[linux-2.6-block.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)
	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->pad, 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->pad, 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->pad, &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->pad, &sel);

		crop->rect = sel.r;

		return rval;
	}

	case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
		struct v4l2_subdev_mbus_code_enum *code = arg;

		if (code->which != V4L2_SUBDEV_FORMAT_TRY &&
		    code->which != V4L2_SUBDEV_FORMAT_ACTIVE)
			return -EINVAL;

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

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

	case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
		struct v4l2_subdev_frame_size_enum *fse = arg;

		if (fse->which != V4L2_SUBDEV_FORMAT_TRY &&
		    fse->which != V4L2_SUBDEV_FORMAT_ACTIVE)
			return -EINVAL;

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

		return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh->pad,
					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->which != V4L2_SUBDEV_FORMAT_TRY &&
		    fie->which != V4L2_SUBDEV_FORMAT_ACTIVE)
			return -EINVAL;

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

		return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh->pad,
					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->pad, 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->pad, 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	95	#if defined(CONFIG_MEDIA_CONTROLLER)
5164d6aa	96	media_entity_put(entity);
f0beea8f	97	#endif
7cd5a16b SV	98	v4l2_fh_del(&subdev_fh->vfh);
	99	v4l2_fh_exit(&subdev_fh->vfh);
	100	subdev_fh_free(subdev_fh);
	101	kfree(subdev_fh);
02adb1cc SA	102
02adb1cc SA	103	return ret;
2096a5dc LP	104	}
	105
	106	static int subdev_close(struct file *file)
	107	{
61f5db54 LP	108	struct video_device *vdev = video_devdata(file);
61f5db54 LP	109	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
02adb1cc	110	struct v4l2_fh *vfh = file->private_data;
7cd5a16b	111	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
02adb1cc	112
f0beea8f LP	113	if (sd->internal_ops && sd->internal_ops->close)
f0beea8f LP	114	sd->internal_ops->close(sd, subdev_fh);
61f5db54 LP	115	#if defined(CONFIG_MEDIA_CONTROLLER)
	116	if (sd->v4l2_dev->mdev)
	117	media_entity_put(&sd->entity);
	118	#endif
7cd5a16b SV	119	v4l2_fh_del(vfh);
	120	v4l2_fh_exit(vfh);
	121	subdev_fh_free(subdev_fh);
	122	kfree(subdev_fh);
	123	file->private_data = NULL;
02adb1cc	124
2096a5dc LP	125	return 0;
	126	}
	127
d352bcc9	128	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
b225e398 SA	129	static int check_format(struct v4l2_subdev *sd,
	130	struct v4l2_subdev_format *format)
	131	{
	132	if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
	133	format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	134	return -EINVAL;
	135
	136	if (format->pad >= sd->entity.num_pads)
	137	return -EINVAL;
	138
	139	return 0;
	140	}
	141
	142	static int check_crop(struct v4l2_subdev sd, struct v4l2_subdev_crop crop)
	143	{
	144	if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
	145	crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	146	return -EINVAL;
	147
	148	if (crop->pad >= sd->entity.num_pads)
	149	return -EINVAL;
	150
	151	return 0;
	152	}
	153
	154	static int check_selection(struct v4l2_subdev *sd,
