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>
27 #include <linux/export.h>
29 #include <media/v4l2-ctrls.h>
30 #include <media/v4l2-device.h>
31 #include <media/v4l2-ioctl.h>
32 #include <media/v4l2-fh.h>
33 #include <media/v4l2-event.h>
35 static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd)
37 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
38 fh->pad = kzalloc(sizeof(*fh->pad) * sd->entity.num_pads, GFP_KERNEL);
45 static void subdev_fh_free(struct v4l2_subdev_fh *fh)
47 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
53 static int subdev_open(struct file *file)
55 struct video_device *vdev = video_devdata(file);
56 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
57 struct v4l2_subdev_fh *subdev_fh;
58 #if defined(CONFIG_MEDIA_CONTROLLER)
59 struct media_entity *entity = NULL;
63 subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
64 if (subdev_fh == NULL)
67 ret = subdev_fh_init(subdev_fh, sd);
73 v4l2_fh_init(&subdev_fh->vfh, vdev);
74 v4l2_fh_add(&subdev_fh->vfh);
75 file->private_data = &subdev_fh->vfh;
76 #if defined(CONFIG_MEDIA_CONTROLLER)
77 if (sd->v4l2_dev->mdev) {
78 entity = media_entity_get(&sd->entity);
86 if (sd->internal_ops && sd->internal_ops->open) {
87 ret = sd->internal_ops->open(sd, subdev_fh);
95 #if defined(CONFIG_MEDIA_CONTROLLER)
97 media_entity_put(entity);
99 v4l2_fh_del(&subdev_fh->vfh);
100 v4l2_fh_exit(&subdev_fh->vfh);
101 subdev_fh_free(subdev_fh);
107 static int subdev_close(struct file *file)
109 struct video_device *vdev = video_devdata(file);
110 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
111 struct v4l2_fh *vfh = file->private_data;
112 struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
114 if (sd->internal_ops && sd->internal_ops->close)
115 sd->internal_ops->close(sd, subdev_fh);
116 #if defined(CONFIG_MEDIA_CONTROLLER)
117 if (sd->v4l2_dev->mdev)
118 media_entity_put(&sd->entity);
122 subdev_fh_free(subdev_fh);
124 file->private_data = NULL;
129 static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
131 struct video_device *vdev = video_devdata(file);
132 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
133 struct v4l2_fh *vfh = file->private_data;
134 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
135 struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
139 case VIDIOC_QUERYCTRL:
140 return v4l2_queryctrl(vfh->ctrl_handler, arg);
142 case VIDIOC_QUERYMENU:
143 return v4l2_querymenu(vfh->ctrl_handler, arg);
146 return v4l2_g_ctrl(vfh->ctrl_handler, arg);
149 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
151 case VIDIOC_G_EXT_CTRLS:
152 return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);
154 case VIDIOC_S_EXT_CTRLS:
155 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);
157 case VIDIOC_TRY_EXT_CTRLS:
158 return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);
161 if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
164 return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);
166 case VIDIOC_SUBSCRIBE_EVENT:
167 return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);
169 case VIDIOC_UNSUBSCRIBE_EVENT:
170 return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);
172 #ifdef CONFIG_VIDEO_ADV_DEBUG
173 case VIDIOC_DBG_G_REGISTER:
175 struct v4l2_dbg_register *p = arg;
177 if (!capable(CAP_SYS_ADMIN))
179 return v4l2_subdev_call(sd, core, g_register, p);
181 case VIDIOC_DBG_S_REGISTER:
183 struct v4l2_dbg_register *p = arg;
185 if (!capable(CAP_SYS_ADMIN))
187 return v4l2_subdev_call(sd, core, s_register, p);
191 case VIDIOC_LOG_STATUS: {
194 pr_info("%s: ================= START STATUS =================\n",
196 ret = v4l2_subdev_call(sd, core, log_status);
197 pr_info("%s: ================== END STATUS ==================\n",
