/*
 * Copyright (c) 1982, 1986 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)mtio.h	7.8 (Berkeley) 03/29/92
 */

/*
 * Structures and definitions for mag tape io control commands
 */

/* structure for MTIOCTOP - mag tape op command */
struct mtop {
	short	mt_op;		/* operations defined below */
	daddr_t	mt_count;	/* how many of them */
};

/* operations */
#define MTWEOF		0	/* write an end-of-file record */
#define MTFSF		1	/* forward space file */
#define MTBSF		2	/* backward space file */
#define MTFSR		3	/* forward space record */
#define MTBSR		4	/* backward space record */
#define MTREW		5	/* rewind */
#define MTOFFL		6	/* rewind and put the drive offline */
#define MTNOP		7	/* no operation, sets status only */
#define MTCACHE		8	/* enable controller cache */
#define MTNOCACHE	9	/* disable controller cache */

/* structure for MTIOCGET - mag tape get status command */

struct mtget {
	short	mt_type;	/* type of magtape device */
/* the following two registers are grossly device dependent */
	short	mt_dsreg;	/* ``drive status'' register */
	short	mt_erreg;	/* ``error'' register */
/* end device-dependent registers */
	short	mt_resid;	/* residual count */
/* the following two are not yet implemented */
	daddr_t	mt_fileno;	/* file number of current position */
	daddr_t	mt_blkno;	/* block number of current position */
/* end not yet implemented */
};

/*
 * Constants for mt_type byte.  These are the same
 * for controllers compatible with the types listed.
 */
#define	MT_ISTS		0x01		/* TS-11 */
#define	MT_ISHT		0x02		/* TM03 Massbus: TE16, TU45, TU77 */
#define	MT_ISTM		0x03		/* TM11/TE10 Unibus */
#define	MT_ISMT		0x04		/* TM78/TU78 Massbus */
#define	MT_ISUT		0x05		/* SI TU-45 emulation on Unibus */
#define	MT_ISCPC	0x06		/* SUN */
#define	MT_ISAR		0x07		/* SUN */
#define	MT_ISTMSCP	0x08		/* DEC TMSCP protocol (TU81, TK50) */
#define MT_ISCY		0x09		/* CCI Cipher */
#define MT_ISCT		0x0a		/* HP 1/4 tape */
#define MT_ISFHP	0x0b		/* HP 7980 1/2 tape */
#define MT_ISEXABYTE	0x0c		/* Exabyte */
#define MT_ISEXA8200	0x0c		/* Exabyte EXB-8200 */
#define MT_ISEXA8500	0x0d		/* Exabyte EXB-8500 */
#define MT_ISVIPER1	0x0e		/* Archive Viper-150 */
#define MT_ISPYTHON	0x0f		/* Archive Python (DAT) */
#define MT_ISHPDAT	0x10		/* HP 35450A DAT drive */
#define MT_ISMFOUR	0x11		/* M4 Data 1/2 9track drive */
#define MT_ISTK50	0x12		/* DEC SCSI TK50 */
#define MT_ISMT02	0x13		/* Emulex MT02 SCSI tape controller */

/* mag tape io control commands */
#define	MTIOCTOP	_IOW('m', 1, struct mtop)	/* do a mag tape op */
#define	MTIOCGET	_IOR('m', 2, struct mtget)	/* get tape status */
#define MTIOCIEOT	_IO('m', 3)			/* ignore EOT error */
#define MTIOCEEOT	_IO('m', 4)			/* enable EOT error */

#ifndef KERNEL
#define	DEFTAPE	"/dev/rmt12"
#endif

#ifdef	KERNEL
/*
 * minor device number
 */

#define	T_UNIT		003		/* unit selection */
#define	T_NOREWIND	004		/* no rewind on close */
#define	T_DENSEL	030		/* density select */
#define	T_800BPI	000		/* select  800 bpi */
#define	T_1600BPI	010		/* select 1600 bpi */
#define	T_6250BPI	020		/* select 6250 bpi */
#define	T_BADBPI	030		/* undefined selection */
#endif