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vme.c revision 1.4 
      1 /*	$NetBSD: vme.c,v 1.4 1998/02/05 04:58:03 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 
     45 /* Does this machine have a VME bus? */
     46 extern int cpu_has_vme;
     47 
     48 /*
     49  * Convert vme unit number to bus type,
     50  * but only for supported bus types.
     51  * (See autoconf.h and vme.h)
     52  */
     53 #define VME_UNITS	6
     54 static const struct {
     55 	int bustype;
     56 	char name[8];
     57 } vme_info[VME_UNITS] = {
     58 	{ BUS_VME16D16, "A16/D16" },
     59 	{ BUS_VME16D32, "A16/D32" },
     60 	{ BUS_VME24D16, "A24/D16" },
     61 	{ BUS_VME24D32, "A24/D32" },
     62 	{ BUS_VME32D16, "A32/D16" },
     63 	{ BUS_VME32D32, "A32/D32" },
     64 };
     65 
     66 static int  vme_match __P((struct device *, struct cfdata *, void *));
     67 static void vme_attach __P((struct device *, struct device *, void *));
     68 
     69 struct cfattach vme_ca = {
     70 	sizeof(struct device), vme_match, vme_attach
     71 };
     72 
     73 static int
     74 vme_match(parent, cf, aux)
     75 	struct device *parent;
     76 	struct cfdata *cf;
     77 	void *aux;
     78 {
     79 	struct confargs *ca = aux;
     80 	int unit;
     81 
     82 	if (cpu_has_vme == 0)
     83 		return (0);
     84 
     85 	unit = cf->cf_unit;
     86 	if (unit >= VME_UNITS)
     87 		return (0);
     88 
     89 	if (ca->ca_bustype != vme_info[unit].bustype)
     90 		return (0);
     91 
     92 	return (1);
     93 }
     94 
     95 static void
     96 vme_attach(parent, self, args)
     97 	struct device *parent;
     98 	struct device *self;
     99 	void *args;
    100 {
    101 	int unit;
    102 
    103 	unit = self->dv_unit;
    104 	printf(": (%s)\n", vme_info[unit].name);
    105 
    106 	/* We know ca_bustype == BUS_VMExx */
    107 	(void) config_search(bus_scan, self, args);
    108 }
    109