bea6af4d31
easier to use and more flexible. * Change BUS_ADD_CHILD to take an order argument instead of a place. * Define a partial ordering for isa devices so that sensitive devices are probed before non-sensitive ones.
135 lines
4.0 KiB
C
135 lines
4.0 KiB
C
/*-
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* Copyright (c) 1999 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: isahint.c,v 1.2 1999/05/22 15:18:26 dfr Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/module.h>
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#include <isa/isavar.h>
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#include <machine/resource.h>
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static void
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isahint_add_device(device_t parent, const char *name, int unit)
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{
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device_t child;
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int sensitive, start, count, t;
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int order;
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/* device-specific flag overrides any wildcard */
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sensitive = 0;
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if (resource_int_value(name, unit, "sensitive", &sensitive) != 0)
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resource_int_value(name, -1, "sensitive", &sensitive);
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if (sensitive)
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order = ISA_ORDER_SENSITIVE;
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else
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order = ISA_ORDER_SPECULATIVE;
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child = BUS_ADD_CHILD(parent, order, name, unit);
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if (child == 0)
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return;
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start = 0;
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count = 0;
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if (resource_int_value(name, unit, "port", &start) == 0
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|| resource_int_value(name, unit, "portsize", &count) == 0)
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ISA_SET_RESOURCE(parent, child, SYS_RES_IOPORT, 0,
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start, count);
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start = 0;
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count = 0;
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if (resource_int_value(name, unit, "maddr", &start) == 0
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|| resource_int_value(name, unit, "msize", &count) == 0)
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ISA_SET_RESOURCE(parent, child, SYS_RES_MEMORY, 0,
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start, count);
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if (resource_int_value(name, unit, "irq", &start) == 0)
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ISA_SET_RESOURCE(parent, child, SYS_RES_IRQ, 0, start, 1);
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if (resource_int_value(name, unit, "drq", &start) == 0)
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ISA_SET_RESOURCE(parent, child, SYS_RES_DRQ, 0, start, 1);
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if (resource_int_value(name, unit, "flags", &t) == 0)
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isa_set_flags(child, t);
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if (resource_int_value(name, unit, "disabled", &t) == 0 && t != 0)
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device_disable(child);
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}
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static void
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isahint_identify(driver_t *driver, device_t parent)
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{
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int i;
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static char buf[] = "isaXXX";
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/*
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* Add all devices configured to be attached to parent.
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*/
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sprintf(buf, "isa%d", device_get_unit(parent));
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for (i = resource_query_string(-1, "at", buf);
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i != -1;
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i = resource_query_string(i, "at", buf)) {
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if (strcmp(resource_query_name(i), "atkbd") == 0)
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continue; /* old GENERIC kludge */
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isahint_add_device(parent,
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resource_query_name(i),
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resource_query_unit(i));
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}
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/*
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* and isa?
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*/
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for (i = resource_query_string(-1, "at", "isa");
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i != -1;
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i = resource_query_string(i, "at", "isa")) {
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if (strcmp(resource_query_name(i), "atkbd") == 0)
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continue; /* old GENERIC kludge */
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isahint_add_device(parent,
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resource_query_name(i),
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resource_query_unit(i));
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}
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}
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static device_method_t isahint_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, isahint_identify),
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{ 0, 0 }
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};
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static driver_t isahint_driver = {
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"hint",
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isahint_methods,
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1, /* no softc */
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};
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static devclass_t hint_devclass;
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DRIVER_MODULE(isahint, isa, isahint_driver, hint_devclass, 0, 0);
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