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stk11xx-v4l.c
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stk11xx-v4l.c
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/**
* @file stk11xx-v4l.c
* @author Nicolas VIVIEN
* @date 2006-10-23
* @version v2.2.x
*
* @brief Driver for Syntek USB video camera
*
* @note Copyright (C) Nicolas VIVIEN
*
* @par Licences
*
* 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
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* @par SubVersion
* $Date$
* $Revision$
* $Author$
* $HeadURL$
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/kref.h>
#include <linux/vmalloc.h>
#include <linux/mm.h>
#if defined(VIDIOCGCAP)
#include <linux/videodev.h>
#endif
#include <linux/usb.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include "stk11xx.h"
static struct v4l2_file_operations v4l_stk11xx_fops;
/**
* @var stk11xx_image_sizes
* List of all resolutions supported by the driver
*/
const struct stk11xx_coord stk11xx_image_sizes[STK11XX_NBR_SIZES] = {
{ 80, 60 },
{ 128, 96 },
{ 160, 120 },
{ 213, 160 },
{ 320, 240 },
{ 640, 480 },
{ 720, 576 },
{ 800, 600 },
{ 1024, 768 },
{ 1280, 1024 }
};
/**
* @var stk11xx_controls
* List of all V4Lv2 controls supported by the driver
* default_value field will be overridden at runtime
*/
static struct v4l2_queryctrl stk11xx_controls[] = {
{
.id = V4L2_CID_BRIGHTNESS,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Brightness",
.minimum = 0,
.maximum = 0xff00,
.step = 1,
.default_value = 0x7f00,
},
{
.id = V4L2_CID_WHITENESS,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Whiteness",
.minimum = 0,
.maximum = 0xff00,
.step = 1,
.default_value = 0x7f00,
},
{
.id = V4L2_CID_SATURATION,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Saturation",
.minimum = 0,
.maximum = 0xff00,
.step = 1,
.default_value = 0x7f00,
},
{
.id = V4L2_CID_CONTRAST,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Contrast",
.minimum = 0,
.maximum = 0xff00,
.step = 1,
.default_value = 0x7f00,
},
{
.id = V4L2_CID_HUE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Hue",
.minimum = 0,
.maximum = 0xff00,
.step = 1,
.default_value = 0x7f00,
},
{
.id = V4L2_CID_HFLIP,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Flip Horizontally",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 0, // will be actually set later
},
{
.id = V4L2_CID_VFLIP,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Flip Vertically",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 0, // will be actually set later
}
};
/**
* @param dev
* @param width Width of wished resolution
* @param height Height of wished resolution
*
* @returns 0 if all is OK
*
* @brief Select a video mode
*
* This function permits to check and select a video mode.
*/
int v4l_stk11xx_select_video_mode(struct usb_stk11xx *dev, int width, int height)
{
int i;
int find;
// Check width and height
// Notice : this test is usefull for the Kopete application !
// Driver can't build an image smaller than the minimal resolution !
if ((width < stk11xx_image_sizes[0].x)
|| (height < stk11xx_image_sizes[0].y)) {
width = stk11xx_image_sizes[0].x;
height = stk11xx_image_sizes[0].y;
}
// Driver can't build an image bigger than the maximal resolution !
