acpi_lid.c revision 121493 
1/*-
2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org>
3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
4 * Copyright (c) 2000 Michael Smith <msmith@freebd.org>
5 * Copyright (c) 2000 BSDi
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: head/sys/dev/acpica/acpi_lid.c 121493 2003-10-25 05:03:25Z njl $");
32
33#include "opt_acpi.h"
34#include <sys/param.h>
35#include <sys/kernel.h>
36#include <sys/bus.h>
37#include <sys/proc.h>
38
39#include "acpi.h"
40#include <dev/acpica/acpivar.h>
41
42/* Hooks for the ACPI CA debugging infrastructure */
43#define _COMPONENT	ACPI_BUTTON
44ACPI_MODULE_NAME("LID")
45
46struct acpi_lid_softc {
47    device_t	lid_dev;
48    ACPI_HANDLE	lid_handle;
49    int		lid_status;	/* open or closed */
50};
51
52static int	acpi_lid_probe(device_t dev);
53static int	acpi_lid_attach(device_t dev);
54static int	acpi_lid_suspend(device_t dev);
55static int	acpi_lid_resume(device_t dev);
56static void	acpi_lid_notify_status_changed(void *arg);
57static void 	acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify,
58					void *context);
59
60static device_method_t acpi_lid_methods[] = {
61    /* Device interface */
62    DEVMETHOD(device_probe,	acpi_lid_probe),
63    DEVMETHOD(device_attach,	acpi_lid_attach),
64    DEVMETHOD(device_suspend,	acpi_lid_suspend),
65    DEVMETHOD(device_resume,	acpi_lid_resume),
66
67    {0, 0}
68};
69
70static driver_t acpi_lid_driver = {
71    "acpi_lid",
72    acpi_lid_methods,
73    sizeof(struct acpi_lid_softc),
74};
75
76static devclass_t acpi_lid_devclass;
77DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0);
78
79static int
80acpi_lid_probe(device_t dev)
81{
82    if (acpi_get_type(dev) == ACPI_TYPE_DEVICE && !acpi_disabled("lid") &&
83	acpi_MatchHid(dev, "PNP0C0D")) {
84
85	device_set_desc(dev, "Control Method Lid Switch");
86	return (0);
87    }
88    return (ENXIO);
89}
90
91static int
92acpi_lid_attach(device_t dev)
93{
94    struct acpi_lid_softc	*sc;
95
96    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
97
98    sc = device_get_softc(dev);
99    sc->lid_dev = dev;
100    sc->lid_handle = acpi_get_handle(dev);
101
102    /* Install notification handler */
103    AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY,
104			     acpi_lid_notify_handler, sc);
105    acpi_device_enable_wake_capability(sc->lid_handle, 1);
106
107    return_VALUE (0);
108}
109
110static int
111acpi_lid_suspend(device_t dev)
112{
113    struct acpi_lid_softc	*sc;
114
115    sc = device_get_softc(dev);
116    acpi_device_enable_wake_event(sc->lid_handle);
117    return (0);
118}
119
120static int
121acpi_lid_resume(device_t dev)
122{
123    return (0);
124}
125
126static void
127acpi_lid_notify_status_changed(void *arg)
128{
129    struct acpi_lid_softc	*sc;
130    struct acpi_softc		*acpi_sc;
131    ACPI_STATUS			status;
132
133    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
134
135    sc = (struct acpi_lid_softc *)arg;
136
137    /*
138     * Evaluate _LID and check the return value, update lid status.
139     *	Zero:		The lid is closed
140     *	Non-zero:	The lid is open
141     */
142    status = acpi_EvaluateInteger(sc->lid_handle, "_LID", &sc->lid_status);
143    if (ACPI_FAILURE(status))
144	return_VOID;
145
146    acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
147    if (acpi_sc == NULL)
148        return_VOID;
149
150    ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n",
151		sc->lid_status ? "opened" : "closed");
152
153    acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
154
155    if (sc->lid_status == 0)
156	EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
157    else
158	EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
159
160    return_VOID;
161}
162
163/* XXX maybe not here */
164#define	ACPI_NOTIFY_STATUS_CHANGED	0x80
165
166static void
167acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
168{
169    struct acpi_lid_softc	*sc = (struct acpi_lid_softc *)context;
170
171    ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
172
173    switch (notify) {
174    case ACPI_NOTIFY_STATUS_CHANGED:
175	AcpiOsQueueForExecution(OSD_PRIORITY_LO,
176				acpi_lid_notify_status_changed, sc);
177	break;
178    default:
179	break;
180    }
181
182    return_VOID;
183}
184