acpi_lid.c revision 1.20 
1/*	$NetBSD: acpi_lid.c,v 1.20 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 Lid Switch driver.
40 */
41
42#include <sys/cdefs.h>
43__KERNEL_RCSID(0, "$NetBSD: acpi_lid.c,v 1.20 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 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 __unused, struct cfdata *match __unused,
82    void *aux)
83{
84	struct acpi_attach_args *aa = aux;
85
86	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
87		return 0;
88
89	return acpi_match_hid(aa->aa_node->ad_devinfo, lid_hid);
90}
91
92/*
93 * acpilid_attach:
94 *
95 *	Autoconfiguration `attach' routine.
96 */
97static void
98acpilid_attach(struct device *parent __unused, struct device *self, void *aux)
99{
100	struct acpilid_softc *sc = (void *) self;
101	struct acpi_attach_args *aa = aux;
102	ACPI_STATUS rv;
103
104	aprint_naive(": ACPI Lid Switch\n");
105	aprint_normal(": ACPI Lid Switch\n");
106
107	sc->sc_node = aa->aa_node;
108
109	sc->sc_smpsw.smpsw_name = sc->sc_dev.dv_xname;
110	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_LID;
111	if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) {
112		aprint_error("%s: unable to register with sysmon\n",
113		    sc->sc_dev.dv_xname);
114		return;
115	}
116
117	rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
118	    ACPI_DEVICE_NOTIFY, acpilid_notify_handler, sc);
119	if (ACPI_FAILURE(rv)) {
120		aprint_error("%s: unable to register DEVICE NOTIFY handler: %s\n",
121		    sc->sc_dev.dv_xname, AcpiFormatException(rv));
122		return;
123	}
124
125	acpi_set_wake_gpe(sc->sc_node->ad_handle);
126}
127
128/*
129 * acpilid_status_changed:
130 *
131 *	Get, and possibly display, the lid status, and take action.
132 */
133static void
134acpilid_status_changed(void *arg)
135{
136	struct acpilid_softc *sc = arg;
137	ACPI_INTEGER status;
138	ACPI_STATUS rv;
139
140	rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &status);
141	if (ACPI_FAILURE(rv))
142		return;
143
144	sysmon_pswitch_event(&sc->sc_smpsw, status == 0 ?
145	    PSWITCH_EVENT_PRESSED : PSWITCH_EVENT_RELEASED);
146}
147
148/*
149 * acpilid_notify_handler:
150 *
151 *	Callback from ACPI interrupt handler to notify us of an event.
152 */
153static void
154acpilid_notify_handler(ACPI_HANDLE handle __unused, UINT32 notify,
155    void *context)
156{
157	struct acpilid_softc *sc = context;
158	int rv;
159
160	switch (notify) {
161	case ACPI_NOTIFY_LidStatusChanged:
162#ifdef ACPI_LID_DEBUG
163		printf("%s: received LidStatusChanged message\n",
164		    sc->sc_dev.dv_xname);
165#endif
166		rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
167		    acpilid_status_changed, sc);
168		if (ACPI_FAILURE(rv))
169			printf("%s: WARNING: unable to queue lid change "
170			    "callback: %s\n", sc->sc_dev.dv_xname,
171			    AcpiFormatException(rv));
172		break;
173
174	default:
175		printf("%s: received unknown notify message: 0x%x\n",
176		    sc->sc_dev.dv_xname, notify);
177	}
178}
179