[deliverable/linux.git] / drivers / media / video / 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;
}

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);
#endif

	switch (cmd) {
	case VIDIOC_QUERYCTRL:
		return v4l2_queryctrl(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;

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

	case VIDIOC_SUBDEV_S_FMT: {
		struct v4l2_subdev_format *format = arg;

		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 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;
		int rval;

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

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

		rval = v4l2_subdev_call(sd, pad, get_crop, subdev_fh, crop);
		if (rval != -ENOIOCTLCMD)
			return rval;

		memset(&sel, 0, sizeof(sel));
		sel.which = crop->which;
		sel.pad = crop->pad;
		sel.target = V4L2_SUBDEV_SEL_TGT_CROP_ACTUAL;

		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;
		int rval;

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

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

		rval = v4l2_subdev_call(sd, pad, set_crop, subdev_fh, crop);
		if (rval != -ENOIOCTLCMD)
			return rval;

		memset(&sel, 0, sizeof(sel));
		sel.which = crop->which;
		sel.pad = crop->pad;
		sel.target = V4L2_SUBDEV_SEL_TGT_CROP_ACTUAL;
		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:
		return v4l2_subdev_call(sd, video, g_frame_interval, arg);

	case VIDIOC_SUBDEV_S_FRAME_INTERVAL:
		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;

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

	case VIDIOC_SUBDEV_S_SELECTION: {
		struct v4l2_subdev_selection *sel = arg;

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

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,
	.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)
{
	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;

