audk/ArmPlatformPkg/Library/PL011SerialPortLib/PL011SerialPortExtLib.c

/** @file
  Serial I/O Port library functions with no library constructor/destructor

  Copyright (c) 2012-2013, ARM Ltd. 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/IoLib.h>
#include <Library/PcdLib.h>
#include <Library/SerialPortExtLib.h>

#include <Drivers/PL011Uart.h>

/**
  Set new attributes to PL011.

  @param  BaudRate                The baud rate of the serial device. If the baud rate is not supported,
                                  the speed will be reduced down to the nearest supported one and the
                                  variable's value will be updated accordingly.
  @param  ReceiveFifoDepth        The number of characters the device will buffer on input. If the specified
                                  value is not supported, the variable's value will be reduced down to the
                                  nearest supported one.
  @param  Timeout                 If applicable, the number of microseconds the device will wait
                                  before timing out a Read or a Write operation.
  @param  Parity                  If applicable, this is the EFI_PARITY_TYPE that is computed or checked
                                  as each character is transmitted or received. If the device does not
                                  support parity, the value is the default parity value.
  @param  DataBits                The number of data bits in each character
  @param  StopBits                If applicable, the EFI_STOP_BITS_TYPE number of stop bits per character.
                                  If the device does not support stop bits, the value is the default stop
                                  bit value.

  @retval EFI_SUCCESS             All attributes were set correctly on the serial device.
  @retval EFI_INVALID_PARAMETERS  One or more of the attributes has an unsupported value.

**/
RETURN_STATUS
EFIAPI
SerialPortSetAttributes (
  IN OUT UINT64              *BaudRate,
  IN OUT UINT32              *ReceiveFifoDepth,
  IN OUT UINT32              *Timeout,
  IN OUT EFI_PARITY_TYPE     *Parity,
  IN OUT UINT8               *DataBits,
  IN OUT EFI_STOP_BITS_TYPE  *StopBits
  )
{
  return PL011UartInitializePort (
        (UINTN)PcdGet64 (PcdSerialRegisterBase),
        BaudRate,
        ReceiveFifoDepth,
        Parity,
        DataBits,
        StopBits);
}

/**
  Set the serial device control bits.

  @param  Control                 Control bits which are to be set on the serial device.

  @retval EFI_SUCCESS             The new control bits were set on the serial device.
  @retval EFI_UNSUPPORTED         The serial device does not support this operation.
  @retval EFI_DEVICE_ERROR        The serial device is not functioning correctly.

**/
RETURN_STATUS
EFIAPI
SerialPortSetControl (
  IN UINT32                  Control
  )
{
  return PL011UartSetControl ((UINTN)PcdGet64 (PcdSerialRegisterBase), Control);
}

/**
  Get the serial device control bits.

  @param  Control                 Control signals read from the serial device.

  @retval EFI_SUCCESS             The control bits were read from the serial device.
  @retval EFI_DEVICE_ERROR        The serial device is not functioning correctly.

**/
RETURN_STATUS
EFIAPI
SerialPortGetControl (
  OUT UINT32                  *Control
  )
{
  return PL011UartGetControl ((UINTN)PcdGet64 (PcdSerialRegisterBase), Control);
}