acpi_lid.c revision 1.19 
1/*	$NetBSD: acpi_lid.c,v 1.19 2006/02/20 12:17:49 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 Lid Switch driver.
40 */
41
42#include <sys/cdefs.h>
43__KERNEL_RCSID(0, "$NetBSD: acpi_lid.c,v 1.19 2006/02/20 12:17:49 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 acpilid_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};
60
61static const char * const lid_hid[] = {
62	"PNP0C0D",
63	NULL
64};
65
66static int	acpilid_match(struct device *, struct cfdata *, void *);
67static void	acpilid_attach(struct device *, struct device *, void *);
68
69CFATTACH_DECL(acpilid, sizeof(struct acpilid_softc),
70    acpilid_match, acpilid_attach, NULL, NULL);
71
72static void	acpilid_status_changed(void *);
73static void	acpilid_notify_handler(ACPI_HANDLE, UINT32, void *);
74
75/*
76 * acpilid_match:
77 *
78 *	Autoconfiguration `match' routine.
79 */
80static int
81acpilid_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	return acpi_match_hid(aa->aa_node->ad_devinfo, lid_hid);
89}
90
91/*
92 * acpilid_attach:
93 *
94 *	Autoconfiguration `attach' routine.
95 */
96static void
97acpilid_attach(struct device *parent, struct device *self, void *aux)
98{
99	struct acpilid_softc *sc = (void *) self;
100	struct acpi_attach_args *aa = aux;
101	ACPI_STATUS rv;
102
103	aprint_naive(": ACPI Lid Switch\n");
104	aprint_normal(": ACPI Lid Switch\n");
105
106	sc->sc_node = aa->aa_node;
107
108	sc->sc_smpsw.smpsw_name = sc->sc_dev.dv_xname;
109	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_LID;
110	if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) {
111		aprint_error("%s: unable to register with sysmon\n",
112		    sc->sc_dev.dv_xname);
113		return;
114	}
115
116	rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
117	    ACPI_DEVICE_NOTIFY, acpilid_notify_handler, sc);
118	if (ACPI_FAILURE(rv)) {
119		aprint_error("%s: unable to register DEVICE NOTIFY handler: %s\n",
120		    sc->sc_dev.dv_xname, AcpiFormatException(rv));
121		return;
122	}
123
124	acpi_set_wake_gpe(sc->sc_node->ad_handle);
125}
126
127/*
128 * acpilid_status_changed:
129 *
130 *	Get, and possibly display, the lid status, and take action.
131 */
132static void
133acpilid_status_changed(void *arg)
134{
135	struct acpilid_softc *sc = arg;
136	ACPI_INTEGER status;
137	ACPI_STATUS rv;
138
139	rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &status);
140	if (ACPI_FAILURE(rv))
141		return;
142
143	sysmon_pswitch_event(&sc->sc_smpsw, status == 0 ?
144	    PSWITCH_EVENT_PRESSED : PSWITCH_EVENT_RELEASED);
145}
146
147/*
148 * acpilid_notify_handler:
149 *
150 *	Callback from ACPI interrupt handler to notify us of an event.
151 */
152static void
153acpilid_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
154{
155	struct acpilid_softc *sc = context;
156	int rv;
157
158	switch (notify) {
159	case ACPI_NOTIFY_LidStatusChanged:
160#ifdef ACPI_LID_DEBUG
161		printf("%s: received LidStatusChanged message\n",
162		    sc->sc_dev.dv_xname);
163#endif
164		rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
165		    acpilid_status_changed, sc);
166		if (ACPI_FAILURE(rv))
167			printf("%s: WARNING: unable to queue lid change "
168			    "callback: %s\n", sc->sc_dev.dv_xname,
169			    AcpiFormatException(rv));
170		break;
171
172	default:
173		printf("%s: received unknown notify message: 0x%x\n",
174		    sc->sc_dev.dv_xname, notify);
175	}
176}
177