1 files changed, 107 insertions, 0 deletions
diff --git a/SecurityPkg/Tcg/TrEEConfig/TpmDetection.c b/SecurityPkg/Tcg/TrEEConfig/TpmDetection.c
new file mode 100644
index 000000000..b8aab1ffd
--- /dev/null
+++ b/SecurityPkg/Tcg/TrEEConfig/TpmDetection.c
@@ -0,0 +1,107 @@
+/** @file
+  TPM1.2/dTPM2.0 auto detection.
+
+Copyright (c) 2013, 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.
+
+**/
+
+
+#include <PiPei.h>
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/IoLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PeiServicesLib.h>
+#include <Library/PcdLib.h>
+#include <Library/Tpm12DeviceLib.h>
+#include <Library/Tpm12CommandLib.h>
+#include <IndustryStandard/Tpm12.h>
+
+#include "TrEEConfigNvData.h"
+
+/**
+  This routine return if dTPM (1.2 or 2.0) present.
+
+  @retval TRUE  dTPM present
+  @retval FALSE dTPM not present
+**/
+BOOLEAN
+IsDtpmPresent (
+  VOID
+  )
+{
+  UINT8                             RegRead;
+  
+  RegRead = MmioRead8 ((UINTN)PcdGet64 (PcdTpmBaseAddress));
+  if (RegRead == 0xFF) {
+    DEBUG ((EFI_D_ERROR, "DetectTpmDevice: Dtpm not present\n"));
+    return FALSE;
+  } else {
+    DEBUG ((EFI_D_ERROR, "DetectTpmDevice: Dtpm present\n"));
+    return TRUE;
+  }
+}
+
+/**
+  This routine check both SetupVariable and real TPM device, and return final TpmDevice configuration.
+
+  @param  SetupTpmDevice  TpmDevice configuration in setup driver
+
+  @return TpmDevice configuration
+**/
+UINT8
+DetectTpmDevice (
+  IN UINT8 SetupTpmDevice
+  )
+{
+  EFI_STATUS                        Status;
+  EFI_BOOT_MODE                     BootMode;
+
+  Status = PeiServicesGetBootMode (&BootMode);
+  ASSERT_EFI_ERROR (Status);
+
+  //
+  // In S3, we rely on Setup option, because we save to Setup in normal boot.
+  //
+  if (BootMode == BOOT_ON_S3_RESUME) {
+    DEBUG ((EFI_D_ERROR, "DetectTpmDevice: S3 mode\n"));
+    return SetupTpmDevice;
+  }
+
+  if (PcdGetBool (PcdHideTpmSupport) && PcdGetBool (PcdHideTpm)) {
+    DEBUG ((EFI_D_ERROR, "DetectTpmDevice: Tpm is hide\n"));
+    return TPM_DEVICE_NULL;
+  }
+
+  DEBUG ((EFI_D_ERROR, "DetectTpmDevice:\n"));
+  if ((!IsDtpmPresent ()) || (SetupTpmDevice == TPM_DEVICE_NULL)) {
+    // dTPM not available
+    return TPM_DEVICE_NULL;
+  }
+
+  // dTPM available and not disabled by setup
+  // We need check if it is TPM1.2 or TPM2.0
+  // So try TPM1.2 command at first
+
+  Status = Tpm12RequestUseTpm ();
+  if (EFI_ERROR (Status)) {
+    return TPM_DEVICE_2_0_DTPM;
+  }
+
+  Status = Tpm12Startup (TPM_ST_CLEAR);
+  if (EFI_ERROR (Status)) {
+    return TPM_DEVICE_2_0_DTPM;
+  }
+
+  // NO initialization needed again.
+  PcdSet8 (PcdTpmInitializationPolicy, 0);
+  return TPM_DEVICE_1_2;
+}