/*
   *
   *	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/mutex.h>
  #include <linux/compiler.h> /* need __user */

  #include <linux/videodev2.h>

  struct v4l2_fh;

  /**
   * struct v4l2_ioctl_ops - describe operations for each V4L2 ioctl
   *
   * @vidioc_querycap: pointer to the function that implements
   *	:ref:`VIDIOC_QUERYCAP <vidioc_querycap>` ioctl
   * @vidioc_enum_fmt_vid_cap: pointer to the function that implements
   *	:ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic
   *	for video capture in single plane mode
   * @vidioc_enum_fmt_vid_overlay: pointer to the function that implements
   *	:ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic
   *	for video overlay
   * @vidioc_enum_fmt_vid_out: pointer to the function that implements
   *	:ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic
   *	for video output in single plane mode
   * @vidioc_enum_fmt_vid_cap_mplane: pointer to the function that implements
   *	:ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic
   *	for video capture in multiplane mode
   * @vidioc_enum_fmt_vid_out_mplane: pointer to the function that implements
   *	:ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic
   *	for video output in multiplane mode
   * @vidioc_enum_fmt_sdr_cap: pointer to the function that implements
   *	:ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic
   *	for Software Defined Radio capture
   * @vidioc_enum_fmt_sdr_out: pointer to the function that implements
   *	:ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic
   *	for Software Defined Radio output
   * @vidioc_g_fmt_vid_cap: pointer to the function that implements
   *	:ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video capture
   *	in single plane mode
   * @vidioc_g_fmt_vid_overlay: pointer to the function that implements
   *	:ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video overlay
   * @vidioc_g_fmt_vid_out: pointer to the function that implements
   *	:ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video out
   *	in single plane mode
   * @vidioc_g_fmt_vid_out_overlay: pointer to the function that implements
   *	:ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video overlay output
   * @vidioc_g_fmt_vbi_cap: pointer to the function that implements
   *	:ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for raw VBI capture
   * @vidioc_g_fmt_vbi_out: pointer to the function that implements
   *	:ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for raw VBI output
   * @vidioc_g_fmt_sliced_vbi_cap: pointer to the function that implements
   *	:ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI capture
   * @vidioc_g_fmt_sliced_vbi_out: pointer to the function that implements
   *	:ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI output
   * @vidioc_g_fmt_vid_cap_mplane: pointer to the function that implements
   *	:ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video capture
   *	in multiple plane mode
   * @vidioc_g_fmt_vid_out_mplane: pointer to the function that implements
   *	:ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video out
   *	in multiplane plane mode
   * @vidioc_g_fmt_sdr_cap: pointer to the function that implements
   *	:ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for Software Defined
   *	Radio capture
   * @vidioc_g_fmt_sdr_out: pointer to the function that implements
   *	:ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for Software Defined
   *	Radio output
   * @vidioc_s_fmt_vid_cap: pointer to the function that implements
   *	:ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video capture
   *	in single plane mode
   * @vidioc_s_fmt_vid_overlay: pointer to the function that implements
   *	:ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video overlay
   * @vidioc_s_fmt_vid_out: pointer to the function that implements
