// SPDX-License-Identifier: GPL-2.0-or-later
|
/*
|
* uvc_v4l2.c -- USB Video Class driver - V4L2 API
|
*
|
* Copyright (C) 2005-2010
|
* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
|
*/
|
|
#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 free_map;
|
}
|
|
size = xmap->menu_count * sizeof(*map->menu_info);
|
map->menu_info = memdup_user(xmap->menu_info, size);
|
if (IS_ERR(map->menu_info)) {
|
ret = PTR_ERR(map->menu_info);
|
goto free_map;
|
}
|
|
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 free_map;
|
}
|
|
ret = uvc_ctrl_add_mapping(chain, map);
|
|
kfree(map->menu_info);
|
free_map:
|
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 u32 uvc_v4l2_get_bytesperline(const struct uvc_format *format,
|
const struct uvc_frame *frame)
|
{
|
switch (format->fcc) {
|
case V4L2_PIX_FMT_NV12:
|
case V4L2_PIX_FMT_YVU420:
|
case V4L2_PIX_FMT_YUV420:
|
case V4L2_PIX_FMT_M420:
|
return frame->wWidth;
|
|
default:
|
return format->bpp * frame->wWidth / 8;
|
}
|
}
|
|
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;
|
|
/* After the probe, update fmt with the values returned from
|
* negotiation with the device. Some devices return invalid bFormatIndex
|
* and bFrameIndex values, in which case we can only assume they have
|
* accepted the requested format as-is.
|
*/
|
for (i = 0; i < stream->nformats; ++i) {
|
if (probe->bFormatIndex == stream->format[i].index) {
|
format = &stream->format[i];
|
break;
|
}
|
}
|
|
if (i == stream->nformats)
|
uvc_trace(UVC_TRACE_FORMAT,
|
"Unknown bFormatIndex %u, using default\n",
|
probe->bFormatIndex);
|
|
for (i = 0; i < format->nframes; ++i) {
|
if (probe->bFrameIndex == format->frame[i].bFrameIndex) {
|
frame = &format->frame[i];
|
break;
|
}
|
}
|
|
if (i == format->nframes)
|
uvc_trace(UVC_TRACE_FORMAT,
|
"Unknown bFrameIndex %u, using default\n",
|
probe->bFrameIndex);
|
|
fmt->fmt.pix.width = frame->wWidth;
|
fmt->fmt.pix.height = frame->wHeight;
|
fmt->fmt.pix.field = V4L2_FIELD_NONE;
|
fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(format, frame);
|
fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize;
|
fmt->fmt.pix.pixelformat = format->fcc;
|
fmt->fmt.pix.colorspace = format->colorspace;
|
fmt->fmt.pix.xfer_func = format->xfer_func;
|
fmt->fmt.pix.ycbcr_enc = format->ycbcr_enc;
|
|
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 = uvc_v4l2_get_bytesperline(format, frame);
|
fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize;
|
fmt->fmt.pix.colorspace = format->colorspace;
|
fmt->fmt.pix.xfer_func = format->xfer_func;
|
fmt->fmt.pix.ycbcr_enc = format->ycbcr_enc;
|
|
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)
|
{
|
u32 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;
|
struct uvc_format *format;
|
struct uvc_frame *frame;
|
u32 interval, maxd;
|
unsigned int i;
|
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;
|
}
|
|
format = stream->cur_format;
|
frame = stream->cur_frame;
|
probe = stream->ctrl;
|
probe.dwFrameInterval = uvc_try_frame_interval(frame, interval);
|
maxd = abs((s32)probe.dwFrameInterval - interval);
|
|
/* Try frames with matching size to find the best frame interval. */
|
for (i = 0; i < format->nframes && maxd != 0; i++) {
|
u32 d, ival;
|
|
if (&format->frame[i] == stream->cur_frame)
|
continue;
|
|
if (format->frame[i].wWidth != stream->cur_frame->wWidth ||
|
format->frame[i].wHeight != stream->cur_frame->wHeight)
|
continue;
|
|
ival = uvc_try_frame_interval(&format->frame[i], interval);
