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  * $DragonFly: src/sys/bus/isa/isahint.c,v 1.8 2007/05/01 00:05:15 dillon Exp $
  28  */
  29
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/kernel.h>
  33 #include <sys/bus.h>
  34 #include <sys/module.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);
  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);
  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
  76         if (resource_int_value(name, unit, "drq", &start) == 0 && start >= 0)
  77                 bus_set_resource(child, SYS_RES_DRQ, 0, start, 1);
  78
  79         if (resource_int_value(name, unit, "flags", &t) == 0)
  80                 device_set_flags(child, t);
  81
  82         if (resource_int_value(name, unit, "disabled", &t) == 0 && t != 0)
  83                 device_disable(child);
  84 }
  85
  86 static int
  87 isahint_identify(driver_t *driver, device_t parent)
  88 {
  89         int i;
  90         static char buf[] = "isaXXX";
  91
  92         /*
  93          * If the parent bus is already attached we are being called to
  94          * rescan.  We do not suppot rescanning the hints, just return
  95          * success.
  96          */
  97         if (device_get_state(parent) == DS_ATTACHED)
  98                 return(0);
  99         if (device_get_state(parent) == DS_INPROGRESS)
 100                 return(0);
 101
 102         /*
 103          * Add all devices configured to be attached to parent.
 104          */
 105         ksprintf(buf, "isa%d", device_get_unit(parent));
 106         for (i = resource_query_string(-1, "at", buf);
 107              i != -1;
 108              i = resource_query_string(i, "at", buf)) {
 109                 if (strcmp(resource_query_name(i), "atkbd") == 0)
 110                         continue;       /* old GENERIC kludge */
 111                 isahint_add_device(parent,
 112                                    resource_query_name(i),
 113                                    resource_query_unit(i));
 114         }
 115
 116         /*
 117          * and isa?
 118          */
 119         for (i = resource_query_string(-1, "at", "isa");
 120              i != -1;
 121              i = resource_query_string(i, "at", "isa")) {
 122                 if (strcmp(resource_query_name(i), "atkbd") == 0)
 123                         continue;       /* old GENERIC kludge */
 124                 isahint_add_device(parent,
 125                                    resource_query_name(i),
 126                                    resource_query_unit(i));
 127         }
 128         return(0);
 129 }
 130
 131 static device_method_t isahint_methods[] = {
 132         /* Device interface */
 133         DEVMETHOD(device_identify,      isahint_identify),
 134
 135         { 0, 0 }
 136 };
 137
 138 static driver_t isahint_driver = {
 139         "hint",
 140         isahint_methods,
 141         1,                      /* no softc */
 142 };
 143
 144 /*
 145  * This will cause the identify routine to be called for any isa bus
 146  * attached to the system.
 147  */
 148 static devclass_t hint_devclass;
 149
 150 DRIVER_MODULE(isahint, isa, isahint_driver, hint_devclass, 0, 0);