Expose a separate ACPI description of the SynQuacer eMMC controller
when both ACPI and eMMC support have been enabled in the HII menu.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 Platform/Socionext/DeveloperBox/DeveloperBox.fdf                |  1 +
 Platform/Socionext/SynQuacerEvalBoard/SynQuacerEvalBoard.fdf    |  1 +
 Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/Emmc.asl        | 41 +++++++++++++++
 Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/Emmc.c          | 55 ++++++++++++++++++++
 Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/PlatformDxe.h   |  4 ++
 Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/PlatformDxe.inf |  4 ++
 6 files changed, 106 insertions(+)

diff --git a/Platform/Socionext/DeveloperBox/DeveloperBox.fdf b/Platform/Socionext/DeveloperBox/DeveloperBox.fdf
index 50e385b519d0..7f8708d3a7a9 100644
--- a/Platform/Socionext/DeveloperBox/DeveloperBox.fdf
+++ b/Platform/Socionext/DeveloperBox/DeveloperBox.fdf
@@ -450,6 +450,7 @@ [Rule.Common.DXE_DRIVER]
     PE32         PE32                   $(INF_OUTPUT)/$(MODULE_NAME).efi
     UI           STRING="$(MODULE_NAME)" Optional
     RAW          BIN                    Optional    |.dtb
+    RAW          ASL                    Optional    |.aml
   }
 
 [Rule.Common.DXE_RUNTIME_DRIVER]
diff --git a/Platform/Socionext/SynQuacerEvalBoard/SynQuacerEvalBoard.fdf b/Platform/Socionext/SynQuacerEvalBoard/SynQuacerEvalBoard.fdf
index 20d19120d1b7..3f47781fe979 100644
--- a/Platform/Socionext/SynQuacerEvalBoard/SynQuacerEvalBoard.fdf
+++ b/Platform/Socionext/SynQuacerEvalBoard/SynQuacerEvalBoard.fdf
@@ -419,6 +419,7 @@ [Rule.Common.DXE_DRIVER]
     DXE_DEPEX    DXE_DEPEX              Optional $(INF_OUTPUT)/$(MODULE_NAME).depex
     PE32         PE32                   $(INF_OUTPUT)/$(MODULE_NAME).efi
     UI           STRING="$(MODULE_NAME)" Optional
+    RAW          ASL                    Optional    |.aml
   }
 
 [Rule.Common.DXE_RUNTIME_DRIVER]
diff --git a/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/Emmc.asl b/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/Emmc.asl
new file mode 100644
index 000000000000..4e371befc7b5
--- /dev/null
+++ b/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/Emmc.asl
@@ -0,0 +1,41 @@
+/** @file
+  SSDT describing the SynQuacer eMMC controller
+
+  Copyright (c) 2018, Linaro Ltd. All rights reserved.<BR>
+
+  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.
+
+**/
+
+#include <Platform/MemoryMap.h>
+
+DefinitionBlock ("SsdtEmmc.aml", "SSDT", 1, "SNI", "SynQeMMC",
+                 FixedPcdGet32 (PcdAcpiDefaultOemRevision)) {
+  Scope (_SB) {
+    Device (MMC0) {
+      Name (_HID, "SCX0002")
+      Name (_UID, Zero)
+      Name (_CCA, 1)
+      Name (_CRS, ResourceTemplate () {
+        Memory32Fixed (ReadWrite, SYNQUACER_EMMC_BASE, SYNQUACER_EMMC_BASE_SZ)
+        Interrupt (ResourceConsumer, Level, ActiveHigh, Exclusive) { 184 }
+      })
+
+      Name (_DSD, Package ()  // _DSD: Device-Specific Data
+      {
+        ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+        Package () {
+          Package (2) { "bus-width", 8 },
+          Package (2) { "cap-mmc-highspeed", 0x1 },
+          Package (2) { "fujitsu,cmd-dat-delay-select", 0x1 },
+        }
+      })
+    }
+  } // Scope (_SB)
+}
diff --git a/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/Emmc.c b/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/Emmc.c
index 7284ea6a7cee..e0987c954c74 100644
--- a/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/Emmc.c
+++ b/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/Emmc.c
@@ -59,6 +59,10 @@
 
 STATIC EFI_HANDLE mSdMmcControllerHandle;
 
+STATIC EFI_ACPI_DESCRIPTION_HEADER      *mSsdt;
+STATIC UINTN                            mSsdtSize;
+STATIC VOID                             *mEventRegistration;
+
 /**
 
   Override function for SDHCI capability bits
@@ -182,6 +186,31 @@ STATIC EDKII_SD_MMC_OVERRIDE mSdMmcOverride = {
   SynQuacerSdMmcNotifyPhase,
 };
 