	155	struct v4l2_subdev_selection *sel)
	156	{
	157	if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
	158	sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	159	return -EINVAL;
	160
	161	if (sel->pad >= sd->entity.num_pads)
	162	return -EINVAL;
	163
	164	return 0;
	165	}
	166
	167	static int check_edid(struct v4l2_subdev sd, struct v4l2_subdev_edid edid)
	168	{
	169	if (edid->pad >= sd->entity.num_pads)
	170	return -EINVAL;
	171
	172	if (edid->blocks && edid->edid == NULL)
	173	return -EINVAL;
	174
	175	return 0;
	176	}
d352bcc9	177	#endif
b225e398	178
2096a5dc LP	179	static long subdev_do_ioctl(struct file file, unsigned int cmd, void arg)
2096a5dc LP	180	{
ea8aa434 LP	181	struct video_device *vdev = video_devdata(file);
ea8aa434 LP	182	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
7cd5a16b	183	struct v4l2_fh *vfh = file->private_data;
333c8b97 LP	184	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
333c8b97 LP	185	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
b225e398	186	int rval;
d352bcc9	187	#endif
ea8aa434	188
2096a5dc	189	switch (cmd) {
ea8aa434	190	case VIDIOC_QUERYCTRL:
18d171ba	191	return v4l2_queryctrl(vfh->ctrl_handler, arg);
ea8aa434	192
e6bee368 HV	193	case VIDIOC_QUERY_EXT_CTRL:
	194	return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg);
	195
ea8aa434	196	case VIDIOC_QUERYMENU:
18d171ba	197	return v4l2_querymenu(vfh->ctrl_handler, arg);
ea8aa434 LP	198
ea8aa434 LP	199	case VIDIOC_G_CTRL:
18d171ba	200	return v4l2_g_ctrl(vfh->ctrl_handler, arg);
ea8aa434 LP	201
ea8aa434 LP	202	case VIDIOC_S_CTRL:
ab892bac	203	return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
ea8aa434 LP	204
ea8aa434 LP	205	case VIDIOC_G_EXT_CTRLS:
18d171ba	206	return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);
ea8aa434 LP	207
ea8aa434 LP	208	case VIDIOC_S_EXT_CTRLS:
ab892bac	209	return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);
ea8aa434 LP	210
ea8aa434 LP	211	case VIDIOC_TRY_EXT_CTRLS:
18d171ba	212	return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);
ea8aa434	213
02adb1cc SA	214	case VIDIOC_DQEVENT:
	215	if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
	216	return -ENOIOCTLCMD;
	217
7cd5a16b	218	return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);
02adb1cc SA	219
02adb1cc SA	220	case VIDIOC_SUBSCRIBE_EVENT:
7cd5a16b	221	return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);
02adb1cc SA	222
02adb1cc SA	223	case VIDIOC_UNSUBSCRIBE_EVENT:
7cd5a16b	224	return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);
69967a71 MH	225
	226	#ifdef CONFIG_VIDEO_ADV_DEBUG
	227	case VIDIOC_DBG_G_REGISTER:
	228	{
	229	struct v4l2_dbg_register *p = arg;
	230
	231	if (!capable(CAP_SYS_ADMIN))
	232	return -EPERM;
	233	return v4l2_subdev_call(sd, core, g_register, p);
	234	}
	235	case VIDIOC_DBG_S_REGISTER:
	236	{
	237	struct v4l2_dbg_register *p = arg;
	238
	239	if (!capable(CAP_SYS_ADMIN))
	240	return -EPERM;
	241	return v4l2_subdev_call(sd, core, s_register, p);
	242	}
	243	#endif
bcd158de	244
42194e72 HV	245	case VIDIOC_LOG_STATUS: {
	246	int ret;
	247
	248	pr_info("%s: ================= START STATUS =================\n",
	249	sd->name);
	250	ret = v4l2_subdev_call(sd, core, log_status);
	251	pr_info("%s: ================== END STATUS ==================\n",
	252	sd->name);
	253	return ret;
	254	}
bcd158de	255
333c8b97 LP	256	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	257	case VIDIOC_SUBDEV_G_FMT: {
