Add TPM2 implementation.

[mirror_edk2.git] / SecurityPkg / Tcg / TrEEConfig / TpmDetection.c

diff --git a/SecurityPkg/Tcg/TrEEConfig/TpmDetection.c b/SecurityPkg/Tcg/TrEEConfig/TpmDetection.c
new file mode 100644 (file)
index 0000000..b8aab1f
--- /dev/null
+++ b/SecurityPkg/Tcg/TrEEConfig/TpmDetection.c
@@ -0,0 +1,107 @@
+/** @file\r
+  TPM1.2/dTPM2.0 auto detection.\r
+\r
+Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>\r
+This program and the accompanying materials \r
+are licensed and made available under the terms and conditions of the BSD License \r
+which accompanies this distribution.  The full text of the license may be found at \r
+http://opensource.org/licenses/bsd-license.php\r
+\r
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+\r
+#include <PiPei.h>\r
+\r
+#include <Library/BaseLib.h>\r
+#include <Library/BaseMemoryLib.h>\r
+#include <Library/IoLib.h>\r
+#include <Library/DebugLib.h>\r
+#include <Library/PeiServicesLib.h>\r
+#include <Library/PcdLib.h>\r
+#include <Library/Tpm12DeviceLib.h>\r
+#include <Library/Tpm12CommandLib.h>\r
+#include <IndustryStandard/Tpm12.h>\r
+\r
+#include "TrEEConfigNvData.h"\r
+\r
+/**\r
+  This routine return if dTPM (1.2 or 2.0) present.\r
+\r
+  @retval TRUE  dTPM present\r
+  @retval FALSE dTPM not present\r
+**/\r
+BOOLEAN\r
+IsDtpmPresent (\r
+  VOID\r
+  )\r
+{\r
+  UINT8                             RegRead;\r
+  \r
+  RegRead = MmioRead8 ((UINTN)PcdGet64 (PcdTpmBaseAddress));\r
+  if (RegRead == 0xFF) {\r
+    DEBUG ((EFI_D_ERROR, "DetectTpmDevice: Dtpm not present\n"));\r
+    return FALSE;\r
+  } else {\r
+    DEBUG ((EFI_D_ERROR, "DetectTpmDevice: Dtpm present\n"));\r
+    return TRUE;\r
+  }\r
+}\r
+\r
+/**\r
+  This routine check both SetupVariable and real TPM device, and return final TpmDevice configuration.\r
+\r
+  @param  SetupTpmDevice  TpmDevice configuration in setup driver\r
+\r
+  @return TpmDevice configuration\r
+**/\r
+UINT8\r
+DetectTpmDevice (\r
+  IN UINT8 SetupTpmDevice\r
+  )\r
+{\r
+  EFI_STATUS                        Status;\r
+  EFI_BOOT_MODE                     BootMode;\r
+\r
+  Status = PeiServicesGetBootMode (&BootMode);\r
+  ASSERT_EFI_ERROR (Status);\r
+\r
+  //\r
+  // In S3, we rely on Setup option, because we save to Setup in normal boot.\r
+  //\r
+  if (BootMode == BOOT_ON_S3_RESUME) {\r
+    DEBUG ((EFI_D_ERROR, "DetectTpmDevice: S3 mode\n"));\r
+    return SetupTpmDevice;\r
+  }\r
+\r
+  if (PcdGetBool (PcdHideTpmSupport) && PcdGetBool (PcdHideTpm)) {\r
+    DEBUG ((EFI_D_ERROR, "DetectTpmDevice: Tpm is hide\n"));\r
+    return TPM_DEVICE_NULL;\r
+  }\r
+\r
+  DEBUG ((EFI_D_ERROR, "DetectTpmDevice:\n"));\r
+  if ((!IsDtpmPresent ()) || (SetupTpmDevice == TPM_DEVICE_NULL)) {\r
+    // dTPM not available\r
+    return TPM_DEVICE_NULL;\r
+  }\r
+\r
+  // dTPM available and not disabled by setup\r
+  // We need check if it is TPM1.2 or TPM2.0\r
+  // So try TPM1.2 command at first\r
+\r
+  Status = Tpm12RequestUseTpm ();\r
+  if (EFI_ERROR (Status)) {\r
+    return TPM_DEVICE_2_0_DTPM;\r
+  }\r
+\r
+  Status = Tpm12Startup (TPM_ST_CLEAR);\r
+  if (EFI_ERROR (Status)) {\r
+    return TPM_DEVICE_2_0_DTPM;\r
+  }\r
+\r
+  // NO initialization needed again.\r
+  PcdSet8 (PcdTpmInitializationPolicy, 0);\r
+  return TPM_DEVICE_1_2;\r
+}\r