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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/media/usb/uvc/uvc_v4l2.c
Initial import
Diffstat (limited to 'drivers/media/usb/uvc/uvc_v4l2.c')
-rw-r--r--drivers/media/usb/uvc/uvc_v4l2.c1521
1 files changed, 1521 insertions, 0 deletions
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
new file mode 100644
index 000000000..c4b1ac675
--- /dev/null
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -0,0 +1,1521 @@
+/*
+ * uvc_v4l2.c -- USB Video Class driver - V4L2 API
+ *
+ * Copyright (C) 2005-2010
+ * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ *
+ * 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.
+ *
+ */
+
+#include <linux/compat.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/videodev2.h>
+#include <linux/vmalloc.h>
+#include <linux/mm.h>
+#include <linux/wait.h>
+#include <linux/atomic.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+
+#include "uvcvideo.h"
+
+/* ------------------------------------------------------------------------
+ * UVC ioctls
+ */
+static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain,
+ struct uvc_xu_control_mapping *xmap)
+{
+ struct uvc_control_mapping *map;
+ unsigned int size;
+ int ret;
+
+ map = kzalloc(sizeof *map, GFP_KERNEL);
+ if (map == NULL)
+ return -ENOMEM;
+
+ map->id = xmap->id;
+ memcpy(map->name, xmap->name, sizeof map->name);
+ memcpy(map->entity, xmap->entity, sizeof map->entity);
+ map->selector = xmap->selector;
+ map->size = xmap->size;
+ map->offset = xmap->offset;
+ map->v4l2_type = xmap->v4l2_type;
+ map->data_type = xmap->data_type;
+
+ switch (xmap->v4l2_type) {
+ case V4L2_CTRL_TYPE_INTEGER:
+ case V4L2_CTRL_TYPE_BOOLEAN:
+ case V4L2_CTRL_TYPE_BUTTON:
+ break;
+
+ case V4L2_CTRL_TYPE_MENU:
+ /* Prevent excessive memory consumption, as well as integer
+ * overflows.
+ */
+ if (xmap->menu_count == 0 ||
+ xmap->menu_count > UVC_MAX_CONTROL_MENU_ENTRIES) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ size = xmap->menu_count * sizeof(*map->menu_info);
+ map->menu_info = kmalloc(size, GFP_KERNEL);
+ if (map->menu_info == NULL) {
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ if (copy_from_user(map->menu_info, xmap->menu_info, size)) {
+ ret = -EFAULT;
+ goto done;
+ }
+
+ map->menu_count = xmap->menu_count;
+ break;
+
+ default:
+ uvc_trace(UVC_TRACE_CONTROL, "Unsupported V4L2 control type "
+ "%u.\n", xmap->v4l2_type);
+ ret = -ENOTTY;
+ goto done;
+ }
+
+ ret = uvc_ctrl_add_mapping(chain, map);
+
+done:
+ kfree(map->menu_info);
+ kfree(map);
+
+ return ret;
+}
+
+/* ------------------------------------------------------------------------
+ * V4L2 interface
+ */
+
+/*
+ * Find the frame interval closest to the requested frame interval for the
+ * given frame format and size. This should be done by the device as part of
+ * the Video Probe and Commit negotiation, but some hardware don't implement
+ * that feature.
+ */
+static __u32 uvc_try_frame_interval(struct uvc_frame *frame, __u32 interval)
+{
+ unsigned int i;
+
+ if (frame->bFrameIntervalType) {
+ __u32 best = -1, dist;
+
+ for (i = 0; i < frame->bFrameIntervalType; ++i) {
+ dist = interval > frame->dwFrameInterval[i]
+ ? interval - frame->dwFrameInterval[i]
+ : frame->dwFrameInterval[i] - interval;
+
+ if (dist > best)
+ break;
+
+ best = dist;
+ }
+
+ interval = frame->dwFrameInterval[i-1];
+ } else {
+ const __u32 min = frame->dwFrameInterval[0];
+ const __u32 max = frame->dwFrameInterval[1];
+ const __u32 step = frame->dwFrameInterval[2];
+
+ interval = min + (interval - min + step/2) / step * step;
+ if (interval > max)
+ interval = max;
+ }
+
+ return interval;
+}
+
+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)
+{
+ struct uvc_format *format = NULL;
+ struct uvc_frame *frame = NULL;
+ __u16 rw, rh;
+ unsigned int d, maxd;
+ unsigned int i;
+ __u32 interval;
+ int ret = 0;
+ __u8 *fcc;
+
+ if (fmt->type != stream->type)
+ return -EINVAL;
+
+ fcc = (__u8 *)&fmt->fmt.pix.pixelformat;
+ uvc_trace(UVC_TRACE_FORMAT, "Trying format 0x%08x (%c%c%c%c): %ux%u.\n",
+ fmt->fmt.pix.pixelformat,
+ fcc[0], fcc[1], fcc[2], fcc[3],
+ fmt->fmt.pix.width, fmt->fmt.pix.height);
+
+ /* Check if the hardware supports the requested format, use the default
+ * format otherwise.
+ */
+ for (i = 0; i < stream->nformats; ++i) {
+ format = &stream->format[i];
+ if (format->fcc == fmt->fmt.pix.pixelformat)
+ break;
+ }
+
+ if (i == stream->nformats) {
+ format = stream->def_format;
+ fmt->fmt.pix.pixelformat = format->fcc;
+ }
+
+ /* Find the closest image size. The distance between image sizes is
+ * the size in pixels of the non-overlapping regions between the
+ * requested size and the frame-specified size.
