mirror of https://github.com/acidanthera/audk.git
125 lines
3.2 KiB
C
125 lines
3.2 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 <Base.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/SerialPortLib.h>
|
|
#include <Library/PcdLib.h>
|
|
#include <Library/IoLib.h>
|
|
#include <Library/OmapLib.h>
|
|
#include <Omap3530/Omap3530.h>
|
|
|
|
/*
|
|
|
|
Programmed hardware of Serial port.
|
|
|
|
@return Always return EFI_UNSUPPORTED.
|
|
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
SerialPortInitialize (
|
|
VOID
|
|
)
|
|
{
|
|
// assume assembly code at reset vector has setup UART
|
|
return RETURN_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
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.
|
|
|
|
**/
|
|
UINTN
|
|
EFIAPI
|
|
SerialPortWrite (
|
|
IN UINT8 *Buffer,
|
|
IN UINTN NumberOfBytes
|
|
)
|
|
{
|
|
UINT32 LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
|
|
UINT32 THR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_THR_REG;
|
|
UINTN Count;
|
|
|
|
for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {
|
|
while ((MmioRead8(LSR) & UART_LSR_TX_FIFO_E_MASK) == UART_LSR_TX_FIFO_E_NOT_EMPTY);
|
|
MmioWrite8(THR, *Buffer);
|
|
}
|
|
|
|
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
|
|
)
|
|
{
|
|
UINT32 LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
|
|
UINT32 RBR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_RBR_REG;
|
|
UINTN Count;
|
|
|
|
for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {
|
|
while ((MmioRead8(LSR) & UART_LSR_RX_FIFO_E_MASK) == UART_LSR_RX_FIFO_E_EMPTY);
|
|
*Buffer = MmioRead8(RBR);
|
|
}
|
|
|
|
return NumberOfBytes;
|
|
}
|
|
|
|
|
|
/**
|
|
Check to see if any data is avaiable to be read from the debug device.
|
|
|
|
@retval EFI_SUCCESS At least one byte of data is avaiable to be read
|
|
@retval EFI_NOT_READY No data is avaiable to be read
|
|
@retval EFI_DEVICE_ERROR The serial device is not functioning properly
|
|
|
|
**/
|
|
BOOLEAN
|
|
EFIAPI
|
|
SerialPortPoll (
|
|
VOID
|
|
)
|
|
{
|
|
UINT32 LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
|
|
|
|
if ((MmioRead8(LSR) & UART_LSR_RX_FIFO_E_MASK) == UART_LSR_RX_FIFO_E_NOT_EMPTY) {
|
|
return TRUE;
|
|
} else {
|
|
return FALSE;
|
|
}
|
|
}
|
|
|