NTSTATUS FdoPortImmediateChar(
IN PC0C_IO_PORT pIoPort,
IN PIRP pIrp,
IN PIO_STACK_LOCATION pIrpStack)
{
if (pIrpStack->Parameters.DeviceIoControl.InputBufferLength < sizeof(UCHAR))
return STATUS_BUFFER_TOO_SMALL;
return FdoPortStartIrp(pIoPort, pIrp, C0C_QUEUE_WRITE, StartIrpWrite);
}
NTSTATUS FdoPortXoffCounter(
IN PC0C_IO_PORT pIoPort,
IN PIRP pIrp,
IN PIO_STACK_LOCATION pIrpStack)
{
PSERIAL_XOFF_COUNTER pXoffCounter;
if (pIrpStack->Parameters.DeviceIoControl.InputBufferLength < sizeof(SERIAL_XOFF_COUNTER))
return STATUS_BUFFER_TOO_SMALL;
pXoffCounter = (PSERIAL_XOFF_COUNTER)pIrp->AssociatedIrp.SystemBuffer;
if (pXoffCounter->Counter <= 0)
return STATUS_INVALID_PARAMETER;
return FdoPortStartIrp(pIoPort, pIrp, C0C_QUEUE_WRITE, StartIrpWrite);
}
NTSTATUS FdoPortClose(IN PC0C_FDOPORT_EXTENSION pDevExt, IN PIRP pIrp)
{
NTSTATUS status;
LIST_ENTRY queueToComplete;
KIRQL oldIrql;
PC0C_IO_PORT pIoPort;
pIoPort = pDevExt->pIoPortLocal;
pIoPort->isOpen = FALSE;
if (pIoPort->pIoPortRemote->plugInMode)
IoInvalidateDeviceRelations(pIoPort->pIoPortRemote->pPhDevObj, BusRelations);
InitializeListHead(&queueToComplete);
KeAcquireSpinLock(pIoPort->pIoLock, &oldIrql);
pIoPort->escapeChar = 0;
pIoPort->writeHoldingRemote = 0;
pIoPort->sendXonXoff = 0;
SetModemControl(pIoPort, C0C_MCR_OUT2, C0C_MCR_MASK | C0C_MCR_OPEN, &queueToComplete);
FreeBuffer(&pIoPort->readBuf);
SetBreakHolding(pIoPort, FALSE, &queueToComplete);
KeReleaseSpinLock(pIoPort->pIoLock, oldIrql);
FdoPortCompleteQueue(&queueToComplete);
status = FdoPortStartIrp(pIoPort, pIrp, C0C_QUEUE_CLOSE, StartIrpClose);
if (status != STATUS_PENDING) {
pIrp->IoStatus.Status = status;
IoCompleteRequest(pIrp, IO_NO_INCREMENT);
}
return status;
}
NTSTATUS FdoPortWrite(IN PC0C_IO_PORT pIoPort, IN PIRP pIrp)
{
NTSTATUS status;
pIrp->IoStatus.Information = 0;
if ((pIoPort->handFlow.ControlHandShake & SERIAL_ERROR_ABORT) && pIoPort->errors) {
status = STATUS_CANCELLED;
} else {
if (IoGetCurrentIrpStackLocation(pIrp)->MajorFunction == IRP_MJ_FLUSH_BUFFERS ||
IoGetCurrentIrpStackLocation(pIrp)->Parameters.Write.Length)
status = FdoPortStartIrp(pIoPort, pIrp, C0C_QUEUE_WRITE, StartIrpWrite);
else
status = STATUS_SUCCESS;
}
if (status != STATUS_PENDING) {
TraceIrp("FdoPortWrite", pIrp, &status, TRACE_FLAG_RESULTS);
pIrp->IoStatus.Status = status;
IoCompleteRequest(pIrp, IO_NO_INCREMENT);
}
return status;
}
