Edit File: media-device.h
/* * 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. * * 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/list.h> #include <linux/mutex.h> #include <linux/spinlock.h> #include <media/media-devnode.h> #include <media/media-entity.h> struct device; /** * 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