[mirror_ubuntu-artful-kernel.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;
	int accept_err;

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

	if ((accept_err = input_accept_process(&(evdev_table[i]->handle), file)))
		return accept_err;

	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_event(list->evdev->handle.dev, 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_event(dev, EV_REP, REP_DELAY, u);
			input_event(dev, 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;
	130	int accept_err;
	131
	132	if (i >= EVDEV_MINORS \|\| !evdev_table[i] \|\| !evdev_table[i]->exist)
	133	return -ENODEV;
	134
	135	if ((accept_err = input_accept_process(&(evdev_table[i]->handle), file)))
	136	return accept_err;
	137
b39787a9	138	if (!(list = kzalloc(sizeof(struct evdev_list), GFP_KERNEL)))
1da177e4	139	return -ENOMEM;
1da177e4 LT	140
	141	list->evdev = evdev_table[i];
	142	list_add_tail(&list->node, &evdev_table[i]->list);
	143	file->private_data = list;
	144
	145	if (!list->evdev->open++)
	146	if (list->evdev->exist)
	147	input_open_device(&list->evdev->handle);
	148
	149	return 0;
	150	}
	151
52658bb6	152	#ifdef CONFIG_COMPAT
3a51f7c4	153
52658bb6 JK	154	struct input_event_compat {
	155	struct compat_timeval time;
	156	__u16 type;
	157	__u16 code;
	158	__s32 value;
	159	};
	160
bf2fcc6f AK	161	/* Note to the author of this code: did it ever occur to
bf2fcc6f AK	162	you why the ifdefs are needed? Think about it again. -AK */
52658bb6	163	#ifdef CONFIG_X86_64
bf2fcc6f	164	# define COMPAT_TEST is_compat_task()
52658bb6	165	#elif defined(CONFIG_IA64)
6450578f	166	# define COMPAT_TEST IS_IA32_PROCESS(task_pt_regs(current))
347a8dc3	167	#elif defined(CONFIG_S390)
52658bb6	168	# define COMPAT_TEST test_thread_flag(TIF_31BIT)
59df6bbf RB	169	#elif defined(CONFIG_MIPS)
59df6bbf RB	170	# define COMPAT_TEST (current->thread.mflags & MF_32BIT_ADDR)
52658bb6 JK	171	#else
	172	# define COMPAT_TEST test_thread_flag(TIF_32BIT)
	173	#endif
	174
3a51f7c4	175	static inline size_t evdev_event_size(void)
52658bb6	176	{
3a51f7c4 DT	177	return COMPAT_TEST ?
	178	sizeof(struct input_event_compat) : sizeof(struct input_event);
	179	}
52658bb6	180
3a51f7c4 DT	181	static int evdev_event_from_user(const char __user buffer, struct input_event event)
	182	{
	183	if (COMPAT_TEST) {
	184	struct input_event_compat compat_event;
	185
	186	if (copy_from_user(&compat_event, buffer, sizeof(struct input_event_compat)))
	187	return -EFAULT;
	188
	189	event->time.tv_sec = compat_event.time.tv_sec;
	190	event->time.tv_usec = compat_event.time.tv_usec;
	191	event->type = compat_event.type;
	192	event->code = compat_event.code;
	193	event->value = compat_event.value;
	194
	195	} else {
	196	if (copy_from_user(event, buffer, sizeof(struct input_event)))
52658bb6	197	return -EFAULT;
52658bb6 JK	198	}
52658bb6 JK	199
3a51f7c4	200	return 0;
52658bb6	201	}
52658bb6	202
3a51f7c4	203	static int evdev_event_to_user(char __user buffer, const struct input_event event)
1da177e4	204	{
3a51f7c4 DT	205	if (COMPAT_TEST) {
3a51f7c4 DT	206	struct input_event_compat compat_event;
