acpi_lid.c revision 91123 
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 *	$FreeBSD: head/sys/dev/acpica/acpi_lid.c 91123 2002-02-23 05:26:45Z msmith $
30 */
31
32#include "opt_acpi.h"
33#include <sys/param.h>
34#include <sys/kernel.h>
35#include <sys/bus.h>
36#include <sys/lock.h>
37#include <sys/mutex.h>
38#include <sys/proc.h>
39
40#include "acpi.h"
41
42#include <dev/acpica/acpivar.h>
43
44/*
45 * Hooks for the ACPI CA debugging infrastructure
46 */
47#define _COMPONENT	ACPI_BUTTON
48ACPI_MODULE_NAME("LID")
49
50struct acpi_lid_softc {
51    device_t	lid_dev;
52    ACPI_HANDLE	lid_handle;
53    int		lid_status;	/* open or closed */
54};
55
56static int	acpi_lid_probe(device_t dev);
57static int	acpi_lid_attach(device_t dev);
58static void	acpi_lid_notify_status_changed(void *arg);
59static void 	acpi_lid_notify_handler(ACPI_HANDLE h,UINT32 notify, void *context);
60
61static device_method_t acpi_lid_methods[] = {
62    /* Device interface */
63    DEVMETHOD(device_probe,	acpi_lid_probe),
64    DEVMETHOD(device_attach,	acpi_lid_attach),
65
66    {0, 0}
67};
68
69static driver_t acpi_lid_driver = {
70    "acpi_lid",
71    acpi_lid_methods,
72    sizeof(struct acpi_lid_softc),
73};
74
75static devclass_t acpi_lid_devclass;
76DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0);
77
78static int
79acpi_lid_probe(device_t dev)
80{
81    if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) &&
82	!acpi_disabled("lid") &&
83	acpi_MatchHid(dev, "PNP0C0D")) {
84	device_set_desc(dev, "Control Method Lid Switch");
85	return(0);
86    }
87    return(ENXIO);
88}
89
90static int
91acpi_lid_attach(device_t dev)
92{
93    struct acpi_lid_softc	*sc;
94
95    ACPI_FUNCTION_TRACE(__func__);
96
97    sc = device_get_softc(dev);
98    sc->lid_dev = dev;
99    sc->lid_handle = acpi_get_handle(dev);
100
101    /*
102     * Install notification handler
103     */
104    AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, acpi_lid_notify_handler, sc);
105    return_VALUE(0);
106}
107
108static void
109acpi_lid_notify_status_changed(void *arg)
110{
111    struct acpi_lid_softc	*sc;
112    struct acpi_softc		*acpi_sc;
113
114    ACPI_FUNCTION_TRACE(__func__);
115
116    sc = (struct acpi_lid_softc *)arg;
117
118    /*
119     * Evaluate _LID and check the return value, update lid status.
120     *	Zero:		The lid is closed
121     *	Non-zero:	The lid is open
122     */
123    if (ACPI_FAILURE(acpi_EvaluateInteger(sc->lid_handle, "_LID", &sc->lid_status)))
124	return_VOID;
125
126    acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
127    if (acpi_sc == NULL) {
128        return_VOID;
129    }
130
131    ACPI_VPRINT(sc->lid_dev, acpi_sc,
132	"Lid %s\n", sc->lid_status ? "opened" : "closed");
133
134    if (sc->lid_status == 0) {
135	EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
136    } else {
137	EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
138    }
139
140    return_VOID;
141}
142
143/* XXX maybe not here */
144#define	ACPI_NOTIFY_STATUS_CHANGED	0x80
145
146static void
147acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
148{
149    struct acpi_lid_softc	*sc = (struct acpi_lid_softc *)context;
150
151    ACPI_FUNCTION_TRACE_U32(__func__, notify);
152
153    switch (notify) {
154    case ACPI_NOTIFY_STATUS_CHANGED:
155	AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_lid_notify_status_changed, sc);
156	break;
157    default:
158	break;		/* unknown notification value */
159    }
160    return_VOID;
161}
162
163