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linux/drivers/media/video/v4l1-compat.c
Hans Verkuil 707ca1e30f V4L/DVB (12948): v4l1-compat: fix VIDIOC_G_STD handling 
The VIDIOC_G_STD ioctl may not be present in the case of radio receivers.
In that case G_STD will return an error. The v4l1-compat layer should not
attempt to propagate that error to the caller, instead it should be
ignored.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-09-19 00:15:25 -03:00

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/*
*
* Video for Linux Two
* Backward Compatibility Layer
*
* Support subroutines for providing V4L2 drivers with backward
* compatibility with applications using the old API.
*
* 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.
*
* Author: Bill Dirks <bill@thedirks.org>
* et al.
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/videodev.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/pgtable.h>
static unsigned int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable debug messages");
MODULE_AUTHOR("Bill Dirks");
MODULE_DESCRIPTION("v4l(1) compatibility layer for v4l2 drivers.");
MODULE_LICENSE("GPL");
#define dprintk(fmt, arg...) \
do { \
if (debug) \
printk(KERN_DEBUG "v4l1-compat: " fmt , ## arg);\
} while (0)
/*
* I O C T L T R A N S L A T I O N
*
* From here on down is the code for translating the numerous
* ioctl commands from the old API to the new API.
*/
static int
get_v4l_control(struct file *file,
int cid,
v4l2_kioctl drv)
{
struct v4l2_queryctrl qctrl2;
struct v4l2_control ctrl2;
int err;
qctrl2.id = cid;
err = drv(file, VIDIOC_QUERYCTRL, &qctrl2);
if (err < 0)
dprintk("VIDIOC_QUERYCTRL: %d\n", err);
if (err == 0 && !(qctrl2.flags & V4L2_CTRL_FLAG_DISABLED)) {
ctrl2.id = qctrl2.id;
err = drv(file, VIDIOC_G_CTRL, &ctrl2);
if (err < 0) {
dprintk("VIDIOC_G_CTRL: %d\n", err);
return 0;
}
return DIV_ROUND_CLOSEST((ctrl2.value-qctrl2.minimum) * 65535,
qctrl2.maximum - qctrl2.minimum);
}
return 0;
}
static int
set_v4l_control(struct file *file,
int cid,
int value,
v4l2_kioctl drv)
{
struct v4l2_queryctrl qctrl2;
struct v4l2_control ctrl2;
int err;
qctrl2.id = cid;
err = drv(file, VIDIOC_QUERYCTRL, &qctrl2);
if (err < 0)
dprintk("VIDIOC_QUERYCTRL: %d\n", err);
if (err == 0 &&
!(qctrl2.flags & V4L2_CTRL_FLAG_DISABLED) &&
!(qctrl2.flags & V4L2_CTRL_FLAG_GRABBED)) {
if (value < 0)
value = 0;
if (value > 65535)
value = 65535;
if (value && qctrl2.type == V4L2_CTRL_TYPE_BOOLEAN)
value = 65535;
ctrl2.id = qctrl2.id;
ctrl2.value =
(value * (qctrl2.maximum - qctrl2.minimum)
+ 32767)
/ 65535;
ctrl2.value += qctrl2.minimum;
err = drv(file, VIDIOC_S_CTRL, &ctrl2);
if (err < 0)
dprintk("VIDIOC_S_CTRL: %d\n", err);
}
return 0;
}
/* ----------------------------------------------------------------- */
static const unsigned int palette2pixelformat[] = {
[VIDEO_PALETTE_GREY] = V4L2_PIX_FMT_GREY,
[VIDEO_PALETTE_RGB555] = V4L2_PIX_FMT_RGB555,
[VIDEO_PALETTE_RGB565] = V4L2_PIX_FMT_RGB565,
[VIDEO_PALETTE_RGB24] = V4L2_PIX_FMT_BGR24,
[VIDEO_PALETTE_RGB32] = V4L2_PIX_FMT_BGR32,
/* yuv packed pixel */
[VIDEO_PALETTE_YUYV] = V4L2_PIX_FMT_YUYV,
[VIDEO_PALETTE_YUV422] = V4L2_PIX_FMT_YUYV,
[VIDEO_PALETTE_UYVY] = V4L2_PIX_FMT_UYVY,
/* yuv planar */
[VIDEO_PALETTE_YUV410P] = V4L2_PIX_FMT_YUV410,
[VIDEO_PALETTE_YUV420] = V4L2_PIX_FMT_YUV420,
[VIDEO_PALETTE_YUV420P] = V4L2_PIX_FMT_YUV420,
[VIDEO_PALETTE_YUV411P] = V4L2_PIX_FMT_YUV411P,
[VIDEO_PALETTE_YUV422P] = V4L2_PIX_FMT_YUV422P,
};
static unsigned int __pure
palette_to_pixelformat(unsigned int palette)
{
if (palette < ARRAY_SIZE(palette2pixelformat))
return palette2pixelformat[palette];
else
return 0;
}
static unsigned int __attribute_const__
pixelformat_to_palette(unsigned int pixelformat)
{
int palette = 0;
switch (pixelformat) {
case V4L2_PIX_FMT_GREY:
palette = VIDEO_PALETTE_GREY;
break;
case V4L2_PIX_FMT_RGB555:
