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/10.2/sys/dev/acpica/acpi_lid.c 246128 2013-01-30 18:01:20Z sbz $");
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 DEVMETHOD_END
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_prw_data prw;
102 struct acpi_lid_softc *sc;
103
104 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
105
106 sc = device_get_softc(dev);
107 sc->lid_dev = dev;
108 sc->lid_handle = acpi_get_handle(dev);
109
110 /*
111 * If a system does not get lid events, it may make sense to change
112 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake and
113 * runtime notify in that case though.
114 */
115 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY,
116 acpi_lid_notify_handler, sc);
117
118 /* Enable the GPE for wake/runtime. */
119 acpi_wake_set_enable(dev, 1);
120 if (acpi_parse_prw(sc->lid_handle, &prw) == 0)
121 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
122
123 return (0);
124 }
125
126 static int
127 acpi_lid_suspend(device_t dev)
128 {
129 return (0);
130 }
131
132 static int
133 acpi_lid_resume(device_t dev)
134 {
135 return (0);
136 }
137
138 static void
139 acpi_lid_notify_status_changed(void *arg)
140 {
141 struct acpi_lid_softc *sc;
142 struct acpi_softc *acpi_sc;
143 ACPI_STATUS status;
144
145 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
146
147 sc = (struct acpi_lid_softc *)arg;
148 ACPI_SERIAL_BEGIN(lid);
149
150 /*
151 * Evaluate _LID and check the return value, update lid status.
152 * Zero: The lid is closed
153 * Non-zero: The lid is open
154 */
155 status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status);
156 if (ACPI_FAILURE(status))
157 goto out;
158
159 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
160 if (acpi_sc == NULL)
161 goto out;
162
163 ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n",
164 sc->lid_status ? "opened" : "closed");
165
166 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
167
168 if (sc->lid_status == 0)
169 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
170 else
171 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
172
173 out:
174 ACPI_SERIAL_END(lid);
175 return_VOID;
176 }
177
178 /* XXX maybe not here */
179 #define ACPI_NOTIFY_STATUS_CHANGED 0x80
180
181 static void
182 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
183 {
184 struct acpi_lid_softc *sc;
185
186 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
187
188 sc = (struct acpi_lid_softc *)context;
189 switch (notify) {
190 case ACPI_NOTIFY_STATUS_CHANGED:
191 AcpiOsExecute(OSL_NOTIFY_HANDLER,
192 acpi_lid_notify_status_changed, sc);
193 break;
194 default:
195 device_printf(sc->lid_dev, "unknown notify %#x\n", notify);
196 break;
197 }
198
199 return_VOID;
200 }
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