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.
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 /* We need to access legacy defines from linux/media.h */
24 #define __NEED_MEDIA_LEGACY_API
26 #include <linux/compat.h>
27 #include <linux/export.h>
28 #include <linux/idr.h>
29 #include <linux/ioctl.h>
30 #include <linux/media.h>
31 #include <linux/slab.h>
32 #include <linux/types.h>
33 #include <linux/pci.h>
34 #include <linux/usb.h>
36 #include <media/media-device.h>
37 #include <media/media-devnode.h>
38 #include <media/media-entity.h>
40 #ifdef CONFIG_MEDIA_CONTROLLER
42 /* -----------------------------------------------------------------------------
46 static inline void __user *media_get_uptr(__u64 arg)
48 return (void __user *)(uintptr_t)arg;
51 static int media_device_open(struct file *filp)
56 static int media_device_close(struct file *filp)
61 static long media_device_get_info(struct media_device *dev, void *arg)
63 struct media_device_info *info = arg;
65 memset(info, 0, sizeof(*info));
67 if (dev->driver_name[0])
68 strlcpy(info->driver, dev->driver_name, sizeof(info->driver));
70 strlcpy(info->driver, dev->dev->driver->name,
71 sizeof(info->driver));
73 strlcpy(info->model, dev->model, sizeof(info->model));
74 strlcpy(info->serial, dev->serial, sizeof(info->serial));
75 strlcpy(info->bus_info, dev->bus_info, sizeof(info->bus_info));
77 info->media_version = MEDIA_API_VERSION;
78 info->hw_revision = dev->hw_revision;
79 info->driver_version = dev->driver_version;
84 static struct media_entity *find_entity(struct media_device *mdev, u32 id)
86 struct media_entity *entity;
87 int next = id & MEDIA_ENT_ID_FLAG_NEXT;
89 id &= ~MEDIA_ENT_ID_FLAG_NEXT;
91 media_device_for_each_entity(entity, mdev) {
92 if (((media_entity_id(entity) == id) && !next) ||
93 ((media_entity_id(entity) > id) && next)) {
101 static long media_device_enum_entities(struct media_device *mdev, void *arg)
103 struct media_entity_desc *entd = arg;
104 struct media_entity *ent;
106 ent = find_entity(mdev, entd->id);
110 memset(entd, 0, sizeof(*entd));
112 entd->id = media_entity_id(ent);
114 strlcpy(entd->name, ent->name, sizeof(entd->name));
115 entd->type = ent->function;
116 entd->revision = 0; /* Unused */
117 entd->flags = ent->flags;
118 entd->group_id = 0; /* Unused */
119 entd->pads = ent->num_pads;
120 entd->links = ent->num_links - ent->num_backlinks;
123 * Workaround for a bug at media-ctl <= v1.10 that makes it to
124 * do the wrong thing if the entity function doesn't belong to
125 * either MEDIA_ENT_F_OLD_BASE or MEDIA_ENT_F_OLD_SUBDEV_BASE
128 * Non-subdevices are expected to be at the MEDIA_ENT_F_OLD_BASE,
129 * or, otherwise, will be silently ignored by media-ctl when
130 * printing the graphviz diagram. So, map them into the devnode
133 if (ent->function < MEDIA_ENT_F_OLD_BASE ||
134 ent->function > MEDIA_ENT_F_TUNER) {
135 if (is_media_entity_v4l2_subdev(ent))
136 entd->type = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
137 else if (ent->function != MEDIA_ENT_F_IO_V4L)
138 entd->type = MEDIA_ENT_T_DEVNODE_UNKNOWN;
141 memcpy(&entd->raw, &ent->info, sizeof(ent->info));
146 static void media_device_kpad_to_upad(const struct media_pad *kpad,
147 struct media_pad_desc *upad)
149 upad->entity = media_entity_id(kpad->entity);
150 upad->index = kpad->index;
151 upad->flags = kpad->flags;
154 static long media_device_enum_links(struct media_device *mdev, void *arg)
156 struct media_links_enum *links = arg;
157 struct media_entity *entity;
159 entity = find_entity(mdev, links->entity);
166 for (p = 0; p < entity->num_pads; p++) {
167 struct media_pad_desc pad;
169 memset(&pad, 0, sizeof(pad));
170 media_device_kpad_to_upad(&entity->pads[p], &pad);
171 if (copy_to_user(&links->pads[p], &pad, sizeof(pad)))
177 struct media_link *link;
178 struct media_link_desc __user *ulink_desc = links->links;
180 list_for_each_entry(link, &entity->links, list) {
181 struct media_link_desc klink_desc;
183 /* Ignore backlinks. */
184 if (link->source->entity != entity)
186 memset(&klink_desc, 0, sizeof(klink_desc));
187 media_device_kpad_to_upad(link->source,
189 media_device_kpad_to_upad(link->sink,
191 klink_desc.flags = link->flags;
192 if (copy_to_user(ulink_desc, &klink_desc,
193 sizeof(*ulink_desc)))
202 static long media_device_setup_link(struct media_device *mdev, void *arg)
204 struct media_link_desc *linkd = arg;
205 struct media_link *link = NULL;
206 struct media_entity *source;
207 struct media_entity *sink;
209 /* Find the source and sink entities and link.
