[deliverable/linux.git] / drivers / media / v4l2-core / v4l2-subdev.c

/*
 * V4L2 sub-device
 *
 * Copyright (C) 2010 Nokia Corporation
 *
 * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 *	    Sakari Ailus <sakari.ailus@iki.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/ioctl.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/videodev2.h>
#include <linux/export.h>

#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>

static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd)
{
#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	fh->pad = kzalloc(sizeof(*fh->pad) * sd->entity.num_pads, GFP_KERNEL);
	if (fh->pad == NULL)
		return -ENOMEM;
#endif
	return 0;
}

static void subdev_fh_free(struct v4l2_subdev_fh *fh)
{
#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	kfree(fh->pad);
	fh->pad = NULL;
#endif
}

static int subdev_open(struct file *file)
{
	struct video_device *vdev = video_devdata(file);
	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	struct v4l2_subdev_fh *subdev_fh;
#if defined(CONFIG_MEDIA_CONTROLLER)
	struct media_entity *entity = NULL;
#endif
	int ret;

	subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
	if (subdev_fh == NULL)
		return -ENOMEM;

	ret = subdev_fh_init(subdev_fh, sd);
	if (ret) {
		kfree(subdev_fh);
		return ret;
	}

	v4l2_fh_init(&subdev_fh->vfh, vdev);
	v4l2_fh_add(&subdev_fh->vfh);
	file->private_data = &subdev_fh->vfh;
#if defined(CONFIG_MEDIA_CONTROLLER)
	if (sd->v4l2_dev->mdev) {
		entity = media_entity_get(&sd->entity);
		if (!entity) {
			ret = -EBUSY;
			goto err;
		}
	}
#endif

	if (sd->internal_ops && sd->internal_ops->open) {
		ret = sd->internal_ops->open(sd, subdev_fh);
		if (ret < 0)
			goto err;
	}

	return 0;

err:
#if defined(CONFIG_MEDIA_CONTROLLER)
	if (entity)
		media_entity_put(entity);
#endif
	v4l2_fh_del(&subdev_fh->vfh);
	v4l2_fh_exit(&subdev_fh->vfh);
	subdev_fh_free(subdev_fh);
	kfree(subdev_fh);

	return ret;
}

static int subdev_close(struct file *file)
{
	struct video_device *vdev = video_devdata(file);
	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	struct v4l2_fh *vfh = file->private_data;
	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);

	if (sd->internal_ops && sd->internal_ops->close)
		sd->internal_ops->close(sd, subdev_fh);
#if defined(CONFIG_MEDIA_CONTROLLER)
	if (sd->v4l2_dev->mdev)
		media_entity_put(&sd->entity);
#endif
	v4l2_fh_del(vfh);
	v4l2_fh_exit(vfh);
	subdev_fh_free(subdev_fh);
	kfree(subdev_fh);
	file->private_data = NULL;

	return 0;
}

#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
static int check_format(struct v4l2_subdev *sd,
			struct v4l2_subdev_format *format)
{
	if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
	    format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
		return -EINVAL;

	if (format->pad >= sd->entity.num_pads)
		return -EINVAL;

	return 0;
}

static int check_crop(struct v4l2_subdev *sd, struct v4l2_subdev_crop *crop)
{
	if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
	    crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
		return -EINVAL;

	if (crop->pad >= sd->entity.num_pads)
		return -EINVAL;

	return 0;
}

static int check_selection(struct v4l2_subdev *sd,
			   struct v4l2_subdev_selection *sel)
{
	if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
	    sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
		return -EINVAL;

	if (sel->pad >= sd->entity.num_pads)
		return -EINVAL;

	return 0;
}

static int check_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
{
	if (edid->pad >= sd->entity.num_pads)
		return -EINVAL;

	if (edid->blocks && edid->edid == NULL)
		return -EINVAL;

	return 0;
}
#endif

static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
{
	struct video_device *vdev = video_devdata(file);
	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	struct v4l2_fh *vfh = file->private_data;
#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
	int rval;
#endif

	switch (cmd) {
	case VIDIOC_QUERYCTRL:
		return v4l2_queryctrl(vfh->ctrl_handler, arg);

	case VIDIOC_QUERY_EXT_CTRL:
		return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg);

	case VIDIOC_QUERYMENU:
		return v4l2_querymenu(vfh->ctrl_handler, arg);

	case VIDIOC_G_CTRL:
		return v4l2_g_ctrl(vfh->ctrl_handler, arg);

	case VIDIOC_S_CTRL:
		return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);

	case VIDIOC_G_EXT_CTRLS:
		return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);

	case VIDIOC_S_EXT_CTRLS:
		return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);

	case VIDIOC_TRY_EXT_CTRLS:
		return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);

	case VIDIOC_DQEVENT:
		if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
			return -ENOIOCTLCMD;

		return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);

	case VIDIOC_SUBSCRIBE_EVENT:
		return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);

	case VIDIOC_UNSUBSCRIBE_EVENT:
		return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);

