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v4l2-dev.h
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/*
*
* 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_OWNER 1 /* to be removed soon */
#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
/* Video standard functions */
extern unsigned int v4l2_video_std_fps(struct v4l2_standard *vs);
extern char *v4l2_norm_to_name(v4l2_std_id id);
extern int v4l2_video_std_construct(struct v4l2_standard *vs,
int id, char *name);
/* Prints the ioctl in a human-readable format */
extern void v4l_printk_ioctl(unsigned int cmd);
/* prority handling */
struct v4l2_prio_state {
atomic_t prios[4];
};
int 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);
int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local);
int 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);
/* names for fancy debug output */
extern char *v4l2_field_names[];
extern char *v4l2_type_names[];
/* Compatibility layer interface -- v4l1-compat module */
typedef int (*v4l2_kioctl)(struct inode *inode, struct file *file,
unsigned int cmd, void *arg);
#ifdef CONFIG_VIDEO_V4L1_COMPAT
int v4l_compat_translate_ioctl(struct inode *inode, struct file *file,
int cmd, void *arg, v4l2_kioctl driver_ioctl);
#else
#define v4l_compat_translate_ioctl(inode,file,cmd,arg,ioctl) -EINVAL
#endif
/* 32 Bits compatibility layer for 64 bits processors */
extern long v4l_compat_ioctl32(struct file *file, unsigned int cmd,
unsigned long arg);
/*
* 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 class_dev; /* v4l device */
struct device *dev; /* device parent */
/* device info */
char name[32];
int type; /* v4l1 */
int type2; /* v4l2 */
int minor;
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 */
/* VIDIOC_QUERYCAP handler */
int (*vidioc_querycap)(struct file *file, void *fh, struct v4l2_capability *cap);
/* Priority handling */
int (*vidioc_g_priority) (struct file *file, void *fh,
enum v4l2_priority *p);
int (*vidioc_s_priority) (struct file *file, void *fh,
enum v4l2_priority p);
/* VIDIOC_ENUM_FMT handlers */
int (*vidioc_enum_fmt_cap) (struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_overlay) (struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_vbi) (struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_vbi_capture) (struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_video_output)(struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_output_overlay) (struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_vbi_output) (struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_type_private)(struct file *file, void *fh,
struct v4l2_fmtdesc *f);
/* VIDIOC_G_FMT handlers */
int (*vidioc_g_fmt_cap) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_overlay) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vbi) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vbi_output) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vbi_capture)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_video_output)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_output_overlay) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_type_private)(struct file *file, void *fh,
struct v4l2_format *f);
/* VIDIOC_S_FMT handlers */
int (*vidioc_s_fmt_cap) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_overlay) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vbi) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vbi_output) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vbi_capture)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_video_output)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_output_overlay) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_type_private)(struct file *file, void *fh,
struct v4l2_format *f);
/* VIDIOC_TRY_FMT handlers */
int (*vidioc_try_fmt_cap) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_overlay) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vbi) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vbi_output) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vbi_capture)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_video_output)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_output_overlay)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_type_private)(struct file *file, void *fh,
struct v4l2_format *f);
/* Buffer handlers */
int (*vidioc_reqbufs) (struct file *file, void *fh, struct v4l2_requestbuffers *b);
int (*vidioc_querybuf)(struct file *file, void *fh, struct v4l2_buffer *b);
int (*vidioc_qbuf) (struct file *file, void *fh, struct v4l2_buffer *b);
int (*vidioc_dqbuf) (struct file *file, void *fh, struct v4l2_buffer *b);
int (*vidioc_overlay) (struct file *file, void *fh, unsigned int i);
#ifdef CONFIG_VIDEO_V4L1_COMPAT
/* buffer type is struct vidio_mbuf * */
int (*vidiocgmbuf) (struct file *file, void *fh, struct video_mbuf *p);
#endif
int (*vidioc_g_fbuf) (struct file *file, void *fh,
struct v4l2_framebuffer *a);
int (*vidioc_s_fbuf) (struct file *file, void *fh,
struct v4l2_framebuffer *a);
/* Stream on/off */
int (*vidioc_streamon) (struct file *file, void *fh, enum v4l2_buf_type i);
