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/module.h>
22 #include <linux/init.h>
23 #include <linux/input/mt.h>
24 #include <linux/major.h>
25 #include <linux/device.h>
26 #include "input-compat.h"
31 struct input_handle handle;
32 wait_queue_head_t wait;
33 struct evdev_client __rcu *grab;
34 struct list_head client_list;
35 spinlock_t client_lock; /* protects client_list */
44 unsigned int packet_head; /* [future] position of the first element of next packet */
45 spinlock_t buffer_lock; /* protects access to buffer, head and tail */
46 struct fasync_struct *fasync;
48 struct list_head node;
51 struct input_event buffer[];
54 static struct evdev *evdev_table[EVDEV_MINORS];
55 static DEFINE_MUTEX(evdev_table_mutex);
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);
296 evdev_close_device(evdev);
297 put_device(&evdev->dev);
302 static unsigned int evdev_compute_buffer_size(struct input_dev *dev)
304 unsigned int n_events =
305 max(dev->hint_events_per_packet * EVDEV_BUF_PACKETS,
306 EVDEV_MIN_BUFFER_SIZE);
308 return roundup_pow_of_two(n_events);
311 static int evdev_open(struct inode *inode, struct file *file)
314 struct evdev_client *client;
315 int i = iminor(inode) - EVDEV_MINOR_BASE;
316 unsigned int bufsize;
319 if (i >= EVDEV_MINORS)
322 error = mutex_lock_interruptible(&evdev_table_mutex);
325 evdev = evdev_table[i];
327 get_device(&evdev->dev);
328 mutex_unlock(&evdev_table_mutex);
333 bufsize = evdev_compute_buffer_size(evdev->handle.dev);
335 client = kzalloc(sizeof(struct evdev_client) +
336 bufsize * sizeof(struct input_event),
343 client->bufsize = bufsize;
344 spin_lock_init(&client->buffer_lock);
345 client->evdev = evdev;
346 evdev_attach_client(evdev, client);
348 error = evdev_open_device(evdev);
350 goto err_free_client;
352 file->private_data = client;
353 nonseekable_open(inode, file);
358 evdev_detach_client(evdev, client);
361 put_device(&evdev->dev);
365 static ssize_t evdev_write(struct file *file, const char __user *buffer,
366 size_t count, loff_t *ppos)
368 struct evdev_client *client = file->private_data;
369 struct evdev *evdev = client->evdev;
370 struct input_event event;
373 if (count != 0 && count < input_event_size())
376 retval = mutex_lock_interruptible(&evdev->mutex);
385 while (retval + input_event_size() <= count) {
387 if (input_event_from_user(buffer + retval, &event)) {
391 retval += input_event_size();
393 input_inject_event(&evdev->handle,
394 event.type, event.code, event.value);
398 mutex_unlock(&evdev->mutex);
402 static int evdev_fetch_next_event(struct evdev_client *client,
403 struct input_event *event)
407 spin_lock_irq(&client->buffer_lock);
409 have_event = client->packet_head != client->tail;
411 *event = client->buffer[client->tail++];
412 client->tail &= client->bufsize - 1;
415 spin_unlock_irq(&client->buffer_lock);
420 static ssize_t evdev_read(struct file *file, char __user *buffer,
421 size_t count, loff_t *ppos)
423 struct evdev_client *client = file->private_data;
424 struct evdev *evdev = client->evdev;
425 struct input_event event;
429 if (count != 0 && count < input_event_size())
436 if (client->packet_head == client->tail &&
437 (file->f_flags & O_NONBLOCK))
441 * count == 0 is special - no IO is done but we check
442 * for error conditions (see above).
