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obio.c revision 1.26 
      1 /*	$NetBSD: obio.c,v 1.26 2021/04/24 23:36:41 thorpej 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: obio.c,v 1.26 2021/04/24 23:36:41 thorpej Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/device.h>
     38 
     39 #include "locators.h"
     40 
     41 #include <machine/autoconf.h>
     42 
     43 #include <mac68k/obio/obiovar.h>
     44 
     45 static int	obio_match(device_t, cfdata_t, void *);
     46 static void	obio_attach(device_t, device_t, void *);
     47 static int	obio_print(void *, const char *);
     48 static int	obio_search(device_t, cfdata_t, const int *, void *);
     49 
     50 CFATTACH_DECL_NEW(obio, 0,
     51     obio_match, obio_attach, NULL, NULL);
     52 
     53 static int
     54 obio_match(device_t parent, cfdata_t cf, void *aux)
     55 {
     56 	static bool obio_matched;
     57 
     58 	/* Allow only one instance. */
     59 	if (obio_matched)
     60 		return (0);
     61 
     62 	obio_matched = true;
     63 	return (1);
     64 }
     65 
     66 static void
     67 obio_attach(device_t parent, device_t self, void *aux)
     68 {
     69 	printf("\n");
     70 
     71 	/* Search for and attach children. */
     72 	config_search(self, aux,
     73 	    CFARG_SEARCH, obio_search,
     74 	    CFARG_EOL);
     75 }
     76 
     77 int
     78 obio_print(void *args, const char *name)
     79 {
     80 	struct obio_attach_args *oa = (struct obio_attach_args *)args;
     81 
     82 	if (oa->oa_addr != (-1))
     83 		aprint_normal(" addr %x", oa->oa_addr);
     84 
     85 	return (UNCONF);
     86 }
     87 
     88 int
     89 obio_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
     90 {
     91 	struct mainbus_attach_args *mba = (struct mainbus_attach_args *) aux;
     92 	struct obio_attach_args oa;
     93 
     94 	oa.oa_addr = cf->cf_loc[OBIOCF_ADDR];
     95 	oa.oa_tag = mba->mba_bst;
     96 	oa.oa_dmat = mba->mba_dmat;
     97 
     98 	if (config_probe(parent, cf, &oa))
     99 		config_attach(parent, cf, &oa, obio_print, CFARG_EOL);
    100 
    101 	return (0);
    102 }
    103