sys/arch/next68k/dev/intio.c

   1 /*      $NetBSD: intio.c,v 1.12 2005/12/11 12:18:25 christos 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 /*
  33  * Autoconfiguration support for next68k internal i/o space.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 __KERNEL_RCSID(0, "$NetBSD: intio.c,v 1.12 2005/12/11 12:18:25 christos Exp $");
  38
  39 #include <sys/param.h>
  40 #include <sys/systm.h>
  41 #include <sys/device.h>
  42 #include <sys/reboot.h>
  43
  44 #include <machine/autoconf.h>
  45
  46 #include <next68k/dev/intiovar.h>
  47
  48 int     intiomatch(struct device *, struct cfdata *, void *);
  49 void    intioattach(struct device *, struct device *, void *);
  50 int     intioprint(void *, const char *);
  51 int     intiosearch(struct device *, struct cfdata *,
  52                     const int *, void *);
  53
  54 CFATTACH_DECL(intio, sizeof(struct device),
  55     intiomatch, intioattach, NULL, NULL);
  56
  57 #if 0
  58 struct cfdriver intio_cd = {
  59         NULL, "intio", DV_DULL
  60 };
  61 #endif
  62
  63 static int intio_attached = 0;
  64
  65 int
  66 intiomatch(struct device *parent, struct cfdata *match, void *aux)
  67 {
  68         /* Allow only one instance. */
  69         if (intio_attached)
  70                 return (0);
  71
  72         return (1);
  73 }
  74
  75 void
  76 intioattach(struct device *parent, struct device *self, void *aux)
  77 {
  78
  79         printf("\n");
  80
  81         /* Search for and attach children. */
  82         config_search_ia(intiosearch, self, "intio", aux);
  83
  84         intio_attached = 1;
  85 }
  86
  87 int
  88 intioprint(void *aux, const char *pnp)
  89 {
  90         struct intio_attach_args *ia = aux;
  91
  92         if (ia->ia_addr)
  93                 aprint_normal(" addr %p", ia->ia_addr);
  94
  95         return (UNCONF);
  96 }
  97
  98 int
  99 intiosearch(struct device *parent, struct cfdata *cf,
 100             const int *ldesc, void *aux)
 101 {
 102         struct mainbus_attach_args *mba = (struct mainbus_attach_args *) aux;
 103         struct intio_attach_args ia;
 104
 105         do {
 106                 ia.ia_addr = NULL;
 107                 ia.ia_bst = NEXT68K_INTIO_BUS_SPACE;
 108                 ia.ia_dmat = mba->mba_dmat;
 109
 110                 if (config_match(parent, cf, &ia) == 0)
 111                         break;
 112                 config_attach(parent, cf, &ia, intioprint);
 113         } while (cf->cf_fstate == FSTATE_STAR);
 114
 115         return (0);
 116 }