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linux/drivers/media/video/videodev.c
Mauro Carvalho Chehab 057596eea8 V4L/DVB (7133): Fix Kconfig dependencies 
As pointed by Adrian Bunk, with I2C=m and VIDEO_DEV=y, videodev brokes.

This patch moves the functions that videodev needs from v4l2-common. It also
fixes some Kconfig changes.

After this patch, I2C=m / VIDEO_DEV=y will make v4l2 core statically linked
into kernel. v4l2-common will be m, and all V4L drivers will also be m.

This approach is very conservative, since it is possible to have V4L drivers
that don't need I2C or v4l2-common. The better is to map what drivers really
need v4l2-common, making them to select v4l2-common, and allowing the others to
be 'y', 'm' and 'n'.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-02-18 11:14:53 -03:00

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/*
* Video capture interface for Linux version 2
*
* A generic video device interface for the LINUX operating system
* using a set of device structures/vectors for low level operations.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Alan Cox, <alan@redhat.com> (version 1)
* Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
*
* Fixes: 20000516 Claudio Matsuoka <claudio@conectiva.com>
* - Added procfs support
*/
#define dbgarg(cmd, fmt, arg...) \
if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) { \
printk (KERN_DEBUG "%s: ", vfd->name); \
v4l_printk_ioctl(cmd); \
printk (KERN_DEBUG "%s: " fmt, vfd->name, ## arg); \
}
#define dbgarg2(fmt, arg...) \
if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) \
printk (KERN_DEBUG "%s: " fmt, vfd->name, ## arg);
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kmod.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#define __OLD_VIDIOC_ /* To allow fixing old calls*/
#include <linux/videodev2.h>
#ifdef CONFIG_VIDEO_V4L1
#include <linux/videodev.h>
#endif
#include <media/v4l2-common.h>
#include <linux/video_decoder.h>
#define VIDEO_NUM_DEVICES 256
#define VIDEO_NAME "video4linux"
/* video4linux standard ID conversion to standard name
*/
char *v4l2_norm_to_name(v4l2_std_id id)
{
char *name;
u32 myid = id;
/* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
64 bit comparations. So, on that architecture, with some gcc
variants, compilation fails. Currently, the max value is 30bit wide.
*/
BUG_ON(myid != id);
switch (myid) {
case V4L2_STD_PAL:
name = "PAL";
break;
case V4L2_STD_PAL_BG:
name = "PAL-BG";
break;
case V4L2_STD_PAL_DK:
name = "PAL-DK";
break;
case V4L2_STD_PAL_B:
name = "PAL-B";
break;
case V4L2_STD_PAL_B1:
name = "PAL-B1";
break;
case V4L2_STD_PAL_G:
name = "PAL-G";
break;
case V4L2_STD_PAL_H:
name = "PAL-H";
break;
case V4L2_STD_PAL_I:
name = "PAL-I";
break;
case V4L2_STD_PAL_D:
name = "PAL-D";
break;
case V4L2_STD_PAL_D1:
name = "PAL-D1";
break;
case V4L2_STD_PAL_K:
name = "PAL-K";
break;
case V4L2_STD_PAL_M:
name = "PAL-M";
break;
case V4L2_STD_PAL_N:
name = "PAL-N";
break;
case V4L2_STD_PAL_Nc:
name = "PAL-Nc";
break;
case V4L2_STD_PAL_60:
name = "PAL-60";
break;
case V4L2_STD_NTSC:
name = "NTSC";
break;
case V4L2_STD_NTSC_M:
name = "NTSC-M";
break;
case V4L2_STD_NTSC_M_JP:
name = "NTSC-M-JP";
break;
case V4L2_STD_NTSC_443:
name = "NTSC-443";
break;
case V4L2_STD_NTSC_M_KR:
name = "NTSC-M-KR";
break;
case V4L2_STD_SECAM:
name = "SECAM";
break;
case V4L2_STD_SECAM_DK:
name = "SECAM-DK";
break;
case V4L2_STD_SECAM_B:
name = "SECAM-B";
break;
case V4L2_STD_SECAM_D:
name = "SECAM-D";
break;
case V4L2_STD_SECAM_G:
name = "SECAM-G";
break;
case V4L2_STD_SECAM_H:
name = "SECAM-H";
break;
case V4L2_STD_SECAM_K:
name = "SECAM-K";
break;
case V4L2_STD_SECAM_K1:
name = "SECAM-K1";
break;
case V4L2_STD_SECAM_L:
name = "SECAM-L";
break;
case V4L2_STD_SECAM_LC:
name = "SECAM-LC";
break;
default:
name = "Unknown";
break;
}
return name;
}
EXPORT_SYMBOL(v4l2_norm_to_name);
/* Fill in the fields of a v4l2_standard structure according to the
'id' and 'transmission' parameters. Returns negative on error. */
int v4l2_video_std_construct(struct v4l2_standard *vs,
int id, char *name)
{
u32 index = vs->index;
memset(vs, 0, sizeof(struct v4l2_standard));
vs->index = index;
vs->id = id;
if (id & V4L2_STD_525_60) {
vs->frameperiod.numerator = 1001;
vs->frameperiod.denominator = 30000;
vs->framelines = 525;
} else {
vs->frameperiod.numerator = 1;
vs->frameperiod.denominator = 25;
vs->framelines = 625;
}
strlcpy(vs->name, name, sizeof(vs->name));
return 0;
}
EXPORT_SYMBOL(v4l2_video_std_construct);
/* ----------------------------------------------------------------- */
/* some arrays for pretty-printing debug messages of enum types */
char *v4l2_field_names[] = {
[V4L2_FIELD_ANY] = "any",
[V4L2_FIELD_NONE] = "none",
[V4L2_FIELD_TOP] = "top",
[V4L2_FIELD_BOTTOM] = "bottom",
[V4L2_FIELD_INTERLACED] = "interlaced",
[V4L2_FIELD_SEQ_TB] = "seq-tb",
[V4L2_FIELD_SEQ_BT] = "seq-bt",
[V4L2_FIELD_ALTERNATE] = "alternate",
[V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
[V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
};
EXPORT_SYMBOL(v4l2_field_names);
char *v4l2_type_names[] = {
[V4L2_BUF_TYPE_VIDEO_CAPTURE] = "video-cap",
[V4L2_BUF_TYPE_VIDEO_OVERLAY] = "video-over",
[V4L2_BUF_TYPE_VIDEO_OUTPUT] = "video-out",
[V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
[V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
[V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
[V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
[V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "video-out-over",
};
EXPORT_SYMBOL(v4l2_type_names);
static char *v4l2_memory_names[] = {
[V4L2_MEMORY_MMAP] = "mmap",
[V4L2_MEMORY_USERPTR] = "userptr",
[V4L2_MEMORY_OVERLAY] = "overlay",
};
#define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
arr[a] : "unknown")
/* ------------------------------------------------------------------ */
/* debug help functions */
#ifdef CONFIG_VIDEO_V4L1_COMPAT
static const char *v4l1_ioctls[] = {
[_IOC_NR(VIDIOCGCAP)] = "VIDIOCGCAP",
[_IOC_NR(VIDIOCGCHAN)] = "VIDIOCGCHAN",
[_IOC_NR(VIDIOCSCHAN)] = "VIDIOCSCHAN",
[_IOC_NR(VIDIOCGTUNER)] = "VIDIOCGTUNER",
[_IOC_NR(VIDIOCSTUNER)] = "VIDIOCSTUNER",
[_IOC_NR(VIDIOCGPICT)] = "VIDIOCGPICT",
[_IOC_NR(VIDIOCSPICT)] = "VIDIOCSPICT",
[_IOC_NR(VIDIOCCAPTURE)] = "VIDIOCCAPTURE",
[_IOC_NR(VIDIOCGWIN)] = "VIDIOCGWIN",
[_IOC_NR(VIDIOCSWIN)] = "VIDIOCSWIN",
[_IOC_NR(VIDIOCGFBUF)] = "VIDIOCGFBUF",
[_IOC_NR(VIDIOCSFBUF)] = "VIDIOCSFBUF",
[_IOC_NR(VIDIOCKEY)] = "VIDIOCKEY",
[_IOC_NR(VIDIOCGFREQ)] = "VIDIOCGFREQ",
