kernel: Use NULL for DRIVER_MODULE()'s evh & arg (which are pointers).
[dragonfly.git] / sys / dev / acpica5 / acpi_isab.c
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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.
32af04f7 25 *
10f97674 26 * $FreeBSD: src/sys/dev/acpica/acpi_isab.c,v 1.11 2009/06/05 18:44:36 jkim
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27 */
28
29/*
30 * ISA Bridge driver for Generic ISA Bus Devices. See section 10.7 of the
31 * ACPI 2.0a specification for details on this device.
32 */
33
34#include "opt_acpi.h"
35#include <sys/param.h>
36#include <sys/bus.h>
5ed44076 37#include <sys/kernel.h>
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38#include <sys/malloc.h>
39#include <sys/module.h>
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40
41#include "acpi.h"
da42c799 42#include "accommon.h"
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43
44#include <dev/acpica5/acpivar.h>
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45#include <bus/isa/isavar.h>
46
49e48b8a 47/* Hooks for the ACPI CA debugging infrastructure. */
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48#define _COMPONENT ACPI_BUS
49ACPI_MODULE_NAME("ISA_ACPI")
50
51struct acpi_isab_softc {
52 device_t ap_dev;
53 ACPI_HANDLE ap_handle;
54};
55
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56static int acpi_isab_probe(device_t bus);
57static int acpi_isab_attach(device_t bus);
58static int acpi_isab_read_ivar(device_t dev, device_t child, int which,
59 uintptr_t *result);
60
61static device_method_t acpi_isab_methods[] = {
62 /* Device interface */
63 DEVMETHOD(device_probe, acpi_isab_probe),
64 DEVMETHOD(device_attach, acpi_isab_attach),
65 DEVMETHOD(device_shutdown, bus_generic_shutdown),
66 DEVMETHOD(device_suspend, bus_generic_suspend),
67 DEVMETHOD(device_resume, bus_generic_resume),
68
69 /* Bus interface */
70 DEVMETHOD(bus_print_child, bus_generic_print_child),
71 DEVMETHOD(bus_read_ivar, acpi_isab_read_ivar),
72 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
73 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
74 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
75 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
76 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
77 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
78
79 {0, 0}
80};
81
82static driver_t acpi_isab_driver = {
83 "isab",
84 acpi_isab_methods,
85 sizeof(struct acpi_isab_softc),
86};
87
aa2b9d05 88DRIVER_MODULE(acpi_isab, acpi, acpi_isab_driver, isab_devclass, NULL, NULL);
f9d8cd12 89MODULE_DEPEND(acpi_isab, acpi, 1, 1, 1);
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90
91static int
92acpi_isab_probe(device_t dev)
93{
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94 static char *isa_ids[] = { "PNP0A05", "PNP0A06", NULL };
95
96 if (acpi_disabled("isab") ||
97 ACPI_ID_PROBE(device_get_parent(dev), dev, isa_ids) == NULL ||
98 devclass_get_device(isab_devclass, 0) != dev)
99 return (ENXIO);
100
101 device_set_desc(dev, "ACPI Generic ISA bridge");
102 return (0);
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103}
104
105static int
106acpi_isab_attach(device_t dev)
107{
108 struct acpi_isab_softc *sc;
109
110 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
111
112 sc = device_get_softc(dev);
113 sc->ap_dev = dev;
114 sc->ap_handle = acpi_get_handle(dev);
115
116 return (isab_attach(dev));
117}
118
119static int
120acpi_isab_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
121{
122 struct acpi_isab_softc *sc = device_get_softc(dev);
123
124 switch (which) {
49e48b8a 125 case ACPI_IVAR_HANDLE:
5ed44076 126 *result = (uintptr_t)sc->ap_handle;
49e48b8a 127 return (0);
5ed44076 128 }
49e48b8a 129 return (ENOENT);
5ed44076 130}