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linux-kernel-test/drivers/media/video/videodev.c
Mauro Carvalho Chehab 401998fa96 V4L/DVB (4065): Several improvements at videodev.c 
Videodev now is capable of better handling V4L2 api, by
processing V4L2 ioctls and using callbacks to the driver.
The drivers should be migrated to the newer way and the older
one will be obsoleted soon.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2006-06-25 02:05:04 -03:00

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36 KiB
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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/sched.h>
#include <linux/smp_lock.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 <linux/devfs_fs_kernel.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>
#define VIDEO_NUM_DEVICES 256
#define VIDEO_NAME "video4linux"
/*
* sysfs stuff
*/
static ssize_t show_name(struct class_device *cd, 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);
}
static CLASS_DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
struct video_device *video_device_alloc(void)
{
struct video_device *vfd;
vfd = kzalloc(sizeof(*vfd),GFP_KERNEL);
return vfd;
}
void video_device_release(struct video_device *vfd)
{
kfree(vfd);
}
static void video_release(struct class_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 class video_class = {
.name = VIDEO_NAME,
.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_dentry->d_inode)];
}
/*
* 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;
#ifdef __OLD_VIDIOC_
cmd = video_fix_command(cmd);
#endif
/* 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;
}
/* call driver */
err = func(inode, file, cmd, parg);
if (err == -ENOIOCTLCMD)
err = -EINVAL;
if (err < 0)
goto out;
/* 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;
}
/*
* 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;
}
int video_exclusive_release(struct inode *inode, struct file *file)
{
struct video_device *vfl = video_devdata(file);
vfl->users--;
return 0;
}
static char *v4l2_memory_names[] = {
[V4L2_MEMORY_MMAP] = "mmap",
[V4L2_MEMORY_USERPTR] = "userptr",
[V4L2_MEMORY_OVERLAY] = "overlay",
};
/* FIXME: Those stuff are replicated also on v4l2-common.c */
static char *v4l2_type_names_FIXME[] = {
[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_OUTPUT] = "sliced-vbi-out",
[V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-capture",
[V4L2_BUF_TYPE_PRIVATE] = "private",
};
static char *v4l2_field_names_FIXME[] = {
[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",
};
#define prt_names(a,arr) (((a)>=0)&&((a)<ARRAY_SIZE(arr)))?arr[a]:"unknown"
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\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_FIXME),
p->bytesused,p->flags,
p->field,p->sequence,
prt_names(p->memory,v4l2_memory_names),
p->m.userptr);
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=0x%08x, field=%s, "
"bytesperline=%d sizeimage=%d, colorspace=%d\n",
fmt->width,fmt->height,fmt->pixelformat,
prt_names(fmt->field,v4l2_field_names_FIXME),
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_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);
}
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_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, "
"description=%s,"
" pixelformat=0x%8x\n",
f->index, f->type, f->flags,
f->description,
f->pixelformat);
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_FIXME));
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_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_FIXME));
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_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_FIXME));
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_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_FIXME),
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_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_OVERLAY:
{
int *i = arg;
if (!vfd->vidioc_overlay)
break;
dbgarg (cmd, "value=%d\n",*i);
ret=vfd->vidioc_overlay(file, fh, *i);
break;
}
#ifdef HAVE_V4L1
/* --- streaming capture ------------------------------------- */
case VIDIOCGMBUF:
{
struct video_mbuf *p=arg;
memset(&p,0,sizeof(p));
if (!vfd->vidiocgmbuf)
break;
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);
break;
}
#endif
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_FIXME));
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_FIXME));
ret=vfd->vidioc_streamoff(file, fh, i);
break;
}
/* ---------- tv norms ---------- */
case VIDIOC_ENUMSTD:
{
struct v4l2_standard *p = arg;
unsigned int index = p->index;
if (!vfd->tvnormsize) {
printk (KERN_WARNING "%s: no TV norms defined!\n",
vfd->name);
break;
}
if (index<=0 || index >= vfd->tvnormsize) {
