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  * $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 ACPI CA debugging infrastructure */
   45 #define _COMPONENT      ACPI_BUTTON
   46 ACPI_MODULE_NAME("LID")
   47 
   48 struct acpi_lid_softc {
   49     device_t    lid_dev;
   50     ACPI_HANDLE lid_handle;
   51     int         lid_status;     /* open or closed */
   52 };
   53 
   54 ACPI_SERIAL_DECL(lid, "ACPI lid");
   55 
   56 static int      acpi_lid_probe(device_t dev);
   57 static int      acpi_lid_attach(device_t dev);
   58 static int      acpi_lid_suspend(device_t dev);
   59 static int      acpi_lid_resume(device_t dev);
   60 static void     acpi_lid_notify_status_changed(void *arg);
   61 static void     acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify,
   62                                         void *context);
   63 
   64 static device_method_t acpi_lid_methods[] = {
   65     /* Device interface */
   66     DEVMETHOD(device_probe,     acpi_lid_probe),
   67     DEVMETHOD(device_attach,    acpi_lid_attach),
   68     DEVMETHOD(device_suspend,   acpi_lid_suspend),
   69     DEVMETHOD(device_resume,    acpi_lid_resume),
   70 
   71     DEVMETHOD_END
   72 };
   73 
   74 static driver_t acpi_lid_driver = {
   75     "acpi_lid",
   76     acpi_lid_methods,
   77     sizeof(struct acpi_lid_softc),
   78 };
   79 
   80 static devclass_t acpi_lid_devclass;
   81 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, NULL, NULL);
   82 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1);
   83 
   84 static int
   85 acpi_lid_probe(device_t dev)
   86 {
   87     static char *lid_ids[] = { "PNP0C0D", NULL };
   88 
   89     ACPI_SERIAL_INIT(lid);
   90 
   91     if (acpi_disabled("lid") ||
   92         ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids) == NULL)
   93         return (ENXIO);
   94 
   95     device_set_desc(dev, "Control Method Lid Switch");
   96     return (0);
   97 }
   98 
   99 static int
  100 acpi_lid_attach(device_t dev)
  101 {
  102     struct acpi_prw_data        prw;
  103     struct acpi_lid_softc       *sc;
  104 
  105     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  106 
  107     sc = device_get_softc(dev);
  108     sc->lid_dev = dev;
  109     sc->lid_handle = acpi_get_handle(dev);
  110 
  111     ACPI_SERIAL_INIT(lid);
  112 
  113     /*
  114      * If a system does not get lid events, it may make sense to change
  115      * the type to ACPI_ALL_NOTIFY.  Some systems generate both a wake and
  116      * runtime notify in that case though.
  117      */
  118     AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY,
  119                              acpi_lid_notify_handler, sc);
  120 
  121     /* Enable the GPE for wake/runtime */
  122     acpi_wake_set_enable(dev, 1);
  123     if (acpi_parse_prw(sc->lid_handle, &prw) == 0)
  124         AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
  125 
  126     return (0);
  127 }
  128 
  129 static int
  130 acpi_lid_suspend(device_t dev)
  131 {
  132     return (0);
  133 }
  134 
  135 static int
  136 acpi_lid_resume(device_t dev)
  137 {
  138     return (0);
  139 }
  140 
  141 static void
  142 acpi_lid_notify_status_changed(void *arg)
  143 {
  144     struct acpi_lid_softc       *sc;
  145     struct acpi_softc           *acpi_sc;
  146     ACPI_STATUS                 status;
  147 
  148     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  149 
  150     sc = (struct acpi_lid_softc *)arg;
  151     ACPI_SERIAL_BEGIN(lid);
  152 
  153     /*
  154      * Evaluate _LID and check the return value, update lid status.
  155      *  Zero:           The lid is closed
  156      *  Non-zero:       The lid is open
  157      */
  158     status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status);
  159     if (ACPI_FAILURE(status))
  160         goto out;
  161 
  162     acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
  163     if (acpi_sc == NULL)
  164         goto out;
  165 
  166     ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n",
  167                 sc->lid_status ? "opened" : "closed");
  168 
  169     acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
  170 
  171     if (sc->lid_status == 0)
  172         EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
  173     else
  174         EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
  175 
  176 out:
  177     ACPI_SERIAL_END(lid);
  178     return_VOID;
  179 }
  180 
  181 /* XXX maybe not here */
  182 #define ACPI_NOTIFY_STATUS_CHANGED      0x80
  183 
  184 static void 
  185 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
  186 {
  187     struct acpi_lid_softc       *sc;
  188 
  189     ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
  190 
  191     sc = (struct acpi_lid_softc *)context;
  192     switch (notify) {
  193     case ACPI_NOTIFY_STATUS_CHANGED:
  194         AcpiOsExecute(OSL_NOTIFY_HANDLER,
  195                       acpi_lid_notify_status_changed, sc);
  196         break;
  197     default:
  198         device_printf(sc->lid_dev, "unknown notify %#x\n", notify);
  199         break;
  200     }
  201 
  202     return_VOID;
  203 }

Cache object: 571c36b285c0434da7d79ceb94061c01


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