   *	:ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video out
   *	in single plane mode
   * @vidioc_s_fmt_vid_out_overlay: pointer to the function that implements
   *	:ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video overlay output
   * @vidioc_s_fmt_vbi_cap: pointer to the function that implements
   *	:ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for raw VBI capture
   * @vidioc_s_fmt_vbi_out: pointer to the function that implements
   *	:ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for raw VBI output
   * @vidioc_s_fmt_sliced_vbi_cap: pointer to the function that implements
   *	:ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI capture
   * @vidioc_s_fmt_sliced_vbi_out: pointer to the function that implements
   *	:ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI output
   * @vidioc_s_fmt_vid_cap_mplane: pointer to the function that implements
   *	:ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video capture
   *	in multiple plane mode
   * @vidioc_s_fmt_vid_out_mplane: pointer to the function that implements
   *	:ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video out
   *	in multiplane plane mode
   * @vidioc_s_fmt_sdr_cap: pointer to the function that implements
   *	:ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for Software Defined
   *	Radio capture
   * @vidioc_s_fmt_sdr_out: pointer to the function that implements
   *	:ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for Software Defined
   *	Radio output
   * @vidioc_try_fmt_vid_cap: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video capture
   *	in single plane mode
   * @vidioc_try_fmt_vid_overlay: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video overlay
   * @vidioc_try_fmt_vid_out: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video out
   *	in single plane mode
   * @vidioc_try_fmt_vid_out_overlay: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video overlay
   *	output
   * @vidioc_try_fmt_vbi_cap: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for raw VBI capture
   * @vidioc_try_fmt_vbi_out: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for raw VBI output
   * @vidioc_try_fmt_sliced_vbi_cap: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI
   *	capture
   * @vidioc_try_fmt_sliced_vbi_out: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI output
   * @vidioc_try_fmt_vid_cap_mplane: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video capture
   *	in multiple plane mode
   * @vidioc_try_fmt_vid_out_mplane: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video out
   *	in multiplane plane mode
   * @vidioc_try_fmt_sdr_cap: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for Software Defined
   *	Radio capture
   * @vidioc_try_fmt_sdr_out: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for Software Defined
   *	Radio output
   * @vidioc_reqbufs: pointer to the function that implements
   *	:ref:`VIDIOC_REQBUFS <vidioc_reqbufs>` ioctl
   * @vidioc_querybuf: pointer to the function that implements
   *	:ref:`VIDIOC_QUERYBUF <vidioc_querybuf>` ioctl
   * @vidioc_qbuf: pointer to the function that implements
   *	:ref:`VIDIOC_QBUF <vidioc_qbuf>` ioctl
   * @vidioc_expbuf: pointer to the function that implements
   *	:ref:`VIDIOC_EXPBUF <vidioc_expbuf>` ioctl
   * @vidioc_dqbuf: pointer to the function that implements
   *	:ref:`VIDIOC_DQBUF <vidioc_qbuf>` ioctl
   * @vidioc_create_bufs: pointer to the function that implements
   *	:ref:`VIDIOC_CREATE_BUFS <vidioc_create_bufs>` ioctl
   * @vidioc_prepare_buf: pointer to the function that implements
   *	:ref:`VIDIOC_PREPARE_BUF <vidioc_prepare_buf>` ioctl
   * @vidioc_overlay: pointer to the function that implements
   *	:ref:`VIDIOC_OVERLAY <vidioc_overlay>` ioctl
   * @vidioc_g_fbuf: pointer to the function that implements
   *	:ref:`VIDIOC_G_FBUF <vidioc_g_fbuf>` ioctl
