1 /*-
2 * Copyright (c) 2000 Mitsaru IWASAKI <iwasaki@jp.freebsd.org>
3 * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
4 * Copyright (c) 2000 BSDi
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/11.1/sys/dev/acpica/acpi_button.c 246128 2013-01-30 18:01:20Z sbz $");
31
32 #include "opt_acpi.h"
33 #include <sys/param.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/bus.h>
37
38 #include <contrib/dev/acpica/include/acpi.h>
39 #include <contrib/dev/acpica/include/accommon.h>
40
41 #include <dev/acpica/acpivar.h>
42
43 /* Hooks for the ACPI CA debugging infrastructure */
44 #define _COMPONENT ACPI_BUTTON
45 ACPI_MODULE_NAME("BUTTON")
46
47 struct acpi_button_softc {
48 device_t button_dev;
49 ACPI_HANDLE button_handle;
50 boolean_t button_type;
51 #define ACPI_POWER_BUTTON 0
52 #define ACPI_SLEEP_BUTTON 1
53 boolean_t fixed;
54 };
55
56 #define ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP 0x80
57 #define ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP 0x02
58
59 static int acpi_button_probe(device_t dev);
60 static int acpi_button_attach(device_t dev);
61 static int acpi_button_suspend(device_t dev);
62 static int acpi_button_resume(device_t dev);
63 static void acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify,
64 void *context);
65 static ACPI_STATUS
66 acpi_button_fixed_handler(void *context);
67 static void acpi_button_notify_sleep(void *arg);
68 static void acpi_button_notify_wakeup(void *arg);
69
70 static char *btn_ids[] = {
71 "PNP0C0C", "ACPI_FPB", "PNP0C0E", "ACPI_FSB",
72 NULL
73 };
74
75 static device_method_t acpi_button_methods[] = {
76 /* Device interface */
77 DEVMETHOD(device_probe, acpi_button_probe),
78 DEVMETHOD(device_attach, acpi_button_attach),
79 DEVMETHOD(device_suspend, acpi_button_suspend),
80 DEVMETHOD(device_shutdown, acpi_button_suspend),
81 DEVMETHOD(device_resume, acpi_button_resume),
82 DEVMETHOD_END
83 };
84
85 static driver_t acpi_button_driver = {
86 "acpi_button",
87 acpi_button_methods,
88 sizeof(struct acpi_button_softc),
89 };
90
91 static devclass_t acpi_button_devclass;
92 DRIVER_MODULE(acpi_button, acpi, acpi_button_driver, acpi_button_devclass,
93 0, 0);
94 MODULE_DEPEND(acpi_button, acpi, 1, 1, 1);
95
96 static int
97 acpi_button_probe(device_t dev)
98 {
99 struct acpi_button_softc *sc;
100 char *str;
101
102 if (acpi_disabled("button") ||
103 (str = ACPI_ID_PROBE(device_get_parent(dev), dev, btn_ids)) == NULL)
104 return (ENXIO);
105
106 sc = device_get_softc(dev);
107 if (strcmp(str, "PNP0C0C") == 0) {
108 device_set_desc(dev, "Power Button");
109 sc->button_type = ACPI_POWER_BUTTON;
110 } else if (strcmp(str, "ACPI_FPB") == 0) {
111 device_set_desc(dev, "Power Button (fixed)");
112 sc->button_type = ACPI_POWER_BUTTON;
113 sc->fixed = 1;
114 } else if (strcmp(str, "PNP0C0E") == 0) {
115 device_set_desc(dev, "Sleep Button");
116 sc->button_type = ACPI_SLEEP_BUTTON;
117 } else if (strcmp(str, "ACPI_FSB") == 0) {
118 device_set_desc(dev, "Sleep Button (fixed)");
119 sc->button_type = ACPI_SLEEP_BUTTON;
120 sc->fixed = 1;
121 }
122
123 return (0);
124 }
125
126 static int
127 acpi_button_attach(device_t dev)
128 {
129 struct acpi_prw_data prw;
130 struct acpi_button_softc *sc;
131 ACPI_STATUS status;
132 int event;
133
134 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
135
136 sc = device_get_softc(dev);
137 sc->button_dev = dev;
138 sc->button_handle = acpi_get_handle(dev);
139 event = (sc->button_type == ACPI_SLEEP_BUTTON) ?
