mirror of
https://github.com/acidanthera/audk.git
synced 2025-11-03 21:17:23 +01:00
5f4f1334e3
It was previously returning '0' written bytes that was interprating by the higher layers as a failing operation. Fix proposed by Eugene Cohen (HP) git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12026 6f19259b-4bc3-4df7-8a09-765794883524
145 lines
3.3 KiB
C
145 lines
3.3 KiB
C
/** @file
|
|
Serial I/O Port library functions with no library constructor/destructor
|
|
|
|
Copyright (c) 2008 - 2009, Apple Inc. 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 <Uefi.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/SemihostLib.h>
|
|
#include <Library/SerialPortLib.h>
|
|
|
|
|
|
/*
|
|
|
|
Programmed hardware of Serial port.
|
|
|
|
@return Always return EFI_UNSUPPORTED.
|
|
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
SerialPortInitialize (
|
|
VOID
|
|
)
|
|
{
|
|
if (SemihostConnectionSupported ()) {
|
|
return RETURN_SUCCESS;
|
|
} else {
|
|
return RETURN_UNSUPPORTED;
|
|
}
|
|
}
|
|
|
|
/**
|
|
Write data to serial device.
|
|
|
|
@param Buffer Point of data buffer which need to be writed.
|
|
@param NumberOfBytes Number of output bytes which are cached in Buffer.
|
|
|
|
@retval 0 Write data failed.
|
|
@retval !0 Actual number of bytes writed to serial device.
|
|
|
|
**/
|
|
|
|
#define PRINT_BUFFER_SIZE 512
|
|
#define PRINT_BUFFER_THRESHOLD (PRINT_BUFFER_SIZE - 4)
|
|
|
|
UINTN
|
|
EFIAPI
|
|
SerialPortWrite (
|
|
IN UINT8 *Buffer,
|
|
IN UINTN NumberOfBytes
|
|
)
|
|
{
|
|
UINT8 PrintBuffer[PRINT_BUFFER_SIZE];
|
|
UINTN SourceIndex = 0;
|
|
UINTN DestinationIndex = 0;
|
|
UINT8 CurrentCharacter;
|
|
|
|
while (SourceIndex < NumberOfBytes)
|
|
{
|
|
CurrentCharacter = Buffer[SourceIndex++];
|
|
|
|
switch (CurrentCharacter)
|
|
{
|
|
case '\r':
|
|
continue;
|
|
|
|
case '\n':
|
|
PrintBuffer[DestinationIndex++] = ' ';
|
|
// fall through
|
|
|
|
default:
|
|
PrintBuffer[DestinationIndex++] = CurrentCharacter;
|
|
break;
|
|
}
|
|
|
|
if (DestinationIndex > PRINT_BUFFER_THRESHOLD)
|
|
{
|
|
PrintBuffer[DestinationIndex] = '\0';
|
|
SemihostWriteString ((CHAR8 *) PrintBuffer);
|
|
|
|
DestinationIndex = 0;
|
|
}
|
|
}
|
|
|
|
if (DestinationIndex > 0)
|
|
{
|
|
PrintBuffer[DestinationIndex] = '\0';
|
|
SemihostWriteString ((CHAR8 *) PrintBuffer);
|
|
}
|
|
|
|
return NumberOfBytes;
|
|
}
|
|
|
|
|
|
/**
|
|
Read data from serial device and save the datas in buffer.
|
|
|
|
@param Buffer Point of data buffer which need to be writed.
|
|
@param NumberOfBytes Number of output bytes which are cached in Buffer.
|
|
|
|
@retval 0 Read data failed.
|
|
@retval !0 Aactual number of bytes read from serial device.
|
|
|
|
**/
|
|
UINTN
|
|
EFIAPI
|
|
SerialPortRead (
|
|
OUT UINT8 *Buffer,
|
|
IN UINTN NumberOfBytes
|
|
)
|
|
{
|
|
*Buffer = SemihostReadCharacter ();
|
|
return 1;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
Check to see if any data is avaiable to be read from the debug device.
|
|
|
|
@retval TRUE At least one byte of data is avaiable to be read
|
|
@retval FALSE No data is avaiable to be read
|
|
|
|
**/
|
|
BOOLEAN
|
|
EFIAPI
|
|
SerialPortPoll (
|
|
VOID
|
|
)
|
|
{
|
|
// Since SemiHosting read character is blocking always say we have a char ready?
|
|
return SemihostConnectionSupported ();
|
|
}
|
|
|