[deliverable/linux.git] / drivers / input / evdev.c

/*
 * Event char devices, giving access to raw input device events.
 *
 * Copyright (c) 1999-2002 Vojtech Pavlik
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

#define EVDEV_MINOR_BASE	64
#define EVDEV_MINORS		32
#define EVDEV_BUFFER_SIZE	64

#include <linux/poll.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/major.h>
#include <linux/smp_lock.h>
#include <linux/device.h>
#include <linux/compat.h>

struct evdev {
	int exist;
	int open;
	int minor;
	char name[16];
	struct input_handle handle;
	wait_queue_head_t wait;
	struct evdev_list *grab;
	struct list_head list;
};

struct evdev_list {
	struct input_event buffer[EVDEV_BUFFER_SIZE];
	int head;
	int tail;
	struct fasync_struct *fasync;
	struct evdev *evdev;
	struct list_head node;
};

static struct evdev *evdev_table[EVDEV_MINORS];

static void evdev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
{
	struct evdev *evdev = handle->private;
	struct evdev_list *list;

	if (evdev->grab) {
		list = evdev->grab;

		do_gettimeofday(&list->buffer[list->head].time);
		list->buffer[list->head].type = type;
		list->buffer[list->head].code = code;
		list->buffer[list->head].value = value;
		list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1);

		kill_fasync(&list->fasync, SIGIO, POLL_IN);
	} else
		list_for_each_entry(list, &evdev->list, node) {

			do_gettimeofday(&list->buffer[list->head].time);
			list->buffer[list->head].type = type;
			list->buffer[list->head].code = code;
			list->buffer[list->head].value = value;
			list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1);

			kill_fasync(&list->fasync, SIGIO, POLL_IN);
		}

	wake_up_interruptible(&evdev->wait);
}

static int evdev_fasync(int fd, struct file *file, int on)
{
	int retval;
	struct evdev_list *list = file->private_data;

	retval = fasync_helper(fd, file, on, &list->fasync);

	return retval < 0 ? retval : 0;
}

static int evdev_flush(struct file *file, fl_owner_t id)
{
	struct evdev_list *list = file->private_data;

	if (!list->evdev->exist)
		return -ENODEV;

	return input_flush_device(&list->evdev->handle, file);
}

static void evdev_free(struct evdev *evdev)
{
	evdev_table[evdev->minor] = NULL;
	kfree(evdev);
}

static int evdev_release(struct inode * inode, struct file * file)
{
	struct evdev_list *list = file->private_data;

	if (list->evdev->grab == list) {
		input_release_device(&list->evdev->handle);
		list->evdev->grab = NULL;
	}

	evdev_fasync(-1, file, 0);
	list_del(&list->node);

	if (!--list->evdev->open) {
		if (list->evdev->exist)
			input_close_device(&list->evdev->handle);
		else
			evdev_free(list->evdev);
	}

	kfree(list);
	return 0;
}

static int evdev_open(struct inode * inode, struct file * file)
{
	struct evdev_list *list;
	int i = iminor(inode) - EVDEV_MINOR_BASE;

	if (i >= EVDEV_MINORS || !evdev_table[i] || !evdev_table[i]->exist)
		return -ENODEV;

	if (!(list = kzalloc(sizeof(struct evdev_list), GFP_KERNEL)))
		return -ENOMEM;

	list->evdev = evdev_table[i];
	list_add_tail(&list->node, &evdev_table[i]->list);
	file->private_data = list;

	if (!list->evdev->open++)
		if (list->evdev->exist)
			input_open_device(&list->evdev->handle);

	return 0;
}

#ifdef CONFIG_COMPAT

struct input_event_compat {
	struct compat_timeval time;
	__u16 type;
	__u16 code;
	__s32 value;
};

/* Note to the author of this code: did it ever occur to
   you why the ifdefs are needed? Think about it again. -AK */
#ifdef CONFIG_X86_64
#  define COMPAT_TEST is_compat_task()
#elif defined(CONFIG_IA64)
#  define COMPAT_TEST IS_IA32_PROCESS(task_pt_regs(current))
#elif defined(CONFIG_S390)
#  define COMPAT_TEST test_thread_flag(TIF_31BIT)
#elif defined(CONFIG_MIPS)
#  define COMPAT_TEST (current->thread.mflags & MF_32BIT_ADDR)
#else
#  define COMPAT_TEST test_thread_flag(TIF_32BIT)
#endif

static inline size_t evdev_event_size(void)
{
	return COMPAT_TEST ?
		sizeof(struct input_event_compat) : sizeof(struct input_event);
}

static int evdev_event_from_user(const char __user *buffer, struct input_event *event)
{
	if (COMPAT_TEST) {
		struct input_event_compat compat_event;

		if (copy_from_user(&compat_event, buffer, sizeof(struct input_event_compat)))
			return -EFAULT;

		event->time.tv_sec = compat_event.time.tv_sec;
		event->time.tv_usec = compat_event.time.tv_usec;
		event->type = compat_event.type;
		event->code = compat_event.code;
		event->value = compat_event.value;

	} else {
		if (copy_from_user(event, buffer, sizeof(struct input_event)))
			return -EFAULT;
	}

	return 0;
}

static int evdev_event_to_user(char __user *buffer, const struct input_event *event)
{
	if (COMPAT_TEST) {
		struct input_event_compat compat_event;

		compat_event.time.tv_sec = event->time.tv_sec;
		compat_event.time.tv_usec = event->time.tv_usec;
		compat_event.type = event->type;
		compat_event.code = event->code;
		compat_event.value = event->value;

		if (copy_to_user(buffer, &compat_event, sizeof(struct input_event_compat)))
			return -EFAULT;