[_IOC_NR(VIDIOCSFREQ)] = "VIDIOCSFREQ",
[_IOC_NR(VIDIOCGAUDIO)] = "VIDIOCGAUDIO",
[_IOC_NR(VIDIOCSAUDIO)] = "VIDIOCSAUDIO",
[_IOC_NR(VIDIOCSYNC)] = "VIDIOCSYNC",
[_IOC_NR(VIDIOCMCAPTURE)] = "VIDIOCMCAPTURE",
[_IOC_NR(VIDIOCGMBUF)] = "VIDIOCGMBUF",
[_IOC_NR(VIDIOCGUNIT)] = "VIDIOCGUNIT",
[_IOC_NR(VIDIOCGCAPTURE)] = "VIDIOCGCAPTURE",
[_IOC_NR(VIDIOCSCAPTURE)] = "VIDIOCSCAPTURE",
[_IOC_NR(VIDIOCSPLAYMODE)] = "VIDIOCSPLAYMODE",
[_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
[_IOC_NR(VIDIOCGPLAYINFO)] = "VIDIOCGPLAYINFO",
[_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
[_IOC_NR(VIDIOCGVBIFMT)] = "VIDIOCGVBIFMT",
[_IOC_NR(VIDIOCSVBIFMT)] = "VIDIOCSVBIFMT"
};
#define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
#endif
static const char *v4l2_ioctls[] = {
[_IOC_NR(VIDIOC_QUERYCAP)] = "VIDIOC_QUERYCAP",
[_IOC_NR(VIDIOC_RESERVED)] = "VIDIOC_RESERVED",
[_IOC_NR(VIDIOC_ENUM_FMT)] = "VIDIOC_ENUM_FMT",
[_IOC_NR(VIDIOC_G_FMT)] = "VIDIOC_G_FMT",
[_IOC_NR(VIDIOC_S_FMT)] = "VIDIOC_S_FMT",
[_IOC_NR(VIDIOC_REQBUFS)] = "VIDIOC_REQBUFS",
[_IOC_NR(VIDIOC_QUERYBUF)] = "VIDIOC_QUERYBUF",
[_IOC_NR(VIDIOC_G_FBUF)] = "VIDIOC_G_FBUF",
[_IOC_NR(VIDIOC_S_FBUF)] = "VIDIOC_S_FBUF",
[_IOC_NR(VIDIOC_OVERLAY)] = "VIDIOC_OVERLAY",
[_IOC_NR(VIDIOC_QBUF)] = "VIDIOC_QBUF",
[_IOC_NR(VIDIOC_DQBUF)] = "VIDIOC_DQBUF",
[_IOC_NR(VIDIOC_STREAMON)] = "VIDIOC_STREAMON",
[_IOC_NR(VIDIOC_STREAMOFF)] = "VIDIOC_STREAMOFF",
[_IOC_NR(VIDIOC_G_PARM)] = "VIDIOC_G_PARM",
[_IOC_NR(VIDIOC_S_PARM)] = "VIDIOC_S_PARM",
[_IOC_NR(VIDIOC_G_STD)] = "VIDIOC_G_STD",
[_IOC_NR(VIDIOC_S_STD)] = "VIDIOC_S_STD",
[_IOC_NR(VIDIOC_ENUMSTD)] = "VIDIOC_ENUMSTD",
[_IOC_NR(VIDIOC_ENUMINPUT)] = "VIDIOC_ENUMINPUT",
[_IOC_NR(VIDIOC_G_CTRL)] = "VIDIOC_G_CTRL",
[_IOC_NR(VIDIOC_S_CTRL)] = "VIDIOC_S_CTRL",
[_IOC_NR(VIDIOC_G_TUNER)] = "VIDIOC_G_TUNER",
[_IOC_NR(VIDIOC_S_TUNER)] = "VIDIOC_S_TUNER",
[_IOC_NR(VIDIOC_G_AUDIO)] = "VIDIOC_G_AUDIO",
[_IOC_NR(VIDIOC_S_AUDIO)] = "VIDIOC_S_AUDIO",
[_IOC_NR(VIDIOC_QUERYCTRL)] = "VIDIOC_QUERYCTRL",
[_IOC_NR(VIDIOC_QUERYMENU)] = "VIDIOC_QUERYMENU",
[_IOC_NR(VIDIOC_G_INPUT)] = "VIDIOC_G_INPUT",
[_IOC_NR(VIDIOC_S_INPUT)] = "VIDIOC_S_INPUT",
[_IOC_NR(VIDIOC_G_OUTPUT)] = "VIDIOC_G_OUTPUT",
[_IOC_NR(VIDIOC_S_OUTPUT)] = "VIDIOC_S_OUTPUT",
[_IOC_NR(VIDIOC_ENUMOUTPUT)] = "VIDIOC_ENUMOUTPUT",
[_IOC_NR(VIDIOC_G_AUDOUT)] = "VIDIOC_G_AUDOUT",
[_IOC_NR(VIDIOC_S_AUDOUT)] = "VIDIOC_S_AUDOUT",
[_IOC_NR(VIDIOC_G_MODULATOR)] = "VIDIOC_G_MODULATOR",
[_IOC_NR(VIDIOC_S_MODULATOR)] = "VIDIOC_S_MODULATOR",
[_IOC_NR(VIDIOC_G_FREQUENCY)] = "VIDIOC_G_FREQUENCY",
[_IOC_NR(VIDIOC_S_FREQUENCY)] = "VIDIOC_S_FREQUENCY",
[_IOC_NR(VIDIOC_CROPCAP)] = "VIDIOC_CROPCAP",
[_IOC_NR(VIDIOC_G_CROP)] = "VIDIOC_G_CROP",
[_IOC_NR(VIDIOC_S_CROP)] = "VIDIOC_S_CROP",
[_IOC_NR(VIDIOC_G_JPEGCOMP)] = "VIDIOC_G_JPEGCOMP",
[_IOC_NR(VIDIOC_S_JPEGCOMP)] = "VIDIOC_S_JPEGCOMP",
[_IOC_NR(VIDIOC_QUERYSTD)] = "VIDIOC_QUERYSTD",
[_IOC_NR(VIDIOC_TRY_FMT)] = "VIDIOC_TRY_FMT",
[_IOC_NR(VIDIOC_ENUMAUDIO)] = "VIDIOC_ENUMAUDIO",
[_IOC_NR(VIDIOC_ENUMAUDOUT)] = "VIDIOC_ENUMAUDOUT",
[_IOC_NR(VIDIOC_G_PRIORITY)] = "VIDIOC_G_PRIORITY",
[_IOC_NR(VIDIOC_S_PRIORITY)] = "VIDIOC_S_PRIORITY",
[_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
[_IOC_NR(VIDIOC_LOG_STATUS)] = "VIDIOC_LOG_STATUS",
[_IOC_NR(VIDIOC_G_EXT_CTRLS)] = "VIDIOC_G_EXT_CTRLS",
[_IOC_NR(VIDIOC_S_EXT_CTRLS)] = "VIDIOC_S_EXT_CTRLS",
[_IOC_NR(VIDIOC_TRY_EXT_CTRLS)] = "VIDIOC_TRY_EXT_CTRLS",
#if 1
[_IOC_NR(VIDIOC_ENUM_FRAMESIZES)] = "VIDIOC_ENUM_FRAMESIZES",
[_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
[_IOC_NR(VIDIOC_G_ENC_INDEX)] = "VIDIOC_G_ENC_INDEX",
[_IOC_NR(VIDIOC_ENCODER_CMD)] = "VIDIOC_ENCODER_CMD",
[_IOC_NR(VIDIOC_TRY_ENCODER_CMD)] = "VIDIOC_TRY_ENCODER_CMD",
[_IOC_NR(VIDIOC_DBG_S_REGISTER)] = "VIDIOC_DBG_S_REGISTER",
[_IOC_NR(VIDIOC_DBG_G_REGISTER)] = "VIDIOC_DBG_G_REGISTER",
[_IOC_NR(VIDIOC_G_CHIP_IDENT)] = "VIDIOC_G_CHIP_IDENT",
#endif
};
#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
static const char *v4l2_int_ioctls[] = {
#ifdef CONFIG_VIDEO_V4L1_COMPAT
[_IOC_NR(DECODER_GET_CAPABILITIES)] = "DECODER_GET_CAPABILITIES",
[_IOC_NR(DECODER_GET_STATUS)] = "DECODER_GET_STATUS",
[_IOC_NR(DECODER_SET_NORM)] = "DECODER_SET_NORM",
[_IOC_NR(DECODER_SET_INPUT)] = "DECODER_SET_INPUT",
[_IOC_NR(DECODER_SET_OUTPUT)] = "DECODER_SET_OUTPUT",
[_IOC_NR(DECODER_ENABLE_OUTPUT)] = "DECODER_ENABLE_OUTPUT",
[_IOC_NR(DECODER_SET_PICTURE)] = "DECODER_SET_PICTURE",
[_IOC_NR(DECODER_SET_GPIO)] = "DECODER_SET_GPIO",
[_IOC_NR(DECODER_INIT)] = "DECODER_INIT",
[_IOC_NR(DECODER_SET_VBI_BYPASS)] = "DECODER_SET_VBI_BYPASS",
[_IOC_NR(DECODER_DUMP)] = "DECODER_DUMP",
#endif
[_IOC_NR(AUDC_SET_RADIO)] = "AUDC_SET_RADIO",
[_IOC_NR(TUNER_SET_TYPE_ADDR)] = "TUNER_SET_TYPE_ADDR",
[_IOC_NR(TUNER_SET_STANDBY)] = "TUNER_SET_STANDBY",
[_IOC_NR(TUNER_SET_CONFIG)] = "TUNER_SET_CONFIG",
[_IOC_NR(VIDIOC_INT_S_TUNER_MODE)] = "VIDIOC_INT_S_TUNER_MODE",
[_IOC_NR(VIDIOC_INT_RESET)] = "VIDIOC_INT_RESET",
[_IOC_NR(VIDIOC_INT_AUDIO_CLOCK_FREQ)] = "VIDIOC_INT_AUDIO_CLOCK_FREQ",
[_IOC_NR(VIDIOC_INT_DECODE_VBI_LINE)] = "VIDIOC_INT_DECODE_VBI_LINE",
[_IOC_NR(VIDIOC_INT_S_VBI_DATA)] = "VIDIOC_INT_S_VBI_DATA",
[_IOC_NR(VIDIOC_INT_G_VBI_DATA)] = "VIDIOC_INT_G_VBI_DATA",
[_IOC_NR(VIDIOC_INT_I2S_CLOCK_FREQ)] = "VIDIOC_INT_I2S_CLOCK_FREQ",
[_IOC_NR(VIDIOC_INT_S_STANDBY)] = "VIDIOC_INT_S_STANDBY",
[_IOC_NR(VIDIOC_INT_S_AUDIO_ROUTING)] = "VIDIOC_INT_S_AUDIO_ROUTING",
[_IOC_NR(VIDIOC_INT_G_AUDIO_ROUTING)] = "VIDIOC_INT_G_AUDIO_ROUTING",
[_IOC_NR(VIDIOC_INT_S_VIDEO_ROUTING)] = "VIDIOC_INT_S_VIDEO_ROUTING",
[_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)] = "VIDIOC_INT_G_VIDEO_ROUTING",
[_IOC_NR(VIDIOC_INT_S_CRYSTAL_FREQ)] = "VIDIOC_INT_S_CRYSTAL_FREQ",
[_IOC_NR(VIDIOC_INT_INIT)] = "VIDIOC_INT_INIT",
[_IOC_NR(VIDIOC_INT_G_STD_OUTPUT)] = "VIDIOC_INT_G_STD_OUTPUT",
[_IOC_NR(VIDIOC_INT_S_STD_OUTPUT)] = "VIDIOC_INT_S_STD_OUTPUT",
};
#define V4L2_INT_IOCTLS ARRAY_SIZE(v4l2_int_ioctls)
/* Common ioctl debug function. This function can be used by
external ioctl messages as well as internal V4L ioctl */
void v4l_printk_ioctl(unsigned int cmd)
{
char *dir;
switch (_IOC_DIR(cmd)) {
case _IOC_NONE: dir = "--"; break;
case _IOC_READ: dir = "r-"; break;
case _IOC_WRITE: dir = "-w"; break;
case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
default: dir = "*ERR*"; break;
}
switch (_IOC_TYPE(cmd)) {
case 'd':
printk("v4l2_int ioctl %s, dir=%s (0x%08x)\n",
(_IOC_NR(cmd) < V4L2_INT_IOCTLS) ?
v4l2_int_ioctls[_IOC_NR(cmd)] : "UNKNOWN", dir, cmd);
break;
