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 __FBSDID("$FreeBSD$");
32
33 #include "opt_acpi.h"
34 #include "opt_evdev.h"
35 #include <sys/param.h>
36 #include <sys/eventhandler.h>
37 #include <sys/kernel.h>
38 #include <sys/module.h>
39 #include <sys/bus.h>
40 #include <sys/proc.h>
41
42 #include <contrib/dev/acpica/include/acpi.h>
43 #include <contrib/dev/acpica/include/accommon.h>
44
45 #include <dev/acpica/acpivar.h>
46
47 #ifdef EVDEV_SUPPORT
48 #include <dev/evdev/input.h>
49 #include <dev/evdev/evdev.h>
50 #endif
51
52 /* Hooks for the ACPI CA debugging infrastructure */
53 #define _COMPONENT ACPI_BUTTON
54 ACPI_MODULE_NAME("LID")
55
56 struct acpi_lid_softc {
57 device_t lid_dev;
58 ACPI_HANDLE lid_handle;
59 int lid_status; /* open or closed */
60 #ifdef EVDEV_SUPPORT
61 struct evdev_dev *lid_evdev;
62 #endif
63 };
64
65 ACPI_HANDLE acpi_lid_handle;
66
67 ACPI_SERIAL_DECL(lid, "ACPI lid");
68
69 static int acpi_lid_probe(device_t dev);
70 static int acpi_lid_attach(device_t dev);
71 static int acpi_lid_suspend(device_t dev);
72 static int acpi_lid_resume(device_t dev);
73 static void acpi_lid_notify_status_changed(void *arg);
74 static void acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify,
75 void *context);
76
77 static device_method_t acpi_lid_methods[] = {
78 /* Device interface */
79 DEVMETHOD(device_probe, acpi_lid_probe),
80 DEVMETHOD(device_attach, acpi_lid_attach),
81 DEVMETHOD(device_suspend, acpi_lid_suspend),
82 DEVMETHOD(device_resume, acpi_lid_resume),
83
84 DEVMETHOD_END
85 };
86
87 static driver_t acpi_lid_driver = {
88 "acpi_lid",
89 acpi_lid_methods,
90 sizeof(struct acpi_lid_softc),
91 };
92
93 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, 0, 0);
94 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1);
95
96 static void
97 acpi_lid_status_update(struct acpi_lid_softc *sc)
98 {
99 ACPI_STATUS status;
100 int lid_status;
101
102 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
103
104 /*
105 * Evaluate _LID and check the return value, update lid status.
106 * Zero: The lid is closed
107 * Non-zero: The lid is open
108 */
109 status = acpi_GetInteger(sc->lid_handle, "_LID", &lid_status);
110 if (ACPI_FAILURE(status))
111 lid_status = 1; /* assume lid is opened */
112
113 /* range check value */
114 sc->lid_status = lid_status ? 1 : 0;
115
116 /* Send notification via devd */
117 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
118
119 #ifdef EVDEV_SUPPORT
120 /* Notify evdev about lid status */
121 evdev_push_sw(sc->lid_evdev, SW_LID, lid_status ? 0 : 1);
122 evdev_sync(sc->lid_evdev);
123 #endif
124 }
125
126 static int
127 acpi_lid_probe(device_t dev)
128 {
129 static char *lid_ids[] = { "PNP0C0D", NULL };
130 int rv;
131
132 if (acpi_disabled("lid"))
133 return (ENXIO);
134 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids, NULL);
135 if (rv <= 0)
136 device_set_desc(dev, "Control Method Lid Switch");
137 return (rv);
138 }
139
140 static int
141 acpi_lid_attach(device_t dev)
142 {
143 struct acpi_prw_data prw;
144 struct acpi_lid_softc *sc;
145
146 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
147
148 sc = device_get_softc(dev);
149 sc->lid_dev = dev;
150 acpi_lid_handle = sc->lid_handle = acpi_get_handle(dev);
151
152 #ifdef EVDEV_SUPPORT
153 /* Register evdev device before initial status update */
154 sc->lid_evdev = evdev_alloc();
155 evdev_set_name(sc->lid_evdev, device_get_desc(dev));
156 evdev_set_phys(sc->lid_evdev, device_get_nameunit(dev));
157 evdev_set_id(sc->lid_evdev, BUS_HOST, 0, 0, 1);
158 evdev_support_event(sc->lid_evdev, EV_SYN);
159 evdev_support_event(sc->lid_evdev, EV_SW);
160 evdev_support_sw(sc->lid_evdev, SW_LID);
161
162 if (evdev_register(sc->lid_evdev))
163 return (ENXIO);
164 #endif
165
166 /*
167 * If a system does not get lid events, it may make sense to change
168 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake and
169 * runtime notify in that case though.
170 */
171 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY,
172 acpi_lid_notify_handler, sc);
173
174 /* Enable the GPE for wake/runtime. */
175 acpi_wake_set_enable(dev, 1);
176 if (acpi_parse_prw(sc->lid_handle, &prw) == 0)
177 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
178
179 /* Get the initial lid status */
180 acpi_lid_status_update(sc);
181
182 /*
183 * Export the lid status
184 */
185 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
186 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
187 "state", CTLFLAG_RD, &sc->lid_status, 0,
188 "Device state (0 = closed, 1 = open)");
189
190 return (0);
191 }
192
193 static int
194 acpi_lid_suspend(device_t dev)
195 {
196 return (0);
197 }
198
199 static int
200 acpi_lid_resume(device_t dev)
201 {
202 struct acpi_lid_softc *sc;
203
204 sc = device_get_softc(dev);
205
206 /* Update lid status, if any */
207 acpi_lid_status_update(sc);
208
209 return (0);
210 }
211
212 static void
213 acpi_lid_notify_status_changed(void *arg)
214 {
215 struct acpi_lid_softc *sc;
216 struct acpi_softc *acpi_sc;
217
218 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
219
220 sc = (struct acpi_lid_softc *)arg;
221 ACPI_SERIAL_BEGIN(lid);
222
223 /* Update lid status, if any */
224 acpi_lid_status_update(sc);
225
226 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
227 if (acpi_sc == NULL)
228 goto out;
229
230 ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n",
231 sc->lid_status ? "opened" : "closed");
232
233 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
234
235 if (sc->lid_status == 0)
236 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
237 else
238 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
239
240 out:
241 ACPI_SERIAL_END(lid);
242 return_VOID;
243 }
244
245 /* XXX maybe not here */
246 #define ACPI_NOTIFY_STATUS_CHANGED 0x80
247
248 static void
249 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
250 {
251 struct acpi_lid_softc *sc;
252
253 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
254
255 sc = (struct acpi_lid_softc *)context;
256 switch (notify) {
257 case ACPI_NOTIFY_STATUS_CHANGED:
258 AcpiOsExecute(OSL_NOTIFY_HANDLER,
259 acpi_lid_notify_status_changed, sc);
260 break;
261 default:
262 device_printf(sc->lid_dev, "unknown notify %#x\n", notify);
263 break;
264 }
265
266 return_VOID;
267 }
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