[mirror_ubuntu-artful-kernel.git] / drivers / hid / hidraw.c

/*
 * HID raw devices, giving access to raw HID events.
 *
 * In comparison to hiddev, this device does not process the
 * hid events at all (no parsing, no lookups). This lets applications
 * to work on raw hid events as they want to, and avoids a need to
 * use a transport-specific userspace libhid/libusb libraries.
 *
 *  Copyright (c) 2007 Jiri Kosina
 */

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <linux/fs.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/cdev.h>
#include <linux/poll.h>
#include <linux/device.h>
#include <linux/major.h>
#include <linux/hid.h>
#include <linux/mutex.h>
#include <linux/smp_lock.h>

#include <linux/hidraw.h>

static int hidraw_major;
static struct cdev hidraw_cdev;
static struct class *hidraw_class;
static struct hidraw *hidraw_table[HIDRAW_MAX_DEVICES];
static DEFINE_SPINLOCK(minors_lock);

static ssize_t hidraw_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
{
	struct hidraw_list *list = file->private_data;
	int ret = 0, len;
	char *report;
	DECLARE_WAITQUEUE(wait, current);

	while (ret == 0) {

		mutex_lock(&list->read_mutex);

		if (list->head == list->tail) {
			add_wait_queue(&list->hidraw->wait, &wait);
			set_current_state(TASK_INTERRUPTIBLE);

			while (list->head == list->tail) {
				if (file->f_flags & O_NONBLOCK) {
					ret = -EAGAIN;
					break;
				}
				if (signal_pending(current)) {
					ret = -ERESTARTSYS;
					break;
				}
				if (!list->hidraw->exist) {
					ret = -EIO;
					break;
				}

				/* allow O_NONBLOCK to work well from other threads */
				mutex_unlock(&list->read_mutex);
				schedule();
				mutex_lock(&list->read_mutex);
				set_current_state(TASK_INTERRUPTIBLE);
			}

			set_current_state(TASK_RUNNING);
			remove_wait_queue(&list->hidraw->wait, &wait);
		}

		if (ret)
			goto out;

		report = list->buffer[list->tail].value;
		len = list->buffer[list->tail].len > count ?
			count : list->buffer[list->tail].len;

		if (copy_to_user(buffer, list->buffer[list->tail].value, len)) {
			ret = -EFAULT;
			goto out;
		}
		ret += len;

		kfree(list->buffer[list->tail].value);
		list->tail = (list->tail + 1) & (HIDRAW_BUFFER_SIZE - 1);
	}
out:
	mutex_unlock(&list->read_mutex);
	return ret;
}

/* the first byte is expected to be a report number */
static ssize_t hidraw_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
{
	unsigned int minor = iminor(file->f_path.dentry->d_inode);
	/* FIXME: What stops hidraw_table going NULL */
	struct hid_device *dev = hidraw_table[minor]->hid;
	__u8 *buf;
	int ret = 0;

	if (!dev->hid_output_raw_report)
		return -ENODEV;

	if (count > HID_MAX_BUFFER_SIZE) {
		printk(KERN_WARNING "hidraw: pid %d passed too large report\n",
				task_pid_nr(current));
		return -EINVAL;
	}

	if (count < 2) {
		printk(KERN_WARNING "hidraw: pid %d passed too short report\n",
				task_pid_nr(current));
		return -EINVAL;
	}

	buf = kmalloc(count * sizeof(__u8), GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	if (copy_from_user(buf, buffer, count)) {
		ret = -EFAULT;
		goto out;
	}

	ret = dev->hid_output_raw_report(dev, buf, count);
out:
	kfree(buf);
	return ret;
}

static unsigned int hidraw_poll(struct file *file, poll_table *wait)
{
	struct hidraw_list *list = file->private_data;

	poll_wait(file, &list->hidraw->wait, wait);
	if (list->head != list->tail)
		return POLLIN | POLLRDNORM;
	if (!list->hidraw->exist)
		return POLLERR | POLLHUP;
	return 0;
}

static int hidraw_open(struct inode *inode, struct file *file)
{
	unsigned int minor = iminor(inode);
	struct hidraw *dev;
	struct hidraw_list *list;
	int err = 0;

	lock_kernel();
	if (!(list = kzalloc(sizeof(struct hidraw_list), GFP_KERNEL))) {
		err = -ENOMEM;
		goto out;
	}

	spin_lock(&minors_lock);
	if (!hidraw_table[minor]) {
		printk(KERN_EMERG "hidraw device with minor %d doesn't exist\n",
				minor);
		kfree(list);
		err = -ENODEV;
		goto out_unlock;
	}

	list->hidraw = hidraw_table[minor];
	mutex_init(&list->read_mutex);
	list_add_tail(&list->node, &hidraw_table[minor]->list);
	file->private_data = list;

	dev = hidraw_table[minor];
	if (!dev->open++)
		dev->hid->ll_driver->open(dev->hid);

out_unlock:
	spin_unlock(&minors_lock);
out:
	unlock_kernel();
	return err;

