acpi_lid.c revision 1.11 
1/*	$NetBSD: acpi_lid.c,v 1.11 2003/11/03 17:24:22 mycroft 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 1.11 2003/11/03 17:24:22 mycroft 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
66int	acpilid_match(struct device *, struct cfdata *, void *);
67void	acpilid_attach(struct device *, struct device *, void *);
68
69CFATTACH_DECL(acpilid, sizeof(struct acpilid_softc),
70    acpilid_match, acpilid_attach, NULL, NULL);
71
72void	acpilid_status_changed(void *);
73void	acpilid_notify_handler(ACPI_HANDLE, UINT32, void *context);
74
75/*
76 * acpilid_match:
77 *
78 *	Autoconfiguration `match' routine.
79 */
80int
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 */
96void
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	printf(": ACPI Lid Switch\n");
104
105	sc->sc_node = aa->aa_node;
106
107	sc->sc_smpsw.smpsw_name = sc->sc_dev.dv_xname;
108	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_LID;
109	if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) {
110		printf("%s: unable to register with sysmon\n",
111		    sc->sc_dev.dv_xname);
112		return;
113	}
114
115	rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
116	    ACPI_DEVICE_NOTIFY, acpilid_notify_handler, sc);
117	if (rv != AE_OK) {
118		printf("%s: unable to register DEVICE NOTIFY handler: %s\n",
119		    sc->sc_dev.dv_xname, AcpiFormatException(rv));
120		return;
121	}
122}
123
124/*
125 * acpilid_status_changed:
126 *
127 *	Get, and possibly display, the lid status, and take action.
128 */
129void
130acpilid_status_changed(void *arg)
131{
132	struct acpilid_softc *sc = arg;
133	int status;
134
135	if (acpi_eval_integer(sc->sc_node->ad_handle, "_LID",
136	    &status) != AE_OK)
137		return;
138
139	sysmon_pswitch_event(&sc->sc_smpsw, status == 0 ?
140	    PSWITCH_EVENT_PRESSED : PSWITCH_EVENT_RELEASED);
141}
142
143/*
144 * acpilid_notify_handler:
145 *
146 *	Callback from ACPI interrupt handler to notify us of an event.
147 */
148void
149acpilid_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
150{
151	struct acpilid_softc *sc = context;
152	int rv;
153
154	switch (notify) {
155	case ACPI_NOTIFY_LidStatusChanged:
156#ifdef ACPI_LID_DEBUG
157		printf("%s: received LidStatusChanged message\n",
158		    sc->sc_dev.dv_xname);
159#endif
160		rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
161		    acpilid_status_changed, sc);
162		if (rv != AE_OK)
163			printf("%s: WARNING: unable to queue lid change "
164			    "callback: %s\n", sc->sc_dev.dv_xname,
165			    AcpiFormatException(rv));
166		break;
167
168	default:
169		printf("%s: received unknown notify message: 0x%x\n",
170		    sc->sc_dev.dv_xname, notify);
171	}
172}
173