diff options
Diffstat (limited to 'drivers/media/media-device.c')
| -rw-r--r-- | drivers/media/media-device.c | 902 |
1 files changed, 0 insertions, 902 deletions
diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c deleted file mode 100644 index b8ec88612df7..000000000000 --- a/drivers/media/media-device.c +++ /dev/null @@ -1,902 +0,0 @@ -/* - * Media device - * - * Copyright (C) 2010 Nokia Corporation - * - * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com> - * Sakari Ailus <sakari.ailus@iki.fi> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <linux/compat.h> -#include <linux/export.h> -#include <linux/idr.h> -#include <linux/ioctl.h> -#include <linux/media.h> -#include <linux/slab.h> -#include <linux/types.h> -#include <linux/pci.h> -#include <linux/usb.h> -#include <linux/version.h> - -#include <media/media-device.h> -#include <media/media-devnode.h> -#include <media/media-entity.h> -#include <media/media-request.h> - -#ifdef CONFIG_MEDIA_CONTROLLER - -/* - * Legacy defines from linux/media.h. This is the only place we need this - * so we just define it here. The media.h header doesn't expose it to the - * kernel to prevent it from being used by drivers, but here (and only here!) - * we need it to handle the legacy behavior. - */ -#define MEDIA_ENT_SUBTYPE_MASK 0x0000ffff -#define MEDIA_ENT_T_DEVNODE_UNKNOWN (MEDIA_ENT_F_OLD_BASE | \ - MEDIA_ENT_SUBTYPE_MASK) - -/* ----------------------------------------------------------------------------- - * Userspace API - */ - -static inline void __user *media_get_uptr(__u64 arg) -{ - return (void __user *)(uintptr_t)arg; -} - -static int media_device_open(struct file *filp) -{ - return 0; -} - -static int media_device_close(struct file *filp) -{ - return 0; -} - -static long media_device_get_info(struct media_device *dev, void *arg) -{ - struct media_device_info *info = arg; - - memset(info, 0, sizeof(*info)); - - if (dev->driver_name[0]) - strscpy(info->driver, dev->driver_name, sizeof(info->driver)); - else - strscpy(info->driver, dev->dev->driver->name, - sizeof(info->driver)); - - strscpy(info->model, dev->model, sizeof(info->model)); - strscpy(info->serial, dev->serial, sizeof(info->serial)); - strscpy(info->bus_info, dev->bus_info, sizeof(info->bus_info)); - - info->media_version = LINUX_VERSION_CODE; - info->driver_version = info->media_version; - info->hw_revision = dev->hw_revision; - - return 0; -} - -static struct media_entity *find_entity(struct media_device *mdev, u32 id) -{ - struct media_entity *entity; - int next = id & MEDIA_ENT_ID_FLAG_NEXT; - - id &= ~MEDIA_ENT_ID_FLAG_NEXT; - - media_device_for_each_entity(entity, mdev) { - if (((media_entity_id(entity) == id) && !next) || - ((media_entity_id(entity) > id) && next)) { - return entity; - } - } - - return NULL; -} - -static long media_device_enum_entities(struct media_device *mdev, void *arg) -{ - struct media_entity_desc *entd = arg; - struct media_entity *ent; - - ent = find_entity(mdev, entd->id); - if (ent == NULL) - return -EINVAL; - - memset(entd, 0, sizeof(*entd)); - - entd->id = media_entity_id(ent); - if (ent->name) - strscpy(entd->name, ent->name, sizeof(entd->name)); - entd->type = ent->function; - entd->revision = 0; /* Unused */ - entd->flags = ent->flags; - entd->group_id = 0; /* Unused */ - entd->pads = ent->num_pads; - entd->links = ent->num_links - ent->num_backlinks; - - /* - * Workaround for a bug at media-ctl <= v1.10 that makes it to - * do the