tdkphy.c

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    1 /*-
    2  * Copyright (c) 2000,2001 Jonathan Chen.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions, and the following disclaimer,
   10  *    without modification, immediately at the beginning of the file.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in
   13  *    the documentation and/or other materials provided with the
   14  *    distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 /*
   33  * Driver for the TDK 78Q2120 MII
   34  *
   35  * References:
   36  *   Datasheet for the 78Q2120 - http://www.tsc.tdk.com/lan/78q2120.pdf
   37  *   Most of this code stolen from ukphy.c
   38  */
   39 
   40 /*
   41  * The TDK 78Q2120 is found on some Xircom X3201 based cardbus cards,
   42  * also spotted on some 3C575 cards.  It's just like any other normal
   43  * phy, except it does auto negotiation in a different way.
   44  */
   45 
   46 #include <sys/param.h>
   47 #include <sys/systm.h>
   48 #include <sys/kernel.h>
   49 #include <sys/socket.h>
   50 #include <sys/errno.h>
   51 #include <sys/module.h>
   52 #include <sys/bus.h>
   53 
   54 #include <net/if.h>
   55 #include <net/if_media.h>
   56 
   57 #include <dev/mii/mii.h>
   58 #include <dev/mii/miivar.h>
   59 #include "miidevs.h"
   60 
   61 #include <dev/mii/tdkphyreg.h>
   62 
   63 #include "miibus_if.h"
   64 
   65 static int tdkphy_probe(device_t);
   66 static int tdkphy_attach(device_t);
   67 
   68 static device_method_t tdkphy_methods[] = {
   69         /* device interface */
   70         DEVMETHOD(device_probe,         tdkphy_probe),
   71         DEVMETHOD(device_attach,        tdkphy_attach),
   72         DEVMETHOD(device_detach,        mii_phy_detach),
   73         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   74         { 0, 0 }
   75 };
   76 
   77 static devclass_t tdkphy_devclass;
   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, tdkphy_devclass, 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(TDK, 78Q2120),
   92         MII_PHY_END
   93 };
   94 
   95 static int
   96 tdkphy_probe(device_t dev)
   97 {
   98 
   99         return (mii_phy_dev_probe(dev, tdkphys, BUS_PROBE_DEFAULT));
  100 }
  101 
  102 static int
  103 tdkphy_attach(device_t dev)
  104 {
  105         struct mii_softc *sc;
  106         struct mii_attach_args *ma;
  107         struct mii_data *mii;
  108         sc = device_get_softc(dev);
  109         ma = device_get_ivars(dev);
  110         sc->mii_dev = device_get_parent(dev);
  111         mii = device_get_softc(sc->mii_dev);
  112         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  113 
  114         if (bootverbose)
  115                 device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n",
  116                     MII_OUI(ma->mii_id1, ma->mii_id2),
  117                     MII_MODEL(ma->mii_id2), MII_REV(ma->mii_id2));
  118 
  119         sc->mii_inst = mii->mii_instance;
  120         sc->mii_phy = ma->mii_phyno;
  121         sc->mii_service = tdkphy_service;
  122         sc->mii_pdata = mii;
  123 
  124         mii->mii_instance++;
  125 
  126         /*
  127          * Apparently, we can't do loopback on this PHY.
  128          */
  129         sc->mii_flags |= MIIF_NOLOOP;
  130 
  131         mii_phy_reset(sc);
  132 
  133         sc->mii_capabilities =
  134             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  135         device_printf(dev, " ");
  136         mii_phy_add_media(sc);
  137         printf("\n");
  138 
  139         MIIBUS_MEDIAINIT(sc->mii_dev);
  140         return (0);
  141 }
  142 
  143 static int
  144 tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  145 {
  146         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  147         int reg;
  148 
  149         switch (cmd) {
  150         case MII_POLLSTAT:
  151                 /*
  152                  * If we're not polling our PHY instance, just return.
  153                  */
  154                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  155                         return (0);
  156                 break;
  157 
  158         case MII_MEDIACHG:
  159                 /*
  160                  * If the media indicates a different PHY instance,
  161                  * isolate ourselves.
