/** @file
  A faked PS/2 Absolute Pointer driver. Routines that interacts with callers,
  conforming to EFI driver model

Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "Ps2MouseAbsolutePointer.h"
#include "CommPs2.h"

//
// DriverBinding Protocol Instance
//
EFI_DRIVER_BINDING_PROTOCOL gPS2MouseAbsolutePointerDriver = {
  PS2MouseAbsolutePointerDriverSupported,
  PS2MouseAbsolutePointerDriverStart,
  PS2MouseAbsolutePointerDriverStop,
  0x1,
  NULL,
  NULL
};

/**
  Test to see if this driver supports ControllerHandle. Any ControllerHandle
  than contains a IsaIo protocol can be supported.

  @param  This                Protocol instance pointer.
  @param  ControllerHandle    Handle of device to test
  @param  RemainingDevicePath Optional parameter use to pick a specific child
                              device to start.

  @retval EFI_SUCCESS         This driver supports this device
  @retval EFI_ALREADY_STARTED This driver is already running on this device
  @retval other               This driver does not support this device

**/
EFI_STATUS
EFIAPI
PS2MouseAbsolutePointerDriverSupported (
  IN EFI_DRIVER_BINDING_PROTOCOL    *This,
  IN EFI_HANDLE                     Controller,
  IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
  )
{
  EFI_STATUS                          Status;
  EFI_ISA_IO_PROTOCOL                 *IsaIo;

  Status = EFI_SUCCESS;

  //
  // Open the IO Abstraction(s) needed to perform the supported test
  //
  Status = gBS->OpenProtocol (
                  Controller,
                  &gEfiIsaIoProtocolGuid,
                  (VOID **) &IsaIo,
                  This->DriverBindingHandle,
                  Controller,
                  EFI_OPEN_PROTOCOL_BY_DRIVER
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }
  //
  // Use the ISA I/O Protocol to see if Controller is the Mouse controller
  //
  switch (IsaIo->ResourceList->Device.HID) {
  case EISA_PNP_ID (0xF03):
  //
  // Microsoft PS/2 style mouse
  //
  case EISA_PNP_ID (0xF13):
    //
    // PS/2 Port for PS/2-style Mice
    //
    break;

  case EISA_PNP_ID (0x303):
    //
    // IBM Enhanced (101/102-key, PS/2 mouse support)
    //
    if (IsaIo->ResourceList->Device.UID == 1) {
      break;
    }

  default:
    Status = EFI_UNSUPPORTED;
    break;
  }
  //
  // Close the I/O Abstraction(s) used to perform the supported test
  //
  gBS->CloseProtocol (
         Controller,
         &gEfiIsaIoProtocolGuid,
         This->DriverBindingHandle,
         Controller
         );

  return Status;
}

/**
  Start this driver on ControllerHandle by opening a IsaIo protocol, creating
  PS2_MOUSE_ABSOLUTE_POINTER_DEV device and install gEfiAbsolutePointerProtocolGuid
  finally.

  @param  This                 Protocol instance pointer.
  @param  ControllerHandle     Handle of device to bind driver to
  @param  RemainingDevicePath  Optional parameter use to pick a specific child
                               device to start.

  @retval EFI_SUCCESS          This driver is added to ControllerHandle
  @retval EFI_ALREADY_STARTED  This driver is already running on ControllerHandle
  @retval other                This driver does not support this device

**/
EFI_STATUS
EFIAPI
PS2MouseAbsolutePointerDriverStart (
  IN EFI_DRIVER_BINDING_PROTOCOL    *This,
  IN EFI_HANDLE                     Controller,
  IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
  )
{
  EFI_STATUS                          Status;
  EFI_STATUS                          EmptyStatus;
  EFI_ISA_IO_PROTOCOL                 *IsaIo;
  PS2_MOUSE_ABSOLUTE_POINTER_DEV     *MouseAbsolutePointerDev;
  UINT8                               Data;
  EFI_TPL                             OldTpl;
  EFI_STATUS_CODE_VALUE               StatusCode;
  EFI_DEVICE_PATH_PROTOCOL            *ParentDevicePath;

  StatusCode  = 0;
  MouseAbsolutePointerDev    = NULL;
  IsaIo       = NULL;

