat_ptr(arg), 1);
913 static const struct file_operations evdev_fops = {
914 .owner = THIS_MODULE,
916 .write = evdev_write,
919 .release = evdev_release,
920 .unlocked_ioctl = evdev_ioctl,
922 .compat_ioctl = evdev_ioctl_compat,
924 .fasync = evdev_fasync,
925 .flush = evdev_flush,
930 * Mark device non-existent. This disables writes, ioctls and
931 * prevents new users from opening the device. Already posted
932 * blocking reads will stay, however new ones will fail.
934 static void evdev_mark_dead(struct evdev *evdev)
936 mutex_lock(&evdev->mutex);
937 evdev->exist = false;
938 mutex_unlock(&evdev->mutex);
941 static void evdev_cleanup(struct evdev *evdev)
943 struct input_handle *handle = &evdev->handle;
945 evdev_mark_dead(evdev);
948 cdev_del(&evdev->cdev);
950 /* evdev is marked dead so no one else accesses evdev->open */
952 input_flush_device(handle, NULL);
953 input_close_device(handle);
958 * Create new evdev device. Note that input core serializes calls
959 * to connect and disconnect.
961 static int evdev_connect(struct input_handler *handler, struct input_dev *dev,
962 const struct input_device_id *id)
969 minor = input_get_new_minor(EVDEV_MINOR_BASE, EVDEV_MINORS, true);
972 pr_err("failed to reserve new minor: %d\n", error);
976 evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL);
982 INIT_LIST_HEAD(&evdev->client_list);
983 spin_lock_init(&evdev->client_lock);
984 mutex_init(&evdev->mutex);
985 init_waitqueue_head(&evdev->wait);
989 /* Normalize device number if it falls into legacy range */
990 if (dev_no < EVDEV_MINOR_BASE + EVDEV_MINORS)
991 dev_no -= EVDEV_MINOR_BASE;
992 dev_set_name(&evdev->dev, "event%d", dev_no);
994 evdev->handle.dev = input_get_device(dev);
995 evdev->handle.name = dev_name(&evdev->dev);
996 evdev->handle.handler = handler;
997 evdev->handle.private = evdev;
999 evdev->dev.devt = MKDEV(INPUT_MAJOR, minor);
1000 evdev->dev.class = &input_class;
1001 evdev->dev.parent = &dev->dev;
1002 evdev->dev.release = evdev_free;
1003 device_initialize(&evdev->dev);
1005 error = input_register_handle(&evdev->handle);
1007 goto err_free_evdev;
1009 cdev_init(&evdev->cdev, &evdev_fops);
1010 evdev->cdev.kobj.parent = &evdev->dev.kobj;
1011 error = cdev_add(&evdev->cdev, evdev->dev.devt, 1);
1013 goto err_unregister_handle;
1015 error = device_add(&evdev->dev);
1017 goto err_cleanup_evdev;
1022 evdev_cleanup(evdev);
1023 err_unregister_handle:
1024 input_unregister_handle(&evdev->handle);
1026 put_device(&evdev->dev);
1028 input_free_minor(minor);
1032 static void evdev_disconnect(struct input_handle *handle)
1034 struct evdev *evdev = handle->private;
1036 device_del(&evdev->dev);
1037 evdev_cleanup(evdev);
1038 input_free_minor(MINOR(evdev->dev.devt));
1039 input_unregister_handle(handle);
1040 put_device(&evdev->dev);
1043 static const struct input_device_id evdev_ids[] = {
1044 { .driver_info = 1 }, /* Matches all devices */
1045 { }, /* Terminating zero entry */
1048 MODULE_DEVICE_TABLE(input, evdev_ids);
1050 static struct input_handler evdev_handler = {
1051 .event = evdev_event,
1052 .events = evdev_events,
1053 .connect = evdev_connect,
1054 .disconnect = evdev_disconnect,
1055 .legacy_minors = true,
1056 .minor = EVDEV_MINOR_BASE,
1058 .id_table = evdev_ids,
1061 static int __init evdev_init(void)
1063 return input_register_handler(&evdev_handler);
1066 static void __exit evdev_exit(void)
1068 input_unregister_handler(&evdev_handler);
1071 module_init(evdev_init);
1072 module_exit(evdev_exit);
1074 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
1075 MODULE_DESCRIPTION("Input driver event char devices");
1076 MODULE_LICENSE("GPL");