4 * Copyright (C) 2010 Nokia Corporation
6 * Contacts: 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.
19 #include <linux/compat.h>
20 #include <linux/export.h>
21 #include <linux/idr.h>
22 #include <linux/ioctl.h>
23 #include <linux/media.h>
24 #include <linux/slab.h>
25 #include <linux/types.h>
26 #include <linux/pci.h>
27 #include <linux/usb.h>
28 #include <linux/version.h>
30 #include <media/media-device.h>
31 #include <media/media-devnode.h>
32 #include <media/media-entity.h>
33 #include <media/media-request.h>
35 #ifdef CONFIG_MEDIA_CONTROLLER
38 * Legacy defines from linux/media.h. This is the only place we need this
39 * so we just define it here. The media.h header doesn't expose it to the
40 * kernel to prevent it from being used by drivers, but here (and only here!)
41 * we need it to handle the legacy behavior.
43 #define MEDIA_ENT_SUBTYPE_MASK 0x0000ffff
44 #define MEDIA_ENT_T_DEVNODE_UNKNOWN (MEDIA_ENT_F_OLD_BASE | \
45 MEDIA_ENT_SUBTYPE_MASK)
47 /* -----------------------------------------------------------------------------
51 static inline void __user *media_get_uptr(__u64 arg)
53 return (void __user *)(uintptr_t)arg;
56 static int media_device_open(struct file *filp)
61 static int media_device_close(struct file *filp)
66 static long media_device_get_info(struct media_device *dev, void *arg)
68 struct media_device_info *info = arg;
70 memset(info, 0, sizeof(*info));
72 if (dev->driver_name[0])
73 strscpy(info->driver, dev->driver_name, sizeof(info->driver));
75 strscpy(info->driver, dev->dev->driver->name,
76 sizeof(info->driver));
78 strscpy(info->model, dev->model, sizeof(info->model));
79 strscpy(info->serial, dev->serial, sizeof(info->serial));
80 strscpy(info->bus_info, dev->bus_info, sizeof(info->bus_info));
82 info->media_version = LINUX_VERSION_CODE;
83 info->driver_version = info->media_version;
84 info->hw_revision = dev->hw_revision;
89 static struct media_entity *find_entity(struct media_device *mdev, u32 id)
91 struct media_entity *entity;
92 int next = id & MEDIA_ENT_ID_FLAG_NEXT;
94 id &= ~MEDIA_ENT_ID_FLAG_NEXT;
96 media_device_for_each_entity(entity, mdev) {
97 if (((media_entity_id(entity) == id) && !next) ||
98 ((media_entity_id(entity) > id) && next)) {
106 static long media_device_enum_entities(struct media_device *mdev, void *arg)
108 struct media_entity_desc *entd = arg;
109 struct media_entity *ent;
111 ent = find_entity(mdev, entd->id);
115 memset(entd, 0, sizeof(*entd));
117 entd->id = media_entity_id(ent);
119 strscpy(entd->name, ent->name, sizeof(entd->name));
120 entd->type = ent->function;
121 entd->revision = 0; /* Unused */
122 entd->flags = ent->flags;
123 entd->group_id = 0; /* Unused */
124 entd->pads = ent->num_pads;
125 entd->links = ent->num_links - ent->num_backlinks;
128 * Workaround for a bug at media-ctl <= v1.10 that makes it to
129 * do the wrong thing if the entity function doesn't belong to
130 * either MEDIA_ENT_F_OLD_BASE or MEDIA_ENT_F_OLD_SUBDEV_BASE
133 * Non-subdevices are expected to be at the MEDIA_ENT_F_OLD_BASE,
134 * or, otherwise, will be silently ignored by media-ctl when
135 * printing the graphviz diagram. So, map them into the devnode
138 if (ent->function < MEDIA_ENT_F_OLD_BASE ||
139 ent->function > MEDIA_ENT_F_TUNER) {
140 if (is_media_entity_v4l2_subdev(ent))
141 entd->type = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
142 else if (ent->function != MEDIA_ENT_F_IO_V4L)
143 entd->type = MEDIA_ENT_T_DEVNODE_UNKNOWN;
146 memcpy(&entd->raw, &ent->info, sizeof(ent->info));
151 static void media_device_kpad_to_upad(const struct media_pad *kpad,
152 struct media_pad_desc *upad)
