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MdePkg/BaseSerialPortLib16550: Support UARTs with a register stride greater than 1 byte. 

Add stride PCD to MdeModulePkg to support 16550 UARTs with a register stride that is not 1 byte.
The default value is 1 byte.
Quark SoC uses a stride of 4 bytes.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17215 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Michael Kinney 2015-04-27 19:44:40 +00:00 committed by mdkinney
parent cfe41b57ab
commit cd68e4a8de
4 changed files with 16 additions and 11 deletions
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10
MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.c
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@ -2,7 +2,7 @@
16550 UART Serial Port library functions
(C) Copyright 2014 Hewlett-Packard Development Company, L.P.<BR>
Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 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
@ -77,9 +77,9 @@ SerialPortReadRegister (
)
{
if (PcdGetBool (PcdSerialUseMmio)) {
return MmioRead8 (Base + Offset);
return MmioRead8 (Base + Offset * PcdGet32 (PcdSerialRegisterStride));
} else {
return IoRead8 (Base + Offset);
return IoRead8 (Base + Offset * PcdGet32 (PcdSerialRegisterStride));
}
}
@ -104,9 +104,9 @@ SerialPortWriteRegister (
)
{
if (PcdGetBool (PcdSerialUseMmio)) {
return MmioWrite8 (Base + Offset, Value);
return MmioWrite8 (Base + Offset * PcdGet32 (PcdSerialRegisterStride), Value);
} else {
return IoWrite8 (Base + Offset, Value);
return IoWrite8 (Base + Offset * PcdGet32 (PcdSerialRegisterStride), Value);
}
}

5
MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.inf
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@ -1,7 +1,7 @@
## @file
# SerialPortLib instance for 16550 UART.
#
# Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2006 - 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
@ -18,7 +18,7 @@
MODULE_UNI_FILE = BaseSerialPortLib16550.uni
FILE_GUID = 9E7C00CF-355A-4d4e-BF60-0428CFF95540
MODULE_TYPE = BASE
VERSION_STRING = 1.0
VERSION_STRING = 1.1
LIBRARY_CLASS = SerialPortLib
[Packages]
@ -45,3 +45,4 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialClockRate ## CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialPciDeviceInfo ## CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialExtendedTxFifoSize ## CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterStride ## CONSUMES

6
MdeModulePkg/MdeModulePkg.dec
View File

@ -20,7 +20,7 @@
PACKAGE_NAME = MdeModulePkg
PACKAGE_UNI_FILE = MdeModulePkg.uni
PACKAGE_GUID = BA0D78D6-2CAF-414b-BD4D-B6762A894288
PACKAGE_VERSION = 0.94
PACKAGE_VERSION = 0.96
[Includes]
Include
@ -916,6 +916,10 @@
# @Prompt Serial Port Extended Transmit FIFO Size in Bytes
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialExtendedTxFifoSize|64|UINT32|0x00010068
## The number of bytes between registers in serial device. The default is 1 byte.
# @Prompt Serial Port Register Stride in Bytes
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterStride|1|UINT32|0x0001006B
[PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx]
## This PCD defines the Console output row. The default value is 25 according to UEFI spec.
# This PCD could be set to 0 then console output would be at max column and max row.

BIN
MdeModulePkg/MdeModulePkg.uni
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