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11#include <linux/compat.h>
12#include <linux/export.h>
13#include <linux/idr.h>
14#include <linux/ioctl.h>
15#include <linux/media.h>
16#include <linux/slab.h>
17#include <linux/types.h>
18#include <linux/pci.h>
19#include <linux/usb.h>
20#include <linux/version.h>
21
22#include <media/media-device.h>
23#include <media/media-devnode.h>
24#include <media/media-entity.h>
25#include <media/media-request.h>
26
27#ifdef CONFIG_MEDIA_CONTROLLER
28
29
30
31
32
33
34
35#define MEDIA_ENT_SUBTYPE_MASK 0x0000ffff
36#define MEDIA_ENT_T_DEVNODE_UNKNOWN (MEDIA_ENT_F_OLD_BASE | \
37 MEDIA_ENT_SUBTYPE_MASK)
38
39
40
41
42
43static inline void __user *media_get_uptr(__u64 arg)
44{
45 return (void __user *)(uintptr_t)arg;
46}
47
48static int media_device_open(struct file *filp)
49{
50 return 0;
51}
52
53static int media_device_close(struct file *filp)
54{
55 return 0;
56}
57
58static long media_device_get_info(struct media_device *dev, void *arg)
59{
60 struct media_device_info *info = arg;
61
62 memset(info, 0, sizeof(*info));
63
64 if (dev->driver_name[0])
65 strscpy(info->driver, dev->driver_name, sizeof(info->driver));
66 else
67 strscpy(info->driver, dev->dev->driver->name,
68 sizeof(info->driver));
69
70 strscpy(info->model, dev->model, sizeof(info->model));
71 strscpy(info->serial, dev->serial, sizeof(info->serial));
72 strscpy(info->bus_info, dev->bus_info, sizeof(info->bus_info));
73
74 info->media_version = LINUX_VERSION_CODE;
75 info->driver_version = info->media_version;
76 info->hw_revision = dev->hw_revision;
77
78 return 0;
79}
80
81static struct media_entity *find_entity(struct media_device *mdev, u32 id)
82{
83 struct media_entity *entity;
84 int next = id & MEDIA_ENT_ID_FLAG_NEXT;
85
86 id &= ~MEDIA_ENT_ID_FLAG_NEXT;
87
88 media_device_for_each_entity(entity, mdev) {
89 if (((media_entity_id(entity) == id) && !next) ||
90 ((media_entity_id(entity) > id) && next)) {
91 return entity;
92 }
93 }
94
95 return NULL;
96}
97
98static long media_device_enum_entities(struct media_device *mdev, void *arg)
99{
100 struct media_entity_desc *entd = arg;
101 struct media_entity *ent;
102
103 ent = find_entity(mdev, entd->id);
104 if (ent == NULL)
105 return -EINVAL;
106
107 memset(entd, 0, sizeof(*entd));
108
109 entd->id = media_entity_id(ent);
110 if (ent->name)
111 strscpy(entd->name, ent->name, sizeof(entd->name));
112 entd->type = ent->function;
113 entd->revision = 0;
114 entd->flags = ent->flags;
115 entd->group_id = 0;
116 entd->pads = ent->num_pads;
117 entd->links = ent->num_links - ent->num_backlinks;
118
119
120
121
122
123
124
125
126
127
128
129
130 if (ent->function < MEDIA_ENT_F_OLD_BASE ||
131 ent->function > MEDIA_ENT_F_TUNER) {
132 if (is_media_entity_v4l2_subdev(ent))
133 entd->type = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
134 else if (ent->function != MEDIA_ENT_F_IO_V4L)
135 entd->type = MEDIA_ENT_T_DEVNODE_UNKNOWN;
136 }
137
138 memcpy(&entd->raw, &ent->info, sizeof(ent->info));
139
140 return 0;
141}
142
143static void media_device_kpad_to_upad(const struct media_pad *kpad,
144 struct media_pad_desc *upad)
145{
146 upad->entity = media_entity_id(kpad->entity);