#ifdef CONFIG_VIDEO_V4L1_COMPAT
case 'v':
printk("v4l1 ioctl %s, dir=%s (0x%08x)\n",
(_IOC_NR(cmd) < V4L1_IOCTLS) ?
v4l1_ioctls[_IOC_NR(cmd)] : "UNKNOWN", dir, cmd);
break;
#endif
case 'V':
printk("v4l2 ioctl %s, dir=%s (0x%08x)\n",
(_IOC_NR(cmd) < V4L2_IOCTLS) ?
v4l2_ioctls[_IOC_NR(cmd)] : "UNKNOWN", dir, cmd);
break;
default:
printk("unknown ioctl '%c', dir=%s, #%d (0x%08x)\n",
_IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
}
}
EXPORT_SYMBOL(v4l_printk_ioctl);
/*
* sysfs stuff
*/
static ssize_t show_name(struct device *cd,
struct device_attribute *attr, char *buf)
{
struct video_device *vfd = container_of(cd, struct video_device,
class_dev);
return sprintf(buf, "%.*s\n", (int)sizeof(vfd->name), vfd->name);
}
struct video_device *video_device_alloc(void)
{
struct video_device *vfd;
vfd = kzalloc(sizeof(*vfd),GFP_KERNEL);
return vfd;
}
EXPORT_SYMBOL(video_device_alloc);
void video_device_release(struct video_device *vfd)
{
kfree(vfd);
}
EXPORT_SYMBOL(video_device_release);
static void video_release(struct device *cd)
{
struct video_device *vfd = container_of(cd, struct video_device,
class_dev);
#if 1
/* needed until all drivers are fixed */
if (!vfd->release)
return;
#endif
vfd->release(vfd);
}
static struct device_attribute video_device_attrs[] = {
__ATTR(name, S_IRUGO, show_name, NULL),
__ATTR_NULL
};
static struct class video_class = {
.name = VIDEO_NAME,
.dev_attrs = video_device_attrs,
.dev_release = video_release,
};
/*
* Active devices
*/
static struct video_device *video_device[VIDEO_NUM_DEVICES];
static DEFINE_MUTEX(videodev_lock);
struct video_device* video_devdata(struct file *file)
{
return video_device[iminor(file->f_path.dentry->d_inode)];
}
EXPORT_SYMBOL(video_devdata);
/*
* Open a video device - FIXME: Obsoleted
*/
static int video_open(struct inode *inode, struct file *file)
{
unsigned int minor = iminor(inode);
int err = 0;
struct video_device *vfl;
const struct file_operations *old_fops;
if(minor>=VIDEO_NUM_DEVICES)
return -ENODEV;
mutex_lock(&videodev_lock);
vfl=video_device[minor];
if(vfl==NULL) {
mutex_unlock(&videodev_lock);
request_module("char-major-%d-%d", VIDEO_MAJOR, minor);
mutex_lock(&videodev_lock);
vfl=video_device[minor];
if (vfl==NULL) {
mutex_unlock(&videodev_lock);
return -ENODEV;
}
}
old_fops = file->f_op;
file->f_op = fops_get(vfl->fops);
if(file->f_op->open)
err = file->f_op->open(inode,file);
if (err) {
fops_put(file->f_op);
file->f_op = fops_get(old_fops);
}
fops_put(old_fops);
mutex_unlock(&videodev_lock);
return err;
}
/*
* helper function -- handles userspace copying for ioctl arguments
*/
#ifdef __OLD_VIDIOC_
static unsigned int
video_fix_command(unsigned int cmd)
{
switch (cmd) {
case VIDIOC_OVERLAY_OLD:
cmd = VIDIOC_OVERLAY;
break;
case VIDIOC_S_PARM_OLD:
cmd = VIDIOC_S_PARM;
break;
case VIDIOC_S_CTRL_OLD:
cmd = VIDIOC_S_CTRL;
break;
case VIDIOC_G_AUDIO_OLD:
cmd = VIDIOC_G_AUDIO;
break;
case VIDIOC_G_AUDOUT_OLD:
cmd = VIDIOC_G_AUDOUT;
break;
case VIDIOC_CROPCAP_OLD:
cmd = VIDIOC_CROPCAP;
break;
}
return cmd;
}
#endif
/*
* Obsolete usercopy function - Should be removed soon
*/
int
video_usercopy(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg,
int (*func)(struct inode *inode, struct file *file,
unsigned int cmd, void *arg))
{
char sbuf[128];
void *mbuf = NULL;
void *parg = NULL;
int err = -EINVAL;
int is_ext_ctrl;
size_t ctrls_size = 0;
void __user *user_ptr = NULL;
#ifdef __OLD_VIDIOC_
cmd = video_fix_command(cmd);
#endif
is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
cmd == VIDIOC_TRY_EXT_CTRLS);
/* Copy arguments into temp kernel buffer */
switch (_IOC_DIR(cmd)) {
case _IOC_NONE:
parg = NULL;
break;
case _IOC_READ:
case _IOC_WRITE:
case (_IOC_WRITE | _IOC_READ):
if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
parg = sbuf;
} else {
/* too big to allocate from stack */
mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
if (NULL == mbuf)
return -ENOMEM;
parg = mbuf;
}
err = -EFAULT;
if (_IOC_DIR(cmd) & _IOC_WRITE)
if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
goto out;
break;
}
if (is_ext_ctrl) {
struct v4l2_ext_controls *p = parg;
/* In case of an error, tell the caller that it wasn't
a specific control that caused it. */
p->error_idx = p->count;
user_ptr = (void __user *)p->controls;
if (p->count) {
ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
/* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
mbuf = kmalloc(ctrls_size, GFP_KERNEL);
err = -ENOMEM;
if (NULL == mbuf)
goto out_ext_ctrl;
err = -EFAULT;
if (copy_from_user(mbuf, user_ptr, ctrls_size))
goto out_ext_ctrl;
p->controls = mbuf;
}
}
/* call driver */
err = func(inode, file, cmd, parg);
if (err == -ENOIOCTLCMD)
err = -EINVAL;
if (is_ext_ctrl) {
struct v4l2_ext_controls *p = parg;
p->controls = (void *)user_ptr;
if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
err = -EFAULT;
goto out_ext_ctrl;
}
if (err < 0)
goto out;
out_ext_ctrl:
/* Copy results into user buffer */
switch (_IOC_DIR(cmd))
{
case _IOC_READ:
case (_IOC_WRITE | _IOC_READ):
if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
err = -EFAULT;
break;
}
out:
kfree(mbuf);
return err;
}
EXPORT_SYMBOL(video_usercopy);
/*
* open/release helper functions -- handle exclusive opens
* Should be removed soon
*/
int video_exclusive_open(struct inode *inode, struct file *file)
{
struct video_device *vfl = video_devdata(file);
int retval = 0;
mutex_lock(&vfl->lock);
if (vfl->users) {
retval = -EBUSY;
} else {
vfl->users++;
}
mutex_unlock(&vfl->lock);
return retval;
}
EXPORT_SYMBOL(video_exclusive_open);
int video_exclusive_release(struct inode *inode, struct file *file)
{
struct video_device *vfl = video_devdata(file);
vfl->users--;
return 0;
}
EXPORT_SYMBOL(video_exclusive_release);
static void dbgbuf(unsigned int cmd, struct video_device *vfd,
struct v4l2_buffer *p)
{
struct v4l2_timecode *tc=&p->timecode;
dbgarg (cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
"bytesused=%d, flags=0x%08d, "
"field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
(p->timestamp.tv_sec/3600),
(int)(p->timestamp.tv_sec/60)%60,
(int)(p->timestamp.tv_sec%60),
p->timestamp.tv_usec,
p->index,
prt_names(p->type, v4l2_type_names),
p->bytesused, p->flags,
p->field, p->sequence,
prt_names(p->memory, v4l2_memory_names),
p->m.userptr, p->length);
dbgarg2 ("timecode= %02d:%02d:%02d type=%d, "
"flags=0x%08d, frames=%d, userbits=0x%08x\n",
tc->hours,tc->minutes,tc->seconds,
tc->type, tc->flags, tc->frames, *(__u32 *) tc->userbits);
}
static inline void dbgrect(struct video_device *vfd, char *s,
