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
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD$");
33
34/*
35 * PCI:EISA bridge support
36 */
37
38#include <sys/param.h>
39#include <sys/kernel.h>
40#include <sys/module.h>
41#include <sys/bus.h>
42
43#include <dev/pci/pcivar.h>
44#include <dev/pci/pcireg.h>
45
46static int	eisab_probe(device_t dev);
47static int	eisab_attach(device_t dev);
48
49static device_method_t eisab_methods[] = {
50    /* Device interface */
51    DEVMETHOD(device_probe,		eisab_probe),
52    DEVMETHOD(device_attach,		eisab_attach),
53    DEVMETHOD(device_shutdown,		bus_generic_shutdown),
54    DEVMETHOD(device_suspend,		bus_generic_suspend),
55    DEVMETHOD(device_resume,		bus_generic_resume),
56
57    /* Bus interface */
58    DEVMETHOD(bus_alloc_resource,	bus_generic_alloc_resource),
59    DEVMETHOD(bus_release_resource,	bus_generic_release_resource),
60    DEVMETHOD(bus_activate_resource,	bus_generic_activate_resource),
61    DEVMETHOD(bus_deactivate_resource,	bus_generic_deactivate_resource),
62    DEVMETHOD(bus_setup_intr,		bus_generic_setup_intr),
63    DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
64
65    DEVMETHOD_END
66};
67
68static driver_t eisab_driver = {
69    "eisab",
70    eisab_methods,
71    0,
72};
73
74static devclass_t eisab_devclass;
75
76DRIVER_MODULE(eisab, pci, eisab_driver, eisab_devclass, 0, 0);
77
78static int
79eisab_probe(device_t dev)
80{
81    int		matched = 0;
82
83    /*
84     * Generic match by class/subclass.
85     */
86    if ((pci_get_class(dev) == PCIC_BRIDGE) &&
87	(pci_get_subclass(dev) == PCIS_BRIDGE_EISA))
88	matched = 1;
89
90    /*
91     * Some bridges don't correctly report their class.
92     */
93    switch (pci_get_devid(dev)) {
94    case 0x04828086:		/* may show up as PCI-HOST or 0:0 */
95	matched = 1;
96	break;
97    default:
98	break;
99    }
100
101    if (matched) {
102	device_set_desc(dev, "PCI-EISA bridge");
103	return(-10000);
104    }
105    return(ENXIO);
106}
107
108static int
109eisab_attach(device_t dev)
110{
111    /*
112     * Attach an EISA bus.  Note that we can only have one EISA bus.
113     */
114    if (!devclass_get_device(devclass_find("eisa"), 0))
115	device_add_child(dev, "eisa", -1);
116
117    /*
118     * Attach an ISA bus as well, since the EISA bus may have ISA
119     * cards installed, and we may have no EISA support in the system.
120     */
121    if (!devclass_get_device(devclass_find("isa"), 0))
122	device_add_child(dev, "isa", -1);
123
124    bus_generic_attach(dev);
125
126    return(0);
127}
128