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authorMauro Carvalho Chehab <mchehab@redhat.com>2012-08-14 00:13:22 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-08-15 16:25:07 -0300
commit0c0d06cac63ee327ceaab4b5ffe2206574ab86bd (patch)
treee759f0dc3185d97f2a0c6b5cd5e32ea6faa74d40 /drivers/media/video/uvc/uvc_v4l2.c
parent84cfe9e79bd5ac11c963f4841158454fefa872f6 (diff)
[media] rename most media/video usb drivers to media/usb
Rename all USB drivers with their own directory under drivers/media/video into drivers/media/usb and update the building system. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/uvc/uvc_v4l2.c')
-rw-r--r--drivers/media/video/uvc/uvc_v4l2.c1317
1 files changed, 0 insertions, 1317 deletions
diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c
deleted file mode 100644
index f00db3060e0e..000000000000
--- a/drivers/media/video/uvc/uvc_v4l2.c
+++ /dev/null
@@ -1,1317 +0,0 @@
-/*
- * uvc_v4l2.c -- USB Video Class driver - V4L2 API
- *
- * Copyright (C) 2005-2010
- * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- */
-
-#include <linux/compat.h>
-#include <linux/kernel.h>
-#include <linux/version.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-#include <linux/videodev2.h>
-#include <linux/vmalloc.h>
-#include <linux/mm.h>
-#include <linux/wait.h>
-#include <linux/atomic.h>
-
-#include <media/v4l2-common.h>
-#include <media/v4l2-ctrls.h>
-#include <media/v4l2-event.h>
-#include <media/v4l2-ioctl.h>
-
-#include "uvcvideo.h"
-
-/* ------------------------------------------------------------------------
- * UVC ioctls
- */
-static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain,
- struct uvc_xu_control_mapping *xmap)
-{
- struct uvc_control_mapping *map;
- unsigned int size;
- int ret;
-
- map = kzalloc(sizeof *map, GFP_KERNEL);
- if (map == NULL)
- return -ENOMEM;
-
- map->id = xmap->id;
- memcpy(map->name, xmap->name, sizeof map->name);
- memcpy(map->entity, xmap->entity, sizeof map->entity);
- map->selector = xmap->selector;
- map->size = xmap->size;
- map->offset = xmap->offset;
- map->v4l2_type = xmap->v4l2_type;
- map->data_type = xmap->data_type;
-
- switch (xmap->v4l2_type) {
- case V4L2_CTRL_TYPE_INTEGER:
- case V4L2_CTRL_TYPE_BOOLEAN:
- case V4L2_CTRL_TYPE_BUTTON:
- break;
-
- case V4L2_CTRL_TYPE_MENU:
- /* Prevent excessive memory consumption, as well as integer
- * overflows.
- */
- if (xmap->menu_count == 0 ||
- xmap->menu_count > UVC_MAX_CONTROL_MENU_ENTRIES) {
- ret = -EINVAL;
- goto done;
- }
-
- size = xmap->menu_count * sizeof(*map->menu_info);
- map->menu_info = kmalloc(size, GFP_KERNEL);
- if (map->menu_info == NULL) {
- ret = -ENOMEM;
- goto done;
- }
-
- if (copy_from_user(map->menu_info, xmap->menu_info, size)) {
- ret = -EFAULT;
- goto done;
- }
-
- map->menu_count = xmap->menu_count;
- break;
-
- default:
- uvc_trace(UVC_TRACE_CONTROL, "Unsupported V4L2 control type "
- "%u.\n", xmap->v4l2_type);
- ret = -ENOTTY;
- goto done;
- }
-
- ret = uvc_ctrl_add_mapping(chain, map);
-
-done:
- kfree(map->menu_info);
- kfree(map);
-
- return ret;
-}
-
-/* ------------------------------------------------------------------------
- * V4L2 interface
- */
-
-/*
- * Find the frame interval closest to the requested frame interval for the
- * given frame format and size. This should be done by the device as part of
- * the Video Probe and Commit negotiation, but some hardware don't implement
- * that feature.
