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

     /*-
      * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org>
      * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
      * Copyright (c) 2000 Michael Smith <msmith@freebd.org>
      * Copyright (c) 2000 BSDi
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      $FreeBSD: releng/5.0/sys/dev/acpica/acpi_lid.c 105282 2002-10-16 17:28:53Z jhb $
     */
    
    #include "opt_acpi.h"
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    #include <sys/proc.h>
    
    #include "acpi.h"
    
    #include <dev/acpica/acpivar.h>
    
    /*
     * Hooks for the ACPI CA debugging infrastructure
     */
    #define _COMPONENT      ACPI_BUTTON
    ACPI_MODULE_NAME("LID")
    
    struct acpi_lid_softc {
        device_t    lid_dev;
        ACPI_HANDLE lid_handle;
        int         lid_status;     /* open or closed */
    };
    
    static int      acpi_lid_probe(device_t dev);
    static int      acpi_lid_attach(device_t dev);
    static int      acpi_lid_suspend(device_t dev);
    static int      acpi_lid_resume(device_t dev);
    static void     acpi_lid_notify_status_changed(void *arg);
    static void     acpi_lid_notify_handler(ACPI_HANDLE h,UINT32 notify, void *context);
    
    static device_method_t acpi_lid_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,     acpi_lid_probe),
        DEVMETHOD(device_attach,    acpi_lid_attach),
        DEVMETHOD(device_suspend,   acpi_lid_suspend),
        DEVMETHOD(device_resume,    acpi_lid_resume),
    
        {0, 0}
    };
    
    static driver_t acpi_lid_driver = {
        "acpi_lid",
        acpi_lid_methods,
        sizeof(struct acpi_lid_softc),
    };
    
    static devclass_t acpi_lid_devclass;
    DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0);
    
    static int
    acpi_lid_probe(device_t dev)
    {
        if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) && 
            !acpi_disabled("lid") &&
            acpi_MatchHid(dev, "PNP0C0D")) {
            device_set_desc(dev, "Control Method Lid Switch");
            return(0);
        }
        return(ENXIO);
    }
    
    static int
    acpi_lid_attach(device_t dev)
    {
        struct acpi_lid_softc       *sc;
    
        ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
    
        sc = device_get_softc(dev);
       sc->lid_dev = dev;
       sc->lid_handle = acpi_get_handle(dev);
   
       /*
        * Install notification handler
        */
       AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, acpi_lid_notify_handler, sc);
       acpi_device_enable_wake_capability(sc->lid_handle, 1);
       return_VALUE(0);
   }
   
   static int
   acpi_lid_suspend(device_t dev)
   {
       struct acpi_lid_softc       *sc;
   
       sc = device_get_softc(dev);
       acpi_device_enable_wake_event(sc->lid_handle);
       return (0);
   }
   
   static int
   acpi_lid_resume(device_t dev)
   {
       return (0);
   }
   
   static void
   acpi_lid_notify_status_changed(void *arg)
   {
       struct acpi_lid_softc       *sc;
       struct acpi_softc           *acpi_sc;
   
       ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
   
       sc = (struct acpi_lid_softc *)arg;
   
       /*
        * Evaluate _LID and check the return value, update lid status.
        *  Zero:           The lid is closed
        *  Non-zero:       The lid is open
        */
       if (ACPI_FAILURE(acpi_EvaluateInteger(sc->lid_handle, "_LID", &sc->lid_status)))
           return_VOID;
   
       acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
       if (acpi_sc == NULL) {
           return_VOID;
       }
   
       ACPI_VPRINT(sc->lid_dev, acpi_sc,
           "Lid %s\n", sc->lid_status ? "opened" : "closed");
   
       if (sc->lid_status == 0) {
           EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
       } else {
           EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
       }
   
       return_VOID;
   }
   
   /* XXX maybe not here */
   #define ACPI_NOTIFY_STATUS_CHANGED      0x80
   
   static void 
   acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
   {
       struct acpi_lid_softc       *sc = (struct acpi_lid_softc *)context;
   
       ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
   
       switch (notify) {
       case ACPI_NOTIFY_STATUS_CHANGED:
           AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_lid_notify_status_changed, sc);
           break;
       default:
           break;          /* unknown notification value */
       }
       return_VOID;
   }
   

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