acpi_button.c revision 100497 
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 100497 2002-07-22 12:52:54Z iwasaki $
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 int	acpi_button_suspend(device_t dev);
57static int	acpi_button_resume(device_t dev);
58static void 	acpi_button_notify_handler(ACPI_HANDLE h,UINT32 notify, void *context);
59static void	acpi_button_notify_pressed_for_sleep(void *arg);
60static void	acpi_button_notify_pressed_for_wakeup(void *arg);
61
62static device_method_t acpi_button_methods[] = {
63    /* Device interface */
64    DEVMETHOD(device_probe,	acpi_button_probe),
65    DEVMETHOD(device_attach,	acpi_button_attach),
66    DEVMETHOD(device_suspend,	acpi_button_suspend),
67    DEVMETHOD(device_resume,	acpi_button_resume),
68
69    {0, 0}
70};
71
72static driver_t acpi_button_driver = {
73    "acpi_button",
74    acpi_button_methods,
75    sizeof(struct acpi_button_softc),
76};
77
78static devclass_t acpi_button_devclass;
79DRIVER_MODULE(acpi_button, acpi, acpi_button_driver, acpi_button_devclass, 0, 0);
80
81static int
82acpi_button_probe(device_t dev)
83{
84    struct acpi_button_softc	*sc;
85
86    sc = device_get_softc(dev);
87    if (acpi_get_type(dev) == ACPI_TYPE_DEVICE) {
88	if (!acpi_disabled("button")) {
89	    if (acpi_MatchHid(dev, "PNP0C0C")) {
90		device_set_desc(dev, "Power Button");
91		sc->button_type = ACPI_POWER_BUTTON;
92		return(0);
93	    }
94	    if (acpi_MatchHid(dev, "PNP0C0E")) {
95		device_set_desc(dev, "Sleep Button");
96		sc->button_type = ACPI_SLEEP_BUTTON;
97		return(0);
98	    }
99	}
100    }
101    return(ENXIO);
102}
103
104static int
105acpi_button_attach(device_t dev)
106{
107    struct acpi_button_softc	*sc;
108    ACPI_STATUS			status;
109
110    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
111
112    sc = device_get_softc(dev);
113    sc->button_dev = dev;
114    sc->button_handle = acpi_get_handle(dev);
115
116    if (ACPI_FAILURE(status = AcpiInstallNotifyHandler(sc->button_handle, ACPI_DEVICE_NOTIFY,
117					   acpi_button_notify_handler, sc))) {
118	device_printf(sc->button_dev, "couldn't install Notify handler - %s\n", AcpiFormatException(status));
119	return_VALUE(ENXIO);
120    }
121    acpi_device_enable_wake_capability(sc->button_handle, 1);
122    return_VALUE(0);
123}
124
125static int
126acpi_button_suspend(device_t dev)
127{
128    struct acpi_button_softc	*sc;
129
130    sc = device_get_softc(dev);
131    acpi_device_enable_wake_event(sc->button_handle);
132    return (0);
133}
134
135static int
136acpi_button_resume(device_t dev)
137{
138
139    return (0);
140}
141
142static void
143acpi_button_notify_pressed_for_sleep(void *arg)
144{
145    struct acpi_button_softc	*sc;
146    struct acpi_softc		*acpi_sc;
147
148    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
149
150    sc = (struct acpi_button_softc *)arg;
151    acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
152    if (acpi_sc == NULL) {
153	return_VOID;
154    }
155
156    switch (sc->button_type) {
157    case ACPI_POWER_BUTTON:
158	ACPI_VPRINT(sc->button_dev, acpi_sc, "power button pressed\n");
159	acpi_eventhandler_power_button_for_sleep((void *)acpi_sc);
160	break;
161    case ACPI_SLEEP_BUTTON:
162	ACPI_VPRINT(sc->button_dev, acpi_sc, "sleep button pressed\n");
163	acpi_eventhandler_sleep_button_for_sleep((void *)acpi_sc);
164	break;
165    default:
166	break;		/* unknown button type */
167    }
168    return_VOID;
169}
170
171static void
172acpi_button_notify_pressed_for_wakeup(void *arg)
173{
174    struct acpi_button_softc	*sc;
175    struct acpi_softc		*acpi_sc;
176
177    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
178
179    sc = (struct acpi_button_softc *)arg;
180    acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
181    if (acpi_sc == NULL) {
182	return_VOID;
183    }
184
185    switch (sc->button_type) {
186    case ACPI_POWER_BUTTON:
187	ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by power button\n");
188	acpi_eventhandler_power_button_for_wakeup((void *)acpi_sc);
189	break;
190    case ACPI_SLEEP_BUTTON:
191	ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by sleep button\n");
192	acpi_eventhandler_sleep_button_for_wakeup((void *)acpi_sc);
193	break;
194    default:
195	break;		/* unknown button type */
196    }
197    return_VOID;
198}
199
200/* XXX maybe not here */
201#define ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP	0x80
202#define ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP	0x02
203
204static void
205acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
206{
207    struct acpi_button_softc	*sc = (struct acpi_button_softc *)context;
208
209    ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
210
211    switch (notify) {
212    case ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP:
213	AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_button_notify_pressed_for_sleep, sc);
214	break;
215    case ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP:
216	AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_button_notify_pressed_for_wakeup, sc);
217	break;
218    default:
219	break;		/* unknown notification value */
220    }
221    return_VOID;
222}
223
224
225