1394 lines
33 KiB
C
1394 lines
33 KiB
C
/*
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* Virtual Video driver - This code emulates a real video device with v4l2 api
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*
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* Copyright (c) 2006 by:
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* Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
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* Ted Walther <ted--a.t--enumera.com>
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* John Sokol <sokol--a.t--videotechnology.com>
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* http://v4l.videotechnology.com/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the BSD Licence, GNU General Public License
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* as published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/pci.h>
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#include <linux/random.h>
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#include <linux/version.h>
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#include <linux/videodev2.h>
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#include <linux/dma-mapping.h>
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#ifdef CONFIG_VIDEO_V4L1_COMPAT
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/* Include V4L1 specific functions. Should be removed soon */
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#include <linux/videodev.h>
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#endif
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#include <linux/interrupt.h>
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#include <media/video-buf.h>
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#include <media/v4l2-common.h>
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#include <linux/kthread.h>
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#include <linux/highmem.h>
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/* Wake up at about 30 fps */
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#define WAKE_NUMERATOR 30
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#define WAKE_DENOMINATOR 1001
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#define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
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/* These timers are for 1 fps - used only for testing */
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//#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
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//#define BUFFER_TIMEOUT msecs_to_jiffies(5000) /* 5 seconds */
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#include "font.h"
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#define VIVI_MAJOR_VERSION 0
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#define VIVI_MINOR_VERSION 4
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#define VIVI_RELEASE 0
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#define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
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/* Declare static vars that will be used as parameters */
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static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
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static struct video_device vivi; /* Video device */
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static int video_nr = -1; /* /dev/videoN, -1 for autodetect */
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/* supported controls */
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static struct v4l2_queryctrl vivi_qctrl[] = {
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{
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.id = V4L2_CID_AUDIO_VOLUME,
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.name = "Volume",
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.minimum = 0,
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.maximum = 65535,
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.step = 65535/100,
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.default_value = 65535,
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.flags = 0,
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.type = V4L2_CTRL_TYPE_INTEGER,
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},{
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.id = V4L2_CID_BRIGHTNESS,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Brightness",
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.minimum = 0,
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.maximum = 255,
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.step = 1,
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.default_value = 127,
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.flags = 0,
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}, {
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.id = V4L2_CID_CONTRAST,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Contrast",
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.minimum = 0,
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.maximum = 255,
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.step = 0x1,
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.default_value = 0x10,
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.flags = 0,
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}, {
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.id = V4L2_CID_SATURATION,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Saturation",
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.minimum = 0,
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.maximum = 255,
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.step = 0x1,
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.default_value = 127,
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.flags = 0,
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}, {
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.id = V4L2_CID_HUE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Hue",
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.minimum = -128,
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.maximum = 127,
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.step = 0x1,
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.default_value = 0,
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.flags = 0,
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}
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};
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static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
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#define dprintk(level,fmt, arg...) \
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do { \
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if (vivi.debug >= (level)) \
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printk(KERN_DEBUG "vivi: " fmt , ## arg); \
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} while (0)
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/* ------------------------------------------------------------------
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Basic structures
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------------------------------------------------------------------*/
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struct vivi_fmt {
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char *name;
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u32 fourcc; /* v4l2 format id */
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int depth;
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};
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static struct vivi_fmt format = {
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.name = "4:2:2, packed, YUYV",
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.fourcc = V4L2_PIX_FMT_YUYV,
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.depth = 16,
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};
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struct sg_to_addr {
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int pos;
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struct scatterlist *sg;
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};
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/* buffer for one video frame */
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struct vivi_buffer {
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/* common v4l buffer stuff -- must be first */
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struct videobuf_buffer vb;
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struct vivi_fmt *fmt;
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struct sg_to_addr *to_addr;
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};
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struct vivi_dmaqueue {
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struct list_head active;
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struct list_head queued;
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struct timer_list timeout;
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/* thread for generating video stream*/
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struct task_struct *kthread;
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wait_queue_head_t wq;
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/* Counters to control fps rate */
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int frame;
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int ini_jiffies;
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};
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static LIST_HEAD(vivi_devlist);
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struct vivi_dev {
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struct list_head vivi_devlist;
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struct semaphore lock;
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int users;
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/* various device info */
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unsigned int resources;
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struct video_device vfd;
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struct vivi_dmaqueue vidq;
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/* Several counters */
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int h,m,s,us,jiffies;
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char timestr[13];