struct v4l2_rect *r)
{
dbgarg2 ("%sRect start at %dx%d, size= %dx%d\n", s, r->left, r->top,
r->width, r->height);
};
static inline void v4l_print_pix_fmt (struct video_device *vfd,
struct v4l2_pix_format *fmt)
{
dbgarg2 ("width=%d, height=%d, format=%c%c%c%c, field=%s, "
"bytesperline=%d sizeimage=%d, colorspace=%d\n",
fmt->width,fmt->height,
(fmt->pixelformat & 0xff),
(fmt->pixelformat >> 8) & 0xff,
(fmt->pixelformat >> 16) & 0xff,
(fmt->pixelformat >> 24) & 0xff,
prt_names(fmt->field, v4l2_field_names),
fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
};
static int check_fmt (struct video_device *vfd, enum v4l2_buf_type type)
{
switch (type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (vfd->vidioc_try_fmt_cap)
return (0);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (vfd->vidioc_try_fmt_overlay)
return (0);
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
if (vfd->vidioc_try_fmt_vbi)
return (0);
break;
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
if (vfd->vidioc_try_fmt_vbi_output)
return (0);
break;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
if (vfd->vidioc_try_fmt_vbi_capture)
return (0);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (vfd->vidioc_try_fmt_video_output)
return (0);
break;
case V4L2_BUF_TYPE_VBI_OUTPUT:
if (vfd->vidioc_try_fmt_vbi_output)
return (0);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
if (vfd->vidioc_try_fmt_output_overlay)
return (0);
break;
case V4L2_BUF_TYPE_PRIVATE:
if (vfd->vidioc_try_fmt_type_private)
return (0);
break;
}
return (-EINVAL);
}
static int __video_do_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, void *arg)
{
struct video_device *vfd = video_devdata(file);
void *fh = file->private_data;
int ret = -EINVAL;
if ( (vfd->debug & V4L2_DEBUG_IOCTL) &&
!(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
v4l_print_ioctl(vfd->name, cmd);
}
#ifdef CONFIG_VIDEO_V4L1_COMPAT
/***********************************************************
Handles calls to the obsoleted V4L1 API
Due to the nature of VIDIOCGMBUF, each driver that supports
V4L1 should implement its own handler for this ioctl.
***********************************************************/
/* --- streaming capture ------------------------------------- */
if (cmd == VIDIOCGMBUF) {
struct video_mbuf *p=arg;
memset(p, 0, sizeof(*p));
if (!vfd->vidiocgmbuf)
return ret;
ret=vfd->vidiocgmbuf(file, fh, p);
if (!ret)
dbgarg (cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
p->size, p->frames,
(unsigned long)p->offsets);
return ret;
}
/********************************************************
All other V4L1 calls are handled by v4l1_compat module.
Those calls will be translated into V4L2 calls, and
__video_do_ioctl will be called again, with one or more
V4L2 ioctls.
********************************************************/
if (_IOC_TYPE(cmd)=='v')
return v4l_compat_translate_ioctl(inode,file,cmd,arg,
__video_do_ioctl);
#endif
switch(cmd) {
/* --- capabilities ------------------------------------------ */
case VIDIOC_QUERYCAP:
{
struct v4l2_capability *cap = (struct v4l2_capability*)arg;
memset(cap, 0, sizeof(*cap));
if (!vfd->vidioc_querycap)
break;
ret=vfd->vidioc_querycap(file, fh, cap);
if (!ret)
dbgarg (cmd, "driver=%s, card=%s, bus=%s, "
"version=0x%08x, "
"capabilities=0x%08x\n",
cap->driver,cap->card,cap->bus_info,
cap->version,
cap->capabilities);
break;
}
/* --- priority ------------------------------------------ */
case VIDIOC_G_PRIORITY:
{
enum v4l2_priority *p=arg;
if (!vfd->vidioc_g_priority)
break;
ret=vfd->vidioc_g_priority(file, fh, p);
if (!ret)
dbgarg(cmd, "priority is %d\n", *p);
break;
}
case VIDIOC_S_PRIORITY:
{
enum v4l2_priority *p=arg;
if (!vfd->vidioc_s_priority)
break;
dbgarg(cmd, "setting priority to %d\n", *p);
ret=vfd->vidioc_s_priority(file, fh, *p);
break;
}
/* --- capture ioctls ---------------------------------------- */
case VIDIOC_ENUM_FMT:
{
struct v4l2_fmtdesc *f = arg;
enum v4l2_buf_type type;
unsigned int index;
index = f->index;
type = f->type;
memset(f,0,sizeof(*f));
f->index = index;
f->type = type;
switch (type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (vfd->vidioc_enum_fmt_cap)
ret=vfd->vidioc_enum_fmt_cap(file, fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (vfd->vidioc_enum_fmt_overlay)
ret=vfd->vidioc_enum_fmt_overlay(file, fh, f);
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
if (vfd->vidioc_enum_fmt_vbi)
ret=vfd->vidioc_enum_fmt_vbi(file, fh, f);
break;
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
if (vfd->vidioc_enum_fmt_vbi_output)
ret=vfd->vidioc_enum_fmt_vbi_output(file,
fh, f);
break;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
if (vfd->vidioc_enum_fmt_vbi_capture)
ret=vfd->vidioc_enum_fmt_vbi_capture(file,
fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (vfd->vidioc_enum_fmt_video_output)
ret=vfd->vidioc_enum_fmt_video_output(file,
fh, f);
break;
case V4L2_BUF_TYPE_VBI_OUTPUT:
if (vfd->vidioc_enum_fmt_vbi_output)
ret=vfd->vidioc_enum_fmt_vbi_output(file,
fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
if (vfd->vidioc_enum_fmt_output_overlay)
ret=vfd->vidioc_enum_fmt_output_overlay(file, fh, f);
break;
case V4L2_BUF_TYPE_PRIVATE:
if (vfd->vidioc_enum_fmt_type_private)
ret=vfd->vidioc_enum_fmt_type_private(file,
fh, f);
break;
}
if (!ret)
dbgarg (cmd, "index=%d, type=%d, flags=%d, "
"pixelformat=%c%c%c%c, description='%s'\n",
f->index, f->type, f->flags,
(f->pixelformat & 0xff),
(f->pixelformat >> 8) & 0xff,
(f->pixelformat >> 16) & 0xff,
(f->pixelformat >> 24) & 0xff,
f->description);
break;
}
case VIDIOC_G_FMT:
{
struct v4l2_format *f = (struct v4l2_format *)arg;
enum v4l2_buf_type type=f->type;
memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
f->type=type;
/* FIXME: Should be one dump per type */
dbgarg (cmd, "type=%s\n", prt_names(type,
v4l2_type_names));
switch (type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (vfd->vidioc_g_fmt_cap)
ret=vfd->vidioc_g_fmt_cap(file, fh, f);
if (!ret)
v4l_print_pix_fmt(vfd,&f->fmt.pix);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (vfd->vidioc_g_fmt_overlay)
ret=vfd->vidioc_g_fmt_overlay(file, fh, f);
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
if (vfd->vidioc_g_fmt_vbi)
ret=vfd->vidioc_g_fmt_vbi(file, fh, f);
break;
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
if (vfd->vidioc_g_fmt_vbi_output)
ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
break;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
if (vfd->vidioc_g_fmt_vbi_capture)