147 upad->index = kpad->index;
148 upad->flags = kpad->flags;
149}
150
151static long media_device_enum_links(struct media_device *mdev, void *arg)
152{
153 struct media_links_enum *links = arg;
154 struct media_entity *entity;
155
156 entity = find_entity(mdev, links->entity);
157 if (entity == NULL)
158 return -EINVAL;
159
160 if (links->pads) {
161 unsigned int p;
162
163 for (p = 0; p < entity->num_pads; p++) {
164 struct media_pad_desc pad;
165
166 memset(&pad, 0, sizeof(pad));
167 media_device_kpad_to_upad(&entity->pads[p], &pad);
168 if (copy_to_user(&links->pads[p], &pad, sizeof(pad)))
169 return -EFAULT;
170 }
171 }
172
173 if (links->links) {
174 struct media_link *link;
175 struct media_link_desc __user *ulink_desc = links->links;
176
177 list_for_each_entry(link, &entity->links, list) {
178 struct media_link_desc klink_desc;
179
180
181 if (link->source->entity != entity)
182 continue;
183 memset(&klink_desc, 0, sizeof(klink_desc));
184 media_device_kpad_to_upad(link->source,
185 &klink_desc.source);
186 media_device_kpad_to_upad(link->sink,
187 &klink_desc.sink);
188 klink_desc.flags = link->flags;
189 if (copy_to_user(ulink_desc, &klink_desc,
190 sizeof(*ulink_desc)))
191 return -EFAULT;
192 ulink_desc++;
193 }
194 }
195 memset(links->reserved, 0, sizeof(links->reserved));
196
197 return 0;
198}
199
200static long media_device_setup_link(struct media_device *mdev, void *arg)
201{
202 struct media_link_desc *linkd = arg;
203 struct media_link *link = NULL;
204 struct media_entity *source;
205 struct media_entity *sink;
206
207
208
209 source = find_entity(mdev, linkd->source.entity);
210 sink = find_entity(mdev, linkd->sink.entity);
211
212 if (source == NULL || sink == NULL)
213 return -EINVAL;
214
215 if (linkd->source.index >= source->num_pads ||
216 linkd->sink.index >= sink->num_pads)
217 return -EINVAL;
218
219 link = media_entity_find_link(&source->pads[linkd->source.index],
220 &sink->pads[linkd->sink.index]);
221 if (link == NULL)
222 return -EINVAL;
223
224 memset(linkd->reserved, 0, sizeof(linkd->reserved));
225
226
227 return __media_entity_setup_link(link, linkd->flags);
228}
229
230static long media_device_get_topology(struct media_device *mdev, void *arg)
231{
232 struct media_v2_topology *topo = arg;
233 struct media_entity *entity;
234 struct media_interface *intf;
235 struct media_pad *pad;
236 struct media_link *link;
237 struct media_v2_entity kentity, __user *uentity;
238 struct media_v2_interface kintf, __user *uintf;
239 struct media_v2_pad kpad, __user *upad;
240 struct media_v2_link klink, __user *ulink;
241 unsigned int i;
242 int ret = 0;
243
244 topo->topology_version = mdev->topology_version;
245
246
247 i = 0;
248 uentity = media_get_uptr(topo->ptr_entities);
249 media_device_for_each_entity(entity, mdev) {
250 i++;
251 if (ret || !uentity)
252 continue;
253
254 if (i > topo->num_entities) {
255 ret = -ENOSPC;
256 continue;
257 }
258
259
260 memset(&kentity, 0, sizeof(kentity));
261 kentity.id = entity->graph_obj.id;
262 kentity.function = entity->function;
263 kentity.flags = entity->flags;
264 strscpy(kentity.name, entity->name,
265 sizeof(kentity.name));