ret=-EINVAL;
break;
}
v4l2_video_std_construct(p, vfd->tvnorms[p->index].id,
vfd->tvnorms[p->index].name);
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=%Lu\n", (long long unsigned) *id);
ret=0;
break;
}
case VIDIOC_S_STD:
{
v4l2_std_id *id = arg;
unsigned int i;
if (!vfd->tvnormsize) {
printk (KERN_WARNING "%s: no TV norms defined!\n",
vfd->name);
break;
}
dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
/* First search for exact match */
for (i = 0; i < vfd->tvnormsize; i++)
if (*id == vfd->tvnorms[i].id)
break;
/* Then for a generic video std that contains desired std */
if (i == vfd->tvnormsize)
for (i = 0; i < vfd->tvnormsize; i++)
if (*id & vfd->tvnorms[i].id)
break;
if (i == vfd->tvnormsize) {
break;
}
/* Calls the specific handler */
if (vfd->vidioc_s_std)
ret=vfd->vidioc_s_std(file, fh, i);
else
ret=-EINVAL;
/* Updates standard information */
if (!ret)
vfd->current_norm=*id;
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=%Lu\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=%Ld, 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_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;
if (!vfd->vidioc_g_audio)
break;
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_MPEGCOMP:
{
struct v4l2_mpeg_compression *p=arg;
/*FIXME: Several fields not shown */
if (!vfd->vidioc_g_mpegcomp)
break;
ret=vfd->vidioc_g_mpegcomp(file, fh, p);
if (!ret)
dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d,"
" ts_pid_video=%d, ts_pid_pcr=%d, "
"ps_size=%d, au_sample_rate=%d, "
"au_pesid=%c, vi_frame_rate=%d, "
"vi_frames_per_gop=%d, "
"vi_bframes_count=%d, vi_pesid=%c\n",
p->ts_pid_pmt,p->ts_pid_audio,
p->ts_pid_video,p->ts_pid_pcr,
p->ps_size, p->au_sample_rate,
p->au_pesid, p->vi_frame_rate,
p->vi_frames_per_gop,
p->vi_bframes_count, p->vi_pesid);
break;
}
case VIDIOC_S_MPEGCOMP:
{
struct v4l2_mpeg_compression *p=arg;
/*FIXME: Several fields not shown */
if (!vfd->vidioc_s_mpegcomp)
break;
dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d, "
"ts_pid_video=%d, ts_pid_pcr=%d, ps_size=%d, "
"au_sample_rate=%d, au_pesid=%c, "
"vi_frame_rate=%d, vi_frames_per_gop=%d, "
"vi_bframes_count=%d, vi_pesid=%c\n",
p->ts_pid_pmt,p->ts_pid_audio, p->ts_pid_video,
p->ts_pid_pcr, p->ps_size, p->au_sample_rate,
p->au_pesid, p->vi_frame_rate,
p->vi_frames_per_gop, p->vi_bframes_count,
p->vi_pesid);
ret=vfd->vidioc_s_mpegcomp(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_PARM:
{
struct v4l2_streamparm *p=arg;
if (!vfd->vidioc_g_parm)
break;
ret=vfd->vidioc_g_parm(file, fh, p);
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;
if (!vfd->vidioc_g_tuner)
break;
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;
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;
}
/* --- Others --------------------------------------------- */
default:
ret=v4l_compat_translate_ioctl(inode,file,cmd,arg,__video_do_ioctl);
}
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;
#ifdef __OLD_VIDIOC_
cmd = video_fix_command(cmd);
#endif
/* 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;
}
/* Handles IOCTL */
err = __video_do_ioctl(inode, file, cmd, parg);
if (err == -ENOIOCTLCMD)
err = -EINVAL;
if (err < 0)
goto out;
/* 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;
}
static 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;
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:
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);
sprintf(vfd->devfs_name, "v4l/%s%d", name_base, i - base);
devfs_mk_cdev(MKDEV(VIDEO_MAJOR, vfd->minor),
S_IFCHR | S_IRUSR | S_IWUSR, vfd->devfs_name);
mutex_init(&vfd->lock);
/* sysfs class */
memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
if (vfd->dev)
vfd->class_dev.dev = vfd->dev;
vfd->class_dev.class = &video_class;
vfd->class_dev.devt = MKDEV(VIDEO_MAJOR, vfd->minor);
strlcpy(vfd->class_dev.class_id, vfd->devfs_name + 4, BUS_ID_SIZE);
class_device_register(&vfd->class_dev);
class_device_create_file(&vfd->class_dev,
&class_device_attr_name);
#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;
}
/**
* 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");
devfs_remove(vfd->devfs_name);
video_device[vfd->minor]=NULL;
class_device_unregister(&vfd->class_dev);
mutex_unlock(&videodev_lock);
}
/*
* Video fs operations
*/
static 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)
EXPORT_SYMBOL(video_register_device);
EXPORT_SYMBOL(video_unregister_device);
EXPORT_SYMBOL(video_devdata);
EXPORT_SYMBOL(video_usercopy);
EXPORT_SYMBOL(video_exclusive_open);
EXPORT_SYMBOL(video_exclusive_release);
EXPORT_SYMBOL(video_ioctl2);
EXPORT_SYMBOL(video_device_alloc);
EXPORT_SYMBOL(video_device_release);
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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