vesabiosextensions.h

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/*++

Copyright (c) 2006, Intel Corporation                                                         
All rights reserved. This program and the accompanying materials                          
are licensed and made available under the terms and conditions of the BSD License         
which accompanies this distribution.  The full text of the license may be found at        
http://opensource.org/licenses/bsd-license.php                                            
                                                                                          
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             

Module Name:

  VesaBiosExtensions.h

Abstract:

Revision History

--*/

#ifndef _VESA_BIOS_EXTENSIONS_H
#define _VESA_BIOS_EXTENSIONS_H

//
// Turn on byte packing of data structures
//
#pragma pack(1)
//
// VESA BIOS Extensions status codes
//
#define VESA_BIOS_EXTENSIONS_STATUS_SUCCESS 0x004f

//
// VESA BIOS Extensions Services
//
#define VESA_BIOS_EXTENSIONS_RETURN_CONTROLLER_INFORMATION  0x4f00

/*++

  Routine Description:
    Function 00 : Return Controller Information

  Arguments:
    Inputs:
      AX    = 0x4f00
      ES:DI = Pointer to buffer to place VESA_BIOS_EXTENSIONS_INFORMATION_BLOCK structure
    Outputs:
      AX    = Return Status

--*/
#define VESA_BIOS_EXTENSIONS_RETURN_MODE_INFORMATION  0x4f01

/*++

  Routine Description:
    Function 01 : Return Mode Information

  Arguments:
    Inputs:
      AX    = 0x4f01
      CX    = Mode Number
      ES:DI = Pointer to buffer to place VESA_BIOS_EXTENSIONS_MODE_INFORMATION_BLOCK structure
    Outputs:
      AX    = Return Status

--*/
#define VESA_BIOS_EXTENSIONS_SET_MODE 0x4f02

/*++

  Routine Description:
    Function 02 : Set Mode

  Arguments:
    Inputs:
      AX    = 0x4f02
      BX    = Desired mode to set
        D0-D8   = Mode Number
        D9-D10  = Reserved (must be 0)
        D11     = 0 - Use current default refresh rate
                = 1 - Use user specfieid CRTC values for refresh rate
        D12-D13 = Reserved (must be 0)
        D14     = 0 - Use windowed frame buffer model
                = 1 - Use linear/flat frame buffer model
        D15     = 0 - Clear display memory
                = 1 - Don't clear display memory
      ES:DI = Pointer to buffer to the VESA_BIOS_EXTENSIONS_CRTC_INFORMATION_BLOCK structure
    Outputs:
      AX    = Return Status

--*/
#define VESA_BIOS_EXTENSIONS_RETURN_CURRENT_MODE  0x4f03

/*++

  Routine Description:
    Function 03 : Return Current Mode

  Arguments:
    Inputs:
      AX    = 0x4f03
    Outputs:
      AX    = Return Status
      BX    = Current mode
        D0-D13  = Mode Number
        D14     = 0 - Windowed frame buffer model
                = 1 - Linear/flat frame buffer model
        D15     = 0 - Memory cleared at last mode set
                = 1 - Memory not cleared at last mode set

--*/
#define VESA_BIOS_EXTENSIONS_SAVE_RESTORE_STATE 0x4f04

/*++

  Routine Description:
    Function 04 : Save/Restore State

  Arguments:
    Inputs:
      AX    = 0x4f03
      DL    = 0x00 - Return Save/Restore State buffer size
            = 0x01 - Save State
            = 0x02 - Restore State
      CX    = Requested Status
        D0  = Save/Restore controller hardware state
        D1  = Save/Restore BIOS data state
        D2  = Save/Restore DAC state
        D3  = Save/Restore Regsiter state
      ES:BX = Pointer to buffer if DL=1 or DL=2
    Outputs:
      AX    = Return Status
      BX    = Number of 64 byte blocks to hold the state buffer if DL=0

