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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include "opt_acpi.h"
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    
    #include <machine/bus.h>
    #include <sys/rman.h>
    #include <sys/ioccom.h>
    #include <sys/malloc.h>
    #include <sys/module.h>
    #include <sys/conf.h>
    #include <sys/power.h>
    
    #include <contrib/dev/acpica/acpi.h>
    #include <dev/acpica/acpivar.h>
    #include <dev/acpica/acpiio.h>
    #include <isa/isavar.h>
    #include <isa/pnpvar.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_POWERSOURCE_STAT_CHANGE    0x80
    
    struct  acpi_acad_softc {
        int status;
    };
    
    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 void     acpi_acad_ac_only(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);
    MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
    
    ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
    
    SYSINIT(acad, SI_SUB_KTHREAD_IDLE, SI_ORDER_FIRST, acpi_acad_ac_only, NULL);
    
    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);
       newstatus = -1;
       acpi_GetInteger(h, "_PSR", &newstatus);
   
       /* If status is valid and has changed, notify the system. */
       ACPI_SERIAL_BEGIN(acad);
       if (newstatus != -1 && sc->status != newstatus) {
           sc->status = newstatus;
           ACPI_SERIAL_END(acad);
           power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE :
               POWER_PROFILE_ECONOMY);
           ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
               "%s Line\n", newstatus ? "On" : "Off");
           acpi_UserNotify("ACAD", h, newstatus);
       } else
           ACPI_SERIAL_END(acad);
   }
   
   static void
   acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
   {
       device_t dev;
   
       dev = (device_t)context;
       switch (notify) {
       case ACPI_NOTIFY_BUS_CHECK:
       case ACPI_NOTIFY_DEVICE_CHECK:
       case ACPI_POWERSOURCE_STAT_CHANGE:
           /* Temporarily.  It is better to notify policy manager */
           AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context);
           break;
       default:
           device_printf(dev, "unknown notify %#x\n", notify);
           break;
       }
   }
   
   static int
   acpi_acad_probe(device_t dev)
   {
       static char *acad_ids[] = { "ACPI0003", NULL };
   
       if (acpi_disabled("acad") ||
           ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL)
           return (ENXIO);
   
       device_set_desc(dev, "AC Adapter");
       return (0);
   }
   
   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);
       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;
   
       /*
        * Install both system and device notify handlers since the Casio
        * FIVA needs them.
        */
       AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
                                acpi_acad_notify_handler, dev);
       AcpiOsExecute(OSL_NOTIFY_HANDLER, 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);
   
       /*
        * 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;
   
       dev = (device_t)arg;
       sc = device_get_softc(dev);
       ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
                   "acline initialization start\n");
   
       for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
           acpi_acad_get_status(dev);
           if (sc->status != -1)
               break;
           AcpiOsSleep(10000);
       }
   
       ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
                   "acline initialization done, tried %d times\n", retry + 1);
   }
   
   /*
    * If no AC line devices detected after boot, create an "online" event
    * so that userland code can adjust power settings accordingly.  The default
    * power profile is "performance" so we don't need to repeat that here.
    */
   static void
   acpi_acad_ac_only(void __unused *arg)
   {
   
       if (devclass_get_count(acpi_acad_devclass) == 0)
           acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 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);
   
       acpi_acad_get_status(dev);
       *status = sc->status;
   
       return (0);
   }

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