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("$FreeBSD$");
31
32 #include "opt_acpi.h"
33 #include "opt_evdev.h"
34 #include <sys/param.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
37 #include <sys/bus.h>
38
39 #include <contrib/dev/acpica/include/acpi.h>
40 #include <contrib/dev/acpica/include/accommon.h>
41
42 #include <dev/acpica/acpivar.h>
43
44 #ifdef EVDEV_SUPPORT
45 #include <dev/evdev/input.h>
46 #include <dev/evdev/evdev.h>
47 #endif
48
49 /* Hooks for the ACPI CA debugging infrastructure */
50 #define _COMPONENT ACPI_BUTTON
51 ACPI_MODULE_NAME("BUTTON")
52
53 struct acpi_button_softc {
54 device_t button_dev;
55 ACPI_HANDLE button_handle;
56 boolean_t button_type;
57 #define ACPI_POWER_BUTTON 0
58 #define ACPI_SLEEP_BUTTON 1
59 boolean_t fixed;
60 #ifdef EVDEV_SUPPORT
61 struct evdev_dev *button_evdev;
62 #endif
63 };
64
65 #define ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP 0x80
66 #define ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP 0x02
67
68 static int acpi_button_probe(device_t dev);
69 static int acpi_button_attach(device_t dev);
70 static int acpi_button_suspend(device_t dev);
71 static int acpi_button_resume(device_t dev);
72 static void acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify,
73 void *context);
74 static ACPI_STATUS
75 acpi_button_fixed_handler(void *context);
76 static void acpi_button_notify_sleep(void *arg);
77 static void acpi_button_notify_wakeup(void *arg);
78
79 static char *btn_ids[] = {
80 "PNP0C0C", "ACPI_FPB", "PNP0C0E", "ACPI_FSB",
81 NULL
82 };
83
84 static device_method_t acpi_button_methods[] = {
85 /* Device interface */
86 DEVMETHOD(device_probe, acpi_button_probe),
87 DEVMETHOD(device_attach, acpi_button_attach),
88 DEVMETHOD(device_suspend, acpi_button_suspend),
89 DEVMETHOD(device_shutdown, acpi_button_suspend),
90 DEVMETHOD(device_resume, acpi_button_resume),
91 DEVMETHOD_END
92 };
93
94 static driver_t acpi_button_driver = {
95 "acpi_button",
96 acpi_button_methods,
97 sizeof(struct acpi_button_softc),
98 };
99
100 static devclass_t acpi_button_devclass;
101 DRIVER_MODULE(acpi_button, acpi, acpi_button_driver, acpi_button_devclass,
102 0, 0);
103 MODULE_DEPEND(acpi_button, acpi, 1, 1, 1);
104
105 static int
106 acpi_button_probe(device_t dev)
107 {
108 struct acpi_button_softc *sc;
109 char *str;
110
111 if (acpi_disabled("button") ||
112 (str = ACPI_ID_PROBE(device_get_parent(dev), dev, btn_ids)) == NULL)
113 return (ENXIO);
114
115 sc = device_get_softc(dev);
116 if (strcmp(str, "PNP0C0C") == 0) {
117 device_set_desc(dev, "Power Button");
118 sc->button_type = ACPI_POWER_BUTTON;
119 } else if (strcmp(str, "ACPI_FPB") == 0) {
120 device_set_desc(dev, "Power Button (fixed)");
121 sc->button_type = ACPI_POWER_BUTTON;
122 sc->fixed = 1;
123 } else if (strcmp(str, "PNP0C0E") == 0) {
124 device_set_desc(dev, "Sleep Button");
125 sc->button_type = ACPI_SLEEP_BUTTON;
126 } else if (strcmp(str, "ACPI_FSB") == 0) {
127 device_set_desc(dev, "Sleep Button (fixed)");
128 sc->button_type = ACPI_SLEEP_BUTTON;
129 sc->fixed = 1;
130 }
131
132 return (0);
133 }
134
135 static int
136 acpi_button_attach(device_t dev)
137 {
138 struct acpi_prw_data prw;
139 struct acpi_button_softc *sc;
140 ACPI_STATUS status;
141 int event;
142
143 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
144
145 sc = device_get_softc(dev);
146 sc->button_dev = dev;
147 sc->button_handle = acpi_get_handle(dev);
148 event = (sc->button_type == ACPI_SLEEP_BUTTON) ?
149 ACPI_EVENT_SLEEP_BUTTON : ACPI_EVENT_POWER_BUTTON;
150
151 #ifdef EVDEV_SUPPORT
152 sc->button_evdev = evdev_alloc();
153 evdev_set_name(sc->button_evdev, device_get_desc(dev));
154 evdev_set_phys(sc->button_evdev, device_get_nameunit(dev));
155 evdev_set_id(sc->button_evdev, BUS_HOST, 0, 0, 1);
156 evdev_support_event(sc->button_evdev, EV_SYN);
157 evdev_support_event(sc->button_evdev, EV_KEY);
158 evdev_support_key(sc->button_evdev,
159 (sc->button_type == ACPI_SLEEP_BUTTON) ? KEY_SLEEP : KEY_POWER);
160
161 if (evdev_register(sc->button_evdev))
162 return (ENXIO);
163 #endif
164
165 /*
166 * Install the new handler. We could remove any fixed handlers added
167 * from the FADT once we have a duplicate from the AML but some systems
168 * only return events on one or the other so we have to keep both.
