1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19#include <linux/ioctl.h>
20#include <linux/mm.h>
21#include <linux/slab.h>
22#include <linux/types.h>
23#include <linux/videodev2.h>
24#include <linux/export.h>
25
26#include <media/v4l2-ctrls.h>
27#include <media/v4l2-device.h>
28#include <media/v4l2-ioctl.h>
29#include <media/v4l2-fh.h>
30#include <media/v4l2-event.h>
31
32static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd)
33{
34#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
35 if (sd->entity.num_pads) {
36 fh->pad = v4l2_subdev_alloc_pad_config(sd);
37 if (fh->pad == NULL)
38 return -ENOMEM;
39 }
40#endif
41 return 0;
42}
43
44static void subdev_fh_free(struct v4l2_subdev_fh *fh)
45{
46#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
47 v4l2_subdev_free_pad_config(fh->pad);
48 fh->pad = NULL;
49#endif
50}
51
52static int subdev_open(struct file *file)
53{
54 struct video_device *vdev = video_devdata(file);
55 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
56 struct v4l2_subdev_fh *subdev_fh;
57#if defined(CONFIG_MEDIA_CONTROLLER)
58 struct media_entity *entity = NULL;
59#endif
60 int ret;
61
62 subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
63 if (subdev_fh == NULL)
64 return -ENOMEM;
65
66 ret = subdev_fh_init(subdev_fh, sd);
67 if (ret) {
68 kfree(subdev_fh);
69 return ret;
70 }
71
72 v4l2_fh_init(&subdev_fh->vfh, vdev);
73 v4l2_fh_add(&subdev_fh->vfh);
74 file->private_data = &subdev_fh->vfh;
75#if defined(CONFIG_MEDIA_CONTROLLER)
76 if (sd->v4l2_dev->mdev) {
77 entity = media_entity_get(&sd->entity);
78 if (!entity) {
79 ret = -EBUSY;
80 goto err;
81 }
82 }
83#endif
84
85 if (sd->internal_ops && sd->internal_ops->open) {
86 ret = sd->internal_ops->open(sd, subdev_fh);
87 if (ret < 0)
88 goto err;
89 }
90
91 return 0;
92
93err:
94#if defined(CONFIG_MEDIA_CONTROLLER)
95 media_entity_put(entity);
96#endif
97 v4l2_fh_del(&subdev_fh->vfh);
98 v4l2_fh_exit(&subdev_fh->vfh);
99 subdev_fh_free(subdev_fh);
100 kfree(subdev_fh);
101
102 return ret;
103}
104
105static int subdev_close(struct file *file)
106{
107 struct video_device *vdev = video_devdata(file);
108 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
109 struct v4l2_fh *vfh = file->private_data;
110 struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
111
112 if (sd->internal_ops && sd->internal_ops->close)
113 sd->internal_ops->close(sd, subdev_fh);
114#if defined(CONFIG_MEDIA_CONTROLLER)
115 if (sd->v4l2_dev->mdev)
116 media_entity_put(&sd->entity);
117#endif
118 v4l2_fh_del(vfh);
119 v4l2_fh_exit(vfh);
120 subdev_fh_free(subdev_fh);
121 kfree(subdev_fh);
122 file->private_data = NULL;
123
124 return 0;
125}
126
127#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
128static int check_format(struct v4l2_subdev *sd,
129 struct v4l2_subdev_format *format)
130{
131 if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
132 format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
133 return -EINVAL;
134
135 if (format->pad >= sd->entity.num_pads)
136 return -EINVAL;
137
138 return 0;
139}
140
141static int check_crop(struct v4l2_subdev *sd, struct v4l2_subdev_crop *crop)
142{
143 if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
144 crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
145 return -EINVAL;
146
147 if (crop->pad >= sd->entity.num_pads)
148 return -EINVAL;
149
150 return 0;
151}
152
153static int check_selection(struct v4l2_subdev *sd,
154 struct v4l2_subdev_selection *sel)
155{
156 if (sel->which != V4L2_SUBDEV_FORMAT_TRY &&
157 sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
158 return -EINVAL;
159
160 if (sel->pad >= sd->entity.num_pads)
161 return -EINVAL;
162
163 return 0;
164}
165
166static int check_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
167{
168 if (edid->pad >= sd->entity.num_pads)
169 return -EINVAL;
170
171 if (edid->blocks && edid->edid == NULL)
172 return -EINVAL;
173
174 return 0;
175}
176#endif