- */
-static __u32 uvc_try_frame_interval(struct uvc_frame *frame, __u32 interval)
-{
- unsigned int i;
-
- if (frame->bFrameIntervalType) {
- __u32 best = -1, dist;
-
- for (i = 0; i < frame->bFrameIntervalType; ++i) {
- dist = interval > frame->dwFrameInterval[i]
- ? interval - frame->dwFrameInterval[i]
- : frame->dwFrameInterval[i] - interval;
-
- if (dist > best)
- break;
-
- best = dist;
- }
-
- interval = frame->dwFrameInterval[i-1];
- } else {
- const __u32 min = frame->dwFrameInterval[0];
- const __u32 max = frame->dwFrameInterval[1];
- const __u32 step = frame->dwFrameInterval[2];
-
- interval = min + (interval - min + step/2) / step * step;
- if (interval > max)
- interval = max;
- }
-
- return interval;
-}
-
-static int uvc_v4l2_try_format(struct uvc_streaming *stream,
- struct v4l2_format *fmt, struct uvc_streaming_control *probe,
- struct uvc_format **uvc_format, struct uvc_frame **uvc_frame)
-{
- struct uvc_format *format = NULL;
- struct uvc_frame *frame = NULL;
- __u16 rw, rh;
- unsigned int d, maxd;
- unsigned int i;
- __u32 interval;
- int ret = 0;
- __u8 *fcc;
-
- if (fmt->type != stream->type)
- return -EINVAL;
-
- fcc = (__u8 *)&fmt->fmt.pix.pixelformat;
- uvc_trace(UVC_TRACE_FORMAT, "Trying format 0x%08x (%c%c%c%c): %ux%u.\n",
- fmt->fmt.pix.pixelformat,
- fcc[0], fcc[1], fcc[2], fcc[3],
- fmt->fmt.pix.width, fmt->fmt.pix.height);
-
- /* Check if the hardware supports the requested format. */
- for (i = 0; i < stream->nformats; ++i) {
- format = &stream->format[i];
- if (format->fcc == fmt->fmt.pix.pixelformat)
- break;
- }
-
- if (format == NULL || format->fcc != fmt->fmt.pix.pixelformat) {
- uvc_trace(UVC_TRACE_FORMAT, "Unsupported format 0x%08x.\n",
- fmt->fmt.pix.pixelformat);
- return -EINVAL;
- }
-
- /* Find the closest image size. The distance between image sizes is
- * the size in pixels of the non-overlapping regions between the
- * requested size and the frame-specified size.
- */
- rw = fmt->fmt.pix.width;
- rh = fmt->fmt.pix.height;
- maxd = (unsigned int)-1;
-
- for (i = 0; i < format->nframes; ++i) {
- __u16 w = format->frame[i].wWidth;
- __u16 h = format->frame[i].wHeight;
-
- d = min(w, rw) * min(h, rh);
- d = w*h + rw*rh - 2*d;
- if (d < maxd) {
- maxd = d;
- frame = &format->frame[i];
- }
-
- if (maxd == 0)
- break;
- }
-
- if (frame == NULL) {
- uvc_trace(UVC_TRACE_FORMAT, "Unsupported size %ux%u.\n",
- fmt->fmt.pix.width, fmt->fmt.pix.height);
- return -EINVAL;
- }
-
- /* Use the default frame interval. */
- interval = frame->dwDefaultFrameInterval;
- uvc_trace(UVC_TRACE_FORMAT, "Using default frame interval %u.%u us "
- "(%u.%u fps).\n", interval/10, interval%10, 10000000/interval,
- (100000000/interval)%10);
-
- /* Set the format index, frame index and frame interval. */
- memset(probe, 0, sizeof *probe);
- probe->bmHint = 1; /* dwFrameInterval */
- probe->bFormatIndex = format->index;
- probe->bFrameIndex = frame->bFrameIndex;
- probe->dwFrameInterval = uvc_try_frame_interval(frame, interval);
- /* Some webcams stall the probe control set request when the
- * dwMaxVideoFrameSize field is set to zero. The UVC specification
- * clearly states that the field is read-only from the host, so this
- * is a webcam bug. Set dwMaxVideoFrameSize to the value reported by
- * the webcam to work around the problem.
- *
- * The workaround could probably be enabled for all webcams, so the
- * quirk can be removed if needed. It's currently useful to detect
- * webcam bugs and fix them before they hit the market (providing
- * developers test their webcams with the Linux driver as well as with
- * the Windows driver).
- */
- mutex_lock(&stream->mutex);
- if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS)
- probe->dwMaxVideoFrameSize =
- stream->ctrl.dwMaxVideoFrameSize;
-
- /* Probe the device. */
- ret = uvc_probe_video(stream, probe);
- mutex_unlock(&stream->mutex);
- if (ret < 0)
- goto done;
-
- fmt->fmt.pix.width = frame->wWidth;
- fmt->fmt.pix.height = frame->wHeight;
- fmt->fmt.pix.field = V4L2_FIELD_NONE;
- fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8;
- fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize;
- fmt->fmt.pix.colorspace = format->colorspace;
- fmt->fmt.pix.priv = 0;
-
- if (uvc_format != NULL)
- *uvc_format = format;
- if (uvc_frame != NULL)
- *uvc_frame = frame;
-
-done:
- return ret;
-}
-
-static int uvc_v4l2_get_format(struct uvc_streaming *stream,
- struct v4l2_format *fmt)
-{
- struct uvc_format *format;
- struct uvc_frame *frame;
- int ret = 0;
-
- if (fmt->type != stream->type)
- return -EINVAL;
-
- mutex_lock(&stream->mutex);
- format = stream->cur_format;
- frame = stream->cur_frame;
-
- if (format == NULL || frame == NULL) {
