[mirror_edk2.git] / MdeModulePkg / Universal / Console / TerminalDxe / TerminalConIn.c

/** @file\r
  Implementation for EFI_SIMPLE_TEXT_INPUT_PROTOCOL protocol.\r
\r
Copyright (c) 2006 - 2008, Intel Corporation. <BR>\r
All rights reserved. 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 "Terminal.h"\r
\r
\r
/**\r
  Reads the next keystroke from the input device. The WaitForKey Event can\r
  be used to test for existence of a keystroke via WaitForEvent () call.\r
\r
  @param  TerminalDevice           Terminal driver private structure\r
  @param  KeyData                  A pointer to a buffer that is filled in with the\r
                                   keystroke state data for the key that was\r
                                   pressed.\r
\r
  @retval EFI_SUCCESS              The keystroke information was returned.\r
  @retval EFI_NOT_READY            There was no keystroke data available.\r
  @retval EFI_DEVICE_ERROR         The keystroke information was not returned due\r
                                   to hardware errors.\r
  @retval EFI_INVALID_PARAMETER    KeyData is NULL.\r
\r
**/\r
EFI_STATUS\r
ReadKeyStrokeWorker (\r
  IN  TERMINAL_DEV *TerminalDevice,\r
  OUT EFI_KEY_DATA *KeyData\r
  )\r
{\r
  EFI_STATUS                      Status;\r
  LIST_ENTRY                      *Link;\r
  LIST_ENTRY                      *NotifyList;\r
  TERMINAL_CONSOLE_IN_EX_NOTIFY   *CurrentNotify;\r
\r
  if (KeyData == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  //\r
  // Initialize *Key to nonsense value.\r
  //\r
  KeyData->Key.ScanCode    = SCAN_NULL;\r
  KeyData->Key.UnicodeChar = 0;\r
\r
  Status = TerminalConInCheckForKey (&TerminalDevice->SimpleInput);\r
  if (EFI_ERROR (Status)) {\r
    return EFI_NOT_READY;\r
  }\r
\r
  if (!EfiKeyFiFoRemoveOneKey (TerminalDevice, &KeyData->Key)) {\r
    return EFI_NOT_READY;\r
  }\r
\r
  KeyData->KeyState.KeyShiftState  = 0;\r
  KeyData->KeyState.KeyToggleState = 0;\r
\r
  //\r
  // Invoke notification functions if exist\r
  //\r
  NotifyList = &TerminalDevice->NotifyList;\r
  for (Link = GetFirstNode (NotifyList); !IsNull (NotifyList,Link); Link = GetNextNode (NotifyList,Link)) {\r
    CurrentNotify = CR (\r
                      Link,\r
                      TERMINAL_CONSOLE_IN_EX_NOTIFY,\r
                      NotifyEntry,\r
                      TERMINAL_CONSOLE_IN_EX_NOTIFY_SIGNATURE\r
                      );\r
    if (IsKeyRegistered (&CurrentNotify->KeyData, KeyData)) {\r
      CurrentNotify->KeyNotificationFn (KeyData);\r
    }\r
  }\r
\r
  return EFI_SUCCESS;\r
\r
}\r
\r
/**\r
  Implements EFI_SIMPLE_TEXT_INPUT_PROTOCOL.Reset().\r
  This driver only perform dependent serial device reset regardless of\r
  the value of ExtendeVerification\r
\r
  @param  This                     Indicates the calling context.\r
  @param  ExtendedVerification     Skip by this driver.\r
\r
  @retval EFI_SUCCESS              The reset operation succeeds.\r
  @retval EFI_DEVICE_ERROR         The dependent serial port reset fails.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
TerminalConInReset (\r
  IN  EFI_SIMPLE_TEXT_INPUT_PROTOCOL  *This,\r
  IN  BOOLEAN                         ExtendedVerification\r
  )\r
{\r
  EFI_STATUS    Status;\r
  TERMINAL_DEV  *TerminalDevice;\r
\r
  TerminalDevice = TERMINAL_CON_IN_DEV_FROM_THIS (This);\r
\r
  //\r
  // Report progress code here\r
  //\r
  REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r
    EFI_PROGRESS_CODE,\r
    PcdGet32 (PcdStatusCodeValueRemoteConsoleReset),\r
    TerminalDevice->DevicePath\r
    );\r
\r
  Status = TerminalDevice->SerialIo->Reset (TerminalDevice->SerialIo);\r
\r
  //\r
  // Make all the internal buffer empty for keys\r
  //\r
  TerminalDevice->RawFiFo->Head     = TerminalDevice->RawFiFo->Tail;\r
  TerminalDevice->UnicodeFiFo->Head = TerminalDevice->UnicodeFiFo->Tail;\r
  TerminalDevice->EfiKeyFiFo->Head  = TerminalDevice->EfiKeyFiFo->Tail;\r
\r
  if (EFI_ERROR (Status)) {\r
    REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r
      EFI_ERROR_CODE | EFI_ERROR_MINOR,\r
      PcdGet32 (PcdStatusCodeValueRemoteConsoleError),\r
      TerminalDevice->DevicePath\r
      );\r
  }\r
\r
  return Status;\r
}\r
\r
/**\r
  Implements EFI_SIMPLE_TEXT_INPUT_PROTOCOL.ReadKeyStroke().\r
\r
  @param  This                Indicates the calling context.\r
  @param  Key                 A pointer to a buffer that is filled in with the\r
                              keystroke information for the key that was sent\r
                              from terminal.\r
\r
  @retval EFI_SUCCESS         The keystroke information is returned successfully.\r
  @retval EFI_NOT_READY       There is no keystroke data available.\r
  @retval EFI_DEVICE_ERROR    The dependent serial device encounters error.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
TerminalConInReadKeyStroke (\r
  IN  EFI_SIMPLE_TEXT_INPUT_PROTOCOL  *This,\r
  OUT EFI_INPUT_KEY                   *Key\r
  )\r
{\r
  TERMINAL_DEV  *TerminalDevice;\r
  EFI_STATUS    Status;\r
  EFI_KEY_DATA  KeyData;\r
\r
  //\r
  //  get TERMINAL_DEV from "This" parameter.\r
  //\r
  TerminalDevice  = TERMINAL_CON_IN_DEV_FROM_THIS (This);\r
\r
  Status = ReadKeyStrokeWorker (TerminalDevice, &KeyData);\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  CopyMem (Key, &KeyData.Key, sizeof (EFI_INPUT_KEY));\r
\r
  return EFI_SUCCESS;\r
\r
}\r
\r
/**\r
  Check if the key already has been registered.\r
\r
  If both RegsiteredData and InputData is NULL, then ASSERT().\r
\r
  @param  RegsiteredData           A pointer to a buffer that is filled in with the\r
                                   keystroke state data for the key that was\r
                                   registered.\r
  @param  InputData                A pointer to a buffer that is filled in with the\r
