}
mutex_init(&streaming->mutex);
+ streaming->dev = dev;
streaming->intf = usb_get_intf(intf);
streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
streaming->maxpsize = psize;
}
- list_add_tail(&streaming->list, &dev->streaming);
+ list_add_tail(&streaming->list, &dev->streams);
return 0;
error:
*/
static void uvc_unregister_video(struct uvc_device *dev)
{
- if (dev->video.vdev) {
- if (dev->video.vdev->minor == -1)
- video_device_release(dev->video.vdev);
+ struct uvc_streaming *streaming;
+
+ list_for_each_entry(streaming, &dev->streams, list) {
+ if (streaming->vdev == NULL)
+ continue;
+
+ if (streaming->vdev->minor == -1)
+ video_device_release(streaming->vdev);
else
- video_unregister_device(dev->video.vdev);
- dev->video.vdev = NULL;
+ video_unregister_device(streaming->vdev);
+ streaming->vdev = NULL;
+ }
+}
+
+static int uvc_register_video(struct uvc_device *dev,
+ struct uvc_streaming *stream)
+{
+ struct video_device *vdev;
+ struct uvc_entity *term;
+ int ret;
+
+ if (uvc_trace_param & UVC_TRACE_PROBE) {
+ uvc_printk(KERN_INFO, "Found a valid video chain (");
+ list_for_each_entry(term, &dev->video.iterms, chain) {
+ printk("%d", term->id);
+ if (term->chain.next != &dev->video.iterms)
+ printk(",");
+ }
+ printk(" -> %d).\n", dev->video.oterm->id);
+ }
+
+ /* Initialize the streaming interface with default streaming
+ * parameters.
+ */
+ ret = uvc_video_init(stream);
+ if (ret < 0) {
+ uvc_printk(KERN_ERR, "Failed to initialize the device "
+ "(%d).\n", ret);
+ return ret;
+ }
+
+ /* Register the device with V4L. */
+ vdev = video_device_alloc();
+ if (vdev == NULL)
+ return -1;
+
+ /* We already hold a reference to dev->udev. The video device will be
+ * unregistered before the reference is released, so we don't need to
+ * get another one.
+ */
+ vdev->parent = &dev->intf->dev;
+ vdev->minor = -1;
+ vdev->fops = &uvc_fops;
+ vdev->release = video_device_release;
+ strlcpy(vdev->name, dev->name, sizeof vdev->name);
+
+ /* Set the driver data before calling video_register_device, otherwise
+ * uvc_v4l2_open might race us.
+ */
+ stream->vdev = vdev;
+ video_set_drvdata(vdev, stream);
+
+ if (video_register_device(vdev, VFL_TYPE_GRABBER, -1) < 0) {
+ stream->vdev = NULL;
+ video_device_release(vdev);
+ return -1;
}
+
+ return 0;
}
/*
}
/*
- * Register the video devices.
+ * Scan the device for video chains and register video devices.
*
* The driver currently supports a single video device per control interface
* only. The terminal and units must match the following structure:
* Extension Units connected to the main chain as single-unit branches are
* also supported.
*/
-static int uvc_register_video(struct uvc_device *dev)
+static int uvc_scan_device(struct uvc_device *dev)
{
- struct video_device *vdev;
struct uvc_entity *term;
- int found = 0, ret;
+ int found = 0;
/* Check if the control interface matches the structure we expect. */
list_for_each_entry(term, &dev->entities, list) {
- struct uvc_streaming *streaming;
+ struct uvc_streaming *stream;
if (!UVC_ENTITY_IS_TERM(term) || !UVC_ENTITY_IS_OTERM(term))
continue;
if (uvc_scan_chain(&dev->video) < 0)
continue;
- list_for_each_entry(streaming, &dev->streaming, list) {
- if (streaming->header.bTerminalLink ==
+ list_for_each_entry(stream, &dev->streams, list) {
+ if (stream->header.bTerminalLink ==
dev->video.sterm->id) {
- dev->video.streaming = streaming;
+ uvc_register_video(dev, stream);
found = 1;
break;
}
}
-
- if (found)
- break;
}
if (!found) {
return -1;
}
- if (uvc_trace_param & UVC_TRACE_PROBE) {
- uvc_printk(KERN_INFO, "Found a valid video chain (");
- list_for_each_entry(term, &dev->video.iterms, chain) {
- printk("%d", term->id);
- if (term->chain.next != &dev->video.iterms)
- printk(",");
- }
- printk(" -> %d).\n", dev->video.oterm->id);
- }
-
- /* Initialize the video buffers queue. */
- uvc_queue_init(&dev->video.queue, dev->video.streaming->type);
-
- /* Initialize the streaming interface with default streaming
- * parameters.
- */
- if ((ret = uvc_video_init(&dev->video)) < 0) {
- uvc_printk(KERN_ERR, "Failed to initialize the device "
- "(%d).\n", ret);
- return ret;
- }
-
- /* Register the device with V4L. */
- vdev = video_device_alloc();
- if (vdev == NULL)
- return -1;
-
- /* We already hold a reference to dev->udev. The video device will be
- * unregistered before the reference is released, so we don't need to
- * get another one.
- */
- vdev->parent = &dev->intf->dev;
- vdev->minor = -1;
- vdev->fops = &uvc_fops;
- vdev->release = video_device_release;
- strlcpy(vdev->name, dev->name, sizeof vdev->name);
-
- /* Set the driver data before calling video_register_device, otherwise
- * uvc_v4l2_open might race us.
- */
- dev->video.vdev = vdev;
- video_set_drvdata(vdev, &dev->video);
-
- if (video_register_device(vdev, VFL_TYPE_GRABBER, -1) < 0) {
- dev->video.vdev = NULL;
- video_device_release(vdev);
- return -1;
- }
-
return 0;
}
kfree(entity);
}
- list_for_each_safe(p, n, &dev->streaming) {
+ list_for_each_safe(p, n, &dev->streams) {
struct uvc_streaming *streaming;
streaming = list_entry(p, struct uvc_streaming, list);
usb_driver_release_interface(&uvc_driver.driver,
return -ENOMEM;
INIT_LIST_HEAD(&dev->entities);
- INIT_LIST_HEAD(&dev->streaming);
+ INIT_LIST_HEAD(&dev->streams);
kref_init(&dev->kref);
atomic_set(&dev->users, 0);
if (uvc_ctrl_init_device(dev) < 0)
goto error;
- /* Register the video devices. */
- if (uvc_register_video(dev) < 0)
+ /* Scan the device for video chains and register video devices. */
+ if (uvc_scan_device(dev) < 0)
goto error;
/* Save our data pointer in the interface data. */
static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
{
struct uvc_device *dev = usb_get_intfdata(intf);
+ struct uvc_streaming *stream;
uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
intf->cur_altsetting->desc.bInterfaceNumber);
UVC_SC_VIDEOCONTROL)
return uvc_status_suspend(dev);
- if (dev->video.streaming->intf != intf) {
- uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB "
- "interface mismatch.\n");
- return -EINVAL;
+ list_for_each_entry(stream, &dev->streams, list) {
+ if (stream->intf == intf)
+ return uvc_video_suspend(stream);
}
- return uvc_video_suspend(&dev->video);
+ uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface "
+ "mismatch.\n");
+ return -EINVAL;
}
static int __uvc_resume(struct usb_interface *intf, int reset)
{
struct uvc_device *dev = usb_get_intfdata(intf);
+ struct uvc_streaming *stream;
uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
intf->cur_altsetting->desc.bInterfaceNumber);
return uvc_status_resume(dev);
}
- if (dev->video.streaming->intf != intf) {
- uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB "
- "interface mismatch.\n");
- return -EINVAL;
+ list_for_each_entry(stream, &dev->streams, list) {
+ if (stream->intf == intf)
+ return uvc_video_resume(stream);
}
- return uvc_video_resume(&dev->video);
+ uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface "
+ "mismatch.\n");
+ return -EINVAL;
}
static int uvc_resume(struct usb_interface *intf)
return interval;
}
-static int uvc_v4l2_try_format(struct uvc_video_device *video,
+static int uvc_v4l2_try_format(struct uvc_streaming *stream,
struct v4l2_format *fmt, struct uvc_streaming_control *probe,
struct uvc_format **uvc_format, struct uvc_frame **uvc_frame)
{
int ret = 0;
__u8 *fcc;
- if (fmt->type != video->streaming->type)
+ if (fmt->type != stream->type)
return -EINVAL;
fcc = (__u8 *)&fmt->fmt.pix.pixelformat;
fmt->fmt.pix.width, fmt->fmt.pix.height);
/* Check if the hardware supports the requested format. */
- for (i = 0; i < video->streaming->nformats; ++i) {
- format = &video->streaming->format[i];
+ for (i = 0; i < stream->nformats; ++i) {
+ format = &stream->format[i];
if (format->fcc == fmt->fmt.pix.pixelformat)
break;
}
* developers test their webcams with the Linux driver as well as with
* the Windows driver).