211 source = find_entity(mdev, linkd->source.entity);
212 sink = find_entity(mdev, linkd->sink.entity);
214 if (source == NULL || sink == NULL)
217 if (linkd->source.index >= source->num_pads ||
218 linkd->sink.index >= sink->num_pads)
221 link = media_entity_find_link(&source->pads[linkd->source.index],
222 &sink->pads[linkd->sink.index]);
226 /* Setup the link on both entities. */
227 return __media_entity_setup_link(link, linkd->flags);
230 static long media_device_get_topology(struct media_device *mdev, void *arg)
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;
244 topo->topology_version = mdev->topology_version;
246 /* Get entities and number of entities */
248 uentity = media_get_uptr(topo->ptr_entities);
249 media_device_for_each_entity(entity, mdev) {
254 if (i > topo->num_entities) {
259 /* Copy fields to userspace struct if not error */
260 memset(&kentity, 0, sizeof(kentity));
261 kentity.id = entity->graph_obj.id;
262 kentity.function = entity->function;
263 strncpy(kentity.name, entity->name,
264 sizeof(kentity.name));
266 if (copy_to_user(uentity, &kentity, sizeof(kentity)))
270 topo->num_entities = i;
272 /* Get interfaces and number of interfaces */
274 uintf = media_get_uptr(topo->ptr_interfaces);
275 media_device_for_each_intf(intf, mdev) {
280 if (i > topo->num_interfaces) {
285 memset(&kintf, 0, sizeof(kintf));
287 /* Copy intf fields to userspace struct */
288 kintf.id = intf->graph_obj.id;
289 kintf.intf_type = intf->type;
290 kintf.flags = intf->flags;
292 if (media_type(&intf->graph_obj) == MEDIA_GRAPH_INTF_DEVNODE) {
293 struct media_intf_devnode *devnode;
295 devnode = intf_to_devnode(intf);
297 kintf.devnode.major = devnode->major;
298 kintf.devnode.minor = devnode->minor;
301 if (copy_to_user(uintf, &kintf, sizeof(kintf)))
305 topo->num_interfaces = i;
307 /* Get pads and number of pads */
309 upad = media_get_uptr(topo->ptr_pads);
310 media_device_for_each_pad(pad, mdev) {
315 if (i > topo->num_pads) {
320 memset(&kpad, 0, sizeof(kpad));
322 /* Copy pad fields to userspace struct */
323 kpad.id = pad->graph_obj.id;
324 kpad.entity_id = pad->entity->graph_obj.id;
325 kpad.flags = pad->flags;
327 if (copy_to_user(upad, &kpad, sizeof(kpad)))
333 /* Get links and number of links */
335 ulink = media_get_uptr(topo->ptr_links);
336 media_device_for_each_link(link, mdev) {
337 if (link->is_backlink)
345 if (i > topo->num_links) {
350 memset(&klink, 0, sizeof(klink));
352 /* Copy link fields to userspace struct */
353 klink.id = link->graph_obj.id;
354 klink.source_id = link->gobj0->id;
355 klink.sink_id = link->gobj1->id;
356 klink.flags = link->flags;
358 if (copy_to_user(ulink, &klink, sizeof(klink)))
367 static long copy_arg_from_user(void *karg, void __user *uarg, unsigned int cmd)
369 /* All media IOCTLs are _IOWR() */
370 if (copy_from_user(karg, uarg, _IOC_SIZE(cmd)))
376 static long copy_arg_to_user(void __user *uarg, void *karg, unsigned int cmd)
378 /* All media IOCTLs are _IOWR() */
379 if (copy_to_user(uarg, karg, _IOC_SIZE(cmd)))
