freebsd-skq/sys/scsi/scsi_tape.h

/*
 * 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 1.10 1994/10/28 13:19:34 jkh Exp $
 */
#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;

/*
** Tape erase - AKL: Andreas Klemm <andreas@knobel.gun.de>
*/
struct scsi_erase
{
	u_char	op_code;
	u_char	byte2;
#define	SE_LONG		0x01	/*
				** Archive Viper 2525 doesn't allow short 
				** erase, other tapes possibly don't allow 
				** that, too.
				*/
#define	SE_IMMED	0x02
	u_char	unused[3];
	u_char	control;
} erase;

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	ERASE			0x19 /* AKL */
#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 */
};

/*
 * This structure defines the various mode pages that tapes know about.
 */
#define PAGE_HEADERLEN 2
struct	tape_pages 
{
	u_char pg_code;	/* page code    */
#define ST_PAGE_CONFIGURATION	0x10
#define ST_PAGE_MEDIUM_PART	0x11
#define ST_PAGE_MEDIUM_PART2	0x12
#define ST_PAGE_MEDIUM_PART3	0x13
#define ST_PAGE_MEDIUM_PART4	0x14
#define ST_P_CODE	0x3F	/* page code */
#define ST_P_PS	0x80		/* page savable */
	u_char pg_length;	/* page length  */
	union 
	{
		struct 
		{
			u_char active_format;	/* active format for density*/
#define ST_P_CAP 0x40	/* change active Partition */
#define ST_P_CAF 0x20	/* change active format */
#define ST_P_AF	 0x1F	/* active format */
			u_char active_partition; /* */
			u_char write_buffer_full_ratio; /* highwater writing*/
			u_char read_buffer_empty_ratio; /* lowwater reading*/
			u_char write_delay_high; /* # 100mSecs before flush*/
			u_char write_delay_low;	/* of buffer to the media */
			u_char flags1;		/* various single bit flags */
#define	ST_P_DBR	0x80 /* supports data-buffer recovery */
#define	ST_P_BIS	0x40 /* supports Block_ID */
#define	ST_P_RSmk	0x20 /* Reports setmarks during reads and spaces */
#define	ST_P_AVC	0x10 /* Supports Automatic Velocity Control */
#define	ST_P_SOCF	0x0C /* Stop On Consecutive Filemarks, */
#define	ST_P_RBO	0x02 /* Recoverd Buffered Data order, 1 = LIFO */
#define	ST_P_REW	0x01 /* Report Early Warning (see SEW) */
			u_char gap_size;	/*I/B gap,  1=min 0=default */
			u_char flags2;		/* various single bit flags */
#define	ST_P_EOD	0xE0 /* What is and EOD....*/
#define	ST_P_EOD_DEF 	0x00 /* Drive's default	*/
#define	ST_P_EOD_FMT	0x20 /* define by format */
#define	ST_P_EOD_SOCF	0x40 /* define by SOCF (above) */
#define	ST_P_EEG	0x10 /* use EOD above */
#define	ST_P_SEW	0x04 /* Synchronise at Early warning.. flush buffers*/
			u_char 	early_warn_high;/* buf size at early warning */
			u_char 	early_warn_med;	/* after early warning, only */
			u_char 	early_warn_low;	/* buufer this much data */
			u_char	data_compress_alg; /* 0 = off, 1 = default */
			u_char	reserved;	/* The standard says so */
		} configuration;
		struct 
		{
#define ST_MAXPARTS 16 /*for now*/
			u_char	max_add_parts; /* that drive allows */
			u_char	parts_defined; /* max min(ST_MAXPARTS,max_add_parts) */
			u_char	flags;
#define	ST_P_FDP 0x80
#define	ST_P_SDP 0x40
#define	ST_P_IDP 0x20
#define	ST_P_PSUM 0x18	/* units of part defs.. */
#define	ST_P_PSUM_BYTES		0x0	/* units of part defs.. */
#define	ST_P_PSUM_KBYTES	0x08	/* units of part defs.. */
#define	ST_P_PSUM_MBYTES	0x10	/* units of part defs.. */
			u_char	medium_format_recog;
#define	ST_P_REC_NONE 0x00
#define	ST_P_REC_FMT 0x01	/* can recognise format of new media */
#define	ST_P_REC_PART 0x02  /* can recognise partitions of new media */
#define	ST_P_REC_FMT_PART 0x03	/* can recognise format and parts */
			u_char	reserved1;
			u_char	reserved2;
			struct
			{
				u_char	high;
				u_char	low;
			}part[ST_MAXPARTS];
    		} medium_partition;
		struct 
		{
			struct
			{
				u_char	high;
				u_char	low;
			}part[ST_MAXPARTS];
    		} medium_partition_extra;
	}pages;
};




#ifndef NEW_SCSICONF
/**********************************************************************
			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 /* NEW_SCSICONF */

#endif /*SCSI_SCSI_TAPE_H*/