*/
- if (video->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS)
+ if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS)
probe->dwMaxVideoFrameSize =
- video->streaming->ctrl.dwMaxVideoFrameSize;
+ stream->ctrl.dwMaxVideoFrameSize;
/* Probe the device. */
- if ((ret = uvc_probe_video(video, probe)) < 0)
+ ret = uvc_probe_video(stream, probe);
+ if (ret < 0)
goto done;
fmt->fmt.pix.width = frame->wWidth;
return ret;
}
-static int uvc_v4l2_get_format(struct uvc_video_device *video,
+static int uvc_v4l2_get_format(struct uvc_streaming *stream,
struct v4l2_format *fmt)
{
- struct uvc_format *format = video->streaming->cur_format;
- struct uvc_frame *frame = video->streaming->cur_frame;
+ struct uvc_format *format = stream->cur_format;
+ struct uvc_frame *frame = stream->cur_frame;
- if (fmt->type != video->streaming->type)
+ if (fmt->type != stream->type)
return -EINVAL;
if (format == NULL || frame == NULL)
fmt->fmt.pix.height = frame->wHeight;
fmt->fmt.pix.field = V4L2_FIELD_NONE;
fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8;
- fmt->fmt.pix.sizeimage = video->streaming->ctrl.dwMaxVideoFrameSize;
+ fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize;
fmt->fmt.pix.colorspace = format->colorspace;
fmt->fmt.pix.priv = 0;
return 0;
}
-static int uvc_v4l2_set_format(struct uvc_video_device *video,
+static int uvc_v4l2_set_format(struct uvc_streaming *stream,
struct v4l2_format *fmt)
{
struct uvc_streaming_control probe;
struct uvc_frame *frame;
int ret;
- if (fmt->type != video->streaming->type)
+ if (fmt->type != stream->type)
return -EINVAL;
- if (uvc_queue_allocated(&video->queue))
+ if (uvc_queue_allocated(&stream->queue))
return -EBUSY;
- ret = uvc_v4l2_try_format(video, fmt, &probe, &format, &frame);
+ ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame);
if (ret < 0)
return ret;
- memcpy(&video->streaming->ctrl, &probe, sizeof probe);
- video->streaming->cur_format = format;
- video->streaming->cur_frame = frame;
+ memcpy(&stream->ctrl, &probe, sizeof probe);
+ stream->cur_format = format;
+ stream->cur_frame = frame;
return 0;
}
-static int uvc_v4l2_get_streamparm(struct uvc_video_device *video,
+static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream,
struct v4l2_streamparm *parm)
{
uint32_t numerator, denominator;
- if (parm->type != video->streaming->type)
+ if (parm->type != stream->type)
return -EINVAL;
- numerator = video->streaming->ctrl.dwFrameInterval;
+ numerator = stream->ctrl.dwFrameInterval;
denominator = 10000000;
uvc_simplify_fraction(&numerator, &denominator, 8, 333);
memset(parm, 0, sizeof *parm);
- parm->type = video->streaming->type;
+ parm->type = stream->type;
- if (video->streaming->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+ if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
parm->parm.capture.capturemode = 0;
parm->parm.capture.timeperframe.numerator = numerator;
return 0;
}
-static int uvc_v4l2_set_streamparm(struct uvc_video_device *video,
+static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
struct v4l2_streamparm *parm)
{
- struct uvc_frame *frame = video->streaming->cur_frame;
+ struct uvc_frame *frame = stream->cur_frame;
struct uvc_streaming_control probe;
struct v4l2_fract timeperframe;
uint32_t interval;
int ret;
- if (parm->type != video->streaming->type)
+ if (parm->type != stream->type)
return -EINVAL;
- if (uvc_queue_streaming(&video->queue))
+ if (uvc_queue_streaming(&stream->queue))
return -EBUSY;
if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
else
timeperframe = parm->parm.output.timeperframe;
- memcpy(&probe, &video->streaming->ctrl, sizeof probe);
+ memcpy(&probe, &stream->ctrl, sizeof probe);
interval = uvc_fraction_to_interval(timeperframe.numerator,
timeperframe.denominator);
probe.dwFrameInterval = uvc_try_frame_interval(frame, interval);
/* Probe the device with the new settings. */
- if ((ret = uvc_probe_video(video, &probe)) < 0)
+ ret = uvc_probe_video(stream, &probe);
+ if (ret < 0)
return ret;
- memcpy(&video->streaming->ctrl, &probe, sizeof probe);
+ memcpy(&stream->ctrl, &probe, sizeof probe);
/* Return the actual frame period. */
timeperframe.numerator = probe.dwFrameInterval;
/* Check if the device already has a privileged handle. */
mutex_lock(&uvc_driver.open_mutex);
- if (atomic_inc_return(&handle->device->active) != 1) {
- atomic_dec(&handle->device->active);
+ if (atomic_inc_return(&handle->stream->active) != 1) {
+ atomic_dec(&handle->stream->active);
ret = -EBUSY;
goto done;
}
static void uvc_dismiss_privileges(struct uvc_fh *handle)
{
if (handle->state == UVC_HANDLE_ACTIVE)
- atomic_dec(&handle->device->active);
+ atomic_dec(&handle->stream->active);
handle->state = UVC_HANDLE_PASSIVE;
}
static int uvc_v4l2_open(struct file *file)
{
- struct uvc_video_device *video;
+ struct uvc_streaming *stream;
struct uvc_fh *handle;
int ret = 0;
uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n");
mutex_lock(&uvc_driver.open_mutex);
- video = video_drvdata(file);
+ stream = video_drvdata(file);
- if (video->dev->state & UVC_DEV_DISCONNECTED) {
+ if (stream->dev->state & UVC_DEV_DISCONNECTED) {
ret = -ENODEV;
goto done;
}
- ret = usb_autopm_get_interface(video->dev->intf);
+ ret = usb_autopm_get_interface(stream->dev->intf);
if (ret < 0)
goto done;
/* Create the device handle. */
handle = kzalloc(sizeof *handle, GFP_KERNEL);
if (handle == NULL) {
- usb_autopm_put_interface(video->dev->intf);
+ usb_autopm_put_interface(stream->dev->intf);
ret = -ENOMEM;
goto done;
}
- if (atomic_inc_return(&video->dev->users) == 1) {
- if ((ret = uvc_status_start(video->dev)) < 0) {
- usb_autopm_put_interface(video->dev->intf);
- atomic_dec(&video->dev->users);
+ if (atomic_inc_return(&stream->dev->users) == 1) {
+ ret = uvc_status_start(stream->dev);
+ if (ret < 0) {
+ usb_autopm_put_interface(stream->dev->intf);
+ atomic_dec(&stream->dev->users);
kfree(handle);
goto done;
}
}
- handle->device = video;
+ handle->video = &stream->dev->video;
+ handle->stream = stream;