|
d = abs((s32)ival - interval);
|
if (d >= maxd)
|
continue;
|
|
frame = &format->frame[i];
|
probe.bFrameIndex = frame->bFrameIndex;
|
probe.dwFrameInterval = ival;
|
maxd = d;
|
}
|
|
/* 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;
|
stream->cur_frame = frame;
|
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;
|
parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
|
} else {
|
parm->parm.output.timeperframe = timeperframe;
|
parm->parm.output.capability = V4L2_CAP_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);
|
|
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;
|
|
strscpy(cap->driver, "uvcvideo", sizeof(cap->driver));
|
strscpy(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;
|
|
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;
|
strscpy(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,
|
stream->vdev.v4l2_dev->mdev, buf);
|
}
|
|
static int uvc_ioctl_expbuf(struct file *file, void *fh,
|
struct v4l2_exportbuffer *exp)
|
{
|
struct uvc_fh *handle = fh;
|
struct uvc_streaming *stream = handle->stream;
|
|
if (!uvc_has_privileges(handle))
|
return -EBUSY;
|
|
return uvc_export_buffer(&stream->queue, exp);
|
}
|
|
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;
|
struct uvc_entity *it;
|
u32 index = input->index;
|
|
if (selector == NULL ||
|
(chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
|
if (index != 0)
|
return -EINVAL;
|
list_for_each_entry(it, &chain->entities, chain) {
|
if (UVC_ENTITY_IS_ITERM(it)) {
|
iterm = it;
|
break;
|
}
|
}
|
} else if (index < selector->bNrInPins) {
|
list_for_each_entry(it, &chain->entities, chain) {
|
if (!UVC_ENTITY_IS_ITERM(it))
|
continue;
|
if (it->id == selector->baSourceID[index]) {
|
iterm = it;
|
break;
|
}
|
}
|
}
|
|
if (iterm == NULL)
|
return -EINVAL;
|
|
memset(input, 0, sizeof(*input));
|
input->index = index;
|
strscpy(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;
|
u8 *buf;
|
int ret;
|
|
if (chain->selector == NULL ||
|
(chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
|
*input = 0;
|
return 0;
|
}
|
|
buf = kmalloc(1, GFP_KERNEL);
|
if (!buf)
|
return -ENOMEM;
|
|
ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, chain->selector->id,
|
chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL,
|
buf, 1);
|
if (!ret)
|
*input = *buf - 1;
|
|
kfree(buf);
|
|
return ret;
|
}
|
|
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;
|
u8 *buf;
|
int ret;
|
|
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;
|
|
buf = kmalloc(1, GFP_KERNEL);
|
if (!buf)
|
return -ENOMEM;
|
|
*buf = input + 1;
|
ret = uvc_query_ctrl(chain->dev, UVC_SET_CUR, chain->selector->id,
|
chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL,
|
buf, 1);
|
kfree(buf);
|
|
return ret;
|
}
|
|
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;
|
strscpy(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(handle, &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;
|
|
if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) {
|
for (i = 0; i < ctrls->count; ++ctrl, ++i) {
|
struct v4l2_queryctrl qc = { .id = ctrl->id };
|
|
ret = uvc_query_v4l2_ctrl(chain, &qc);
|
if (ret < 0) {
|
ctrls->error_idx = i;
|
return ret;
|
}
|
|
ctrl->value = qc.default_value;
|
}
|
|
return 0;
|
}
|
|
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;
|
|
/* Default value cannot be changed */
|
if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL)
|
return -EINVAL;
|
|
ret = uvc_ctrl_begin(chain);