154 upad->entity = media_entity_id(kpad->entity);
155 upad->index = kpad->index;
156 upad->flags = kpad->flags;
159 static long media_device_enum_links(struct media_device *mdev, void *arg)
161 struct media_links_enum *links = arg;
162 struct media_entity *entity;
164 entity = find_entity(mdev, links->entity);
171 for (p = 0; p < entity->num_pads; p++) {
172 struct media_pad_desc pad;
174 memset(&pad, 0, sizeof(pad));
175 media_device_kpad_to_upad(&entity->pads[p], &pad);
176 if (copy_to_user(&links->pads[p], &pad, sizeof(pad)))
182 struct media_link *link;
183 struct media_link_desc __user *ulink_desc = links->links;
185 list_for_each_entry(link, &entity->links, list) {
186 struct media_link_desc klink_desc;
188 /* Ignore backlinks. */
189 if (link->source->entity != entity)
191 memset(&klink_desc, 0, sizeof(klink_desc));
192 media_device_kpad_to_upad(link->source,
194 media_device_kpad_to_upad(link->sink,
196 klink_desc.flags = link->flags;
197 if (copy_to_user(ulink_desc, &klink_desc,
198 sizeof(*ulink_desc)))
203 memset(links->reserved, 0, sizeof(links->reserved));
208 static long media_device_setup_link(struct media_device *mdev, void *arg)
210 struct media_link_desc *linkd = arg;
211 struct media_link *link = NULL;
212 struct media_entity *source;
213 struct media_entity *sink;
215 /* Find the source and sink entities and link.
217 source = find_entity(mdev, linkd->source.entity);
218 sink = find_entity(mdev, linkd->sink.entity);
220 if (source == NULL || sink == NULL)
223 if (linkd->source.index >= source->num_pads ||
224 linkd->sink.index >= sink->num_pads)
227 link = media_entity_find_link(&source->pads[linkd->source.index],
228 &sink->pads[linkd->sink.index]);
232 memset(linkd->reserved, 0, sizeof(linkd->reserved));
234 /* Setup the link on both entities. */
235 return __media_entity_setup_link(link, linkd->flags);
238 static long media_device_get_topology(struct media_device *mdev, void *arg)
240 struct media_v2_topology *topo = arg;
241 struct media_entity *entity;
242 struct media_interface *intf;
243 struct media_pad *pad;
244 struct media_link *link;
245 struct media_v2_entity kentity, __user *uentity;
246 struct media_v2_interface kintf, __user *uintf;
247 struct media_v2_pad kpad, __user *upad;
248 struct media_v2_link klink, __user *ulink;
252 topo->topology_version = mdev->topology_version;
254 /* Get entities and number of entities */
256 uentity = media_get_uptr(topo->ptr_entities);
257 media_device_for_each_entity(entity, mdev) {
262 if (i > topo->num_entities) {
267 /* Copy fields to userspace struct if not error */
268 memset(&kentity, 0, sizeof(kentity));
269 kentity.id = entity->graph_obj.id;
270 kentity.function = entity->function;
271 kentity.flags = entity->flags;
272 strscpy(kentity.name, entity->name,
273 sizeof(kentity.name));
275 if (copy_to_user(uentity, &kentity, sizeof(kentity)))
279 topo->num_entities = i;
282 /* Get interfaces and number of interfaces */
284 uintf = media_get_uptr(topo->ptr_interfaces);
285 media_device_for_each_intf(intf, mdev) {
290 if (i > topo->num_interfaces) {
295 memset(&kintf, 0, sizeof(kintf));
297 /* Copy intf fields to userspace struct */
298 kintf.id = intf->graph_obj.id;
299 kintf.intf_type = intf->type;
300 kintf.flags = intf->flags;
302 if (media_type(&intf->graph_obj) == MEDIA_GRAPH_INTF_DEVNODE) {
303 struct media_intf_devnode *devnode;
305 devnode = intf_to_devnode(intf);
307 kintf.devnode.major = devnode->major;
308 kintf.devnode.minor = devnode->minor;
311 if (copy_to_user(uintf, &kintf, sizeof(kintf)))
315 topo->num_interfaces = i;
318 /* Get pads and number of pads */
320 upad = media_get_uptr(topo->ptr_pads);