wrong thing if the entity function doesn't belong to - * either MEDIA_ENT_F_OLD_BASE or MEDIA_ENT_F_OLD_SUBDEV_BASE - * Ranges. - * - * Non-subdevices are expected to be at the MEDIA_ENT_F_OLD_BASE, - * or, otherwise, will be silently ignored by media-ctl when - * printing the graphviz diagram. So, map them into the devnode - * old range. - */ - if (ent->function < MEDIA_ENT_F_OLD_BASE || - ent->function > MEDIA_ENT_F_TUNER) { - if (is_media_entity_v4l2_subdev(ent)) - entd->type = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN; - else if (ent->function != MEDIA_ENT_F_IO_V4L) - entd->type = MEDIA_ENT_T_DEVNODE_UNKNOWN; - } - - memcpy(&entd->raw, &ent->info, sizeof(ent->info)); - - return 0; -} - -static void media_device_kpad_to_upad(const struct media_pad *kpad, - struct media_pad_desc *upad) -{ - upad->entity = media_entity_id(kpad->entity); - upad->index = kpad->index; - upad->flags = kpad->flags; -} - -static long media_device_enum_links(struct media_device *mdev, void *arg) -{ - struct media_links_enum *links = arg; - struct media_entity *entity; - - entity = find_entity(mdev, links->entity); - if (entity == NULL) - return -EINVAL; - - if (links->pads) { - unsigned int p; - - for (p = 0; p < entity->num_pads; p++) { - struct media_pad_desc pad; - - memset(&pad, 0, sizeof(pad)); - media_device_kpad_to_upad(&entity->pads[p], &pad); - if (copy_to_user(&links->pads[p], &pad, sizeof(pad))) - return -EFAULT; - } - } - - if (links->links) { - struct media_link *link; - struct media_link_desc __user *ulink_desc = links->links; - - list_for_each_entry(link, &entity->links, list) { - struct media_link_desc klink_desc; - - /* Ignore backlinks. */ - if (link->source->entity != entity) - continue; - memset(&klink_desc, 0, sizeof(klink_desc)); - media_device_kpad_to_upad(link->source, - &klink_desc.source); - media_device_kpad_to_upad(link->sink, - &klink_desc.sink); - klink_desc.flags = link->flags; - if (copy_to_user(ulink_desc, &klink_desc, - sizeof(*ulink_desc))) - return -EFAULT; - ulink_desc++; - } - } - memset(links->reserved, 0, sizeof(links->reserved)); - - return 0; -} - -static long media_device_setup_link(struct media_device *mdev, void *arg) -{ - struct media_link_desc *linkd = arg; - struct media_link *link = NULL; - struct media_entity *source; - struct media_entity *sink; - - /* Find the source and sink entities and link. - */ - source = find_entity(mdev, linkd->source.entity); - sink = find_entity(mdev, linkd->sink.entity); - - if (source == NULL || sink == NULL) - return -EINVAL; - - if (linkd->source.index >= source->num_pads || - linkd->sink.index >= sink->num_pads) - return -EINVAL; - - link = media_entity_find_link(&source->pads[linkd->source.index], - &sink->pads[linkd->sink.index]); - if (link == NULL) - return -EINVAL; - - memset(linkd->reserved, 0, sizeof(linkd->reserved)); - - /* Setup the link on both entities. */ - return __media_entity_setup_link(link, linkd->flags); -} - -static long media_device_get_topology(struct media_device *mdev, void *arg) -{ - struct media_v2_topology *topo = arg; - struct media_entity *entity; - struct media_interface *intf; - struct media_pad *pad; - struct media_link *link; - struct media_v2_entity kentity, __user *uentity; - struct media_v2_interface kintf, __user *uintf; - struct media_v2_pad kpad, __user *upad; - struct media_v2_link klink, __user *ulink; - unsigned int i; - int ret = 0; - - topo->topology_version = mdev->topology_version; - - /* Get