631 lines
15 KiB
C
631 lines
15 KiB
C
/*
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* V4L2 sub-device
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*
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* Copyright (C) 2010 Nokia Corporation
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*
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* Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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* Sakari Ailus <sakari.ailus@iki.fi>
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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 version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/ioctl.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/videodev2.h>
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#include <linux/export.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-fh.h>
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#include <media/v4l2-event.h>
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static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd)
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{
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#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
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if (sd->entity.num_pads) {
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fh->pad = v4l2_subdev_alloc_pad_config(sd);
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if (fh->pad == NULL)
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return -ENOMEM;
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}
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#endif
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return 0;
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}
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static void subdev_fh_free(struct v4l2_subdev_fh *fh)
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{
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#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
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v4l2_subdev_free_pad_config(fh->pad);
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fh->pad = NULL;
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#endif
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}
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static int subdev_open(struct file *file)
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{
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struct video_device *vdev = video_devdata(file);
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struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
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struct v4l2_subdev_fh *subdev_fh;
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#if defined(CONFIG_MEDIA_CONTROLLER)
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struct media_entity *entity = NULL;
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#endif
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int ret;
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subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
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if (subdev_fh == NULL)
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return -ENOMEM;
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ret = subdev_fh_init(subdev_fh, sd);
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if (ret) {
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kfree(subdev_fh);
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return ret;
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}
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v4l2_fh_init(&subdev_fh->vfh, vdev);
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v4l2_fh_add(&subdev_fh->vfh);
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file->private_data = &subdev_fh->vfh;
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#if defined(CONFIG_MEDIA_CONTROLLER)
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if (sd->v4l2_dev->mdev) {
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entity = media_entity_get(&sd->entity);
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if (!entity) {
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ret = -EBUSY;
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goto err;
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}
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}
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#endif
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if (sd->internal_ops && sd->internal_ops->open) {
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ret = sd->internal_ops->open(sd, subdev_fh);
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if (ret < 0)
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goto err;
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}
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return 0;
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err:
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#if defined(CONFIG_MEDIA_CONTROLLER)
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media_entity_put(entity);
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#endif
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v4l2_fh_del(&subdev_fh->vfh);
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v4l2_fh_exit(&subdev_fh->vfh);
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subdev_fh_free(subdev_fh);
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kfree(subdev_fh);
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return ret;
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}
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static int subdev_close(struct file *file)
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{
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struct video_device *vdev = video_devdata(file);
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struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
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struct v4l2_fh *vfh = file->private_data;
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struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
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if (sd->internal_ops && sd->internal_ops->close)
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sd->internal_ops->close(sd, subdev_fh);
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#if defined(CONFIG_MEDIA_CONTROLLER)
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if (sd->v4l2_dev->mdev)
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media_entity_put(&sd->entity);
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#endif
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v4l2_fh_del(vfh);
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v4l2_fh_exit(vfh);
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subdev_fh_free(subdev_fh);
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kfree(subdev_fh);
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file->private_data = NULL;
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return 0;
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}
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#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
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static int check_format(struct v4l2_subdev *sd,
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struct v4l2_subdev_format *format)
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{
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if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
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format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (format->pad >= sd->entity.num_pads)
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return -EINVAL;
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return 0;
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}
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static int check_crop(struct v4l2_subdev *sd, struct v4l2_subdev_crop *crop)
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{
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if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
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crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (crop->pad >= sd->entity.num_pads)
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return -EINVAL;
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return 0;
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}
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static int check_selection(struct v4l2_subdev *sd,
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struct v4l2_subdev_selection *sel)
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{
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if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
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sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (sel->pad >= sd->entity.num_pads)
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return -EINVAL;
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return 0;
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}
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static int check_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
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{
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if (edid->pad >= sd->entity.num_pads)
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return -EINVAL;
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if (edid->blocks && edid->edid == NULL)
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return -EINVAL;
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return 0;
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}
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#endif
