mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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60063497a9
This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1144 lines
28 KiB
C
1144 lines
28 KiB
C
/*
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* uvc_v4l2.c -- USB Video Class driver - V4L2 API
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*
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* Copyright (C) 2005-2010
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* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/version.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include <linux/videodev2.h>
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#include <linux/vmalloc.h>
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#include <linux/mm.h>
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#include <linux/wait.h>
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#include <linux/atomic.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-ioctl.h>
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#include "uvcvideo.h"
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/* ------------------------------------------------------------------------
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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,
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struct uvc_xu_control_mapping *xmap, int old)
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{
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struct uvc_control_mapping *map;
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unsigned int size;
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int ret;
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map = kzalloc(sizeof *map, GFP_KERNEL);
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if (map == NULL)
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return -ENOMEM;
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map->id = xmap->id;
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memcpy(map->name, xmap->name, sizeof map->name);
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memcpy(map->entity, xmap->entity, sizeof map->entity);
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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) {
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case V4L2_CTRL_TYPE_INTEGER:
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case V4L2_CTRL_TYPE_BOOLEAN:
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case V4L2_CTRL_TYPE_BUTTON:
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break;
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case V4L2_CTRL_TYPE_MENU:
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if (old) {
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uvc_trace(UVC_TRACE_CONTROL, "V4L2_CTRL_TYPE_MENU not "
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"supported for UVCIOC_CTRL_MAP_OLD.\n");
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ret = -EINVAL;
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goto done;
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}
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size = xmap->menu_count * sizeof(*map->menu_info);
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map->menu_info = kmalloc(size, GFP_KERNEL);
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if (map->menu_info == NULL) {
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ret = -ENOMEM;
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goto done;
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}
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if (copy_from_user(map->menu_info, xmap->menu_info, size)) {
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ret = -EFAULT;
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goto done;
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}
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map->menu_count = xmap->menu_count;
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break;
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default:
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uvc_trace(UVC_TRACE_CONTROL, "Unsupported V4L2 control type "
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"%u.\n", xmap->v4l2_type);
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ret = -EINVAL;
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goto done;
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}
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ret = uvc_ctrl_add_mapping(chain, map);
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done:
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kfree(map->menu_info);
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kfree(map);
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return ret;
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}
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/* ------------------------------------------------------------------------
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* V4L2 interface
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*/
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/*
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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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{
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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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}
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interval = frame->dwFrameInterval[i-1];
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} 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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}
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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)
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{
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struct uvc_format *format = NULL;
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struct uvc_frame *frame = NULL;
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__u16 rw, rh;
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unsigned int d, maxd;
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unsigned int i;
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__u32 interval;
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int ret = 0;
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__u8 *fcc;
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if (fmt->type != stream->type)
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return -EINVAL;
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fcc = (__u8 *)&fmt->fmt.pix.pixelformat;
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uvc_trace(UVC_TRACE_FORMAT, "Trying format 0x%08x (%c%c%c%c): %ux%u.\n",
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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);
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/* Check if the hardware supports the requested format. */
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for (i = 0; i < stream->nformats; ++i) {
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format = &stream->format[i];
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if (format->fcc == fmt->fmt.pix.pixelformat)
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break;
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}
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if (format == NULL || format->fcc != fmt->fmt.pix.pixelformat) {
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uvc_trace(UVC_TRACE_FORMAT, "Unsupported format 0x%08x.\n",
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fmt->fmt.pix.pixelformat);
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return -EINVAL;
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}
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/* Find the closest image size. The distance between image sizes is
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* the size in pixels of the non-overlapping regions between the
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* requested size and the frame-specified size.
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*/
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rw = fmt->fmt.pix.width;
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rh = fmt->fmt.pix.height;
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maxd = (unsigned int)-1;
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for (i = 0; i < format->nframes; ++i) {
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__u16 w = format->frame[i].wWidth;
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__u16 h = format->frame[i].wHeight;
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d = min(w, rw) * min(h, rh);
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d = w*h + rw*rh - 2*d;
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if (d < maxd) {
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maxd = d;
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frame = &format->frame[i];
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}
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if (maxd == 0)
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break;
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}
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if (frame == NULL) {
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uvc_trace(UVC_TRACE_FORMAT, "Unsupported size %ux%u.\n",
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fmt->fmt.pix.width, fmt->fmt.pix.height);
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return -EINVAL;
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}
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/* Use the default frame interval. */
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interval = frame->dwDefaultFrameInterval;
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uvc_trace(UVC_TRACE_FORMAT, "Using default frame interval %u.%u us "
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"(%u.%u fps).\n", interval/10, interval%10, 10000000/interval,
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(100000000/interval)%10);
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/* Set the format index, frame index and frame interval. */
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memset(probe, 0, sizeof *probe);
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probe->bmHint = 1; /* dwFrameInterval */
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probe->bFormatIndex = format->index;
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probe->bFrameIndex = frame->bFrameIndex;
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probe->dwFrameInterval = uvc_try_frame_interval(frame, interval);
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/* Some webcams stall the probe control set request when the
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* dwMaxVideoFrameSize field is set to zero. The UVC specification
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* clearly states that the field is read-only from the host, so this
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* is a webcam bug. Set dwMaxVideoFrameSize to the value reported by
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* the webcam to work around the problem.