140 ACPI_EVENT_SLEEP_BUTTON : ACPI_EVENT_POWER_BUTTON;
141
142 /*
143 * Install the new handler. We could remove any fixed handlers added
144 * from the FADT once we have a duplicate from the AML but some systems
145 * only return events on one or the other so we have to keep both.
146 */
147 if (sc->fixed) {
148 AcpiClearEvent(event);
149 status = AcpiInstallFixedEventHandler(event,
150 acpi_button_fixed_handler, sc);
151 } else {
152 /*
153 * If a system does not get lid events, it may make sense to change
154 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake
155 * and runtime notify in that case though.
156 */
157 status = AcpiInstallNotifyHandler(sc->button_handle,
158 ACPI_DEVICE_NOTIFY, acpi_button_notify_handler, sc);
159 }
160 if (ACPI_FAILURE(status)) {
161 device_printf(sc->button_dev, "couldn't install notify handler - %s\n",
162 AcpiFormatException(status));
163 return_VALUE (ENXIO);
164 }
165
166 /* Enable the GPE for wake/runtime. */
167 acpi_wake_set_enable(dev, 1);
168 if (acpi_parse_prw(sc->button_handle, &prw) == 0)
169 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
170
171 return_VALUE (0);
172 }
173
174 static int
175 acpi_button_suspend(device_t dev)
176 {
177 return (0);
178 }
179
180 static int
181 acpi_button_resume(device_t dev)
182 {
183 return (0);
184 }
185
186 static void
187 acpi_button_notify_sleep(void *arg)
188 {
189 struct acpi_button_softc *sc;
190 struct acpi_softc *acpi_sc;
191
192 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
193
194 sc = (struct acpi_button_softc *)arg;
195 acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
196 if (acpi_sc == NULL)
197 return_VOID;
198
199 acpi_UserNotify("Button", sc->button_handle, sc->button_type);
200
201 switch (sc->button_type) {
202 case ACPI_POWER_BUTTON:
203 ACPI_VPRINT(sc->button_dev, acpi_sc, "power button pressed\n");
204 acpi_event_power_button_sleep(acpi_sc);
205 break;
206 case ACPI_SLEEP_BUTTON:
207 ACPI_VPRINT(sc->button_dev, acpi_sc, "sleep button pressed\n");
208 acpi_event_sleep_button_sleep(acpi_sc);
209 break;
210 default:
211 break; /* unknown button type */
212 }
213 }
214
215 static void
216 acpi_button_notify_wakeup(void *arg)
217 {
218 struct acpi_button_softc *sc;
219 struct acpi_softc *acpi_sc;
220
221 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
222
223 sc = (struct acpi_button_softc *)arg;
224 acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
225 if (acpi_sc == NULL)
226 return_VOID;
227
228 acpi_UserNotify("Button", sc->button_handle, sc->button_type);
229
230 switch (sc->button_type) {
231 case ACPI_POWER_BUTTON:
232 ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by power button\n");
233 acpi_event_power_button_wake(acpi_sc);
234 break;
235 case ACPI_SLEEP_BUTTON:
236 ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by sleep button\n");
237 acpi_event_sleep_button_wake(acpi_sc);
238 break;
239 default:
240 break; /* unknown button type */
241 }
242 }
243
244 static void
245 acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
246 {
247 struct acpi_button_softc *sc;
248
249 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
250
251 sc = (struct acpi_button_softc *)context;
252 switch (notify) {
253 case ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP:
254 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_button_notify_sleep, sc);
255 break;
256 case ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP:
257 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_button_notify_wakeup, sc);
258 break;
259 default:
260 device_printf(sc->button_dev, "unknown notify %#x\n", notify);
261 break;
262 }
263 }
264
265 static ACPI_STATUS
266 acpi_button_fixed_handler(void *context)
267 {
268 struct acpi_button_softc *sc = (struct acpi_button_softc *)context;
269
270 ACPI_FUNCTION_TRACE_PTR((char *)(uintptr_t)__func__, context);
271
272 if (context == NULL)
273 return_ACPI_STATUS (AE_BAD_PARAMETER);
274
275 acpi_button_notify_handler(sc->button_handle,
276 ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP, sc);
277 return_ACPI_STATUS (AE_OK);
278 }
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