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};
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struct vivi_fh {
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struct vivi_dev *dev;
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/* video capture */
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struct vivi_fmt *fmt;
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unsigned int width,height;
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struct videobuf_queue vb_vidq;
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enum v4l2_buf_type type;
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};
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/* ------------------------------------------------------------------
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DMA and thread functions
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------------------------------------------------------------------*/
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/* Bars and Colors should match positions */
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enum colors {
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WHITE,
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AMBAR,
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CYAN,
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GREEN,
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MAGENTA,
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RED,
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BLUE
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};
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static u8 bars[8][3] = {
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/* R G B */
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{204,204,204}, /* white */
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{208,208, 0}, /* ambar */
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{ 0,206,206}, /* cyan */
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{ 0,239, 0}, /* green */
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{239, 0,239}, /* magenta */
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{205, 0, 0}, /* red */
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{ 0, 0,255}, /* blue */
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{ 0, 0, 0}
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};
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#define TO_Y(r,g,b) (((16829*r +33039*g +6416*b + 32768)>>16)+16)
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/* RGB to V(Cr) Color transform */
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#define TO_V(r,g,b) (((28784*r -24103*g -4681*b + 32768)>>16)+128)
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/* RGB to U(Cb) Color transform */
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#define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128)
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#define TSTAMP_MIN_Y 24
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#define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
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#define TSTAMP_MIN_X 64
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static void prep_to_addr(struct sg_to_addr to_addr[],
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struct videobuf_buffer *vb)
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{
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int i, pos=0;
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for (i=0;i<vb->dma.nr_pages;i++) {
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to_addr[i].sg=&vb->dma.sglist[i];
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to_addr[i].pos=pos;
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pos += vb->dma.sglist[i].length;
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}
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}
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static int get_addr_pos(int pos, int pages, struct sg_to_addr to_addr[])
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{
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int p1=0,p2=pages-1,p3=pages/2;
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/* Sanity test */
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BUG_ON (pos>=to_addr[p2].pos+to_addr[p2].sg->length);
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while (p1+1<p2) {
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if (pos < to_addr[p3].pos) {
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p2=p3;
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} else {
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p1=p3;
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}
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p3=(p1+p2)/2;
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}
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if (pos >= to_addr[p2].pos)
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p1=p2;
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return (p1);
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}
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static void gen_line(struct sg_to_addr to_addr[],int inipos,int pages,int wmax,
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int hmax, int line, char *timestr)
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{
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int w,i,j,pos=inipos,pgpos,oldpg,y;
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char *p,*s,*basep;
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struct page *pg;
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u8 chr,r,g,b,color;
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/* Get first addr pointed to pixel position */
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oldpg=get_addr_pos(pos,pages,to_addr);
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pg=pfn_to_page(to_addr[oldpg].sg->dma_address >> PAGE_SHIFT);
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basep = kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[oldpg].sg->offset;
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/* We will just duplicate the second pixel at the packet */
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wmax/=2;
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/* Generate a standard color bar pattern */
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for (w=0;w<wmax;w++) {
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r=bars[w*7/wmax][0];
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g=bars[w*7/wmax][1];
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b=bars[w*7/wmax][2];
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for (color=0;color<4;color++) {
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pgpos=get_addr_pos(pos,pages,to_addr);
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if (pgpos!=oldpg) {
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pg=pfn_to_page(to_addr[pgpos].sg->dma_address >> PAGE_SHIFT);
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kunmap_atomic(basep, KM_BOUNCE_READ);
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basep= kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[pgpos].sg->offset;
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oldpg=pgpos;
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}
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p=basep+pos-to_addr[pgpos].pos;
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switch (color) {
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case 0:
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case 2:
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*p=TO_Y(r,g,b); /* Luminance */
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break;
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case 1:
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*p=TO_U(r,g,b); /* Cb */
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break;
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case 3:
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*p=TO_V(r,g,b); /* Cr */
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break;
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}
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pos++;
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}
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}
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/* Checks if it is possible to show timestamp */
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if (TSTAMP_MAX_Y>=hmax)
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goto end;
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if (TSTAMP_MIN_X+strlen(timestr)>=wmax)
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goto end;
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/* Print stream time */
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if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) {
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j=TSTAMP_MIN_X;
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for (s=timestr;*s;s++) {
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chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
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for (i=0;i<7;i++) {
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if (chr&1<<(7-i)) { /* Font color*/
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r=bars[BLUE][0];
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g=bars[BLUE][1];
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b=bars[BLUE][2];
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r=g=b=0;
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g=198;
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} else { /* Background color */
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r=bars[WHITE][0];
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g=bars[WHITE][1];
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b=bars[WHITE][2];
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r=g=b=0;
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}
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pos=inipos+j*2;
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for (color=0;color<4;color++) {
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pgpos=get_addr_pos(pos,pages,to_addr);
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if (pgpos!=oldpg) {
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pg=pfn_to_page(to_addr[pgpos].
