[media] rename most media/video usb drivers to media/usb

Rename all USB drivers with their own directory under
drivers/media/video into drivers/media/usb and update the
building system.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 0 insertions, 1317 deletions

diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c
deleted file mode 100644
index f00db3060e0e..000000000000
--- a/drivers/media/video/uvc/uvc_v4l2.c
+++ /dev/null
@@ -1,1317 +0,0 @@
-/*
- *      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/version.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. */
-	for (i = 0; i < stream->nformats; ++i) {
-		format = &stream->format[i];
-		if (format->fcc == fmt->fmt.pix.pixelformat)
-			break;
-	}
-
-	if (format == NULL || format->fcc != fmt->fmt.pix.pixelformat) {
-		uvc_trace(UVC_TRACE_FORMAT, "Unsupported format 0x%08x.\n",
-				fmt->fmt.pix.pixelformat);
-		return -EINVAL;
-	}
-
-	/* 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;
-	}
-
-	memcpy(&stream->ctrl, &probe, sizeof 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;
-	}
-
-	memcpy(&probe, &stream->ctrl, sizeof probe);
-	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;
-	}
-
-	memcpy(&stream->ctrl, &probe, sizeof 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;
-	}
-
-	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);
-			return ret;
-		}
-	}
-
-	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_video_enable(stream, 0);
-		uvc_free_buffers(&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;
-
-	if (atomic_dec_return(&stream->dev->users) == 0)
-		uvc_status_stop(stream->dev);
-
-	usb_autopm_put_interface(stream->dev->intf);
-	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_fh *handle = file->private_data;
-	struct uvc_video_chain *chain = handle->chain;
-	struct uvc_streaming *stream = handle->stream;
-	long ret = 0;
-
-	switch (cmd) {
-	/* Query capabilities */
-	case VIDIOC_QUERYCAP:
-	{
-		struct v4l2_capability *cap = arg;
-
-		memset(cap, 0, sizeof *cap);
-		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->version = LINUX_VERSION_CODE;
-		if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
-			cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
-					  | V4L2_CAP_STREAMING;
-		else
-			cap->capabilities = V4L2_CAP_VIDEO_OUTPUT
-					  | V4L2_CAP_STREAMING;
-		break;
-	}
-
-	/* Get, Set & Query control */
-	case VIDIOC_QUERYCTRL:
-		return uvc_query_v4l2_ctrl(chain, arg);
-
-	case VIDIOC_G_CTRL:
-	{
-		struct v4l2_control *ctrl = arg;
-		struct v4l2_ext_control xctrl;
-
-		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)
-			ctrl->value = xctrl.value;
-		break;
-	}
-
-	case VIDIOC_S_CTRL:
-	{
-		struct v4l2_control *ctrl = arg;
-		struct v4l2_ext_control xctrl;
-
-		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)
-			ctrl->value = xctrl.value;
-		break;
-	}
-
-	case VIDIOC_QUERYMENU:
-		return uvc_query_v4l2_menu(chain, arg);
-
-	case VIDIOC_G_EXT_CTRLS:
-	{
-		struct v4l2_ext_controls *ctrls = arg;
-		struct v4l2_ext_control *ctrl = ctrls->controls;
-		unsigned int i;
-
-		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;