handle->state = UVC_HANDLE_PASSIVE;
file->private_data = handle;
- kref_get(&video->dev->kref);
+ kref_get(&stream->dev->kref);
done:
mutex_unlock(&uvc_driver.open_mutex);
static int uvc_v4l2_release(struct file *file)
{
- struct uvc_video_device *video = video_drvdata(file);
struct uvc_fh *handle = (struct uvc_fh *)file->private_data;
+ struct uvc_streaming *stream = handle->stream;
uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_release\n");
/* Only free resources if this is a privileged handle. */
if (uvc_has_privileges(handle)) {
- uvc_video_enable(video, 0);
+ uvc_video_enable(stream, 0);
- mutex_lock(&video->queue.mutex);
- if (uvc_free_buffers(&video->queue) < 0)
+ mutex_lock(&stream->queue.mutex);
+ if (uvc_free_buffers(&stream->queue) < 0)
uvc_printk(KERN_ERR, "uvc_v4l2_release: Unable to "
"free buffers.\n");
- mutex_unlock(&video->queue.mutex);
+ mutex_unlock(&stream->queue.mutex);
}
/* Release the file handle. */
kfree(handle);
file->private_data = NULL;
- if (atomic_dec_return(&video->dev->users) == 0)
- uvc_status_stop(video->dev);
+ if (atomic_dec_return(&stream->dev->users) == 0)
+ uvc_status_stop(stream->dev);
- usb_autopm_put_interface(video->dev->intf);
- kref_put(&video->dev->kref, uvc_delete);
+ usb_autopm_put_interface(stream->dev->intf);
+ kref_put(&stream->dev->kref, uvc_delete);
return 0;
}
static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
{
struct video_device *vdev = video_devdata(file);
- struct uvc_video_device *video = video_get_drvdata(vdev);
struct uvc_fh *handle = (struct uvc_fh *)file->private_data;
+ struct uvc_video_device *video = handle->video;
+ struct uvc_streaming *stream = handle->stream;
long ret = 0;
switch (cmd) {
memset(cap, 0, sizeof *cap);
strlcpy(cap->driver, "uvcvideo", sizeof cap->driver);
strlcpy(cap->card, vdev->name, sizeof cap->card);
- usb_make_path(video->dev->udev,
+ usb_make_path(stream->dev->udev,
cap->bus_info, sizeof(cap->bus_info));
cap->version = DRIVER_VERSION_NUMBER;
- if (video->streaming->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_STREAMING;
else
enum v4l2_buf_type type = fmt->type;
__u32 index = fmt->index;
- if (fmt->type != video->streaming->type ||
- fmt->index >= video->streaming->nformats)
+ if (fmt->type != stream->type ||
+ fmt->index >= stream->nformats)
return -EINVAL;
memset(fmt, 0, sizeof(*fmt));
fmt->index = index;
fmt->type = type;
- format = &video->streaming->format[fmt->index];
+ format = &stream->format[fmt->index];
fmt->flags = 0;
if (format->flags & UVC_FMT_FLAG_COMPRESSED)
fmt->flags |= V4L2_FMT_FLAG_COMPRESSED;
if ((ret = uvc_acquire_privileges(handle)) < 0)
return ret;
- return uvc_v4l2_try_format(video, arg, &probe, NULL, NULL);
+ return uvc_v4l2_try_format(stream, arg, &probe, NULL, NULL);
}
case VIDIOC_S_FMT:
if ((ret = uvc_acquire_privileges(handle)) < 0)
return ret;
- return uvc_v4l2_set_format(video, arg);
+ return uvc_v4l2_set_format(stream, arg);
case VIDIOC_G_FMT:
- return uvc_v4l2_get_format(video, arg);
+ return uvc_v4l2_get_format(stream, arg);
/* Frame size enumeration */
case VIDIOC_ENUM_FRAMESIZES:
int i;
/* Look for the given pixel format */
- for (i = 0; i < video->streaming->nformats; i++) {
- if (video->streaming->format[i].fcc ==
+ for (i = 0; i < stream->nformats; i++) {
+ if (stream->format[i].fcc ==
fsize->pixel_format) {
- format = &video->streaming->format[i];
+ format = &stream->format[i];
break;
}
}
int i;
/* Look for the given pixel format and frame size */
- for (i = 0; i < video->streaming->nformats; i++) {
- if (video->streaming->format[i].fcc ==
+ for (i = 0; i < stream->nformats; i++) {
+ if (stream->format[i].fcc ==
fival->pixel_format) {
- format = &video->streaming->format[i];
+ format = &stream->format[i];
break;
}
}
/* Get & Set streaming parameters */
case VIDIOC_G_PARM:
- return uvc_v4l2_get_streamparm(video, arg);
+ return uvc_v4l2_get_streamparm(stream, arg);
case VIDIOC_S_PARM:
if ((ret = uvc_acquire_privileges(handle)) < 0)
return ret;
- return uvc_v4l2_set_streamparm(video, arg);
+ return uvc_v4l2_set_streamparm(stream, arg);
/* Cropping and scaling */
case VIDIOC_CROPCAP:
{
struct v4l2_cropcap *ccap = arg;
- struct uvc_frame *frame = video->streaming->cur_frame;
+ struct uvc_frame *frame = stream->cur_frame;
- if (ccap->type != video->streaming->type)
+ if (ccap->type != stream->type)
return -EINVAL;
ccap->bounds.left = 0;
{
struct v4l2_requestbuffers *rb = arg;
unsigned int bufsize =
- video->streaming->ctrl.dwMaxVideoFrameSize;
+ stream->ctrl.dwMaxVideoFrameSize;
- if (rb->type != video->streaming->type ||
+ if (rb->type != stream->type ||
rb->memory != V4L2_MEMORY_MMAP)
return -EINVAL;
if ((ret = uvc_acquire_privileges(handle)) < 0)
return ret;
- ret = uvc_alloc_buffers(&video->queue, rb->count, bufsize);
+ ret = uvc_alloc_buffers(&stream->queue, rb->count, bufsize);
if (ret < 0)
return ret;
{
struct v4l2_buffer *buf = arg;
- if (buf->type != video->streaming->type)
+ if (buf->type != stream->type)
return -EINVAL;
if (!uvc_has_privileges(handle))
return -EBUSY;
- return uvc_query_buffer(&video->queue, buf);
+ return uvc_query_buffer(&stream->queue, buf);
}
case VIDIOC_QBUF:
if (!uvc_has_privileges(handle))
return -EBUSY;
- return uvc_queue_buffer(&video->queue, arg);
+ return uvc_queue_buffer(&stream->queue, arg);
case VIDIOC_DQBUF:
if (!uvc_has_privileges(handle))
return -EBUSY;
- return uvc_dequeue_buffer(&video->queue, arg,
+ return uvc_dequeue_buffer(&stream->queue, arg,
file->f_flags & O_NONBLOCK);
case VIDIOC_STREAMON:
{
int *type = arg;
- if (*type != video->streaming->type)
+ if (*type != stream->type)
return -EINVAL;
if (!uvc_has_privileges(handle))
return -EBUSY;
- if ((ret = uvc_video_enable(video, 1)) < 0)
+ ret = uvc_video_enable(stream, 1);
+ if (ret < 0)
return ret;
break;
}
{
int *type = arg;
- if (*type != video->streaming->type)
+ if (*type != stream->type)
return -EINVAL;
if (!uvc_has_privileges(handle))
return -EBUSY;
- return uvc_video_enable(video, 0);
+ return uvc_video_enable(stream, 0);
}