1da177e4	207
3a51f7c4 DT	208	compat_event.time.tv_sec = event->time.tv_sec;
	209	compat_event.time.tv_usec = event->time.tv_usec;
	210	compat_event.type = event->type;
	211	compat_event.code = event->code;
	212	compat_event.value = event->value;
52658bb6	213
3a51f7c4 DT	214	if (copy_to_user(buffer, &compat_event, sizeof(struct input_event_compat)))
3a51f7c4 DT	215	return -EFAULT;
1da177e4	216
3a51f7c4 DT	217	} else {
3a51f7c4 DT	218	if (copy_to_user(buffer, event, sizeof(struct input_event)))
1da177e4	219	return -EFAULT;
1da177e4 LT	220	}
1da177e4 LT	221
3a51f7c4	222	return 0;
1da177e4 LT	223	}
1da177e4 LT	224
3a51f7c4 DT	225	#else
	226
	227	static inline size_t evdev_event_size(void)
52658bb6	228	{
3a51f7c4 DT	229	return sizeof(struct input_event);
3a51f7c4 DT	230	}
52658bb6	231
3a51f7c4 DT	232	static int evdev_event_from_user(const char __user buffer, struct input_event event)
	233	{
	234	if (copy_from_user(event, buffer, sizeof(struct input_event)))
	235	return -EFAULT;
52658bb6	236
3a51f7c4 DT	237	return 0;
3a51f7c4 DT	238	}
52658bb6	239
3a51f7c4 DT	240	static int evdev_event_to_user(char __user buffer, const struct input_event event)
	241	{
	242	if (copy_to_user(buffer, event, sizeof(struct input_event)))
	243	return -EFAULT;
52658bb6	244
3a51f7c4 DT	245	return 0;
	246	}
	247
	248	#endif /* CONFIG_COMPAT */
	249
	250	static ssize_t evdev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
	251	{
	252	struct evdev_list *list = file->private_data;
	253	struct input_event event;
	254	int retval = 0;
52658bb6 JK	255
	256	if (!list->evdev->exist)
	257	return -ENODEV;
	258
3a51f7c4 DT	259	while (retval < count) {
	260
	261	if (evdev_event_from_user(buffer + retval, &event))
	262	return -EFAULT;
	263	input_event(list->evdev->handle.dev, event.type, event.code, event.value);
	264	retval += evdev_event_size();
52658bb6 JK	265	}
	266
	267	return retval;
	268	}
52658bb6	269
1da177e4 LT	270	static ssize_t evdev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
	271	{
	272	struct evdev_list *list = file->private_data;
	273	int retval;
	274
3a51f7c4	275	if (count < evdev_event_size())
1da177e4 LT	276	return -EINVAL;
	277
	278	if (list->head == list->tail && list->evdev->exist && (file->f_flags & O_NONBLOCK))
	279	return -EAGAIN;
	280
	281	retval = wait_event_interruptible(list->evdev->wait,
	282	list->head != list->tail \|\| (!list->evdev->exist));
	283
	284	if (retval)
	285	return retval;
	286
	287	if (!list->evdev->exist)
	288	return -ENODEV;
	289
3a51f7c4 DT	290	while (list->head != list->tail && retval + evdev_event_size() <= count) {
	291
	292	struct input_event event = (struct input_event ) list->buffer + list->tail;
	293
	294	if (evdev_event_to_user(buffer + retval, event))
	295	return -EFAULT;
	296
1da177e4	297	list->tail = (list->tail + 1) & (EVDEV_BUFFER_SIZE - 1);
3a51f7c4	298	retval += evdev_event_size();
1da177e4 LT	299	}
	300
	301	return retval;
	302	}
	303
	304	/* No kernel lock - fine */
	305	static unsigned int evdev_poll(struct file file, poll_table wait)
	306	{
	307	struct evdev_list *list = file->private_data;