--*/
#define VESA_BIOS_EXTENSIONS_EDID  0x4f15

/*++

  Routine Description:
    Function 15 : implement VBE/DDC service

  Arguments:
    Inputs:
      AX    = 0x4f15
      BL    = 0x00 - Report VBE/DDC Capabilities
      CX    = 0x00 - Controller unit number (00 = primary controller)
      ES:DI = Null pointer, must be 0:0 in version 1.0
    Outputs:
      AX    = Return Status
      BH    = Approx. time in seconds, rounded up, to transfer one EDID block(128 bytes)
      BL    = DDC level supported
        D0  = 0 DDC1 not supported
            = 1 DDC1 supported
        D1  = 0 DDC2 not supported
            = 1 DDC2 supported
        D2  = 0 Screen not blanked during data transfer
            = 1 Screen blanked during data transfer

    Inputs:
      AX    = 0x4f15
      BL    = 0x01 - Read EDID
      CX    = 0x00 - Controller unit number (00 = primary controller)
      DX    = 0x00 - EDID block number
      ES:DI = Pointer to buffer in which the EDID block is returned
    Outputs:
      AX    = Return Status
--*/

//
// Timing data from EDID data block
//
#define VESA_BIOS_EXTENSIONS_EDID_BLOCK_SIZE                    128
#define VESA_BIOS_EXTENSIONS_EDID_ESTABLISHED_TIMING_MAX_NUMBER 17

typedef struct {
  UINT16  HorizontalResolution;
  UINT16  VerticalResolution;
  UINT16  RefreshRate;
} VESA_BIOS_EXTENSIONS_EDID_TIMING;

typedef struct {
  UINT32  ValidNumber;
  UINT32  Key[VESA_BIOS_EXTENSIONS_EDID_ESTABLISHED_TIMING_MAX_NUMBER];
} VESA_BIOS_EXTENSIONS_VALID_EDID_TIMING;

typedef struct {
  UINT8   Header[8];                        //EDID header "00 FF FF FF FF FF FF 00"
  UINT16  ManufactureName;                  //EISA 3-character ID
  UINT16  ProductCode;                      //Vendor assigned code
  UINT32  SerialNumber;                     //32-bit serial number
  UINT8   WeekOfManufacture;                //Week number
  UINT8   YearOfManufacture;                //Year
  UINT8   EdidVersion;                      //EDID Structure Version
  UINT8   EdidRevision;                     //EDID Structure Revision
  UINT8   VideoInputDefinition;
  UINT8   MaxHorizontalImageSize;           //cm
  UINT8   MaxVerticalImageSize;             //cm
  UINT8   DisplayTransferCharacteristic;
  UINT8   FeatureSupport;
  UINT8   RedGreenLowBits;                  //Rx1 Rx0 Ry1 Ry0 Gx1 Gx0 Gy1Gy0
  UINT8   BlueWhiteLowBits;                 //Bx1 Bx0 By1 By0 Wx1 Wx0 Wy1 Wy0
  UINT8   RedX;                             //Red-x Bits 9 - 2
  UINT8   RedY;                             //Red-y Bits 9 - 2
  UINT8   GreenX;                           //Green-x Bits 9 - 2
  UINT8   GreenY;                           //Green-y Bits 9 - 2
  UINT8   BlueX;                            //Blue-x Bits 9 - 2
  UINT8   BlueY;                            //Blue-y Bits 9 - 2
  UINT8   WhiteX;                           //White-x Bits 9 - 2
  UINT8   WhiteY;                           //White-x Bits 9 - 2
  UINT8   EstablishedTimings[3];
  UINT8   StandardTimingIdentification[16];
  UINT8   DetailedTimingDescriptions[72];
  UINT8   ExtensionFlag;                    //Number of (optional) 128-byte EDID extension blocks to follow
  UINT8   Checksum;
} VESA_BIOS_EXTENSIONS_EDID_DATA_BLOCK;

//
// Super VGA Information Block
//
typedef struct {
  UINT32  VESASignature;      // 'VESA' 4 byte signature
  UINT16  VESAVersion;        // VBE version number
  UINT32  OEMStringPtr;       // Pointer to OEM string
  UINT32  Capabilities;       // Capabilities of video card
  UINT32  VideoModePtr;       // Pointer to an array of 16-bit supported modes values terminated by 0xFFFF
  UINT16  TotalMemory;        // Number of 64kb memory blocks
  UINT16  OemSoftwareRev;     // VBE implementation Software revision