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/** @file
Implements Overclocking Interface for OS Application ie Iron city.
Copyright (c) 2015 - 2016, 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 <UsbTypeC.h>
#include <Protocol/AcpiTable.h>
#include <Library/DebugLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Protocol/GlobalNvsArea.h>
GLOBAL_REMOVE_IF_UNREFERENCED EFI_GLOBAL_NVS_AREA_PROTOCOL *GlobalNvsAreaProtocol;
GLOBAL_REMOVE_IF_UNREFERENCED EFI_GLOBAL_NVS_AREA *mGlobalNvsAreaPtr;
#define USBTYPEC_DATA_VAR L"UsbTypeC"
EFI_GUID UsbTypeCVarGuid = { 0xfc876842, 0xd8f0, 0x4844, {0xae, 0x32, 0x1f, 0xf8, 0x43, 0x79, 0x7b, 0x17} };
/**
Allocate MemoryType below 4G memory address.
@param[in] Size Size of memory to allocate.
@param[in] Buffer Allocated address for output.
@retval EFI_SUCCESS Memory successfully allocated.
@retval Other Other errors occur.
**/
static EFI_STATUS
AllocateMemoryBelow4G (
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN Size,
OUT VOID **Buffer
)
{
UINTN Pages;
EFI_PHYSICAL_ADDRESS Address;
EFI_STATUS Status;
Pages = EFI_SIZE_TO_PAGES (Size);
Address = 0xffffffff;
Status = gBS->AllocatePages (
AllocateMaxAddress,
MemoryType,
Pages,
&Address
);
*Buffer = (VOID *) (UINTN) Address;
return Status;
};
static UINT16 GetUcsiRev(VOID)
{
return 0;
}
/**
This function is the entry point for this DXE driver.
@param[in] ImageHandle Image handle of this driver.
@param[in] SystemTable Global system service table.
@retval EFI_DEVICE_ERROR Initialization fails
@retval EFI_SUCCESS Initialization completes successfully.
**/
EFI_STATUS
UsbTypeCEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
USBTYPEC_OPM_BUF *OpmBuffer;
DEBUG ((DEBUG_INFO, "UsbTypeC entrypoint.\n"));
Status = gBS->LocateProtocol (&gEfiGlobalNvsAreaProtocolGuid, NULL, &GlobalNvsAreaProtocol);
ASSERT_EFI_ERROR (Status);
if (EFI_ERROR (Status)) {
return Status;
}
mGlobalNvsAreaPtr = GlobalNvsAreaProtocol->Area;
//
// Allocate memory in ACPI NVS
//
Status = AllocateMemoryBelow4G (EfiACPIMemoryNVS, 0x1000, &OpmBuffer);
ASSERT_EFI_ERROR (Status);
if (EFI_ERROR (Status)) {
return Status;
}
SetMem (OpmBuffer, sizeof (USBTYPEC_OPM_BUF), 0x0);
OpmBuffer->Version = GetUcsiRev();
mGlobalNvsAreaPtr->UsbTypeCOpBaseAddr = (UINT32) (UINTN) OpmBuffer;
DEBUG ((DEBUG_INFO, "UsbTypeC EntryPoint: mGlobalNvsAreaPtr->UsbTypeCOpBaseAddr = 0x%X\n", mGlobalNvsAreaPtr->UsbTypeCOpBaseAddr));
Status = gRT->SetVariable (
USBTYPEC_DATA_VAR,
&UsbTypeCVarGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
sizeof (UINT32),
&(mGlobalNvsAreaPtr->UsbTypeCOpBaseAddr)
);
return Status;
}
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