1e0afb28	308
1da177e4 LT	309	poll_wait(file, &list->evdev->wait, wait);
	310	return ((list->head == list->tail) ? 0 : (POLLIN \| POLLRDNORM)) \|
	311	(list->evdev->exist ? 0 : (POLLHUP \| POLLERR));
	312	}
	313
3a51f7c4 DT	314	#ifdef CONFIG_COMPAT
	315
	316	#define BITS_PER_LONG_COMPAT (sizeof(compat_long_t) * 8)
	317	#define NBITS_COMPAT(x) ((((x) - 1) / BITS_PER_LONG_COMPAT) + 1)
	318
	319	#ifdef __BIG_ENDIAN
	320	static int bits_to_user(unsigned long *bits, unsigned int maxbit,
	321	unsigned int maxlen, void __user *p, int compat)
	322	{
	323	int len, i;
	324
	325	if (compat) {
	326	len = NBITS_COMPAT(maxbit) * sizeof(compat_long_t);
	327	if (len < maxlen)
	328	len = maxlen;
	329
	330	for (i = 0; i < len / sizeof(compat_long_t); i++)
	331	if (copy_to_user((compat_long_t __user *) p + i,
	332	(compat_long_t *) bits +
	333	i + 1 - ((i % 2) << 1),
	334	sizeof(compat_long_t)))
	335	return -EFAULT;
	336	} else {
	337	len = NBITS(maxbit) * sizeof(long);
	338	if (len > maxlen)
	339	len = maxlen;
	340
	341	if (copy_to_user(p, bits, len))
	342	return -EFAULT;
	343	}
	344
	345	return len;
	346	}
	347	#else
	348	static int bits_to_user(unsigned long *bits, unsigned int maxbit,
	349	unsigned int maxlen, void __user *p, int compat)
	350	{
	351	int len = compat ?
	352	NBITS_COMPAT(maxbit) * sizeof(compat_long_t) :
	353	NBITS(maxbit) * sizeof(long);
	354
	355	if (len > maxlen)
	356	len = maxlen;
	357
	358	return copy_to_user(p, bits, len) ? -EFAULT : len;
	359	}
	360	#endif /* __BIG_ENDIAN */
	361
	362	#else
	363
	364	static int bits_to_user(unsigned long *bits, unsigned int maxbit,
	365	unsigned int maxlen, void __user *p, int compat)
	366	{
	367	int len = NBITS(maxbit) * sizeof(long);
	368
	369	if (len > maxlen)
	370	len = maxlen;
	371
	372	return copy_to_user(p, bits, len) ? -EFAULT : len;
	373	}
	374
	375	#endif /* CONFIG_COMPAT */
	376
	377	static int str_to_user(const char str, unsigned int maxlen, void __user p)
378	{
379	int len;
380
381	if (!str)
382	return -ENOENT;
383
384	len = strlen(str) + 1;
385	if (len > maxlen)
386	len = maxlen;
387
388	return copy_to_user(p, str, len) ? -EFAULT : len;
389	}
390
391	static long evdev_ioctl_handler(struct file *file, unsigned int cmd,
392	void __user *p, int compat_mode)
1da177e4 LT	393	{
	394	struct evdev_list *list = file->private_data;
	395	struct evdev *evdev = list->evdev;
	396	struct input_dev *dev = evdev->handle.dev;
	397	struct input_absinfo abs;
3a51f7c4	398	int __user ip = (int __user )p;
1da177e4 LT	399	int i, t, u, v;
1da177e4 LT	400
3a51f7c4 DT	401	if (!evdev->exist)
3a51f7c4 DT	402	return -ENODEV;
1da177e4 LT	403
	404	switch (cmd) {
	405
	406	case EVIOCGVERSION:
	407	return put_user(EV_VERSION, ip);
	408
	409	case EVIOCGID:
3a51f7c4 DT	410	if (copy_to_user(p, &dev->id, sizeof(struct input_id)))
3a51f7c4 DT	411	return -EFAULT;
08791e5c DT	412	return 0;
	413
	414	case EVIOCGREP:
	415	if (!test_bit(EV_REP, dev->evbit))
	416	return -ENOSYS;
	417	if (put_user(dev->rep[REP_DELAY], ip))
	418	return -EFAULT;
	419	if (put_user(dev->rep[REP_PERIOD], ip + 1))
	420	return -EFAULT;