+ */
+ rw = fmt->fmt.pix.width;
+ rh = fmt->fmt.pix.height;
+ maxd = (unsigned int)-1;
+
+ for (i = 0; i < format->nframes; ++i) {
+ __u16 w = format->frame[i].wWidth;
+ __u16 h = format->frame[i].wHeight;
+
+ d = min(w, rw) * min(h, rh);
+ d = w*h + rw*rh - 2*d;
+ if (d < maxd) {
+ maxd = d;
+ frame = &format->frame[i];
+ }
+
+ if (maxd == 0)
+ break;
+ }
+
+ if (frame == NULL) {
+ uvc_trace(UVC_TRACE_FORMAT, "Unsupported size %ux%u.\n",
+ fmt->fmt.pix.width, fmt->fmt.pix.height);
+ return -EINVAL;
+ }
+
+ /* Use the default frame interval. */
+ interval = frame->dwDefaultFrameInterval;
+ uvc_trace(UVC_TRACE_FORMAT, "Using default frame interval %u.%u us "
+ "(%u.%u fps).\n", interval/10, interval%10, 10000000/interval,
+ (100000000/interval)%10);
+
+ /* Set the format index, frame index and frame interval. */
+ memset(probe, 0, sizeof *probe);
+ probe->bmHint = 1; /* dwFrameInterval */
+ probe->bFormatIndex = format->index;
+ probe->bFrameIndex = frame->bFrameIndex;
+ probe->dwFrameInterval = uvc_try_frame_interval(frame, interval);
+ /* Some webcams stall the probe control set request when the
+ * dwMaxVideoFrameSize field is set to zero. The UVC specification
+ * clearly states that the field is read-only from the host, so this
+ * is a webcam bug. Set dwMaxVideoFrameSize to the value reported by
+ * the webcam to work around the problem.
+ *
+ * The workaround could probably be enabled for all webcams, so the
+ * quirk can be removed if needed. It's currently useful to detect
+ * webcam bugs and fix them before they hit the market (providing
+ * developers test their webcams with the Linux driver as well as with
+ * the Windows driver).
+ */
+ mutex_lock(&stream->mutex);
+ if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS)
+ probe->dwMaxVideoFrameSize =
+ stream->ctrl.dwMaxVideoFrameSize;
+
+ /* Probe the device. */
+ ret = uvc_probe_video(stream, probe);
+ mutex_unlock(&stream->mutex);
+ if (ret < 0)
+ goto done;
+
+ fmt->fmt.pix.width = frame->wWidth;
+ 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 = probe->dwMaxVideoFrameSize;
+ fmt->fmt.pix.colorspace = format->colorspace;
+ fmt->fmt.pix.priv = 0;
+
+ if (uvc_format != NULL)
+ *uvc_format = format;
+ if (uvc_frame != NULL)
+ *uvc_frame = frame;
+
+done:
+ return ret;
+}
+
+static int uvc_v4l2_get_format(struct uvc_streaming *stream,
+ struct v4l2_format *fmt)
+{
+ struct uvc_format *format;
+ struct uvc_frame *frame;
+ int ret = 0;
+
+ if (fmt->type != stream->type)
+ return -EINVAL;
+
+ mutex_lock(&stream->mutex);
+ format = stream->cur_format;
+ frame = stream->cur_frame;
+
+ if (format == NULL || frame == NULL) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ fmt->fmt.pix.pixelformat = format->fcc;
+ fmt->fmt.pix.width = frame->wWidth;
+ 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 = stream->ctrl.dwMaxVideoFrameSize;
+ fmt->fmt.pix.colorspace = format->colorspace;
+ fmt->fmt.pix.priv = 0;
+
+done:
+ mutex_unlock(&stream->mutex);
+ return ret;
+}
+
+static int uvc_v4l2_set_format(struct uvc_streaming *stream,
+ struct v4l2_format *fmt)
+{
+ struct uvc_streaming_control probe;
+ struct uvc_format *format;
+ struct uvc_frame *frame;
+ int ret;
+
+ if (fmt->type != stream->type)
+ return -EINVAL;
+
+ ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&stream->mutex);
+
+ if (uvc_queue_allocated(&stream->queue)) {
+ ret = -EBUSY;
+ goto done;
+ }
+
+ stream->ctrl = probe;
+ stream->cur_format = format;
+ stream->cur_frame = frame;
+
+done:
+ mutex_unlock(&stream->mutex);
+ return ret;
+}
+
+static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream,
+ struct v4l2_streamparm *parm)
+{
+ uint32_t numerator, denominator;
+
+ if (parm->type != stream->type)
+ return -EINVAL;
+
+ mutex_lock(&stream->mutex);
+ numerator = stream->ctrl.dwFrameInterval;
+ mutex_unlock(&stream->mutex);
+
+ denominator = 10000000;
+ uvc_simplify_fraction(&numerator, &denominator, 8, 333);
+
+ memset(parm, 0, sizeof *parm);
+ parm->type = stream->type;
+
+ 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;
+ parm->parm.capture.timeperframe.denominator = denominator;
+ parm->parm.capture.extendedmode = 0;
+ parm->parm.capture.readbuffers = 0;
+ } else {
+ parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
+ parm->parm.output.outputmode = 0;
+ parm->parm.output.timeperframe.numerator = numerator;
+ parm->parm.output.timeperframe.denominator = denominator;
+ }
+
+ return 0;
+}
+
+static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
+ struct v4l2_streamparm *parm)
+{
+ struct uvc_streaming_control probe;
+ struct v4l2_fract timeperframe;
+ uint32_t interval;
+ int ret;
+
+ if (parm->type != stream->type)
+ return -EINVAL;
+
+ if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ timeperframe = parm->parm.capture.timeperframe;
+ else
+ timeperframe = parm->parm.output.timeperframe;
+
+ interval = uvc_fraction_to_interval(timeperframe.numerator,
+ timeperframe.denominator);
+ uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n",
+ timeperframe.numerator, timeperframe.denominator, interval);
+
+ mutex_lock(&stream->mutex);
+
+ if (uvc_queue_streaming(&stream->queue)) {
+ mutex_unlock(&stream->mutex);
+ return -EBUSY;
+ }
+
+ probe = stream->ctrl;
+ probe.dwFrameInterval =
+ uvc_try_frame_interval(stream->cur_frame, interval);
+
+ /* Probe the device with the new settings. */
+ ret = uvc_probe_video(stream, &probe);
+ if (ret < 0) {
+ mutex_unlock(&stream->mutex);
+ return ret;
+ }
+
+ stream->ctrl = probe;
+ mutex_unlock(&stream->mutex);
+
+ /* Return the actual frame period. */
+ timeperframe.numerator = probe.dwFrameInterval;
+ timeperframe.denominator = 10000000;
+ uvc_simplify_fraction(&timeperframe.numerator,
+ &timeperframe.denominator, 8, 333);
+
+ if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ parm->parm.capture.timeperframe = timeperframe;
+ else
+ parm->parm.output.timeperframe = timeperframe;
+
+ return 0;
+}
+
+/* ------------------------------------------------------------------------
+ * Privilege management
+ */
+
+/*
+ * Privilege management is the multiple-open implementation basis. The current
+ * implementation is completely transparent for the end-user and doesn't
+ * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls.
