acpi_lid.c revision 1.37 
1/*	$NetBSD: acpi_lid.c,v 1.37 2010/03/05 21:01:44 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 1.37 2010/03/05 21:01:44 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, 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	ACPI_STATUS rv;
103
104	aprint_naive(": ACPI Lid Switch\n");
105	aprint_normal(": ACPI Lid Switch\n");
106
107	sc->sc_node = aa->aa_node;
108
109	sc->sc_smpsw.smpsw_name = device_xname(self);
110	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_LID;
111
112	(void)pmf_device_register(self, NULL, NULL);
113	(void)sysmon_pswitch_register(&sc->sc_smpsw);
114
115	rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
116	    ACPI_DEVICE_NOTIFY, acpilid_notify_handler, self);
117
118	if (ACPI_FAILURE(rv))
119		aprint_error_dev(self, "failed to register notify handler\n");
120}
121
122static int
123acpilid_detach(device_t self, int flags)
124{
125	struct acpilid_softc *sc = device_private(self);
126	ACPI_STATUS rv;
127
128	rv = AcpiRemoveNotifyHandler(sc->sc_node->ad_handle,
129	    ACPI_DEVICE_NOTIFY, acpilid_notify_handler);
130
131	if (ACPI_FAILURE(rv))
132		return EBUSY;
133
134	pmf_device_deregister(self);
135	sysmon_pswitch_unregister(&sc->sc_smpsw);
136
137	return 0;
138}
139
140/*
141 * acpilid_status_changed:
142 *
143 *	Get, and possibly display, the lid status, and take action.
144 */
145static void
146acpilid_status_changed(void *arg)
147{
148	device_t dv = arg;
149	struct acpilid_softc *sc = device_private(dv);
150	ACPI_STATUS rv;
151
152	rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &sc->sc_status);
153
154	if (ACPI_FAILURE(rv))
155		return;
156
157	sysmon_pswitch_event(&sc->sc_smpsw, (sc->sc_status == 0) ?
158	    PSWITCH_EVENT_PRESSED : PSWITCH_EVENT_RELEASED);
159}
160
161/*
162 * acpilid_notify_handler:
163 *
164 *	Callback from ACPI interrupt handler to notify us of an event.
165 */
166static void
167acpilid_notify_handler(ACPI_HANDLE handle, uint32_t notify, void *context)
168{
169	static const int handler = OSL_NOTIFY_HANDLER;
170	device_t dv = context;
171
172	switch (notify) {
173
174	case ACPI_NOTIFY_LidStatusChanged:
175		(void)AcpiOsExecute(handler, acpilid_status_changed, dv);
176		break;
177
178	default:
179		aprint_error_dev(dv, "unknown notify 0x%02X\n", notify);
180	}
181}
182
183#ifdef _MODULE
184
185MODULE(MODULE_CLASS_DRIVER, acpilid, NULL);
186CFDRIVER_DECL(acpilid, DV_DULL, NULL);
187
188static int acpilidloc[] = { -1 };
189extern struct cfattach acpilid_ca;
190
191static struct cfparent acpiparent = {
192	"acpinodebus", NULL, DVUNIT_ANY
193};
194
195static struct cfdata acpilid_cfdata[] = {
196	{
197		.cf_name = "acpilid",
198		.cf_atname = "acpilid",
199		.cf_unit = 0,
200		.cf_fstate = FSTATE_STAR,
201		.cf_loc = acpilidloc,
202		.cf_flags = 0,
203		.cf_pspec = &acpiparent,
204	},
205
206	{ NULL }
207};
208
209static int
210acpilid_modcmd(modcmd_t cmd, void *context)
211{
212	int err;
213
214	switch (cmd) {
215
216	case MODULE_CMD_INIT:
217
218		err = config_cfdriver_attach(&acpilid_cd);
219
220		if (err != 0)
221			return err;
222
223		err = config_cfattach_attach("acpilid", &acpilid_ca);
224
225		if (err != 0) {
226			config_cfdriver_detach(&acpilid_cd);
227			return err;
228		}
229
230		err = config_cfdata_attach(acpilid_cfdata, 1);
231
232		if (err != 0) {
233			config_cfattach_detach("acpilid", &acpilid_ca);
234			config_cfdriver_detach(&acpilid_cd);
235			return err;
236		}
237
238		return 0;
239
240	case MODULE_CMD_FINI:
241
242		err = config_cfdata_detach(acpilid_cfdata);
243
244		if (err != 0)
245			return err;
246
247		config_cfattach_detach("acpilid", &acpilid_ca);
248		config_cfdriver_detach(&acpilid_cd);
249
250		return 0;
251
252	default:
253		return ENOTTY;
254	}
255}
256
257#endif	/* _MODULE */
258