/* Analog video standards make no sense for digital cameras. */
static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
{
- struct uvc_video_device *video = video_drvdata(file);
+ struct uvc_fh *handle = (struct uvc_fh *)file->private_data;
+ struct uvc_streaming *stream = handle->stream;
+ struct uvc_video_queue *queue = &stream->queue;
struct uvc_buffer *uninitialized_var(buffer);
struct page *page;
unsigned long addr, start, size;
start = vma->vm_start;
size = vma->vm_end - vma->vm_start;
- mutex_lock(&video->queue.mutex);
+ mutex_lock(&queue->mutex);
- for (i = 0; i < video->queue.count; ++i) {
- buffer = &video->queue.buffer[i];
+ for (i = 0; i < queue->count; ++i) {
+ buffer = &queue->buffer[i];
if ((buffer->buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
break;
}
- if (i == video->queue.count || size != video->queue.buf_size) {
+ if (i == queue->count || size != queue->buf_size) {
ret = -EINVAL;
goto done;
}
*/
vma->vm_flags |= VM_IO;
- addr = (unsigned long)video->queue.mem + buffer->buf.m.offset;
+ addr = (unsigned long)queue->mem + buffer->buf.m.offset;
while (size > 0) {
page = vmalloc_to_page((void *)addr);
if ((ret = vm_insert_page(vma, start, page)) < 0)
uvc_vm_open(vma);
done:
- mutex_unlock(&video->queue.mutex);
+ mutex_unlock(&queue->mutex);
return ret;
}
static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait)
{
- struct uvc_video_device *video = video_drvdata(file);
+ struct uvc_fh *handle = (struct uvc_fh *)file->private_data;
+ struct uvc_streaming *stream = handle->stream;
uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n");
- return uvc_queue_poll(&video->queue, file, wait);
+ return uvc_queue_poll(&stream->queue, file, wait);
}
const struct v4l2_file_operations uvc_fops = {
return 0;
}
-static void uvc_fixup_video_ctrl(struct uvc_video_device *video,
+static void uvc_fixup_video_ctrl(struct uvc_streaming *stream,
struct uvc_streaming_control *ctrl)
{
struct uvc_format *format;
unsigned int i;
if (ctrl->bFormatIndex <= 0 ||
- ctrl->bFormatIndex > video->streaming->nformats)
+ ctrl->bFormatIndex > stream->nformats)
return;
- format = &video->streaming->format[ctrl->bFormatIndex - 1];
+ format = &stream->format[ctrl->bFormatIndex - 1];
for (i = 0; i < format->nframes; ++i) {
if (format->frame[i].bFrameIndex == ctrl->bFrameIndex) {
if (!(format->flags & UVC_FMT_FLAG_COMPRESSED) ||
(ctrl->dwMaxVideoFrameSize == 0 &&
- video->dev->uvc_version < 0x0110))
+ stream->dev->uvc_version < 0x0110))
ctrl->dwMaxVideoFrameSize =
frame->dwMaxVideoFrameBufferSize;
- if (video->dev->quirks & UVC_QUIRK_FIX_BANDWIDTH &&
- video->streaming->intf->num_altsetting > 1) {
+ if (stream->dev->quirks & UVC_QUIRK_FIX_BANDWIDTH &&
+ stream->intf->num_altsetting > 1) {
u32 interval;
u32 bandwidth;
bandwidth = frame->wWidth * frame->wHeight / 8 * format->bpp;
bandwidth *= 10000000 / interval + 1;
bandwidth /= 1000;
- if (video->dev->udev->speed == USB_SPEED_HIGH)
+ if (stream->dev->udev->speed == USB_SPEED_HIGH)
bandwidth /= 8;
bandwidth += 12;
}
}
-static int uvc_get_video_ctrl(struct uvc_video_device *video,
+static int uvc_get_video_ctrl(struct uvc_streaming *stream,
struct uvc_streaming_control *ctrl, int probe, __u8 query)
{
__u8 *data;
__u16 size;
int ret;
- size = video->dev->uvc_version >= 0x0110 ? 34 : 26;
+ size = stream->dev->uvc_version >= 0x0110 ? 34 : 26;
data = kmalloc(size, GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
if ((video->dev->quirks & UVC_QUIRK_PROBE_DEF) && query == UVC_GET_DEF)
return -EIO;
- ret = __uvc_query_ctrl(video->dev, query, 0, video->streaming->intfnum,
+ ret = __uvc_query_ctrl(stream->dev, query, 0, stream->intfnum,
probe ? UVC_VS_PROBE_CONTROL : UVC_VS_COMMIT_CONTROL, data,
size, UVC_CTRL_STREAMING_TIMEOUT);
* answer a GET_MIN or GET_MAX request with the wCompQuality
* field only.
*/
- uvc_warn_once(video->dev, UVC_WARN_MINMAX, "UVC non "
+ uvc_warn_once(stream->dev, UVC_WARN_MINMAX, "UVC non "
"compliance - GET_MIN/MAX(PROBE) incorrectly "
"supported. Enabling workaround.\n");
memset(ctrl, 0, sizeof ctrl);
* video probe control. Warn once and return, the caller will
* fall back to GET_CUR.
*/
- uvc_warn_once(video->dev, UVC_WARN_PROBE_DEF, "UVC non "
+ uvc_warn_once(stream->dev, UVC_WARN_PROBE_DEF, "UVC non "
"compliance - GET_DEF(PROBE) not supported. "
"Enabling workaround.\n");
ret = -EIO;
ctrl->bMinVersion = data[32];
ctrl->bMaxVersion = data[33];
} else {
- ctrl->dwClockFrequency = video->dev->clock_frequency;
+ ctrl->dwClockFrequency = stream->dev->clock_frequency;
ctrl->bmFramingInfo = 0;
ctrl->bPreferedVersion = 0;
ctrl->bMinVersion = 0;
* dwMaxPayloadTransferSize fields. Try to get the value from the
* format and frame descriptors.
*/
- uvc_fixup_video_ctrl(video, ctrl);
+ uvc_fixup_video_ctrl(stream, ctrl);
ret = 0;
out:
return ret;
}
-static int uvc_set_video_ctrl(struct uvc_video_device *video,
+static int uvc_set_video_ctrl(struct uvc_streaming *stream,
struct uvc_streaming_control *ctrl, int probe)
{
__u8 *data;
__u16 size;
int ret;
- size = video->dev->uvc_version >= 0x0110 ? 34 : 26;
+ size = stream->dev->uvc_version >= 0x0110 ? 34 : 26;
data = kzalloc(size, GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
data[33] = ctrl->bMaxVersion;
}
- ret = __uvc_query_ctrl(video->dev, UVC_SET_CUR, 0,
- video->streaming->intfnum,
+ ret = __uvc_query_ctrl(stream->dev, UVC_SET_CUR, 0, stream->intfnum,
probe ? UVC_VS_PROBE_CONTROL : UVC_VS_COMMIT_CONTROL, data,
size, UVC_CTRL_STREAMING_TIMEOUT);
if (ret != size) {
return ret;
}
-int uvc_probe_video(struct uvc_video_device *video,
+int uvc_probe_video(struct uvc_streaming *stream,
struct uvc_streaming_control *probe)
{
struct uvc_streaming_control probe_min, probe_max;
unsigned int i;
int ret;
- mutex_lock(&video->streaming->mutex);
+ mutex_lock(&stream->mutex);
/* Perform probing. The device should adjust the requested values
* according to its capabilities. However, some devices, namely the
* that reason, if the needed bandwidth exceeds the maximum available
* bandwidth, try to lower the quality.