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sg->dma_address
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>> PAGE_SHIFT);
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kunmap_atomic(basep,
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KM_BOUNCE_READ);
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basep= kmap_atomic(pg,
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KM_BOUNCE_READ)+
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to_addr[pgpos].sg->offset;
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oldpg=pgpos;
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}
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p=basep+pos-to_addr[pgpos].pos;
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y=TO_Y(r,g,b);
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switch (color) {
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case 0:
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case 2:
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*p=TO_Y(r,g,b); /* Luminance */
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break;
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case 1:
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*p=TO_U(r,g,b); /* Cb */
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break;
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case 3:
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*p=TO_V(r,g,b); /* Cr */
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break;
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}
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pos++;
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}
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j++;
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}
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}
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}
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end:
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kunmap_atomic(basep, KM_BOUNCE_READ);
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}
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static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf)
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{
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int h,pos=0;
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int hmax = buf->vb.height;
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int wmax = buf->vb.width;
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struct videobuf_buffer *vb=&buf->vb;
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struct sg_to_addr *to_addr=buf->to_addr;
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struct timeval ts;
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/* Test if DMA mapping is ready */
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if (!vb->dma.sglist[0].dma_address)
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return;
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prep_to_addr(to_addr,vb);
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/* Check if there is enough memory */
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BUG_ON(buf->vb.dma.nr_pages << PAGE_SHIFT < (buf->vb.width*buf->vb.height)*2);
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for (h=0;h<hmax;h++) {
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gen_line(to_addr,pos,vb->dma.nr_pages,wmax,hmax,h,dev->timestr);
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pos += wmax*2;
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}
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/* Updates stream time */
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dev->us+=jiffies_to_usecs(jiffies-dev->jiffies);
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dev->jiffies=jiffies;
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if (dev->us>=1000000) {
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dev->us-=1000000;
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dev->s++;
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if (dev->s>=60) {
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dev->s-=60;
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dev->m++;
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if (dev->m>60) {
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dev->m-=60;
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dev->h++;
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if (dev->h>24)
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dev->h-=24;
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}
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}
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}
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sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
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dev->h,dev->m,dev->s,(dev->us+500)/1000);
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dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr,
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(unsigned long)buf->vb.dma.vmalloc,pos);
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/* Advice that buffer was filled */
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buf->vb.state = STATE_DONE;
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buf->vb.field_count++;
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do_gettimeofday(&ts);
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buf->vb.ts = ts;
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list_del(&buf->vb.queue);