ret=vfd->vidioc_g_fmt_vbi_capture(file, fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (vfd->vidioc_g_fmt_video_output)
ret=vfd->vidioc_g_fmt_video_output(file,
fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
if (vfd->vidioc_g_fmt_output_overlay)
ret=vfd->vidioc_g_fmt_output_overlay(file, fh, f);
break;
case V4L2_BUF_TYPE_VBI_OUTPUT:
if (vfd->vidioc_g_fmt_vbi_output)
ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
break;
case V4L2_BUF_TYPE_PRIVATE:
if (vfd->vidioc_g_fmt_type_private)
ret=vfd->vidioc_g_fmt_type_private(file,
fh, f);
break;
}
break;
}
case VIDIOC_S_FMT:
{
struct v4l2_format *f = (struct v4l2_format *)arg;
/* FIXME: Should be one dump per type */
dbgarg (cmd, "type=%s\n", prt_names(f->type,
v4l2_type_names));
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
v4l_print_pix_fmt(vfd,&f->fmt.pix);
if (vfd->vidioc_s_fmt_cap)
ret=vfd->vidioc_s_fmt_cap(file, fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (vfd->vidioc_s_fmt_overlay)
ret=vfd->vidioc_s_fmt_overlay(file, fh, f);
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
if (vfd->vidioc_s_fmt_vbi)
ret=vfd->vidioc_s_fmt_vbi(file, fh, f);
break;
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
if (vfd->vidioc_s_fmt_vbi_output)
ret=vfd->vidioc_s_fmt_vbi_output(file, fh, f);
break;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
if (vfd->vidioc_s_fmt_vbi_capture)
ret=vfd->vidioc_s_fmt_vbi_capture(file, fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (vfd->vidioc_s_fmt_video_output)
ret=vfd->vidioc_s_fmt_video_output(file,
fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
if (vfd->vidioc_s_fmt_output_overlay)
ret=vfd->vidioc_s_fmt_output_overlay(file, fh, f);
break;
case V4L2_BUF_TYPE_VBI_OUTPUT:
if (vfd->vidioc_s_fmt_vbi_output)
ret=vfd->vidioc_s_fmt_vbi_output(file,
fh, f);
break;
case V4L2_BUF_TYPE_PRIVATE:
if (vfd->vidioc_s_fmt_type_private)
ret=vfd->vidioc_s_fmt_type_private(file,
fh, f);
break;
}
break;
}
case VIDIOC_TRY_FMT:
{
struct v4l2_format *f = (struct v4l2_format *)arg;
/* FIXME: Should be one dump per type */
dbgarg (cmd, "type=%s\n", prt_names(f->type,
v4l2_type_names));
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (vfd->vidioc_try_fmt_cap)
ret=vfd->vidioc_try_fmt_cap(file, fh, f);
if (!ret)
v4l_print_pix_fmt(vfd,&f->fmt.pix);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (vfd->vidioc_try_fmt_overlay)
ret=vfd->vidioc_try_fmt_overlay(file, fh, f);
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
if (vfd->vidioc_try_fmt_vbi)
ret=vfd->vidioc_try_fmt_vbi(file, fh, f);
break;
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
if (vfd->vidioc_try_fmt_vbi_output)
ret=vfd->vidioc_try_fmt_vbi_output(file,
fh, f);
break;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
if (vfd->vidioc_try_fmt_vbi_capture)
ret=vfd->vidioc_try_fmt_vbi_capture(file,
fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (vfd->vidioc_try_fmt_video_output)
ret=vfd->vidioc_try_fmt_video_output(file,
fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
if (vfd->vidioc_try_fmt_output_overlay)
ret=vfd->vidioc_try_fmt_output_overlay(file, fh, f);
break;
case V4L2_BUF_TYPE_VBI_OUTPUT:
if (vfd->vidioc_try_fmt_vbi_output)
ret=vfd->vidioc_try_fmt_vbi_output(file,
fh, f);
break;
case V4L2_BUF_TYPE_PRIVATE:
if (vfd->vidioc_try_fmt_type_private)
ret=vfd->vidioc_try_fmt_type_private(file,
fh, f);
break;
}
break;
}
/* FIXME: Those buf reqs could be handled here,
with some changes on videobuf to allow its header to be included at
videodev2.h or being merged at videodev2.
*/
case VIDIOC_REQBUFS:
{
struct v4l2_requestbuffers *p=arg;
if (!vfd->vidioc_reqbufs)
break;
ret = check_fmt (vfd, p->type);
if (ret)
break;
ret=vfd->vidioc_reqbufs(file, fh, p);
dbgarg (cmd, "count=%d, type=%s, memory=%s\n",
p->count,
prt_names(p->type, v4l2_type_names),
prt_names(p->memory, v4l2_memory_names));
break;
}
case VIDIOC_QUERYBUF:
{
struct v4l2_buffer *p=arg;
if (!vfd->vidioc_querybuf)
break;
ret = check_fmt (vfd, p->type);
if (ret)
break;
ret=vfd->vidioc_querybuf(file, fh, p);
if (!ret)
dbgbuf(cmd,vfd,p);
break;
}
case VIDIOC_QBUF:
{
struct v4l2_buffer *p=arg;
if (!vfd->vidioc_qbuf)
break;
ret = check_fmt (vfd, p->type);
if (ret)
break;
ret=vfd->vidioc_qbuf(file, fh, p);
if (!ret)
dbgbuf(cmd,vfd,p);
break;
}
case VIDIOC_DQBUF:
{
struct v4l2_buffer *p=arg;
if (!vfd->vidioc_dqbuf)
break;
ret = check_fmt (vfd, p->type);
if (ret)
break;
ret=vfd->vidioc_dqbuf(file, fh, p);
if (!ret)
dbgbuf(cmd,vfd,p);
break;
}
case VIDIOC_OVERLAY:
{
int *i = arg;
if (!vfd->vidioc_overlay)
break;
dbgarg (cmd, "value=%d\n",*i);
ret=vfd->vidioc_overlay(file, fh, *i);
break;
}
case VIDIOC_G_FBUF:
{
struct v4l2_framebuffer *p=arg;
if (!vfd->vidioc_g_fbuf)
break;
ret=vfd->vidioc_g_fbuf(file, fh, arg);
if (!ret) {
dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
p->capability,p->flags,
(unsigned long)p->base);
v4l_print_pix_fmt (vfd, &p->fmt);
}
break;
}
case VIDIOC_S_FBUF:
{
struct v4l2_framebuffer *p=arg;
if (!vfd->vidioc_s_fbuf)
break;
dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
p->capability,p->flags,(unsigned long)p->base);
v4l_print_pix_fmt (vfd, &p->fmt);
ret=vfd->vidioc_s_fbuf(file, fh, arg);
break;
}
case VIDIOC_STREAMON:
{
enum v4l2_buf_type i = *(int *)arg;
if (!vfd->vidioc_streamon)
break;
dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
ret=vfd->vidioc_streamon(file, fh,i);
break;
}
case VIDIOC_STREAMOFF:
{
enum v4l2_buf_type i = *(int *)arg;
if (!vfd->vidioc_streamoff)
break;
dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
ret=vfd->vidioc_streamoff(file, fh, i);
break;
}
/* ---------- tv norms ---------- */
case VIDIOC_ENUMSTD:
{
struct v4l2_standard *p = arg;
v4l2_std_id id = vfd->tvnorms,curr_id=0;
unsigned int index = p->index,i;
if (index<0) {
ret=-EINVAL;
break;
}
/* Return norm array on a canonical way */
for (i=0;i<= index && id; i++) {
if ( (id & V4L2_STD_PAL) == V4L2_STD_PAL) {
curr_id = V4L2_STD_PAL;
} else if ( (id & V4L2_STD_PAL_BG) == V4L2_STD_PAL_BG) {
curr_id = V4L2_STD_PAL_BG;
} else if ( (id & V4L2_STD_PAL_DK) == V4L2_STD_PAL_DK) {
curr_id = V4L2_STD_PAL_DK;
} else if ( (id & V4L2_STD_PAL_B) == V4L2_STD_PAL_B) {
curr_id = V4L2_STD_PAL_B;
} else if ( (id & V4L2_STD_PAL_B1) == V4L2_STD_PAL_B1) {
curr_id = V4L2_STD_PAL_B1;
} else if ( (id & V4L2_STD_PAL_G) == V4L2_STD_PAL_G) {
curr_id = V4L2_STD_PAL_G;
} else if ( (id & V4L2_STD_PAL_H) == V4L2_STD_PAL_H) {
curr_id = V4L2_STD_PAL_H;
} else if ( (id & V4L2_STD_PAL_I) == V4L2_STD_PAL_I) {
curr_id = V4L2_STD_PAL_I;
