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/11.1/sys/dev/acpica/acpi_lid.c 301418 2016-06-05 02:02:51Z adrian $");
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_HANDLE acpi_lid_handle;
56
57 ACPI_SERIAL_DECL(lid, "ACPI lid");
58
59 static int acpi_lid_probe(device_t dev);
60 static int acpi_lid_attach(device_t dev);
61 static int acpi_lid_suspend(device_t dev);
62 static int acpi_lid_resume(device_t dev);
63 static void acpi_lid_notify_status_changed(void *arg);
64 static void acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify,
65 void *context);
66
67 static device_method_t acpi_lid_methods[] = {
68 /* Device interface */
69 DEVMETHOD(device_probe, acpi_lid_probe),
70 DEVMETHOD(device_attach, acpi_lid_attach),
71 DEVMETHOD(device_suspend, acpi_lid_suspend),
72 DEVMETHOD(device_resume, acpi_lid_resume),
73
74 DEVMETHOD_END
75 };
76
77 static driver_t acpi_lid_driver = {
78 "acpi_lid",
79 acpi_lid_methods,
80 sizeof(struct acpi_lid_softc),
81 };
82
83 static devclass_t acpi_lid_devclass;
84 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0);
85 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1);
86
87 static int
88 acpi_lid_probe(device_t dev)
89 {
90 static char *lid_ids[] = { "PNP0C0D", NULL };
91
92 if (acpi_disabled("lid") ||
93 ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids) == NULL)
94 return (ENXIO);
95
96 device_set_desc(dev, "Control Method Lid Switch");
97 return (0);
98 }
99
100 static int
101 acpi_lid_attach(device_t dev)
102 {
103 struct acpi_prw_data prw;
104 struct acpi_lid_softc *sc;
105
106 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
107
108 sc = device_get_softc(dev);
109 sc->lid_dev = dev;
110 acpi_lid_handle = sc->lid_handle = acpi_get_handle(dev);
111
112 /*
113 * If a system does not get lid events, it may make sense to change
114 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake and
115 * runtime notify in that case though.
116 */
117 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY,
118 acpi_lid_notify_handler, sc);
119
120 /* Enable the GPE for wake/runtime. */
121 acpi_wake_set_enable(dev, 1);
122 if (acpi_parse_prw(sc->lid_handle, &prw) == 0)
123 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
124
125 return (0);
126 }
127
128 static int
129 acpi_lid_suspend(device_t dev)
130 {
131 return (0);
132 }
133
134 static int
135 acpi_lid_resume(device_t dev)
136 {
137 return (0);
138 }
139
140 static void
141 acpi_lid_notify_status_changed(void *arg)
142 {
143 struct acpi_lid_softc *sc;
144 struct acpi_softc *acpi_sc;
145 ACPI_STATUS status;
146
147 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
148
149 sc = (struct acpi_lid_softc *)arg;
150 ACPI_SERIAL_BEGIN(lid);
151
152 /*
153 * Evaluate _LID and check the return value, update lid status.
154 * Zero: The lid is closed
155 * Non-zero: The lid is open
156 */
157 status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status);
158 if (ACPI_FAILURE(status))
159 goto out;
160
161 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
162 if (acpi_sc == NULL)
163 goto out;
164
165 ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n",
166 sc->lid_status ? "opened" : "closed");
167
168 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
169
170 if (sc->lid_status == 0)
171 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
172 else
173 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
174
175 out:
176 ACPI_SERIAL_END(lid);
177 return_VOID;
178 }
179
180 /* XXX maybe not here */
181 #define ACPI_NOTIFY_STATUS_CHANGED 0x80
182
183 static void
184 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
185 {
186 struct acpi_lid_softc *sc;
187
188 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
189
190 sc = (struct acpi_lid_softc *)context;
191 switch (notify) {
192 case ACPI_NOTIFY_STATUS_CHANGED:
193 AcpiOsExecute(OSL_NOTIFY_HANDLER,
194 acpi_lid_notify_status_changed, sc);
195 break;
196 default:
197 device_printf(sc->lid_dev, "unknown notify %#x\n", notify);
198 break;
199 }
200
201 return_VOID;
202 }
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