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static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
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{
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struct video_device *vdev = video_devdata(file);
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struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
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struct v4l2_fh *vfh = file->private_data;
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#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
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struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
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int rval;
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#endif
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switch (cmd) {
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case VIDIOC_QUERYCTRL:
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return v4l2_queryctrl(vfh->ctrl_handler, arg);
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case VIDIOC_QUERY_EXT_CTRL:
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return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg);
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case VIDIOC_QUERYMENU:
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return v4l2_querymenu(vfh->ctrl_handler, arg);
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case VIDIOC_G_CTRL:
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return v4l2_g_ctrl(vfh->ctrl_handler, arg);
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case VIDIOC_S_CTRL:
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return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
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case VIDIOC_G_EXT_CTRLS:
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return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);
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case VIDIOC_S_EXT_CTRLS:
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return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);
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case VIDIOC_TRY_EXT_CTRLS:
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return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);
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case VIDIOC_DQEVENT:
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if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
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return -ENOIOCTLCMD;
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return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);
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case VIDIOC_SUBSCRIBE_EVENT:
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return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);
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case VIDIOC_UNSUBSCRIBE_EVENT:
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return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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case VIDIOC_DBG_G_REGISTER:
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{
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struct v4l2_dbg_register *p = arg;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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return v4l2_subdev_call(sd, core, g_register, p);
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}
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case VIDIOC_DBG_S_REGISTER:
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{
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struct v4l2_dbg_register *p = arg;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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return v4l2_subdev_call(sd, core, s_register, p);
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}
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#endif
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case VIDIOC_LOG_STATUS: {
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int ret;
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pr_info("%s: ================= START STATUS =================\n",
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sd->name);
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ret = v4l2_subdev_call(sd, core, log_status);
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pr_info("%s: ================== END STATUS ==================\n",
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sd->name);
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return ret;
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}
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#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
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case VIDIOC_SUBDEV_G_FMT: {
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struct v4l2_subdev_format *format = arg;
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rval = check_format(sd, format);
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if (rval)
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return rval;
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return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh->pad, format);
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}
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case VIDIOC_SUBDEV_S_FMT: {
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struct v4l2_subdev_format *format = arg;
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rval = check_format(sd, format);
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if (rval)
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return rval;
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return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh->pad, format);
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}
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case VIDIOC_SUBDEV_G_CROP: {
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struct v4l2_subdev_crop *crop = arg;
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struct v4l2_subdev_selection sel;
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rval = check_crop(sd, crop);
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if (rval)
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return rval;
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memset(&sel, 0, sizeof(sel));
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sel.which = crop->which;
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sel.pad = crop->pad;
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sel.target = V4L2_SEL_TGT_CROP;
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rval = v4l2_subdev_call(
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sd, pad, get_selection, subdev_fh->pad, &sel);
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crop->rect = sel.r;
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return rval;
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}
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case VIDIOC_SUBDEV_S_CROP: {
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struct v4l2_subdev_crop *crop = arg;
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struct v4l2_subdev_selection sel;
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rval = check_crop(sd, crop);
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if (rval)
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return rval;
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memset(&sel, 0, sizeof(sel));
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sel.which = crop->which;
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sel.pad = crop->pad;
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sel.target = V4L2_SEL_TGT_CROP;
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sel.r = crop->rect;
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rval = v4l2_subdev_call(
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sd, pad, set_selection, subdev_fh->pad, &sel);
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crop->rect = sel.r;
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return rval;
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}
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case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
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struct v4l2_subdev_mbus_code_enum *code = arg;
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if (code->which != V4L2_SUBDEV_FORMAT_TRY &&
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code->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (code->pad >= sd->entity.num_pads)
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return -EINVAL;
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return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh->pad,
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code);
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}
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case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
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struct v4l2_subdev_frame_size_enum *fse = arg;
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if (fse->which != V4L2_SUBDEV_FORMAT_TRY &&
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fse->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (fse->pad >= sd->entity.num_pads)
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return -EINVAL;
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return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh->pad,
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fse);
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}
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case VIDIOC_SUBDEV_G_FRAME_INTERVAL: {