	} else {
		if (copy_to_user(buffer, event, sizeof(struct input_event)))
			return -EFAULT;
	}

	return 0;
}

#else

static inline size_t evdev_event_size(void)
{
	return sizeof(struct input_event);
}

static int evdev_event_from_user(const char __user *buffer, struct input_event *event)
{
	if (copy_from_user(event, buffer, sizeof(struct input_event)))
		return -EFAULT;

	return 0;
}

static int evdev_event_to_user(char __user *buffer, const struct input_event *event)
{
	if (copy_to_user(buffer, event, sizeof(struct input_event)))
		return -EFAULT;

	return 0;
}

#endif /* CONFIG_COMPAT */

static ssize_t evdev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
{
	struct evdev_list *list = file->private_data;
	struct input_event event;
	int retval = 0;

	if (!list->evdev->exist)
		return -ENODEV;

	while (retval < count) {

		if (evdev_event_from_user(buffer + retval, &event))
			return -EFAULT;
		input_inject_event(&list->evdev->handle, event.type, event.code, event.value);
		retval += evdev_event_size();
	}

	return retval;
}

static ssize_t evdev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
{
	struct evdev_list *list = file->private_data;
	int retval;

	if (count < evdev_event_size())
		return -EINVAL;

	if (list->head == list->tail && list->evdev->exist && (file->f_flags & O_NONBLOCK))
		return -EAGAIN;

	retval = wait_event_interruptible(list->evdev->wait,
		list->head != list->tail || (!list->evdev->exist));

	if (retval)
		return retval;

	if (!list->evdev->exist)
		return -ENODEV;

	while (list->head != list->tail && retval + evdev_event_size() <= count) {

		struct input_event *event = (struct input_event *) list->buffer + list->tail;

		if (evdev_event_to_user(buffer + retval, event))
			return -EFAULT;

		list->tail = (list->tail + 1) & (EVDEV_BUFFER_SIZE - 1);
		retval += evdev_event_size();
	}

	return retval;
}

/* No kernel lock - fine */
static unsigned int evdev_poll(struct file *file, poll_table *wait)
{
	struct evdev_list *list = file->private_data;

	poll_wait(file, &list->evdev->wait, wait);
	return ((list->head == list->tail) ? 0 : (POLLIN | POLLRDNORM)) |
		(list->evdev->exist ? 0 : (POLLHUP | POLLERR));
}

#ifdef CONFIG_COMPAT

#define BITS_PER_LONG_COMPAT (sizeof(compat_long_t) * 8)
#define NBITS_COMPAT(x) ((((x) - 1) / BITS_PER_LONG_COMPAT) + 1)

#ifdef __BIG_ENDIAN
static int bits_to_user(unsigned long *bits, unsigned int maxbit,
			unsigned int maxlen, void __user *p, int compat)
{
	int len, i;

	if (compat) {
		len = NBITS_COMPAT(maxbit) * sizeof(compat_long_t);
		if (len < maxlen)
			len = maxlen;

		for (i = 0; i < len / sizeof(compat_long_t); i++)
			if (copy_to_user((compat_long_t __user *) p + i,
					 (compat_long_t *) bits +
						i + 1 - ((i % 2) << 1),
					 sizeof(compat_long_t)))
				return -EFAULT;
	} else {
		len = NBITS(maxbit) * sizeof(long);
		if (len > maxlen)
			len = maxlen;

		if (copy_to_user(p, bits, len))
			return -EFAULT;
	}

	return len;
}
#else
static int bits_to_user(unsigned long *bits, unsigned int maxbit,
			unsigned int maxlen, void __user *p, int compat)
{
	int len = compat ?
			NBITS_COMPAT(maxbit) * sizeof(compat_long_t) :
			NBITS(maxbit) * sizeof(long);

	if (len > maxlen)
		len = maxlen;

	return copy_to_user(p, bits, len) ? -EFAULT : len;
}
#endif /* __BIG_ENDIAN */

#else

static int bits_to_user(unsigned long *bits, unsigned int maxbit,
			unsigned int maxlen, void __user *p, int compat)
{
	int len = NBITS(maxbit) * sizeof(long);

	if (len > maxlen)
		len = maxlen;

	return copy_to_user(p, bits, len) ? -EFAULT : len;
}

#endif /* CONFIG_COMPAT */

static int str_to_user(const char *str, unsigned int maxlen, void __user *p)
{
	int len;

	if (!str)
		return -ENOENT;

	len = strlen(str) + 1;
	if (len > maxlen)
		len = maxlen;

	return copy_to_user(p, str, len) ? -EFAULT : len;
}

static long evdev_ioctl_handler(struct file *file, unsigned int cmd,
				void __user *p, int compat_mode)
{
	struct evdev_list *list = file->private_data;
	struct evdev *evdev = list->evdev;
	struct input_dev *dev = evdev->handle.dev;
	struct input_absinfo abs;
	int __user *ip = (int __user *)p;
	int i, t, u, v;

	if (!evdev->exist)
		return -ENODEV;

	switch (cmd) {

		case EVIOCGVERSION:
			return put_user(EV_VERSION, ip);

		case EVIOCGID:
			if (copy_to_user(p, &dev->id, sizeof(struct input_id)))
				return -EFAULT;
			return 0;

		case EVIOCGREP:
			if (!test_bit(EV_REP, dev->evbit))
				return -ENOSYS;
			if (put_user(dev->rep[REP_DELAY], ip))
				return -EFAULT;
			if (put_user(dev->rep[REP_PERIOD], ip + 1))
				return -EFAULT;
			return 0;

		case EVIOCSREP:
			if (!test_bit(EV_REP, dev->evbit))
				return -ENOSYS;
			if (get_user(u, ip))
				return -EFAULT;
			if (get_user(v, ip + 1))
				return -EFAULT;

			input_inject_event(&evdev->handle, EV_REP, REP_DELAY, u);
			input_inject_event(&evdev->handle, EV_REP, REP_PERIOD, v);

			return 0;

		case EVIOCGKEYCODE:
			if (get_user(t, ip))
				return -EFAULT;
			if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
				return -EINVAL;
			if (put_user(INPUT_KEYCODE(dev, t), ip + 1))
				return -EFAULT;
			return 0;

