acpi_button.c revision 1.2 
1/*	$NetBSD: acpi_button.c,v 1.2 2001/11/13 13:01:57 lukem 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 1.2 2001/11/13 13:01:57 lukem 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
53#define	ACPI_BUT_DEBUG
54
55struct acpibut_softc {
56	struct device sc_dev;		/* base device glue */
57	struct acpi_devnode *sc_node;	/* our ACPI devnode */
58	int sc_buttype;			/* button type */
59	int sc_flags;			/* see below */
60};
61
62#define	ACPIBUT_TYPE_POWER		0
63#define	ACPIBUT_TYPE_SLEEP		1
64
65#define	ACPIBUT_F_VERBOSE		0x01	/* verbose events */
66
67int	acpibut_match(struct device *, struct cfdata *, void *);
68void	acpibut_attach(struct device *, struct device *, void *);
69
70struct cfattach acpibut_ca = {
71	sizeof(struct acpibut_softc), acpibut_match, acpibut_attach,
72};
73
74void	acpibut_pressed_for_sleep(void *);
75void	acpibut_pressed_for_wakeup(void *);
76void	acpibut_notify_handler(ACPI_HANDLE, UINT32, void *context);
77
78/*
79 * acpibut_match:
80 *
81 *	Autoconfiguration `match' routine.
82 */
83int
84acpibut_match(struct device *parent, struct cfdata *match, void *aux)
85{
86	struct acpi_attach_args *aa = aux;
87
88	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
89		return (0);
90
91	if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0C") == 0 ||
92	    strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0E") == 0)
93		return (1);
94
95	return (0);
96}
97
98/*
99 * acpibut_attach:
100 *
101 *	Autoconfiguration `attach' routine.
102 */
103void
104acpibut_attach(struct device *parent, struct device *self, void *aux)
105{
106	struct acpibut_softc *sc = (void *) self;
107	struct acpi_attach_args *aa = aux;
108	const char *desc;
109	ACPI_STATUS rv;
110
111	if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0C") == 0) {
112		sc->sc_buttype = ACPIBUT_TYPE_POWER;
113		desc = "Power";
114	} else if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0E") == 0) {
115		sc->sc_buttype = ACPIBUT_TYPE_SLEEP;
116		desc = "Sleep";
117	} else {
118		printf("\n");
119		panic("acpibut_attach: impossible");
120	}
121
122	printf(": ACPI %s Button\n", desc);
123
124	sc->sc_node = aa->aa_node;
125
126	rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
127	    ACPI_DEVICE_NOTIFY, acpibut_notify_handler, sc);
128	if (rv != AE_OK) {
129		printf("%s: unable to register device notify handler: %d\n",
130		    sc->sc_dev.dv_xname, rv);
131		return;
132	}
133
134#ifdef ACPI_BUT_DEBUG
135	/* Display the current state when it changes. */
136	sc->sc_flags = ACPIBUT_F_VERBOSE;
137#endif
138}
139
140/*
141 * acpibut_pressed_for_sleep:
142 *
143 *	Deal with a button being pressed for sleep.
144 */
145void
146acpibut_pressed_for_sleep(void *arg)
147{
148	struct acpibut_softc *sc = arg;
149
150	if (sc->sc_flags & ACPIBUT_F_VERBOSE)
151		printf("%s: button pressed for sleep\n",
152		    sc->sc_dev.dv_xname);
153
154	/*
155	 * XXX Perform the appropriate action.
156	 */
157}
158
159/*
160 * acpibut_pressed_for_wakeup:
161 *
162 *	Deal with a button being pressed for wakeup.
163 */
164void
165acpibut_pressed_for_wakeup(void *arg)
166{
167	struct acpibut_softc *sc = arg;
168
169	if (sc->sc_flags & ACPIBUT_F_VERBOSE)
170		printf("%s: button pressed for wakeup\n",
171		    sc->sc_dev.dv_xname);
172
173	/*
174	 * XXX Perform the appropriate action.
175	 */
176}
177
178/*
179 * acpibut_notify_handler:
180 *
181 *	Callback from ACPI interrupt handler to notify us of an event.
182 */
183void
184acpibut_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
185{
186	struct acpibut_softc *sc = context;
187	int rv;
188
189	switch (notify) {
190	case ACPI_NOTIFY_S0PowerButtonPressed:
191#if 0
192	case ACPI_NOTIFY_S0SleepButtonPressed: /* same as above */
193#endif
194#ifdef ACPI_BUT_DEBUG
195		printf("%s: received ButtonPressed message\n",
196		    sc->sc_dev.dv_xname);
197#endif
198		rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
199		    acpibut_pressed_for_sleep, sc);
200		if (rv != AE_OK)
201			printf("%s: WARNING: unable to queue button pressed "
202			    "event: %d\n", sc->sc_dev.dv_xname, rv);
203		break;
204
205	/* XXX ACPI_NOTIFY_DeviceWake?? */
206
207	default:
208		printf("%s: received unknown notify message: 0x%x\n",
209		    sc->sc_dev.dv_xname, notify);
210	}
211}
212