   * @vidioc_s_fbuf: pointer to the function that implements
   *	:ref:`VIDIOC_S_FBUF <vidioc_g_fbuf>` ioctl
   * @vidioc_streamon: pointer to the function that implements
   *	:ref:`VIDIOC_STREAMON <vidioc_streamon>` ioctl
   * @vidioc_streamoff: pointer to the function that implements
   *	:ref:`VIDIOC_STREAMOFF <vidioc_streamon>` ioctl
   * @vidioc_g_std: pointer to the function that implements
   *	:ref:`VIDIOC_G_STD <vidioc_g_std>` ioctl
   * @vidioc_s_std: pointer to the function that implements
   *	:ref:`VIDIOC_S_STD <vidioc_g_std>` ioctl
   * @vidioc_querystd: pointer to the function that implements
   *	:ref:`VIDIOC_QUERYSTD <vidioc_querystd>` ioctl
   * @vidioc_enum_input: pointer to the function that implements
   *	:ref:`VIDIOC_ENUM_INPUT <vidioc_g_input>` ioctl
   * @vidioc_g_input: pointer to the function that implements
   *	:ref:`VIDIOC_G_INPUT <vidioc_g_input>` ioctl
   * @vidioc_s_input: pointer to the function that implements
   *	:ref:`VIDIOC_S_INPUT <vidioc_g_input>` ioctl
   * @vidioc_enum_output: pointer to the function that implements
   *	:ref:`VIDIOC_ENUM_OUTPUT <vidioc_g_output>` ioctl
   * @vidioc_g_output: pointer to the function that implements
   *	:ref:`VIDIOC_G_OUTPUT <vidioc_g_output>` ioctl
   * @vidioc_s_output: pointer to the function that implements
   *	:ref:`VIDIOC_S_OUTPUT <vidioc_g_output>` ioctl
   * @vidioc_queryctrl: pointer to the function that implements
   *	:ref:`VIDIOC_QUERYCTRL <vidioc_queryctrl>` ioctl
   * @vidioc_query_ext_ctrl: pointer to the function that implements
   *	:ref:`VIDIOC_QUERY_EXT_CTRL <vidioc_queryctrl>` ioctl
   * @vidioc_g_ctrl: pointer to the function that implements
   *	:ref:`VIDIOC_G_CTRL <vidioc_g_ctrl>` ioctl
   * @vidioc_s_ctrl: pointer to the function that implements
   *	:ref:`VIDIOC_S_CTRL <vidioc_g_ctrl>` ioctl
   * @vidioc_g_ext_ctrls: pointer to the function that implements
   *	:ref:`VIDIOC_G_EXT_CTRLS <vidioc_g_ext_ctrls>` ioctl
   * @vidioc_s_ext_ctrls: pointer to the function that implements
   *	:ref:`VIDIOC_S_EXT_CTRLS <vidioc_g_ext_ctrls>` ioctl
   * @vidioc_try_ext_ctrls: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_EXT_CTRLS <vidioc_g_ext_ctrls>` ioctl
   * @vidioc_querymenu: pointer to the function that implements
   *	:ref:`VIDIOC_QUERYMENU <vidioc_queryctrl>` ioctl
   * @vidioc_enumaudio: pointer to the function that implements
   *	:ref:`VIDIOC_ENUMAUDIO <vidioc_enumaudio>` ioctl
   * @vidioc_g_audio: pointer to the function that implements
   *	:ref:`VIDIOC_G_AUDIO <vidioc_g_audio>` ioctl
   * @vidioc_s_audio: pointer to the function that implements
   *	:ref:`VIDIOC_S_AUDIO <vidioc_g_audio>` ioctl
   * @vidioc_enumaudout: pointer to the function that implements
   *	:ref:`VIDIOC_ENUMAUDOUT <vidioc_enumaudout>` ioctl
   * @vidioc_g_audout: pointer to the function that implements
   *	:ref:`VIDIOC_G_AUDOUT <vidioc_g_audout>` ioctl
   * @vidioc_s_audout: pointer to the function that implements
   *	:ref:`VIDIOC_S_AUDOUT <vidioc_g_audout>` ioctl
   * @vidioc_g_modulator: pointer to the function that implements
   *	:ref:`VIDIOC_G_MODULATOR <vidioc_g_modulator>` ioctl
   * @vidioc_s_modulator: pointer to the function that implements
   *	:ref:`VIDIOC_S_MODULATOR <vidioc_g_modulator>` ioctl
   * @vidioc_cropcap: pointer to the function that implements
   *	:ref:`VIDIOC_CROPCAP <vidioc_cropcap>` ioctl
   * @vidioc_g_crop: pointer to the function that implements
   *	:ref:`VIDIOC_G_CROP <vidioc_g_crop>` ioctl
   * @vidioc_s_crop: pointer to the function that implements
   *	:ref:`VIDIOC_S_CROP <vidioc_g_crop>` ioctl
   * @vidioc_g_selection: pointer to the function that implements
   *	:ref:`VIDIOC_G_SELECTION <vidioc_g_selection>` ioctl
   * @vidioc_s_selection: pointer to the function that implements
   *	:ref:`VIDIOC_S_SELECTION <vidioc_g_selection>` ioctl
   * @vidioc_g_jpegcomp: pointer to the function that implements