switch (dev->webcam_type) {
case STK11XX_SXGA:
if ((width > stk11xx_image_sizes[STK11XX_1280x1024].x)
|| (height > stk11xx_image_sizes[STK11XX_1280x1024].y)) {
width = stk11xx_image_sizes[STK11XX_1280x1024].x;
height = stk11xx_image_sizes[STK11XX_1280x1024].y;
}
break;
case STK11XX_VGA:
if ((width > stk11xx_image_sizes[STK11XX_640x480].x)
|| (height > stk11xx_image_sizes[STK11XX_640x480].y)) {
width = stk11xx_image_sizes[STK11XX_640x480].x;
height = stk11xx_image_sizes[STK11XX_640x480].y;
}
break;
case STK11XX_PAL:
if (! (((width == 720) && (height==576))
|| ((width == 720) && (height==480))
|| ((width == 640) && (height==480)))) {
width = 640;
height = 480;
}
break;
default:
return -1;
}
// Seek the best resolution
switch (dev->webcam_type) {
case STK11XX_SXGA:
for (i=0, find=0; i<=STK11XX_1280x1024; i++) {
if (stk11xx_image_sizes[i].x <= width && stk11xx_image_sizes[i].y <= height)
find = i;
}
break;
case STK11XX_VGA:
for (i=0, find=0; i<=STK11XX_640x480; i++) {
if (stk11xx_image_sizes[i].x <= width && stk11xx_image_sizes[i].y <= height)
find = i;
}
break;
case STK11XX_PAL:
for (i=0, find=0; i<=STK11XX_720x576; i++) {
if (stk11xx_image_sizes[i].x <= width && stk11xx_image_sizes[i].y <= height)
find = i;
}
break;
default:
return -1;
}
// Save the new resolution
dev->resolution = find;
STK_DEBUG("Set mode %d [%dx%d]\n", dev->resolution,
stk11xx_image_sizes[dev->resolution].x, stk11xx_image_sizes[dev->resolution].y);
// Save the new size
dev->view.x = width;
dev->view.y = height;
// Calculate the frame size
if (dev->webcam_type == STK11XX_PAL) {
// Here, dev->resolution equals : 640x480 || 720x576
dev->image.x = stk11xx_image_sizes[dev->resolution].x;
dev->image.y = stk11xx_image_sizes[dev->resolution].y;
dev->frame_size = dev->image.x * dev->image.y;
}
else {
switch (dev->resolution) {
case STK11XX_80x60:
case STK11XX_128x96:
case STK11XX_160x120:
case STK11XX_213x160:
case STK11XX_320x240:
case STK11XX_640x480:
dev->image.x = stk11xx_image_sizes[STK11XX_640x480].x;
dev->image.y = stk11xx_image_sizes[STK11XX_640x480].y;
dev->frame_size = dev->image.x * dev->image.y;
break;
case STK11XX_720x576:
case STK11XX_800x600:
case STK11XX_1024x768:
case STK11XX_1280x1024:
dev->image.x = stk11xx_image_sizes[STK11XX_1280x1024].x;
dev->image.y = stk11xx_image_sizes[STK11XX_1280x1024].y;
dev->frame_size = dev->image.x * dev->image.y;
break;
}
}
// Calculate the image size
switch (dev->vsettings.palette) {
case STK11XX_PALETTE_RGB24:
case STK11XX_PALETTE_BGR24:
dev->view_size = 3 * dev->view.x * dev->view.y;
dev->image_size = 3 * dev->frame_size;
break;
case STK11XX_PALETTE_RGB32:
case STK11XX_PALETTE_BGR32:
dev->view_size = 3 * dev->view.x * dev->view.y;
dev->image_size = 4 * dev->frame_size;
break;
case STK11XX_PALETTE_UYVY:
case STK11XX_PALETTE_YUYV:
dev->view_size = 2 * dev->view.x * dev->view.y;
dev->image_size = 2 * dev->frame_size;
break;
}
return 0;
}
/**
* @param fp File pointer
*
* @returns 0 if all is OK
*
* @brief Open the video device
*
* This function permits to open a video device (/dev/videoX)
*/
static int v4l_stk11xx_open(struct file *fp)
{
int err;
struct usb_stk11xx *dev;
struct video_device *vdev;
vdev = video_devdata(fp);
dev = video_get_drvdata(video_devdata(fp));