#ifdef CONFIG_VIDEO_ADV_DEBUG
	case VIDIOC_DBG_G_REGISTER:
	{
		struct v4l2_dbg_register *p = arg;

		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;
		return v4l2_subdev_call(sd, core, g_register, p);
	}
	case VIDIOC_DBG_S_REGISTER:
	{
		struct v4l2_dbg_register *p = arg;

		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;
		return v4l2_subdev_call(sd, core, s_register, p);
	}
#endif

	case VIDIOC_LOG_STATUS: {
		int ret;

		pr_info("%s: =================  START STATUS  =================\n",
			sd->name);
		ret = v4l2_subdev_call(sd, core, log_status);
		pr_info("%s: ==================  END STATUS  ==================\n",
			sd->name);
		return ret;
	}

#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	case VIDIOC_SUBDEV_G_FMT: {
		struct v4l2_subdev_format *format = arg;

		rval = check_format(sd, format);
		if (rval)
			return rval;

		return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh, format);
	}

	case VIDIOC_SUBDEV_S_FMT: {
		struct v4l2_subdev_format *format = arg;

		rval = check_format(sd, format);
		if (rval)
			return rval;

		return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh, format);
	}

	case VIDIOC_SUBDEV_G_CROP: {
		struct v4l2_subdev_crop *crop = arg;
		struct v4l2_subdev_selection sel;

		rval = check_crop(sd, crop);
		if (rval)
			return rval;

		memset(&sel, 0, sizeof(sel));
		sel.which = crop->which;
		sel.pad = crop->pad;
		sel.target = V4L2_SEL_TGT_CROP;

		rval = v4l2_subdev_call(
			sd, pad, get_selection, subdev_fh, &sel);

		crop->rect = sel.r;

		return rval;
	}

	case VIDIOC_SUBDEV_S_CROP: {
		struct v4l2_subdev_crop *crop = arg;
		struct v4l2_subdev_selection sel;

		rval = check_crop(sd, crop);
		if (rval)
			return rval;

		memset(&sel, 0, sizeof(sel));
		sel.which = crop->which;
		sel.pad = crop->pad;
		sel.target = V4L2_SEL_TGT_CROP;
		sel.r = crop->rect;

		rval = v4l2_subdev_call(
			sd, pad, set_selection, subdev_fh, &sel);

		crop->rect = sel.r;

		return rval;
	}

	case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
		struct v4l2_subdev_mbus_code_enum *code = arg;

		if (code->pad >= sd->entity.num_pads)
			return -EINVAL;

		return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh,
					code);
	}

	case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
		struct v4l2_subdev_frame_size_enum *fse = arg;

		if (fse->pad >= sd->entity.num_pads)
			return -EINVAL;

		return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh,
					fse);
	}

	case VIDIOC_SUBDEV_G_FRAME_INTERVAL: {
		struct v4l2_subdev_frame_interval *fi = arg;

		if (fi->pad >= sd->entity.num_pads)
			return -EINVAL;

		return v4l2_subdev_call(sd, video, g_frame_interval, arg);
	}

	case VIDIOC_SUBDEV_S_FRAME_INTERVAL: {
		struct v4l2_subdev_frame_interval *fi = arg;

		if (fi->pad >= sd->entity.num_pads)
			return -EINVAL;

		return v4l2_subdev_call(sd, video, s_frame_interval, arg);
	}

	case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
		struct v4l2_subdev_frame_interval_enum *fie = arg;

		if (fie->pad >= sd->entity.num_pads)
			return -EINVAL;

		return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh,
					fie);
	}

	case VIDIOC_SUBDEV_G_SELECTION: {
		struct v4l2_subdev_selection *sel = arg;

		rval = check_selection(sd, sel);
		if (rval)
			return rval;

		return v4l2_subdev_call(
			sd, pad, get_selection, subdev_fh, sel);
	}

	case VIDIOC_SUBDEV_S_SELECTION: {
		struct v4l2_subdev_selection *sel = arg;

		rval = check_selection(sd, sel);
		if (rval)
			return rval;

		return v4l2_subdev_call(
			sd, pad, set_selection, subdev_fh, sel);
	}

	case VIDIOC_G_EDID: {
		struct v4l2_subdev_edid *edid = arg;

		rval = check_edid(sd, edid);
		if (rval)
			return rval;

