acpi_button.c revision 1.4 
1/*	$NetBSD: acpi_button.c,v 1.4 2002/09/27 20:37:33 thorpej Exp $	*/
2
3/*
4 * Copyright 2001 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed for the NetBSD Project by
20 *	Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 *    or promote products derived from this software without specific prior
23 *    written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38/*
39 * ACPI Button driver.
40 */
41
42#include <sys/cdefs.h>
43__KERNEL_RCSID(0, "$NetBSD: acpi_button.c,v 1.4 2002/09/27 20:37:33 thorpej Exp $");
44
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/device.h>
48
49#include <dev/acpi/acpica.h>
50#include <dev/acpi/acpireg.h>
51#include <dev/acpi/acpivar.h>
52
53struct acpibut_softc {
54	struct device sc_dev;		/* base device glue */
55	struct acpi_devnode *sc_node;	/* our ACPI devnode */
56	int sc_buttype;			/* button type */
57	int sc_flags;			/* see below */
58};
59
60#define	ACPIBUT_TYPE_POWER		0
61#define	ACPIBUT_TYPE_SLEEP		1
62
63#define	ACPIBUT_F_VERBOSE		0x01	/* verbose events */
64
65int	acpibut_match(struct device *, struct cfdata *, void *);
66void	acpibut_attach(struct device *, struct device *, void *);
67
68const struct cfattach acpibut_ca = {
69	sizeof(struct acpibut_softc), acpibut_match, acpibut_attach,
70};
71
72void	acpibut_pressed_for_sleep(void *);
73void	acpibut_pressed_for_wakeup(void *);
74void	acpibut_notify_handler(ACPI_HANDLE, UINT32, void *context);
75
76/*
77 * acpibut_match:
78 *
79 *	Autoconfiguration `match' routine.
80 */
81int
82acpibut_match(struct device *parent, struct cfdata *match, void *aux)
83{
84	struct acpi_attach_args *aa = aux;
85
86	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
87		return (0);
88
89	if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0C") == 0 ||
90	    strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0E") == 0)
91		return (1);
92
93	return (0);
94}
95
96/*
97 * acpibut_attach:
98 *
99 *	Autoconfiguration `attach' routine.
100 */
101void
102acpibut_attach(struct device *parent, struct device *self, void *aux)
103{
104	struct acpibut_softc *sc = (void *) self;
105	struct acpi_attach_args *aa = aux;
106	const char *desc;
107	ACPI_STATUS rv;
108
109	if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0C") == 0) {
110		sc->sc_buttype = ACPIBUT_TYPE_POWER;
111		desc = "Power";
112	} else if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0E") == 0) {
113		sc->sc_buttype = ACPIBUT_TYPE_SLEEP;
114		desc = "Sleep";
115	} else {
116		printf("\n");
117		panic("acpibut_attach: impossible");
118	}
119
120	printf(": ACPI %s Button\n", desc);
121
122	sc->sc_node = aa->aa_node;
123
124	rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
125	    ACPI_DEVICE_NOTIFY, acpibut_notify_handler, sc);
126	if (rv != AE_OK) {
127		printf("%s: unable to register device notify handler: %d\n",
128		    sc->sc_dev.dv_xname, rv);
129		return;
130	}
131
132#ifdef ACPI_BUT_DEBUG
133	/* Display the current state when it changes. */
134	sc->sc_flags = ACPIBUT_F_VERBOSE;
135#endif
136}
137
138/*
139 * acpibut_pressed_for_sleep:
140 *
141 *	Deal with a button being pressed for sleep.
142 */
143void
144acpibut_pressed_for_sleep(void *arg)
145{
146	struct acpibut_softc *sc = arg;
147
148	if (sc->sc_flags & ACPIBUT_F_VERBOSE)
149		printf("%s: button pressed for sleep\n",
150		    sc->sc_dev.dv_xname);
151
152	/*
153	 * XXX Perform the appropriate action.
154	 */
155}
156
157/*
158 * acpibut_pressed_for_wakeup:
159 *
160 *	Deal with a button being pressed for wakeup.
161 */
162void
163acpibut_pressed_for_wakeup(void *arg)
164{
165	struct acpibut_softc *sc = arg;
166
167	if (sc->sc_flags & ACPIBUT_F_VERBOSE)
168		printf("%s: button pressed for wakeup\n",
169		    sc->sc_dev.dv_xname);
170
171	/*
172	 * XXX Perform the appropriate action.
173	 */
174}
175
176/*
177 * acpibut_notify_handler:
178 *
179 *	Callback from ACPI interrupt handler to notify us of an event.
180 */
181void
182acpibut_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
183{
184	struct acpibut_softc *sc = context;
185	int rv;
186
187	switch (notify) {
188	case ACPI_NOTIFY_S0PowerButtonPressed:
189#if 0
190	case ACPI_NOTIFY_S0SleepButtonPressed: /* same as above */
191#endif
192#ifdef ACPI_BUT_DEBUG
193		printf("%s: received ButtonPressed message\n",
194		    sc->sc_dev.dv_xname);
195#endif
196		rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
197		    acpibut_pressed_for_sleep, sc);
198		if (rv != AE_OK)
199			printf("%s: WARNING: unable to queue button pressed "
200			    "event: %d\n", sc->sc_dev.dv_xname, rv);
201		break;
202
203	/* XXX ACPI_NOTIFY_DeviceWake?? */
204
205	default:
206		printf("%s: received unknown notify message: 0x%x\n",
207		    sc->sc_dev.dv_xname, notify);
208	}
209}
210