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9#ifndef _V4L2_DEV_H
10#define _V4L2_DEV_H
11
12#include <linux/poll.h>
13#include <linux/fs.h>
14#include <linux/device.h>
15#include <linux/cdev.h>
16#include <linux/mutex.h>
17#include <linux/videodev2.h>
18
19#define VIDEO_MAJOR 81
20
21#define VFL_TYPE_GRABBER 0
22#define VFL_TYPE_VBI 1
23#define VFL_TYPE_RADIO 2
24#define VFL_TYPE_VTX 3
25#define VFL_TYPE_MAX 4
26
27struct v4l2_ioctl_callbacks;
28struct video_device;
29struct v4l2_device;
30
31
32
33
34#define V4L2_FL_UNREGISTERED (0)
35
36struct v4l2_file_operations {
37 struct module *owner;
38 ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
39 ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
40 unsigned int (*poll) (struct file *, struct poll_table_struct *);
41 long (*ioctl) (struct file *, unsigned int, unsigned long);
42 long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
43 unsigned long (*get_unmapped_area) (struct file *, unsigned long,
44 unsigned long, unsigned long, unsigned long);
45 int (*mmap) (struct file *, struct vm_area_struct *);
46 int (*open) (struct file *);
47 int (*release) (struct file *);
48};
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54
55
56struct video_device
57{
58
59 const struct v4l2_file_operations *fops;
60
61
62 struct device dev;
63 struct cdev *cdev;
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65
66 struct device *parent;
67 struct v4l2_device *v4l2_dev;
68
69
70 char name[32];
71 int vfl_type;
72
73 int minor;
74 u16 num;
75
76 unsigned long flags;
77
78 int index;
79
80 int debug;
81
82
83 v4l2_std_id tvnorms;
84 v4l2_std_id current_norm;
85
86
87 void (*release)(struct video_device *vdev);
88
89
90 const struct v4l2_ioctl_ops *ioctl_ops;
91};
92
93
94#define to_video_device(cd) container_of(cd, struct video_device, dev)
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101
102int __must_check video_register_device(struct video_device *vdev, int type, int nr);
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104
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106int __must_check video_register_device_no_warn(struct video_device *vdev, int type, int nr);
107
108
109
110void video_unregister_device(struct video_device *vdev);
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112
113
114struct video_device * __must_check video_device_alloc(void);
115
116
117void video_device_release(struct video_device *vdev);
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121
122void video_device_release_empty(struct video_device *vdev);
123
124
125static inline void *video_get_drvdata(struct video_device *vdev)
126{
127 return dev_get_drvdata(&vdev->dev);
128}
129
130static inline void video_set_drvdata(struct video_device *vdev, void *data)
131{
132 dev_set_drvdata(&vdev->dev, data);
133}
134
135struct video_device *video_devdata(struct file *file);
136
137
138
139static inline void *video_drvdata(struct file *file)
140{
141 return video_get_drvdata(video_devdata(file));
142}
143
144static inline int video_is_unregistered(struct video_device *vdev)
145{
146 return test_bit(V4L2_FL_UNREGISTERED, &vdev->flags);
147}
148
149#endif
150