[edk2-platforms/devel-MinPlatform][PATCH v3 1/3] KabylakeSiliconPkg: Add SPI write support in PEI

[Michael Kubacki <michael.a.kubacki@intel.com>]

Adds a new library PeiSpiLib to perform the initialization necessary
to perform SPI write cycles in PEI. After initialization, it installs
an instance of the PCH_SPI_PPI.

Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Chasel Chiu <chasel.chiu@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Kubacki <michael.a.kubacki@intel.com>
---
 Silicon/Intel/KabylakeSiliconPkg/SiPkgPeiLib.dsc   |   3 +-
 .../Pch/Library/PeiSpiLib/PeiSpiLib.inf            |  50 +++++
 .../Pch/Include/Library/SpiLib.h                   |  32 +++
 .../Pch/Library/PeiSpiLib/PeiSpiLib.c              | 221 +++++++++++++++++++++
 .../LibraryPrivate/BasePchSpiCommonLib/SpiCommon.c |   5 +-
 5 files changed, 307 insertions(+), 4 deletions(-)
 create mode 100644 Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiSpiLib/PeiSpiLib.inf
 create mode 100644 Silicon/Intel/KabylakeSiliconPkg/Pch/Include/Library/SpiLib.h
 create mode 100644 Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiSpiLib/PeiSpiLib.c

diff --git a/Silicon/Intel/KabylakeSiliconPkg/SiPkgPeiLib.dsc b/Silicon/Intel/KabylakeSiliconPkg/SiPkgPeiLib.dsc
index b81a736486..bb95ce3888 100644
--- a/Silicon/Intel/KabylakeSiliconPkg/SiPkgPeiLib.dsc
+++ b/Silicon/Intel/KabylakeSiliconPkg/SiPkgPeiLib.dsc
@@ -1,7 +1,7 @@
 ## @file
 #  Component description file for the SkyLake SiPkg PEI libraries.
 #
-# Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2017 - 2019, Intel Corporation. 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.
@@ -30,6 +30,7 @@
 !endif
  ResetSystemLib|$(PLATFORM_SI_PACKAGE)/Pch/Library/PeiResetSystemLib/PeiResetSystemLib.inf
  PchResetLib|$(PLATFORM_SI_PACKAGE)/Pch/Library/PeiPchResetLib/PeiPchResetLib.inf
+ SpiLib|$(PLATFORM_SI_PACKAGE)/Pch/Library/PeiSpiLib/PeiSpiLib.inf
 
