mirror of https://github.com/acidanthera/audk.git
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
|
|
||
|
|
/** @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.
|
||
|
|
|
||
|
|
**/
|
||
|
|
EFI_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
|