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wake_up(&buf->vb.done);
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}
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static int restart_video_queue(struct vivi_dmaqueue *dma_q);
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static void vivi_thread_tick(struct vivi_dmaqueue *dma_q)
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{
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struct vivi_buffer *buf;
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struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq);
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int bc;
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/* Announces videobuf that all went ok */
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for (bc = 0;; bc++) {
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if (list_empty(&dma_q->active)) {
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dprintk(1,"No active queue to serve\n");
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break;
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}
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buf = list_entry(dma_q->active.next,
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struct vivi_buffer, vb.queue);
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/* Nobody is waiting something to be done, just return */
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if (!waitqueue_active(&buf->vb.done)) {
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mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
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return;
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}
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do_gettimeofday(&buf->vb.ts);
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dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i);
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/* Fill buffer */
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vivi_fillbuff(dev,buf);
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}
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if (list_empty(&dma_q->active)) {
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del_timer(&dma_q->timeout);
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} else {
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mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
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}
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if (bc != 1)
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dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
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}
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static void vivi_sleep(struct vivi_dmaqueue *dma_q)
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{
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int timeout;
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DECLARE_WAITQUEUE(wait, current);
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dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
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add_wait_queue(&dma_q->wq, &wait);
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if (!kthread_should_stop()) {
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dma_q->frame++;
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/* Calculate time to wake up */
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timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
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if (timeout <= 0) {
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int old=dma_q->frame;
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dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
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timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
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dprintk(1,"underrun, losed %d frames. "
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"Now, frame is %d. Waking on %d jiffies\n",
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dma_q->frame-old,dma_q->frame,timeout);
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} else
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dprintk(1,"will sleep for %i jiffies\n",timeout);
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vivi_thread_tick(dma_q);
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schedule_timeout_interruptible (timeout);
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}
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remove_wait_queue(&dma_q->wq, &wait);
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try_to_freeze();
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}
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static int vivi_thread(void *data)
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{
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struct vivi_dmaqueue *dma_q=data;
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|
dprintk(1,"thread started\n");
|
|
|
|
for (;;) {
|
|
vivi_sleep(dma_q);
|
|
|
|
if (kthread_should_stop())
|
|
break;
|
|
}
|
|
dprintk(1, "thread: exit\n");
|
|
return 0;
|
|
}
|
|
|
|
static int vivi_start_thread(struct vivi_dmaqueue *dma_q)
|
|
{
|
|
dma_q->frame=0;
|
|
dma_q->ini_jiffies=jiffies;
|
|
|
|
dprintk(1,"%s\n",__FUNCTION__);
|
|
init_waitqueue_head(&dma_q->wq);
|
|
|
|
dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
|
|
|
|