   *	:ref:`VIDIOC_G_JPEGCOMP <vidioc_g_jpegcomp>` ioctl
   * @vidioc_s_jpegcomp: pointer to the function that implements
   *	:ref:`VIDIOC_S_JPEGCOMP <vidioc_g_jpegcomp>` ioctl
   * @vidioc_g_enc_index: pointer to the function that implements
   *	:ref:`VIDIOC_G_ENC_INDEX <vidioc_g_enc_index>` ioctl
   * @vidioc_encoder_cmd: pointer to the function that implements
   *	:ref:`VIDIOC_ENCODER_CMD <vidioc_encoder_cmd>` ioctl
   * @vidioc_try_encoder_cmd: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_ENCODER_CMD <vidioc_encoder_cmd>` ioctl
   * @vidioc_decoder_cmd: pointer to the function that implements
   *	:ref:`VIDIOC_DECODER_CMD <vidioc_decoder_cmd>` ioctl
   * @vidioc_try_decoder_cmd: pointer to the function that implements
   *	:ref:`VIDIOC_TRY_DECODER_CMD <vidioc_decoder_cmd>` ioctl
   * @vidioc_g_parm: pointer to the function that implements
   *	:ref:`VIDIOC_G_PARM <vidioc_g_parm>` ioctl
   * @vidioc_s_parm: pointer to the function that implements
   *	:ref:`VIDIOC_S_PARM <vidioc_g_parm>` ioctl
   * @vidioc_g_tuner: pointer to the function that implements
   *	:ref:`VIDIOC_G_TUNER <vidioc_g_tuner>` ioctl
   * @vidioc_s_tuner: pointer to the function that implements
   *	:ref:`VIDIOC_S_TUNER <vidioc_g_tuner>` ioctl
   * @vidioc_g_frequency: pointer to the function that implements
   *	:ref:`VIDIOC_G_FREQUENCY <vidioc_g_frequency>` ioctl
   * @vidioc_s_frequency: pointer to the function that implements
   *	:ref:`VIDIOC_S_FREQUENCY <vidioc_g_frequency>` ioctl
   * @vidioc_enum_freq_bands: pointer to the function that implements
   *	:ref:`VIDIOC_ENUM_FREQ_BANDS <vidioc_enum_freq_bands>` ioctl
   * @vidioc_g_sliced_vbi_cap: pointer to the function that implements
   *	:ref:`VIDIOC_G_SLICED_VBI_CAP <vidioc_g_sliced_vbi_cap>` ioctl
   * @vidioc_log_status: pointer to the function that implements
   *	:ref:`VIDIOC_LOG_STATUS <vidioc_log_status>` ioctl
   * @vidioc_s_hw_freq_seek: pointer to the function that implements
   *	:ref:`VIDIOC_S_HW_FREQ_SEEK <vidioc_s_hw_freq_seek>` ioctl
   * @vidioc_g_register: pointer to the function that implements
   *	:ref:`VIDIOC_DBG_G_REGISTER <vidioc_dbg_g_register>` ioctl
   * @vidioc_s_register: pointer to the function that implements
   *	:ref:`VIDIOC_DBG_S_REGISTER <vidioc_dbg_g_register>` ioctl
   * @vidioc_g_chip_info: pointer to the function that implements
   *	:ref:`VIDIOC_DBG_G_CHIP_INFO <vidioc_dbg_g_chip_info>` ioctl
   * @vidioc_enum_framesizes: pointer to the function that implements
   *	:ref:`VIDIOC_ENUM_FRAMESIZES <vidioc_enum_framesizes>` ioctl
   * @vidioc_enum_frameintervals: pointer to the function that implements
   *	:ref:`VIDIOC_ENUM_FRAMEINTERVALS <vidioc_enum_frameintervals>` ioctl
   * @vidioc_s_dv_timings: pointer to the function that implements
   *	:ref:`VIDIOC_S_DV_TIMINGS <vidioc_g_dv_timings>` ioctl
   * @vidioc_g_dv_timings: pointer to the function that implements
   *	:ref:`VIDIOC_G_DV_TIMINGS <vidioc_g_dv_timings>` ioctl
   * @vidioc_query_dv_timings: pointer to the function that implements
   *	:ref:`VIDIOC_QUERY_DV_TIMINGS <vidioc_query_dv_timings>` ioctl
   * @vidioc_enum_dv_timings: pointer to the function that implements
   *	:ref:`VIDIOC_ENUM_DV_TIMINGS <vidioc_enum_dv_timings>` ioctl
   * @vidioc_dv_timings_cap: pointer to the function that implements
   *	:ref:`VIDIOC_DV_TIMINGS_CAP <vidioc_dv_timings_cap>` ioctl
   * @vidioc_g_edid: pointer to the function that implements
   *	:ref:`VIDIOC_G_EDID <vidioc_g_edid>` ioctl
   * @vidioc_s_edid: pointer to the function that implements
   *	:ref:`VIDIOC_S_EDID <vidioc_g_edid>` ioctl
   * @vidioc_subscribe_event: pointer to the function that implements
   *	:ref:`VIDIOC_SUBSCRIBE_EVENT <vidioc_subscribe_event>` ioctl
   * @vidioc_unsubscribe_event: pointer to the function that implements
   *	:ref:`VIDIOC_UNSUBSCRIBE_EVENT <vidioc_unsubscribe_event>` ioctl
   * @vidioc_default: pointed used to allow other ioctls
   */

