sys/dev/acpica/acpi_lid.c

   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  * $FreeBSD: src/sys/dev/acpica/acpi_lid.c,v 1.30 2009/06/05 18:44:36 jkim Exp $
  30  */
  31
  32 #include "opt_acpi.h"
  33 #include <sys/param.h>
  34 #include <sys/kernel.h>
  35 #include <sys/module.h>
  36 #include <sys/bus.h>
  37 #include <sys/proc.h>
  38
  39 #include "acpi.h"
  40 #include "accommon.h"
  41
  42 #include <dev/acpica/acpivar.h>
  43
  44 /* Hooks for the ACPICA debugging infrastructure */
  45 #define _COMPONENT      ACPI_BUTTON
  46 ACPI_MODULE_NAME("LID")
  47
  48 #define ACPI_NOTIFY_STATUS_CHANGED      0x80
  49
  50 struct acpi_lid_softc {
  51     device_t    lid_dev;
  52     ACPI_HANDLE lid_handle;
  53     int         lid_status;     /* open or closed */
  54 };
  55
  56 ACPI_SERIAL_DECL(lid, "ACPI lid");
  57
  58 static int      acpi_lid_probe(device_t dev);
  59 static int      acpi_lid_attach(device_t dev);
  60 static int      acpi_lid_suspend(device_t dev);
  61 static int      acpi_lid_resume(device_t dev);
  62 static void     acpi_lid_notify_status_changed(void *arg);
  63 static void     acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify,
  64                                         void *context);
  65
  66 static device_method_t acpi_lid_methods[] = {
  67     /* Device interface */
  68     DEVMETHOD(device_probe,     acpi_lid_probe),
  69     DEVMETHOD(device_attach,    acpi_lid_attach),
  70     DEVMETHOD(device_suspend,   acpi_lid_suspend),
  71     DEVMETHOD(device_resume,    acpi_lid_resume),
  72
  73     DEVMETHOD_END
  74 };
  75
  76 static driver_t acpi_lid_driver = {
  77     "acpi_lid",
  78     acpi_lid_methods,
  79     sizeof(struct acpi_lid_softc),
  80 };
  81
  82 static devclass_t acpi_lid_devclass;
  83 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, NULL, NULL);
  84 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1);
  85
  86 static int
  87 acpi_lid_probe(device_t dev)
  88 {
  89     static char *lid_ids[] = { "PNP0C0D", NULL };
  90
  91     ACPI_SERIAL_INIT(lid);
  92
  93     if (acpi_disabled("lid") ||
  94         ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids) == NULL)
  95         return (ENXIO);
  96
  97     device_set_desc(dev, "Control Method Lid Switch");
  98     return (0);
  99 }
 100
 101 static int
 102 acpi_lid_attach(device_t dev)
 103 {
 104     struct acpi_prw_data        prw;
 105     struct acpi_lid_softc       *sc;
 106
 107     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 108
 109     sc = device_get_softc(dev);
 110     sc->lid_dev = dev;
 111     sc->lid_handle = acpi_get_handle(dev);
 112
 113     ACPI_SERIAL_INIT(lid);
 114
 115     /*
 116      * If a system does not get lid events, it may make sense to change
 117      * the type to ACPI_ALL_NOTIFY.  Some systems generate both a wake and
 118      * runtime notify in that case though.
 119      */
 120     AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY,
 121                              acpi_lid_notify_handler, sc);
 122
 123     /* Enable the GPE for wake/runtime */
 124     acpi_wake_set_enable(dev, 1);
 125     if (acpi_parse_prw(sc->lid_handle, &prw) == 0)
 126         AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
 127
 128     return (0);
 129 }
 130
 131 static int
 132 acpi_lid_suspend(device_t dev)
 133 {
 134     return (0);
 135 }
 136
 137 static int
 138 acpi_lid_resume(device_t dev)
 139 {
 140     return (0);
 141 }
 142
 143 static void
 144 acpi_lid_notify_status_changed(void *arg)
 145 {
 146     struct acpi_lid_softc       *sc;
 147     struct acpi_softc           *acpi_sc;
 148     ACPI_STATUS                 status;
 149
 150     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 151
 152     sc = (struct acpi_lid_softc *)arg;
 153     ACPI_SERIAL_BEGIN(lid);
 154
 155     /*
 156      * Evaluate _LID and check the return value, update lid status.
 157      *  Zero:           The lid is closed
 158      *  Non-zero:       The lid is open
 159      */
 160     status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status);
 161     if (ACPI_FAILURE(status))
 162         goto out;
 163
 164     acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
 165     if (acpi_sc == NULL)
 166         goto out;
 167
 168     ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n",
 169                 sc->lid_status ? "opened" : "closed");
 170
 171     acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
 172
 173     if (sc->lid_status == 0)
 174         EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
 175     else
 176         EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
 177
 178 out:
 179     ACPI_SERIAL_END(lid);
 180     return_VOID;
 181 }
 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 }