- ret = -EINVAL;
- goto done;
- }
-
- fmt->fmt.pix.pixelformat = format->fcc;
- fmt->fmt.pix.width = frame->wWidth;
- fmt->fmt.pix.height = frame->wHeight;
- fmt->fmt.pix.field = V4L2_FIELD_NONE;
- fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8;
- fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize;
- fmt->fmt.pix.colorspace = format->colorspace;
- fmt->fmt.pix.priv = 0;
-
-done:
- mutex_unlock(&stream->mutex);
- return ret;
-}
-
-static int uvc_v4l2_set_format(struct uvc_streaming *stream,
- struct v4l2_format *fmt)
-{
- struct uvc_streaming_control probe;
- struct uvc_format *format;
- struct uvc_frame *frame;
- int ret;
-
- if (fmt->type != stream->type)
- return -EINVAL;
-
- ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame);
- if (ret < 0)
- return ret;
-
- mutex_lock(&stream->mutex);
-
- if (uvc_queue_allocated(&stream->queue)) {
- ret = -EBUSY;
- goto done;
- }
-
- memcpy(&stream->ctrl, &probe, sizeof probe);
- stream->cur_format = format;
- stream->cur_frame = frame;
-
-done:
- mutex_unlock(&stream->mutex);
- return ret;
-}
-
-static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream,
- struct v4l2_streamparm *parm)
-{
- uint32_t numerator, denominator;
-
- if (parm->type != stream->type)
- return -EINVAL;
-
- mutex_lock(&stream->mutex);
- numerator = stream->ctrl.dwFrameInterval;
- mutex_unlock(&stream->mutex);
-
- denominator = 10000000;
- uvc_simplify_fraction(&numerator, &denominator, 8, 333);
-
- memset(parm, 0, sizeof *parm);
- parm->type = stream->type;
-
- if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
- parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
- parm->parm.capture.capturemode = 0;
- parm->parm.capture.timeperframe.numerator = numerator;
- parm->parm.capture.timeperframe.denominator = denominator;
- parm->parm.capture.extendedmode = 0;
- parm->parm.capture.readbuffers = 0;
- } else {
- parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
- parm->parm.output.outputmode = 0;
- parm->parm.output.timeperframe.numerator = numerator;
- parm->parm.output.timeperframe.denominator = denominator;
- }
-
- return 0;
-}
-
-static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
- struct v4l2_streamparm *parm)
-{
- struct uvc_streaming_control probe;
- struct v4l2_fract timeperframe;
- uint32_t interval;
- int ret;
-
- if (parm->type != stream->type)
- return -EINVAL;
-
- if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
- timeperframe = parm->parm.capture.timeperframe;
- else
- timeperframe = parm->parm.output.timeperframe;
-
- interval = uvc_fraction_to_interval(timeperframe.numerator,
- timeperframe.denominator);
- uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n",
- timeperframe.numerator, timeperframe.denominator, interval);
-
- mutex_lock(&stream->mutex);
-
- if (uvc_queue_streaming(&stream->queue)) {
- mutex_unlock(&stream->mutex);
- return -EBUSY;
- }
-
- memcpy(&probe, &stream->ctrl, sizeof probe);
- probe.dwFrameInterval =
- uvc_try_frame_interval(stream->cur_frame, interval);
-
- /* Probe the device with the new settings. */
- ret = uvc_probe_video(stream, &probe);
- if (ret < 0) {
- mutex_unlock(&stream->mutex);
- return ret;
- }
-
- memcpy(&stream->ctrl, &probe, sizeof probe);
- mutex_unlock(&stream->mutex);
-
- /* Return the actual frame period. */
- timeperframe.numerator = probe.dwFrameInterval;
- timeperframe.denominator = 10000000;
- uvc_simplify_fraction(&timeperframe.numerator,
- &timeperframe.denominator, 8, 333);
-
- if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
- parm->parm.capture.timeperframe = timeperframe;
- else
- parm->parm.output.timeperframe = timeperframe;
-
- return 0;
-}
-
-/* ------------------------------------------------------------------------
- * Privilege management
- */
-
-/*
- * Privilege management is the multiple-open implementation basis. The current
- * implementation is completely transparent for the end-user and doesn't
- * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls.
- * Those ioctls enable finer control on the device (by making possible for a
- * user to request exclusive access to a device), but are not mature yet.
- * Switching to the V4L2 priority mechanism might be considered in the future
- * if this situation changes.
- *
- * Each open instance of a UVC device can either be in a privileged or
- * unprivileged state. Only a single instance can be in a privileged state at
- * a given time. Trying to perform an operation that requires privileges will
- * automatically acquire the required privileges if possible, or return -EBUSY
- * otherwise. Privileges are dismissed when closing the instance or when
- * freeing the video buffers using VIDIOC_REQBUFS.
