acpi_lid.c revision 1.45 
1/*	$NetBSD: acpi_lid.c,v 1.45 2021/01/29 15:49:55 thorpej 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 1.45 2021/01/29 15:49:55 thorpej Exp $");
44
45#include <sys/param.h>
46#include <sys/device.h>
47#include <sys/module.h>
48#include <sys/systm.h>
49
50#include <dev/acpi/acpireg.h>
51#include <dev/acpi/acpivar.h>
52
53#define _COMPONENT		 ACPI_LID_COMPONENT
54ACPI_MODULE_NAME		 ("acpi_lid")
55
56#define ACPI_NOTIFY_LID		 0x80
57
58struct acpilid_softc {
59	struct acpi_devnode	*sc_node;
60	struct sysmon_pswitch	 sc_smpsw;
61	uint64_t		 sc_status;
62};
63
64static const struct device_compatible_entry compat_data[] = {
65	{ .compat = "PNP0C0D" },
66	DEVICE_COMPAT_EOL
67};
68
69static int	acpilid_match(device_t, cfdata_t, void *);
70static void	acpilid_attach(device_t, device_t, void *);
71static int	acpilid_detach(device_t, int);
72static void	acpilid_status_changed(void *);
73static void	acpilid_notify_handler(ACPI_HANDLE, uint32_t, void *);
74
75CFATTACH_DECL_NEW(acpilid, sizeof(struct acpilid_softc),
76    acpilid_match, acpilid_attach, acpilid_detach, NULL);
77
78/*
79 * acpilid_match:
80 *
81 *	Autoconfiguration `match' routine.
82 */
83static int
84acpilid_match(device_t parent, cfdata_t match, void *aux)
85{
86	struct acpi_attach_args *aa = aux;
87
88	return acpi_compatible_match(aa, compat_data);
89}
90
91/*
92 * acpilid_attach:
93 *
94 *	Autoconfiguration `attach' routine.
95 */
96static void
97acpilid_attach(device_t parent, device_t self, void *aux)
98{
99	struct acpilid_softc *sc = device_private(self);
100	struct acpi_attach_args *aa = aux;
101
102	aprint_naive(": ACPI Lid Switch\n");
103	aprint_normal(": ACPI Lid Switch\n");
104
105	sc->sc_node = aa->aa_node;
106
107	sc->sc_smpsw.smpsw_name = device_xname(self);
108	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_LID;
109
110	(void)pmf_device_register(self, NULL, NULL);
111	(void)sysmon_pswitch_register(&sc->sc_smpsw);
112	(void)acpi_register_notify(sc->sc_node, acpilid_notify_handler);
113}
114
115static int
116acpilid_detach(device_t self, int flags)
117{
118	struct acpilid_softc *sc = device_private(self);
119
120	pmf_device_deregister(self);
121	acpi_deregister_notify(sc->sc_node);
122	sysmon_pswitch_unregister(&sc->sc_smpsw);
123
124	return 0;
125}
126
127/*
128 * acpilid_status_changed:
129 *
130 *	Get, and possibly display, the lid status, and take action.
131 */
132static void
133acpilid_status_changed(void *arg)
134{
135	device_t dv = arg;
136	struct acpilid_softc *sc = device_private(dv);
137	ACPI_STATUS rv;
138
139	rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &sc->sc_status);
140
141	if (ACPI_FAILURE(rv))
142		return;
143
144	sysmon_pswitch_event(&sc->sc_smpsw, (sc->sc_status == 0) ?
145	    PSWITCH_EVENT_PRESSED : PSWITCH_EVENT_RELEASED);
146}
147
148/*
149 * acpilid_notify_handler:
150 *
151 *	Callback from ACPI interrupt handler to notify us of an event.
152 */
153static void
154acpilid_notify_handler(ACPI_HANDLE handle, uint32_t notify, void *context)
155{
156	static const int handler = OSL_NOTIFY_HANDLER;
157	device_t dv = context;
158
159	switch (notify) {
160
161	case ACPI_NOTIFY_LID:
162		(void)AcpiOsExecute(handler, acpilid_status_changed, dv);
163		break;
164
165	case ACPI_NOTIFY_DEVICE_WAKE:
166		break;
167
168	default:
169		aprint_debug_dev(dv, "unknown notify 0x%02X\n", notify);
170	}
171}
172
173MODULE(MODULE_CLASS_DRIVER, acpilid, "sysmon_power");
174
175#ifdef _MODULE
176#include "ioconf.c"
177#endif
178
179static int
180acpilid_modcmd(modcmd_t cmd, void *aux)
181{
182	int rv = 0;
183
184	switch (cmd) {
185
186	case MODULE_CMD_INIT:
187
188#ifdef _MODULE
189		rv = config_init_component(cfdriver_ioconf_acpilid,
190		    cfattach_ioconf_acpilid, cfdata_ioconf_acpilid);
191#endif
192		break;
193
194	case MODULE_CMD_FINI:
195
196#ifdef _MODULE
197		rv = config_fini_component(cfdriver_ioconf_acpilid,
198		    cfattach_ioconf_acpilid, cfdata_ioconf_acpilid);
199#endif
200		break;
201
202	default:
203		rv = ENOTTY;
204	}
205
206	return rv;
207}
208