+STATIC
+VOID
+EFIAPI
+InstallAcpiTable (
+  IN EFI_EVENT                      Event,
+  IN VOID*                          Context
+  )
+{
+  UINTN                             TableKey;
+  EFI_STATUS                        Status;
+  EFI_ACPI_TABLE_PROTOCOL           *AcpiTable;
+
+  Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL,
+                  (VOID **)&AcpiTable);
+  if (EFI_ERROR (Status)) {
+    return;
+  }
+
+  Status = AcpiTable->InstallAcpiTable (AcpiTable, mSsdt, mSsdtSize, &TableKey);
+  if (EFI_ERROR (Status)) {
+    DEBUG ((DEBUG_WARN, "%a: failed to install SSDT table for eMMC - %r\n",
+      __FUNCTION__, Status));
+  }
+}
+
 EFI_STATUS
 EFIAPI
 RegisterEmmc (
@@ -190,6 +219,32 @@ RegisterEmmc (
 {
   EFI_STATUS                      Status;
   EFI_HANDLE                      Handle;
+  UINTN                           Index;
+
+  if (mHiiSettings->AcpiPref == ACPIPREF_ACPI) {
+    //
+    // Load the SSDT table from a raw section in this FFS file.
+    //
+    for (Index = 0;; Index++) {
+      Status = GetSectionFromFv (&gEfiCallerIdGuid, EFI_SECTION_RAW, Index,
+                 (VOID **)&mSsdt, &mSsdtSize);
+      if (EFI_ERROR (Status)) {
+        break;
+      }
+
+      if (mSsdt->OemTableId != EMMC_TABLE_ID) {
+        continue;
+      }
+
+      //
+      // Register for the ACPI table protocol
+      //
+      EfiCreateProtocolNotifyEvent (&gEfiAcpiTableProtocolGuid, TPL_CALLBACK,
+        InstallAcpiTable, NULL, &mEventRegistration);
+
+      break;
+    }
+  }
 
   Status = RegisterNonDiscoverableMmioDevice (
              NonDiscoverableDeviceTypeSdhci,
diff --git a/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/PlatformDxe.h b/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/PlatformDxe.h
index a391d2f67c29..c25b7f168a37 100644
--- a/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/PlatformDxe.h
+++ b/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/PlatformDxe.h
@@ -24,6 +24,7 @@
 #include <Library/DebugLib.h>
 #include <Library/DevicePathLib.h>
 #include <Library/DtPlatformDtbLoaderLib.h>
+#include <Library/DxeServicesLib.h>
 #include <Library/HiiLib.h>
 #include <Library/IoLib.h>
 #include <Library/MemoryAllocationLib.h>
@@ -35,10 +36,13 @@
 #include <Platform/MemoryMap.h>
 #include <Platform/Pcie.h>
 #include <Platform/VarStore.h>
+#include <Protocol/AcpiTable.h>
 #include <Protocol/NonDiscoverableDevice.h>
 #include <Protocol/PciIo.h>
 #include <Protocol/SdMmcOverride.h>
 
+#define EMMC_TABLE_ID     SIGNATURE_64('S','y','n','Q','e','M','M','C')
+
 extern UINT8                             PlatformDxeHiiBin[];
 extern UINT8                             PlatformDxeStrings[];
 
diff --git a/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/PlatformDxe.inf b/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/PlatformDxe.inf
index bef7feccd8b8..8df3073bf24b 100644
--- a/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/PlatformDxe.inf
+++ b/Silicon/Socionext/SynQuacer/Drivers/PlatformDxe/PlatformDxe.inf
@@ -23,6 +23,7 @@ [Defines]
   ENTRY_POINT                    = PlatformDxeEntryPoint
 
 [Sources]
+  Emmc.asl
   Emmc.c
   Pci.c
   PlatformDxe.c
@@ -46,6 +47,7 @@ [LibraryClasses]
   DebugLib
   DevicePathLib
   DtPlatformDtbLoaderLib
+  DxeServicesLib
   HiiLib
   IoLib
   MemoryAllocationLib
@@ -69,10 +71,12 @@ [Guids]
 [Protocols]
   gEdkiiNonDiscoverableDeviceProtocolGuid         ## PRODUCES
   gEdkiiSdMmcOverrideProtocolGuid                 ## PRODUCES
+  gEfiAcpiTableProtocolGuid                       ## CONSUMES
   gEfiPciIoProtocolGuid                           ## CONSUMES
   gPcf8563RealTimeClockLibI2cMasterProtocolGuid   ## PRODUCES
 
 [FixedPcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiDefaultOemRevision
   gSynQuacerTokenSpaceGuid.PcdNetsecEepromBase
   gSynQuacerTokenSpaceGuid.PcdNetsecPhyAddress
 
-- 
2.11.0

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