266
267 if (copy_to_user(uentity, &kentity, sizeof(kentity)))
268 ret = -EFAULT;
269 uentity++;
270 }
271 topo->num_entities = i;
272 topo->reserved1 = 0;
273
274
275 i = 0;
276 uintf = media_get_uptr(topo->ptr_interfaces);
277 media_device_for_each_intf(intf, mdev) {
278 i++;
279 if (ret || !uintf)
280 continue;
281
282 if (i > topo->num_interfaces) {
283 ret = -ENOSPC;
284 continue;
285 }
286
287 memset(&kintf, 0, sizeof(kintf));
288
289
290 kintf.id = intf->graph_obj.id;
291 kintf.intf_type = intf->type;
292 kintf.flags = intf->flags;
293
294 if (media_type(&intf->graph_obj) == MEDIA_GRAPH_INTF_DEVNODE) {
295 struct media_intf_devnode *devnode;
296
297 devnode = intf_to_devnode(intf);
298
299 kintf.devnode.major = devnode->major;
300 kintf.devnode.minor = devnode->minor;
301 }
302
303 if (copy_to_user(uintf, &kintf, sizeof(kintf)))
304 ret = -EFAULT;
305 uintf++;
306 }
307 topo->num_interfaces = i;
308 topo->reserved2 = 0;
309
310
311 i = 0;
312 upad = media_get_uptr(topo->ptr_pads);
313 media_device_for_each_pad(pad, mdev) {
314 i++;
315 if (ret || !upad)
316 continue;
317
318 if (i > topo->num_pads) {
319 ret = -ENOSPC;
320 continue;
321 }
322
323 memset(&kpad, 0, sizeof(kpad));
324
325
326 kpad.id = pad->graph_obj.id;
327 kpad.entity_id = pad->entity->graph_obj.id;
328 kpad.flags = pad->flags;
329 kpad.index = pad->index;
330
331 if (copy_to_user(upad, &kpad, sizeof(kpad)))
332 ret = -EFAULT;
333 upad++;
334 }
335 topo->num_pads = i;
336 topo->reserved3 = 0;
337
338
339 i = 0;
340 ulink = media_get_uptr(topo->ptr_links);
341 media_device_for_each_link(link, mdev) {
342 if (link->is_backlink)
343 continue;
344
345 i++;
346
347 if (ret || !ulink)
348 continue;
349
350 if (i > topo->num_links) {
351 ret = -ENOSPC;
352 continue;
353 }
354
355 memset(&klink, 0, sizeof(klink));
356
357
358 klink.id = link->graph_obj.id;
359 klink.source_id = link->gobj0->id;
360 klink.sink_id = link->gobj1->id;
361 klink.flags = link->flags;
362
363 if (copy_to_user(ulink, &klink, sizeof(klink)))
364 ret = -EFAULT;
365 ulink++;
366 }
367 topo->num_links = i;
368 topo->reserved4 = 0;
369
370 return ret;
371}
372
373static long media_device_request_alloc(struct media_device *mdev, void *arg)
374{
375#ifdef CONFIG_MEDIA_CONTROLLER_REQUEST_API
376 int *alloc_fd = arg;
377
378 if (!mdev->ops || !mdev->ops->req_validate || !mdev->ops->req_queue)
379 return -ENOTTY;
380
381 return media_request_alloc(mdev, alloc_fd);
382#else
383 return -ENOTTY;
384#endif
385}
386
387static long copy_arg_from_user(void *karg, void __user *uarg, unsigned int cmd)
388{
389 if ((_IOC_DIR(cmd) & _IOC_WRITE) &&
390 copy_from_user(karg, uarg, _IOC_SIZE(cmd)))
391 return -EFAULT;
392
393 return 0;
394}
395
396static long copy_arg_to_user(void __user *uarg, void *karg, unsigned int cmd)
397{
398 if ((_IOC_DIR(cmd) & _IOC_READ) &&
399 copy_to_user(uarg, karg, _IOC_SIZE(cmd)))
400 return -EFAULT;
401
402 return 0;
403}
404
405
406#define MEDIA_IOC_FL_GRAPH_MUTEX BIT(0)
407
408#define MEDIA_IOC_ARG(__cmd, func, fl, from_user, to_user) \
409 [_IOC_NR(MEDIA_IOC_##__cmd)] = { \
410 .cmd = MEDIA_IOC_##__cmd, \
411 .fn = func, \
412 .flags = fl, \