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*
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* The workaround could probably be enabled for all webcams, so the
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* quirk can be removed if needed. It's currently useful to detect
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* webcam bugs and fix them before they hit the market (providing
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* developers test their webcams with the Linux driver as well as with
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* the Windows driver).
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*/
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mutex_lock(&stream->mutex);
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if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS)
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probe->dwMaxVideoFrameSize =
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stream->ctrl.dwMaxVideoFrameSize;
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/* Probe the device. */
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ret = uvc_probe_video(stream, probe);
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mutex_unlock(&stream->mutex);
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if (ret < 0)
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goto done;
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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 = format->bpp * frame->wWidth / 8;
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fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize;
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fmt->fmt.pix.colorspace = format->colorspace;
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fmt->fmt.pix.priv = 0;
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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;
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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 = format->bpp * frame->wWidth / 8;
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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.priv = 0;
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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;
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struct uvc_frame *frame;
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int ret;
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if (fmt->type != stream->type)
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return -EINVAL;
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ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame);
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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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memcpy(&stream->ctrl, &probe, sizeof probe);
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stream->cur_format = format;
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stream->cur_frame = frame;
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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_get_streamparm(struct uvc_streaming *stream,
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struct v4l2_streamparm *parm)
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{
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uint32_t numerator, denominator;
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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;
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mutex_unlock(&stream->mutex);
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denominator = 10000000;
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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;
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parm->parm.capture.timeperframe.denominator = denominator;
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parm->parm.capture.extendedmode = 0;
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parm->parm.capture.readbuffers = 0;
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} else {
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parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
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parm->parm.output.outputmode = 0;
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parm->parm.output.timeperframe.numerator = numerator;
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parm->parm.output.timeperframe.denominator = denominator;
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}
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return 0;
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}
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static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
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struct v4l2_streamparm *parm)
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{
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struct uvc_streaming_control probe;
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struct v4l2_fract timeperframe;
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uint32_t interval;
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int ret;
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if (parm->type != stream->type)
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return -EINVAL;
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if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
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timeperframe = parm->parm.capture.timeperframe;
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else
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timeperframe = parm->parm.output.timeperframe;
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interval = uvc_fraction_to_interval(timeperframe.numerator,
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timeperframe.denominator);
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uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n",
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timeperframe.numerator, timeperframe.denominator, interval);
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mutex_lock(&stream->mutex);
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if (uvc_queue_streaming(&stream->queue)) {
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mutex_unlock(&stream->mutex);
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return -EBUSY;
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}
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memcpy(&probe, &stream->ctrl, sizeof probe);
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probe.dwFrameInterval =
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uvc_try_frame_interval(stream->cur_frame, interval);
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|
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/* Probe the device with the new settings. */
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ret = uvc_probe_video(stream, &probe);
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if (ret < 0) {
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mutex_unlock(&stream->mutex);
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return ret;
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}
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|
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memcpy(&stream->ctrl, &probe, sizeof probe);
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mutex_unlock(&stream->mutex);
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|
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/* Return the actual frame period. */
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timeperframe.numerator = probe.dwFrameInterval;
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timeperframe.denominator = 10000000;
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uvc_simplify_fraction(&timeperframe.numerator,
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&timeperframe.denominator, 8, 333);
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|
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if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
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parm->parm.capture.timeperframe = timeperframe;
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else
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parm->parm.output.timeperframe = timeperframe;
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|
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return 0;
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}
|
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|
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/* ------------------------------------------------------------------------
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* Privilege management
|
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*/
|
|
|
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/*
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* Privilege management is the multiple-open implementation basis. The current
|
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* implementation is completely transparent for the end-user and doesn't
|
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* require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls.
|
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* Those ioctls enable finer control on the device (by making possible for a
|
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* user to request exclusive access to a device), but are not mature yet.
|
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* Switching to the V4L2 priority mechanism might be considered in the future
|
|
* if this situation changes.
|
|
*
|
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* Each open instance of a UVC device can either be in a privileged or
|
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* unprivileged state. Only a single instance can be in a privileged state at
|
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* a given time. Trying to perform an operation that requires privileges will
|
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* automatically acquire the required privileges if possible, or return -EBUSY
|
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* otherwise. Privileges are dismissed when closing the instance or when
|
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* freeing the video buffers using VIDIOC_REQBUFS.