-		ret = uvc_ctrl_rollback(handle);
-		break;
-	}
-
-	case VIDIOC_S_EXT_CTRLS:
-	case VIDIOC_TRY_EXT_CTRLS:
-	{
-		struct v4l2_ext_controls *ctrls = arg;
-		struct v4l2_ext_control *ctrl = ctrls->controls;
-		unsigned int i;
-
-		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 = i;
-				return ret;
-			}
-		}
-
-		ctrls->error_idx = 0;
-
-		if (cmd == VIDIOC_S_EXT_CTRLS)
-			ret = uvc_ctrl_commit(handle,
-					      ctrls->controls, ctrls->count);
-		else
-			ret = uvc_ctrl_rollback(handle);
-		break;
-	}
-
-	/* Get, Set & Enum input */
-	case VIDIOC_ENUMINPUT:
-	{
-		const struct uvc_entity *selector = chain->selector;
-		struct v4l2_input *input = arg;
-		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;
-		break;
-	}
-
-	case VIDIOC_G_INPUT:
-	{
-		u8 input;
-
-		if (chain->selector == NULL ||
-		    (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
-			*(int *)arg = 0;
-			break;
-		}
-
-		ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR,
-			chain->selector->id, chain->dev->intfnum,
-			UVC_SU_INPUT_SELECT_CONTROL, &input, 1);
-		if (ret < 0)
-			return ret;
-
-		*(int *)arg = input - 1;
-		break;
-	}
-
-	case VIDIOC_S_INPUT:
-	{
-		u32 input = *(u32 *)arg + 1;
-
-		if ((ret = uvc_acquire_privileges(handle)) < 0)
-			return ret;
-
-		if (chain->selector == NULL ||
-		    (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
-			if (input != 1)
-				return -EINVAL;
-			break;
-		}
-
-		if (input == 0 || input > chain->selector->bNrInPins)
-			return -EINVAL;
-
-		return uvc_query_ctrl(chain->dev, UVC_SET_CUR,
-			chain->selector->id, chain->dev->intfnum,
-			UVC_SU_INPUT_SELECT_CONTROL, &input, 1);
-	}
-
-	/* Try, Get, Set & Enum format */
-	case VIDIOC_ENUM_FMT:
-	{
-		struct v4l2_fmtdesc *fmt = arg;
-		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;
-		break;
-	}
-
-	case VIDIOC_TRY_FMT:
-	{
-		struct uvc_streaming_control probe;
-
-		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(stream, arg);
-
-	case VIDIOC_G_FMT:
-		return uvc_v4l2_get_format(stream, arg);
-
-	/* Frame size enumeration */
-	case VIDIOC_ENUM_FRAMESIZES:
-	{
-		struct v4l2_frmsizeenum *fsize = arg;
-		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;
-		break;
-	}
-
-	/* Frame interval enumeration */
-	case VIDIOC_ENUM_FRAMEINTERVALS:
-	{
-		struct v4l2_frmivalenum *fival = arg;
-		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 {
-			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);
-		}
-		break;
-	}
-
-	/* Get & Set streaming parameters */
-	case VIDIOC_G_PARM:
-		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(stream, arg);
-
-	/* Cropping and scaling */
-	case VIDIOC_CROPCAP:
-	{
-		struct v4l2_cropcap *ccap = arg;
-
-		if (ccap->type != stream->type)
-			return -EINVAL;
-
-		ccap->bounds.left = 0;
-		ccap->bounds.top = 0;
-
-		mutex_lock(&stream->mutex);
-		ccap->bounds.width = stream->cur_frame->wWidth;
-		ccap->bounds.height = stream->cur_frame->wHeight;
-		mutex_unlock(&stream->mutex);
-
-		ccap->defrect = ccap->bounds;
-
-		ccap->pixelaspect.numerator = 1;
-		ccap->pixelaspect.denominator = 1;
