/*- * Copyright (c) 1982, 1986 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. * * @(#)rsp.h 7.2 (Berkeley) 5/9/91 */ /* * TU58 transfer protocol constants and data structures */ /* * Structure of a command packet */ struct packet { u_char pk_flag; /* indicates packet type (cmd, data, etc.) */ u_char pk_mcount; /* length of packet (bytes) */ u_char pk_op; /* operation to perform (read, write, etc.) */ u_char pk_mod; /* modifier for op or returned status */ u_char pk_unit; /* unit number */ u_char pk_sw; /* switches */ u_short pk_seq; /* sequence number, always zero */ u_short pk_count; /* requested byte count for read or write */ u_short pk_block; /* block number for read, write, or seek */ u_short pk_chksum; /* checksum, by words with end around carry */ }; /* * States */ #define TUS_INIT1 0 /* sending nulls */ #define TUS_INIT2 1 /* sending inits */ #define TUS_IDLE 2 /* initialized, no transfer in progress */ #define TUS_SENDH 3 /* sending header */ #define TUS_SENDD 4 /* sending data */ #define TUS_SENDC 5 /* sending checksum */ #define TUS_SENDR 6 /* sending read command packet */ #define TUS_SENDW 7 /* sending write command packet */ #define TUS_GETH 8 /* reading header */ #define TUS_GETD 9 /* reading data */ #define TUS_GETC 10 /* reading checksum */ #define TUS_GET 11 /* reading an entire packet */ #define TUS_WAIT 12 /* waiting for continue */ #define TUS_RCVERR 13 /* receiver error in pseudo DMA routine */ #define TUS_CHKERR 14 /* checksum error in pseudo DMA routine */ #define TUS_NSTATES 15 #define printstate(state) \ if ((state) < TUS_NSTATES) \ printf("%s", tustates[(state)]); \ else \ printf("%d", (state)); /* * Packet Flags */ #define TUF_DATA 1 /* data packet */ #define TUF_CMD 2 /* command packet */ #define TUF_INITF 4 /* initialize */ #define TUF_CONT 020 /* continue */ #define TUF_XOFF 023 /* flow control */ /* * Op Codes */ #define TUOP_NOOP 0 /* no operation */ #define TUOP_INIT 1 /* initialize */ #define TUOP_READ 2 /* read block */ #define TUOP_WRITE 3 /* write block */ #define TUOP_SEEK 5 /* seek to block */ #define TUOP_DIAGNOSE 7 /* run micro-diagnostics */ #define TUOP_END 0100 /* end packet */ /* * Mod Flags */ #define TUMD_WRV 1 /* write with read verify */ /* * Switches */ #define TUSW_MRSP 010 /* use Modified RSP */