tdkphy.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2000,2001 Jonathan Chen.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions, and the following disclaimer,
   12  *    without modification, immediately at the beginning of the file.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in
   15  *    the documentation and/or other materials provided with the
   16  *    distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   22  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD$");
   33 
   34 /*
   35  * Driver for the TDK 78Q2120 MII
   36  *
   37  * References:
   38  *   Datasheet for the 78Q2120 - http://www.tsc.tdk.com/lan/78q2120.pdf
   39  *   Most of this code stolen from ukphy.c
   40  */
   41 
   42 /*
   43  * The TDK 78Q2120 is found on some Xircom X3201 based CardBus cards,
   44  * also spotted on some 3C575 cards.  It's just like any other normal
   45  * phy, except it does auto negotiation in a different way.
   46  */
   47 
   48 #include <sys/param.h>
   49 #include <sys/systm.h>
   50 #include <sys/kernel.h>
   51 #include <sys/socket.h>
   52 #include <sys/errno.h>
   53 #include <sys/module.h>
   54 #include <sys/bus.h>
   55 
   56 #include <net/if.h>
   57 #include <net/if_media.h>
   58 
   59 #include <dev/mii/mii.h>
   60 #include <dev/mii/miivar.h>
   61 #include "miidevs.h"
   62 
   63 #include <dev/mii/tdkphyreg.h>
   64 
   65 #include "miibus_if.h"
   66 
   67 static int tdkphy_probe(device_t);
   68 static int tdkphy_attach(device_t);
   69 
   70 static device_method_t tdkphy_methods[] = {
   71         /* device interface */
   72         DEVMETHOD(device_probe,         tdkphy_probe),
   73         DEVMETHOD(device_attach,        tdkphy_attach),
   74         DEVMETHOD(device_detach,        mii_phy_detach),
   75         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   76         DEVMETHOD_END
   77 };
   78 
   79 static driver_t tdkphy_driver = {
   80         "tdkphy",
   81         tdkphy_methods,
   82         sizeof(struct mii_softc)
   83 };
   84 
   85 DRIVER_MODULE(tdkphy, miibus, tdkphy_driver, 0, 0);
   86 
   87 static int tdkphy_service(struct mii_softc *, struct mii_data *, int);
   88 static void tdkphy_status(struct mii_softc *);
   89 
   90 static const struct mii_phydesc tdkphys[] = {
   91         MII_PHY_DESC(xxTSC, 78Q2120),
   92         MII_PHY_END
   93 };
   94 
   95 static const struct mii_phy_funcs tdkphy_funcs = {
   96         tdkphy_service,
   97         tdkphy_status,
   98         mii_phy_reset
   99 };
  100 
  101 static int
  102 tdkphy_probe(device_t dev)
  103 {
  104 
  105         return (mii_phy_dev_probe(dev, tdkphys, BUS_PROBE_DEFAULT));
  106 }
  107 
  108 static int
  109 tdkphy_attach(device_t dev)
  110 {
  111 
  112         mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &tdkphy_funcs, 1);
  113         return (0);
  114 }
  115 
  116 static int
  117 tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  118 {
  119 
  120         switch (cmd) {
  121         case MII_POLLSTAT:
  122                 break;
  123 
  124         case MII_MEDIACHG:
  125                 mii_phy_setmedia(sc);
  126                 break;
  127 
  128         case MII_TICK:
  129                 if (mii_phy_tick(sc) == EJUSTRETURN)
  130                         return (0);
  131                 break;
  132         }
  133 
  134         /* Update the media status. */
  135         PHY_STATUS(sc);
  136         if (sc->mii_pdata->mii_media_active & IFM_FDX)
  137                 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX);
  138         else
  139                 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX);
  140 
  141         /* Callback if something changed. */
  142         mii_phy_update(sc, cmd);
  143         return (0);
  144 }
  145 
  146 static void
  147 tdkphy_status(struct mii_softc *phy)
  148 {
  149         struct mii_data *mii = phy->mii_pdata;
  150         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  151         int bmsr, bmcr, anlpar, diag;
  152 
  153         mii->mii_media_status = IFM_AVALID;
  154         mii->mii_media_active = IFM_ETHER;
  155 
  156         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
  157         if (bmsr & BMSR_LINK)
  158                 mii->mii_media_status |= IFM_ACTIVE;
  159 
  160         bmcr = PHY_READ(phy, MII_BMCR);
  161         if (bmcr & BMCR_ISO) {
  162                 mii->mii_media_active |= IFM_NONE;
  163                 mii->mii_media_status = 0;
  164                 return;
  165         }
  166 
  167         if (bmcr & BMCR_LOOP)
  168                 mii->mii_media_active |= IFM_LOOP;
  169 
  170         if (bmcr & BMCR_AUTOEN) {
  171                 /*
  172                  * NWay autonegotiation takes the highest-order common
  173                  * bit of the ANAR and ANLPAR (i.e. best media advertised
  174                  * both by us and our link partner).
  175                  */
  176                 if ((bmsr & BMSR_ACOMP) == 0) {
  177                         /* Erg, still trying, I guess... */
  178                         mii->mii_media_active |= IFM_NONE;
  179                         return;
  180                 }
  181 
  182                 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
  183                 /*
  184                  * ANLPAR doesn't get set on my card, but we check it anyway,
  185                  * since it is mentioned in the 78Q2120 specs.
  186                  */
  187                 if (anlpar & ANLPAR_TX_FD)
  188                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  189                 else if (anlpar & ANLPAR_T4)
  190                         mii->mii_media_active |= IFM_100_T4|IFM_HDX;
  191                 else if (anlpar & ANLPAR_TX)
  192                         mii->mii_media_active |= IFM_100_TX|IFM_HDX;
  193                 else if (anlpar & ANLPAR_10_FD)
  194                         mii->mii_media_active |= IFM_10_T|IFM_FDX;
  195                 else if (anlpar & ANLPAR_10)
  196                         mii->mii_media_active |= IFM_10_T|IFM_HDX;
  197                 else {
  198                         /*
  199                          * ANLPAR isn't set, which leaves two possibilities:
  200                          * 1) Auto negotiation failed
  201                          * 2) Auto negotiation completed, but the card forgot
  202                          *    to set ANLPAR.
  203                          * So we check the MII_DIAG(18) register...
  204                          */
  205                         diag = PHY_READ(phy, MII_DIAG);
  206                         if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */
  207                                 mii->mii_media_active |= IFM_10_T|IFM_HDX;
  208                         else {
  209                                 if (diag & DIAG_DUPLEX)
  210                                         mii->mii_media_active |= IFM_FDX;
  211                                 else
  212                                         mii->mii_media_active |= IFM_HDX;
  213                                 if (diag & DIAG_RATE_100)
  214                                         mii->mii_media_active |= IFM_100_TX;
  215                                 else
  216                                         mii->mii_media_active |= IFM_10_T;
  217                         }
  218                 }
  219                 if ((mii->mii_media_active & IFM_FDX) != 0)
  220                         mii->mii_media_active |= mii_phy_flowstatus(phy);
  221         } else
  222                 mii->mii_media_active = ife->ifm_media;
  223 }

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

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sys/dev/mii/tdkphy.c