134 lines
4.6 KiB
C
134 lines
4.6 KiB
C
/***************************************************************************
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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Dot4Usb.sys - Lower Filter Driver for Dot4.sys for USB connected
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IEEE 1284.4 devices.
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File Name:
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AddDev.c
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Abstract:
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AddDevice - Create and initialize device object and attach device
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object to the device stack.
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Environment:
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Kernel mode only
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Notes:
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THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
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KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
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PURPOSE.
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Copyright (c) 2000 Microsoft Corporation. All Rights Reserved.
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Revision History:
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01/18/2000 : created
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ToDo in this File:
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Author(s):
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Doug Fritz (DFritz)
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Joby Lafky (JobyL)
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****************************************************************************/
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#include "pch.h"
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/************************************************************************/
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/* AddDevice */
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/************************************************************************/
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//
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// Routine Description:
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//
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// Create and initialize device object and attach device
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// object to the device stack.
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//
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// Arguments:
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//
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// DriverObject - pointer to Dot4Usb.sys driver object
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// Pdo - pointer to the PDO of the device stack that
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// we attach our device object to
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//
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// Return Value:
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//
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// NTSTATUS
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//
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// Log:
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// 2000-05-03 Code Reviewed - TomGreen, JobyL, DFritz
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//
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/************************************************************************/
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NTSTATUS
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AddDevice(
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IN PDRIVER_OBJECT DriverObject,
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IN PDEVICE_OBJECT Pdo
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)
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{
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PDEVICE_OBJECT devObj;
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NTSTATUS status = IoCreateDevice( DriverObject,
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sizeof(DEVICE_EXTENSION),
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NULL, // no name
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FILE_DEVICE_UNKNOWN,
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FILE_DEVICE_SECURE_OPEN,
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FALSE, // not exclusive
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&devObj );
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if( NT_SUCCESS(status) ) {
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PDEVICE_OBJECT lowerDevObj = IoAttachDeviceToDeviceStack( devObj, Pdo );
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if( lowerDevObj ) {
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PDEVICE_EXTENSION devExt = (PDEVICE_EXTENSION)devObj->DeviceExtension;
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RtlZeroMemory(devExt, sizeof(DEVICE_EXTENSION));
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devExt->LowerDevObj = lowerDevObj; // send IRPs to this device
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devExt->Signature1 = DOT4USBTAG; // constant over the lifetime of object
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devExt->Signature2 = DOT4USBTAG;
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devExt->PnpState = STATE_INITIALIZED;
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devExt->DevObj = devObj;
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devExt->Pdo = Pdo;
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devExt->ResetWorkItemPending=0;
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devExt->SystemPowerState = PowerSystemWorking;
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devExt->DevicePowerState = PowerDeviceD0;
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devExt->CurrentPowerIrp = NULL;
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IoInitializeRemoveLock( &devExt->RemoveLock,
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DOT4USBTAG,
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5, // MaxLockedMinutes - only used on chk'd builds
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255 ); // HighWaterMark - only used on chk'd builds
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KeInitializeSpinLock( &devExt->SpinLock );
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KeInitializeEvent( &devExt->PollIrpEvent, NotificationEvent, FALSE );
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devObj->Flags |= DO_DIRECT_IO;
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devObj->Flags |= ( devExt->LowerDevObj->Flags & DO_POWER_PAGABLE );
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devObj->Flags &= ~DO_DEVICE_INITIALIZING; // DO_POWER_PAGABLE must be set appropriately
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// before clearing this bit to avoid a bugcheck
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} else {
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TR_FAIL(("AddDevice - IoAttachDeviceToDeviceStack - FAIL"));
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status = STATUS_UNSUCCESSFUL; // for lack of a more appropriate status code
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}
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} else {
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TR_FAIL(("AddDevice - IoCreateDevice - FAIL - status= %x", status));
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}
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return status;
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}
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