[GitHub/mt8127/android_kernel_alcatel_ttab.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 <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)
	/* Allocate try format and crop in the same memory block */
	fh->try_fmt = kzalloc((sizeof(*fh->try_fmt) + sizeof(*fh->try_crop))
			      * sd->entity.num_pads, GFP_KERNEL);
	if (fh->try_fmt == NULL)
		return -ENOMEM;

	fh->try_crop = (struct v4l2_rect *)
		(fh->try_fmt + sd->entity.num_pads);
#endif
	return 0;
}

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

	ret = v4l2_fh_init(&subdev_fh->vfh, vdev);
	if (ret)
		goto err;

	if (sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS) {
		ret = v4l2_event_init(&subdev_fh->vfh);
		if (ret)
			goto err;

		ret = v4l2_event_alloc(&subdev_fh->vfh, sd->nevents);
		if (ret)
			goto err;
	}

	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(sd->ctrl_handler, arg);

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

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

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

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

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

	case VIDIOC_TRY_EXT_CTRLS:
		return v4l2_try_ext_ctrls(sd->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);
#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;

		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 v4l2_subdev_call(sd, pad, get_crop, subdev_fh, crop);
	}

	case VIDIOC_SUBDEV_S_CROP: {
		struct v4l2_subdev_crop *crop = arg;

		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 v4l2_subdev_call(sd, pad, set_crop, subdev_fh, crop);
	}

	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);
	}
#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->events->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,
};