	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)
{
	switch (media_entity_type(pad->entity)) {
	case MEDIA_ENT_T_V4L2_SUBDEV:
		fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
		fmt->pad = pad->index;
		return v4l2_subdev_call(media_entity_to_v4l2_subdev(
						pad->entity),
					pad, get_fmt, NULL, fmt);
	default:
		WARN(1, "Driver bug! Wrong media entity type %d, entity %s\n",
		     media_entity_type(pad->entity), pad->entity->name);
		/* Fall through */
	case MEDIA_ENT_T_DEVNODE_V4L:
		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
	129	static long subdev_do_ioctl(struct file file, unsigned int cmd, void arg)
	130	{
ea8aa434 LP	131	struct video_device *vdev = video_devdata(file);
ea8aa434 LP	132	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
7cd5a16b	133	struct v4l2_fh *vfh = file->private_data;
333c8b97 LP	134	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	135	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
	136	#endif
ea8aa434	137
2096a5dc	138	switch (cmd) {
ea8aa434	139	case VIDIOC_QUERYCTRL:
18d171ba	140	return v4l2_queryctrl(vfh->ctrl_handler, arg);
ea8aa434 LP	141
ea8aa434 LP	142	case VIDIOC_QUERYMENU:
18d171ba	143	return v4l2_querymenu(vfh->ctrl_handler, arg);
ea8aa434 LP	144
ea8aa434 LP	145	case VIDIOC_G_CTRL:
18d171ba	146	return v4l2_g_ctrl(vfh->ctrl_handler, arg);
ea8aa434 LP	147
ea8aa434 LP	148	case VIDIOC_S_CTRL:
ab892bac	149	return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
ea8aa434 LP	150
ea8aa434 LP	151	case VIDIOC_G_EXT_CTRLS:
18d171ba	152	return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);
ea8aa434 LP	153
ea8aa434 LP	154	case VIDIOC_S_EXT_CTRLS:
ab892bac	155	return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);
ea8aa434 LP	156
ea8aa434 LP	157	case VIDIOC_TRY_EXT_CTRLS:
18d171ba	158	return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);
ea8aa434	159
02adb1cc SA	160	case VIDIOC_DQEVENT:
	161	if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
	162	return -ENOIOCTLCMD;
	163
7cd5a16b	164	return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);
02adb1cc SA	165
02adb1cc SA	166	case VIDIOC_SUBSCRIBE_EVENT:
7cd5a16b	167	return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);
02adb1cc SA	168
02adb1cc SA	169	case VIDIOC_UNSUBSCRIBE_EVENT:
7cd5a16b	170	return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);
69967a71 MH	171
	172	#ifdef CONFIG_VIDEO_ADV_DEBUG
	173	case VIDIOC_DBG_G_REGISTER:
	174	{
	175	struct v4l2_dbg_register *p = arg;
	176
	177	if (!capable(CAP_SYS_ADMIN))
	178	return -EPERM;
	179	return v4l2_subdev_call(sd, core, g_register, p);
	180	}
	181	case VIDIOC_DBG_S_REGISTER:
	182	{
	183	struct v4l2_dbg_register *p = arg;
	184
	185	if (!capable(CAP_SYS_ADMIN))
	186	return -EPERM;
	187	return v4l2_subdev_call(sd, core, s_register, p);
	188	}
	189	#endif
bcd158de	190
42194e72 HV	191	case VIDIOC_LOG_STATUS: {
	192	int ret;
	193
	194	pr_info("%s: ================= START STATUS =================\n",
	195	sd->name);
	196	ret = v4l2_subdev_call(sd, core, log_status);
	197	pr_info("%s: ================== END STATUS ==================\n",
	198	sd->name);
	199	return ret;
	200	}
bcd158de	201
333c8b97 LP	202	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	203	case VIDIOC_SUBDEV_G_FMT: {
	204	struct v4l2_subdev_format *format = arg;
	205
	206	if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
	207	format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	208	return -EINVAL;
	209
	210	if (format->pad >= sd->entity.num_pads)
	211	return -EINVAL;
	212
	213	return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh, format);
	214	}
	215
	216	case VIDIOC_SUBDEV_S_FMT: {
	217	struct v4l2_subdev_format *format = arg;
	218
	219	if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
	220	format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	221	return -EINVAL;
	222
	223	if (format->pad >= sd->entity.num_pads)
	224	return -EINVAL;
02adb1cc	225
333c8b97 LP	226	return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh, format);
	227	}
	228
f6a5cb1b AK	229	case VIDIOC_SUBDEV_G_CROP: {
f6a5cb1b AK	230	struct v4l2_subdev_crop *crop = arg;
5b9d770f SA	231	struct v4l2_subdev_selection sel;
5b9d770f SA	232	int rval;
f6a5cb1b AK	233
	234	if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
	235	crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	236	return -EINVAL;
	237
	238	if (crop->pad >= sd->entity.num_pads)
	239	return -EINVAL;
	240
5b9d770f SA	241	rval = v4l2_subdev_call(sd, pad, get_crop, subdev_fh, crop);
	242	if (rval != -ENOIOCTLCMD)
	243	return rval;
	244
	245	memset(&sel, 0, sizeof(sel));
	246	sel.which = crop->which;
	247	sel.pad = crop->pad;
	248	sel.target = V4L2_SUBDEV_SEL_TGT_CROP_ACTUAL;
	249
	250	rval = v4l2_subdev_call(
	251	sd, pad, get_selection, subdev_fh, &sel);
	252
	253	crop->rect = sel.r;
	254
	255	return rval;
f6a5cb1b AK	256	}
	257
	258	case VIDIOC_SUBDEV_S_CROP: {
	259	struct v4l2_subdev_crop *crop = arg;
5b9d770f SA	260	struct v4l2_subdev_selection sel;
5b9d770f SA	261	int rval;
f6a5cb1b AK	262
	263	if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
	264	crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	265	return -EINVAL;
	266
	267	if (crop->pad >= sd->entity.num_pads)
	268	return -EINVAL;
	269
5b9d770f SA	270	rval = v4l2_subdev_call(sd, pad, set_crop, subdev_fh, crop);
	271	if (rval != -ENOIOCTLCMD)
	272	return rval;
	273
	274	memset(&sel, 0, sizeof(sel));
	275	sel.which = crop->which;
	276	sel.pad = crop->pad;
	277	sel.target = V4L2_SUBDEV_SEL_TGT_CROP_ACTUAL;
	278	sel.r = crop->rect;
	279
	280	rval = v4l2_subdev_call(
	281	sd, pad, set_selection, subdev_fh, &sel);
