acpi_lid.c revision 1.1 
1/*	$NetBSD: acpi_lid.c,v 1.1 2001/09/28 02:30:13 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
50#define	ACPI_LID_DEBUG
51
52struct acpilid_softc {
53	struct device sc_dev;		/* base device glue */
54	struct acpi_devnode *sc_node;	/* our ACPI devnode */
55	int sc_flags;			/* see below */
56};
57
58#define	ACPILID_F_VERBOSE		0x01	/* verbose events */
59
60int	acpilid_match(struct device *, struct cfdata *, void *);
61void	acpilid_attach(struct device *, struct device *, void *);
62
63struct cfattach acpilid_ca = {
64	sizeof(struct acpilid_softc), acpilid_match, acpilid_attach,
65};
66
67void	acpilid_status_changed(void *);
68void	acpilid_notify_handler(ACPI_HANDLE, UINT32, void *context);
69
70/*
71 * acpilid_match:
72 *
73 *	Autoconfiguration `match' routine.
74 */
75int
76acpilid_match(struct device *parent, struct cfdata *match, void *aux)
77{
78	struct acpi_attach_args *aa = aux;
79
80	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
81		return (0);
82
83	if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0D") == 0)
84		return (1);
85
86	return (0);
87}
88
89/*
90 * acpilid_attach:
91 *
92 *	Autoconfiguration `attach' routine.
93 */
94void
95acpilid_attach(struct device *parent, struct device *self, void *aux)
96{
97	struct acpilid_softc *sc = (void *) self;
98	struct acpi_attach_args *aa = aux;
99	ACPI_STATUS rv;
100
101	printf(": ACPI Lid Switch\n");
102
103	sc->sc_node = aa->aa_node;
104
105	rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
106	    ACPI_DEVICE_NOTIFY, acpilid_notify_handler, sc);
107	if (rv != AE_OK) {
108		printf("%s: unable to register device notify handler: %d\n",
109		    sc->sc_dev.dv_xname, rv);
110		return;
111	}
112
113#ifdef ACPI_LID_DEBUG
114	/* Display the current state when it changes. */
115	sc->sc_flags = ACPILID_F_VERBOSE;
116#endif
117}
118
119/*
120 * acpilid_status_changed:
121 *
122 *	Get, and possibly display, the lid status, and take action.
123 */
124void
125acpilid_status_changed(void *arg)
126{
127	struct acpilid_softc *sc = arg;
128	int status;
129
130	if (acpi_eval_integer(sc->sc_node->ad_handle, "_LID",
131	    &status) != AE_OK)
132		return;
133
134	if (sc->sc_flags & ACPILID_F_VERBOSE)
135		printf("%s: Lid %s\n",
136		    sc->sc_dev.dv_xname,
137		    status == 0 ? "closed " : "open");
138
139	/*
140	 * XXX Perform the appropriate action for the new lid status.
141	 */
142}
143
144/*
145 * acpilid_notify_handler:
146 *
147 *	Callback from ACPI interrupt handler to notify us of an event.
148 */
149void
150acpilid_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
151{
152	struct acpilid_softc *sc = context;
153	int rv;
154
155	switch (notify) {
156	case ACPI_NOTIFY_LidStatusChanged:
157#ifdef ACPI_LID_DEBUG
158		printf("%s: received LidStatusChanged message\n",
159		    sc->sc_dev.dv_xname);
160#endif
161		rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
162		    acpilid_status_changed, sc);
163		if (rv != AE_OK)
164			printf("%s: WARNING: unable to queue lid change "
165			    "event: %d\n", sc->sc_dev.dv_xname, 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