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 LP	26	#include <linux/videodev2.h>
2096a5dc LP	27
ea8aa434	28	#include <media/v4l2-ctrls.h>
2096a5dc LP	29	#include <media/v4l2-device.h>
2096a5dc LP	30	#include <media/v4l2-ioctl.h>
02adb1cc SA	31	#include <media/v4l2-fh.h>
02adb1cc SA	32	#include <media/v4l2-event.h>
2096a5dc	33
7cd5a16b SV	34	static int subdev_fh_init(struct v4l2_subdev_fh fh, struct v4l2_subdev sd)
	35	{
	36	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	37	/* Allocate try format and crop in the same memory block */
	38	fh->try_fmt = kzalloc((sizeof(fh->try_fmt) + sizeof(fh->try_crop))
	39	* sd->entity.num_pads, GFP_KERNEL);
	40	if (fh->try_fmt == NULL)
	41	return -ENOMEM;
	42
	43	fh->try_crop = (struct v4l2_rect *)
	44	(fh->try_fmt + sd->entity.num_pads);
	45	#endif
	46	return 0;
	47	}
	48
	49	static void subdev_fh_free(struct v4l2_subdev_fh *fh)
	50	{
	51	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	52	kfree(fh->try_fmt);
	53	fh->try_fmt = NULL;
	54	fh->try_crop = NULL;
	55	#endif
	56	}
	57
2096a5dc LP	58	static int subdev_open(struct file *file)
2096a5dc LP	59	{
02adb1cc SA	60	struct video_device *vdev = video_devdata(file);
02adb1cc SA	61	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
7cd5a16b	62	struct v4l2_subdev_fh *subdev_fh;
61f5db54	63	#if defined(CONFIG_MEDIA_CONTROLLER)
f0beea8f	64	struct media_entity *entity = NULL;
61f5db54	65	#endif
02adb1cc SA	66	int ret;
02adb1cc SA	67
7cd5a16b SV	68	subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
	69	if (subdev_fh == NULL)
	70	return -ENOMEM;
02adb1cc	71
7cd5a16b SV	72	ret = subdev_fh_init(subdev_fh, sd);
	73	if (ret) {
	74	kfree(subdev_fh);
	75	return ret;
	76	}
	77
	78	ret = v4l2_fh_init(&subdev_fh->vfh, vdev);
	79	if (ret)
	80	goto err;
02adb1cc	81
7cd5a16b SV	82	if (sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS) {
7cd5a16b SV	83	ret = v4l2_event_init(&subdev_fh->vfh);
02adb1cc SA	84	if (ret)
	85	goto err;
	86
7cd5a16b	87	ret = v4l2_event_alloc(&subdev_fh->vfh, sd->nevents);
02adb1cc SA	88	if (ret)
02adb1cc SA	89	goto err;
02adb1cc	90	}
7cd5a16b SV	91
	92	v4l2_fh_add(&subdev_fh->vfh);
	93	file->private_data = &subdev_fh->vfh;
61f5db54 LP	94	#if defined(CONFIG_MEDIA_CONTROLLER)
	95	if (sd->v4l2_dev->mdev) {
	96	entity = media_entity_get(&sd->entity);
	97	if (!entity) {
	98	ret = -EBUSY;
	99	goto err;
	100	}
	101	}
	102	#endif
7cd5a16b	103
f0beea8f LP	104	if (sd->internal_ops && sd->internal_ops->open) {
	105	ret = sd->internal_ops->open(sd, subdev_fh);
	106	if (ret < 0)
	107	goto err;
	108	}
	109
2096a5dc	110	return 0;
02adb1cc SA	111
02adb1cc SA	112	err:
f0beea8f LP	113	#if defined(CONFIG_MEDIA_CONTROLLER)
	114	if (entity)
	115	media_entity_put(entity);
	116	#endif
7cd5a16b SV	117	v4l2_fh_del(&subdev_fh->vfh);
	118	v4l2_fh_exit(&subdev_fh->vfh);
	119	subdev_fh_free(subdev_fh);
	120	kfree(subdev_fh);
02adb1cc SA	121
02adb1cc SA	122	return ret;
2096a5dc LP	123	}
	124
	125	static int subdev_close(struct file *file)
	126	{
61f5db54 LP	127	struct video_device *vdev = video_devdata(file);
61f5db54 LP	128	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
02adb1cc	129	struct v4l2_fh *vfh = file->private_data;
7cd5a16b	130	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
02adb1cc	131
f0beea8f LP	132	if (sd->internal_ops && sd->internal_ops->close)
f0beea8f LP	133	sd->internal_ops->close(sd, subdev_fh);
61f5db54 LP	134	#if defined(CONFIG_MEDIA_CONTROLLER)
	135	if (sd->v4l2_dev->mdev)
	136	media_entity_put(&sd->entity);
	137	#endif
7cd5a16b SV	138	v4l2_fh_del(vfh);
	139	v4l2_fh_exit(vfh);
	140	subdev_fh_free(subdev_fh);
	141	kfree(subdev_fh);
	142	file->private_data = NULL;
02adb1cc	143
2096a5dc LP	144	return 0;
	145	}
	146
	147	static long subdev_do_ioctl(struct file file, unsigned int cmd, void arg)
	148	{
ea8aa434 LP	149	struct video_device *vdev = video_devdata(file);
ea8aa434 LP	150	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
7cd5a16b	151	struct v4l2_fh *vfh = file->private_data;
333c8b97 LP	152	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	153	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
	154	#endif
ea8aa434	155
2096a5dc	156	switch (cmd) {
ea8aa434	157	case VIDIOC_QUERYCTRL:
0b84834a	158	return v4l2_queryctrl(sd->ctrl_handler, arg);
ea8aa434 LP	159
ea8aa434 LP	160	case VIDIOC_QUERYMENU:
0b84834a	161	return v4l2_querymenu(sd->ctrl_handler, arg);
ea8aa434 LP	162
ea8aa434 LP	163	case VIDIOC_G_CTRL:
0b84834a	164	return v4l2_g_ctrl(sd->ctrl_handler, arg);
ea8aa434 LP	165
ea8aa434 LP	166	case VIDIOC_S_CTRL:
0b84834a	167	return v4l2_s_ctrl(sd->ctrl_handler, arg);
ea8aa434 LP	168
ea8aa434 LP	169	case VIDIOC_G_EXT_CTRLS:
0b84834a	170	return v4l2_g_ext_ctrls(sd->ctrl_handler, arg);
ea8aa434 LP	171
ea8aa434 LP	172	case VIDIOC_S_EXT_CTRLS:
