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/*

 * linux/mtio.h header file for Linux. Written by H. Bergman

 *

 * Modified for special ioctls provided by zftape in September 1997

 * by C.-J. Heine.

 */

#ifndef _LINUX_MTIO_H

#define _LINUX_MTIO_H

#include <linux/types.h>

#include <linux/ioctl.h>

/*

 * Structures and definitions for mag tape io control commands

 */

/* structure for MTIOCTOP - mag tape op command */

struct  mtop {

        short   mt_op;          /* operations defined below */

        int     mt_count;       /* how many of them */

};

/* Magnetic Tape operations [Not all operations supported by all drivers]: */

#define MTRESET 0       /* +reset drive in case of problems */

#define MTFSF   1       /* forward space over FileMark,

                         * position at first record of next file

                         */

#define MTBSF   2       /* backward space FileMark (position before FM) */

#define MTFSR   3       /* forward space record */

#define MTBSR   4       /* backward space record */

#define MTWEOF  5       /* write an end-of-file record (mark) */

#define MTREW   6       /* rewind */

#define MTOFFL  7       /* rewind and put the drive offline (eject?) */

#define MTNOP   8       /* no op, set status only (read with MTIOCGET) */

#define MTRETEN 9       /* retension tape */

#define MTBSFM  10      /* +backward space FileMark, position at FM */

#define MTFSFM  11      /* +forward space FileMark, position at FM */

#define MTEOM   12      /* goto end of recorded media (for appending files).

                         * MTEOM positions after the last FM, ready for

                         * appending another file.

                         */

#define MTERASE 13      /* erase tape -- be careful! */

#define MTRAS1  14      /* run self test 1 (nondestructive) */

#define MTRAS2  15      /* run self test 2 (destructive) */

#define MTRAS3  16      /* reserved for self test 3 */

#define MTSETBLK 20     /* set block length (SCSI) */

#define MTSETDENSITY 21 /* set tape density (SCSI) */

#define MTSEEK  22      /* seek to block (Tandberg, etc.) */

#define MTTELL  23      /* tell block (Tandberg, etc.) */

#define MTSETDRVBUFFER 24 /* set the drive buffering according to SCSI-2 */

                        /* ordinary buffered operation with code 1 */

#define MTFSS   25      /* space forward over setmarks */

#define MTBSS   26      /* space backward over setmarks */

#define MTWSM   27      /* write setmarks */

#define MTLOCK  28      /* lock the drive door */

#define MTUNLOCK 29     /* unlock the drive door */

#define MTLOAD  30      /* execute the SCSI load command */

#define MTUNLOAD 31     /* execute the SCSI unload command */

#define MTCOMPRESSION 32/* control compression with SCSI mode page 15 */

#define MTSETPART 33    /* Change the active tape partition */

#define MTMKPART  34    /* Format the tape with one or two partitions */

/* structure for MTIOCGET - mag tape get status command */

struct  mtget {

        long    mt_type;        /* type of magtape device */

        long    mt_resid;       /* residual count: (not sure)

                                 *      number of bytes ignored, or

                                 *      number of files not skipped, or

                                 *      number of records not skipped.

                                 */

        /* the following registers are device dependent */

        long    mt_dsreg;       /* status register */

        long    mt_gstat;       /* generic (device independent) status */

        long    mt_erreg;       /* error register */

        /* The next two fields are not always used */

        __kernel_daddr_t mt_fileno;     /* number of current file on tape */

        __kernel_daddr_t mt_blkno;      /* current block number */

};

/*

 * Constants for mt_type. Not all of these are supported,

 * and these are not all of the ones that are supported.

 */

#define MT_ISUNKNOWN            0x01

#define MT_ISQIC02              0x02    /* Generic QIC-02 tape streamer */

#define MT_ISWT5150             0x03    /* Wangtek 5150EQ, QIC-150, QIC-02 */

#define MT_ISARCHIVE_5945L2     0x04    /* Archive 5945L-2, QIC-24, QIC-02? */

#define MT_ISCMSJ500            0x05    /* CMS Jumbo 500 (QIC-02?) */

#define MT_ISTDC3610            0x06    /* Tandberg 6310, QIC-24 */

#define MT_ISARCHIVE_VP60I      0x07    /* Archive VP60i, QIC-02 */

#define MT_ISARCHIVE_2150L      0x08    /* Archive Viper 2150L */

#define MT_ISARCHIVE_2060L      0x09    /* Archive Viper 2060L */

#define MT_ISARCHIVESC499       0x0A    /* Archive SC-499 QIC-36 controller */

#define MT_ISQIC02_ALL_FEATURES 0x0F    /* Generic QIC-02 with all features */

#define MT_ISWT5099EEN24        0x11    /* Wangtek 5099-een24, 60MB, QIC-24 */

#define MT_ISTEAC_MT2ST         0x12    /* Teac MT-2ST 155mb drive, Teac DC-1 card (Wangtek type) */

#define MT_ISEVEREX_FT40A       0x32    /* Everex FT40A (QIC-40) */

#define MT_ISDDS1               0x51    /* DDS device without partitions */

#define MT_ISDDS2               0x52    /* DDS device with partitions */

#define MT_ISONSTREAM_SC        0x61   /* OnStream SCSI tape drives (SC-x0)

                                          and SCSI emulated (DI, DP, USB) */

#define MT_ISSCSI1              0x71    /* Generic ANSI SCSI-1 tape unit */

#define MT_ISSCSI2              0x72    /* Generic ANSI SCSI-2 tape unit */

/* QIC-40/80/3010/3020 ftape supported drives.

