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https://github.com/freebsd/freebsd-src
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193 lines
5.3 KiB
C
193 lines
5.3 KiB
C
/*
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* SCSI tape interface description
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*/
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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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* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
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*
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* $Id$
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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 byte2;
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#define SRWT_FIXED 0x01
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u_char len[3];
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u_char control;
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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 byte2;
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#define SS_CODE 0x03
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u_char number[3];
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u_char control;
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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 byte2;
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u_char number[3];
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u_char control;
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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 byte2;
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#define SR_IMMED 0x01
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u_char unused[3];
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u_char control;
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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 byte2;
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#define SL_IMMED 0x01
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u_char unused[2];
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u_char how;
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u_char control;
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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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#define LD_RETEN 2
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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 byte2;
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u_char unused[3];
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u_char control;
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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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/* defines for the device specific byte in the mode select/sense header */
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#define SMH_DSP_SPEED 0x0F
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#define SMH_DSP_BUFF_MODE 0x70
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#define SMH_DSP_BUFF_MODE_OFF 0x00
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#define SMH_DSP_BUFF_MODE_ON 0x10
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#define SMH_DSP_BUFF_MODE_MLTI 0x20
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#define SMH_DSP_WRITE_PROT 0x80
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/* A special for the CIPHER ST150S(old drive) */
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struct blk_desc_cipher
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{
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u_char density;
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u_char nblocks[3];
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u_char reserved;
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u_char blklen[3];
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u_char other;
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#define ST150_SEC 0x01 /* soft error count */
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#define SR150_AUI 0x02 /* autoload inhibit */
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};
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/**********************************************************************
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from the scsi2 spec
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Value Tracks Density(bpi) Code Type Reference Note
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0x1 9 800 NRZI R X3.22-1983 2
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0x2 9 1600 PE R X3.39-1986 2
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0x3 9 6250 GCR R X3.54-1986 2
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0x5 4/9 8000 GCR C X3.136-1986 1
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0x6 9 3200 PE R X3.157-1987 2
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0x7 4 6400 IMFM C X3.116-1986 1
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0x8 4 8000 GCR CS X3.158-1986 1
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0x9 18 37871 GCR C X3B5/87-099 2
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0xA 22 6667 MFM C X3B5/86-199 1
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0xB 4 1600 PE C X3.56-1986 1
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0xC 24 12690 GCR C HI-TC1 1,5
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0xD 24 25380 GCR C HI-TC2 1,5
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0xF 15 10000 GCR C QIC-120 1,5
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0x10 18 10000 GCR C QIC-150 1,5
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0x11 26 16000 GCR C QIC-320(525?) 1,5
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0x12 30 51667 RLL C QIC-1350 1,5
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0x13 1 61000 DDS CS X3B5/88-185A 4
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0x14 1 43245 RLL CS X3.202-1991 4
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0x15 1 45434 RLL CS ECMA TC17 4
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0x16 48 10000 MFM C X3.193-1990 1
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0x17 48 42500 MFM C X3B5/91-174 1
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where Code means:
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NRZI Non Return to Zero, change on ones
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GCR Group Code Recording
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PE Phase Encoded
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IMFM Inverted Modified Frequency Modulation
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MFM Modified Frequency Modulation
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DDS Dat Data Storage
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RLL Run Length Encoding
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where Type means:
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R Real-to-Real
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C Cartridge
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CS cassette
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where Notes means:
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1 Serial Recorded
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2 Parallel Recorded
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3 Old format know as QIC-11
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4 Helical Scan
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5 Not ANSI standard, rather industry standard.
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********************************************************************/
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#define HALFINCH_800 0x01
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#define HALFINCH_1600 0x02
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#define HALFINCH_6250 0x03
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#define QIC_24 0x05 /* may be bad, works for CIPHER ST150S XXX */
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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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