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/** @file
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Initializes the PCH HD Audio ACPI Tables.
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Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/DebugLib.h>
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#include <Library/IoLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/PciSegmentLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/UefiLib.h>
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#include <Protocol/AcpiTable.h>
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#include <DxeHdaNhlt.h>
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#include <Library/DxeHdaNhltLib.h>
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#include "PchInit.h"
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#include <HdAudioConfig.h>
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#include <PchConfigHob.h>
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#include <Library/PcdLib.h>
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#include <Protocol/PchPolicy.h>
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#include <HdAudioConfig.h>
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#include <IndustryStandard/Pci30.h>
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#include <Register/PchRegs.h>
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#include <Library/PchPciBdfLib.h>
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#include <Library/PchInfoLib.h>
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#define XTAL_FREQ_38P4MHZ 1
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/**
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Retrieves address of NHLT table from XSDT/RSDT.
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@retval NHLT_ACPI_TABLE* Pointer to NHLT table if found
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@retval NULL NHLT could not be found
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**/
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NHLT_ACPI_TABLE *
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LocateNhltAcpiTable (
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VOID
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)
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{
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EFI_ACPI_3_0_ROOT_SYSTEM_DESCRIPTION_POINTER *Rsdp;
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EFI_ACPI_DESCRIPTION_HEADER *Xsdt;
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NHLT_ACPI_TABLE *Nhlt;
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UINTN Index;
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UINT64 Data64;
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EFI_STATUS Status;
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Rsdp = NULL;
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Xsdt = NULL;
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Nhlt = NULL;
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///
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/// Find the AcpiSupport protocol returns RSDP (or RSD PTR) address.
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///
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DEBUG ((DEBUG_INFO, "LocateNhltAcpiTable() Start\n"));
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Status = EfiGetSystemConfigurationTable (&gEfiAcpiTableGuid, (VOID *) &Rsdp);
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if (EFI_ERROR (Status) || (Rsdp == NULL)) {
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DEBUG ((DEBUG_ERROR, "EFI_ERROR or Rsdp == NULL\n"));
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return NULL;
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}
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Xsdt = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) Rsdp->XsdtAddress;
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if (Xsdt == NULL || Xsdt->Signature != EFI_ACPI_5_0_EXTENDED_SYSTEM_DESCRIPTION_TABLE_SIGNATURE) {
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// If XSDT has not been found, check RSDT
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Xsdt = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) Rsdp->RsdtAddress;
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if (Xsdt == NULL || Xsdt->Signature != EFI_ACPI_5_0_ROOT_SYSTEM_DESCRIPTION_TABLE_SIGNATURE) {
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DEBUG ((DEBUG_ERROR, "XSDT/RSDT == NULL or wrong signature\n"));
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return NULL;
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}
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}
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for (Index = sizeof (EFI_ACPI_DESCRIPTION_HEADER); Index < Xsdt->Length; Index = Index + sizeof (UINT64)) {
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Data64 = *(UINT64 *) ((UINT8 *) Xsdt + Index);
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Nhlt = (NHLT_ACPI_TABLE *) (UINTN) Data64;
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if (Nhlt != NULL && Nhlt->Header.Signature == NHLT_ACPI_TABLE_SIGNATURE) {
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break;
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}
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Nhlt = NULL;
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}
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if (Nhlt == NULL || Nhlt->Header.Signature != NHLT_ACPI_TABLE_SIGNATURE) {
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DEBUG ((DEBUG_ERROR, "Nhlt == NULL or wrong signature\n"));
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return NULL;
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}
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DEBUG ((DEBUG_INFO, "Found NhltTable, Address = 0x%016x\n", Nhlt));
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return Nhlt;
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}
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/**
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Sets NVS ACPI variables for HDAS._DSM and SNDW._DSD accordingly to policy.