- *
- * Operations that require privileges are:
- *
- * - VIDIOC_S_INPUT
- * - VIDIOC_S_PARM
- * - VIDIOC_S_FMT
- * - VIDIOC_REQBUFS
- */
-static int uvc_acquire_privileges(struct uvc_fh *handle)
-{
- /* Always succeed if the handle is already privileged. */
- if (handle->state == UVC_HANDLE_ACTIVE)
- return 0;
-
- /* Check if the device already has a privileged handle. */
- if (atomic_inc_return(&handle->stream->active) != 1) {
- atomic_dec(&handle->stream->active);
- return -EBUSY;
- }
-
- handle->state = UVC_HANDLE_ACTIVE;
- return 0;
-}
-
-static void uvc_dismiss_privileges(struct uvc_fh *handle)
-{
- if (handle->state == UVC_HANDLE_ACTIVE)
- atomic_dec(&handle->stream->active);
-
- handle->state = UVC_HANDLE_PASSIVE;
-}
-
-static int uvc_has_privileges(struct uvc_fh *handle)
-{
- return handle->state == UVC_HANDLE_ACTIVE;
-}
-
-/* ------------------------------------------------------------------------
- * V4L2 file operations
- */
-
-static int uvc_v4l2_open(struct file *file)
-{
- struct uvc_streaming *stream;
- struct uvc_fh *handle;
- int ret = 0;
-
- uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n");
- stream = video_drvdata(file);
-
- if (stream->dev->state & UVC_DEV_DISCONNECTED)
- return -ENODEV;
-
- ret = usb_autopm_get_interface(stream->dev->intf);
- if (ret < 0)
- return ret;
-
- /* Create the device handle. */
- handle = kzalloc(sizeof *handle, GFP_KERNEL);
- if (handle == NULL) {
- usb_autopm_put_interface(stream->dev->intf);
- return -ENOMEM;
- }
-
- if (atomic_inc_return(&stream->dev->users) == 1) {
- ret = uvc_status_start(stream->dev);
- if (ret < 0) {
- usb_autopm_put_interface(stream->dev->intf);
- atomic_dec(&stream->dev->users);
- kfree(handle);
- return ret;
- }
- }
-
- v4l2_fh_init(&handle->vfh, stream->vdev);
- v4l2_fh_add(&handle->vfh);
- handle->chain = stream->chain;
- handle->stream = stream;
- handle->state = UVC_HANDLE_PASSIVE;
- file->private_data = handle;
-
- return 0;
-}
-
-static int uvc_v4l2_release(struct file *file)
-{
- struct uvc_fh *handle = file->private_data;
- struct uvc_streaming *stream = handle->stream;
-
- uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_release\n");
-
- /* Only free resources if this is a privileged handle. */
- if (uvc_has_privileges(handle)) {
- uvc_video_enable(stream, 0);
- uvc_free_buffers(&stream->queue);
- }
-
- /* Release the file handle. */
- uvc_dismiss_privileges(handle);
- v4l2_fh_del(&handle->vfh);
- v4l2_fh_exit(&handle->vfh);
- kfree(handle);
- file->private_data = NULL;
-
- if (atomic_dec_return(&stream->dev->users) == 0)
- uvc_status_stop(stream->dev);
-
- usb_autopm_put_interface(stream->dev->intf);
- return 0;
-}
-
-static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
-{
- struct video_device *vdev = video_devdata(file);
- struct uvc_fh *handle = file->private_data;
- struct uvc_video_chain *chain = handle->chain;
- struct uvc_streaming *stream = handle->stream;
- long ret = 0;
-
- switch (cmd) {
- /* Query capabilities */
- case VIDIOC_QUERYCAP:
- {
- struct v4l2_capability *cap = arg;
-
- memset(cap, 0, sizeof *cap);
- strlcpy(cap->driver, "uvcvideo", sizeof cap->driver);
- strlcpy(cap->card, vdev->name, sizeof cap->card);
- usb_make_path(stream->dev->udev,
- cap->bus_info, sizeof(cap->bus_info));
- cap->version = LINUX_VERSION_CODE;
- if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
- cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
- | V4L2_CAP_STREAMING;
- else
- cap->capabilities = V4L2_CAP_VIDEO_OUTPUT
- | V4L2_CAP_STREAMING;
- break;
- }
-
- /* Get, Set & Query control */
- case VIDIOC_QUERYCTRL:
- return uvc_query_v4l2_ctrl(chain, arg);
-
- case VIDIOC_G_CTRL:
- {
- struct v4l2_control *ctrl = arg;
- struct v4l2_ext_control xctrl;
-
- memset(&xctrl, 0, sizeof xctrl);
- xctrl.id = ctrl->id;
-
- ret = uvc_ctrl_begin(chain);
- if (ret < 0)
- return ret;
-
- ret = uvc_ctrl_get(chain, &xctrl);
- uvc_ctrl_rollback(handle);
- if (ret >= 0)
- ctrl->value = xctrl.value;
- break;
- }
-
- case VIDIOC_S_CTRL:
- {
- struct v4l2_control *ctrl = arg;
