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 <isa/isa_common.h>
37#include <machine/resource.h>
38
39void
40isa_hinted_child(device_t parent, const char *name, int unit)
41{
42	device_t	child;
43	int		sensitive, start, count;
44	int		order;
45
46	/* device-specific flag overrides any wildcard */
47	sensitive = 0;
48	if (resource_int_value(name, unit, "sensitive", &sensitive) != 0)
49		resource_int_value(name, -1, "sensitive", &sensitive);
50
51	if (sensitive)
52		order = ISA_ORDER_SENSITIVE;
53	else
54		order = ISA_ORDER_SPECULATIVE;
55
56	child = BUS_ADD_CHILD(parent, order, name, unit);
57	if (child == 0)
58		return;
59
60	start = 0;
61	count = 0;
62	resource_int_value(name, unit, "port", &start);
63	resource_int_value(name, unit, "portsize", &count);
64	if (start > 0 || count > 0)
65		bus_set_resource(child, SYS_RES_IOPORT, 0, start, count);
66
67	start = 0;
68	count = 0;
69	resource_int_value(name, unit, "maddr", &start);
70	resource_int_value(name, unit, "msize", &count);
71	if (start > 0 || count > 0)
72		bus_set_resource(child, SYS_RES_MEMORY, 0, start, count);
73
74	if (resource_int_value(name, unit, "irq", &start) == 0 && start > 0)
75		bus_set_resource(child, SYS_RES_IRQ, 0, start, 1);
76
77	if (resource_int_value(name, unit, "drq", &start) == 0 && start >= 0)
78		bus_set_resource(child, SYS_RES_DRQ, 0, start, 1);
79
80	if (resource_disabled(name, unit))
81		device_disable(child);
82
83	isa_set_configattr(child, (isa_get_configattr(child)|ISACFGATTR_HINTS));
84}
85
86static int
87isa_match_resource_hint(device_t dev, int type, long value)
88{
89	struct isa_device* idev = DEVTOISA(dev);
90	struct resource_list *rl = &idev->id_resources;
91	struct resource_list_entry *rle;
92
93	STAILQ_FOREACH(rle, rl, link) {
94		if (rle->type != type)
95			continue;
96		if (rle->start <= value && rle->end >= value)
97			return (1);
98	}
99	return (0);
100}
101
102void
103isa_hint_device_unit(device_t bus, device_t child, const char *name, int *unitp)
104{
105	const char *s;
106	long value;
107	int line, matches, unit;
108
109	line = 0;
110	for (;;) {
111		if (resource_find_dev(&line, name, &unit, "at", NULL) != 0)
112			break;
113
114		/* Must have an "at" for isa. */
115		resource_string_value(name, unit, "at", &s);
116		if (!(strcmp(s, device_get_nameunit(bus)) == 0 ||
117		    strcmp(s, device_get_name(bus)) == 0))
118			continue;
119
120		/*
121		 * Check for matching resources.  We must have at
122		 * least one match.  Since I/O and memory resources
123		 * cannot be shared, if we get a match on either of
124		 * those, ignore any mismatches in IRQs or DRQs.
125		 *
126		 * XXX: We may want to revisit this to be more lenient
127		 * and wire as long as it gets one match.
128		 */
129		matches = 0;
130		if (resource_long_value(name, unit, "port", &value) == 0) {
131			/*
132			 * Floppy drive controllers are notorious for
133			 * having a wide variety of resources not all
134			 * of which include the first port that is
135			 * specified by the hint (typically 0x3f0)
136			 * (see the comment above
137			 * fdc_isa_alloc_resources() in fdc_isa.c).
138			 * However, they do all seem to include port +
139			 * 2 (e.g. 0x3f2) so for a floppy device, look
140			 * for 'value + 2' in the port resources
141			 * instead of the hint value.
142			 */
143			if (strcmp(name, "fdc") == 0)
144				value += 2;
145			if (isa_match_resource_hint(child, SYS_RES_IOPORT,
146			    value))
147				matches++;
148			else
149				continue;
150		}
151		if (resource_long_value(name, unit, "maddr", &value) == 0) {
152			if (isa_match_resource_hint(child, SYS_RES_MEMORY,
153			    value))
154				matches++;
155			else
156				continue;
157		}
158		if (matches > 0)
159			goto matched;
160		if (resource_long_value(name, unit, "irq", &value) == 0) {
161			if (isa_match_resource_hint(child, SYS_RES_IRQ, value))
162				matches++;
163			else
164				continue;
165		}
166		if (resource_long_value(name, unit, "drq", &value) == 0) {
167			if (isa_match_resource_hint(child, SYS_RES_DRQ, value))
168				matches++;
169			else
170				continue;
171		}
172
173	matched:
174		if (matches > 0) {
175			/* We have a winner! */
176			*unitp = unit;
177			break;
178		}
179	}
180}
181