202 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
203 case VIDIOC_SUBDEV_G_FMT: {
204 struct v4l2_subdev_format *format = arg;
206 if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
207 format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
210 if (format->pad >= sd->entity.num_pads)
213 return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh, format);
216 case VIDIOC_SUBDEV_S_FMT: {
217 struct v4l2_subdev_format *format = arg;
219 if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
220 format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
223 if (format->pad >= sd->entity.num_pads)
226 return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh, format);
229 case VIDIOC_SUBDEV_G_CROP: {
230 struct v4l2_subdev_crop *crop = arg;
231 struct v4l2_subdev_selection sel;
234 if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
235 crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
238 if (crop->pad >= sd->entity.num_pads)
241 rval = v4l2_subdev_call(sd, pad, get_crop, subdev_fh, crop);
242 if (rval != -ENOIOCTLCMD)
245 memset(&sel, 0, sizeof(sel));
246 sel.which = crop->which;
248 sel.target = V4L2_SEL_TGT_CROP;
250 rval = v4l2_subdev_call(
251 sd, pad, get_selection, subdev_fh, &sel);
258 case VIDIOC_SUBDEV_S_CROP: {
259 struct v4l2_subdev_crop *crop = arg;
260 struct v4l2_subdev_selection sel;
263 if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
264 crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
267 if (crop->pad >= sd->entity.num_pads)
270 rval = v4l2_subdev_call(sd, pad, set_crop, subdev_fh, crop);
271 if (rval != -ENOIOCTLCMD)
274 memset(&sel, 0, sizeof(sel));
275 sel.which = crop->which;
277 sel.target = V4L2_SEL_TGT_CROP;
280 rval = v4l2_subdev_call(
281 sd, pad, set_selection, subdev_fh, &sel);
288 case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
289 struct v4l2_subdev_mbus_code_enum *code = arg;
291 if (code->pad >= sd->entity.num_pads)
294 return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh,
298 case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
299 struct v4l2_subdev_frame_size_enum *fse = arg;
301 if (fse->pad >= sd->entity.num_pads)
304 return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh,
308 case VIDIOC_SUBDEV_G_FRAME_INTERVAL: {
309 struct v4l2_subdev_frame_interval *fi = arg;
311 if (fi->pad >= sd->entity.num_pads)
314 return v4l2_subdev_call(sd, video, g_frame_interval, arg);
317 case VIDIOC_SUBDEV_S_FRAME_INTERVAL: {
318 struct v4l2_subdev_frame_interval *fi = arg;
320 if (fi->pad >= sd->entity.num_pads)
323 return v4l2_subdev_call(sd, video, s_frame_interval, arg);
326 case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
327 struct v4l2_subdev_frame_interval_enum *fie = arg;
329 if (fie->pad >= sd->entity.num_pads)
332 return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh,
336 case VIDIOC_SUBDEV_G_SELECTION: {
337 struct v4l2_subdev_selection *sel = arg;
339 if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
340 sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
343 if (sel->pad >= sd->entity.num_pads)
346 return v4l2_subdev_call(
347 sd, pad, get_selection, subdev_fh, sel);
350 case VIDIOC_SUBDEV_S_SELECTION: {
351 struct v4l2_subdev_selection *sel = arg;
353 if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
354 sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
357 if (sel->pad >= sd->entity.num_pads)
360 return v4l2_subdev_call(
361 sd, pad, set_selection, subdev_fh, sel);
364 case VIDIOC_G_EDID: {
365 struct v4l2_subdev_edid *edid = arg;
367 if (edid->pad >= sd->entity.num_pads)
369 if (edid->blocks && edid->edid == NULL)
372 return v4l2_subdev_call(sd, pad, get_edid, edid);
375 case VIDIOC_S_EDID: {
376 struct v4l2_subdev_edid *edid = arg;
378 if (edid->pad >= sd->entity.num_pads)
