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

     /*-
      * Copyright (c) 2000 Takanori Watanabe
      * 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/5.2/sys/dev/acpica/acpi_acad.c 121493 2003-10-25 05:03:25Z njl $
     */
    
    #include "opt_acpi.h"
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    
    #include <machine/bus.h>
    #include <machine/resource.h>
    #include <sys/rman.h>
    #include <sys/ioccom.h>
    #include <sys/malloc.h>
    #include <sys/conf.h>
    #include <sys/power.h>
    
    #include "acpi.h"
    #include <dev/acpica/acpivar.h>
    #include <dev/acpica/acpiio.h>
     
    /* Hooks for the ACPI CA debugging infrastructure */
    #define _COMPONENT      ACPI_AC_ADAPTER
    ACPI_MODULE_NAME("AC_ADAPTER")
    
    /* Number of times to retry initialization before giving up. */
    #define ACPI_ACAD_RETRY_MAX             6
    
    #define ACPI_DEVICE_CHECK_PNP           0x00
    #define ACPI_DEVICE_CHECK_EXISTENCE     0x01
    #define ACPI_POWERSOURCE_STAT_CHANGE    0x80
    
    struct  acpi_acad_softc {
        int status;
        int initializing;
    };
    
    static void     acpi_acad_get_status(void *);
    static void     acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *);
    static int      acpi_acad_probe(device_t);
    static int      acpi_acad_attach(device_t);
    static int      acpi_acad_ioctl(u_long, caddr_t, void *);
    static int      acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
    static void     acpi_acad_init_acline(void *arg);
    
    static device_method_t acpi_acad_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,     acpi_acad_probe),
        DEVMETHOD(device_attach,    acpi_acad_attach),
    
        {0, 0}
    };
    
    static driver_t acpi_acad_driver = {
        "acpi_acad",
        acpi_acad_methods,
        sizeof(struct acpi_acad_softc),
    };
    
    static devclass_t acpi_acad_devclass;
    DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0);
    
    static void
    acpi_acad_get_status(void *context)
    {
        struct acpi_acad_softc *sc;
        device_t    dev;
        ACPI_HANDLE h;
        int         newstatus;
    
        dev = context;
        sc = device_get_softc(dev);
        h = acpi_get_handle(dev);
        if (ACPI_FAILURE(acpi_EvaluateInteger(h, "_PSR", &newstatus))) {
            sc->status = -1;
           return;
       }
   
       if (sc->status != newstatus) {
           sc->status = newstatus;
   
           /* Set system power profile based on AC adapter status */
           power_profile_set_state(sc->status ? POWER_PROFILE_PERFORMANCE :
                                   POWER_PROFILE_ECONOMY);
           ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
                       "%s Line\n", sc->status ? "On" : "Off");
   
           acpi_UserNotify("ACAD", h, sc->status);
       }
   }
   
   static void
   acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
   {
       device_t dev = context;
   
       ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
                   "Notify 0x%x\n", notify);
   
       switch (notify) {
       case ACPI_DEVICE_CHECK_PNP:
       case ACPI_DEVICE_CHECK_EXISTENCE:
       case ACPI_POWERSOURCE_STAT_CHANGE:
           /* Temporarily.  It is better to notify policy manager */
           AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_get_status, context);
           break;
       default:
           break;
       }
   }
   
   static int
   acpi_acad_probe(device_t dev)
   {
       if (acpi_get_type(dev) == ACPI_TYPE_DEVICE &&
           acpi_MatchHid(dev, "ACPI0003")) {
   
           device_set_desc(dev, "AC Adapter");
           return (0);
       }
       return (ENXIO);
   }
   
   static int
   acpi_acad_attach(device_t dev)
   {
       struct acpi_acad_softc *sc;
       struct acpi_softc      *acpi_sc;
       ACPI_HANDLE handle;
       int         error;
   
       sc = device_get_softc(dev);
       if (sc == NULL)
           return (ENXIO);
       handle = acpi_get_handle(dev);
   
       error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
       if (error != 0)
           return (error);
   
       if (device_get_unit(dev) == 0) {
           acpi_sc = acpi_device_get_parent_softc(dev);
           SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
                           SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
                           OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
                           &sc->status, 0, acpi_acad_sysctl, "I", "");
       }
   
       /* Get initial status after whole system is up. */
       sc->status = -1;
       sc->initializing = 0;
   
       /*
        * Also install a system notify handler even though this is not
        * required by the specification.  The Casio FIVA needs this.
        */
       AcpiInstallNotifyHandler(handle, ACPI_SYSTEM_NOTIFY,
                                acpi_acad_notify_handler, dev);
       AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY,
                                acpi_acad_notify_handler, dev);
       AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_init_acline, dev);
   
       return (0);
   }
   
   static int
   acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
   {
       struct acpi_acad_softc *sc;
       device_t dev;
   
       dev = (device_t)arg;
       sc = device_get_softc(dev);
       if (sc == NULL)
           return (ENXIO);
   
       /*
        * No security check required: information retrieval only.  If
        * new functions are added here, a check might be required.
        */
       switch (cmd) {
       case ACPIIO_ACAD_GET_STATUS:
           acpi_acad_get_status(dev);
           *(int *)addr = sc->status;
           break;
       default:
           break;
       }
   
       return (0);
   }
   
   static int
   acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
   {
       int val, error;
   
       if (acpi_acad_get_acline(&val) != 0)
           return (ENXIO);
   
       val = *(u_int *)oidp->oid_arg1;
       error = sysctl_handle_int(oidp, &val, 0, req);
       return (error);
   }
   
   static void
   acpi_acad_init_acline(void *arg)
   {
       struct acpi_acad_softc *sc;
       device_t    dev;
       int         retry, status;
   
       dev = (device_t)arg;
       sc = device_get_softc(dev);
       if (sc->initializing)
           return;
   
       sc->initializing = 1;
       ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
                   "acline initialization start\n");
   
       status = 0;
       for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
           acpi_acad_get_status(dev);
           if (status != sc->status)
               break;
           AcpiOsSleep(10, 0);
       }
   
       sc->initializing = 0;
       ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
                   "acline initialization done, tried %d times\n", retry + 1);
   }
   
   /*
    * Public interfaces.
    */
   int
   acpi_acad_get_acline(int *status)
   {
       struct acpi_acad_softc *sc;
       device_t dev;
   
       dev = devclass_get_device(acpi_acad_devclass, 0);
       if (dev == NULL)
           return (ENXIO);
       sc = device_get_softc(dev);
       if (sc == NULL)
           return (ENXIO);
   
       acpi_acad_get_status(dev);
       *status = sc->status;
   
       return (0);
   }

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