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intio.c revision 1.9 
      1 /*	$NetBSD: intio.c,v 1.9 2005/01/19 01:58:21 chs 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 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 /*
     40  * Autoconfiguration support for next68k internal i/o space.
     41  */
     42 
     43 #include <sys/cdefs.h>
     44 __KERNEL_RCSID(0, "$NetBSD: intio.c,v 1.9 2005/01/19 01:58:21 chs Exp $");
     45 
     46 #include <sys/param.h>
     47 #include <sys/systm.h>
     48 #include <sys/device.h>
     49 #include <sys/reboot.h>
     50 
     51 #include <machine/autoconf.h>
     52 
     53 #include <next68k/dev/intiovar.h>
     54 
     55 int	intiomatch(struct device *, struct cfdata *, void *);
     56 void	intioattach(struct device *, struct device *, void *);
     57 int	intioprint(void *, const char *);
     58 int	intiosearch(struct device *, struct cfdata *, void *);
     59 
     60 CFATTACH_DECL(intio, sizeof(struct device),
     61     intiomatch, intioattach, NULL, NULL);
     62 
     63 #if 0
     64 struct cfdriver intio_cd = {
     65 	NULL, "intio", DV_DULL
     66 };
     67 #endif
     68 
     69 static int intio_attached = 0;
     70 
     71 int
     72 intiomatch(struct device *parent, struct cfdata *match, void *aux)
     73 {
     74 	/* Allow only one instance. */
     75 	if (intio_attached)
     76 		return (0);
     77 
     78 	return (1);
     79 }
     80 
     81 void
     82 intioattach(struct device *parent, struct device *self, void *aux)
     83 {
     84 
     85 	printf("\n");
     86 
     87 	/* Search for and attach children. */
     88 	config_search(intiosearch, self, aux);
     89 
     90 	intio_attached = 1;
     91 }
     92 
     93 int
     94 intioprint(void *aux, const char *pnp)
     95 {
     96 	struct intio_attach_args *ia = aux;
     97 
     98 	if (ia->ia_addr)
     99 		aprint_normal(" addr %p", ia->ia_addr);
    100 
    101 	return (UNCONF);
    102 }
    103 
    104 int
    105 intiosearch(struct device *parent, struct cfdata *cf, void *aux)
    106 {
    107 	struct mainbus_attach_args *mba = (struct mainbus_attach_args *) aux;
    108 	struct intio_attach_args ia;
    109 
    110 	do {
    111 		ia.ia_addr = NULL;
    112 		ia.ia_bst = NEXT68K_INTIO_BUS_SPACE;
    113 		ia.ia_dmat = mba->mba_dmat;
    114 
    115 		if (config_match(parent, cf, &ia) == 0)
    116 			break;
    117 		config_attach(parent, cf, &ia, intioprint);
    118 	} while (cf->cf_fstate == FSTATE_STAR);
    119 
    120 	return (0);
    121 }
    122