*/
- if ((ret = uvc_set_video_ctrl(video, probe, 1)) < 0)
+ ret = uvc_set_video_ctrl(stream, probe, 1);
+ if (ret < 0)
goto done;
/* Get the minimum and maximum values for compression settings. */
- if (!(video->dev->quirks & UVC_QUIRK_PROBE_MINMAX)) {
- ret = uvc_get_video_ctrl(video, &probe_min, 1, UVC_GET_MIN);
+ if (!(stream->dev->quirks & UVC_QUIRK_PROBE_MINMAX)) {
+ ret = uvc_get_video_ctrl(stream, &probe_min, 1, UVC_GET_MIN);
if (ret < 0)
goto done;
- ret = uvc_get_video_ctrl(video, &probe_max, 1, UVC_GET_MAX);
+ ret = uvc_get_video_ctrl(stream, &probe_max, 1, UVC_GET_MAX);
if (ret < 0)
goto done;
}
for (i = 0; i < 2; ++i) {
- ret = uvc_set_video_ctrl(video, probe, 1);
+ ret = uvc_set_video_ctrl(stream, probe, 1);
if (ret < 0)
goto done;
- ret = uvc_get_video_ctrl(video, probe, 1, UVC_GET_CUR);
+ ret = uvc_get_video_ctrl(stream, probe, 1, UVC_GET_CUR);
if (ret < 0)
goto done;
- if (video->streaming->intf->num_altsetting == 1)
+ if (stream->intf->num_altsetting == 1)
break;
bandwidth = probe->dwMaxPayloadTransferSize;
- if (bandwidth <= video->streaming->maxpsize)
+ if (bandwidth <= stream->maxpsize)
break;
- if (video->dev->quirks & UVC_QUIRK_PROBE_MINMAX) {
+ if (stream->dev->quirks & UVC_QUIRK_PROBE_MINMAX) {
ret = -ENOSPC;
goto done;
}
}
done:
- mutex_unlock(&video->streaming->mutex);
+ mutex_unlock(&stream->mutex);
return ret;
}
-int uvc_commit_video(struct uvc_video_device *video,
+int uvc_commit_video(struct uvc_streaming *stream,
struct uvc_streaming_control *probe)
{
- return uvc_set_video_ctrl(video, probe, 0);
+ return uvc_set_video_ctrl(stream, probe, 0);
}
/* ------------------------------------------------------------------------
* to be called with a NULL buf parameter. uvc_video_decode_data and
* uvc_video_decode_end will never be called with a NULL buffer.
*/
-static int uvc_video_decode_start(struct uvc_video_device *video,
+static int uvc_video_decode_start(struct uvc_streaming *stream,
struct uvc_buffer *buf, const __u8 *data, int len)
{
__u8 fid;
* NULL.
*/
if (buf == NULL) {
- video->last_fid = fid;
+ stream->last_fid = fid;
return -ENODATA;
}
/* Synchronize to the input stream by waiting for the FID bit to be
* toggled when the the buffer state is not UVC_BUF_STATE_ACTIVE.
- * video->last_fid is initialized to -1, so the first isochronous
+ * stream->last_fid is initialized to -1, so the first isochronous
* frame will always be in sync.
*
- * If the device doesn't toggle the FID bit, invert video->last_fid
+ * If the device doesn't toggle the FID bit, invert stream->last_fid
* when the EOF bit is set to force synchronisation on the next packet.
*/
if (buf->state != UVC_BUF_STATE_ACTIVE) {
- if (fid == video->last_fid) {
+ if (fid == stream->last_fid) {
uvc_trace(UVC_TRACE_FRAME, "Dropping payload (out of "
"sync).\n");
- if ((video->dev->quirks & UVC_QUIRK_STREAM_NO_FID) &&
+ if ((stream->dev->quirks & UVC_QUIRK_STREAM_NO_FID) &&
(data[1] & UVC_STREAM_EOF))
- video->last_fid ^= UVC_STREAM_FID;
+ stream->last_fid ^= UVC_STREAM_FID;
return -ENODATA;
}
* last payload can be lost anyway). We thus must check if the FID has
* been toggled.
*
- * video->last_fid is initialized to -1, so the first isochronous
+ * stream->last_fid is initialized to -1, so the first isochronous
* frame will never trigger an end of frame detection.
*
* Empty buffers (bytesused == 0) don't trigger end of frame detection
* avoids detecting end of frame conditions at FID toggling if the
* previous payload had the EOF bit set.
*/
- if (fid != video->last_fid && buf->buf.bytesused != 0) {
+ if (fid != stream->last_fid && buf->buf.bytesused != 0) {
uvc_trace(UVC_TRACE_FRAME, "Frame complete (FID bit "
"toggled).\n");
buf->state = UVC_BUF_STATE_DONE;
return -EAGAIN;
}
- video->last_fid = fid;
+ stream->last_fid = fid;
return data[0];
}
-static void uvc_video_decode_data(struct uvc_video_device *video,
+static void uvc_video_decode_data(struct uvc_streaming *stream,
struct uvc_buffer *buf, const __u8 *data, int len)
{
- struct uvc_video_queue *queue = &video->queue;
+ struct uvc_video_queue *queue = &stream->queue;
unsigned int maxlen, nbytes;
void *mem;
}
}
-static void uvc_video_decode_end(struct uvc_video_device *video,
+static void uvc_video_decode_end(struct uvc_streaming *stream,
struct uvc_buffer *buf, const __u8 *data, int len)
{
/* Mark the buffer as done if the EOF marker is set. */
if (data[0] == len)
uvc_trace(UVC_TRACE_FRAME, "EOF in empty payload.\n");
buf->state = UVC_BUF_STATE_DONE;
- if (video->dev->quirks & UVC_QUIRK_STREAM_NO_FID)
- video->last_fid ^= UVC_STREAM_FID;
+ if (stream->dev->quirks & UVC_QUIRK_STREAM_NO_FID)
+ stream->last_fid ^= UVC_STREAM_FID;
}
}
* uvc_video_encode_data is called for every URB and copies the data from the
* video buffer to the transfer buffer.
*/
-static int uvc_video_encode_header(struct uvc_video_device *video,
+static int uvc_video_encode_header(struct uvc_streaming *stream,
struct uvc_buffer *buf, __u8 *data, int len)
{
data[0] = 2; /* Header length */
data[1] = UVC_STREAM_EOH | UVC_STREAM_EOF
- | (video->last_fid & UVC_STREAM_FID);
+ | (stream->last_fid & UVC_STREAM_FID);
return 2;
}
-static int uvc_video_encode_data(struct uvc_video_device *video,
+static int uvc_video_encode_data(struct uvc_streaming *stream,
struct uvc_buffer *buf, __u8 *data, int len)
{
- struct uvc_video_queue *queue = &video->queue;
+ struct uvc_video_queue *queue = &stream->queue;
unsigned int nbytes;
void *mem;
/* Copy video data to the URB buffer. */
mem = queue->mem + buf->buf.m.offset + queue->buf_used;
nbytes = min((unsigned int)len, buf->buf.bytesused - queue->buf_used);
- nbytes = min(video->bulk.max_payload_size - video->bulk.payload_size,
+ nbytes = min(stream->bulk.max_payload_size - stream->bulk.payload_size,
nbytes);
memcpy(data, mem, nbytes);
/*
* Completion handler for video URBs.
*/
-static void uvc_video_decode_isoc(struct urb *urb,
- struct uvc_video_device *video, struct uvc_buffer *buf)
+static void uvc_video_decode_isoc(struct urb *urb, struct uvc_streaming *stream,
+ struct uvc_buffer *buf)
{
u8 *mem;
int ret, i;
/* Decode the payload header. */
mem = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
do {
- ret = uvc_video_decode_start(video, buf, mem,
+ ret = uvc_video_decode_start(stream, buf, mem,
urb->iso_frame_desc[i].actual_length);
if (ret == -EAGAIN)
- buf = uvc_queue_next_buffer(&video->queue, buf);
+ buf = uvc_queue_next_buffer(&stream->queue,
+ buf);
} while (ret == -EAGAIN);
if (ret < 0)
continue;
/* Decode the payload data. */
- uvc_video_decode_data(video, buf, mem + ret,
+ uvc_video_decode_data(stream, buf, mem + ret,
urb->iso_frame_desc[i].actual_length - ret);
/* Process the header again. */
- uvc_video_decode_end(video, buf, mem,
+ uvc_video_decode_end(stream, buf, mem,
urb->iso_frame_desc[i].actual_length);
if (buf->state == UVC_BUF_STATE_DONE ||
buf->state == UVC_BUF_STATE_ERROR)
- buf = uvc_queue_next_buffer(&video->queue, buf);
+ buf = uvc_queue_next_buffer(&stream->queue, buf);
}
}
-static void uvc_video_decode_bulk(struct urb *urb,
- struct uvc_video_device *video, struct uvc_buffer *buf)
+static void uvc_video_decode_bulk(struct urb *urb, struct uvc_streaming *stream,
+ struct uvc_buffer *buf)
{
u8 *mem;
int len, ret;
mem = urb->transfer_buffer;
len = urb->actual_length;
- video->bulk.payload_size += len;
+ stream->bulk.payload_size += len;
/* If the URB is the first of its payload, decode and save the
* header.