321 media_device_for_each_pad(pad, mdev) {
326 if (i > topo->num_pads) {
331 memset(&kpad, 0, sizeof(kpad));
333 /* Copy pad fields to userspace struct */
334 kpad.id = pad->graph_obj.id;
335 kpad.entity_id = pad->entity->graph_obj.id;
336 kpad.flags = pad->flags;
337 kpad.index = pad->index;
339 if (copy_to_user(upad, &kpad, sizeof(kpad)))
346 /* Get links and number of links */
348 ulink = media_get_uptr(topo->ptr_links);
349 media_device_for_each_link(link, mdev) {
350 if (link->is_backlink)
358 if (i > topo->num_links) {
363 memset(&klink, 0, sizeof(klink));
365 /* Copy link fields to userspace struct */
366 klink.id = link->graph_obj.id;
367 klink.source_id = link->gobj0->id;
368 klink.sink_id = link->gobj1->id;
369 klink.flags = link->flags;
371 if (copy_to_user(ulink, &klink, sizeof(klink)))
381 static long media_device_request_alloc(struct media_device *mdev,
384 if (!mdev->ops || !mdev->ops->req_validate || !mdev->ops->req_queue)
387 return media_request_alloc(mdev, alloc_fd);
390 static long copy_arg_from_user(void *karg, void __user *uarg, unsigned int cmd)
392 if ((_IOC_DIR(cmd) & _IOC_WRITE) &&
393 copy_from_user(karg, uarg, _IOC_SIZE(cmd)))
399 static long copy_arg_to_user(void __user *uarg, void *karg, unsigned int cmd)
401 if ((_IOC_DIR(cmd) & _IOC_READ) &&
402 copy_to_user(uarg, karg, _IOC_SIZE(cmd)))
408 /* Do acquire the graph mutex */
409 #define MEDIA_IOC_FL_GRAPH_MUTEX BIT(0)
411 #define MEDIA_IOC_ARG(__cmd, func, fl, from_user, to_user) \
412 [_IOC_NR(MEDIA_IOC_##__cmd)] = { \
413 .cmd = MEDIA_IOC_##__cmd, \
414 .fn = (long (*)(struct media_device *, void *))func, \
416 .arg_from_user = from_user, \
417 .arg_to_user = to_user, \
420 #define MEDIA_IOC(__cmd, func, fl) \
421 MEDIA_IOC_ARG(__cmd, func, fl, copy_arg_from_user, copy_arg_to_user)
423 /* the table is indexed by _IOC_NR(cmd) */
424 struct media_ioctl_info {
426 unsigned short flags;
427 long (*fn)(struct media_device *dev, void *arg);
428 long (*arg_from_user)(void *karg, void __user *uarg, unsigned int cmd);
429 long (*arg_to_user)(void __user *uarg, void *karg, unsigned int cmd);
432 static const struct media_ioctl_info ioctl_info[] = {
433 MEDIA_IOC(DEVICE_INFO, media_device_get_info, MEDIA_IOC_FL_GRAPH_MUTEX),
434 MEDIA_IOC(ENUM_ENTITIES, media_device_enum_entities, MEDIA_IOC_FL_GRAPH_MUTEX),
435 MEDIA_IOC(ENUM_LINKS, media_device_enum_links, MEDIA_IOC_FL_GRAPH_MUTEX),
436 MEDIA_IOC(SETUP_LINK, media_device_setup_link, MEDIA_IOC_FL_GRAPH_MUTEX),
437 MEDIA_IOC(G_TOPOLOGY, media_device_get_topology, MEDIA_IOC_FL_GRAPH_MUTEX),
438 MEDIA_IOC(REQUEST_ALLOC, media_device_request_alloc, 0),
441 static long media_device_ioctl(struct file *filp, unsigned int cmd,
444 struct media_devnode *devnode = media_devnode_data(filp);
445 struct media_device *dev = devnode->media_dev;
446 const struct media_ioctl_info *info;
447 void __user *arg = (void __user *)__arg;
448 char __karg[256], *karg = __karg;
451 if (_IOC_NR(cmd) >= ARRAY_SIZE(ioctl_info)
452 || ioctl_info[_IOC_NR(cmd)].cmd != cmd)
455 info = &ioctl_info[_IOC_NR(cmd)];
457 if (_IOC_SIZE(info->cmd) > sizeof(__karg)) {
458 karg = kmalloc(_IOC_SIZE(info->cmd), GFP_KERNEL);
463 if (info->arg_from_user) {
464 ret = info->arg_from_user(karg, arg, cmd);
469 if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX)
470 mutex_lock(&dev->graph_mutex);
472 ret = info->fn(dev, karg);
474 if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX)
475 mutex_unlock(&dev->graph_mutex);
477 if (!ret && info->arg_to_user)
478 ret = info->arg_to_user(arg, karg, cmd);
489 struct media_links_enum32 {
491 compat_uptr_t pads; /* struct media_pad_desc * */