}

static int hidraw_release(struct inode * inode, struct file * file)
{
	unsigned int minor = iminor(inode);
	struct hidraw *dev;
	struct hidraw_list *list = file->private_data;

	if (!hidraw_table[minor]) {
		printk(KERN_EMERG "hidraw device with minor %d doesn't exist\n",
				minor);
		return -ENODEV;
	}

	list_del(&list->node);
	dev = hidraw_table[minor];
	if (!dev->open--) {
		if (list->hidraw->exist)
			dev->hid->ll_driver->close(dev->hid);
		else
			kfree(list->hidraw);
	}

	kfree(list);

	return 0;
}

static long hidraw_ioctl(struct file *file, unsigned int cmd,
							unsigned long arg)
{
	struct inode *inode = file->f_path.dentry->d_inode;
	unsigned int minor = iminor(inode);
	long ret = 0;
	/* FIXME: What stops hidraw_table going NULL */
	struct hidraw *dev = hidraw_table[minor];
	void __user *user_arg = (void __user*) arg;

	lock_kernel();
	switch (cmd) {
		case HIDIOCGRDESCSIZE:
			if (put_user(dev->hid->rsize, (int __user *)arg))
				ret = -EFAULT;
			break;

		case HIDIOCGRDESC:
			{
				__u32 len;

				if (get_user(len, (int __user *)arg))
					ret = -EFAULT;
				else if (len > HID_MAX_DESCRIPTOR_SIZE - 1)
					ret = -EINVAL;
				else if (copy_to_user(user_arg + offsetof(
					struct hidraw_report_descriptor,
					value[0]),
					dev->hid->rdesc,
					min(dev->hid->rsize, len)))
					ret = -EFAULT;
				break;
			}
		case HIDIOCGRAWINFO:
			{
				struct hidraw_devinfo dinfo;

				dinfo.bustype = dev->hid->bus;
				dinfo.vendor = dev->hid->vendor;
				dinfo.product = dev->hid->product;
				if (copy_to_user(user_arg, &dinfo, sizeof(dinfo)))
					ret = -EFAULT;
				break;
			}
		default:
			ret = -ENOTTY;
	}
	return ret;
}

static const struct file_operations hidraw_ops = {
	.owner =        THIS_MODULE,
	.read =         hidraw_read,
	.write =        hidraw_write,
	.poll =         hidraw_poll,
	.open =         hidraw_open,
	.release =      hidraw_release,
	.unlocked_ioctl = hidraw_ioctl,
};

void hidraw_report_event(struct hid_device *hid, u8 *data, int len)
{
	struct hidraw *dev = hid->hidraw;
	struct hidraw_list *list;

	list_for_each_entry(list, &dev->list, node) {
		list->buffer[list->head].value = kmemdup(data, len, GFP_ATOMIC);
		list->buffer[list->head].len = len;
		list->head = (list->head + 1) & (HIDRAW_BUFFER_SIZE - 1);
		kill_fasync(&list->fasync, SIGIO, POLL_IN);
	}

	wake_up_interruptible(&dev->wait);
}
EXPORT_SYMBOL_GPL(hidraw_report_event);

int hidraw_connect(struct hid_device *hid)
{
	int minor, result;
	struct hidraw *dev;

	/* TODO currently we accept any HID device. This should later
	 * probably be fixed to accept only those devices which provide
	 * non-input applications
	 */

	dev = kzalloc(sizeof(struct hidraw), GFP_KERNEL);
	if (!dev)
		return -ENOMEM;

	result = -EINVAL;

	spin_lock(&minors_lock);

	for (minor = 0; minor < HIDRAW_MAX_DEVICES; minor++) {
		if (hidraw_table[minor])
			continue;
		hidraw_table[minor] = dev;
		result = 0;
		break;
	}

	spin_unlock(&minors_lock);

	if (result) {
		kfree(dev);
		goto out;
	}

	dev->dev = device_create(hidraw_class, NULL, MKDEV(hidraw_major, minor),
				 NULL, "%s%d", "hidraw", minor);

	if (IS_ERR(dev->dev)) {
		spin_lock(&minors_lock);
		hidraw_table[minor] = NULL;
		spin_unlock(&minors_lock);
		result = PTR_ERR(dev->dev);
		kfree(dev);
		goto out;
	}

