150 lines
2.7 KiB
C
150 lines
2.7 KiB
C
/*
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* SCSI tape interface description
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*
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* Written by Julian Elischer (julian@tfs.com)
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* for TRW Financial Systems.
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*
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* TRW Financial Systems, in accordance with their agreement with Carnegie
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* Mellon University, makes this software available to CMU to distribute
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* or use in any manner that they see fit as long as this message is kept with
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* the software. For this reason TFS also grants any other persons or
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* organisations permission to use or modify this software.
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*
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* TFS supplies this software to be publicly redistributed
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* on the understanding that TFS is not responsible for the correct
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* functioning of this software in any circumstances.
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*
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* $Id: scsi_tape.h,v 1.2 1993/05/20 03:46:34 cgd Exp $
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*/
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/*
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* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
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*/
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/*
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* SCSI command format
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*/
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struct scsi_rw_tape
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{
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u_char op_code;
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u_char fixed:1;
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u_char :4;
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u_char lun:3;
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u_char len[3];
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u_char link:1;
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u_char flag:1;
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u_char :6;
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} rw_tape;
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struct scsi_space
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{
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u_char op_code;
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u_char code:2;
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u_char :3;
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u_char lun:3;
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u_char number[3];
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u_char link:1;
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u_char flag:1;
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u_char :6;
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} space;
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#define SP_BLKS 0
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#define SP_FILEMARKS 1
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#define SP_SEQ_FILEMARKS 2
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#define SP_EOM 3
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struct scsi_write_filemarks
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{
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u_char op_code;
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u_char :5;
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u_char lun:3;
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u_char number[3];
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u_char link:1;
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u_char flag:1;
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u_char :6;
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} write_filemarks;
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struct scsi_rewind
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{
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u_char op_code;
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u_char immed:1;
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u_char :4;
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u_char lun:3;
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u_char unused[3];
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u_char link:1;
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u_char flag:1;
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u_char :6;
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} rewind;
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struct scsi_load
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{
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u_char op_code;
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u_char immed:1;
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u_char :4;
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u_char lun:3;
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u_char unused[2];
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u_char load:1;
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u_char reten:1;
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u_char :6;
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u_char link:1;
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u_char flag:1;
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u_char :6;
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} load;
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#define LD_UNLOAD 0
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#define LD_LOAD 1
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struct scsi_blk_limits
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{
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u_char op_code;
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u_char :5;
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u_char lun:3;
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u_char unused[3];
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u_char link:1;
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u_char flag:1;
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u_char :6;
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} blk_limits;
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/*
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* Opcodes
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*/
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#define REWIND 0x01
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#define READ_BLK_LIMITS 0x05
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#define READ_COMMAND_TAPE 0x08
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#define WRITE_COMMAND_TAPE 0x0a
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#define WRITE_FILEMARKS 0x10
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#define SPACE 0x11
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#define LOAD_UNLOAD 0x1b /* same as above */
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struct scsi_blk_limits_data
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{
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u_char reserved;
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u_char max_length_2; /* Most significant */
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u_char max_length_1;
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u_char max_length_0; /* Least significant */
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u_char min_length_1; /* Most significant */
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u_char min_length_0; /* Least significant */
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};
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struct scsi_mode_header_tape
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{
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u_char data_length; /* Sense data length */
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u_char medium_type;
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u_char speed:4;
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u_char buf_mode:3;
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u_char write_protected:1;
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u_char blk_desc_len;
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};
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#define QIC_120 0x0f
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#define QIC_150 0x10
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#define QIC_320 0x11
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#define QIC_525 0x11
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#define QIC_1320 0x12
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