Exemple #1
0
/**
  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  TerminalDevice           Terminal driver private structure
  @param  KeyData                  A pointer to a buffer that is filled in with the
                                   keystroke state data 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.
  @retval EFI_INVALID_PARAMETER    KeyData is NULL.

**/
EFI_STATUS
ReadKeyStrokeWorker (
  IN  TERMINAL_DEV *TerminalDevice,
  OUT EFI_KEY_DATA *KeyData
  )
{
  EFI_STATUS                      Status;
  LIST_ENTRY                      *Link;
  LIST_ENTRY                      *NotifyList;
  TERMINAL_CONSOLE_IN_EX_NOTIFY   *CurrentNotify;

  if (KeyData == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  //
  // Initialize *Key to nonsense value.
  //
  KeyData->Key.ScanCode    = SCAN_NULL;
  KeyData->Key.UnicodeChar = 0;

  Status = TerminalConInCheckForKey (&TerminalDevice->SimpleInput);
  if (EFI_ERROR (Status)) {
    return EFI_NOT_READY;
  }

  if (!EfiKeyFiFoRemoveOneKey (TerminalDevice, &KeyData->Key)) {
    return EFI_NOT_READY;
  }

  KeyData->KeyState.KeyShiftState  = 0;
  KeyData->KeyState.KeyToggleState = 0;

  //
  // Invoke notification functions if exist
  //
  NotifyList = &TerminalDevice->NotifyList;
  for (Link = GetFirstNode (NotifyList); !IsNull (NotifyList,Link); Link = GetNextNode (NotifyList,Link)) {
    CurrentNotify = CR (
                      Link,
                      TERMINAL_CONSOLE_IN_EX_NOTIFY,
                      NotifyEntry,
                      TERMINAL_CONSOLE_IN_EX_NOTIFY_SIGNATURE
                      );
    if (IsKeyRegistered (&CurrentNotify->KeyData, KeyData)) {
      CurrentNotify->KeyNotificationFn (KeyData);
    }
  }

  return EFI_SUCCESS;

}
Exemple #2
0
/**
  Insert one pre-fetched key into the FIFO buffer.

  @param  TerminalDevice       Terminal driver private structure.
  @param  Key                  The key will be input.

  @retval TRUE                 If insert successfully.
  @retval FLASE                If FIFO buffer is full before key insertion,
                               and the key is lost.

**/
BOOLEAN
EfiKeyFiFoInsertOneKey (
  TERMINAL_DEV                    *TerminalDevice,
  EFI_INPUT_KEY                   *Key
  )
{
  UINT8                           Tail;
  LIST_ENTRY                      *Link;
  LIST_ENTRY                      *NotifyList;
  TERMINAL_CONSOLE_IN_EX_NOTIFY   *CurrentNotify;
  EFI_KEY_DATA                    KeyData;

  Tail = TerminalDevice->EfiKeyFiFo->Tail;

  CopyMem (&KeyData.Key, Key, sizeof (EFI_INPUT_KEY));
  KeyData.KeyState.KeyShiftState  = 0;
  KeyData.KeyState.KeyToggleState = 0;

  //
  // Invoke notification functions if exist
  //
  NotifyList = &TerminalDevice->NotifyList;
  for (Link = GetFirstNode (NotifyList); !IsNull (NotifyList,Link); Link = GetNextNode (NotifyList,Link)) {
    CurrentNotify = CR (
                      Link,
                      TERMINAL_CONSOLE_IN_EX_NOTIFY,
                      NotifyEntry,
                      TERMINAL_CONSOLE_IN_EX_NOTIFY_SIGNATURE
                      );
    if (IsKeyRegistered (&CurrentNotify->KeyData, &KeyData)) {
      CurrentNotify->KeyNotificationFn (&KeyData);
    }
  }
  if (IsEfiKeyFiFoFull (TerminalDevice)) {
    //
    // Efi Key FIFO is full
    //
    return FALSE;
  }

  CopyMem (&TerminalDevice->EfiKeyFiFo->Data[Tail], Key, sizeof (EFI_INPUT_KEY));

  TerminalDevice->EfiKeyFiFo->Tail = (UINT8) ((Tail + 1) % (FIFO_MAX_NUMBER + 1));

  return TRUE;
}