492 compat_uptr_t links; /* struct media_link_desc * */
496 static long media_device_enum_links32(struct media_device *mdev,
497 struct media_links_enum32 __user *ulinks)
499 struct media_links_enum links;
500 compat_uptr_t pads_ptr, links_ptr;
502 memset(&links, 0, sizeof(links));
504 if (get_user(links.entity, &ulinks->entity)
505 || get_user(pads_ptr, &ulinks->pads)
506 || get_user(links_ptr, &ulinks->links))
509 links.pads = compat_ptr(pads_ptr);
510 links.links = compat_ptr(links_ptr);
512 return media_device_enum_links(mdev, &links);
515 #define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32)
517 static long media_device_compat_ioctl(struct file *filp, unsigned int cmd,
520 struct media_devnode *devnode = media_devnode_data(filp);
521 struct media_device *dev = devnode->media_dev;
525 case MEDIA_IOC_ENUM_LINKS32:
526 mutex_lock(&dev->graph_mutex);
527 ret = media_device_enum_links32(dev,
528 (struct media_links_enum32 __user *)arg);
529 mutex_unlock(&dev->graph_mutex);
533 return media_device_ioctl(filp, cmd, arg);
538 #endif /* CONFIG_COMPAT */
540 static const struct media_file_operations media_device_fops = {
541 .owner = THIS_MODULE,
542 .open = media_device_open,
543 .ioctl = media_device_ioctl,
545 .compat_ioctl = media_device_compat_ioctl,
546 #endif /* CONFIG_COMPAT */
547 .release = media_device_close,
550 /* -----------------------------------------------------------------------------
554 static ssize_t show_model(struct device *cd,
555 struct device_attribute *attr, char *buf)
557 struct media_devnode *devnode = to_media_devnode(cd);
558 struct media_device *mdev = devnode->media_dev;
560 return sprintf(buf, "%.*s\n", (int)sizeof(mdev->model), mdev->model);
563 static DEVICE_ATTR(model, S_IRUGO, show_model, NULL);
565 /* -----------------------------------------------------------------------------
566 * Registration/unregistration
569 static void media_device_release(struct media_devnode *devnode)
571 dev_dbg(devnode->parent, "Media device released\n");
575 * media_device_register_entity - Register an entity with a media device
576 * @mdev: The media device
577 * @entity: The entity
579 int __must_check media_device_register_entity(struct media_device *mdev,
580 struct media_entity *entity)
582 struct media_entity_notify *notify, *next;
586 if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN ||
587 entity->function == MEDIA_ENT_F_UNKNOWN)
589 "Entity type for entity %s was not initialized!\n",
592 /* Warn if we apparently re-register an entity */
593 WARN_ON(entity->graph_obj.mdev != NULL);
594 entity->graph_obj.mdev = mdev;
595 INIT_LIST_HEAD(&entity->links);
596 entity->num_links = 0;
597 entity->num_backlinks = 0;
599 ret = ida_alloc_min(&mdev->entity_internal_idx, 1, GFP_KERNEL);
602 entity->internal_idx = ret;
604 mutex_lock(&mdev->graph_mutex);
605 mdev->entity_internal_idx_max =
606 max(mdev->entity_internal_idx_max, entity->internal_idx);
608 /* Initialize media_gobj embedded at the entity */
609 media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj);
611 /* Initialize objects at the pads */
612 for (i = 0; i < entity->num_pads; i++)
613 media_gobj_create(mdev, MEDIA_GRAPH_PAD,
614 &entity->pads[i].graph_obj);
616 /* invoke entity_notify callbacks */
617 list_for_each_entry_safe(notify, next, &mdev->entity_notify, list)
618 notify->notify(entity, notify->notify_data);
620 if (mdev->entity_internal_idx_max
621 >= mdev->pm_count_walk.ent_enum.idx_max) {
622 struct media_graph new = { .top = 0 };
625 * Initialise the new graph walk before cleaning up
626 * the old one in order not to spoil the graph walk
627 * object of the media device if graph walk init fails.
