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  * $FreeBSD: releng/5.0/sys/dev/mii/tdkphy.c 106107 2002-10-29 00:20:47Z semenu $
   29  */
   30 
   31 /*
   32  * Driver for the TDK 78Q2120 MII
   33  *
   34  * References:
   35  *   Datasheet for the 78Q2120 - http://www.tsc.tdk.com/lan/78q2120.pdf
   36  *   Most of this code stolen from ukphy.c
   37  */
   38 
   39 /*
   40  * The TDK 78Q2120 is found on some Xircom X3201 based cardbus cards.  It's just
   41  * like any other normal phy, except it does auto negotiation in a different
   42  * way.
   43  */
   44 
   45 #include <sys/param.h>
   46 #include <sys/systm.h>
   47 #include <sys/kernel.h>
   48 #include <sys/socket.h>
   49 #include <sys/errno.h>
   50 #include <sys/module.h>
   51 #include <sys/bus.h>
   52 
   53 #include <net/if.h>
   54 #include <net/if_media.h>
   55 
   56 #include <machine/clock.h>
   57 
   58 #include <dev/mii/mii.h>
   59 #include <dev/mii/miivar.h>
   60 #include <dev/mii/miidevs.h>
   61 
   62 #include <dev/mii/tdkphyreg.h>
   63 
   64 #include "miibus_if.h"
   65 
   66 #if !defined(lint)
   67 static const char rcsid[] =
   68   "$Id: tdkphy.c,v 1.3 2000/10/14 06:20:56 jon Exp $";
   69 #endif
   70 
   71 static int tdkphy_probe(device_t);
   72 static int tdkphy_attach(device_t);
   73 
   74 static device_method_t tdkphy_methods[] = {
   75         /* device interface */
   76         DEVMETHOD(device_probe,         tdkphy_probe),
   77         DEVMETHOD(device_attach,        tdkphy_attach),
   78         DEVMETHOD(device_detach,        mii_phy_detach),
   79         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   80         { 0, 0 }
   81 };
   82 
   83 static devclass_t tdkphy_devclass;
   84 
   85 static driver_t tdkphy_driver = {
   86         "tdkphy",
   87         tdkphy_methods,
   88         sizeof(struct mii_softc)
   89 };
   90 
   91 DRIVER_MODULE(tdkphy, miibus, tdkphy_driver, tdkphy_devclass, 0, 0);
   92 
   93 static int tdkphy_service(struct mii_softc *, struct mii_data *, int);
   94 static void tdkphy_status(struct mii_softc *);
   95 
   96 static int
   97 tdkphy_probe(device_t dev)
   98 {
   99         struct mii_attach_args *ma;
  100         ma = device_get_ivars(dev);
  101         if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_TDK ||
  102              MII_MODEL(ma->mii_id2) != MII_MODEL_TDK_78Q2120))
  103                 return (ENXIO);
  104 
  105         device_set_desc(dev, MII_STR_TDK_78Q2120);
  106         return (0);
  107 }
  108 
  109 static int
  110 tdkphy_attach(device_t dev)
  111 {
  112         struct mii_softc *sc;
  113         struct mii_attach_args *ma;
  114         struct mii_data *mii;
  115         sc = device_get_softc(dev);
  116         ma = device_get_ivars(dev);
  117         sc->mii_dev = device_get_parent(dev);
  118         mii = device_get_softc(sc->mii_dev);
  119         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  120 
  121         if (bootverbose)
  122                 device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n",
  123                     MII_OUI(ma->mii_id1, ma->mii_id2),
  124                     MII_MODEL(ma->mii_id2), MII_REV(ma->mii_id2));
  125 
  126         sc->mii_inst = mii->mii_instance;
  127         sc->mii_phy = ma->mii_phyno;
  128         sc->mii_service = tdkphy_service;
  129         sc->mii_pdata = mii;
  130 
  131         mii->mii_instance++;
  132 
  133         sc->mii_flags |= MIIF_NOISOLATE;
  134 
  135 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  136 
  137         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
  138             BMCR_ISO);
  139 #if 0
  140         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
  141             BMCR_LOOP|BMCR_S100);
  142 #endif
  143 
  144         mii_phy_reset(sc);
  145 
  146         sc->mii_capabilities =
  147             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  148         device_printf(dev, " ");
  149         mii_add_media(sc);
  150         printf("\n");
  151 #undef ADD
  152 
  153         MIIBUS_MEDIAINIT(sc->mii_dev);
  154 
  155         return(0);
  156 }
  157 
  158 static int
  159 tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  160 {
  161         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  162         int reg;
  163 
  164         switch (cmd) {
  165         case MII_POLLSTAT:
  166                 /*
  167                  * If we're not polling our PHY instance, just return.