447 while (read + input_event_size() <= count &&
448 evdev_fetch_next_event(client, &event)) {
450 if (input_event_to_user(buffer + read, &event))
453 read += input_event_size();
459 if (!(file->f_flags & O_NONBLOCK)) {
460 error = wait_event_interruptible(evdev->wait,
461 client->packet_head != client->tail ||
471 /* No kernel lock - fine */
472 static unsigned int evdev_poll(struct file *file, poll_table *wait)
474 struct evdev_client *client = file->private_data;
475 struct evdev *evdev = client->evdev;
478 poll_wait(file, &evdev->wait, wait);
480 mask = evdev->exist ? POLLOUT | POLLWRNORM : POLLHUP | POLLERR;
481 if (client->packet_head != client->tail)
482 mask |= POLLIN | POLLRDNORM;
489 #define BITS_PER_LONG_COMPAT (sizeof(compat_long_t) * 8)
490 #define BITS_TO_LONGS_COMPAT(x) ((((x) - 1) / BITS_PER_LONG_COMPAT) + 1)
493 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
494 unsigned int maxlen, void __user *p, int compat)
499 len = BITS_TO_LONGS_COMPAT(maxbit) * sizeof(compat_long_t);
503 for (i = 0; i < len / sizeof(compat_long_t); i++)
504 if (copy_to_user((compat_long_t __user *) p + i,
505 (compat_long_t *) bits +
506 i + 1 - ((i % 2) << 1),
507 sizeof(compat_long_t)))
510 len = BITS_TO_LONGS(maxbit) * sizeof(long);
514 if (copy_to_user(p, bits, len))
521 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
522 unsigned int maxlen, void __user *p, int compat)
525 BITS_TO_LONGS_COMPAT(maxbit) * sizeof(compat_long_t) :
526 BITS_TO_LONGS(maxbit) * sizeof(long);
531 return copy_to_user(p, bits, len) ? -EFAULT : len;
533 #endif /* __BIG_ENDIAN */
537 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
538 unsigned int maxlen, void __user *p, int compat)
540 int len = BITS_TO_LONGS(maxbit) * sizeof(long);
545 return copy_to_user(p, bits, len) ? -EFAULT : len;
548 #endif /* CONFIG_COMPAT */
550 static int str_to_user(const char *str, unsigned int maxlen, void __user *p)
557 len = strlen(str) + 1;
561 return copy_to_user(p, str, len) ? -EFAULT : len;
564 #define OLD_KEY_MAX 0x1ff
565 static int handle_eviocgbit(struct input_dev *dev,
566 unsigned int type, unsigned int size,
567 void __user *p, int compat_mode)
569 static unsigned long keymax_warn_time;
575 case 0: bits = dev->evbit; len = EV_MAX; break;
576 case EV_KEY: bits = dev->keybit; len = KEY_MAX; break;
577 case EV_REL: bits = dev->relbit; len = REL_MAX; break;
578 case EV_ABS: bits = dev->absbit; len = ABS_MAX; break;
579 case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break;
580 case EV_LED: bits = dev->ledbit; len = LED_MAX; break;
581 case EV_SND: bits = dev->sndbit; len = SND_MAX; break;
582 case EV_FF: bits = dev->ffbit; len = FF_MAX; break;
583 case EV_SW: bits = dev->swbit; len = SW_MAX; break;
584 default: return -EINVAL;
588 * Work around bugs in userspace programs that like to do
589 * EVIOCGBIT(EV_KEY, KEY_MAX) and not realize that 'len'
590 * should be in bytes, not in bits.
592 if (type == EV_KEY && size == OLD_KEY_MAX) {
594 if (printk_timed_ratelimit(&keymax_warn_time, 10 * 1000))
595 pr_warning("(EVIOCGBIT): Suspicious buffer size %u, "
596 "limiting output to %zu bytes. See "
597 "http://userweb.kernel.org/~dtor/eviocgbit-bug.html\n",
599 BITS_TO_LONGS(OLD_KEY_MAX) * sizeof(long));
602 return bits_to_user(bits, len, size, p, compat_mode);
606 static int evdev_handle_get_keycode(struct input_dev *dev, void __user *p)
608 struct input_keymap_entry ke = {
609 .len = sizeof(unsigned int),
612 int __user *ip = (int __user *)p;
616 if (copy_from_user(ke.scancode, p, sizeof(unsigned int)))
619 error = input_get_keycode(dev, &ke);
623 if (put_user(ke.keycode, ip + 1))
629 static int evdev_handle_get_keycode_v2(struct input_dev *dev, void __user *p)
631 struct input_keymap_entry ke;
634 if (copy_from_user(&ke, p, sizeof(ke)))
637 error = input_get_keycode(dev, &ke);
641 if (copy_to_user(p, &ke, sizeof(ke)))
647 static int evdev_handle_set_keycode(struct input_dev *dev, void __user *p)
649 struct input_keymap_entry ke = {
650 .len = sizeof(unsigned int),
653 int __user *ip = (int __user *)p;
655 if (copy_from_user(ke.scancode, p, sizeof(unsigned int)))
658 if (get_user(ke.keycode, ip + 1))
661 return input_set_keycode(dev, &ke);
664 static int evdev_handle_set_keycode_v2(struct input_dev *dev, void __user *p)
666 struct input_keymap_entry ke;
668 if (copy_from_user(&ke, p, sizeof(ke)))
671 if (ke.len > sizeof(ke.scancode))
674 return input_set_keycode(dev, &ke);
677 static int evdev_handle_mt_request(struct input_dev *dev,
681 const struct input_mt *mt = dev->mt;
686 if (get_user(code, &ip[0]))
688 if (!mt || !input_is_mt_value(code))
691 max_slots = (size - sizeof(__u32)) / sizeof(__s32);
692 for (i = 0; i < mt->num_slots && i < max_slots; i++) {
693 int value = input_mt_get_value(&mt->slots[i], code);
694 if (put_user(value, &ip[1 + i]))
701 static long evdev_do_ioctl(struct file *file, unsigned int cmd,
702 void __user *p, int compat_mode)
704 struct evdev_client *client = file->private_data;
705 struct evdev *evdev = client->evdev;
706 struct input_dev *dev = evdev->handle.dev;
707 struct input_absinfo abs;
708 struct ff_effect effect;
709 int __user *ip = (int __user *)p;
710 unsigned int i, t, u, v;
714 /* First we check for fixed-length commands */
718 return put_user(EV_VERSION, ip);
721 if (copy_to_user(p, &dev->id, sizeof(struct input_id)))
726 if (!test_bit(EV_REP, dev->evbit))
728 if (put_user(dev->rep[REP_DELAY], ip))
730 if (put_user(dev->rep[REP_PERIOD], ip + 1))
735 if (!test_bit(EV_REP, dev->evbit))
739 if (get_user(v, ip + 1))
742 input_inject_event(&evdev->handle, EV_REP, REP_DELAY, u);
743 input_inject_event(&evdev->handle, EV_REP, REP_PERIOD, v);
748 return input_ff_erase(dev, (int)(unsigned long) p, file);
751 i = test_bit(EV_FF, dev->evbit) ?
