acpi_lid.c revision 1.4 
1/*	$NetBSD: acpi_lid.c,v 1.4 2002/09/27 20:37:34 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 1.4 2002/09/27 20:37:34 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
64const struct cfattach acpilid_ca = {
65	sizeof(struct acpilid_softc), acpilid_match, acpilid_attach,
66};
67
68void	acpilid_status_changed(void *);
69void	acpilid_notify_handler(ACPI_HANDLE, UINT32, void *context);
70
71/*
72 * acpilid_match:
73 *
74 *	Autoconfiguration `match' routine.
75 */
76int
77acpilid_match(struct device *parent, struct cfdata *match, void *aux)
78{
79	struct acpi_attach_args *aa = aux;
80
81	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
82		return (0);
83
84	if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0D") == 0)
85		return (1);
86
87	return (0);
88}
89
90/*
91 * acpilid_attach:
92 *
93 *	Autoconfiguration `attach' routine.
94 */
95void
96acpilid_attach(struct device *parent, struct device *self, void *aux)
97{
98	struct acpilid_softc *sc = (void *) self;
99	struct acpi_attach_args *aa = aux;
100	ACPI_STATUS rv;
101
102	printf(": ACPI Lid Switch\n");
103
104	sc->sc_node = aa->aa_node;
105
106	rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
107	    ACPI_DEVICE_NOTIFY, acpilid_notify_handler, sc);
108	if (rv != AE_OK) {
109		printf("%s: unable to register device notify handler: %d\n",
110		    sc->sc_dev.dv_xname, rv);
111		return;
112	}
113
114	/* Display the current state when it changes. */
115	sc->sc_flags = ACPILID_F_VERBOSE;
116}
117
118/*
119 * acpilid_status_changed:
120 *
121 *	Get, and possibly display, the lid status, and take action.
122 */
123void
124acpilid_status_changed(void *arg)
125{
126	struct acpilid_softc *sc = arg;
127	int status;
128
129	if (acpi_eval_integer(sc->sc_node->ad_handle, "_LID",
130	    &status) != AE_OK)
131		return;
132
133	if (sc->sc_flags & ACPILID_F_VERBOSE)
134		printf("%s: Lid %s\n",
135		    sc->sc_dev.dv_xname,
136		    status == 0 ? "closed " : "open");
137
138	/*
139	 * XXX Perform the appropriate action for the new lid status.
140	 */
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			    "event: %d\n", sc->sc_dev.dv_xname, rv);
165		break;
166
167	default:
168		printf("%s: received unknown notify message: 0x%x\n",
169		    sc->sc_dev.dv_xname, notify);
170	}
171}
172