176fb0d108
The media_device structure abstracts functions common to all kind of media devices (v4l2, dvb, alsa, ...). It manages media entities and offers a userspace API to discover and configure the media device internal topology. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
/*
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* Media device
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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 _MEDIA_DEVICE_H
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#define _MEDIA_DEVICE_H
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#include <linux/device.h>
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#include <linux/list.h>
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#include <media/media-devnode.h>
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/**
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* struct media_device - Media device
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* @dev: Parent device
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* @devnode: Media device node
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* @model: Device model name
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* @serial: Device serial number (optional)
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* @bus_info: Unique and stable device location identifier
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* @hw_revision: Hardware device revision
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* @driver_version: Device driver version
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*
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* This structure represents an abstract high-level media device. It allows easy
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* access to entities and provides basic media device-level support. The
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* structure can be allocated directly or embedded in a larger structure.
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*
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* The parent @dev is a physical device. It must be set before registering the
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* media device.
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*
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* @model is a descriptive model name exported through sysfs. It doesn't have to
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* be unique.
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*/
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struct media_device {
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/* dev->driver_data points to this struct. */
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struct device *dev;
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struct media_devnode devnode;
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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 hw_revision;
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u32 driver_version;
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};
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/* media_devnode to media_device */
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#define to_media_device(node) container_of(node, struct media_device, devnode)
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int __must_check media_device_register(struct media_device *mdev);
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void media_device_unregister(struct media_device *mdev);
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#endif
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