 #
 # Cpu
diff --git a/Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiSpiLib/PeiSpiLib.inf b/Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiSpiLib/PeiSpiLib.inf
new file mode 100644
index 0000000000..9240b6ef06
--- /dev/null
+++ b/Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiSpiLib/PeiSpiLib.inf
@@ -0,0 +1,50 @@
+## @file
+# Component description file for PEI PCH SPI Initialization
+#
+# Copyright (c) 2019, Intel Corporation. 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.
+#
+##
+
+[Defines]
+  INF_VERSION     = 0x00010017
+  BASE_NAME       = PeiSpiLib
+  FILE_GUID       = 4998447D-7948-448F-AB75-96E24E18FF23
+  VERSION_STRING  = 1.0
+  MODULE_TYPE     = PEIM
+  LIBRARY_CLASS   = SpiLib|PEIM PEI_CORE
+  #
+  # The following information is for reference only and not required by the build tools.
+  #
+  # VALID_ARCHITECTURES = IA32 X64 IPF
+  #
+
+[LibraryClasses]
+  DebugLib
+  MemoryAllocationLib
+  PcdLib
+  PchCycleDecodingLib
+  PchSpiCommonLib
+  PciSegmentLib
+  PeiServicesLib
+  PeiServicesTablePointerLib
+
+[Packages]
+  MdePkg/MdePkg.dec
+  KabylakeSiliconPkg/SiPkg.dec
+
+[Sources]
+  PeiSpiLib.c
+
+[Pcd]
+  gSiPkgTokenSpaceGuid.PcdAcpiBaseAddress       ## CONSUMES
+
+[Ppis]
+  gPchSpiPpiGuid      ## PRODUCES
diff --git a/Silicon/Intel/KabylakeSiliconPkg/Pch/Include/Library/SpiLib.h b/Silicon/Intel/KabylakeSiliconPkg/Pch/Include/Library/SpiLib.h
new file mode 100644
index 0000000000..6af66f8869
--- /dev/null
+++ b/Silicon/Intel/KabylakeSiliconPkg/Pch/Include/Library/SpiLib.h
@@ -0,0 +1,32 @@
+/** @file
+  Library to initialize SPI services for future SPI accesses.
+
+Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials are licensed and made available under
+the terms and conditions of the BSD License that 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.
+
+**/
+
+#ifndef _SPI_LIB_H_
+#define _SPI_LIB_H_
+
+/**
+  Initializes SPI for access from future services.
+
+  @retval EFI_SUCCESS         The SPI service was initialized successfully.
+  @retval EFI_OUT_OF_RESOUCES Insufficient memory available to allocate structures required for initialization.
+  @retval Others              An error occurred initializing SPI services.
+
+**/
+EFI_STATUS
+EFIAPI
+SpiServiceInit (
+  VOID
+  );
+
+#endif
diff --git a/Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiSpiLib/PeiSpiLib.c b/Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiSpiLib/PeiSpiLib.c
new file mode 100644
index 0000000000..954317cd40
--- /dev/null
+++ b/Silicon/Intel/KabylakeSiliconPkg/Pch/Library/PeiSpiLib/PeiSpiLib.c
@@ -0,0 +1,221 @@
+/** @file
+  PCH SPI PEI Library implements the SPI Host Controller Interface.
+
+Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials are licensed and made available under
+the terms and conditions of the BSD License that 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 <PchReservedResources.h>
+#include <IndustryStandard/Pci30.h>
+#include <Ppi/Spi.h>
+#include <Register/PchRegsLpc.h>
+#include <Register/PchRegsSpi.h>
+#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
+#include <Library/PchCycleDecodingLib.h>
+#include <Library/PchSpiCommonLib.h>
+#include <Library/PciSegmentLib.h>
+#include <Library/PeiServicesLib.h>
+
+typedef struct {
+  EFI_PEI_PPI_DESCRIPTOR  PpiDescriptor;
+  SPI_INSTANCE            SpiInstance;
+} PEI_SPI_INSTANCE;
+
+/**
+  Initializes the SPI BAR0 value to a default value and enables memory space decoding.
+
+  The SPI BAR0 will be assigned later in PCI enumeration.
+
+**/
+VOID
+InitSpiBar0 (
+  VOID
+  )
+{
+  UINT64       PchSpiBase;
+  PchSpiBase = PCI_SEGMENT_LIB_ADDRESS (
+                 0,
+                 0,
+                 PCI_DEVICE_NUMBER_PCH_SPI,
+                 PCI_FUNCTION_NUMBER_PCH_SPI,
+                 0
+                 );
+  PciSegmentWrite32 (PchSpiBase + R_PCH_SPI_BAR0, PCH_SPI_BASE_ADDRESS);
+  PciSegmentOr32 (PchSpiBase + PCI_COMMAND_OFFSET, EFI_PCI_COMMAND_MEMORY_SPACE);
+}
+
+/**
+  Initializes SPI for access from future services.
+
+  @retval EFI_SUCCESS         The SPI service was initialized successfully.
+  @retval EFI_OUT_OF_RESOUCES Insufficient memory available to allocate structures required for initialization.
+  @retval Others              An error occurred initializing SPI services.
+
+**/
+EFI_STATUS
+EFIAPI
+SpiServiceInit (
+  VOID
+  )
+{
+  EFI_STATUS        Status;
+  PEI_SPI_INSTANCE  *PeiSpiInstance;
+  SPI_INSTANCE      *SpiInstance;
+  PCH_SPI_PPI       *SpiPpi;
+  UINT16            AcpiBase;
+
+  AcpiBase = 0;
+
+  Status = PeiServicesLocatePpi (
+             &gPchSpiPpiGuid,
