1178 lines
27 KiB
C
1178 lines
27 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/mutex.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/videobuf-vmalloc.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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#include <linux/freezer.h>
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#define VIVI_MODULE_NAME "vivi"
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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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#include "font.h"
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#define VIVI_MAJOR_VERSION 0
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#define VIVI_MINOR_VERSION 5
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#define VIVI_RELEASE 0
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#define VIVI_VERSION \
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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 int video_nr = -1; /* /dev/videoN, -1 for autodetect */
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static int n_devs = 1; /* Number of virtual devices */
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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(dev, level, fmt, arg...) \
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do { \
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if (dev->vfd->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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};
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struct vivi_dmaqueue {
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struct list_head active;
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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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spinlock_t slock;
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struct mutex mutex;
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int users;
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/* various device info */
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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, ms;
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unsigned long jiffies;
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char timestr[13];
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int mv_count; /* Controls bars movement */
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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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BLACK,
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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}, /* black */
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};
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#define TO_Y(r, g, b) \
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(((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) \
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(((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) \
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(((-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 gen_line(char *basep, int inipos, int wmax,
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int hmax, int line, int count, char *timestr)
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{
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int w, i, j, y;
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int pos = inipos;
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char *p, *s;
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u8 chr, r, g, b, color;
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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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int colorpos = ((w + count) * 8/(wmax + 1)) % 8;
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r = bars[colorpos][0];
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g = bars[colorpos][1];
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b = bars[colorpos][2];
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for (color = 0; color < 4; color++) {
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p = basep + 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); /* Luma */
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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)) {
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/* Font color*/
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r = 0;
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g = 198;
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b = 0;
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} else {
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/* Background color */
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r = bars[BLACK][0];
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g = bars[BLACK][1];
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b = bars[BLACK][2];
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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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p = basep + 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); /* Luma */
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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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return;
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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 timeval ts;
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char *tmpbuf;
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void *vbuf = videobuf_to_vmalloc(&buf->vb);
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if (!vbuf)
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return;
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tmpbuf = kmalloc(wmax * 2, GFP_ATOMIC);
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if (!tmpbuf)
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return;
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for (h = 0; h < hmax; h++) {
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gen_line(tmpbuf, 0, wmax, hmax, h, dev->mv_count,
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dev->timestr);
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memcpy(vbuf + pos, tmpbuf, wmax * 2);
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pos += wmax*2;
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}
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dev->mv_count++;