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

	dev->hid = hid;
	dev->minor = minor;

	dev->exist = 1;
	hid->hidraw = dev;

out:
	return result;

}
EXPORT_SYMBOL_GPL(hidraw_connect);

void hidraw_disconnect(struct hid_device *hid)
{
	struct hidraw *hidraw = hid->hidraw;

	hidraw->exist = 0;

	spin_lock(&minors_lock);
	hidraw_table[hidraw->minor] = NULL;
	spin_unlock(&minors_lock);

	device_destroy(hidraw_class, MKDEV(hidraw_major, hidraw->minor));

	if (hidraw->open) {
		hid->ll_driver->close(hid);
		wake_up_interruptible(&hidraw->wait);
	} else {
		kfree(hidraw);
	}
}
EXPORT_SYMBOL_GPL(hidraw_disconnect);

int __init hidraw_init(void)
{
	int result;
	dev_t dev_id;

	result = alloc_chrdev_region(&dev_id, HIDRAW_FIRST_MINOR,
			HIDRAW_MAX_DEVICES, "hidraw");

	hidraw_major = MAJOR(dev_id);

	if (result < 0) {
		printk(KERN_WARNING "hidraw: can't get major number\n");
		result = 0;
		goto out;
	}

	hidraw_class = class_create(THIS_MODULE, "hidraw");
	if (IS_ERR(hidraw_class)) {
		result = PTR_ERR(hidraw_class);
		unregister_chrdev(hidraw_major, "hidraw");
		goto out;
	}

        cdev_init(&hidraw_cdev, &hidraw_ops);
        cdev_add(&hidraw_cdev, dev_id, HIDRAW_MAX_DEVICES);
out:
	return result;
}

void __exit hidraw_exit(void)
{
	dev_t dev_id = MKDEV(hidraw_major, 0);

	cdev_del(&hidraw_cdev);
	class_destroy(hidraw_class);
	unregister_chrdev_region(dev_id, HIDRAW_MAX_DEVICES);