	258	struct v4l2_subdev_format *format = arg;
	259
b225e398 SA	260	rval = check_format(sd, format);
	261	if (rval)
	262	return rval;
333c8b97	263
f7234138	264	return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh->pad, format);
333c8b97 LP	265	}
	266
	267	case VIDIOC_SUBDEV_S_FMT: {
	268	struct v4l2_subdev_format *format = arg;
	269
b225e398 SA	270	rval = check_format(sd, format);
	271	if (rval)
	272	return rval;
02adb1cc	273
f7234138	274	return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh->pad, format);
333c8b97 LP	275	}
333c8b97 LP	276
f6a5cb1b AK	277	case VIDIOC_SUBDEV_G_CROP: {
f6a5cb1b AK	278	struct v4l2_subdev_crop *crop = arg;
5b9d770f	279	struct v4l2_subdev_selection sel;
f6a5cb1b	280
b225e398 SA	281	rval = check_crop(sd, crop);
	282	if (rval)
	283	return rval;
f6a5cb1b	284
5b9d770f SA	285	memset(&sel, 0, sizeof(sel));
	286	sel.which = crop->which;
	287	sel.pad = crop->pad;
5689b288	288	sel.target = V4L2_SEL_TGT_CROP;
5b9d770f SA	289
5b9d770f SA	290	rval = v4l2_subdev_call(
f7234138	291	sd, pad, get_selection, subdev_fh->pad, &sel);
5b9d770f SA	292
	293	crop->rect = sel.r;
	294
	295	return rval;
f6a5cb1b AK	296	}
	297
	298	case VIDIOC_SUBDEV_S_CROP: {
	299	struct v4l2_subdev_crop *crop = arg;
5b9d770f	300	struct v4l2_subdev_selection sel;
f6a5cb1b	301
b225e398 SA	302	rval = check_crop(sd, crop);
	303	if (rval)
	304	return rval;
f6a5cb1b	305
5b9d770f SA	306	memset(&sel, 0, sizeof(sel));
	307	sel.which = crop->which;
	308	sel.pad = crop->pad;
5689b288	309	sel.target = V4L2_SEL_TGT_CROP;
5b9d770f SA	310	sel.r = crop->rect;
	311
	312	rval = v4l2_subdev_call(
f7234138	313	sd, pad, set_selection, subdev_fh->pad, &sel);
5b9d770f SA	314
	315	crop->rect = sel.r;
	316
	317	return rval;
f6a5cb1b AK	318	}
f6a5cb1b AK	319
333c8b97 LP	320	case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
	321	struct v4l2_subdev_mbus_code_enum *code = arg;
	322
20058f90 HV	323	if (code->which != V4L2_SUBDEV_FORMAT_TRY &&
	324	code->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	325	return -EINVAL;
	326
333c8b97 LP	327	if (code->pad >= sd->entity.num_pads)
	328	return -EINVAL;
	329
f7234138	330	return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh->pad,
333c8b97 LP	331	code);
	332	}
	333
	334	case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
	335	struct v4l2_subdev_frame_size_enum *fse = arg;
	336
20058f90 HV	337	if (fse->which != V4L2_SUBDEV_FORMAT_TRY &&
	338	fse->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	339	return -EINVAL;
	340
333c8b97 LP	341	if (fse->pad >= sd->entity.num_pads)
	342	return -EINVAL;
	343
f7234138	344	return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh->pad,
333c8b97 LP	345	fse);
333c8b97 LP	346	}
35c3017a	347
743e1837 SA	348	case VIDIOC_SUBDEV_G_FRAME_INTERVAL: {
	349	struct v4l2_subdev_frame_interval *fi = arg;
	350
	351	if (fi->pad >= sd->entity.num_pads)
	352	return -EINVAL;
	353
35c3017a	354	return v4l2_subdev_call(sd, video, g_frame_interval, arg);
743e1837 SA	355	}
	356
	357	case VIDIOC_SUBDEV_S_FRAME_INTERVAL: {
	358	struct v4l2_subdev_frame_interval *fi = arg;
	359
	360	if (fi->pad >= sd->entity.num_pads)
	361	return -EINVAL;
35c3017a	362
35c3017a	363	return v4l2_subdev_call(sd, video, s_frame_interval, arg);
743e1837	364	}
35c3017a LP	365
	366	case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
	367	struct v4l2_subdev_frame_interval_enum *fie = arg;