} else if ( (id & V4L2_STD_PAL_D) == V4L2_STD_PAL_D) {
curr_id = V4L2_STD_PAL_D;
} else if ( (id & V4L2_STD_PAL_D1) == V4L2_STD_PAL_D1) {
curr_id = V4L2_STD_PAL_D1;
} else if ( (id & V4L2_STD_PAL_K) == V4L2_STD_PAL_K) {
curr_id = V4L2_STD_PAL_K;
} else if ( (id & V4L2_STD_PAL_M) == V4L2_STD_PAL_M) {
curr_id = V4L2_STD_PAL_M;
} else if ( (id & V4L2_STD_PAL_N) == V4L2_STD_PAL_N) {
curr_id = V4L2_STD_PAL_N;
} else if ( (id & V4L2_STD_PAL_Nc) == V4L2_STD_PAL_Nc) {
curr_id = V4L2_STD_PAL_Nc;
} else if ( (id & V4L2_STD_PAL_60) == V4L2_STD_PAL_60) {
curr_id = V4L2_STD_PAL_60;
} else if ( (id & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
curr_id = V4L2_STD_NTSC;
} else if ( (id & V4L2_STD_NTSC_M) == V4L2_STD_NTSC_M) {
curr_id = V4L2_STD_NTSC_M;
} else if ( (id & V4L2_STD_NTSC_M_JP) == V4L2_STD_NTSC_M_JP) {
curr_id = V4L2_STD_NTSC_M_JP;
} else if ( (id & V4L2_STD_NTSC_443) == V4L2_STD_NTSC_443) {
curr_id = V4L2_STD_NTSC_443;
} else if ( (id & V4L2_STD_NTSC_M_KR) == V4L2_STD_NTSC_M_KR) {
curr_id = V4L2_STD_NTSC_M_KR;
} else if ( (id & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
curr_id = V4L2_STD_SECAM;
} else if ( (id & V4L2_STD_SECAM_DK) == V4L2_STD_SECAM_DK) {
curr_id = V4L2_STD_SECAM_DK;
} else if ( (id & V4L2_STD_SECAM_B) == V4L2_STD_SECAM_B) {
curr_id = V4L2_STD_SECAM_B;
} else if ( (id & V4L2_STD_SECAM_D) == V4L2_STD_SECAM_D) {
curr_id = V4L2_STD_SECAM_D;
} else if ( (id & V4L2_STD_SECAM_G) == V4L2_STD_SECAM_G) {
curr_id = V4L2_STD_SECAM_G;
} else if ( (id & V4L2_STD_SECAM_H) == V4L2_STD_SECAM_H) {
curr_id = V4L2_STD_SECAM_H;
} else if ( (id & V4L2_STD_SECAM_K) == V4L2_STD_SECAM_K) {
curr_id = V4L2_STD_SECAM_K;
} else if ( (id & V4L2_STD_SECAM_K1) == V4L2_STD_SECAM_K1) {
curr_id = V4L2_STD_SECAM_K1;
} else if ( (id & V4L2_STD_SECAM_L) == V4L2_STD_SECAM_L) {
curr_id = V4L2_STD_SECAM_L;
} else if ( (id & V4L2_STD_SECAM_LC) == V4L2_STD_SECAM_LC) {
curr_id = V4L2_STD_SECAM_LC;
} else {
break;
}
id &= ~curr_id;
}
if (i<=index)
return -EINVAL;
v4l2_video_std_construct(p, curr_id,v4l2_norm_to_name(curr_id));
p->index = index;
dbgarg (cmd, "index=%d, id=%Ld, name=%s, fps=%d/%d, "
"framelines=%d\n", p->index,
(unsigned long long)p->id, p->name,
p->frameperiod.numerator,
p->frameperiod.denominator,
p->framelines);
ret=0;
break;
}
case VIDIOC_G_STD:
{
v4l2_std_id *id = arg;
*id = vfd->current_norm;
dbgarg (cmd, "value=%08Lx\n", (long long unsigned) *id);
ret=0;
break;
}
case VIDIOC_S_STD:
{
v4l2_std_id *id = arg,norm;
dbgarg (cmd, "value=%08Lx\n", (long long unsigned) *id);
norm = (*id) & vfd->tvnorms;
if ( vfd->tvnorms && !norm) /* Check if std is supported */
break;
/* Calls the specific handler */
if (vfd->vidioc_s_std)
ret=vfd->vidioc_s_std(file, fh, &norm);
else
ret=-EINVAL;
/* Updates standard information */
if (ret>=0)
vfd->current_norm=norm;
break;
}
case VIDIOC_QUERYSTD:
{
v4l2_std_id *p=arg;
if (!vfd->vidioc_querystd)
break;
ret=vfd->vidioc_querystd(file, fh, arg);
if (!ret)
dbgarg (cmd, "detected std=%08Lx\n",
(unsigned long long)*p);
break;
}
/* ------ input switching ---------- */
/* FIXME: Inputs can be handled inside videodev2 */
case VIDIOC_ENUMINPUT:
{
struct v4l2_input *p=arg;
int i=p->index;
if (!vfd->vidioc_enum_input)
break;
memset(p, 0, sizeof(*p));
p->index=i;
ret=vfd->vidioc_enum_input(file, fh, p);
if (!ret)
dbgarg (cmd, "index=%d, name=%s, type=%d, "
"audioset=%d, "
"tuner=%d, std=%08Lx, status=%d\n",
p->index,p->name,p->type,p->audioset,
p->tuner,
(unsigned long long)p->std,
p->status);
break;
}
case VIDIOC_G_INPUT:
{
unsigned int *i = arg;
if (!vfd->vidioc_g_input)
break;
ret=vfd->vidioc_g_input(file, fh, i);
if (!ret)
dbgarg (cmd, "value=%d\n",*i);
break;
}
case VIDIOC_S_INPUT:
{
unsigned int *i = arg;
if (!vfd->vidioc_s_input)
break;
dbgarg (cmd, "value=%d\n",*i);
ret=vfd->vidioc_s_input(file, fh, *i);
break;
}
/* ------ output switching ---------- */
case VIDIOC_G_OUTPUT:
{
unsigned int *i = arg;
if (!vfd->vidioc_g_output)
break;
ret=vfd->vidioc_g_output(file, fh, i);
if (!ret)
dbgarg (cmd, "value=%d\n",*i);
break;
}
case VIDIOC_S_OUTPUT:
{
unsigned int *i = arg;
if (!vfd->vidioc_s_output)
break;
dbgarg (cmd, "value=%d\n",*i);
ret=vfd->vidioc_s_output(file, fh, *i);
break;
}
/* --- controls ---------------------------------------------- */
case VIDIOC_QUERYCTRL:
{
struct v4l2_queryctrl *p=arg;
if (!vfd->vidioc_queryctrl)
break;
ret=vfd->vidioc_queryctrl(file, fh, p);
if (!ret)
dbgarg (cmd, "id=%d, type=%d, name=%s, "
"min/max=%d/%d,"
" step=%d, default=%d, flags=0x%08x\n",
p->id,p->type,p->name,p->minimum,
p->maximum,p->step,p->default_value,
p->flags);
break;
}
case VIDIOC_G_CTRL:
{
struct v4l2_control *p = arg;
if (!vfd->vidioc_g_ctrl)
break;
dbgarg(cmd, "Enum for index=%d\n", p->id);
ret=vfd->vidioc_g_ctrl(file, fh, p);
if (!ret)
dbgarg2 ( "id=%d, value=%d\n", p->id, p->value);
break;
}
case VIDIOC_S_CTRL:
{
struct v4l2_control *p = arg;
if (!vfd->vidioc_s_ctrl)
break;
dbgarg (cmd, "id=%d, value=%d\n", p->id, p->value);
ret=vfd->vidioc_s_ctrl(file, fh, p);
break;
}
case VIDIOC_G_EXT_CTRLS:
{
struct v4l2_ext_controls *p = arg;
if (vfd->vidioc_g_ext_ctrls) {
dbgarg(cmd, "count=%d\n", p->count);
ret=vfd->vidioc_g_ext_ctrls(file, fh, p);
}
break;
}
case VIDIOC_S_EXT_CTRLS:
{
struct v4l2_ext_controls *p = arg;
if (vfd->vidioc_s_ext_ctrls) {
dbgarg(cmd, "count=%d\n", p->count);
ret=vfd->vidioc_s_ext_ctrls(file, fh, p);
}
break;
}
case VIDIOC_TRY_EXT_CTRLS:
{
struct v4l2_ext_controls *p = arg;
if (vfd->vidioc_try_ext_ctrls) {
dbgarg(cmd, "count=%d\n", p->count);
ret=vfd->vidioc_try_ext_ctrls(file, fh, p);
}
break;
}
case VIDIOC_QUERYMENU:
{
struct v4l2_querymenu *p=arg;
if (!vfd->vidioc_querymenu)
break;
ret=vfd->vidioc_querymenu(file, fh, p);
if (!ret)
dbgarg (cmd, "id=%d, index=%d, name=%s\n",
p->id,p->index,p->name);
break;
}
/* --- audio ---------------------------------------------- */
case VIDIOC_ENUMAUDIO:
{
struct v4l2_audio *p=arg;
if (!vfd->vidioc_enumaudio)
break;
dbgarg(cmd, "Enum for index=%d\n", p->index);
ret=vfd->vidioc_enumaudio(file, fh, p);
if (!ret)
dbgarg2("index=%d, name=%s, capability=%d, "
"mode=%d\n",p->index,p->name,
p->capability, p->mode);
break;
}
case VIDIOC_G_AUDIO:
{
struct v4l2_audio *p=arg;
__u32 index=p->index;
if (!vfd->vidioc_g_audio)
break;
memset(p,0,sizeof(*p));
p->index=index;
dbgarg(cmd, "Get for index=%d\n", p->index);
ret=vfd->vidioc_g_audio(file, fh, p);
if (!ret)
dbgarg2("index=%d, name=%s, capability=%d, "
"mode=%d\n",p->index,
p->name,p->capability, p->mode);
break;
}
case VIDIOC_S_AUDIO:
{
struct v4l2_audio *p=arg;
