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vme.c revision 1.2 
      1 /*	$NetBSD: vme.c,v 1.2 1997/10/16 15:50:05 gwr Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Gordon W. Ross.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/device.h>
     42 
     43 #include <machine/autoconf.h>
     44 #include <machine/vme.h>
     45 
     46 /* Does this machine have a VME bus? */
     47 extern int cpu_has_vme;
     48 
     49 static int  vme_match __P((struct device *, struct cfdata *, void *));
     50 static void vme_attach __P((struct device *, struct device *, void *));
     51 
     52 struct cfattach vme_ca = {
     53 	sizeof(struct device), vme_match, vme_attach
     54 };
     55 
     56 struct cfdriver vme_cd = {
     57 	NULL, "vme", DV_DULL
     58 };
     59 
     60 /*
     61  * Convert vme unit number to bus type.
     62  * (See autoconf.h and vme.h)
     63  */
     64 static const int
     65 vme_bustypes[VME_UNITS] = {
     66 	BUS_VME32D32,
     67 	BUS_VME24D32,
     68 	BUS_VME24D16,
     69 	BUS_VME16D32,
     70 	BUS_VME16D16 };
     71 
     72 static int
     73 vme_match(parent, cf, aux)
     74 	struct device *parent;
     75 	struct cfdata *cf;
     76 	void *aux;
     77 {
     78 	struct confargs *ca = aux;
     79 	int bustype, unit;
     80 
     81 	if (cpu_has_vme == 0)
     82 		return (0);
     83 
     84 	unit = cf->cf_unit;
     85 	if (unit >= VME_UNITS)
     86 		return (0);
     87 	bustype = vme_bustypes[unit];
     88 	if (ca->ca_bustype != bustype)
     89 		return (0);
     90 
     91 	return (1);
     92 }
     93 
     94 static const char
     95 vme_busnames[VME_UNITS][8] = {
     96 	"A32/D32",
     97 	"A24/D32",
     98 	"A24/D16",
     99 	"A16/D32",
    100 	"A16/D16" };
    101 
    102 static void
    103 vme_attach(parent, self, args)
    104 	struct device *parent;
    105 	struct device *self;
    106 	void *args;
    107 {
    108 	char *name;
    109 
    110 	name = vme_busnames[self->dv_unit];
    111 	printf(": (%s)\n", name);
    112 
    113 	/* We know ca_bustype == BUS_VMExx */
    114 	(void) config_search(bus_scan, self, args);
    115 }
    116