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fa17b46a6a
As we'll be removing entity subtypes from the Kernel, we need to provide a way for drivers and core to check if a given entity is represented by a V4L2 subdev or if it is an V4L2 I/O entity (typically with DMA). Drivers that create entities that don't belong to any defined subdev category should use MEDIA_ENT_T_V4L2_SUBDEV_UNKNOWN. Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
237 lines
7.2 KiB
C
237 lines
7.2 KiB
C
/*
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* Multimedia device API
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*
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* Copyright (C) 2010 Nokia Corporation
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*
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* Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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* Sakari Ailus <sakari.ailus@iki.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __LINUX_MEDIA_H
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#define __LINUX_MEDIA_H
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#include <linux/ioctl.h>
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#include <linux/types.h>
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#include <linux/version.h>
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#define MEDIA_API_VERSION KERNEL_VERSION(0, 1, 0)
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struct media_device_info {
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char driver[16];
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char model[32];
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char serial[40];
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char bus_info[32];
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__u32 media_version;
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__u32 hw_revision;
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__u32 driver_version;
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__u32 reserved[31];
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};
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#define MEDIA_ENT_ID_FLAG_NEXT (1 << 31)
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/*
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* Base numbers for entity types
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*
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* Please notice that the huge gap of 16 bits for each base is overkill!
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* 8 bits is more than enough to avoid starving entity types for each
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* subsystem.
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*
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* However, It is kept this way just to avoid binary breakages with the
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* namespace provided on legacy versions of this header.
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*/
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#define MEDIA_ENT_T_DVB_BASE 0x00000000
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#define MEDIA_ENT_T_V4L2_BASE 0x00010000
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#define MEDIA_ENT_T_V4L2_SUBDEV_BASE 0x00020000
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/*
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* V4L2 entities - Those are used for DMA (mmap/DMABUF) and
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* read()/write() data I/O associated with the V4L2 devnodes.
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*/
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#define MEDIA_ENT_T_V4L2_VIDEO (MEDIA_ENT_T_V4L2_BASE + 1)
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/*
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* Please notice that numbers between MEDIA_ENT_T_V4L2_BASE + 2 and
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* MEDIA_ENT_T_V4L2_BASE + 4 can't be used, as those values used
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* to be declared for FB, ALSA and DVB entities.
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* As those values were never actually used in practice, we're just
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* adding them as backward compatibility macros and keeping the
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* numberspace clean here. This way, we avoid breaking compilation,
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* in the case of having some userspace application using the old
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* symbols.
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*/
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#define MEDIA_ENT_T_V4L2_VBI (MEDIA_ENT_T_V4L2_BASE + 5)
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#define MEDIA_ENT_T_V4L2_SWRADIO (MEDIA_ENT_T_V4L2_BASE + 6)
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/* V4L2 Sub-device entities */
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#define MEDIA_ENT_T_V4L2_SUBDEV_UNKNOWN MEDIA_ENT_T_V4L2_SUBDEV_BASE
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#define MEDIA_ENT_T_V4L2_SUBDEV_SENSOR (MEDIA_ENT_T_V4L2_SUBDEV_BASE + 1)
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#define MEDIA_ENT_T_V4L2_SUBDEV_FLASH (MEDIA_ENT_T_V4L2_SUBDEV_BASE + 2)
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#define MEDIA_ENT_T_V4L2_SUBDEV_LENS (MEDIA_ENT_T_V4L2_SUBDEV_BASE + 3)
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/* A converter of analogue video to its digital representation. */
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#define MEDIA_ENT_T_V4L2_SUBDEV_DECODER (MEDIA_ENT_T_V4L2_SUBDEV_BASE + 4)
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/* Tuner entity is actually both V4L2 and DVB subdev */
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#define MEDIA_ENT_T_V4L2_SUBDEV_TUNER (MEDIA_ENT_T_V4L2_SUBDEV_BASE + 5)
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/* DVB entities */
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#define MEDIA_ENT_T_DVB_DEMOD (MEDIA_ENT_T_DVB_BASE + 1)
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#define MEDIA_ENT_T_DVB_DEMUX (MEDIA_ENT_T_DVB_BASE + 2)
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#define MEDIA_ENT_T_DVB_TSOUT (MEDIA_ENT_T_DVB_BASE + 3)
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#define MEDIA_ENT_T_DVB_CA (MEDIA_ENT_T_DVB_BASE + 4)
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#define MEDIA_ENT_T_DVB_NET_DECAP (MEDIA_ENT_T_DVB_BASE + 5)
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/* Legacy symbols used to avoid userspace compilation breakages */
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#define MEDIA_ENT_TYPE_SHIFT 16
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#define MEDIA_ENT_TYPE_MASK 0x00ff0000
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#define MEDIA_ENT_SUBTYPE_MASK 0x0000ffff
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#define MEDIA_ENT_T_DEVNODE MEDIA_ENT_T_V4L2_BASE
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#define MEDIA_ENT_T_V4L2_SUBDEV MEDIA_ENT_T_V4L2_SUBDEV_BASE
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#define MEDIA_ENT_T_DEVNODE_V4L MEDIA_ENT_T_V4L2_VIDEO
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#define MEDIA_ENT_T_DEVNODE_FB (MEDIA_ENT_T_DEVNODE + 2)
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#define MEDIA_ENT_T_DEVNODE_ALSA (MEDIA_ENT_T_DEVNODE + 3)
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#define MEDIA_ENT_T_DEVNODE_DVB (MEDIA_ENT_T_DEVNODE + 4)
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/* Entity types */
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#define MEDIA_ENT_FL_DEFAULT (1 << 0)
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struct media_entity_desc {
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__u32 id;
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char name[32];
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__u32 type;
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__u32 revision;
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__u32 flags;
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__u32 group_id;
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__u16 pads;
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__u16 links;
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__u32 reserved[4];
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union {
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/* Node specifications */
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struct {
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__u32 major;
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__u32 minor;
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} dev;
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#if 1
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/*
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* TODO: this shouldn't have been added without
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* actual drivers that use this. When the first real driver
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* appears that sets this information, special attention
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* should be given whether this information is 1) enough, and
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* 2) can deal with udev rules that rename devices. The struct
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* dev would not be sufficient for this since that does not
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* contain the subdevice information. In addition, struct dev
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* can only refer to a single device, and not to multiple (e.g.
