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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include "opt_acpi.h"
    #include "opt_evdev.h"
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/bus.h>
    #include <sys/proc.h>
    
    #include <contrib/dev/acpica/include/acpi.h>
    #include <contrib/dev/acpica/include/accommon.h>
    
    #include <dev/acpica/acpivar.h>
    
    #ifdef EVDEV_SUPPORT
    #include <dev/evdev/input.h>
    #include <dev/evdev/evdev.h>
    #endif
    
    /* 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 */
    #ifdef EVDEV_SUPPORT
        struct evdev_dev *lid_evdev;
    #endif
    };
    
    ACPI_HANDLE acpi_lid_handle;
    
    ACPI_SERIAL_DECL(lid, "ACPI lid");
    
    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),
    
        DEVMETHOD_END
    };
    
    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);
    MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1);
    
    static void
    acpi_lid_status_update(struct acpi_lid_softc *sc)
    {
            ACPI_STATUS status;
           int lid_status;
   
           ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
   
           /*
            * Evaluate _LID and check the return value, update lid status.
            *      Zero:           The lid is closed
            *      Non-zero:       The lid is open
            */
           status = acpi_GetInteger(sc->lid_handle, "_LID", &lid_status);
           if (ACPI_FAILURE(status))
                   lid_status = 1;         /* assume lid is opened */
   
           /* range check value */
           sc->lid_status = lid_status ? 1 : 0;
   
   #ifdef EVDEV_SUPPORT
           /* Notify evdev about lid status */
           evdev_push_sw(sc->lid_evdev, SW_LID, lid_status ? 0 : 1);
           evdev_sync(sc->lid_evdev);
   #endif
   }
   
   static int
   acpi_lid_probe(device_t dev)
   {
       static char *lid_ids[] = { "PNP0C0D", NULL };
   
       if (acpi_disabled("lid") ||
           ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids) == NULL)
           return (ENXIO);
   
       device_set_desc(dev, "Control Method Lid Switch");
       return (0);
   }
   
   static int
   acpi_lid_attach(device_t dev)
   {
       struct acpi_prw_data        prw;
       struct acpi_lid_softc       *sc;
   
       ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
   
       sc = device_get_softc(dev);
       sc->lid_dev = dev;
       acpi_lid_handle = sc->lid_handle = acpi_get_handle(dev);
   
   #ifdef EVDEV_SUPPORT
       /* Register evdev device before initial status update */
       sc->lid_evdev = evdev_alloc();
       evdev_set_name(sc->lid_evdev, device_get_desc(dev));
       evdev_set_phys(sc->lid_evdev, device_get_nameunit(dev));
       evdev_set_id(sc->lid_evdev, BUS_HOST, 0, 0, 1);
       evdev_support_event(sc->lid_evdev, EV_SYN);
       evdev_support_event(sc->lid_evdev, EV_SW);
       evdev_support_sw(sc->lid_evdev, SW_LID);
   
       if (evdev_register(sc->lid_evdev))
           return (ENXIO);
   #endif
   
       /*
        * If a system does not get lid events, it may make sense to change
        * the type to ACPI_ALL_NOTIFY.  Some systems generate both a wake and
        * runtime notify in that case though.
        */
       AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY,
                                acpi_lid_notify_handler, sc);
   
       /* Enable the GPE for wake/runtime. */
       acpi_wake_set_enable(dev, 1);
       if (acpi_parse_prw(sc->lid_handle, &prw) == 0)
           AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
   
       /* Get the initial lid status */
       acpi_lid_status_update(sc);
   
       /*
        * Export the lid status
        */
       SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
           SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
           "state", CTLFLAG_RD, &sc->lid_status, 0,
           "Device state (0 = closed, 1 = open)");
   
       return (0);
   }
   
   static int
   acpi_lid_suspend(device_t dev)
   {
       return (0);
   }
   
   static int
   acpi_lid_resume(device_t dev)
   {
       struct acpi_lid_softc       *sc;
   
       sc = device_get_softc(dev);
   
       /* Update lid status, if any */
       acpi_lid_status_update(sc);
   
       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;
       ACPI_SERIAL_BEGIN(lid);
   
       /* Update lid status, if any */
       acpi_lid_status_update(sc);
   
       acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
       if (acpi_sc == NULL)
           goto out;
   
       ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n",
                   sc->lid_status ? "opened" : "closed");
   
       acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
   
       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);
   
   out:
       ACPI_SERIAL_END(lid);
       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;
   
       ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
   
       sc = (struct acpi_lid_softc *)context;
       switch (notify) {
       case ACPI_NOTIFY_STATUS_CHANGED:
           AcpiOsExecute(OSL_NOTIFY_HANDLER,
                         acpi_lid_notify_status_changed, sc);
           break;
       default:
           device_printf(sc->lid_dev, "unknown notify %#x\n", notify);
           break;
       }
   
       return_VOID;
   }

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