eisa_pci.c revision 69890 
1/*-
2 * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
3 * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
4 * Copyright (c) 2000 BSDi
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 *	$FreeBSD: head/sys/dev/pci/eisa_pci.c 69890 2000-12-12 03:33:02Z msmith $
31 */
32
33/*
34 * PCI:EISA bridge support
35 */
36
37#include <sys/param.h>
38#include <sys/kernel.h>
39#include <sys/bus.h>
40
41#include <pci/pcivar.h>
42#include <pci/pcireg.h>
43
44static int	eisab_probe(device_t dev);
45static int	eisab_attach(device_t dev);
46
47static device_method_t eisab_methods[] = {
48    /* Device interface */
49    DEVMETHOD(device_probe,		eisab_probe),
50    DEVMETHOD(device_attach,		eisab_attach),
51    DEVMETHOD(device_shutdown,		bus_generic_shutdown),
52    DEVMETHOD(device_suspend,		bus_generic_suspend),
53    DEVMETHOD(device_resume,		bus_generic_resume),
54
55    /* Bus interface */
56    DEVMETHOD(bus_print_child,		bus_generic_print_child),
57    DEVMETHOD(bus_alloc_resource,	bus_generic_alloc_resource),
58    DEVMETHOD(bus_release_resource,	bus_generic_release_resource),
59    DEVMETHOD(bus_activate_resource,	bus_generic_activate_resource),
60    DEVMETHOD(bus_deactivate_resource,	bus_generic_deactivate_resource),
61    DEVMETHOD(bus_setup_intr,		bus_generic_setup_intr),
62    DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
63
64    { 0, 0 }
65};
66
67static driver_t eisab_driver = {
68    "eisab",
69    eisab_methods,
70    0,
71};
72
73static devclass_t eisab_devclass;
74
75DRIVER_MODULE(eisab, pci, eisab_driver, eisab_devclass, 0, 0);
76
77static int
78eisab_probe(device_t dev)
79{
80    int		matched = 0;
81
82    /*
83     * Generic match by class/subclass.
84     */
85    if ((pci_get_class(dev) == PCIC_BRIDGE) &&
86	(pci_get_subclass(dev) == PCIS_BRIDGE_EISA))
87	matched = 1;
88
89    /*
90     * Some bridges don't correctly report their class.
91     */
92    switch (pci_get_devid(dev)) {
93    case 0x04828086:		/* reports PCI-HOST class (!) */
94	matched = 1;
95	break;
96    default:
97	break;
98    }
99
100    if (matched) {
101	device_set_desc(dev, "PCI-EISA bridge");
102	return(-10000);
103    }
104    return(ENXIO);
105}
106
107static int
108eisab_attach(device_t dev)
109{
110    device_t	child;
111
112    /*
113     * Attach an EISA bus.  Note that we can only have one EISA bus.
114     */
115    child = device_add_child(dev, "eisa", 0);
116    if (child != NULL)
117	bus_generic_attach(dev);
118
119    /*
120     * Attach an ISA bus as well (should this be a child of EISA?)
121     */
122    child = device_add_child(dev, "isa", 0);
123    if (child != NULL)
124	bus_generic_attach(dev);
125
126    return(0);
127}
128
129