v4l2-ioctl.h

/*
 *
 *	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 file *file, unsigned int cmd,
				unsigned long arg, v4l2_kioctl func);

/* 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 */