NTSTATUS
EvtDeviceD0Exit(
IN WDFDEVICE Device,
IN WDF_POWER_DEVICE_STATE TargetState
)
{
NTSTATUS status = STATUS_SUCCESS;
PDEVICE_CONTEXT devCtx = NULL;
devCtx = GetDeviceContext(Device);
KdPrint((__DRIVER_NAME "Device D0 Exit. Going to %s\n",
PowerName(TargetState)));
/*Save the state of the LED array if the device is waking up from a
D3 power state.*/
if(TargetState == PowerDeviceD3)
{
status = llGetLightBar(devCtx, devCtx->WdfMemLEDArrayState);
if(!NT_SUCCESS(status))
return status;
}
// Dung viec gui gui cac lenh dang pending qua ong interrupt
WdfIoTargetStop(WdfUsbTargetPipeGetIoTarget(devCtx->UsbInterruptPipe),
WdfIoTargetLeaveSentIoPending);
return status;
}
NTSTATUS
EvtDeviceD0Entry(
IN WDFDEVICE Device,
IN WDF_POWER_DEVICE_STATE PreviousState
)
{
NTSTATUS status = STATUS_SUCCESS;
PDEVICE_CONTEXT devCtx = NULL;
KdPrint((__DRIVER_NAME "Device D0 Entry. Coming from %s\n",
PowerName(PreviousState)));
devCtx = GetDeviceContext(Device); // Get device context
// Khoi dong Pipes
status = WdfIoTargetStart(WdfUsbTargetPipeGetIoTarget(devCtx->UsbInterruptPipe));
if(!NT_SUCCESS(status))
{
KdPrint((__DRIVER_NAME
"WdfIoTargetStart failed with status 0x%08x\n", status));
return status;
}
/*Restore the state of the LED array if the device is waking up from a
D3 power state.*/
if(PreviousState == PowerDeviceD3)
{
status = llSetLightBar(devCtx, devCtx->WdfMemLEDArrayState);
}
return status;
}
// 离开D0状态
NTSTATUS DrvClass::PwrD0Exit(IN WDF_POWER_DEVICE_STATE TargetState)
{
KDBG(DPFLTR_INFO_LEVEL, "[PwrD0Exit] to %s", PowerName(TargetState));
return STATUS_SUCCESS;
}
//下面两个Power回调，和WDM中的PnpSetPower类似。
NTSTATUS DrvClass::PwrD0Entry(IN WDF_POWER_DEVICE_STATE PreviousState)
{
KDBG(DPFLTR_INFO_LEVEL, "[PwrD0Entry] from %s", PowerName(PreviousState));
return STATUS_SUCCESS;
}
