| /* |
| * Media device |
| * |
| * Copyright (C) 2010 Nokia Corporation |
| * |
| * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com> |
| * Sakari Ailus <sakari.ailus@maxwell.research.nokia.com> |
| * |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #ifndef _MEDIA_DEVICE_H |
| #define _MEDIA_DEVICE_H |
| |
| #include <linux/device.h> |
| #include <linux/list.h> |
| #include <linux/mutex.h> |
| #include <linux/spinlock.h> |
| |
| #include <media/media-devnode.h> |
| #include <media/media-entity.h> |
| |
| /** |
| * struct media_device - Media device |
| * @dev: Parent device |
| * @devnode: Media device node |
| * @model: Device model name |
| * @serial: Device serial number (optional) |
| * @bus_info: Unique and stable device location identifier |
| * @hw_revision: Hardware device revision |
| * @driver_version: Device driver version |
| * @entity_id: ID of the next entity to be registered |
| * @entities: List of registered entities |
| * @lock: Entities list lock |
| * @graph_mutex: Entities graph operation lock |
| * |
| * This structure represents an abstract high-level media device. It allows easy |
| * access to entities and provides basic media device-level support. The |
| * structure can be allocated directly or embedded in a larger structure. |
| * |
| * The parent @dev is a physical device. It must be set before registering the |
| * media device. |
| * |
| * @model is a descriptive model name exported through sysfs. It doesn't have to |
| * be unique. |
| */ |
| struct media_device { |
| /* dev->driver_data points to this struct. */ |
| struct device *dev; |
| struct media_devnode devnode; |
| |
| char model[32]; |
| char serial[40]; |
| char bus_info[32]; |
| u32 hw_revision; |
| u32 driver_version; |
| |
| u32 entity_id; |
| struct list_head entities; |
| |
| /* Protects the entities list */ |
| spinlock_t lock; |
| /* Serializes graph operations. */ |
| struct mutex graph_mutex; |
| |
| int (*link_notify)(struct media_pad *source, |
| struct media_pad *sink, u32 flags); |
| }; |
| |
| /* media_devnode to media_device */ |
| #define to_media_device(node) container_of(node, struct media_device, devnode) |
| |
| int __must_check media_device_register(struct media_device *mdev); |
| void media_device_unregister(struct media_device *mdev); |
| |
| int __must_check media_device_register_entity(struct media_device *mdev, |
| struct media_entity *entity); |
| void media_device_unregister_entity(struct media_entity *entity); |
| |
| /* Iterate over all entities. */ |
| #define media_device_for_each_entity(entity, mdev) \ |
| list_for_each_entry(entity, &(mdev)->entities, list) |
| |
| #endif |