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1572 lines
39 KiB
1572 lines
39 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* uvc_v4l2.c -- USB Video Class driver - V4L2 API |
|
* |
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* Copyright (C) 2005-2010 |
|
* Laurent Pinchart ([email protected]) |
|
*/ |
|
|
|
#include <linux/compat.h> |
|
#include <linux/kernel.h> |
|
#include <linux/list.h> |
|
#include <linux/module.h> |
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#include <linux/slab.h> |
|
#include <linux/usb.h> |
|
#include <linux/videodev2.h> |
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#include <linux/vmalloc.h> |
|
#include <linux/mm.h> |
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#include <linux/wait.h> |
|
#include <linux/atomic.h> |
|
|
|
#include <media/v4l2-common.h> |
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#include <media/v4l2-ctrls.h> |
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#include <media/v4l2-event.h> |
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#include <media/v4l2-ioctl.h> |
|
|
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#include "uvcvideo.h" |
|
|
|
/* ------------------------------------------------------------------------ |
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* UVC ioctls |
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*/ |
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static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain, |
|
struct uvc_xu_control_mapping *xmap) |
|
{ |
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struct uvc_control_mapping *map; |
|
unsigned int size; |
|
int ret; |
|
|
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map = kzalloc(sizeof(*map), GFP_KERNEL); |
|
if (map == NULL) |
|
return -ENOMEM; |
|
|
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map->id = xmap->id; |
|
memcpy(map->name, xmap->name, sizeof(map->name)); |
|
memcpy(map->entity, xmap->entity, sizeof(map->entity)); |
|
map->selector = xmap->selector; |
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map->size = xmap->size; |
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map->offset = xmap->offset; |
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map->v4l2_type = xmap->v4l2_type; |
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map->data_type = xmap->data_type; |
|
|
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switch (xmap->v4l2_type) { |
|
case V4L2_CTRL_TYPE_INTEGER: |
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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); |
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map->menu_info = memdup_user(xmap->menu_info, size); |
|
if (IS_ERR(map->menu_info)) { |
|
ret = PTR_ERR(map->menu_info); |
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goto free_map; |
|
} |
|
|
|
map->menu_count = xmap->menu_count; |
|
break; |
|
|
|
default: |
|
uvc_dbg(chain->dev, 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); |
|
|
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return ret; |
|
} |
|
|
|
/* ------------------------------------------------------------------------ |
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* V4L2 interface |
|
*/ |
|
|
|
/* |
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* Find the frame interval closest to the requested frame interval for the |
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* given frame format and size. This should be done by the device as part of |
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* the Video Probe and Commit negotiation, but some hardware don't implement |
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* that feature. |
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*/ |
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static u32 uvc_try_frame_interval(struct uvc_frame *frame, u32 interval) |
|
{ |
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unsigned int i; |
|
|
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if (frame->bFrameIntervalType) { |
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u32 best = -1, dist; |
|
|
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for (i = 0; i < frame->bFrameIntervalType; ++i) { |
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dist = interval > frame->dwFrameInterval[i] |
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? interval - frame->dwFrameInterval[i] |
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: frame->dwFrameInterval[i] - interval; |
|
|
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if (dist > best) |
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break; |
|
|
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best = dist; |
|
} |
|
|
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interval = frame->dwFrameInterval[i-1]; |
|
} else { |
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const u32 min = frame->dwFrameInterval[0]; |
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const u32 max = frame->dwFrameInterval[1]; |
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const u32 step = frame->dwFrameInterval[2]; |
|
|
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interval = min + (interval - min + step/2) / step * step; |
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if (interval > max) |
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interval = max; |
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} |
|
|
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return interval; |
|
} |
|
|
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static u32 uvc_v4l2_get_bytesperline(const struct uvc_format *format, |
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const struct uvc_frame *frame) |
|
{ |
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switch (format->fcc) { |
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case V4L2_PIX_FMT_NV12: |
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case V4L2_PIX_FMT_YVU420: |
|
case V4L2_PIX_FMT_YUV420: |
|
case V4L2_PIX_FMT_M420: |
|
return frame->wWidth; |
|
|
|
default: |
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return format->bpp * frame->wWidth / 8; |
|
} |
|
} |
|
|
|
static int uvc_v4l2_try_format(struct uvc_streaming *stream, |
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struct v4l2_format *fmt, struct uvc_streaming_control *probe, |
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struct uvc_format **uvc_format, struct uvc_frame **uvc_frame) |
|
{ |
|
struct uvc_format *format = NULL; |
|
struct uvc_frame *frame = NULL; |
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u16 rw, rh; |
|
unsigned int d, maxd; |
|
unsigned int i; |
|
u32 interval; |
|
int ret = 0; |
|
u8 *fcc; |
|
|
|
if (fmt->type != stream->type) |
|
return -EINVAL; |
|
|
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fcc = (u8 *)&fmt->fmt.pix.pixelformat; |
|
uvc_dbg(stream->dev, FORMAT, "Trying format 0x%08x (%c%c%c%c): %ux%u\n", |
|
fmt->fmt.pix.pixelformat, |
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fcc[0], fcc[1], fcc[2], fcc[3], |
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fmt->fmt.pix.width, fmt->fmt.pix.height); |
|
|
|
/* Check if the hardware supports the requested format, use the default |
|
* format otherwise. |
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*/ |
|
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_dbg(stream->dev, 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_dbg(stream->dev, FORMAT, |
|
"Using default frame interval %u.%u us (%u.%u fps)\n", |
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interval / 10, interval % 10, 10000000 / interval, |
|
(100000000 / interval) % 10); |
|
|
|
/* Set the format index, frame index and frame interval. */ |
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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; |
|
} |
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} |
|
|
|
if (i == stream->nformats) |
|
uvc_dbg(stream->dev, FORMAT, |
|
"Unknown bFormatIndex %u, using default\n", |
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probe->bFormatIndex); |
|
|
|