		return v4l2_subdev_call(sd, pad, get_edid, edid);
	}

	case VIDIOC_S_EDID: {
		struct v4l2_subdev_edid *edid = arg;

		rval = check_edid(sd, edid);
		if (rval)
			return rval;

		return v4l2_subdev_call(sd, pad, set_edid, edid);
	}

	case VIDIOC_SUBDEV_DV_TIMINGS_CAP: {
		struct v4l2_dv_timings_cap *cap = arg;

		if (cap->pad >= sd->entity.num_pads)
			return -EINVAL;

		return v4l2_subdev_call(sd, pad, dv_timings_cap, cap);
	}

	case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: {
		struct v4l2_enum_dv_timings *dvt = arg;

		if (dvt->pad >= sd->entity.num_pads)
			return -EINVAL;

		return v4l2_subdev_call(sd, pad, enum_dv_timings, dvt);
	}

	case VIDIOC_SUBDEV_QUERY_DV_TIMINGS:
		return v4l2_subdev_call(sd, video, query_dv_timings, arg);

	case VIDIOC_SUBDEV_G_DV_TIMINGS:
		return v4l2_subdev_call(sd, video, g_dv_timings, arg);

	case VIDIOC_SUBDEV_S_DV_TIMINGS:
		return v4l2_subdev_call(sd, video, s_dv_timings, arg);
#endif
	default:
		return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
	}

	return 0;
}

static long subdev_ioctl(struct file *file, unsigned int cmd,
	unsigned long arg)
{
	return video_usercopy(file, cmd, arg, subdev_do_ioctl);
}

#ifdef CONFIG_COMPAT
static long subdev_compat_ioctl32(struct file *file, unsigned int cmd,
	unsigned long arg)
{
	struct video_device *vdev = video_devdata(file);
	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);

	return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg);
}
#endif

static unsigned int subdev_poll(struct file *file, poll_table *wait)
{
	struct video_device *vdev = video_devdata(file);
	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	struct v4l2_fh *fh = file->private_data;

	if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
		return POLLERR;

	poll_wait(file, &fh->wait, wait);

	if (v4l2_event_pending(fh))
		return POLLPRI;

	return 0;
}

const struct v4l2_file_operations v4l2_subdev_fops = {
	.owner = THIS_MODULE,
	.open = subdev_open,
	.unlocked_ioctl = subdev_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl32 = subdev_compat_ioctl32,
#endif
	.release = subdev_close,
	.poll = subdev_poll,
};

#ifdef CONFIG_MEDIA_CONTROLLER
int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
				      struct media_link *link,
				      struct v4l2_subdev_format *source_fmt,
				      struct v4l2_subdev_format *sink_fmt)
{
	/* The width, height and code must match. */
	if (source_fmt->format.width != sink_fmt->format.width
	    || source_fmt->format.height != sink_fmt->format.height
	    || source_fmt->format.code != sink_fmt->format.code)
		return -EINVAL;

	/* The field order must match, or the sink field order must be NONE
	 * to support interlaced hardware connected to bridges that support
	 * progressive formats only.
	 */
	if (source_fmt->format.field != sink_fmt->format.field &&
	    sink_fmt->format.field != V4L2_FIELD_NONE)
		return -EINVAL;

	return 0;
}
EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default);

static int
v4l2_subdev_link_validate_get_format(struct media_pad *pad,
				     struct v4l2_subdev_format *fmt)
{
	if (media_entity_type(pad->entity) == MEDIA_ENT_T_V4L2_SUBDEV) {
		struct v4l2_subdev *sd =
			media_entity_to_v4l2_subdev(pad->entity);

		fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
		fmt->pad = pad->index;
		return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
	}

	WARN(pad->entity->type != MEDIA_ENT_T_DEVNODE_V4L,
	     "Driver bug! Wrong media entity type 0x%08x, entity %s\n",
	     pad->entity->type, pad->entity->name);

	return -EINVAL;
}

int v4l2_subdev_link_validate(struct media_link *link)
{
	struct v4l2_subdev *sink;
	struct v4l2_subdev_format sink_fmt, source_fmt;
	int rval;

	rval = v4l2_subdev_link_validate_get_format(
		link->source, &source_fmt);
	if (rval < 0)
		return 0;

	rval = v4l2_subdev_link_validate_get_format(
		link->sink, &sink_fmt);
	if (rval < 0)
		return 0;

	sink = media_entity_to_v4l2_subdev(link->sink->entity);

	rval = v4l2_subdev_call(sink, pad, link_validate, link,
				&source_fmt, &sink_fmt);
	if (rval != -ENOIOCTLCMD)
		return rval;

