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linux/include/media/v4l2-ioctl.h
Mauro Carvalho Chehab 8a522c916d V4L/DVB (9331): Remove unused inode parameter from video_ioctl2 
inode is never used on video_ioctl2. Remove it and rename the function to
__video_ioctl2. This allows its usage directly as a callback at
fops.unlocked_ioctl.

Since we still need a callback with inode to be used with fops.ioctl,
this patch adds video_ioctl2() that is just a call to __video_ioctl2().

Also, this patch adds some comments about video_ioctl2 and __video_ioctl2
usage at v4l2-ioctl.h.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2008-10-21 14:31:49 -02:00

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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_IOCTL_H
#define _V4L2_IOCTL_H
#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
struct v4l2_ioctl_ops {
/* 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_vid_cap) (struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_vid_overlay) (struct file *file, void *fh,
struct v4l2_fmtdesc *f);
int (*vidioc_enum_fmt_vid_out) (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_vid_cap) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vid_overlay)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vid_out) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vid_out_overlay)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vbi_cap) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_vbi_out) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_sliced_vbi_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_g_fmt_sliced_vbi_out)(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_vid_cap) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vid_overlay)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vid_out) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vid_out_overlay)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vbi_cap) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_vbi_out) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_sliced_vbi_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_s_fmt_sliced_vbi_out)(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_vid_cap) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vid_overlay)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vid_out) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vid_out_overlay)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vbi_cap) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_vbi_out) (struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_sliced_vbi_cap)(struct file *file, void *fh,
struct v4l2_format *f);
int (*vidioc_try_fmt_sliced_vbi_out)(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_enum_output) (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);
};
/* v4l debugging and diagnostics */
/* Debug bitmask flags to be used on V4L2 */
#define V4L2_DEBUG_IOCTL 0x01
#define V4L2_DEBUG_IOCTL_ARG 0x02
/* Use this macro for non-I2C drivers. Pass the driver name as the first arg. */
#define v4l_print_ioctl(name, cmd) \
do { \
printk(KERN_DEBUG "%s: ", name); \
v4l_printk_ioctl(cmd); \
} while (0)
/* Use this macro in I2C drivers where 'client' is the struct i2c_client
pointer */
#define v4l_i2c_print_ioctl(client, cmd) \
do { \
v4l_client_printk(KERN_DEBUG, client, ""); \
v4l_printk_ioctl(cmd); \
} while (0)
/* 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);
/* names for fancy debug output */
extern const char *v4l2_field_names[];
extern const char *v4l2_type_names[];
/* Compatibility layer interface -- v4l1-compat module */
typedef int (*v4l2_kioctl)(struct file *file,
unsigned int cmd, void *arg);
#ifdef CONFIG_VIDEO_V4L1_COMPAT
int v4l_compat_translate_ioctl(struct file *file,
int cmd, void *arg, v4l2_kioctl driver_ioctl);
#else
#define v4l_compat_translate_ioctl(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);
/* 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));
/* Standard handlers for V4L ioctl's */
/* This prototype is used on fops.unlocked_ioctl */
extern int __video_ioctl2(struct file *file,
unsigned int cmd, unsigned long arg);
/* This prototype is used on fops.ioctl
* Since fops.ioctl enables Kernel Big Lock, it is preferred
* to use __video_ioctl2 instead.
* It should be noticed that there's no lock code inside
* video_ioctl2().
*/
extern int video_ioctl2(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg);
#endif /* _V4L2_IOCTL_H */
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