for (i = 0; i < format->nframes; ++i) { |
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if (probe->bFrameIndex == format->frame[i].bFrameIndex) { |
|
frame = &format->frame[i]; |
|
break; |
|
} |
|
} |
|
|
|
if (i == format->nframes) |
|
uvc_dbg(stream->dev, FORMAT, |
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"Unknown bFrameIndex %u, using default\n", |
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probe->bFrameIndex); |
|
|
|
fmt->fmt.pix.width = frame->wWidth; |
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fmt->fmt.pix.height = frame->wHeight; |
|
fmt->fmt.pix.field = V4L2_FIELD_NONE; |
|
fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(format, frame); |
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fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize; |
|
fmt->fmt.pix.pixelformat = format->fcc; |
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fmt->fmt.pix.colorspace = format->colorspace; |
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fmt->fmt.pix.xfer_func = format->xfer_func; |
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fmt->fmt.pix.ycbcr_enc = format->ycbcr_enc; |
|
|
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if (uvc_format != NULL) |
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*uvc_format = format; |
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if (uvc_frame != NULL) |
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*uvc_frame = frame; |
|
|
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done: |
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return ret; |
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} |
|
|
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static int uvc_v4l2_get_format(struct uvc_streaming *stream, |
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struct v4l2_format *fmt) |
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{ |
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struct uvc_format *format; |
|
struct uvc_frame *frame; |
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int ret = 0; |
|
|
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if (fmt->type != stream->type) |
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return -EINVAL; |
|
|
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mutex_lock(&stream->mutex); |
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format = stream->cur_format; |
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frame = stream->cur_frame; |
|
|
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if (format == NULL || frame == NULL) { |
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ret = -EINVAL; |
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goto done; |
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} |
|
|
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fmt->fmt.pix.pixelformat = format->fcc; |
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fmt->fmt.pix.width = frame->wWidth; |
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fmt->fmt.pix.height = frame->wHeight; |
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fmt->fmt.pix.field = V4L2_FIELD_NONE; |
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fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(format, frame); |
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fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize; |
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fmt->fmt.pix.colorspace = format->colorspace; |
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fmt->fmt.pix.xfer_func = format->xfer_func; |
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fmt->fmt.pix.ycbcr_enc = format->ycbcr_enc; |
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|
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done: |
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mutex_unlock(&stream->mutex); |
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return ret; |
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} |
|
|
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static int uvc_v4l2_set_format(struct uvc_streaming *stream, |
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struct v4l2_format *fmt) |
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{ |
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struct uvc_streaming_control probe; |
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struct uvc_format *format; |
|
struct uvc_frame *frame; |
|
int ret; |
|
|
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if (fmt->type != stream->type) |
|
return -EINVAL; |
|
|
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ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame); |
|
if (ret < 0) |
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return ret; |
|
|
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mutex_lock(&stream->mutex); |
|
|
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if (uvc_queue_allocated(&stream->queue)) { |
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ret = -EBUSY; |
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goto done; |
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} |
|
|
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stream->ctrl = probe; |
|
stream->cur_format = format; |
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stream->cur_frame = frame; |
|
|
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done: |
|
mutex_unlock(&stream->mutex); |
|
return ret; |
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} |
|
|
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static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream, |
|
struct v4l2_streamparm *parm) |
|
{ |
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u32 numerator, denominator; |
|
|
|
if (parm->type != stream->type) |
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return -EINVAL; |
|
|
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mutex_lock(&stream->mutex); |
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numerator = stream->ctrl.dwFrameInterval; |
|
mutex_unlock(&stream->mutex); |
|
|
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denominator = 10000000; |
|
uvc_simplify_fraction(&numerator, &denominator, 8, 333); |
|
|
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memset(parm, 0, sizeof(*parm)); |
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parm->type = stream->type; |
|
|
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if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
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parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; |
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parm->parm.capture.capturemode = 0; |
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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 |
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timeperframe = parm->parm.output.timeperframe; |
|
|
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interval = uvc_fraction_to_interval(timeperframe.numerator, |
|
timeperframe.denominator); |
|
uvc_dbg(stream->dev, 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; |
|
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; |
|
|
|
stream = video_drvdata(file); |
|
uvc_dbg(stream->dev, CALLS, "%s\n", __func__); |
|
|
|
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_dbg(stream->dev, CALLS, "%s\n", __func__); |
|
|
|
/* 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; |
|
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; |
|
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) |
|
{ |
|
struct uvc_fh *handle = file->private_data; |
|
struct uvc_streaming *stream = handle->stream; |
|
|
|
uvc_dbg(stream->dev, CALLS, "%s: not implemented\n", __func__); |
|
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_dbg(stream->dev, CALLS, "%s\n", __func__); |
|
|
|
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_dbg(stream->dev, CALLS, "%s\n", __func__); |
|
|
|
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_dbg(stream->dev, CALLS, "%s\n", __func__); |
|
|
|
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 |
|
}; |
|
|
|
|