413 .arg_from_user = from_user, \
414 .arg_to_user = to_user, \
415 }
416
417#define MEDIA_IOC(__cmd, func, fl) \
418 MEDIA_IOC_ARG(__cmd, func, fl, copy_arg_from_user, copy_arg_to_user)
419
420
421struct media_ioctl_info {
422 unsigned int cmd;
423 unsigned short flags;
424 long (*fn)(struct media_device *dev, void *arg);
425 long (*arg_from_user)(void *karg, void __user *uarg, unsigned int cmd);
426 long (*arg_to_user)(void __user *uarg, void *karg, unsigned int cmd);
427};
428
429static const struct media_ioctl_info ioctl_info[] = {
430 MEDIA_IOC(DEVICE_INFO, media_device_get_info, MEDIA_IOC_FL_GRAPH_MUTEX),
431 MEDIA_IOC(ENUM_ENTITIES, media_device_enum_entities, MEDIA_IOC_FL_GRAPH_MUTEX),
432 MEDIA_IOC(ENUM_LINKS, media_device_enum_links, MEDIA_IOC_FL_GRAPH_MUTEX),
433 MEDIA_IOC(SETUP_LINK, media_device_setup_link, MEDIA_IOC_FL_GRAPH_MUTEX),
434 MEDIA_IOC(G_TOPOLOGY, media_device_get_topology, MEDIA_IOC_FL_GRAPH_MUTEX),
435 MEDIA_IOC(REQUEST_ALLOC, media_device_request_alloc, 0),
436};
437
438static long media_device_ioctl(struct file *filp, unsigned int cmd,
439 unsigned long __arg)
440{
441 struct media_devnode *devnode = media_devnode_data(filp);
442 struct media_device *dev = devnode->media_dev;
443 const struct media_ioctl_info *info;
444 void __user *arg = (void __user *)__arg;
445 char __karg[256], *karg = __karg;
446 long ret;
447
448 if (_IOC_NR(cmd) >= ARRAY_SIZE(ioctl_info)
449 || ioctl_info[_IOC_NR(cmd)].cmd != cmd)
450 return -ENOIOCTLCMD;
451
452 info = &ioctl_info[_IOC_NR(cmd)];
453
454 if (_IOC_SIZE(info->cmd) > sizeof(__karg)) {
455 karg = kmalloc(_IOC_SIZE(info->cmd), GFP_KERNEL);
456 if (!karg)
457 return -ENOMEM;
458 }
459
460 if (info->arg_from_user) {
461 ret = info->arg_from_user(karg, arg, cmd);
462 if (ret)
463 goto out_free;
464 }
465
466 if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX)
467 mutex_lock(&dev->graph_mutex);
468
469 ret = info->fn(dev, karg);
470
471 if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX)
472 mutex_unlock(&dev->graph_mutex);
473
474 if (!ret && info->arg_to_user)
475 ret = info->arg_to_user(arg, karg, cmd);
476
477out_free:
478 if (karg != __karg)
479 kfree(karg);
480
481 return ret;
482}
483
484#ifdef CONFIG_COMPAT
485
486struct media_links_enum32 {
487 __u32 entity;
488 compat_uptr_t pads;
489 compat_uptr_t links;
490 __u32 reserved[4];
491};
492
493static long media_device_enum_links32(struct media_device *mdev,
494 struct media_links_enum32 __user *ulinks)
495{
496 struct media_links_enum links;
497 compat_uptr_t pads_ptr, links_ptr;
498 int ret;
499
500 memset(&links, 0, sizeof(links));
501
502 if (get_user(links.entity, &ulinks->entity)
503 || get_user(pads_ptr, &ulinks->pads)
504 || get_user(links_ptr, &ulinks->links))
505 return -EFAULT;
506
507 links.pads = compat_ptr(pads_ptr);
508 links.links = compat_ptr(links_ptr);
509
510 ret = media_device_enum_links(mdev, &links);
511 if (ret)
512 return ret;
513
514 if (copy_to_user(ulinks->reserved, links.reserved,
515 sizeof(ulinks->reserved)))
516 return -EFAULT;
517 return 0;
518}
519
520#define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32)
521
522static long media_device_compat_ioctl(struct file *filp, unsigned int cmd,
