4 * Copyright (C) 2010 Nokia Corporation
6 * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
7 * Sakari Ailus <sakari.ailus@iki.fi>
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.
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.
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
23 #include <linux/ioctl.h>
24 #include <linux/slab.h>
25 #include <linux/types.h>
26 #include <linux/videodev2.h>
28 #include <media/v4l2-ctrls.h>
29 #include <media/v4l2-device.h>
30 #include <media/v4l2-ioctl.h>
31 #include <media/v4l2-fh.h>
32 #include <media/v4l2-event.h>
34 static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd)
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)
43 fh->try_crop = (struct v4l2_rect *)
44 (fh->try_fmt + sd->entity.num_pads);
49 static void subdev_fh_free(struct v4l2_subdev_fh *fh)
51 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
58 static int subdev_open(struct file *file)
60 struct video_device *vdev = video_devdata(file);
61 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
62 struct v4l2_subdev_fh *subdev_fh;
63 #if defined(CONFIG_MEDIA_CONTROLLER)
64 struct media_entity *entity = NULL;
68 subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
69 if (subdev_fh == NULL)
72 ret = subdev_fh_init(subdev_fh, sd);
78 v4l2_fh_init(&subdev_fh->vfh, vdev);
79 v4l2_fh_add(&subdev_fh->vfh);
80 file->private_data = &subdev_fh->vfh;
81 #if defined(CONFIG_MEDIA_CONTROLLER)
82 if (sd->v4l2_dev->mdev) {
83 entity = media_entity_get(&sd->entity);
91 if (sd->internal_ops && sd->internal_ops->open) {
92 ret = sd->internal_ops->open(sd, subdev_fh);
100 #if defined(CONFIG_MEDIA_CONTROLLER)
102 media_entity_put(entity);
104 v4l2_fh_del(&subdev_fh->vfh);
105 v4l2_fh_exit(&subdev_fh->vfh);
106 subdev_fh_free(subdev_fh);
112 static int subdev_close(struct file *file)
114 struct video_device *vdev = video_devdata(file);
115 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
116 struct v4l2_fh *vfh = file->private_data;
117 struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
119 if (sd->internal_ops && sd->internal_ops->close)
120 sd->internal_ops->close(sd, subdev_fh);
121 #if defined(CONFIG_MEDIA_CONTROLLER)
122 if (sd->v4l2_dev->mdev)
123 media_entity_put(&sd->entity);
127 subdev_fh_free(subdev_fh);
129 file->private_data = NULL;
134 static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
136 struct video_device *vdev = video_devdata(file);
137 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
138 struct v4l2_fh *vfh = file->private_data;
139 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
140 struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
144 case VIDIOC_QUERYCTRL:
145 return v4l2_queryctrl(vfh->ctrl_handler, arg);
147 case VIDIOC_QUERYMENU:
148 return v4l2_querymenu(vfh->ctrl_handler, arg);
151 return v4l2_g_ctrl(vfh->ctrl_handler, arg);
154 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
156 case VIDIOC_G_EXT_CTRLS:
157 return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);
159 case VIDIOC_S_EXT_CTRLS:
160 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);
162 case VIDIOC_TRY_EXT_CTRLS:
163 return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);
166 if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
169 return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);
171 case VIDIOC_SUBSCRIBE_EVENT:
172 return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);
174 case VIDIOC_UNSUBSCRIBE_EVENT:
175 return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);
176 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
177 case VIDIOC_SUBDEV_G_FMT: {
178 struct v4l2_subdev_format *format = arg;
180 if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
181 format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
184 if (format->pad >= sd->entity.num_pads)
187 return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh, format);
190 case VIDIOC_SUBDEV_S_FMT: {
191 struct v4l2_subdev_format *format = arg;
193 if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
194 format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
197 if (format->pad >= sd->entity.num_pads)
200 return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh, format);
203 case VIDIOC_SUBDEV_G_CROP: {
204 struct v4l2_subdev_crop *crop = arg;
206 if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
207 crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
210 if (crop->pad >= sd->entity.num_pads)
213 return v4l2_subdev_call(sd, pad, get_crop, subdev_fh, crop);
216 case VIDIOC_SUBDEV_S_CROP: {
217 struct v4l2_subdev_crop *crop = arg;
219 if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
220 crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
223 if (crop->pad >= sd->entity.num_pads)
226 return v4l2_subdev_call(sd, pad, set_crop, subdev_fh, crop);
229 case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
230 struct v4l2_subdev_mbus_code_enum *code = arg;
232 if (code->pad >= sd->entity.num_pads)
235 return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh,
239 case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
240 struct v4l2_subdev_frame_size_enum *fse = arg;
242 if (fse->pad >= sd->entity.num_pads)
245 return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh,
249 case VIDIOC_SUBDEV_G_FRAME_INTERVAL:
250 return v4l2_subdev_call(sd, video, g_frame_interval, arg);
252 case VIDIOC_SUBDEV_S_FRAME_INTERVAL:
253 return v4l2_subdev_call(sd, video, s_frame_interval, arg);
255 case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
256 struct v4l2_subdev_frame_interval_enum *fie = arg;
258 if (fie->pad >= sd->entity.num_pads)
261 return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh,
266 return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
272 static long subdev_ioctl(struct file *file, unsigned int cmd,
275 return video_usercopy(file, cmd, arg, subdev_do_ioctl);
278 static unsigned int subdev_poll(struct file *file, poll_table *wait)
280 struct video_device *vdev = video_devdata(file);
281 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
282 struct v4l2_fh *fh = file->private_data;
284 if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
287 poll_wait(file, &fh->wait, wait);
289 if (v4l2_event_pending(fh))
295 const struct v4l2_file_operations v4l2_subdev_fops = {
296 .owner = THIS_MODULE,
298 .unlocked_ioctl = subdev_ioctl,
299 .release = subdev_close,
303 void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops)
305 INIT_LIST_HEAD(&sd->list);
313 sd->host_priv = NULL;
314 #if defined(CONFIG_MEDIA_CONTROLLER)
315 sd->entity.name = sd->name;
316 sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV;
319 EXPORT_SYMBOL(v4l2_subdev_init);