/** @file
|
*
|
* Copyright (c) 2015, Hisilicon Limited. All rights reserved.
|
* Copyright (c) 2015, Linaro Limited. All rights reserved.
|
*
|
* SPDX-License-Identifier: BSD-2-Clause-Patent
|
*
|
**/
|
|
|
#include <PiDxe.h>
|
#include <Library/DebugLib.h>
|
#include <Library/UefiBootServicesTableLib.h>
|
#include <Library/BaseLib.h>
|
#include <Library/UefiRuntimeLib.h>
|
#include <Library/DxeServicesTableLib.h>
|
#include <Guid/EventGroup.h>
|
|
#include <Library/PlatformSysCtrlLib.h>
|
#include "I2CLibInternal.h"
|
|
STATIC EFI_EVENT mI2cLibVirtualAddrChangeEvent;
|
|
STATIC UINTN gI2cBase[MAX_SOCKET][I2C_PORT_MAX];
|
|
UINTN GetI2cBase (UINT32 Socket, UINT8 Port)
|
{
|
if (gI2cBase[Socket][Port] == 0) {
|
gI2cBase[Socket][Port] = PlatformGetI2cBase(Socket, Port);
|
}
|
|
return gI2cBase[Socket][Port];
|
}
|
|
VOID
|
EFIAPI
|
I2cLibVirtualNotifyEvent (
|
IN EFI_EVENT Event,
|
IN VOID *Context
|
)
|
{
|
UINT32 Socket;
|
UINT8 Port;
|
|
// We assume that all I2C ports used in one runtime driver need to be
|
// converted into virtual address.
|
for (Socket = 0; Socket < MAX_SOCKET; Socket++) {
|
for (Port = 0; Port < I2C_PORT_MAX; Port++) {
|
if (gI2cBase[Socket][Port] != 0) {
|
EfiConvertPointer (0x0, (VOID **)&gI2cBase[Socket][Port]);
|
}
|
}
|
}
|
|
return;
|
}
|
|
EFI_STATUS
|
I2cLibRuntimeSetup (UINT32 Socket, UINT8 Port)
|
{
|
EFI_STATUS Status;
|
|
UINTN Base = GetI2cBase (Socket, Port);
|
|
// Declare the controller as EFI_MEMORY_RUNTIME
|
Status = gDS->AddMemorySpace (
|
EfiGcdMemoryTypeMemoryMappedIo,
|
Base, SIZE_64KB,
|
EFI_MEMORY_UC | EFI_MEMORY_RUNTIME
|
);
|
if (EFI_ERROR (Status)) {
|
DEBUG ((EFI_D_WARN, "[%a:%d] AddMemorySpace failed: %r\n", __FUNCTION__, __LINE__, Status));
|
}
|
|
Status = gDS->SetMemorySpaceAttributes (Base, SIZE_64KB, EFI_MEMORY_UC | EFI_MEMORY_RUNTIME);
|
if (EFI_ERROR (Status)) {
|
DEBUG ((EFI_D_ERROR, "[%a:%d] SetMemorySpaceAttributes failed: %r\n", __FUNCTION__, __LINE__, Status));
|
return Status;
|
}
|
|
//
|
// Register for the virtual address change event
|
//
|
// Only create event once
|
if (mI2cLibVirtualAddrChangeEvent == NULL) {
|
Status = gBS->CreateEventEx (
|
EVT_NOTIFY_SIGNAL,
|
TPL_NOTIFY,
|
I2cLibVirtualNotifyEvent,
|
NULL,
|
&gEfiEventVirtualAddressChangeGuid,
|
&mI2cLibVirtualAddrChangeEvent
|
);
|
if (EFI_ERROR (Status)) {
|
DEBUG ((EFI_D_ERROR, "[%a:%d] Create event failed: %r\n", __FUNCTION__, __LINE__, Status));
|
return Status;
|
}
|
}
|
|
return EFI_SUCCESS;
|
}
|
|
|