629 ret = media_graph_walk_init(&new, mdev);
631 mutex_unlock(&mdev->graph_mutex);
634 media_graph_walk_cleanup(&mdev->pm_count_walk);
635 mdev->pm_count_walk = new;
637 mutex_unlock(&mdev->graph_mutex);
641 EXPORT_SYMBOL_GPL(media_device_register_entity);
643 static void __media_device_unregister_entity(struct media_entity *entity)
645 struct media_device *mdev = entity->graph_obj.mdev;
646 struct media_link *link, *tmp;
647 struct media_interface *intf;
650 ida_free(&mdev->entity_internal_idx, entity->internal_idx);
652 /* Remove all interface links pointing to this entity */
653 list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) {
654 list_for_each_entry_safe(link, tmp, &intf->links, list) {
655 if (link->entity == entity)
656 __media_remove_intf_link(link);
660 /* Remove all data links that belong to this entity */
661 __media_entity_remove_links(entity);
663 /* Remove all pads that belong to this entity */
664 for (i = 0; i < entity->num_pads; i++)
665 media_gobj_destroy(&entity->pads[i].graph_obj);
667 /* Remove the entity */
668 media_gobj_destroy(&entity->graph_obj);
670 /* invoke entity_notify callbacks to handle entity removal?? */
672 entity->graph_obj.mdev = NULL;
675 void media_device_unregister_entity(struct media_entity *entity)
677 struct media_device *mdev = entity->graph_obj.mdev;
682 mutex_lock(&mdev->graph_mutex);
683 __media_device_unregister_entity(entity);
684 mutex_unlock(&mdev->graph_mutex);
686 EXPORT_SYMBOL_GPL(media_device_unregister_entity);
689 * media_device_init() - initialize a media device
690 * @mdev: The media device
692 * The caller is responsible for initializing the media device before
693 * registration. The following fields must be set:
695 * - dev must point to the parent device
696 * - model must be filled with the device model name
698 void media_device_init(struct media_device *mdev)
700 INIT_LIST_HEAD(&mdev->entities);
701 INIT_LIST_HEAD(&mdev->interfaces);
702 INIT_LIST_HEAD(&mdev->pads);
703 INIT_LIST_HEAD(&mdev->links);
704 INIT_LIST_HEAD(&mdev->entity_notify);
706 mutex_init(&mdev->req_queue_mutex);
707 mutex_init(&mdev->graph_mutex);
708 ida_init(&mdev->entity_internal_idx);
710 atomic_set(&mdev->request_id, 0);
712 dev_dbg(mdev->dev, "Media device initialized\n");
714 EXPORT_SYMBOL_GPL(media_device_init);
716 void media_device_cleanup(struct media_device *mdev)
718 ida_destroy(&mdev->entity_internal_idx);
719 mdev->entity_internal_idx_max = 0;
720 media_graph_walk_cleanup(&mdev->pm_count_walk);
721 mutex_destroy(&mdev->graph_mutex);
722 mutex_destroy(&mdev->req_queue_mutex);
724 EXPORT_SYMBOL_GPL(media_device_cleanup);
726 int __must_check __media_device_register(struct media_device *mdev,
727 struct module *owner)
729 struct media_devnode *devnode;
732 devnode = kzalloc(sizeof(*devnode), GFP_KERNEL);
736 /* Register the device node. */
737 mdev->devnode = devnode;
738 devnode->fops = &media_device_fops;
739 devnode->parent = mdev->dev;
740 devnode->release = media_device_release;
742 /* Set version 0 to indicate user-space that the graph is static */
743 mdev->topology_version = 0;
745 ret = media_devnode_register(mdev, devnode, owner);
747 /* devnode free is handled in media_devnode_*() */
748 mdev->devnode = NULL;
752 ret = device_create_file(&devnode->dev, &dev_attr_model);
754 /* devnode free is handled in media_devnode_*() */
755 mdev->devnode = NULL;
756 media_devnode_unregister_prepare(devnode);
757 media_devnode_unregister(devnode);
761 dev_dbg(mdev->dev, "Media device registered\n");
765 EXPORT_SYMBOL_GPL(__media_device_register);
767 int __must_check media_device_register_entity_notify(struct media_device *mdev,
768 struct media_entity_notify *nptr)
770 mutex_lock(&mdev->graph_mutex);
771 list_add_tail(&nptr->list, &mdev->entity_notify);
772 mutex_unlock(&mdev->graph_mutex);
775 EXPORT_SYMBOL_GPL(media_device_register_entity_notify);
778 * Note: Should be called with mdev->lock held.
