sys/bus/isa/isahint.c

   1 /*-
   2  * Copyright (c) 1999 Doug Rabson
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sys/isa/isahint.c,v 1.8.2.1 2001/03/21 11:18:25 nyan Exp $
  27  */
  28
  29 #include <sys/param.h>
  30 #include <sys/systm.h>
  31 #include <sys/kernel.h>
  32 #include <sys/bus.h>
  33 #include <sys/module.h>
  34 #include <sys/machintr.h>
  35
  36 #include "isavar.h"
  37
  38 static void
  39 isahint_add_device(device_t parent, const char *name, int unit)
  40 {
  41         device_t        child;
  42         int             sensitive, start, count, t;
  43         int             order;
  44
  45         /* device-specific flag overrides any wildcard */
  46         sensitive = 0;
  47         if (resource_int_value(name, unit, "sensitive", &sensitive) != 0)
  48                 resource_int_value(name, -1, "sensitive", &sensitive);
  49
  50         if (sensitive)
  51                 order = ISA_ORDER_SENSITIVE;
  52         else
  53                 order = ISA_ORDER_SPECULATIVE;
  54
  55         child = BUS_ADD_CHILD(parent, parent, order, name, unit);
  56         if (child == 0)
  57                 return;
  58
  59         start = 0;
  60         count = 0;
  61         resource_int_value(name, unit, "port", &start);
  62         resource_int_value(name, unit, "portsize", &count);
  63         if (start > 0 || count > 0)
  64                 bus_set_resource(child, SYS_RES_IOPORT, 0, start, count, -1);
  65
  66         start = 0;
  67         count = 0;
  68         resource_int_value(name, unit, "maddr", &start);
  69         resource_int_value(name, unit, "msize", &count);
  70         if (start > 0 || count > 0)
  71                 bus_set_resource(child, SYS_RES_MEMORY, 0, start, count, -1);
  72
  73         if (resource_int_value(name, unit, "irq", &start) == 0 && start > 0) {
  74                 bus_set_resource(child, SYS_RES_IRQ, 0, start, 1,
  75                     machintr_legacy_intr_cpuid(start));
  76         }
  77
  78         if (resource_int_value(name, unit, "drq", &start) == 0 && start >= 0)
  79                 bus_set_resource(child, SYS_RES_DRQ, 0, start, 1, -1);
  80
  81         if (resource_int_value(name, unit, "flags", &t) == 0)
  82                 device_set_flags(child, t);
  83
  84         if (resource_int_value(name, unit, "disabled", &t) == 0 && t != 0)
  85                 device_disable(child);
  86 }
  87
  88 static int
  89 isahint_identify(driver_t *driver, device_t parent)
  90 {
  91         int i;
  92         static char buf[] = "isaXXX";
  93
  94         /*
  95          * If the parent bus is already attached we are being called to
  96          * rescan.  We do not suppot rescanning the hints, just return
  97          * success.
  98          */
  99         if (device_get_state(parent) == DS_ATTACHED)
 100                 return(0);
 101         if (device_get_state(parent) == DS_INPROGRESS)
 102                 return(0);
 103
 104         /*
 105          * Add all devices configured to be attached to parent.
 106          */
 107         ksprintf(buf, "isa%d", device_get_unit(parent));
 108         for (i = resource_query_string(-1, "at", buf);
 109              i != -1;
 110              i = resource_query_string(i, "at", buf)) {
 111                 if (strcmp(resource_query_name(i), "atkbd") == 0)
 112                         continue;       /* old GENERIC kludge */
 113                 isahint_add_device(parent,
 114                                    resource_query_name(i),
 115                                    resource_query_unit(i));
 116         }
 117
 118         /*
 119          * and isa?
 120          */
 121         for (i = resource_query_string(-1, "at", "isa");
 122              i != -1;
 123              i = resource_query_string(i, "at", "isa")) {
 124                 if (strcmp(resource_query_name(i), "atkbd") == 0)
 125                         continue;       /* old GENERIC kludge */
 126                 isahint_add_device(parent,
 127                                    resource_query_name(i),
 128                                    resource_query_unit(i));
 129         }
 130         return(0);
 131 }
 132
 133 static device_method_t isahint_methods[] = {
 134         /* Device interface */
 135         DEVMETHOD(device_identify,      isahint_identify),
 136
 137         DEVMETHOD_END
 138 };
 139
 140 static driver_t isahint_driver = {
 141         "hint",
 142         isahint_methods,
 143         1,                      /* no softc */
 144 };
 145
 146 /*
 147  * This will cause the identify routine to be called for any isa bus
 148  * attached to the system.
 149  */
 150 static devclass_t hint_devclass;
 151
 152 DRIVER_MODULE(isahint, isa, isahint_driver, hint_devclass, NULL, NULL);