if (dev == NULL) {
STK_ERROR("Device not initialized !!!\n");
BUG();
}
mutex_lock(&dev->modlock);
if (dev->vopen) {
STK_DEBUG("Device is busy, someone is using the device\n");
mutex_unlock(&dev->modlock);
return -EBUSY;
}
// Allocate memory
err = stk11xx_allocate_buffers(dev);
if (err < 0) {
STK_ERROR("Failed to allocate buffer memory !\n");
mutex_unlock(&dev->modlock);
return err;
}
// Reset buffers and parameters
stk11xx_reset_buffers(dev);
// Settings
dev->vsync = 0;
dev->v1st_cap = 5;
dev->error_status = 0;
dev->visoc_errors = 0;
dev->vframes_error = 0;
dev->vframes_dumped = 0;
dev->vsettings.hue = 0xffff;
dev->vsettings.whiteness = 0xffff;
dev->vsettings.depth = 24;
dev->vsettings.palette = STK11XX_PALETTE_BGR24;
// Select the resolution by default
v4l_stk11xx_select_video_mode(dev, 640, 480);
// Initialize the device
dev_stk11xx_init_camera(dev);
dev_stk11xx_camera_on(dev);
dev_stk11xx_reconf_camera(dev);
// Init Isoc and URB
err = usb_stk11xx_isoc_init(dev);
if (err) {
STK_ERROR("Failed to init ISOC stuff !\n");
usb_stk11xx_isoc_cleanup(dev);
stk11xx_free_buffers(dev);
mutex_unlock(&dev->modlock);
return err;
}
// Start the video stream
dev_stk11xx_start_stream(dev);
// Video settings
dev_stk11xx_camera_settings(dev);
// Register interface on power management
usb_autopm_get_interface(dev->interface);
dev->vopen++;
fp->private_data = vdev;
mutex_unlock(&dev->modlock);
return 0;
}
/**
* @param fp File pointer
*
* @returns 0 if all is OK
*
* @brief Release an opened file.
*
* This function permits to release an opened file with the 'open' method.
*/
static int v4l_stk11xx_release(struct file *fp)
{
struct usb_stk11xx *dev;
struct video_device *vdev;
vdev = video_devdata(fp);
dev = video_get_drvdata(video_devdata(fp));
if (dev->vopen == 0)
STK_ERROR("v4l_release called on closed device\n");
// Stop the video stream
dev_stk11xx_stop_stream(dev);
// ISOC and URB cleanup
usb_stk11xx_isoc_cleanup(dev);
// Free memory
stk11xx_free_buffers(dev);
// Switch off the camera
dev_stk11xx_camera_off(dev);
dev_stk11xx_camera_asleep(dev);
// Unregister interface on power management
usb_autopm_put_interface(dev->interface);
dev->vopen--;
return 0;
}
/**
* @param fp File pointer
*
* @retval buf Buffer in user space
* @retval count
* @retval f_pos
*
* @returns Count value
*
* @brief Read the video device
*
* This function is called by the application is reading the video device.
*/
static ssize_t v4l_stk11xx_read(struct file *fp, char __user *buf,
size_t count, loff_t *f_pos)
{
int noblock = fp->f_flags & O_NONBLOCK;
struct usb_stk11xx *dev;
struct video_device *vdev;
int bytes_to_read;
void *image_buffer_addr;
DECLARE_WAITQUEUE(wait, current);
vdev = video_devdata(fp);
dev = video_get_drvdata(video_devdata(fp));
STK_STREAM("Read vdev=0x%p, buf=0x%p, count=%zd\n", vdev, buf, count);
if (dev == NULL)
return -EFAULT;
if (vdev == NULL)
return -EFAULT;
mutex_lock(&dev->modlock);
if (dev->image_read_pos == 0) {
add_wait_queue(&dev->wait_frame, &wait);
while (dev->full_frames == NULL) {
if (dev->error_status) {
remove_wait_queue(&dev->wait_frame, &wait);
set_current_state(TASK_RUNNING);
mutex_unlock(&dev->modlock);
return -dev->error_status ;
}
if (noblock) {