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struct v4l2_subdev_frame_interval *fi = arg;
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if (fi->pad >= sd->entity.num_pads)
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return -EINVAL;
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return v4l2_subdev_call(sd, video, g_frame_interval, arg);
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}
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case VIDIOC_SUBDEV_S_FRAME_INTERVAL: {
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struct v4l2_subdev_frame_interval *fi = arg;
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if (fi->pad >= sd->entity.num_pads)
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return -EINVAL;
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return v4l2_subdev_call(sd, video, s_frame_interval, arg);
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}
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case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
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struct v4l2_subdev_frame_interval_enum *fie = arg;
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if (fie->which != V4L2_SUBDEV_FORMAT_TRY &&
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fie->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (fie->pad >= sd->entity.num_pads)
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return -EINVAL;
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return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh->pad,
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fie);
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}
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case VIDIOC_SUBDEV_G_SELECTION: {
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struct v4l2_subdev_selection *sel = arg;
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rval = check_selection(sd, sel);
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if (rval)
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return rval;
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return v4l2_subdev_call(
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sd, pad, get_selection, subdev_fh->pad, sel);
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}
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case VIDIOC_SUBDEV_S_SELECTION: {
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struct v4l2_subdev_selection *sel = arg;
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rval = check_selection(sd, sel);
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if (rval)
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return rval;
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return v4l2_subdev_call(
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sd, pad, set_selection, subdev_fh->pad, sel);
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}
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case VIDIOC_G_EDID: {
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struct v4l2_subdev_edid *edid = arg;
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rval = check_edid(sd, edid);
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if (rval)
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return rval;
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return v4l2_subdev_call(sd, pad, get_edid, edid);
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}
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case VIDIOC_S_EDID: {
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struct v4l2_subdev_edid *edid = arg;
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rval = check_edid(sd, edid);
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if (rval)
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return rval;
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return v4l2_subdev_call(sd, pad, set_edid, edid);
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}
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case VIDIOC_SUBDEV_DV_TIMINGS_CAP: {
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struct v4l2_dv_timings_cap *cap = arg;
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if (cap->pad >= sd->entity.num_pads)
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return -EINVAL;
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return v4l2_subdev_call(sd, pad, dv_timings_cap, cap);
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}
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case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: {
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struct v4l2_enum_dv_timings *dvt = arg;
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if (dvt->pad >= sd->entity.num_pads)
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return -EINVAL;
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return v4l2_subdev_call(sd, pad, enum_dv_timings, dvt);
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}
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case VIDIOC_SUBDEV_QUERY_DV_TIMINGS:
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return v4l2_subdev_call(sd, video, query_dv_timings, arg);
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case VIDIOC_SUBDEV_G_DV_TIMINGS:
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return v4l2_subdev_call(sd, video, g_dv_timings, arg);
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case VIDIOC_SUBDEV_S_DV_TIMINGS:
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return v4l2_subdev_call(sd, video, s_dv_timings, arg);
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#endif
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default:
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return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
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}
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return 0;
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}
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static long subdev_ioctl(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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return video_usercopy(file, cmd, arg, subdev_do_ioctl);
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}
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#ifdef CONFIG_COMPAT
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static long subdev_compat_ioctl32(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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struct video_device *vdev = video_devdata(file);
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struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
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return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg);
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}
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#endif
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static unsigned int subdev_poll(struct file *file, poll_table *wait)
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{
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struct video_device *vdev = video_devdata(file);
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struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
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struct v4l2_fh *fh = file->private_data;
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if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
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return POLLERR;
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poll_wait(file, &fh->wait, wait);
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if (v4l2_event_pending(fh))
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return POLLPRI;
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return 0;
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}
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|
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const struct v4l2_file_operations v4l2_subdev_fops = {
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.owner = THIS_MODULE,
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.open = subdev_open,
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.unlocked_ioctl = subdev_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl32 = subdev_compat_ioctl32,
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#endif
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.release = subdev_close,
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.poll = subdev_poll,
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};
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|
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#ifdef CONFIG_MEDIA_CONTROLLER
|
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int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
|
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struct media_link *link,
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struct v4l2_subdev_format *source_fmt,
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struct v4l2_subdev_format *sink_fmt)
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{
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/* The width, height and code must match. */
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if (source_fmt->format.width != sink_fmt->format.width
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|| source_fmt->format.height != sink_fmt->format.height
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|| source_fmt->format.code != sink_fmt->format.code)
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return -EPIPE;
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/* The field order must match, or the sink field order must be NONE
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* to support interlaced hardware connected to bridges that support
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* progressive formats only.