752 dev->ff->max_effects : 0;
759 return evdev_grab(evdev, client);
761 return evdev_ungrab(evdev, client);
764 if (copy_from_user(&i, p, sizeof(unsigned int)))
766 if (i != CLOCK_MONOTONIC && i != CLOCK_REALTIME)
772 return evdev_handle_get_keycode(dev, p);
775 return evdev_handle_set_keycode(dev, p);
777 case EVIOCGKEYCODE_V2:
778 return evdev_handle_get_keycode_v2(dev, p);
780 case EVIOCSKEYCODE_V2:
781 return evdev_handle_set_keycode_v2(dev, p);
784 size = _IOC_SIZE(cmd);
786 /* Now check variable-length commands */
787 #define EVIOC_MASK_SIZE(nr) ((nr) & ~(_IOC_SIZEMASK << _IOC_SIZESHIFT))
788 switch (EVIOC_MASK_SIZE(cmd)) {
791 return bits_to_user(dev->propbit, INPUT_PROP_MAX,
792 size, p, compat_mode);
794 case EVIOCGMTSLOTS(0):
795 return evdev_handle_mt_request(dev, size, ip);
798 return bits_to_user(dev->key, KEY_MAX, size, p, compat_mode);
801 return bits_to_user(dev->led, LED_MAX, size, p, compat_mode);
804 return bits_to_user(dev->snd, SND_MAX, size, p, compat_mode);
807 return bits_to_user(dev->sw, SW_MAX, size, p, compat_mode);
810 return str_to_user(dev->name, size, p);
813 return str_to_user(dev->phys, size, p);
816 return str_to_user(dev->uniq, size, p);
818 case EVIOC_MASK_SIZE(EVIOCSFF):
819 if (input_ff_effect_from_user(p, size, &effect))
822 error = input_ff_upload(dev, &effect, file);
824 if (put_user(effect.id, &(((struct ff_effect __user *)p)->id)))
830 /* Multi-number variable-length handlers */
831 if (_IOC_TYPE(cmd) != 'E')
834 if (_IOC_DIR(cmd) == _IOC_READ) {
836 if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0, 0)))
837 return handle_eviocgbit(dev,
838 _IOC_NR(cmd) & EV_MAX, size,
841 if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) {
846 t = _IOC_NR(cmd) & ABS_MAX;
847 abs = dev->absinfo[t];
849 if (copy_to_user(p, &abs, min_t(size_t,
850 size, sizeof(struct input_absinfo))))
857 if (_IOC_DIR(cmd) == _IOC_WRITE) {
859 if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) {
864 t = _IOC_NR(cmd) & ABS_MAX;
866 if (copy_from_user(&abs, p, min_t(size_t,
867 size, sizeof(struct input_absinfo))))
870 if (size < sizeof(struct input_absinfo))
873 /* We can't change number of reserved MT slots */
874 if (t == ABS_MT_SLOT)
878 * Take event lock to ensure that we are not
879 * changing device parameters in the middle
882 spin_lock_irq(&dev->event_lock);
883 dev->absinfo[t] = abs;
884 spin_unlock_irq(&dev->event_lock);
893 static long evdev_ioctl_handler(struct file *file, unsigned int cmd,
894 void __user *p, int compat_mode)
896 struct evdev_client *client = file->private_data;
897 struct evdev *evdev = client->evdev;
900 retval = mutex_lock_interruptible(&evdev->mutex);
909 retval = evdev_do_ioctl(file, cmd, p, compat_mode);
912 mutex_unlock(&evdev->mutex);
916 static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
918 return evdev_ioctl_handler(file, cmd, (void __user *)arg, 0);
922 static long evdev_ioctl_compat(struct file *file,
923 unsigned int cmd, unsigned long arg)
925 return evdev_ioctl_handler(file, cmd, compat_ptr(arg), 1);
929 static const struct file_operations evdev_fops = {
930 .owner = THIS_MODULE,
932 .write = evdev_write,
935 .release = evdev_release,
936 .unlocked_ioctl = evdev_ioctl,
938 .compat_ioctl = evdev_ioctl_compat,
940 .fasync = evdev_fasync,
941 .flush = evdev_flush,
945 static int evdev_install_chrdev(struct evdev *evdev)
948 * No need to do any locking here as calls to connect and
949 * disconnect are serialized by the input core
951 evdev_table[evdev->minor] = evdev;
955 static void evdev_remove_chrdev(struct evdev *evdev)
958 * Lock evdev table to prevent race with evdev_open()
960 mutex_lock(&evdev_table_mutex);
961 evdev_table[evdev->minor] = NULL;
962 mutex_unlock(&evdev_table_mutex);
966 * Mark device non-existent. This disables writes, ioctls and
967 * prevents new users from opening the device. Already posted
968 * blocking reads will stay, however new ones will fail.