entities and number of entities */ - i = 0; - uentity = media_get_uptr(topo->ptr_entities); - media_device_for_each_entity(entity, mdev) { - i++; - if (ret || !uentity) - continue; - - if (i > topo->num_entities) { - ret = -ENOSPC; - continue; - } - - /* Copy fields to userspace struct if not error */ - memset(&kentity, 0, sizeof(kentity)); - kentity.id = entity->graph_obj.id; - kentity.function = entity->function; - kentity.flags = entity->flags; - strscpy(kentity.name, entity->name, - sizeof(kentity.name)); - - if (copy_to_user(uentity, &kentity, sizeof(kentity))) - ret = -EFAULT; - uentity++; - } - topo->num_entities = i; - topo->reserved1 = 0; - - /* Get interfaces and number of interfaces */ - i = 0; - uintf = media_get_uptr(topo->ptr_interfaces); - media_device_for_each_intf(intf, mdev) { - i++; - if (ret || !uintf) - continue; - - if (i > topo->num_interfaces) { - ret = -ENOSPC; - continue; - } - - memset(&kintf, 0, sizeof(kintf)); - - /* Copy intf fields to userspace struct */ - kintf.id = intf->graph_obj.id; - kintf.intf_type = intf->type; - kintf.flags = intf->flags; - - if (media_type(&intf->graph_obj) == MEDIA_GRAPH_INTF_DEVNODE) { - struct media_intf_devnode *devnode; - - devnode = intf_to_devnode(intf); - - kintf.devnode.major = devnode->major; - kintf.devnode.minor = devnode->minor; - } - - if (copy_to_user(uintf, &kintf, sizeof(kintf))) - ret = -EFAULT; - uintf++; - } - topo->num_interfaces = i; - topo->reserved2 = 0; - - /* Get pads and number of pads */ - i = 0; - upad = media_get_uptr(topo->ptr_pads); - media_device_for_each_pad(pad, mdev) { - i++; - if (ret || !upad) - continue; - - if (i > topo->num_pads) { - ret = -ENOSPC; - continue; - } - - memset(&kpad, 0, sizeof(kpad)); - - /* Copy pad fields to userspace struct */ - kpad.id = pad->graph_obj.id; - kpad.entity_id = pad->entity->graph_obj.id; - kpad.flags = pad->flags; - kpad.index = pad->index; - - if (copy_to_user(upad, &kpad, sizeof(kpad))) - ret = -EFAULT; - upad++; - } - topo->num_pads = i; - topo->reserved3 = 0; - - /* Get links and number of links */ - i = 0; - ulink = media_get_uptr(topo->ptr_links); - media_device_for_each_link(link, mdev) { - if (link->is_backlink) - continue; - - i++; - - if (ret || !ulink) - continue; - - if (i > topo->num_links) { - ret = -ENOSPC; - continue; - } - - memset(&klink, 0, sizeof(klink)); - - /* Copy link fields to userspace struct */ - klink.id = link->graph_obj.id; - klink.source_id = link->gobj0->id; - klink.sink_id = link->gobj1->id; - klink.flags = link->flags; - - if (copy_to_user(ulink, &klink, sizeof(klink))) - ret = -EFAULT; - ulink++; - } - topo->num_links = i; - topo->reserved4 = 0; - - return ret; -} - -static long media_device_request_alloc(struct media_device *mdev, - int *alloc_fd) -{ -#ifdef CONFIG_MEDIA_CONTROLLER_REQUEST_API - if (!mdev->ops || !mdev->ops->req_validate || !mdev->ops->req_queue) - return -ENOTTY; - - return media_request_alloc(mdev, alloc_fd); -#else - return -ENOTTY; -#endif -} - -static long copy_arg_from_user(void *karg, void __user *uarg, unsigned int cmd) -{ - if ((_IOC_DIR(cmd) & _IOC_WRITE) && - copy_from_user(karg, uarg, _IOC_SIZE(cmd))) - return -EFAULT; - - return 0; -} - -static long copy_arg_to_user(void __user *uarg, void *karg, unsigned int cmd) -{ - if ((_IOC_DIR(cmd) & _IOC_READ) && - copy_to_user(uarg, karg, _IOC_SIZE(cmd))) - return -EFAULT; - - return 0; -} - -/* Do acquire the graph mutex */ -#define MEDIA_IOC_FL_GRAPH_MUTEX