  //
  // Open the device path protocol
  //
  Status = gBS->OpenProtocol (
                  Controller,
                  &gEfiDevicePathProtocolGuid,
                  (VOID **) &ParentDevicePath,
                  This->DriverBindingHandle,
                  Controller,
                  EFI_OPEN_PROTOCOL_BY_DRIVER
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }
  //
  // Report that the keyboard is being enabled
  //
  REPORT_STATUS_CODE_WITH_DEVICE_PATH (
    EFI_PROGRESS_CODE,
    EFI_PERIPHERAL_MOUSE | EFI_P_PC_ENABLE,
    ParentDevicePath
    );

  //
  // Get the ISA I/O Protocol on Controller's handle
  //
  Status = gBS->OpenProtocol (
                  Controller,
                  &gEfiIsaIoProtocolGuid,
                  (VOID **) &IsaIo,
                  This->DriverBindingHandle,
                  Controller,
                  EFI_OPEN_PROTOCOL_BY_DRIVER
                  );
  if (EFI_ERROR (Status)) {
    gBS->CloseProtocol (
           Controller,
           &gEfiDevicePathProtocolGuid,
           This->DriverBindingHandle,
           Controller
           );
    return EFI_INVALID_PARAMETER;
  }
  //
  // Raise TPL to avoid keyboard operation impact
  //
  OldTpl = gBS->RaiseTPL (TPL_NOTIFY);

  //
  // Allocate private data
  //
  MouseAbsolutePointerDev = AllocateZeroPool (sizeof (PS2_MOUSE_ABSOLUTE_POINTER_DEV));
  if (MouseAbsolutePointerDev == NULL) {
    Status = EFI_OUT_OF_RESOURCES;
    goto ErrorExit;
  }
  //
  // Setup the device instance
  //
  MouseAbsolutePointerDev->Signature       = PS2_MOUSE_ABSOLUTE_POINTER_DEV_SIGNATURE;
  MouseAbsolutePointerDev->Handle          = Controller;
  MouseAbsolutePointerDev->SampleRate      = SampleRate20;
  MouseAbsolutePointerDev->Resolution      = MouseResolution4;
  MouseAbsolutePointerDev->Scaling         = Scaling1;
  MouseAbsolutePointerDev->DataPackageSize = 3;
  MouseAbsolutePointerDev->IsaIo           = IsaIo;
  MouseAbsolutePointerDev->DevicePath      = ParentDevicePath;

  //
  // Resolution = 4 counts/mm
  //
  MouseAbsolutePointerDev->Mode.AbsoluteMaxX               = 1024;
  MouseAbsolutePointerDev->Mode.AbsoluteMinX               = 0;
  MouseAbsolutePointerDev->Mode.AbsoluteMaxY               = 798;
  MouseAbsolutePointerDev->Mode.AbsoluteMinY               = 0;
  MouseAbsolutePointerDev->Mode.AbsoluteMaxZ               = 0;
  MouseAbsolutePointerDev->Mode.AbsoluteMinZ               = 0;
  MouseAbsolutePointerDev->Mode.Attributes                 = 0x03;

  MouseAbsolutePointerDev->AbsolutePointerProtocol.Reset     = MouseAbsolutePointerReset;
  MouseAbsolutePointerDev->AbsolutePointerProtocol.GetState  = MouseAbsolutePointerGetState;
  MouseAbsolutePointerDev->AbsolutePointerProtocol.Mode      = &(MouseAbsolutePointerDev->Mode);

  //
  // Initialize keyboard controller if necessary
  //
  REPORT_STATUS_CODE_WITH_DEVICE_PATH (
    EFI_PROGRESS_CODE,
    EFI_PERIPHERAL_MOUSE | EFI_P_MOUSE_PC_SELF_TEST,
    ParentDevicePath
    );

  IsaIo->Io.Read (IsaIo, EfiIsaIoWidthUint8, KBC_CMD_STS_PORT, 1, &Data);
  if ((Data & KBC_SYSF) != KBC_SYSF) {
    Status = KbcSelfTest (IsaIo);
    if (EFI_ERROR (Status)) {
      StatusCode = EFI_PERIPHERAL_MOUSE | EFI_P_EC_CONTROLLER_ERROR;
      goto ErrorExit;
    }
  }

  KbcEnableAux (IsaIo);

  REPORT_STATUS_CODE_WITH_DEVICE_PATH (
    EFI_PROGRESS_CODE,
    EFI_PERIPHERAL_MOUSE | EFI_P_PC_PRESENCE_DETECT,
    ParentDevicePath
    );