palette = VIDEO_PALETTE_RGB555;
break;
case V4L2_PIX_FMT_RGB565:
palette = VIDEO_PALETTE_RGB565;
break;
case V4L2_PIX_FMT_BGR24:
palette = VIDEO_PALETTE_RGB24;
break;
case V4L2_PIX_FMT_BGR32:
palette = VIDEO_PALETTE_RGB32;
break;
/* yuv packed pixel */
case V4L2_PIX_FMT_YUYV:
palette = VIDEO_PALETTE_YUYV;
break;
case V4L2_PIX_FMT_UYVY:
palette = VIDEO_PALETTE_UYVY;
break;
/* yuv planar */
case V4L2_PIX_FMT_YUV410:
palette = VIDEO_PALETTE_YUV420;
break;
case V4L2_PIX_FMT_YUV420:
palette = VIDEO_PALETTE_YUV420;
break;
case V4L2_PIX_FMT_YUV411P:
palette = VIDEO_PALETTE_YUV411P;
break;
case V4L2_PIX_FMT_YUV422P:
palette = VIDEO_PALETTE_YUV422P;
break;
}
return palette;
}
/* ----------------------------------------------------------------- */
static int poll_one(struct file *file, struct poll_wqueues *pwq)
{
int retval = 1;
poll_table *table;
poll_initwait(pwq);
table = &pwq->pt;
for (;;) {
int mask;
mask = file->f_op->poll(file, table);
if (mask & POLLIN)
break;
table = NULL;
if (signal_pending(current)) {
retval = -ERESTARTSYS;
break;
}
poll_schedule(pwq, TASK_INTERRUPTIBLE);
}
poll_freewait(pwq);
return retval;
}
static int count_inputs(
struct file *file,
v4l2_kioctl drv)
{
struct v4l2_input input2;
int i;
for (i = 0;; i++) {
memset(&input2, 0, sizeof(input2));
input2.index = i;
if (0 != drv(file, VIDIOC_ENUMINPUT, &input2))
break;
}
return i;
}
static int check_size(
struct file *file,
v4l2_kioctl drv,
int *maxw,
int *maxh)
{
struct v4l2_fmtdesc desc2;
struct v4l2_format fmt2;
memset(&desc2, 0, sizeof(desc2));
memset(&fmt2, 0, sizeof(fmt2));
desc2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (0 != drv(file, VIDIOC_ENUM_FMT, &desc2))
goto done;
fmt2.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
fmt2.fmt.pix.width = 10000;
fmt2.fmt.pix.height = 10000;
fmt2.fmt.pix.pixelformat = desc2.pixelformat;
if (0 != drv(file, VIDIOC_TRY_FMT, &fmt2))
goto done;
*maxw = fmt2.fmt.pix.width;
*maxh = fmt2.fmt.pix.height;
done:
return 0;
}
/* ----------------------------------------------------------------- */
static noinline long v4l1_compat_get_capabilities(
struct video_capability *cap,
struct file *file,
v4l2_kioctl drv)
{
long err;
struct v4l2_framebuffer fbuf;
struct v4l2_capability *cap2;
cap2 = kzalloc(sizeof(*cap2), GFP_KERNEL);
if (!cap2) {
err = -ENOMEM;
return err;
}
memset(cap, 0, sizeof(*cap));
memset(&fbuf, 0, sizeof(fbuf));
err = drv(file, VIDIOC_QUERYCAP, cap2);
if (err < 0) {
dprintk("VIDIOCGCAP / VIDIOC_QUERYCAP: %ld\n", err);
goto done;
}
if (cap2->capabilities & V4L2_CAP_VIDEO_OVERLAY) {
err = drv(file, VIDIOC_G_FBUF, &fbuf);
if (err < 0) {
dprintk("VIDIOCGCAP / VIDIOC_G_FBUF: %ld\n", err);
memset(&fbuf, 0, sizeof(fbuf));
}
err = 0;
}
memcpy(cap->name, cap2->card,
min(sizeof(cap->name), sizeof(cap2->card)));
cap->name[sizeof(cap->name) - 1] = 0;
if (cap2->capabilities & V4L2_CAP_VIDEO_CAPTURE)
cap->type |= VID_TYPE_CAPTURE;
if (cap2->capabilities & V4L2_CAP_TUNER)
cap->type |= VID_TYPE_TUNER;
if (cap2->capabilities & V4L2_CAP_VBI_CAPTURE)
cap->type |= VID_TYPE_TELETEXT;
if (cap2->capabilities & V4L2_CAP_VIDEO_OVERLAY)
cap->type |= VID_TYPE_OVERLAY;
if (fbuf.capability & V4L2_FBUF_CAP_LIST_CLIPPING)
cap->type |= VID_TYPE_CLIPPING;
cap->channels = count_inputs(file, drv);
check_size(file, drv,
&cap->maxwidth, &cap->maxheight);
cap->audios = 0; /* FIXME */
cap->minwidth = 48; /* FIXME */
cap->minheight = 32; /* FIXME */
done:
kfree(cap2);
return err;
}
static noinline long v4l1_compat_get_frame_buffer(
struct video_buffer *buffer,
struct file *file,
v4l2_kioctl drv)
{
long err;
struct v4l2_framebuffer fbuf;
memset(buffer, 0, sizeof(*buffer));
memset(&fbuf, 0, sizeof(fbuf));
err = drv(file, VIDIOC_G_FBUF, &fbuf);
if (err < 0) {
dprintk("VIDIOCGFBUF / VIDIOC_G_FBUF: %ld\n", err);
goto done;
}
buffer->base = fbuf.base;
buffer->height = fbuf.fmt.height;
