acpi_button.c revision 1.5 
1/*	$NetBSD: acpi_button.c,v 1.5 2002/09/30 20:41:17 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 1.5 2002/09/30 20:41:17 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
68CFATTACH_DECL(acpibut, sizeof(struct acpibut_softc),
69    acpibut_match, acpibut_attach, NULL, NULL)
70
71void	acpibut_pressed_for_sleep(void *);
72void	acpibut_pressed_for_wakeup(void *);
73void	acpibut_notify_handler(ACPI_HANDLE, UINT32, void *context);
74
75/*
76 * acpibut_match:
77 *
78 *	Autoconfiguration `match' routine.
79 */
80int
81acpibut_match(struct device *parent, struct cfdata *match, void *aux)
82{
83	struct acpi_attach_args *aa = aux;
84
85	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
86		return (0);
87
88	if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0C") == 0 ||
89	    strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0E") == 0)
90		return (1);
91
92	return (0);
93}
94
95/*
96 * acpibut_attach:
97 *
98 *	Autoconfiguration `attach' routine.
99 */
100void
101acpibut_attach(struct device *parent, struct device *self, void *aux)
102{
103	struct acpibut_softc *sc = (void *) self;
104	struct acpi_attach_args *aa = aux;
105	const char *desc;
106	ACPI_STATUS rv;
107
108	if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0C") == 0) {
109		sc->sc_buttype = ACPIBUT_TYPE_POWER;
110		desc = "Power";
111	} else if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0E") == 0) {
112		sc->sc_buttype = ACPIBUT_TYPE_SLEEP;
113		desc = "Sleep";
114	} else {
115		printf("\n");
116		panic("acpibut_attach: impossible");
117	}
118
119	printf(": ACPI %s Button\n", desc);
120
121	sc->sc_node = aa->aa_node;
122
123	rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
124	    ACPI_DEVICE_NOTIFY, acpibut_notify_handler, sc);
125	if (rv != AE_OK) {
126		printf("%s: unable to register device notify handler: %d\n",
127		    sc->sc_dev.dv_xname, rv);
128		return;
129	}
130
131#ifdef ACPI_BUT_DEBUG
132	/* Display the current state when it changes. */
133	sc->sc_flags = ACPIBUT_F_VERBOSE;
134#endif
135}
136
137/*
138 * acpibut_pressed_for_sleep:
139 *
140 *	Deal with a button being pressed for sleep.
141 */
142void
143acpibut_pressed_for_sleep(void *arg)
144{
145	struct acpibut_softc *sc = arg;
146
147	if (sc->sc_flags & ACPIBUT_F_VERBOSE)
148		printf("%s: button pressed for sleep\n",
149		    sc->sc_dev.dv_xname);
150
151	/*
152	 * XXX Perform the appropriate action.
153	 */
154}
155
156/*
157 * acpibut_pressed_for_wakeup:
158 *
159 *	Deal with a button being pressed for wakeup.
160 */
161void
162acpibut_pressed_for_wakeup(void *arg)
163{
164	struct acpibut_softc *sc = arg;
165
166	if (sc->sc_flags & ACPIBUT_F_VERBOSE)
167		printf("%s: button pressed for wakeup\n",
168		    sc->sc_dev.dv_xname);
169
170	/*
171	 * XXX Perform the appropriate action.
172	 */
173}
174
175/*
176 * acpibut_notify_handler:
177 *
178 *	Callback from ACPI interrupt handler to notify us of an event.
179 */
180void
181acpibut_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
182{
183	struct acpibut_softc *sc = context;
184	int rv;
185
186	switch (notify) {
187	case ACPI_NOTIFY_S0PowerButtonPressed:
188#if 0
189	case ACPI_NOTIFY_S0SleepButtonPressed: /* same as above */
190#endif
191#ifdef ACPI_BUT_DEBUG
192		printf("%s: received ButtonPressed message\n",
193		    sc->sc_dev.dv_xname);
194#endif
195		rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
196		    acpibut_pressed_for_sleep, sc);
197		if (rv != AE_OK)
198			printf("%s: WARNING: unable to queue button pressed "
199			    "event: %d\n", sc->sc_dev.dv_xname, rv);
200		break;
201
202	/* XXX ACPI_NOTIFY_DeviceWake?? */
203
204	default:
205		printf("%s: received unknown notify message: 0x%x\n",
206		    sc->sc_dev.dv_xname, notify);
207	}
208}
209