remove_wait_queue(&dev->wait_frame, &wait);
set_current_state(TASK_RUNNING);
mutex_unlock(&dev->modlock);
return -EWOULDBLOCK;
}
if (signal_pending(current)) {
remove_wait_queue(&dev->wait_frame, &wait);
set_current_state(TASK_RUNNING);
mutex_unlock(&dev->modlock);
return -ERESTARTSYS;
}
schedule();
set_current_state(TASK_INTERRUPTIBLE);
}
remove_wait_queue(&dev->wait_frame, &wait);
set_current_state(TASK_RUNNING);
if (stk11xx_handle_frame(dev)) {
mutex_unlock(&dev->modlock);
return -EFAULT;
}
}
bytes_to_read = dev->view_size;
if (count + dev->image_read_pos > bytes_to_read)
count = bytes_to_read - dev->image_read_pos;
image_buffer_addr = dev->image_data;
image_buffer_addr += dev->images[dev->fill_image].offset;
image_buffer_addr += dev->image_read_pos;
if (copy_to_user(buf, image_buffer_addr, count)) {
mutex_unlock(&dev->modlock);
return -EFAULT;
}
dev->image_read_pos += count;
if (dev->image_read_pos >= bytes_to_read) {
dev->image_read_pos = 0;
stk11xx_next_image(dev);
}
mutex_unlock(&dev->modlock);
return count;
}
/**
* @param fp File pointer
* @param wait
*
* @returns 0 if all is OK
*
* @brief Polling function
*/
static unsigned int v4l_stk11xx_poll(struct file *fp, poll_table *wait)
{
struct usb_stk11xx *dev;
struct video_device *vdev;
vdev = video_devdata(fp);
dev = video_get_drvdata(video_devdata(fp));
STK_STREAM("Poll\n");
if (vdev == NULL)
return -EFAULT;
if (dev == NULL)
return -EFAULT;
poll_wait(fp, &dev->wait_frame, wait);
if (dev->error_status)
return POLLERR;
if (dev->full_frames != NULL)
return (POLLIN | POLLRDNORM);
return 0;
}
/**
* @param fp File pointer
* @param vma VMA structure
*
* @returns 0 if all is OK
*
* @brief Memory map
*
* This function permits to map a memory space.
*/
static int v4l_stk11xx_mmap(struct file *fp, struct vm_area_struct *vma)
{
unsigned int i;
unsigned long size;
unsigned long start;
unsigned long pos;
unsigned long page;
struct usb_stk11xx *dev;
struct video_device *vdev;
vdev = video_devdata(fp);
dev = video_get_drvdata(video_devdata(fp));
STK_STREAM("mmap\n");
start = vma->vm_start;
size = vma->vm_end - vma->vm_start;
// Find the buffer for this mapping...
for (i=0; i<dev->nbuffers; i++) {
pos = dev->images[i].offset;
if ((pos >> PAGE_SHIFT) == vma->vm_pgoff)
break;
}
// If no buffer found !
if (i == STK11XX_MAX_IMAGES) {
STK_ERROR("mmap no buffer found !\n");
return -EINVAL;
}
if (i == 0) {
unsigned long total_size;
total_size = dev->nbuffers * dev->len_per_image;
if (size != dev->len_per_image && size != total_size) {
STK_ERROR("Wrong size (%lu) needed to be len_per_image=%d or total_size=%lu\n",
size, dev->len_per_image, total_size);
return -EINVAL;
}
}
else if (size > dev->len_per_image)
return -EINVAL;
vma->vm_flags |= VM_IO;
pos = (unsigned long) dev->image_data;
while (size > 0) {
page = vmalloc_to_pfn((void *) pos);
if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
return -EAGAIN;
start += PAGE_SIZE;
pos += PAGE_SIZE;
if (size > PAGE_SIZE)
size -= PAGE_SIZE;
else
size = 0;
}
return 0;
}
/**
* @param fp File pointer
* @param cmd Command
* @param arg Arguments of the command
*
* @returns 0 if all is OK
*
* @brief Manage IOCTL
*
* This function permits to manage all the IOCTL from the application.