 * 20bit vendor ID + 0x800000 (see ftape-vendors.h)

 */

#define MT_ISFTAPE_UNKNOWN      0x800000 /* obsolete */

#define MT_ISFTAPE_FLAG 0x800000

/* structure for MTIOCPOS - mag tape get position command */

struct  mtpos {

        long    mt_blkno;       /* current block number */

};

/* mag tape io control commands */

#define MTIOCTOP        _IOW('m', 1, struct mtop)       /* do a mag tape op */

#define MTIOCGET        _IOR('m', 2, struct mtget)      /* get tape status */

#define MTIOCPOS        _IOR('m', 3, struct mtpos)      /* get tape position */

/* Generic Mag Tape (device independent) status macros for examining

 * mt_gstat -- HP-UX compatible.

 * There is room for more generic status bits here, but I don't

 * know which of them are reserved. At least three or so should

 * be added to make this really useful.

 */

#define GMT_EOF(x)              ((x) & 0x80000000)

#define GMT_BOT(x)              ((x) & 0x40000000)

#define GMT_EOT(x)              ((x) & 0x20000000)

#define GMT_SM(x)               ((x) & 0x10000000)  /* DDS setmark */

#define GMT_EOD(x)              ((x) & 0x08000000)  /* DDS EOD */

#define GMT_WR_PROT(x)          ((x) & 0x04000000)

/* #define GMT_ ?               ((x) & 0x02000000) */

#define GMT_ONLINE(x)           ((x) & 0x01000000)

#define GMT_D_6250(x)           ((x) & 0x00800000)

#define GMT_D_1600(x)           ((x) & 0x00400000)

#define GMT_D_800(x)            ((x) & 0x00200000)

/* #define GMT_ ?               ((x) & 0x00100000) */

/* #define GMT_ ?               ((x) & 0x00080000) */

#define GMT_DR_OPEN(x)          ((x) & 0x00040000)  /* door open (no tape) */

/* #define GMT_ ?               ((x) & 0x00020000) */

#define GMT_IM_REP_EN(x)        ((x) & 0x00010000)  /* immediate report mode */

#define GMT_CLN(x)              ((x) & 0x00008000)  /* cleaning requested */

/* 15 generic status bits unused */

/* SCSI-tape specific definitions */

/* Bitfield shifts in the status  */

#define MT_ST_BLKSIZE_SHIFT     0

#define MT_ST_BLKSIZE_MASK      0xffffff

#define MT_ST_DENSITY_SHIFT     24

#define MT_ST_DENSITY_MASK      0xff000000

#define MT_ST_SOFTERR_SHIFT     0

#define MT_ST_SOFTERR_MASK      0xffff

/* Bitfields for the MTSETDRVBUFFER ioctl */

#define MT_ST_OPTIONS           0xf0000000

#define MT_ST_BOOLEANS          0x10000000

#define MT_ST_SETBOOLEANS       0x30000000

#define MT_ST_CLEARBOOLEANS     0x40000000

#define MT_ST_WRITE_THRESHOLD   0x20000000

#define MT_ST_DEF_BLKSIZE       0x50000000

#define MT_ST_DEF_OPTIONS       0x60000000

#define MT_ST_TIMEOUTS          0x70000000

#define MT_ST_SET_TIMEOUT       (MT_ST_TIMEOUTS | 0x000000)

#define MT_ST_SET_LONG_TIMEOUT  (MT_ST_TIMEOUTS | 0x100000)

#define MT_ST_SET_CLN           0x80000000

#define MT_ST_BUFFER_WRITES     0x1

#define MT_ST_ASYNC_WRITES      0x2

#define MT_ST_READ_AHEAD        0x4

#define MT_ST_DEBUGGING         0x8

#define MT_ST_TWO_FM            0x10

#define MT_ST_FAST_MTEOM        0x20

#define MT_ST_AUTO_LOCK         0x40

#define MT_ST_DEF_WRITES        0x80

#define MT_ST_CAN_BSR           0x100

#define MT_ST_NO_BLKLIMS        0x200

#define MT_ST_CAN_PARTITIONS    0x400

#define MT_ST_SCSI2LOGICAL      0x800

#define MT_ST_SYSV              0x1000

#define MT_ST_NOWAIT            0x2000

/* The mode parameters to be controlled. Parameter chosen with bits 20-28 */

#define MT_ST_CLEAR_DEFAULT     0xfffff

#define MT_ST_DEF_DENSITY       (MT_ST_DEF_OPTIONS | 0x100000)

#define MT_ST_DEF_COMPRESSION   (MT_ST_DEF_OPTIONS | 0x200000)

#define MT_ST_DEF_DRVBUFFER     (MT_ST_DEF_OPTIONS | 0x300000)

/* The offset for the arguments for the special HP changer load command. */

#define MT_ST_HPLOADER_OFFSET 10000

#endif /* _LINUX_MTIO_H */