+ * Those ioctls enable finer control on the device (by making possible for a
+ * user to request exclusive access to a device), but are not mature yet.
+ * Switching to the V4L2 priority mechanism might be considered in the future
+ * if this situation changes.
+ *
+ * Each open instance of a UVC device can either be in a privileged or
+ * unprivileged state. Only a single instance can be in a privileged state at
+ * a given time. Trying to perform an operation that requires privileges will
+ * automatically acquire the required privileges if possible, or return -EBUSY
+ * otherwise. Privileges are dismissed when closing the instance or when
+ * freeing the video buffers using VIDIOC_REQBUFS.
+ *
+ * Operations that require privileges are:
+ *
+ * - VIDIOC_S_INPUT
+ * - VIDIOC_S_PARM
+ * - VIDIOC_S_FMT
+ * - VIDIOC_REQBUFS
+ */
+static int uvc_acquire_privileges(struct uvc_fh *handle)
+{
+ /* Always succeed if the handle is already privileged. */
+ if (handle->state == UVC_HANDLE_ACTIVE)
+ return 0;
+
+ /* Check if the device already has a privileged handle. */
+ if (atomic_inc_return(&handle->stream->active) != 1) {
+ atomic_dec(&handle->stream->active);
+ return -EBUSY;
+ }
+
+ handle->state = UVC_HANDLE_ACTIVE;
+ return 0;
+}
+
+static void uvc_dismiss_privileges(struct uvc_fh *handle)
+{
+ if (handle->state == UVC_HANDLE_ACTIVE)
+ atomic_dec(&handle->stream->active);
+
+ handle->state = UVC_HANDLE_PASSIVE;
+}
+
+static int uvc_has_privileges(struct uvc_fh *handle)
+{
+ return handle->state == UVC_HANDLE_ACTIVE;
+}
+
+/* ------------------------------------------------------------------------
+ * V4L2 file operations
+ */
+
+static int uvc_v4l2_open(struct file *file)
+{
+ struct uvc_streaming *stream;
+ struct uvc_fh *handle;
+ int ret = 0;
+
+ uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n");
+ stream = video_drvdata(file);
+
+ if (stream->dev->state & UVC_DEV_DISCONNECTED)
+ return -ENODEV;
+
+ ret = usb_autopm_get_interface(stream->dev->intf);
+ if (ret < 0)
+ return ret;
+
+ /* Create the device handle. */
+ handle = kzalloc(sizeof *handle, GFP_KERNEL);
+ if (handle == NULL) {
+ usb_autopm_put_interface(stream->dev->intf);
+ return -ENOMEM;
+ }
+
+ mutex_lock(&stream->dev->lock);
+ if (stream->dev->users == 0) {
+ ret = uvc_status_start(stream->dev, GFP_KERNEL);
+ if (ret < 0) {
+ mutex_unlock(&stream->dev->lock);
+ usb_autopm_put_interface(stream->dev->intf);
+ kfree(handle);
+ return ret;
+ }
+ }
+
+ stream->dev->users++;
+ mutex_unlock(&stream->dev->lock);
+
+ v4l2_fh_init(&handle->vfh, &stream->vdev);
+ v4l2_fh_add(&handle->vfh);
+ handle->chain = stream->chain;
+ handle->stream = stream;
+ handle->state = UVC_HANDLE_PASSIVE;
+ file->private_data = handle;
+
+ return 0;
+}
+
+static int uvc_v4l2_release(struct file *file)
+{
+ struct uvc_fh *handle = 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_queue_release(&stream->queue);
+
+ /* Release the file handle. */
+ uvc_dismiss_privileges(handle);
+ v4l2_fh_del(&handle->vfh);
+ v4l2_fh_exit(&handle->vfh);
+ kfree(handle);
+ file->private_data = NULL;
+
+ mutex_lock(&stream->dev->lock);
+ if (--stream->dev->users == 0)
+ uvc_status_stop(stream->dev);
+ mutex_unlock(&stream->dev->lock);
+
+ usb_autopm_put_interface(stream->dev->intf);
+ return 0;
+}
+
+static int uvc_ioctl_querycap(struct file *file, void *fh,
+ struct v4l2_capability *cap)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct uvc_fh *handle = file->private_data;
+ struct uvc_video_chain *chain = handle->chain;
+ struct uvc_streaming *stream = handle->stream;
+
+ strlcpy(cap->driver, "uvcvideo", sizeof(cap->driver));
+ strlcpy(cap->card, vdev->name, sizeof(cap->card));
+ usb_make_path(stream->dev->udev, cap->bus_info, sizeof(cap->bus_info));
+ cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
+ | chain->caps;
+ if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+ else
+ cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
+
+ return 0;
+}
+
+static int uvc_ioctl_enum_fmt(struct uvc_streaming *stream,
+ struct v4l2_fmtdesc *fmt)
+{
+ struct uvc_format *format;
+ enum v4l2_buf_type type = fmt->type;
+ __u32 index = fmt->index;
+
+ if (fmt->type != stream->type || fmt->index >= stream->nformats)
+ return -EINVAL;
+
+ memset(fmt, 0, sizeof(*fmt));
+ fmt->index = index;
+ fmt->type = type;
+
+ format = &stream->format[fmt->index];
+ fmt->flags = 0;
+ if (format->flags & UVC_FMT_FLAG_COMPRESSED)
+ fmt->flags |= V4L2_FMT_FLAG_COMPRESSED;