buffer->width = fbuf.fmt.width;
switch (fbuf.fmt.pixelformat) {
case V4L2_PIX_FMT_RGB332:
buffer->depth = 8;
break;
case V4L2_PIX_FMT_RGB555:
buffer->depth = 15;
break;
case V4L2_PIX_FMT_RGB565:
buffer->depth = 16;
break;
case V4L2_PIX_FMT_BGR24:
buffer->depth = 24;
break;
case V4L2_PIX_FMT_BGR32:
buffer->depth = 32;
break;
default:
buffer->depth = 0;
}
if (fbuf.fmt.bytesperline) {
buffer->bytesperline = fbuf.fmt.bytesperline;
if (!buffer->depth && buffer->width)
buffer->depth = ((fbuf.fmt.bytesperline<<3)
+ (buffer->width-1))
/ buffer->width;
} else {
buffer->bytesperline =
(buffer->width * buffer->depth + 7) & 7;
buffer->bytesperline >>= 3;
}
done:
return err;
}
static noinline long v4l1_compat_set_frame_buffer(
struct video_buffer *buffer,
struct file *file,
v4l2_kioctl drv)
{
long err;
struct v4l2_framebuffer fbuf;
memset(&fbuf, 0, sizeof(fbuf));
fbuf.base = buffer->base;
fbuf.fmt.height = buffer->height;
fbuf.fmt.width = buffer->width;
switch (buffer->depth) {
case 8:
fbuf.fmt.pixelformat = V4L2_PIX_FMT_RGB332;
break;
case 15:
fbuf.fmt.pixelformat = V4L2_PIX_FMT_RGB555;
break;
case 16:
fbuf.fmt.pixelformat = V4L2_PIX_FMT_RGB565;
break;
case 24:
fbuf.fmt.pixelformat = V4L2_PIX_FMT_BGR24;
break;
case 32:
fbuf.fmt.pixelformat = V4L2_PIX_FMT_BGR32;
break;
}
fbuf.fmt.bytesperline = buffer->bytesperline;
err = drv(file, VIDIOC_S_FBUF, &fbuf);
if (err < 0)
dprintk("VIDIOCSFBUF / VIDIOC_S_FBUF: %ld\n", err);
return err;
}
static noinline long v4l1_compat_get_win_cap_dimensions(
struct video_window *win,
struct file *file,
v4l2_kioctl drv)
{
long err;
struct v4l2_format *fmt;
fmt = kzalloc(sizeof(*fmt), GFP_KERNEL);
if (!fmt) {
err = -ENOMEM;
return err;
}
memset(win, 0, sizeof(*win));
fmt->type = V4L2_BUF_TYPE_VIDEO_OVERLAY;
err = drv(file, VIDIOC_G_FMT, fmt);
if (err < 0)
dprintk("VIDIOCGWIN / VIDIOC_G_WIN: %ld\n", err);
if (err == 0) {
win->x = fmt->fmt.win.w.left;
win->y = fmt->fmt.win.w.top;
win->width = fmt->fmt.win.w.width;
win->height = fmt->fmt.win.w.height;
win->chromakey = fmt->fmt.win.chromakey;
win->clips = NULL;
win->clipcount = 0;
goto done;
}
fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
err = drv(file, VIDIOC_G_FMT, fmt);
if (err < 0) {
dprintk("VIDIOCGWIN / VIDIOC_G_FMT: %ld\n", err);
goto done;
}
win->x = 0;
win->y = 0;
win->width = fmt->fmt.pix.width;
win->height = fmt->fmt.pix.height;
win->chromakey = 0;
win->clips = NULL;
win->clipcount = 0;
done:
kfree(fmt);
return err;
}
static noinline long v4l1_compat_set_win_cap_dimensions(
struct video_window *win,
struct file *file,
v4l2_kioctl drv)
{
long err, err1, err2;
struct v4l2_format *fmt;
fmt = kzalloc(sizeof(*fmt), GFP_KERNEL);
if (!fmt) {
err = -ENOMEM;
return err;
}
fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
drv(file, VIDIOC_STREAMOFF, &fmt->type);
err1 = drv(file, VIDIOC_G_FMT, fmt);
if (err1 < 0)
dprintk("VIDIOCSWIN / VIDIOC_G_FMT: %ld\n", err1);
if (err1 == 0) {
fmt->fmt.pix.width = win->width;
fmt->fmt.pix.height = win->height;
fmt->fmt.pix.field = V4L2_FIELD_ANY;
fmt->fmt.pix.bytesperline = 0;
err = drv(file, VIDIOC_S_FMT, fmt);
if (err < 0)
dprintk("VIDIOCSWIN / VIDIOC_S_FMT #1: %ld\n",
err);
win->width = fmt->fmt.pix.width;
win->height = fmt->fmt.pix.height;
}
memset(fmt, 0, sizeof(*fmt));
fmt->type = V4L2_BUF_TYPE_VIDEO_OVERLAY;
fmt->fmt.win.w.left = win->x;
fmt->fmt.win.w.top = win->y;
fmt->fmt.win.w.width = win->width;
fmt->fmt.win.w.height = win->height;
fmt->fmt.win.chromakey = win->chromakey;
fmt->fmt.win.clips = (void __user *)win->clips;
fmt->fmt.win.clipcount = win->clipcount;
err2 = drv(file, VIDIOC_S_FMT, fmt);
if (err2 < 0)
dprintk("VIDIOCSWIN / VIDIOC_S_FMT #2: %ld\n", err2);
if (err1 != 0 && err2 != 0)
err = err1;
else
err = 0;
kfree(fmt);
return err;
}
static noinline long v4l1_compat_turn_preview_on_off(
int *on,
struct file *file,
v4l2_kioctl drv)
{
long err;