177
178static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
179{
180 struct video_device *vdev = video_devdata(file);
181 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
182 struct v4l2_fh *vfh = file->private_data;
183#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
184 struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
185 int rval;
186#endif
187
188 switch (cmd) {
189 case VIDIOC_QUERYCTRL:
190 return v4l2_queryctrl(vfh->ctrl_handler, arg);
191
192 case VIDIOC_QUERY_EXT_CTRL:
193 return v4l2_query_ext_ctrl(vfh->ctrl_handler, arg);
194
195 case VIDIOC_QUERYMENU:
196 return v4l2_querymenu(vfh->ctrl_handler, arg);
197
198 case VIDIOC_G_CTRL:
199 return v4l2_g_ctrl(vfh->ctrl_handler, arg);
200
201 case VIDIOC_S_CTRL:
202 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
203
204 case VIDIOC_G_EXT_CTRLS:
205 return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);
206
207 case VIDIOC_S_EXT_CTRLS:
208 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);
209
210 case VIDIOC_TRY_EXT_CTRLS:
211 return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);
212
213 case VIDIOC_DQEVENT:
214 if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
215 return -ENOIOCTLCMD;
216
217 return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);
218
219 case VIDIOC_SUBSCRIBE_EVENT:
220 return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);
221
222 case VIDIOC_UNSUBSCRIBE_EVENT:
223 return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);
224
225#ifdef CONFIG_VIDEO_ADV_DEBUG
226 case VIDIOC_DBG_G_REGISTER:
227 {
228 struct v4l2_dbg_register *p = arg;
229
230 if (!capable(CAP_SYS_ADMIN))
231 return -EPERM;
232 return v4l2_subdev_call(sd, core, g_register, p);
233 }
234 case VIDIOC_DBG_S_REGISTER:
235 {
236 struct v4l2_dbg_register *p = arg;
237
238 if (!capable(CAP_SYS_ADMIN))
239 return -EPERM;
240 return v4l2_subdev_call(sd, core, s_register, p);
241 }
242#endif
243
244 case VIDIOC_LOG_STATUS: {
245 int ret;
246
247 pr_info("%s: ================= START STATUS =================\n",
248 sd->name);
249 ret = v4l2_subdev_call(sd, core, log_status);
250 pr_info("%s: ================== END STATUS ==================\n",
251 sd->name);
252 return ret;
253 }
254
255#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
256 case VIDIOC_SUBDEV_G_FMT: {
257 struct v4l2_subdev_format *format = arg;
258
259 rval = check_format(sd, format);
260 if (rval)
261 return rval;
262
263 return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh->pad, format);
264 }
265
266 case VIDIOC_SUBDEV_S_FMT: {
267 struct v4l2_subdev_format *format = arg;
268
269 rval = check_format(sd, format);
270 if (rval)
271 return rval;
272
273 return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh->pad, format);
274 }
275
276 case VIDIOC_SUBDEV_G_CROP: {
277 struct v4l2_subdev_crop *crop = arg;
278 struct v4l2_subdev_selection sel;
279
280 rval = check_crop(sd, crop);
281 if (rval)
282 return rval;
283
284 memset(&sel, 0, sizeof(sel));
285 sel.which = crop->which;
286 sel.pad = crop->pad;
287 sel.target = V4L2_SEL_TGT_CROP;
288
289 rval = v4l2_subdev_call(
290 sd, pad, get_selection, subdev_fh->pad, &sel);
291
292 crop->rect = sel.r;
293
294 return rval;
295 }
296
297 case VIDIOC_SUBDEV_S_CROP: {
298 struct v4l2_subdev_crop *crop = arg;
299 struct v4l2_subdev_selection sel;
300
301 rval = check_crop(sd, crop);
302 if (rval)
303 return rval;
304
305 memset(&sel, 0, sizeof(sel));
306 sel.which = crop->which;
307 sel.pad = crop->pad;
308 sel.target = V4L2_SEL_TGT_CROP;
309 sel.r = crop->rect;
310
311 rval = v4l2_subdev_call(
312 sd, pad, set_selection, subdev_fh->pad, &sel);
313
314 crop->rect = sel.r;
315
316 return rval;
317 }
318
319 case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
320 struct v4l2_subdev_mbus_code_enum *code = arg;
321
322 if (code->which != V4L2_SUBDEV_FORMAT_TRY &&
323 code->which != V4L2_SUBDEV_FORMAT_ACTIVE)
324 return -EINVAL;
325