}
Commit	Line	Data
86166b7b JK	1	/*
	2	* HID raw devices, giving access to raw HID events.
	3	*
	4	* In comparison to hiddev, this device does not process the
	5	* hid events at all (no parsing, no lookups). This lets applications
	6	* to work on raw hid events as they want to, and avoids a need to
	7	* use a transport-specific userspace libhid/libusb libraries.
	8	*
	9	* Copyright (c) 2007 Jiri Kosina
	10	*/
	11
	12	/*
	13	* This program is free software; you can redistribute it and/or modify it
	14	* under the terms and conditions of the GNU General Public License,
	15	* version 2, as published by the Free Software Foundation.
	16	*
	17	* You should have received a copy of the GNU General Public License along with
	18	* this program; if not, write to the Free Software Foundation, Inc.,
	19	* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
	20	*/
	21
	22	#include <linux/fs.h>
	23	#include <linux/module.h>
	24	#include <linux/errno.h>
	25	#include <linux/kernel.h>
	26	#include <linux/init.h>
	27	#include <linux/cdev.h>
	28	#include <linux/poll.h>
	29	#include <linux/device.h>
	30	#include <linux/major.h>
	31	#include <linux/hid.h>
	32	#include <linux/mutex.h>
702e57d9	33	#include <linux/smp_lock.h>
86166b7b JK	34
	35	#include <linux/hidraw.h>
	36
	37	static int hidraw_major;
	38	static struct cdev hidraw_cdev;
	39	static struct class *hidraw_class;
	40	static struct hidraw *hidraw_table[HIDRAW_MAX_DEVICES];
	41	static DEFINE_SPINLOCK(minors_lock);
	42
	43	static ssize_t hidraw_read(struct file file, char __user buffer, size_t count, loff_t *ppos)
	44	{
	45	struct hidraw_list *list = file->private_data;
	46	int ret = 0, len;
	47	char *report;
	48	DECLARE_WAITQUEUE(wait, current);
	49
	50	while (ret == 0) {
	51
	52	mutex_lock(&list->read_mutex);
	53
	54	if (list->head == list->tail) {
	55	add_wait_queue(&list->hidraw->wait, &wait);
	56	set_current_state(TASK_INTERRUPTIBLE);
	57
	58	while (list->head == list->tail) {
	59	if (file->f_flags & O_NONBLOCK) {
	60	ret = -EAGAIN;
	61	break;
	62	}
	63	if (signal_pending(current)) {
	64	ret = -ERESTARTSYS;
	65	break;
	66	}
	67	if (!list->hidraw->exist) {
	68	ret = -EIO;
	69	break;
	70	}
	71
	72	/* allow O_NONBLOCK to work well from other threads */
	73	mutex_unlock(&list->read_mutex);
	74	schedule();
	75	mutex_lock(&list->read_mutex);
	76	set_current_state(TASK_INTERRUPTIBLE);
	77	}
	78
	79	set_current_state(TASK_RUNNING);
	80	remove_wait_queue(&list->hidraw->wait, &wait);
	81	}
	82
	83	if (ret)
	84	goto out;
	85
	86	report = list->buffer[list->tail].value;
	87	len = list->buffer[list->tail].len > count ?
	88	count : list->buffer[list->tail].len;
	89
	90	if (copy_to_user(buffer, list->buffer[list->tail].value, len)) {
	91	ret = -EFAULT;
	92	goto out;
	93	}
	94	ret += len;
	95
	96	kfree(list->buffer[list->tail].value);
	97	list->tail = (list->tail + 1) & (HIDRAW_BUFFER_SIZE - 1);
98	}
99	out:
100	mutex_unlock(&list->read_mutex);
101	return ret;
102	}
103
104	/* the first byte is expected to be a report number */
105	static ssize_t hidraw_write(struct file file, const char __user buffer, size_t count, loff_t *ppos)
106	{
107	unsigned int minor = iminor(file->f_path.dentry->d_inode);
979c407e	108	/* FIXME: What stops hidraw_table going NULL */
86166b7b JK	109	struct hid_device *dev = hidraw_table[minor]->hid;
	110	__u8 *buf;
	111	int ret = 0;
	112
	113	if (!dev->hid_output_raw_report)
	114	return -ENODEV;
	115
2b107d62	116	if (count > HID_MAX_BUFFER_SIZE) {
86166b7b	117	printk(KERN_WARNING "hidraw: pid %d passed too large report\n",
ba25f9dc	118	task_pid_nr(current));
86166b7b JK	119	return -EINVAL;
	120	}
	121
	122	if (count < 2) {
	123	printk(KERN_WARNING "hidraw: pid %d passed too short report\n",
ba25f9dc	124	task_pid_nr(current));
86166b7b JK	125	return -EINVAL;