169 */
170 if (sc->fixed) {
171 AcpiClearEvent(event);
172 status = AcpiInstallFixedEventHandler(event,
173 acpi_button_fixed_handler, sc);
174 } else {
175 /*
176 * If a system does not get lid events, it may make sense to change
177 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake
178 * and runtime notify in that case though.
179 */
180 status = AcpiInstallNotifyHandler(sc->button_handle,
181 ACPI_DEVICE_NOTIFY, acpi_button_notify_handler, sc);
182 }
183 if (ACPI_FAILURE(status)) {
184 device_printf(sc->button_dev, "couldn't install notify handler - %s\n",
185 AcpiFormatException(status));
186 return_VALUE (ENXIO);
187 }
188
189 /* Enable the GPE for wake/runtime. */
190 acpi_wake_set_enable(dev, 1);
191 if (acpi_parse_prw(sc->button_handle, &prw) == 0)
192 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
193
194 return_VALUE (0);
195 }
196
197 static int
198 acpi_button_suspend(device_t dev)
199 {
200 return (0);
201 }
202
203 static int
204 acpi_button_resume(device_t dev)
205 {
206 return (0);
207 }
208
209 static void
210 acpi_button_notify_sleep(void *arg)
211 {
212 struct acpi_button_softc *sc;
213 struct acpi_softc *acpi_sc;
214
215 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
216
217 sc = (struct acpi_button_softc *)arg;
218 acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
219 if (acpi_sc == NULL)
220 return_VOID;
221
222 acpi_UserNotify("Button", sc->button_handle, sc->button_type);
223
224 switch (sc->button_type) {
225 case ACPI_POWER_BUTTON:
226 ACPI_VPRINT(sc->button_dev, acpi_sc, "power button pressed\n");
227 acpi_event_power_button_sleep(acpi_sc);
228 break;
229 case ACPI_SLEEP_BUTTON:
230 ACPI_VPRINT(sc->button_dev, acpi_sc, "sleep button pressed\n");
231 acpi_event_sleep_button_sleep(acpi_sc);
232 break;
233 default:
234 break; /* unknown button type */
235 }
236 }
237
238 static void
239 acpi_button_notify_wakeup(void *arg)
240 {
241 struct acpi_button_softc *sc;
242 struct acpi_softc *acpi_sc;
243
244 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
245
246 sc = (struct acpi_button_softc *)arg;
247 acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
248 if (acpi_sc == NULL)
249 return_VOID;
250
251 acpi_UserNotify("Button", sc->button_handle, sc->button_type);
252
253 switch (sc->button_type) {
254 case ACPI_POWER_BUTTON:
255 ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by power button\n");
256 acpi_event_power_button_wake(acpi_sc);
257 break;
258 case ACPI_SLEEP_BUTTON:
259 ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by sleep button\n");
260 acpi_event_sleep_button_wake(acpi_sc);
261 break;
262 default:
263 break; /* unknown button type */
264 }
265 }
266
267 static void
268 acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
269 {
270 struct acpi_button_softc *sc;
271 #ifdef EVDEV_SUPPORT
272 uint16_t key;
273 #endif
274
275 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
276
277 sc = (struct acpi_button_softc *)context;
278 switch (notify) {
279 case ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP:
280 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_button_notify_sleep, sc);
281 break;
282 case ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP:
283 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_button_notify_wakeup, sc);
284 break;
285 default:
286 device_printf(sc->button_dev, "unknown notify %#x\n", notify);
287 break;
288 }
289
290 #ifdef EVDEV_SUPPORT
291 key = (sc->button_type == ACPI_SLEEP_BUTTON) ? KEY_SLEEP : KEY_POWER;
292 evdev_push_key(sc->button_evdev, key, 1);
293 evdev_sync(sc->button_evdev);
294 evdev_push_key(sc->button_evdev, key, 0);
295 evdev_sync(sc->button_evdev);
296 #endif
297 }
298
299 static ACPI_STATUS
300 acpi_button_fixed_handler(void *context)
301 {
302 struct acpi_button_softc *sc = (struct acpi_button_softc *)context;
303
304 ACPI_FUNCTION_TRACE_PTR((char *)(uintptr_t)__func__, context);
305
306 if (context == NULL)
307 return_ACPI_STATUS (AE_BAD_PARAMETER);
308
309 acpi_button_notify_handler(sc->button_handle,
310 ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP, sc);
311 return_ACPI_STATUS (AE_OK);
312 }
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