acpi_isab.c revision 150003 
1/*-
2 * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
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: head/sys/dev/acpica/acpi_isab.c 150003 2005-09-11 18:39:03Z obrien $");
29
30/*
31 * ISA Bridge driver for Generic ISA Bus Devices.  See section 10.7 of the
32 * ACPI 2.0a specification for details on this device.
33 */
34
35#include "opt_acpi.h"
36#include <sys/param.h>
37#include <sys/bus.h>
38#include <sys/kernel.h>
39#include <sys/malloc.h>
40#include <sys/module.h>
41
42#include <contrib/dev/acpica/acpi.h>
43#include <dev/acpica/acpivar.h>
44#include <isa/isavar.h>
45
46/* Hooks for the ACPI CA debugging infrastructure. */
47#define _COMPONENT	ACPI_BUS
48ACPI_MODULE_NAME("ISA_ACPI")
49
50struct acpi_isab_softc {
51	device_t	ap_dev;
52	ACPI_HANDLE	ap_handle;
53};
54
55static int	acpi_isab_probe(device_t bus);
56static int	acpi_isab_attach(device_t bus);
57static int	acpi_isab_read_ivar(device_t dev, device_t child, int which,
58		    uintptr_t *result);
59
60static device_method_t acpi_isab_methods[] = {
61	/* Device interface */
62	DEVMETHOD(device_probe,		acpi_isab_probe),
63	DEVMETHOD(device_attach,	acpi_isab_attach),
64	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
65	DEVMETHOD(device_suspend,	bus_generic_suspend),
66	DEVMETHOD(device_resume,	bus_generic_resume),
67
68	/* Bus interface */
69	DEVMETHOD(bus_print_child,	bus_generic_print_child),
70	DEVMETHOD(bus_read_ivar,	acpi_isab_read_ivar),
71	DEVMETHOD(bus_alloc_resource,	bus_generic_alloc_resource),
72	DEVMETHOD(bus_release_resource,	bus_generic_release_resource),
73	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
74	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
75	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
76	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
77
78	{0, 0}
79};
80
81static driver_t acpi_isab_driver = {
82	"isab",
83	acpi_isab_methods,
84	sizeof(struct acpi_isab_softc),
85};
86
87DRIVER_MODULE(acpi_isab, acpi, acpi_isab_driver, isab_devclass, 0, 0);
88MODULE_DEPEND(acpi_isab, acpi, 1, 1, 1);
89
90static int
91acpi_isab_probe(device_t dev)
92{
93	static char *isa_ids[] = { "PNP0A05", "PNP0A06", NULL };
94
95	if (acpi_disabled("isab") ||
96	    ACPI_ID_PROBE(device_get_parent(dev), dev, isa_ids) == NULL ||
97	    devclass_get_device(isab_devclass, 0) != dev)
98		return (ENXIO);
99
100	device_set_desc(dev, "ACPI Generic ISA bridge");
101	return (0);
102}
103
104static int
105acpi_isab_attach(device_t dev)
106{
107	struct acpi_isab_softc *sc;
108
109	ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
110
111	sc = device_get_softc(dev);
112	sc->ap_dev = dev;
113	sc->ap_handle = acpi_get_handle(dev);
114
115	return (isab_attach(dev));
116}
117
118static int
119acpi_isab_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
120{
121	struct acpi_isab_softc *sc = device_get_softc(dev);
122
123	switch (which) {
124	case ACPI_IVAR_HANDLE:
125		*result = (uintptr_t)sc->ap_handle;
126		return (0);
127	}
128	return (ENOENT);
129}
130