	126	}
	127
	128	buf = kmalloc(count * sizeof(__u8), GFP_KERNEL);
	129	if (!buf)
	130	return -ENOMEM;
	131
	132	if (copy_from_user(buf, buffer, count)) {
	133	ret = -EFAULT;
	134	goto out;
	135	}
	136
	137	ret = dev->hid_output_raw_report(dev, buf, count);
	138	out:
	139	kfree(buf);
	140	return ret;
	141	}
	142
	143	static unsigned int hidraw_poll(struct file file, poll_table wait)
	144	{
	145	struct hidraw_list *list = file->private_data;
	146
	147	poll_wait(file, &list->hidraw->wait, wait);
	148	if (list->head != list->tail)
	149	return POLLIN \| POLLRDNORM;
	150	if (!list->hidraw->exist)
	151	return POLLERR \| POLLHUP;
	152	return 0;
	153	}
	154
	155	static int hidraw_open(struct inode inode, struct file file)
	156	{
	157	unsigned int minor = iminor(inode);
	158	struct hidraw *dev;
	159	struct hidraw_list *list;
	160	int err = 0;
	161
702e57d9	162	lock_kernel();
86166b7b JK	163	if (!(list = kzalloc(sizeof(struct hidraw_list), GFP_KERNEL))) {
	164	err = -ENOMEM;
	165	goto out;
	166	}
	167
	168	spin_lock(&minors_lock);
	169	if (!hidraw_table[minor]) {
	170	printk(KERN_EMERG "hidraw device with minor %d doesn't exist\n",
	171	minor);
	172	kfree(list);
	173	err = -ENODEV;
	174	goto out_unlock;
	175	}
	176
	177	list->hidraw = hidraw_table[minor];
	178	mutex_init(&list->read_mutex);
	179	list_add_tail(&list->node, &hidraw_table[minor]->list);
	180	file->private_data = list;
	181
	182	dev = hidraw_table[minor];
	183	if (!dev->open++)
c500c971	184	dev->hid->ll_driver->open(dev->hid);
86166b7b JK	185
	186	out_unlock:
	187	spin_unlock(&minors_lock);
	188	out:
702e57d9	189	unlock_kernel();
86166b7b JK	190	return err;
	191
	192	}
	193
	194	static int hidraw_release(struct inode * inode, struct file * file)
	195	{
	196	unsigned int minor = iminor(inode);
	197	struct hidraw *dev;
	198	struct hidraw_list *list = file->private_data;
	199
	200	if (!hidraw_table[minor]) {
	201	printk(KERN_EMERG "hidraw device with minor %d doesn't exist\n",
	202	minor);
	203	return -ENODEV;
	204	}
	205
	206	list_del(&list->node);
	207	dev = hidraw_table[minor];
	208	if (!dev->open--) {
	209	if (list->hidraw->exist)
c500c971	210	dev->hid->ll_driver->close(dev->hid);
86166b7b JK	211	else
	212	kfree(list->hidraw);
	213	}
	214
4db1c62c JK	215	kfree(list);
4db1c62c JK	216
86166b7b JK	217	return 0;
	218	}
	219
979c407e AC	220	static long hidraw_ioctl(struct file *file, unsigned int cmd,
979c407e AC	221	unsigned long arg)
86166b7b	222	{
979c407e	223	struct inode *inode = file->f_path.dentry->d_inode;
86166b7b	224	unsigned int minor = iminor(inode);
979c407e AC	225	long ret = 0;
979c407e AC	226	/* FIXME: What stops hidraw_table going NULL */
86166b7b JK	227	struct hidraw *dev = hidraw_table[minor];
	228	void __user user_arg = (void __user) arg;
	229
979c407e	230	lock_kernel();
86166b7b JK	231	switch (cmd) {
	232	case HIDIOCGRDESCSIZE:
	233	if (put_user(dev->hid->rsize, (int __user *)arg))
979c407e AC	234	ret = -EFAULT;
979c407e AC	235	break;
86166b7b JK	236
	237	case HIDIOCGRDESC:
	238	{
	239	__u32 len;
	240
	241	if (get_user(len, (int __user *)arg))
979c407e AC	242	ret = -EFAULT;
	243	else if (len > HID_MAX_DESCRIPTOR_SIZE - 1)
	244	ret = -EINVAL;
	245	else if (copy_to_user(user_arg + offsetof(
	246	struct hidraw_report_descriptor,
	247	value[0]),
	248	dev->hid->rdesc,
	249	min(dev->hid->rsize, len)))
	250	ret = -EFAULT;
	251	break;
86166b7b JK	252	}
	253	case HIDIOCGRAWINFO:
	254	{
	255	struct hidraw_devinfo dinfo;
	256
	257	dinfo.bustype = dev->hid->bus;
	258	dinfo.vendor = dev->hid->vendor;
	259	dinfo.product = dev->hid->product;
	260	if (copy_to_user(user_arg, &dinfo, sizeof(dinfo)))
979c407e AC	261	ret = -EFAULT;
979c407e AC	262	break;
86166b7b JK	263	}
86166b7b JK	264	default:
979c407e	265	ret = -ENOTTY;
86166b7b	266	}
