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The Raspberry Pi 3 derives its 16550 baud clock from the variable core clock, and so any reprogramming of the baud rate needs to take the actual core clock value into account. Introduce a DXE phase version of DualSerialPortLib that discovers this value in its constructor, using the RPi firmware protocol, and wire it up for the RPi3 platform. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@arm.com> Reviewed-by: Pete Batard <pete@akeo.ie> Tested-by: Pete Batard <pete@akeo.ie>
68 lines
2.4 KiB
INI
68 lines
2.4 KiB
INI
## @file
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#
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# DXE phase SerialPortLib instance for both PL011 and 16550 UART.
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#
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# Copyright (c) 2020, Pete Batard <pete@akeo.ie>
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# Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
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#
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# SPDX-License-Identifier: BSD-2-Clause-Patent
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#
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##
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[Defines]
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INF_VERSION = 1.27
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BASE_NAME = DualSerialPortDxeLib
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FILE_GUID = d586667e-ec50-4bf6-9701-fb4e29055a60
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MODULE_TYPE = DXE_DRIVER
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VERSION_STRING = 1.0
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LIBRARY_CLASS = SerialPortLib|DXE_DRIVER
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CONSTRUCTOR = DualSerialPortDxeLibConstructor
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[Packages]
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ArmPlatformPkg/ArmPlatformPkg.dec
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MdeModulePkg/MdeModulePkg.dec
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MdePkg/MdePkg.dec
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Platform/RaspberryPi/RaspberryPi.dec
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Silicon/Broadcom/Bcm283x/Bcm283x.dec
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[LibraryClasses]
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IoLib
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PcdLib
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PL011UartClockLib
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PL011UartLib
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[Sources]
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DualSerialPortLib.c
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DualSerialPortLib.h
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DualSerialPortLibCommon.c
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DualSerialPortLibConstructor.c
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[Pcd]
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gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterAccessWidth ## SOMETIMES_CONSUMES
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gEfiMdeModulePkgTokenSpaceGuid.PcdSerialUseMmio ## CONSUMES
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gEfiMdeModulePkgTokenSpaceGuid.PcdSerialUseHardwareFlowControl ## CONSUMES
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gEfiMdeModulePkgTokenSpaceGuid.PcdSerialDetectCable ## SOMETIMES_CONSUMES
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gEfiMdeModulePkgTokenSpaceGuid.PcdSerialBaudRate ## CONSUMES
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gEfiMdeModulePkgTokenSpaceGuid.PcdSerialLineControl ## CONSUMES
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gEfiMdeModulePkgTokenSpaceGuid.PcdSerialFifoControl ## CONSUMES
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gEfiMdeModulePkgTokenSpaceGuid.PcdSerialPciDeviceInfo ## CONSUMES
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gEfiMdeModulePkgTokenSpaceGuid.PcdSerialExtendedTxFifoSize ## CONSUMES
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gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterStride ## CONSUMES
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[FixedPcd]
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gArmPlatformTokenSpaceGuid.PL011UartClkInHz
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gBcm283xTokenSpaceGuid.PcdBcm283xRegistersAddress
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gEfiMdePkgTokenSpaceGuid.PcdUartDefaultBaudRate
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gEfiMdePkgTokenSpaceGuid.PcdUartDefaultDataBits
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gEfiMdePkgTokenSpaceGuid.PcdUartDefaultParity
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gEfiMdePkgTokenSpaceGuid.PcdUartDefaultStopBits
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[Protocols]
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gRaspberryPiFirmwareProtocolGuid ## CONSUMES
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[PatchPcd]
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gEfiMdeModulePkgTokenSpaceGuid.PcdSerialClockRate ## CONSUMES
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[Depex]
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gRaspberryPiFirmwareProtocolGuid
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