	421	return 0;
	422
	423	case EVIOCSREP:
	424	if (!test_bit(EV_REP, dev->evbit))
	425	return -ENOSYS;
	426	if (get_user(u, ip))
	427	return -EFAULT;
	428	if (get_user(v, ip + 1))
	429	return -EFAULT;
	430
	431	input_event(dev, EV_REP, REP_DELAY, u);
	432	input_event(dev, EV_REP, REP_PERIOD, v);
3a51f7c4 DT	433
3a51f7c4 DT	434	return 0;
1da177e4 LT	435
1da177e4 LT	436	case EVIOCGKEYCODE:
3a51f7c4 DT	437	if (get_user(t, ip))
	438	return -EFAULT;
	439	if (t < 0 \|\| t >= dev->keycodemax \|\| !dev->keycodesize)
	440	return -EINVAL;
	441	if (put_user(INPUT_KEYCODE(dev, t), ip + 1))
	442	return -EFAULT;
1da177e4 LT	443	return 0;
	444
	445	case EVIOCSKEYCODE:
3a51f7c4 DT	446	if (get_user(t, ip))
	447	return -EFAULT;
	448	if (t < 0 \|\| t >= dev->keycodemax \|\| !dev->keycodesize)
	449	return -EINVAL;
	450	if (get_user(v, ip + 1))
	451	return -EFAULT;
	452	if (v < 0 \|\| v > KEY_MAX)
	453	return -EINVAL;
	454	if (dev->keycodesize < sizeof(v) && (v >> (dev->keycodesize * 8)))
	455	return -EINVAL;
	456
1da177e4 LT	457	u = SET_INPUT_KEYCODE(dev, t, v);
	458	clear_bit(u, dev->keybit);
	459	set_bit(v, dev->keybit);
	460	for (i = 0; i < dev->keycodemax; i++)
3a51f7c4	461	if (INPUT_KEYCODE(dev, i) == u)
1da177e4	462	set_bit(u, dev->keybit);
3a51f7c4	463
1da177e4 LT	464	return 0;
	465
	466	case EVIOCSFF:
	467	if (dev->upload_effect) {
	468	struct ff_effect effect;
	469	int err;
	470
	471	if (copy_from_user(&effect, p, sizeof(effect)))
	472	return -EFAULT;
	473	err = dev->upload_effect(dev, &effect);
3a51f7c4	474	if (put_user(effect.id, &(((struct ff_effect __user *)p)->id)))
1da177e4 LT	475	return -EFAULT;
1da177e4 LT	476	return err;
3a51f7c4 DT	477	} else
3a51f7c4 DT	478	return -ENOSYS;
1da177e4 LT	479
1da177e4 LT	480	case EVIOCRMFF:
3a51f7c4 DT	481	if (!dev->erase_effect)
	482	return -ENOSYS;
	483
	484	return dev->erase_effect(dev, (int)(unsigned long) p);
1da177e4 LT	485
	486	case EVIOCGEFFECTS:
	487	if (put_user(dev->ff_effects_max, ip))
	488	return -EFAULT;
	489	return 0;
	490
	491	case EVIOCGRAB:
3a51f7c4	492	if (p) {
1da177e4 LT	493	if (evdev->grab)
	494	return -EBUSY;
	495	if (input_grab_device(&evdev->handle))
	496	return -EBUSY;
	497	evdev->grab = list;
	498	return 0;
	499	} else {
	500	if (evdev->grab != list)
	501	return -EINVAL;
	502	input_release_device(&evdev->handle);
	503	evdev->grab = NULL;
	504	return 0;
	505	}
	506
	507	default:
	508
41e979f8	509	if (_IOC_TYPE(cmd) != 'E')
1da177e4 LT	510	return -EINVAL;
1da177e4 LT	511
41e979f8 VP	512	if (_IOC_DIR(cmd) == _IOC_READ) {
	513
	514	if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) {
	515
	516	long *bits;
	517	int len;
	518
	519	switch (_IOC_NR(cmd) & EV_MAX) {
	520	case 0: bits = dev->evbit; len = EV_MAX; break;
	521	case EV_KEY: bits = dev->keybit; len = KEY_MAX; break;
	522	case EV_REL: bits = dev->relbit; len = REL_MAX; break;
	523	case EV_ABS: bits = dev->absbit; len = ABS_MAX; break;
	524	case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break;
	525	case EV_LED: bits = dev->ledbit; len = LED_MAX; break;
	526	case EV_SND: bits = dev->sndbit; len = SND_MAX; break;