  162                  */
  163                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  164                         reg = PHY_READ(sc, MII_BMCR);
  165                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  166                         return (0);
  167                 }
  168 
  169                 /*
  170                  * If the interface is not up, don't do anything.
  171                  */
  172                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  173                         break;
  174 
  175                 mii_phy_setmedia(sc);
  176                 break;
  177 
  178         case MII_TICK:
  179                 /*
  180                  * If we're not currently selected, just return.
  181                  */
  182                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  183                         return (0);
  184                 if (mii_phy_tick(sc) == EJUSTRETURN)
  185                         return (0);
  186                 break;
  187         }
  188 
  189         /* Update the media status. */
  190         tdkphy_status(sc);
  191         if (sc->mii_pdata->mii_media_active & IFM_FDX)
  192                 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX);
  193         else
  194                 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX);
  195 
  196         /* Callback if something changed. */
  197         mii_phy_update(sc, cmd);
  198         return (0);
  199 }
  200 
  201 static void
  202 tdkphy_status(struct mii_softc *phy)
  203 {
  204         struct mii_data *mii = phy->mii_pdata;
  205         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  206         int bmsr, bmcr, anlpar, diag;
  207 
  208         mii->mii_media_status = IFM_AVALID;
  209         mii->mii_media_active = IFM_ETHER;
  210 
  211         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
  212         if (bmsr & BMSR_LINK)
  213                 mii->mii_media_status |= IFM_ACTIVE;
  214 
  215         bmcr = PHY_READ(phy, MII_BMCR);
  216         if (bmcr & BMCR_ISO) {
  217                 mii->mii_media_active |= IFM_NONE;
  218                 mii->mii_media_status = 0;
  219                 return;
  220         }
  221 
  222         if (bmcr & BMCR_LOOP)
  223                 mii->mii_media_active |= IFM_LOOP;
  224 
  225         if (bmcr & BMCR_AUTOEN) {
  226                 /*
  227                  * NWay autonegotiation takes the highest-order common
  228                  * bit of the ANAR and ANLPAR (i.e. best media advertised
  229                  * both by us and our link partner).
  230                  */
  231                 if ((bmsr & BMSR_ACOMP) == 0) {
  232                         /* Erg, still trying, I guess... */
  233                         mii->mii_media_active |= IFM_NONE;
  234                         return;
  235                 }
  236 
  237                 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
  238                 /*
  239                  * ANLPAR doesn't get set on my card, but we check it anyway,
  240                  * since it is mentioned in the 78Q2120 specs.
  241                  */
  242                 if (anlpar & ANLPAR_TX_FD)
  243                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  244                 else if (anlpar & ANLPAR_T4)
  245                         mii->mii_media_active |= IFM_100_T4;
  246                 else if (anlpar & ANLPAR_TX)
  247                         mii->mii_media_active |= IFM_100_TX;
  248                 else if (anlpar & ANLPAR_10_FD)
  249                         mii->mii_media_active |= IFM_10_T|IFM_FDX;
  250                 else if (anlpar & ANLPAR_10)
  251                         mii->mii_media_active |= IFM_10_T;
  252                 else {
  253                         /*
  254                          * ANLPAR isn't set, which leaves two possibilities:
  255                          * 1) Auto negotiation failed
  256                          * 2) Auto negotiation completed, but the card forgot
  257                          *    to set ANLPAR.
  258                          * So we check the MII_DIAG(18) register...
  259                          */
  260                         diag = PHY_READ(phy, MII_DIAG);
  261                         if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */
  262                                 mii->mii_media_active |= IFM_10_T;
  263                         else {
  264                                 if (diag & DIAG_DUPLEX)
  265                                         mii->mii_media_active |= IFM_FDX;
  266                                 if (diag & DIAG_RATE_100)
  267                                         mii->mii_media_active |= IFM_100_TX;
  268                                 else
  269                                         mii->mii_media_active |= IFM_10_T;
  270                         }
  271                 }
  272         } else
  273                 mii->mii_media_active = ife->ifm_media;
  274 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/tdkphy.c

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