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.  It's just
   42  * like any other normal phy, except it does auto negotiation in a different
   43  * 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 <machine/clock.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 #if 0
   68 #if !defined(lint)
   69 static const char rcsid[] =
   70   "$Id: tdkphy.c,v 1.3 2000/10/14 06:20:56 jon Exp $";
   71 #endif
   72 #endif
   73 
   74 static int tdkphy_probe(device_t);
   75 static int tdkphy_attach(device_t);
   76 
   77 static device_method_t tdkphy_methods[] = {
   78         /* device interface */
   79         DEVMETHOD(device_probe,         tdkphy_probe),
   80         DEVMETHOD(device_attach,        tdkphy_attach),
   81         DEVMETHOD(device_detach,        mii_phy_detach),
   82         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   83         { 0, 0 }
   84 };
   85 
   86 static devclass_t tdkphy_devclass;
   87 
   88 static driver_t tdkphy_driver = {
   89         "tdkphy",
   90         tdkphy_methods,
   91         sizeof(struct mii_softc)
   92 };
   93 
   94 DRIVER_MODULE(tdkphy, miibus, tdkphy_driver, tdkphy_devclass, 0, 0);
   95 
   96 static int tdkphy_service(struct mii_softc *, struct mii_data *, int);
   97 static void tdkphy_status(struct mii_softc *);
   98 
   99 static int
  100 tdkphy_probe(device_t dev)
  101 {
  102         struct mii_attach_args *ma;
  103         ma = device_get_ivars(dev);
  104         if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_TDK ||
  105              MII_MODEL(ma->mii_id2) != MII_MODEL_TDK_78Q2120))
  106                 return (ENXIO);
  107 
  108         device_set_desc(dev, MII_STR_TDK_78Q2120);
  109         return (0);
  110 }
  111 
  112 static int
  113 tdkphy_attach(device_t dev)
  114 {
  115         struct mii_softc *sc;
  116         struct mii_attach_args *ma;
  117         struct mii_data *mii;
  118         sc = device_get_softc(dev);
  119         ma = device_get_ivars(dev);
  120         sc->mii_dev = device_get_parent(dev);
  121         mii = device_get_softc(sc->mii_dev);
  122         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  123 
  124         if (bootverbose)
  125                 device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n",
  126                     MII_OUI(ma->mii_id1, ma->mii_id2),
  127                     MII_MODEL(ma->mii_id2), MII_REV(ma->mii_id2));
  128 
  129         sc->mii_inst = mii->mii_instance;
  130         sc->mii_phy = ma->mii_phyno;
  131         sc->mii_service = tdkphy_service;
  132         sc->mii_pdata = mii;
  133 
  134         mii->mii_instance++;
  135 
  136         sc->mii_flags |= MIIF_NOISOLATE;
  137 
  138 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  139 
  140         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
  141             BMCR_ISO);
  142 #if 0
  143         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
  144             BMCR_LOOP|BMCR_S100);
  145 #endif
  146 
  147         mii_phy_reset(sc);
  148 
  149         sc->mii_capabilities =
  150             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  151         device_printf(dev, " ");
  152         mii_add_media(sc);
  153         printf("\n");
  154 #undef ADD
  155 
  156         MIIBUS_MEDIAINIT(sc->mii_dev);
  157 
  158         return(0);
  159 }
  160 
  161 static int
  162 tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  163 {
  164         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  165         int reg;
  166 
  167         switch (cmd) {
  168         case MII_POLLSTAT:
  169                 /*
  170                  * If we're not polling our PHY instance, just return.
  171                  */
  172                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  173                         return (0);
  174                 break;
  175 
  176         case MII_MEDIACHG:
  177                 /*
  178                  * If the media indicates a different PHY instance,
  179                  * isolate ourselves.
  180                  */
  181                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  182                         reg = PHY_READ(sc, MII_BMCR);
  183                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  184                         return (0);
  185                 }
  186 
  187                 /*
  188                  * If the interface is not up, don't do anything.
  189                  */
  190                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  191                         break;
  192 
  193                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  194                 case IFM_AUTO:
  195                         /*
  196                          * If we're already in auto mode, just return.