	return v4l2_subdev_link_validate_default(
		sink, link, &source_fmt, &sink_fmt);
}
EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);
#endif /* CONFIG_MEDIA_CONTROLLER */

void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops)
{
	INIT_LIST_HEAD(&sd->list);
	BUG_ON(!ops);
	sd->ops = ops;
	sd->v4l2_dev = NULL;
	sd->flags = 0;
	sd->name[0] = '\0';
	sd->grp_id = 0;
	sd->dev_priv = NULL;
	sd->host_priv = NULL;
#if defined(CONFIG_MEDIA_CONTROLLER)
	sd->entity.name = sd->name;
	sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV;
#endif
}
EXPORT_SYMBOL(v4l2_subdev_init);
Commit	Line	Data
2096a5dc	1	/*
3dd5ee08	2	* V4L2 sub-device
2096a5dc	3	*
3dd5ee08	4	* Copyright (C) 2010 Nokia Corporation
2096a5dc	5	*
3dd5ee08 LP	6	* Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
3dd5ee08 LP	7	* Sakari Ailus <sakari.ailus@iki.fi>
2096a5dc	8	*
3dd5ee08 LP	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
2096a5dc	12	*
3dd5ee08 LP	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
2096a5dc	17	*
3dd5ee08 LP	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
2096a5dc LP	21	*/
2096a5dc LP	22
2096a5dc	23	#include <linux/ioctl.h>
02adb1cc SA	24	#include <linux/slab.h>
02adb1cc SA	25	#include <linux/types.h>
2096a5dc	26	#include <linux/videodev2.h>
35a24636	27	#include <linux/export.h>
2096a5dc	28
ea8aa434	29	#include <media/v4l2-ctrls.h>
2096a5dc LP	30	#include <media/v4l2-device.h>
2096a5dc LP	31	#include <media/v4l2-ioctl.h>
02adb1cc SA	32	#include <media/v4l2-fh.h>
02adb1cc SA	33	#include <media/v4l2-event.h>
2096a5dc	34
7cd5a16b SV	35	static int subdev_fh_init(struct v4l2_subdev_fh fh, struct v4l2_subdev sd)
	36	{
	37	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
ae184cda SA	38	fh->pad = kzalloc(sizeof(fh->pad) sd->entity.num_pads, GFP_KERNEL);
ae184cda SA	39	if (fh->pad == NULL)
7cd5a16b	40	return -ENOMEM;
7cd5a16b SV	41	#endif
	42	return 0;
	43	}
	44
	45	static void subdev_fh_free(struct v4l2_subdev_fh *fh)
	46	{
	47	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
ae184cda SA	48	kfree(fh->pad);
ae184cda SA	49	fh->pad = NULL;
7cd5a16b SV	50	#endif
	51	}
	52
2096a5dc LP	53	static int subdev_open(struct file *file)
2096a5dc LP	54	{
02adb1cc SA	55	struct video_device *vdev = video_devdata(file);
02adb1cc SA	56	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
7cd5a16b	57	struct v4l2_subdev_fh *subdev_fh;
61f5db54	58	#if defined(CONFIG_MEDIA_CONTROLLER)
f0beea8f	59	struct media_entity *entity = NULL;
61f5db54	60	#endif
02adb1cc SA	61	int ret;
02adb1cc SA	62
7cd5a16b SV	63	subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
	64	if (subdev_fh == NULL)
	65	return -ENOMEM;
02adb1cc	66
7cd5a16b SV	67	ret = subdev_fh_init(subdev_fh, sd);
	68	if (ret) {
	69	kfree(subdev_fh);
	70	return ret;
	71	}
	72
523f46d6	73	v4l2_fh_init(&subdev_fh->vfh, vdev);
7cd5a16b SV	74	v4l2_fh_add(&subdev_fh->vfh);
7cd5a16b SV	75	file->private_data = &subdev_fh->vfh;
61f5db54 LP	76	#if defined(CONFIG_MEDIA_CONTROLLER)
	77	if (sd->v4l2_dev->mdev) {
	78	entity = media_entity_get(&sd->entity);
	79	if (!entity) {
	80	ret = -EBUSY;
	81	goto err;
	82	}
	83	}
	84	#endif
7cd5a16b	85
f0beea8f LP	86	if (sd->internal_ops && sd->internal_ops->open) {
	87	ret = sd->internal_ops->open(sd, subdev_fh);
	88	if (ret < 0)
	89	goto err;
	90	}
	91
2096a5dc	92	return 0;
02adb1cc SA	93
02adb1cc SA	94	err:
f0beea8f LP	95	#if defined(CONFIG_MEDIA_CONTROLLER)
	96	if (entity)
	97	media_entity_put(entity);
	98	#endif
7cd5a16b SV	99	v4l2_fh_del(&subdev_fh->vfh);
	100	v4l2_fh_exit(&subdev_fh->vfh);
	101	subdev_fh_free(subdev_fh);
	102	kfree(subdev_fh);
02adb1cc SA	103
02adb1cc SA	104	return ret;