  //
  // Reset the mouse
  //
  Status = MouseAbsolutePointerDev->AbsolutePointerProtocol.Reset (
                     &MouseAbsolutePointerDev->AbsolutePointerProtocol,
                     FeaturePcdGet (PcdPs2MouseExtendedVerification)
                     );
  if (EFI_ERROR (Status)) {
    //
    // mouse not connected
    //
    Status      = EFI_SUCCESS;
    StatusCode  = EFI_PERIPHERAL_MOUSE | EFI_P_EC_NOT_DETECTED;
    goto ErrorExit;
  }

  REPORT_STATUS_CODE_WITH_DEVICE_PATH (
    EFI_PROGRESS_CODE,
    EFI_PERIPHERAL_MOUSE | EFI_P_PC_DETECTED,
    ParentDevicePath
    );

  //
  // Setup the WaitForKey event
  //
  Status = gBS->CreateEvent (
                  EVT_NOTIFY_WAIT,
                  TPL_NOTIFY,
                  MouseAbsolutePointerWaitForInput,
                  MouseAbsolutePointerDev,
                  &((MouseAbsolutePointerDev->AbsolutePointerProtocol).WaitForInput)
                  );
  if (EFI_ERROR (Status)) {
    Status = EFI_OUT_OF_RESOURCES;
    goto ErrorExit;
  }
  //
  // Setup a periodic timer, used to poll mouse state
  //
  Status = gBS->CreateEvent (
                  EVT_TIMER | EVT_NOTIFY_SIGNAL,
                  TPL_NOTIFY,
                  PollMouseAbsolutePointer,
                  MouseAbsolutePointerDev,
                  &MouseAbsolutePointerDev->TimerEvent
                  );
  if (EFI_ERROR (Status)) {
    Status = EFI_OUT_OF_RESOURCES;
    goto ErrorExit;
  }
  //
  // Start timer to poll mouse (100 samples per second)
  //
  Status = gBS->SetTimer (MouseAbsolutePointerDev->TimerEvent, TimerPeriodic, 100000);
  if (EFI_ERROR (Status)) {
    Status = EFI_OUT_OF_RESOURCES;
    goto ErrorExit;
  }

  MouseAbsolutePointerDev->ControllerNameTable = NULL;
  AddUnicodeString2 (
    "eng",
    gPs2MouseAbsolutePointerComponentName.SupportedLanguages,
    &MouseAbsolutePointerDev->ControllerNameTable,
    L"Faked PS/2 Touchpad Device",
    TRUE
    );
  AddUnicodeString2 (
    "en",
    gPs2MouseAbsolutePointerComponentName2.SupportedLanguages,
    &MouseAbsolutePointerDev->ControllerNameTable,
    L"Faked PS/2 Touchpad Device",
    FALSE
    );


  //
  // Install protocol interfaces for the mouse device.
  //
  Status = gBS->InstallMultipleProtocolInterfaces (
                  &Controller,
                  &gEfiAbsolutePointerProtocolGuid,
                  &MouseAbsolutePointerDev->AbsolutePointerProtocol,
                  NULL
                  );
  if (EFI_ERROR (Status)) {
    goto ErrorExit;
  }

  gBS->RestoreTPL (OldTpl);

  return Status;

ErrorExit:

  KbcDisableAux (IsaIo);

  if (StatusCode != 0) {
    REPORT_STATUS_CODE_WITH_DEVICE_PATH (
      EFI_ERROR_CODE | EFI_ERROR_MINOR,
      StatusCode,
      ParentDevicePath
      );
  }

  if ((MouseAbsolutePointerDev != NULL) && (MouseAbsolutePointerDev->AbsolutePointerProtocol.WaitForInput != NULL)) {
    gBS->CloseEvent (MouseAbsolutePointerDev->AbsolutePointerProtocol.WaitForInput);
  }

  if ((MouseAbsolutePointerDev != NULL) && (MouseAbsolutePointerDev->TimerEvent != NULL)) {
    gBS->CloseEvent (MouseAbsolutePointerDev->TimerEvent);
  }

  if ((MouseAbsolutePointerDev != NULL) && (MouseAbsolutePointerDev->ControllerNameTable != NULL)) {
    FreeUnicodeStringTable (MouseAbsolutePointerDev->ControllerNameTable);
  }
  //
  // Since there will be no timer handler for mouse input any more,
  // exhaust input data just in case there is still mouse data left
  //
  EmptyStatus = EFI_SUCCESS;
  while (!EFI_ERROR (EmptyStatus)) {
    EmptyStatus = In8042Data (IsaIo, &Data);
  }

  if (MouseAbsolutePointerDev != NULL) {
    FreePool (MouseAbsolutePointerDev);
  }

  gBS->CloseProtocol (
         Controller,
         &gEfiDevicePathProtocolGuid,
         This->DriverBindingHandle,
         Controller
         );

  gBS->CloseProtocol (
         Controller,
         &gEfiIsaIoProtocolGuid,
         This->DriverBindingHandle,
         Controller
         );

  gBS->RestoreTPL (OldTpl);

  return Status;
}

/**
  Stop this driver on ControllerHandle. Support stopping any child handles
  created by this driver.