*/
- if (video->bulk.header_size == 0 && !video->bulk.skip_payload) {
+ if (stream->bulk.header_size == 0 && !stream->bulk.skip_payload) {
do {
- ret = uvc_video_decode_start(video, buf, mem, len);
+ ret = uvc_video_decode_start(stream, buf, mem, len);
if (ret == -EAGAIN)
- buf = uvc_queue_next_buffer(&video->queue, buf);
+ buf = uvc_queue_next_buffer(&stream->queue,
+ buf);
} while (ret == -EAGAIN);
/* If an error occured skip the rest of the payload. */
if (ret < 0 || buf == NULL) {
- video->bulk.skip_payload = 1;
+ stream->bulk.skip_payload = 1;
} else {
- memcpy(video->bulk.header, mem, ret);
- video->bulk.header_size = ret;
+ memcpy(stream->bulk.header, mem, ret);
+ stream->bulk.header_size = ret;
mem += ret;
len -= ret;
*/
/* Process video data. */
- if (!video->bulk.skip_payload && buf != NULL)
- uvc_video_decode_data(video, buf, mem, len);
+ if (!stream->bulk.skip_payload && buf != NULL)
+ uvc_video_decode_data(stream, buf, mem, len);
/* Detect the payload end by a URB smaller than the maximum size (or
* a payload size equal to the maximum) and process the header again.
*/
if (urb->actual_length < urb->transfer_buffer_length ||
- video->bulk.payload_size >= video->bulk.max_payload_size) {
- if (!video->bulk.skip_payload && buf != NULL) {
- uvc_video_decode_end(video, buf, video->bulk.header,
- video->bulk.payload_size);
+ stream->bulk.payload_size >= stream->bulk.max_payload_size) {
+ if (!stream->bulk.skip_payload && buf != NULL) {
+ uvc_video_decode_end(stream, buf, stream->bulk.header,
+ stream->bulk.payload_size);
if (buf->state == UVC_BUF_STATE_DONE ||
buf->state == UVC_BUF_STATE_ERROR)
- buf = uvc_queue_next_buffer(&video->queue, buf);
+ buf = uvc_queue_next_buffer(&stream->queue,
+ buf);
}
- video->bulk.header_size = 0;
- video->bulk.skip_payload = 0;
- video->bulk.payload_size = 0;
+ stream->bulk.header_size = 0;
+ stream->bulk.skip_payload = 0;
+ stream->bulk.payload_size = 0;
}
}
-static void uvc_video_encode_bulk(struct urb *urb,
- struct uvc_video_device *video, struct uvc_buffer *buf)
+static void uvc_video_encode_bulk(struct urb *urb, struct uvc_streaming *stream,
+ struct uvc_buffer *buf)
{
u8 *mem = urb->transfer_buffer;
- int len = video->urb_size, ret;
+ int len = stream->urb_size, ret;
if (buf == NULL) {
urb->transfer_buffer_length = 0;
}
/* If the URB is the first of its payload, add the header. */
- if (video->bulk.header_size == 0) {
- ret = uvc_video_encode_header(video, buf, mem, len);
- video->bulk.header_size = ret;
- video->bulk.payload_size += ret;
+ if (stream->bulk.header_size == 0) {
+ ret = uvc_video_encode_header(stream, buf, mem, len);
+ stream->bulk.header_size = ret;
+ stream->bulk.payload_size += ret;
mem += ret;
len -= ret;
}
/* Process video data. */
- ret = uvc_video_encode_data(video, buf, mem, len);
+ ret = uvc_video_encode_data(stream, buf, mem, len);
- video->bulk.payload_size += ret;
+ stream->bulk.payload_size += ret;
len -= ret;
- if (buf->buf.bytesused == video->queue.buf_used ||
- video->bulk.payload_size == video->bulk.max_payload_size) {
- if (buf->buf.bytesused == video->queue.buf_used) {
- video->queue.buf_used = 0;
+ if (buf->buf.bytesused == stream->queue.buf_used ||
+ stream->bulk.payload_size == stream->bulk.max_payload_size) {
+ if (buf->buf.bytesused == stream->queue.buf_used) {
+ stream->queue.buf_used = 0;
buf->state = UVC_BUF_STATE_DONE;
- uvc_queue_next_buffer(&video->queue, buf);
- video->last_fid ^= UVC_STREAM_FID;
+ uvc_queue_next_buffer(&stream->queue, buf);
+ stream->last_fid ^= UVC_STREAM_FID;
}
- video->bulk.header_size = 0;
- video->bulk.payload_size = 0;
+ stream->bulk.header_size = 0;
+ stream->bulk.payload_size = 0;
}
- urb->transfer_buffer_length = video->urb_size - len;
+ urb->transfer_buffer_length = stream->urb_size - len;
}
static void uvc_video_complete(struct urb *urb)
{
- struct uvc_video_device *video = urb->context;
- struct uvc_video_queue *queue = &video->queue;
+ struct uvc_streaming *stream = urb->context;
+ struct uvc_video_queue *queue = &stream->queue;
struct uvc_buffer *buf = NULL;
unsigned long flags;
int ret;
"completion handler.\n", urb->status);
case -ENOENT: /* usb_kill_urb() called. */
- if (video->frozen)
+ if (stream->frozen)
return;
case -ECONNRESET: /* usb_unlink_urb() called. */
queue);
spin_unlock_irqrestore(&queue->irqlock, flags);
- video->decode(urb, video, buf);
+ stream->decode(urb, stream, buf);
if ((ret = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
uvc_printk(KERN_ERR, "Failed to resubmit video URB (%d).\n",
/*
* Free transfer buffers.
*/
-static void uvc_free_urb_buffers(struct uvc_video_device *video)
+static void uvc_free_urb_buffers(struct uvc_streaming *stream)
{
unsigned int i;
for (i = 0; i < UVC_URBS; ++i) {
- if (video->urb_buffer[i]) {
- usb_buffer_free(video->dev->udev, video->urb_size,
- video->urb_buffer[i], video->urb_dma[i]);
- video->urb_buffer[i] = NULL;
+ if (stream->urb_buffer[i]) {
+ usb_buffer_free(stream->dev->udev, stream->urb_size,
+ stream->urb_buffer[i], stream->urb_dma[i]);
+ stream->urb_buffer[i] = NULL;
}
}
- video->urb_size = 0;
+ stream->urb_size = 0;
}
/*
*
* Return the number of allocated packets on success or 0 when out of memory.
*/
-static int uvc_alloc_urb_buffers(struct uvc_video_device *video,
+static int uvc_alloc_urb_buffers(struct uvc_streaming *stream,
unsigned int size, unsigned int psize, gfp_t gfp_flags)
{
unsigned int npackets;
unsigned int i;
/* Buffers are already allocated, bail out. */
- if (video->urb_size)
- return video->urb_size / psize;
+ if (stream->urb_size)
+ return stream->urb_size / psize;
/* Compute the number of packets. Bulk endpoints might transfer UVC
* payloads accross multiple URBs.
