sys/arch/acorn26/iobus/iobus.c

   1 /* $NetBSD: iobus.c,v 1.14 2006/09/30 16:30:10 bjh21 Exp $ */
   2 /*-
   3  * Copyright (c) 1998 Ben Harris
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28 /*
  29  * iobus.c - when the IORQ* calls...
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: iobus.c,v 1.14 2006/09/30 16:30:10 bjh21 Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/device.h>
  37 #include <sys/systm.h>
  38
  39 #include <machine/bus.h>
  40 #include <machine/memcreg.h>
  41
  42 #include <arch/acorn26/iobus/iobusvar.h>
  43
  44 #include "locators.h"
  45
  46 static int iobus_match(device_t parent, cfdata_t cf, void *aux);
  47 static void iobus_attach(device_t parent, device_t self, void *aux);
  48 static int iobus_search_ioc(device_t parent, cfdata_t cf,
  49                             const int *ldesc, void *aux);
  50 static int iobus_search(device_t parent, cfdata_t cf,
  51                         const int *ldesc, void *aux);
  52 static int iobus_print(void *aux, const char *pnp);
  53
  54 CFATTACH_DECL_NEW(iobus, 0, iobus_match, iobus_attach, NULL, NULL);
  55
  56 device_t the_iobus;
  57
  58 static int
  59 iobus_match(device_t parent, cfdata_t cf, void *aux)
  60 {
  61
  62         /* There can be only one! */
  63         if (the_iobus == NULL)
  64                 return 1;
  65         return 0;
  66 }
  67
  68 static void
  69 iobus_attach(device_t parent, device_t self, void *aux)
  70 {
  71
  72         the_iobus = self;
  73         aprint_normal("\n");
  74
  75         /*
  76          * Always look for the IOC first, since stuff under there determines
  77          * what else is present.
  78          */
  79         config_search_ia(iobus_search_ioc, self, "iobus", NULL);
  80         config_search_ia(iobus_search, self, "iobus", NULL);
  81 }
  82
  83 extern struct bus_space iobus_bs_tag;
  84
  85 static int
  86 iobus_search_ioc(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
  87 {
  88         struct iobus_attach_args ioa;
  89
  90         ioa.ioa_tag = &iobus_bs_tag;
  91         ioa.ioa_base = (bus_addr_t)MEMC_IO_BASE + cf->cf_loc[IOBUSCF_BASE];
  92         if (strcmp(cf->cf_name, "ioc") == 0 &&
  93             config_match(parent, cf, &ioa) > 0)
  94                 config_attach(parent, cf, &ioa, iobus_print);
  95
  96         return 0;
  97 }
  98
  99 static int
 100 iobus_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
 101 {
 102         struct iobus_attach_args ioa;
 103
 104         ioa.ioa_tag = &iobus_bs_tag;
 105         ioa.ioa_base = (bus_addr_t)MEMC_IO_BASE + cf->cf_loc[IOBUSCF_BASE];
 106         if (config_match(parent, cf, &ioa) > 0)
 107                 config_attach(parent, cf, &ioa, iobus_print);
 108
 109         return 0;
 110 }
 111
 112 static int
 113 iobus_print(void *aux, const char *pnp)
 114 {
 115         struct iobus_attach_args *ioa = aux;
 116
 117         if (ioa->ioa_base != IOBUSCF_BASE_DEFAULT)
 118                 aprint_normal(" base 0x%06lx",
 119                     ioa->ioa_base - (bus_addr_t)MEMC_IO_BASE);
 120         return UNCONF;
 121 }