acpi_lid.c revision 1.6 
1/*	$NetBSD: acpi_lid.c,v 1.6 2002/10/02 16:33:37 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/cdefs.h>
43__KERNEL_RCSID(0, "$NetBSD: acpi_lid.c,v 1.6 2002/10/02 16:33:37 thorpej 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
53struct acpilid_softc {
54	struct device sc_dev;		/* base device glue */
55	struct acpi_devnode *sc_node;	/* our ACPI devnode */
56	int sc_flags;			/* see below */
57};
58
59#define	ACPILID_F_VERBOSE		0x01	/* verbose events */
60
61int	acpilid_match(struct device *, struct cfdata *, void *);
62void	acpilid_attach(struct device *, struct device *, void *);
63
64CFATTACH_DECL(acpilid, sizeof(struct acpilid_softc),
65    acpilid_match, acpilid_attach, NULL, NULL);
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	/* Display the current state when it changes. */
114	sc->sc_flags = ACPILID_F_VERBOSE;
115}
116
117/*
118 * acpilid_status_changed:
119 *
120 *	Get, and possibly display, the lid status, and take action.
121 */
122void
123acpilid_status_changed(void *arg)
124{
125	struct acpilid_softc *sc = arg;
126	int status;
127
128	if (acpi_eval_integer(sc->sc_node->ad_handle, "_LID",
129	    &status) != AE_OK)
130		return;
131
132	if (sc->sc_flags & ACPILID_F_VERBOSE)
133		printf("%s: Lid %s\n",
134		    sc->sc_dev.dv_xname,
135		    status == 0 ? "closed " : "open");
136
137	/*
138	 * XXX Perform the appropriate action for the new lid status.
139	 */
140}
141
142/*
143 * acpilid_notify_handler:
144 *
145 *	Callback from ACPI interrupt handler to notify us of an event.
146 */
147void
148acpilid_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
149{
150	struct acpilid_softc *sc = context;
151	int rv;
152
153	switch (notify) {
154	case ACPI_NOTIFY_LidStatusChanged:
155#ifdef ACPI_LID_DEBUG
156		printf("%s: received LidStatusChanged message\n",
157		    sc->sc_dev.dv_xname);
158#endif
159		rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
160		    acpilid_status_changed, sc);
161		if (rv != AE_OK)
162			printf("%s: WARNING: unable to queue lid change "
163			    "event: %d\n", sc->sc_dev.dv_xname, rv);
164		break;
165
166	default:
167		printf("%s: received unknown notify message: 0x%x\n",
168		    sc->sc_dev.dv_xname, notify);
169	}
170}
171