  197                          */
  198                         if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
  199                                 return (0);
  200                         (void) mii_phy_auto(sc);
  201                         break;
  202                 case IFM_100_T4:
  203                         /*
  204                          * Not supported on MII
  205                          */
  206                         return (EINVAL);
  207                 default:
  208                         /*
  209                          * BMCR data is stored in the ifmedia entry.
  210                          */
  211                         PHY_WRITE(sc, MII_ANAR,
  212                             mii_anar(ife->ifm_media));
  213                         PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
  214                 }
  215                 break;
  216 
  217         case MII_TICK:
  218                 /*
  219                  * If we're not currently selected, just return.
  220                  */
  221                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  222                         return (0);
  223                 if (mii_phy_tick(sc) == EJUSTRETURN)
  224                         return (0);
  225                 break;
  226         }
  227 
  228         /* Update the media status. */
  229         tdkphy_status(sc);
  230         if (sc->mii_pdata->mii_media_active & IFM_FDX)
  231                 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX);
  232         else
  233                 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX);
  234 
  235         /* Callback if something changed. */
  236         mii_phy_update(sc, cmd);
  237         return (0);
  238 }
  239 
  240 static void
  241 tdkphy_status(struct mii_softc *phy)
  242 {
  243         struct mii_data *mii = phy->mii_pdata;
  244         int bmsr, bmcr, anlpar, diag;
  245 
  246         mii->mii_media_status = IFM_AVALID;
  247         mii->mii_media_active = IFM_ETHER;
  248 
  249         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
  250         if (bmsr & BMSR_LINK)
  251                 mii->mii_media_status |= IFM_ACTIVE;
  252 
  253         bmcr = PHY_READ(phy, MII_BMCR);
  254         if (bmcr & BMCR_ISO) {
  255                 mii->mii_media_active |= IFM_NONE;
  256                 mii->mii_media_status = 0;
  257                 return;
  258         }
  259 
  260         if (bmcr & BMCR_LOOP)
  261                 mii->mii_media_active |= IFM_LOOP;
  262 
  263         if (bmcr & BMCR_AUTOEN) {
  264                 /*
  265                  * NWay autonegotiation takes the highest-order common
  266                  * bit of the ANAR and ANLPAR (i.e. best media advertised
  267                  * both by us and our link partner).
  268                  */
  269                 if ((bmsr & BMSR_ACOMP) == 0) {
  270                         /* Erg, still trying, I guess... */
  271                         mii->mii_media_active |= IFM_NONE;
  272                         return;
  273                 }
  274 
  275                 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR);
  276                 /*
  277                  * ANLPAR doesn't get set on my card, but we check it anyway,
  278                  * since it is mentioned in the 78Q2120 specs.
  279                  */
  280                 if (anlpar & ANLPAR_T4)
  281                         mii->mii_media_active |= IFM_100_T4;
  282                 else if (anlpar & ANLPAR_TX_FD)
  283                         mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  284                 else if (anlpar & ANLPAR_TX)
  285                         mii->mii_media_active |= IFM_100_TX;
  286                 else if (anlpar & ANLPAR_10_FD)
  287                         mii->mii_media_active |= IFM_10_T|IFM_FDX;
  288                 else if (anlpar & ANLPAR_10)
  289                         mii->mii_media_active |= IFM_10_T;
  290                 else {
  291                         /*
  292                          * ANLPAR isn't set, which leaves two possibilities:
  293                          * 1) Auto negotiation failed
  294                          * 2) Auto negotiation completed, but the card forgot
  295                          *    to set ANLPAR.
  296                          * So we check the MII_DIAG(18) register...
  297                          */
  298                         diag = PHY_READ(phy, MII_DIAG);
  299                         if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */
  300                                 mii->mii_media_active |= IFM_10_T;
  301                         else {
  302                                 if (diag & DIAG_DUPLEX)
  303                                         mii->mii_media_active |= IFM_FDX;
  304                                 if (diag & DIAG_RATE_100)
  305                                         mii->mii_media_active |= IFM_100_TX;
  306                                 else
  307                                         mii->mii_media_active |= IFM_10_T;
  308                         }
  309                 }
  310         } else {
  311                 mii->mii_media_active = mii_media_from_bmcr(bmcr);
  312         }
  313 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/tdkphy.c

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