*/
static long v4l_stk11xx_do_ioctl(struct file *fp,
unsigned int cmd, void __user *arg)
{
struct usb_stk11xx *dev;
struct video_device *vdev;
DECLARE_WAITQUEUE(wait, current);
vdev = video_devdata(fp);
dev = video_get_drvdata(video_devdata(fp));
#if (CONFIG_STK11XX_DEBUG == 1)
v4l_printk_ioctl(cmd);
#endif
switch (cmd) {
#ifdef VIDIOCGCAP
// Video 4 Linux v1
case VIDIOCGCAP:
{
struct video_capability *cap = arg;
STK_DEBUG("VIDIOCGCAP\n");
memset(cap, 0, sizeof(*cap));
strlcpy(cap->name, "stk11xx", sizeof(cap->name));
cap->type = VID_TYPE_CAPTURE;
cap->channels = 1;
cap->audios = 0;
switch (dev->webcam_type) {
case STK11XX_SXGA:
cap->minwidth = stk11xx_image_sizes[STK11XX_80x60].x;
cap->minheight = stk11xx_image_sizes[STK11XX_80x60].y;
cap->maxwidth = stk11xx_image_sizes[STK11XX_1280x1024].x;
cap->maxheight = stk11xx_image_sizes[STK11XX_1280x1024].y;
break;
case STK11XX_PAL:
cap->minwidth = stk11xx_image_sizes[STK11XX_640x480].x;
cap->minheight = stk11xx_image_sizes[STK11XX_640x480].y;
cap->maxwidth = stk11xx_image_sizes[STK11XX_720x576].x;
cap->maxheight = stk11xx_image_sizes[STK11XX_720x576].y;
break;
case STK11XX_VGA:
cap->minwidth = stk11xx_image_sizes[STK11XX_80x60].x;
cap->minheight = stk11xx_image_sizes[STK11XX_80x60].y;
cap->maxwidth = stk11xx_image_sizes[STK11XX_640x480].x;
cap->maxheight = stk11xx_image_sizes[STK11XX_640x480].y;
break;
}
}
break;
case VIDIOCGCHAN:
{
struct video_channel *v = arg;
STK_DEBUG("VIDIOCGCHAN\n");
if (v->channel != 0)
return -EINVAL;
v->flags = 0;
v->tuners = 0;
v->type = VIDEO_TYPE_CAMERA;
strcpy(v->name, "Webcam");
}
break;
case VIDIOCSCHAN:
{
struct video_channel *v = arg;
STK_DEBUG("VIDIOCSCHAN\n");
if (v->channel != 0)
return -EINVAL;
}
break;
case VIDIOCGPICT:
{
struct video_picture *p = arg;
STK_DEBUG("VIDIOCGPICT\n");
p->brightness = dev->vsettings.brightness;
p->contrast = dev->vsettings.contrast;
p->whiteness = dev->vsettings.whiteness;
p->colour = dev->vsettings.colour;
p->depth = dev->vsettings.depth;
p->palette = dev->vsettings.palette;
p->hue = dev->vsettings.hue;
switch (dev->vsettings.palette) {
case STK11XX_PALETTE_BGR24:
p->palette = VIDEO_PALETTE_RGB24;
break;
case STK11XX_PALETTE_BGR32:
p->palette = VIDEO_PALETTE_RGB32;
break;
case STK11XX_PALETTE_UYVY:
p->palette = VIDEO_PALETTE_UYVY;
break;
case STK11XX_PALETTE_YUYV:
p->palette = VIDEO_PALETTE_YUYV;
break;
}
}
break;
case VIDIOCSPICT:
{
struct video_picture *p = arg;
STK_DEBUG("VIDIOCSPICT\n");
dev->vsettings.brightness = p->brightness;
dev->vsettings.contrast = p->contrast;
dev->vsettings.whiteness = p->whiteness;
dev->vsettings.colour = p->colour;
dev->vsettings.hue = p->hue;
if (p->palette && p->palette != dev->vsettings.palette) {
switch (p->palette) {
case VIDEO_PALETTE_RGB24:
dev->vsettings.depth = 24;
dev->vsettings.palette = STK11XX_PALETTE_BGR24;
break;
case VIDEO_PALETTE_RGB32:
dev->vsettings.depth = 32;
dev->vsettings.palette = STK11XX_PALETTE_BGR32;
break;
case VIDEO_PALETTE_UYVY:
dev->vsettings.depth = 16;
dev->vsettings.palette = STK11XX_PALETTE_UYVY;