		case EVIOCSKEYCODE:
			if (get_user(t, ip))
				return -EFAULT;
			if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
				return -EINVAL;
			if (get_user(v, ip + 1))
				return -EFAULT;
			if (v < 0 || v > KEY_MAX)
				return -EINVAL;
			if (dev->keycodesize < sizeof(v) && (v >> (dev->keycodesize * 8)))
				return -EINVAL;

			u = SET_INPUT_KEYCODE(dev, t, v);
			clear_bit(u, dev->keybit);
			set_bit(v, dev->keybit);
			for (i = 0; i < dev->keycodemax; i++)
				if (INPUT_KEYCODE(dev, i) == u)
					set_bit(u, dev->keybit);

			return 0;

		case EVIOCSFF:
			if (dev->upload_effect) {
				struct ff_effect effect;
				int err;

				if (copy_from_user(&effect, p, sizeof(effect)))
					return -EFAULT;
				err = dev->upload_effect(dev, &effect);
				if (put_user(effect.id, &(((struct ff_effect __user *)p)->id)))
					return -EFAULT;
				return err;
			} else
				return -ENOSYS;

		case EVIOCRMFF:
			if (!dev->erase_effect)
				return -ENOSYS;

			return dev->erase_effect(dev, (int)(unsigned long) p);

		case EVIOCGEFFECTS:
			if (put_user(dev->ff_effects_max, ip))
				return -EFAULT;
			return 0;

		case EVIOCGRAB:
			if (p) {
				if (evdev->grab)
					return -EBUSY;
				if (input_grab_device(&evdev->handle))
					return -EBUSY;
				evdev->grab = list;
				return 0;
			} else {
				if (evdev->grab != list)
					return -EINVAL;
				input_release_device(&evdev->handle);
				evdev->grab = NULL;
				return 0;
			}

		default:

			if (_IOC_TYPE(cmd) != 'E')
				return -EINVAL;

			if (_IOC_DIR(cmd) == _IOC_READ) {

				if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) {

					long *bits;
					int len;

					switch (_IOC_NR(cmd) & EV_MAX) {
						case      0: bits = dev->evbit;  len = EV_MAX;  break;
						case EV_KEY: bits = dev->keybit; len = KEY_MAX; break;
						case EV_REL: bits = dev->relbit; len = REL_MAX; break;
						case EV_ABS: bits = dev->absbit; len = ABS_MAX; break;
						case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break;
						case EV_LED: bits = dev->ledbit; len = LED_MAX; break;
						case EV_SND: bits = dev->sndbit; len = SND_MAX; break;
						case EV_FF:  bits = dev->ffbit;  len = FF_MAX;  break;
						case EV_SW:  bits = dev->swbit;  len = SW_MAX;  break;
						default: return -EINVAL;
					}
					return bits_to_user(bits, len, _IOC_SIZE(cmd), p, compat_mode);
				}

				if (_IOC_NR(cmd) == _IOC_NR(EVIOCGKEY(0)))
					return bits_to_user(dev->key, KEY_MAX, _IOC_SIZE(cmd),
							    p, compat_mode);

				if (_IOC_NR(cmd) == _IOC_NR(EVIOCGLED(0)))
					return bits_to_user(dev->led, LED_MAX, _IOC_SIZE(cmd),
							    p, compat_mode);

				if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0)))
					return bits_to_user(dev->snd, SND_MAX, _IOC_SIZE(cmd),
							    p, compat_mode);

				if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSW(0)))
					return bits_to_user(dev->sw, SW_MAX, _IOC_SIZE(cmd),
							    p, compat_mode);

				if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0)))
					return str_to_user(dev->name, _IOC_SIZE(cmd), p);

				if (_IOC_NR(cmd) == _IOC_NR(EVIOCGPHYS(0)))
					return str_to_user(dev->phys, _IOC_SIZE(cmd), p);

				if (_IOC_NR(cmd) == _IOC_NR(EVIOCGUNIQ(0)))
					return str_to_user(dev->uniq, _IOC_SIZE(cmd), p);

				if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) {

					int t = _IOC_NR(cmd) & ABS_MAX;

					abs.value = dev->abs[t];
					abs.minimum = dev->absmin[t];
					abs.maximum = dev->absmax[t];
					abs.fuzz = dev->absfuzz[t];
					abs.flat = dev->absflat[t];

					if (copy_to_user(p, &abs, sizeof(struct input_absinfo)))
						return -EFAULT;

					return 0;
				}

			}

			if (_IOC_DIR(cmd) == _IOC_WRITE) {

				if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) {

					int t = _IOC_NR(cmd) & ABS_MAX;

					if (copy_from_user(&abs, p, sizeof(struct input_absinfo)))
						return -EFAULT;

					dev->abs[t] = abs.value;
					dev->absmin[t] = abs.minimum;
					dev->absmax[t] = abs.maximum;
					dev->absfuzz[t] = abs.fuzz;
					dev->absflat[t] = abs.flat;

					return 0;
				}
			}
	}
	return -EINVAL;
}

static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	return evdev_ioctl_handler(file, cmd, (void __user *)arg, 0);
}

#ifdef CONFIG_COMPAT
static long evdev_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
{
	return evdev_ioctl_handler(file, cmd, compat_ptr(arg), 1);
}
#endif

static struct file_operations evdev_fops = {
	.owner =	THIS_MODULE,
	.read =		evdev_read,
	.write =	evdev_write,
	.poll =		evdev_poll,
	.open =		evdev_open,
	.release =	evdev_release,
	.unlocked_ioctl = evdev_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl =	evdev_ioctl_compat,
#endif
	.fasync =	evdev_fasync,
	.flush =	evdev_flush
};

static struct input_handle *evdev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
{
	struct evdev *evdev;
	struct class_device *cdev;
	int minor;

	for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++);
	if (minor == EVDEV_MINORS) {
		printk(KERN_ERR "evdev: no more free evdev devices\n");
		return NULL;
	}

	if (!(evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL)))
		return NULL;

