sys/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
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  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 #include <isa/isavar.h>
  36 #include <machine/resource.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;
  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, 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_disabled(name, unit))
  80                 device_disable(child);
  81
  82         isa_set_configattr(child, (isa_get_configattr(child)|ISACFGATTR_HINTS));
  83 }
  84
  85 static void
  86 isahint_identify(driver_t *driver, device_t parent)
  87 {
  88         int i;
  89         static char buf[] = "isaXXX";
  90         const char *dname;
  91         int dunit;
  92
  93         /*
  94          * Add all devices configured to be attached to parent.
  95          */
  96         sprintf(buf, "isa%d", device_get_unit(parent));
  97         i = 0;
  98         while (resource_find_match(&i, &dname, &dunit, "at", buf) == 0)
  99                 isahint_add_device(parent, dname, dunit);
 100
 101         /*
 102          * and isa?
 103          */
 104         i = 0;
 105         while (resource_find_match(&i, &dname, &dunit, "at", "isa") == 0)
 106                 isahint_add_device(parent, dname, dunit);
 107 }
 108
 109 static device_method_t isahint_methods[] = {
 110         /* Device interface */
 111         DEVMETHOD(device_identify,      isahint_identify),
 112
 113         { 0, 0 }
 114 };
 115
 116 static driver_t isahint_driver = {
 117         "hint",
 118         isahint_methods,
 119         1,                      /* no softc */
 120 };
 121
 122 static devclass_t hint_devclass;
 123
 124 DRIVER_MODULE(isahint, isa, isahint_driver, hint_devclass, 0, 0);