2 * Multimedia device API
4 * Copyright (C) 2010 Nokia Corporation
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 #ifndef __LINUX_MEDIA_H
24 #define __LINUX_MEDIA_H
26 #include <linux/ioctl.h>
27 #include <linux/types.h>
28 #include <linux/version.h>
30 #define MEDIA_API_VERSION KERNEL_VERSION(0, 1, 0)
32 struct media_device_info {
43 #define MEDIA_ENT_ID_FLAG_NEXT (1 << 31)
45 #define MEDIA_ENT_TYPE_SHIFT 16
46 #define MEDIA_ENT_TYPE_MASK 0x00ff0000
47 #define MEDIA_ENT_SUBTYPE_MASK 0x0000ffff
49 #define MEDIA_ENT_T_DEVNODE (1 << MEDIA_ENT_TYPE_SHIFT)
50 #define MEDIA_ENT_T_DEVNODE_V4L (MEDIA_ENT_T_DEVNODE + 1)
51 #define MEDIA_ENT_T_DEVNODE_FB (MEDIA_ENT_T_DEVNODE + 2)
52 #define MEDIA_ENT_T_DEVNODE_ALSA (MEDIA_ENT_T_DEVNODE + 3)
53 #define MEDIA_ENT_T_DEVNODE_DVB_FE (MEDIA_ENT_T_DEVNODE + 4)
54 #define MEDIA_ENT_T_DEVNODE_DVB_DEMUX (MEDIA_ENT_T_DEVNODE + 5)
55 #define MEDIA_ENT_T_DEVNODE_DVB_DVR (MEDIA_ENT_T_DEVNODE + 6)
56 #define MEDIA_ENT_T_DEVNODE_DVB_CA (MEDIA_ENT_T_DEVNODE + 7)
57 #define MEDIA_ENT_T_DEVNODE_DVB_NET (MEDIA_ENT_T_DEVNODE + 8)
59 /* Legacy symbol. Use it to avoid userspace compilation breakages */
60 #define MEDIA_ENT_T_DEVNODE_DVB MEDIA_ENT_T_DEVNODE_DVB_FE
62 #define MEDIA_ENT_T_V4L2_SUBDEV (2 << MEDIA_ENT_TYPE_SHIFT)
63 #define MEDIA_ENT_T_V4L2_SUBDEV_SENSOR (MEDIA_ENT_T_V4L2_SUBDEV + 1)
64 #define MEDIA_ENT_T_V4L2_SUBDEV_FLASH (MEDIA_ENT_T_V4L2_SUBDEV + 2)
65 #define MEDIA_ENT_T_V4L2_SUBDEV_LENS (MEDIA_ENT_T_V4L2_SUBDEV + 3)
66 /* A converter of analogue video to its digital representation. */
67 #define MEDIA_ENT_T_V4L2_SUBDEV_DECODER (MEDIA_ENT_T_V4L2_SUBDEV + 4)
69 #define MEDIA_ENT_T_V4L2_SUBDEV_TUNER (MEDIA_ENT_T_V4L2_SUBDEV + 5)
71 #define MEDIA_ENT_FL_DEFAULT (1 << 0)
73 struct media_entity_desc {
86 /* Node specifications */
94 * TODO: this shouldn't have been added without
95 * actual drivers that use this. When the first real driver
96 * appears that sets this information, special attention
97 * should be given whether this information is 1) enough, and
98 * 2) can deal with udev rules that rename devices. The struct
99 * dev would not be sufficient for this since that does not
100 * contain the subdevice information. In addition, struct dev
101 * can only refer to a single device, and not to multiple (e.g.
102 * pcm and mixer devices).
104 * So for now mark this as a to do.
115 * DEPRECATED: previous node specifications. Kept just to
116 * avoid breaking compilation, but media_entity_desc.dev
117 * should be used instead. In particular, alsa and dvb
118 * fields below are wrong: for all devnodes, there should
119 * be just major/minor inside the struct, as this is enough
120 * to represent any devnode, no matter what type.
133 /* Sub-device specifications */
134 /* Nothing needed yet */
139 #define MEDIA_PAD_FL_SINK (1 << 0)
140 #define MEDIA_PAD_FL_SOURCE (1 << 1)
141 #define MEDIA_PAD_FL_MUST_CONNECT (1 << 2)
143 struct media_pad_desc {
144 __u32 entity; /* entity ID */
145 __u16 index; /* pad index */
146 __u32 flags; /* pad flags */
150 #define MEDIA_LNK_FL_ENABLED (1 << 0)
151 #define MEDIA_LNK_FL_IMMUTABLE (1 << 1)
152 #define MEDIA_LNK_FL_DYNAMIC (1 << 2)
154 struct media_link_desc {
155 struct media_pad_desc source;
156 struct media_pad_desc sink;
161 struct media_links_enum {
163 /* Should have enough room for pads elements */
164 struct media_pad_desc __user *pads;
165 /* Should have enough room for links elements */
166 struct media_link_desc __user *links;
170 #define MEDIA_IOC_DEVICE_INFO _IOWR('|', 0x00, struct media_device_info)
171 #define MEDIA_IOC_ENUM_ENTITIES _IOWR('|', 0x01, struct media_entity_desc)
172 #define MEDIA_IOC_ENUM_LINKS _IOWR('|', 0x02, struct media_links_enum)
173 #define MEDIA_IOC_SETUP_LINK _IOWR('|', 0x03, struct media_link_desc)
175 #endif /* __LINUX_MEDIA_H */