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*/
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if (source_fmt->format.field != sink_fmt->format.field &&
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sink_fmt->format.field != V4L2_FIELD_NONE)
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return -EPIPE;
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return 0;
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}
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EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default);
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static int
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v4l2_subdev_link_validate_get_format(struct media_pad *pad,
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struct v4l2_subdev_format *fmt)
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{
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if (is_media_entity_v4l2_subdev(pad->entity)) {
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struct v4l2_subdev *sd =
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media_entity_to_v4l2_subdev(pad->entity);
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fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
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fmt->pad = pad->index;
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return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
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}
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WARN(pad->entity->function != MEDIA_ENT_F_IO_V4L,
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"Driver bug! Wrong media entity type 0x%08x, entity %s\n",
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pad->entity->function, pad->entity->name);
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return -EINVAL;
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}
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int v4l2_subdev_link_validate(struct media_link *link)
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{
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struct v4l2_subdev *sink;
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struct v4l2_subdev_format sink_fmt, source_fmt;
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int rval;
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rval = v4l2_subdev_link_validate_get_format(
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link->source, &source_fmt);
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if (rval < 0)
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return 0;
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rval = v4l2_subdev_link_validate_get_format(
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link->sink, &sink_fmt);
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if (rval < 0)
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return 0;
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sink = media_entity_to_v4l2_subdev(link->sink->entity);
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rval = v4l2_subdev_call(sink, pad, link_validate, link,
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&source_fmt, &sink_fmt);
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if (rval != -ENOIOCTLCMD)
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return rval;
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return v4l2_subdev_link_validate_default(
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sink, link, &source_fmt, &sink_fmt);
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}
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EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);
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struct v4l2_subdev_pad_config *
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v4l2_subdev_alloc_pad_config(struct v4l2_subdev *sd)
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{
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struct v4l2_subdev_pad_config *cfg;
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int ret;
|
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if (!sd->entity.num_pads)
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return NULL;
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cfg = kcalloc(sd->entity.num_pads, sizeof(*cfg), GFP_KERNEL);
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if (!cfg)
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return NULL;
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ret = v4l2_subdev_call(sd, pad, init_cfg, cfg);
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if (ret < 0 && ret != -ENOIOCTLCMD) {
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kfree(cfg);
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return NULL;
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}
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|
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return cfg;
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}
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EXPORT_SYMBOL_GPL(v4l2_subdev_alloc_pad_config);
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void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config *cfg)
|
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{
|
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kfree(cfg);
|
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}
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EXPORT_SYMBOL_GPL(v4l2_subdev_free_pad_config);
|
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#endif /* CONFIG_MEDIA_CONTROLLER */
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|
|
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void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops)
|
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{
|
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INIT_LIST_HEAD(&sd->list);
|
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BUG_ON(!ops);
|
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sd->ops = ops;
|
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sd->v4l2_dev = NULL;
|
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sd->flags = 0;
|
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sd->name[0] = '\0';
|
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sd->grp_id = 0;
|
|
sd->dev_priv = NULL;
|
|
sd->host_priv = NULL;
|
|
#if defined(CONFIG_MEDIA_CONTROLLER)
|
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sd->entity.name = sd->name;
|
|
sd->entity.obj_type = MEDIA_ENTITY_TYPE_V4L2_SUBDEV;
|
|
sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
|
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#endif
|
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}
|
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EXPORT_SYMBOL(v4l2_subdev_init);
|
|
|
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void v4l2_subdev_notify_event(struct v4l2_subdev *sd,
|
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const struct v4l2_event *ev)
|
|
{
|
|
v4l2_event_queue(sd->devnode, ev);
|
|
v4l2_subdev_notify(sd, V4L2_DEVICE_NOTIFY_EVENT, (void *)ev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(v4l2_subdev_notify_event);
|