This source file includes following definitions.
- video_register_device
- video_register_device_no_warn
- v4l2_disable_ioctl_locking
- v4l2_disable_ioctl
- video_get_drvdata
- video_set_drvdata
- video_drvdata
- video_device_node_name
- video_is_registered
#ifndef _V4L2_DEV_H
#define _V4L2_DEV_H
#include <linux/poll.h>
#include <linux/fs.h>
#include <linux/device.h>
#include <linux/cdev.h>
#include <linux/mutex.h>
#include <linux/videodev2.h>
#include <media/media-entity.h>
#define VIDEO_MAJOR 81
#define VFL_TYPE_GRABBER 0
#define VFL_TYPE_VBI 1
#define VFL_TYPE_RADIO 2
#define VFL_TYPE_SUBDEV 3
#define VFL_TYPE_SDR 4
#define VFL_TYPE_MAX 5
#define VFL_DIR_RX 0
#define VFL_DIR_TX 1
#define VFL_DIR_M2M 2
struct v4l2_ioctl_callbacks;
struct video_device;
struct v4l2_device;
struct v4l2_ctrl_handler;
#define V4L2_FL_REGISTERED (0)
#define V4L2_FL_USES_V4L2_FH (1)
struct v4l2_prio_state {
atomic_t prios[4];
};
void v4l2_prio_init(struct v4l2_prio_state *global);
int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local,
enum v4l2_priority new);
void v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local);
void v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority local);
enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global);
int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority local);
struct v4l2_file_operations {
struct module *owner;
ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
unsigned int (*poll) (struct file *, struct poll_table_struct *);
long (*ioctl) (struct file *, unsigned int, unsigned long);
long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
#ifdef CONFIG_COMPAT
long (*compat_ioctl32) (struct file *, unsigned int, unsigned long);
#endif
unsigned long (*get_unmapped_area) (struct file *, unsigned long,
unsigned long, unsigned long, unsigned long);
int (*mmap) (struct file *, struct vm_area_struct *);
int (*open) (struct file *);
int (*release) (struct file *);
};
struct video_device
{
#if defined(CONFIG_MEDIA_CONTROLLER)
struct media_entity entity;
#endif
const struct v4l2_file_operations *fops;
struct device dev;
struct cdev *cdev;
struct v4l2_device *v4l2_dev;
struct device *dev_parent;
struct v4l2_ctrl_handler *ctrl_handler;
struct vb2_queue *queue;
struct v4l2_prio_state *prio;
char name[32];
int vfl_type;
int vfl_dir;
int minor;
u16 num;
unsigned long flags;
int index;
spinlock_t fh_lock;
struct list_head fh_list;
int debug;
v4l2_std_id tvnorms;
void (*release)(struct video_device *vdev);
const struct v4l2_ioctl_ops *ioctl_ops;
DECLARE_BITMAP(valid_ioctls, BASE_VIDIOC_PRIVATE);
DECLARE_BITMAP(disable_locking, BASE_VIDIOC_PRIVATE);
struct mutex *lock;
};
#define media_entity_to_video_device(__e) \
container_of(__e, struct video_device, entity)
#define to_video_device(cd) container_of(cd, struct video_device, dev)
int __must_check __video_register_device(struct video_device *vdev, int type,
int nr, int warn_if_nr_in_use, struct module *owner);
static inline int __must_check video_register_device(struct video_device *vdev,
int type, int nr)
{
return __video_register_device(vdev, type, nr, 1, vdev->fops->owner);
}
static inline int __must_check video_register_device_no_warn(
struct video_device *vdev, int type, int nr)
{
return __video_register_device(vdev, type, nr, 0, vdev->fops->owner);
}
void video_unregister_device(struct video_device *vdev);
struct video_device * __must_check video_device_alloc(void);
void video_device_release(struct video_device *vdev);
void video_device_release_empty(struct video_device *vdev);
bool v4l2_is_known_ioctl(unsigned int cmd);
static inline void v4l2_disable_ioctl_locking(struct video_device *vdev, unsigned int cmd)
{
if (_IOC_NR(cmd) < BASE_VIDIOC_PRIVATE)
set_bit(_IOC_NR(cmd), vdev->disable_locking);
}
static inline void v4l2_disable_ioctl(struct video_device *vdev, unsigned int cmd)
{
if (_IOC_NR(cmd) < BASE_VIDIOC_PRIVATE)
set_bit(_IOC_NR(cmd), vdev->valid_ioctls);
}
static inline void *video_get_drvdata(struct video_device *vdev)
{
return dev_get_drvdata(&vdev->dev);
}
static inline void video_set_drvdata(struct video_device *vdev, void *data)
{
dev_set_drvdata(&vdev->dev, data);
}
struct video_device *video_devdata(struct file *file);
static inline void *video_drvdata(struct file *file)
{
return video_get_drvdata(video_devdata(file));
}
static inline const char *video_device_node_name(struct video_device *vdev)
{
return dev_name(&vdev->dev);
}
static inline int video_is_registered(struct video_device *vdev)
{
return test_bit(V4L2_FL_REGISTERED, &vdev->flags);
}
#endif