+ strlcpy(fmt->description, format->name, sizeof(fmt->description));
+ fmt->description[sizeof(fmt->description) - 1] = 0;
+ fmt->pixelformat = format->fcc;
+ return 0;
+}
+
+static int uvc_ioctl_enum_fmt_vid_cap(struct file *file, void *fh,
+ struct v4l2_fmtdesc *fmt)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+
+ return uvc_ioctl_enum_fmt(stream, fmt);
+}
+
+static int uvc_ioctl_enum_fmt_vid_out(struct file *file, void *fh,
+ struct v4l2_fmtdesc *fmt)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+
+ return uvc_ioctl_enum_fmt(stream, fmt);
+}
+
+static int uvc_ioctl_g_fmt_vid_cap(struct file *file, void *fh,
+ struct v4l2_format *fmt)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+
+ return uvc_v4l2_get_format(stream, fmt);
+}
+
+static int uvc_ioctl_g_fmt_vid_out(struct file *file, void *fh,
+ struct v4l2_format *fmt)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+
+ return uvc_v4l2_get_format(stream, fmt);
+}
+
+static int uvc_ioctl_s_fmt_vid_cap(struct file *file, void *fh,
+ struct v4l2_format *fmt)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+ int ret;
+
+ ret = uvc_acquire_privileges(handle);
+ if (ret < 0)
+ return ret;
+
+ return uvc_v4l2_set_format(stream, fmt);
+}
+
+static int uvc_ioctl_s_fmt_vid_out(struct file *file, void *fh,
+ struct v4l2_format *fmt)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+ int ret;
+
+ ret = uvc_acquire_privileges(handle);
+ if (ret < 0)
+ return ret;
+
+ return uvc_v4l2_set_format(stream, fmt);
+}
+
+static int uvc_ioctl_try_fmt_vid_cap(struct file *file, void *fh,
+ struct v4l2_format *fmt)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+ struct uvc_streaming_control probe;
+
+ return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL);
+}
+
+static int uvc_ioctl_try_fmt_vid_out(struct file *file, void *fh,
+ struct v4l2_format *fmt)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+ struct uvc_streaming_control probe;
+
+ return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL);
+}
+
+static int uvc_ioctl_reqbufs(struct file *file, void *fh,
+ struct v4l2_requestbuffers *rb)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+ int ret;
+
+ ret = uvc_acquire_privileges(handle);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&stream->mutex);
+ ret = uvc_request_buffers(&stream->queue, rb);
+ mutex_unlock(&stream->mutex);
+ if (ret < 0)
+ return ret;
+
+ if (ret == 0)
+ uvc_dismiss_privileges(handle);
+
+ return 0;
+}
+
+static int uvc_ioctl_querybuf(struct file *file, void *fh,
+ struct v4l2_buffer *buf)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+
+ if (!uvc_has_privileges(handle))
+ return -EBUSY;
+
+ return uvc_query_buffer(&stream->queue, buf);
+}
+
+static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+
+ if (!uvc_has_privileges(handle))
+ return -EBUSY;
+
+ return uvc_queue_buffer(&stream->queue, buf);
+}
+
+static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+
+ if (!uvc_has_privileges(handle))
+ return -EBUSY;
+
+ return uvc_dequeue_buffer(&stream->queue, buf,
+ file->f_flags & O_NONBLOCK);
+}
+
+static int uvc_ioctl_create_bufs(struct file *file, void *fh,
+ struct v4l2_create_buffers *cb)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+ int ret;
+
+ ret = uvc_acquire_privileges(handle);
+ if (ret < 0)
+ return ret;
+
+ return uvc_create_buffers(&stream->queue, cb);
+}
+
+static int uvc_ioctl_streamon(struct file *file, void *fh,
+ enum v4l2_buf_type type)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+ int ret;
+
+ if (!uvc_has_privileges(handle))
+ return -EBUSY;
+
+ mutex_lock(&stream->mutex);
+ ret = uvc_queue_streamon(&stream->queue, type);
+ mutex_unlock(&stream->mutex);
+
+ return ret;
+}
+
+static int uvc_ioctl_streamoff(struct file *file, void *fh,
+ enum v4l2_buf_type type)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+
+ if (!uvc_has_privileges(handle))
+ return -EBUSY;
+
+ mutex_lock(&stream->mutex);
+ uvc_queue_streamoff(&stream->queue, type);
+ mutex_unlock(&stream->mutex);
+
+ return 0;
+}
+
+static int uvc_ioctl_enum_input(struct file *file, void *fh,
+ struct v4l2_input *input)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_video_chain *chain = handle->chain;
+ const struct uvc_entity *selector = chain->selector;
+ struct uvc_entity *iterm = NULL;
+ u32 index = input->index;
+ int pin = 0;
+
+ if (selector == NULL ||
+ (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
