[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)
	/* 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;
	}

	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:
		return v4l2_subdev_call(sd, core, log_status);

#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->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	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)
	38	/* Allocate try format and crop in the same memory block */
	39	fh->try_fmt = kzalloc((sizeof(fh->try_fmt) + sizeof(fh->try_crop))
	40	* sd->entity.num_pads, GFP_KERNEL);
	41	if (fh->try_fmt == NULL)
	42	return -ENOMEM;
	43
	44	fh->try_crop = (struct v4l2_rect *)
	45	(fh->try_fmt + sd->entity.num_pads);
	46	#endif
	47	return 0;
	48	}
	49
	50	static void subdev_fh_free(struct v4l2_subdev_fh *fh)
	51	{
	52	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	53	kfree(fh->try_fmt);
	54	fh->try_fmt = NULL;
	55	fh->try_crop = NULL;
	56	#endif
	57	}
	58
2096a5dc LP	59	static int subdev_open(struct file *file)
2096a5dc LP	60	{
02adb1cc SA	61	struct video_device *vdev = video_devdata(file);
02adb1cc SA	62	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
7cd5a16b	63	struct v4l2_subdev_fh *subdev_fh;
61f5db54	64	#if defined(CONFIG_MEDIA_CONTROLLER)
f0beea8f	65	struct media_entity *entity = NULL;
61f5db54	66	#endif
02adb1cc SA	67	int ret;
02adb1cc SA	68
7cd5a16b SV	69	subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
	70	if (subdev_fh == NULL)
	71	return -ENOMEM;
02adb1cc	72
7cd5a16b SV	73	ret = subdev_fh_init(subdev_fh, sd);
	74	if (ret) {
	75	kfree(subdev_fh);
	76	return ret;
	77	}
	78
523f46d6	79	v4l2_fh_init(&subdev_fh->vfh, vdev);
7cd5a16b SV	80	v4l2_fh_add(&subdev_fh->vfh);
7cd5a16b SV	81	file->private_data = &subdev_fh->vfh;
61f5db54 LP	82	#if defined(CONFIG_MEDIA_CONTROLLER)
	83	if (sd->v4l2_dev->mdev) {
	84	entity = media_entity_get(&sd->entity);
	85	if (!entity) {
	86	ret = -EBUSY;
	87	goto err;
	88	}
	89	}
	90	#endif
7cd5a16b	91
f0beea8f LP	92	if (sd->internal_ops && sd->internal_ops->open) {
	93	ret = sd->internal_ops->open(sd, subdev_fh);
	94	if (ret < 0)
	95	goto err;
	96	}
	97
2096a5dc	98	return 0;
02adb1cc SA	99
02adb1cc SA	100	err:
f0beea8f LP	101	#if defined(CONFIG_MEDIA_CONTROLLER)
	102	if (entity)
	103	media_entity_put(entity);
	104	#endif
7cd5a16b SV	105	v4l2_fh_del(&subdev_fh->vfh);
	106	v4l2_fh_exit(&subdev_fh->vfh);
	107	subdev_fh_free(subdev_fh);
	108	kfree(subdev_fh);
02adb1cc SA	109
02adb1cc SA	110	return ret;
2096a5dc LP	111	}
	112
	113	static int subdev_close(struct file *file)
	114	{
61f5db54 LP	115	struct video_device *vdev = video_devdata(file);
61f5db54 LP	116	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
02adb1cc	117	struct v4l2_fh *vfh = file->private_data;
7cd5a16b	118	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
02adb1cc	119
f0beea8f LP	120	if (sd->internal_ops && sd->internal_ops->close)
f0beea8f LP	121	sd->internal_ops->close(sd, subdev_fh);
61f5db54 LP	122	#if defined(CONFIG_MEDIA_CONTROLLER)
	123	if (sd->v4l2_dev->mdev)
	124	media_entity_put(&sd->entity);
	125	#endif
7cd5a16b SV	126	v4l2_fh_del(vfh);
	127	v4l2_fh_exit(vfh);
	128	subdev_fh_free(subdev_fh);
	129	kfree(subdev_fh);
	130	file->private_data = NULL;
02adb1cc	131
2096a5dc LP	132	return 0;
	133	}
	134
	135	static long subdev_do_ioctl(struct file file, unsigned int cmd, void arg)
