/** @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 - 2011, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#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_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_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   A pointer to a buffer that is filled in with the keystroke
                information for the key that was pressed.

  @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