+ if (index != 0)
+ return -EINVAL;
+ list_for_each_entry(iterm, &chain->entities, chain) {
+ if (UVC_ENTITY_IS_ITERM(iterm))
+ break;
+ }
+ pin = iterm->id;
+ } else if (index < selector->bNrInPins) {
+ pin = selector->baSourceID[index];
+ list_for_each_entry(iterm, &chain->entities, chain) {
+ if (!UVC_ENTITY_IS_ITERM(iterm))
+ continue;
+ if (iterm->id == pin)
+ break;
+ }
+ }
+
+ if (iterm == NULL || iterm->id != pin)
+ return -EINVAL;
+
+ memset(input, 0, sizeof(*input));
+ input->index = index;
+ strlcpy(input->name, iterm->name, sizeof(input->name));
+ if (UVC_ENTITY_TYPE(iterm) == UVC_ITT_CAMERA)
+ input->type = V4L2_INPUT_TYPE_CAMERA;
+
+ return 0;
+}
+
+static int uvc_ioctl_g_input(struct file *file, void *fh, unsigned int *input)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_video_chain *chain = handle->chain;
+ int ret;
+ u8 i;
+
+ if (chain->selector == NULL ||
+ (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
+ *input = 0;
+ return 0;
+ }
+
+ ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, chain->selector->id,
+ chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL,
+ &i, 1);
+ if (ret < 0)
+ return ret;
+
+ *input = i - 1;
+ return 0;
+}
+
+static int uvc_ioctl_s_input(struct file *file, void *fh, unsigned int input)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_video_chain *chain = handle->chain;
+ int ret;
+ u32 i;
+
+ ret = uvc_acquire_privileges(handle);
+ if (ret < 0)
+ return ret;
+
+ if (chain->selector == NULL ||
+ (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
+ if (input)
+ return -EINVAL;
+ return 0;
+ }
+
+ if (input >= chain->selector->bNrInPins)
+ return -EINVAL;
+
+ i = input + 1;
+ return uvc_query_ctrl(chain->dev, UVC_SET_CUR, chain->selector->id,
+ chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL,
+ &i, 1);
+}
+
+static int uvc_ioctl_queryctrl(struct file *file, void *fh,
+ struct v4l2_queryctrl *qc)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_video_chain *chain = handle->chain;
+
+ return uvc_query_v4l2_ctrl(chain, qc);
+}
+
+static int uvc_ioctl_query_ext_ctrl(struct file *file, void *fh,
+ struct v4l2_query_ext_ctrl *qec)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_video_chain *chain = handle->chain;
+ struct v4l2_queryctrl qc = { qec->id };
+ int ret;
+
+ ret = uvc_query_v4l2_ctrl(chain, &qc);
+ if (ret)
+ return ret;
+
+ qec->id = qc.id;
+ qec->type = qc.type;
+ strlcpy(qec->name, qc.name, sizeof(qec->name));
+ qec->minimum = qc.minimum;
+ qec->maximum = qc.maximum;
+ qec->step = qc.step;
+ qec->default_value = qc.default_value;
+ qec->flags = qc.flags;
+ qec->elem_size = 4;
+ qec->elems = 1;
+ qec->nr_of_dims = 0;
+ memset(qec->dims, 0, sizeof(qec->dims));
+ memset(qec->reserved, 0, sizeof(qec->reserved));
+
+ return 0;
+}
+
+static int uvc_ioctl_g_ctrl(struct file *file, void *fh,
+ struct v4l2_control *ctrl)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_video_chain *chain = handle->chain;
+ struct v4l2_ext_control xctrl;
+ int ret;
+
+ memset(&xctrl, 0, sizeof(xctrl));
+ xctrl.id = ctrl->id;
+
+ ret = uvc_ctrl_begin(chain);
+ if (ret < 0)
+ return ret;
+
+ ret = uvc_ctrl_get(chain, &xctrl);
+ uvc_ctrl_rollback(handle);
+ if (ret < 0)
+ return ret;
+
+ ctrl->value = xctrl.value;
+ return 0;
+}
+
+static int uvc_ioctl_s_ctrl(struct file *file, void *fh,
+ struct v4l2_control *ctrl)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_video_chain *chain = handle->chain;
+ struct v4l2_ext_control xctrl;
+ int ret;
+
+ memset(&xctrl, 0, sizeof(xctrl));
+ xctrl.id = ctrl->id;
+ xctrl.value = ctrl->value;
+
+ ret = uvc_ctrl_begin(chain);
+ if (ret < 0)
+ return ret;
+
+ ret = uvc_ctrl_set(chain, &xctrl);
+ if (ret < 0) {
+ uvc_ctrl_rollback(handle);
+ return ret;
+ }
+
+ ret = uvc_ctrl_commit(handle, &xctrl, 1);
+ if (ret < 0)
+ return ret;
+
+ ctrl->value = xctrl.value;
+ return 0;
+}
+
+static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
+ struct v4l2_ext_controls *ctrls)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_video_chain *chain = handle->chain;
+ struct v4l2_ext_control *ctrl = ctrls->controls;
+ unsigned int i;
+ int ret;
+
+ ret = uvc_ctrl_begin(chain);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < ctrls->count; ++ctrl, ++i) {
+ ret = uvc_ctrl_get(chain, ctrl);
+ if (ret < 0) {
+ uvc_ctrl_rollback(handle);
+ ctrls->error_idx = i;
+ return ret;
+ }
+ }
+
+ ctrls->error_idx = 0;
+
+ return uvc_ctrl_rollback(handle);
+}
+
