/*
   * Media Bus API header
   *
   * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  
  #ifndef V4L2_MEDIABUS_H
  #define V4L2_MEDIABUS_H

  #include <linux/v4l2-mediabus.h>

  /* Parallel flags */
  /*
   * Can the client run in master or in slave mode. By "Master mode" an operation
   * mode is meant, when the client (e.g., a camera sensor) is producing
   * horizontal and vertical synchronisation. In "Slave mode" the host is
   * providing these signals to the slave.
   */
  #define V4L2_MBUS_MASTER			(1 << 0)
  #define V4L2_MBUS_SLAVE				(1 << 1)

  /*
   * Signal polarity flags
   * Note: in BT.656 mode HSYNC, FIELD, and VSYNC are unused
   * V4L2_MBUS_[HV]SYNC* flags should be also used for specifying
   * configuration of hardware that uses [HV]REF signals
   */

  #define V4L2_MBUS_HSYNC_ACTIVE_HIGH		(1 << 2)
  #define V4L2_MBUS_HSYNC_ACTIVE_LOW		(1 << 3)
  #define V4L2_MBUS_VSYNC_ACTIVE_HIGH		(1 << 4)
  #define V4L2_MBUS_VSYNC_ACTIVE_LOW		(1 << 5)
  #define V4L2_MBUS_PCLK_SAMPLE_RISING		(1 << 6)
  #define V4L2_MBUS_PCLK_SAMPLE_FALLING		(1 << 7)
  #define V4L2_MBUS_DATA_ACTIVE_HIGH		(1 << 8)
  #define V4L2_MBUS_DATA_ACTIVE_LOW		(1 << 9)

  /* FIELD = 0/1 - Field1 (odd)/Field2 (even) */
  #define V4L2_MBUS_FIELD_EVEN_HIGH		(1 << 10)
  /* FIELD = 1/0 - Field1 (odd)/Field2 (even) */
  #define V4L2_MBUS_FIELD_EVEN_LOW		(1 << 11)

  /* Active state of Sync-on-green (SoG) signal, 0/1 for LOW/HIGH respectively. */
  #define V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH	(1 << 12)
  #define V4L2_MBUS_VIDEO_SOG_ACTIVE_LOW		(1 << 13)

  
  /* Serial flags */
  /* How many lanes the client can use */
  #define V4L2_MBUS_CSI2_1_LANE			(1 << 0)
  #define V4L2_MBUS_CSI2_2_LANE			(1 << 1)
  #define V4L2_MBUS_CSI2_3_LANE			(1 << 2)
  #define V4L2_MBUS_CSI2_4_LANE			(1 << 3)
  /* On which channels it can send video data */
  #define V4L2_MBUS_CSI2_CHANNEL_0		(1 << 4)
  #define V4L2_MBUS_CSI2_CHANNEL_1		(1 << 5)
  #define V4L2_MBUS_CSI2_CHANNEL_2		(1 << 6)
  #define V4L2_MBUS_CSI2_CHANNEL_3		(1 << 7)
  /* Does it support only continuous or also non-continuous clock mode */
  #define V4L2_MBUS_CSI2_CONTINUOUS_CLOCK		(1 << 8)
  #define V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK	(1 << 9)
  
  #define V4L2_MBUS_CSI2_LANES		(V4L2_MBUS_CSI2_1_LANE | V4L2_MBUS_CSI2_2_LANE | \
  					 V4L2_MBUS_CSI2_3_LANE | V4L2_MBUS_CSI2_4_LANE)
  #define V4L2_MBUS_CSI2_CHANNELS		(V4L2_MBUS_CSI2_CHANNEL_0 | V4L2_MBUS_CSI2_CHANNEL_1 | \
  					 V4L2_MBUS_CSI2_CHANNEL_2 | V4L2_MBUS_CSI2_CHANNEL_3)
  
  /**
   * v4l2_mbus_type - media bus type
   * @V4L2_MBUS_PARALLEL:	parallel interface with hsync and vsync
   * @V4L2_MBUS_BT656:	parallel interface with embedded synchronisation, can
   *			also be used for BT.1120
   * @V4L2_MBUS_CSI2:	MIPI CSI-2 serial interface
   */
  enum v4l2_mbus_type {
  	V4L2_MBUS_PARALLEL,
  	V4L2_MBUS_BT656,
  	V4L2_MBUS_CSI2,
  };
  
  /**
   * v4l2_mbus_config - media bus configuration
   * @type:	in: interface type
   * @flags:	in / out: configuration flags, depending on @type
   */
  struct v4l2_mbus_config {
  	enum v4l2_mbus_type type;
  	unsigned int flags;
  };

  static inline void v4l2_fill_pix_format(struct v4l2_pix_format *pix_fmt,
  				const struct v4l2_mbus_framefmt *mbus_fmt)
  {
  	pix_fmt->width = mbus_fmt->width;
  	pix_fmt->height = mbus_fmt->height;
  	pix_fmt->field = mbus_fmt->field;
  	pix_fmt->colorspace = mbus_fmt->colorspace;
  }
  
  static inline void v4l2_fill_mbus_format(struct v4l2_mbus_framefmt *mbus_fmt,
  			   const struct v4l2_pix_format *pix_fmt,
  			   enum v4l2_mbus_pixelcode code)
  {
  	mbus_fmt->width = pix_fmt->width;
  	mbus_fmt->height = pix_fmt->height;
  	mbus_fmt->field = pix_fmt->field;
  	mbus_fmt->colorspace = pix_fmt->colorspace;
  	mbus_fmt->code = code;
  }

  #endif