+             0,
+             NULL,
+             (VOID **) &SpiPpi
+             );
+
+  if (Status != EFI_SUCCESS) {
+    PchAcpiBaseGet (&AcpiBase);
+    if (AcpiBase == 0) {
+      PchAcpiBaseSet (PcdGet16 (PcdAcpiBaseAddress));
+    }
+
+    //
+    // Prior to PCI enumeration, initialize SPI BAR0 to a default value
+    // and also enable memory space decoding for SPI
+    //
+    InitSpiBar0 ();
+
+    PeiSpiInstance = (PEI_SPI_INSTANCE *) AllocateZeroPool (sizeof (PEI_SPI_INSTANCE));
+    if (NULL == PeiSpiInstance) {
+      return EFI_OUT_OF_RESOURCES;
+    }
+
+    SpiInstance = &(PeiSpiInstance->SpiInstance);
+    SpiProtocolConstructor (SpiInstance);
+
+    PeiSpiInstance->PpiDescriptor.Flags = EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST;
+    PeiSpiInstance->PpiDescriptor.Guid = &gPchSpiPpiGuid;
+    PeiSpiInstance->PpiDescriptor.Ppi = &(SpiInstance->SpiProtocol);
+
+    Status = PeiServicesInstallPpi (&PeiSpiInstance->PpiDescriptor);
+  }
+  return Status;
+}
+
+/**
+  Acquires the PCH SPI BAR0 MMIO address.
+
+  @param[in] SpiInstance          Pointer to SpiInstance to initialize
+
+  @retval    UINTN                The SPIO BAR0 MMIO address
+
+**/
+UINTN
+AcquireSpiBar0 (
+  IN  SPI_INSTANCE                *SpiInstance
+  )
+{
+  return MmioRead32 (SpiInstance->PchSpiBase + R_PCH_SPI_BAR0) & ~(B_PCH_SPI_BAR0_MASK);
+}
+
+/**
+  Release the PCH SPI BAR0 MMIO address.
+
+  @param[in] SpiInstance          Pointer to SpiInstance to initialize
+
+  @retval None
+**/
+VOID
+ReleaseSpiBar0 (
+  IN  SPI_INSTANCE                *SpiInstance
+  )
+{
+  return;
+}
+
+/**
+  Disables BIOS Write Protect
+
+  @retval EFI_SUCCESS             BIOS Write Protect was disabled successfully
+
+**/
+EFI_STATUS
+EFIAPI
+DisableBiosWriteProtect (
+  VOID
+  )
+{
+  UINT64  SpiBaseAddress;
+
+  SpiBaseAddress =  PCI_SEGMENT_LIB_ADDRESS (
+                      0,
+                      0,
+                      PCI_DEVICE_NUMBER_PCH_SPI,
+                      PCI_FUNCTION_NUMBER_PCH_SPI,
+                      0
+                      );
+  //
+  // Clear EISS bit to allow for SPI use
+  //
+  PciSegmentAnd8 (SpiBaseAddress + R_PCH_SPI_BC, (UINT8) ~B_PCH_SPI_BC_EISS);
+
+  //
+  // Write clear BC_SYNC_SS prior to change WPD from 0 to 1.
+  //
+  PciSegmentOr8 (
+    SpiBaseAddress + R_PCH_SPI_BC + 1,
+    (B_PCH_SPI_BC_SYNC_SS >> 8)
+    );
+
+  //
+  // Set BIOSWE bit (SPI PCI Offset DCh [0]) = 1b
+  // Enable the access to the BIOS space for both read and write cycles
+  //
+  PciSegmentOr8 (
+    SpiBaseAddress + R_PCH_SPI_BC,
+    B_PCH_SPI_BC_WPD
+    );
+
+  ASSERT ((PciSegmentRead8 (SpiBaseAddress + R_PCH_SPI_BC) & B_PCH_SPI_BC_EISS) != 0);
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Enables BIOS Write Protect
+
+**/
+VOID
+EFIAPI
+EnableBiosWriteProtect (
+  VOID
+  )
+{
+  UINT64  SpiBaseAddress;
+
+  SpiBaseAddress =  PCI_SEGMENT_LIB_ADDRESS (
+                      0,
+                      0,
+                      PCI_DEVICE_NUMBER_PCH_SPI,
+                      PCI_FUNCTION_NUMBER_PCH_SPI,
+                      0
+                      );
+
+  //
+  // Disable the access to the BIOS space for write cycles
+  //
+  PciSegmentAnd8 (
+    SpiBaseAddress + R_PCH_SPI_BC,
+    (UINT8) (~B_PCH_SPI_BC_WPD)
+    );
+}
diff --git a/Silicon/Intel/KabylakeSiliconPkg/Pch/LibraryPrivate/BasePchSpiCommonLib/SpiCommon.c b/Silicon/Intel/KabylakeSiliconPkg/Pch/LibraryPrivate/BasePchSpiCommonLib/SpiCommon.c
index 46184d4994..0b708d4aad 100644
--- a/Silicon/Intel/KabylakeSiliconPkg/Pch/LibraryPrivate/BasePchSpiCommonLib/SpiCommon.c
+++ b/Silicon/Intel/KabylakeSiliconPkg/Pch/LibraryPrivate/BasePchSpiCommonLib/SpiCommon.c
@@ -1,7 +1,7 @@
 /** @file
   PCH SPI Common Driver implements the SPI Host Controller Compatibility Interface.
 
-Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2017 - 2019, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials are licensed and made available under
 the terms and conditions of the BSD License that accompanies this distribution.
 The full text of the license may be found at
@@ -760,9 +760,8 @@ SendSpiCmd (
   Status            = EFI_SUCCESS;
   SpiInstance       = SPI_INSTANCE_FROM_SPIPROTOCOL (This);
   SpiBaseAddress    = SpiInstance->PchSpiBase;
-  PchSpiBar0        = AcquireSpiBar0 (SpiInstance);
-  SpiBaseAddress    = SpiInstance->PchSpiBase;
   ABase             = SpiInstance->PchAcpiBase;
+  PchSpiBar0        = AcquireSpiBar0 (SpiInstance);
 
   //
   // Disable SMIs to make sure normal mode flash access is not interrupted by an SMI
-- 
2.16.2.windows.1