|
if (ret < 0)
|
return ret;
|
|
for (i = 0; i < ctrls->count; ++ctrl, ++i) {
|
ret = uvc_ctrl_set(handle, 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 = NULL;
|
unsigned int index;
|
unsigned 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;
|
|
/* Skip duplicate frame sizes */
|
for (i = 0, index = 0; i < format->nframes; i++) {
|
if (frame && frame->wWidth == format->frame[i].wWidth &&
|
frame->wHeight == format->frame[i].wHeight)
|
continue;
|
frame = &format->frame[i];
|
if (index == fsize->index)
|
break;
|
index++;
|
}
|
|
if (i == format->nframes)
|
return -EINVAL;
|
|
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;
|
unsigned int nintervals;
|
unsigned int index;
|
unsigned 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;
|
|
index = fival->index;
|
for (i = 0; i < format->nframes; i++) {
|
if (format->frame[i].wWidth == fival->width &&
|
format->frame[i].wHeight == fival->height) {
|
frame = &format->frame[i];
|
nintervals = frame->bFrameIntervalType ?: 1;
|
if (index < nintervals)
|
break;
|
index -= nintervals;
|
}
|
}
|
if (i == format->nframes)
|
return -EINVAL;
|
|
if (frame->bFrameIntervalType) {
|
fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
|
fival->discrete.numerator =
|
frame->dwFrameInterval[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);
|
}
|
|
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_xu_control_mapping32 *p = (void *)kp;
|
compat_caddr_t info;
|
u32 count;
|
|
if (copy_from_user(p, up, sizeof(*p)))
|
return -EFAULT;
|
|
count = p->menu_count;
|
info = p->menu_info;
|
|
memset(kp->reserved, 0, sizeof(kp->reserved));
|
kp->menu_info = count ? compat_ptr(info) : NULL;
|
kp->menu_count = count;
|
return 0;
|
}
|
|
static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp,
|
struct uvc_xu_control_mapping32 __user *up)
|
{
|
if (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;
|
|
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)
|
{
|
struct uvc_xu_control_query32 v;
|
|
if (copy_from_user(&v, up, sizeof(v)))
|
return -EFAULT;
|
|
*kp = (struct uvc_xu_control_query){
|
.unit = v.unit,
|
.selector = v.selector,
|
.query = v.query,
|
.size = v.size,
|
.data = v.size ? compat_ptr(v.data) : NULL
|
};
|
return 0;
|
}
|
|
static int uvc_v4l2_put_xu_query(const struct uvc_xu_control_query *kp,
|
struct uvc_xu_control_query32 __user *up)
|
{
|
if (copy_to_user(up, kp, offsetof(typeof(*up), data)))
|
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)
|
{
|
struct uvc_fh *handle = file->private_data;
|
union {
|
struct uvc_xu_control_mapping xmap;
|
struct uvc_xu_control_query xqry;
|
} karg;
|
void __user *up = compat_ptr(arg);
|
long ret;
|
|
switch (cmd) {
|
case UVCIOC_CTRL_MAP32:
|
ret = uvc_v4l2_get_xu_mapping(&karg.xmap, up);
|
if (ret)
|
return ret;
|
ret = uvc_ioctl_ctrl_map(handle->chain, &karg.xmap);
|
if (ret)
|
return ret;
|
ret = uvc_v4l2_put_xu_mapping(&karg.xmap, up);
|
if (ret)
|
return ret;
|
|
break;
|
|
case UVCIOC_CTRL_QUERY32:
|
ret = uvc_v4l2_get_xu_query(&karg.xqry, up);
|
if (ret)
|
return ret;
|
ret = uvc_xu_ctrl_query(handle->chain, &karg.xqry);
|
if (ret)
|
return ret;
|
ret = uvc_v4l2_put_xu_query(&karg.xqry, up);
|
if (ret)
|
return ret;
|
break;
|
|
default:
|
return -ENOIOCTLCMD;
|
}
|
|
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 __poll_t 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_expbuf = uvc_ioctl_expbuf,
|
.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
|
};
|