- struct v4l2_ext_control xctrl;
-
- memset(&xctrl, 0, sizeof xctrl);
- xctrl.id = ctrl->id;
- xctrl.value = ctrl->value;
-
- ret = uvc_ctrl_begin(chain);
- if (ret < 0)
- return ret;
-
- ret = uvc_ctrl_set(chain, &xctrl);
- if (ret < 0) {
- uvc_ctrl_rollback(handle);
- return ret;
- }
- ret = uvc_ctrl_commit(handle, &xctrl, 1);
- if (ret == 0)
- ctrl->value = xctrl.value;
- break;
- }
-
- case VIDIOC_QUERYMENU:
- return uvc_query_v4l2_menu(chain, arg);
-
- case VIDIOC_G_EXT_CTRLS:
- {
- struct v4l2_ext_controls *ctrls = arg;
- struct v4l2_ext_control *ctrl = ctrls->controls;
- unsigned int i;
-
- ret = uvc_ctrl_begin(chain);
- if (ret < 0)
- return ret;
-
- for (i = 0; i < ctrls->count; ++ctrl, ++i) {
- ret = uvc_ctrl_get(chain, ctrl);
- if (ret < 0) {
- uvc_ctrl_rollback(handle);
- ctrls->error_idx = i;
- return ret;
- }
- }
- ctrls->error_idx = 0;
- ret = uvc_ctrl_rollback(handle);
- break;
- }
-
- case VIDIOC_S_EXT_CTRLS:
- case VIDIOC_TRY_EXT_CTRLS:
- {
- struct v4l2_ext_controls *ctrls = arg;
- struct v4l2_ext_control *ctrl = ctrls->controls;
- unsigned int i;
-
- ret = uvc_ctrl_begin(chain);
- if (ret < 0)
- return ret;
-
- for (i = 0; i < ctrls->count; ++ctrl, ++i) {
- ret = uvc_ctrl_set(chain, ctrl);
- if (ret < 0) {
- uvc_ctrl_rollback(handle);
- ctrls->error_idx = i;
- return ret;
- }
- }
-
- ctrls->error_idx = 0;
-
- if (cmd == VIDIOC_S_EXT_CTRLS)
- ret = uvc_ctrl_commit(handle,
- ctrls->controls, ctrls->count);
- else
- ret = uvc_ctrl_rollback(handle);
- break;
- }
-
- /* Get, Set & Enum input */
- case VIDIOC_ENUMINPUT:
- {
- const struct uvc_entity *selector = chain->selector;
- struct v4l2_input *input = arg;
- struct uvc_entity *iterm = NULL;
- u32 index = input->index;
- int pin = 0;
-
- if (selector == NULL ||
- (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
- if (index != 0)
- return -EINVAL;
- list_for_each_entry(iterm, &chain->entities, chain) {
- if (UVC_ENTITY_IS_ITERM(iterm))
- break;
- }
- pin = iterm->id;
- } else if (index < selector->bNrInPins) {
- pin = selector->baSourceID[index];
- list_for_each_entry(iterm, &chain->entities, chain) {
- if (!UVC_ENTITY_IS_ITERM(iterm))
- continue;
- if (iterm->id == pin)
- break;
- }
- }
-
- if (iterm == NULL || iterm->id != pin)
- return -EINVAL;
-
- memset(input, 0, sizeof *input);
- input->index = index;
- strlcpy(input->name, iterm->name, sizeof input->name);
- if (UVC_ENTITY_TYPE(iterm) == UVC_ITT_CAMERA)
- input->type = V4L2_INPUT_TYPE_CAMERA;
- break;
- }
-
- case VIDIOC_G_INPUT:
- {
- u8 input;
-
- if (chain->selector == NULL ||
- (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
- *(int *)arg = 0;
- break;
- }
-
- ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR,
- chain->selector->id, chain->dev->intfnum,
- UVC_SU_INPUT_SELECT_CONTROL, &input, 1);
- if (ret < 0)
- return ret;
-
- *(int *)arg = input - 1;
- break;
- }
-
- case VIDIOC_S_INPUT:
- {
- u32 input = *(u32 *)arg + 1;
-
- if ((ret = uvc_acquire_privileges(handle)) < 0)
- return ret;
-
- if (chain->selector == NULL ||
- (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
- if (input != 1)
- return -EINVAL;
- break;
- }
-
- if (input == 0 || input > chain->selector->bNrInPins)
- return -EINVAL;
-
- return uvc_query_ctrl(chain->dev, UVC_SET_CUR,
- chain->selector->id, chain->dev->intfnum,
- UVC_SU_INPUT_SELECT_CONTROL, &input, 1);
- }
-
- /* Try, Get, Set & Enum format */
- case VIDIOC_ENUM_FMT:
- {
- struct v4l2_fmtdesc *fmt = arg;
- struct uvc_format *format;
- enum v4l2_buf_type type = fmt->type;
- __u32 index = fmt->index;
-
- if (fmt->type != stream->type ||
- fmt->index >= stream->nformats)
- return -EINVAL;
-
- memset(fmt, 0, sizeof(*fmt));
- fmt->index = index;
- fmt->type = type;
-
- format = &stream->format[fmt->index];
- fmt->flags = 0;
- if (format->flags & UVC_FMT_FLAG_COMPRESSED)
- fmt->flags |= V4L2_FMT_FLAG_COMPRESSED;
- strlcpy(fmt->description, format->name,
- sizeof fmt->description);
- fmt->description[sizeof fmt->description - 1] = 0;
- fmt->pixelformat = format->fcc;
- break;
- }
-
- case VIDIOC_TRY_FMT:
- {