if (!vfd->vidioc_s_audio)
break;
dbgarg(cmd, "index=%d, name=%s, capability=%d, "
"mode=%d\n", p->index, p->name,
p->capability, p->mode);
ret=vfd->vidioc_s_audio(file, fh, p);
break;
}
case VIDIOC_ENUMAUDOUT:
{
struct v4l2_audioout *p=arg;
if (!vfd->vidioc_enumaudout)
break;
dbgarg(cmd, "Enum for index=%d\n", p->index);
ret=vfd->vidioc_enumaudout(file, fh, p);
if (!ret)
dbgarg2("index=%d, name=%s, capability=%d, "
"mode=%d\n", p->index, p->name,
p->capability,p->mode);
break;
}
case VIDIOC_G_AUDOUT:
{
struct v4l2_audioout *p=arg;
if (!vfd->vidioc_g_audout)
break;
dbgarg(cmd, "Enum for index=%d\n", p->index);
ret=vfd->vidioc_g_audout(file, fh, p);
if (!ret)
dbgarg2("index=%d, name=%s, capability=%d, "
"mode=%d\n", p->index, p->name,
p->capability,p->mode);
break;
}
case VIDIOC_S_AUDOUT:
{
struct v4l2_audioout *p=arg;
if (!vfd->vidioc_s_audout)
break;
dbgarg(cmd, "index=%d, name=%s, capability=%d, "
"mode=%d\n", p->index, p->name,
p->capability,p->mode);
ret=vfd->vidioc_s_audout(file, fh, p);
break;
}
case VIDIOC_G_MODULATOR:
{
struct v4l2_modulator *p=arg;
if (!vfd->vidioc_g_modulator)
break;
ret=vfd->vidioc_g_modulator(file, fh, p);
if (!ret)
dbgarg(cmd, "index=%d, name=%s, "
"capability=%d, rangelow=%d,"
" rangehigh=%d, txsubchans=%d\n",
p->index, p->name,p->capability,
p->rangelow, p->rangehigh,
p->txsubchans);
break;
}
case VIDIOC_S_MODULATOR:
{
struct v4l2_modulator *p=arg;
if (!vfd->vidioc_s_modulator)
break;
dbgarg(cmd, "index=%d, name=%s, capability=%d, "
"rangelow=%d, rangehigh=%d, txsubchans=%d\n",
p->index, p->name,p->capability,p->rangelow,
p->rangehigh,p->txsubchans);
ret=vfd->vidioc_s_modulator(file, fh, p);
break;
}
case VIDIOC_G_CROP:
{
struct v4l2_crop *p=arg;
if (!vfd->vidioc_g_crop)
break;
ret=vfd->vidioc_g_crop(file, fh, p);
if (!ret) {
dbgarg(cmd, "type=%d\n", p->type);
dbgrect(vfd, "", &p->c);
}
break;
}
case VIDIOC_S_CROP:
{
struct v4l2_crop *p=arg;
if (!vfd->vidioc_s_crop)
break;
dbgarg(cmd, "type=%d\n", p->type);
dbgrect(vfd, "", &p->c);
ret=vfd->vidioc_s_crop(file, fh, p);
break;
}
case VIDIOC_CROPCAP:
{
struct v4l2_cropcap *p=arg;
/*FIXME: Should also show v4l2_fract pixelaspect */
if (!vfd->vidioc_cropcap)
break;
dbgarg(cmd, "type=%d\n", p->type);
dbgrect(vfd, "bounds ", &p->bounds);
dbgrect(vfd, "defrect ", &p->defrect);
ret=vfd->vidioc_cropcap(file, fh, p);
break;
}
case VIDIOC_G_JPEGCOMP:
{
struct v4l2_jpegcompression *p=arg;
if (!vfd->vidioc_g_jpegcomp)
break;
ret=vfd->vidioc_g_jpegcomp(file, fh, p);
if (!ret)
dbgarg (cmd, "quality=%d, APPn=%d, "
"APP_len=%d, COM_len=%d, "
"jpeg_markers=%d\n",
p->quality,p->APPn,p->APP_len,
p->COM_len,p->jpeg_markers);
break;
}
case VIDIOC_S_JPEGCOMP:
{
struct v4l2_jpegcompression *p=arg;
if (!vfd->vidioc_g_jpegcomp)
break;
dbgarg (cmd, "quality=%d, APPn=%d, APP_len=%d, "
"COM_len=%d, jpeg_markers=%d\n",
p->quality,p->APPn,p->APP_len,
p->COM_len,p->jpeg_markers);
ret=vfd->vidioc_s_jpegcomp(file, fh, p);
break;
}
case VIDIOC_G_ENC_INDEX:
{
struct v4l2_enc_idx *p=arg;
if (!vfd->vidioc_g_enc_index)
break;
ret=vfd->vidioc_g_enc_index(file, fh, p);
if (!ret)
dbgarg (cmd, "entries=%d, entries_cap=%d\n",
p->entries,p->entries_cap);
break;
}
case VIDIOC_ENCODER_CMD:
{
struct v4l2_encoder_cmd *p=arg;
if (!vfd->vidioc_encoder_cmd)
break;
ret=vfd->vidioc_encoder_cmd(file, fh, p);
if (!ret)
dbgarg (cmd, "cmd=%d, flags=%d\n",
p->cmd,p->flags);
break;
}
case VIDIOC_TRY_ENCODER_CMD:
{
struct v4l2_encoder_cmd *p=arg;
if (!vfd->vidioc_try_encoder_cmd)
break;
ret=vfd->vidioc_try_encoder_cmd(file, fh, p);
if (!ret)
dbgarg (cmd, "cmd=%d, flags=%d\n",
p->cmd,p->flags);
break;
}
case VIDIOC_G_PARM:
{
struct v4l2_streamparm *p=arg;
__u32 type=p->type;
memset(p,0,sizeof(*p));
p->type=type;
if (vfd->vidioc_g_parm) {
ret=vfd->vidioc_g_parm(file, fh, p);
} else {
struct v4l2_standard s;
if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
v4l2_video_std_construct(&s, vfd->current_norm,
v4l2_norm_to_name(vfd->current_norm));
p->parm.capture.timeperframe = s.frameperiod;
ret=0;
}
dbgarg (cmd, "type=%d\n", p->type);
break;
}
case VIDIOC_S_PARM:
{
struct v4l2_streamparm *p=arg;
if (!vfd->vidioc_s_parm)
break;
dbgarg (cmd, "type=%d\n", p->type);
ret=vfd->vidioc_s_parm(file, fh, p);
break;
}
case VIDIOC_G_TUNER:
{
struct v4l2_tuner *p=arg;
__u32 index=p->index;
if (!vfd->vidioc_g_tuner)
break;
memset(p,0,sizeof(*p));
p->index=index;
ret=vfd->vidioc_g_tuner(file, fh, p);
if (!ret)
dbgarg (cmd, "index=%d, name=%s, type=%d, "
"capability=%d, rangelow=%d, "
"rangehigh=%d, signal=%d, afc=%d, "
"rxsubchans=%d, audmode=%d\n",
p->index, p->name, p->type,
p->capability, p->rangelow,
p->rangehigh, p->rxsubchans,
p->audmode, p->signal, p->afc);
break;
}
case VIDIOC_S_TUNER:
{
struct v4l2_tuner *p=arg;
if (!vfd->vidioc_s_tuner)
break;
dbgarg (cmd, "index=%d, name=%s, type=%d, "
"capability=%d, rangelow=%d, rangehigh=%d, "
"signal=%d, afc=%d, rxsubchans=%d, "
"audmode=%d\n",p->index, p->name, p->type,
p->capability, p->rangelow,p->rangehigh,
p->rxsubchans, p->audmode, p->signal,
p->afc);
ret=vfd->vidioc_s_tuner(file, fh, p);
break;
}
case VIDIOC_G_FREQUENCY:
{
struct v4l2_frequency *p=arg;
if (!vfd->vidioc_g_frequency)
break;
memset(p,0,sizeof(*p));
ret=vfd->vidioc_g_frequency(file, fh, p);
if (!ret)
dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
p->tuner,p->type,p->frequency);
break;
}
case VIDIOC_S_FREQUENCY:
{
struct v4l2_frequency *p=arg;
if (!vfd->vidioc_s_frequency)
break;
dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
p->tuner,p->type,p->frequency);
ret=vfd->vidioc_s_frequency(file, fh, p);
break;
}
case VIDIOC_G_SLICED_VBI_CAP:
{
struct v4l2_sliced_vbi_cap *p=arg;
if (!vfd->vidioc_g_sliced_vbi_cap)
break;
ret=vfd->vidioc_g_sliced_vbi_cap(file, fh, p);
if (!ret)
dbgarg (cmd, "service_set=%d\n", p->service_set);
break;
}
case VIDIOC_LOG_STATUS:
{
if (!vfd->vidioc_log_status)
break;
ret=vfd->vidioc_log_status(file, fh);
break;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
case VIDIOC_DBG_G_REGISTER:
{
struct v4l2_register *p=arg;
if (!capable(CAP_SYS_ADMIN))
ret=-EPERM;
else if (vfd->vidioc_g_register)
ret=vfd->vidioc_g_register(file, fh, p);
break;
}
case VIDIOC_DBG_S_REGISTER:
{
struct v4l2_register *p=arg;
if (!capable(CAP_SYS_ADMIN))
ret=-EPERM;
else if (vfd->vidioc_s_register)
ret=vfd->vidioc_s_register(file, fh, p);
break;
}
#endif
case VIDIOC_G_CHIP_IDENT:
{
struct v4l2_chip_ident *p=arg;
if (!vfd->vidioc_g_chip_ident)
break;
ret=vfd->vidioc_g_chip_ident(file, fh, p);
if (!ret)
dbgarg (cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
