Magic Trackpad 2: use standard Microsoft processing spec

This is defined in https://docs.microsoft.com/en-us/windows-hardware/design/component-guidelines/touchpad-windows-precision-touchpad-collection, and I slightly modified it for MT2. Should partially mitigate issue #212, #170, #166, #163, #161, #94, #38, #37 and #83.

src/AmtPtpDeviceUsbUm/Device.c

@@ -117,7 +117,6 @@ AmtPtpCreateDevice(
 	return status;
 }
 
-_IRQL_requires_(PASSIVE_LEVEL)
 NTSTATUS
 AmtPtpEvtDevicePrepareHardware(
 	_In_ WDFDEVICE Device,
@@ -189,61 +188,6 @@ AmtPtpEvtDevicePrepareHardware(
 			);
 			return status;
 		}
-
-		// Set fuzz information
-		pDeviceContext->HorizonalFuzz = pDeviceContext->DeviceInfo->x.snratio ?
-			(pDeviceContext->DeviceInfo->x.max - pDeviceContext->DeviceInfo->x.min) / pDeviceContext->DeviceInfo->x.snratio :
-			0.0;
-
-		pDeviceContext->VerticalFuzz = pDeviceContext->DeviceInfo->y.snratio ?
-			(pDeviceContext->DeviceInfo->y.max - pDeviceContext->DeviceInfo->y.min) / pDeviceContext->DeviceInfo->y.snratio :
-			0.0;
-
-		pDeviceContext->PressureFuzz = pDeviceContext->DeviceInfo->p.snratio ?
-			(pDeviceContext->DeviceInfo->p.max - pDeviceContext->DeviceInfo->p.min) / pDeviceContext->DeviceInfo->p.snratio :
-			0.0;
-
-		pDeviceContext->WidthFuzz = pDeviceContext->DeviceInfo->w.snratio ?
-			(pDeviceContext->DeviceInfo->w.max - pDeviceContext->DeviceInfo->w.min) / pDeviceContext->DeviceInfo->w.snratio :
-			0.0;
-
-		pDeviceContext->OrientationFuzz = pDeviceContext->DeviceInfo->o.snratio ?
-			(pDeviceContext->DeviceInfo->o.max - pDeviceContext->DeviceInfo->o.min) / pDeviceContext->DeviceInfo->o.snratio :
-			0.0;
-
-		pDeviceContext->SgContactSizeQualLevel = SIZE_QUALIFICATION_THRESHOLD;
-		pDeviceContext->MuContactSizeQualLevel = SIZE_MU_LOWER_THRESHOLD;
-		pDeviceContext->PressureQualLevel = PRESSURE_QUALIFICATION_THRESHOLD;
-
-		pDeviceContext->TouchStateMachineInfo.HorizonalFuzz		= pDeviceContext->HorizonalFuzz;
-		pDeviceContext->TouchStateMachineInfo.VerticalFuzz		= pDeviceContext->VerticalFuzz;
-		pDeviceContext->TouchStateMachineInfo.WidthFuzz			= pDeviceContext->WidthFuzz;
-		pDeviceContext->TouchStateMachineInfo.OrientationFuzz	= pDeviceContext->OrientationFuzz;
-		pDeviceContext->TouchStateMachineInfo.PressureFuzz		= pDeviceContext->PressureFuzz;
-
-		status = SmResetState(&pDeviceContext->TouchStateMachineInfo);
-		if (!NT_SUCCESS(status)) {
-
-			TraceEvents(
-				TRACE_LEVEL_ERROR,
-				TRACE_DEVICE,
-				"%!FUNC! SmResetState failed with %!STATUS!",
-				status
-			);
-			return status;
-
-		}
-
-		TraceEvents(
-			TRACE_LEVEL_INFORMATION, 
-			TRACE_DEVICE, 
-			"%!FUNC! fuzz information: h = %f, v = %f, p = %f, w = %f, o = %f", 
-			pDeviceContext->HorizonalFuzz,
-			pDeviceContext->VerticalFuzz,
-			pDeviceContext->PressureFuzz,
-			pDeviceContext->WidthFuzz,
-			pDeviceContext->OrientationFuzz
-		);
 	}
 
 	//
@@ -551,8 +495,6 @@ AmtPtpSetWellspringMode(
 
 }
 
-// D0 Entry & Exit
-_IRQL_requires_(PASSIVE_LEVEL)
 NTSTATUS
 AmtPtpEvtDeviceD0Entry(
 	_In_ WDFDEVICE Device,
@@ -642,7 +584,6 @@ AmtPtpEvtDeviceD0Entry(
 	return status;
 }
 
-_IRQL_requires_(PASSIVE_LEVEL)
 NTSTATUS
 AmtPtpEvtDeviceD0Exit(
 	_In_ WDFDEVICE Device,

src/AmtPtpDeviceUsbUm/Device.h

@@ -24,14 +24,7 @@ typedef struct _DEVICE_CONTEXT
 	BOOL                        IsSurfaceReportOn;
 	BOOL                        IsButtonReportOn;
 
-	double                      HorizonalFuzz;
-	double                      VerticalFuzz;
-	double                      PressureFuzz;
-	double                      WidthFuzz;
-	double						OrientationFuzz;
-
 	PTP_CONTACT_RAW             ContactRepository[5];
-	SM_RUNTIME_INFORMATION		TouchStateMachineInfo;
 
 	LARGE_INTEGER				PerfCounter;
 
@@ -63,6 +56,8 @@ AmtPtpCreateDevice(
 // handle
 //
 EVT_WDF_DEVICE_PREPARE_HARDWARE AmtPtpEvtDevicePrepareHardware;
+EVT_WDF_DEVICE_D0_ENTRY AmtPtpEvtDeviceD0Entry;
+EVT_WDF_DEVICE_D0_EXIT AmtPtpEvtDeviceD0Exit;
 
 _IRQL_requires_(PASSIVE_LEVEL)
 NTSTATUS
@@ -96,20 +91,6 @@ DbgDevicePowerString(
 	_In_ WDF_POWER_DEVICE_STATE Type
 );
 
-_IRQL_requires_(PASSIVE_LEVEL)
-NTSTATUS
-AmtPtpEvtDeviceD0Entry(
-	_In_ WDFDEVICE Device,
-	_In_ WDF_POWER_DEVICE_STATE PreviousState
-);
-
-_IRQL_requires_(PASSIVE_LEVEL)
-NTSTATUS
-AmtPtpEvtDeviceD0Exit(
-	_In_ WDFDEVICE Device,
-	_In_ WDF_POWER_DEVICE_STATE TargetState
-);
-
 _IRQL_requires_(PASSIVE_LEVEL)
 VOID
 AmtPtpEvtUsbInterruptPipeReadComplete(

src/AmtPtpDeviceUsbUm/Driver.h

@@ -14,7 +14,6 @@
 
 #include "AppleDefinition.h"
 #include "Hid.h"
-#include "InputStateMachine.h"
 #include "Device.h"
 #include "Queue.h"