The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/acpi_lid.c

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    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/6.0/sys/dev/acpica/acpi_lid.c 134305 2004-08-25 20:09:15Z njl $");
   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 "acpi.h"
   41 #include <dev/acpica/acpivar.h>
   42 
   43 /* Hooks for the ACPI CA debugging infrastructure */
   44 #define _COMPONENT      ACPI_BUTTON
   45 ACPI_MODULE_NAME("LID")
   46 
   47 struct acpi_lid_softc {
   48     device_t    lid_dev;
   49     ACPI_HANDLE lid_handle;
   50     int         lid_status;     /* open or closed */
   51 };
   52 
   53 ACPI_SERIAL_DECL(lid, "ACPI lid");
   54 
   55 static int      acpi_lid_probe(device_t dev);
   56 static int      acpi_lid_attach(device_t dev);
   57 static int      acpi_lid_suspend(device_t dev);
   58 static int      acpi_lid_resume(device_t dev);
   59 static void     acpi_lid_notify_status_changed(void *arg);
   60 static void     acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify,
   61                                         void *context);
   62 
   63 static device_method_t acpi_lid_methods[] = {
   64     /* Device interface */
   65     DEVMETHOD(device_probe,     acpi_lid_probe),
   66     DEVMETHOD(device_attach,    acpi_lid_attach),
   67     DEVMETHOD(device_suspend,   acpi_lid_suspend),
   68     DEVMETHOD(device_resume,    acpi_lid_resume),
   69 
   70     {0, 0}
   71 };
   72 
   73 static driver_t acpi_lid_driver = {
   74     "acpi_lid",
   75     acpi_lid_methods,
   76     sizeof(struct acpi_lid_softc),
   77 };
   78 
   79 static devclass_t acpi_lid_devclass;
   80 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0);
   81 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1);
   82 
   83 static int
   84 acpi_lid_probe(device_t dev)
   85 {
   86     static char *lid_ids[] = { "PNP0C0D", NULL };
   87 
   88     if (acpi_disabled("lid") ||
   89         ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids) == NULL)
   90         return (ENXIO);
   91 
   92     device_set_desc(dev, "Control Method Lid Switch");
   93     return (0);
   94 }
   95 
   96 static int
   97 acpi_lid_attach(device_t dev)
   98 {
   99     struct acpi_lid_softc       *sc;
  100 
  101     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  102 
  103     sc = device_get_softc(dev);
  104     sc->lid_dev = dev;
  105     sc->lid_handle = acpi_get_handle(dev);
  106 
  107     /*
  108      * If a system does not get lid events, it may make sense to change
  109      * the type to ACPI_ALL_NOTIFY.  Some systems generate both a wake and
  110      * runtime notify in that case though.
  111      */
  112     AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY,
  113                              acpi_lid_notify_handler, sc);
  114 
  115     /* Enable the GPE for wake/runtime. */
  116     acpi_wake_init(dev, ACPI_GPE_TYPE_WAKE_RUN);
  117     acpi_wake_set_enable(dev, 1);
  118 
  119     return (0);
  120 }
  121 
  122 static int
  123 acpi_lid_suspend(device_t dev)
  124 {
  125     return (0);
  126 }
  127 
  128 static int
  129 acpi_lid_resume(device_t dev)
  130 {
  131     return (0);
  132 }
  133 
  134 static void
  135 acpi_lid_notify_status_changed(void *arg)
  136 {
  137     struct acpi_lid_softc       *sc;
  138     struct acpi_softc           *acpi_sc;
  139     ACPI_STATUS                 status;
  140 
  141     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  142 
  143     sc = (struct acpi_lid_softc *)arg;
  144     ACPI_SERIAL_BEGIN(lid);
  145 
  146     /*
  147      * Evaluate _LID and check the return value, update lid status.
  148      *  Zero:           The lid is closed
  149      *  Non-zero:       The lid is open
  150      */
  151     status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status);
  152     if (ACPI_FAILURE(status))
  153         goto out;
  154 
  155     acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
  156     if (acpi_sc == NULL)
  157         goto out;
  158 
  159     ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n",
  160                 sc->lid_status ? "opened" : "closed");
  161 
  162     acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
  163 
  164     if (sc->lid_status == 0)
  165         EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
  166     else
  167         EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
  168 
  169 out:
  170     ACPI_SERIAL_END(lid);
  171     return_VOID;
  172 }
  173 
  174 /* XXX maybe not here */
  175 #define ACPI_NOTIFY_STATUS_CHANGED      0x80
  176 
  177 static void 
  178 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
  179 {
  180     struct acpi_lid_softc       *sc;
  181 
  182     ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
  183 
  184     sc = (struct acpi_lid_softc *)context;
  185     switch (notify) {
  186     case ACPI_NOTIFY_STATUS_CHANGED:
  187         AcpiOsQueueForExecution(OSD_PRIORITY_LO,
  188                                 acpi_lid_notify_status_changed, sc);
  189         break;
  190     default:
  191         device_printf(sc->lid_dev, "unknown notify %#x\n", notify);
  192         break;
  193     }
  194 
  195     return_VOID;
  196 }

Cache object: 1280dd0773b9491bbd7be0a26869eeb8


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