diff --git a/reactos/drivers/wdm/audio/hdaudbus/businterface.cpp b/reactos/drivers/wdm/audio/hdaudbus/businterface.cpp
index 3da22ea5e24..ed035420c5a 100644
--- a/reactos/drivers/wdm/audio/hdaudbus/businterface.cpp
+++ b/reactos/drivers/wdm/audio/hdaudbus/businterface.cpp
@@ -7,17 +7,255 @@
 */
 #include "hdaudbus.h"
 
+
+VOID
+NTAPI
+HDA_InterfaceReference(
+PVOID BusContext)
+{
+    DPRINT1("HDA_InterfaceReference\n");
+}
+
+VOID
+NTAPI
+HDA_InterfaceDereference(
+PVOID BusContext)
+{
+    DPRINT1("HDA_InterfaceDereference\n");
+}
+
+NTSTATUS
+NTAPI
+HDA_TransferCodecVerbs(
+IN PVOID _context,
+IN ULONG Count,
+IN OUT PHDAUDIO_CODEC_TRANSFER CodecTransfer,
+IN PHDAUDIO_TRANSFER_COMPLETE_CALLBACK Callback,
+IN PVOID Context)
+{
+    UNIMPLEMENTED;
+    ASSERT(FALSE);
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS
+NTAPI 
+HDA_AllocateCaptureDmaEngine(
+    IN PVOID _context,
+    IN UCHAR CodecAddress,
+    IN PHDAUDIO_STREAM_FORMAT StreamFormat,
+    OUT PHANDLE Handle,
+    OUT PHDAUDIO_CONVERTER_FORMAT ConverterFormat)
+{
+    UNIMPLEMENTED;
+    ASSERT(FALSE);
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS
+NTAPI
+HDA_AllocateRenderDmaEngine(
+    IN PVOID _context,
+    IN PHDAUDIO_STREAM_FORMAT StreamFormat,
+    IN BOOLEAN Stripe,
+    OUT PHANDLE Handle,
+    OUT PHDAUDIO_CONVERTER_FORMAT ConverterFormat)
+{
+    UNIMPLEMENTED;
+    ASSERT(FALSE);
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS
+NTAPI
+HDA_ChangeBandwidthAllocation(
+    IN PVOID _context,
+    IN HANDLE Handle,
+    IN PHDAUDIO_STREAM_FORMAT StreamFormat,
+    OUT PHDAUDIO_CONVERTER_FORMAT ConverterFormat)
+{
+    UNIMPLEMENTED;
+    ASSERT(FALSE);
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS
+NTAPI
+HDA_AllocateDmaBuffer(
+    IN PVOID _context,
+    IN HANDLE Handle,
+    IN SIZE_T RequestedBufferSize,
+    OUT PMDL *BufferMdl,
+    OUT PSIZE_T AllocatedBufferSize,
+    OUT PUCHAR StreamId,
+    OUT PULONG FifoSize)
+{
+    UNIMPLEMENTED;
+    ASSERT(FALSE);
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS
+NTAPI
+HDA_FreeDmaBuffer(
+    IN PVOID _context,
+    IN HANDLE Handle)
+{
+    UNIMPLEMENTED;
+    ASSERT(FALSE);
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS
+NTAPI
+HDA_FreeDmaEngine(
+    IN PVOID _context,
+    IN HANDLE Handle)
+{
+    UNIMPLEMENTED;
+    ASSERT(FALSE);
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS
+NTAPI
+HDA_SetDmaEngineState(
+    IN PVOID _context,
+    IN HDAUDIO_STREAM_STATE StreamState,
+    IN ULONG NumberOfHandles,
+    IN PHANDLE Handles)
+{
+    UNIMPLEMENTED;
+    ASSERT(FALSE);
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+VOID
+NTAPI
+HDA_GetWallClockRegister(
+    IN PVOID _context,
+    OUT PULONG *Wallclock)
+{
+    UNIMPLEMENTED;
+    ASSERT(FALSE);
+}
+
+NTSTATUS
+NTAPI
+HDA_GetLinkPositionRegister(
+    IN PVOID _context,
+    IN HANDLE Handle,
+    OUT PULONG *Position)
+{
+    UNIMPLEMENTED;
+    ASSERT(FALSE);
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS
+NTAPI
+HDA_RegisterEventCallback(
+    IN PVOID _context,
+    IN PHDAUDIO_UNSOLICITED_RESPONSE_CALLBACK Routine,
+    IN PVOID Context,
+    OUT PUCHAR Tag)
+{
+    UNIMPLEMENTED;
+	*Tag = 1;
+    return STATUS_SUCCESS;
+}
+
+
+NTSTATUS
+NTAPI
+HDA_UnregisterEventCallback(
+IN PVOID _context,
+IN UCHAR Tag)
+{
+    UNIMPLEMENTED;
+    ASSERT(FALSE);
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS
+NTAPI
+HDA_GetDeviceInformation(
+    IN PVOID _context,
+    OUT PHDAUDIO_DEVICE_INFORMATION DeviceInformation)
+{
+    PHDA_PDO_DEVICE_EXTENSION DeviceExtension;
+
+    DeviceExtension = (PHDA_PDO_DEVICE_EXTENSION)_context;
+
+    DPRINT1("HDA_GetDeviceInformation\n");
+
+    DeviceInformation->Size = sizeof(HDAUDIO_DEVICE_INFORMATION);
+    DeviceInformation->CodecsDetected = 1;  // FIXME
+    DeviceInformation->DeviceVersion = DeviceExtension->Codec->Major << 8 | DeviceExtension->Codec->Minor;
+    DeviceInformation->DriverVersion = DeviceExtension->Codec->Major << 8 | DeviceExtension->Codec->Minor;
+    DeviceInformation->IsStripingSupported = FALSE;
+
+    return STATUS_SUCCESS;
+}
+
+VOID
+NTAPI
+HDA_GetResourceInformation(
+    IN PVOID _context,
+    OUT PUCHAR CodecAddress,
+    OUT PUCHAR FunctionGroupStartNode)
+{
+    PHDA_PDO_DEVICE_EXTENSION DeviceExtension;
+
+    DeviceExtension = (PHDA_PDO_DEVICE_EXTENSION)_context;
+
+    DPRINT1("HDA_GetResourceInformation Addr %x NodeId %x\n", DeviceExtension->Codec->Addr, DeviceExtension->AudioGroup->NodeId);
+
+    *CodecAddress = DeviceExtension->Codec->Addr;
+    *FunctionGroupStartNode = DeviceExtension->AudioGroup->NodeId;
+}
+
 NTSTATUS
 HDA_PDOHandleQueryInterface(
     IN PDEVICE_OBJECT DeviceObject,
     IN PIRP Irp)
 {
     PIO_STACK_LOCATION IoStack;
-    UNICODE_STRING GuidString;
+    PHDAUDIO_BUS_INTERFACE InterfaceHDA;
+    PHDA_PDO_DEVICE_EXTENSION DeviceExtension;
+
+    /* get device extension */
+    DeviceExtension = (PHDA_PDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
+    ASSERT(DeviceExtension->IsFDO == FALSE);
 
