mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
150 lines
5.5 KiB
150 lines
5.5 KiB
/***************************************************************************
|
|
|
|
Copyright (c) 2000 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
Dot4Usb.sys - Lower Filter Driver for Dot4.sys for USB connected
|
|
IEEE 1284.4 devices.
|
|
|
|
File Name:
|
|
|
|
DevExt.h
|
|
|
|
Abstract:
|
|
|
|
Defines, Globals, Structures, Enums, and Device Extension
|
|
|
|
Environment:
|
|
|
|
Kernel mode only
|
|
|
|
Notes:
|
|
|
|
THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
|
|
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
|
|
PURPOSE.
|
|
|
|
Copyright (c) 2000 Microsoft Corporation. All Rights Reserved.
|
|
|
|
Revision History:
|
|
|
|
01/18/2000 : created
|
|
|
|
Author(s):
|
|
|
|
Doug Fritz (DFritz)
|
|
Joby Lafky (JobyL)
|
|
|
|
****************************************************************************/
|
|
|
|
#ifndef _DEVEXT_H_
|
|
#define _DEVEXT_H_
|
|
|
|
//
|
|
// Defines
|
|
//
|
|
|
|
#define arraysize(p) (sizeof(p)/sizeof((p)[0])) // number of elements in an array
|
|
#define FAILURE_TIMEOUT -(30 * 10 * 1000 * 1000)// 5 seconds (in 100ns units) - used for KeWaitForSingleObject timeout
|
|
#define DOT4USBTAG (ULONG)' u4d' // Used as PoolTag and Device Extension Signature
|
|
#define SCRATCH_BUFFER_SIZE 512 // buffer size for reading from Interrupt pipe
|
|
|
|
#ifdef ExAllocatePool // use pool tagging
|
|
#undef ExAllocatePool
|
|
#define ExAllocatePool(type, size) ExAllocatePoolWithTag((type), (size), DOT4USBTAG)
|
|
#endif
|
|
|
|
|
|
|
|
//
|
|
// Globals
|
|
//
|
|
|
|
extern UNICODE_STRING gRegistryPath; // copy of RegistryPath passed to DriverEntry - Buffer is UNICODE_NULL terminated for flexibilty
|
|
extern ULONG gTrace; // events to trace - see debug.h
|
|
extern ULONG gBreak; // events that we should break on - see debug.h
|
|
|
|
|
|
|
|
//
|
|
// Structs (other than Device Extension)
|
|
//
|
|
|
|
typedef struct _USB_RW_CONTEXT { // Used to pass context to IRP Completion Routine
|
|
PURB Urb;
|
|
BOOLEAN IsWrite;
|
|
PDEVICE_OBJECT DevObj;
|
|
} USB_RW_CONTEXT, *PUSB_RW_CONTEXT;
|
|
|
|
|
|
|
|
//
|
|
// Enums
|
|
//
|
|
|
|
typedef enum _USB_REQUEST_TYPE { // Flag used to distinguish Reads from Writes in UsbReadWrite()
|
|
UsbReadRequest = 1,
|
|
UsbWriteRequest = 2
|
|
} USB_REQUEST_TYPE;
|
|
|
|
typedef enum _PNP_STATE { // PnP Device States
|
|
STATE_INITIALIZED,
|
|
STATE_STARTING,
|
|
STATE_STARTED,
|
|
STATE_START_FAILED,
|
|
STATE_STOPPED, // implies device was previously started successfully
|
|
STATE_SUSPENDED,
|
|
STATE_REMOVING,
|
|
STATE_REMOVED
|
|
} PNP_STATE;
|
|
|
|
|
|
|
|
//
|
|
// Device Extension
|
|
//
|
|
|
|
typedef struct _DEVICE_EXTENSION {
|
|
ULONG Signature1; // extra check that devExt looks like ours - DOT4USBTAG
|
|
PDEVICE_OBJECT DevObj; // back pointer to our DeviceObject
|
|
PDEVICE_OBJECT Pdo; // our PDO
|
|
PDEVICE_OBJECT LowerDevObj; // Device Object returned by IoAttachDeviceToDeviceStack that we send IRPs to
|
|
PNP_STATE PnpState; // PnP device state
|
|
BOOLEAN IsDLConnected; // is our datalink connected? i.e., between PARDOT3_ CONNECT and DISCONNECT?
|
|
UCHAR Spare1[3]; // pad to DWORD boundary
|
|
PKEVENT Dot4Event; // datalink event - given to us by dot4.sys to signal when device data avail
|
|
USBD_CONFIGURATION_HANDLE ConfigHandle; // handle for the configuration the device is currently in
|
|
PUSB_DEVICE_DESCRIPTOR DeviceDescriptor; // ptr to the USB device descriptor for this device
|
|
PUSBD_INTERFACE_INFORMATION Interface; // copy of the info structure returned from select_configuration or select_interface
|
|
PUSBD_PIPE_INFORMATION WritePipe; // pipe for bulk writes
|
|
PUSBD_PIPE_INFORMATION ReadPipe; // pipe for bulk reads
|
|
PUSBD_PIPE_INFORMATION InterruptPipe; // pipe for interrupt reads
|
|
KSPIN_LOCK SpinLock; // SpinLock to protect extension data
|
|
PIRP PollIrp; // irp used for polling device interrupt pipe for device data avail
|
|
KSPIN_LOCK PollIrpSpinLock; // SpinLock used to protect changes to Polling Irp for Interrupt Pipe
|
|
KEVENT PollIrpEvent; // used by completion routine to signal that cancel of pollIrp has been detected/handled
|
|
UCHAR Spare2[3]; // pad to DWORD boundary
|
|
DEVICE_CAPABILITIES DeviceCapabilities; // includes a table mapping system power states to device power states.
|
|
IO_REMOVE_LOCK RemoveLock; // Synch mechanism to keep us from being removed while we have IRPs active
|
|
LONG ResetWorkItemPending;// flag to specify if a "reset pipe" work item is pending
|
|
ULONG Signature2; // extra check that devExt looks like ours - DOT4USBTAG
|
|
PUSB_RW_CONTEXT InterruptContext; // context for read on interrupt pipe
|
|
SYSTEM_POWER_STATE SystemPowerState;
|
|
DEVICE_POWER_STATE DevicePowerState;
|
|
PIRP CurrentPowerIrp;
|
|
|
|
} DEVICE_EXTENSION, *PDEVICE_EXTENSION;
|
|
|
|
typedef struct _DOT4USB_WORKITEM_CONTEXT
|
|
{
|
|
PIO_WORKITEM ioWorkItem;
|
|
PDEVICE_OBJECT deviceObject;
|
|
PUSBD_PIPE_INFORMATION pPipeInfo;
|
|
PIRP irp;
|
|
|
|
} DOT4USB_WORKITEM_CONTEXT,*PDOT4USB_WORKITEM_CONTEXT;
|
|
|
|
|
|
#endif // _DEVEXT_H_
|