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+/*
+ * 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*/
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