xref: /freebsd/sys/isa/isahint.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
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);
125