acpi_button.c revision 1.7 
1#define ACPI_BUT_DEBUG
2/*	$NetBSD: acpi_button.c,v 1.7 2003/04/17 01:22:21 thorpej Exp $	*/
3
4/*
5 * Copyright 2001, 2003 Wasabi Systems, Inc.
6 * All rights reserved.
7 *
8 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed for the NetBSD Project by
21 *	Wasabi Systems, Inc.
22 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
23 *    or promote products derived from this software without specific prior
24 *    written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39/*
40 * ACPI Button driver.
41 */
42
43#include <sys/cdefs.h>
44__KERNEL_RCSID(0, "$NetBSD: acpi_button.c,v 1.7 2003/04/17 01:22:21 thorpej Exp $");
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/device.h>
49
50#include <dev/acpi/acpica.h>
51#include <dev/acpi/acpireg.h>
52#include <dev/acpi/acpivar.h>
53
54#include <dev/sysmon/sysmonvar.h>
55
56struct acpibut_softc {
57	struct device sc_dev;		/* base device glue */
58	struct acpi_devnode *sc_node;	/* our ACPI devnode */
59	struct sysmon_pswitch sc_smpsw;	/* our sysmon glue */
60	int sc_flags;			/* see below */
61};
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_event(void *);
72void	acpibut_notify_handler(ACPI_HANDLE, UINT32, void *context);
73
74/*
75 * acpibut_match:
76 *
77 *	Autoconfiguration `match' routine.
78 */
79int
80acpibut_match(struct device *parent, struct cfdata *match, void *aux)
81{
82	struct acpi_attach_args *aa = aux;
83
84	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
85		return (0);
86
87	if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0C") == 0 ||
88	    strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0E") == 0)
89		return (1);
90
91	return (0);
92}
93
94/*
95 * acpibut_attach:
96 *
97 *	Autoconfiguration `attach' routine.
98 */
99void
100acpibut_attach(struct device *parent, struct device *self, void *aux)
101{
102	struct acpibut_softc *sc = (void *) self;
103	struct acpi_attach_args *aa = aux;
104	const char *desc;
105	ACPI_STATUS rv;
106
107	sc->sc_smpsw.smpsw_name = sc->sc_dev.dv_xname;
108
109	if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0C") == 0) {
110		sc->sc_smpsw.smpsw_type = SMPSW_TYPE_POWER;
111		desc = "Power";
112	} else if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0E") == 0) {
113		sc->sc_smpsw.smpsw_type = SMPSW_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	if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) {
125		printf("%s: unable to register with sysmon\n",
126		    sc->sc_dev.dv_xname);
127		return;
128	}
129
130	rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
131	    ACPI_DEVICE_NOTIFY, acpibut_notify_handler, sc);
132	if (rv != AE_OK) {
133		printf("%s: unable to register device notify handler: %d\n",
134		    sc->sc_dev.dv_xname, rv);
135		return;
136	}
137
138#ifdef ACPI_BUT_DEBUG
139	/* Display the current state when it changes. */
140	sc->sc_flags = ACPIBUT_F_VERBOSE;
141#endif
142}
143
144/*
145 * acpibut_pressed_event:
146 *
147 *	Deal with a button being pressed.
148 */
149void
150acpibut_pressed_event(void *arg)
151{
152	struct acpibut_softc *sc = arg;
153
154	if (sc->sc_flags & ACPIBUT_F_VERBOSE)
155		printf("%s: button pressed\n", sc->sc_dev.dv_xname);
156
157	sysmon_pswitch_event(&sc->sc_smpsw, SMPSW_EVENT_PRESSED);
158}
159
160/*
161 * acpibut_notify_handler:
162 *
163 *	Callback from ACPI interrupt handler to notify us of an event.
164 */
165void
166acpibut_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
167{
168	struct acpibut_softc *sc = context;
169	int rv;
170
171	switch (notify) {
172	case ACPI_NOTIFY_S0PowerButtonPressed:
173#if 0
174	case ACPI_NOTIFY_S0SleepButtonPressed: /* same as above */
175#endif
176#ifdef ACPI_BUT_DEBUG
177		printf("%s: received ButtonPressed message\n",
178		    sc->sc_dev.dv_xname);
179#endif
180		rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
181		    acpibut_pressed_event, sc);
182		if (rv != AE_OK)
183			printf("%s: WARNING: unable to queue button pressed "
184			    "callback: %d\n", sc->sc_dev.dv_xname, rv);
185		break;
186
187	/* XXX ACPI_NOTIFY_DeviceWake?? */
188
189	default:
190		printf("%s: received unknown notify message: 0x%x\n",
191		    sc->sc_dev.dv_xname, notify);
192	}
193}
194