+static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle,
+ struct v4l2_ext_controls *ctrls,
+ bool commit)
+{
+ struct v4l2_ext_control *ctrl = ctrls->controls;
+ struct uvc_video_chain *chain = handle->chain;
+ unsigned int i;
+ int ret;
+
+ ret = uvc_ctrl_begin(chain);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < ctrls->count; ++ctrl, ++i) {
+ ret = uvc_ctrl_set(chain, ctrl);
+ if (ret < 0) {
+ uvc_ctrl_rollback(handle);
+ ctrls->error_idx = commit ? ctrls->count : i;
+ return ret;
+ }
+ }
+
+ ctrls->error_idx = 0;
+
+ if (commit)
+ return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count);
+ else
+ return uvc_ctrl_rollback(handle);
+}
+
+static int uvc_ioctl_s_ext_ctrls(struct file *file, void *fh,
+ struct v4l2_ext_controls *ctrls)
+{
+ struct uvc_fh *handle = fh;
+
+ return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, true);
+}
+
+static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh,
+ struct v4l2_ext_controls *ctrls)
+{
+ struct uvc_fh *handle = fh;
+
+ return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, false);
+}
+
+static int uvc_ioctl_querymenu(struct file *file, void *fh,
+ struct v4l2_querymenu *qm)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_video_chain *chain = handle->chain;
+
+ return uvc_query_v4l2_menu(chain, qm);
+}
+
+static int uvc_ioctl_g_selection(struct file *file, void *fh,
+ struct v4l2_selection *sel)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+
+ if (sel->type != stream->type)
+ return -EINVAL;
+
+ switch (sel->target) {
+ case V4L2_SEL_TGT_CROP_DEFAULT:
+ case V4L2_SEL_TGT_CROP_BOUNDS:
+ if (stream->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ break;
+ case V4L2_SEL_TGT_COMPOSE_DEFAULT:
+ case V4L2_SEL_TGT_COMPOSE_BOUNDS:
+ if (stream->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ sel->r.left = 0;
+ sel->r.top = 0;
+ mutex_lock(&stream->mutex);
+ sel->r.width = stream->cur_frame->wWidth;
+ sel->r.height = stream->cur_frame->wHeight;
+ mutex_unlock(&stream->mutex);
+
+ return 0;
+}
+
+static int uvc_ioctl_g_parm(struct file *file, void *fh,
+ struct v4l2_streamparm *parm)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+
+ return uvc_v4l2_get_streamparm(stream, parm);
+}
+
+static int uvc_ioctl_s_parm(struct file *file, void *fh,
+ struct v4l2_streamparm *parm)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+ int ret;
+
+ ret = uvc_acquire_privileges(handle);
+ if (ret < 0)
+ return ret;
+
+ return uvc_v4l2_set_streamparm(stream, parm);
+}
+
+static int uvc_ioctl_enum_framesizes(struct file *file, void *fh,
+ struct v4l2_frmsizeenum *fsize)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+ struct uvc_format *format = NULL;
+ struct uvc_frame *frame;
+ int i;
+
+ /* Look for the given pixel format */
+ for (i = 0; i < stream->nformats; i++) {
+ if (stream->format[i].fcc == fsize->pixel_format) {
+ format = &stream->format[i];
+ break;
+ }
+ }
+ if (format == NULL)
+ return -EINVAL;
+
+ if (fsize->index >= format->nframes)
+ return -EINVAL;
+
+ frame = &format->frame[fsize->index];
+ fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+ fsize->discrete.width = frame->wWidth;
+ fsize->discrete.height = frame->wHeight;
+ return 0;
+}
+
+static int uvc_ioctl_enum_frameintervals(struct file *file, void *fh,
+ struct v4l2_frmivalenum *fival)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+ struct uvc_format *format = NULL;
+ struct uvc_frame *frame = NULL;
+ int i;
+
+ /* Look for the given pixel format and frame size */
+ for (i = 0; i < stream->nformats; i++) {
+ if (stream->format[i].fcc == fival->pixel_format) {
+ format = &stream->format[i];
+ break;
+ }
+ }
+ if (format == NULL)
+ return -EINVAL;
+
+ for (i = 0; i < format->nframes; i++) {
+ if (format->frame[i].wWidth == fival->width &&
+ format->frame[i].wHeight == fival->height) {
+ frame = &format->frame[i];
+ break;
+ }
+ }
+ if (frame == NULL)
+ return -EINVAL;
+
+ if (frame->bFrameIntervalType) {
+ if (fival->index >= frame->bFrameIntervalType)
+ return -EINVAL;
+
+ fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
+ fival->discrete.numerator =
+ frame->dwFrameInterval[fival->index];
+ fival->discrete.denominator = 10000000;
+ uvc_simplify_fraction(&fival->discrete.numerator,
+ &fival->discrete.denominator, 8, 333);
+ } else {
+ if (fival->index)
+ return -EINVAL;
+
+ fival->type = V4L2_FRMIVAL_TYPE_STEPWISE;
+ fival->stepwise.min.numerator = frame->dwFrameInterval[0];
