acpi_lid.c revision 1.39 
1/*	$NetBSD: acpi_lid.c,v 1.39 2010/04/15 07:02:24 jruoho 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 1.39 2010/04/15 07:02:24 jruoho 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
56struct acpilid_softc {
57	struct acpi_devnode	*sc_node;
58	struct sysmon_pswitch	 sc_smpsw;
59	uint64_t		 sc_status;
60};
61
62static const char * const lid_hid[] = {
63	"PNP0C0D",
64	NULL
65};
66
67static int	acpilid_match(device_t, cfdata_t, void *);
68static void	acpilid_attach(device_t, device_t, void *);
69static int	acpilid_detach(device_t, int);
70static void	acpilid_status_changed(void *);
71static void	acpilid_notify_handler(ACPI_HANDLE, uint32_t, void *);
72
73CFATTACH_DECL_NEW(acpilid, sizeof(struct acpilid_softc),
74    acpilid_match, acpilid_attach, acpilid_detach, NULL);
75
76/*
77 * acpilid_match:
78 *
79 *	Autoconfiguration `match' routine.
80 */
81static int
82acpilid_match(device_t parent, cfdata_t match, void *aux)
83{
84	struct acpi_attach_args *aa = aux;
85
86	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
87		return 0;
88
89	return acpi_match_hid(aa->aa_node->ad_devinfo, lid_hid);
90}
91
92/*
93 * acpilid_attach:
94 *
95 *	Autoconfiguration `attach' routine.
96 */
97static void
98acpilid_attach(device_t parent, device_t self, void *aux)
99{
100	struct acpilid_softc *sc = device_private(self);
101	struct acpi_attach_args *aa = aux;
102
103	aprint_naive(": ACPI Lid Switch\n");
104	aprint_normal(": ACPI Lid Switch\n");
105
106	sc->sc_node = aa->aa_node;
107
108	sc->sc_smpsw.smpsw_name = device_xname(self);
109	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_LID;
110
111	(void)pmf_device_register(self, NULL, NULL);
112	(void)sysmon_pswitch_register(&sc->sc_smpsw);
113	(void)acpi_register_notify(sc->sc_node, acpilid_notify_handler);
114}
115
116static int
117acpilid_detach(device_t self, int flags)
118{
119	struct acpilid_softc *sc = device_private(self);
120
121	pmf_device_deregister(self);
122	acpi_deregister_notify(sc->sc_node);
123	sysmon_pswitch_unregister(&sc->sc_smpsw);
124
125	return 0;
126}
127
128/*
129 * acpilid_status_changed:
130 *
131 *	Get, and possibly display, the lid status, and take action.
132 */
133static void
134acpilid_status_changed(void *arg)
135{
136	device_t dv = arg;
137	struct acpilid_softc *sc = device_private(dv);
138	ACPI_STATUS rv;
139
140	rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &sc->sc_status);
141
142	if (ACPI_FAILURE(rv))
143		return;
144
145	sysmon_pswitch_event(&sc->sc_smpsw, (sc->sc_status == 0) ?
146	    PSWITCH_EVENT_PRESSED : PSWITCH_EVENT_RELEASED);
147}
148
149/*
150 * acpilid_notify_handler:
151 *
152 *	Callback from ACPI interrupt handler to notify us of an event.
153 */
154static void
155acpilid_notify_handler(ACPI_HANDLE handle, uint32_t notify, void *context)
156{
157	static const int handler = OSL_NOTIFY_HANDLER;
158	device_t dv = context;
159
160	switch (notify) {
161
162	case ACPI_NOTIFY_LidStatusChanged:
163		(void)AcpiOsExecute(handler, acpilid_status_changed, dv);
164		break;
165
166	default:
167		aprint_error_dev(dv, "unknown notify 0x%02X\n", notify);
168	}
169}
170
171#ifdef _MODULE
172
173MODULE(MODULE_CLASS_DRIVER, acpilid, NULL);
174CFDRIVER_DECL(acpilid, DV_DULL, NULL);
175
176static int acpilidloc[] = { -1 };
177extern struct cfattach acpilid_ca;
178
179static struct cfparent acpiparent = {
180	"acpinodebus", NULL, DVUNIT_ANY
181};
182
183static struct cfdata acpilid_cfdata[] = {
184	{
185		.cf_name = "acpilid",
186		.cf_atname = "acpilid",
187		.cf_unit = 0,
188		.cf_fstate = FSTATE_STAR,
189		.cf_loc = acpilidloc,
190		.cf_flags = 0,
191		.cf_pspec = &acpiparent,
192	},
193
194	{ NULL }
195};
196
197static int
198acpilid_modcmd(modcmd_t cmd, void *context)
199{
200	int err;
201
202	switch (cmd) {
203
204	case MODULE_CMD_INIT:
205
206		err = config_cfdriver_attach(&acpilid_cd);
207
208		if (err != 0)
209			return err;
210
211		err = config_cfattach_attach("acpilid", &acpilid_ca);
212
213		if (err != 0) {
214			config_cfdriver_detach(&acpilid_cd);
215			return err;
216		}
217
218		err = config_cfdata_attach(acpilid_cfdata, 1);
219
220		if (err != 0) {
221			config_cfattach_detach("acpilid", &acpilid_ca);
222			config_cfdriver_detach(&acpilid_cd);
223			return err;
224		}
225
226		return 0;
227
228	case MODULE_CMD_FINI:
229
230		err = config_cfdata_detach(acpilid_cfdata);
231
232		if (err != 0)
233			return err;
234
235		config_cfattach_detach("acpilid", &acpilid_ca);
236		config_cfdriver_detach(&acpilid_cd);
237
238		return 0;
239
240	default:
241		return ENOTTY;
242	}
243}
244
245#endif	/* _MODULE */
246