                                   keystroke state data for the key that was\r
                                   pressed.\r
\r
  @retval TRUE                     Key be pressed matches a registered key.\r
  @retval FLASE                    Match failed.\r
\r
**/\r
BOOLEAN\r
IsKeyRegistered (\r
  IN EFI_KEY_DATA  *RegsiteredData,\r
  IN EFI_KEY_DATA  *InputData\r
  )\r
{\r
  ASSERT (RegsiteredData != NULL && InputData != NULL);\r
\r
  if ((RegsiteredData->Key.ScanCode    != InputData->Key.ScanCode) ||\r
      (RegsiteredData->Key.UnicodeChar != InputData->Key.UnicodeChar)) {\r
    return FALSE;\r
  }\r
\r
  return TRUE;\r
}\r
\r
\r
\r
/**\r
  Event notification function for EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL.WaitForKeyEx event\r
  Signal the event if there is key available\r
\r
  @param  Event                    Indicates the event that invoke this function.\r
  @param  Context                  Indicates the calling context.\r
\r
**/\r
VOID\r
EFIAPI\r
TerminalConInWaitForKeyEx (\r
  IN  EFI_EVENT       Event,\r
  IN  VOID            *Context\r
  )\r
{\r
  TERMINAL_DEV            *TerminalDevice;\r
\r
  TerminalDevice  = TERMINAL_CON_IN_EX_DEV_FROM_THIS (Context);\r
\r
  TerminalConInWaitForKey (Event, &TerminalDevice->SimpleInput);\r
\r
}\r
\r
//\r
// Simple Text Input Ex protocol functions\r
//\r
\r
/**\r
  Reset the input device and optionally run diagnostics\r
\r
  @param  This                     Protocol instance pointer.\r
  @param  ExtendedVerification     Driver may perform diagnostics on reset.\r
\r
  @retval EFI_SUCCESS              The device was reset.\r
  @retval EFI_DEVICE_ERROR         The device is not functioning properly and could\r
                                   not be reset.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
TerminalConInResetEx (\r
  IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *This,\r
  IN BOOLEAN                            ExtendedVerification\r
  )\r
{\r
  EFI_STATUS              Status;\r
  TERMINAL_DEV            *TerminalDevice;\r
\r
  TerminalDevice = TERMINAL_CON_IN_EX_DEV_FROM_THIS (This);\r
\r
  Status = TerminalDevice->SimpleInput.Reset (&TerminalDevice->SimpleInput, ExtendedVerification);\r
  if (EFI_ERROR (Status)) {\r
    return EFI_DEVICE_ERROR;\r
  }\r
\r
  return EFI_SUCCESS;\r
\r
}\r
\r
\r
/**\r
  Reads the next keystroke from the input device. The WaitForKey Event can\r
  be used to test for existence of a keystroke via WaitForEvent () call.\r
\r
  @param  This                     Protocol instance pointer.\r
  @param  KeyData                  A pointer to a buffer that is filled in with the\r
                                   keystroke state data for the key that was\r
                                   pressed.\r
\r
  @retval EFI_SUCCESS              The keystroke information was returned.\r
  @retval EFI_NOT_READY            There was no keystroke data available.\r
  @retval EFI_DEVICE_ERROR         The keystroke information was not returned due\r
                                   to hardware errors.\r
  @retval EFI_INVALID_PARAMETER    KeyData is NULL.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
TerminalConInReadKeyStrokeEx (\r
  IN  EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,\r
  OUT EFI_KEY_DATA                      *KeyData\r
  )\r
{\r
  TERMINAL_DEV                    *TerminalDevice;\r
\r
  if (KeyData == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  TerminalDevice = TERMINAL_CON_IN_EX_DEV_FROM_THIS (This);\r
\r
  return ReadKeyStrokeWorker (TerminalDevice, KeyData);\r
\r
}\r
\r
\r
/**\r
  Set certain state for the input device.\r
\r
  @param  This                     Protocol instance pointer.\r
  @param  KeyToggleState           A pointer to the EFI_KEY_TOGGLE_STATE to set the\r
                                   state for the input device.\r
\r
  @retval EFI_SUCCESS              The device state was set successfully.\r
  @retval EFI_DEVICE_ERROR         The device is not functioning correctly and\r
                                   could not have the setting adjusted.\r
  @retval EFI_UNSUPPORTED          The device does not have the ability to set its\r
                                   state.\r
  @retval EFI_INVALID_PARAMETER    KeyToggleState is NULL.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
TerminalConInSetState (\r
  IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *This,\r
  IN EFI_KEY_TOGGLE_STATE               *KeyToggleState\r
  )\r
{\r
  if (KeyToggleState == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
\r
/**\r
  Register a notification function for a particular keystroke for the input device.\r
\r
  @param  This                     Protocol instance pointer.\r
  @param  KeyData                  A pointer to a buffer that is filled in with the\r
                                   keystroke information data for the key that was\r
                                   pressed.\r
  @param  KeyNotificationFunction  Points to the function to be called when the key\r
                                   sequence is typed specified by KeyData.\r
  @param  NotifyHandle             Points to the unique handle assigned to the\r
                                   registered notification.\r
\r
  @retval EFI_SUCCESS              The notification function was registered\r
                                   successfully.\r
  @retval EFI_OUT_OF_RESOURCES     Unable to allocate resources for necessary data\r
                                   structures.\r
  @retval EFI_INVALID_PARAMETER    KeyData or NotifyHandle is NULL.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
TerminalConInRegisterKeyNotify (\r
  IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *This,\r
  IN EFI_KEY_DATA                       *KeyData,\r
  IN EFI_KEY_NOTIFY_FUNCTION            KeyNotificationFunction,\r
