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1/*
2 *
3 * V 4 L 2 D R I V E R H E L P E R A P I
4 *
5 * Moved from videodev2.h
6 *
7 * Some commonly needed functions for drivers (v4l2-common.o module)
8 */
9#ifndef _V4L2_DEV_H
10#define _V4L2_DEV_H
11
12#define OBSOLETE_DEVDATA 1 /* to be removed soon */
13
14#include <linux/poll.h>
15#include <linux/fs.h>
16#include <linux/device.h>
17#include <linux/mutex.h>
18#include <linux/compiler.h> /* need __user */
19#include <linux/videodev2.h>
20
21#define VIDEO_MAJOR 81
22/* Minor device allocation */
23#define MINOR_VFL_TYPE_GRABBER_MIN 0
24#define MINOR_VFL_TYPE_GRABBER_MAX 63
25#define MINOR_VFL_TYPE_RADIO_MIN 64
26#define MINOR_VFL_TYPE_RADIO_MAX 127
27#define MINOR_VFL_TYPE_VTX_MIN 192
28#define MINOR_VFL_TYPE_VTX_MAX 223
29#define MINOR_VFL_TYPE_VBI_MIN 224
30#define MINOR_VFL_TYPE_VBI_MAX 255
31
32#define VFL_TYPE_GRABBER 0
33#define VFL_TYPE_VBI 1
34#define VFL_TYPE_RADIO 2
35#define VFL_TYPE_VTX 3
36
37struct v4l2_ioctl_callbacks;
38
39/*
40 * Newer version of video_device, handled by videodev2.c
41 * This version moves redundant code from video device code to
42 * the common handler
43 */
44
45struct video_device
46{
47 /* device ops */
48 const struct file_operations *fops;
49
50 /* sysfs */
51 struct device dev; /* v4l device */
52 struct device *parent; /* device parent */
53
54 /* device info */
55 char name[32];
56 int vfl_type;
57 int minor;
58 /* attribute to differentiate multiple indices on one physical device */
59 int index;
60
61 int debug; /* Activates debug level*/
62
63 /* Video standard vars */
64 v4l2_std_id tvnorms; /* Supported tv norms */
65 v4l2_std_id current_norm; /* Current tvnorm */
66
67 /* callbacks */
68 void (*release)(struct video_device *vfd);
69
70 /* ioctl callbacks */
71 const struct v4l2_ioctl_ops *ioctl_ops;
72
73#ifdef OBSOLETE_DEVDATA /* to be removed soon */
74 /* dev->driver_data will be used instead some day.
75 * Use the video_{get|set}_drvdata() helper functions,
76 * so the switch over will be transparent for you.
77 * Or use {pci|usb}_{get|set}_drvdata() directly. */
78 void *priv;
79#endif
80
81 /* for videodev.c internal usage -- please don't touch */
82 int users; /* video_exclusive_{open|close} ... */
83 struct mutex lock; /* ... helper function uses these */
84};
85
86/* Class-dev to video-device */
87#define to_video_device(cd) container_of(cd, struct video_device, dev)
88
89/* Version 2 functions */
90extern int video_register_device(struct video_device *vfd, int type, int nr);
91int video_register_device_index(struct video_device *vfd, int type, int nr,
92 int index);
93void video_unregister_device(struct video_device *);
94
95/* helper functions to alloc / release struct video_device, the
96 later can be used for video_device->release() */
97struct video_device *video_device_alloc(void);
98void video_device_release(struct video_device *vfd);
99
100#ifdef OBSOLETE_DEVDATA /* to be removed soon */
101/* helper functions to access driver private data. */
102static inline void *video_get_drvdata(struct video_device *dev)
103{
104 return dev->priv;
105}
106
107static inline void video_set_drvdata(struct video_device *dev, void *data)
108{
109 dev->priv = data;
110}
111
112/* Obsolete stuff - Still needed for radio devices and obsolete drivers */
113extern struct video_device* video_devdata(struct file*);
114extern int video_exclusive_open(struct inode *inode, struct file *file);
115extern int video_exclusive_release(struct inode *inode, struct file *file);
116#endif
117
118#endif /* _V4L2_DEV_H */