acpi_lid.c revision 1.40 
1/*	$NetBSD: acpi_lid.c,v 1.40 2010/04/27 05:57:43 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 1.40 2010/04/27 05:57:43 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
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 char * const lid_hid[] = {
65	"PNP0C0D",
66	NULL
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	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
89		return 0;
90
91	return acpi_match_hid(aa->aa_node->ad_devinfo, lid_hid);
92}
93
94/*
95 * acpilid_attach:
96 *
97 *	Autoconfiguration `attach' routine.
98 */
99static void
100acpilid_attach(device_t parent, device_t self, void *aux)
101{
102	struct acpilid_softc *sc = device_private(self);
103	struct acpi_attach_args *aa = aux;
104
105	aprint_naive(": ACPI Lid Switch\n");
106	aprint_normal(": ACPI Lid Switch\n");
107
108	sc->sc_node = aa->aa_node;
109
110	sc->sc_smpsw.smpsw_name = device_xname(self);
111	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_LID;
112
113	(void)pmf_device_register(self, NULL, NULL);
114	(void)sysmon_pswitch_register(&sc->sc_smpsw);
115	(void)acpi_register_notify(sc->sc_node, acpilid_notify_handler);
116}
117
118static int
119acpilid_detach(device_t self, int flags)
120{
121	struct acpilid_softc *sc = device_private(self);
122
123	pmf_device_deregister(self);
124	acpi_deregister_notify(sc->sc_node);
125	sysmon_pswitch_unregister(&sc->sc_smpsw);
126
127	return 0;
128}
129
130/*
131 * acpilid_status_changed:
132 *
133 *	Get, and possibly display, the lid status, and take action.
134 */
135static void
136acpilid_status_changed(void *arg)
137{
138	device_t dv = arg;
139	struct acpilid_softc *sc = device_private(dv);
140	ACPI_STATUS rv;
141
142	rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &sc->sc_status);
143
144	if (ACPI_FAILURE(rv))
145		return;
146
147	sysmon_pswitch_event(&sc->sc_smpsw, (sc->sc_status == 0) ?
148	    PSWITCH_EVENT_PRESSED : PSWITCH_EVENT_RELEASED);
149}
150
151/*
152 * acpilid_notify_handler:
153 *
154 *	Callback from ACPI interrupt handler to notify us of an event.
155 */
156static void
157acpilid_notify_handler(ACPI_HANDLE handle, uint32_t notify, void *context)
158{
159	static const int handler = OSL_NOTIFY_HANDLER;
160	device_t dv = context;
161
162	switch (notify) {
163
164	case ACPI_NOTIFY_LID:
165		(void)AcpiOsExecute(handler, acpilid_status_changed, dv);
166		break;
167
168	default:
169		aprint_error_dev(dv, "unknown notify 0x%02X\n", notify);
170	}
171}
172
173#ifdef _MODULE
174
175MODULE(MODULE_CLASS_DRIVER, acpilid, NULL);
176CFDRIVER_DECL(acpilid, DV_DULL, NULL);
177
178static int acpilidloc[] = { -1 };
179extern struct cfattach acpilid_ca;
180
181static struct cfparent acpiparent = {
182	"acpinodebus", NULL, DVUNIT_ANY
183};
184
185static struct cfdata acpilid_cfdata[] = {
186	{
187		.cf_name = "acpilid",
188		.cf_atname = "acpilid",
189		.cf_unit = 0,
190		.cf_fstate = FSTATE_STAR,
191		.cf_loc = acpilidloc,
192		.cf_flags = 0,
193		.cf_pspec = &acpiparent,
194	},
195
196	{ NULL }
197};
198
199static int
200acpilid_modcmd(modcmd_t cmd, void *context)
201{
202	int err;
203
204	switch (cmd) {
205
206	case MODULE_CMD_INIT:
207
208		err = config_cfdriver_attach(&acpilid_cd);
209
210		if (err != 0)
211			return err;
212
213		err = config_cfattach_attach("acpilid", &acpilid_ca);
214
215		if (err != 0) {
216			config_cfdriver_detach(&acpilid_cd);
217			return err;
218		}
219
220		err = config_cfdata_attach(acpilid_cfdata, 1);
221
222		if (err != 0) {
223			config_cfattach_detach("acpilid", &acpilid_ca);
224			config_cfdriver_detach(&acpilid_cd);
225			return err;
226		}
227
228		return 0;
229
230	case MODULE_CMD_FINI:
231
232		err = config_cfdata_detach(acpilid_cfdata);
233
234		if (err != 0)
235			return err;
236
237		config_cfattach_detach("acpilid", &acpilid_ca);
238		config_cfdriver_detach(&acpilid_cd);
239
240		return 0;
241
242	default:
243		return ENOTTY;
244	}
245}
246
247#endif	/* _MODULE */
248