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kfree(tmpbuf);
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/* Updates stream time */
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dev->ms += jiffies_to_msecs(jiffies-dev->jiffies);
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dev->jiffies = jiffies;
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if (dev->ms >= 1000) {
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dev->ms -= 1000;
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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->ms);
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dprintk(dev, 2, "vivifill at %s: Buffer 0x%08lx size= %d\n",
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dev->timestr, (unsigned long)tmpbuf, pos);
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/* Advice that buffer was filled */
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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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buf->vb.state = VIDEOBUF_DONE;
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}
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static void vivi_thread_tick(struct vivi_fh *fh)
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{
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struct vivi_buffer *buf;
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struct vivi_dev *dev = fh->dev;
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struct vivi_dmaqueue *dma_q = &dev->vidq;
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unsigned long flags = 0;
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dprintk(dev, 1, "Thread tick\n");
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spin_lock_irqsave(&dev->slock, flags);
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if (list_empty(&dma_q->active)) {
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dprintk(dev, 1, "No active queue to serve\n");
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goto unlock;
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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 on this buffer, return */
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if (!waitqueue_active(&buf->vb.done))
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goto unlock;
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list_del(&buf->vb.queue);
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do_gettimeofday(&buf->vb.ts);
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/* Fill buffer */
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vivi_fillbuff(dev, buf);
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dprintk(dev, 1, "filled buffer %p\n", buf);
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wake_up(&buf->vb.done);
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dprintk(dev, 2, "[%p/%d] wakeup\n", buf, buf->vb. i);
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unlock:
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spin_unlock_irqrestore(&dev->slock, flags);
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return;
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}
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#define frames_to_ms(frames) \
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((frames * WAKE_NUMERATOR * 1000) / WAKE_DENOMINATOR)
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static void vivi_sleep(struct vivi_fh *fh)
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{
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struct vivi_dev *dev = fh->dev;
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struct vivi_dmaqueue *dma_q = &dev->vidq;
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int timeout;
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DECLARE_WAITQUEUE(wait, current);
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dprintk(dev, 1, "%s dma_q=0x%08lx\n", __func__,
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(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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goto stop_task;
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/* Calculate time to wake up */
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timeout = msecs_to_jiffies(frames_to_ms(1));
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vivi_thread_tick(fh);
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schedule_timeout_interruptible(timeout);
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stop_task:
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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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|
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static int vivi_thread(void *data)
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{
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struct vivi_fh *fh = data;
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struct vivi_dev *dev = fh->dev;
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dprintk(dev, 1, "thread started\n");
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set_freezable();
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for (;;) {
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vivi_sleep(fh);
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if (kthread_should_stop())
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break;
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}
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dprintk(dev, 1, "thread: exit\n");
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return 0;
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}
|
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|
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static int vivi_start_thread(struct vivi_fh *fh)
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{
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struct vivi_dev *dev = fh->dev;
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struct vivi_dmaqueue *dma_q = &dev->vidq;
|
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|
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dma_q->frame = 0;
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dma_q->ini_jiffies = jiffies;
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|
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dprintk(dev, 1, "%s\n", __func__);
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|
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dma_q->kthread = kthread_run(vivi_thread, fh, "vivi");
