private void GetHostControllerPowerMap(IntPtr handle)
{
UsbUser.WdmusbPowerState powerState = UsbUser.WdmusbPowerState.WdmUsbPowerSystemWorking;
for (; powerState <= UsbUser.WdmusbPowerState.WdmUsbPowerSystemShutdown; powerState++)
{
UsbUser.UsbuserPowerInfoRequest powerInfoRequest = new UsbUser.UsbuserPowerInfoRequest
{
Header =
{
UsbUserRequest = UsbUser.UsbuserGetPowerStateMap,
},
PowerInformation = { SystemState = powerState }
};
powerInfoRequest.Header.RequestBufferLength = (uint)Marshal.SizeOf(powerInfoRequest);
IntPtr ptrPowerInfoRequest = IntPtr.Zero;
try
{
//
// Now query USBHUB for the USB_POWER_INFO structure for this hub.
// For Selective Suspend support
//
int nBytes = Marshal.SizeOf(powerInfoRequest);
ptrPowerInfoRequest = Marshal.AllocHGlobal(nBytes);
Marshal.StructureToPtr(powerInfoRequest, ptrPowerInfoRequest, true);
var success = KernelApi.DeviceIoControl(handle,
UsbUser.IoctlUsbUserRequest,
ptrPowerInfoRequest,
nBytes,
ptrPowerInfoRequest,
nBytes,
out _,
IntPtr.Zero);
if (!success)
{
CoreTraceSource.Source.TraceEvent(TraceEventType.Error, CoreTraceSource.UsbControllerSourceId,
$"[{nameof(KernelApi.DeviceIoControl)}] Returned Error Code: [{KernelApi.GetLastError():X}]");
}
else
{
powerInfoRequest = (UsbUser.UsbuserPowerInfoRequest)Marshal.PtrToStructure(ptrPowerInfoRequest,
typeof(UsbUser.UsbuserPowerInfoRequest));
PowerInfo.Add(powerInfoRequest.PowerInformation);
}
}
finally
{
if (ptrPowerInfoRequest != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptrPowerInfoRequest);
}
}
}
}
public static string Display(this UsbUser.WdmusbPowerState state)
{
string result;
switch (state)
{
case UsbUser.WdmusbPowerState.WdmUsbPowerNotMapped:
result = "S? (unmapped)";
break;
case UsbUser.WdmusbPowerState.WdmUsbPowerSystemUnspecified:
result = "S? (unspecified)";
break;
case UsbUser.WdmusbPowerState.WdmUsbPowerSystemWorking:
result = "S0 (working)";
break;
case UsbUser.WdmusbPowerState.WdmUsbPowerSystemSleeping1:
result = "S1 (sleep)";
break;
case UsbUser.WdmusbPowerState.WdmUsbPowerSystemSleeping2:
result = "S2 (sleep)";
break;
case UsbUser.WdmusbPowerState.WdmUsbPowerSystemSleeping3:
result = "S3 (sleep)";
break;
case UsbUser.WdmusbPowerState.WdmUsbPowerSystemHibernate:
result = "S4 (Hibernate)";
break;
case UsbUser.WdmusbPowerState.WdmUsbPowerSystemShutdown:
result = "S5 (shutdown)";
break;
case UsbUser.WdmusbPowerState.WdmUsbPowerDeviceUnspecified:
result = "D? (unspecified)";
break;
case UsbUser.WdmusbPowerState.WdmUsbPowerDeviceD0:
result = "D0";
break;
case UsbUser.WdmusbPowerState.WdmUsbPowerDeviceD1:
result = "D1";
break;
case UsbUser.WdmusbPowerState.WdmUsbPowerDeviceD2:
result = "D2";
break;
case UsbUser.WdmusbPowerState.WdmUsbPowerDeviceD3:
result = "D3";
break;
default:
throw new ArgumentOutOfRangeException(nameof(state), state, null);
}
return(result);
}