  @param  This              Protocol instance pointer.
  @param  ControllerHandle  Handle of device to stop driver on
  @param  NumberOfChildren  Number of Handles in ChildHandleBuffer. If number of
                            children is zero stop the entire bus driver.
  @param  ChildHandleBuffer List of Child Handles to Stop.

  @retval EFI_SUCCESS       This driver is removed ControllerHandle
  @retval other             This driver was not removed from this device

**/
EFI_STATUS
EFIAPI
PS2MouseAbsolutePointerDriverStop (
  IN EFI_DRIVER_BINDING_PROTOCOL    *This,
  IN EFI_HANDLE                     Controller,
  IN UINTN                          NumberOfChildren,
  IN EFI_HANDLE                     *ChildHandleBuffer
  )
{
  EFI_STATUS                            Status;
  EFI_ABSOLUTE_POINTER_PROTOCOL         *AbsolutePointerProtocol;
  PS2_MOUSE_ABSOLUTE_POINTER_DEV       *MouseAbsolutePointerDev;
  UINT8                                 Data;

  Status = gBS->OpenProtocol (
                  Controller,
                  &gEfiAbsolutePointerProtocolGuid,
                  (VOID **) &AbsolutePointerProtocol,
                  This->DriverBindingHandle,
                  Controller,
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
                  );
  if (EFI_ERROR (Status)) {
    return EFI_SUCCESS;
  }

  MouseAbsolutePointerDev = PS2_MOUSE_ABSOLUTE_POINTER_DEV_FROM_THIS (AbsolutePointerProtocol);

  //
  // Report that the keyboard is being disabled
  //
  REPORT_STATUS_CODE_WITH_DEVICE_PATH (
    EFI_PROGRESS_CODE,
    EFI_PERIPHERAL_MOUSE | EFI_P_PC_DISABLE,
    MouseAbsolutePointerDev->DevicePath
    );

  Status = gBS->UninstallProtocolInterface (
                  Controller,
                  &gEfiAbsolutePointerProtocolGuid,
                  &MouseAbsolutePointerDev->AbsolutePointerProtocol
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }

  //
  // Cancel mouse data polling timer, close timer event
  //
  gBS->SetTimer (MouseAbsolutePointerDev->TimerEvent, TimerCancel, 0);
  gBS->CloseEvent (MouseAbsolutePointerDev->TimerEvent);

  //
  // Since there will be no timer handler for mouse input any more,
  // exhaust input data just in case there is still mouse data left
  //
  Status = EFI_SUCCESS;
  while (!EFI_ERROR (Status)) {
    Status = In8042Data (MouseAbsolutePointerDev->IsaIo, &Data);
  }

  gBS->CloseEvent (MouseAbsolutePointerDev->AbsolutePointerProtocol.WaitForInput);
  FreeUnicodeStringTable (MouseAbsolutePointerDev->ControllerNameTable);
  FreePool (MouseAbsolutePointerDev);

  gBS->CloseProtocol (
         Controller,
         &gEfiDevicePathProtocolGuid,
         This->DriverBindingHandle,
         Controller
         );

  gBS->CloseProtocol (
         Controller,
         &gEfiIsaIoProtocolGuid,
         This->DriverBindingHandle,
         Controller
         );

  return EFI_SUCCESS;
}

/**
  Reset the Mouse and do BAT test for it, if ExtendedVerification is TRUE and there is a mouse device connected to system.

  @param This                 - Pointer of simple pointer Protocol.
  @param ExtendedVerification - Whether configure mouse parameters. True: do; FALSE: skip.


  @retval EFI_SUCCESS         - The command byte is written successfully.
  @retval EFI_DEVICE_ERROR    - Errors occurred during resetting keyboard.

