/*++

Copyright (C) Microsoft Corporation, 1996 - 1998

Module Name:

    mcd.h

Abstract:

    These are the structures and defines that are used in the
    changer class drivers. The changer class driver is separated
    into two modules. Mcd.c contains code common to all medium
    changer drivers including the driver's major entry points.

Author:

    chuckp (Chuck Park)

Environment:

    Kernel mode

Revision History :

--*/


#include "scsi.h"
#include "ntddchgr.h"
#include <classpnp.h>

#ifdef DebugPrint
#undef DebugPrint
#endif

#if DBG
#define DebugPrint(x) MCDebugPrint x
#else
#define DebugPrint(x)
#endif


VOID
MCDebugPrint(
    ULONG DebugPrintLevel,
    PCCHAR DebugMessage,
    ...
    );

#define MAXIMUM_CHANGER_INQUIRY_DATA 252

typedef struct _MODE_ELEMENT_ADDRESS_PAGE {

    UCHAR PageCode : 6;
    UCHAR Reserved1 : 1;
    UCHAR PS : 1;
    UCHAR PageLength;
    UCHAR MediumTransportElementAddress[2];
    UCHAR NumberTransportElements[2];
    UCHAR FirstStorageElementAddress[2];
    UCHAR NumberStorageElements[2];
    UCHAR FirstIEPortElementAddress[2];
    UCHAR NumberIEPortElements[2];
    UCHAR FirstDataXFerElementAddress[2];
    UCHAR NumberDataXFerElements[2];
    UCHAR Reserved2[2];

} MODE_ELEMENT_ADDRESS_PAGE, *PMODE_ELEMENT_ADDRESS_PAGE;

typedef struct _MODE_TRANSPORT_GEOMETRY_PAGE {

    UCHAR PageCode : 6;
    UCHAR Reserved1 : 1;
    UCHAR PS : 1;
    UCHAR PageLength;
    UCHAR Flip : 1;
    UCHAR Reserved2: 7;
    UCHAR TransportElementNumber;

} MODE_TRANSPORT_GEOMETRY_PAGE, *PMODE_TRANSPORT_GEOMETRY_PAGE;

//
// Capabilities page decribes the various functions that the device
// supports. Used in GetParameters.
//

typedef struct _MODE_DEVICE_CAPABILITIES_PAGE {

    UCHAR PageCode : 6;
    UCHAR Reserved1 : 1;
    UCHAR PS : 1;
    UCHAR PageLength;
    UCHAR MediumTransport : 1;
    UCHAR StorageLocation : 1;
    UCHAR IEPort : 1;
    UCHAR DataXFer : 1;
    UCHAR Reserved2 : 4;
    UCHAR Reserved3;
    UCHAR MTtoMT : 1;
    UCHAR MTtoST : 1;
    UCHAR MTtoIE : 1;
    UCHAR MTtoDT : 1;
    UCHAR Reserved4 : 4;
    UCHAR STtoMT : 1;
    UCHAR STtoST : 1;
    UCHAR STtoIE : 1;
    UCHAR STtoDT : 1;
    UCHAR Reserved5 : 4;
    UCHAR IEtoMT : 1;
    UCHAR IEtoST : 1;
    UCHAR IEtoIE : 1;
    UCHAR IEtoDT : 1;
    UCHAR Reserved6 : 4;
    UCHAR DTtoMT : 1;
    UCHAR DTtoST : 1;
    UCHAR DTtoIE : 1;
    UCHAR DTtoDT : 1;
    UCHAR Reserved7 : 4;
    UCHAR Reserved8[4];
    UCHAR XMTtoMT : 1;
    UCHAR XMTtoST : 1;
    UCHAR XMTtoIE : 1;
    UCHAR XMTtoDT : 1;
    UCHAR Reserved9 : 4;
    UCHAR XSTtoMT : 1;
    UCHAR XSTtoST : 1;
    UCHAR XSTtoIE : 1;
    UCHAR XSTtoDT : 1;
    UCHAR Reserved10 : 4;
    UCHAR XIEtoMT : 1;
    UCHAR XIEtoST : 1;
    UCHAR XIEtoIE : 1;
    UCHAR XIEtoDT : 1;
    UCHAR Reserved11 : 4;
    UCHAR XDTtoMT : 1;
    UCHAR XDTtoST : 1;
    UCHAR XDTtoIE : 1;
    UCHAR XDTtoDT : 1;
    UCHAR Reserved12 : 4;