385 /* Do acquire the graph mutex */
386 #define MEDIA_IOC_FL_GRAPH_MUTEX BIT(0)
388 #define MEDIA_IOC_ARG(__cmd, func, fl, from_user, to_user) \
389 [_IOC_NR(MEDIA_IOC_##__cmd)] = { \
390 .cmd = MEDIA_IOC_##__cmd, \
391 .fn = (long (*)(struct media_device *, void *))func, \
393 .arg_from_user = from_user, \
394 .arg_to_user = to_user, \
397 #define MEDIA_IOC(__cmd, func, fl) \
398 MEDIA_IOC_ARG(__cmd, func, fl, copy_arg_from_user, copy_arg_to_user)
400 /* the table is indexed by _IOC_NR(cmd) */
401 struct media_ioctl_info {
403 unsigned short flags;
404 long (*fn)(struct media_device *dev, void *arg);
405 long (*arg_from_user)(void *karg, void __user *uarg, unsigned int cmd);
406 long (*arg_to_user)(void __user *uarg, void *karg, unsigned int cmd);
409 static const struct media_ioctl_info ioctl_info[] = {
410 MEDIA_IOC(DEVICE_INFO, media_device_get_info, MEDIA_IOC_FL_GRAPH_MUTEX),
411 MEDIA_IOC(ENUM_ENTITIES, media_device_enum_entities, MEDIA_IOC_FL_GRAPH_MUTEX),
412 MEDIA_IOC(ENUM_LINKS, media_device_enum_links, MEDIA_IOC_FL_GRAPH_MUTEX),
413 MEDIA_IOC(SETUP_LINK, media_device_setup_link, MEDIA_IOC_FL_GRAPH_MUTEX),
414 MEDIA_IOC(G_TOPOLOGY, media_device_get_topology, MEDIA_IOC_FL_GRAPH_MUTEX),
417 static long media_device_ioctl(struct file *filp, unsigned int cmd,
420 struct media_devnode *devnode = media_devnode_data(filp);
421 struct media_device *dev = devnode->media_dev;
422 const struct media_ioctl_info *info;
423 void __user *arg = (void __user *)__arg;
424 char __karg[256], *karg = __karg;
427 if (_IOC_NR(cmd) >= ARRAY_SIZE(ioctl_info)
428 || ioctl_info[_IOC_NR(cmd)].cmd != cmd)
431 info = &ioctl_info[_IOC_NR(cmd)];
433 if (_IOC_SIZE(info->cmd) > sizeof(__karg)) {
434 karg = kmalloc(_IOC_SIZE(info->cmd), GFP_KERNEL);
439 if (info->arg_from_user) {
440 ret = info->arg_from_user(karg, arg, cmd);
445 if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX)
446 mutex_lock(&dev->graph_mutex);
448 ret = info->fn(dev, karg);
450 if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX)
451 mutex_unlock(&dev->graph_mutex);
453 if (!ret && info->arg_to_user)
454 ret = info->arg_to_user(arg, karg, cmd);
465 struct media_links_enum32 {
467 compat_uptr_t pads; /* struct media_pad_desc * */
468 compat_uptr_t links; /* struct media_link_desc * */
472 static long media_device_enum_links32(struct media_device *mdev,
473 struct media_links_enum32 __user *ulinks)
475 struct media_links_enum links;
476 compat_uptr_t pads_ptr, links_ptr;
479 memset(&links, 0, sizeof(links));
481 if (get_user(links.entity, &ulinks->entity)
482 || get_user(pads_ptr, &ulinks->pads)
483 || get_user(links_ptr, &ulinks->links))
486 links.pads = compat_ptr(pads_ptr);
487 links.links = compat_ptr(links_ptr);
489 ret = media_device_enum_links(mdev, &links);
493 if (copy_to_user(ulinks->reserved, links.reserved,
494 sizeof(ulinks->reserved)))
499 #define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32)
501 static long media_device_compat_ioctl(struct file *filp, unsigned int cmd,
504 struct media_devnode *devnode = media_devnode_data(filp);