if (dma_q->kthread == NULL) {
|
|
printk(KERN_ERR "vivi: kernel_thread() failed\n");
|
|
return -EINVAL;
|
|
}
|
|
dprintk(1,"returning from %s\n",__FUNCTION__);
|
|
return 0;
|
|
}
|
|
|
|
static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
|
|
{
|
|
dprintk(1,"%s\n",__FUNCTION__);
|
|
/* shutdown control thread */
|
|
if (dma_q->kthread) {
|
|
kthread_stop(dma_q->kthread);
|
|
dma_q->kthread=NULL;
|
|
}
|
|
}
|
|
|
|
static int restart_video_queue(struct vivi_dmaqueue *dma_q)
|
|
{
|
|
struct vivi_buffer *buf, *prev;
|
|
struct list_head *item;
|
|
|
|
dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
|
|
|
|
if (!list_empty(&dma_q->active)) {
|
|
buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
|
|
dprintk(2,"restart_queue [%p/%d]: restart dma\n",
|
|
buf, buf->vb.i);
|
|
|
|
dprintk(1,"Restarting video dma\n");
|
|
vivi_stop_thread(dma_q);
|
|
// vivi_start_thread(dma_q);
|
|
|
|
/* cancel all outstanding capture / vbi requests */
|
|
list_for_each(item,&dma_q->active) {
|
|
buf = list_entry(item, struct vivi_buffer, vb.queue);
|
|
|
|
list_del(&buf->vb.queue);
|
|
buf->vb.state = STATE_ERROR;
|
|
wake_up(&buf->vb.done);
|
|
}
|
|
mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
|
|
|
|
return 0;
|
|
}
|
|
|
|
prev = NULL;
|
|
for (;;) {
|
|
if (list_empty(&dma_q->queued))
|
|
return 0;
|
|
buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
|
|
if (NULL == prev) {
|
|
list_del(&buf->vb.queue);
|
|
list_add_tail(&buf->vb.queue,&dma_q->active);
|
|
|
|
dprintk(1,"Restarting video dma\n");
|
|
vivi_stop_thread(dma_q);
|
|
vivi_start_thread(dma_q);
|
|
|
|
buf->vb.state = STATE_ACTIVE;
|
|
mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
|
|
dprintk(2,"[%p/%d] restart_queue - first active\n",
|
|
buf,buf->vb.i);
|
|
|
|
} else if (prev->vb.width == buf->vb.width &&
|
|
prev->vb.height == buf->vb.height &&
|
|
prev->fmt == buf->fmt) {
|
|
list_del(&buf->vb.queue);
|
|
list_add_tail(&buf->vb.queue,&dma_q->active);
|
|
buf->vb.state = STATE_ACTIVE;
|
|
dprintk(2,"[%p/%d] restart_queue - move to active\n",
|
|
buf,buf->vb.i);
|
|
} else {
|
|
return 0;
|
|
}
|
|
prev = buf;
|
|
}
|
|
}
|
|
|
|
static void vivi_vid_timeout(unsigned long data)
|
|
{
|
|
struct vivi_dev *dev = (struct vivi_dev*)data;
|
|
struct vivi_dmaqueue *vidq = &dev->vidq;
|
|
struct vivi_buffer *buf;
|
|
|
|
while (!list_empty(&vidq->active)) {
|
|
buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
|
|
list_del(&buf->vb.queue);
|
|
buf->vb.state = STATE_ERROR;
|
|
wake_up(&buf->vb.done);
|
|
printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
|
|
}
|
|
|
|
restart_video_queue(vidq);
|
|
}
|
|
|
|
/* ------------------------------------------------------------------
|
|
Videobuf operations
|
|
------------------------------------------------------------------*/
|
|
static int
|
|
buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
|
|
{
|
|
struct vivi_fh *fh = vq->priv_data;
|
|
|
|
*size = fh->width*fh->height*2;
|
|
|
|
if (0 == *count)
|
|
*count = 32;
|
|
while (*size * *count > vid_limit * 1024 * 1024)
|
|
(*count)--;
|
|
return 0;
|
|
}
|
|
|
|
static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
|
|
{
|
|
dprintk(1,"%s\n",__FUNCTION__);
|
|
|
|
if (in_interrupt())
|
|
BUG();
|
|
|
|
/*FIXME: Maybe a spinlock is required here */
|
|
kfree(buf->to_addr);
|
|
buf->to_addr=NULL;
|
|
|
|
videobuf_waiton(&buf->vb,0,0);
|
|
videobuf_dma_unmap(vq, &buf->vb.dma);
|
|
videobuf_dma_free(&buf->vb.dma);
|
|
buf->vb.state = STATE_NEEDS_INIT;
|
|
}
|
|
|
|
#define norm_maxw() 1024
|
|
#define norm_maxh() 768
|
|
static int
|
|
buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
|
|
enum v4l2_field field)
|
|
{
|
|
struct vivi_fh *fh = vq->priv_data;
|
|
struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
|
|
int rc, init_buffer = 0;
|
|
|
|
// dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
|
|
|
|
BUG_ON(NULL == fh->fmt);
|
|
if (fh->width < 48 || fh->width > norm_maxw() ||
|
|
fh->height < 32 || fh->height > norm_maxh())
|
|
return -EINVAL;
|
|
buf->vb.size = fh->width*fh->height*2;
|
|
if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
|
|
return -EINVAL;
|
|
|
|
if (buf->fmt != fh->fmt ||
|
|
buf->vb.width != fh->width ||
|
|
buf->vb.height != fh->height ||
|
|
buf->vb.field != field) {
|
|
buf->fmt = fh->fmt;
|
|
buf->vb.width = fh->width;
|
|
buf->vb.height = fh->height;
|
|
buf->vb.field = field;
|
|
init_buffer = 1;
|
|
}
|
|
|
|
if (STATE_NEEDS_INIT == buf->vb.state) {
|
|
if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
|
|
goto fail;
|
|
}
|
|
|
|
buf->vb.state = STATE_PREPARED;
|
|
|
|
if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) {
|
|
rc=-ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
free_buffer(vq,buf);
|
|
return rc;
|
|
}
|
|
|
|
static void
|
|
buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
|
|
{
|
|
struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
|
|
struct vivi_fh *fh = vq->priv_data;
|
|
struct vivi_dev *dev = fh->dev;
|
|
struct vivi_dmaqueue *vidq = &dev->vidq;
|
|
struct vivi_buffer *prev;
|
|
|
|
if (!list_empty(&vidq->queued)) {
|
|
dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
|
|
list_add_tail(&buf->vb.queue,&vidq->queued);
|
|
buf->vb.state = STATE_QUEUED;
|
|
dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
|
|
buf, buf->vb.i);
|
|
} else if (list_empty(&vidq->active)) {
|
|
list_add_tail(&buf->vb.queue,&vidq->active);
|
|
|
|
buf->vb.state = STATE_ACTIVE;
|
|
mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
|
|
dprintk(2,"[%p/%d] buffer_queue - first active\n",
|
|
buf, buf->vb.i);
|
|
|
|