380 if (edid->blocks && edid->edid == NULL)
383 return v4l2_subdev_call(sd, pad, set_edid, edid);
386 case VIDIOC_SUBDEV_DV_TIMINGS_CAP: {
387 struct v4l2_dv_timings_cap *cap = arg;
389 if (cap->pad >= sd->entity.num_pads)
392 return v4l2_subdev_call(sd, pad, dv_timings_cap, cap);
395 case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: {
396 struct v4l2_enum_dv_timings *dvt = arg;
398 if (dvt->pad >= sd->entity.num_pads)
401 return v4l2_subdev_call(sd, pad, enum_dv_timings, dvt);
404 case VIDIOC_SUBDEV_QUERY_DV_TIMINGS:
405 return v4l2_subdev_call(sd, video, query_dv_timings, arg);
407 case VIDIOC_SUBDEV_G_DV_TIMINGS:
408 return v4l2_subdev_call(sd, video, g_dv_timings, arg);
410 case VIDIOC_SUBDEV_S_DV_TIMINGS:
411 return v4l2_subdev_call(sd, video, s_dv_timings, arg);
414 return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
420 static long subdev_ioctl(struct file *file, unsigned int cmd,
423 return video_usercopy(file, cmd, arg, subdev_do_ioctl);
427 static long subdev_compat_ioctl32(struct file *file, unsigned int cmd,
430 struct video_device *vdev = video_devdata(file);
431 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
433 return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg);
437 static unsigned int subdev_poll(struct file *file, poll_table *wait)
439 struct video_device *vdev = video_devdata(file);
440 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
441 struct v4l2_fh *fh = file->private_data;
443 if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
446 poll_wait(file, &fh->wait, wait);
448 if (v4l2_event_pending(fh))
454 const struct v4l2_file_operations v4l2_subdev_fops = {
455 .owner = THIS_MODULE,
457 .unlocked_ioctl = subdev_ioctl,
459 .compat_ioctl32 = subdev_compat_ioctl32,
461 .release = subdev_close,
465 #ifdef CONFIG_MEDIA_CONTROLLER
466 int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
467 struct media_link *link,
468 struct v4l2_subdev_format *source_fmt,
469 struct v4l2_subdev_format *sink_fmt)
471 if (source_fmt->format.width != sink_fmt->format.width
472 || source_fmt->format.height != sink_fmt->format.height
473 || source_fmt->format.code != sink_fmt->format.code)
478 EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default);
481 v4l2_subdev_link_validate_get_format(struct media_pad *pad,
482 struct v4l2_subdev_format *fmt)
484 if (media_entity_type(pad->entity) == MEDIA_ENT_T_V4L2_SUBDEV) {
485 struct v4l2_subdev *sd =
486 media_entity_to_v4l2_subdev(pad->entity);
488 fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
489 fmt->pad = pad->index;
490 return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
493 WARN(pad->entity->type != MEDIA_ENT_T_DEVNODE_V4L,
494 "Driver bug! Wrong media entity type 0x%08x, entity %s\n",
495 pad->entity->type, pad->entity->name);
500 int v4l2_subdev_link_validate(struct media_link *link)
502 struct v4l2_subdev *sink;
503 struct v4l2_subdev_format sink_fmt, source_fmt;
506 rval = v4l2_subdev_link_validate_get_format(
507 link->source, &source_fmt);
511 rval = v4l2_subdev_link_validate_get_format(
512 link->sink, &sink_fmt);
516 sink = media_entity_to_v4l2_subdev(link->sink->entity);
518 rval = v4l2_subdev_call(sink, pad, link_validate, link,
519 &source_fmt, &sink_fmt);
520 if (rval != -ENOIOCTLCMD)
523 return v4l2_subdev_link_validate_default(
524 sink, link, &source_fmt, &sink_fmt);
526 EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);
527 #endif /* CONFIG_MEDIA_CONTROLLER */
529 void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops)
531 INIT_LIST_HEAD(&sd->list);
539 sd->host_priv = NULL;
540 #if defined(CONFIG_MEDIA_CONTROLLER)
541 sd->entity.name = sd->name;
542 sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV;
545 EXPORT_SYMBOL(v4l2_subdev_init);