     IoStack = IoGetCurrentIrpStackLocation(Irp);
-    RtlStringFromGUID(*IoStack->Parameters.QueryInterface.InterfaceType, &GuidString);
 
-    DPRINT1("hda: requesting interface %wZ Version %u Size %u", &GuidString, IoStack->Parameters.QueryInterface.Version, IoStack->Parameters.QueryInterface.Size);
-    return STATUS_NOT_IMPLEMENTED;
+    if (IsEqualGUIDAligned(*IoStack->Parameters.QueryInterface.InterfaceType, GUID_HDAUDIO_BUS_INTERFACE))
+    {
+        InterfaceHDA = (PHDAUDIO_BUS_INTERFACE)IoStack->Parameters.QueryInterface.Interface;
+        InterfaceHDA->Version = IoStack->Parameters.QueryInterface.Version;
+        InterfaceHDA->Size = IoStack->Parameters.QueryInterface.Size;
+        InterfaceHDA->Context = DeviceExtension;
+
+        InterfaceHDA->TransferCodecVerbs = HDA_TransferCodecVerbs;
+        InterfaceHDA->AllocateCaptureDmaEngine = HDA_AllocateCaptureDmaEngine;
+        InterfaceHDA->AllocateRenderDmaEngine = HDA_AllocateRenderDmaEngine;
+        InterfaceHDA->ChangeBandwidthAllocation = HDA_ChangeBandwidthAllocation;
+        InterfaceHDA->AllocateDmaBuffer = HDA_AllocateDmaBuffer;
+        InterfaceHDA->FreeDmaBuffer = HDA_FreeDmaBuffer;
+        InterfaceHDA->FreeDmaEngine = HDA_FreeDmaEngine;
+        InterfaceHDA->SetDmaEngineState = HDA_SetDmaEngineState;
+        InterfaceHDA->GetWallClockRegister = HDA_GetWallClockRegister;
+        InterfaceHDA->GetLinkPositionRegister = HDA_GetLinkPositionRegister;
+        InterfaceHDA->RegisterEventCallback = HDA_RegisterEventCallback;
+        InterfaceHDA->UnregisterEventCallback = HDA_UnregisterEventCallback;
+        InterfaceHDA->GetDeviceInformation = HDA_GetDeviceInformation;
+        InterfaceHDA->GetResourceInformation = HDA_GetResourceInformation;
+
+        return STATUS_SUCCESS;
+    }
+
+    // FIXME
+    // implement support for GUID_HDAUDIO_BUS_INTERFACE_BDL, GUID_HDAUDIO_BUS_INTERFACE_V2
+    return STATUS_NOT_SUPPORTED;
 }