drivers/media/video/v4l2-subdev.c

/*
 *  V4L2 subdevice support.
 *
 *  Copyright (C) 2010 Nokia Corporation
 *
 *  Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/types.h>
#include <linux/ioctl.h>
#include <linux/videodev2.h>

#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>

static int subdev_open(struct file *file)
{
	return 0;
}

static int subdev_close(struct file *file)
{
	return 0;
}

static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
{
	switch (cmd) {
	default:
		return -ENOIOCTLCMD;
	}

	return 0;
}

static long subdev_ioctl(struct file *file, unsigned int cmd,
	unsigned long arg)
{
	return video_usercopy(file, cmd, arg, subdev_do_ioctl);
}

const struct v4l2_file_operations v4l2_subdev_fops = {
	.owner = THIS_MODULE,
	.open = subdev_open,
	.unlocked_ioctl = subdev_ioctl,
	.release = subdev_close,
};