/* Retry allocations until one succeed. */
for (; npackets > 1; npackets /= 2) {
for (i = 0; i < UVC_URBS; ++i) {
- video->urb_buffer[i] = usb_buffer_alloc(
- video->dev->udev, psize * npackets,
- gfp_flags | __GFP_NOWARN, &video->urb_dma[i]);
- if (!video->urb_buffer[i]) {
- uvc_free_urb_buffers(video);
+ stream->urb_buffer[i] = usb_buffer_alloc(
+ stream->dev->udev, psize * npackets,
+ gfp_flags | __GFP_NOWARN, &stream->urb_dma[i]);
+ if (!stream->urb_buffer[i]) {
+ uvc_free_urb_buffers(stream);
break;
}
}
if (i == UVC_URBS) {
- video->urb_size = psize * npackets;
+ stream->urb_size = psize * npackets;
return npackets;
}
}
/*
* Uninitialize isochronous/bulk URBs and free transfer buffers.
*/
-static void uvc_uninit_video(struct uvc_video_device *video, int free_buffers)
+static void uvc_uninit_video(struct uvc_streaming *stream, int free_buffers)
{
struct urb *urb;
unsigned int i;
for (i = 0; i < UVC_URBS; ++i) {
- if ((urb = video->urb[i]) == NULL)
+ urb = stream->urb[i];
+ if (urb == NULL)
continue;
usb_kill_urb(urb);
usb_free_urb(urb);
- video->urb[i] = NULL;
+ stream->urb[i] = NULL;
}
if (free_buffers)
- uvc_free_urb_buffers(video);
+ uvc_free_urb_buffers(stream);
}
/*
* Initialize isochronous URBs and allocate transfer buffers. The packet size
* is given by the endpoint.
*/
-static int uvc_init_video_isoc(struct uvc_video_device *video,
+static int uvc_init_video_isoc(struct uvc_streaming *stream,
struct usb_host_endpoint *ep, gfp_t gfp_flags)
{
struct urb *urb;
psize = le16_to_cpu(ep->desc.wMaxPacketSize);
psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
- size = video->streaming->ctrl.dwMaxVideoFrameSize;
+ size = stream->ctrl.dwMaxVideoFrameSize;
- npackets = uvc_alloc_urb_buffers(video, size, psize, gfp_flags);
+ npackets = uvc_alloc_urb_buffers(stream, size, psize, gfp_flags);
if (npackets == 0)
return -ENOMEM;
for (i = 0; i < UVC_URBS; ++i) {
urb = usb_alloc_urb(npackets, gfp_flags);
if (urb == NULL) {
- uvc_uninit_video(video, 1);
+ uvc_uninit_video(stream, 1);
return -ENOMEM;
}
- urb->dev = video->dev->udev;
- urb->context = video;
- urb->pipe = usb_rcvisocpipe(video->dev->udev,
+ urb->dev = stream->dev->udev;
+ urb->context = stream;
+ urb->pipe = usb_rcvisocpipe(stream->dev->udev,
ep->desc.bEndpointAddress);
urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
urb->interval = ep->desc.bInterval;
- urb->transfer_buffer = video->urb_buffer[i];
- urb->transfer_dma = video->urb_dma[i];
+ urb->transfer_buffer = stream->urb_buffer[i];
+ urb->transfer_dma = stream->urb_dma[i];
urb->complete = uvc_video_complete;
urb->number_of_packets = npackets;
urb->transfer_buffer_length = size;
urb->iso_frame_desc[j].length = psize;
}
- video->urb[i] = urb;
+ stream->urb[i] = urb;
}
return 0;
* Initialize bulk URBs and allocate transfer buffers. The packet size is
* given by the endpoint.
*/
-static int uvc_init_video_bulk(struct uvc_video_device *video,
+static int uvc_init_video_bulk(struct uvc_streaming *stream,
struct usb_host_endpoint *ep, gfp_t gfp_flags)
{
struct urb *urb;
u32 size;
psize = le16_to_cpu(ep->desc.wMaxPacketSize) & 0x07ff;
- size = video->streaming->ctrl.dwMaxPayloadTransferSize;
- video->bulk.max_payload_size = size;
+ size = stream->ctrl.dwMaxPayloadTransferSize;
+ stream->bulk.max_payload_size = size;
- npackets = uvc_alloc_urb_buffers(video, size, psize, gfp_flags);
+ npackets = uvc_alloc_urb_buffers(stream, size, psize, gfp_flags);
if (npackets == 0)
return -ENOMEM;
size = npackets * psize;
if (usb_endpoint_dir_in(&ep->desc))
- pipe = usb_rcvbulkpipe(video->dev->udev,
+ pipe = usb_rcvbulkpipe(stream->dev->udev,
ep->desc.bEndpointAddress);
else
- pipe = usb_sndbulkpipe(video->dev->udev,
+ pipe = usb_sndbulkpipe(stream->dev->udev,
ep->desc.bEndpointAddress);
- if (video->streaming->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
+ if (stream->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
size = 0;
for (i = 0; i < UVC_URBS; ++i) {
urb = usb_alloc_urb(0, gfp_flags);
if (urb == NULL) {
- uvc_uninit_video(video, 1);
+ uvc_uninit_video(stream, 1);
return -ENOMEM;
}
- usb_fill_bulk_urb(urb, video->dev->udev, pipe,
- video->urb_buffer[i], size, uvc_video_complete,
- video);
+ usb_fill_bulk_urb(urb, stream->dev->udev, pipe,
+ stream->urb_buffer[i], size, uvc_video_complete,
+ stream);
urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
- urb->transfer_dma = video->urb_dma[i];
+ urb->transfer_dma = stream->urb_dma[i];
- video->urb[i] = urb;
+ stream->urb[i] = urb;
}
return 0;
/*
* Initialize isochronous/bulk URBs and allocate transfer buffers.
*/
-static int uvc_init_video(struct uvc_video_device *video, gfp_t gfp_flags)
+static int uvc_init_video(struct uvc_streaming *stream, gfp_t gfp_flags)
{
- struct usb_interface *intf = video->streaming->intf;
+ struct usb_interface *intf = stream->intf;
struct usb_host_interface *alts;
struct usb_host_endpoint *ep = NULL;
- int intfnum = video->streaming->intfnum;
+ int intfnum = stream->intfnum;
unsigned int bandwidth, psize, i;
int ret;
- video->last_fid = -1;
- video->bulk.header_size = 0;
- video->bulk.skip_payload = 0;
- video->bulk.payload_size = 0;
+ stream->last_fid = -1;
+ stream->bulk.header_size = 0;
+ stream->bulk.skip_payload = 0;
+ stream->bulk.payload_size = 0;
if (intf->num_altsetting > 1) {
/* Isochronous endpoint, select the alternate setting. */
- bandwidth = video->streaming->ctrl.dwMaxPayloadTransferSize;
+ bandwidth = stream->ctrl.dwMaxPayloadTransferSize;
if (bandwidth == 0) {
uvc_printk(KERN_WARNING, "device %s requested null "
"bandwidth, defaulting to lowest.\n",
- video->vdev->name);
+ stream->dev->name);
bandwidth = 1;
}
for (i = 0; i < intf->num_altsetting; ++i) {
alts = &intf->altsetting[i];
ep = uvc_find_endpoint(alts,
- video->streaming->header.bEndpointAddress);
+ stream->header.bEndpointAddress);
if (ep == NULL)
continue;
if (i >= intf->num_altsetting)
return -EIO;
- if ((ret = usb_set_interface(video->dev->udev, intfnum, i)) < 0)
+ ret = usb_set_interface(stream->dev->udev, intfnum, i);
+ if (ret < 0)
return ret;
- ret = uvc_init_video_isoc(video, ep, gfp_flags);
+ ret = uvc_init_video_isoc(stream, ep, gfp_flags);
} else {
/* Bulk endpoint, proceed to URB initialization. */
ep = uvc_find_endpoint(&intf->altsetting[0],
- video->streaming->header.bEndpointAddress);
+ stream->header.bEndpointAddress);
if (ep == NULL)
return -EIO;
- ret = uvc_init_video_bulk(video, ep, gfp_flags);
+ ret = uvc_init_video_bulk(stream, ep, gfp_flags);
}
if (ret < 0)
/* Submit the URBs. */
for (i = 0; i < UVC_URBS; ++i) {
- if ((ret = usb_submit_urb(video->urb[i], gfp_flags)) < 0) {
+ ret = usb_submit_urb(stream->urb[i], gfp_flags);
+ if (ret < 0) {
uvc_printk(KERN_ERR, "Failed to submit URB %u "
"(%d).\n", i, ret);
- uvc_uninit_video(video, 1);
+ uvc_uninit_video(stream, 1);
return ret;
}
}
* video buffers in any way. We mark the device as frozen to make sure the URB
* completion handler won't try to cancel the queue when we kill the URBs.
