EVT_UFX_DEVICE_REMOTE_WAKEUP_SIGNAL - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// ufxclient.h
EVT_UFX_DEVICE_REMOTE_WAKEUP_SIGNAL EvtUfxDeviceRemoteWakeupSignal;
VOID EvtUfxDeviceRemoteWakeupSignal(
[in] UFXDEVICE unnamedParam1
)
{...}
View the official Windows Driver Kit DDI referenceNo description available.
The client driver's implementation to initiate remote wake-up on the function controller.
unnamedParam1 [in]The handle to a USB device object that the client driver received in a previous call to the UfxDeviceCreate method.
The client driver for the function host controller registers its EVT_UFX_DEVICE_REMOTE_WAKEUP_SIGNAL implementation with the USB function class extension (UFX) by calling the UfxDeviceCreate method.
The client driver indicates completion of this event by calling the UfxDeviceEventComplete method.
EVT_UFX_DEVICE_REMOTE_WAKEUP_SIGNAL UfxDevice_EvtDeviceRemoteWakeupSignal;
VOID
UfxDevice_EvtDeviceRemoteWakeupSignal (
_In_ UFXDEVICE UfxDevice
)
/*++
Routine Description:
Signals Remote Wakeup to the Host by issuing a link state change command.
It acquires and releases the power reference to ensure a valid power state
before accessing the device.
Arguments:
UfxDevice - UFXDEVICE object representing the device.
--*/
{
NTSTATUS Status;
PUFXDEVICE_CONTEXT DeviceContext;
PAGED_CODE();
TraceEntry();
DeviceContext = UfxDeviceGetContext(UfxDevice);
//
// Stop Idle to ensure the device is in working state
//
Status = WdfDeviceStopIdle(DeviceContext->FdoWdfDevice, TRUE);
if (!NT_SUCCESS(Status)) {
TraceError("Failed to stop idle %!STATUS!", Status);
goto End;
}
//
// Issue a Link State Change Request.
//
//
// #### TODO: Insert code to issue a link state change on the controller ####
//
WdfDeviceResumeIdle(DeviceContext->FdoWdfDevice);
End:
UfxDeviceEventComplete(UfxDevice, Status);
TraceExit();
}