vivi_start_thread(vidq);
|
|
} else {
|
|
prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
|
|
if (prev->vb.width == buf->vb.width &&
|
|
prev->vb.height == buf->vb.height &&
|
|
prev->fmt == buf->fmt) {
|
|
list_add_tail(&buf->vb.queue,&vidq->active);
|
|
buf->vb.state = STATE_ACTIVE;
|
|
dprintk(2,"[%p/%d] buffer_queue - append to active\n",
|
|
buf, buf->vb.i);
|
|
|
|
} else {
|
|
list_add_tail(&buf->vb.queue,&vidq->queued);
|
|
buf->vb.state = STATE_QUEUED;
|
|
dprintk(2,"[%p/%d] buffer_queue - first queued\n",
|
|
buf, buf->vb.i);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
|
|
{
|
|
struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
|
|
struct vivi_fh *fh = vq->priv_data;
|
|
struct vivi_dev *dev = (struct vivi_dev*)fh->dev;
|
|
struct vivi_dmaqueue *vidq = &dev->vidq;
|
|
|
|
dprintk(1,"%s\n",__FUNCTION__);
|
|
|
|
vivi_stop_thread(vidq);
|
|
|
|
free_buffer(vq,buf);
|
|
}
|
|
|
|
static int vivi_map_sg(void *dev, struct scatterlist *sg, int nents,
|
|
int direction)
|
|
{
|
|
int i;
|
|
|
|
dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents);
|
|
BUG_ON(direction == DMA_NONE);
|
|
|
|
for (i = 0; i < nents; i++ ) {
|
|
BUG_ON(!sg[i].page);
|
|
|
|
sg[i].dma_address = page_to_phys(sg[i].page) + sg[i].offset;
|
|
}
|
|
|
|
return nents;
|
|
}
|
|
|
|
static int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages,
|
|
int direction)
|
|
{
|
|
dprintk(1,"%s\n",__FUNCTION__);
|
|
return 0;
|
|
}
|
|
|
|
static int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist, int nr_pages,
|
|
int direction)
|
|
{
|
|
// dprintk(1,"%s\n",__FUNCTION__);
|
|
|
|
// flush_write_buffers();
|
|
return 0;
|
|
}
|
|
|
|
static struct videobuf_queue_ops vivi_video_qops = {
|
|
.buf_setup = buffer_setup,
|
|
.buf_prepare = buffer_prepare,
|
|
.buf_queue = buffer_queue,
|
|
.buf_release = buffer_release,
|
|
|
|
/* Non-pci handling routines */
|
|
.vb_map_sg = vivi_map_sg,
|
|
.vb_dma_sync_sg = vivi_dma_sync_sg,
|
|
.vb_unmap_sg = vivi_unmap_sg,
|
|
};
|
|
|
|
/* ------------------------------------------------------------------
|
|
IOCTL handling
|
|
------------------------------------------------------------------*/
|
|
|
|
|
|
static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
|
|
{
|
|
/* is it free? */
|
|
down(&dev->lock);
|
|
if (dev->resources) {
|
|
/* no, someone else uses it */
|
|
up(&dev->lock);
|
|
return 0;
|
|
}
|
|
/* it's free, grab it */
|
|
dev->resources =1;
|
|
dprintk(1,"res: get\n");
|
|
up(&dev->lock);
|
|
return 1;
|
|
}
|
|
|
|
static int res_locked(struct vivi_dev *dev)
|
|
{
|
|
return (dev->resources);
|
|
}
|
|
|
|
static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
|
|
{
|
|
down(&dev->lock);
|
|
dev->resources = 0;
|
|
dprintk(1,"res: put\n");
|
|
up(&dev->lock);
|
|
}
|
|
|
|
/* ------------------------------------------------------------------
|
|
IOCTL vidioc handling
|
|
------------------------------------------------------------------*/
|
|
static int vidioc_querycap (struct file *file, void *priv,
|
|
struct v4l2_capability *cap)
|
|
{
|
|
strcpy(cap->driver, "vivi");
|
|
strcpy(cap->card, "vivi");
|
|
cap->version = VIVI_VERSION;
|
|
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
|
|
V4L2_CAP_STREAMING |
|
|
V4L2_CAP_READWRITE;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_enum_fmt_cap (struct file *file, void *priv,
|
|
struct v4l2_fmtdesc *f)
|
|
{
|
|
if (f->index > 0)
|
|
return -EINVAL;
|
|
|
|
strlcpy(f->description,format.name,sizeof(f->description));
|
|
f->pixelformat = format.fourcc;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_g_fmt_cap (struct file *file, void *priv,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct vivi_fh *fh=priv;
|
|
|
|
f->fmt.pix.width = fh->width;
|
|
f->fmt.pix.height = fh->height;
|
|
f->fmt.pix.field = fh->vb_vidq.field;
|
|
f->fmt.pix.pixelformat = fh->fmt->fourcc;
|
|
f->fmt.pix.bytesperline =
|
|
(f->fmt.pix.width * fh->fmt->depth) >> 3;
|
|
f->fmt.pix.sizeimage =
|
|
f->fmt.pix.height * f->fmt.pix.bytesperline;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int vidioc_try_fmt_cap (struct file *file, void *priv,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct vivi_fmt *fmt;
|
|
enum v4l2_field field;
|
|
unsigned int maxw, maxh;
|
|
|
|
if (format.fourcc != f->fmt.pix.pixelformat) {
|
|
dprintk(1,"Fourcc format (0x%08x) invalid. Driver accepts "
|
|
"only 0x%08x\n",f->fmt.pix.pixelformat,format.fourcc);
|
|
return -EINVAL;
|
|
}
|
|
fmt=&format;
|
|
|
|
field = f->fmt.pix.field;
|
|
|
|
if (field == V4L2_FIELD_ANY) {
|
|
// field=V4L2_FIELD_INTERLACED;
|
|
field=V4L2_FIELD_SEQ_TB;
|
|
} else if (V4L2_FIELD_INTERLACED != field) {
|
|
dprintk(1,"Field type invalid.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
maxw = norm_maxw();
|
|
maxh = norm_maxh();
|
|
|
|
f->fmt.pix.field = field;
|
|
if (f->fmt.pix.height < 32)
|
|
f->fmt.pix.height = 32;
|
|
if (f->fmt.pix.height > maxh)
|
|
f->fmt.pix.height = maxh;
|
|
if (f->fmt.pix.width < 48)
|
|
f->fmt.pix.width = 48;
|
|
if (f->fmt.pix.width > maxw)
|
|
f->fmt.pix.width = maxw;
|
|
f->fmt.pix.width &= ~0x03;
|
|
f->fmt.pix.bytesperline =
|
|
(f->fmt.pix.width * fmt->depth) >> 3;
|
|
f->fmt.pix.sizeimage =
|
|
f->fmt.pix.height * f->fmt.pix.bytesperline;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*FIXME: This seems to be generic enough to be at videodev2 */
|
|
static int vidioc_s_fmt_cap (struct file *file, void *priv,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct vivi_fh *fh=priv;
|
|
int ret = vidioc_try_fmt_cap(file,fh,f);
|
|
if (ret < 0)
|
|
return (ret);
|
|
|
|
fh->fmt = &format;
|
|