523 unsigned long arg)
524{
525 struct media_devnode *devnode = media_devnode_data(filp);
526 struct media_device *dev = devnode->media_dev;
527 long ret;
528
529 switch (cmd) {
530 case MEDIA_IOC_ENUM_LINKS32:
531 mutex_lock(&dev->graph_mutex);
532 ret = media_device_enum_links32(dev,
533 (struct media_links_enum32 __user *)arg);
534 mutex_unlock(&dev->graph_mutex);
535 break;
536
537 default:
538 return media_device_ioctl(filp, cmd, arg);
539 }
540
541 return ret;
542}
543#endif
544
545static const struct media_file_operations media_device_fops = {
546 .owner = THIS_MODULE,
547 .open = media_device_open,
548 .ioctl = media_device_ioctl,
549#ifdef CONFIG_COMPAT
550 .compat_ioctl = media_device_compat_ioctl,
551#endif
552 .release = media_device_close,
553};
554
555
556
557
558
559static ssize_t model_show(struct device *cd,
560 struct device_attribute *attr, char *buf)
561{
562 struct media_devnode *devnode = to_media_devnode(cd);
563 struct media_device *mdev = devnode->media_dev;
564
565 return sprintf(buf, "%.*s\n", (int)sizeof(mdev->model), mdev->model);
566}
567
568static DEVICE_ATTR_RO(model);
569
570
571
572
573
574static void media_device_release(struct media_devnode *devnode)
575{
576 dev_dbg(devnode->parent, "Media device released\n");
577}
578
579static void __media_device_unregister_entity(struct media_entity *entity)
580{
581 struct media_device *mdev = entity->graph_obj.mdev;
582 struct media_link *link, *tmp;
583 struct media_interface *intf;
584 unsigned int i;
585
586 ida_free(&mdev->entity_internal_idx, entity->internal_idx);
587
588
589 list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) {
590 list_for_each_entry_safe(link, tmp, &intf->links, list) {
591 if (link->entity == entity)
592 __media_remove_intf_link(link);
593 }
594 }
595
596
597 __media_entity_remove_links(entity);
598
599
600 for (i = 0; i < entity->num_pads; i++)
601 media_gobj_destroy(&entity->pads[i].graph_obj);
602
603
604 media_gobj_destroy(&entity->graph_obj);
605
606
607
608 entity->graph_obj.mdev = NULL;
609}
610
611
612
613
614
615
616int __must_check media_device_register_entity(struct media_device *mdev,
617 struct media_entity *entity)
618{
619 struct media_entity_notify *notify, *next;
620 unsigned int i;
621 int ret;
622
623 if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN ||
624 entity->function == MEDIA_ENT_F_UNKNOWN)
625 dev_warn(mdev->dev,
626 "Entity type for entity %s was not initialized!\n",
627 entity->name);
628
629
630 WARN_ON(entity->graph_obj.mdev != NULL);
631 entity->graph_obj.mdev = mdev;
632 INIT_LIST_HEAD(&entity->links);
633 entity->num_links = 0;
634 entity->num_backlinks = 0;
635
636 ret = ida_alloc_min(&mdev->entity_internal_idx, 1, GFP_KERNEL);
637 if (ret < 0)
638 return ret;
639 entity->internal_idx = ret;
640
641 mutex_lock(&mdev->graph_mutex);
642 mdev->entity_internal_idx_max =
643 max(mdev->entity_internal_idx_max, entity->internal_idx);
644
645
646 media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj);
647
648
649 for (i = 0; i < entity->num_pads; i++)
650 media_gobj_create(mdev, MEDIA_GRAPH_PAD,
651 &entity->pads[i].graph_obj);
652
653