  168                  */
  169                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  170                         return (0);
  171                 break;
  172 
  173         case MII_MEDIACHG:
  174                 /*
  175                  * If the media indicates a different PHY instance,
  176                  * isolate ourselves.
  177                  */
  178                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  179                         reg = PHY_READ(sc, MII_BMCR);
  180                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  181                         return (0);
  182                 }
  183 
  184                 /*
  185                  * If the interface is not up, don't do anything.
  186                  */
  187                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  188                         break;
  189 
  190                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  191                 case IFM_AUTO:
  192                         /*
  193                          * If we're already in auto mode, just return.
  194                          */
  195                         if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
  196                                 return (0);
  197                         (void) mii_phy_auto(sc);
  198                         break;
  199                 case IFM_100_T4:
  200                         /*
  201                          * Not supported on MII
  202                          */
  203                         return (EINVAL);
  204                 default:
  205                         /*
  206                          * BMCR data is stored in the ifmedia entry.
  207                          */
  208                         PHY_WRITE(sc, MII_ANAR,
  209                             mii_anar(ife->ifm_media));
  210                         PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
  211                 }
  212                 break;
  213 
  214         case MII_TICK:
  215                 /*
  216                  * If we're not currently selected, just return.
  217                  */
  218                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  219                         return (0);
  220                 if (mii_phy_tick(sc) == EJUSTRETURN)
  221                         return (0);
  222                 break;
  223         }
  224 
  225         /* Update the media status. */
  226         tdkphy_status(sc);
  227         if (sc->mii_pdata->mii_media_active & IFM_FDX)
  228                 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX);
  229         else
  230                 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX);
  231 
  232         /* Callback if something changed. */
  233         mii_phy_update(sc, cmd);
  234         return (0);
  235 }
  236 
  237 static void
  238 tdkphy_status(struct mii_softc *phy)
  239 {
  240         struct mii_data *mii = phy->mii_pdata;
  241         int bmsr, bmcr, anlpar, diag;
  242 
  243         mii->mii_media_status = IFM_AVALID;
  244         mii->mii_media_active = IFM_ETHER;
  245 
  246         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
  247         if (bmsr & BMSR_LINK)
  248                 mii->mii_media_status |= IFM_ACTIVE;
  249 
  250         bmcr = PHY_READ(phy, MII_BMCR);
  251         if (bmcr & BMCR_ISO) {
  252                 mii->mii_media_active |= IFM_NONE;
  253                 mii->mii_media_status = 0;
  254                 return;
  255         }
  256 
  257         if (bmcr & BMCR_LOOP)
  258                 mii->mii_media_active |= IFM_LOOP;
  259 
  260         if (bmcr & BMCR_AUTOEN) {
  261                 /*
  262                  * NWay autonegotiation takes the highest-order common
  263                  * bit of the ANAR and ANLPAR (i.e. best media advertised
  264                  * both by us and our link partner).
  265                  */
  266                 if ((bmsr & BMSR_ACOMP) == 0) {
  267                         /* Erg, still trying, I guess... */
  268                         mii->mii_media_active |= IFM_NONE;
  269                         return;
  270                 }
  271 
  272                 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
  273                 /*
  274                  * ANLPAR doesn't get set on my card, but we check it anyway,
  275                  * since it is mentioned in the 78Q2120 specs.
  276                  */
  277                 if (anlpar & ANLPAR_T4)
  278                         mii->mii_media_active |= IFM_100_T4;
  279                 else if (anlpar & ANLPAR_TX_FD)
  280                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  281                 else if (anlpar & ANLPAR_TX)
  282                         mii->mii_media_active |= IFM_100_TX;
  283                 else if (anlpar & ANLPAR_10_FD)
  284                         mii->mii_media_active |= IFM_10_T|IFM_FDX;
  285                 else if (anlpar & ANLPAR_10)
  286                         mii->mii_media_active |= IFM_10_T;
  287                 else {
  288                         /*
  289                          * ANLPAR isn't set, which leaves two possibilities:
  290                          * 1) Auto negotiation failed
  291                          * 2) Auto negotiation completed, but the card forgot
  292                          *    to set ANLPAR.
  293                          * So we check the MII_DIAG(18) register...
  294                          */
  295                         diag = PHY_READ(phy, MII_DIAG);
  296                         if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */
  297                                 mii->mii_media_active |= IFM_10_T;
  298                         else {
  299                                 if (diag & DIAG_DUPLEX)
  300                                         mii->mii_media_active |= IFM_FDX;
  301                                 if (diag & DIAG_RATE_100)
  302                                         mii->mii_media_active |= IFM_100_TX;
  303                                 else
  304                                         mii->mii_media_active |= IFM_10_T;
  305                         }
  306                 }
  307         } else {
  308                 mii->mii_media_active = mii_media_from_bmcr(bmcr);
  309         }
  310 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/tdkphy.c

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