-		break;
-	}
-
-	case VIDIOC_G_CROP:
-	case VIDIOC_S_CROP:
-		return -EINVAL;
-
-	/* Buffers & streaming */
-	case VIDIOC_REQBUFS:
-		if ((ret = uvc_acquire_privileges(handle)) < 0)
-			return ret;
-
-		mutex_lock(&stream->mutex);
-		ret = uvc_alloc_buffers(&stream->queue, arg);
-		mutex_unlock(&stream->mutex);
-		if (ret < 0)
-			return ret;
-
-		if (ret == 0)
-			uvc_dismiss_privileges(handle);
-
-		ret = 0;
-		break;
-
-	case VIDIOC_QUERYBUF:
-	{
-		struct v4l2_buffer *buf = arg;
-
-		if (!uvc_has_privileges(handle))
-			return -EBUSY;
-
-		return uvc_query_buffer(&stream->queue, buf);
-	}
-
-	case VIDIOC_QBUF:
-		if (!uvc_has_privileges(handle))
-			return -EBUSY;
-
-		return uvc_queue_buffer(&stream->queue, arg);
-
-	case VIDIOC_DQBUF:
-		if (!uvc_has_privileges(handle))
-			return -EBUSY;
-
-		return uvc_dequeue_buffer(&stream->queue, arg,
-			file->f_flags & O_NONBLOCK);
-
-	case VIDIOC_STREAMON:
-	{
-		int *type = arg;
-
-		if (*type != stream->type)
-			return -EINVAL;
-
-		if (!uvc_has_privileges(handle))
-			return -EBUSY;
-
-		mutex_lock(&stream->mutex);
-		ret = uvc_video_enable(stream, 1);
-		mutex_unlock(&stream->mutex);
-		if (ret < 0)
-			return ret;
-		break;
-	}
-
-	case VIDIOC_STREAMOFF:
-	{
-		int *type = arg;
-
-		if (*type != stream->type)
-			return -EINVAL;
-
-		if (!uvc_has_privileges(handle))
-			return -EBUSY;
-
-		return uvc_video_enable(stream, 0);
-	}
-
-	case VIDIOC_SUBSCRIBE_EVENT:
-	{
-		struct v4l2_event_subscription *sub = arg;
-
-		switch (sub->type) {
-		case V4L2_EVENT_CTRL:
-			return v4l2_event_subscribe(&handle->vfh, sub, 0,
-						    &uvc_ctrl_sub_ev_ops);
-		default:
-			return -EINVAL;
-		}
-	}
-
-	case VIDIOC_UNSUBSCRIBE_EVENT:
-		return v4l2_event_unsubscribe(&handle->vfh, arg);
-
-	case VIDIOC_DQEVENT:
-		return v4l2_event_dequeue(&handle->vfh, arg,
-					  file->f_flags & O_NONBLOCK);
-
-	/* Analog video standards make no sense for digital cameras. */
-	case VIDIOC_ENUMSTD:
-	case VIDIOC_QUERYSTD:
-	case VIDIOC_G_STD:
-	case VIDIOC_S_STD:
-
-	case VIDIOC_OVERLAY:
-
-	case VIDIOC_ENUMAUDIO:
-	case VIDIOC_ENUMAUDOUT:
-
-	case VIDIOC_ENUMOUTPUT:
-		uvc_trace(UVC_TRACE_IOCTL, "Unsupported ioctl 0x%08x\n", cmd);
-		return -EINVAL;
-
-	case UVCIOC_CTRL_MAP:
-		return uvc_ioctl_ctrl_map(chain, arg);
-
-	case UVCIOC_CTRL_QUERY:
-		return uvc_xu_ctrl_query(chain, arg);
-
-	default:
-		uvc_trace(UVC_TRACE_IOCTL, "Unknown ioctl 0x%08x\n", cmd);
-		return -ENOTTY;
-	}
-
-	return ret;
-}
-
-static long uvc_v4l2_ioctl(struct file *file,
-		     unsigned int cmd, unsigned long arg)
-{
-	if (uvc_trace_param & UVC_TRACE_IOCTL) {
-		uvc_printk(KERN_DEBUG, "uvc_v4l2_ioctl(");
-		v4l_printk_ioctl(NULL, cmd);
-		printk(")\n");
-	}
-
-	return video_usercopy(file, cmd, arg, uvc_v4l2_do_ioctl);
-}
-
-#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 = uvc_v4l2_ioctl(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_file_operations uvc_fops = {
-	.owner		= THIS_MODULE,
-	.open		= uvc_v4l2_open,
-	.release	= uvc_v4l2_release,
-	.unlocked_ioctl	= uvc_v4l2_ioctl,
-#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
-};
-