  OUT EFI_HANDLE                        *NotifyHandle\r
  )\r
{\r
  TERMINAL_DEV                    *TerminalDevice;\r
  TERMINAL_CONSOLE_IN_EX_NOTIFY   *NewNotify;\r
  LIST_ENTRY                      *Link;\r
  LIST_ENTRY                      *NotifyList;\r
  TERMINAL_CONSOLE_IN_EX_NOTIFY   *CurrentNotify;\r
\r
  if (KeyData == NULL || NotifyHandle == NULL || KeyNotificationFunction == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  TerminalDevice = TERMINAL_CON_IN_EX_DEV_FROM_THIS (This);\r
\r
  //\r
  // Return EFI_SUCCESS if the (KeyData, NotificationFunction) is already registered.\r
  //\r
  NotifyList = &TerminalDevice->NotifyList;\r
  for (Link = GetFirstNode (NotifyList); !IsNull (NotifyList,Link); Link = GetNextNode (NotifyList,Link)) {\r
    CurrentNotify = CR (\r
                      Link,\r
                      TERMINAL_CONSOLE_IN_EX_NOTIFY,\r
                      NotifyEntry,\r
                      TERMINAL_CONSOLE_IN_EX_NOTIFY_SIGNATURE\r
                      );\r
    if (IsKeyRegistered (&CurrentNotify->KeyData, KeyData)) {\r
      if (CurrentNotify->KeyNotificationFn == KeyNotificationFunction) {\r
        *NotifyHandle = CurrentNotify->NotifyHandle;\r
        return EFI_SUCCESS;\r
      }\r
    }\r
  }\r
\r
  //\r
  // Allocate resource to save the notification function\r
  //\r
  NewNotify = (TERMINAL_CONSOLE_IN_EX_NOTIFY *) AllocateZeroPool (sizeof (TERMINAL_CONSOLE_IN_EX_NOTIFY));\r
  if (NewNotify == NULL) {\r
    return EFI_OUT_OF_RESOURCES;\r
  }\r
\r
  NewNotify->Signature         = TERMINAL_CONSOLE_IN_EX_NOTIFY_SIGNATURE;\r
  NewNotify->KeyNotificationFn = KeyNotificationFunction;\r
  NewNotify->NotifyHandle      = (EFI_HANDLE) NewNotify;\r
  CopyMem (&NewNotify->KeyData, KeyData, sizeof (KeyData));\r
  InsertTailList (&TerminalDevice->NotifyList, &NewNotify->NotifyEntry);\r
\r
  *NotifyHandle                = NewNotify->NotifyHandle;\r
\r
  return EFI_SUCCESS;\r
}\r
\r
\r
/**\r
  Remove a registered notification function from a particular keystroke.\r
\r
  @param  This                     Protocol instance pointer.\r
  @param  NotificationHandle       The handle of the notification function being\r
                                   unregistered.\r
\r
  @retval EFI_SUCCESS              The notification function was unregistered\r
                                   successfully.\r
  @retval EFI_INVALID_PARAMETER    The NotificationHandle is invalid.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
TerminalConInUnregisterKeyNotify (\r
  IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *This,\r
  IN EFI_HANDLE                         NotificationHandle\r
  )\r
{\r
  TERMINAL_DEV                    *TerminalDevice;\r
  LIST_ENTRY                      *Link;\r
  TERMINAL_CONSOLE_IN_EX_NOTIFY   *CurrentNotify;\r
  LIST_ENTRY                      *NotifyList;\r
\r
  if (NotificationHandle == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  if (((TERMINAL_CONSOLE_IN_EX_NOTIFY *) NotificationHandle)->Signature != TERMINAL_CONSOLE_IN_EX_NOTIFY_SIGNATURE) {\r
    return EFI_INVALID_PARAMETER;\r
  } \r
  \r
  TerminalDevice = TERMINAL_CON_IN_EX_DEV_FROM_THIS (This);\r
\r
  NotifyList = &TerminalDevice->NotifyList;\r
  for (Link = GetFirstNode (NotifyList); !IsNull (NotifyList,Link); Link = GetNextNode (NotifyList,Link)) {\r
    CurrentNotify = CR (\r
                      Link,\r
                      TERMINAL_CONSOLE_IN_EX_NOTIFY,\r
                      NotifyEntry,\r
                      TERMINAL_CONSOLE_IN_EX_NOTIFY_SIGNATURE\r
                      );\r
    if (CurrentNotify->NotifyHandle == NotificationHandle) {\r
      //\r
      // Remove the notification function from NotifyList and free resources\r
      //\r
      RemoveEntryList (&CurrentNotify->NotifyEntry);\r
\r
      gBS->FreePool (CurrentNotify);\r
      return EFI_SUCCESS;\r
    }\r
  }\r
\r
  //\r
  // Can not find the matching entry in database.\r
  //\r
  return EFI_INVALID_PARAMETER;\r
}\r
\r
/**\r
  Translate raw data into Unicode (according to different encode), and\r
  translate Unicode into key information. (according to different standard).\r
\r
  @param  TerminalDevice       Terminal driver private structure.\r
\r
**/\r
VOID\r
TranslateRawDataToEfiKey (\r
  IN  TERMINAL_DEV      *TerminalDevice\r
  )\r
{\r
  switch (TerminalDevice->TerminalType) {\r
\r
  case PCANSITYPE:\r
  case VT100TYPE:\r
  case VT100PLUSTYPE:\r
    AnsiRawDataToUnicode (TerminalDevice);\r
    UnicodeToEfiKey (TerminalDevice);\r
    break;\r
\r
  case VTUTF8TYPE:\r
    //\r
    // Process all the raw data in the RawFIFO,\r
    // put the processed key into UnicodeFIFO.\r
    //\r
    VTUTF8RawDataToUnicode (TerminalDevice);\r
\r
    //\r
    // Translate all the Unicode data in the UnicodeFIFO to Efi key,\r
    // then put into EfiKeyFIFO.\r
    //\r
    UnicodeToEfiKey (TerminalDevice);\r
\r
    break;\r
  }\r
}\r
\r
/**\r
  Event notification function for EFI_SIMPLE_TEXT_INPUT_PROTOCOL.WaitForKey event\r
  Signal the event if there is key available\r
\r
  @param  Event                    Indicates the event that invoke this function.\r
  @param  Context                  Indicates the calling context.\r
\r
**/\r
VOID\r
EFIAPI\r
TerminalConInWaitForKey (\r
  IN  EFI_EVENT       Event,\r
  IN  VOID            *Context\r
  )\r
{\r
  //\r
  // Someone is waiting on the keystroke event, if there's\r
  // a key pending, signal the event\r
  //\r
  // Context is the pointer to EFI_SIMPLE_TEXT_INPUT_PROTOCOL\r
  //\r
  if (!EFI_ERROR (TerminalConInCheckForKey (Context))) {\r
\r
    gBS->SignalEvent (Event);\r
  }\r
}\r
\r
\r
/**\r
  Check for a pending key in the Efi Key FIFO or Serial device buffer.\r
\r
  @param  This                     Indicates the calling context.\r
\r
  @retval EFI_SUCCESS              There is key pending.\r
  @retval EFI_NOT_READY            There is no key pending.\r