*/
-int uvc_video_suspend(struct uvc_video_device *video)
+int uvc_video_suspend(struct uvc_streaming *stream)
{
- if (!uvc_queue_streaming(&video->queue))
+ if (!uvc_queue_streaming(&stream->queue))
return 0;
- video->frozen = 1;
- uvc_uninit_video(video, 0);
- usb_set_interface(video->dev->udev, video->streaming->intfnum, 0);
+ stream->frozen = 1;
+ uvc_uninit_video(stream, 0);
+ usb_set_interface(stream->dev->udev, stream->intfnum, 0);
return 0;
}
* buffers, making sure userspace applications are notified of the problem
* instead of waiting forever.
*/
-int uvc_video_resume(struct uvc_video_device *video)
+int uvc_video_resume(struct uvc_streaming *stream)
{
int ret;
- video->frozen = 0;
+ stream->frozen = 0;
- if ((ret = uvc_commit_video(video, &video->streaming->ctrl)) < 0) {
- uvc_queue_enable(&video->queue, 0);
+ ret = uvc_commit_video(stream, &stream->ctrl);
+ if (ret < 0) {
+ uvc_queue_enable(&stream->queue, 0);
return ret;
}
- if (!uvc_queue_streaming(&video->queue))
+ if (!uvc_queue_streaming(&stream->queue))
return 0;
- if ((ret = uvc_init_video(video, GFP_NOIO)) < 0)
- uvc_queue_enable(&video->queue, 0);
+ ret = uvc_init_video(stream, GFP_NOIO);
+ if (ret < 0)
+ uvc_queue_enable(&stream->queue, 0);
return ret;
}
*
* This function is called before registering the device with V4L.
*/
-int uvc_video_init(struct uvc_video_device *video)
+int uvc_video_init(struct uvc_streaming *stream)
{
- struct uvc_streaming_control *probe = &video->streaming->ctrl;
+ struct uvc_streaming_control *probe = &stream->ctrl;
struct uvc_format *format = NULL;
struct uvc_frame *frame = NULL;
unsigned int i;
int ret;
- if (video->streaming->nformats == 0) {
+ if (stream->nformats == 0) {
uvc_printk(KERN_INFO, "No supported video formats found.\n");
return -EINVAL;
}
+ atomic_set(&stream->active, 0);
+
+ /* Initialize the video buffers queue. */
+ uvc_queue_init(&stream->queue, stream->type);
+
/* Alternate setting 0 should be the default, yet the XBox Live Vision
* Cam (and possibly other devices) crash or otherwise misbehave if
* they don't receive a SET_INTERFACE request before any other video
* control request.
*/
- usb_set_interface(video->dev->udev, video->streaming->intfnum, 0);
+ usb_set_interface(stream->dev->udev, stream->intfnum, 0);
/* Set the streaming probe control with default streaming parameters
* retrieved from the device. Webcams that don't suport GET_DEF
* requests on the probe control will just keep their current streaming
* parameters.
*/
- if (uvc_get_video_ctrl(video, probe, 1, UVC_GET_DEF) == 0)
- uvc_set_video_ctrl(video, probe, 1);
+ if (uvc_get_video_ctrl(stream, probe, 1, UVC_GET_DEF) == 0)
+ uvc_set_video_ctrl(stream, probe, 1);
/* Initialize the streaming parameters with the probe control current
* value. This makes sure SET_CUR requests on the streaming commit
* control will always use values retrieved from a successful GET_CUR
* request on the probe control, as required by the UVC specification.
*/
- ret = uvc_get_video_ctrl(video, probe, 1, UVC_GET_CUR);
+ ret = uvc_get_video_ctrl(stream, probe, 1, UVC_GET_CUR);
if (ret < 0)
return ret;
/* Check if the default format descriptor exists. Use the first
* available format otherwise.
*/
- for (i = video->streaming->nformats; i > 0; --i) {
- format = &video->streaming->format[i-1];
+ for (i = stream->nformats; i > 0; --i) {
+ format = &stream->format[i-1];
if (format->index == probe->bFormatIndex)
break;
}
probe->bFormatIndex = format->index;
probe->bFrameIndex = frame->bFrameIndex;
- video->streaming->cur_format = format;
- video->streaming->cur_frame = frame;
- atomic_set(&video->active, 0);
+ stream->cur_format = format;
+ stream->cur_frame = frame;
/* Select the video decoding function */
- if (video->streaming->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
- if (video->dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)
- video->decode = uvc_video_decode_isight;
- else if (video->streaming->intf->num_altsetting > 1)
- video->decode = uvc_video_decode_isoc;
+ if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+ if (stream->dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)
+ stream->decode = uvc_video_decode_isight;
+ else if (stream->intf->num_altsetting > 1)
+ stream->decode = uvc_video_decode_isoc;
else
- video->decode = uvc_video_decode_bulk;
+ stream->decode = uvc_video_decode_bulk;
} else {
- if (video->streaming->intf->num_altsetting == 1)
- video->decode = uvc_video_encode_bulk;
+ if (stream->intf->num_altsetting == 1)
+ stream->decode = uvc_video_encode_bulk;
else {
uvc_printk(KERN_INFO, "Isochronous endpoints are not "
"supported for video output devices.\n");
/*
* Enable or disable the video stream.
*/
-int uvc_video_enable(struct uvc_video_device *video, int enable)
+int uvc_video_enable(struct uvc_streaming *stream, int enable)
{
int ret;
if (!enable) {
- uvc_uninit_video(video, 1);
- usb_set_interface(video->dev->udev,
- video->streaming->intfnum, 0);
- uvc_queue_enable(&video->queue, 0);
+ uvc_uninit_video(stream, 1);
+ usb_set_interface(stream->dev->udev, stream->intfnum, 0);
+ uvc_queue_enable(&stream->queue, 0);
return 0;
}
- if ((video->streaming->cur_format->flags & UVC_FMT_FLAG_COMPRESSED) ||
+ if ((stream->cur_format->flags & UVC_FMT_FLAG_COMPRESSED) ||
uvc_no_drop_param)
- video->queue.flags &= ~UVC_QUEUE_DROP_INCOMPLETE;
+ stream->queue.flags &= ~UVC_QUEUE_DROP_INCOMPLETE;
else
- video->queue.flags |= UVC_QUEUE_DROP_INCOMPLETE;
+ stream->queue.flags |= UVC_QUEUE_DROP_INCOMPLETE;
- if ((ret = uvc_queue_enable(&video->queue, 1)) < 0)
+ ret = uvc_queue_enable(&stream->queue, 1);
+ if (ret < 0)
return ret;
/* Commit the streaming parameters. */
- if ((ret = uvc_commit_video(video, &video->streaming->ctrl)) < 0)
+ ret = uvc_commit_video(stream, &stream->ctrl);
+ if (ret < 0)
return ret;
- return uvc_init_video(video, GFP_KERNEL);
+ return uvc_init_video(stream, GFP_KERNEL);
}
git://bbs.cooldavid.org / net-next-2.6.git / commitdiff