/*++
  This file contains an 'Intel Peripheral Driver' and uniquely
  identified as "Intel Reference Module" and is
  licensed for Intel CPUs and chipsets under the terms of your
  license agreement with Intel or your vendor.  This file may
  be modified by the user, subject to additional terms of the
  license agreement
--*/

/*++

Copyright (c)  1999 - 2012 Intel Corporation. All rights reserved
This software and associated documentation (if any) is furnished
under a license and may only be used or copied in accordance
with the terms of the license. Except as permitted by such
license, no part of this software or documentation may be
reproduced, stored in a retrieval system, or transmitted in any
form or by any means without the express written consent of
Intel Corporation.


Module Name:

  IgdOGBDA.ASL

Abstract:

  IGD OpRegion/Software SCI Reference Code.
  This file contains Get BIOS Data Area funciton support for
  the Integrated Graphics Device (IGD) OpRegion/Software SCI mechanism.

--*/


Method (GBDA, 0, Serialized)
{

  // Supported calls: Sub-function 0

  If (LEqual(GESF, 0))
  {
    //<TODO> Update implementation specific supported calls.  Reference
    // code is set to Intel's validated implementation.

    Store(0x0000659, PARM)

    Store(Zero, GESF)		// Clear the exit parameter
    Return(SUCC)			// Success
  }

  // Requested callbacks: Sub-function 1

  If (LEqual(GESF, 1))
  {

    //<TODO> Update implementation specific system BIOS requested call
    // back functions.  Call back functions are where the driver calls the
    // system BIOS at function indicated event.

    Store(0x300482, PARM)
    If(LEqual(S0ID, One)){
      Or(PARM, 0x100, PARM) //Request Fn 8 callback in CS systems
    }
    Store(Zero, GESF)		// Clear the exit parameter
    Return(SUCC)			// Success
  }

  // Get Boot display Preferences: Sub-function 4

  If (LEqual(GESF, 4))
  {

    //<TODO> Update the implementation specific Get Boot Display
    // Preferences function.

    And(PARM, 0xEFFF0000, PARM)	// PARM[30:16] = Boot device ports
    And(PARM, ShiftLeft(DeRefOf(Index(DBTB, IBTT)), 16), PARM)
    Or(IBTT, PARM, PARM)		// PARM[7:0] = Boot device type

    Store(Zero, GESF)		// Clear the exit parameter
    Return(SUCC)			// Success
  }

  // Panel details: Sub-function 5

  If (LEqual(GESF, 5))
  {

    //<TODO> Update the implementation specific Get Panel Details
    // function.

    Store(IPSC, PARM)		// Report the scaling setting
    Or(PARM, ShiftLeft(IPAT, 8), PARM)
    Add(PARM, 0x100, PARM)		// Adjust panel type, 0 = VBT default
    Or(PARM, ShiftLeft(LIDS, 16), PARM) // Report the lid state
    Add(PARM, 0x10000, PARM)	// Adjust the lid state, 0 = Unknown
    Or(PARM, ShiftLeft(IBIA, 20), PARM) // Report the BIA setting
    Store(Zero, GESF)
    Return(SUCC)
  }

  // Internal graphics: Sub-function 7

  If (LEqual(GESF, 7))
  {
    Store(GIVD, PARM)		// PARM[0]      - VGA mode(1=VGA)
    Xor(PARM, 1, PARM)		// Invert the VGA mode polarity
    Or(PARM, ShiftLeft(GMFN, 1), PARM) // PARM[1]   - # IGD PCI functions-1
                                       // PARM[3:2]    - Reserved
                                       // PARM[4]      - IGD D3 support(0=cold)
                                       // PARM[10:5]   - Reserved
    Or(PARM, ShiftLeft(3, 11), PARM) // PARM[12:11] - DVMT mode(11b = 5.0)

    //
    // Report DVMT 5.0 Total Graphics memory size.
    //
    Or(PARM, ShiftLeft(IDMS, 17), PARM)   // Bits 20:17 are for Gfx total memory size

    // If the "Set Internal Graphics" call is supported, the modified
    // settings flag must be programmed per the specification.  This means
    // that the flag must be set to indicate that system BIOS requests
    // these settings.  Once "Set Internal Graphics" is called, the
    //  modified settings flag must be cleared on all subsequent calls to
    // this function.

    // Report the graphics frequency based on B0:D2:F0:RF0h[12].  Must
    // take into account the current VCO.

    Or(ShiftLeft(Derefof(Index(Derefof(Index(CDCT, HVCO)), CDVL)), 21),PARM, PARM)

    Store(1, GESF)			// Set the modified settings flag
    Return(SUCC)
  }

  // Spread spectrum clocks: Sub-function 10

  If (LEqual(GESF, 10))
  {

    Store(0, PARM)			// Assume SSC is disabled

    If(ISSC)
    {
      Or(PARM, 3, PARM)	// If SSC enabled, return SSC1+Enabled
    }

    Store(0, GESF)			// Set the modified settings flag
    Return(SUCC)			// Success
  }


  If (LEqual(GESF, 11))
  {
    Store(KSV0, PARM)		// First four bytes of AKSV
    Store(KSV1, GESF)		// Fifth byte of AKSV

    Return(SUCC)			// Success
  }

  // A call to a reserved "Get BIOS data" function was received.

  Store(Zero, GESF)			// Clear the exit parameter
  Return(CRIT)				// Reserved, "Critical failure"
}