780 static void __media_device_unregister_entity_notify(struct media_device *mdev,
781 struct media_entity_notify *nptr)
783 list_del(&nptr->list);
786 void media_device_unregister_entity_notify(struct media_device *mdev,
787 struct media_entity_notify *nptr)
789 mutex_lock(&mdev->graph_mutex);
790 __media_device_unregister_entity_notify(mdev, nptr);
791 mutex_unlock(&mdev->graph_mutex);
793 EXPORT_SYMBOL_GPL(media_device_unregister_entity_notify);
795 void media_device_unregister(struct media_device *mdev)
797 struct media_entity *entity;
798 struct media_entity *next;
799 struct media_interface *intf, *tmp_intf;
800 struct media_entity_notify *notify, *nextp;
805 mutex_lock(&mdev->graph_mutex);
807 /* Check if mdev was ever registered at all */
808 if (!media_devnode_is_registered(mdev->devnode)) {
809 mutex_unlock(&mdev->graph_mutex);
813 /* Clear the devnode register bit to avoid races with media dev open */
814 media_devnode_unregister_prepare(mdev->devnode);
816 /* Remove all entities from the media device */
817 list_for_each_entry_safe(entity, next, &mdev->entities, graph_obj.list)
818 __media_device_unregister_entity(entity);
820 /* Remove all entity_notify callbacks from the media device */
821 list_for_each_entry_safe(notify, nextp, &mdev->entity_notify, list)
822 __media_device_unregister_entity_notify(mdev, notify);
824 /* Remove all interfaces from the media device */
825 list_for_each_entry_safe(intf, tmp_intf, &mdev->interfaces,
828 * Unlink the interface, but don't free it here; the
829 * module which created it is responsible for freeing
832 __media_remove_intf_links(intf);
833 media_gobj_destroy(&intf->graph_obj);
836 mutex_unlock(&mdev->graph_mutex);
838 dev_dbg(mdev->dev, "Media device unregistered\n");
840 device_remove_file(&mdev->devnode->dev, &dev_attr_model);
841 media_devnode_unregister(mdev->devnode);
842 /* devnode free is handled in media_devnode_*() */
843 mdev->devnode = NULL;
845 EXPORT_SYMBOL_GPL(media_device_unregister);
847 #if IS_ENABLED(CONFIG_PCI)
848 void media_device_pci_init(struct media_device *mdev,
849 struct pci_dev *pci_dev,
852 mdev->dev = &pci_dev->dev;
855 strscpy(mdev->model, name, sizeof(mdev->model));
857 strscpy(mdev->model, pci_name(pci_dev), sizeof(mdev->model));
859 sprintf(mdev->bus_info, "PCI:%s", pci_name(pci_dev));
861 mdev->hw_revision = (pci_dev->subsystem_vendor << 16)
862 | pci_dev->subsystem_device;
864 media_device_init(mdev);
866 EXPORT_SYMBOL_GPL(media_device_pci_init);
869 #if IS_ENABLED(CONFIG_USB)
870 void __media_device_usb_init(struct media_device *mdev,
871 struct usb_device *udev,
872 const char *board_name,
873 const char *driver_name)
875 mdev->dev = &udev->dev;
878 strscpy(mdev->driver_name, driver_name,
879 sizeof(mdev->driver_name));
882 strscpy(mdev->model, board_name, sizeof(mdev->model));
883 else if (udev->product)
884 strscpy(mdev->model, udev->product, sizeof(mdev->model));
886 strscpy(mdev->model, "unknown model", sizeof(mdev->model));
888 strscpy(mdev->serial, udev->serial, sizeof(mdev->serial));
889 usb_make_path(udev, mdev->bus_info, sizeof(mdev->bus_info));
890 mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
892 media_device_init(mdev);
894 EXPORT_SYMBOL_GPL(__media_device_usb_init);
898 #endif /* CONFIG_MEDIA_CONTROLLER */