2096a5dc LP	105	}
	106
	107	static int subdev_close(struct file *file)
	108	{
61f5db54 LP	109	struct video_device *vdev = video_devdata(file);
61f5db54 LP	110	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
02adb1cc	111	struct v4l2_fh *vfh = file->private_data;
7cd5a16b	112	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
02adb1cc	113
f0beea8f LP	114	if (sd->internal_ops && sd->internal_ops->close)
f0beea8f LP	115	sd->internal_ops->close(sd, subdev_fh);
61f5db54 LP	116	#if defined(CONFIG_MEDIA_CONTROLLER)
	117	if (sd->v4l2_dev->mdev)
	118	media_entity_put(&sd->entity);
	119	#endif
7cd5a16b SV	120	v4l2_fh_del(vfh);
	121	v4l2_fh_exit(vfh);
	122	subdev_fh_free(subdev_fh);
	123	kfree(subdev_fh);
	124	file->private_data = NULL;
02adb1cc	125
2096a5dc LP	126	return 0;
	127	}
	128
d352bcc9	129	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
b225e398 SA	130	static int check_format(struct v4l2_subdev *sd,
	131	struct v4l2_subdev_format *format)
	132	{
	133	if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
	134	format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	135	return -EINVAL;
	136
	137	if (format->pad >= sd->entity.num_pads)
	138	return -EINVAL;
	139
	140	return 0;
	141	}
	142
	143	static int check_crop(struct v4l2_subdev sd, struct v4l2_subdev_crop crop)
	144	{
	145	if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
	146	crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	147	return -EINVAL;
	148
	149	if (crop->pad >= sd->entity.num_pads)
	150	return -EINVAL;
	151
	152	return 0;
	153	}
	154
	155	static int check_selection(struct v4l2_subdev *sd,
	156	struct v4l2_subdev_selection *sel)
	157	{
	158	if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
	159	sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	160	return -EINVAL;
	161
	162	if (sel->pad >= sd->entity.num_pads)
	163	return -EINVAL;
	164
	165	return 0;
	166	}
	167
	168	static int check_edid(struct v4l2_subdev sd, struct v4l2_subdev_edid edid)
	169	{
	170	if (edid->pad >= sd->entity.num_pads)
	171	return -EINVAL;
	172
	173	if (edid->blocks && edid->edid == NULL)
	174	return -EINVAL;
	175
	176	return 0;
	177	}
d352bcc9	178	#endif
b225e398	179
2096a5dc LP	180	static long subdev_do_ioctl(struct file file, unsigned int cmd, void arg)
2096a5dc LP	181	{
ea8aa434 LP	182	struct video_device *vdev = video_devdata(file);
ea8aa434 LP	183	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
7cd5a16b	184	struct v4l2_fh *vfh = file->private_data;
333c8b97 LP	185	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
333c8b97 LP	186	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
b225e398	187	int rval;
d352bcc9	188	#endif
ea8aa434	189
2096a5dc	190	switch (cmd) {
ea8aa434	191	case VIDIOC_QUERYCTRL:
18d171ba	192	return v4l2_queryctrl(vfh->ctrl_handler, arg);
ea8aa434	193
e6bee368 HV	194	case VIDIOC_QUERY_EXT_CTRL:
	195	return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg);
	196
ea8aa434	197	case VIDIOC_QUERYMENU:
18d171ba	198	return v4l2_querymenu(vfh->ctrl_handler, arg);
ea8aa434 LP	199
ea8aa434 LP	200	case VIDIOC_G_CTRL:
18d171ba	201	return v4l2_g_ctrl(vfh->ctrl_handler, arg);
ea8aa434 LP	202
ea8aa434 LP	203	case VIDIOC_S_CTRL:
ab892bac	204	return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
ea8aa434 LP	205
ea8aa434 LP	206	case VIDIOC_G_EXT_CTRLS:
18d171ba	207	return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);
ea8aa434 LP	208
ea8aa434 LP	209	case VIDIOC_S_EXT_CTRLS:
ab892bac	210	return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);
ea8aa434 LP	211
ea8aa434 LP	212	case VIDIOC_TRY_EXT_CTRLS:
18d171ba	213	return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);