break;
case VIDEO_PALETTE_YUYV:
dev->vsettings.depth = 16;
dev->vsettings.palette = STK11XX_PALETTE_YUYV;
break;
default:
return -EINVAL;
}
}
dev_stk11xx_camera_settings(dev);
STK_DEBUG("VIDIOCSPICT done\n");
}
break;
case VIDIOCGWIN:
{
struct video_window *vw = arg;
STK_DEBUG("VIDIOCGWIN\n");
vw->x = 0;
vw->y = 0;
vw->width = dev->view.x;
vw->height = dev->view.y;
vw->chromakey = 0;
}
break;
case VIDIOCSWIN:
{
struct video_window *vw = arg;
STK_DEBUG("VIDIOCSWIN\n");
STK_DEBUG("Set x=%d, y=%d\n", vw->x, vw->y);
STK_DEBUG("Set width=%d, height=%d\n", vw->width, vw->height);
STK_DEBUG("Flags = %X\n", vw->flags);
// Stop the video stream
dev_stk11xx_stop_stream(dev);
// ISOC and URB cleanup
usb_stk11xx_isoc_cleanup(dev);
// Switch off the camera
dev_stk11xx_camera_off(dev);
dev_stk11xx_camera_asleep(dev);
// Select the new video mode
if (v4l_stk11xx_select_video_mode(dev, vw->width, vw->height)) {
STK_ERROR("Select video mode failed !\n");
return -EAGAIN;
}
// Clear the buffers
stk11xx_clear_buffers(dev);
// Initialize the device
dev_stk11xx_init_camera(dev);
dev_stk11xx_camera_on(dev);
dev_stk11xx_reconf_camera(dev);
// ISOC and URB init
usb_stk11xx_isoc_init(dev);
// Re-start the stream
dev_stk11xx_start_stream(dev);
// Video settings
dev_stk11xx_camera_settings(dev);
}
break;
case VIDIOCGFBUF:
{
struct video_buffer *vb = arg;
STK_DEBUG("VIDIOCGFBUF\n");
memset(vb, 0, sizeof(*vb));
}
break;
case VIDIOCGMBUF:
{
int i;
struct video_mbuf *vm = arg;
STK_DEBUG("VIDIOCGMBUF\n");
memset(vm, 0, sizeof(*vm));
vm->size = dev->nbuffers * dev->len_per_image;
vm->frames = dev->nbuffers;
for (i=0; i<dev->nbuffers; i++)
vm->offsets[i] = i * dev->len_per_image;
}
break;
case VIDIOCMCAPTURE:
{
struct video_mmap *vm = arg;
STK_DEBUG("VIDIOCMCAPTURE format=%d\n", vm->format);
if (vm->frame < 0 || vm->frame >= dev->nbuffers)
return -EINVAL;
if (vm->format) {
switch (vm->format) {
case VIDEO_PALETTE_RGB32:
break;
case VIDEO_PALETTE_RGB24:
break;
case VIDEO_PALETTE_UYVY:
break;
case VIDEO_PALETTE_YUYV:
break;
default:
return -EINVAL;
}
}
if ((vm->width != dev->view.x) || (vm->height != dev->view.y))
return -EAGAIN;
if (dev->image_used[vm->frame])
return -EBUSY;
dev->image_used[vm->frame] = 1;
STK_DEBUG("VIDIOCMCAPTURE done\n");
}
break;
case VIDIOCSYNC:
{
int ret;
int *mbuf = arg;
STK_DEBUG("VIDIOCSYNC\n");
if (*mbuf < 0 || *mbuf >= dev->nbuffers)
return -EINVAL;
if (dev->image_used[*mbuf] == 0)
return -EINVAL;
add_wait_queue(&dev->wait_frame, &wait);
while (dev->full_frames == NULL) {
if (dev->error_status) {
remove_wait_queue(&dev->wait_frame, &wait);
set_current_state(TASK_RUNNING);
return -dev->error_status;
}
if (signal_pending(current)) {
remove_wait_queue(&dev->wait_frame, &wait);
set_current_state(TASK_RUNNING);
return -ERESTARTSYS;
}
schedule();
set_current_state(TASK_INTERRUPTIBLE);
}
remove_wait_queue(&dev->wait_frame, &wait);
set_current_state(TASK_RUNNING);
STK_DEBUG("VIDIOCSYNC: frame ready\n");
dev->fill_image = *mbuf;
ret = stk11xx_handle_frame(dev);