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/9.0/sys/dev/acpica/acpi_lid.c 209746 2010-07-06 20:57:28Z jkim $");
   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     {0, 0}
   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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