326 if (code->pad >= sd->entity.num_pads)
327 return -EINVAL;
328
329 return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh->pad,
330 code);
331 }
332
333 case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
334 struct v4l2_subdev_frame_size_enum *fse = arg;
335
336 if (fse->which != V4L2_SUBDEV_FORMAT_TRY &&
337 fse->which != V4L2_SUBDEV_FORMAT_ACTIVE)
338 return -EINVAL;
339
340 if (fse->pad >= sd->entity.num_pads)
341 return -EINVAL;
342
343 return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh->pad,
344 fse);
345 }
346
347 case VIDIOC_SUBDEV_G_FRAME_INTERVAL: {
348 struct v4l2_subdev_frame_interval *fi = arg;
349
350 if (fi->pad >= sd->entity.num_pads)
351 return -EINVAL;
352
353 return v4l2_subdev_call(sd, video, g_frame_interval, arg);
354 }
355
356 case VIDIOC_SUBDEV_S_FRAME_INTERVAL: {
357 struct v4l2_subdev_frame_interval *fi = arg;
358
359 if (fi->pad >= sd->entity.num_pads)
360 return -EINVAL;
361
362 return v4l2_subdev_call(sd, video, s_frame_interval, arg);
363 }
364
365 case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
366 struct v4l2_subdev_frame_interval_enum *fie = arg;
367
368 if (fie->which != V4L2_SUBDEV_FORMAT_TRY &&
369 fie->which != V4L2_SUBDEV_FORMAT_ACTIVE)
370 return -EINVAL;
371
372 if (fie->pad >= sd->entity.num_pads)
373 return -EINVAL;
374
375 return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh->pad,
376 fie);
377 }
378
379 case VIDIOC_SUBDEV_G_SELECTION: {
380 struct v4l2_subdev_selection *sel = arg;
381
382 rval = check_selection(sd, sel);
383 if (rval)
384 return rval;
385
386 return v4l2_subdev_call(
387 sd, pad, get_selection, subdev_fh->pad, sel);
388 }
389
390 case VIDIOC_SUBDEV_S_SELECTION: {
391 struct v4l2_subdev_selection *sel = arg;
392
393 rval = check_selection(sd, sel);
394 if (rval)
395 return rval;
396
397 return v4l2_subdev_call(
398 sd, pad, set_selection, subdev_fh->pad, sel);
399 }
400
401 case VIDIOC_G_EDID: {
402 struct v4l2_subdev_edid *edid = arg;
403
404 rval = check_edid(sd, edid);
405 if (rval)
406 return rval;
407
408 return v4l2_subdev_call(sd, pad, get_edid, edid);
409 }
410
411 case VIDIOC_S_EDID: {
412 struct v4l2_subdev_edid *edid = arg;
413
414 rval = check_edid(sd, edid);
415 if (rval)
416 return rval;
417
418 return v4l2_subdev_call(sd, pad, set_edid, edid);
419 }
420
421 case VIDIOC_SUBDEV_DV_TIMINGS_CAP: {
422 struct v4l2_dv_timings_cap *cap = arg;
423
424 if (cap->pad >= sd->entity.num_pads)
425 return -EINVAL;
426
427 return v4l2_subdev_call(sd, pad, dv_timings_cap, cap);
428 }
429
430 case VIDIOC_SUBDEV_ENUM_DV_TIMINGS: {
431 struct v4l2_enum_dv_timings *dvt = arg;
432
433 if (dvt->pad >= sd->entity.num_pads)
434 return -EINVAL;
435
436 return v4l2_subdev_call(sd, pad, enum_dv_timings, dvt);
437 }
438
439 case VIDIOC_SUBDEV_QUERY_DV_TIMINGS:
440 return v4l2_subdev_call(sd, video, query_dv_timings, arg);
441
442 case VIDIOC_SUBDEV_G_DV_TIMINGS:
443 return v4l2_subdev_call(sd, video, g_dv_timings, arg);
444
445 case VIDIOC_SUBDEV_S_DV_TIMINGS:
446 return v4l2_subdev_call(sd, video, s_dv_timings, arg);
447#endif
448 default:
449 return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
450 }
451
452 return 0;
453}
454
455static long subdev_ioctl(struct file *file, unsigned int cmd,
456 unsigned long arg)
457{
458 return video_usercopy(file, cmd, arg, subdev_do_ioctl);
459}
460
461#ifdef CONFIG_COMPAT
462static long subdev_compat_ioctl32(struct file *file, unsigned int cmd,
463 unsigned long arg)
464{
465 struct video_device *vdev = video_devdata(file);
466 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
467
468 return v4l2_subdev_call(sd, core, compat_ioctl32, cmd, arg);
469}
470#endif
471
472static unsigned int subdev_poll(struct file *file, poll_table *wait)
473{
474 struct video_device *vdev = video_devdata(file);
475 struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
476 struct v4l2_fh *fh = file->private_data;
477
478 if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
