EmbeddedPkg/Library/TemplateSerialPortExtLib/TemplateSerialPortExtLib.c

   1 /** @file
   2   Extended Serial I/O Port library functions
   3
   4   Copyright (c) 2012, ARM Ltd. All rights reserved.
   5
   6   This program and the accompanying materials
   7   are licensed and made available under the terms and conditions of the BSD License
   8   which accompanies this distribution.  The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #include <Base.h>
  17
  18 #include <Library/SerialPortLib.h>
  19 #include <Library/SerialPortExtLib.h>
  20
  21 /**
  22   Set the serial device control bits.
  23
  24   @return    Always return RETURN_UNSUPPORTED.
  25
  26 **/
  27 RETURN_STATUS
  28 EFIAPI
  29 SerialPortSetControl (
  30     IN UINT32                   Control
  31   )
  32 {
  33   return RETURN_UNSUPPORTED;
  34 }
  35
  36 /**
  37   Get the serial device control bits.
  38
  39   @param  Control                 Control signals read from the serial device.
  40
  41   @retval EFI_SUCCESS             The control bits were read from the serial device.
  42   @retval EFI_DEVICE_ERROR        The serial device is not functioning correctly.
  43
  44 **/
  45 RETURN_STATUS
  46 EFIAPI
  47 SerialPortGetControl (
  48   OUT UINT32                  *Control
  49   )
  50 {
  51   if (SerialPortPoll ()) {
  52     // If a character is pending don't set EFI_SERIAL_INPUT_BUFFER_EMPTY
  53     *Control = EFI_SERIAL_OUTPUT_BUFFER_EMPTY;
  54   } else {
  55     *Control = EFI_SERIAL_INPUT_BUFFER_EMPTY | EFI_SERIAL_OUTPUT_BUFFER_EMPTY;
  56   }
  57   return EFI_SUCCESS;
  58 }
  59
  60 /**
  61   Set the serial device attributes.
  62
  63   @return    Always return RETURN_UNSUPPORTED.
  64
  65 **/
  66 RETURN_STATUS
  67 EFIAPI
  68 SerialPortSetAttributes (
  69   IN UINT64              BaudRate,
  70   IN UINT32              ReceiveFifoDepth,
  71   IN UINT32              Timeout,
  72   IN EFI_PARITY_TYPE     Parity,
  73   IN UINT8               DataBits,
  74   IN EFI_STOP_BITS_TYPE  StopBits
  75   )
  76 {
  77   return RETURN_UNSUPPORTED;
  78 }
  79