/*
*
* V 4 L 2 D R I V E R H E L P E R A P I
*
* Moved from videodev2.h
*
* Some commonly needed functions for drivers (v4l2-common.o module)
*/
#ifndef _V4L2_DEV_H
#define _V4L2_DEV_H
#define OBSOLETE_DEVDATA 1 /* to be removed soon */
#include <linux/poll.h>
#include <linux/fs.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/compiler.h> /* need __user */
#ifdef CONFIG_VIDEO_V4L1_COMPAT
#include <linux/videodev.h>
#else
#include <linux/videodev2.h>
#endif
#define VIDEO_MAJOR 81
/* Minor device allocation */
#define MINOR_VFL_TYPE_GRABBER_MIN 0
#define MINOR_VFL_TYPE_GRABBER_MAX 63
#define MINOR_VFL_TYPE_RADIO_MIN 64
#define MINOR_VFL_TYPE_RADIO_MAX 127
#define MINOR_VFL_TYPE_VTX_MIN 192
#define MINOR_VFL_TYPE_VTX_MAX 223
#define MINOR_VFL_TYPE_VBI_MIN 224
#define MINOR_VFL_TYPE_VBI_MAX 255
#define VFL_TYPE_GRABBER 0
#define VFL_TYPE_VBI 1
#define VFL_TYPE_RADIO 2
#define VFL_TYPE_VTX 3
struct v4l2_ioctl_callbacks;
/*
* Newer version of video_device, handled by videodev2.c
* This version moves redundant code from video device code to
* the common handler
*/
struct video_device
{
/* device ops */
const struct file_operations *fops;
/* sysfs */
struct device dev; /* v4l device */
struct device *parent; /* device parent */
/* device info */
char name[32];
int type; /* v4l1 */
int type2; /* v4l2 */
int minor;
/* attribute to diferentiate multiple indexs on one physical device */
int index;
int debug; /* Activates debug level*/
/* Video standard vars */
v4l2_std_id tvnorms; /* Supported tv norms */
v4l2_std_id current_norm; /* Current tvnorm */
/* callbacks */
void (*release)(struct video_device *vfd);
/* ioctl callbacks */
const struct v4l2_ioctl_ops *ioctl_ops;
#ifdef OBSOLETE_DEVDATA /* to be removed soon */
/* dev->driver_data will be used instead some day.
* Use the video_{get|set}_drvdata() helper functions,
* so the switch over will be transparent for you.
* Or use {pci|usb}_{get|set}_drvdata() directly. */
void *priv;
#endif
/* for videodev.c intenal usage -- please don't touch */
int users; /* video_exclusive_{open|close} ... */
struct mutex lock; /* ... helper function uses these */
};
/* Class-dev to video-device */
#define to_video_device(cd) container_of(cd, struct video_device, dev)
/* Version 2 functions */
extern int video_register_device(struct video_device *vfd, int type, int nr);
int video_register_device_index(struct video_device *vfd, int type, int nr,
int index);
void video_unregister_device(struct video_device *);
/* helper functions to alloc / release struct video_device, the
later can be used for video_device->release() */
struct video_device *video_device_alloc(void);
void video_device_release(struct video_device *vfd);
#ifdef CONFIG_VIDEO_V4L1_COMPAT
#include <linux/mm.h>
static inline int __must_check
video_device_create_file(struct video_device *vfd,
struct device_attribute *attr)
{
int ret = device_create_file(&vfd->dev, attr);
if (ret < 0)
printk(KERN_WARNING "%s error: %d\n", __func__, ret);
return ret;
}
static inline void
video_device_remove_file(struct video_device *vfd,
struct device_attribute *attr)
{
device_remove_file(&vfd->dev, attr);
}
#endif /* CONFIG_VIDEO_V4L1_COMPAT */
#ifdef OBSOLETE_DEVDATA /* to be removed soon */
/* helper functions to access driver private data. */
static inline void *video_get_drvdata(struct video_device *dev)
{
return dev->priv;
}
static inline void video_set_drvdata(struct video_device *dev, void *data)
{
dev->priv = data;
}
/* Obsolete stuff - Still needed for radio devices and obsolete drivers */
extern struct video_device* video_devdata(struct file*);
extern int video_exclusive_open(struct inode *inode, struct file *file);
extern int video_exclusive_release(struct inode *inode, struct file *file);
#endif
#endif /* _V4L2_DEV_H */
