acpi_button.c revision 1.21 
1/*	$NetBSD: acpi_button.c,v 1.21 2006/10/12 01:30:54 christos Exp $	*/
2
3/*
4 * Copyright 2001, 2003 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 1.21 2006/10/12 01:30:54 christos 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#include <dev/sysmon/sysmonvar.h>
54
55struct acpibut_softc {
56	struct device sc_dev;		/* base device glue */
57	struct acpi_devnode *sc_node;	/* our ACPI devnode */
58	struct sysmon_pswitch sc_smpsw;	/* our sysmon glue */
59	int sc_flags;			/* see below */
60};
61
62static const char * const power_button_hid[] = {
63	"PNP0C0C",
64	NULL
65};
66
67static const char * const sleep_button_hid[] = {
68	"PNP0C0E",
69	NULL
70};
71
72#define	ACPIBUT_F_VERBOSE		0x01	/* verbose events */
73
74static int	acpibut_match(struct device *, struct cfdata *, void *);
75static void	acpibut_attach(struct device *, struct device *, void *);
76
77CFATTACH_DECL(acpibut, sizeof(struct acpibut_softc),
78    acpibut_match, acpibut_attach, NULL, NULL);
79
80static void	acpibut_pressed_event(void *);
81static void	acpibut_notify_handler(ACPI_HANDLE, UINT32, void *);
82
83/*
84 * acpibut_match:
85 *
86 *	Autoconfiguration `match' routine.
87 */
88static int
89acpibut_match(struct device *parent __unused, struct cfdata *match __unused,
90    void *aux)
91{
92	struct acpi_attach_args *aa = aux;
93
94	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
95		return 0;
96
97	if (acpi_match_hid(aa->aa_node->ad_devinfo, power_button_hid))
98		return 1;
99
100	if (acpi_match_hid(aa->aa_node->ad_devinfo, sleep_button_hid))
101		return 1;
102
103	return 0;
104}
105
106/*
107 * acpibut_attach:
108 *
109 *	Autoconfiguration `attach' routine.
110 */
111static void
112acpibut_attach(struct device *parent __unused, struct device *self, void *aux)
113{
114	struct acpibut_softc *sc = (void *) self;
115	struct acpi_attach_args *aa = aux;
116	const char *desc;
117	ACPI_STATUS rv;
118
119	sc->sc_smpsw.smpsw_name = sc->sc_dev.dv_xname;
120
121	if (acpi_match_hid(aa->aa_node->ad_devinfo, power_button_hid)) {
122		sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_POWER;
123		desc = "Power";
124	} else if (acpi_match_hid(aa->aa_node->ad_devinfo, sleep_button_hid)) {
125		sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_SLEEP;
126		desc = "Sleep";
127	} else {
128		printf("\n");
129		panic("acpibut_attach: impossible");
130	}
131
132	aprint_naive(": ACPI %s Button\n", desc);
133	aprint_normal(": ACPI %s Button\n", desc);
134
135	sc->sc_node = aa->aa_node;
136
137	if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) {
138		aprint_error("%s: unable to register with sysmon\n",
139		    sc->sc_dev.dv_xname);
140		return;
141	}
142
143	rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
144	    ACPI_DEVICE_NOTIFY, acpibut_notify_handler, sc);
145	if (ACPI_FAILURE(rv)) {
146		aprint_error("%s: unable to register DEVICE NOTIFY handler: %s\n",
147		    sc->sc_dev.dv_xname, AcpiFormatException(rv));
148		return;
149	}
150
151	acpi_set_wake_gpe(sc->sc_node->ad_handle);
152
153#ifdef ACPI_BUT_DEBUG
154	/* Display the current state when it changes. */
155	sc->sc_flags = ACPIBUT_F_VERBOSE;
156#endif
157}
158
159/*
160 * acpibut_pressed_event:
161 *
162 *	Deal with a button being pressed.
163 */
164static void
165acpibut_pressed_event(void *arg)
166{
167	struct acpibut_softc *sc = arg;
168
169	if (sc->sc_flags & ACPIBUT_F_VERBOSE)
170		printf("%s: button pressed\n", sc->sc_dev.dv_xname);
171
172	sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
173}
174
175/*
176 * acpibut_notify_handler:
177 *
178 *	Callback from ACPI interrupt handler to notify us of an event.
179 */
180static void
181acpibut_notify_handler(ACPI_HANDLE handle __unused, UINT32 notify,
182    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_event, sc);
198		if (ACPI_FAILURE(rv))
199			printf("%s: WARNING: unable to queue button pressed "
200			    "callback: %s\n", sc->sc_dev.dv_xname,
201			    AcpiFormatException(rv));
202		break;
203
204	/* XXX ACPI_NOTIFY_DeviceWake?? */
205
206	default:
207		printf("%s: received unknown notify message: 0x%x\n",
208		    sc->sc_dev.dv_xname, notify);
209	}
210}
211