  @retval EFI_DEVICE_ERROR         If Serial IO is not attached to serial device.\r
\r
**/\r
EFI_STATUS\r
TerminalConInCheckForKey (\r
  IN  EFI_SIMPLE_TEXT_INPUT_PROTOCOL  *This\r
  )\r
{\r
  EFI_STATUS              Status;\r
  TERMINAL_DEV            *TerminalDevice;\r
  UINT32                  Control;\r
  UINT8                   Input;\r
  EFI_SERIAL_IO_MODE      *Mode;\r
  EFI_SERIAL_IO_PROTOCOL  *SerialIo;\r
  UINTN                   SerialInTimeOut;\r
\r
  TerminalDevice  = TERMINAL_CON_IN_DEV_FROM_THIS (This);\r
\r
  SerialIo        = TerminalDevice->SerialIo;\r
  if (SerialIo == NULL) {\r
    return EFI_DEVICE_ERROR;\r
  }\r
  //\r
  //  if current timeout value for serial device is not identical with\r
  //  the value saved in TERMINAL_DEV structure, then recalculate the\r
  //  timeout value again and set serial attribute according to this value.\r
  //\r
  Mode = SerialIo->Mode;\r
  if (Mode->Timeout != TerminalDevice->SerialInTimeOut) {\r
\r
    SerialInTimeOut = 0;\r
    if (Mode->BaudRate != 0) {\r
      //\r
      // According to BAUD rate to calculate the timeout value.\r
      //\r
      SerialInTimeOut = (1 + Mode->DataBits + Mode->StopBits) * 2 * 1000000 / (UINTN) Mode->BaudRate;\r
    }\r
\r
    Status = SerialIo->SetAttributes (\r
                        SerialIo,\r
                        Mode->BaudRate,\r
                        Mode->ReceiveFifoDepth,\r
                        (UINT32) SerialInTimeOut,\r
                        (EFI_PARITY_TYPE) (Mode->Parity),\r
                        (UINT8) Mode->DataBits,\r
                        (EFI_STOP_BITS_TYPE) (Mode->StopBits)\r
                        );\r
\r
    if (EFI_ERROR (Status)) {\r
      TerminalDevice->SerialInTimeOut = 0;\r
    } else {\r
      TerminalDevice->SerialInTimeOut = SerialInTimeOut;\r
    }\r
  }\r
  //\r
  //  Check whether serial buffer is empty.\r
  //\r
  Status = SerialIo->GetControl (SerialIo, &Control);\r
\r
  if ((Control & EFI_SERIAL_INPUT_BUFFER_EMPTY) != 0) {\r
    //\r
    // Translate all the raw data in RawFIFO into EFI Key,\r
    // according to different terminal type supported.\r
    //\r
    TranslateRawDataToEfiKey (TerminalDevice);\r
\r
    //\r
    //  if there is pre-fetched Efi Key in EfiKeyFIFO buffer,\r
    //  return directly.\r
    //\r
    if (!IsEfiKeyFiFoEmpty (TerminalDevice)) {\r
      return EFI_SUCCESS;\r
    } else {\r
      return EFI_NOT_READY;\r
    }\r
  }\r
  //\r
  // Fetch all the keys in the serial buffer,\r
  // and insert the byte stream into RawFIFO.\r
  //\r
  do {\r
\r
    Status = GetOneKeyFromSerial (TerminalDevice->SerialIo, &Input);\r
\r
    if (EFI_ERROR (Status)) {\r
      if (Status == EFI_DEVICE_ERROR) {\r
        REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r
          EFI_ERROR_CODE | EFI_ERROR_MINOR,\r
          PcdGet32 (PcdStatusCodeValueRemoteConsoleInputError),\r
          TerminalDevice->DevicePath\r
          );\r
      }\r
      break;\r
    }\r
\r
    RawFiFoInsertOneKey (TerminalDevice, Input);\r
  } while (TRUE);\r
\r
  //\r
  // Translate all the raw data in RawFIFO into EFI Key,\r
  // according to different terminal type supported.\r
  //\r
  TranslateRawDataToEfiKey (TerminalDevice);\r
\r
  if (IsEfiKeyFiFoEmpty (TerminalDevice)) {\r
    return EFI_NOT_READY;\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  Get one key out of serial buffer.\r
\r
  @param  SerialIo           Serial I/O protocol attached to the serial device.\r
  @param  Output             The fetched key.\r
\r
  @retval EFI_NOT_READY      If serial buffer is empty.\r
  @retval EFI_DEVICE_ERROR   If reading serial buffer encounter error.\r
  @retval EFI_SUCCESS        If reading serial buffer successfully, put\r
                             the fetched key to the parameter output.\r
\r
**/\r
EFI_STATUS\r
GetOneKeyFromSerial (\r
  EFI_SERIAL_IO_PROTOCOL  *SerialIo,\r
  UINT8                   *Output\r
  )\r
{\r
  EFI_STATUS  Status;\r
  UINTN       Size;\r
\r
  Size    = 1;\r
  *Output = 0;\r
\r
  //\r
  // Read one key from serial I/O device.\r
  //\r
  Status  = SerialIo->Read (SerialIo, &Size, Output);\r
\r
  if (EFI_ERROR (Status)) {\r
\r
    if (Status == EFI_TIMEOUT) {\r
      return EFI_NOT_READY;\r
    }\r
\r
    return EFI_DEVICE_ERROR;\r
\r
  }\r
\r
  if (*Output == 0) {\r
    return EFI_NOT_READY;\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  Insert one byte raw data into the Raw Data FIFO.\r
\r
  @param  TerminalDevice       Terminal driver private structure.\r
  @param  Input                The key will be input.\r
\r
  @retval TRUE                 If insert successfully.\r
  @retval FLASE                If Raw Data buffer is full before key insertion,\r
                               and the key is lost.\r
\r
**/\r
BOOLEAN\r
RawFiFoInsertOneKey (\r
  TERMINAL_DEV      *TerminalDevice,\r
  UINT8             Input\r
  )\r
{\r
  UINT8 Tail;\r
\r
  Tail = TerminalDevice->RawFiFo->Tail;\r
\r
  if (IsRawFiFoFull (TerminalDevice)) {\r
    //\r
    // Raw FIFO is full\r
    //\r
    return FALSE;\r
  }\r
\r
  TerminalDevice->RawFiFo->Data[Tail]  = Input;\r
\r
  TerminalDevice->RawFiFo->Tail        = (UINT8) ((Tail + 1) % (RAW_FIFO_MAX_NUMBER + 1));\r
\r
  return TRUE;\r
}\r
\r
/**\r
  Remove one pre-fetched key out of the Raw Data FIFO.\r
\r
  @param  TerminalDevice       Terminal driver private structure.\r
  @param  Output               The key will be removed.\r
\r
  @retval TRUE                 If insert successfully.\r
  @retval FLASE                If Raw Data FIFO buffer is empty before remove operation.\r
\r
**/\r
BOOLEAN\r
RawFiFoRemoveOneKey (\r
  TERMINAL_DEV  *TerminalDevice,\r
  UINT8         *Output\r
  )\r
{\r
  UINT8 Head;\r
\r
  Head = TerminalDevice->RawFiFo->Head;\r
\r
  if (IsRawFiFoEmpty (TerminalDevice)) {\r
    //\r