ea8aa434	214
02adb1cc SA	215	case VIDIOC_DQEVENT:
	216	if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
	217	return -ENOIOCTLCMD;
	218
7cd5a16b	219	return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);
02adb1cc SA	220
02adb1cc SA	221	case VIDIOC_SUBSCRIBE_EVENT:
7cd5a16b	222	return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);
02adb1cc SA	223
02adb1cc SA	224	case VIDIOC_UNSUBSCRIBE_EVENT:
7cd5a16b	225	return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);
69967a71 MH	226
	227	#ifdef CONFIG_VIDEO_ADV_DEBUG
	228	case VIDIOC_DBG_G_REGISTER:
	229	{
	230	struct v4l2_dbg_register *p = arg;
	231
	232	if (!capable(CAP_SYS_ADMIN))
	233	return -EPERM;
	234	return v4l2_subdev_call(sd, core, g_register, p);
	235	}
	236	case VIDIOC_DBG_S_REGISTER:
	237	{
	238	struct v4l2_dbg_register *p = arg;
	239
	240	if (!capable(CAP_SYS_ADMIN))
	241	return -EPERM;
	242	return v4l2_subdev_call(sd, core, s_register, p);
	243	}
	244	#endif
bcd158de	245
42194e72 HV	246	case VIDIOC_LOG_STATUS: {
	247	int ret;
	248
	249	pr_info("%s: ================= START STATUS =================\n",
	250	sd->name);
	251	ret = v4l2_subdev_call(sd, core, log_status);
	252	pr_info("%s: ================== END STATUS ==================\n",
	253	sd->name);
	254	return ret;
	255	}
bcd158de	256
333c8b97 LP	257	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	258	case VIDIOC_SUBDEV_G_FMT: {
	259	struct v4l2_subdev_format *format = arg;
	260
b225e398 SA	261	rval = check_format(sd, format);
	262	if (rval)
	263	return rval;
333c8b97 LP	264
	265	return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh, format);
	266	}
	267
	268	case VIDIOC_SUBDEV_S_FMT: {
	269	struct v4l2_subdev_format *format = arg;
	270
b225e398 SA	271	rval = check_format(sd, format);
	272	if (rval)
	273	return rval;
02adb1cc	274
333c8b97 LP	275	return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh, format);
	276	}
	277
f6a5cb1b AK	278	case VIDIOC_SUBDEV_G_CROP: {
f6a5cb1b AK	279	struct v4l2_subdev_crop *crop = arg;
5b9d770f	280	struct v4l2_subdev_selection sel;
f6a5cb1b	281
b225e398 SA	282	rval = check_crop(sd, crop);
	283	if (rval)
	284	return rval;
f6a5cb1b	285
5b9d770f SA	286	memset(&sel, 0, sizeof(sel));
	287	sel.which = crop->which;
	288	sel.pad = crop->pad;
5689b288	289	sel.target = V4L2_SEL_TGT_CROP;
5b9d770f SA	290
	291	rval = v4l2_subdev_call(
	292	sd, pad, get_selection, subdev_fh, &sel);
	293
	294	crop->rect = sel.r;
	295
	296	return rval;
f6a5cb1b AK	297	}
	298
	299	case VIDIOC_SUBDEV_S_CROP: {
	300	struct v4l2_subdev_crop *crop = arg;
5b9d770f	301	struct v4l2_subdev_selection sel;
f6a5cb1b	302
b225e398 SA	303	rval = check_crop(sd, crop);
	304	if (rval)
	305	return rval;
f6a5cb1b	306
5b9d770f SA	307	memset(&sel, 0, sizeof(sel));
	308	sel.which = crop->which;
	309	sel.pad = crop->pad;
5689b288	310	sel.target = V4L2_SEL_TGT_CROP;
5b9d770f SA	311	sel.r = crop->rect;
	312
	313	rval = v4l2_subdev_call(
	314	sd, pad, set_selection, subdev_fh, &sel);
	315
	316	crop->rect = sel.r;
	317
	318	return rval;
f6a5cb1b AK	319	}
f6a5cb1b AK	320
333c8b97 LP	321	case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
	322	struct v4l2_subdev_mbus_code_enum *code = arg;
	323
	324	if (code->pad >= sd->entity.num_pads)
	325	return -EINVAL;
	326
	327	return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh,
	328	code);
	329	}
	330
	331	case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
	332	struct v4l2_subdev_frame_size_enum *fse = arg;
	333
	334	if (fse->pad >= sd->entity.num_pads)
	335	return -EINVAL;
	336
	337	return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh,
	338	fse);
	339	}
35c3017a	340
