EmbeddedPkg: Introduced a separate SerialPortExtLib library

[mirror_edk2.git] / EmbeddedPkg / Library / TemplateSerialPortExtLib / TemplateSerialPortExtLib.c

/** @file\r
  Extended Serial I/O Port library functions\r
\r
  Copyright (c) 2012, ARM Ltd. All rights reserved.\r
  \r
  This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include <Base.h>\r
\r
#include <Library/SerialPortLib.h>\r
#include <Library/SerialPortExtLib.h>\r
\r
/**\r
  Set the serial device control bits.\r
\r
  @return    Always return RETURN_UNSUPPORTED.\r
\r
**/\r
RETURN_STATUS\r
EFIAPI\r
SerialPortSetControl (\r
    IN UINT32                   Control\r
  )\r
{\r
  return RETURN_UNSUPPORTED;\r
}\r
\r
/**\r
  Get the serial device control bits.\r
\r
  @param  Control                 Control signals read from the serial device.\r
\r
  @retval EFI_SUCCESS             The control bits were read from the serial device.\r
  @retval EFI_DEVICE_ERROR        The serial device is not functioning correctly.\r
\r
**/\r
RETURN_STATUS\r
EFIAPI\r
SerialPortGetControl (\r
  OUT UINT32                  *Control\r
  )\r
{\r
  if (SerialPortPoll ()) {\r
    // If a character is pending don't set EFI_SERIAL_INPUT_BUFFER_EMPTY\r
    *Control = EFI_SERIAL_OUTPUT_BUFFER_EMPTY;\r
  } else {\r
    *Control = EFI_SERIAL_INPUT_BUFFER_EMPTY | EFI_SERIAL_OUTPUT_BUFFER_EMPTY;\r
  }\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  Set the serial device attributes.\r
\r
  @return    Always return RETURN_UNSUPPORTED.\r
\r
**/\r
RETURN_STATUS\r
EFIAPI\r
SerialPortSetAttributes (\r
  IN UINT64              BaudRate,\r
  IN UINT32              ReceiveFifoDepth,\r
  IN UINT32              Timeout,\r
  IN EFI_PARITY_TYPE     Parity,\r
  IN UINT8               DataBits,\r
  IN EFI_STOP_BITS_TYPE  StopBits\r
  )\r
{\r
  return RETURN_UNSUPPORTED;\r
}\r
\r