0b84834a	173	return v4l2_s_ext_ctrls(sd->ctrl_handler, arg);
ea8aa434 LP	174
ea8aa434 LP	175	case VIDIOC_TRY_EXT_CTRLS:
0b84834a	176	return v4l2_try_ext_ctrls(sd->ctrl_handler, arg);
ea8aa434	177
02adb1cc SA	178	case VIDIOC_DQEVENT:
	179	if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
	180	return -ENOIOCTLCMD;
	181
7cd5a16b	182	return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);
02adb1cc SA	183
02adb1cc SA	184	case VIDIOC_SUBSCRIBE_EVENT:
7cd5a16b	185	return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);
02adb1cc SA	186
02adb1cc SA	187	case VIDIOC_UNSUBSCRIBE_EVENT:
7cd5a16b	188	return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);
333c8b97 LP	189	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	190	case VIDIOC_SUBDEV_G_FMT: {
	191	struct v4l2_subdev_format *format = arg;
	192
	193	if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
	194	format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	195	return -EINVAL;
	196
	197	if (format->pad >= sd->entity.num_pads)
	198	return -EINVAL;
	199
	200	return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh, format);
	201	}
	202
	203	case VIDIOC_SUBDEV_S_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;
02adb1cc	212
333c8b97 LP	213	return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh, format);
	214	}
	215
f6a5cb1b AK	216	case VIDIOC_SUBDEV_G_CROP: {
	217	struct v4l2_subdev_crop *crop = arg;
	218
	219	if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
	220	crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	221	return -EINVAL;
	222
	223	if (crop->pad >= sd->entity.num_pads)
	224	return -EINVAL;
	225
	226	return v4l2_subdev_call(sd, pad, get_crop, subdev_fh, crop);
	227	}
	228
	229	case VIDIOC_SUBDEV_S_CROP: {
	230	struct v4l2_subdev_crop *crop = arg;
	231
	232	if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
	233	crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	234	return -EINVAL;
	235
	236	if (crop->pad >= sd->entity.num_pads)
	237	return -EINVAL;
	238
	239	return v4l2_subdev_call(sd, pad, set_crop, subdev_fh, crop);
	240	}
	241
333c8b97 LP	242	case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
	243	struct v4l2_subdev_mbus_code_enum *code = arg;
	244
	245	if (code->pad >= sd->entity.num_pads)
	246	return -EINVAL;
	247
	248	return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh,
	249	code);
	250	}
	251
	252	case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
	253	struct v4l2_subdev_frame_size_enum *fse = arg;
	254
	255	if (fse->pad >= sd->entity.num_pads)
	256	return -EINVAL;
	257
	258	return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh,
	259	fse);
	260	}
35c3017a LP	261
	262	case VIDIOC_SUBDEV_G_FRAME_INTERVAL:
	263	return v4l2_subdev_call(sd, video, g_frame_interval, arg);
	264
	265	case VIDIOC_SUBDEV_S_FRAME_INTERVAL:
	266	return v4l2_subdev_call(sd, video, s_frame_interval, arg);
	267
	268	case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
	269	struct v4l2_subdev_frame_interval_enum *fie = arg;
	270
	271	if (fie->pad >= sd->entity.num_pads)
	272	return -EINVAL;
	273
	274	return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh,
	275	fie);
	276	}
333c8b97	277	#endif
2096a5dc	278	default:
c30b46e5	279	return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
2096a5dc LP	280	}
	281
	282	return 0;
	283	}
	284
	285	static long subdev_ioctl(struct file *file, unsigned int cmd,
	286	unsigned long arg)
	287	{
	288	return video_usercopy(file, cmd, arg, subdev_do_ioctl);
	289	}
	290
02adb1cc SA	291	static unsigned int subdev_poll(struct file file, poll_table wait)
	292	{
	293	struct video_device *vdev = video_devdata(file);
	294	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	295	struct v4l2_fh *fh = file->private_data;
	296
	297	if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
	298	return POLLERR;
	299
	300	poll_wait(file, &fh->events->wait, wait);
	301
	302	if (v4l2_event_pending(fh))
	303	return POLLPRI;
	304
	305	return 0;
	306	}
	307
2096a5dc LP	308	const struct v4l2_file_operations v4l2_subdev_fops = {
	309	.owner = THIS_MODULE,
	310	.open = subdev_open,
	311	.unlocked_ioctl = subdev_ioctl,
	312	.release = subdev_close,
02adb1cc	313	.poll = subdev_poll,
2096a5dc	314	};
3dd5ee08 LP	315
	316	void v4l2_subdev_init(struct v4l2_subdev sd, const struct v4l2_subdev_ops ops)
	317	{
	318	INIT_LIST_HEAD(&sd->list);
	319	BUG_ON(!ops);
	320	sd->ops = ops;
	321	sd->v4l2_dev = NULL;
	322	sd->flags = 0;
	323	sd->name[0] = '\0';
	324	sd->grp_id = 0;
	325	sd->dev_priv = NULL;
	326	sd->host_priv = NULL;
61f5db54 LP	327	#if defined(CONFIG_MEDIA_CONTROLLER)
	328	sd->entity.name = sd->name;
	329	sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV;
	330	#endif
3dd5ee08 LP	331	}
3dd5ee08 LP	332	EXPORT_SYMBOL(v4l2_subdev_init);