diff options
Diffstat (limited to 'Silicon/BroxtonSoC/BroxtonSiPkg/SouthCluster/Smbus/Dxe/PchSmbusEntry.c')
| -rw-r--r-- | Silicon/BroxtonSoC/BroxtonSiPkg/SouthCluster/Smbus/Dxe/PchSmbusEntry.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/Silicon/BroxtonSoC/BroxtonSiPkg/SouthCluster/Smbus/Dxe/PchSmbusEntry.c b/Silicon/BroxtonSoC/BroxtonSiPkg/SouthCluster/Smbus/Dxe/PchSmbusEntry.c new file mode 100644 index 0000000000..6ae16f3439 --- /dev/null +++ b/Silicon/BroxtonSoC/BroxtonSiPkg/SouthCluster/Smbus/Dxe/PchSmbusEntry.c @@ -0,0 +1,155 @@ +/** @file
+ PCH SMBus Driver.
+
+ Copyright (c) 2018, 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 "PchSmbus.h"
+#include <Library/ConfigBlockLib.h>
+
+extern EFI_GUID gEfiSmbusArpMapGuid;
+
+/**
+ 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 Others Something error occurred
+**/
+EFI_STATUS
+EFIAPI
+SmbusExecute (
+ IN CONST 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 ((DEBUG_INFO, "SmbusExecute() Start, SmbusDeviceAddress=%x, Command=%x, Operation=%x\n", (SlaveAddress.SmbusDeviceAddress << 1), Command, Operation));
+ InitializeSmbusRegisters ();
+
+ return SmbusExec (
+ SlaveAddress,
+ Command,
+ Operation,
+ PecCheck,
+ Length,
+ Buffer
+ );
+}
+
+/**
+ <b>SMBus DXE Module Entry Point</b>\n
+ - <b>Introduction</b>\n
+ The SMBus module is a DXE driver that provides a standard way to execute an SMBus command.
+
+ - @pre
+ - @link SC_POLICY SC_POLICY_HOB @endlink
+ - This module uses the parameters in SmbusConfig for platform reserved (non ARP capable) addresses.
+
+ - @result
+ The SMBus driver produces EFI_SMBUS_HC_PROTOCOL which is documented in the SMBus Host Controller
+ Protocol Specification.
+
+ @param[in] ImageHandle ImageHandle of this module
+ @param[in] SystemTable EFI System Table
+
+ @retval EFI_SUCCESS Driver initializes successfully
+ @retval Others Some error occurred
+**/
+EFI_STATUS
+EFIAPI
+InitializeScSmbus (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ SC_POLICY_HOB *ScPolicy;
+ EFI_STATUS Status;
+ UINTN DataSize;
+ VOID *Data;
+ EFI_PEI_HOB_POINTERS HobList;
+ SC_SMBUS_CONFIG *SmbusConfig;
+
+ DEBUG ((DEBUG_INFO, "InitializeScSmbus() Start\n"));
+
+ HobList.Guid = GetFirstGuidHob (&gScPolicyHobGuid);
+ ASSERT (HobList.Guid != NULL);
+ ScPolicy = GET_GUID_HOB_DATA (HobList.Guid);
+ Status = GetConfigBlock ((VOID *) ScPolicy, &gSmbusConfigGuid, (VOID *) &SmbusConfig);
+ 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 = SmbusConfig->NumRsvdSmbusAddresses;
+ mSmbusContext->PlatformRsvdAddr = SmbusConfig->RsvdSmbusAddressTable;
+ ASSERT (mSmbusContext->PlatformNumRsvd <= SC_MAX_SMBUS_RESERVED_ADDRESS);
+
+ //
+ // 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 (&gEfiSmbusArpMapGuid, 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,
+ &gEfiSmbusHcProtocolGuid,
+ &mSmbusContext->SmbusController,
+ NULL
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ DEBUG ((DEBUG_INFO, "InitializeScSmbus() End\n"));
+
+ return EFI_SUCCESS;
+}
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