46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/** @file
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PEI Chipset Services Library.
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This file contains only one function that is PeiCsSvcHdaInitHook().
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The function PeiCsSvcHdaInitHook() use chipset services to provide
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a interface for chipset porting on different HDA controller.
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;***************************************************************************
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;* Copyright (c) 2014, Insyde Software Corp. All Rights Reserved.
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;*
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;* You may not reproduce, distribute, publish, display, perform, modify, adapt,
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;* transmit, broadcast, present, recite, release, license or otherwise exploit
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;* any part of this publication in any form, by any means, without the prior
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;* written permission of Insyde Software Corporation.
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;*
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;******************************************************************************
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*/
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#include <Library/IoLib.h>
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#include <Register/HdaRegs.h>
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/**
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To provide a interface for chipset porting on different HDA controller.
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@param[in] HdaBar Base address for HDA
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@return EFI_SUCCESS This function always return successfully
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*/
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EFI_STATUS
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HdaInitHook (
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IN UINT32 HdaBar
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)
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{
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UINT16 Data16;
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//
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// To add your chipset code at here.
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//
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//
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// PCH BIOS Spec Rev 1.1.0 Section 9.1.3 Codec Initialization Programming Sequence
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// Read GCAP and write the same value back to the register once after Controller Reset# bit is set
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//
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Data16 = MmioRead16 (HdaBar + R_HDA_MEM_GCAP);
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MmioOr16 (HdaBar + R_HDA_MEM_GCAP, Data16);
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return EFI_SUCCESS;
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} |