/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * Copyright (c) 1982, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)mtio.h	8.1 (Berkeley) 6/2/93
 */

#ifndef	_SYS_MTIO_H_
#define _SYS_MTIO_H_

/*
 * 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 MTRETEN		8	/* retension */
#define MTERASE		9	/* erase entire tape */
#define MTEOM		10	/* forward to end of media */
#define MTNBSF		11	/* backward space to beginning of file */
#define MTCACHE		12	/* enable controller cache */
#define MTNOCACHE	13	/* disable controller cache */
#define MTSETBSIZ	14	/* set block size; 0 for variable */
#define MTSETDNSTY	15	/* set density code for current mode */

/* 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 */
	u_short	mt_dsreg;	/* ``drive status'' register. SCSI sense byte 0x02.  */
	u_short	mt_erreg;	/* ``error'' register. SCSI sense byte 0x0C. */
	u_short mt_ext_err0;	/* SCSI sense bytes 0x13..0x14 */
	u_short mt_ext_err1;	/* SCSI sense bytes 0x15..0x16 */
/* 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 */
	daddr_t	mt_blksiz;	/* current block size */
	daddr_t	mt_density;	/* current density code */
	daddr_t	mt_mblksiz[4];	/* block size for different modes */
	daddr_t mt_mdensity[4];	/* density codes for different modes */
};

/*
 * 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_ISWANGTEK	0x11		/* WANGTEK 5150ES */
#define MT_ISCALIPER	0x12		/* Caliper CP150 */
#define MT_ISWTEK5099	0x13		/* WANGTEK 5099ES */
#define MT_ISVIPER2525	0x14		/* Archive Viper 2525 */
#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 */
#define MT_ISGS		0x14		/* Generic SCSI Tape */

/* 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/rst0"
#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
#endif	/* !_SYS_MTIO_H_ */