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scsi_tape.h revision 1.1 
      1 /*
      2  * HISTORY
      3  * $Log: scsi_tape.h,v $
      4  * Revision 1.1  1993/03/21 18:04:42  cgd
      5  * after 0.2.2 "stable" patches applied
      6  *
      7  * Revision 1.2  1993/01/26  18:39:08  julian
      8  * add the 'write protected' bit in the device status struct.
      9  *
     10  * Revision 1.1  1992/09/26  22:10:21  julian
     11  * Initial revision
     12  *
     13  *
     14  * PATCHES MAGIC                LEVEL   PATCH THAT GOT US HERE
     15  * --------------------         -----   ----------------------
     16  * CURRENT PATCH LEVEL:         1       00098
     17  * --------------------         -----   ----------------------
     18  *
     19  * 16 Feb 93	Julian Elischer		ADDED for SCSI system
     20  *
     21  */
     22 
     23 /*
     24  * SCSI tape interface description
     25  */
     26 
     27 /*
     28  * Written by Julian Elischer (julian (at) tfs.com)
     29  * for TRW Financial Systems.
     30  *
     31  * TRW Financial Systems, in accordance with their agreement with Carnegie
     32  * Mellon University, makes this software available to CMU to distribute
     33  * or use in any manner that they see fit as long as this message is kept with
     34  * the software. For this reason TFS also grants any other persons or
     35  * organisations permission to use or modify this software.
     36  *
     37  * TFS supplies this software to be publicly redistributed
     38  * on the understanding that TFS is not responsible for the correct
     39  * functioning of this software in any circumstances.
     40  *
     41  */
     42 
     43 /*
     44  * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992
     45  */
     46 
     47 /*
     48  * SCSI command format
     49  */
     50 
     51 
     52 struct scsi_rw_tape
     53 {
     54 	u_char	op_code;
     55 	u_char	fixed:1;
     56 	u_char	:4;
     57 	u_char	lun:3;
     58 	u_char	len[3];
     59 	u_char	link:1;
     60 	u_char	flag:1;
     61 	u_char	:6;
     62 } rw_tape;
     63 
     64 struct scsi_space
     65 {
     66 	u_char	op_code;
     67 	u_char	code:2;
     68 	u_char	:3;
     69 	u_char	lun:3;
     70 	u_char	number[3];
     71 	u_char	link:1;
     72 	u_char	flag:1;
     73 	u_char	:6;
     74 } space;
     75 #define SP_BLKS	0
     76 #define SP_FILEMARKS 1
     77 #define SP_SEQ_FILEMARKS 2
     78 #define	SP_EOM	3
     79 
     80 struct scsi_write_filemarks
     81 {
     82 	u_char	op_code;
     83 	u_char	:5;
     84 	u_char	lun:3;
     85 	u_char	number[3];
     86 	u_char	link:1;
     87 	u_char	flag:1;
     88 	u_char	:6;
     89 } write_filemarks;
     90 
     91 struct scsi_rewind
     92 {
     93 	u_char	op_code;
     94 	u_char	immed:1;
     95 	u_char	:4;
     96 	u_char	lun:3;
     97 	u_char	unused[3];
     98 	u_char	link:1;
     99 	u_char	flag:1;
    100 	u_char	:6;
    101 } rewind;
    102 
    103 struct scsi_load
    104 {
    105 	u_char	op_code;
    106 	u_char	immed:1;
    107 	u_char	:4;
    108 	u_char	lun:3;
    109 	u_char	unused[2];
    110 	u_char	load:1;
    111 	u_char	reten:1;
    112 	u_char	:6;
    113 	u_char	link:1;
    114 	u_char	flag:1;
    115 	u_char	:6;
    116 } load;
    117 #define LD_UNLOAD 0
    118 #define LD_LOAD 1
    119 
    120 struct scsi_blk_limits
    121 {
    122 	u_char	op_code;
    123 	u_char	:5;
    124 	u_char	lun:3;
    125 	u_char	unused[3];
    126 	u_char	link:1;
    127 	u_char	flag:1;
    128 	u_char	:6;
    129 } blk_limits;
    130 
    131 /*
    132  * Opcodes
    133  */
    134 
    135 #define REWIND			0x01
    136 #define	READ_BLK_LIMITS		0x05
    137 #define	READ_COMMAND_TAPE	0x08
    138 #define WRITE_COMMAND_TAPE	0x0a
    139 #define	WRITE_FILEMARKS		0x10
    140 #define	SPACE			0x11
    141 #define LOAD_UNLOAD		0x1b /* same as above */
    142 
    143 
    144 
    145 struct scsi_blk_limits_data
    146 {
    147 	u_char	reserved;
    148 	u_char	max_length_2;	/* Most significant */
    149 	u_char	max_length_1;
    150 	u_char	max_length_0;	/* Least significant */
    151 	u_char	min_length_1;	/* Most significant */
    152 	u_char	min_length_0;	/* Least significant */
    153 };
    154 
    155 struct	scsi_mode_header_tape
    156 {
    157 	u_char  data_length;    /* Sense data length */
    158 	u_char  medium_type;
    159 	u_char	speed:4;
    160 	u_char	buf_mode:3;
    161 	u_char	write_protected:1;
    162 	u_char  blk_desc_len;
    163 };
    164 
    165 
    166 #define QIC_120     0x0f
    167 #define QIC_150     0x10
    168 #define QIC_320     0x11
    169 #define QIC_525     0x11
    170 #define QIC_1320     0x12
    171 
    172 
    173