mirror of
https://github.com/drasko/open-ameba.git
synced 2024-11-24 15:04:18 +00:00
105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
|
/*
|
||
|
|
* Media device node
|
||
|
|
*
|
||
|
|
* 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
|
||
|
|
*
|
||
|
|
* --
|
||
|
|
*
|
||
|
|
* Common functions for media-related drivers to register and unregister media
|
||
|
|
* device nodes.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _MEDIA_DEVNODE_H
|
||
|
|
#define _MEDIA_DEVNODE_H
|
||
|
|
|
||
|
|
#if 0
|
||
|
|
#include <linux/poll.h>
|
||
|
|
#include <linux/fs.h>
|
||
|
|
#include <linux/device.h>
|
||
|
|
#include <linux/cdev.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Flag to mark the media_devnode struct as registered. Drivers must not touch
|
||
|
|
* this flag directly, it will be set and cleared by media_devnode_register and
|
||
|
|
* media_devnode_unregister.
|
||
|
|
*/
|
||
|
|
#define MEDIA_FLAG_REGISTERED 0
|
||
|
|
|
||
|
|
struct media_file_operations {
|
||
|
|
//struct module *owner;
|
||
|
|
#if 0
|
||
|
|
ssize_t (*read) (char __user *, size_t, loff_t *);
|
||
|
|
ssize_t (*write) (const char __user *, size_t, loff_t *);
|
||
|
|
unsigned int (*poll) (struct poll_table_struct *);
|
||
|
|
#endif
|
||
|
|
long (*ioctl) (unsigned int, unsigned long);
|
||
|
|
long (*compat_ioctl) (unsigned int, unsigned long);
|
||
|
|
int (*open) ();
|
||
|
|
int (*release) ();
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct media_devnode - Media device node
|
||
|
|
* @parent: parent device
|
||
|
|
* @minor: device node minor number
|
||
|
|
* @flags: flags, combination of the MEDIA_FLAG_* constants
|
||
|
|
*
|
||
|
|
* This structure represents a media-related device node.
|
||
|
|
*
|
||
|
|
* The @parent is a physical device. It must be set by core or device drivers
|
||
|
|
* before registering the node.
|
||
|
|
*/
|
||
|
|
struct media_devnode {
|
||
|
|
/* device ops */
|
||
|
|
const struct media_file_operations *fops;
|
||
|
|
|
||
|
|
/* sysfs */
|
||
|
|
#if 0
|
||
|
|
struct device dev; /* media device */
|
||
|
|
struct cdev cdev; /* character device */
|
||
|
|
struct device *parent; /* device parent */
|
||
|
|
#endif
|
||
|
|
/* device info */
|
||
|
|
int minor;
|
||
|
|
unsigned long flags; /* Use bitops to access flags */
|
||
|
|
|
||
|
|
/* callbacks */
|
||
|
|
void (*release)(struct media_devnode *mdev);
|
||
|
|
};
|
||
|
|
|
||
|
|
/* dev to media_devnode */
|
||
|
|
#define to_media_devnode(minor) container_of(minor, struct media_devnode, dev)
|
||
|
|
|
||
|
|
int media_devnode_register(struct media_devnode *mdev);
|
||
|
|
void media_devnode_unregister(struct media_devnode *mdev);
|
||
|
|
#if 0
|
||
|
|
static inline struct media_devnode *media_devnode_data()
|
||
|
|
{
|
||
|
|
return private_data;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
static inline int media_devnode_is_registered(struct media_devnode *mdev)
|
||
|
|
{
|
||
|
|
return test_bit(MEDIA_FLAG_REGISTERED, &mdev->flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* _MEDIA_DEVNODE_H */
|