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/** @file
Serial I/O Port library functions with no library constructor/destructor
Copyright (c) 2006, Intel Corporation
All rights reserved. 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.
Module Name: SerialPortLib.h
**/
#ifndef __SERIAL_PORT_LIB__
#define __SERIAL_PORT_LIB__
/**
Programmed hardware of Serial port.
@return Status of Serial Port Device initialization.
**/
RETURN_STATUS
EFIAPI
SerialPortInitialize (
VOID
);
/**
Write data to serial device.
If the buffer is NULL, then return 0;
if NumberOfBytes is zero, then return 0.
@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.
**/
UINTN
EFIAPI
SerialPortWrite (
IN UINT8 *Buffer,
IN UINTN NumberOfBytes
);
/**
Read data from serial device and save the datas in buffer.
If the buffer is NULL, then return zero;
if NumberOfBytes is zero, then return zero.
@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
);
#endif
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