enum v4l2_buf_type captype = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (0 == *on) {
/* dirty hack time. But v4l1 has no STREAMOFF
* equivalent in the API, and this one at
* least comes close ... */
drv(file, VIDIOC_STREAMOFF, &captype);
}
err = drv(file, VIDIOC_OVERLAY, on);
if (err < 0)
dprintk("VIDIOCCAPTURE / VIDIOC_PREVIEW: %ld\n", err);
return err;
}
static noinline long v4l1_compat_get_input_info(
struct video_channel *chan,
struct file *file,
v4l2_kioctl drv)
{
long err;
struct v4l2_input input2;
v4l2_std_id sid;
memset(&input2, 0, sizeof(input2));
input2.index = chan->channel;
err = drv(file, VIDIOC_ENUMINPUT, &input2);
if (err < 0) {
dprintk("VIDIOCGCHAN / VIDIOC_ENUMINPUT: "
"channel=%d err=%ld\n", chan->channel, err);
goto done;
}
chan->channel = input2.index;
memcpy(chan->name, input2.name,
min(sizeof(chan->name), sizeof(input2.name)));
chan->name[sizeof(chan->name) - 1] = 0;
chan->tuners = (input2.type == V4L2_INPUT_TYPE_TUNER) ? 1 : 0;
chan->flags = (chan->tuners) ? VIDEO_VC_TUNER : 0;
switch (input2.type) {
case V4L2_INPUT_TYPE_TUNER:
chan->type = VIDEO_TYPE_TV;
break;
default:
case V4L2_INPUT_TYPE_CAMERA:
chan->type = VIDEO_TYPE_CAMERA;
break;
}
chan->norm = 0;
/* Note: G_STD might not be present for radio receivers,
* so we should ignore any errors. */
if (drv(file, VIDIOC_G_STD, &sid) == 0) {
if (sid & V4L2_STD_PAL)
chan->norm = VIDEO_MODE_PAL;
if (sid & V4L2_STD_NTSC)
chan->norm = VIDEO_MODE_NTSC;
if (sid & V4L2_STD_SECAM)
chan->norm = VIDEO_MODE_SECAM;
if (sid == V4L2_STD_ALL)
chan->norm = VIDEO_MODE_AUTO;
}
done:
return err;
}
static noinline long v4l1_compat_set_input(
struct video_channel *chan,
struct file *file,
v4l2_kioctl drv)
{
long err;
v4l2_std_id sid = 0;
err = drv(file, VIDIOC_S_INPUT, &chan->channel);
if (err < 0)
dprintk("VIDIOCSCHAN / VIDIOC_S_INPUT: %ld\n", err);
switch (chan->norm) {
case VIDEO_MODE_PAL:
sid = V4L2_STD_PAL;
break;
case VIDEO_MODE_NTSC:
sid = V4L2_STD_NTSC;
break;
case VIDEO_MODE_SECAM:
sid = V4L2_STD_SECAM;
break;
case VIDEO_MODE_AUTO:
sid = V4L2_STD_ALL;
break;
}
if (0 != sid) {
err = drv(file, VIDIOC_S_STD, &sid);
if (err < 0)
dprintk("VIDIOCSCHAN / VIDIOC_S_STD: %ld\n", err);
}
return err;
}
static noinline long v4l1_compat_get_picture(
struct video_picture *pict,
struct file *file,
v4l2_kioctl drv)
{
long err;
struct v4l2_format *fmt;
fmt = kzalloc(sizeof(*fmt), GFP_KERNEL);
if (!fmt) {
err = -ENOMEM;
return err;
}
pict->brightness = get_v4l_control(file,
V4L2_CID_BRIGHTNESS, drv);
pict->hue = get_v4l_control(file,
V4L2_CID_HUE, drv);
pict->contrast = get_v4l_control(file,
V4L2_CID_CONTRAST, drv);
pict->colour = get_v4l_control(file,
V4L2_CID_SATURATION, drv);
pict->whiteness = get_v4l_control(file,
V4L2_CID_WHITENESS, drv);
fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
err = drv(file, VIDIOC_G_FMT, fmt);
if (err < 0) {
dprintk("VIDIOCGPICT / VIDIOC_G_FMT: %ld\n", err);
goto done;
}
pict->depth = ((fmt->fmt.pix.bytesperline << 3)
+ (fmt->fmt.pix.width - 1))
/ fmt->fmt.pix.width;
pict->palette = pixelformat_to_palette(
fmt->fmt.pix.pixelformat);
done:
kfree(fmt);
return err;
}
static noinline long v4l1_compat_set_picture(
struct video_picture *pict,
struct file *file,
v4l2_kioctl drv)
{
long err;
struct v4l2_framebuffer fbuf;
int mem_err = 0, ovl_err = 0;
struct v4l2_format *fmt;
fmt = kzalloc(sizeof(*fmt), GFP_KERNEL);
if (!fmt) {
err = -ENOMEM;
return err;
}
memset(&fbuf, 0, sizeof(fbuf));
set_v4l_control(file,
V4L2_CID_BRIGHTNESS, pict->brightness, drv);
set_v4l_control(file,
V4L2_CID_HUE, pict->hue, drv);
set_v4l_control(file,
V4L2_CID_CONTRAST, pict->contrast, drv);
set_v4l_control(file,
V4L2_CID_SATURATION, pict->colour, drv);
set_v4l_control(file,
V4L2_CID_WHITENESS, pict->whiteness, drv);
/*
* V4L1 uses this ioctl to set both memory capture and overlay
* pixel format, while V4L2 has two different ioctls for this.