break;
}
} /* switch */
if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
if (ret<0) {
printk ("%s: err:\n", vfd->name);
v4l_print_ioctl(vfd->name, cmd);
}
}
return ret;
}
int video_ioctl2 (struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
char sbuf[128];
void *mbuf = NULL;
void *parg = NULL;
int err = -EINVAL;
int is_ext_ctrl;
size_t ctrls_size = 0;
void __user *user_ptr = NULL;
#ifdef __OLD_VIDIOC_
cmd = video_fix_command(cmd);
#endif
is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
cmd == VIDIOC_TRY_EXT_CTRLS);
/* Copy arguments into temp kernel buffer */
switch (_IOC_DIR(cmd)) {
case _IOC_NONE:
parg = NULL;
break;
case _IOC_READ:
case _IOC_WRITE:
case (_IOC_WRITE | _IOC_READ):
if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
parg = sbuf;
} else {
/* too big to allocate from stack */
mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
if (NULL == mbuf)
return -ENOMEM;
parg = mbuf;
}
err = -EFAULT;
if (_IOC_DIR(cmd) & _IOC_WRITE)
if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
goto out;
break;
}
if (is_ext_ctrl) {
struct v4l2_ext_controls *p = parg;
/* In case of an error, tell the caller that it wasn't
a specific control that caused it. */
p->error_idx = p->count;
user_ptr = (void __user *)p->controls;
if (p->count) {
ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
/* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
mbuf = kmalloc(ctrls_size, GFP_KERNEL);
err = -ENOMEM;
if (NULL == mbuf)
goto out_ext_ctrl;
err = -EFAULT;
if (copy_from_user(mbuf, user_ptr, ctrls_size))
goto out_ext_ctrl;
p->controls = mbuf;
}
}
/* Handles IOCTL */
err = __video_do_ioctl(inode, file, cmd, parg);
if (err == -ENOIOCTLCMD)
err = -EINVAL;
if (is_ext_ctrl) {
struct v4l2_ext_controls *p = parg;
p->controls = (void *)user_ptr;
if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
err = -EFAULT;
goto out_ext_ctrl;
}
if (err < 0)
goto out;
out_ext_ctrl:
/* Copy results into user buffer */
switch (_IOC_DIR(cmd))
{
case _IOC_READ:
case (_IOC_WRITE | _IOC_READ):
if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
err = -EFAULT;
break;
}
out:
kfree(mbuf);
return err;
}
EXPORT_SYMBOL(video_ioctl2);
static const struct file_operations video_fops;
/**
* video_register_device - register video4linux devices
* @vfd: video device structure we want to register
* @type: type of device to register
* @nr: which device number (0 == /dev/video0, 1 == /dev/video1, ...
* -1 == first free)
*
* The registration code assigns minor numbers based on the type
* requested. -ENFILE is returned in all the device slots for this
* category are full. If not then the minor field is set and the
* driver initialize function is called (if non %NULL).
*
* Zero is returned on success.
*
* Valid types are
*
* %VFL_TYPE_GRABBER - A frame grabber
*
* %VFL_TYPE_VTX - A teletext device
*
* %VFL_TYPE_VBI - Vertical blank data (undecoded)
*
* %VFL_TYPE_RADIO - A radio card
*/
int video_register_device(struct video_device *vfd, int type, int nr)
{
int i=0;
int base;
int end;
int ret;
char *name_base;
switch(type)
{
case VFL_TYPE_GRABBER:
base=MINOR_VFL_TYPE_GRABBER_MIN;
end=MINOR_VFL_TYPE_GRABBER_MAX+1;
name_base = "video";
break;
case VFL_TYPE_VTX:
base=MINOR_VFL_TYPE_VTX_MIN;
end=MINOR_VFL_TYPE_VTX_MAX+1;
name_base = "vtx";
break;
case VFL_TYPE_VBI:
base=MINOR_VFL_TYPE_VBI_MIN;
end=MINOR_VFL_TYPE_VBI_MAX+1;
name_base = "vbi";
break;
case VFL_TYPE_RADIO:
base=MINOR_VFL_TYPE_RADIO_MIN;
end=MINOR_VFL_TYPE_RADIO_MAX+1;
name_base = "radio";
break;
default:
printk(KERN_ERR "%s called with unknown type: %d\n",
__FUNCTION__, type);
return -1;
}
/* pick a minor number */
mutex_lock(&videodev_lock);
if (nr >= 0 && nr < end-base) {
/* use the one the driver asked for */
i = base+nr;
if (NULL != video_device[i]) {
mutex_unlock(&videodev_lock);
return -ENFILE;
}
} else {
/* use first free */
for(i=base;i<end;i++)
if (NULL == video_device[i])
break;
if (i == end) {
mutex_unlock(&videodev_lock);
return -ENFILE;
}
}
video_device[i]=vfd;
vfd->minor=i;
mutex_unlock(&videodev_lock);
mutex_init(&vfd->lock);
/* sysfs class */
memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
if (vfd->dev)
vfd->class_dev.parent = vfd->dev;
vfd->class_dev.class = &video_class;
vfd->class_dev.devt = MKDEV(VIDEO_MAJOR, vfd->minor);
sprintf(vfd->class_dev.bus_id, "%s%d", name_base, i - base);
ret = device_register(&vfd->class_dev);
if (ret < 0) {
printk(KERN_ERR "%s: device_register failed\n",
__FUNCTION__);
goto fail_minor;
}
#if 1
/* needed until all drivers are fixed */
if (!vfd->release)
printk(KERN_WARNING "videodev: \"%s\" has no release callback. "
"Please fix your driver for proper sysfs support, see "
"http://lwn.net/Articles/36850/\n", vfd->name);
#endif
return 0;
fail_minor:
mutex_lock(&videodev_lock);
video_device[vfd->minor] = NULL;
vfd->minor = -1;
mutex_unlock(&videodev_lock);
return ret;
}
EXPORT_SYMBOL(video_register_device);
/**
* video_unregister_device - unregister a video4linux device
* @vfd: the device to unregister
*
* This unregisters the passed device and deassigns the minor
* number. Future open calls will be met with errors.
*/
void video_unregister_device(struct video_device *vfd)
{
mutex_lock(&videodev_lock);
if(video_device[vfd->minor]!=vfd)
panic("videodev: bad unregister");
video_device[vfd->minor]=NULL;
device_unregister(&vfd->class_dev);
mutex_unlock(&videodev_lock);
}
EXPORT_SYMBOL(video_unregister_device);
/*
* Video fs operations
*/
static const struct file_operations video_fops=
{
.owner = THIS_MODULE,
.llseek = no_llseek,
.open = video_open,
};
/*
* Initialise video for linux
*/
static int __init videodev_init(void)
{
int ret;
printk(KERN_INFO "Linux video capture interface: v2.00\n");
if (register_chrdev(VIDEO_MAJOR, VIDEO_NAME, &video_fops)) {
printk(KERN_WARNING "video_dev: unable to get major %d\n", VIDEO_MAJOR);
return -EIO;
}
ret = class_register(&video_class);
if (ret < 0) {
unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
printk(KERN_WARNING "video_dev: class_register failed\n");
return -EIO;
}
return 0;
}
static void __exit videodev_exit(void)
{
class_unregister(&video_class);
unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
}
module_init(videodev_init)
module_exit(videodev_exit)
MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@infradead.org>");
MODULE_DESCRIPTION("Device registrar for Video4Linux drivers v2");
MODULE_LICENSE("GPL");
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
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