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/** @file
PCH Smbus Driver Entry
@copyright
Copyright (c) 2009 - 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"
//
// Global variables
//
EFI_SMM_BASE_PROTOCOL *mSmmBase;
EFI_SMM_SYSTEM_TABLE *mSmst;
EFI_GUID mEfiSmmSmbusProtocolGuid = EFI_SMM_SMBUS_PROTOCOL_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
)
{
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
InitializePchSmbusSmm (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
///
/// Locate SMM Base Protocol
///
Status = gBS->LocateProtocol (&gEfiSmmBaseProtocolGuid, NULL, (VOID **) &mSmmBase);
ASSERT_EFI_ERROR (Status);
///
/// Initialize our module variables
///
Status = mSmmBase->GetSmstLocation (mSmmBase, &mSmst);
ASSERT_EFI_ERROR (Status);
Status = mSmst->SmmAllocatePool (EfiRuntimeServicesData, sizeof (SMBUS_INSTANCE), (VOID **) &mSmbusContext);
if (EFI_ERROR (Status)) {
return Status;
} else {
ZeroMem (mSmbusContext, sizeof (SMBUS_INSTANCE));
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;
///
/// Install the SMBUS interface
///
Status = gBS->InstallMultipleProtocolInterfaces (
&mSmbusContext->Handle,
&mEfiSmmSmbusProtocolGuid,
&mSmbusContext->SmbusController,
NULL
);
ASSERT_EFI_ERROR (Status);
}
return EFI_SUCCESS;
}
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