FreeBSD/Linux Kernel Cross Reference
sys/dev/smbus/smbus.c

     /*-
      * Copyright (c) 1998, 2001 Nicolas Souchu
      * 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 <sys/param.h>
    #include <sys/systm.h>
    #include <sys/lock.h>
    #include <sys/module.h>
    #include <sys/mutex.h>
    #include <sys/bus.h> 
    
    #include <dev/smbus/smbconf.h>
    #include <dev/smbus/smbus.h>
    
    /*
     * Autoconfiguration and support routines for System Management bus
     */
    
    /*
     * Device methods
     */
    static int smbus_probe(device_t);
    static int smbus_attach(device_t);
    static int smbus_detach(device_t);
    
    static device_method_t smbus_methods[] = {
            /* device interface */
            DEVMETHOD(device_probe,         smbus_probe),
            DEVMETHOD(device_attach,        smbus_attach),
            DEVMETHOD(device_detach,        smbus_detach),
    
            /* bus interface */
            DEVMETHOD(bus_add_child,        bus_generic_add_child),
            DEVMETHOD(bus_print_child,      bus_generic_print_child),
    
            { 0, 0 }
    };
    
    driver_t smbus_driver = {
            "smbus",
            smbus_methods,
            sizeof(struct smbus_softc),
    };
    
    devclass_t smbus_devclass;
    
    /*
     * At 'probe' time, we add all the devices which we know about to the
     * bus.  The generic attach routine will probe and attach them if they
     * are alive.
     */
    static int
    smbus_probe(device_t dev)
    {
    
            device_set_desc(dev, "System Management Bus");
    
            return (0);
    }
    
    static int
    smbus_attach(device_t dev)
    {
            struct smbus_softc *sc = device_get_softc(dev);
    
            mtx_init(&sc->lock, device_get_nameunit(dev), "smbus", MTX_DEF);
            bus_generic_probe(dev);
            bus_generic_attach(dev);
    
            return (0);
    }
    
    static int
   smbus_detach(device_t dev)
   {
           struct smbus_softc *sc = device_get_softc(dev);
           int error;
   
           error = bus_generic_detach(dev);
           if (error)
                   return (error);
           mtx_destroy(&sc->lock);
   
           return (0);
   }
   
   void
   smbus_generic_intr(device_t dev, u_char devaddr, char low, char high)
   {
   }
   
   MODULE_VERSION(smbus, SMBUS_MODVER);

Cache object: 94a910466c205a7572848a6a75f2c67a