- struct uvc_streaming_control probe;
-
- return uvc_v4l2_try_format(stream, arg, &probe, NULL, NULL);
- }
-
- case VIDIOC_S_FMT:
- if ((ret = uvc_acquire_privileges(handle)) < 0)
- return ret;
-
- return uvc_v4l2_set_format(stream, arg);
-
- case VIDIOC_G_FMT:
- return uvc_v4l2_get_format(stream, arg);
-
- /* Frame size enumeration */
- case VIDIOC_ENUM_FRAMESIZES:
- {
- struct v4l2_frmsizeenum *fsize = arg;
- struct uvc_format *format = NULL;
- struct uvc_frame *frame;
- int i;
-
- /* Look for the given pixel format */
- for (i = 0; i < stream->nformats; i++) {
- if (stream->format[i].fcc ==
- fsize->pixel_format) {
- format = &stream->format[i];
- break;
- }
- }
- if (format == NULL)
- return -EINVAL;
-
- if (fsize->index >= format->nframes)
- return -EINVAL;
-
- frame = &format->frame[fsize->index];
- fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
- fsize->discrete.width = frame->wWidth;
- fsize->discrete.height = frame->wHeight;
- break;
- }
-
- /* Frame interval enumeration */
- case VIDIOC_ENUM_FRAMEINTERVALS:
- {
- struct v4l2_frmivalenum *fival = arg;
- struct uvc_format *format = NULL;
- struct uvc_frame *frame = NULL;
- int i;
-
- /* Look for the given pixel format and frame size */
- for (i = 0; i < stream->nformats; i++) {
- if (stream->format[i].fcc ==
- fival->pixel_format) {
- format = &stream->format[i];
- break;
- }
- }
- if (format == NULL)
- return -EINVAL;
-
- for (i = 0; i < format->nframes; i++) {
- if (format->frame[i].wWidth == fival->width &&
- format->frame[i].wHeight == fival->height) {
- frame = &format->frame[i];
- break;
- }
- }
- if (frame == NULL)
- return -EINVAL;
-
- if (frame->bFrameIntervalType) {
- if (fival->index >= frame->bFrameIntervalType)
- return -EINVAL;
-
- fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
- fival->discrete.numerator =
- frame->dwFrameInterval[fival->index];
- fival->discrete.denominator = 10000000;
- uvc_simplify_fraction(&fival->discrete.numerator,
- &fival->discrete.denominator, 8, 333);
- } else {
- fival->type = V4L2_FRMIVAL_TYPE_STEPWISE;
- fival->stepwise.min.numerator =
- frame->dwFrameInterval[0];
- fival->stepwise.min.denominator = 10000000;
- fival->stepwise.max.numerator =
- frame->dwFrameInterval[1];
- fival->stepwise.max.denominator = 10000000;
- fival->stepwise.step.numerator =
- frame->dwFrameInterval[2];
- fival->stepwise.step.denominator = 10000000;
- uvc_simplify_fraction(&fival->stepwise.min.numerator,
- &fival->stepwise.min.denominator, 8, 333);
- uvc_simplify_fraction(&fival->stepwise.max.numerator,
- &fival->stepwise.max.denominator, 8, 333);
- uvc_simplify_fraction(&fival->stepwise.step.numerator,
- &fival->stepwise.step.denominator, 8, 333);
- }
- break;
- }
-
- /* Get & Set streaming parameters */
- case VIDIOC_G_PARM:
- return uvc_v4l2_get_streamparm(stream, arg);
-
- case VIDIOC_S_PARM:
- if ((ret = uvc_acquire_privileges(handle)) < 0)
- return ret;
-
- return uvc_v4l2_set_streamparm(stream, arg);
-
- /* Cropping and scaling */
- case VIDIOC_CROPCAP:
- {
- struct v4l2_cropcap *ccap = arg;
-
- if (ccap->type != stream->type)
- return -EINVAL;
-
- ccap->bounds.left = 0;
- ccap->bounds.top = 0;
-
- mutex_lock(&stream->mutex);
- ccap->bounds.width = stream->cur_frame->wWidth;
- ccap->bounds.height = stream->cur_frame->wHeight;
- mutex_unlock(&stream->mutex);
-
- ccap->defrect = ccap->bounds;
-
- ccap->pixelaspect.numerator = 1;
- ccap->pixelaspect.denominator = 1;
- break;
- }
-
- case VIDIOC_G_CROP:
- case VIDIOC_S_CROP:
- return -EINVAL;
-
- /* Buffers & streaming */
- case VIDIOC_REQBUFS:
- if ((ret = uvc_acquire_privileges(handle)) < 0)
- return ret;
-
- mutex_lock(&stream->mutex);
- ret = uvc_alloc_buffers(&stream->queue, arg);
- mutex_unlock(&stream->mutex);
- if (ret < 0)
- return ret;
-
- if (ret == 0)
- uvc_dismiss_privileges(handle);
-
- ret = 0;
- break;
-
- case VIDIOC_QUERYBUF:
- {
- struct v4l2_buffer *buf = arg;
-
- if (!uvc_has_privileges(handle))
- return -EBUSY;
-
- return uvc_query_buffer(&stream->queue, buf);
- }
-
- case VIDIOC_QBUF:
- if (!uvc_has_privileges(handle))
