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

     /*-
      * Copyright (c) 2011-2012 Stefan Bethke.
      * 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.
     *
     * $FreeBSD$
     */
    
    #include <sys/param.h>
    #include <sys/bus.h>
    #include <sys/systm.h>
    #include <sys/module.h>
    
    #include <dev/mdio/mdio.h>
    
    #include "mdio_if.h"
    
    static void
    mdio_identify(driver_t *driver, device_t parent)
    {
    
            if (device_find_child(parent, mdio_driver.name, -1) == NULL)
                    BUS_ADD_CHILD(parent, 0, mdio_driver.name, -1);
    }
    
    static int
    mdio_probe(device_t dev)
    {
    
            device_set_desc(dev, "MDIO");
    
            return (BUS_PROBE_SPECIFIC);
    }
    
    static int
    mdio_attach(device_t dev)
    {
    
            bus_generic_probe(dev);
            bus_enumerate_hinted_children(dev);
            return (bus_generic_attach(dev));
    }
    
    static int
    mdio_detach(device_t dev)
    {
    
            bus_generic_detach(dev);
            return (0);
    }
    
    static int
    mdio_readreg(device_t dev, int phy, int reg)
    {
    
            return (MDIO_READREG(device_get_parent(dev), phy, reg));
    }
    
    static int
    mdio_writereg(device_t dev, int phy, int reg, int val)
    {
    
            return (MDIO_WRITEREG(device_get_parent(dev), phy, reg, val));
    }
    
    static int
    mdio_readextreg(device_t dev, int phy, int devad, int reg)
    {
    
            return (MDIO_READEXTREG(device_get_parent(dev), phy, devad, reg));
    }
    
    static int
    mdio_writeextreg(device_t dev, int phy, int devad, int reg,
        int val)
    {
    
            return (MDIO_WRITEEXTREG(device_get_parent(dev), phy, devad, reg, val));
    }
   
   static void
   mdio_hinted_child(device_t dev, const char *name, int unit)
   {
   
           device_add_child(dev, name, unit);
   }
   
   static device_method_t mdio_methods[] = {
           /* device interface */
           DEVMETHOD(device_identify,      mdio_identify),
           DEVMETHOD(device_probe,         mdio_probe),
           DEVMETHOD(device_attach,        mdio_attach),
           DEVMETHOD(device_detach,        mdio_detach),
           DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   
           /* bus interface */
           DEVMETHOD(bus_add_child,        device_add_child_ordered),
           DEVMETHOD(bus_hinted_child,     mdio_hinted_child),
   
           /* MDIO access */
           DEVMETHOD(mdio_readreg,         mdio_readreg),
           DEVMETHOD(mdio_writereg,        mdio_writereg),
           DEVMETHOD(mdio_readextreg,      mdio_readextreg),
           DEVMETHOD(mdio_writeextreg,     mdio_writeextreg),
   
           DEVMETHOD_END
   };
   
   driver_t mdio_driver = {
           "mdio",
           mdio_methods,
           0
   };
   
   MODULE_VERSION(mdio, 1);

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