479 return POLLERR;
480
481 poll_wait(file, &fh->wait, wait);
482
483 if (v4l2_event_pending(fh))
484 return POLLPRI;
485
486 return 0;
487}
488
489const struct v4l2_file_operations v4l2_subdev_fops = {
490 .owner = THIS_MODULE,
491 .open = subdev_open,
492 .unlocked_ioctl = subdev_ioctl,
493#ifdef CONFIG_COMPAT
494 .compat_ioctl32 = subdev_compat_ioctl32,
495#endif
496 .release = subdev_close,
497 .poll = subdev_poll,
498};
499
500#ifdef CONFIG_MEDIA_CONTROLLER
501int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
502 struct media_link *link,
503 struct v4l2_subdev_format *source_fmt,
504 struct v4l2_subdev_format *sink_fmt)
505{
506
507 if (source_fmt->format.width != sink_fmt->format.width
508 || source_fmt->format.height != sink_fmt->format.height
509 || source_fmt->format.code != sink_fmt->format.code)
510 return -EPIPE;
511
512
513
514
515
516 if (source_fmt->format.field != sink_fmt->format.field &&
517 sink_fmt->format.field != V4L2_FIELD_NONE)
518 return -EPIPE;
519
520 return 0;
521}
522EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate_default);
523
524static int
525v4l2_subdev_link_validate_get_format(struct media_pad *pad,
526 struct v4l2_subdev_format *fmt)
527{
528 if (is_media_entity_v4l2_subdev(pad->entity)) {
529 struct v4l2_subdev *sd =
530 media_entity_to_v4l2_subdev(pad->entity);
531
532 fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
533 fmt->pad = pad->index;
534 return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
535 }
536
537 WARN(pad->entity->function != MEDIA_ENT_F_IO_V4L,
538 "Driver bug! Wrong media entity type 0x%08x, entity %s\n",
539 pad->entity->function, pad->entity->name);
540
541 return -EINVAL;
542}
543
544int v4l2_subdev_link_validate(struct media_link *link)
545{
546 struct v4l2_subdev *sink;
547 struct v4l2_subdev_format sink_fmt, source_fmt;
548 int rval;
549
550 rval = v4l2_subdev_link_validate_get_format(
551 link->source, &source_fmt);
552 if (rval < 0)
553 return 0;
554
555 rval = v4l2_subdev_link_validate_get_format(
556 link->sink, &sink_fmt);
557 if (rval < 0)
558 return 0;
559
560 sink = media_entity_to_v4l2_subdev(link->sink->entity);
561
562 rval = v4l2_subdev_call(sink, pad, link_validate, link,
563 &source_fmt, &sink_fmt);
564 if (rval != -ENOIOCTLCMD)
565 return rval;
566
567 return v4l2_subdev_link_validate_default(
568 sink, link, &source_fmt, &sink_fmt);
569}
570EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);
571
572struct v4l2_subdev_pad_config *
573v4l2_subdev_alloc_pad_config(struct v4l2_subdev *sd)
574{
575 struct v4l2_subdev_pad_config *cfg;
576 int ret;
577
578 if (!sd->entity.num_pads)
579 return NULL;
580
581 cfg = kvmalloc_array(sd->entity.num_pads, sizeof(*cfg),
582 GFP_KERNEL | __GFP_ZERO);
583 if (!cfg)
584 return NULL;
585
586 ret = v4l2_subdev_call(sd, pad, init_cfg, cfg);
587 if (ret < 0 && ret != -ENOIOCTLCMD) {
588 kvfree(cfg);
589 return NULL;
590 }
591
592 return cfg;
593}
594EXPORT_SYMBOL_GPL(v4l2_subdev_alloc_pad_config);
595
596void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config *cfg)
597{
598 kvfree(cfg);
599}
600EXPORT_SYMBOL_GPL(v4l2_subdev_free_pad_config);
601#endif
602
603void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops)
604{
605 INIT_LIST_HEAD(&sd->list);
606 BUG_ON(!ops);
607 sd->ops = ops;
608 sd->v4l2_dev = NULL;
609 sd->flags = 0;
610 sd->name[0] = '\0';
611 sd->grp_id = 0;
612 sd->dev_priv = NULL;
613 sd->host_priv = NULL;
614#if defined(CONFIG_MEDIA_CONTROLLER)
615 sd->entity.name = sd->name;
616 sd->entity.obj_type = MEDIA_ENTITY_TYPE_V4L2_SUBDEV;
617 sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
618#endif
619}
620EXPORT_SYMBOL(v4l2_subdev_init);
621
622void v4l2_subdev_notify_event(struct v4l2_subdev *sd,
623 const struct v4l2_event *ev)
624{
625 v4l2_event_queue(sd->devnode, ev);
626 v4l2_subdev_notify(sd, V4L2_DEVICE_NOTIFY_EVENT, (void *)ev);
627}
628EXPORT_SYMBOL_GPL(v4l2_subdev_notify_event);
629