|
|
*
|
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* Operations that require privileges are:
|
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*
|
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* - 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. */
|
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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;
|
|
}
|
|
}
|
|
|
|
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);
|
|
|
|
if (uvc_free_buffers(&stream->queue) < 0)
|
|
uvc_printk(KERN_ERR, "uvc_v4l2_release: Unable to "
|
|
"free buffers.\n");
|
|
}
|
|
|
|
/* Release the file handle. */
|
|
uvc_dismiss_privileges(handle);
|
|
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 void uvc_v4l2_ioctl_warn(void)
|
|
{
|
|
static int warned;
|
|
|
|
if (warned)
|
|
return;
|
|
|
|
uvc_printk(KERN_INFO, "Deprecated UVCIOC_CTRL_{ADD,MAP_OLD,GET,SET} "
|
|
"ioctls will be removed in 2.6.42.\n");
|
|
uvc_printk(KERN_INFO, "See http://www.ideasonboard.org/uvc/upgrade/ "
|
|
"for upgrade instructions.\n");
|
|
warned = 1;
|
|
}
|
|
|
|
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 = DRIVER_VERSION_NUMBER;
|
|
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(chain);
|
|
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(chain);
|
|
return ret;
|
|
}
|
|
ret = uvc_ctrl_commit(chain);
|
|
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(chain);
|
|
ctrls->error_idx = i;
|
|
return ret;
|
|
}
|
|
}
|
|
ctrls->error_idx = 0;
|
|
ret = uvc_ctrl_rollback(chain);
|
|
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(chain);
|
|
ctrls->error_idx = i;
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ctrls->error_idx = 0;
|
|
|
|
if (cmd == VIDIOC_S_EXT_CTRLS)
|
|
ret = uvc_ctrl_commit(chain);
|
|
else
|
|
ret = uvc_ctrl_rollback(chain);
|
|
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 (pin < 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:
|
|
{
|
|
struct v4l2_requestbuffers *rb = arg;
|
|
|
|
if (rb->type != stream->type ||
|
|
rb->memory != V4L2_MEMORY_MMAP)
|
|
return -EINVAL;
|
|
|
|
if ((ret = uvc_acquire_privileges(handle)) < 0)
|
|
return ret;
|
|
|
|
mutex_lock(&stream->mutex);
|
|
ret = uvc_alloc_buffers(&stream->queue, rb->count,
|
|
stream->ctrl.dwMaxVideoFrameSize);
|
|
mutex_unlock(&stream->mutex);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (ret == 0)
|
|
uvc_dismiss_privileges(handle);
|
|
|
|
rb->count = ret;
|
|
ret = 0;
|
|
break;
|
|
}
|
|
|
|
case VIDIOC_QUERYBUF:
|
|
{
|
|
struct v4l2_buffer *buf = arg;
|
|
|
|
if (buf->type != stream->type)
|
|
return -EINVAL;
|
|
|
|
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);
|
|
}
|
|
|
|
/* 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;
|
|
|
|
/* Dynamic controls. UVCIOC_CTRL_ADD, UVCIOC_CTRL_MAP_OLD,
|
|
* UVCIOC_CTRL_GET and UVCIOC_CTRL_SET are deprecated and scheduled for
|
|
* removal in 2.6.42.
|
|
*/
|
|
case __UVCIOC_CTRL_ADD:
|
|
uvc_v4l2_ioctl_warn();
|
|
return -EEXIST;
|
|
|
|
case __UVCIOC_CTRL_MAP_OLD:
|
|
uvc_v4l2_ioctl_warn();
|
|
case __UVCIOC_CTRL_MAP:
|
|
case UVCIOC_CTRL_MAP:
|
|
return uvc_ioctl_ctrl_map(chain, arg,
|
|
cmd == __UVCIOC_CTRL_MAP_OLD);
|
|
|
|
case __UVCIOC_CTRL_GET:
|
|
case __UVCIOC_CTRL_SET:
|
|
{
|
|
struct uvc_xu_control *xctrl = arg;
|
|
struct uvc_xu_control_query xqry = {
|
|
.unit = xctrl->unit,
|
|
.selector = xctrl->selector,
|
|
.query = cmd == __UVCIOC_CTRL_GET
|
|
? UVC_GET_CUR : UVC_SET_CUR,
|
|
.size = xctrl->size,
|
|
.data = xctrl->data,
|
|
};
|
|
|
|
uvc_v4l2_ioctl_warn();
|
|
return uvc_xu_ctrl_query(chain, &xqry);
|
|
}
|
|
|
|
case UVCIOC_CTRL_QUERY:
|
|
return uvc_xu_ctrl_query(chain, arg);
|
|
|
|
default:
|
|
uvc_trace(UVC_TRACE_IOCTL, "Unknown ioctl 0x%08x\n", cmd);
|
|
return -EINVAL;
|
|
}
|
|
|
|
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(cmd);
|
|
printk(")\n");
|
|
}
|
|
|
|
return video_usercopy(file, cmd, arg, uvc_v4l2_do_ioctl);
|
|
}
|
|
|
|
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,
|
|
.read = uvc_v4l2_read,
|
|
.mmap = uvc_v4l2_mmap,
|
|
.poll = uvc_v4l2_poll,
|
|
#ifndef CONFIG_MMU
|
|
.get_unmapped_area = uvc_v4l2_get_unmapped_area,
|
|
#endif
|
|
};
|
|
|