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