BIT(0) - -#define MEDIA_IOC_ARG(__cmd, func, fl, from_user, to_user) \ - [_IOC_NR(MEDIA_IOC_##__cmd)] = { \ - .cmd = MEDIA_IOC_##__cmd, \ - .fn = (long (*)(struct media_device *, void *))func, \ - .flags = fl, \ - .arg_from_user = from_user, \ - .arg_to_user = to_user, \ - } - -#define MEDIA_IOC(__cmd, func, fl) \ - MEDIA_IOC_ARG(__cmd, func, fl, copy_arg_from_user, copy_arg_to_user) - -/* the table is indexed by _IOC_NR(cmd) */ -struct media_ioctl_info { - unsigned int cmd; - unsigned short flags; - long (*fn)(struct media_device *dev, void *arg); - long (*arg_from_user)(void *karg, void __user *uarg, unsigned int cmd); - long (*arg_to_user)(void __user *uarg, void *karg, unsigned int cmd); -}; - -static const struct media_ioctl_info ioctl_info[] = { - MEDIA_IOC(DEVICE_INFO, media_device_get_info, MEDIA_IOC_FL_GRAPH_MUTEX), - MEDIA_IOC(ENUM_ENTITIES, media_device_enum_entities, MEDIA_IOC_FL_GRAPH_MUTEX), - MEDIA_IOC(ENUM_LINKS, media_device_enum_links, MEDIA_IOC_FL_GRAPH_MUTEX), - MEDIA_IOC(SETUP_LINK, media_device_setup_link, MEDIA_IOC_FL_GRAPH_MUTEX), - MEDIA_IOC(G_TOPOLOGY, media_device_get_topology, MEDIA_IOC_FL_GRAPH_MUTEX), - MEDIA_IOC(REQUEST_ALLOC, media_device_request_alloc, 0), -}; - -static long media_device_ioctl(struct file *filp, unsigned int cmd, - unsigned long __arg) -{ - struct media_devnode *devnode = media_devnode_data(filp); - struct media_device *dev = devnode->media_dev; - const struct media_ioctl_info *info; - void __user *arg = (void __user *)__arg; - char __karg[256], *karg = __karg; - long ret; - - if (_IOC_NR(cmd) >= ARRAY_SIZE(ioctl_info) - || ioctl_info[_IOC_NR(cmd)].cmd != cmd) - return -ENOIOCTLCMD; - - info = &ioctl_info[_IOC_NR(cmd)]; - - if (_IOC_SIZE(info->cmd) > sizeof(__karg)) { - karg = kmalloc(_IOC_SIZE(info->cmd), GFP_KERNEL); - if (!karg) - return -ENOMEM; - } - - if (info->arg_from_user) { - ret = info->arg_from_user(karg, arg, cmd); - if (ret) - goto out_free; - } - - if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX) - mutex_lock(&dev->graph_mutex); - - ret = info->fn(dev, karg); - - if (info->flags & MEDIA_IOC_FL_GRAPH_MUTEX) - mutex_unlock(&dev->graph_mutex); - - if (!ret && info->arg_to_user) - ret = info->arg_to_user(arg, karg, cmd); - -out_free: - if (karg != __karg) - kfree(karg); - - return ret; -} - -#ifdef CONFIG_COMPAT - -struct media_links_enum32 { - __u32 entity; - compat_uptr_t pads; /* struct media_pad_desc * */ - compat_uptr_t links; /* struct media_link_desc * */ - __u32 reserved[4]; -}; - -static long media_device_enum_links32(struct media_device *mdev, - struct media_links_enum32 __user *ulinks) -{ - struct media_links_enum links; - compat_uptr_t pads_ptr, links_ptr; - - memset(&links, 0, sizeof(links)); - - if (get_user(links.entity, &ulinks->entity) - || get_user(pads_ptr, &ulinks->pads) - || get_user(links_ptr, &ulinks->links)) - return -EFAULT; - - links.pads = compat_ptr(pads_ptr); - links.links = compat_ptr(links_ptr); - - return media_device_enum_links(mdev, &links); -} - -#define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32) - -static long media_device_compat_ioctl(struct file *filp, unsigned int cmd, - unsigned long arg) -{ - struct media_devnode *devnode = media_devnode_data(filp); - struct media_device *dev = devnode->media_dev; - long ret; - - switch (cmd) { - case MEDIA_IOC_ENUM_LINKS32: - mutex_lock(&dev->graph_mutex); - ret = media_device_enum_links32(dev, - (struct media_links_enum32 __user *)arg); - mutex_unlock(&dev->graph_mutex); - break; - - default: - return media_device_ioctl(filp, cmd, arg); - } - - return ret; -} -#endif /* CONFIG_COMPAT */ - -static const struct media_file_operations media_device_fops = { - .owner = THIS_MODULE, - .open = media_device_open, - .ioctl = media_device_ioctl, -#ifdef CONFIG_COMPAT - .compat_ioctl = media_device_compat_ioctl, -#endif /* CONFIG_COMPAT */ - .release = media_device_close, -}; - -/* ----------------------------------------------------------------------------- - * sysfs - */ - -static ssize_t show_model(struct device *cd, - struct device_attribute *attr, char *buf) -{ - struct media_devnode *devnode = to_media_devnode(cd); - struct media_device *mdev = devnode->media_dev; - - return sprintf(buf, "%.*s\n", (int)sizeof(mdev->model), mdev->model); -} - -static DEVICE_ATTR(model, S_IRUGO, show_model, NULL); - -/* ----------------------------------------------------------------------------- - * Registration/unregistration - */ - -static void media_device_release(struct media_devnode *devnode) -{ - dev_dbg(devnode->parent, "Media device released\n"); -} - -/** - * media_device_register_entity - Register an entity with a media device - * @mdev: The media device - * @entity: The entity - */ -int __must_check media_device_register_entity(struct media_device *mdev, - struct media_entity *entity) -{ - struct media_entity_notify *notify, *next; - unsigned int i; - int ret; - - if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN || - entity->function == MEDIA_ENT_F_UNKNOWN) - dev_warn(mdev->dev, - "Entity type for entity %s was not initialized!\n", - entity->name); - - /* Warn if we apparently re-register an entity */ - WARN_ON(entity->graph_obj.mdev != NULL); - entity->graph_obj.mdev = mdev; - INIT_LIST_HEAD(&entity->links); - entity->num_links = 0; - entity->num_backlinks = 0; - - ret = ida_alloc_min(&mdev->entity_internal_idx, 1, GFP_KERNEL); - if (ret < 0) - return ret; - entity->internal_idx = ret; - - mutex_lock(&mdev->graph_mutex); - mdev->entity_internal_idx_max = - max(mdev->entity_internal_idx_max, entity->internal_idx); - - /* Initialize media_gobj embedded at the entity */ - media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj); - - /* Initialize objects at the pads */ - for (i = 0; i < entity->num_pads; i++) - media_gobj_create(mdev, MEDIA_GRAPH_PAD, - &entity->pads[i].graph_obj); - - /* invoke entity_notify callbacks */ - list_for_each_entry_safe(notify, next, &mdev->entity_notify, list) - notify->notify(entity, notify->notify_data); - - if (mdev->entity_internal_idx_max - >= mdev->pm_count_walk.ent_enum.idx_max) { - struct media_graph new = { .top = 0 }; - - /* - * Initialise the new graph walk before cleaning up - * the old one in order not to spoil the graph walk - * object of the media device if graph walk init fails. - */ - ret = media_graph_walk_init(&new, mdev); - if (ret) { - mutex_unlock(&mdev->graph_mutex); - return ret; - } - media_graph_walk_cleanup(&mdev->pm_count_walk); - mdev->pm_count_walk = new; - } - mutex_unlock(&mdev->graph_mutex); - - return 0; -} -EXPORT_SYMBOL_GPL(media_device_register_entity); - -static void __media_device_unregister_entity(struct media_entity *entity) -{ - struct media_device *mdev = entity->graph_obj.mdev; - struct media_link *link, *tmp; - struct media_interface *intf; - unsigned int i; - - ida_free(&mdev->entity_internal_idx, entity->internal_idx); - - /* Remove all interface