* Some cards may not support one or the other, and may support
* different pixel formats for memory vs overlay.
*/
fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
err = drv(file, VIDIOC_G_FMT, fmt);
/* If VIDIOC_G_FMT failed, then the driver likely doesn't
support memory capture. Trying to set the memory capture
parameters would be pointless. */
if (err < 0) {
dprintk("VIDIOCSPICT / VIDIOC_G_FMT: %ld\n", err);
mem_err = -1000; /* didn't even try */
} else if (fmt->fmt.pix.pixelformat !=
palette_to_pixelformat(pict->palette)) {
fmt->fmt.pix.pixelformat = palette_to_pixelformat(
pict->palette);
mem_err = drv(file, VIDIOC_S_FMT, fmt);
if (mem_err < 0)
dprintk("VIDIOCSPICT / VIDIOC_S_FMT: %d\n",
mem_err);
}
err = drv(file, VIDIOC_G_FBUF, &fbuf);
/* If VIDIOC_G_FBUF failed, then the driver likely doesn't
support overlay. Trying to set the overlay parameters
would be quite pointless. */
if (err < 0) {
dprintk("VIDIOCSPICT / VIDIOC_G_FBUF: %ld\n", err);
ovl_err = -1000; /* didn't even try */
} else if (fbuf.fmt.pixelformat !=
palette_to_pixelformat(pict->palette)) {
fbuf.fmt.pixelformat = palette_to_pixelformat(
pict->palette);
ovl_err = drv(file, VIDIOC_S_FBUF, &fbuf);
if (ovl_err < 0)
dprintk("VIDIOCSPICT / VIDIOC_S_FBUF: %d\n",
ovl_err);
}
if (ovl_err < 0 && mem_err < 0) {
/* ioctl failed, couldn't set either parameter */
if (mem_err != -1000)
err = mem_err;
else if (ovl_err == -EPERM)
err = 0;
else
err = ovl_err;
} else
err = 0;
kfree(fmt);
return err;
}
static noinline long v4l1_compat_get_tuner(
struct video_tuner *tun,
struct file *file,
v4l2_kioctl drv)
{
long err;
int i;
struct v4l2_tuner tun2;
struct v4l2_standard std2;
v4l2_std_id sid;
memset(&tun2, 0, sizeof(tun2));
err = drv(file, VIDIOC_G_TUNER, &tun2);
if (err < 0) {
dprintk("VIDIOCGTUNER / VIDIOC_G_TUNER: %ld\n", err);
goto done;
}
memcpy(tun->name, tun2.name,
min(sizeof(tun->name), sizeof(tun2.name)));
tun->name[sizeof(tun->name) - 1] = 0;
tun->rangelow = tun2.rangelow;
tun->rangehigh = tun2.rangehigh;
tun->flags = 0;
tun->mode = VIDEO_MODE_AUTO;
for (i = 0; i < 64; i++) {
memset(&std2, 0, sizeof(std2));
std2.index = i;
if (0 != drv(file, VIDIOC_ENUMSTD, &std2))
break;
if (std2.id & V4L2_STD_PAL)
tun->flags |= VIDEO_TUNER_PAL;
if (std2.id & V4L2_STD_NTSC)
tun->flags |= VIDEO_TUNER_NTSC;
if (std2.id & V4L2_STD_SECAM)
tun->flags |= VIDEO_TUNER_SECAM;
}
/* Note: G_STD might not be present for radio receivers,
* so we should ignore any errors. */
if (drv(file, VIDIOC_G_STD, &sid) == 0) {
if (sid & V4L2_STD_PAL)
tun->mode = VIDEO_MODE_PAL;
if (sid & V4L2_STD_NTSC)
tun->mode = VIDEO_MODE_NTSC;
if (sid & V4L2_STD_SECAM)
tun->mode = VIDEO_MODE_SECAM;
}
if (tun2.capability & V4L2_TUNER_CAP_LOW)
tun->flags |= VIDEO_TUNER_LOW;
if (tun2.rxsubchans & V4L2_TUNER_SUB_STEREO)
tun->flags |= VIDEO_TUNER_STEREO_ON;
tun->signal = tun2.signal;
done:
return err;
}
static noinline long v4l1_compat_select_tuner(
struct video_tuner *tun,
struct file *file,
v4l2_kioctl drv)
{
long err;
struct v4l2_tuner t;/*84 bytes on x86_64*/
memset(&t, 0, sizeof(t));
t.index = tun->tuner;
err = drv(file, VIDIOC_S_TUNER, &t);
if (err < 0)
dprintk("VIDIOCSTUNER / VIDIOC_S_TUNER: %ld\n", err);
return err;
}
static noinline long v4l1_compat_get_frequency(
unsigned long *freq,
struct file *file,
v4l2_kioctl drv)
{
long err;
struct v4l2_frequency freq2;
memset(&freq2, 0, sizeof(freq2));
freq2.tuner = 0;
err = drv(file, VIDIOC_G_FREQUENCY, &freq2);
if (err < 0)
dprintk("VIDIOCGFREQ / VIDIOC_G_FREQUENCY: %ld\n", err);
if (0 == err)
*freq = freq2.frequency;
return err;
}
static noinline long v4l1_compat_set_frequency(
unsigned long *freq,
