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: releng/8.1/sys/dev/acpica/acpi_lid.c 207250 2010-04-26 20:55:03Z jkim $");
32
33 #include "opt_acpi.h"
34 #include <sys/param.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 /* Hooks for the ACPI CA debugging infrastructure */
46 #define _COMPONENT ACPI_BUTTON
47 ACPI_MODULE_NAME("LID")
48
49 struct acpi_lid_softc {
50 device_t lid_dev;
51 ACPI_HANDLE lid_handle;
52 int lid_status; /* open or closed */
53 };
54
55 ACPI_SERIAL_DECL(lid, "ACPI lid");
56
57 static int acpi_lid_probe(device_t dev);
58 static int acpi_lid_attach(device_t dev);
59 static int acpi_lid_suspend(device_t dev);
60 static int acpi_lid_resume(device_t dev);
61 static void acpi_lid_notify_status_changed(void *arg);
62 static void acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify,
63 void *context);
64
65 static device_method_t acpi_lid_methods[] = {
66 /* Device interface */
67 DEVMETHOD(device_probe, acpi_lid_probe),
68 DEVMETHOD(device_attach, acpi_lid_attach),
69 DEVMETHOD(device_suspend, acpi_lid_suspend),
70 DEVMETHOD(device_resume, acpi_lid_resume),
71
72 {0, 0}
73 };
74
75 static driver_t acpi_lid_driver = {
76 "acpi_lid",
77 acpi_lid_methods,
78 sizeof(struct acpi_lid_softc),
79 };
80
81 static devclass_t acpi_lid_devclass;
82 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0);
83 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1);
84
85 static int
86 acpi_lid_probe(device_t dev)
87 {
88 static char *lid_ids[] = { "PNP0C0D", NULL };
89
90 if (acpi_disabled("lid") ||
91 ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids) == NULL)
92 return (ENXIO);
93
94 device_set_desc(dev, "Control Method Lid Switch");
95 return (0);
96 }
97
98 static int
99 acpi_lid_attach(device_t dev)
100 {
101 struct acpi_lid_softc *sc;
102
103 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
104
105 sc = device_get_softc(dev);
106 sc->lid_dev = dev;
107 sc->lid_handle = acpi_get_handle(dev);
108
109 /*
110 * If a system does not get lid events, it may make sense to change
111 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake and
112 * runtime notify in that case though.
113 */
114 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY,
115 acpi_lid_notify_handler, sc);
116
117 /* Enable the GPE for wake/runtime. */
118 acpi_wake_set_enable(dev, 1);
119
120 return (0);
121 }
122
123 static int
124 acpi_lid_suspend(device_t dev)
125 {
126 return (0);
127 }
128
129 static int
130 acpi_lid_resume(device_t dev)
131 {
132 return (0);
133 }
134
135 static void
136 acpi_lid_notify_status_changed(void *arg)
137 {
138 struct acpi_lid_softc *sc;
139 struct acpi_softc *acpi_sc;
140 ACPI_STATUS status;
141
142 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
143
144 sc = (struct acpi_lid_softc *)arg;
145 ACPI_SERIAL_BEGIN(lid);
146
147 /*
148 * Evaluate _LID and check the return value, update lid status.
149 * Zero: The lid is closed
150 * Non-zero: The lid is open
151 */
152 status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status);
153 if (ACPI_FAILURE(status))
154 goto out;
155
156 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
157 if (acpi_sc == NULL)
158 goto out;
159
160 ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n",
161 sc->lid_status ? "opened" : "closed");
162
163 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
164
165 if (sc->lid_status == 0)
166 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
167 else
168 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
169
170 out:
171 ACPI_SERIAL_END(lid);
172 return_VOID;
173 }
174
175 /* XXX maybe not here */
176 #define ACPI_NOTIFY_STATUS_CHANGED 0x80
177
178 static void
179 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
180 {
181 struct acpi_lid_softc *sc;
182
183 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
184
185 sc = (struct acpi_lid_softc *)context;
186 switch (notify) {
187 case ACPI_NOTIFY_STATUS_CHANGED:
188 AcpiOsExecute(OSL_NOTIFY_HANDLER,
189 acpi_lid_notify_status_changed, sc);
190 break;
191 default:
192 device_printf(sc->lid_dev, "unknown notify %#x\n", notify);
193 break;
194 }
195
196 return_VOID;
197 }
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