sys/scsi/scsi_tape.h

/*
 * SCSI tape interface description
 */

/*
 * Written by Julian Elischer (julian@tfs.com)
 * for TRW Financial Systems.
 *
 * TRW Financial Systems, in accordance with their agreement with Carnegie
 * Mellon University, makes this software available to CMU to distribute
 * or use in any manner that they see fit as long as this message is kept with
 * the software. For this reason TFS also grants any other persons or
 * organisations permission to use or modify this software.
 *
 * TFS supplies this software to be publicly redistributed
 * on the understanding that TFS is not responsible for the correct
 * functioning of this software in any circumstances.
 *
 */

/*
 * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
 *
 *      $Id: scsi_tape.h,v 1.8 93/08/31 21:40:16 julian Exp Locker: julian $
 */
#ifndef SCSI_SCSI_TAPE_H
#define SCSI_SCSI_TAPE_H 1


/*
 * SCSI command formats
 */


struct scsi_rw_tape
{
        u_char  op_code;
        u_char  byte2;
#define SRWT_FIXED      0x01
        u_char  len[3];
        u_char  control;
} rw_tape;

struct scsi_space
{
        u_char  op_code;
        u_char  byte2;
#define SS_CODE 0x03
        u_char  number[3];
        u_char  control;
} space;
#define SP_BLKS 0
#define SP_FILEMARKS 1
#define SP_SEQ_FILEMARKS 2
#define SP_EOM  3

struct scsi_write_filemarks
{
        u_char  op_code;
        u_char  byte2;
        u_char  number[3];
        u_char  control;
} write_filemarks;

struct scsi_rewind
{
        u_char  op_code;
        u_char  byte2;
#define SR_IMMED        0x01
        u_char  unused[3];
        u_char  control;
} rewind;

struct scsi_load
{
        u_char  op_code;
        u_char  byte2;
#define SL_IMMED        0x01
        u_char  unused[2];
        u_char  how;
        u_char  control;
} load;
#define LD_UNLOAD 0
#define LD_LOAD 1
#define LD_RETEN 2


struct scsi_blk_limits
{
        u_char  op_code;
        u_char  byte2;
        u_char  unused[3];
        u_char  control;
} blk_limits;

/*
 * Opcodes
 */

#define REWIND                  0x01
#define READ_BLK_LIMITS         0x05
#define READ_COMMAND_TAPE       0x08
#define WRITE_COMMAND_TAPE      0x0a
#define WRITE_FILEMARKS         0x10
#define SPACE                   0x11
#define LOAD_UNLOAD             0x1b /* same as above */


struct scsi_blk_limits_data
{
        u_char  reserved;
        u_char  max_length_2;   /* Most significant */
        u_char  max_length_1;
        u_char  max_length_0;   /* Least significant */
        u_char  min_length_1;   /* Most significant */
        u_char  min_length_0;   /* Least significant */
};

/* defines for the device specific byte in the mode select/sense header */
#define SMH_DSP_SPEED           0x0F
#define SMH_DSP_BUFF_MODE       0x70
#define SMH_DSP_BUFF_MODE_OFF   0x00
#define SMH_DSP_BUFF_MODE_ON    0x10
#define SMH_DSP_BUFF_MODE_MLTI  0x20
#define SMH_DSP_WRITE_PROT      0x80

/* A special for the CIPHER ST150S(old drive) */
struct  blk_desc_cipher
{
        u_char  density;
        u_char  nblocks[3];
        u_char  reserved;
        u_char  blklen[3];
        u_char  other;
#define ST150_SEC       0x01    /* soft error count */
#define SR150_AUI       0x02    /* autoload inhibit */
};


/**********************************************************************
                        from the scsi2 spec
                Value Tracks Density(bpi) Code Type  Reference     Note
                0x1     9       800       NRZI  R    X3.22-1983    2
                0x2     9      1600       PE    R    X3.39-1986    2
                0x3     9      6250       GCR   R    X3.54-1986    2
                0x5    4/9     8000       GCR   C    X3.136-1986   1
                0x6     9      3200       PE    R    X3.157-1987   2
                0x7     4      6400       IMFM  C    X3.116-1986   1
                0x8     4      8000       GCR   CS   X3.158-1986   1
                0x9    18     37871       GCR   C    X3B5/87-099   2
                0xA    22      6667       MFM   C    X3B5/86-199   1
                0xB     4      1600       PE    C    X3.56-1986    1
                0xC    24     12690       GCR   C    HI-TC1        1,5
                0xD    24     25380       GCR   C    HI-TC2        1,5
                0xF    15     10000       GCR   C    QIC-120       1,5
                0x10   18     10000       GCR   C    QIC-150       1,5
                0x11   26     16000       GCR   C    QIC-320(525?) 1,5
                0x12   30     51667       RLL   C    QIC-1350      1,5
                0x13    1     61000       DDS   CS    X3B5/88-185A 4
                0x14    1     43245       RLL   CS    X3.202-1991  4
                0x15    1     45434       RLL   CS    ECMA TC17    4
                0x16   48     10000       MFM   C     X3.193-1990  1
                0x17   48     42500       MFM   C     X3B5/91-174  1

                where Code means:
                NRZI Non Return to Zero, change on ones
                GCR  Group Code Recording
                PE   Phase Encoded
                IMFM Inverted Modified Frequency Modulation
                MFM  Modified Frequency Modulation
                DDS  Dat Data Storage
                RLL  Run Length Encoding

                where Type means:
                R    Real-to-Real
                C    Cartridge
                CS   cassette

                where Notes means:
                1    Serial Recorded
                2    Parallel Recorded
                3    Old format know as QIC-11
                4    Helical Scan
                5    Not ANSI standard, rather industry standard.

********************************************************************/

#define HALFINCH_800    0x01
#define HALFINCH_1600   0x02
#define HALFINCH_6250   0x03
#define QIC_11          0x04    /* from Archive 150S Theory of Op. XXX  */
#define QIC_24          0x05    /* may be bad, works for CIPHER ST150S XXX */
#define QIC_120         0x0f
#define QIC_150         0x10
#define QIC_320         0x11
#define QIC_525         0x11
#define QIC_1320        0x12
#define DDS             0x13
#define DAT_1           0x13

#endif /*SCSI_SCSI_TAPE_H*/