**/
EFI_STATUS
EFIAPI
MouseAbsolutePointerReset (
  IN EFI_ABSOLUTE_POINTER_PROTOCOL    *This,
  IN BOOLEAN                          ExtendedVerification
  )
{
  EFI_STATUS                       Status;
  PS2_MOUSE_ABSOLUTE_POINTER_DEV  *MouseAbsolutePointerDev;
  EFI_TPL                          OldTpl;
  BOOLEAN                          KeyboardEnable;
  UINT8                            Data;

  MouseAbsolutePointerDev = PS2_MOUSE_ABSOLUTE_POINTER_DEV_FROM_THIS (This);

  //
  // Report reset progress code
  //
  REPORT_STATUS_CODE_WITH_DEVICE_PATH (
    EFI_PROGRESS_CODE,
    EFI_PERIPHERAL_MOUSE | EFI_P_PC_RESET,
    MouseAbsolutePointerDev->DevicePath
    );

  KeyboardEnable = FALSE;

  //
  // Raise TPL to avoid keyboard operation impact
  //
  OldTpl = gBS->RaiseTPL (TPL_NOTIFY);

  ZeroMem (&MouseAbsolutePointerDev->State, sizeof (EFI_ABSOLUTE_POINTER_STATE));
  MouseAbsolutePointerDev->StateChanged = FALSE;

  //
  // Exhaust input data
  //
  Status = EFI_SUCCESS;
  while (!EFI_ERROR (Status)) {
    Status = In8042Data (MouseAbsolutePointerDev->IsaIo, &Data);
  }

  CheckKbStatus (MouseAbsolutePointerDev->IsaIo, &KeyboardEnable);

  KbcDisableKb (MouseAbsolutePointerDev->IsaIo);

  MouseAbsolutePointerDev->IsaIo->Io.Read (MouseAbsolutePointerDev->IsaIo, EfiIsaIoWidthUint8, KBC_CMD_STS_PORT, 1, &Data);

  //
  // if there's data block on KBC data port, read it out
  //
  if ((Data & KBC_OUTB) == KBC_OUTB) {
    MouseAbsolutePointerDev->IsaIo->Io.Read (MouseAbsolutePointerDev->IsaIo, EfiIsaIoWidthUint8, KBC_DATA_PORT, 1, &Data);
  }

  Status = EFI_SUCCESS;
  //
  // The PS2 mouse driver reset behavior is always successfully return no matter wheater or not there is mouse connected to system.
  // This behavior is needed by performance speed. The following mouse command only succeessfully finish when mouse device is
  // connected to system, so if PS2 mouse device not connect to system or user not ask for, we skip the mouse configuration and enabling
  //
  if (ExtendedVerification && CheckMouseAbsolutePointerConnect (MouseAbsolutePointerDev)) {
    //
    // Send mouse reset command and set mouse default configure
    //
    Status = PS2MouseReset (MouseAbsolutePointerDev->IsaIo);
    if (EFI_ERROR (Status)) {
      Status = EFI_DEVICE_ERROR;
      goto Exit;
    }

    Status = PS2MouseSetSampleRate (MouseAbsolutePointerDev->IsaIo, MouseAbsolutePointerDev->SampleRate);
    if (EFI_ERROR (Status)) {
      Status = EFI_DEVICE_ERROR;
      goto Exit;
    }

    Status = PS2MouseSetResolution (MouseAbsolutePointerDev->IsaIo, MouseAbsolutePointerDev->Resolution);
    if (EFI_ERROR (Status)) {
      Status = EFI_DEVICE_ERROR;
      goto Exit;
    }

    Status = PS2MouseSetScaling (MouseAbsolutePointerDev->IsaIo, MouseAbsolutePointerDev->Scaling);
    if (EFI_ERROR (Status)) {
      Status = EFI_DEVICE_ERROR;
      goto Exit;
    }

    Status = PS2MouseEnable (MouseAbsolutePointerDev->IsaIo);
    if (EFI_ERROR (Status)) {
      Status = EFI_DEVICE_ERROR;
      goto Exit;
    }
  }
Exit:
  gBS->RestoreTPL (OldTpl);

  if (KeyboardEnable) {
    KbcEnableKb (MouseAbsolutePointerDev->IsaIo);
  }

  return Status;
}

/**
  Check whether there is Ps/2 mouse device in system

  @param MouseAbsolutePointerDev - Absolute Pointer Device Private Data Structure

  @retval TRUE                - Keyboard in System.
  @retval FALSE               - Keyboard not in System.