	368
20058f90 HV	369	if (fie->which != V4L2_SUBDEV_FORMAT_TRY &&
	370	fie->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	371	return -EINVAL;
	372
35c3017a LP	373	if (fie->pad >= sd->entity.num_pads)
	374	return -EINVAL;
	375
f7234138	376	return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh->pad,
35c3017a LP	377	fie);
35c3017a LP	378	}
ae184cda SA	379
	380	case VIDIOC_SUBDEV_G_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
ae184cda SA	387	return v4l2_subdev_call(
f7234138	388	sd, pad, get_selection, subdev_fh->pad, sel);
ae184cda SA	389	}
	390
	391	case VIDIOC_SUBDEV_S_SELECTION: {
	392	struct v4l2_subdev_selection *sel = arg;
	393
b225e398 SA	394	rval = check_selection(sd, sel);
	395	if (rval)
	396	return rval;
ae184cda SA	397
ae184cda SA	398	return v4l2_subdev_call(
f7234138	399	sd, pad, set_selection, subdev_fh->pad, sel);
ae184cda	400	}
ed45ce2c	401
f2e90847 LP	402	case VIDIOC_G_EDID: {
f2e90847 LP	403	struct v4l2_subdev_edid *edid = arg;
ed45ce2c	404
b225e398 SA	405	rval = check_edid(sd, edid);
	406	if (rval)
	407	return rval;
f2e90847 LP	408
	409	return v4l2_subdev_call(sd, pad, get_edid, edid);
	410	}
	411
	412	case VIDIOC_S_EDID: {
	413	struct v4l2_subdev_edid *edid = arg;
	414
b225e398 SA	415	rval = check_edid(sd, edid);
	416	if (rval)
	417	return rval;
f2e90847 LP	418
	419	return v4l2_subdev_call(sd, pad, set_edid, edid);
	420	}
9cfd65e8 LP	421
	422	case VIDIOC_SUBDEV_DV_TIMINGS_CAP: {
	423	struct v4l2_dv_timings_cap *cap = arg;
	424
	425	if (cap->pad >= sd->entity.num_pads)
	426	return -EINVAL;
	427
	428	return v4l2_subdev_call(sd, pad, dv_timings_cap, cap);
	429	}
	430
	431	case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: {
	432	struct v4l2_enum_dv_timings *dvt = arg;
	433
	434	if (dvt->pad >= sd->entity.num_pads)
	435	return -EINVAL;
	436
	437	return v4l2_subdev_call(sd, pad, enum_dv_timings, dvt);
	438	}
	439
	440	case VIDIOC_SUBDEV_QUERY_DV_TIMINGS:
	441	return v4l2_subdev_call(sd, video, query_dv_timings, arg);
	442
	443	case VIDIOC_SUBDEV_G_DV_TIMINGS:
	444	return v4l2_subdev_call(sd, video, g_dv_timings, arg);
	445
	446	case VIDIOC_SUBDEV_S_DV_TIMINGS:
	447	return v4l2_subdev_call(sd, video, s_dv_timings, arg);
333c8b97	448	#endif
2096a5dc	449	default:
c30b46e5	450	return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
2096a5dc LP	451	}
	452
	453	return 0;
	454	}
	455
	456	static long subdev_ioctl(struct file *file, unsigned int cmd,
	457	unsigned long arg)
	458	{
	459	return video_usercopy(file, cmd, arg, subdev_do_ioctl);
	460	}
	461
ab58a301 HV	462	#ifdef CONFIG_COMPAT
	463	static long subdev_compat_ioctl32(struct file *file, unsigned int cmd,
	464	unsigned long arg)
	465	{
	466	struct video_device *vdev = video_devdata(file);
	467	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	468
	469	return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg);
	470	}
	471	#endif
	472
02adb1cc SA	473	static unsigned int subdev_poll(struct file file, poll_table wait)
	474	{
	475	struct video_device *vdev = video_devdata(file);
	476	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	477	struct v4l2_fh *fh = file->private_data;
	478
	479	if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
	480	return POLLERR;
	481
523f46d6	482	poll_wait(file, &fh->wait, wait);
02adb1cc SA	483
	484	if (v4l2_event_pending(fh))
	485	return POLLPRI;
	486
	487	return 0;
	488	}
