24ca2f3507
Pass the serial port baudrate, register stride, input clock rate and ID from coreboot to CorebootPayloadPkg. Change-Id: I37111d23216e4effa2909337af7e8a6de36b61f7 Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com> Reviewed-by: Prince Agyeman <prince.agyeman@intel.com>
112 lines
3.8 KiB
C
112 lines
3.8 KiB
C
/** @file
|
|
Platform Hook Library instance for UART device upon coreboot.
|
|
|
|
Copyright (c) 2015, 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 <Base.h>
|
|
#include <Uefi/UefiBaseType.h>
|
|
#include <Library/PciLib.h>
|
|
#include <Library/PlatformHookLib.h>
|
|
#include <Library/CbParseLib.h>
|
|
#include <Library/PcdLib.h>
|
|
|
|
typedef struct {
|
|
UINT16 VendorId; ///< Vendor ID to match the PCI device. The value 0xFFFF terminates the list of entries.
|
|
UINT16 DeviceId; ///< Device ID to match the PCI device
|
|
UINT32 ClockRate; ///< UART clock rate. Set to 0 for default clock rate of 1843200 Hz
|
|
UINT64 Offset; ///< The byte offset into to the BAR
|
|
UINT8 BarIndex; ///< Which BAR to get the UART base address
|
|
UINT8 RegisterStride; ///< UART register stride in bytes. Set to 0 for default register stride of 1 byte.
|
|
UINT16 ReceiveFifoDepth; ///< UART receive FIFO depth in bytes. Set to 0 for a default FIFO depth of 16 bytes.
|
|
UINT16 TransmitFifoDepth; ///< UART transmit FIFO depth in bytes. Set to 0 for a default FIFO depth of 16 bytes.
|
|
UINT8 Reserved[2];
|
|
} PCI_SERIAL_PARAMETER;
|
|
|
|
/**
|
|
Performs platform specific initialization required for the CPU to access
|
|
the hardware associated with a SerialPortLib instance. This function does
|
|
not intiailzie the serial port hardware itself. Instead, it initializes
|
|
hardware devices that are required for the CPU to access the serial port
|
|
hardware. This function may be called more than once.
|
|
|
|
@retval RETURN_SUCCESS The platform specific initialization succeeded.
|
|
@retval RETURN_DEVICE_ERROR The platform specific initialization could not be completed.
|
|
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
PlatformHookSerialPortInitialize (
|
|
VOID
|
|
)
|
|
{
|
|
RETURN_STATUS Status;
|
|
UINT32 SerialRegBase;
|
|
UINT32 SerialRegAccessType;
|
|
UINT32 BaudRate;
|
|
UINT32 RegWidth;
|
|
UINT32 InputHertz;
|
|
UINT32 PayloadParam;
|
|
UINT32 DeviceVendor;
|
|
PCI_SERIAL_PARAMETER *SerialParam;
|
|
|
|
Status = CbParseSerialInfo (&SerialRegBase, &SerialRegAccessType,
|
|
&RegWidth, &BaudRate, &InputHertz,
|
|
&PayloadParam);
|
|
if (RETURN_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
if (SerialRegAccessType == 2) { //MMIO
|
|
Status = PcdSetBoolS (PcdSerialUseMmio, TRUE);
|
|
} else { //IO
|
|
Status = PcdSetBoolS (PcdSerialUseMmio, FALSE);
|
|
}
|
|
if (RETURN_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
Status = PcdSet64S (PcdSerialRegisterBase, (UINT64) SerialRegBase);
|
|
if (RETURN_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = PcdSet32S (PcdSerialRegisterStride, RegWidth);
|
|
if (RETURN_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = PcdSet32S (PcdSerialBaudRate, BaudRate);
|
|
if (RETURN_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = PcdSet64S (PcdUartDefaultBaudRate, BaudRate);
|
|
if (RETURN_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = PcdSet32S (PcdSerialClockRate, InputHertz);
|
|
if (RETURN_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
if (PayloadParam >= 0x80000000) {
|
|
DeviceVendor = PciRead32 (PayloadParam & 0x0ffff000);
|
|
SerialParam = PcdGetPtr(PcdPciSerialParameters);
|
|
SerialParam->VendorId = (UINT16)DeviceVendor;
|
|
SerialParam->DeviceId = DeviceVendor >> 16;
|
|
SerialParam->ClockRate = InputHertz;
|
|
SerialParam->RegisterStride = (UINT8)RegWidth;
|
|
}
|
|
|
|
return RETURN_SUCCESS;
|
|
}
|