  struct v4l2_ioctl_ops {
  	/* ioctl callbacks */
  
  	/* VIDIOC_QUERYCAP handler */

  	int (*vidioc_querycap)(struct file *file, void *fh,
  			       struct v4l2_capability *cap);

  	/* 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_vid_cap_mplane)(struct file *file, void *fh,
  					      struct v4l2_fmtdesc *f);
  	int (*vidioc_enum_fmt_vid_out_mplane)(struct file *file, void *fh,
  					      struct v4l2_fmtdesc *f);

  	int (*vidioc_enum_fmt_sdr_cap)(struct file *file, void *fh,
  				       struct v4l2_fmtdesc *f);
  	int (*vidioc_enum_fmt_sdr_out)(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_vid_cap_mplane)(struct file *file, void *fh,
  					   struct v4l2_format *f);
  	int (*vidioc_g_fmt_vid_out_mplane)(struct file *file, void *fh,
  					   struct v4l2_format *f);

  	int (*vidioc_g_fmt_sdr_cap)(struct file *file, void *fh,
  				    struct v4l2_format *f);
  	int (*vidioc_g_fmt_sdr_out)(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_vid_cap_mplane)(struct file *file, void *fh,
  					   struct v4l2_format *f);
  	int (*vidioc_s_fmt_vid_out_mplane)(struct file *file, void *fh,
  					   struct v4l2_format *f);

  	int (*vidioc_s_fmt_sdr_cap)(struct file *file, void *fh,
  				    struct v4l2_format *f);
  	int (*vidioc_s_fmt_sdr_out)(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_vid_cap_mplane)(struct file *file, void *fh,
  					     struct v4l2_format *f);
  	int (*vidioc_try_fmt_vid_out_mplane)(struct file *file, void *fh,
  					     struct v4l2_format *f);

  	int (*vidioc_try_fmt_sdr_cap)(struct file *file, void *fh,
  				      struct v4l2_format *f);
  	int (*vidioc_try_fmt_sdr_out)(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_expbuf)(struct file *file, void *fh,
  			     struct v4l2_exportbuffer *e);
  	int (*vidioc_dqbuf)(struct file *file, void *fh,
  			    struct v4l2_buffer *b);
  
  	int (*vidioc_create_bufs)(struct file *file, void *fh,
  				  struct v4l2_create_buffers *b);
  	int (*vidioc_prepare_buf)(struct file *file, void *fh,
  				  struct v4l2_buffer *b);
  
  	int (*vidioc_overlay)(struct file *file, void *fh, unsigned int i);
  	int (*vidioc_g_fbuf)(struct file *file, void *fh,
  			     struct v4l2_framebuffer *a);
  	int (*vidioc_s_fbuf)(struct file *file, void *fh,
  			     const 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
  		 *
  		 * Note: 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_query_ext_ctrl)(struct file *file, void *fh,
  				     struct v4l2_query_ext_ctrl *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,
  			      const 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,
  			       const 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,
  				  const 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,
  			     const struct v4l2_crop *a);
  	int (*vidioc_g_selection)(struct file *file, void *fh,
  				  struct v4l2_selection *s);
  	int (*vidioc_s_selection)(struct file *file, void *fh,
  				  struct v4l2_selection *s);