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|
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if (IS_ERR(dma_q->kthread)) {
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printk(KERN_ERR "vivi: kernel_thread() failed\n");
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return PTR_ERR(dma_q->kthread);
|
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}
|
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/* Wakes thread */
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wake_up_interruptible(&dma_q->wq);
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|
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dprintk(dev, 1, "returning from %s\n", __func__);
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return 0;
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}
|
|
|
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static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
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{
|
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struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
|
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|
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dprintk(dev, 1, "%s\n", __func__);
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/* shutdown control thread */
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if (dma_q->kthread) {
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kthread_stop(dma_q->kthread);
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dma_q->kthread = NULL;
|
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}
|
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}
|
|
|
|
/* ------------------------------------------------------------------
|
|
Videobuf operations
|
|
------------------------------------------------------------------*/
|
|
static int
|
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buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
|
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{
|
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struct vivi_fh *fh = vq->priv_data;
|
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struct vivi_dev *dev = fh->dev;
|
|
|
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*size = fh->width*fh->height*2;
|
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|
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if (0 == *count)
|
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*count = 32;
|
|
|
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while (*size * *count > vid_limit * 1024 * 1024)
|
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(*count)--;
|
|
|
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dprintk(dev, 1, "%s, count=%d, size=%d\n", __func__,
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*count, *size);
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|
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return 0;
|
|
}
|
|
|
|
static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
|
|
{
|
|
struct vivi_fh *fh = vq->priv_data;
|
|
struct vivi_dev *dev = fh->dev;
|
|
|
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dprintk(dev, 1, "%s, state: %i\n", __func__, buf->vb.state);
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|
|
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if (in_interrupt())
|
|
BUG();
|
|
|
|
videobuf_vmalloc_free(&buf->vb);
|
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dprintk(dev, 1, "free_buffer: freed\n");
|
|
buf->vb.state = VIDEOBUF_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_dev *dev = fh->dev;
|
|
struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
|
|
int rc;
|
|
|
|
dprintk(dev, 1, "%s, field=%d\n", __func__, 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;
|
|
|
|
/* These properties only change when queue is idle, see s_fmt */
|
|
buf->fmt = fh->fmt;
|
|
buf->vb.width = fh->width;
|
|
buf->vb.height = fh->height;
|
|
buf->vb.field = field;
|
|
|
|
if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
|
|
rc = videobuf_iolock(vq, &buf->vb, NULL);
|
|
if (rc < 0)
|
|
goto fail;
|
|
}
|
|
|
|
buf->vb.state = VIDEOBUF_PREPARED;
|
|
|
|
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;
|
|
|
|
dprintk(dev, 1, "%s\n", __func__);
|
|
|
|
buf->vb.state = VIDEOBUF_QUEUED;
|
|
list_add_tail(&buf->vb.queue, &vidq->active);
|
|
}
|
|
|
|
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;
|
|
|
|
dprintk(dev, 1, "%s\n", __func__);
|
|
|
|
free_buffer(vq, buf);
|
|
}
|
|
|
|
static struct videobuf_queue_ops vivi_video_qops = {
|
|
.buf_setup = buffer_setup,
|
|
.buf_prepare = buffer_prepare,
|
|
.buf_queue = buffer_queue,
|
|
.buf_release = buffer_release,
|
|
};
|
|
|
|
/* ------------------------------------------------------------------
|
|
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_vid_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_vid_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_vid_cap(struct file *file, void *priv,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct vivi_fh *fh = priv;
|
|
struct vivi_dev *dev = fh->dev;
|
|
struct vivi_fmt *fmt;
|
|
enum v4l2_field field;
|
|
unsigned int maxw, maxh;
|
|
|
|
if (format.fourcc != f->fmt.pix.pixelformat) {
|
|
dprintk(dev, 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;
|
|
} else if (V4L2_FIELD_INTERLACED != field) {
|
|
dprintk(dev, 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_vid_cap(struct file *file, void *priv,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct vivi_fh *fh = priv;
|
|
struct videobuf_queue *q = &fh->vb_vidq;
|
|
|
|
int ret = vidioc_try_fmt_vid_cap(file, fh, f);
|
|
if (ret < 0)
|
|
return (ret);
|
|
|
|
mutex_lock(&q->vb_lock);
|
|
|
|
if (videobuf_queue_is_busy(&fh->vb_vidq)) {
|
|
dprintk(fh->dev, 1, "%s queue busy\n", __func__);
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
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;
|
|
|
|
ret = 0;
|
|
out:
|
|
mutex_unlock(&q->vb_lock);
|
|
|
|
return (ret);
|
|
}
|
|
|
|
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 CONFIG_VIDEO_V4L1_COMPAT
|
|
static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
|
|
{
|
|
struct vivi_fh *fh = priv;
|
|
|
|
return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
|
|
}
|
|
#endif
|
|
|
|
static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
|
|
{
|
|
struct vivi_fh *fh = priv;
|
|
|
|
if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
if (i != fh->type)
|
|
return -EINVAL;
|
|
|
|
return videobuf_streamon(&fh->vb_vidq);
