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obio.c revision 1.6 
      1 /*	$NetBSD: obio.c,v 1.6 1997/02/11 22:44:26 scottr 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 Jason R. Thorpe.
      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 REGENTS OR CONTRIBUTORS BE
     30  * 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/bus.h>
     44 
     45 #include <mac68k/dev/obiovar.h>
     46 
     47 static int	obio_match __P((struct device *, struct cfdata *, void *));
     48 static void	obio_attach __P((struct device *, struct device *, void *));
     49 static int	obio_print __P((void *, const char *));
     50 static int	obio_search __P((struct device *, struct cfdata *, void *));
     51 
     52 struct cfattach obio_ca = {
     53 	sizeof(struct device), obio_match, obio_attach
     54 };
     55 
     56 struct cfdriver obio_cd = {
     57 	NULL, "obio", DV_DULL
     58 };
     59 
     60 static int
     61 obio_match(parent, cf, aux)
     62 	struct device *parent;
     63 	struct cfdata *cf;
     64 	void *aux;
     65 {
     66 	static int obio_matched = 0;
     67 
     68 	/* Allow only one instance. */
     69 	if (obio_matched)
     70 		return (0);
     71 
     72 	obio_matched = 1;
     73 	return (1);
     74 }
     75 
     76 static void
     77 obio_attach(parent, self, aux)
     78 	struct device *parent;
     79 	struct device *self;
     80 	void *aux;
     81 {
     82 	printf("\n");
     83 
     84 	/* Search for and attach children. */
     85 	(void)config_search(obio_search, self, aux);
     86 }
     87 
     88 int
     89 obio_print(args, name)
     90 	void *args;
     91 	const char *name;
     92 {
     93 	struct obio_attach_args *oa = (struct obio_attach_args *)args;
     94 
     95 	if (oa->oa_addr != (-1))
     96 		printf(" addr %x", oa->oa_addr);
     97 
     98 	return (UNCONF);
     99 }
    100 
    101 int
    102 obio_search(parent, cf, aux)
    103 	struct device *parent;
    104 	struct cfdata *cf;
    105 	void *aux;
    106 {
    107 	struct obio_attach_args oa;
    108 
    109 	oa.oa_addr = cf->cf_loc[0];
    110 	oa.oa_tag = MAC68K_BUS_SPACE_MEM;
    111 
    112 	if ((*cf->cf_attach->ca_match)(parent, cf, &oa) > 0)
    113 		config_attach(parent, cf, &oa, obio_print);
    114 
    115 	return (0);
    116 }
    117