743e1837 SA	341	case VIDIOC_SUBDEV_G_FRAME_INTERVAL: {
	342	struct v4l2_subdev_frame_interval *fi = arg;
	343
	344	if (fi->pad >= sd->entity.num_pads)
	345	return -EINVAL;
	346
35c3017a	347	return v4l2_subdev_call(sd, video, g_frame_interval, arg);
743e1837 SA	348	}
	349
	350	case VIDIOC_SUBDEV_S_FRAME_INTERVAL: {
	351	struct v4l2_subdev_frame_interval *fi = arg;
	352
	353	if (fi->pad >= sd->entity.num_pads)
	354	return -EINVAL;
35c3017a	355
35c3017a	356	return v4l2_subdev_call(sd, video, s_frame_interval, arg);
743e1837	357	}
35c3017a LP	358
	359	case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
	360	struct v4l2_subdev_frame_interval_enum *fie = arg;
	361
	362	if (fie->pad >= sd->entity.num_pads)
	363	return -EINVAL;
	364
	365	return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh,
	366	fie);
	367	}
ae184cda SA	368
	369	case VIDIOC_SUBDEV_G_SELECTION: {
	370	struct v4l2_subdev_selection *sel = arg;
	371
b225e398 SA	372	rval = check_selection(sd, sel);
	373	if (rval)
	374	return rval;
ae184cda SA	375
	376	return v4l2_subdev_call(
	377	sd, pad, get_selection, subdev_fh, sel);
	378	}
	379
	380	case VIDIOC_SUBDEV_S_SELECTION: {
	381	struct v4l2_subdev_selection *sel = arg;
	382
b225e398 SA	383	rval = check_selection(sd, sel);
	384	if (rval)
	385	return rval;
ae184cda SA	386
	387	return v4l2_subdev_call(
	388	sd, pad, set_selection, subdev_fh, sel);
	389	}
ed45ce2c	390
f2e90847 LP	391	case VIDIOC_G_EDID: {
f2e90847 LP	392	struct v4l2_subdev_edid *edid = arg;
ed45ce2c	393
b225e398 SA	394	rval = check_edid(sd, edid);
	395	if (rval)
	396	return rval;
f2e90847 LP	397
	398	return v4l2_subdev_call(sd, pad, get_edid, edid);
	399	}
	400
	401	case VIDIOC_S_EDID: {
	402	struct v4l2_subdev_edid *edid = arg;
	403
b225e398 SA	404	rval = check_edid(sd, edid);
	405	if (rval)
	406	return rval;
f2e90847 LP	407
	408	return v4l2_subdev_call(sd, pad, set_edid, edid);
	409	}
9cfd65e8 LP	410
	411	case VIDIOC_SUBDEV_DV_TIMINGS_CAP: {
	412	struct v4l2_dv_timings_cap *cap = arg;
	413
	414	if (cap->pad >= sd->entity.num_pads)
	415	return -EINVAL;
	416
	417	return v4l2_subdev_call(sd, pad, dv_timings_cap, cap);
	418	}
	419
	420	case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: {
	421	struct v4l2_enum_dv_timings *dvt = arg;
	422
	423	if (dvt->pad >= sd->entity.num_pads)
	424	return -EINVAL;
	425
	426	return v4l2_subdev_call(sd, pad, enum_dv_timings, dvt);
	427	}
	428
	429	case VIDIOC_SUBDEV_QUERY_DV_TIMINGS:
	430	return v4l2_subdev_call(sd, video, query_dv_timings, arg);
	431
	432	case VIDIOC_SUBDEV_G_DV_TIMINGS:
	433	return v4l2_subdev_call(sd, video, g_dv_timings, arg);
	434
	435	case VIDIOC_SUBDEV_S_DV_TIMINGS:
	436	return v4l2_subdev_call(sd, video, s_dv_timings, arg);
333c8b97	437	#endif
2096a5dc	438	default:
c30b46e5	439	return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
2096a5dc LP	440	}
	441
	442	return 0;
	443	}
	444
	445	static long subdev_ioctl(struct file *file, unsigned int cmd,
	446	unsigned long arg)
	447	{
	448	return video_usercopy(file, cmd, arg, subdev_do_ioctl);
	449	}
	450
ab58a301 HV	451	#ifdef CONFIG_COMPAT
	452	static long subdev_compat_ioctl32(struct file *file, unsigned int cmd,
	453	unsigned long arg)
	454	{
	455	struct video_device *vdev = video_devdata(file);
	456	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	457
	458	return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg);
	459	}
	460	#endif
	461
02adb1cc SA	462	static unsigned int subdev_poll(struct file file, poll_table wait)
	463	{
	464	struct video_device *vdev = video_devdata(file);
	465	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	466	struct v4l2_fh *fh = file->private_data;
