mirror of https://github.com/acidanthera/audk.git
111 lines
3.2 KiB
C
111 lines
3.2 KiB
C
/** @file
|
|
Serial Port Lib that thunks back to Emulator services to write to StdErr.
|
|
All read functions are stubed out.
|
|
|
|
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
|
|
Portions copyright (c) 2011, Apple Inc. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#include <PiDxe.h>
|
|
#include <Library/SerialPortLib.h>
|
|
#include <Library/EmuThunkLib.h>
|
|
|
|
/**
|
|
Initialize the serial device hardware.
|
|
|
|
If no initialization is required, then return RETURN_SUCCESS.
|
|
If the serial device was successfully initialized, then return RETURN_SUCCESS.
|
|
If the serial device could not be initialized, then return RETURN_DEVICE_ERROR.
|
|
|
|
@retval RETURN_SUCCESS The serial device was initialized.
|
|
@retval RETURN_DEVICE_ERROR The serial device could not be initialized.
|
|
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
SerialPortInitialize (
|
|
VOID
|
|
)
|
|
{
|
|
return RETURN_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
Write data from buffer to serial device.
|
|
|
|
Writes NumberOfBytes data bytes from Buffer to the serial device.
|
|
The number of bytes actually written to the serial device is returned.
|
|
If the return value is less than NumberOfBytes, then the write operation failed.
|
|
If Buffer is NULL, then ASSERT().
|
|
If NumberOfBytes is zero, then return 0.
|
|
|
|
@param Buffer The pointer to the data buffer to be written.
|
|
@param NumberOfBytes The number of bytes to written to the serial device.
|
|
|
|
@retval 0 NumberOfBytes is 0.
|
|
@retval >0 The number of bytes written to the serial device.
|
|
If this value is less than NumberOfBytes, then the read operation failed.
|
|
|
|
**/
|
|
UINTN
|
|
EFIAPI
|
|
SerialPortWrite (
|
|
IN UINT8 *Buffer,
|
|
IN UINTN NumberOfBytes
|
|
)
|
|
{
|
|
if (gEmuThunk == NULL) {
|
|
return NumberOfBytes;
|
|
}
|
|
|
|
return gEmuThunk->WriteStdErr (Buffer, NumberOfBytes);
|
|
}
|
|
|
|
/**
|
|
Read data from serial device and save the datas in buffer.
|
|
|
|
Reads NumberOfBytes data bytes from a serial device into the buffer
|
|
specified by Buffer. The number of bytes actually read is returned.
|
|
If the return value is less than NumberOfBytes, then the rest operation failed.
|
|
If Buffer is NULL, then ASSERT().
|
|
If NumberOfBytes is zero, then return 0.
|
|
|
|
@param Buffer The pointer to the data buffer to store the data read from the serial device.
|
|
@param NumberOfBytes The number of bytes which will be read.
|
|
|
|
@retval 0 Read data failed; No data is to be read.
|
|
@retval >0 The actual number of bytes read from serial device.
|
|
|
|
**/
|
|
UINTN
|
|
EFIAPI
|
|
SerialPortRead (
|
|
OUT UINT8 *Buffer,
|
|
IN UINTN NumberOfBytes
|
|
)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
Polls a serial device to see if there is any data waiting to be read.
|
|
|
|
Polls a serial device to see if there is any data waiting to be read.
|
|
If there is data waiting to be read from the serial device, then TRUE is returned.
|
|
If there is no data waiting to be read from the serial device, then FALSE is returned.
|
|
|
|
@retval TRUE Data is waiting to be read from the serial device.
|
|
@retval FALSE There is no data waiting to be read from the serial device.
|
|
|
|
**/
|
|
BOOLEAN
|
|
EFIAPI
|
|
SerialPortPoll (
|
|
VOID
|
|
)
|
|
{
|
|
return FALSE;
|
|
}
|