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