	527	case EV_FF: bits = dev->ffbit; len = FF_MAX; break;
31581066	528	case EV_SW: bits = dev->swbit; len = SW_MAX; break;
41e979f8 VP	529	default: return -EINVAL;
41e979f8 VP	530	}
3a51f7c4	531	return bits_to_user(bits, len, _IOC_SIZE(cmd), p, compat_mode);
1da177e4	532	}
1da177e4	533
3a51f7c4 DT	534	if (_IOC_NR(cmd) == _IOC_NR(EVIOCGKEY(0)))
	535	return bits_to_user(dev->key, KEY_MAX, _IOC_SIZE(cmd),
	536	p, compat_mode);
1da177e4	537
3a51f7c4 DT	538	if (_IOC_NR(cmd) == _IOC_NR(EVIOCGLED(0)))
	539	return bits_to_user(dev->led, LED_MAX, _IOC_SIZE(cmd),
	540	p, compat_mode);
1da177e4	541
3a51f7c4 DT	542	if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0)))
	543	return bits_to_user(dev->snd, SND_MAX, _IOC_SIZE(cmd),
	544	p, compat_mode);
1da177e4	545
3a51f7c4 DT	546	if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSW(0)))
	547	return bits_to_user(dev->sw, SW_MAX, _IOC_SIZE(cmd),
	548	p, compat_mode);
31581066	549
3a51f7c4 DT	550	if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0)))
3a51f7c4 DT	551	return str_to_user(dev->name, _IOC_SIZE(cmd), p);
1da177e4	552
3a51f7c4 DT	553	if (_IOC_NR(cmd) == _IOC_NR(EVIOCGPHYS(0)))
3a51f7c4 DT	554	return str_to_user(dev->phys, _IOC_SIZE(cmd), p);
1da177e4	555
3a51f7c4 DT	556	if (_IOC_NR(cmd) == _IOC_NR(EVIOCGUNIQ(0)))
3a51f7c4 DT	557	return str_to_user(dev->uniq, _IOC_SIZE(cmd), p);
1da177e4	558
41e979f8	559	if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) {
1da177e4	560
41e979f8	561	int t = _IOC_NR(cmd) & ABS_MAX;
1da177e4	562
41e979f8 VP	563	abs.value = dev->abs[t];
	564	abs.minimum = dev->absmin[t];
	565	abs.maximum = dev->absmax[t];
	566	abs.fuzz = dev->absfuzz[t];
	567	abs.flat = dev->absflat[t];
1da177e4	568
41e979f8 VP	569	if (copy_to_user(p, &abs, sizeof(struct input_absinfo)))
	570	return -EFAULT;
	571
	572	return 0;
	573	}
1da177e4	574
1da177e4 LT	575	}
1da177e4 LT	576
41e979f8	577	if (_IOC_DIR(cmd) == _IOC_WRITE) {
1da177e4	578
41e979f8	579	if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) {
1da177e4	580
41e979f8 VP	581	int t = _IOC_NR(cmd) & ABS_MAX;
	582
	583	if (copy_from_user(&abs, p, sizeof(struct input_absinfo)))
	584	return -EFAULT;
1da177e4	585
41e979f8 VP	586	dev->abs[t] = abs.value;
	587	dev->absmin[t] = abs.minimum;
	588	dev->absmax[t] = abs.maximum;
	589	dev->absfuzz[t] = abs.fuzz;
	590	dev->absflat[t] = abs.flat;
1da177e4	591
41e979f8 VP	592	return 0;
41e979f8 VP	593	}
1da177e4	594	}
1da177e4 LT	595	}
	596	return -EINVAL;
	597	}
1da177e4	598
3a51f7c4 DT	599	static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
	600	{
	601	return evdev_ioctl_handler(file, cmd, (void __user *)arg, 0);
	602	}
41e979f8	603
3a51f7c4	604	#ifdef CONFIG_COMPAT
52658bb6 JK	605	static long evdev_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
52658bb6 JK	606	{
3a51f7c4	607	return evdev_ioctl_handler(file, cmd, compat_ptr(arg), 1);
1da177e4	608	}
52658bb6	609	#endif
1da177e4 LT	610
	611	static struct file_operations evdev_fops = {
	612	.owner = THIS_MODULE,
	613	.read = evdev_read,
	614	.write = evdev_write,
	615	.poll = evdev_poll,