+ fival->stepwise.min.denominator = 10000000;
+ fival->stepwise.max.numerator = frame->dwFrameInterval[1];
+ fival->stepwise.max.denominator = 10000000;
+ fival->stepwise.step.numerator = frame->dwFrameInterval[2];
+ fival->stepwise.step.denominator = 10000000;
+ uvc_simplify_fraction(&fival->stepwise.min.numerator,
+ &fival->stepwise.min.denominator, 8, 333);
+ uvc_simplify_fraction(&fival->stepwise.max.numerator,
+ &fival->stepwise.max.denominator, 8, 333);
+ uvc_simplify_fraction(&fival->stepwise.step.numerator,
+ &fival->stepwise.step.denominator, 8, 333);
+ }
+
+ return 0;
+}
+
+static int uvc_ioctl_subscribe_event(struct v4l2_fh *fh,
+ const struct v4l2_event_subscription *sub)
+{
+ switch (sub->type) {
+ case V4L2_EVENT_CTRL:
+ return v4l2_event_subscribe(fh, sub, 0, &uvc_ctrl_sub_ev_ops);
+ default:
+ return -EINVAL;
+ }
+}
+
+static long uvc_ioctl_default(struct file *file, void *fh, bool valid_prio,
+ unsigned int cmd, void *arg)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_video_chain *chain = handle->chain;
+
+ switch (cmd) {
+ /* Dynamic controls. */
+ case UVCIOC_CTRL_MAP:
+ return uvc_ioctl_ctrl_map(chain, arg);
+
+ case UVCIOC_CTRL_QUERY:
+ return uvc_xu_ctrl_query(chain, arg);
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+#ifdef CONFIG_COMPAT
+struct uvc_xu_control_mapping32 {
+ __u32 id;
+ __u8 name[32];
+ __u8 entity[16];
+ __u8 selector;
+
+ __u8 size;
+ __u8 offset;
+ __u32 v4l2_type;
+ __u32 data_type;
+
+ compat_caddr_t menu_info;
+ __u32 menu_count;
+
+ __u32 reserved[4];
+};
+
+static int uvc_v4l2_get_xu_mapping(struct uvc_xu_control_mapping *kp,
+ const struct uvc_xu_control_mapping32 __user *up)
+{
+ struct uvc_menu_info __user *umenus;
+ struct uvc_menu_info __user *kmenus;
+ compat_caddr_t p;
+
+ if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
+ __copy_from_user(kp, up, offsetof(typeof(*up), menu_info)) ||
+ __get_user(kp->menu_count, &up->menu_count))
+ return -EFAULT;
+
+ memset(kp->reserved, 0, sizeof(kp->reserved));
+
+ if (kp->menu_count == 0) {
+ kp->menu_info = NULL;
+ return 0;
+ }
+
+ if (__get_user(p, &up->menu_info))
+ return -EFAULT;
+ umenus = compat_ptr(p);
+ if (!access_ok(VERIFY_READ, umenus, kp->menu_count * sizeof(*umenus)))
+ return -EFAULT;
+
+ kmenus = compat_alloc_user_space(kp->menu_count * sizeof(*kmenus));
+ if (kmenus == NULL)
+ return -EFAULT;
+ kp->menu_info = kmenus;
+
+ if (copy_in_user(kmenus, umenus, kp->menu_count * sizeof(*umenus)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp,
+ struct uvc_xu_control_mapping32 __user *up)
+{
+ struct uvc_menu_info __user *umenus;
+ struct uvc_menu_info __user *kmenus = kp->menu_info;
+ compat_caddr_t p;
+
+ if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
+ __copy_to_user(up, kp, offsetof(typeof(*up), menu_info)) ||
+ __put_user(kp->menu_count, &up->menu_count))
+ return -EFAULT;
+
+ if (__clear_user(up->reserved, sizeof(up->reserved)))
+ return -EFAULT;
+
+ if (kp->menu_count == 0)
+ return 0;
+
+ if (get_user(p, &up->menu_info))
+ return -EFAULT;
+ umenus = compat_ptr(p);
+
+ if (copy_in_user(umenus, kmenus, kp->menu_count * sizeof(*umenus)))
+ return -EFAULT;
+
+ return 0;
+}
+
+struct uvc_xu_control_query32 {
+ __u8 unit;
+ __u8 selector;
+ __u8 query;
+ __u16 size;
+ compat_caddr_t data;
+};
+
+static int uvc_v4l2_get_xu_query(struct uvc_xu_control_query *kp,
+ const struct uvc_xu_control_query32 __user *up)
+{
+ u8 __user *udata;
+ u8 __user *kdata;
+ compat_caddr_t p;
+
+ if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
+ __copy_from_user(kp, up, offsetof(typeof(*up), data)))
+ return -EFAULT;
+
+ if (kp->size == 0) {
+ kp->data = NULL;
+ return 0;
+ }
+
+ if (__get_user(p, &up->data))
+ return -EFAULT;
+ udata = compat_ptr(p);
+ if (!access_ok(VERIFY_READ, udata, kp->size))
+ return -EFAULT;
+
+ kdata = compat_alloc_user_space(kp->size);
+ if (kdata == NULL)
+ return -EFAULT;
+ kp->data = kdata;
+
+ if (copy_in_user(kdata, udata, kp->size))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int uvc_v4l2_put_xu_query(const struct uvc_xu_control_query *kp,
+ struct uvc_xu_control_query32 __user *up)
+{
+ u8 __user *udata;
+ u8 __user *kdata = kp->data;
+ compat_caddr_t p;
+
+ if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
+ __copy_to_user(up, kp, offsetof(typeof(*up), data)))
+ return -EFAULT;
+
+ if (kp->size == 0)
+ return 0;
+
+ if (get_user(p, &up->data))
+ return -EFAULT;
+ udata = compat_ptr(p);