	136	{
ea8aa434 LP	137	struct video_device *vdev = video_devdata(file);
ea8aa434 LP	138	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
7cd5a16b	139	struct v4l2_fh *vfh = file->private_data;
333c8b97 LP	140	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	141	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
	142	#endif
ea8aa434	143
2096a5dc	144	switch (cmd) {
ea8aa434	145	case VIDIOC_QUERYCTRL:
18d171ba	146	return v4l2_queryctrl(vfh->ctrl_handler, arg);
ea8aa434 LP	147
ea8aa434 LP	148	case VIDIOC_QUERYMENU:
18d171ba	149	return v4l2_querymenu(vfh->ctrl_handler, arg);
ea8aa434 LP	150
ea8aa434 LP	151	case VIDIOC_G_CTRL:
18d171ba	152	return v4l2_g_ctrl(vfh->ctrl_handler, arg);
ea8aa434 LP	153
ea8aa434 LP	154	case VIDIOC_S_CTRL:
ab892bac	155	return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
ea8aa434 LP	156
ea8aa434 LP	157	case VIDIOC_G_EXT_CTRLS:
18d171ba	158	return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);
ea8aa434 LP	159
ea8aa434 LP	160	case VIDIOC_S_EXT_CTRLS:
ab892bac	161	return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);
ea8aa434 LP	162
ea8aa434 LP	163	case VIDIOC_TRY_EXT_CTRLS:
18d171ba	164	return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);
ea8aa434	165
02adb1cc SA	166	case VIDIOC_DQEVENT:
	167	if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
	168	return -ENOIOCTLCMD;
	169
7cd5a16b	170	return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);
02adb1cc SA	171
02adb1cc SA	172	case VIDIOC_SUBSCRIBE_EVENT:
7cd5a16b	173	return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);
02adb1cc SA	174
02adb1cc SA	175	case VIDIOC_UNSUBSCRIBE_EVENT:
7cd5a16b	176	return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);
69967a71 MH	177
	178	#ifdef CONFIG_VIDEO_ADV_DEBUG
	179	case VIDIOC_DBG_G_REGISTER:
	180	{
	181	struct v4l2_dbg_register *p = arg;
	182
	183	if (!capable(CAP_SYS_ADMIN))
	184	return -EPERM;
	185	return v4l2_subdev_call(sd, core, g_register, p);
	186	}
	187	case VIDIOC_DBG_S_REGISTER:
	188	{
	189	struct v4l2_dbg_register *p = arg;
	190
	191	if (!capable(CAP_SYS_ADMIN))
	192	return -EPERM;
	193	return v4l2_subdev_call(sd, core, s_register, p);
	194	}
	195	#endif
bcd158de SN	196
	197	case VIDIOC_LOG_STATUS:
	198	return v4l2_subdev_call(sd, core, log_status);
	199
333c8b97 LP	200	#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
	201	case VIDIOC_SUBDEV_G_FMT: {
	202	struct v4l2_subdev_format *format = arg;
	203
	204	if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
	205	format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	206	return -EINVAL;
	207
	208	if (format->pad >= sd->entity.num_pads)
	209	return -EINVAL;
	210
	211	return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh, format);
	212	}
	213
	214	case VIDIOC_SUBDEV_S_FMT: {
	215	struct v4l2_subdev_format *format = arg;
	216
	217	if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
	218	format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	219	return -EINVAL;
	220
	221	if (format->pad >= sd->entity.num_pads)
	222	return -EINVAL;
02adb1cc	223
333c8b97 LP	224	return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh, format);
	225	}
	226
f6a5cb1b AK	227	case VIDIOC_SUBDEV_G_CROP: {
	228	struct v4l2_subdev_crop *crop = arg;
	229
	230	if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