|
|
}
|
|
|
|
static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
|
|
{
|
|
struct vivi_fh *fh = priv;
|
|
|
|
if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
if (i != fh->type)
|
|
return -EINVAL;
|
|
|
|
return videobuf_streamoff(&fh->vb_vidq);
|
|
}
|
|
|
|
static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *i)
|
|
{
|
|
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_525_60;
|
|
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 *dev;
|
|
struct vivi_fh *fh = NULL;
|
|
int i;
|
|
int retval = 0;
|
|
|
|
printk(KERN_DEBUG "vivi: open called (minor=%d)\n", minor);
|
|
|
|
list_for_each_entry(dev, &vivi_devlist, vivi_devlist)
|
|
if (dev->vfd->minor == minor)
|
|
goto found;
|
|
return -ENODEV;
|
|
|
|
found:
|
|
mutex_lock(&dev->mutex);
|
|
dev->users++;
|
|
|
|
if (dev->users > 1) {
|
|
dev->users--;
|
|
retval = -EBUSY;
|
|
goto unlock;
|
|
}
|
|
|
|
dprintk(dev, 1, "open minor=%d type=%s users=%d\n", minor,
|
|
v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
|
|
|
|
/* allocate + initialize per filehandle data */
|
|
fh = kzalloc(sizeof(*fh), GFP_KERNEL);
|
|
if (NULL == fh) {
|
|
dev->users--;
|
|
retval = -ENOMEM;
|
|
goto unlock;
|
|
}
|
|
unlock:
|
|
mutex_unlock(&dev->mutex);
|
|
if (retval)
|
|
return retval;
|
|
|
|
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;
|
|
|
|
/* Resets frame counters */
|
|
dev->h = 0;
|
|
dev->m = 0;
|
|
dev->s = 0;
|
|
dev->ms = 0;
|
|
dev->mv_count = 0;
|
|
dev->jiffies = jiffies;
|
|
sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
|
|
dev->h, dev->m, dev->s, dev->ms);
|
|
|
|
videobuf_queue_vmalloc_init(&fh->vb_vidq, &vivi_video_qops,
|
|
NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
|
|
sizeof(struct vivi_buffer), fh);
|
|
|
|
vivi_start_thread(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) {
|
|
return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0,
|
|
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_dev *dev = fh->dev;
|
|
struct videobuf_queue *q = &fh->vb_vidq;
|
|
|
|
dprintk(dev, 1, "%s\n", __func__);
|
|
|
|
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
|
|
return POLLERR;
|
|
|
|
return videobuf_poll_stream(file, q, wait);
|
|
}
|
|
|
|
static int vivi_close(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_stop(&fh->vb_vidq);
|
|
videobuf_mmap_free(&fh->vb_vidq);
|
|
|
|
kfree(fh);
|
|
|
|
mutex_lock(&dev->mutex);
|
|
dev->users--;
|
|
mutex_unlock(&dev->mutex);
|
|
|
|
dprintk(dev, 1, "close called (minor=%d, users=%d)\n",
|
|
minor, dev->users);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vivi_release(void)
|
|
{
|
|
struct vivi_dev *dev;
|
|
struct list_head *list;
|
|
|
|
while (!list_empty(&vivi_devlist)) {
|
|
list = vivi_devlist.next;
|
|
list_del(list);
|
|
dev = list_entry(list, struct vivi_dev, vivi_devlist);
|
|
|
|
if (-1 != dev->vfd->minor) {
|
|
video_unregister_device(dev->vfd);
|
|
printk(KERN_INFO "%s: /dev/video%d unregistered.\n",
|
|
VIVI_MODULE_NAME, dev->vfd->minor);
|
|
} else {
|
|
video_device_release(dev->vfd);
|
|
printk(KERN_INFO "%s: /dev/video%d released.\n",
|
|
VIVI_MODULE_NAME, dev->vfd->minor);
|
|
}
|
|
|
|
kfree(dev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vivi_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
struct vivi_fh *fh = file->private_data;
|
|
struct vivi_dev *dev = fh->dev;
|
|
int ret;
|
|
|
|
dprintk(dev, 1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
|
|
|
|
ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
|
|
|
|
dprintk(dev, 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 const struct file_operations vivi_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = vivi_open,
|
|
.release = vivi_close,
|
|
.read = vivi_read,
|
|
.poll = vivi_poll,
|
|
.ioctl = video_ioctl2, /* V4L2 ioctl handler */
|
|
.compat_ioctl = v4l_compat_ioctl32,
|
|
.mmap = vivi_mmap,
|
|
.llseek = no_llseek,
|
|
};
|
|
|
|
static struct video_device vivi_template = {
|
|
.name = "vivi",
|
|
.type = VID_TYPE_CAPTURE,
|
|
.fops = &vivi_fops,
|
|
.minor = -1,
|
|
.release = video_device_release,
|
|
|
|
.vidioc_querycap = vidioc_querycap,
|
|
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
|
|
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
|
|
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
|
|
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_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 CONFIG_VIDEO_V4L1_COMPAT
|
|
.vidiocgmbuf = vidiocgmbuf,
|
|
#endif
|
|
.tvnorms = V4L2_STD_525_60,
|
|
.current_norm = V4L2_STD_NTSC_M,
|
|
};
|
|
/* -----------------------------------------------------------------
|
|
Initialization and module stuff
|
|
------------------------------------------------------------------*/
|
|
|
|
static int __init vivi_init(void)
|
|
{
|
|
int ret = -ENOMEM, i;
|
|
struct vivi_dev *dev;
|
|
struct video_device *vfd;
|
|
|
|
for (i = 0; i < n_devs; i++) {
|
|
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
|
|
if (NULL == dev)
|
|
break;
|
|
|
|
list_add_tail(&dev->vivi_devlist, &vivi_devlist);
|
|
|
|
/* init video dma queues */
|
|
INIT_LIST_HEAD(&dev->vidq.active);
|
|
init_waitqueue_head(&dev->vidq.wq);
|
|
|
|
/* initialize locks */
|
|
spin_lock_init(&dev->slock);
|
|
mutex_init(&dev->mutex);
|
|
|
|
vfd = video_device_alloc();
|
|
if (NULL == vfd)
|
|
break;
|
|
|
|
*vfd = vivi_template;
|
|
|
|
ret = video_register_device(vfd, VFL_TYPE_GRABBER, video_nr);
|
|
if (ret < 0)
|
|
break;
|
|
|
|
snprintf(vfd->name, sizeof(vfd->name), "%s (%i)",
|
|
vivi_template.name, vfd->minor);
|
|
|
|
if (video_nr >= 0)
|
|
video_nr++;
|
|
|
|
dev->vfd = vfd;
|
|
printk(KERN_INFO "%s: V4L2 device registered as /dev/video%d\n",
|
|
VIVI_MODULE_NAME, vfd->minor);
|
|
}
|
|
|
|
if (ret < 0) {
|
|
vivi_release();
|
|
printk(KERN_INFO "Error %d while loading vivi driver\n", ret);
|
|
} else
|
|
printk(KERN_INFO "Video Technology Magazine Virtual Video "
|
|
"Capture Board ver %u.%u.%u successfully loaded.\n",
|
|
(VIVI_VERSION >> 16) & 0xFF, (VIVI_VERSION >> 8) & 0xFF,
|
|
VIVI_VERSION & 0xFF);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit vivi_exit(void)
|
|
{
|
|
vivi_release();
|
|
}
|
|
|
|
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_PARM_DESC(video_nr, "video iminor start number");
|
|
|
|
module_param(n_devs, int, 0);
|
|
MODULE_PARM_DESC(n_devs, "number of video devices to create");
|
|
|
|
module_param_named(debug, vivi_template.debug, int, 0444);
|
|
MODULE_PARM_DESC(debug, "activates debug info");
|
|
|
|
module_param(vid_limit, int, 0644);
|
|
MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");
|