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Diffstat (limited to 'ReferenceCode/Chipset/LynxPoint/Smbus/Dxe/PchSmbusEntry.c')
| -rw-r--r-- | ReferenceCode/Chipset/LynxPoint/Smbus/Dxe/PchSmbusEntry.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/ReferenceCode/Chipset/LynxPoint/Smbus/Dxe/PchSmbusEntry.c b/ReferenceCode/Chipset/LynxPoint/Smbus/Dxe/PchSmbusEntry.c new file mode 100644 index 0000000..35cab3f --- /dev/null +++ b/ReferenceCode/Chipset/LynxPoint/Smbus/Dxe/PchSmbusEntry.c @@ -0,0 +1,149 @@ +/** @file + PCH Smbus Driver + +@copyright + Copyright (c) 2004 - 2012 Intel Corporation. All rights reserved + This software and associated documentation (if any) is furnished + under a license and may only be used or copied in accordance + with the terms of the license. Except as permitted by such + license, no part of this software or documentation may be + reproduced, stored in a retrieval system, or transmitted in any + form or by any means without the express written consent of + Intel Corporation. + + This file contains an 'Intel Peripheral Driver' and uniquely + identified as "Intel Reference Module" and is + licensed for Intel CPUs and chipsets under the terms of your + license agreement with Intel or your vendor. This file may + be modified by the user, subject to additional terms of the + license agreement +**/ +#include "PchSmbus.h" + +EFI_GUID mEfiSmbusArpMapGuid = EFI_SMBUS_ARP_MAP_GUID; + +/** + Execute an SMBUS operation + + @param[in] This The protocol instance + @param[in] SlaveAddress The address of the SMBUS slave device + @param[in] Command The SMBUS command + @param[in] Operation Which SMBus protocol will be issued + @param[in] PecCheck If Packet Error Code Checking is to be used + @param[in, out] Length Length of data + @param[in, out] Buffer Data buffer + + @retval EFI_SUCCESS The SMBUS operation is successful + @retval Other Values Something error occurred +**/ +EFI_STATUS +EFIAPI +SmbusExecute ( + IN EFI_SMBUS_HC_PROTOCOL *This, + IN EFI_SMBUS_DEVICE_ADDRESS SlaveAddress, + IN EFI_SMBUS_DEVICE_COMMAND Command, + IN EFI_SMBUS_OPERATION Operation, + IN BOOLEAN PecCheck, + IN OUT UINTN *Length, + IN OUT VOID *Buffer + ) +{ + DEBUG ((EFI_D_INFO, "SmbusExecute() Start, SmbusDeviceAddress=%x, Command=%x, Operation=%x\n", (SlaveAddress.SmbusDeviceAddress << 1), Command, Operation)); + InitializeSmbusRegisters (); + + return SmbusExec ( + SlaveAddress, + Command, + Operation, + PecCheck, + Length, + Buffer + ); +} + +/** + Smbus driver entry point + + @param[in] ImageHandle ImageHandle of this module + @param[in] SystemTable EFI System Table + + @retval EFI_SUCCESS Driver initializes successfully + @retval Other values Some error occurred +**/ +EFI_STATUS +EFIAPI +InitializePchSmbus ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + DXE_PCH_PLATFORM_POLICY_PROTOCOL *PchPlatformPolicy; + EFI_STATUS Status; + UINTN DataSize; + VOID *Data; + EFI_PEI_HOB_POINTERS HobList; + + DEBUG ((EFI_D_INFO, "InitializePchSmbus() Start\n")); + + Status = gBS->LocateProtocol ( + &gDxePchPlatformPolicyProtocolGuid, + NULL, + (VOID **) &PchPlatformPolicy + ); + ASSERT_EFI_ERROR (Status); + + mSmbusContext = AllocateZeroPool (sizeof (SMBUS_INSTANCE)); + if (mSmbusContext == NULL) { + ASSERT (FALSE); + return EFI_OUT_OF_RESOURCES; + } + + mSmbusContext->Signature = PCH_SMBUS_PRIVATE_DATA_SIGNATURE; + mSmbusContext->IoDone = IoDone; + mSmbusContext->SmbusIoRead = SmbusIoRead; + mSmbusContext->SmbusIoWrite = SmbusIoWrite; + mSmbusContext->SmbusController.Execute = SmbusExecute; + mSmbusContext->SmbusController.ArpDevice = SmbusArpDevice; + mSmbusContext->SmbusController.GetArpMap = SmbusGetArpMap; + mSmbusContext->SmbusController.Notify = SmbusNotify; + mSmbusContext->PlatformNumRsvd = PchPlatformPolicy->SmbusConfig->NumRsvdSmbusAddresses; + mSmbusContext->PlatformRsvdAddr = PchPlatformPolicy->SmbusConfig->RsvdSmbusAddressTable; + + /// + /// See if PEI already ARPed any devices, and if so, update our device map. + /// + /// Get Hob list + /// + Status = EfiGetSystemConfigurationTable (&gEfiHobListGuid, (VOID **) &HobList.Raw); + ASSERT_EFI_ERROR (Status); + + HobList.Raw = GetNextGuidHob (&mEfiSmbusArpMapGuid, HobList.Raw); + /// + /// If we found the right hob, store the information. Otherwise, continue. + /// + if (HobList.Raw != NULL) { + Data = (VOID *) ((UINT8 *) (&HobList.Guid->Name) + sizeof (EFI_GUID)); + DataSize = HobList.Header->HobLength - sizeof (EFI_HOB_GUID_TYPE); + CopyMem (mSmbusContext->DeviceMap, Data, DataSize); + mSmbusContext->DeviceMapEntries = (UINT8) (DataSize / sizeof (EFI_SMBUS_DEVICE_MAP)); + } + /// + /// Initialize the NotifyFunctionList + /// + InitializeListHead (&mSmbusContext->NotifyFunctionList); + + /// + /// Install the SMBUS interface + /// + Status = gBS->InstallMultipleProtocolInterfaces ( + &mSmbusContext->Handle, + &gEfiSmbusProtocolGuid, + &mSmbusContext->SmbusController, + NULL + ); + ASSERT_EFI_ERROR (Status); + + DEBUG ((EFI_D_INFO, "InitializePchSmbus() End\n")); + + return EFI_SUCCESS; +} |