struct file *file,
v4l2_kioctl drv)
{
long err;
struct v4l2_frequency freq2;
memset(&freq2, 0, sizeof(freq2));
drv(file, VIDIOC_G_FREQUENCY, &freq2);
freq2.frequency = *freq;
err = drv(file, VIDIOC_S_FREQUENCY, &freq2);
if (err < 0)
dprintk("VIDIOCSFREQ / VIDIOC_S_FREQUENCY: %ld\n", err);
return err;
}
static noinline long v4l1_compat_get_audio(
struct video_audio *aud,
struct file *file,
v4l2_kioctl drv)
{
long err;
int i;
struct v4l2_queryctrl qctrl2;
struct v4l2_audio aud2;
struct v4l2_tuner tun2;
memset(&aud2, 0, sizeof(aud2));
err = drv(file, VIDIOC_G_AUDIO, &aud2);
if (err < 0) {
dprintk("VIDIOCGAUDIO / VIDIOC_G_AUDIO: %ld\n", err);
goto done;
}
memcpy(aud->name, aud2.name,
min(sizeof(aud->name), sizeof(aud2.name)));
aud->name[sizeof(aud->name) - 1] = 0;
aud->audio = aud2.index;
aud->flags = 0;
i = get_v4l_control(file, V4L2_CID_AUDIO_VOLUME, drv);
if (i >= 0) {
aud->volume = i;
aud->flags |= VIDEO_AUDIO_VOLUME;
}
i = get_v4l_control(file, V4L2_CID_AUDIO_BASS, drv);
if (i >= 0) {
aud->bass = i;
aud->flags |= VIDEO_AUDIO_BASS;
}
i = get_v4l_control(file, V4L2_CID_AUDIO_TREBLE, drv);
if (i >= 0) {
aud->treble = i;
aud->flags |= VIDEO_AUDIO_TREBLE;
}
i = get_v4l_control(file, V4L2_CID_AUDIO_BALANCE, drv);
if (i >= 0) {
aud->balance = i;
aud->flags |= VIDEO_AUDIO_BALANCE;
}
i = get_v4l_control(file, V4L2_CID_AUDIO_MUTE, drv);
if (i >= 0) {
if (i)
aud->flags |= VIDEO_AUDIO_MUTE;
aud->flags |= VIDEO_AUDIO_MUTABLE;
}
aud->step = 1;
qctrl2.id = V4L2_CID_AUDIO_VOLUME;
if (drv(file, VIDIOC_QUERYCTRL, &qctrl2) == 0 &&
!(qctrl2.flags & V4L2_CTRL_FLAG_DISABLED))
aud->step = qctrl2.step;
aud->mode = 0;
memset(&tun2, 0, sizeof(tun2));
err = drv(file, VIDIOC_G_TUNER, &tun2);
if (err < 0) {
dprintk("VIDIOCGAUDIO / VIDIOC_G_TUNER: %ld\n", err);
err = 0;
goto done;
}
if (tun2.rxsubchans & V4L2_TUNER_SUB_LANG2)
aud->mode = VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
else if (tun2.rxsubchans & V4L2_TUNER_SUB_STEREO)
aud->mode = VIDEO_SOUND_STEREO;
else if (tun2.rxsubchans & V4L2_TUNER_SUB_MONO)
aud->mode = VIDEO_SOUND_MONO;
done:
return err;
}
static noinline long v4l1_compat_set_audio(
struct video_audio *aud,
struct file *file,
v4l2_kioctl drv)
{
long err;
struct v4l2_audio aud2;
struct v4l2_tuner tun2;
memset(&aud2, 0, sizeof(aud2));
memset(&tun2, 0, sizeof(tun2));
aud2.index = aud->audio;
err = drv(file, VIDIOC_S_AUDIO, &aud2);
if (err < 0) {
dprintk("VIDIOCSAUDIO / VIDIOC_S_AUDIO: %ld\n", err);
goto done;
}
set_v4l_control(file, V4L2_CID_AUDIO_VOLUME,
aud->volume, drv);
set_v4l_control(file, V4L2_CID_AUDIO_BASS,
aud->bass, drv);
set_v4l_control(file, V4L2_CID_AUDIO_TREBLE,
aud->treble, drv);
set_v4l_control(file, V4L2_CID_AUDIO_BALANCE,
aud->balance, drv);
set_v4l_control(file, V4L2_CID_AUDIO_MUTE,
!!(aud->flags & VIDEO_AUDIO_MUTE), drv);
err = drv(file, VIDIOC_G_TUNER, &tun2);
if (err < 0)
dprintk("VIDIOCSAUDIO / VIDIOC_G_TUNER: %ld\n", err);
if (err == 0) {
switch (aud->mode) {
default:
case VIDEO_SOUND_MONO:
case VIDEO_SOUND_LANG1:
tun2.audmode = V4L2_TUNER_MODE_MONO;
break;
case VIDEO_SOUND_STEREO:
tun2.audmode = V4L2_TUNER_MODE_STEREO;
break;
case VIDEO_SOUND_LANG2:
tun2.audmode = V4L2_TUNER_MODE_LANG2;
break;
}
err = drv(file, VIDIOC_S_TUNER, &tun2);
if (err < 0)
dprintk("VIDIOCSAUDIO / VIDIOC_S_TUNER: %ld\n", err);
}
err = 0;
done:
return err;
}
static noinline long v4l1_compat_capture_frame(
struct video_mmap *mm,
struct file *file,
v4l2_kioctl drv)
{
long err;
enum v4l2_buf_type captype = V4L2_BUF_TYPE_VIDEO_CAPTURE;
struct v4l2_buffer buf;
struct v4l2_format *fmt;
fmt = kzalloc(sizeof(*fmt), GFP_KERNEL);
if (!fmt) {
err = -ENOMEM;