	INIT_LIST_HEAD(&evdev->list);
	init_waitqueue_head(&evdev->wait);

	evdev->exist = 1;
	evdev->minor = minor;
	evdev->handle.dev = dev;
	evdev->handle.name = evdev->name;
	evdev->handle.handler = handler;
	evdev->handle.private = evdev;
	sprintf(evdev->name, "event%d", minor);

	evdev_table[minor] = evdev;

	cdev = class_device_create(&input_class, &dev->cdev,
			MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor),
			dev->cdev.dev, evdev->name);

	/* temporary symlink to keep userspace happy */
	sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
			  evdev->name);

	return &evdev->handle;
}

static void evdev_disconnect(struct input_handle *handle)
{
	struct evdev *evdev = handle->private;
	struct evdev_list *list;

	sysfs_remove_link(&input_class.subsys.kset.kobj, evdev->name);
	class_device_destroy(&input_class,
			MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + evdev->minor));
	evdev->exist = 0;

	if (evdev->open) {
		input_close_device(handle);
		wake_up_interruptible(&evdev->wait);
		list_for_each_entry(list, &evdev->list, node)
			kill_fasync(&list->fasync, SIGIO, POLL_HUP);
	} else
		evdev_free(evdev);
}

static struct input_device_id evdev_ids[] = {
	{ .driver_info = 1 },	/* Matches all devices */
	{ },			/* Terminating zero entry */
};

MODULE_DEVICE_TABLE(input, evdev_ids);

static struct input_handler evdev_handler = {
	.event =	evdev_event,
	.connect =	evdev_connect,
	.disconnect =	evdev_disconnect,
	.fops =		&evdev_fops,
	.minor =	EVDEV_MINOR_BASE,
	.name =		"evdev",
	.id_table =	evdev_ids,
};

static int __init evdev_init(void)
{
	input_register_handler(&evdev_handler);
	return 0;
}

static void __exit evdev_exit(void)
{
	input_unregister_handler(&evdev_handler);
}

module_init(evdev_init);
module_exit(evdev_exit);

