FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/exphy.c

     /*      $NetBSD: exphy.c,v 1.16 1999/04/23 04:24:32 thorpej Exp $       */
     
     /*-
      * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      * NASA Ames Research Center, and by Frank van der Linden.
     *
     * 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the NetBSD
     *      Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
     */
    
    /*-
     * Copyright (c) 1997 Manuel Bouyer.  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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Manuel Bouyer.
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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("$FreeBSD$");
    
    /*
     * driver for 3Com internal PHYs
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/socket.h>
    #include <sys/module.h>
    #include <sys/bus.h>
    
    #include <net/if.h>
    #include <net/if_media.h>
    
    #include <dev/mii/mii.h>
    #include <dev/mii/miivar.h>
    #include "miidevs.h"
    
    #include "miibus_if.h"
    
    static int exphy_probe(device_t);
    static int exphy_attach(device_t);
    
    static device_method_t exphy_methods[] = {
            /* device interface */
            DEVMETHOD(device_probe,         exphy_probe),
            DEVMETHOD(device_attach,        exphy_attach),
            DEVMETHOD(device_detach,        mii_phy_detach),
           DEVMETHOD(device_shutdown,      bus_generic_shutdown),
           { 0, 0 }
   };
   
   static devclass_t exphy_devclass;
   
   static driver_t exphy_driver = {
           "xlphy",
           exphy_methods,
           sizeof(struct mii_softc)
   };
   
   DRIVER_MODULE(xlphy, miibus, exphy_driver, exphy_devclass, 0, 0);
   
   static int      exphy_service(struct mii_softc *, struct mii_data *, int);
   static void     exphy_reset(struct mii_softc *);
   
   /*
    * Some 3Com internal PHYs report zero for OUI and model, others use
    * actual values.
    * Note that the 3Com internal PHYs having OUI 0x105a and model 0 are
    * handled fine by ukphy(4); they can be isolated and don't require
    * special treatment after reset.
    */
   static const struct mii_phydesc exphys[] = {
           { 0, 0, "3Com internal media interface" },
           MII_PHY_DESC(BROADCOM, 3C905C),
           MII_PHY_END
   };
           
   static int
   exphy_probe(device_t dev)
   {
   
           if (strcmp(device_get_name(device_get_parent(device_get_parent(dev))),
               "xl") == 0)
                   return (mii_phy_dev_probe(dev, exphys, BUS_PROBE_DEFAULT));
           return (ENXIO);
   }
   
   static int
   exphy_attach(device_t dev)
   {
           struct mii_softc *sc;
           struct mii_attach_args *ma;
           struct mii_data *mii;
   
           sc = device_get_softc(dev);
           ma = device_get_ivars(dev);
           sc->mii_dev = device_get_parent(dev);
           mii = device_get_softc(sc->mii_dev);
   
           /*
            * The 3Com PHY can never be isolated, so never allow non-zero
            * instances!
            */
           if (mii->mii_instance != 0) {
                   device_printf(dev, "ignoring this PHY, non-zero instance\n");
                   return (ENXIO);
           }
   
           LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
   
           sc->mii_inst = mii->mii_instance;
           sc->mii_phy = ma->mii_phyno;
           sc->mii_service = exphy_service;
           sc->mii_pdata = mii;
           mii->mii_instance++;
   
           sc->mii_flags |= MIIF_NOISOLATE;
   
   #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
   
           ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
               MII_MEDIA_100_TX);
   
           exphy_reset(sc);
   
           sc->mii_capabilities =
               PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
           device_printf(dev, " ");
           mii_phy_add_media(sc);
           printf("\n");
   #undef ADD
           MIIBUS_MEDIAINIT(sc->mii_dev);
           return (0);
   }
   
   static int
   exphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
   {
           struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
   
           /*
            * We can't isolate the 3Com PHY, so it has to be the only one!
            */
           if (IFM_INST(ife->ifm_media) != sc->mii_inst)
                   panic("exphy_service: can't isolate 3Com PHY");
   
           switch (cmd) {
           case MII_POLLSTAT:
                   break;
   
           case MII_MEDIACHG:
                   /*
                    * If the interface is not up, don't do anything.
                    */
                   if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
                           break;
   
                   mii_phy_setmedia(sc);
                   break;
   
           case MII_TICK:
                   /*
                    * Is the interface even up?
                    */
                   if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
                           return (0);
   
                   /*
                    * The 3Com PHY's autonegotiation doesn't need to be
                    * kicked; it continues in the background.
                    */
                   break;
           }
   
           /* Update the media status. */
           ukphy_status(sc);
   
           /* Callback if something changed. */
           mii_phy_update(sc, cmd);
           return (0);
   }
   
   static void
   exphy_reset(struct mii_softc *sc)
   {
   
           mii_phy_reset(sc);
   
           /*
            * XXX 3Com PHY doesn't set the BMCR properly after
            * XXX reset, which breaks autonegotiation.
            */
           PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_AUTOEN|BMCR_FDX);
   }

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