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176fb0d1 LP |
1 | /* |
2 | * Media device | |
3 | * | |
4 | * Copyright (C) 2010 Nokia Corporation | |
5 | * | |
6 | * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com> | |
7 | * Sakari Ailus <sakari.ailus@iki.fi> | |
8 | * | |
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. | |
12 | * | |
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. | |
17 | * | |
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 | |
21 | */ | |
22 | ||
23 | #ifndef _MEDIA_DEVICE_H | |
24 | #define _MEDIA_DEVICE_H | |
25 | ||
26 | #include <linux/device.h> | |
27 | #include <linux/list.h> | |
503c3d82 | 28 | #include <linux/mutex.h> |
53e269c1 | 29 | #include <linux/spinlock.h> |
176fb0d1 LP |
30 | |
31 | #include <media/media-devnode.h> | |
53e269c1 | 32 | #include <media/media-entity.h> |
176fb0d1 LP |
33 | |
34 | /** | |
35 | * struct media_device - Media device | |
36 | * @dev: Parent device | |
37 | * @devnode: Media device node | |
38 | * @model: Device model name | |
39 | * @serial: Device serial number (optional) | |
40 | * @bus_info: Unique and stable device location identifier | |
41 | * @hw_revision: Hardware device revision | |
42 | * @driver_version: Device driver version | |
53e269c1 LP |
43 | * @entity_id: ID of the next entity to be registered |
44 | * @entities: List of registered entities | |
45 | * @lock: Entities list lock | |
503c3d82 | 46 | * @graph_mutex: Entities graph operation lock |
176fb0d1 LP |
47 | * |
48 | * This structure represents an abstract high-level media device. It allows easy | |
49 | * access to entities and provides basic media device-level support. The | |
50 | * structure can be allocated directly or embedded in a larger structure. | |
51 | * | |
52 | * The parent @dev is a physical device. It must be set before registering the | |
53 | * media device. | |
54 | * | |
55 | * @model is a descriptive model name exported through sysfs. It doesn't have to | |
56 | * be unique. | |
57 | */ | |
58 | struct media_device { | |
59 | /* dev->driver_data points to this struct. */ | |
60 | struct device *dev; | |
61 | struct media_devnode devnode; | |
62 | ||
63 | char model[32]; | |
64 | char serial[40]; | |
65 | char bus_info[32]; | |
66 | u32 hw_revision; | |
67 | u32 driver_version; | |
53e269c1 LP |
68 | |
69 | u32 entity_id; | |
70 | struct list_head entities; | |
71 | ||
72 | /* Protects the entities list */ | |
73 | spinlock_t lock; | |
503c3d82 LP |
74 | /* Serializes graph operations. */ |
75 | struct mutex graph_mutex; | |
97548ed4 LP |
76 | |
77 | int (*link_notify)(struct media_pad *source, | |
78 | struct media_pad *sink, u32 flags); | |
176fb0d1 LP |
79 | }; |
80 | ||
81 | /* media_devnode to media_device */ | |
82 | #define to_media_device(node) container_of(node, struct media_device, devnode) | |
83 | ||
84 | int __must_check media_device_register(struct media_device *mdev); | |
85 | void media_device_unregister(struct media_device *mdev); | |
86 | ||
53e269c1 LP |
87 | int __must_check media_device_register_entity(struct media_device *mdev, |
88 | struct media_entity *entity); | |
89 | void media_device_unregister_entity(struct media_entity *entity); | |
90 | ||
91 | /* Iterate over all entities. */ | |
92 | #define media_device_for_each_entity(entity, mdev) \ | |
93 | list_for_each_entry(entity, &(mdev)->entities, list) | |
94 | ||
176fb0d1 | 95 | #endif |