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("Input driver event char devices");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Event char devices, giving access to raw input device events.
	3	*
	4	* Copyright (c) 1999-2002 Vojtech Pavlik
	5	*
	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.
	9	*/
	10
	11	#define EVDEV_MINOR_BASE 64
	12	#define EVDEV_MINORS 32
	13	#define EVDEV_BUFFER_SIZE 64
	14
	15	#include <linux/poll.h>
	16	#include <linux/slab.h>
	17	#include <linux/module.h>
	18	#include <linux/init.h>
	19	#include <linux/input.h>
	20	#include <linux/major.h>
	21	#include <linux/smp_lock.h>
	22	#include <linux/device.h>
52658bb6	23	#include <linux/compat.h>
1da177e4 LT	24
	25	struct evdev {
	26	int exist;
	27	int open;
	28	int minor;
	29	char name[16];
	30	struct input_handle handle;
	31	wait_queue_head_t wait;
	32	struct evdev_list *grab;
	33	struct list_head list;
	34	};
	35
	36	struct evdev_list {
	37	struct input_event buffer[EVDEV_BUFFER_SIZE];
	38	int head;
	39	int tail;
	40	struct fasync_struct *fasync;
	41	struct evdev *evdev;
	42	struct list_head node;
	43	};
	44
	45	static struct evdev *evdev_table[EVDEV_MINORS];
	46
	47	static void evdev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
	48	{
	49	struct evdev *evdev = handle->private;
	50	struct evdev_list *list;
	51
	52	if (evdev->grab) {
	53	list = evdev->grab;
	54
	55	do_gettimeofday(&list->buffer[list->head].time);
	56	list->buffer[list->head].type = type;
	57	list->buffer[list->head].code = code;
	58	list->buffer[list->head].value = value;
	59	list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1);
	60
	61	kill_fasync(&list->fasync, SIGIO, POLL_IN);
	62	} else
	63	list_for_each_entry(list, &evdev->list, node) {
	64
	65	do_gettimeofday(&list->buffer[list->head].time);
	66	list->buffer[list->head].type = type;
	67	list->buffer[list->head].code = code;
	68	list->buffer[list->head].value = value;
	69	list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1);
	70
	71	kill_fasync(&list->fasync, SIGIO, POLL_IN);
	72	}
	73
	74	wake_up_interruptible(&evdev->wait);
	75	}
	76
	77	static int evdev_fasync(int fd, struct file *file, int on)
	78	{
	79	int retval;
	80	struct evdev_list *list = file->private_data;
1e0afb28	81
1da177e4	82	retval = fasync_helper(fd, file, on, &list->fasync);
1e0afb28	83
1da177e4 LT	84	return retval < 0 ? retval : 0;
	85	}
	86
1e0afb28	87	static int evdev_flush(struct file *file, fl_owner_t id)
1da177e4 LT	88	{
1da177e4 LT	89	struct evdev_list *list = file->private_data;
1e0afb28 DT	90
	91	if (!list->evdev->exist)
	92	return -ENODEV;
	93
1da177e4 LT	94	return input_flush_device(&list->evdev->handle, file);
	95	}
	96
	97	static void evdev_free(struct evdev *evdev)
	98	{
	99	evdev_table[evdev->minor] = NULL;
	100	kfree(evdev);
	101	}
	102
	103	static int evdev_release(struct inode * inode, struct file * file)
	104	{
	105	struct evdev_list *list = file->private_data;
	106
	107	if (list->evdev->grab == list) {
	108	input_release_device(&list->evdev->handle);
	109	list->evdev->grab = NULL;
	110	}
	111
	112	evdev_fasync(-1, file, 0);
	113	list_del(&list->node);
	114
	115	if (!--list->evdev->open) {
	116	if (list->evdev->exist)
	117	input_close_device(&list->evdev->handle);
	118	else
	119	evdev_free(list->evdev);
	120	}
	121
	122	kfree(list);
	123	return 0;
	124	}
	125
	126	static int evdev_open(struct inode * inode, struct file * file)
	127	{
	128	struct evdev_list *list;
	129	int i = iminor(inode) - EVDEV_MINOR_BASE;
1da177e4 LT	130
	131	if (i >= EVDEV_MINORS \|\| !evdev_table[i] \|\| !evdev_table[i]->exist)
	132	return -ENODEV;
	133
b39787a9	134	if (!(list = kzalloc(sizeof(struct evdev_list), GFP_KERNEL)))
1da177e4	135	return -ENOMEM;
1da177e4 LT	136
	137	list->evdev = evdev_table[i];
	138	list_add_tail(&list->node, &evdev_table[i]->list);
	139	file->private_data = list;
	140
	141	if (!list->evdev->open++)
	142	if (list->evdev->exist)
	143	input_open_device(&list->evdev->handle);
	144
	145	return 0;
	146	}
	147
52658bb6	148	#ifdef CONFIG_COMPAT
3a51f7c4	149
52658bb6 JK	150	struct input_event_compat {
	151	struct compat_timeval time;
	152	__u16 type;
	153	__u16 code;
	154	__s32 value;
	155	};
	156
bf2fcc6f AK	157	/* Note to the author of this code: did it ever occur to
bf2fcc6f AK	158	you why the ifdefs are needed? Think about it again. -AK */
52658bb6	159	#ifdef CONFIG_X86_64
bf2fcc6f	160	# define COMPAT_TEST is_compat_task()
52658bb6	161	#elif defined(CONFIG_IA64)
6450578f	162	# define COMPAT_TEST IS_IA32_PROCESS(task_pt_regs(current))
347a8dc3	163	#elif defined(CONFIG_S390)
52658bb6	164	# define COMPAT_TEST test_thread_flag(TIF_31BIT)
59df6bbf RB	165	#elif defined(CONFIG_MIPS)
59df6bbf RB	166	# define COMPAT_TEST (current->thread.mflags & MF_32BIT_ADDR)
52658bb6 JK	167	#else
	168	# define COMPAT_TEST test_thread_flag(TIF_32BIT)
	169	#endif
	170
3a51f7c4	171	static inline size_t evdev_event_size(void)
52658bb6	172	{
3a51f7c4 DT	173	return COMPAT_TEST ?
	174	sizeof(struct input_event_compat) : sizeof(struct input_event);
	175	}
52658bb6	176
3a51f7c4 DT	177	static int evdev_event_from_user(const char __user buffer, struct input_event event)
	178	{
	179	if (COMPAT_TEST) {
	180	struct input_event_compat compat_event;
	181
	182	if (copy_from_user(&compat_event, buffer, sizeof(struct input_event_compat)))
	183	return -EFAULT;
	184