	489
2096a5dc LP	490	const struct v4l2_file_operations v4l2_subdev_fops = {
	491	.owner = THIS_MODULE,
	492	.open = subdev_open,
	493	.unlocked_ioctl = subdev_ioctl,
ab58a301 HV	494	#ifdef CONFIG_COMPAT
	495	.compat_ioctl32 = subdev_compat_ioctl32,
	496	#endif
2096a5dc	497	.release = subdev_close,
02adb1cc	498	.poll = subdev_poll,
2096a5dc	499	};
3dd5ee08	500
8227c92b SA	501	#ifdef CONFIG_MEDIA_CONTROLLER
	502	int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
	503	struct media_link *link,
	504	struct v4l2_subdev_format *source_fmt,
	505	struct v4l2_subdev_format *sink_fmt)
	506	{
24acf8b2	507	/* The width, height and code must match. */
8227c92b SA	508	if (source_fmt->format.width != sink_fmt->format.width
	509	\|\| source_fmt->format.height != sink_fmt->format.height
	510	\|\| source_fmt->format.code != sink_fmt->format.code)
	511	return -EINVAL;
	512
24acf8b2 LP	513	/* The field order must match, or the sink field order must be NONE
	514	* to support interlaced hardware connected to bridges that support
	515	* progressive formats only.
	516	*/
	517	if (source_fmt->format.field != sink_fmt->format.field &&
	518	sink_fmt->format.field != V4L2_FIELD_NONE)
	519	return -EINVAL;
	520
8227c92b SA	521	return 0;
	522	}
	523	EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default);
	524
	525	static int
	526	v4l2_subdev_link_validate_get_format(struct media_pad *pad,
	527	struct v4l2_subdev_format *fmt)
	528	{
864a1212 LP	529	if (media_entity_type(pad->entity) == MEDIA_ENT_T_V4L2_SUBDEV) {
	530	struct v4l2_subdev *sd =
	531	media_entity_to_v4l2_subdev(pad->entity);
	532
8227c92b SA	533	fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
8227c92b SA	534	fmt->pad = pad->index;
864a1212	535	return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
8227c92b	536	}
864a1212 LP	537
	538	WARN(pad->entity->type != MEDIA_ENT_T_DEVNODE_V4L,
	539	"Driver bug! Wrong media entity type 0x%08x, entity %s\n",
	540	pad->entity->type, pad->entity->name);
	541
	542	return -EINVAL;
8227c92b SA	543	}
	544
	545	int v4l2_subdev_link_validate(struct media_link *link)
	546	{
	547	struct v4l2_subdev *sink;
	548	struct v4l2_subdev_format sink_fmt, source_fmt;
	549	int rval;
	550
	551	rval = v4l2_subdev_link_validate_get_format(
	552	link->source, &source_fmt);
	553	if (rval < 0)
	554	return 0;
	555
	556	rval = v4l2_subdev_link_validate_get_format(
	557	link->sink, &sink_fmt);
	558	if (rval < 0)
	559	return 0;
	560
	561	sink = media_entity_to_v4l2_subdev(link->sink->entity);
	562
	563	rval = v4l2_subdev_call(sink, pad, link_validate, link,
	564	&source_fmt, &sink_fmt);
	565	if (rval != -ENOIOCTLCMD)
	566	return rval;
	567
	568	return v4l2_subdev_link_validate_default(
	569	sink, link, &source_fmt, &sink_fmt);
	570	}
	571	EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);
	572	#endif /* CONFIG_MEDIA_CONTROLLER */
	573
3dd5ee08 LP	574	void v4l2_subdev_init(struct v4l2_subdev sd, const struct v4l2_subdev_ops ops)
	575	{
	576	INIT_LIST_HEAD(&sd->list);
	577	BUG_ON(!ops);
	578	sd->ops = ops;
	579	sd->v4l2_dev = NULL;
	580	sd->flags = 0;
	581	sd->name[0] = '\0';
	582	sd->grp_id = 0;
	583	sd->dev_priv = NULL;
	584	sd->host_priv = NULL;
61f5db54 LP	585	#if defined(CONFIG_MEDIA_CONTROLLER)
	586	sd->entity.name = sd->name;
	587	sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV;
	588	#endif
3dd5ee08 LP	589	}
3dd5ee08 LP	590	EXPORT_SYMBOL(v4l2_subdev_init);