return err;
}
memset(&buf, 0, sizeof(buf));
fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
err = drv(file, VIDIOC_G_FMT, fmt);
if (err < 0) {
dprintk("VIDIOCMCAPTURE / VIDIOC_G_FMT: %ld\n", err);
goto done;
}
if (mm->width != fmt->fmt.pix.width ||
mm->height != fmt->fmt.pix.height ||
palette_to_pixelformat(mm->format) !=
fmt->fmt.pix.pixelformat) {
/* New capture format... */
fmt->fmt.pix.width = mm->width;
fmt->fmt.pix.height = mm->height;
fmt->fmt.pix.pixelformat =
palette_to_pixelformat(mm->format);
fmt->fmt.pix.field = V4L2_FIELD_ANY;
fmt->fmt.pix.bytesperline = 0;
err = drv(file, VIDIOC_S_FMT, fmt);
if (err < 0) {
dprintk("VIDIOCMCAPTURE / VIDIOC_S_FMT: %ld\n", err);
goto done;
}
}
buf.index = mm->frame;
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
err = drv(file, VIDIOC_QUERYBUF, &buf);
if (err < 0) {
dprintk("VIDIOCMCAPTURE / VIDIOC_QUERYBUF: %ld\n", err);
goto done;
}
err = drv(file, VIDIOC_QBUF, &buf);
if (err < 0) {
dprintk("VIDIOCMCAPTURE / VIDIOC_QBUF: %ld\n", err);
goto done;
}
err = drv(file, VIDIOC_STREAMON, &captype);
if (err < 0)
dprintk("VIDIOCMCAPTURE / VIDIOC_STREAMON: %ld\n", err);
done:
kfree(fmt);
return err;
}
static noinline long v4l1_compat_sync(
int *i,
struct file *file,
v4l2_kioctl drv)
{
long err;
enum v4l2_buf_type captype = V4L2_BUF_TYPE_VIDEO_CAPTURE;
struct v4l2_buffer buf;
struct poll_wqueues *pwq;
memset(&buf, 0, sizeof(buf));
buf.index = *i;
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
err = drv(file, VIDIOC_QUERYBUF, &buf);
if (err < 0) {
/* No such buffer */
dprintk("VIDIOCSYNC / VIDIOC_QUERYBUF: %ld\n", err);
goto done;
}
if (!(buf.flags & V4L2_BUF_FLAG_MAPPED)) {
/* Buffer is not mapped */
err = -EINVAL;
goto done;
}
/* make sure capture actually runs so we don't block forever */
err = drv(file, VIDIOC_STREAMON, &captype);
if (err < 0) {
dprintk("VIDIOCSYNC / VIDIOC_STREAMON: %ld\n", err);
goto done;
}
pwq = kmalloc(sizeof(*pwq), GFP_KERNEL);
/* Loop as long as the buffer is queued, but not done */
while ((buf.flags & (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE))
== V4L2_BUF_FLAG_QUEUED) {
err = poll_one(file, pwq);
if (err < 0 || /* error or sleep was interrupted */
err == 0) /* timeout? Shouldn't occur. */
break;
err = drv(file, VIDIOC_QUERYBUF, &buf);
if (err < 0)
dprintk("VIDIOCSYNC / VIDIOC_QUERYBUF: %ld\n", err);
}
kfree(pwq);
if (!(buf.flags & V4L2_BUF_FLAG_DONE)) /* not done */
goto done;
do {
err = drv(file, VIDIOC_DQBUF, &buf);
if (err < 0)
dprintk("VIDIOCSYNC / VIDIOC_DQBUF: %ld\n", err);
} while (err == 0 && buf.index != *i);
done:
return err;
}
static noinline long v4l1_compat_get_vbi_format(
struct vbi_format *fmt,
struct file *file,
v4l2_kioctl drv)
{
long err;
struct v4l2_format *fmt2;
fmt2 = kzalloc(sizeof(*fmt2), GFP_KERNEL);
if (!fmt2) {
err = -ENOMEM;
return err;
}
fmt2->type = V4L2_BUF_TYPE_VBI_CAPTURE;
err = drv(file, VIDIOC_G_FMT, fmt2);
if (err < 0) {
dprintk("VIDIOCGVBIFMT / VIDIOC_G_FMT: %ld\n", err);
goto done;
}
if (fmt2->fmt.vbi.sample_format != V4L2_PIX_FMT_GREY) {
err = -EINVAL;
goto done;
}
memset(fmt, 0, sizeof(*fmt));
fmt->samples_per_line = fmt2->fmt.vbi.samples_per_line;
fmt->sampling_rate = fmt2->fmt.vbi.sampling_rate;
fmt->sample_format = VIDEO_PALETTE_RAW;
fmt->start[0] = fmt2->fmt.vbi.start[0];
fmt->count[0] = fmt2->fmt.vbi.count[0];
fmt->start[1] = fmt2->fmt.vbi.start[1];
fmt->count[1] = fmt2->fmt.vbi.count[1];
fmt->flags = fmt2->fmt.vbi.flags & 0x03;
done:
kfree(fmt2);
return err;
}
static noinline long v4l1_compat_set_vbi_format(
struct vbi_format *fmt,
struct file *file,
v4l2_kioctl drv)
{
long err;
struct v4l2_format *fmt2 = NULL;