  	/* Compression ioctls */

  	int (*vidioc_g_jpegcomp)(struct file *file, void *fh,
  				 struct v4l2_jpegcompression *a);
  	int (*vidioc_s_jpegcomp)(struct file *file, void *fh,
  				 const 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);
  	int (*vidioc_decoder_cmd)(struct file *file, void *fh,
  				  struct v4l2_decoder_cmd *a);
  	int (*vidioc_try_decoder_cmd)(struct file *file, void *fh,
  				      struct v4l2_decoder_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,
  			      const 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,
  				  const struct v4l2_frequency *a);
  	int (*vidioc_enum_freq_bands)(struct file *file, void *fh,
  				      struct v4l2_frequency_band *band);

  
  	/* 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,
  				     const struct v4l2_hw_freq_seek *a);

  
  	/* Debugging ioctls */
  #ifdef CONFIG_VIDEO_ADV_DEBUG

  	int (*vidioc_g_register)(struct file *file, void *fh,
  				 struct v4l2_dbg_register *reg);
  	int (*vidioc_s_register)(struct file *file, void *fh,
  				 const struct v4l2_dbg_register *reg);

  	int (*vidioc_g_chip_info)(struct file *file, void *fh,
  				  struct v4l2_dbg_chip_info *chip);

  #endif

  	int (*vidioc_g_chip_ident)     (struct file *file, void *fh,
  					struct v4l2_dbg_chip_ident *chip);

  	int (*vidioc_enum_framesizes)(struct file *file, void *fh,
  				      struct v4l2_frmsizeenum *fsize);

  	int (*vidioc_enum_frameintervals)(struct file *file, void *fh,
  					  struct v4l2_frmivalenum *fival);

  	/* DV Timings IOCTLs */

  	int (*vidioc_s_dv_timings)(struct file *file, void *fh,
  				   struct v4l2_dv_timings *timings);
  	int (*vidioc_g_dv_timings)(struct file *file, void *fh,
  				   struct v4l2_dv_timings *timings);
  	int (*vidioc_query_dv_timings)(struct file *file, void *fh,
  				       struct v4l2_dv_timings *timings);
  	int (*vidioc_enum_dv_timings)(struct file *file, void *fh,
  				      struct v4l2_enum_dv_timings *timings);
  	int (*vidioc_dv_timings_cap)(struct file *file, void *fh,
  				     struct v4l2_dv_timings_cap *cap);
  	int (*vidioc_g_edid)(struct file *file, void *fh,
  			     struct v4l2_edid *edid);
  	int (*vidioc_s_edid)(struct file *file, void *fh,
  			     struct v4l2_edid *edid);
  
  	int (*vidioc_subscribe_event)(struct v4l2_fh *fh,
  				      const struct v4l2_event_subscription *sub);

  	int (*vidioc_unsubscribe_event)(struct v4l2_fh *fh,

  					const struct v4l2_event_subscription *sub);

  	/* For other private ioctls */

  	long (*vidioc_default)(struct file *file, void *fh,
  			       bool valid_prio, unsigned int cmd, void *arg);

  };

  /* v4l debugging and diagnostics */

  /* Device debug flags to be used with the video device debug attribute */
  
  /* Just log the ioctl name + error code */
  #define V4L2_DEV_DEBUG_IOCTL		0x01
  /* Log the ioctl name arguments + error code */
  #define V4L2_DEV_DEBUG_IOCTL_ARG	0x02
  /* Log the file operations open, release, mmap and get_unmapped_area */
  #define V4L2_DEV_DEBUG_FOP		0x04
  /* Log the read and write file operations and the VIDIOC_(D)QBUF ioctls */
  #define V4L2_DEV_DEBUG_STREAMING	0x08
  /* Log poll() */
  #define V4L2_DEV_DEBUG_POLL		0x10

