/** @file
|
Initializes Serial IO Controllers.
|
|
Copyright (c) 2019 Intel Corporation. All rights reserved. <BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
**/
|
|
#include <Library/DebugLib.h>
|
#include <Library/IoLib.h>
|
#include "PchInit.h"
|
#include <Library/PchSerialIoLib.h>
|
#include <IndustryStandard/Pci30.h>
|
#include <Register/PchRegsSerialIo.h>
|
|
/**
|
Puts all SerialIo controllers (except UARTs in debug mode) in D3
|
Clears MemoryEnable for all PCI-mode controllers
|
**/
|
EFI_STATUS
|
ConfigureSerialIoAtBoot (
|
VOID
|
)
|
{
|
PCH_SERIAL_IO_CONTROLLER Index;
|
UINTN PciCfgBase;
|
|
for (Index = 0; Index < PchSerialIoIndexMax; Index++) {
|
if (mPchConfigHob->SerialIo.DevMode[Index] == PchSerialIoDisabled) {
|
if (IsSerialIoFunctionZero (Index)) {
|
if (IsSerialIoDeviceEnabled (GetSerialIoDeviceNumber (Index), GetSerialIoFunctionNumber (Index))) {
|
PciCfgBase = FindSerialIoBar (Index,1);
|
MmioOr32 (PciCfgBase + R_SERIAL_IO_CFG_PME_CTRL_STS, B_SERIAL_IO_CFG_PME_CTRL_STS_PWR_ST);
|
}
|
}
|
continue;
|
}
|
if ((Index >= PchSerialIoIndexUart0) &&
|
(mPchConfigHob->SerialIo.EnableDebugUartAfterPost) &&
|
(mPchConfigHob->SerialIo.DebugUartNumber == (UINT32) (Index - PchSerialIoIndexUart0))) {
|
continue;
|
}
|
PciCfgBase = FindSerialIoBar (Index,1);
|
MmioOr32 (PciCfgBase + R_SERIAL_IO_CFG_PME_CTRL_STS, B_SERIAL_IO_CFG_PME_CTRL_STS_PWR_ST);
|
MmioRead32 (PciCfgBase + R_SERIAL_IO_CFG_PME_CTRL_STS);
|
if (mPchConfigHob->SerialIo.DevMode[Index] == PchSerialIoPci) {
|
MmioAnd32 (PciCfgBase + PCI_COMMAND_OFFSET, (UINT32)~(EFI_PCI_COMMAND_MEMORY_SPACE | EFI_PCI_COMMAND_BUS_MASTER) );
|
if (mPchConfigHob->SerialIo.DebugUartNumber == (UINT32) (Index - PchSerialIoIndexUart0)) {
|
continue;
|
}
|
MmioWrite32 (PciCfgBase + R_SERIAL_IO_CFG_BAR0_LOW, 0);
|
MmioWrite32 (PciCfgBase + R_SERIAL_IO_CFG_BAR0_HIGH, 0);
|
}
|
}
|
return EFI_SUCCESS;
|
}
|
|