	467
	468	if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
	469	return POLLERR;
	470
523f46d6	471	poll_wait(file, &fh->wait, wait);
02adb1cc SA	472
	473	if (v4l2_event_pending(fh))
	474	return POLLPRI;
	475
	476	return 0;
	477	}
	478
2096a5dc LP	479	const struct v4l2_file_operations v4l2_subdev_fops = {
	480	.owner = THIS_MODULE,
	481	.open = subdev_open,
	482	.unlocked_ioctl = subdev_ioctl,
ab58a301 HV	483	#ifdef CONFIG_COMPAT
	484	.compat_ioctl32 = subdev_compat_ioctl32,
	485	#endif
2096a5dc	486	.release = subdev_close,
02adb1cc	487	.poll = subdev_poll,
2096a5dc	488	};
3dd5ee08	489
8227c92b SA	490	#ifdef CONFIG_MEDIA_CONTROLLER
	491	int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
	492	struct media_link *link,
	493	struct v4l2_subdev_format *source_fmt,
	494	struct v4l2_subdev_format *sink_fmt)
	495	{
24acf8b2	496	/* The width, height and code must match. */
8227c92b SA	497	if (source_fmt->format.width != sink_fmt->format.width
	498	\|\| source_fmt->format.height != sink_fmt->format.height
	499	\|\| source_fmt->format.code != sink_fmt->format.code)
	500	return -EINVAL;
	501
24acf8b2 LP	502	/* The field order must match, or the sink field order must be NONE
	503	* to support interlaced hardware connected to bridges that support
	504	* progressive formats only.
	505	*/
	506	if (source_fmt->format.field != sink_fmt->format.field &&
	507	sink_fmt->format.field != V4L2_FIELD_NONE)
	508	return -EINVAL;
	509
8227c92b SA	510	return 0;
	511	}
	512	EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default);
	513
	514	static int
	515	v4l2_subdev_link_validate_get_format(struct media_pad *pad,
	516	struct v4l2_subdev_format *fmt)
	517	{
864a1212 LP	518	if (media_entity_type(pad->entity) == MEDIA_ENT_T_V4L2_SUBDEV) {
	519	struct v4l2_subdev *sd =
	520	media_entity_to_v4l2_subdev(pad->entity);
	521
8227c92b SA	522	fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
8227c92b SA	523	fmt->pad = pad->index;
864a1212	524	return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
8227c92b	525	}
864a1212 LP	526
	527	WARN(pad->entity->type != MEDIA_ENT_T_DEVNODE_V4L,
	528	"Driver bug! Wrong media entity type 0x%08x, entity %s\n",
	529	pad->entity->type, pad->entity->name);
	530
	531	return -EINVAL;
8227c92b SA	532	}
	533
	534	int v4l2_subdev_link_validate(struct media_link *link)
	535	{
	536	struct v4l2_subdev *sink;
	537	struct v4l2_subdev_format sink_fmt, source_fmt;
	538	int rval;
	539
	540	rval = v4l2_subdev_link_validate_get_format(
	541	link->source, &source_fmt);
	542	if (rval < 0)
	543	return 0;
	544
	545	rval = v4l2_subdev_link_validate_get_format(
	546	link->sink, &sink_fmt);
	547	if (rval < 0)
	548	return 0;
	549
	550	sink = media_entity_to_v4l2_subdev(link->sink->entity);
	551
	552	rval = v4l2_subdev_call(sink, pad, link_validate, link,
	553	&source_fmt, &sink_fmt);
	554	if (rval != -ENOIOCTLCMD)
	555	return rval;
	556
	557	return v4l2_subdev_link_validate_default(
	558	sink, link, &source_fmt, &sink_fmt);
	559	}
	560	EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);
	561	#endif /* CONFIG_MEDIA_CONTROLLER */
	562
3dd5ee08 LP	563	void v4l2_subdev_init(struct v4l2_subdev sd, const struct v4l2_subdev_ops ops)
	564	{
	565	INIT_LIST_HEAD(&sd->list);
	566	BUG_ON(!ops);
	567	sd->ops = ops;
	568	sd->v4l2_dev = NULL;
	569	sd->flags = 0;
	570	sd->name[0] = '\0';
	571	sd->grp_id = 0;
	572	sd->dev_priv = NULL;
	573	sd->host_priv = NULL;
61f5db54 LP	574	#if defined(CONFIG_MEDIA_CONTROLLER)
	575	sd->entity.name = sd->name;
	576	sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV;
	577	#endif
3dd5ee08 LP	578	}
3dd5ee08 LP	579	EXPORT_SYMBOL(v4l2_subdev_init);