164 lines
3.1 KiB
C
164 lines
3.1 KiB
C
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/*++
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Copyright (c) 1998 Microsoft Corporation
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Module Name:
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serscan.c
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Abstract:
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This module contains the code for a serial imaging devices driver
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Open and Create routines
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Author:
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Vlad Sadovsky vlads 10-April-1998
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Environment:
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Kernel mode
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Revision History :
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vlads 04/10/1998 Created first draft
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--*/
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#include "serscan.h"
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#include "serlog.h"
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#if DBG
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extern ULONG SerScanDebugLevel;
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#endif
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NTSTATUS
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SerScanCreateOpen(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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)
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/*++
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Routine Description:
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This routine is the dispatch for a create requests.
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Arguments:
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DeviceObject - Supplies the device object.
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Irp - Supplies the I/O request packet.
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Return Value:
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STATUS_SUCCESS - Success.
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!STATUS_SUCCESS - Failure.
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--*/
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{
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NTSTATUS Status;
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PDEVICE_EXTENSION Extension;
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PIO_STACK_LOCATION IrpSp;
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PFILE_OBJECT FileObject;
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PAGED_CODE();
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Extension = DeviceObject->DeviceExtension;
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//
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// From the FileObject determine what mode we are running in.
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//
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// If FileObject->DeviceObject == DeviceObject, the user opened our device
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// and we will process each of the callbacks (Filter mode).
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//
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// If FileObject->DeviceObject != DeviceObject, the user opened PORTx
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// and we will get out of the way (PassThrough mode).
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//
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IrpSp = IoGetCurrentIrpStackLocation (Irp);
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FileObject = IrpSp->FileObject;
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// ASSERT (FileObject == NULL);
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//
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// Are the DeviceObjects equal...
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//
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Extension->PassThrough = !(FileObject->DeviceObject == DeviceObject);
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//
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// Call down to the parent and wait on the CreateOpen IRP to complete...
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//
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Status = SerScanCallParent(Extension,
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Irp,
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WAIT,
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NULL);
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DebugDump(SERIRPPATH,
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("SerScan: [CreateOpen] After CallParent Status = %x\n",
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Status));
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//
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// WORKWORK: If we are in filter mode, we'll connect here...
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//
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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return Status;
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}
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NTSTATUS
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SerScanClose(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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)
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/*++
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Routine Description:
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This routine is the dispatch for a close requests.
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Arguments:
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DeviceObject - Supplies the device object.
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Irp - Supplies the I/O request packet.
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Return Value:
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STATUS_SUCCESS - Success.
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--*/
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{
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NTSTATUS Status;
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PDEVICE_EXTENSION Extension;
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PAGED_CODE();
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Extension = DeviceObject->DeviceExtension;
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//
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// Call down to the parent and wait on the Close IRP to complete...
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//
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Status = SerScanCallParent(Extension,
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Irp,
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WAIT,
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NULL);
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DebugDump(SERIRPPATH,
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("SerScan: [Close] After CallParent Status = %x\n",
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Status));
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//
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// WORKWORK: If we are in filter mode we need to disconnect here...
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//
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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return Status;
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}
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