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      1 /*	$NetBSD: rsp.h,v 1.3 2017/05/22 17:12:11 ragge Exp $ */
      2 /*
      3  * Copyright (c) 1995 Ludd, University of Lule}, Sweden.
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 
     28 /*
     29  * The Radial Serial Protocol (RSP) that TU58 (DECtape II) uses
     30  * is a strange animal that is sent over serial lines.
     31  * Most packet types can match the struct rsp, but some can't (i.e.
     32  * data packets).
     33  * More about RSP can be read in Digital Peripherals Handbook, p. 92.
     34  */
     35 
     36 struct rsp {
     37 	char	rsp_typ;	/* Packet type */
     38 	char	rsp_sz;		/* Packet size */
     39 	char	rsp_op;		/* Operation */
     40 	char	rsp_mod;	/* Modifier */
     41 	char	rsp_drv;	/* Tape drive number */
     42 	char	rsp_sw;		/* Switches */
     43 	char	rsp_xx1;	/* Unused, always zero */
     44 	char	rsp_xx2;	/* Unused, always zero */
     45 	short	rsp_cnt;	/* Byte count to transfer */
     46 	short	rsp_blk;	/* Block number */
     47 	short	rsp_sum;	/* Checksum of packet */
     48 };
     49 
     50 /* Types of packets */
     51 #define	RSP_TYP_DATA		001	/* DATA packet */
     52 #define	RSP_TYP_COMMAND		002	/* COMMAND packet */
     53 #define	RSP_TYP_INIT		004	/* INITIALIZE packet */
     54 #define	RSP_TYP_BOOT		010	/* BOOTSTRAP packet (PDP11) */
     55 #define	RSP_TYP_CONTINUE	020	/* CONTINUE packet */
     56 #define	RSP_TYP_XOFF		023	/* XOFF packet */
     57 
     58 /* Operation types */
     59 #define	RSP_OP_NOP		000	/* No operation */
     60 #define	RSP_OP_RESET		001	/* Reset */
     61 #define	RSP_OP_READ		002	/* Read data */
     62 #define	RSP_OP_WRITE		003	/* Write data */
     63 #define	RSP_OP_POS		005	/* Position tape */
     64 #define	RSP_OP_DIAG		007	/* internal diagnose */
     65 #define	RSP_OP_GSTAT		010	/* Get status */
     66 #define	RSP_OP_SSTAT		011	/* Set status */
     67 #define	RSP_OP_END		0100	/* End packet */
     68 
     69 /* Modifier */
     70 #define	RSP_MOD_VERIFY		001	/* Verify read data */
     71 #define	RSP_MOD_OK		000	/* Success */
     72 #define	RSP_MOD_RETR		001	/* Success w/ retries */
     73 #define	RSP_MOD_FAIL		-1	/* Failed self-test */
     74 #define	RSP_MOD_PART		-2	/* Partial operation */
     75 #define	RSP_MOD_NET		-8	/* Non-existent tape drive */
     76 #define	RSP_MOD_NOC		-9	/* No cartridge */
     77 #define	RSP_MOD_WP		-11	/* Write protected */
     78 #define	RSP_MOD_DERR		-17	/* Data error */
     79 #define	RSP_MOD_SERR		-32	/* Seek error */
     80 #define	RSP_MOD_STOP		-33	/* Motor stopped */
     81 #define	RSP_MOD_INVAL		-48	/* Invalid opcode */
     82 #define	RSP_MOD_INVBLK		-55	/* Invalid bloch number */
     83 
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