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path: root/drivers/media/video/uvc/uvc_v4l2.c
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Diffstat (limited to 'drivers/media/video/uvc/uvc_v4l2.c')
-rw-r--r--drivers/media/video/uvc/uvc_v4l2.c195
1 files changed, 102 insertions, 93 deletions
diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c
index 87cb9cc75af2..7e847bbaf2a4 100644
--- a/drivers/media/video/uvc/uvc_v4l2.c
+++ b/drivers/media/video/uvc/uvc_v4l2.c
@@ -103,7 +103,7 @@ static __u32 uvc_try_frame_interval(struct uvc_frame *frame, __u32 interval)
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)
{
@@ -116,7 +116,7 @@ static int uvc_v4l2_try_format(struct uvc_video_device *video,
int ret = 0;
__u8 *fcc;
- if (fmt->type != video->streaming->type)
+ if (fmt->type != stream->type)
return -EINVAL;
fcc = (__u8 *)&fmt->fmt.pix.pixelformat;
@@ -126,8 +126,8 @@ static int uvc_v4l2_try_format(struct uvc_video_device *video,
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;
}
@@ -191,12 +191,13 @@ static int uvc_v4l2_try_format(struct uvc_video_device *video,
* 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;
@@ -216,13 +217,13 @@ done:
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)
@@ -233,14 +234,14 @@ static int uvc_v4l2_get_format(struct uvc_video_device *video,
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;
@@ -248,39 +249,39 @@ static int uvc_v4l2_set_format(struct uvc_video_device *video,
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;
@@ -297,19 +298,19 @@ static int uvc_v4l2_get_streamparm(struct uvc_video_device *video,
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)
@@ -317,7 +318,7 @@ static int uvc_v4l2_set_streamparm(struct uvc_video_device *video,
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);
@@ -326,10 +327,11 @@ static int uvc_v4l2_set_streamparm(struct uvc_video_device *video,
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;
@@ -382,8 +384,8 @@ static int uvc_acquire_privileges(struct uvc_fh *handle)
/* 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;
}
@@ -398,7 +400,7 @@ 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;
}
@@ -414,45 +416,47 @@ static int uvc_has_privileges(struct uvc_fh *handle)
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);
@@ -461,20 +465,20 @@ done:
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. */
@@ -482,19 +486,20 @@ static int uvc_v4l2_release(struct file *file)
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) {
@@ -506,10 +511,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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
@@ -703,15 +708,15 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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;
@@ -729,17 +734,17 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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:
@@ -750,10 +755,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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;
}
}
@@ -779,10 +784,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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;
}
}
@@ -832,21 +837,21 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
/* 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;
@@ -870,16 +875,16 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
{
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;
@@ -892,39 +897,40 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
{
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;
}
@@ -933,13 +939,13 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
{
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. */
@@ -1070,7 +1076,9 @@ static struct vm_operations_struct uvc_vm_ops = {
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;
@@ -1082,15 +1090,15 @@ static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
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;
}
@@ -1101,7 +1109,7 @@ static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
*/
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)
@@ -1117,17 +1125,18 @@ static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
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 = {
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-14 19:46:16 +0000