	185	event->time.tv_sec = compat_event.time.tv_sec;
	186	event->time.tv_usec = compat_event.time.tv_usec;
	187	event->type = compat_event.type;
	188	event->code = compat_event.code;
	189	event->value = compat_event.value;
	190
	191	} else {
	192	if (copy_from_user(event, buffer, sizeof(struct input_event)))
52658bb6	193	return -EFAULT;
52658bb6 JK	194	}
52658bb6 JK	195
3a51f7c4	196	return 0;
52658bb6	197	}
52658bb6	198
3a51f7c4	199	static int evdev_event_to_user(char __user buffer, const struct input_event event)
1da177e4	200	{
3a51f7c4 DT	201	if (COMPAT_TEST) {
3a51f7c4 DT	202	struct input_event_compat compat_event;
1da177e4	203
3a51f7c4 DT	204	compat_event.time.tv_sec = event->time.tv_sec;
	205	compat_event.time.tv_usec = event->time.tv_usec;
	206	compat_event.type = event->type;
	207	compat_event.code = event->code;
	208	compat_event.value = event->value;
52658bb6	209
3a51f7c4 DT	210	if (copy_to_user(buffer, &compat_event, sizeof(struct input_event_compat)))
3a51f7c4 DT	211	return -EFAULT;
1da177e4	212
3a51f7c4 DT	213	} else {
3a51f7c4 DT	214	if (copy_to_user(buffer, event, sizeof(struct input_event)))
1da177e4	215	return -EFAULT;
1da177e4 LT	216	}
1da177e4 LT	217
3a51f7c4	218	return 0;
1da177e4 LT	219	}
1da177e4 LT	220
3a51f7c4 DT	221	#else
	222
	223	static inline size_t evdev_event_size(void)
52658bb6	224	{
3a51f7c4 DT	225	return sizeof(struct input_event);
3a51f7c4 DT	226	}
52658bb6	227
3a51f7c4 DT	228	static int evdev_event_from_user(const char __user buffer, struct input_event event)
	229	{
	230	if (copy_from_user(event, buffer, sizeof(struct input_event)))
	231	return -EFAULT;
52658bb6	232
3a51f7c4 DT	233	return 0;
3a51f7c4 DT	234	}
52658bb6	235
3a51f7c4 DT	236	static int evdev_event_to_user(char __user buffer, const struct input_event event)
	237	{
	238	if (copy_to_user(buffer, event, sizeof(struct input_event)))
	239	return -EFAULT;
52658bb6	240
3a51f7c4 DT	241	return 0;
	242	}
	243
	244	#endif /* CONFIG_COMPAT */
	245
	246	static ssize_t evdev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
	247	{
	248	struct evdev_list *list = file->private_data;
	249	struct input_event event;
	250	int retval = 0;
52658bb6 JK	251
	252	if (!list->evdev->exist)
	253	return -ENODEV;
	254
3a51f7c4 DT	255	while (retval < count) {
	256
	257	if (evdev_event_from_user(buffer + retval, &event))
	258	return -EFAULT;
0e739d28	259	input_inject_event(&list->evdev->handle, event.type, event.code, event.value);
3a51f7c4	260	retval += evdev_event_size();
52658bb6 JK	261	}
	262
	263	return retval;
	264	}
52658bb6	265
1da177e4 LT	266	static ssize_t evdev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
	267	{
	268	struct evdev_list *list = file->private_data;
	269	int retval;
	270
3a51f7c4	271	if (count < evdev_event_size())
1da177e4 LT	272	return -EINVAL;
	273
	274	if (list->head == list->tail && list->evdev->exist && (file->f_flags & O_NONBLOCK))
	275	return -EAGAIN;
	276
	277	retval = wait_event_interruptible(list->evdev->wait,
	278	list->head != list->tail \|\| (!list->evdev->exist));
	279
	280	if (retval)
	281	return retval;
	282
	283	if (!list->evdev->exist)
	284	return -ENODEV;
	285
3a51f7c4 DT	286	while (list->head != list->tail && retval + evdev_event_size() <= count) {
	287
	288	struct input_event event = (struct input_event ) list->buffer + list->tail;
	289
	290	if (evdev_event_to_user(buffer + retval, event))
	291	return -EFAULT;
	292
1da177e4	293	list->tail = (list->tail + 1) & (EVDEV_BUFFER_SIZE - 1);
3a51f7c4	294	retval += evdev_event_size();
1da177e4 LT	295	}
	296
	297	return retval;
	298	}
	299
	300	/* No kernel lock - fine */
	301	static unsigned int evdev_poll(struct file file, poll_table wait)
	302	{
	303	struct evdev_list *list = file->private_data;
1e0afb28	304
1da177e4 LT	305	poll_wait(file, &list->evdev->wait, wait);
	306	return ((list->head == list->tail) ? 0 : (POLLIN \| POLLRDNORM)) \|
	307	(list->evdev->exist ? 0 : (POLLHUP \| POLLERR));
	308	}
	309
3a51f7c4 DT	310	#ifdef CONFIG_COMPAT
	311
	312	#define BITS_PER_LONG_COMPAT (sizeof(compat_long_t) * 8)
	313	#define NBITS_COMPAT(x) ((((x) - 1) / BITS_PER_LONG_COMPAT) + 1)
	314
	315	#ifdef __BIG_ENDIAN
	316	static int bits_to_user(unsigned long *bits, unsigned int maxbit,
	317	unsigned int maxlen, void __user *p, int compat)
	318	{
	319	int len, i;
	320
	321	if (compat) {
	322	len = NBITS_COMPAT(maxbit) * sizeof(compat_long_t);
	323	if (len < maxlen)
	324	len = maxlen;
	325
	326	for (i = 0; i < len / sizeof(compat_long_t); i++)
	327	if (copy_to_user((compat_long_t __user *) p + i,
	328	(compat_long_t *) bits +
	329	i + 1 - ((i % 2) << 1),
	330	sizeof(compat_long_t)))
	331	return -EFAULT;
	332	} else {
	333	len = NBITS(maxbit) * sizeof(long);
	334	if (len > maxlen)
	335	len = maxlen;
	336
	337	if (copy_to_user(p, bits, len))
	338	return -EFAULT;
	339	}
	340
	341	return len;
	342	}
	343	#else
	344	static int bits_to_user(unsigned long *bits, unsigned int maxbit,
	345	unsigned int maxlen, void __user *p, int compat)
	346	{
	347	int len = compat ?
	348	NBITS_COMPAT(maxbit) * sizeof(compat_long_t) :
	349	NBITS(maxbit) * sizeof(long);
	350
	351	if (len > maxlen)
	352	len = maxlen;
	353
	354	return copy_to_user(p, bits, len) ? -EFAULT : len;
	355	}
	356	#endif /* __BIG_ENDIAN */
	357
	358	#else
	359
	360	static int bits_to_user(unsigned long *bits, unsigned int maxbit,
	361	unsigned int maxlen, void __user *p, int compat)
	362	{