505 struct media_device *dev = devnode->media_dev;
509 case MEDIA_IOC_ENUM_LINKS32:
510 mutex_lock(&dev->graph_mutex);
511 ret = media_device_enum_links32(dev,
512 (struct media_links_enum32 __user *)arg);
513 mutex_unlock(&dev->graph_mutex);
517 return media_device_ioctl(filp, cmd, arg);
522 #endif /* CONFIG_COMPAT */
524 static const struct media_file_operations media_device_fops = {
525 .owner = THIS_MODULE,
526 .open = media_device_open,
527 .ioctl = media_device_ioctl,
529 .compat_ioctl = media_device_compat_ioctl,
530 #endif /* CONFIG_COMPAT */
531 .release = media_device_close,
534 /* -----------------------------------------------------------------------------
538 static ssize_t show_model(struct device *cd,
539 struct device_attribute *attr, char *buf)
541 struct media_devnode *devnode = to_media_devnode(cd);
542 struct media_device *mdev = devnode->media_dev;
544 return sprintf(buf, "%.*s\n", (int)sizeof(mdev->model), mdev->model);
547 static DEVICE_ATTR(model, S_IRUGO, show_model, NULL);
549 /* -----------------------------------------------------------------------------
550 * Registration/unregistration
553 static void media_device_release(struct media_devnode *mdev)
555 dev_dbg(mdev->parent, "Media device released\n");
559 * media_device_register_entity - Register an entity with a media device
560 * @mdev: The media device
561 * @entity: The entity
563 int __must_check media_device_register_entity(struct media_device *mdev,
564 struct media_entity *entity)
566 struct media_entity_notify *notify, *next;
570 if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN ||
571 entity->function == MEDIA_ENT_F_UNKNOWN)
573 "Entity type for entity %s was not initialized!\n",
576 /* Warn if we apparently re-register an entity */
577 WARN_ON(entity->graph_obj.mdev != NULL);
578 entity->graph_obj.mdev = mdev;
579 INIT_LIST_HEAD(&entity->links);
580 entity->num_links = 0;
581 entity->num_backlinks = 0;
583 if (!ida_pre_get(&mdev->entity_internal_idx, GFP_KERNEL))
586 mutex_lock(&mdev->graph_mutex);
588 ret = ida_get_new_above(&mdev->entity_internal_idx, 1,
589 &entity->internal_idx);
591 mutex_unlock(&mdev->graph_mutex);
595 mdev->entity_internal_idx_max =
596 max(mdev->entity_internal_idx_max, entity->internal_idx);
598 /* Initialize media_gobj embedded at the entity */
599 media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj);
601 /* Initialize objects at the pads */
602 for (i = 0; i < entity->num_pads; i++)
603 media_gobj_create(mdev, MEDIA_GRAPH_PAD,
604 &entity->pads[i].graph_obj);
606 /* invoke entity_notify callbacks */
607 list_for_each_entry_safe(notify, next, &mdev->entity_notify, list) {
608 (notify)->notify(entity, notify->notify_data);
611 if (mdev->entity_internal_idx_max
612 >= mdev->pm_count_walk.ent_enum.idx_max) {
613 struct media_entity_graph new = { .top = 0 };
616 * Initialise the new graph walk before cleaning up
617 * the old one in order not to spoil the graph walk
618 * object of the media device if graph walk init fails.