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* pcm and mixer devices).
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*
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* So for now mark this as a to do.
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*/
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struct {
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__u32 card;
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__u32 device;
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__u32 subdevice;
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} alsa;
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#endif
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#if 1
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/*
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* DEPRECATED: previous node specifications. Kept just to
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* avoid breaking compilation, but media_entity_desc.dev
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* should be used instead. In particular, alsa and dvb
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* fields below are wrong: for all devnodes, there should
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* be just major/minor inside the struct, as this is enough
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* to represent any devnode, no matter what type.
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*/
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struct {
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__u32 major;
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__u32 minor;
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} v4l;
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struct {
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__u32 major;
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__u32 minor;
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} fb;
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int dvb;
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#endif
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/* Sub-device specifications */
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/* Nothing needed yet */
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__u8 raw[184];
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};
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};
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#define MEDIA_PAD_FL_SINK (1 << 0)
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#define MEDIA_PAD_FL_SOURCE (1 << 1)
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#define MEDIA_PAD_FL_MUST_CONNECT (1 << 2)
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struct media_pad_desc {
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__u32 entity; /* entity ID */
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__u16 index; /* pad index */
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__u32 flags; /* pad flags */
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__u32 reserved[2];
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};
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#define MEDIA_LNK_FL_ENABLED (1 << 0)
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#define MEDIA_LNK_FL_IMMUTABLE (1 << 1)
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#define MEDIA_LNK_FL_DYNAMIC (1 << 2)
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struct media_link_desc {
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struct media_pad_desc source;
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struct media_pad_desc sink;
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__u32 flags;
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__u32 reserved[2];
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};
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struct media_links_enum {
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__u32 entity;
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/* Should have enough room for pads elements */
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struct media_pad_desc __user *pads;
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/* Should have enough room for links elements */
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struct media_link_desc __user *links;
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__u32 reserved[4];
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};
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/* Interface type ranges */
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#define MEDIA_INTF_T_DVB_BASE 0x00000100
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#define MEDIA_INTF_T_V4L_BASE 0x00000200
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/* Interface types */
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#define MEDIA_INTF_T_DVB_FE (MEDIA_INTF_T_DVB_BASE)
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#define MEDIA_INTF_T_DVB_DEMUX (MEDIA_INTF_T_DVB_BASE + 1)
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#define MEDIA_INTF_T_DVB_DVR (MEDIA_INTF_T_DVB_BASE + 2)
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#define MEDIA_INTF_T_DVB_CA (MEDIA_INTF_T_DVB_BASE + 3)
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#define MEDIA_INTF_T_DVB_NET (MEDIA_INTF_T_DVB_BASE + 4)
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#define MEDIA_INTF_T_V4L_VIDEO (MEDIA_INTF_T_V4L_BASE)
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#define MEDIA_INTF_T_V4L_VBI (MEDIA_INTF_T_V4L_BASE + 1)
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#define MEDIA_INTF_T_V4L_RADIO (MEDIA_INTF_T_V4L_BASE + 2)
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#define MEDIA_INTF_T_V4L_SUBDEV (MEDIA_INTF_T_V4L_BASE + 3)
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#define MEDIA_INTF_T_V4L_SWRADIO (MEDIA_INTF_T_V4L_BASE + 4)
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/* TBD: declare the structs needed for the new G_TOPOLOGY ioctl */
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#define MEDIA_IOC_DEVICE_INFO _IOWR('|', 0x00, struct media_device_info)
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#define MEDIA_IOC_ENUM_ENTITIES _IOWR('|', 0x01, struct media_entity_desc)
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#define MEDIA_IOC_ENUM_LINKS _IOWR('|', 0x02, struct media_links_enum)
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#define MEDIA_IOC_SETUP_LINK _IOWR('|', 0x03, struct media_link_desc)
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#endif /* __LINUX_MEDIA_H */
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