	363	int len = NBITS(maxbit) * sizeof(long);
	364
	365	if (len > maxlen)
	366	len = maxlen;
	367
	368	return copy_to_user(p, bits, len) ? -EFAULT : len;
	369	}
	370
	371	#endif /* CONFIG_COMPAT */
	372
	373	static int str_to_user(const char str, unsigned int maxlen, void __user p)
374	{
375	int len;
376
377	if (!str)
378	return -ENOENT;
379
380	len = strlen(str) + 1;
381	if (len > maxlen)
382	len = maxlen;
383
384	return copy_to_user(p, str, len) ? -EFAULT : len;
385	}
386
387	static long evdev_ioctl_handler(struct file *file, unsigned int cmd,
388	void __user *p, int compat_mode)
1da177e4 LT	389	{
	390	struct evdev_list *list = file->private_data;
	391	struct evdev *evdev = list->evdev;
	392	struct input_dev *dev = evdev->handle.dev;
	393	struct input_absinfo abs;
3a51f7c4	394	int __user ip = (int __user )p;
1da177e4 LT	395	int i, t, u, v;
1da177e4 LT	396
3a51f7c4 DT	397	if (!evdev->exist)
3a51f7c4 DT	398	return -ENODEV;
1da177e4 LT	399
	400	switch (cmd) {
	401
	402	case EVIOCGVERSION:
	403	return put_user(EV_VERSION, ip);
	404
	405	case EVIOCGID:
3a51f7c4 DT	406	if (copy_to_user(p, &dev->id, sizeof(struct input_id)))
3a51f7c4 DT	407	return -EFAULT;
08791e5c DT	408	return 0;
	409
	410	case EVIOCGREP:
	411	if (!test_bit(EV_REP, dev->evbit))
	412	return -ENOSYS;
	413	if (put_user(dev->rep[REP_DELAY], ip))
	414	return -EFAULT;
	415	if (put_user(dev->rep[REP_PERIOD], ip + 1))
	416	return -EFAULT;
	417	return 0;
	418
	419	case EVIOCSREP:
	420	if (!test_bit(EV_REP, dev->evbit))
	421	return -ENOSYS;
	422	if (get_user(u, ip))
	423	return -EFAULT;
	424	if (get_user(v, ip + 1))
	425	return -EFAULT;
	426
0e739d28 DT	427	input_inject_event(&evdev->handle, EV_REP, REP_DELAY, u);
0e739d28 DT	428	input_inject_event(&evdev->handle, EV_REP, REP_PERIOD, v);
3a51f7c4 DT	429
3a51f7c4 DT	430	return 0;
1da177e4 LT	431
1da177e4 LT	432	case EVIOCGKEYCODE:
3a51f7c4 DT	433	if (get_user(t, ip))
	434	return -EFAULT;
	435	if (t < 0 \|\| t >= dev->keycodemax \|\| !dev->keycodesize)
	436	return -EINVAL;
	437	if (put_user(INPUT_KEYCODE(dev, t), ip + 1))
	438	return -EFAULT;
1da177e4 LT	439	return 0;
	440
	441	case EVIOCSKEYCODE:
3a51f7c4 DT	442	if (get_user(t, ip))
	443	return -EFAULT;
	444	if (t < 0 \|\| t >= dev->keycodemax \|\| !dev->keycodesize)
	445	return -EINVAL;
	446	if (get_user(v, ip + 1))
	447	return -EFAULT;
	448	if (v < 0 \|\| v > KEY_MAX)
	449	return -EINVAL;
	450	if (dev->keycodesize < sizeof(v) && (v >> (dev->keycodesize * 8)))
	451	return -EINVAL;
	452
1da177e4 LT	453	u = SET_INPUT_KEYCODE(dev, t, v);
	454	clear_bit(u, dev->keybit);
	455	set_bit(v, dev->keybit);
	456	for (i = 0; i < dev->keycodemax; i++)
3a51f7c4	457	if (INPUT_KEYCODE(dev, i) == u)
1da177e4	458	set_bit(u, dev->keybit);
3a51f7c4	459
1da177e4 LT	460	return 0;
	461
	462	case EVIOCSFF:
	463	if (dev->upload_effect) {
	464	struct ff_effect effect;
	465	int err;
	466
	467	if (copy_from_user(&effect, p, sizeof(effect)))
	468	return -EFAULT;
	469	err = dev->upload_effect(dev, &effect);
3a51f7c4	470	if (put_user(effect.id, &(((struct ff_effect __user *)p)->id)))
1da177e4 LT	471	return -EFAULT;
1da177e4 LT	472	return err;
3a51f7c4 DT	473	} else
3a51f7c4 DT	474	return -ENOSYS;
1da177e4 LT	475
1da177e4 LT	476	case EVIOCRMFF:
3a51f7c4 DT	477	if (!dev->erase_effect)
	478	return -ENOSYS;
	479
	480	return dev->erase_effect(dev, (int)(unsigned long) p);
1da177e4 LT	481
	482	case EVIOCGEFFECTS:
	483	if (put_user(dev->ff_effects_max, ip))
	484	return -EFAULT;
	485	return 0;
	486
	487	case EVIOCGRAB:
3a51f7c4	488	if (p) {
1da177e4 LT	489	if (evdev->grab)
	490	return -EBUSY;
	491	if (input_grab_device(&evdev->handle))
	492	return -EBUSY;
	493	evdev->grab = list;
	494	return 0;
	495	} else {
	496	if (evdev->grab != list)
	497	return -EINVAL;
	498	input_release_device(&evdev->handle);
	499	evdev->grab = NULL;
	500	return 0;
	501	}
	502
	503	default:
	504
41e979f8	505	if (_IOC_TYPE(cmd) != 'E')
1da177e4 LT	506	return -EINVAL;
1da177e4 LT	507
41e979f8 VP	508	if (_IOC_DIR(cmd) == _IOC_READ) {
	509
	510	if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) {
	511
	512	long *bits;
	513	int len;
	514
	515	switch (_IOC_NR(cmd) & EV_MAX) {
	516	case 0: bits = dev->evbit; len = EV_MAX; break;
	517	case EV_KEY: bits = dev->keybit; len = KEY_MAX; break;
	518	case EV_REL: bits = dev->relbit; len = REL_MAX; break;
	519	case EV_ABS: bits = dev->absbit; len = ABS_MAX; break;
	520	case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break;
	521	case EV_LED: bits = dev->ledbit; len = LED_MAX; break;
	522	case EV_SND: bits = dev->sndbit; len = SND_MAX; break;
	523	case EV_FF: bits = dev->ffbit; len = FF_MAX; break;
31581066	524	case EV_SW: bits = dev->swbit; len = SW_MAX; break;
41e979f8 VP	525	default: return -EINVAL;
41e979f8 VP	526	}
3a51f7c4	527	return bits_to_user(bits, len, _IOC_SIZE(cmd), p, compat_mode);
1da177e4	528	}
1da177e4	529
3a51f7c4 DT	530	if (_IOC_NR(cmd) == _IOC_NR(EVIOCGKEY(0)))
	531	return bits_to_user(dev->key, KEY_MAX, _IOC_SIZE(cmd),
	532	p, compat_mode);
1da177e4	533
3a51f7c4 DT	534	if (_IOC_NR(cmd) == _IOC_NR(EVIOCGLED(0)))
	535	return bits_to_user(dev->led, LED_MAX, _IOC_SIZE(cmd),
	536	p, compat_mode);
1da177e4	537
3a51f7c4 DT	538	if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0)))
	539	return bits_to_user(dev->snd, SND_MAX, _IOC_SIZE(cmd),
	540	p, compat_mode);
1da177e4	541
