acpi_isab.c revision 117339 
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 * $FreeBSD: head/sys/dev/acpica/acpi_isab.c 117339 2003-07-08 18:59:32Z jhb $
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>
37#include <sys/malloc.h>
38#include <sys/kernel.h>
39
40#include "acpi.h"
41
42#include <dev/acpica/acpivar.h>
43#include <isa/isavar.h>
44
45/*
46 * Hooks for the ACPI CA debugging infrastructure
47 */
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
56
57static int	acpi_isab_probe(device_t bus);
58static int	acpi_isab_attach(device_t bus);
59static int	acpi_isab_read_ivar(device_t dev, device_t child, int which,
60		    uintptr_t *result);
61
62static device_method_t acpi_isab_methods[] = {
63	/* Device interface */
64	DEVMETHOD(device_probe,		acpi_isab_probe),
65	DEVMETHOD(device_attach,	acpi_isab_attach),
66	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
67	DEVMETHOD(device_suspend,	bus_generic_suspend),
68	DEVMETHOD(device_resume,	bus_generic_resume),
69
70	/* Bus interface */
71	DEVMETHOD(bus_print_child,	bus_generic_print_child),
72	DEVMETHOD(bus_read_ivar,	acpi_isab_read_ivar),
73	DEVMETHOD(bus_alloc_resource,	bus_generic_alloc_resource),
74	DEVMETHOD(bus_release_resource,	bus_generic_release_resource),
75	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
76	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
77	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
78	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
79
80	{0, 0}
81};
82
83static driver_t acpi_isab_driver = {
84	"isab",
85	acpi_isab_methods,
86	sizeof(struct acpi_isab_softc),
87};
88
89DRIVER_MODULE(acpi_isab, acpi, acpi_isab_driver, isab_devclass, 0, 0);
90
91static int
92acpi_isab_probe(device_t dev)
93{
94
95	if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) &&
96	    !acpi_disabled("isa	") &&
97	    (acpi_MatchHid(dev, "PNP0A05") || acpi_MatchHid(dev, "PNP0A06"))) {
98		device_set_desc(dev, "ACPI Generic ISA bridge");
99		return(0);
100	}
101	return(ENXIO);
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