links pointing to this entity */ - list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) { - list_for_each_entry_safe(link, tmp, &intf->links, list) { - if (link->entity == entity) - __media_remove_intf_link(link); - } - } - - /* Remove all data links that belong to this entity */ - __media_entity_remove_links(entity); - - /* Remove all pads that belong to this entity */ - for (i = 0; i < entity->num_pads; i++) - media_gobj_destroy(&entity->pads[i].graph_obj); - - /* Remove the entity */ - media_gobj_destroy(&entity->graph_obj); - - /* invoke entity_notify callbacks to handle entity removal?? */ - - entity->graph_obj.mdev = NULL; -} - -void media_device_unregister_entity(struct media_entity *entity) -{ - struct media_device *mdev = entity->graph_obj.mdev; - - if (mdev == NULL) - return; - - mutex_lock(&mdev->graph_mutex); - __media_device_unregister_entity(entity); - mutex_unlock(&mdev->graph_mutex); -} -EXPORT_SYMBOL_GPL(media_device_unregister_entity); - -/** - * media_device_init() - initialize a media device - * @mdev: The media device - * - * The caller is responsible for initializing the media device before - * registration. The following fields must be set: - * - * - dev must point to the parent device - * - model must be filled with the device model name - */ -void media_device_init(struct media_device *mdev) -{ - INIT_LIST_HEAD(&mdev->entities); - INIT_LIST_HEAD(&mdev->interfaces); - INIT_LIST_HEAD(&mdev->pads); - INIT_LIST_HEAD(&mdev->links); - INIT_LIST_HEAD(&mdev->entity_notify); - - mutex_init(&mdev->req_queue_mutex); - mutex_init(&mdev->graph_mutex); - ida_init(&mdev->entity_internal_idx); - - atomic_set(&mdev->request_id, 0); - - dev_dbg(mdev->dev, "Media device initialized\n"); -} -EXPORT_SYMBOL_GPL(media_device_init); - -void media_device_cleanup(struct media_device *mdev) -{ - ida_destroy(&mdev->entity_internal_idx); - mdev->entity_internal_idx_max = 0; - media_graph_walk_cleanup(&mdev->pm_count_walk); - mutex_destroy(&mdev->graph_mutex); - mutex_destroy(&mdev->req_queue_mutex); -} -EXPORT_SYMBOL_GPL(media_device_cleanup); - -int __must_check __media_device_register(struct media_device *mdev, - struct module *owner) -{ - struct media_devnode *devnode; - int ret; - - devnode = kzalloc(sizeof(*devnode), GFP_KERNEL); - if (!devnode) - return -ENOMEM; - - /* Register the device node. */ - mdev->devnode = devnode; - devnode->fops = &media_device_fops; - devnode->parent = mdev->dev; - devnode->release = media_device_release; - - /* Set version 0 to indicate user-space that the graph is static */ - mdev->topology_version = 0; - - ret = media_devnode_register(mdev, devnode, owner); - if (ret < 0) { - /* devnode free is handled in media_devnode_*() */ - mdev->devnode = NULL; - return ret; - } - - ret = device_create_file(&devnode->dev, &dev_attr_model); - if (ret < 0) { - /* devnode free is handled in media_devnode_*() */ - mdev->devnode = NULL; - media_devnode_unregister_prepare(devnode); - media_devnode_unregister(devnode); - return ret; - } - - dev_dbg(mdev->dev, "Media device registered\n"); - - return 0; -} -EXPORT_SYMBOL_GPL(__media_device_register); - -int __must_check media_device_register_entity_notify(struct media_device *mdev, - struct media_entity_notify *nptr) -{ - mutex_lock(&mdev->graph_mutex); - list_add_tail(&nptr->list, &mdev->entity_notify); - mutex_unlock(&mdev->graph_mutex); - return 0; -} -EXPORT_SYMBOL_GPL(media_device_register_entity_notify); - -/* - * Note: