isahint.c revision 78135 
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: head/sys/isa/isahint.c 78135 2001-06-12 09:40:04Z peter $
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 <isa/isavar.h>
35#include <machine/resource.h>
36
37static void
38isahint_add_device(device_t parent, const char *name, int unit)
39{
40	device_t	child;
41	int		sensitive, start, count, t;
42	int		order;
43
44	/* device-specific flag overrides any wildcard */
45	sensitive = 0;
46	if (resource_int_value(name, unit, "sensitive", &sensitive) != 0)
47		resource_int_value(name, -1, "sensitive", &sensitive);
48
49	if (sensitive)
50		order = ISA_ORDER_SENSITIVE;
51	else
52		order = ISA_ORDER_SPECULATIVE;
53
54	child = BUS_ADD_CHILD(parent, order, name, unit);
55	if (child == 0)
56		return;
57
58	start = 0;
59	count = 0;
60	resource_int_value(name, unit, "port", &start);
61	resource_int_value(name, unit, "portsize", &count);
62	if (start > 0 || count > 0)
63		bus_set_resource(child, SYS_RES_IOPORT, 0, start, count);
64
65	start = 0;
66	count = 0;
67	resource_int_value(name, unit, "maddr", &start);
68	resource_int_value(name, unit, "msize", &count);
69	if (start > 0 || count > 0)
70		bus_set_resource(child, SYS_RES_MEMORY, 0, start, count);
71
72	if (resource_int_value(name, unit, "irq", &start) == 0 && start > 0)
73		bus_set_resource(child, SYS_RES_IRQ, 0, start, 1);
74
75	if (resource_int_value(name, unit, "drq", &start) == 0 && start >= 0)
76		bus_set_resource(child, SYS_RES_DRQ, 0, start, 1);
77
78	if (resource_int_value(name, unit, "flags", &t) == 0)
79		device_set_flags(child, t);
80
81	if (resource_int_value(name, unit, "disabled", &t) == 0 && t != 0)
82		device_disable(child);
83}
84
85static void
86isahint_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		if (strcmp(dname, "atkbd") == 0)
100			continue;	/* old GENERIC kludge */
101		isahint_add_device(parent, dname, dunit);
102	}
103
104	/*
105	 * and isa?
106	 */
107	i = 0;
108	while ((resource_find_match(&i, &dname, &dunit, "at", "isa")) == 0) {
109		if (strcmp(dname, "atkbd") == 0)
110			continue;	/* old GENERIC kludge */
111		isahint_add_device(parent, dname, dunit);
112	}
113}
114
115static device_method_t isahint_methods[] = {
116	/* Device interface */
117	DEVMETHOD(device_identify,	isahint_identify),
118
119	{ 0, 0 }
120};
121
122static driver_t isahint_driver = {
123	"hint",
124	isahint_methods,
125	1,			/* no softc */
126};
127
128static devclass_t hint_devclass;
129
130DRIVER_MODULE(isahint, isa, isahint_driver, hint_devclass, 0, 0);
131