	616	.open = evdev_open,
	617	.release = evdev_release,
52658bb6 JK	618	.unlocked_ioctl = evdev_ioctl,
	619	#ifdef CONFIG_COMPAT
	620	.compat_ioctl = evdev_ioctl_compat,
	621	#endif
1da177e4 LT	622	.fasync = evdev_fasync,
	623	.flush = evdev_flush
	624	};
	625
	626	static struct input_handle evdev_connect(struct input_handler handler, struct input_dev dev, struct input_device_id id)
	627	{
	628	struct evdev *evdev;
c9bcd582	629	struct class_device *cdev;
1da177e4 LT	630	int minor;
	631
	632	for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++);
	633	if (minor == EVDEV_MINORS) {
	634	printk(KERN_ERR "evdev: no more free evdev devices\n");
	635	return NULL;
	636	}
	637
b39787a9	638	if (!(evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL)))
1da177e4	639	return NULL;
1da177e4 LT	640
	641	INIT_LIST_HEAD(&evdev->list);
	642	init_waitqueue_head(&evdev->wait);
	643
	644	evdev->exist = 1;
	645	evdev->minor = minor;
	646	evdev->handle.dev = dev;
	647	evdev->handle.name = evdev->name;
	648	evdev->handle.handler = handler;
	649	evdev->handle.private = evdev;
	650	sprintf(evdev->name, "event%d", minor);
	651
	652	evdev_table[minor] = evdev;
	653
c9bcd582	654	cdev = class_device_create(&input_class, &dev->cdev,
1235686f	655	MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor),
c9bcd582 GKH	656	dev->cdev.dev, evdev->name);
	657
	658	/* temporary symlink to keep userspace happy */
	659	sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
	660	evdev->name);
1da177e4 LT	661
	662	return &evdev->handle;
	663	}
	664
	665	static void evdev_disconnect(struct input_handle *handle)
	666	{
	667	struct evdev *evdev = handle->private;
	668	struct evdev_list *list;
	669
c9bcd582	670	sysfs_remove_link(&input_class.subsys.kset.kobj, evdev->name);
ea9f240b	671	class_device_destroy(&input_class,
1235686f	672	MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + evdev->minor));
1da177e4 LT	673	evdev->exist = 0;
	674
	675	if (evdev->open) {
	676	input_close_device(handle);
	677	wake_up_interruptible(&evdev->wait);
	678	list_for_each_entry(list, &evdev->list, node)
	679	kill_fasync(&list->fasync, SIGIO, POLL_HUP);
	680	} else
	681	evdev_free(evdev);
	682	}
	683
	684	static struct input_device_id evdev_ids[] = {
	685	{ .driver_info = 1 }, /* Matches all devices */
	686	{ }, /* Terminating zero entry */
	687	};
	688
	689	MODULE_DEVICE_TABLE(input, evdev_ids);
	690
	691	static struct input_handler evdev_handler = {
	692	.event = evdev_event,
	693	.connect = evdev_connect,
	694	.disconnect = evdev_disconnect,
	695	.fops = &evdev_fops,
	696	.minor = EVDEV_MINOR_BASE,
	697	.name = "evdev",
	698	.id_table = evdev_ids,
	699	};
	700
	701	static int __init evdev_init(void)
	702	{
	703	input_register_handler(&evdev_handler);
	704	return 0;
	705	}
	706
	707	static void __exit evdev_exit(void)
	708	{
	709	input_unregister_handler(&evdev_handler);
	710	}
	711
	712	module_init(evdev_init);
	713	module_exit(evdev_exit);
	714
	715	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	716	MODULE_DESCRIPTION("Input driver event char devices");
	717	MODULE_LICENSE("GPL");