620 ret = media_entity_graph_walk_init(&new, mdev);
622 mutex_unlock(&mdev->graph_mutex);
625 media_entity_graph_walk_cleanup(&mdev->pm_count_walk);
626 mdev->pm_count_walk = new;
628 mutex_unlock(&mdev->graph_mutex);
632 EXPORT_SYMBOL_GPL(media_device_register_entity);
634 static void __media_device_unregister_entity(struct media_entity *entity)
636 struct media_device *mdev = entity->graph_obj.mdev;
637 struct media_link *link, *tmp;
638 struct media_interface *intf;
641 ida_simple_remove(&mdev->entity_internal_idx, entity->internal_idx);
643 /* Remove all interface links pointing to this entity */
644 list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) {
645 list_for_each_entry_safe(link, tmp, &intf->links, list) {
646 if (link->entity == entity)
647 __media_remove_intf_link(link);
651 /* Remove all data links that belong to this entity */
652 __media_entity_remove_links(entity);
654 /* Remove all pads that belong to this entity */
655 for (i = 0; i < entity->num_pads; i++)
656 media_gobj_destroy(&entity->pads[i].graph_obj);
658 /* Remove the entity */
659 media_gobj_destroy(&entity->graph_obj);
661 /* invoke entity_notify callbacks to handle entity removal?? */
663 entity->graph_obj.mdev = NULL;
666 void media_device_unregister_entity(struct media_entity *entity)
668 struct media_device *mdev = entity->graph_obj.mdev;
673 mutex_lock(&mdev->graph_mutex);
674 __media_device_unregister_entity(entity);
675 mutex_unlock(&mdev->graph_mutex);
677 EXPORT_SYMBOL_GPL(media_device_unregister_entity);
680 * media_device_init() - initialize a media device
681 * @mdev: The media device
683 * The caller is responsible for initializing the media device before
684 * registration. The following fields must be set:
686 * - dev must point to the parent device
687 * - model must be filled with the device model name
689 void media_device_init(struct media_device *mdev)
691 INIT_LIST_HEAD(&mdev->entities);
692 INIT_LIST_HEAD(&mdev->interfaces);
693 INIT_LIST_HEAD(&mdev->pads);
694 INIT_LIST_HEAD(&mdev->links);
695 INIT_LIST_HEAD(&mdev->entity_notify);
696 mutex_init(&mdev->graph_mutex);
697 ida_init(&mdev->entity_internal_idx);
699 dev_dbg(mdev->dev, "Media device initialized\n");
701 EXPORT_SYMBOL_GPL(media_device_init);
703 void media_device_cleanup(struct media_device *mdev)
705 ida_destroy(&mdev->entity_internal_idx);
706 mdev->entity_internal_idx_max = 0;
707 media_entity_graph_walk_cleanup(&mdev->pm_count_walk);
708 mutex_destroy(&mdev->graph_mutex);
710 EXPORT_SYMBOL_GPL(media_device_cleanup);
712 int __must_check __media_device_register(struct media_device *mdev,
713 struct module *owner)
715 struct media_devnode *devnode;
718 devnode = kzalloc(sizeof(*devnode), GFP_KERNEL);
722 /* Register the device node. */
723 mdev->devnode = devnode;
724 devnode->fops = &media_device_fops;
725 devnode->parent = mdev->dev;
726 devnode->release = media_device_release;
728 /* Set version 0 to indicate user-space that the graph is static */
729 mdev->topology_version = 0;
731 ret = media_devnode_register(mdev, devnode, owner);
733 /* devnode free is handled in media_devnode_*() */
734 mdev->devnode = NULL;
738 ret = device_create_file(&devnode->dev, &dev_attr_model);
740 /* devnode free is handled in media_devnode_*() */
741 mdev->devnode = NULL;
742 media_devnode_unregister_prepare(devnode);
743 media_devnode_unregister(devnode);
747 dev_dbg(mdev->dev, "Media device registered\n");
751 EXPORT_SYMBOL_GPL(__media_device_register);
753 int __must_check media_device_register_entity_notify(struct media_device *mdev,
754 struct media_entity_notify *nptr)
756 mutex_lock(&mdev->graph_mutex);
757 list_add_tail(&nptr->list, &mdev->entity_notify);
758 mutex_unlock(&mdev->graph_mutex);
761 EXPORT_SYMBOL_GPL(media_device_register_entity_notify);
764 * Note: Should be called with mdev->lock held.