970 static void evdev_mark_dead(struct evdev *evdev)
972 mutex_lock(&evdev->mutex);
973 evdev->exist = false;
974 mutex_unlock(&evdev->mutex);
977 static void evdev_cleanup(struct evdev *evdev)
979 struct input_handle *handle = &evdev->handle;
981 evdev_mark_dead(evdev);
983 evdev_remove_chrdev(evdev);
985 /* evdev is marked dead so no one else accesses evdev->open */
987 input_flush_device(handle, NULL);
988 input_close_device(handle);
993 * Create new evdev device. Note that input core serializes calls
994 * to connect and disconnect so we don't need to lock evdev_table here.
996 static int evdev_connect(struct input_handler *handler, struct input_dev *dev,
997 const struct input_device_id *id)
1003 for (minor = 0; minor < EVDEV_MINORS; minor++)
1004 if (!evdev_table[minor])
1007 if (minor == EVDEV_MINORS) {
1008 pr_err("no more free evdev devices\n");
1012 evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL);
1016 INIT_LIST_HEAD(&evdev->client_list);
1017 spin_lock_init(&evdev->client_lock);
1018 mutex_init(&evdev->mutex);
1019 init_waitqueue_head(&evdev->wait);
1021 dev_set_name(&evdev->dev, "event%d", minor);
1022 evdev->exist = true;
1023 evdev->minor = minor;
1025 evdev->handle.dev = input_get_device(dev);
1026 evdev->handle.name = dev_name(&evdev->dev);
1027 evdev->handle.handler = handler;
1028 evdev->handle.private = evdev;
1030 evdev->dev.devt = MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor);
1031 evdev->dev.class = &input_class;
1032 evdev->dev.parent = &dev->dev;
1033 evdev->dev.release = evdev_free;
1034 device_initialize(&evdev->dev);
1036 error = input_register_handle(&evdev->handle);
1038 goto err_free_evdev;
1040 error = evdev_install_chrdev(evdev);
1042 goto err_unregister_handle;
1044 error = device_add(&evdev->dev);
1046 goto err_cleanup_evdev;
1051 evdev_cleanup(evdev);
1052 err_unregister_handle:
1053 input_unregister_handle(&evdev->handle);
1055 put_device(&evdev->dev);
1059 static void evdev_disconnect(struct input_handle *handle)
1061 struct evdev *evdev = handle->private;
1063 device_del(&evdev->dev);
1064 evdev_cleanup(evdev);
1065 input_unregister_handle(handle);
1066 put_device(&evdev->dev);
1069 static const struct input_device_id evdev_ids[] = {
1070 { .driver_info = 1 }, /* Matches all devices */
1071 { }, /* Terminating zero entry */
1074 MODULE_DEVICE_TABLE(input, evdev_ids);
1076 static struct input_handler evdev_handler = {
1077 .event = evdev_event,
1078 .events = evdev_events,
1079 .connect = evdev_connect,
1080 .disconnect = evdev_disconnect,
1081 .fops = &evdev_fops,
1082 .minor = EVDEV_MINOR_BASE,
1084 .id_table = evdev_ids,
1087 static int __init evdev_init(void)
1089 return input_register_handler(&evdev_handler);
1092 static void __exit evdev_exit(void)
1094 input_unregister_handler(&evdev_handler);
1097 module_init(evdev_init);
1098 module_exit(evdev_exit);
1100 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
1101 MODULE_DESCRIPTION("Input driver event char devices");
1102 MODULE_LICENSE("GPL");