    //  FIFO is empty\r
    //\r
    *Output = 0;\r
    return FALSE;\r
  }\r
\r
  *Output                       = TerminalDevice->RawFiFo->Data[Head];\r
\r
  TerminalDevice->RawFiFo->Head  = (UINT8) ((Head + 1) % (RAW_FIFO_MAX_NUMBER + 1));\r
\r
  return TRUE;\r
}\r
\r
/**\r
  Clarify whether Raw Data FIFO buffer is empty.\r
\r
  @param  TerminalDevice       Terminal driver private structure\r
\r
  @retval TRUE                 If Raw Data FIFO buffer is empty.\r
  @retval FLASE                If Raw Data FIFO buffer is not empty.\r
\r
**/\r
BOOLEAN\r
IsRawFiFoEmpty (\r
  TERMINAL_DEV  *TerminalDevice\r
  )\r
{\r
  if (TerminalDevice->RawFiFo->Head == TerminalDevice->RawFiFo->Tail) {\r
    return TRUE;\r
  } else {\r
    return FALSE;\r
  }\r
}\r
\r
/**\r
  Clarify whether Raw Data FIFO buffer is full.\r
\r
  @param  TerminalDevice       Terminal driver private structure\r
\r
  @retval TRUE                 If Raw Data FIFO buffer is full.\r
  @retval FLASE                If Raw Data FIFO buffer is not full.\r
\r
**/\r
BOOLEAN\r
IsRawFiFoFull (\r
  TERMINAL_DEV  *TerminalDevice\r
  )\r
{\r
  UINT8 Tail;\r
  UINT8 Head;\r
\r
  Tail  = TerminalDevice->RawFiFo->Tail;\r
  Head  = TerminalDevice->RawFiFo->Head;\r
\r
  if (((Tail + 1) % (RAW_FIFO_MAX_NUMBER + 1)) == Head) {\r
\r
    return TRUE;\r
  }\r
\r
  return FALSE;\r
}\r
\r
/**\r
  Insert one pre-fetched key into the FIFO buffer.\r
\r
  @param  TerminalDevice       Terminal driver private structure.\r
  @param  Key                  The key will be input.\r
\r
  @retval TRUE                 If insert successfully.\r
  @retval FLASE                If FIFO buffer is full before key insertion,\r
                               and the key is lost.\r
\r
**/\r
BOOLEAN\r
EfiKeyFiFoInsertOneKey (\r
  TERMINAL_DEV      *TerminalDevice,\r
  EFI_INPUT_KEY     Key\r
  )\r
{\r
  UINT8 Tail;\r
\r
  Tail = TerminalDevice->EfiKeyFiFo->Tail;\r
  ASSERT (Tail < FIFO_MAX_NUMBER + 1);\r
\r
  if (IsEfiKeyFiFoFull (TerminalDevice)) {\r
    //\r
    // Efi Key FIFO is full\r
    //\r
    return FALSE;\r
  }\r
\r
  TerminalDevice->EfiKeyFiFo->Data[Tail] = Key;\r
\r
  TerminalDevice->EfiKeyFiFo->Tail       = (UINT8) ((Tail + 1) % (FIFO_MAX_NUMBER + 1));\r
\r
  return TRUE;\r
}\r
\r
/**\r
  Remove one pre-fetched key out of the FIFO buffer.\r
\r
  @param  TerminalDevice       Terminal driver private structure.\r
  @param  Output               The key will be removed.\r
\r
  @retval TRUE                 If insert successfully.\r
  @retval FLASE                If FIFO buffer is empty before remove operation.\r
\r
**/\r
BOOLEAN\r
EfiKeyFiFoRemoveOneKey (\r
  TERMINAL_DEV  *TerminalDevice,\r
  EFI_INPUT_KEY *Output\r
  )\r
{\r
  UINT8 Head;\r
\r
  Head = TerminalDevice->EfiKeyFiFo->Head;\r
  ASSERT (Head < FIFO_MAX_NUMBER + 1);\r
\r
  if (IsEfiKeyFiFoEmpty (TerminalDevice)) {\r
    //\r
    //  FIFO is empty\r
    //\r
    Output->ScanCode    = SCAN_NULL;\r
    Output->UnicodeChar = 0;\r
    return FALSE;\r
  }\r
\r
  *Output                         = TerminalDevice->EfiKeyFiFo->Data[Head];\r
\r
  TerminalDevice->EfiKeyFiFo->Head = (UINT8) ((Head + 1) % (FIFO_MAX_NUMBER + 1));\r
\r
  return TRUE;\r
}\r
\r
/**\r
  Clarify whether FIFO buffer is empty.\r
\r
  @param  TerminalDevice       Terminal driver private structure\r
\r
  @retval TRUE                 If FIFO buffer is empty.\r
  @retval FLASE                If FIFO buffer is not empty.\r
\r
**/\r
BOOLEAN\r
IsEfiKeyFiFoEmpty (\r
  TERMINAL_DEV  *TerminalDevice\r
  )\r
{\r
  if (TerminalDevice->EfiKeyFiFo->Head == TerminalDevice->EfiKeyFiFo->Tail) {\r
    return TRUE;\r
  } else {\r
    return FALSE;\r
  }\r
}\r
\r
/**\r
  Clarify whether FIFO buffer is full.\r
\r
  @param  TerminalDevice       Terminal driver private structure\r
\r
  @retval TRUE                 If FIFO buffer is full.\r
  @retval FLASE                If FIFO buffer is not full.\r
\r
**/\r
BOOLEAN\r
IsEfiKeyFiFoFull (\r
  TERMINAL_DEV  *TerminalDevice\r
  )\r
{\r
  UINT8 Tail;\r
  UINT8 Head;\r
\r
  Tail  = TerminalDevice->EfiKeyFiFo->Tail;\r
  Head  = TerminalDevice->EfiKeyFiFo->Head;\r
\r
  if (((Tail + 1) % (FIFO_MAX_NUMBER + 1)) == Head) {\r
\r
    return TRUE;\r
  }\r
\r
  return FALSE;\r
}\r
\r
/**\r
  Insert one pre-fetched key into the Unicode FIFO buffer.\r
\r
  @param  TerminalDevice       Terminal driver private structure.\r
  @param  Input                The key will be input.\r
\r
  @retval TRUE                 If insert successfully.\r
  @retval FLASE                If Unicode FIFO buffer is full before key insertion,\r
                               and the key is lost.\r
\r
**/\r
BOOLEAN\r
UnicodeFiFoInsertOneKey (\r
  TERMINAL_DEV      *TerminalDevice,\r
  UINT16            Input\r
  )\r
{\r
  UINT8 Tail;\r
\r
  Tail = TerminalDevice->UnicodeFiFo->Tail;\r
  ASSERT (Tail < FIFO_MAX_NUMBER + 1);\r
\r
\r
  if (IsUnicodeFiFoFull (TerminalDevice)) {\r
    //\r
    // Unicode FIFO is full\r
    //\r
    return FALSE;\r
  }\r
\r
  TerminalDevice->UnicodeFiFo->Data[Tail]  = Input;\r
\r
  TerminalDevice->UnicodeFiFo->Tail        = (UINT8) ((Tail + 1) % (FIFO_MAX_NUMBER + 1));\r
\r
  return TRUE;\r
}\r
\r
/**\r
  Remove one pre-fetched key out of the Unicode FIFO buffer.\r
\r
  @param  TerminalDevice       Terminal driver private structure.\r
  @param  Output               The key will be removed.\r
\r
  @retval TRUE                 If insert successfully.\r
  @retval FLASE                If Unicode FIFO buffer is empty before remove operation.\r
\r
**/\r
BOOLEAN\r
UnicodeFiFoRemoveOneKey (\r
  TERMINAL_DEV  *TerminalDevice,\r
  UINT16        *Output\r
  )\r
{\r
  UINT8 Head;\r
\r
  Head = TerminalDevice->UnicodeFiFo->Head;\r
  ASSERT (Head < FIFO_MAX_NUMBER + 1);\r
\r
  if (IsUnicodeFiFoEmpty (TerminalDevice)) {\r
    //\r
    //  FIFO is empty\r
    //\r
    Output = NULL;\r
    return FALSE;\r