**/
BOOLEAN
CheckMouseAbsolutePointerConnect (
  IN  PS2_MOUSE_ABSOLUTE_POINTER_DEV     *MouseAbsolutePointerDev
  )

{
  EFI_STATUS     Status;

  Status = PS2MouseEnable (MouseAbsolutePointerDev->IsaIo);
  if (!EFI_ERROR (Status)) {
    return TRUE;
  }

  return FALSE;
}

/**
  Get and Clear mouse status.

  @param This                 - Pointer of simple pointer Protocol.
  @param State                - Output buffer holding status.

  @retval EFI_INVALID_PARAMETER Output buffer is invalid.
  @retval EFI_NOT_READY         Mouse is not changed status yet.
  @retval EFI_SUCCESS           Mouse status is changed and get successful.
**/
EFI_STATUS
EFIAPI
MouseAbsolutePointerGetState (
  IN EFI_ABSOLUTE_POINTER_PROTOCOL     *This,
  IN OUT EFI_ABSOLUTE_POINTER_STATE    *State
  )
{
  PS2_MOUSE_ABSOLUTE_POINTER_DEV *MouseAbsolutePointerDev;
  EFI_TPL       OldTpl;

  MouseAbsolutePointerDev = PS2_MOUSE_ABSOLUTE_POINTER_DEV_FROM_THIS (This);

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

  if (!MouseAbsolutePointerDev->StateChanged) {
    return EFI_NOT_READY;
  }

  OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
  CopyMem (State, &(MouseAbsolutePointerDev->State), sizeof (EFI_ABSOLUTE_POINTER_STATE));

  //
  // clear mouse state
  //
  MouseAbsolutePointerDev->State.CurrentX = 0;
  MouseAbsolutePointerDev->State.CurrentY = 0;
  MouseAbsolutePointerDev->State.CurrentZ = 0;
  MouseAbsolutePointerDev->State.ActiveButtons = 0x0;
  MouseAbsolutePointerDev->StateChanged            = FALSE;
  gBS->RestoreTPL (OldTpl);

  return EFI_SUCCESS;
}

/**

  Event notification function for SIMPLE_POINTER.WaitForInput event.
  Signal the event if there is input from mouse.

  @param Event    event object
  @param Context  event context

**/
VOID
EFIAPI
MouseAbsolutePointerWaitForInput (
  IN  EFI_EVENT               Event,
  IN  VOID                    *Context
  )
{
  PS2_MOUSE_ABSOLUTE_POINTER_DEV *MouseAbsolutePointerDev;

  MouseAbsolutePointerDev = (PS2_MOUSE_ABSOLUTE_POINTER_DEV *) Context;

  //
  // Someone is waiting on the mouse event, if there's
  // input from mouse, signal the event
  //
  if (MouseAbsolutePointerDev->StateChanged) {
    gBS->SignalEvent (Event);
  }

}

/**
  Event notification function for TimerEvent event.
  If mouse device is connected to system, try to get the mouse packet data.

  @param Event      -  TimerEvent in PS2_MOUSE_DEV
  @param Context    -  Pointer to PS2_MOUSE_DEV structure

**/
VOID
EFIAPI
PollMouseAbsolutePointer(
  IN EFI_EVENT  Event,
  IN VOID       *Context
  )

{
  PS2_MOUSE_ABSOLUTE_POINTER_DEV *MouseAbsolutePointerDev;

  MouseAbsolutePointerDev = (PS2_MOUSE_ABSOLUTE_POINTER_DEV *) Context;

  //
  // Polling mouse packet data
  //
  PS2MouseGetPacket (MouseAbsolutePointerDev);
}

/**
  The user Entry Point for module Ps2MouseAbsolutePointer. The user code starts with this function.

  @param[in] ImageHandle    The firmware allocated handle for the EFI image.
  @param[in] SystemTable    A pointer to the EFI System Table.

  @retval EFI_SUCCESS       The entry point is executed successfully.
  @retval other             Some error occurs when executing this entry point.

**/
EFI_STATUS
EFIAPI
InitializePs2MouseAbsolutePointer(
  IN EFI_HANDLE           ImageHandle,
  IN EFI_SYSTEM_TABLE     *SystemTable
  )
{
  EFI_STATUS              Status;

  //
  // Install driver model protocol(s).
  //
  Status = EfiLibInstallDriverBindingComponentName2 (
             ImageHandle,
             SystemTable,
             &gPS2MouseAbsolutePointerDriver,
             ImageHandle,
             &gPs2MouseAbsolutePointerComponentName,
             &gPs2MouseAbsolutePointerComponentName2
             );
  ASSERT_EFI_ERROR (Status);


  return Status;
}