acpi_button.c revision 118783 
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 118783 2003-08-11 15:34:43Z njl $
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#include <dev/acpica/acpivar.h>
38
39/* Hooks for the ACPI CA debugging infrastructure */
40#define _COMPONENT	ACPI_BUTTON
41ACPI_MODULE_NAME("BUTTON")
42
43struct acpi_button_softc {
44    device_t	button_dev;
45    ACPI_HANDLE	button_handle;
46    boolean_t	button_type;	/* Power or Sleep Button */
47#define		ACPI_POWER_BUTTON	0
48#define		ACPI_SLEEP_BUTTON	1
49};
50
51#define		ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP	0x80
52#define		ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP	0x02
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,
59					   void *context);
60static void	acpi_button_notify_pressed_for_sleep(void *arg);
61static void	acpi_button_notify_pressed_for_wakeup(void *arg);
62
63static device_method_t acpi_button_methods[] = {
64    /* Device interface */
65    DEVMETHOD(device_probe,	acpi_button_probe),
66    DEVMETHOD(device_attach,	acpi_button_attach),
67    DEVMETHOD(device_suspend,	acpi_button_suspend),
68    DEVMETHOD(device_shutdown,	acpi_button_suspend),
69    DEVMETHOD(device_resume,	acpi_button_resume),
70
71    {0, 0}
72};
73
74static driver_t acpi_button_driver = {
75    "acpi_button",
76    acpi_button_methods,
77    sizeof(struct acpi_button_softc),
78};
79
80static devclass_t acpi_button_devclass;
81DRIVER_MODULE(acpi_button, acpi, acpi_button_driver, acpi_button_devclass,
82	      0, 0);
83
84static int
85acpi_button_probe(device_t dev)
86{
87    struct acpi_button_softc	*sc;
88
89    sc = device_get_softc(dev);
90    if (acpi_get_type(dev) == ACPI_TYPE_DEVICE) {
91	if (!acpi_disabled("button")) {
92	    if (acpi_MatchHid(dev, "PNP0C0C")) {
93		device_set_desc(dev, "Power Button");
94		sc->button_type = ACPI_POWER_BUTTON;
95		return (0);
96	    }
97	    if (acpi_MatchHid(dev, "PNP0C0E")) {
98		device_set_desc(dev, "Sleep Button");
99		sc->button_type = ACPI_SLEEP_BUTTON;
100		return (0);
101	    }
102	}
103    }
104    return (ENXIO);
105}
106
107static int
108acpi_button_attach(device_t dev)
109{
110    struct acpi_button_softc	*sc;
111    ACPI_STATUS			status;
112
113    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
114
115    sc = device_get_softc(dev);
116    sc->button_dev = dev;
117    sc->button_handle = acpi_get_handle(dev);
118
119    status = AcpiInstallNotifyHandler(sc->button_handle, ACPI_DEVICE_NOTIFY,
120				      acpi_button_notify_handler, sc);
121    if (ACPI_FAILURE(status)) {
122	device_printf(sc->button_dev, "couldn't install Notify handler - %s\n",
123		      AcpiFormatException(status));
124	return_VALUE (ENXIO);
125    }
126    acpi_device_enable_wake_capability(sc->button_handle, 1);
127    return_VALUE (0);
128}
129
130static int
131acpi_button_suspend(device_t dev)
132{
133    struct acpi_button_softc	*sc;
134
135    sc = device_get_softc(dev);
136    acpi_device_enable_wake_event(sc->button_handle);
137    return (0);
138}
139
140static int
141acpi_button_resume(device_t dev)
142{
143    return (0);
144}
145
146static void
147acpi_button_notify_pressed_for_sleep(void *arg)
148{
149    struct acpi_button_softc	*sc;
150    struct acpi_softc		*acpi_sc;
151
152    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
153
154    sc = (struct acpi_button_softc *)arg;
155    acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
156    if (acpi_sc == NULL)
157	return_VOID;
158
159    switch (sc->button_type) {
160    case ACPI_POWER_BUTTON:
161	ACPI_VPRINT(sc->button_dev, acpi_sc, "power button pressed\n");
162	acpi_eventhandler_power_button_for_sleep((void *)acpi_sc);
163	break;
164    case ACPI_SLEEP_BUTTON:
165	ACPI_VPRINT(sc->button_dev, acpi_sc, "sleep button pressed\n");
166	acpi_eventhandler_sleep_button_for_sleep((void *)acpi_sc);
167	break;
168    default:
169	break;		/* unknown button type */
170    }
171}
172
173static void
174acpi_button_notify_pressed_for_wakeup(void *arg)
175{
176    struct acpi_button_softc	*sc;
177    struct acpi_softc		*acpi_sc;
178
179    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
180
181    sc = (struct acpi_button_softc *)arg;
182    acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
183    if (acpi_sc == NULL)
184	return_VOID;
185
186    switch (sc->button_type) {
187    case ACPI_POWER_BUTTON:
188	ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by power button\n");
189	acpi_eventhandler_power_button_for_wakeup((void *)acpi_sc);
190	break;
191    case ACPI_SLEEP_BUTTON:
192	ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by sleep button\n");
193	acpi_eventhandler_sleep_button_for_wakeup((void *)acpi_sc);
194	break;
195    default:
196	break;		/* unknown button type */
197    }
198}
199
200static void
201acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
202{
203    struct acpi_button_softc	*sc = (struct acpi_button_softc *)context;
204
205    ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
206
207    switch (notify) {
208    case ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP:
209	AcpiOsQueueForExecution(OSD_PRIORITY_LO,
210				acpi_button_notify_pressed_for_sleep, sc);
211	break;
212    case ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP:
213	AcpiOsQueueForExecution(OSD_PRIORITY_LO,
214				acpi_button_notify_pressed_for_wakeup, sc);
215	break;
216    default:
217	break;		/* unknown notification value */
218    }
219}
220