freebsd-dev/sys/isa/isahint.c
Doug Rabson bea6af4d31 * Change device_add_child_after() to device_add_child_ordered() which is
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.
1999-05-28 09:25:16 +00:00

135 lines
4.0 KiB
C

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