766 static void __media_device_unregister_entity_notify(struct media_device *mdev,
767 struct media_entity_notify *nptr)
769 list_del(&nptr->list);
772 void media_device_unregister_entity_notify(struct media_device *mdev,
773 struct media_entity_notify *nptr)
775 mutex_lock(&mdev->graph_mutex);
776 __media_device_unregister_entity_notify(mdev, nptr);
777 mutex_unlock(&mdev->graph_mutex);
779 EXPORT_SYMBOL_GPL(media_device_unregister_entity_notify);
781 void media_device_unregister(struct media_device *mdev)
783 struct media_entity *entity;
784 struct media_entity *next;
785 struct media_interface *intf, *tmp_intf;
786 struct media_entity_notify *notify, *nextp;
791 mutex_lock(&mdev->graph_mutex);
793 /* Check if mdev was ever registered at all */
794 if (!media_devnode_is_registered(mdev->devnode)) {
795 mutex_unlock(&mdev->graph_mutex);
799 /* Clear the devnode register bit to avoid races with media dev open */
800 media_devnode_unregister_prepare(mdev->devnode);
802 /* Remove all entities from the media device */
803 list_for_each_entry_safe(entity, next, &mdev->entities, graph_obj.list)
804 __media_device_unregister_entity(entity);
806 /* Remove all entity_notify callbacks from the media device */
807 list_for_each_entry_safe(notify, nextp, &mdev->entity_notify, list)
808 __media_device_unregister_entity_notify(mdev, notify);
810 /* Remove all interfaces from the media device */
811 list_for_each_entry_safe(intf, tmp_intf, &mdev->interfaces,
813 __media_remove_intf_links(intf);
814 media_gobj_destroy(&intf->graph_obj);
818 mutex_unlock(&mdev->graph_mutex);
820 dev_dbg(mdev->dev, "Media device unregistered\n");
822 device_remove_file(&mdev->devnode->dev, &dev_attr_model);
823 media_devnode_unregister(mdev->devnode);
824 /* devnode free is handled in media_devnode_*() */
825 mdev->devnode = NULL;
827 EXPORT_SYMBOL_GPL(media_device_unregister);
829 static void media_device_release_devres(struct device *dev, void *res)
833 struct media_device *media_device_get_devres(struct device *dev)
835 struct media_device *mdev;
837 mdev = devres_find(dev, media_device_release_devres, NULL, NULL);
841 mdev = devres_alloc(media_device_release_devres,
842 sizeof(struct media_device), GFP_KERNEL);
845 return devres_get(dev, mdev, NULL, NULL);
847 EXPORT_SYMBOL_GPL(media_device_get_devres);
849 struct media_device *media_device_find_devres(struct device *dev)
851 return devres_find(dev, media_device_release_devres, NULL, NULL);
853 EXPORT_SYMBOL_GPL(media_device_find_devres);
855 #if IS_ENABLED(CONFIG_PCI)
856 void media_device_pci_init(struct media_device *mdev,
857 struct pci_dev *pci_dev,
860 mdev->dev = &pci_dev->dev;
863 strlcpy(mdev->model, name, sizeof(mdev->model));
865 strlcpy(mdev->model, pci_name(pci_dev), sizeof(mdev->model));
867 sprintf(mdev->bus_info, "PCI:%s", pci_name(pci_dev));
869 mdev->hw_revision = (pci_dev->subsystem_vendor << 16)
870 | pci_dev->subsystem_device;
872 mdev->driver_version = LINUX_VERSION_CODE;
874 media_device_init(mdev);
876 EXPORT_SYMBOL_GPL(media_device_pci_init);
879 #if IS_ENABLED(CONFIG_USB)
880 void __media_device_usb_init(struct media_device *mdev,
881 struct usb_device *udev,
882 const char *board_name,
883 const char *driver_name)
885 mdev->dev = &udev->dev;
888 strlcpy(mdev->driver_name, driver_name,
889 sizeof(mdev->driver_name));
892 strlcpy(mdev->model, board_name, sizeof(mdev->model));
893 else if (udev->product)
894 strlcpy(mdev->model, udev->product, sizeof(mdev->model));
896 strlcpy(mdev->model, "unknown model", sizeof(mdev->model));
898 strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial));
899 usb_make_path(udev, mdev->bus_info, sizeof(mdev->bus_info));
900 mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
901 mdev->driver_version = LINUX_VERSION_CODE;
903 media_device_init(mdev);
905 EXPORT_SYMBOL_GPL(__media_device_usb_init);
909 #endif /* CONFIG_MEDIA_CONTROLLER */