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scsi_tape.h revision 1.2 
      1 /*
      2  * SCSI tape interface description
      3  *
      4  * Written by Julian Elischer (julian (at) tfs.com)
      5  * for TRW Financial Systems.
      6  *
      7  * TRW Financial Systems, in accordance with their agreement with Carnegie
      8  * Mellon University, makes this software available to CMU to distribute
      9  * or use in any manner that they see fit as long as this message is kept with
     10  * the software. For this reason TFS also grants any other persons or
     11  * organisations permission to use or modify this software.
     12  *
     13  * TFS supplies this software to be publicly redistributed
     14  * on the understanding that TFS is not responsible for the correct
     15  * functioning of this software in any circumstances.
     16  *
     17  *	$Id: scsi_tape.h,v 1.2 1993/05/20 03:46:34 cgd Exp $
     18  */
     19 
     20 /*
     21  * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992
     22  */
     23 
     24 /*
     25  * SCSI command format
     26  */
     27 
     28 
     29 struct scsi_rw_tape
     30 {
     31 	u_char	op_code;
     32 	u_char	fixed:1;
     33 	u_char	:4;
     34 	u_char	lun:3;
     35 	u_char	len[3];
     36 	u_char	link:1;
     37 	u_char	flag:1;
     38 	u_char	:6;
     39 } rw_tape;
     40 
     41 struct scsi_space
     42 {
     43 	u_char	op_code;
     44 	u_char	code:2;
     45 	u_char	:3;
     46 	u_char	lun:3;
     47 	u_char	number[3];
     48 	u_char	link:1;
     49 	u_char	flag:1;
     50 	u_char	:6;
     51 } space;
     52 #define SP_BLKS	0
     53 #define SP_FILEMARKS 1
     54 #define SP_SEQ_FILEMARKS 2
     55 #define	SP_EOM	3
     56 
     57 struct scsi_write_filemarks
     58 {
     59 	u_char	op_code;
     60 	u_char	:5;
     61 	u_char	lun:3;
     62 	u_char	number[3];
     63 	u_char	link:1;
     64 	u_char	flag:1;
     65 	u_char	:6;
     66 } write_filemarks;
     67 
     68 struct scsi_rewind
     69 {
     70 	u_char	op_code;
     71 	u_char	immed:1;
     72 	u_char	:4;
     73 	u_char	lun:3;
     74 	u_char	unused[3];
     75 	u_char	link:1;
     76 	u_char	flag:1;
     77 	u_char	:6;
     78 } rewind;
     79 
     80 struct scsi_load
     81 {
     82 	u_char	op_code;
     83 	u_char	immed:1;
     84 	u_char	:4;
     85 	u_char	lun:3;
     86 	u_char	unused[2];
     87 	u_char	load:1;
     88 	u_char	reten:1;
     89 	u_char	:6;
     90 	u_char	link:1;
     91 	u_char	flag:1;
     92 	u_char	:6;
     93 } load;
     94 #define LD_UNLOAD 0
     95 #define LD_LOAD 1
     96 
     97 struct scsi_blk_limits
     98 {
     99 	u_char	op_code;
    100 	u_char	:5;
    101 	u_char	lun:3;
    102 	u_char	unused[3];
    103 	u_char	link:1;
    104 	u_char	flag:1;
    105 	u_char	:6;
    106 } blk_limits;
    107 
    108 /*
    109  * Opcodes
    110  */
    111 
    112 #define REWIND			0x01
    113 #define	READ_BLK_LIMITS		0x05
    114 #define	READ_COMMAND_TAPE	0x08
    115 #define WRITE_COMMAND_TAPE	0x0a
    116 #define	WRITE_FILEMARKS		0x10
    117 #define	SPACE			0x11
    118 #define LOAD_UNLOAD		0x1b /* same as above */
    119 
    120 
    121 
    122 struct scsi_blk_limits_data
    123 {
    124 	u_char	reserved;
    125 	u_char	max_length_2;	/* Most significant */
    126 	u_char	max_length_1;
    127 	u_char	max_length_0;	/* Least significant */
    128 	u_char	min_length_1;	/* Most significant */
    129 	u_char	min_length_0;	/* Least significant */
    130 };
    131 
    132 struct	scsi_mode_header_tape
    133 {
    134 	u_char  data_length;    /* Sense data length */
    135 	u_char  medium_type;
    136 	u_char	speed:4;
    137 	u_char	buf_mode:3;
    138 	u_char	write_protected:1;
    139 	u_char  blk_desc_len;
    140 };
    141 
    142 
    143 #define QIC_120     0x0f
    144 #define QIC_150     0x10
    145 #define QIC_320     0x11
    146 #define QIC_525     0x11
    147 #define QIC_1320     0x12
    148 
    149 
    150