int (*vidioc_streamoff)(struct file *file, void *fh, enum v4l2_buf_type i);
/* Standard handling
G_STD and ENUMSTD are handled by videodev.c
*/
int (*vidioc_s_std) (struct file *file, void *fh, v4l2_std_id *norm);
int (*vidioc_querystd) (struct file *file, void *fh, v4l2_std_id *a);
/* Input handling */
int (*vidioc_enum_input)(struct file *file, void *fh,
struct v4l2_input *inp);
int (*vidioc_g_input) (struct file *file, void *fh, unsigned int *i);
int (*vidioc_s_input) (struct file *file, void *fh, unsigned int i);
/* Output handling */
int (*vidioc_enumoutput) (struct file *file, void *fh,
struct v4l2_output *a);
int (*vidioc_g_output) (struct file *file, void *fh, unsigned int *i);
int (*vidioc_s_output) (struct file *file, void *fh, unsigned int i);
/* Control handling */
int (*vidioc_queryctrl) (struct file *file, void *fh,
struct v4l2_queryctrl *a);
int (*vidioc_g_ctrl) (struct file *file, void *fh,
struct v4l2_control *a);
int (*vidioc_s_ctrl) (struct file *file, void *fh,
struct v4l2_control *a);
int (*vidioc_g_ext_ctrls) (struct file *file, void *fh,
struct v4l2_ext_controls *a);
int (*vidioc_s_ext_ctrls) (struct file *file, void *fh,
struct v4l2_ext_controls *a);
int (*vidioc_try_ext_ctrls) (struct file *file, void *fh,
struct v4l2_ext_controls *a);
int (*vidioc_querymenu) (struct file *file, void *fh,
struct v4l2_querymenu *a);
/* Audio ioctls */
int (*vidioc_enumaudio) (struct file *file, void *fh,
struct v4l2_audio *a);
int (*vidioc_g_audio) (struct file *file, void *fh,
struct v4l2_audio *a);
int (*vidioc_s_audio) (struct file *file, void *fh,
struct v4l2_audio *a);
/* Audio out ioctls */
int (*vidioc_enumaudout) (struct file *file, void *fh,
struct v4l2_audioout *a);
int (*vidioc_g_audout) (struct file *file, void *fh,
struct v4l2_audioout *a);
int (*vidioc_s_audout) (struct file *file, void *fh,
struct v4l2_audioout *a);
int (*vidioc_g_modulator) (struct file *file, void *fh,
struct v4l2_modulator *a);
int (*vidioc_s_modulator) (struct file *file, void *fh,
struct v4l2_modulator *a);
/* Crop ioctls */
int (*vidioc_cropcap) (struct file *file, void *fh,
struct v4l2_cropcap *a);
int (*vidioc_g_crop) (struct file *file, void *fh,
struct v4l2_crop *a);
int (*vidioc_s_crop) (struct file *file, void *fh,
struct v4l2_crop *a);
/* Compression ioctls */
int (*vidioc_g_jpegcomp) (struct file *file, void *fh,
struct v4l2_jpegcompression *a);
int (*vidioc_s_jpegcomp) (struct file *file, void *fh,
struct v4l2_jpegcompression *a);
int (*vidioc_g_enc_index) (struct file *file, void *fh,
struct v4l2_enc_idx *a);
int (*vidioc_encoder_cmd) (struct file *file, void *fh,
struct v4l2_encoder_cmd *a);
int (*vidioc_try_encoder_cmd) (struct file *file, void *fh,
struct v4l2_encoder_cmd *a);
/* Stream type-dependent parameter ioctls */
int (*vidioc_g_parm) (struct file *file, void *fh,
struct v4l2_streamparm *a);
int (*vidioc_s_parm) (struct file *file, void *fh,
struct v4l2_streamparm *a);
/* Tuner ioctls */
int (*vidioc_g_tuner) (struct file *file, void *fh,
struct v4l2_tuner *a);
int (*vidioc_s_tuner) (struct file *file, void *fh,
struct v4l2_tuner *a);
int (*vidioc_g_frequency) (struct file *file, void *fh,
struct v4l2_frequency *a);
int (*vidioc_s_frequency) (struct file *file, void *fh,
struct v4l2_frequency *a);
/* Sliced VBI cap */
int (*vidioc_g_sliced_vbi_cap) (struct file *file, void *fh,
struct v4l2_sliced_vbi_cap *a);
/* Log status ioctl */
int (*vidioc_log_status) (struct file *file, void *fh);
/* Debugging ioctls */
#ifdef CONFIG_VIDEO_ADV_DEBUG
int (*vidioc_g_register) (struct file *file, void *fh,
struct v4l2_register *reg);
int (*vidioc_s_register) (struct file *file, void *fh,
struct v4l2_register *reg);
#endif
int (*vidioc_g_chip_ident) (struct file *file, void *fh,
struct v4l2_chip_ident *chip);
/* For other private ioctls */
int (*vidioc_default) (struct file *file, void *fh,
int cmd, void *arg);
#ifdef OBSOLETE_OWNER /* to be removed soon */
/* obsolete -- fops->owner is used instead */
struct module *owner;
/* 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, class_dev)
/* Version 2 functions */
extern int video_register_device(struct video_device *vfd, int type, int nr);
void video_unregister_device(struct video_device *);
extern int video_ioctl2(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg);
/* 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);
/* Include support for obsoleted stuff */
extern int video_usercopy(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg,
int (*func)(struct inode *inode, struct file *file,
unsigned int cmd, void *arg));
#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->class_dev, attr);
if (ret < 0)
printk(KERN_WARNING "%s error: %d\n", __FUNCTION__, ret);
return ret;
}
static inline void
video_device_remove_file(struct video_device *vfd,
struct device_attribute *attr)
{
device_remove_file(&vfd->class_dev, attr);
}
#endif /* CONFIG_VIDEO_V4L1_COMPAT */
#ifdef OBSOLETE_OWNER /* 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;
}
#endif
#ifdef OBSOLETE_DEVDATA /* to be removed soon */
/* 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 */