acpi_button.c revision 1.14 
1/*	$NetBSD: acpi_button.c,v 1.14 2004/04/11 06:48:25 kochi 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 1.14 2004/04/11 06:48:25 kochi 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 button_hid[] = {
63	"PNP0C0C",
64	"PNP0C0E",
65	NULL
66};
67
68#define	ACPIBUT_F_VERBOSE		0x01	/* verbose events */
69
70int	acpibut_match(struct device *, struct cfdata *, void *);
71void	acpibut_attach(struct device *, struct device *, void *);
72
73CFATTACH_DECL(acpibut, sizeof(struct acpibut_softc),
74    acpibut_match, acpibut_attach, NULL, NULL);
75
76void	acpibut_pressed_event(void *);
77void	acpibut_notify_handler(ACPI_HANDLE, UINT32, void *context);
78
79/*
80 * acpibut_match:
81 *
82 *	Autoconfiguration `match' routine.
83 */
84int
85acpibut_match(struct device *parent, struct cfdata *match, void *aux)
86{
87	struct acpi_attach_args *aa = aux;
88
89	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
90		return 0;
91
92	return acpi_match_hid(aa->aa_node->ad_devinfo, button_hid);
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	sc->sc_smpsw.smpsw_name = sc->sc_dev.dv_xname;
109
110	if (strcmp(aa->aa_node->ad_devinfo->HardwareId.Value, "PNP0C0C") == 0) {
111		sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_POWER;
112		desc = "Power";
113	} else if (strcmp(aa->aa_node->ad_devinfo->HardwareId.Value, "PNP0C0E") == 0) {
114		sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_SLEEP;
115		desc = "Sleep";
116	} else {
117		printf("\n");
118		panic("acpibut_attach: impossible");
119	}
120
121	printf(": ACPI %s Button\n", desc);
122
123	sc->sc_node = aa->aa_node;
124
125	if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) {
126		printf("%s: unable to register with sysmon\n",
127		    sc->sc_dev.dv_xname);
128		return;
129	}
130
131	rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
132	    ACPI_DEVICE_NOTIFY, acpibut_notify_handler, sc);
133	if (ACPI_FAILURE(rv)) {
134		printf("%s: unable to register DEVICE NOTIFY handler: %s\n",
135		    sc->sc_dev.dv_xname, AcpiFormatException(rv));
136		return;
137	}
138
139#ifdef ACPI_BUT_DEBUG
140	/* Display the current state when it changes. */
141	sc->sc_flags = ACPIBUT_F_VERBOSE;
142#endif
143}
144
145/*
146 * acpibut_pressed_event:
147 *
148 *	Deal with a button being pressed.
149 */
150void
151acpibut_pressed_event(void *arg)
152{
153	struct acpibut_softc *sc = arg;
154
155	if (sc->sc_flags & ACPIBUT_F_VERBOSE)
156		printf("%s: button pressed\n", sc->sc_dev.dv_xname);
157
158	sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
159}
160
161/*
162 * acpibut_notify_handler:
163 *
164 *	Callback from ACPI interrupt handler to notify us of an event.
165 */
166void
167acpibut_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
168{
169	struct acpibut_softc *sc = context;
170	int rv;
171
172	switch (notify) {
173	case ACPI_NOTIFY_S0PowerButtonPressed:
174#if 0
175	case ACPI_NOTIFY_S0SleepButtonPressed: /* same as above */
176#endif
177#ifdef ACPI_BUT_DEBUG
178		printf("%s: received ButtonPressed message\n",
179		    sc->sc_dev.dv_xname);
180#endif
181		rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
182		    acpibut_pressed_event, sc);
183		if (ACPI_FAILURE(rv))
184			printf("%s: WARNING: unable to queue button pressed "
185			    "callback: %s\n", sc->sc_dev.dv_xname,
186			    AcpiFormatException(rv));
187		break;
188
189	/* XXX ACPI_NOTIFY_DeviceWake?? */
190
191	default:
192		printf("%s: received unknown notify message: 0x%x\n",
193		    sc->sc_dev.dv_xname, notify);
194	}
195}
196