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121 lines
3 KiB
C++
121 lines
3 KiB
C++
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Kernel Streaming
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* FILE: drivers/wdm/audio/backpln/portcls/power.cpp
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* PURPOSE: Power support functions
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* PROGRAMMER: Johannes Anderwald
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*/
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#include "private.hpp"
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#ifndef YDEBUG
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#define NDEBUG
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#endif
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#include <debug.h>
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NTSTATUS
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NTAPI
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PcRegisterAdapterPowerManagement(
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IN PUNKNOWN pUnknown,
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IN PVOID pvContext)
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{
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NTSTATUS Status;
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PDEVICE_OBJECT pDeviceObject;
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PPCLASS_DEVICE_EXTENSION DeviceExt;
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IAdapterPowerManagement * pPower;
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DPRINT("PcRegisterAdapterPowerManagement pUnknown %p pvContext %p\n", pUnknown, pvContext);
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PC_ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
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if (!pUnknown || !pvContext)
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return STATUS_INVALID_PARAMETER;
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pDeviceObject = (PDEVICE_OBJECT)pvContext;
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DeviceExt = (PPCLASS_DEVICE_EXTENSION)pDeviceObject->DeviceExtension;
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Status = pUnknown->QueryInterface(IID_IAdapterPowerManagement, (PVOID*)&pPower);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("PcRegisterAdapterPowerManagement no IAdapterPowerManagement interface %x\n", Status);
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DeviceExt->AdapterPowerManagement = NULL;
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return STATUS_SUCCESS;
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}
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DeviceExt->AdapterPowerManagement = pPower;
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DPRINT("PcRegisterAdapterPowerManagement success %x\n", Status);
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return STATUS_SUCCESS;
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}
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NTSTATUS
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NTAPI
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PcUnregisterAdapterPowerManagement(
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IN PDEVICE_OBJECT DeviceObject)
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{
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PPCLASS_DEVICE_EXTENSION DeviceExt;
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DPRINT("PcUnregisterAdapterPowerManagement pUnknown %p pvContext %p\n", DeviceObject);
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PC_ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
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if (!DeviceObject)
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return STATUS_INVALID_PARAMETER;
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DeviceExt = (PPCLASS_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
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if (DeviceExt->AdapterPowerManagement)
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{
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DeviceExt->AdapterPowerManagement->Release();
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}
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DeviceExt->AdapterPowerManagement = NULL;
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return STATUS_SUCCESS;
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}
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static
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VOID
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NTAPI
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PwrCompletionCallback(
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IN PDEVICE_OBJECT DeviceObject,
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IN UCHAR MinorFunction,
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IN POWER_STATE PowerState,
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IN PVOID Context,
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IN PIO_STATUS_BLOCK IoStatus)
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{
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KeSetEvent((PRKEVENT)Context, IO_NO_INCREMENT, FALSE);
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}
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NTSTATUS
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NTAPI
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PcRequestNewPowerState(
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IN PDEVICE_OBJECT DeviceObject,
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IN DEVICE_POWER_STATE RequestedNewState)
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{
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KEVENT Event;
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NTSTATUS Status;
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POWER_STATE PowerState;
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PPCLASS_DEVICE_EXTENSION DeviceExt;
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PC_ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
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if (!DeviceObject || !RequestedNewState)
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return STATUS_INVALID_PARAMETER;
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DeviceExt = (PPCLASS_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
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KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
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PowerState.DeviceState = RequestedNewState;
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PowerState.SystemState = PowerSystemUnspecified;
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Status = PoRequestPowerIrp(DeviceExt->PhysicalDeviceObject, IRP_MN_SET_POWER, PowerState, PwrCompletionCallback, (PVOID)&Event, NULL);
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if (NT_SUCCESS(Status))
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{
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KeWaitForSingleObject((PVOID)&Event, Executive, KernelMode, FALSE, NULL);
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}
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return Status;
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}
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