979c407e	267	return ret;
86166b7b JK	268	}
	269
	270	static const struct file_operations hidraw_ops = {
	271	.owner = THIS_MODULE,
	272	.read = hidraw_read,
	273	.write = hidraw_write,
	274	.poll = hidraw_poll,
	275	.open = hidraw_open,
	276	.release = hidraw_release,
979c407e	277	.unlocked_ioctl = hidraw_ioctl,
86166b7b JK	278	};
	279
	280	void hidraw_report_event(struct hid_device hid, u8 data, int len)
	281	{
	282	struct hidraw *dev = hid->hidraw;
	283	struct hidraw_list *list;
	284
	285	list_for_each_entry(list, &dev->list, node) {
	286	list->buffer[list->head].value = kmemdup(data, len, GFP_ATOMIC);
	287	list->buffer[list->head].len = len;
	288	list->head = (list->head + 1) & (HIDRAW_BUFFER_SIZE - 1);
	289	kill_fasync(&list->fasync, SIGIO, POLL_IN);
	290	}
	291
	292	wake_up_interruptible(&dev->wait);
	293	}
	294	EXPORT_SYMBOL_GPL(hidraw_report_event);
	295
	296	int hidraw_connect(struct hid_device *hid)
	297	{
709d27c0	298	int minor, result;
86166b7b JK	299	struct hidraw *dev;
	300
	301	/* TODO currently we accept any HID device. This should later
	302	* probably be fixed to accept only those devices which provide
	303	* non-input applications
	304	*/
	305
709d27c0 MK	306	dev = kzalloc(sizeof(struct hidraw), GFP_KERNEL);
	307	if (!dev)
	308	return -ENOMEM;
	309
	310	result = -EINVAL;
86166b7b JK	311
	312	spin_lock(&minors_lock);
	313
	314	for (minor = 0; minor < HIDRAW_MAX_DEVICES; minor++) {
	315	if (hidraw_table[minor])
	316	continue;
	317	hidraw_table[minor] = dev;
	318	result = 0;
	319	break;
	320	}
	321
	322	spin_unlock(&minors_lock);
	323
709d27c0 MK	324	if (result) {
709d27c0 MK	325	kfree(dev);
86166b7b	326	goto out;
709d27c0	327	}
86166b7b	328
a9b12619 GKH	329	dev->dev = device_create(hidraw_class, NULL, MKDEV(hidraw_major, minor),
a9b12619 GKH	330	NULL, "%s%d", "hidraw", minor);
86166b7b JK	331
	332	if (IS_ERR(dev->dev)) {
	333	spin_lock(&minors_lock);
	334	hidraw_table[minor] = NULL;
	335	spin_unlock(&minors_lock);
	336	result = PTR_ERR(dev->dev);
709d27c0	337	kfree(dev);
86166b7b JK	338	goto out;
	339	}
	340
	341	init_waitqueue_head(&dev->wait);
	342	INIT_LIST_HEAD(&dev->list);
	343
	344	dev->hid = hid;
	345	dev->minor = minor;
	346
	347	dev->exist = 1;
	348	hid->hidraw = dev;
	349
	350	out:
	351	return result;
	352
	353	}
	354	EXPORT_SYMBOL_GPL(hidraw_connect);
	355
	356	void hidraw_disconnect(struct hid_device *hid)
	357	{
	358	struct hidraw *hidraw = hid->hidraw;
	359
	360	hidraw->exist = 0;
	361
	362	spin_lock(&minors_lock);
	363	hidraw_table[hidraw->minor] = NULL;
	364	spin_unlock(&minors_lock);
	365
	366	device_destroy(hidraw_class, MKDEV(hidraw_major, hidraw->minor));
	367
	368	if (hidraw->open) {
c500c971	369	hid->ll_driver->close(hid);
86166b7b JK	370	wake_up_interruptible(&hidraw->wait);
	371	} else {
	372	kfree(hidraw);
	373	}
	374	}
	375	EXPORT_SYMBOL_GPL(hidraw_disconnect);
	376
	377	int __init hidraw_init(void)
	378	{
	379	int result;
	380	dev_t dev_id;
	381
	382	result = alloc_chrdev_region(&dev_id, HIDRAW_FIRST_MINOR,
	383	HIDRAW_MAX_DEVICES, "hidraw");
	384
	385	hidraw_major = MAJOR(dev_id);
	386
	387	if (result < 0) {
	388	printk(KERN_WARNING "hidraw: can't get major number\n");
	389	result = 0;
	390	goto out;
	391	}
	392
	393	hidraw_class = class_create(THIS_MODULE, "hidraw");
	394	if (IS_ERR(hidraw_class)) {
	395	result = PTR_ERR(hidraw_class);
	396	unregister_chrdev(hidraw_major, "hidraw");
	397	goto out;
	398	}
	399
	400	cdev_init(&hidraw_cdev, &hidraw_ops);
	401	cdev_add(&hidraw_cdev, dev_id, HIDRAW_MAX_DEVICES);
	402	out:
	403	return result;
	404	}
	405
	406	void __exit hidraw_exit(void)
	407	{
	408	dev_t dev_id = MKDEV(hidraw_major, 0);
	409
	410	cdev_del(&hidraw_cdev);
	411	class_destroy(hidraw_class);
	412	unregister_chrdev_region(dev_id, HIDRAW_MAX_DEVICES);
	413
	414	}