Should be called with mdev->lock held. - */ -static void __media_device_unregister_entity_notify(struct media_device *mdev, - struct media_entity_notify *nptr) -{ - list_del(&nptr->list); -} - -void media_device_unregister_entity_notify(struct media_device *mdev, - struct media_entity_notify *nptr) -{ - mutex_lock(&mdev->graph_mutex); - __media_device_unregister_entity_notify(mdev, nptr); - mutex_unlock(&mdev->graph_mutex); -} -EXPORT_SYMBOL_GPL(media_device_unregister_entity_notify); - -void media_device_unregister(struct media_device *mdev) -{ - struct media_entity *entity; - struct media_entity *next; - struct media_interface *intf, *tmp_intf; - struct media_entity_notify *notify, *nextp; - - if (mdev == NULL) - return; - - mutex_lock(&mdev->graph_mutex); - - /* Check if mdev was ever registered at all */ - if (!media_devnode_is_registered(mdev->devnode)) { - mutex_unlock(&mdev->graph_mutex); - return; - } - - /* Clear the devnode register bit to avoid races with media dev open */ - media_devnode_unregister_prepare(mdev->devnode); - - /* Remove all entities from the media device */ - list_for_each_entry_safe(entity, next, &mdev->entities, graph_obj.list) - __media_device_unregister_entity(entity); - - /* Remove all entity_notify callbacks from the media device */ - list_for_each_entry_safe(notify, nextp, &mdev->entity_notify, list) - __media_device_unregister_entity_notify(mdev, notify); - - /* Remove all interfaces from the media device */ - list_for_each_entry_safe(intf, tmp_intf, &mdev->interfaces, - graph_obj.list) { - /* - * Unlink the interface, but don't free it here; the - * module which created it is responsible for freeing - * it - */ - __media_remove_intf_links(intf); - media_gobj_destroy(&intf->graph_obj); - } - - mutex_unlock(&mdev->graph_mutex); - - dev_dbg(mdev->dev, "Media device unregistered\n"); - - device_remove_file(&mdev->devnode->dev, &dev_attr_model); - media_devnode_unregister(mdev->devnode); - /* devnode free is handled in media_devnode_*() */ - mdev->devnode = NULL; -} -EXPORT_SYMBOL_GPL(media_device_unregister); - -#if IS_ENABLED(CONFIG_PCI) -void media_device_pci_init(struct media_device *mdev, - struct pci_dev *pci_dev, - const char *name) -{ - mdev->dev = &pci_dev->dev; - - if (name) - strscpy(mdev->model, name, sizeof(mdev->model)); - else - strscpy(mdev->model, pci_name(pci_dev), sizeof(mdev->model)); - - sprintf(mdev->bus_info, "PCI:%s", pci_name(pci_dev)); - - mdev->hw_revision = (pci_dev->subsystem_vendor << 16) - | pci_dev->subsystem_device; - - media_device_init(mdev); -} -EXPORT_SYMBOL_GPL(media_device_pci_init); -#endif - -#if IS_ENABLED(CONFIG_USB) -void __media_device_usb_init(struct media_device *mdev, - struct usb_device *udev, - const char *board_name, - const char *driver_name) -{ - mdev->dev = &udev->dev; - - if (driver_name) - strscpy(mdev->driver_name, driver_name, - sizeof(mdev->driver_name)); - - if (board_name) - strscpy(mdev->model, board_name, sizeof(mdev->model)); - else if (udev->product) - strscpy(mdev->model, udev->product, sizeof(mdev->model)); - else - strscpy(mdev->model, "unknown model", sizeof(mdev->model)); - if (udev->serial) - strscpy(mdev->serial, udev->serial, sizeof(mdev->serial)); - usb_make_path(udev, mdev->bus_info, sizeof(mdev->bus_info)); - mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); - - media_device_init(mdev); -} -EXPORT_SYMBOL_GPL(__media_device_usb_init); -#endif - - -#endif /* CONFIG_MEDIA_CONTROLLER */ |