654 list_for_each_entry_safe(notify, next, &mdev->entity_notify, list)
655 notify->notify(entity, notify->notify_data);
656
657 if (mdev->entity_internal_idx_max
658 >= mdev->pm_count_walk.ent_enum.idx_max) {
659 struct media_graph new = { .top = 0 };
660
661
662
663
664
665
666 ret = media_graph_walk_init(&new, mdev);
667 if (ret) {
668 __media_device_unregister_entity(entity);
669 mutex_unlock(&mdev->graph_mutex);
670 return ret;
671 }
672 media_graph_walk_cleanup(&mdev->pm_count_walk);
673 mdev->pm_count_walk = new;
674 }
675 mutex_unlock(&mdev->graph_mutex);
676
677 return 0;
678}
679EXPORT_SYMBOL_GPL(media_device_register_entity);
680
681void media_device_unregister_entity(struct media_entity *entity)
682{
683 struct media_device *mdev = entity->graph_obj.mdev;
684
685 if (mdev == NULL)
686 return;
687
688 mutex_lock(&mdev->graph_mutex);
689 __media_device_unregister_entity(entity);
690 mutex_unlock(&mdev->graph_mutex);
691}
692EXPORT_SYMBOL_GPL(media_device_unregister_entity);
693
694
695
696
697
698
699
700
701
702
703
704void media_device_init(struct media_device *mdev)
705{
706 INIT_LIST_HEAD(&mdev->entities);
707 INIT_LIST_HEAD(&mdev->interfaces);
708 INIT_LIST_HEAD(&mdev->pads);
709 INIT_LIST_HEAD(&mdev->links);
710 INIT_LIST_HEAD(&mdev->entity_notify);
711
712 mutex_init(&mdev->req_queue_mutex);
713 mutex_init(&mdev->graph_mutex);
714 ida_init(&mdev->entity_internal_idx);
715
716 atomic_set(&mdev->request_id, 0);
717
718 dev_dbg(mdev->dev, "Media device initialized\n");
719}
720EXPORT_SYMBOL_GPL(media_device_init);
721
722void media_device_cleanup(struct media_device *mdev)
723{
724 ida_destroy(&mdev->entity_internal_idx);
725 mdev->entity_internal_idx_max = 0;
726 media_graph_walk_cleanup(&mdev->pm_count_walk);
727 mutex_destroy(&mdev->graph_mutex);
728 mutex_destroy(&mdev->req_queue_mutex);
729}
730EXPORT_SYMBOL_GPL(media_device_cleanup);
731
732int __must_check __media_device_register(struct media_device *mdev,
733 struct module *owner)
734{
735 struct media_devnode *devnode;
736 int ret;
737
738 devnode = kzalloc(sizeof(*devnode), GFP_KERNEL);
739 if (!devnode)
740 return -ENOMEM;
741
742
743 mdev->devnode = devnode;
744 devnode->fops = &media_device_fops;
745 devnode->parent = mdev->dev;
746 devnode->release = media_device_release;
747
748
749 mdev->topology_version = 0;
750
751 ret = media_devnode_register(mdev, devnode, owner);
752 if (ret < 0) {
753
754 mdev->devnode = NULL;
755 return ret;
756 }
757
758 ret = device_create_file(&devnode->dev, &dev_attr_model);
759 if (ret < 0) {
760
761 mdev->devnode = NULL;
762 media_devnode_unregister_prepare(devnode);
763 media_devnode_unregister(devnode);
764 return ret;
765 }
766
767 dev_dbg(mdev->dev, "Media device registered\n");
768
769 return 0;
770}
771EXPORT_SYMBOL_GPL(__media_device_register);
772
773int __must_check media_device_register_entity_notify(struct media_device *mdev,
774 struct media_entity_notify *nptr)
775{
776 mutex_lock(&mdev->graph_mutex);
777 list_add_tail(&nptr->list, &mdev->entity_notify);
778 mutex_unlock(&mdev->graph_mutex);
779 return 0;
780}
781EXPORT_SYMBOL_GPL(media_device_register_entity_notify);
782
783
784
785