	231	crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	232	return -EINVAL;
	233
	234	if (crop->pad >= sd->entity.num_pads)
	235	return -EINVAL;
	236
	237	return v4l2_subdev_call(sd, pad, get_crop, subdev_fh, crop);
	238	}
	239
	240	case VIDIOC_SUBDEV_S_CROP: {
	241	struct v4l2_subdev_crop *crop = arg;
	242
	243	if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
	244	crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
	245	return -EINVAL;
	246
	247	if (crop->pad >= sd->entity.num_pads)
	248	return -EINVAL;
	249
	250	return v4l2_subdev_call(sd, pad, set_crop, subdev_fh, crop);
	251	}
	252
333c8b97 LP	253	case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
	254	struct v4l2_subdev_mbus_code_enum *code = arg;
	255
	256	if (code->pad >= sd->entity.num_pads)
	257	return -EINVAL;
	258
	259	return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh,
	260	code);
	261	}
	262
	263	case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
	264	struct v4l2_subdev_frame_size_enum *fse = arg;
	265
	266	if (fse->pad >= sd->entity.num_pads)
	267	return -EINVAL;
	268
	269	return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh,
	270	fse);
	271	}
35c3017a LP	272
	273	case VIDIOC_SUBDEV_G_FRAME_INTERVAL:
	274	return v4l2_subdev_call(sd, video, g_frame_interval, arg);
	275
	276	case VIDIOC_SUBDEV_S_FRAME_INTERVAL:
	277	return v4l2_subdev_call(sd, video, s_frame_interval, arg);
	278
	279	case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
	280	struct v4l2_subdev_frame_interval_enum *fie = arg;
	281
	282	if (fie->pad >= sd->entity.num_pads)
	283	return -EINVAL;
	284
	285	return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh,
	286	fie);
	287	}
333c8b97	288	#endif
2096a5dc	289	default:
c30b46e5	290	return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
2096a5dc LP	291	}
	292
	293	return 0;
	294	}
	295
	296	static long subdev_ioctl(struct file *file, unsigned int cmd,
	297	unsigned long arg)
	298	{
	299	return video_usercopy(file, cmd, arg, subdev_do_ioctl);
	300	}
	301
02adb1cc SA	302	static unsigned int subdev_poll(struct file file, poll_table wait)
	303	{
	304	struct video_device *vdev = video_devdata(file);
	305	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	306	struct v4l2_fh *fh = file->private_data;
	307
	308	if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
	309	return POLLERR;
	310
523f46d6	311	poll_wait(file, &fh->wait, wait);
02adb1cc SA	312
	313	if (v4l2_event_pending(fh))
	314	return POLLPRI;
	315
	316	return 0;
	317	}
	318
2096a5dc LP	319	const struct v4l2_file_operations v4l2_subdev_fops = {
	320	.owner = THIS_MODULE,
	321	.open = subdev_open,
	322	.unlocked_ioctl = subdev_ioctl,
	323	.release = subdev_close,
02adb1cc	324	.poll = subdev_poll,
2096a5dc	325	};
3dd5ee08 LP	326
	327	void v4l2_subdev_init(struct v4l2_subdev sd, const struct v4l2_subdev_ops ops)
	328	{
	329	INIT_LIST_HEAD(&sd->list);
	330	BUG_ON(!ops);
	331	sd->ops = ops;
	332	sd->v4l2_dev = NULL;
	333	sd->flags = 0;
	334	sd->name[0] = '\0';
	335	sd->grp_id = 0;
	336	sd->dev_priv = NULL;
	337	sd->host_priv = NULL;
61f5db54 LP	338	#if defined(CONFIG_MEDIA_CONTROLLER)
	339	sd->entity.name = sd->name;
	340	sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV;
	341	#endif
3dd5ee08 LP	342	}
3dd5ee08 LP	343	EXPORT_SYMBOL(v4l2_subdev_init);