/** @file
  Simple Text Input protocol from the UEFI 2.0 specification.

  Abstraction of a very simple input device like a keyboard or serial
  terminal.

  Copyright (c) 2006 - 2009, 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.             

**/

#ifndef __SIMPLE_TEXT_IN_PROTOCOL_H__
#define __SIMPLE_TEXT_IN_PROTOCOL_H__

#define EFI_SIMPLE_TEXT_INPUT_PROTOCOL_GUID \
  { \
    0x387477c1, 0x69c7, 0x11d2, {0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b } \
  }

typedef struct _EFI_SIMPLE_TEXT_INPUT_PROTOCOL  EFI_SIMPLE_TEXT_INPUT_PROTOCOL;

///
/// Protocol GUID name defined in EFI1.1.
/// 
#define SIMPLE_INPUT_PROTOCOL   EFI_SIMPLE_TEXT_INPUT_PROTOCOL_GUID

///
/// Protocol name in EFI1.1 for backward-compatible.
/// 
typedef struct _EFI_SIMPLE_TEXT_INPUT_PROTOCOL  SIMPLE_INPUT_INTERFACE;

///
/// The keystroke information for the key that was pressed.
///
typedef struct {
  UINT16  ScanCode;
  CHAR16  UnicodeChar;
} EFI_INPUT_KEY;

//
// Required unicode control chars
//
#define CHAR_NULL             0x0000
#define CHAR_BACKSPACE        0x0008
#define CHAR_TAB              0x0009
#define CHAR_LINEFEED         0x000A
#define CHAR_CARRIAGE_RETURN  0x000D

//
// EFI Scan codes
//
#define SCAN_NULL       0x0000
#define SCAN_UP         0x0001
#define SCAN_DOWN       0x0002
#define SCAN_RIGHT      0x0003
#define SCAN_LEFT       0x0004
#define SCAN_HOME       0x0005
#define SCAN_END        0x0006
#define SCAN_INSERT     0x0007
#define SCAN_DELETE     0x0008
#define SCAN_PAGE_UP    0x0009
#define SCAN_PAGE_DOWN  0x000A
#define SCAN_F1         0x000B
#define SCAN_F2         0x000C
#define SCAN_F3         0x000D
#define SCAN_F4         0x000E
#define SCAN_F5         0x000F
#define SCAN_F6         0x0010
#define SCAN_F7         0x0011
#define SCAN_F8         0x0012
#define SCAN_F9         0x0013
#define SCAN_F10        0x0014
#define SCAN_F11        0x0015
#define SCAN_F12        0x0016
#define SCAN_ESC        0x0017

/**
  Reset the input device and optionally run diagnostics

  @param  This                 Protocol instance pointer.
  @param  ExtendedVerification Driver may perform diagnostics on reset.

  @retval EFI_SUCCESS          The device was reset.
  @retval EFI_DEVICE_ERROR     The device is not functioning properly and could not be reset.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_INPUT_RESET)(
  IN EFI_SIMPLE_TEXT_INPUT_PROTOCOL       *This,
  IN BOOLEAN                              ExtendedVerification
  );

/**
  Reads the next keystroke from the input device. The WaitForKey Event can 
  be used to test for existence of a keystroke via WaitForEvent () call.

  @param  This Protocol instance pointer.
  @param  Key  Driver may perform diagnostics on reset.

  @retval EFI_SUCCESS      The keystroke information was returned.
  @retval EFI_NOT_READY    There was no keystroke data available.
  @retval EFI_DEVICE_ERROR The keystroke information was not returned due to
                           hardware errors.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_INPUT_READ_KEY)(
  IN EFI_SIMPLE_TEXT_INPUT_PROTOCOL       *This,
  OUT EFI_INPUT_KEY                       *Key
  );

///
/// The EFI_SIMPLE_TEXT_INPUT_PROTOCOL is used on the ConsoleIn device. 
/// It is the minimum required protocol for ConsoleIn.
///
struct _EFI_SIMPLE_TEXT_INPUT_PROTOCOL {
  EFI_INPUT_RESET     Reset;
  EFI_INPUT_READ_KEY  ReadKeyStroke;
  ///
  /// Event to use with WaitForEvent() to wait for a key to be available
  ///
  EFI_EVENT           WaitForKey;
};

extern EFI_GUID gEfiSimpleTextInProtocolGuid;

#endif