786static void __media_device_unregister_entity_notify(struct media_device *mdev,
787 struct media_entity_notify *nptr)
788{
789 list_del(&nptr->list);
790}
791
792void media_device_unregister_entity_notify(struct media_device *mdev,
793 struct media_entity_notify *nptr)
794{
795 mutex_lock(&mdev->graph_mutex);
796 __media_device_unregister_entity_notify(mdev, nptr);
797 mutex_unlock(&mdev->graph_mutex);
798}
799EXPORT_SYMBOL_GPL(media_device_unregister_entity_notify);
800
801void media_device_unregister(struct media_device *mdev)
802{
803 struct media_entity *entity;
804 struct media_entity *next;
805 struct media_interface *intf, *tmp_intf;
806 struct media_entity_notify *notify, *nextp;
807
808 if (mdev == NULL)
809 return;
810
811 mutex_lock(&mdev->graph_mutex);
812
813
814 if (!media_devnode_is_registered(mdev->devnode)) {
815 mutex_unlock(&mdev->graph_mutex);
816 return;
817 }
818
819
820 media_devnode_unregister_prepare(mdev->devnode);
821
822
823 list_for_each_entry_safe(entity, next, &mdev->entities, graph_obj.list)
824 __media_device_unregister_entity(entity);
825
826
827 list_for_each_entry_safe(notify, nextp, &mdev->entity_notify, list)
828 __media_device_unregister_entity_notify(mdev, notify);
829
830
831 list_for_each_entry_safe(intf, tmp_intf, &mdev->interfaces,
832 graph_obj.list) {
833
834
835
836
837
838 __media_remove_intf_links(intf);
839 media_gobj_destroy(&intf->graph_obj);
840 }
841
842 mutex_unlock(&mdev->graph_mutex);
843
844 dev_dbg(mdev->dev, "Media device unregistered\n");
845
846 device_remove_file(&mdev->devnode->dev, &dev_attr_model);
847 media_devnode_unregister(mdev->devnode);
848
849 mdev->devnode = NULL;
850}
851EXPORT_SYMBOL_GPL(media_device_unregister);
852
853#if IS_ENABLED(CONFIG_PCI)
854void media_device_pci_init(struct media_device *mdev,
855 struct pci_dev *pci_dev,
856 const char *name)
857{
858 mdev->dev = &pci_dev->dev;
859
860 if (name)
861 strscpy(mdev->model, name, sizeof(mdev->model));
862 else
863 strscpy(mdev->model, pci_name(pci_dev), sizeof(mdev->model));
864
865 sprintf(mdev->bus_info, "PCI:%s", pci_name(pci_dev));
866
867 mdev->hw_revision = (pci_dev->subsystem_vendor << 16)
868 | pci_dev->subsystem_device;
869
870 media_device_init(mdev);
871}
872EXPORT_SYMBOL_GPL(media_device_pci_init);
873#endif
874
875#if IS_ENABLED(CONFIG_USB)
876void __media_device_usb_init(struct media_device *mdev,
877 struct usb_device *udev,
878 const char *board_name,
879 const char *driver_name)
880{
881 mdev->dev = &udev->dev;
882
883 if (driver_name)
884 strscpy(mdev->driver_name, driver_name,
885 sizeof(mdev->driver_name));
886
887 if (board_name)
888 strscpy(mdev->model, board_name, sizeof(mdev->model));
889 else if (udev->product)
890 strscpy(mdev->model, udev->product, sizeof(mdev->model));
891 else
892 strscpy(mdev->model, "unknown model", sizeof(mdev->model));
893 if (udev->serial)
894 strscpy(mdev->serial, udev->serial, sizeof(mdev->serial));
895 usb_make_path(udev, mdev->bus_info, sizeof(mdev->bus_info));
896 mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
897
898 media_device_init(mdev);
899}
900EXPORT_SYMBOL_GPL(__media_device_usb_init);
901#endif
902
903
904#endif
905
