【UEFI】Simple Pointer Protocol

We have an issue with i2C touch pad in factory, so I write a efi shell application for factory to check the movement of touch pad.

Protocol : EFI_SIMPLE_POINTER_PROTOCOL

The definition of EFI_SIMPLE_POINTER_PROTOCOL in UEFI spec v2.6

EFI_SIMPLE_POINTER_PROTOCOL.GetState():

First, we define the GUID of SIMPLE PROTOCOL

#include <efi.h>
#include <efilib.h>

#define EFI_SIMPLE_POINTER_PROTOCOL_GUID \
 {0x31878c87, 0xb75,0x11d5,0x9a,0x4f,0x00,0x90,0x27,0x3f,0xc1,0x4d}

Then declare system table, boot service, runtime service

EFI_GUID efi_simple_pointer_protocol_guid = EFI_SIMPLE_POINTER_PROTOCOL_GUID;
EFI_SYSTEM_TABLE *my_system_table;
EFI_BOOT_SERVICES *my_boot_services;
EFI_RUNTIME_SERVICES *my_runtime_services;
EFI_SIMPLE_POINTER_PROTOCOL *SimplePointer;
EFI_SIMPLE_POINTER_STATE *State;

The entry:

EFI_STATUS Simple_protocol(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *my_system_table)
{ 
 EFI_STATUS Status; 

 InitializeLib (ImageHandle, my_system_table);
 my_boot_services=my_system_table->BootServices;
 my_runtime_services=my_system_table->RuntimeServices;
 
 Status = my_boot_services->LocateProtocol(
  &efi_simple_pointer_protocol_guid,
  NULL,
  (VOID**)&SimplePointer);
 if (EFI_ERROR(Status)) {
  Print(L"Status: %r\n",Status);
  return Status;  
 } 
 
 Status = SimplePointer->GetState(SimplePointer,State);
  
 if (EFI_ERROR(Status)) {
  // Print(L"waiting \n",Status);
   return Status;  
        } else {
  Print(L"X: %d\n",State->RelativeMovementX);
  Print(L"Y %d\n",State->RelativeMovementY);
  return 0;
  }
  
 }
 return 0; 
}

The sample efi application(Google Drive):
http://bit.ly/2WGSNKL
usage:

1.if no parameter, the application will wait until touch the touch pad
fs5:\>Simple_protocol.efi

2. Add time parameter(sec)
fs5:\>Simple_protocol.efi 15
In 15 sec, nobody touch will show nobody touch, otherwise, screen will show the movement.