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      1 /*	$NetBSD: if_dmcreg.h,v 1.4 2005/12/11 12:23:29 christos Exp $	*/
      2 /*
      3  * Copyright (c) 1982, 1986 Regents of the University of California.
      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  * 3. Neither the name of the University nor the names of its contributors
     15  *    may be used to endorse or promote products derived from this software
     16  *    without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     28  * SUCH DAMAGE.
     29  *
     30  *	@(#)if_dmc.h	7.5 (Berkeley) 6/28/90
     31  */
     32 
     33 /*
     34  * DMC-11 Interface
     35  */
     36 
     37 #ifdef notdef
     38 struct dmcdevice {
     39 	char	bsel0;
     40 	char	bsel1;
     41 	char	bsel2;
     42 	char	bsel3;
     43 	short	sel4;
     44 	short	sel6;
     45 };
     46 #endif
     47 
     48 #define	DMC_BSEL0	0
     49 #define DMC_BSEL1	1
     50 #define DMC_BSEL2	2
     51 #define DMC_BSEL3	3
     52 #define DMC_SEL4	4
     53 #define DMC_SEL6	6
     54 
     55 /*
     56  * dmc software packet encapsulation.  This allows the dmc
     57  * link to be multiplexed among several protocols.
     58  * The first eight bytes of the dmc header are garbage,
     59  * since on a vax the uba has been known to mung these
     60  * bytes.  The next two bytes encapsulate packet type.
     61  */
     62 struct dmc_header {
     63 	char	dmc_buf[8];	/* space for uba on vax */
     64 	short	dmc_type;	/* encapsulate packet type */
     65 };
     66 
     67 /* packet types */
     68 #define	DMC_IPTYPE	1
     69 #define	DMC_TRAILER	2
     70 #define	DMC_NTRAILER	16
     71 
     72 /*
     73  * DMCMTU includes space for data (1024) +
     74  * protocol header (256) + trailer descriptor (4).
     75  * The software link encapsulation header (dmc_header)
     76  * is handled separately.
     77 	#define DMCMTU  1284
     78  */
     79 #define DMCMTU  1500
     80 
     81 #define	RDYSCAN	16	/* loop delay for RDYI after RQI */
     82 
     83 /* defines for bsel0 */
     84 #define	DMC_BACCI	0
     85 #define	DMC_CNTLI	1
     86 #define	DMC_PERR	2
     87 #define	DMC_BASEI	3
     88 #define	DMC_WRITE	0		/* transmit block */
     89 #define	DMC_READ	4		/* read block */
     90 #define	DMC_RQI		0040		/* port request bit */
     91 #define	DMC_IEI		0100		/* enable input interrupts */
     92 #define	DMC_RDYI	0200		/* port ready */
     93 #define	DMC0BITS	"\10\10RDI\7IEI\6RQI"
     94 
     95 /* defines for bsel1 */
     96 #define	DMC_MCLR	0100		/* DMC11 Master Clear */
     97 #define	DMC_RUN		0200		/* clock running */
     98 #define	DMC1BITS	"\10\10RUN\7MCLR"
     99 
    100 /* defines for bsel2 */
    101 #define	DMC_BACCO	0
    102 #define	DMC_CNTLO	1
    103 #define	DMC_OUX		0		/* transmit block */
    104 #define	DMC_OUR		4		/* read block */
    105 #define	DMC_IEO		0100		/* enable output interrupts */
    106 #define	DMC_RDYO	0200		/* port available */
    107 #define	DMC2BITS	"\10\10RDO\7IEO"
    108 
    109 /* defines for CNTLI mode */
    110 #define	DMC_HDPLX	02000		/* half duplex DDCMP operation */
    111 #define	DMC_SEC		04000		/* half duplex secondary station */
    112 #define	DMC_MAINT	00400		/* enter maintenance mode */
    113 
    114 /* defines for BACCI/O and BASEI mode */
    115 #define	DMC_XMEM	0140000		/* xmem bit position */
    116 #define	DMC_CCOUNT	0037777		/* character count mask */
    117 #define	DMC_RESUME	0002000		/* resume (BASEI only) */
    118 
    119 /* defines for CNTLO */
    120 #define	DMC_CNTMASK	01777
    121 
    122 #define	DMC_DATACK	01
    123 #define	DMC_TIMEOUT	02
    124 #define	DMC_NOBUFS	04
    125 #define	DMC_MAINTREC	010
    126 #define	DMC_LOSTDATA	020
    127 #define	DMC_DISCONN	0100
    128 #define	DMC_START	0200
    129 #define	DMC_NEXMEM	0400
    130 #define	DMC_ERROR	01000
    131 
    132 #define	DMC_FATAL (DMC_ERROR|DMC_NEXMEM|DMC_START|DMC_LOSTDATA|DMC_MAINTREC)
    133 #define	CNTLO_BITS	\
    134    "\10\12ERROR\11NEXMEM\10START\7DISC\5LSTDATA\4MAINT\3NOBUF\2TIMEO\1DATACK"
    135