fh->width = f->fmt.pix.width;
|
|
fh->height = f->fmt.pix.height;
|
|
fh->vb_vidq.field = f->fmt.pix.field;
|
|
fh->type = f->type;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int vidioc_reqbufs (struct file *file, void *priv, struct v4l2_requestbuffers *p)
|
|
{
|
|
struct vivi_fh *fh=priv;
|
|
|
|
return (videobuf_reqbufs(&fh->vb_vidq, p));
|
|
}
|
|
|
|
static int vidioc_querybuf (struct file *file, void *priv, struct v4l2_buffer *p)
|
|
{
|
|
struct vivi_fh *fh=priv;
|
|
|
|
return (videobuf_querybuf(&fh->vb_vidq, p));
|
|
}
|
|
|
|
static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *p)
|
|
{
|
|
struct vivi_fh *fh=priv;
|
|
|
|
return (videobuf_qbuf(&fh->vb_vidq, p));
|
|
}
|
|
|
|
static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *p)
|
|
{
|
|
struct vivi_fh *fh=priv;
|
|
|
|
return (videobuf_dqbuf(&fh->vb_vidq, p,
|
|
file->f_flags & O_NONBLOCK));
|
|
}
|
|
|
|
#ifdef HAVE_V4L1
|
|
static int vidiocgmbuf (struct file *file, void *priv, struct video_mbuf *mbuf)
|
|
{
|
|
struct vivi_fh *fh=priv;
|
|
struct videobuf_queue *q=&fh->vb_vidq;
|
|
struct v4l2_requestbuffers req;
|
|
unsigned int i, ret;
|
|
|
|
req.type = q->type;
|
|
req.count = 8;
|
|
req.memory = V4L2_MEMORY_MMAP;
|
|
ret = videobuf_reqbufs(q,&req);
|
|
if (ret < 0)
|
|
return (ret);
|
|
|
|
mbuf->frames = req.count;
|
|
mbuf->size = 0;
|
|
for (i = 0; i < mbuf->frames; i++) {
|
|
mbuf->offsets[i] = q->bufs[i]->boff;
|
|
mbuf->size += q->bufs[i]->bsize;
|
|
}
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
int vidioc_streamon (struct file *file, void *priv, enum v4l2_buf_type i)
|
|
{
|
|
struct vivi_fh *fh=priv;
|
|
struct vivi_dev *dev = fh->dev;
|
|
|
|
if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
if (i != fh->type)
|
|
return -EINVAL;
|
|
|
|
if (!res_get(dev,fh))
|
|
return -EBUSY;
|
|
return (videobuf_streamon(&fh->vb_vidq));
|
|
}
|
|
|
|
int vidioc_streamoff (struct file *file, void *priv, enum v4l2_buf_type i)
|
|
{
|
|
struct vivi_fh *fh=priv;
|
|
struct vivi_dev *dev = fh->dev;
|
|
|
|
if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
if (i != fh->type)
|
|
return -EINVAL;
|
|
|
|
videobuf_streamoff(&fh->vb_vidq);
|
|
res_free(dev,fh);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static struct v4l2_tvnorm tvnorms[] = {
|
|
{
|
|
.name = "NTSC-M",
|
|
.id = V4L2_STD_NTSC_M,
|
|
}
|
|
};
|
|
|
|
static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id a)
|
|
{
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* only one input in this sample driver */
|
|
static int vidioc_enum_input (struct file *file, void *priv,
|
|
struct v4l2_input *inp)
|
|
{
|
|
if (inp->index != 0)
|
|
return -EINVAL;
|
|
|
|
inp->type = V4L2_INPUT_TYPE_CAMERA;
|
|
inp->std = V4L2_STD_NTSC_M;
|
|
strcpy(inp->name,"Camera");
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int vidioc_g_input (struct file *file, void *priv, unsigned int *i)
|
|
{
|
|
*i = 0;
|
|
|
|
return (0);
|
|
}
|
|
static int vidioc_s_input (struct file *file, void *priv, unsigned int i)
|
|
{
|
|
if (i > 0)
|
|
return -EINVAL;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* --- controls ---------------------------------------------- */
|
|
static int vidioc_queryctrl (struct file *file, void *priv,
|
|
struct v4l2_queryctrl *qc)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
|
|
if (qc->id && qc->id == vivi_qctrl[i].id) {
|
|
memcpy(qc, &(vivi_qctrl[i]),
|
|
sizeof(*qc));
|
|
return (0);
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int vidioc_g_ctrl (struct file *file, void *priv,
|
|
struct v4l2_control *ctrl)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
|
|
if (ctrl->id == vivi_qctrl[i].id) {
|
|
ctrl->value=qctl_regs[i];
|
|
return (0);
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
static int vidioc_s_ctrl (struct file *file, void *priv,
|
|
struct v4l2_control *ctrl)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
|
|
if (ctrl->id == vivi_qctrl[i].id) {
|
|
if (ctrl->value <
|
|
vivi_qctrl[i].minimum
|
|
|| ctrl->value >
|
|
vivi_qctrl[i].maximum) {
|
|
return (-ERANGE);
|
|
}
|
|
qctl_regs[i]=ctrl->value;
|
|
return (0);
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------
|
|
File operations for the device
|
|
------------------------------------------------------------------*/
|
|
|
|
#define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
|
|
|
|
static int vivi_open(struct inode *inode, struct file *file)
|
|
{
|
|
int minor = iminor(inode);
|
|
struct vivi_dev *h,*dev = NULL;
|
|
struct vivi_fh *fh;
|
|
struct list_head *list;
|
|
enum v4l2_buf_type type = 0;
|
|
int i;
|
|
|
|
printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
|
|
|
|
list_for_each(list,&vivi_devlist) {
|
|
h = list_entry(list, struct vivi_dev, vivi_devlist);
|
|
if (h->vfd.minor == minor) {
|
|
dev = h;
|
|
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
}
|
|
}
|
|
if (NULL == dev)
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
/* If more than one user, mutex should be added */
|
|
dev->users++;
|
|
|
|
dprintk(1,"open minor=%d type=%s users=%d\n",
|
|
minor,v4l2_type_names[type],dev->users);
|
|
|
|
/* allocate + initialize per filehandle data */
|
|
fh = kzalloc(sizeof(*fh),GFP_KERNEL);
|
|
if (NULL == fh) {
|
|
dev->users--;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
file->private_data = fh;
|
|
fh->dev = dev;
|
|
|
|
fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
fh->fmt = &format;
|
|
fh->width = 640;
|
|
fh->height = 480;
|
|
|
|
/* Put all controls at a sane state */
|
|
for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
|
|
qctl_regs[i] =vivi_qctrl[i].default_value;
