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 devclass_t tdkphy_devclass;
   80 
   81 static driver_t tdkphy_driver = {
   82         "tdkphy",
   83         tdkphy_methods,
   84         sizeof(struct mii_softc)
   85 };
   86 
   87 DRIVER_MODULE(tdkphy, miibus, tdkphy_driver, tdkphy_devclass, 0, 0);
   88 
   89 static int tdkphy_service(struct mii_softc *, struct mii_data *, int);
   90 static void tdkphy_status(struct mii_softc *);
   91 
   92 static const struct mii_phydesc tdkphys[] = {
   93         MII_PHY_DESC(xxTSC, 78Q2120),
   94         MII_PHY_END
   95 };
   96 
   97 static const struct mii_phy_funcs tdkphy_funcs = {
   98         tdkphy_service,
   99         tdkphy_status,
  100         mii_phy_reset
  101 };
  102 
  103 static int
  104 tdkphy_probe(device_t dev)
  105 {
  106 
  107         return (mii_phy_dev_probe(dev, tdkphys, BUS_PROBE_DEFAULT));
  108 }
  109 
  110 static int
  111 tdkphy_attach(device_t dev)
  112 {
  113 
  114         mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &tdkphy_funcs, 1);
  115         return (0);
  116 }
  117 
  118 static int
  119 tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  120 {
  121 
  122         switch (cmd) {
  123         case MII_POLLSTAT:
  124                 break;
  125 
  126         case MII_MEDIACHG:
  127                 mii_phy_setmedia(sc);
  128                 break;
  129 
  130         case MII_TICK:
  131                 if (mii_phy_tick(sc) == EJUSTRETURN)
  132                         return (0);
  133                 break;
  134         }
  135 
  136         /* Update the media status. */
  137         PHY_STATUS(sc);
  138         if (sc->mii_pdata->mii_media_active & IFM_FDX)
  139                 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX);
  140         else
  141                 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX);
  142 
  143         /* Callback if something changed. */
  144         mii_phy_update(sc, cmd);
  145         return (0);
  146 }
  147 
  148 static void
  149 tdkphy_status(struct mii_softc *phy)
  150 {
  151         struct mii_data *mii = phy->mii_pdata;
  152         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  153         int bmsr, bmcr, anlpar, diag;
  154 
  155         mii->mii_media_status = IFM_AVALID;
  156         mii->mii_media_active = IFM_ETHER;
  157 
  158         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
  159         if (bmsr & BMSR_LINK)
  160                 mii->mii_media_status |= IFM_ACTIVE;
  161 
  162         bmcr = PHY_READ(phy, MII_BMCR);
  163         if (bmcr & BMCR_ISO) {
  164                 mii->mii_media_active |= IFM_NONE;
  165                 mii->mii_media_status = 0;
  166                 return;
  167         }
  168 
  169         if (bmcr & BMCR_LOOP)
  170                 mii->mii_media_active |= IFM_LOOP;
  171 
  172         if (bmcr & BMCR_AUTOEN) {
  173                 /*
  174                  * NWay autonegotiation takes the highest-order common
  175                  * bit of the ANAR and ANLPAR (i.e. best media advertised
  176                  * both by us and our link partner).
  177                  */
  178                 if ((bmsr & BMSR_ACOMP) == 0) {
  179                         /* Erg, still trying, I guess... */
  180                         mii->mii_media_active |= IFM_NONE;
  181                         return;
  182                 }
  183 
  184                 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
  185                 /*
  186                  * ANLPAR doesn't get set on my card, but we check it anyway,
  187                  * since it is mentioned in the 78Q2120 specs.
  188                  */
  189                 if (anlpar & ANLPAR_TX_FD)
  190                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  191                 else if (anlpar & ANLPAR_T4)
  192                         mii->mii_media_active |= IFM_100_T4|IFM_HDX;
  193                 else if (anlpar & ANLPAR_TX)
  194                         mii->mii_media_active |= IFM_100_TX|IFM_HDX;
  195                 else if (anlpar & ANLPAR_10_FD)
  196                         mii->mii_media_active |= IFM_10_T|IFM_FDX;
  197                 else if (anlpar & ANLPAR_10)
  198                         mii->mii_media_active |= IFM_10_T|IFM_HDX;
  199                 else {
  200                         /*
  201                          * ANLPAR isn't set, which leaves two possibilities:
  202                          * 1) Auto negotiation failed
  203                          * 2) Auto negotiation completed, but the card forgot
  204                          *    to set ANLPAR.
  205                          * So we check the MII_DIAG(18) register...
  206                          */
  207                         diag = PHY_READ(phy, MII_DIAG);
  208                         if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */
  209                                 mii->mii_media_active |= IFM_10_T|IFM_HDX;
  210                         else {
  211                                 if (diag & DIAG_DUPLEX)
  212                                         mii->mii_media_active |= IFM_FDX;
  213                                 else
  214                                         mii->mii_media_active |= IFM_HDX;
  215                                 if (diag & DIAG_RATE_100)
  216                                         mii->mii_media_active |= IFM_100_TX;
  217                                 else
  218                                         mii->mii_media_active |= IFM_10_T;
  219                         }
  220                 }
  221                 if ((mii->mii_media_active & IFM_FDX) != 0)
  222                         mii->mii_media_active |= mii_phy_flowstatus(phy);
  223         } else
  224                 mii->mii_media_active = ife->ifm_media;
  225 }

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

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sys/dev/mii/tdkphy.c