  }\r
\r
  *Output = TerminalDevice->UnicodeFiFo->Data[Head];\r
\r
  TerminalDevice->UnicodeFiFo->Head = (UINT8) ((Head + 1) % (FIFO_MAX_NUMBER + 1));\r
\r
  return TRUE;\r
}\r
\r
/**\r
  Clarify whether Unicode FIFO buffer is empty.\r
\r
  @param  TerminalDevice       Terminal driver private structure\r
\r
  @retval TRUE                 If Unicode FIFO buffer is empty.\r
  @retval FLASE                If Unicode FIFO buffer is not empty.\r
\r
**/\r
BOOLEAN\r
IsUnicodeFiFoEmpty (\r
  TERMINAL_DEV  *TerminalDevice\r
  )\r
{\r
  if (TerminalDevice->UnicodeFiFo->Head == TerminalDevice->UnicodeFiFo->Tail) {\r
    return TRUE;\r
  } else {\r
    return FALSE;\r
  }\r
}\r
\r
/**\r
  Clarify whether Unicode FIFO buffer is full.\r
\r
  @param  TerminalDevice       Terminal driver private structure\r
\r
  @retval TRUE                 If Unicode FIFO buffer is full.\r
  @retval FLASE                If Unicode FIFO buffer is not full.\r
\r
**/\r
BOOLEAN\r
IsUnicodeFiFoFull (\r
  TERMINAL_DEV  *TerminalDevice\r
  )\r
{\r
  UINT8 Tail;\r
  UINT8 Head;\r
\r
  Tail  = TerminalDevice->UnicodeFiFo->Tail;\r
  Head  = TerminalDevice->UnicodeFiFo->Head;\r
\r
  if (((Tail + 1) % (FIFO_MAX_NUMBER + 1)) == Head) {\r
\r
    return TRUE;\r
  }\r
\r
  return FALSE;\r
}\r
\r
/**\r
  Count Unicode FIFO buffer.\r
\r
  @param  TerminalDevice       Terminal driver private structure\r
\r
  @return The count in bytes of Unicode FIFO.\r
\r
**/\r
UINT8\r
UnicodeFiFoGetKeyCount (\r
  TERMINAL_DEV    *TerminalDevice\r
  )\r
{\r
  UINT8 Tail;\r
  UINT8 Head;\r
\r
  Tail  = TerminalDevice->UnicodeFiFo->Tail;\r
  Head  = TerminalDevice->UnicodeFiFo->Head;\r
\r
  if (Tail >= Head) {\r
    return (UINT8) (Tail - Head);\r
  } else {\r
    return (UINT8) (Tail + FIFO_MAX_NUMBER + 1 - Head);\r
  }\r
}\r
\r
/**\r
  Update the Unicode characters from a terminal input device into EFI Keys FIFO.\r
\r
  @param TerminalDevice   The terminal device to use to translate raw input into EFI Keys\r
\r
**/\r
VOID\r
UnicodeToEfiKeyFlushState (\r
  IN  TERMINAL_DEV    *TerminalDevice\r
  )\r
{\r
  EFI_INPUT_KEY Key;\r
  UINT32        InputState;\r
\r
  InputState = TerminalDevice->InputState;\r
\r
  if ((InputState & INPUT_STATE_ESC) != 0) {\r
    Key.ScanCode    = SCAN_ESC;\r
    Key.UnicodeChar = 0;\r
    EfiKeyFiFoInsertOneKey (TerminalDevice, Key);\r
  }\r
\r
  if ((InputState & INPUT_STATE_CSI) != 0) {\r
    Key.ScanCode    = SCAN_NULL;\r
    Key.UnicodeChar = CSI;\r
    EfiKeyFiFoInsertOneKey (TerminalDevice, Key);\r
  }\r
\r
  if ((InputState & INPUT_STATE_LEFTOPENBRACKET) != 0) {\r
    Key.ScanCode    = SCAN_NULL;\r
    Key.UnicodeChar = LEFTOPENBRACKET;\r
    EfiKeyFiFoInsertOneKey (TerminalDevice, Key);\r
  }\r
\r
  if ((InputState & INPUT_STATE_O) != 0) {\r
    Key.ScanCode    = SCAN_NULL;\r
    Key.UnicodeChar = 'O';\r
    EfiKeyFiFoInsertOneKey (TerminalDevice, Key);\r
  }\r
\r
  if ((InputState & INPUT_STATE_2) != 0) {\r
    Key.ScanCode    = SCAN_NULL;\r
    Key.UnicodeChar = '2';\r
    EfiKeyFiFoInsertOneKey (TerminalDevice, Key);\r
  }\r
\r
  //\r
  // Cancel the timer.\r
  //\r
  gBS->SetTimer (\r
        TerminalDevice->TwoSecondTimeOut,\r
        TimerCancel,\r
        0\r
        );\r
\r
  TerminalDevice->InputState = INPUT_STATE_DEFAULT;\r
}\r
\r
\r
/**\r
  Converts a stream of Unicode characters from a terminal input device into EFI Keys that\r
  can be read through the Simple Input Protocol.\r
\r
  The table below shows the keyboard input mappings that this function supports.\r
  If the ESC sequence listed in one of the columns is presented, then it is translated\r
  into the corresponding EFI Scan Code.  If a matching sequence is not found, then the raw\r
  key strokes are converted into EFI Keys.\r
\r
  2 seconds are allowed for an ESC sequence to be completed.  If the ESC sequence is not\r
  completed in 2 seconds, then the raw key strokes of the partial ESC sequence are\r
  converted into EFI Keys.\r
  There is one special input sequence that will force the system to reset.\r
  This is ESC R ESC r ESC R.\r
\r
  Symbols used in table below\r
  ===========================\r
    ESC = 0x1B\r
    CSI = 0x9B\r
    DEL = 0x7f\r
    ^   = CTRL\r
\r
  +=========+======+===========+==========+==========+\r
  |         | EFI  | UEFI 2.0  |          |          |\r
  |         | Scan |           |  VT100+  |          |\r
  |   KEY   | Code |  PC ANSI  |  VTUTF8  |   VT100  |\r
  +=========+======+===========+==========+==========+\r
  | NULL    | 0x00 |           |          |          |\r
  | UP      | 0x01 | ESC [ A   | ESC [ A  | ESC [ A  |\r
  | DOWN    | 0x02 | ESC [ B   | ESC [ B  | ESC [ B  |\r
  | RIGHT   | 0x03 | ESC [ C   | ESC [ C  | ESC [ C  |\r
  | LEFT    | 0x04 | ESC [ D   | ESC [ D  | ESC [ D  |\r
  | HOME    | 0x05 | ESC [ H   | ESC h    | ESC [ H  |\r
  | END     | 0x06 | ESC [ F   | ESC k    | ESC [ K  |\r
  | INSERT  | 0x07 | ESC [ @   | ESC +    | ESC [ @  |\r
  |         |      | ESC [ L   |          | ESC [ L  |\r
  | DELETE  | 0x08 | ESC [ X   | ESC -    | ESC [ P  |\r
  | PG UP   | 0x09 | ESC [ I   | ESC ?    | ESC [ V  |\r
  |         |      |           |          | ESC [ ?  |\r
  | PG DOWN | 0x0A | ESC [ G   | ESC /    | ESC [ U  |\r
  |         |      |           |          | ESC [ /  |\r
  | F1      | 0x0B | ESC [ M   | ESC 1    | ESC O P  |\r
  | F2      | 0x0C | ESC [ N   | ESC 2    | ESC O Q  |\r
  | F3      | 0x0D | ESC [ O   | ESC 3    | ESC O w  |\r
  | F4      | 0x0E | ESC [ P   | ESC 4    | ESC O x  |\r
  | F5      | 0x0F | ESC [ Q   | ESC 5    | ESC O t  |\r
  | F6      | 0x10 | ESC [ R   | ESC 6    | ESC O u  |\r
  | F7      | 0x11 | ESC [ S   | ESC 7    | ESC O q  |\r
  | F8      | 0x12 | ESC [ T   | ESC 8    | ESC O r  |\r
  | F9      | 0x13 | ESC [ U   | ESC 9    | ESC O p  |\r
  | F10     | 0x14 | ESC [ V   | ESC 0    | ESC O M  |\r
