acpi_button.c revision 97274 
1/*-
2 * Copyright (c) 2000 Mitsaru IWASAKI <iwasaki@jp.freebsd.org>
3 * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
4 * Copyright (c) 2000 BSDi
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 *	$FreeBSD: head/sys/dev/acpica/acpi_button.c 97274 2002-05-25 11:18:03Z bde $
29 */
30
31#include "opt_acpi.h"
32#include <sys/param.h>
33#include <sys/kernel.h>
34#include <sys/bus.h>
35
36#include "acpi.h"
37
38#include <dev/acpica/acpivar.h>
39
40/*
41 * Hooks for the ACPI CA debugging infrastructure
42 */
43#define _COMPONENT	ACPI_BUTTON
44ACPI_MODULE_NAME("BUTTON")
45
46struct acpi_button_softc {
47    device_t	button_dev;
48    ACPI_HANDLE	button_handle;
49#define ACPI_POWER_BUTTON	0
50#define ACPI_SLEEP_BUTTON	1
51    boolean_t	button_type;	/* Power or Sleep Button */
52};
53
54static int	acpi_button_probe(device_t dev);
55static int	acpi_button_attach(device_t dev);
56static void 	acpi_button_notify_handler(ACPI_HANDLE h,UINT32 notify, void *context);
57static void	acpi_button_notify_pressed_for_sleep(void *arg);
58static void	acpi_button_notify_pressed_for_wakeup(void *arg);
59
60static device_method_t acpi_button_methods[] = {
61    /* Device interface */
62    DEVMETHOD(device_probe,	acpi_button_probe),
63    DEVMETHOD(device_attach,	acpi_button_attach),
64
65    {0, 0}
66};
67
68static driver_t acpi_button_driver = {
69    "acpi_button",
70    acpi_button_methods,
71    sizeof(struct acpi_button_softc),
72};
73
74static devclass_t acpi_button_devclass;
75DRIVER_MODULE(acpi_button, acpi, acpi_button_driver, acpi_button_devclass, 0, 0);
76
77static int
78acpi_button_probe(device_t dev)
79{
80    struct acpi_button_softc	*sc;
81
82    sc = device_get_softc(dev);
83    if (acpi_get_type(dev) == ACPI_TYPE_DEVICE) {
84	if (!acpi_disabled("button")) {
85	    if (acpi_MatchHid(dev, "PNP0C0C")) {
86		device_set_desc(dev, "Power Button");
87		sc->button_type = ACPI_POWER_BUTTON;
88		return(0);
89	    }
90	    if (acpi_MatchHid(dev, "PNP0C0E")) {
91		device_set_desc(dev, "Sleep Button");
92		sc->button_type = ACPI_SLEEP_BUTTON;
93		return(0);
94	    }
95	}
96    }
97    return(ENXIO);
98}
99
100static int
101acpi_button_attach(device_t dev)
102{
103    struct acpi_button_softc	*sc;
104    ACPI_STATUS			status;
105
106    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
107
108    sc = device_get_softc(dev);
109    sc->button_dev = dev;
110    sc->button_handle = acpi_get_handle(dev);
111
112    if (ACPI_FAILURE(status = AcpiInstallNotifyHandler(sc->button_handle, ACPI_DEVICE_NOTIFY,
113					   acpi_button_notify_handler, sc))) {
114	device_printf(sc->button_dev, "couldn't install Notify handler - %s\n", AcpiFormatException(status));
115	return_VALUE(ENXIO);
116    }
117    return_VALUE(0);
118}
119
120static void
121acpi_button_notify_pressed_for_sleep(void *arg)
122{
123    struct acpi_button_softc	*sc;
124    struct acpi_softc		*acpi_sc;
125
126    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
127
128    sc = (struct acpi_button_softc *)arg;
129    acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
130    if (acpi_sc == NULL) {
131	return_VOID;
132    }
133
134    switch (sc->button_type) {
135    case ACPI_POWER_BUTTON:
136	ACPI_VPRINT(sc->button_dev, acpi_sc, "power button pressed\n");
137	acpi_eventhandler_power_button_for_sleep((void *)acpi_sc);
138	break;
139    case ACPI_SLEEP_BUTTON:
140	ACPI_VPRINT(sc->button_dev, acpi_sc, "sleep button pressed\n");
141	acpi_eventhandler_sleep_button_for_sleep((void *)acpi_sc);
142	break;
143    default:
144	break;		/* unknown button type */
145    }
146    return_VOID;
147}
148
149static void
150acpi_button_notify_pressed_for_wakeup(void *arg)
151{
152    struct acpi_button_softc	*sc;
153    struct acpi_softc		*acpi_sc;
154
155    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
156
157    sc = (struct acpi_button_softc *)arg;
158    acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
159    if (acpi_sc == NULL) {
160	return_VOID;
161    }
162
163    switch (sc->button_type) {
164    case ACPI_POWER_BUTTON:
165	ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by power button\n");
166	acpi_eventhandler_power_button_for_wakeup((void *)acpi_sc);
167	break;
168    case ACPI_SLEEP_BUTTON:
169	ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by sleep button\n");
170	acpi_eventhandler_sleep_button_for_wakeup((void *)acpi_sc);
171	break;
172    default:
173	break;		/* unknown button type */
174    }
175    return_VOID;
176}
177
178/* XXX maybe not here */
179#define ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP	0x80
180#define ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP	0x02
181
182static void
183acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
184{
185    struct acpi_button_softc	*sc = (struct acpi_button_softc *)context;
186
187    ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
188
189    switch (notify) {
190    case ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP:
191	AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_button_notify_pressed_for_sleep, sc);
192	break;
193    case ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP:
194	AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_button_notify_pressed_for_wakeup, sc);
195	break;
196    default:
197	break;		/* unknown notification value */
198    }
199    return_VOID;
200}
201
202
203