1 /*-
2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org>
3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
4 * Copyright (c) 2000 Michael Smith <msmith@freebd.org>
5 * Copyright (c) 2000 BSDi
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 #include "opt_acpi.h"
32 #include "opt_evdev.h"
33 #include <sys/param.h>
34 #include <sys/eventhandler.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
37 #include <sys/bus.h>
38 #include <sys/proc.h>
39
40 #include <contrib/dev/acpica/include/acpi.h>
41 #include <contrib/dev/acpica/include/accommon.h>
42
43 #include <dev/acpica/acpivar.h>
44
45 #ifdef EVDEV_SUPPORT
46 #include <dev/evdev/input.h>
47 #include <dev/evdev/evdev.h>
48 #endif
49
50 /* Hooks for the ACPI CA debugging infrastructure */
51 #define _COMPONENT ACPI_BUTTON
52 ACPI_MODULE_NAME("LID")
53
54 struct acpi_lid_softc {
55 device_t lid_dev;
56 ACPI_HANDLE lid_handle;
57 int lid_status; /* open or closed */
58 #ifdef EVDEV_SUPPORT
59 struct evdev_dev *lid_evdev;
60 #endif
61 };
62
63 ACPI_HANDLE acpi_lid_handle;
64
65 ACPI_SERIAL_DECL(lid, "ACPI lid");
66
67 static int acpi_lid_probe(device_t dev);
68 static int acpi_lid_attach(device_t dev);
69 static int acpi_lid_suspend(device_t dev);
70 static int acpi_lid_resume(device_t dev);
71 static void acpi_lid_notify_status_changed(void *arg);
72 static void acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify,
73 void *context);
74
75 static device_method_t acpi_lid_methods[] = {
76 /* Device interface */
77 DEVMETHOD(device_probe, acpi_lid_probe),
78 DEVMETHOD(device_attach, acpi_lid_attach),
79 DEVMETHOD(device_suspend, acpi_lid_suspend),
80 DEVMETHOD(device_resume, acpi_lid_resume),
81
82 DEVMETHOD_END
83 };
84
85 static driver_t acpi_lid_driver = {
86 "acpi_lid",
87 acpi_lid_methods,
88 sizeof(struct acpi_lid_softc),
89 };
90
91 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, 0, 0);
92 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1);
93
94 static int
acpi_lid_status_update(struct acpi_lid_softc * sc)95 acpi_lid_status_update(struct acpi_lid_softc *sc)
96 {
97 ACPI_STATUS status;
98 int lid_status;
99
100 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
101
102 /*
103 * Evaluate _LID and check the return value, update lid status.
104 * Zero: The lid is closed
105 * Non-zero: The lid is open
106 */
107 status = acpi_GetInteger(sc->lid_handle, "_LID", &lid_status);
108 if (ACPI_FAILURE(status))
109 lid_status = 1; /* assume lid is opened */
110 else
111 lid_status = (lid_status != 0); /* range check value */
112
113 if (sc->lid_status == lid_status)
114 return (EALREADY);
115 sc->lid_status = lid_status;
116
117 /* Send notification via devd */
118 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
119
120 #ifdef EVDEV_SUPPORT
121 /* Notify evdev about lid status */
122 evdev_push_sw(sc->lid_evdev, SW_LID, lid_status ? 0 : 1);
123 evdev_sync(sc->lid_evdev);
124 #endif
125 return (0);
126 }
127
128 static int
acpi_lid_probe(device_t dev)129 acpi_lid_probe(device_t dev)
130 {
131 static char *lid_ids[] = { "PNP0C0D", NULL };
132 int rv;
133
134 if (acpi_disabled("lid"))
135 return (ENXIO);
136 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids, NULL);
137 if (rv <= 0)
138 device_set_desc(dev, "Control Method Lid Switch");
139 return (rv);
140 }
141
142 static int
acpi_lid_attach(device_t dev)143 acpi_lid_attach(device_t dev)
144 {
145 struct acpi_prw_data prw;
146 struct acpi_lid_softc *sc;
147
148 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
149
150 sc = device_get_softc(dev);
151 sc->lid_dev = dev;
152 acpi_lid_handle = sc->lid_handle = acpi_get_handle(dev);
153 sc->lid_status = -1;
154
155 #ifdef EVDEV_SUPPORT
156 /* Register evdev device before initial status update */
157 sc->lid_evdev = evdev_alloc();
158 evdev_set_name(sc->lid_evdev, device_get_desc(dev));
159 evdev_set_phys(sc->lid_evdev, device_get_nameunit(dev));
160 evdev_set_id(sc->lid_evdev, BUS_HOST, 0, 0, 1);
161 evdev_support_event(sc->lid_evdev, EV_SYN);
162 evdev_support_event(sc->lid_evdev, EV_SW);
163 evdev_support_sw(sc->lid_evdev, SW_LID);
164
165 if (evdev_register(sc->lid_evdev))
166 return (ENXIO);
167 #endif
168
169 /*
170 * If a system does not get lid events, it may make sense to change
171 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake and
172 * runtime notify in that case though.
173 */
174 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY,
175 acpi_lid_notify_handler, sc);
176
177 /* Enable the GPE for wake/runtime. */
178 acpi_wake_set_enable(dev, 1);
179 if (acpi_parse_prw(sc->lid_handle, &prw) == 0)
180 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
181
182 /* Get the initial lid status */
183 acpi_lid_status_update(sc);
184
185 /*
186 * Export the lid status
187 */
188 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
189 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
190 "state", CTLFLAG_RD, &sc->lid_status, 0,
191 "Device state (0 = closed, 1 = open)");
192
193 return (0);
194 }
195
196 static int
acpi_lid_suspend(device_t dev)197 acpi_lid_suspend(device_t dev)
198 {
199 return (0);
200 }
201
202 static int
acpi_lid_resume(device_t dev)203 acpi_lid_resume(device_t dev)
204 {
205 struct acpi_lid_softc *sc;
206
207 sc = device_get_softc(dev);
208
209 /* Update lid status, if any */
210 acpi_lid_status_update(sc);
211
212 return (0);
213 }
214
215 static void
acpi_lid_notify_status_changed(void * arg)216 acpi_lid_notify_status_changed(void *arg)
217 {
218 struct acpi_lid_softc *sc;
219 struct acpi_softc *acpi_sc;
220
221 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
222
223 sc = (struct acpi_lid_softc *)arg;
224 ACPI_SERIAL_BEGIN(lid);
225
226 /* Update lid status, if any */
227 if (acpi_lid_status_update(sc) != 0)
228 goto out;
229
230 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
231 if (acpi_sc == NULL)
232 goto out;
233
234 ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n",
235 sc->lid_status ? "opened" : "closed");
236
237 if (sc->lid_status == 0)
238 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
239 else
240 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
241
242 out:
243 ACPI_SERIAL_END(lid);
244 return_VOID;
245 }
246
247 /* XXX maybe not here */
248 #define ACPI_NOTIFY_STATUS_CHANGED 0x80
249
250 static void
acpi_lid_notify_handler(ACPI_HANDLE h,UINT32 notify,void * context)251 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
252 {
253 struct acpi_lid_softc *sc;
254
255 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
256
257 sc = (struct acpi_lid_softc *)context;
258 switch (notify) {
259 case ACPI_NOTIFY_STATUS_CHANGED:
260 AcpiOsExecute(OSL_NOTIFY_HANDLER,
261 acpi_lid_notify_status_changed, sc);
262 break;
263 default:
264 device_printf(sc->lid_dev, "unknown notify %#x\n", notify);
265 break;
266 }
267
268 return_VOID;
269 }
270