  | Escape  | 0x17 | ESC       | ESC      | ESC      |\r
  | F11     | 0x15 |           | ESC !    |          |\r
  | F12     | 0x16 |           | ESC @    |          |\r
  +=========+======+===========+==========+==========+\r
\r
  Special Mappings\r
  ================\r
  ESC R ESC r ESC R = Reset System\r
\r
  @param TerminalDevice   The terminal device to use to translate raw input into EFI Keys\r
\r
**/\r
VOID\r
UnicodeToEfiKey (\r
  IN  TERMINAL_DEV    *TerminalDevice\r
  )\r
{\r
  EFI_STATUS          Status;\r
  EFI_STATUS          TimerStatus;\r
  UINT16              UnicodeChar;\r
  EFI_INPUT_KEY       Key;\r
  BOOLEAN             SetDefaultResetState;\r
\r
  TimerStatus = gBS->CheckEvent (TerminalDevice->TwoSecondTimeOut);\r
\r
  if (!EFI_ERROR (TimerStatus)) {\r
    UnicodeToEfiKeyFlushState (TerminalDevice);\r
    TerminalDevice->ResetState = RESET_STATE_DEFAULT;\r
  }\r
\r
  while (!IsUnicodeFiFoEmpty(TerminalDevice)) {\r
\r
    if (TerminalDevice->InputState != INPUT_STATE_DEFAULT) {\r
      //\r
      // Check to see if the 2 seconds timer has expired\r
      //\r
      TimerStatus = gBS->CheckEvent (TerminalDevice->TwoSecondTimeOut);\r
      if (!EFI_ERROR (TimerStatus)) {\r
        UnicodeToEfiKeyFlushState (TerminalDevice);\r
        TerminalDevice->ResetState = RESET_STATE_DEFAULT;\r
      }\r
    }\r
\r
    //\r
    // Fetch one Unicode character from the Unicode FIFO\r
    //\r
    UnicodeFiFoRemoveOneKey (TerminalDevice, &UnicodeChar);\r
\r
    SetDefaultResetState = TRUE;\r
\r
    switch (TerminalDevice->InputState) {\r
    case INPUT_STATE_DEFAULT:\r
\r
      break;\r
\r
    case INPUT_STATE_ESC:\r
\r
      if (UnicodeChar == LEFTOPENBRACKET) {\r
        TerminalDevice->InputState |= INPUT_STATE_LEFTOPENBRACKET;\r
        TerminalDevice->ResetState = RESET_STATE_DEFAULT;\r
        continue;\r
      }\r
\r
      if (UnicodeChar == 'O' && TerminalDevice->TerminalType == VT100TYPE) {\r
        TerminalDevice->InputState |= INPUT_STATE_O;\r
        TerminalDevice->ResetState = RESET_STATE_DEFAULT;\r
        continue;\r
      }\r
\r
      Key.ScanCode = SCAN_NULL;\r
\r
      if (TerminalDevice->TerminalType == VT100PLUSTYPE ||\r
          TerminalDevice->TerminalType == VTUTF8TYPE) {\r
        switch (UnicodeChar) {\r
        case '1':\r
          Key.ScanCode = SCAN_F1;\r
          break;\r
        case '2':\r
          Key.ScanCode = SCAN_F2;\r
          break;\r
        case '3':\r
          Key.ScanCode = SCAN_F3;\r
          break;\r
        case '4':\r
          Key.ScanCode = SCAN_F4;\r
          break;\r
        case '5':\r
          Key.ScanCode = SCAN_F5;\r
          break;\r
        case '6':\r
          Key.ScanCode = SCAN_F6;\r
          break;\r
        case '7':\r
          Key.ScanCode = SCAN_F7;\r
          break;\r
        case '8':\r
          Key.ScanCode = SCAN_F8;\r
          break;\r
        case '9':\r
          Key.ScanCode = SCAN_F9;\r
          break;\r
        case '0':\r
          Key.ScanCode = SCAN_F10;\r
          break;\r
        case '!':\r
          Key.ScanCode = SCAN_F11;\r
          break;\r
        case '@':\r
          Key.ScanCode = SCAN_F12;\r
          break;\r
        case 'h':\r
          Key.ScanCode = SCAN_HOME;\r
          break;\r
        case 'k':\r
          Key.ScanCode = SCAN_END;\r
          break;\r
        case '+':\r
          Key.ScanCode = SCAN_INSERT;\r
          break;\r
        case '-':\r
          Key.ScanCode = SCAN_DELETE;\r
          break;\r
        case '/':\r
          Key.ScanCode = SCAN_PAGE_DOWN;\r
          break;\r
        case '?':\r
          Key.ScanCode = SCAN_PAGE_UP;\r
          break;\r
        default :\r
          break;\r
        }\r
      }\r
\r
      switch (UnicodeChar) {\r
      case 'R':\r
        if (TerminalDevice->ResetState == RESET_STATE_DEFAULT) {\r
          TerminalDevice->ResetState = RESET_STATE_ESC_R;\r
          SetDefaultResetState = FALSE;\r
        } else if (TerminalDevice->ResetState == RESET_STATE_ESC_R_ESC_r) {\r
          gRT->ResetSystem (EfiResetWarm, EFI_SUCCESS, 0, NULL);\r
        }\r
        Key.ScanCode = SCAN_NULL;\r
        break;\r
      case 'r':\r
        if (TerminalDevice->ResetState == RESET_STATE_ESC_R) {\r
          TerminalDevice->ResetState = RESET_STATE_ESC_R_ESC_r;\r
          SetDefaultResetState = FALSE;\r
        }\r
        Key.ScanCode = SCAN_NULL;\r
        break;\r
      default :\r
        break;\r
      }\r
\r
      if (SetDefaultResetState) {\r
        TerminalDevice->ResetState = RESET_STATE_DEFAULT;\r
      }\r
\r
      if (Key.ScanCode != SCAN_NULL) {\r
        Key.UnicodeChar = 0;\r
        EfiKeyFiFoInsertOneKey (TerminalDevice,Key);\r
        TerminalDevice->InputState = INPUT_STATE_DEFAULT;\r
        UnicodeToEfiKeyFlushState (TerminalDevice);\r
        continue;\r
      }\r
\r
      UnicodeToEfiKeyFlushState (TerminalDevice);\r
\r
      break;\r
\r
    case INPUT_STATE_ESC | INPUT_STATE_O:\r
\r
      TerminalDevice->ResetState = RESET_STATE_DEFAULT;\r
\r
      Key.ScanCode = SCAN_NULL;\r
\r
      if (TerminalDevice->TerminalType == VT100TYPE) {\r
        switch (UnicodeChar) {\r
        case 'P':\r
          Key.ScanCode = SCAN_F1;\r
          break;\r
        case 'Q':\r
          Key.ScanCode = SCAN_F2;\r
          break;\r
        case 'w':\r
          Key.ScanCode = SCAN_F3;\r
          break;\r
        case 'x':\r
          Key.ScanCode = SCAN_F4;\r
          break;\r
        case 't':\r
          Key.ScanCode = SCAN_F5;\r
          break;\r
        case 'u':\r
          Key.ScanCode = SCAN_F6;\r
          break;\r
        case 'q':\r
          Key.ScanCode = SCAN_F7;\r
          break;\r
        case 'r':\r
          Key.ScanCode = SCAN_F8;\r
          break;\r
        case 'p':\r
          Key.ScanCode = SCAN_F9;\r
          break;\r
        case 'M':\r
