acpi_lid.c revision 1.2 
1/*	$NetBSD: acpi_lid.c,v 1.2 2001/09/29 05:36:49 thorpej Exp $	*/
2
3/*
4 * Copyright 2001 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/param.h>
43#include <sys/systm.h>
44#include <sys/device.h>
45
46#include <dev/acpi/acpica.h>
47#include <dev/acpi/acpireg.h>
48#include <dev/acpi/acpivar.h>
49
50struct acpilid_softc {
51	struct device sc_dev;		/* base device glue */
52	struct acpi_devnode *sc_node;	/* our ACPI devnode */
53	int sc_flags;			/* see below */
54};
55
56#define	ACPILID_F_VERBOSE		0x01	/* verbose events */
57
58int	acpilid_match(struct device *, struct cfdata *, void *);
59void	acpilid_attach(struct device *, struct device *, void *);
60
61struct cfattach acpilid_ca = {
62	sizeof(struct acpilid_softc), acpilid_match, acpilid_attach,
63};
64
65void	acpilid_status_changed(void *);
66void	acpilid_notify_handler(ACPI_HANDLE, UINT32, void *context);
67
68/*
69 * acpilid_match:
70 *
71 *	Autoconfiguration `match' routine.
72 */
73int
74acpilid_match(struct device *parent, struct cfdata *match, void *aux)
75{
76	struct acpi_attach_args *aa = aux;
77
78	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
79		return (0);
80
81	if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0D") == 0)
82		return (1);
83
84	return (0);
85}
86
87/*
88 * acpilid_attach:
89 *
90 *	Autoconfiguration `attach' routine.
91 */
92void
93acpilid_attach(struct device *parent, struct device *self, void *aux)
94{
95	struct acpilid_softc *sc = (void *) self;
96	struct acpi_attach_args *aa = aux;
97	ACPI_STATUS rv;
98
99	printf(": ACPI Lid Switch\n");
100
101	sc->sc_node = aa->aa_node;
102
103	rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
104	    ACPI_DEVICE_NOTIFY, acpilid_notify_handler, sc);
105	if (rv != AE_OK) {
106		printf("%s: unable to register device notify handler: %d\n",
107		    sc->sc_dev.dv_xname, rv);
108		return;
109	}
110
111	/* Display the current state when it changes. */
112	sc->sc_flags = ACPILID_F_VERBOSE;
113}
114
115/*
116 * acpilid_status_changed:
117 *
118 *	Get, and possibly display, the lid status, and take action.
119 */
120void
121acpilid_status_changed(void *arg)
122{
123	struct acpilid_softc *sc = arg;
124	int status;
125
126	if (acpi_eval_integer(sc->sc_node->ad_handle, "_LID",
127	    &status) != AE_OK)
128		return;
129
130	if (sc->sc_flags & ACPILID_F_VERBOSE)
131		printf("%s: Lid %s\n",
132		    sc->sc_dev.dv_xname,
133		    status == 0 ? "closed " : "open");
134
135	/*
136	 * XXX Perform the appropriate action for the new lid status.
137	 */
138}
139
140/*
141 * acpilid_notify_handler:
142 *
143 *	Callback from ACPI interrupt handler to notify us of an event.
144 */
145void
146acpilid_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
147{
148	struct acpilid_softc *sc = context;
149	int rv;
150
151	switch (notify) {
152	case ACPI_NOTIFY_LidStatusChanged:
153#ifdef ACPI_LID_DEBUG
154		printf("%s: received LidStatusChanged message\n",
155		    sc->sc_dev.dv_xname);
156#endif
157		rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
158		    acpilid_status_changed, sc);
159		if (rv != AE_OK)
160			printf("%s: WARNING: unable to queue lid change "
161			    "event: %d\n", sc->sc_dev.dv_xname, rv);
162		break;
163
164	default:
165		printf("%s: received unknown notify message: 0x%x\n",
166		    sc->sc_dev.dv_xname, notify);
167	}
168}
169