|
|
|
|
dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
|
|
(unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
|
|
dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
|
|
dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
|
|
|
|
/* Resets frame counters */
|
|
dev->h=0;
|
|
dev->m=0;
|
|
dev->s=0;
|
|
dev->us=0;
|
|
dev->jiffies=jiffies;
|
|
sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
|
|
dev->h,dev->m,dev->s,(dev->us+500)/1000);
|
|
|
|
videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops,
|
|
NULL, NULL,
|
|
fh->type,
|
|
V4L2_FIELD_INTERLACED,
|
|
sizeof(struct vivi_buffer),fh);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t
|
|
vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
|
|
{
|
|
struct vivi_fh *fh = file->private_data;
|
|
|
|
if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
|
|
if (res_locked(fh->dev))
|
|
return -EBUSY;
|
|
return videobuf_read_one(&fh->vb_vidq, data, count, ppos,
|
|
file->f_flags & O_NONBLOCK);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int
|
|
vivi_poll(struct file *file, struct poll_table_struct *wait)
|
|
{
|
|
struct vivi_fh *fh = file->private_data;
|
|
struct vivi_buffer *buf;
|
|
|
|
dprintk(1,"%s\n",__FUNCTION__);
|
|
|
|
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
|
|
return POLLERR;
|
|
|
|
if (res_get(fh->dev,fh)) {
|
|
dprintk(1,"poll: mmap interface\n");
|
|
/* streaming capture */
|
|
if (list_empty(&fh->vb_vidq.stream))
|
|
return POLLERR;
|
|
buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream);
|
|
} else {
|
|
dprintk(1,"poll: read() interface\n");
|
|
/* read() capture */
|
|
buf = (struct vivi_buffer*)fh->vb_vidq.read_buf;
|
|
if (NULL == buf)
|
|
return POLLERR;
|
|
}
|
|
poll_wait(file, &buf->vb.done, wait);
|
|
if (buf->vb.state == STATE_DONE ||
|
|
buf->vb.state == STATE_ERROR)
|
|
return POLLIN|POLLRDNORM;
|
|
return 0;
|
|
}
|
|
|
|
static int vivi_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct vivi_fh *fh = file->private_data;
|
|
struct vivi_dev *dev = fh->dev;
|
|
struct vivi_dmaqueue *vidq = &dev->vidq;
|
|
|
|
int minor = iminor(inode);
|
|
|
|
vivi_stop_thread(vidq);
|
|
videobuf_mmap_free(&fh->vb_vidq);
|
|
|
|
kfree (fh);
|
|
|
|
dev->users--;
|
|
|
|
printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
vivi_mmap(struct file *file, struct vm_area_struct * vma)
|
|
{
|
|
struct vivi_fh *fh = file->private_data;
|
|
int ret;
|
|
|
|
dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
|
|
|
|
ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
|
|
|
|
dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
|
|
(unsigned long)vma->vm_start,
|
|
(unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
|
|
ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct file_operations vivi_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = vivi_open,
|
|
.release = vivi_release,
|
|
.read = vivi_read,
|
|
.poll = vivi_poll,
|
|
.ioctl = video_ioctl2, /* V4L2 ioctl handler */
|
|
.mmap = vivi_mmap,
|
|
.llseek = no_llseek,
|
|
};
|
|
|
|
static struct video_device vivi = {
|
|
.name = "vivi",
|
|
.type = VID_TYPE_CAPTURE,
|
|
.hardware = 0,
|
|
.fops = &vivi_fops,
|
|
.minor = -1,
|
|
// .release = video_device_release,
|
|
|
|
.vidioc_querycap = vidioc_querycap,
|
|
.vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
|
|
.vidioc_g_fmt_cap = vidioc_g_fmt_cap,
|
|
.vidioc_try_fmt_cap = vidioc_try_fmt_cap,
|
|
.vidioc_s_fmt_cap = vidioc_s_fmt_cap,
|
|
.vidioc_reqbufs = vidioc_reqbufs,
|
|
.vidioc_querybuf = vidioc_querybuf,
|
|
.vidioc_qbuf = vidioc_qbuf,
|
|
.vidioc_dqbuf = vidioc_dqbuf,
|
|
.vidioc_s_std = vidioc_s_std,
|
|
.vidioc_enum_input = vidioc_enum_input,
|
|
.vidioc_g_input = vidioc_g_input,
|
|
.vidioc_s_input = vidioc_s_input,
|
|
.vidioc_queryctrl = vidioc_queryctrl,
|
|
.vidioc_g_ctrl = vidioc_g_ctrl,
|
|
.vidioc_s_ctrl = vidioc_s_ctrl,
|
|
.vidioc_streamon = vidioc_streamon,
|
|
.vidioc_streamoff = vidioc_streamoff,
|
|
#ifdef HAVE_V4L1
|
|
.vidiocgmbuf = vidiocgmbuf,
|
|
#endif
|
|
.tvnorms = tvnorms,
|
|
.tvnormsize = ARRAY_SIZE(tvnorms),
|
|
};
|
|
/* -----------------------------------------------------------------
|
|
Initialization and module stuff
|
|
------------------------------------------------------------------*/
|
|
|
|
static int __init vivi_init(void)
|
|
{
|
|
int ret;
|
|
struct vivi_dev *dev;
|
|
|
|
dev = kzalloc(sizeof(*dev),GFP_KERNEL);
|
|
if (NULL == dev)
|
|
return -ENOMEM;
|
|
list_add_tail(&dev->vivi_devlist,&vivi_devlist);
|
|
|
|
/* init video dma queues */
|
|
INIT_LIST_HEAD(&dev->vidq.active);
|
|
INIT_LIST_HEAD(&dev->vidq.queued);
|
|
|
|
/* initialize locks */
|
|
init_MUTEX(&dev->lock);
|
|
|
|
dev->vidq.timeout.function = vivi_vid_timeout;
|
|
dev->vidq.timeout.data = (unsigned long)dev;
|
|
init_timer(&dev->vidq.timeout);
|
|
|
|
ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
|
|
printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit vivi_exit(void)
|
|
{
|
|
struct vivi_dev *h;
|
|
struct list_head *list;
|
|
|
|
list_for_each(list,&vivi_devlist) {
|
|
h = list_entry(list, struct vivi_dev, vivi_devlist);
|
|
kfree (h);
|
|
}
|
|
video_unregister_device(&vivi);
|
|
}
|
|
|
|
module_init(vivi_init);
|
|
module_exit(vivi_exit);
|
|
|
|
MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
|
|
MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
|
|
module_param(video_nr, int, 0);
|
|
|
|
module_param_named(debug,vivi.debug, int, 0644);
|
|
MODULE_PARM_DESC(debug,"activates debug info");
|
|
|
|
module_param(vid_limit,int,0644);
|
|
MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
|
|
|