          Key.ScanCode = SCAN_F10;\r
          break;\r
        default :\r
          break;\r
        }\r
      }\r
\r
      if (Key.ScanCode != SCAN_NULL) {\r
        Key.UnicodeChar = 0;\r
        EfiKeyFiFoInsertOneKey (TerminalDevice,Key);\r
        TerminalDevice->InputState = INPUT_STATE_DEFAULT;\r
        UnicodeToEfiKeyFlushState (TerminalDevice);\r
        continue;\r
      }\r
\r
      UnicodeToEfiKeyFlushState (TerminalDevice);\r
\r
      break;\r
\r
    case INPUT_STATE_ESC | INPUT_STATE_LEFTOPENBRACKET:\r
\r
      TerminalDevice->ResetState = RESET_STATE_DEFAULT;\r
\r
      Key.ScanCode = SCAN_NULL;\r
\r
      if (TerminalDevice->TerminalType == PCANSITYPE    ||\r
          TerminalDevice->TerminalType == VT100TYPE     ||\r
          TerminalDevice->TerminalType == VT100PLUSTYPE ||\r
          TerminalDevice->TerminalType == VTUTF8TYPE) {\r
        switch (UnicodeChar) {\r
        case 'A':\r
          Key.ScanCode = SCAN_UP;\r
          break;\r
        case 'B':\r
          Key.ScanCode = SCAN_DOWN;\r
          break;\r
        case 'C':\r
          Key.ScanCode = SCAN_RIGHT;\r
          break;\r
        case 'D':\r
          Key.ScanCode = SCAN_LEFT;\r
          break;\r
        case 'H':\r
          if (TerminalDevice->TerminalType == PCANSITYPE ||\r
              TerminalDevice->TerminalType == VT100TYPE) {\r
            Key.ScanCode = SCAN_HOME;\r
          }\r
          break;\r
        case 'F':\r
          if (TerminalDevice->TerminalType == PCANSITYPE) {\r
            Key.ScanCode = SCAN_END;\r
          }\r
          break;\r
        case 'K':\r
          if (TerminalDevice->TerminalType == VT100TYPE) {\r
            Key.ScanCode = SCAN_END;\r
          }\r
          break;\r
        case 'L':\r
        case '@':\r
          if (TerminalDevice->TerminalType == PCANSITYPE ||\r
              TerminalDevice->TerminalType == VT100TYPE) {\r
            Key.ScanCode = SCAN_INSERT;\r
          }\r
          break;\r
        case 'X':\r
          if (TerminalDevice->TerminalType == PCANSITYPE) {\r
            Key.ScanCode = SCAN_DELETE;\r
          }\r
          break;\r
        case 'P':\r
          if (TerminalDevice->TerminalType == VT100TYPE) {\r
            Key.ScanCode = SCAN_DELETE;\r
          } else if (TerminalDevice->TerminalType == PCANSITYPE) {\r
            Key.ScanCode = SCAN_F4;\r
          }\r
          break;\r
        case 'I':\r
          if (TerminalDevice->TerminalType == PCANSITYPE) {\r
            Key.ScanCode = SCAN_PAGE_UP;\r
          }\r
          break;\r
        case 'V':\r
          if (TerminalDevice->TerminalType == PCANSITYPE) {\r
            Key.ScanCode = SCAN_F10;\r
          }\r
        case '?':\r
          if (TerminalDevice->TerminalType == VT100TYPE) {\r
            Key.ScanCode = SCAN_PAGE_UP;\r
          }\r
          break;\r
        case 'G':\r
          if (TerminalDevice->TerminalType == PCANSITYPE) {\r
            Key.ScanCode = SCAN_PAGE_DOWN;\r
          }\r
          break;\r
        case 'U':\r
          if (TerminalDevice->TerminalType == PCANSITYPE) {\r
            Key.ScanCode = SCAN_F9;\r
          }\r
        case '/':\r
          if (TerminalDevice->TerminalType == VT100TYPE) {\r
            Key.ScanCode = SCAN_PAGE_DOWN;\r
          }\r
          break;\r
        case 'M':\r
          if (TerminalDevice->TerminalType == PCANSITYPE) {\r
            Key.ScanCode = SCAN_F1;\r
          }\r
          break;\r
        case 'N':\r
          if (TerminalDevice->TerminalType == PCANSITYPE) {\r
            Key.ScanCode = SCAN_F2;\r
          }\r
          break;\r
        case 'O':\r
          if (TerminalDevice->TerminalType == PCANSITYPE) {\r
            Key.ScanCode = SCAN_F3;\r
          }\r
          break;\r
        case 'Q':\r
          if (TerminalDevice->TerminalType == PCANSITYPE) {\r
            Key.ScanCode = SCAN_F5;\r
          }\r
          break;\r
        case 'R':\r
          if (TerminalDevice->TerminalType == PCANSITYPE) {\r
            Key.ScanCode = SCAN_F6;\r
          }\r
          break;\r
        case 'S':\r
          if (TerminalDevice->TerminalType == PCANSITYPE) {\r
            Key.ScanCode = SCAN_F7;\r
          }\r
          break;\r
        case 'T':\r
          if (TerminalDevice->TerminalType == PCANSITYPE) {\r
            Key.ScanCode = SCAN_F8;\r
          }\r
          break;\r
        default :\r
          break;\r
        }\r
      }\r
\r
      if (Key.ScanCode != SCAN_NULL) {\r
        Key.UnicodeChar = 0;\r
        EfiKeyFiFoInsertOneKey (TerminalDevice,Key);\r
        TerminalDevice->InputState = INPUT_STATE_DEFAULT;\r
        UnicodeToEfiKeyFlushState (TerminalDevice);\r
        continue;\r
      }\r
\r
      UnicodeToEfiKeyFlushState (TerminalDevice);\r
\r
      break;\r
\r
\r
    default:\r
      //\r
      // Invalid state. This should never happen.\r
      //\r
      ASSERT (FALSE);\r
\r
      UnicodeToEfiKeyFlushState (TerminalDevice);\r
\r
      break;\r
    }\r
\r
    if (UnicodeChar == ESC) {\r
      TerminalDevice->InputState = INPUT_STATE_ESC;\r
    }\r
\r
    if (UnicodeChar == CSI) {\r
      TerminalDevice->InputState = INPUT_STATE_CSI;\r
    }\r
\r
    if (TerminalDevice->InputState != INPUT_STATE_DEFAULT) {\r
      Status = gBS->SetTimer(\r
                      TerminalDevice->TwoSecondTimeOut,\r
                      TimerRelative,\r
                      (UINT64)20000000\r
                      );\r
      ASSERT_EFI_ERROR (Status);\r
      continue;\r
    }\r
\r
    if (SetDefaultResetState) {\r
      TerminalDevice->ResetState = RESET_STATE_DEFAULT;\r
    }\r
\r
    if (UnicodeChar == DEL) {\r
      Key.ScanCode    = SCAN_DELETE;\r
      Key.UnicodeChar = 0;\r
    } else {\r
      Key.ScanCode    = SCAN_NULL;\r
      Key.UnicodeChar = UnicodeChar;\r
    }\r
\r
    EfiKeyFiFoInsertOneKey (TerminalDevice,Key);\r
  }\r
}\r