} MODE_DEVICE_CAPABILITIES_PAGE, *PMODE_DEVICE_CAPABILITIES_PAGE;

#define MODE_PAGE_DISPLAY 0x22

//
// Structures describing return data from READ_ELEMENT_STATUS
//

typedef struct _ELEMENT_STATUS_HEADER {
    UCHAR FirstElementAddress[2];
    UCHAR NumberOfElements[2];
    UCHAR Reserved1;
    UCHAR ReportByteCount[3];
} ELEMENT_STATUS_HEADER, *PELEMENT_STATUS_HEADER;

typedef struct _ELEMENT_STATUS_PAGE {
    UCHAR ElementType;
    UCHAR Reserved1 : 6;
    UCHAR AVolTag : 1;
    UCHAR PVolTag : 1;
    UCHAR ElementDescriptorLength[2];
    UCHAR Reserved2;
    UCHAR DescriptorByteCount[3];
} ELEMENT_STATUS_PAGE, *PELEMENT_STATUS_PAGE;


typedef struct _ELEMENT_DESCRIPTOR {
        UCHAR ElementAddress[2];
        UCHAR Full : 1;
        UCHAR Reserved1 : 1;
        UCHAR Exception : 1;
        UCHAR Accessible : 1;
        UCHAR Reserved2 : 4;
        UCHAR Reserved3;
        UCHAR AdditionalSenseCode;
        UCHAR AddSenseCodeQualifier;
        UCHAR Lun : 3;
        UCHAR Reserved4 : 1;
        UCHAR LunValid : 1;
        UCHAR IdValid : 1;
        UCHAR Reserved5 : 1;
        UCHAR NotThisBus : 1;
        UCHAR BusAddress;
        UCHAR Reserved6;
        UCHAR Reserved7 : 6;
        UCHAR Invert : 1;
        UCHAR SValid : 1;
        UCHAR SourceStorageElementAddress[2];
} ELEMENT_DESCRIPTOR, *PELEMENT_DESCRIPTOR;


//
// The following routines are the exported entry points for
// all changer class drivers.
//

NTSTATUS
DriverEntry(
    IN PDRIVER_OBJECT DriverObject,
    IN PUNICODE_STRING RegistryPath
    );

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

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

PVOID
ChangerClassAllocatePool(
    IN POOL_TYPE PoolType,
    IN ULONG NumberOfBytes
    );

VOID
ChangerClassFreePool(
    IN PVOID PoolToFree
    );

NTSTATUS
ChangerClassSendSrbSynchronous(
    IN PDEVICE_OBJECT DeviceObject,
    IN PSCSI_REQUEST_BLOCK Srb,
    IN PVOID Buffer,
    IN ULONG BufferSize,
    IN BOOLEAN WriteToDevice
    );


//
// The following routines are provided by the changer
// device-specific module. Each routine name is
// prefixed with 'Changer.'


ULONG
ChangerAdditionalExtensionSize(
    VOID
    );

BOOLEAN
ChangerVerifyInquiry(
    PINQUIRYDATA InquiryData
    );

NTSTATUS
ChangerInitialize(
    IN PDEVICE_OBJECT DeviceObject
    );

VOID
ChangerError(
    PDEVICE_OBJECT DeviceObject,
    PSCSI_REQUEST_BLOCK Srb,
    NTSTATUS *Status,
    BOOLEAN *Retry
    );

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

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

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

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

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


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

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

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

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

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

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