+ if (!access_ok(VERIFY_READ, udata, kp->size))
+ return -EFAULT;
+
+ if (copy_in_user(udata, kdata, kp->size))
+ return -EFAULT;
+
+ return 0;
+}
+
+#define UVCIOC_CTRL_MAP32 _IOWR('u', 0x20, struct uvc_xu_control_mapping32)
+#define UVCIOC_CTRL_QUERY32 _IOWR('u', 0x21, struct uvc_xu_control_query32)
+
+static long uvc_v4l2_compat_ioctl32(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ union {
+ struct uvc_xu_control_mapping xmap;
+ struct uvc_xu_control_query xqry;
+ } karg;
+ void __user *up = compat_ptr(arg);
+ mm_segment_t old_fs;
+ long ret;
+
+ switch (cmd) {
+ case UVCIOC_CTRL_MAP32:
+ cmd = UVCIOC_CTRL_MAP;
+ ret = uvc_v4l2_get_xu_mapping(&karg.xmap, up);
+ break;
+
+ case UVCIOC_CTRL_QUERY32:
+ cmd = UVCIOC_CTRL_QUERY;
+ ret = uvc_v4l2_get_xu_query(&karg.xqry, up);
+ break;
+
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ old_fs = get_fs();
+ set_fs(KERNEL_DS);
+ ret = video_ioctl2(file, cmd, (unsigned long)&karg);
+ set_fs(old_fs);
+
+ if (ret < 0)
+ return ret;
+
+ switch (cmd) {
+ case UVCIOC_CTRL_MAP:
+ ret = uvc_v4l2_put_xu_mapping(&karg.xmap, up);
+ break;
+
+ case UVCIOC_CTRL_QUERY:
+ ret = uvc_v4l2_put_xu_query(&karg.xqry, up);
+ break;
+ }
+
+ return ret;
+}
+#endif
+
+static ssize_t uvc_v4l2_read(struct file *file, char __user *data,
+ size_t count, loff_t *ppos)
+{
+ uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_read: not implemented.\n");
+ return -EINVAL;
+}
+
+static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct uvc_fh *handle = file->private_data;
+ struct uvc_streaming *stream = handle->stream;
+
+ uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n");
+
+ return uvc_queue_mmap(&stream->queue, vma);
+}
+
+static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait)
+{
+ struct uvc_fh *handle = file->private_data;
+ struct uvc_streaming *stream = handle->stream;
+
+ uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n");
+
+ return uvc_queue_poll(&stream->queue, file, wait);
+}
+
+#ifndef CONFIG_MMU
+static unsigned long uvc_v4l2_get_unmapped_area(struct file *file,
+ unsigned long addr, unsigned long len, unsigned long pgoff,
+ unsigned long flags)
+{
+ struct uvc_fh *handle = file->private_data;
+ struct uvc_streaming *stream = handle->stream;
+
+ uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_get_unmapped_area\n");
+
+ return uvc_queue_get_unmapped_area(&stream->queue, pgoff);
+}
+#endif
+
+const struct v4l2_ioctl_ops uvc_ioctl_ops = {
+ .vidioc_querycap = uvc_ioctl_querycap,
+ .vidioc_enum_fmt_vid_cap = uvc_ioctl_enum_fmt_vid_cap,
+ .vidioc_enum_fmt_vid_out = uvc_ioctl_enum_fmt_vid_out,
+ .vidioc_g_fmt_vid_cap = uvc_ioctl_g_fmt_vid_cap,
+ .vidioc_g_fmt_vid_out = uvc_ioctl_g_fmt_vid_out,
+ .vidioc_s_fmt_vid_cap = uvc_ioctl_s_fmt_vid_cap,
+ .vidioc_s_fmt_vid_out = uvc_ioctl_s_fmt_vid_out,
+ .vidioc_try_fmt_vid_cap = uvc_ioctl_try_fmt_vid_cap,
+ .vidioc_try_fmt_vid_out = uvc_ioctl_try_fmt_vid_out,
+ .vidioc_reqbufs = uvc_ioctl_reqbufs,
+ .vidioc_querybuf = uvc_ioctl_querybuf,
+ .vidioc_qbuf = uvc_ioctl_qbuf,
+ .vidioc_dqbuf = uvc_ioctl_dqbuf,
+ .vidioc_create_bufs = uvc_ioctl_create_bufs,
+ .vidioc_streamon = uvc_ioctl_streamon,
+ .vidioc_streamoff = uvc_ioctl_streamoff,
+ .vidioc_enum_input = uvc_ioctl_enum_input,
+ .vidioc_g_input = uvc_ioctl_g_input,
+ .vidioc_s_input = uvc_ioctl_s_input,
+ .vidioc_queryctrl = uvc_ioctl_queryctrl,
+ .vidioc_query_ext_ctrl = uvc_ioctl_query_ext_ctrl,
+ .vidioc_g_ctrl = uvc_ioctl_g_ctrl,
+ .vidioc_s_ctrl = uvc_ioctl_s_ctrl,
+ .vidioc_g_ext_ctrls = uvc_ioctl_g_ext_ctrls,
+ .vidioc_s_ext_ctrls = uvc_ioctl_s_ext_ctrls,
+ .vidioc_try_ext_ctrls = uvc_ioctl_try_ext_ctrls,
+ .vidioc_querymenu = uvc_ioctl_querymenu,
+ .vidioc_g_selection = uvc_ioctl_g_selection,
+ .vidioc_g_parm = uvc_ioctl_g_parm,
+ .vidioc_s_parm = uvc_ioctl_s_parm,
+ .vidioc_enum_framesizes = uvc_ioctl_enum_framesizes,
+ .vidioc_enum_frameintervals = uvc_ioctl_enum_frameintervals,
+ .vidioc_subscribe_event = uvc_ioctl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+ .vidioc_default = uvc_ioctl_default,
+};
+
+const struct v4l2_file_operations uvc_fops = {
+ .owner = THIS_MODULE,
+ .open = uvc_v4l2_open,
+ .release = uvc_v4l2_release,
+ .unlocked_ioctl = video_ioctl2,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl32 = uvc_v4l2_compat_ioctl32,
+#endif
+ .read = uvc_v4l2_read,
+ .mmap = uvc_v4l2_mmap,
+ .poll = uvc_v4l2_poll,
+#ifndef CONFIG_MMU
+ .get_unmapped_area = uvc_v4l2_get_unmapped_area,
+#endif
+};
+