FreeBSD/Linux Kernel Cross Reference
sys/pc98/pc98/canbepm.c

     /*-
      * Copyright (c) 2000 KIYOHARA Takashi <kiyohara@kk.iij4u.ne.jp>
      * Copyright (c) 2000 Takanori Watanabe <takawata@jp.FreeBSD.org>
      * 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/6.4/sys/pc98/pc98/canbepm.c 110333 2003-02-04 16:17:13Z nyan $
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/eventhandler.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/reboot.h>
    
    #include <machine/bus.h>
    #include <machine/resource.h>
    #include <sys/rman.h>
    
    #include <pc98/pc98/canbusvars.h>
    #include "canbus_if.h"
    
    
    /* canbepm softc */
    struct canbepm_softc {
            device_t canbepm_dev;                   /* canbepm device */
    
            eventhandler_tag canbepm_tag;           /* event handler tag */
    };
    
    
    static void     canbepm_soft_off (void *, int);
    static void     canbepm_identify (driver_t *, device_t);
    static int      canbepm_probe (device_t);
    static int      canbepm_attach (device_t);
    static int      canbepm_detach (device_t);
    
    
    static device_method_t canbepm_methods[] = { 
            DEVMETHOD(device_identify,      canbepm_identify),
            DEVMETHOD(device_probe,         canbepm_probe),
            DEVMETHOD(device_attach,        canbepm_attach),
            DEVMETHOD(device_detach,        canbepm_detach),
            {0, 0}
    };
    
    static driver_t canbepm_driver = {
            "canbepm",
            canbepm_methods,
            sizeof(struct canbepm_softc),
    };
    
    devclass_t canbepm_devclass;
    DRIVER_MODULE(canbepm, canbus, canbepm_driver, canbepm_devclass, 0, 0);
    MODULE_DEPEND(canbepm, canbus, 1, 1, 1);
    
    
    static void
    canbepm_soft_off (void *data, int howto)
    {
            struct canbepm_softc *sc = data;
            u_int8_t poweroff_data[] = CANBE_POWEROFF_DATA;
    
            if (!(howto & RB_POWEROFF))
                    return;
    
            CANBUS_WRITE_MULTI(device_get_parent(sc->canbepm_dev), sc->canbepm_dev,
                CANBE_POWER_CTRL, sizeof (poweroff_data), poweroff_data);
    }
    
    
    static void
    canbepm_identify(driver_t *drv, device_t parent)
    {
            if (device_find_child(parent, "canbepm", 0) == NULL) {
                    if (BUS_ADD_CHILD(parent, 33, "canbepm", 0) == NULL)
                            device_printf(parent, "canbepm cannot attach\n");
           }
   }
   
   
   static int
   canbepm_probe(device_t dev)
   {
           device_set_desc(dev, "CanBe Power Management Controller");
   
           return (0);     
   }
   
   static int
   canbepm_attach(device_t dev)
   {
           struct canbepm_softc *sc = device_get_softc(dev);
   
           /* eventhandler regist */
           sc->canbepm_tag = EVENTHANDLER_REGISTER(
               shutdown_final, canbepm_soft_off, sc, SHUTDOWN_PRI_LAST);
   
           sc->canbepm_dev = dev;
   
           return (0);
   }
   
   
   static int
   canbepm_detach(device_t dev)
   {
           struct canbepm_softc *sc = device_get_softc(dev);
   
           /* eventhandler deregist */
           EVENTHANDLER_DEREGISTER(shutdown_final, sc->canbepm_tag);
           BUS_CHILD_DETACHED(device_get_parent(dev), dev);
   
           return (0);
   }

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