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@param[in] NhltAcpiTableAddress
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@param[in] NhltAcpiTableLength
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@param[in] *HdAudioConfigHob
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@param[in] *HdAudioDxeConfig
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**/
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VOID
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UpdateHdaAcpiData (
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IN UINT64 NhltAcpiTableAddress,
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IN UINT32 NhltAcpiTableLength,
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IN CONST HDAUDIO_HOB *HdAudioConfigHob,
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IN CONST HDAUDIO_DXE_CONFIG *HdAudioDxeConfig
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)
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{
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DEBUG ((DEBUG_INFO, "UpdateHdaAcpiData():\n NHLT Address = 0x%016x, Length = 0x%08x\n", NhltAcpiTableAddress, NhltAcpiTableLength));
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DEBUG ((DEBUG_INFO, " FeatureMask = 0x%08x\n", HdAudioDxeConfig->DspFeatureMask));
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mPchNvsAreaProtocol.Area->XTAL = XTAL_FREQ_38P4MHZ;
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mPchNvsAreaProtocol.Area->NHLA = NhltAcpiTableAddress;
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mPchNvsAreaProtocol.Area->NHLL = NhltAcpiTableLength;
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mPchNvsAreaProtocol.Area->ADFM = HdAudioDxeConfig->DspFeatureMask;
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if (HdAudioConfigHob->DspEnable || HdAudioConfigHob->DspUaaCompliance == FALSE) {
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mPchNvsAreaProtocol.Area->SWQ0 = HdAudioConfigHob->AudioLinkSndw1 ? 0 : BIT1;
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mPchNvsAreaProtocol.Area->SWQ1 = HdAudioConfigHob->AudioLinkSndw2 ? 0 : BIT1;
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mPchNvsAreaProtocol.Area->SWQ2 = HdAudioConfigHob->AudioLinkSndw3 ? 0 : BIT1;
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mPchNvsAreaProtocol.Area->SWQ3 = HdAudioConfigHob->AudioLinkSndw4 ? 0 : BIT1;
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} else {
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mPchNvsAreaProtocol.Area->SWQ0 = BIT1;
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mPchNvsAreaProtocol.Area->SWQ1 = BIT1;
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mPchNvsAreaProtocol.Area->SWQ2 = BIT1;
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mPchNvsAreaProtocol.Area->SWQ3 = BIT1;
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}
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mPchNvsAreaProtocol.Area->SWMC = GetPchHdaMaxSndwLinkNum ();
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mPchNvsAreaProtocol.Area->ACS0 = (UINT8)HdAudioDxeConfig->SndwConfig[0].AutonomousClockStop;
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mPchNvsAreaProtocol.Area->ACS1 = (UINT8)HdAudioDxeConfig->SndwConfig[1].AutonomousClockStop;
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mPchNvsAreaProtocol.Area->ACS2 = (UINT8)HdAudioDxeConfig->SndwConfig[2].AutonomousClockStop;
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mPchNvsAreaProtocol.Area->ACS3 = (UINT8)HdAudioDxeConfig->SndwConfig[3].AutonomousClockStop;
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mPchNvsAreaProtocol.Area->DAI0 = (UINT8)HdAudioDxeConfig->SndwConfig[0].DataOnActiveIntervalSelect;
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mPchNvsAreaProtocol.Area->DAI1 = (UINT8)HdAudioDxeConfig->SndwConfig[1].DataOnActiveIntervalSelect;
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mPchNvsAreaProtocol.Area->DAI2 = (UINT8)HdAudioDxeConfig->SndwConfig[2].DataOnActiveIntervalSelect;
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mPchNvsAreaProtocol.Area->DAI3 = (UINT8)HdAudioDxeConfig->SndwConfig[3].DataOnActiveIntervalSelect;
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mPchNvsAreaProtocol.Area->DOD0 = (UINT8)HdAudioDxeConfig->SndwConfig[0].DataOnDelaySelect;
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mPchNvsAreaProtocol.Area->DOD1 = (UINT8)HdAudioDxeConfig->SndwConfig[1].DataOnDelaySelect;
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mPchNvsAreaProtocol.Area->DOD2 = (UINT8)HdAudioDxeConfig->SndwConfig[2].DataOnDelaySelect;
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mPchNvsAreaProtocol.Area->DOD3 = (UINT8)HdAudioDxeConfig->SndwConfig[3].DataOnDelaySelect;
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}
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/**
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Initialize Intel High Definition Audio ACPI Tables
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@retval EFI_SUCCESS The function completed successfully
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@retval EFI_LOAD_ERROR ACPI table cannot be installed
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@retval EFI_UNSUPPORTED ACPI table not set because DSP is disabled
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**/
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EFI_STATUS
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PchHdAudioAcpiInit (
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VOID
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)
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{
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EFI_STATUS Status;
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UINT64 HdaPciBase;
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CONST HDAUDIO_HOB *HdAudioConfigHob;
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PCH_POLICY_PROTOCOL *PchPolicy;
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HDAUDIO_DXE_CONFIG *HdAudioDxeConfig;
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NHLT_ACPI_TABLE *NhltTable;
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DEBUG ((DEBUG_INFO, "PchHdAudioAcpiInit() Start\n"));
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HdAudioConfigHob = &mPchConfigHob->HdAudio;
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///
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/// Get PCH Policy Protocol
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///
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Status = gBS->LocateProtocol (&gPchPolicyProtocolGuid, NULL, (VOID **)&PchPolicy);
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ASSERT_EFI_ERROR (Status);
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///
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/// Get HD Audio DXE Config Block
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///
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Status = GetConfigBlock ((VOID *)PchPolicy, &gHdAudioDxeConfigGuid, (VOID *)&HdAudioDxeConfig);
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ASSERT_EFI_ERROR (Status);
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HdaPciBase = HdaPciCfgBase ();
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if ((PciSegmentRead16 (HdaPciBase + PCI_VENDOR_ID_OFFSET) == 0xFFFF) || (HdAudioConfigHob->DspEnable == FALSE)) {
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// Do not set ACPI tables if HDAudio is Function disabled or DSP is disabled
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DEBUG ((DEBUG_INFO, "AudioDSP: Non-HDAudio ACPI Table (NHLT) not set!\n"));
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return EFI_UNSUPPORTED;
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}
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NhltTable = LocateNhltAcpiTable ();
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if (NhltTable == NULL) {
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return EFI_LOAD_ERROR;
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}
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UpdateHdaAcpiData ((UINT64) (UINTN) NhltTable, (UINT32) (NhltTable->Header.Length), HdAudioConfigHob, HdAudioDxeConfig);
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DEBUG_CODE ( NhltAcpiTableDump (NhltTable); );
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DEBUG ((DEBUG_INFO, "PchHdAudioAcpiInit() End - Status = %r\n", Status));
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return Status;
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}
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