  /*  Video standard functions  */

  
  /**
   * v4l2_norm_to_name - Ancillary routine to analog TV standard name from its ID.
   *
   * @id:	analog TV standard ID.
   *
   * Return: returns a string with the name of the analog TV standard.
   * If the standard is not found or if @id points to multiple standard,
   * it returns "Unknown".
   */
  const char *v4l2_norm_to_name(v4l2_std_id id);
  
  /**
   * v4l2_video_std_frame_period - Ancillary routine that fills a
   *	struct &v4l2_fract pointer with the default framerate fraction.
   *
   * @id: analog TV sdandard ID.
   * @frameperiod: struct &v4l2_fract pointer to be filled
   *
   */
  void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod);
  
  /**
   * v4l2_video_std_construct - Ancillary routine that fills in the fields of
   *	a &v4l2_standard structure according to the @id parameter.
   *
   * @vs: struct &v4l2_standard pointer to be filled
   * @id: analog TV sdandard ID.
   * @name: name of the standard to be used
   *
   * .. note::
   *
   *    This ancillary routine is obsolete. Shouldn't be used on newer drivers.
   */
  int v4l2_video_std_construct(struct v4l2_standard *vs,

  				    int id, const char *name);

  /**
   * v4l_printk_ioctl - Ancillary routine that prints the ioctl in a
   *	human-readable format.
   *
   * @prefix: prefix to be added at the ioctl prints.
   * @cmd: ioctl name
   *
   * .. note::
   *
   *    If prefix != %NULL, then it will issue a
   *    ``printk(KERN_DEBUG "%s: ", prefix)`` first.
   */
  void v4l_printk_ioctl(const char *prefix, unsigned int cmd);

  struct video_device;

  
  
  /**
   * v4l2_ioctl_get_lock - get the mutex (if any) that it is need to lock for
   *	a given command.
   *
   * @vdev: Pointer to struct &video_device.
   * @cmd: Ioctl name.
   *
   * .. note:: Internal use only. Should not be used outside V4L2 core.
   */
  struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned int cmd);

  /* names for fancy debug output */
  extern const char *v4l2_field_names[];
  extern const char *v4l2_type_names[];

  #ifdef CONFIG_COMPAT

  /**
   * v4l2_compat_ioctl32 -32 Bits compatibility layer for 64 bits processors
   *
   * @file: Pointer to struct &file.
   * @cmd: Ioctl name.
   * @arg: Ioctl argument.
   */
  long int v4l2_compat_ioctl32(struct file *file, unsigned int cmd,
  			     unsigned long arg);

  #endif

  /**
   * typedef v4l2_kioctl - Typedef used to pass an ioctl handler.
   *
   * @file: Pointer to struct &file.
   * @cmd: Ioctl name.
   * @arg: Ioctl argument.
   */
  typedef long (*v4l2_kioctl)(struct file *file, unsigned int cmd, void *arg);

  /**
   * video_usercopy - copies data from/to userspace memory when an ioctl is
   *	issued.
   *
   * @file: Pointer to struct &file.
   * @cmd: Ioctl name.
   * @arg: Ioctl argument.
   * @func: function that will handle the ioctl
   *
   * .. note::
   *
   *    This routine should be used only inside the V4L2 core.
   */
  long int video_usercopy(struct file *file, unsigned int cmd,
  			unsigned long int arg, v4l2_kioctl func);

  /**
   * video_ioctl2 - Handles a V4L2 ioctl.
   *
   * @file: Pointer to struct &file.
   * @cmd: Ioctl name.
   * @arg: Ioctl argument.
   *
   * Method used to hancle an ioctl. Should be used to fill the
   * &v4l2_ioctl_ops.unlocked_ioctl on all V4L2 drivers.
   */
  long int video_ioctl2(struct file *file,
  		      unsigned int cmd, unsigned long int arg);

  #endif /* _V4L2_IOCTL_H */