- return -EBUSY;
-
- return uvc_queue_buffer(&stream->queue, arg);
-
- case VIDIOC_DQBUF:
- if (!uvc_has_privileges(handle))
- return -EBUSY;
-
- return uvc_dequeue_buffer(&stream->queue, arg,
- file->f_flags & O_NONBLOCK);
-
- case VIDIOC_STREAMON:
- {
- int *type = arg;
-
- if (*type != stream->type)
- return -EINVAL;
-
- if (!uvc_has_privileges(handle))
- return -EBUSY;
-
- mutex_lock(&stream->mutex);
- ret = uvc_video_enable(stream, 1);
- mutex_unlock(&stream->mutex);
- if (ret < 0)
- return ret;
- break;
- }
-
- case VIDIOC_STREAMOFF:
- {
- int *type = arg;
-
- if (*type != stream->type)
- return -EINVAL;
-
- if (!uvc_has_privileges(handle))
- return -EBUSY;
-
- return uvc_video_enable(stream, 0);
- }
-
- case VIDIOC_SUBSCRIBE_EVENT:
- {
- struct v4l2_event_subscription *sub = arg;
-
- switch (sub->type) {
- case V4L2_EVENT_CTRL:
- return v4l2_event_subscribe(&handle->vfh, sub, 0,
- &uvc_ctrl_sub_ev_ops);
- default:
- return -EINVAL;
- }
- }
-
- case VIDIOC_UNSUBSCRIBE_EVENT:
- return v4l2_event_unsubscribe(&handle->vfh, arg);
-
- case VIDIOC_DQEVENT:
- return v4l2_event_dequeue(&handle->vfh, arg,
- file->f_flags & O_NONBLOCK);
-
- /* Analog video standards make no sense for digital cameras. */
- case VIDIOC_ENUMSTD:
- case VIDIOC_QUERYSTD:
- case VIDIOC_G_STD:
- case VIDIOC_S_STD:
-
- case VIDIOC_OVERLAY:
-
- case VIDIOC_ENUMAUDIO:
- case VIDIOC_ENUMAUDOUT:
-
- case VIDIOC_ENUMOUTPUT:
- uvc_trace(UVC_TRACE_IOCTL, "Unsupported ioctl 0x%08x\n", cmd);
- return -EINVAL;
-
- case UVCIOC_CTRL_MAP:
- return uvc_ioctl_ctrl_map(chain, arg);
-
- case UVCIOC_CTRL_QUERY:
- return uvc_xu_ctrl_query(chain, arg);
-
- default:
- uvc_trace(UVC_TRACE_IOCTL, "Unknown ioctl 0x%08x\n", cmd);
- return -ENOTTY;
- }
-
- return ret;
-}
-
-static long uvc_v4l2_ioctl(struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- if (uvc_trace_param & UVC_TRACE_IOCTL) {
- uvc_printk(KERN_DEBUG, "uvc_v4l2_ioctl(");
- v4l_printk_ioctl(NULL, cmd);
- printk(")\n");
- }
-
- return video_usercopy(file, cmd, arg, uvc_v4l2_do_ioctl);
-}
-
-#ifdef CONFIG_COMPAT
-struct uvc_xu_control_mapping32 {
- __u32 id;
- __u8 name[32];
- __u8 entity[16];
- __u8 selector;
-
- __u8 size;
- __u8 offset;
- __u32 v4l2_type;
- __u32 data_type;
-
- compat_caddr_t menu_info;
- __u32 menu_count;
-
- __u32 reserved[4];
-};
-
-static int uvc_v4l2_get_xu_mapping(struct uvc_xu_control_mapping *kp,
- const struct uvc_xu_control_mapping32 __user *up)
-{
- struct uvc_menu_info __user *umenus;
- struct uvc_menu_info __user *kmenus;
- compat_caddr_t p;
-
- if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
- __copy_from_user(kp, up, offsetof(typeof(*up), menu_info)) ||
- __get_user(kp->menu_count, &up->menu_count))
- return -EFAULT;
-
- memset(kp->reserved, 0, sizeof(kp->reserved));
-
- if (kp->menu_count == 0) {
- kp->menu_info = NULL;
- return 0;
- }
-
- if (__get_user(p, &up->menu_info))
- return -EFAULT;
- umenus = compat_ptr(p);
- if (!access_ok(VERIFY_READ, umenus, kp->menu_count * sizeof(*umenus)))
- return -EFAULT;
-
- kmenus = compat_alloc_user_space(kp->menu_count * sizeof(*kmenus));
- if (kmenus == NULL)
- return -EFAULT;
- kp->menu_info = kmenus;
-
- if (copy_in_user(kmenus, umenus, kp->menu_count * sizeof(*umenus)))
- return -EFAULT;
-
- return 0;
-}
-
-static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp,
- struct uvc_xu_control_mapping32 __user *up)
-{
- struct uvc_menu_info __user *umenus;
- struct uvc_menu_info __user *kmenus = kp->menu_info;
- compat_caddr_t p;
-
- if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
- __copy_to_user(up, kp, offsetof(typeof(*up), menu_info)) ||
- __put_user(kp->menu_count, &up->menu_count))
- return -EFAULT;
-
- if (__clear_user(up->reserved, sizeof(up->reserved)))
- return -EFAULT;
-
- if (kp->menu_count == 0)
- return 0;
-
- if (get_user(p, &up->menu_info))
- return -EFAULT;
- umenus = compat_ptr(p);
-
- if (copy_in_user(umenus, kmenus, kp->menu_count * sizeof(*umenus)))
- return -EFAULT;
-
- return 0;
-}
-
-struct uvc_xu_control_query32 {
- __u8 unit;
