406 lines
14 KiB
C
406 lines
14 KiB
C
/*
|
|
*
|
|
* 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 const char *v4l2_norm_to_name(v4l2_std_id id);
|
|
extern int v4l2_video_std_construct(struct v4l2_standard *vs,
|
|
int id, const 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
|
|
ENUMSTD is handled by videodev.c
|
|
*/
|
|
int (*vidioc_g_std) (struct file *file, void *fh, v4l2_std_id *norm);
|
|
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);
|
|
|
|
int (*vidioc_s_hw_freq_seek) (struct file *file, void *fh,
|
|
struct v4l2_hw_freq_seek *a);
|
|
|
|
/* 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 */
|