/*++
Copyright (c) 1997  Microsoft Corporation

Module Name:

    moufiltr.h

Abstract:

    This module contains the common private declarations for the mouse
    packet filter

Environment:

    kernel mode only

Notes:


Revision History:


--*/

#ifndef MOUFILTER_H
#define MOUFILTER_H

#include "ntddk.h"
#include "kbdmou.h"
#include <ntddmou.h>
#include <ntdd8042.h>

#define MOUFILTER_POOL_TAG (ULONG) 'tlFM'
#undef ExAllocatePool
#define ExAllocatePool(type, size) \
            ExAllocatePoolWithTag (type, size, MOUFILTER_POOL_TAG)

#if DBG

#define TRAP()                      DbgBreakPoint()
#define DbgRaiseIrql(_x_,_y_)       KeRaiseIrql(_x_,_y_)
#define DbgLowerIrql(_x_)           KeLowerIrql(_x_)

#else   // DBG

#define TRAP()
#define DbgRaiseIrql(_x_,_y_)
#define DbgLowerIrql(_x_)

#endif

typedef struct _DEVICE_EXTENSION
{
    //
    // A backpointer to the device object for which this is the extension
    //
    PDEVICE_OBJECT  Self;

    //
    // "THE PDO"  (ejected by the bus)
    //
    PDEVICE_OBJECT  PDO;

    //
    // The top of the stack before this filter was added.  AKA the location
    // to which all IRPS should be directed.
    //
    PDEVICE_OBJECT  TopOfStack;

    //
    // Number of creates sent down
    //
    LONG EnableCount;

    //
    // Previous hook routine and context
    //                               
    PVOID UpperContext;
    PI8042_MOUSE_ISR UpperIsrHook;

    //
    // Write to the mouse in the context of MouFilter_IsrHook
    //
    IN PI8042_ISR_WRITE_PORT IsrWritePort;

    //
    // Context for IsrWritePort, QueueMousePacket
    //
    IN PVOID CallContext;

    //
    // Queue the current packet (ie the one passed into MouFilter_IsrHook)
    // to be reported to the class driver
    //
    IN PI8042_QUEUE_PACKET QueueMousePacket;

    //
    // The real connect data that this driver reports to
    //
    CONNECT_DATA UpperConnectData;

    //
    // current power state of the device
    //
    DEVICE_POWER_STATE  DeviceState;

    //
    // State of the stack and this device object
    //
    BOOLEAN Started;
    BOOLEAN SurpriseRemoved;
    BOOLEAN Removed;

} DEVICE_EXTENSION, *PDEVICE_EXTENSION;

//
// Prototypes
//

NTSTATUS
MouFilter_AddDevice(
    IN PDRIVER_OBJECT DriverObject,
    IN PDEVICE_OBJECT BusDeviceObject
    );

NTSTATUS
MouFilter_CreateClose (
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp
    );

NTSTATUS
MouFilter_DispatchPassThrough(
        IN PDEVICE_OBJECT DeviceObject,
        IN PIRP Irp
        );
   
NTSTATUS
MouFilter_InternIoCtl (
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp
    );

NTSTATUS
MouFilter_IoCtl (
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp
    );

NTSTATUS
MouFilter_PnP (
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp
    );

NTSTATUS
MouFilter_Power (
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp
    );

BOOLEAN
MouFilter_IsrHook (
    PDEVICE_OBJECT          DeviceObject, 
    PMOUSE_INPUT_DATA       CurrentInput, 
    POUTPUT_PACKET          CurrentOutput,
    UCHAR                   StatusByte,
    PUCHAR                  DataByte,
    PBOOLEAN                ContinueProcessing,
    PMOUSE_STATE            MouseState,
    PMOUSE_RESET_SUBSTATE   ResetSubState
);

VOID
MouFilter_ServiceCallback(
    IN PDEVICE_OBJECT DeviceObject,
    IN PMOUSE_INPUT_DATA InputDataStart,
    IN PMOUSE_INPUT_DATA InputDataEnd,
    IN OUT PULONG InputDataConsumed
    );

VOID
MouFilter_Unload (
    IN PDRIVER_OBJECT DriverObject
    );

#endif  // MOUFILTER_H