1/* $NetBSD: acpi_button.c,v 1.42 2015/04/23 23:23:00 pgoyette 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 Button driver.
40 */
41
42#include <sys/cdefs.h>
43__KERNEL_RCSID(0, "$NetBSD: acpi_button.c,v 1.42 2015/04/23 23:23:00 pgoyette 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#include <dev/acpi/acpi_wakedev.h>
53
54#define _COMPONENT ACPI_BUTTON_COMPONENT
55ACPI_MODULE_NAME ("acpi_button")
56
57#define ACPI_NOTIFY_BUTTON 0x80
58
59struct acpibut_softc {
60 struct acpi_devnode *sc_node;
61 struct sysmon_pswitch sc_smpsw;
62};
63
64static const char * const power_button_hid[] = {
65 "PNP0C0C",
66 NULL
67};
68
69static const char * const sleep_button_hid[] = {
70 "PNP0C0E",
71 NULL
72};
73
74static int acpibut_match(device_t, cfdata_t, void *);
75static void acpibut_attach(device_t, device_t, void *);
76static int acpibut_detach(device_t, int);
77static void acpibut_pressed_event(void *);
78static void acpibut_notify_handler(ACPI_HANDLE, uint32_t, void *);
79
80CFATTACH_DECL_NEW(acpibut, sizeof(struct acpibut_softc),
81 acpibut_match, acpibut_attach, acpibut_detach, NULL);
82
83/*
84 * acpibut_match:
85 *
86 * Autoconfiguration `match' routine.
87 */
88static int
89acpibut_match(device_t parent, cfdata_t match, void *aux)
90{
91 struct acpi_attach_args *aa = aux;
92
93 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
94 return 0;
95
96 if (acpi_match_hid(aa->aa_node->ad_devinfo, power_button_hid))
97 return 1;
98
99 if (acpi_match_hid(aa->aa_node->ad_devinfo, sleep_button_hid))
100 return 1;
101
102 return 0;
103}
104
105/*
106 * acpibut_attach:
107 *
108 * Autoconfiguration `attach' routine.
109 */
110static void
111acpibut_attach(device_t parent, device_t self, void *aux)
112{
113 struct acpibut_softc *sc = device_private(self);
114 struct acpi_attach_args *aa = aux;
115 struct acpi_wakedev *aw;
116 const char *desc;
117
118 sc->sc_smpsw.smpsw_name = device_xname(self);
119
120 if (acpi_match_hid(aa->aa_node->ad_devinfo, power_button_hid)) {
121 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_POWER;
122 desc = "Power";
123 } else if (acpi_match_hid(aa->aa_node->ad_devinfo, sleep_button_hid)) {
124 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_SLEEP;
125 desc = "Sleep";
126 } else
127 panic("%s: impossible", __func__);
128
129 aprint_naive(": ACPI %s Button\n", desc);
130 aprint_normal(": ACPI %s Button\n", desc);
131
132 sc->sc_node = aa->aa_node;
133 aw = sc->sc_node->ad_wakedev;
134
135 /*
136 * This GPE should always be enabled.
137 */
138 if (aw != NULL)
139 (void)AcpiEnableGpe(aw->aw_handle, aw->aw_number);
140
141 (void)pmf_device_register(self, NULL, NULL);
142 (void)sysmon_pswitch_register(&sc->sc_smpsw);
143 (void)acpi_register_notify(sc->sc_node, acpibut_notify_handler);
144}
145
146/*
147 * acpibut_detach:
148 *
149 * Autoconfiguration `detach' routine.
150 */
151static int
152acpibut_detach(device_t self, int flags)
153{
154 struct acpibut_softc *sc = device_private(self);
155
156 pmf_device_deregister(self);
157 acpi_deregister_notify(sc->sc_node);
158 sysmon_pswitch_unregister(&sc->sc_smpsw);
159
160 return 0;
161}
162
163/*
164 * acpibut_pressed_event:
165 *
166 * Deal with a button being pressed.
167 */
168static void
169acpibut_pressed_event(void *arg)
170{
171 device_t dv = arg;
172 struct acpibut_softc *sc = device_private(dv);
173
174 aprint_debug_dev(dv, "button pressed\n");
175 sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
176}
177
178/*
179 * acpibut_notify_handler:
180 *
181 * Callback from ACPI interrupt handler to notify us of an event.
182 */
183static void
184acpibut_notify_handler(ACPI_HANDLE handle, uint32_t notify, void *context)
185{
186 static const int handler = OSL_NOTIFY_HANDLER;
187 device_t dv = context;
188
189 switch (notify) {
190
191 case ACPI_NOTIFY_BUTTON:
192 (void)AcpiOsExecute(handler, acpibut_pressed_event, dv);
193 break;
194
195 case ACPI_NOTIFY_DEVICE_WAKE:
196 break;
197
198 default:
199 aprint_debug_dev(dv, "unknown notify 0x%02X\n", notify);
200 }
201}
202
203MODULE(MODULE_CLASS_DRIVER, acpibut, "sysmon_power");
204
205#ifdef _MODULE
206#include "ioconf.c"
207#endif
208
209static int
210acpibut_modcmd(modcmd_t cmd, void *aux)
211{
212 int rv = 0;
213
214 switch (cmd) {
215
216 case MODULE_CMD_INIT:
217
218#ifdef _MODULE
219 rv = config_init_component(cfdriver_ioconf_acpibut,
220 cfattach_ioconf_acpibut, cfdata_ioconf_acpibut);
221#endif
222 break;
223
224 case MODULE_CMD_FINI:
225
226#ifdef _MODULE
227 rv = config_fini_component(cfdriver_ioconf_acpibut,
228 cfattach_ioconf_acpibut, cfdata_ioconf_acpibut);
229#endif
230 break;
231
232 default:
233 rv = ENOTTY;
234 }
235
236 return rv;
237}
238