if (VIDEO_PALETTE_RAW != fmt->sample_format) {
err = -EINVAL;
return err;
}
fmt2 = kzalloc(sizeof(*fmt2), GFP_KERNEL);
if (!fmt2) {
err = -ENOMEM;
return err;
}
fmt2->type = V4L2_BUF_TYPE_VBI_CAPTURE;
fmt2->fmt.vbi.samples_per_line = fmt->samples_per_line;
fmt2->fmt.vbi.sampling_rate = fmt->sampling_rate;
fmt2->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
fmt2->fmt.vbi.start[0] = fmt->start[0];
fmt2->fmt.vbi.count[0] = fmt->count[0];
fmt2->fmt.vbi.start[1] = fmt->start[1];
fmt2->fmt.vbi.count[1] = fmt->count[1];
fmt2->fmt.vbi.flags = fmt->flags;
err = drv(file, VIDIOC_TRY_FMT, fmt2);
if (err < 0) {
dprintk("VIDIOCSVBIFMT / VIDIOC_TRY_FMT: %ld\n", err);
goto done;
}
if (fmt2->fmt.vbi.samples_per_line != fmt->samples_per_line ||
fmt2->fmt.vbi.sampling_rate != fmt->sampling_rate ||
fmt2->fmt.vbi.sample_format != V4L2_PIX_FMT_GREY ||
fmt2->fmt.vbi.start[0] != fmt->start[0] ||
fmt2->fmt.vbi.count[0] != fmt->count[0] ||
fmt2->fmt.vbi.start[1] != fmt->start[1] ||
fmt2->fmt.vbi.count[1] != fmt->count[1] ||
fmt2->fmt.vbi.flags != fmt->flags) {
err = -EINVAL;
goto done;
}
err = drv(file, VIDIOC_S_FMT, fmt2);
if (err < 0)
dprintk("VIDIOCSVBIFMT / VIDIOC_S_FMT: %ld\n", err);
done:
kfree(fmt2);
return err;
}
/*
* This function is exported.
*/
long
v4l_compat_translate_ioctl(struct file *file,
int cmd,
void *arg,
v4l2_kioctl drv)
{
long err;
switch (cmd) {
case VIDIOCGCAP: /* capability */
err = v4l1_compat_get_capabilities(arg, file, drv);
break;
case VIDIOCGFBUF: /* get frame buffer */
err = v4l1_compat_get_frame_buffer(arg, file, drv);
break;
case VIDIOCSFBUF: /* set frame buffer */
err = v4l1_compat_set_frame_buffer(arg, file, drv);
break;
case VIDIOCGWIN: /* get window or capture dimensions */
err = v4l1_compat_get_win_cap_dimensions(arg, file, drv);
break;
case VIDIOCSWIN: /* set window and/or capture dimensions */
err = v4l1_compat_set_win_cap_dimensions(arg, file, drv);
break;
case VIDIOCCAPTURE: /* turn on/off preview */
err = v4l1_compat_turn_preview_on_off(arg, file, drv);
break;
case VIDIOCGCHAN: /* get input information */
err = v4l1_compat_get_input_info(arg, file, drv);
break;
case VIDIOCSCHAN: /* set input */
err = v4l1_compat_set_input(arg, file, drv);
break;
case VIDIOCGPICT: /* get tone controls & partial capture format */
err = v4l1_compat_get_picture(arg, file, drv);
break;
case VIDIOCSPICT: /* set tone controls & partial capture format */
err = v4l1_compat_set_picture(arg, file, drv);
break;
case VIDIOCGTUNER: /* get tuner information */
err = v4l1_compat_get_tuner(arg, file, drv);
break;
case VIDIOCSTUNER: /* select a tuner input */
err = v4l1_compat_select_tuner(arg, file, drv);
break;
case VIDIOCGFREQ: /* get frequency */
err = v4l1_compat_get_frequency(arg, file, drv);
break;
case VIDIOCSFREQ: /* set frequency */
err = v4l1_compat_set_frequency(arg, file, drv);
break;
case VIDIOCGAUDIO: /* get audio properties/controls */
err = v4l1_compat_get_audio(arg, file, drv);
break;
case VIDIOCSAUDIO: /* set audio controls */
err = v4l1_compat_set_audio(arg, file, drv);
break;
case VIDIOCMCAPTURE: /* capture a frame */
err = v4l1_compat_capture_frame(arg, file, drv);
break;
case VIDIOCSYNC: /* wait for a frame */
err = v4l1_compat_sync(arg, file, drv);
break;
case VIDIOCGVBIFMT: /* query VBI data capture format */
err = v4l1_compat_get_vbi_format(arg, file, drv);
break;
case VIDIOCSVBIFMT:
err = v4l1_compat_set_vbi_format(arg, file, drv);
break;
default:
err = -ENOIOCTLCMD;
break;
}
return err;
}
EXPORT_SYMBOL(v4l_compat_translate_ioctl);
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
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