- __u8 selector;
- __u8 query;
- __u16 size;
- compat_caddr_t data;
-};
-
-static int uvc_v4l2_get_xu_query(struct uvc_xu_control_query *kp,
- const struct uvc_xu_control_query32 __user *up)
-{
- u8 __user *udata;
- u8 __user *kdata;
- compat_caddr_t p;
-
- if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
- __copy_from_user(kp, up, offsetof(typeof(*up), data)))
- return -EFAULT;
-
- if (kp->size == 0) {
- kp->data = NULL;
- return 0;
- }
-
- if (__get_user(p, &up->data))
- return -EFAULT;
- udata = compat_ptr(p);
- if (!access_ok(VERIFY_READ, udata, kp->size))
- return -EFAULT;
-
- kdata = compat_alloc_user_space(kp->size);
- if (kdata == NULL)
- return -EFAULT;
- kp->data = kdata;
-
- if (copy_in_user(kdata, udata, kp->size))
- return -EFAULT;
-
- return 0;
-}
-
-static int uvc_v4l2_put_xu_query(const struct uvc_xu_control_query *kp,
- struct uvc_xu_control_query32 __user *up)
-{
- u8 __user *udata;
- u8 __user *kdata = kp->data;
- compat_caddr_t p;
-
- if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
- __copy_to_user(up, kp, offsetof(typeof(*up), data)))
- return -EFAULT;
-
- if (kp->size == 0)
- return 0;
-
- if (get_user(p, &up->data))
- return -EFAULT;
- udata = compat_ptr(p);
- if (!access_ok(VERIFY_READ, udata, kp->size))
- return -EFAULT;
-
- if (copy_in_user(udata, kdata, kp->size))
- return -EFAULT;
-
- return 0;
-}
-
-#define UVCIOC_CTRL_MAP32 _IOWR('u', 0x20, struct uvc_xu_control_mapping32)
-#define UVCIOC_CTRL_QUERY32 _IOWR('u', 0x21, struct uvc_xu_control_query32)
-
-static long uvc_v4l2_compat_ioctl32(struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- union {
- struct uvc_xu_control_mapping xmap;
- struct uvc_xu_control_query xqry;
- } karg;
- void __user *up = compat_ptr(arg);
- mm_segment_t old_fs;
- long ret;
-
- switch (cmd) {
- case UVCIOC_CTRL_MAP32:
- cmd = UVCIOC_CTRL_MAP;
- ret = uvc_v4l2_get_xu_mapping(&karg.xmap, up);
- break;
-
- case UVCIOC_CTRL_QUERY32:
- cmd = UVCIOC_CTRL_QUERY;
- ret = uvc_v4l2_get_xu_query(&karg.xqry, up);
- break;
-
- default:
- return -ENOIOCTLCMD;
- }
-
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- ret = uvc_v4l2_ioctl(file, cmd, (unsigned long)&karg);
- set_fs(old_fs);
-
- if (ret < 0)
- return ret;
-
- switch (cmd) {
- case UVCIOC_CTRL_MAP:
- ret = uvc_v4l2_put_xu_mapping(&karg.xmap, up);
- break;
-
- case UVCIOC_CTRL_QUERY:
- ret = uvc_v4l2_put_xu_query(&karg.xqry, up);
- break;
- }
-
- return ret;
-}
-#endif
-
-static ssize_t uvc_v4l2_read(struct file *file, char __user *data,
- size_t count, loff_t *ppos)
-{
- uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_read: not implemented.\n");
- return -EINVAL;
-}
-
-static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
-{
- struct uvc_fh *handle = file->private_data;
- struct uvc_streaming *stream = handle->stream;
-
- uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n");
-
- return uvc_queue_mmap(&stream->queue, vma);
-}
-
-static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait)
-{
- struct uvc_fh *handle = file->private_data;
- struct uvc_streaming *stream = handle->stream;
-
- uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n");
-
- return uvc_queue_poll(&stream->queue, file, wait);
-}
-
-#ifndef CONFIG_MMU
-static unsigned long uvc_v4l2_get_unmapped_area(struct file *file,
- unsigned long addr, unsigned long len, unsigned long pgoff,
- unsigned long flags)
-{
- struct uvc_fh *handle = file->private_data;
- struct uvc_streaming *stream = handle->stream;
-
- uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_get_unmapped_area\n");
-
- return uvc_queue_get_unmapped_area(&stream->queue, pgoff);
-}
-#endif
-
-const struct v4l2_file_operations uvc_fops = {
- .owner = THIS_MODULE,
- .open = uvc_v4l2_open,
- .release = uvc_v4l2_release,
- .unlocked_ioctl = uvc_v4l2_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl32 = uvc_v4l2_compat_ioctl32,
-#endif
- .read = uvc_v4l2_read,
- .mmap = uvc_v4l2_mmap,
- .poll = uvc_v4l2_poll,
-#ifndef CONFIG_MMU
- .get_unmapped_area = uvc_v4l2_get_unmapped_area,
-#endif
-};
-