	282
	283	crop->rect = sel.r;
	284
	285	return rval;
f6a5cb1b AK	286	}
f6a5cb1b AK	287
333c8b97 LP	288	case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
	289	struct v4l2_subdev_mbus_code_enum *code = arg;
	290
	291	if (code->pad >= sd->entity.num_pads)
	292	return -EINVAL;
	293
	294	return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh,
	295	code);
	296	}
	297
	298	case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
	299	struct v4l2_subdev_frame_size_enum *fse = arg;
	300
	301	if (fse->pad >= sd->entity.num_pads)
	302	return -EINVAL;
	303
	304	return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh,
	305	fse);
	306	}
35c3017a LP	307
	308	case VIDIOC_SUBDEV_G_FRAME_INTERVAL:
	309	return v4l2_subdev_call(sd, video, g_frame_interval, arg);
	310
	311	case VIDIOC_SUBDEV_S_FRAME_INTERVAL:
	312	return v4l2_subdev_call(sd, video, s_frame_interval, arg);
	313
	314	case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
	315	struct v4l2_subdev_frame_interval_enum *fie = arg;
	316
	317	if (fie->pad >= sd->entity.num_pads)
	318	return -EINVAL;
	319
	320	return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh,
	321	fie);
	322	}
ae184cda SA	323
	324	case VIDIOC_SUBDEV_G_SELECTION: {
	325	struct v4l2_subdev_selection *sel = arg;
	326
	327	if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
	328	sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	329	return -EINVAL;
	330
	331	if (sel->pad >= sd->entity.num_pads)
	332	return -EINVAL;
	333
	334	return v4l2_subdev_call(
	335	sd, pad, get_selection, subdev_fh, sel);
	336	}
	337
	338	case VIDIOC_SUBDEV_S_SELECTION: {
	339	struct v4l2_subdev_selection *sel = arg;
	340
	341	if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
	342	sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	343	return -EINVAL;
	344
	345	if (sel->pad >= sd->entity.num_pads)
	346	return -EINVAL;
	347
	348	return v4l2_subdev_call(
	349	sd, pad, set_selection, subdev_fh, sel);
	350	}
333c8b97	351	#endif
2096a5dc	352	default:
c30b46e5	353	return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
2096a5dc LP	354	}
	355
	356	return 0;
	357	}
	358
	359	static long subdev_ioctl(struct file *file, unsigned int cmd,
	360	unsigned long arg)
	361	{
	362	return video_usercopy(file, cmd, arg, subdev_do_ioctl);
	363	}
	364
02adb1cc SA	365	static unsigned int subdev_poll(struct file file, poll_table wait)
	366	{
	367	struct video_device *vdev = video_devdata(file);
	368	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	369	struct v4l2_fh *fh = file->private_data;
	370
	371	if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
	372	return POLLERR;
	373
523f46d6	374	poll_wait(file, &fh->wait, wait);
02adb1cc SA	375
	376	if (v4l2_event_pending(fh))
	377	return POLLPRI;
	378
	379	return 0;
	380	}
	381
2096a5dc LP	382	const struct v4l2_file_operations v4l2_subdev_fops = {
	383	.owner = THIS_MODULE,
	384	.open = subdev_open,
	385	.unlocked_ioctl = subdev_ioctl,
	386	.release = subdev_close,
02adb1cc	387	.poll = subdev_poll,
2096a5dc	388	};
3dd5ee08	389
8227c92b SA	390	#ifdef CONFIG_MEDIA_CONTROLLER
	391	int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
	392	struct media_link *link,
	393	struct v4l2_subdev_format *source_fmt,
	394	struct v4l2_subdev_format *sink_fmt)
	395	{
	396	if (source_fmt->format.width != sink_fmt->format.width
	397	\|\| source_fmt->format.height != sink_fmt->format.height
	398	\|\| source_fmt->format.code != sink_fmt->format.code)
	399	return -EINVAL;
	400
	401	return 0;
	402	}
	403	EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default);
	404
	405	static int
	406	v4l2_subdev_link_validate_get_format(struct media_pad *pad,
	407	struct v4l2_subdev_format *fmt)
	408	{
	409	switch (media_entity_type(pad->entity)) {
	410	case MEDIA_ENT_T_V4L2_SUBDEV:
	411	fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
	412	fmt->pad = pad->index;
	413	return v4l2_subdev_call(media_entity_to_v4l2_subdev(
	414	pad->entity),
	415	pad, get_fmt, NULL, fmt);
	416	default:
	417	WARN(1, "Driver bug! Wrong media entity type %d, entity %s\n",
	418	media_entity_type(pad->entity), pad->entity->name);
	419	/* Fall through */
	420	case MEDIA_ENT_T_DEVNODE_V4L:
	421	return -EINVAL;
	422	}
	423	}
	424
	425	int v4l2_subdev_link_validate(struct media_link *link)
	426	{
	427	struct v4l2_subdev *sink;
	428	struct v4l2_subdev_format sink_fmt, source_fmt;
	429	int rval;
	430
	431	rval = v4l2_subdev_link_validate_get_format(
	432	link->source, &source_fmt);
	433	if (rval < 0)
	434	return 0;
	435
	436	rval = v4l2_subdev_link_validate_get_format(
	437	link->sink, &sink_fmt);
	438	if (rval < 0)
	439	return 0;
	440
	441	sink = media_entity_to_v4l2_subdev(link->sink->entity);
	442
	443	rval = v4l2_subdev_call(sink, pad, link_validate, link,
	444	&source_fmt, &sink_fmt);
	445	if (rval != -ENOIOCTLCMD)
	446	return rval;
	447
	448	return v4l2_subdev_link_validate_default(
	449	sink, link, &source_fmt, &sink_fmt);
	450	}
	451	EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);
	452	#endif /* CONFIG_MEDIA_CONTROLLER */
	453
3dd5ee08 LP	454	void v4l2_subdev_init(struct v4l2_subdev sd, const struct v4l2_subdev_ops ops)
	455	{
	456	INIT_LIST_HEAD(&sd->list);
	457	BUG_ON(!ops);
	458	sd->ops = ops;
	459	sd->v4l2_dev = NULL;
	460	sd->flags = 0;
	461	sd->name[0] = '\0';
	462	sd->grp_id = 0;
	463	sd->dev_priv = NULL;
	464	sd->host_priv = NULL;
61f5db54 LP	465	#if defined(CONFIG_MEDIA_CONTROLLER)
	466	sd->entity.name = sd->name;
	467	sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV;
	468	#endif
3dd5ee08 LP	469	}
3dd5ee08 LP	470	EXPORT_SYMBOL(v4l2_subdev_init);