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

     /*-
      * Copyright (c) 2000 Berkeley Software Design, Inc.
      * Copyright (c) 1997, 1998, 1999, 2000
      *      Bill Paul <wpaul@osd.bsdi.com>.  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 Bill Paul.
     * 4. Neither the name of the author nor the names of any co-contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
     * 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 homePNA PHYs
     * This is really just a stub that allows us to identify homePNA-based
     * transceicers and display the link status. MII-based homePNA PHYs
     * only support one media type and no autonegotiation. If we were
     * really clever, we could tweak some of the vendor-specific registers
     * to optimize the link.
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/socket.h>
    #include <sys/errno.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 pnaphy_probe(device_t);
    static int pnaphy_attach(device_t);
    
    static device_method_t pnaphy_methods[] = {
            /* device interface */
            DEVMETHOD(device_probe,         pnaphy_probe),
            DEVMETHOD(device_attach,        pnaphy_attach),
            DEVMETHOD(device_detach,        mii_phy_detach),
            DEVMETHOD(device_shutdown,      bus_generic_shutdown),
            { 0, 0 }
    };
    
    static devclass_t pnaphy_devclass;
    
    static driver_t pnaphy_driver = {
            "pnaphy",
            pnaphy_methods,
            sizeof(struct mii_softc)
    };
    
    DRIVER_MODULE(pnaphy, miibus, pnaphy_driver, pnaphy_devclass, 0, 0);
    
    static int      pnaphy_service(struct mii_softc *, struct mii_data *,int);
    
    static const struct mii_phydesc pnaphys[] = {
            MII_PHY_DESC(AMD, 79c978),
            MII_PHY_END
    };
    
    static int
    pnaphy_probe(device_t dev)
    {
    
            return (mii_phy_dev_probe(dev, pnaphys, BUS_PROBE_DEFAULT));
    }
    
    static int
   pnaphy_attach(device_t dev)
   {
           struct mii_softc *sc;
           struct mii_attach_args *ma;
           struct mii_data *mii;
           const char *sep = "";
   
           sc = device_get_softc(dev);
           ma = device_get_ivars(dev);
           sc->mii_dev = device_get_parent(dev);
           mii = device_get_softc(sc->mii_dev);
           LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
   
           sc->mii_inst = mii->mii_instance;
           sc->mii_phy = ma->mii_phyno;
           sc->mii_service = pnaphy_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)
   #define PRINT(s)        printf("%s%s", sep, s); sep = ", "
   
           mii_phy_reset(sc);
   
           sc->mii_capabilities =
               PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
           device_printf(dev, " ");
           if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
                   printf("no media present");
           else {
                   ADD(IFM_MAKEWORD(IFM_ETHER, IFM_HPNA_1, 0, sc->mii_inst), 0);
                   PRINT("HomePNA");
           }
           ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
               BMCR_ISO);
   
           printf("\n");
   
   #undef ADD
   #undef PRINT
   
           MIIBUS_MEDIAINIT(sc->mii_dev);
   
           return (0);
   }
   
   static int
   pnaphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
   {
           struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
           int reg;
   
           switch (cmd) {
           case MII_POLLSTAT:
                   /*
                    * If we're not polling our PHY instance, just return.
                    */
                   if (IFM_INST(ife->ifm_media) != sc->mii_inst)
                           return (0);
                   break;
   
           case MII_MEDIACHG:
                   /*
                    * If the media indicates a different PHY instance,
                    * isolate ourselves.
                    */
                   if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
                           reg = PHY_READ(sc, MII_BMCR);
                           PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
                           return (0);
                   }
   
                   /*
                    * If the interface is not up, don't do anything.
                    */
                   if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
                           break;
   
                   switch (IFM_SUBTYPE(ife->ifm_media)) {
                   case IFM_AUTO:
                   case IFM_10_T:
                   case IFM_100_TX:
                   case IFM_100_T4:
                           return (EINVAL);
                   default:
                           /*
                            * BMCR data is stored in the ifmedia entry.
                            */
                           PHY_WRITE(sc, MII_ANAR,
                               mii_anar(ife->ifm_media));
                           PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
                   }
                   break;
   
           case MII_TICK:
                   /*
                    * If we're not currently selected, just return.
                    */
                   if (IFM_INST(ife->ifm_media) != sc->mii_inst)
                           return (0);
                   if (mii_phy_tick(sc) == EJUSTRETURN)
                           return (0);
                   break;
           }
   
           /* Update the media status. */
           ukphy_status(sc);
           if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T)
                   mii->mii_media_active = IFM_ETHER|IFM_HPNA_1;
   
           /* Callback if something changed. */
           mii_phy_update(sc, cmd);
           return (0);
   }

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