/*
* Virtual Video driver - This code emulates a real video device with v4l2 api
*
* Copyright (c) 2006 by:
* Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
* Ted Walther <ted--a.t--enumera.com>
* John Sokol <sokol--a.t--videotechnology.com>
* http://v4l.videotechnology.com/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the BSD Licence, GNU General Public License
* as published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/random.h>
#include <linux/version.h>
#include <linux/videodev2.h>
#include <linux/dma-mapping.h>
#ifdef CONFIG_VIDEO_V4L1_COMPAT
/* Include V4L1 specific functions. Should be removed soon */
#include <linux/videodev.h>
#endif
#include <linux/interrupt.h>
#include <media/video-buf.h>
#include <media/v4l2-common.h>
#include <linux/kthread.h>
#include <linux/highmem.h>
#include <linux/freezer.h>
/* Wake up at about 30 fps */
#define WAKE_NUMERATOR 30
#define WAKE_DENOMINATOR 1001
#define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
/* These timers are for 1 fps - used only for testing */
//#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
//#define BUFFER_TIMEOUT msecs_to_jiffies(5000) /* 5 seconds */
#include "font.h"
#define VIVI_MAJOR_VERSION 0
#define VIVI_MINOR_VERSION 4
#define VIVI_RELEASE 0
#define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
/* Declare static vars that will be used as parameters */
static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
static struct video_device vivi; /* Video device */
static int video_nr = -1; /* /dev/videoN, -1 for autodetect */
/* supported controls */
static struct v4l2_queryctrl vivi_qctrl[] = {
{
.id = V4L2_CID_AUDIO_VOLUME,
.name = "Volume",
.minimum = 0,
.maximum = 65535,
.step = 65535/100,
.default_value = 65535,
.flags = 0,
.type = V4L2_CTRL_TYPE_INTEGER,
},{
.id = V4L2_CID_BRIGHTNESS,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Brightness",
.minimum 