3a51f7c4 DT	542	if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSW(0)))
	543	return bits_to_user(dev->sw, SW_MAX, _IOC_SIZE(cmd),
	544	p, compat_mode);
31581066	545
3a51f7c4 DT	546	if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0)))
3a51f7c4 DT	547	return str_to_user(dev->name, _IOC_SIZE(cmd), p);
1da177e4	548
3a51f7c4 DT	549	if (_IOC_NR(cmd) == _IOC_NR(EVIOCGPHYS(0)))
3a51f7c4 DT	550	return str_to_user(dev->phys, _IOC_SIZE(cmd), p);
1da177e4	551
3a51f7c4 DT	552	if (_IOC_NR(cmd) == _IOC_NR(EVIOCGUNIQ(0)))
3a51f7c4 DT	553	return str_to_user(dev->uniq, _IOC_SIZE(cmd), p);
1da177e4	554
41e979f8	555	if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) {
1da177e4	556
41e979f8	557	int t = _IOC_NR(cmd) & ABS_MAX;
1da177e4	558
41e979f8 VP	559	abs.value = dev->abs[t];
	560	abs.minimum = dev->absmin[t];
	561	abs.maximum = dev->absmax[t];
	562	abs.fuzz = dev->absfuzz[t];
	563	abs.flat = dev->absflat[t];
1da177e4	564
41e979f8 VP	565	if (copy_to_user(p, &abs, sizeof(struct input_absinfo)))
	566	return -EFAULT;
	567
	568	return 0;
	569	}
1da177e4	570
1da177e4 LT	571	}
1da177e4 LT	572
41e979f8	573	if (_IOC_DIR(cmd) == _IOC_WRITE) {
1da177e4	574
41e979f8	575	if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) {
1da177e4	576
41e979f8 VP	577	int t = _IOC_NR(cmd) & ABS_MAX;
	578
	579	if (copy_from_user(&abs, p, sizeof(struct input_absinfo)))
	580	return -EFAULT;
1da177e4	581
41e979f8 VP	582	dev->abs[t] = abs.value;
	583	dev->absmin[t] = abs.minimum;
	584	dev->absmax[t] = abs.maximum;
	585	dev->absfuzz[t] = abs.fuzz;
	586	dev->absflat[t] = abs.flat;
1da177e4	587
41e979f8 VP	588	return 0;
41e979f8 VP	589	}
1da177e4	590	}
1da177e4 LT	591	}
	592	return -EINVAL;
	593	}
1da177e4	594
3a51f7c4 DT	595	static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
	596	{
	597	return evdev_ioctl_handler(file, cmd, (void __user *)arg, 0);
	598	}
41e979f8	599
3a51f7c4	600	#ifdef CONFIG_COMPAT
52658bb6 JK	601	static long evdev_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
52658bb6 JK	602	{
3a51f7c4	603	return evdev_ioctl_handler(file, cmd, compat_ptr(arg), 1);
1da177e4	604	}
52658bb6	605	#endif
1da177e4 LT	606
	607	static struct file_operations evdev_fops = {
	608	.owner = THIS_MODULE,
	609	.read = evdev_read,
	610	.write = evdev_write,
	611	.poll = evdev_poll,
	612	.open = evdev_open,
	613	.release = evdev_release,
52658bb6 JK	614	.unlocked_ioctl = evdev_ioctl,
	615	#ifdef CONFIG_COMPAT
	616	.compat_ioctl = evdev_ioctl_compat,
	617	#endif
1da177e4 LT	618	.fasync = evdev_fasync,
	619	.flush = evdev_flush
	620	};
	621
	622	static struct input_handle evdev_connect(struct input_handler handler, struct input_dev dev, struct input_device_id id)
	623	{
	624	struct evdev *evdev;
c9bcd582	625	struct class_device *cdev;
1da177e4 LT	626	int minor;
	627
	628	for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++);
	629	if (minor == EVDEV_MINORS) {
	630	printk(KERN_ERR "evdev: no more free evdev devices\n");
	631	return NULL;
	632	}
	633
b39787a9	634	if (!(evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL)))
1da177e4	635	return NULL;
1da177e4 LT	636
	637	INIT_LIST_HEAD(&evdev->list);
	638	init_waitqueue_head(&evdev->wait);
	639
	640	evdev->exist = 1;
	641	evdev->minor = minor;
	642	evdev->handle.dev = dev;
	643	evdev->handle.name = evdev->name;
	644	evdev->handle.handler = handler;
	645	evdev->handle.private = evdev;
	646	sprintf(evdev->name, "event%d", minor);
	647
	648	evdev_table[minor] = evdev;
	649
c9bcd582	650	cdev = class_device_create(&input_class, &dev->cdev,
1235686f	651	MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor),
c9bcd582 GKH	652	dev->cdev.dev, evdev->name);
	653
	654	/* temporary symlink to keep userspace happy */
	655	sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
	656	evdev->name);
1da177e4 LT	657
	658	return &evdev->handle;
	659	}
	660
	661	static void evdev_disconnect(struct input_handle *handle)
	662	{
	663	struct evdev *evdev = handle->private;
	664	struct evdev_list *list;
	665
c9bcd582	666	sysfs_remove_link(&input_class.subsys.kset.kobj, evdev->name);
ea9f240b	667	class_device_destroy(&input_class,
1235686f	668	MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + evdev->minor));
1da177e4 LT	669	evdev->exist = 0;
	670
	671	if (evdev->open) {
	672	input_close_device(handle);
	673	wake_up_interruptible(&evdev->wait);
	674	list_for_each_entry(list, &evdev->list, node)
	675	kill_fasync(&list->fasync, SIGIO, POLL_HUP);
	676	} else
	677	evdev_free(evdev);
	678	}
	679
	680	static struct input_device_id evdev_ids[] = {
	681	{ .driver_info = 1 }, /* Matches all devices */
	682	{ }, /* Terminating zero entry */
	683	};
	684
	685	MODULE_DEVICE_TABLE(input, evdev_ids);
	686
	687	static struct input_handler evdev_handler = {
	688	.event = evdev_event,
	689	.connect = evdev_connect,
	690	.disconnect = evdev_disconnect,
	691	.fops = &evdev_fops,
	692	.minor = EVDEV_MINOR_BASE,
	693	.name = "evdev",
	694	.id_table = evdev_ids,
	695	};
	696
	697	static int __init evdev_init(void)
	698	{
	699	input_register_handler(&evdev_handler);
	700	return 0;
	701	}
	702
	703	static void __exit evdev_exit(void)
	704	{
	705	input_unregister_handler(&evdev_handler);
	706	}
	707
	708	module_init(evdev_init);
	709	module_exit(evdev_exit);
	710
	711	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	712	MODULE_DESCRIPTION("Input driver event char devices");
	713	MODULE_LICENSE("GPL");