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

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-NetBSD
      *
      * Copyright (c) 1998, 1999, 2000, 2001 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.
     *
     * 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 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.
     *
     * 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.
     *
     *      from: NetBSD: bmtphy.c,v 1.8 2002/07/03 06:25:50 simonb Exp
     *
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    /*
     * Driver for the Broadcom BCM5201/BCM5202 "Mini-Theta" PHYs.  This also
     * drives the PHY on the 3Com 3c905C.  The 3c905C's PHY is described in
     * the 3c905C data sheet.
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/socket.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 <dev/mii/bmtphyreg.h>
    
    #include "miibus_if.h"
    
    static int      bmtphy_probe(device_t);
    static int      bmtphy_attach(device_t);
    
    static device_method_t bmtphy_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         bmtphy_probe),
            DEVMETHOD(device_attach,        bmtphy_attach),
            DEVMETHOD(device_detach,        mii_phy_detach),
            DEVMETHOD(device_shutdown,      bus_generic_shutdown),
            DEVMETHOD_END
    };
    
    static devclass_t       bmtphy_devclass;
   
   static driver_t bmtphy_driver = {
           "bmtphy",
           bmtphy_methods,
           sizeof(struct mii_softc)
   };
   
   DRIVER_MODULE(bmtphy, miibus, bmtphy_driver, bmtphy_devclass, 0, 0);
   
   static int      bmtphy_service(struct mii_softc *, struct mii_data *, int);
   static void     bmtphy_status(struct mii_softc *);
   static void     bmtphy_reset(struct mii_softc *);
   
   static const struct mii_phydesc bmtphys_dp[] = {
           MII_PHY_DESC(xxBROADCOM, BCM4401),
           MII_PHY_DESC(xxBROADCOM, BCM5201),
           MII_PHY_DESC(xxBROADCOM, BCM5214),
           MII_PHY_DESC(xxBROADCOM, BCM5221),
           MII_PHY_DESC(xxBROADCOM, BCM5222),
           MII_PHY_END
   };
   
   static const struct mii_phydesc bmtphys_lp[] = {
           MII_PHY_DESC(xxBROADCOM, 3C905B),
           MII_PHY_DESC(xxBROADCOM, 3C905C),
           MII_PHY_END
   };
   
   static const struct mii_phy_funcs bmtphy_funcs = {
           bmtphy_service,
           bmtphy_status,
           bmtphy_reset 
   };
   
   static int
   bmtphy_probe(device_t dev)
   {
           int     rval;
   
           /* Let exphy(4) take precedence for these. */
           rval = mii_phy_dev_probe(dev, bmtphys_lp, BUS_PROBE_LOW_PRIORITY);
           if (rval <= 0)
                   return (rval);
   
           return (mii_phy_dev_probe(dev, bmtphys_dp, BUS_PROBE_DEFAULT));
   }
   
   static int
   bmtphy_attach(device_t dev)
   {
   
           mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &bmtphy_funcs, 1);
           return (0);
   }
   
   static int
   bmtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
   {
   
           switch (cmd) {
           case MII_POLLSTAT:
                   break;
   
           case MII_MEDIACHG:
                   mii_phy_setmedia(sc);
                   break;
   
           case MII_TICK:
                   if (mii_phy_tick(sc) == EJUSTRETURN)
                           return (0);
                   break;
           }
   
           /* Update the media status. */
           PHY_STATUS(sc);
   
           /* Callback if something changed. */
           mii_phy_update(sc, cmd);
           return (0);
   }
   
   static void
   bmtphy_status(struct mii_softc *sc)
   {
           struct mii_data *mii;
           struct ifmedia_entry *ife;
           int bmsr, bmcr, aux_csr;
   
           mii = sc->mii_pdata;
           ife = mii->mii_media.ifm_cur;
   
           mii->mii_media_status = IFM_AVALID;
           mii->mii_media_active = IFM_ETHER;
   
           bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
   
           if (bmsr & BMSR_LINK)
                   mii->mii_media_status |= IFM_ACTIVE;
   
           bmcr = PHY_READ(sc, MII_BMCR);
           if (bmcr & BMCR_ISO) {
                   mii->mii_media_active |= IFM_NONE;
                   mii->mii_media_status = 0;
                   return;
           }
   
           if (bmcr & BMCR_LOOP)
                   mii->mii_media_active |= IFM_LOOP;
   
           if (bmcr & BMCR_AUTOEN) {
                   /*
                    * The media status bits are only valid if autonegotiation
                    * has completed (or it's disabled).
                    */
                   if ((bmsr & BMSR_ACOMP) == 0) {
                           /* Erg, still trying, I guess... */
                           mii->mii_media_active |= IFM_NONE;
                           return;
                   }
   
                   aux_csr = PHY_READ(sc, MII_BMTPHY_AUX_CSR);
                   if (aux_csr & AUX_CSR_SPEED)
                           mii->mii_media_active |= IFM_100_TX;
                   else
                           mii->mii_media_active |= IFM_10_T;
                   if (aux_csr & AUX_CSR_FDX)
                           mii->mii_media_active |=
                               IFM_FDX | mii_phy_flowstatus(sc);
                   else
                           mii->mii_media_active |= IFM_HDX;
           } else
                   mii->mii_media_active = ife->ifm_media;
   }
   
   static void
   bmtphy_reset(struct mii_softc *sc)
   {
           u_int16_t data;
   
           mii_phy_reset(sc);
   
           if (sc->mii_mpd_model == MII_MODEL_xxBROADCOM_BCM5221) {
                   /* Enable shadow register mode. */
                   data = PHY_READ(sc, 0x1f);
                   PHY_WRITE(sc, 0x1f, data | 0x0080);
   
                   /* Enable APD (Auto PowerDetect). */
                   data = PHY_READ(sc, MII_BMTPHY_AUX2);
                   PHY_WRITE(sc, MII_BMTPHY_AUX2, data | 0x0020);
   
                   /* Enable clocks across APD for Auto-MDIX functionality. */
                   data = PHY_READ(sc, MII_BMTPHY_INTR);
                   PHY_WRITE(sc, MII_BMTPHY_INTR, data | 0x0004);
   
                   /* Disable shadow register mode. */
                   data = PHY_READ(sc, 0x1f);
                   PHY_WRITE(sc, 0x1f, data & ~0x0080);
           }
   }

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