tlphy.c

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    1 /*      $NetBSD: tlphy.c,v 1.18 1999/05/14 11:40:28 drochner Exp $      */
    2 
    3 /*-
    4  * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
    9  * NASA Ames Research Center.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   30  * POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 /*-
   34  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  *
   45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   46  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   47  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   48  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   49  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   50  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   51  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   52  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   53  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   54  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   55  */
   56 
   57 #include <sys/cdefs.h>
   58 __FBSDID("$FreeBSD$");
   59 
   60 /*
   61  * Driver for Texas Instruments's ThunderLAN PHYs
   62  */
   63 
   64 #include <sys/param.h>
   65 #include <sys/systm.h>
   66 #include <sys/kernel.h>
   67 #include <sys/socket.h>
   68 #include <sys/errno.h>
   69 #include <sys/module.h>
   70 #include <sys/bus.h>
   71 #include <sys/malloc.h>
   72 
   73 #include <machine/bus.h>
   74 
   75 #include <net/if.h>
   76 #include <net/if_media.h>
   77 
   78 #include <dev/mii/mii.h>
   79 #include <dev/mii/miivar.h>
   80 #include "miidevs.h"
   81 
   82 #include <dev/mii/tlphyreg.h>
   83 
   84 #include "miibus_if.h"
   85 
   86 struct tlphy_softc {
   87         struct mii_softc sc_mii;                /* generic PHY */
   88         int sc_need_acomp;
   89 };
   90 
   91 static int tlphy_probe(device_t);
   92 static int tlphy_attach(device_t);
   93 
   94 static device_method_t tlphy_methods[] = {
   95         /* device interface */
   96         DEVMETHOD(device_probe,         tlphy_probe),
   97         DEVMETHOD(device_attach,        tlphy_attach),
   98         DEVMETHOD(device_detach,        mii_phy_detach),
   99         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  100         DEVMETHOD_END
  101 };
  102 
  103 static devclass_t tlphy_devclass;
  104 
  105 static driver_t tlphy_driver = {
  106         "tlphy",
  107         tlphy_methods,
  108         sizeof(struct tlphy_softc)
  109 };
  110 
  111 DRIVER_MODULE(tlphy, miibus, tlphy_driver, tlphy_devclass, 0, 0);
  112 
  113 static int      tlphy_service(struct mii_softc *, struct mii_data *, int);
  114 static int      tlphy_auto(struct tlphy_softc *);
  115 static void     tlphy_acomp(struct tlphy_softc *);
  116 static void     tlphy_status(struct mii_softc *);
  117 
  118 static const struct mii_phydesc tlphys[] = {
  119         MII_PHY_DESC(TI, TLAN10T),
  120         MII_PHY_END
  121 };
  122 
  123 static const struct mii_phy_funcs tlphy_funcs = {
  124         tlphy_service,
  125         tlphy_status,
  126         mii_phy_reset
  127 };
  128 
  129 static int
  130 tlphy_probe(device_t dev)
  131 {
  132 
  133         if (strcmp(device_get_name(device_get_parent(device_get_parent(dev))),
  134             "tl") != 0)
  135                 return (ENXIO);
  136         return (mii_phy_dev_probe(dev, tlphys, BUS_PROBE_DEFAULT));
  137 }
  138 
  139 static int
  140 tlphy_attach(device_t dev)
  141 {
  142         device_t *devlist;
  143         struct mii_softc *other, *sc_mii;
  144         const char *sep = "";
  145         int capmask, devs, i;
  146 
  147         sc_mii = device_get_softc(dev);
  148 
  149         mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &tlphy_funcs, 0);
  150 
  151         /*
  152          * Note that if we're on a device that also supports 100baseTX,
  153          * we are not going to want to use the built-in 10baseT port,
  154          * since there will be another PHY on the MII wired up to the
  155          * UTP connector.
  156          */
  157         capmask = BMSR_DEFCAPMASK;
  158         if (sc_mii->mii_inst &&
  159             device_get_children(sc_mii->mii_dev, &devlist, &devs) == 0) {
  160                 for (i = 0; i < devs; i++) {
  161                         if (devlist[i] != dev) {
  162                                 other = device_get_softc(devlist[i]);
  163                                 capmask &= ~other->mii_capabilities;
  164                                 break;
  165                         }
  166                 }
  167                 free(devlist, M_TEMP);
  168         }
  169 
  170         PHY_RESET(sc_mii);
  171 
  172         sc_mii->mii_capabilities = PHY_READ(sc_mii, MII_BMSR) & capmask;
  173 
  174 #define ADD(m, c)                                                       \
  175     ifmedia_add(&sc_mii->mii_pdata->mii_media, (m), (c), NULL)
  176 #define PRINT(s)        printf("%s%s", sep, s); sep = ", "
  177 
  178         if ((sc_mii->mii_flags & (MIIF_MACPRIV0 | MIIF_MACPRIV1)) != 0 &&
  179             (sc_mii->mii_capabilities & BMSR_MEDIAMASK) != 0)
  180                 device_printf(dev, " ");
  181         if ((sc_mii->mii_flags & MIIF_MACPRIV0) != 0) {
  182                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_2, 0, sc_mii->mii_inst),
  183                     0);
  184                 PRINT("10base2/BNC");
  185         }
  186         if ((sc_mii->mii_flags & MIIF_MACPRIV1) != 0) {
  187                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, sc_mii->mii_inst),
  188                     0);
  189                 PRINT("10base5/AUI");
  190         }
  191         if ((sc_mii->mii_capabilities & BMSR_MEDIAMASK) != 0) {
  192                 printf("%s", sep);
  193                 mii_phy_add_media(sc_mii);
  194         }
  195         if ((sc_mii->mii_flags & (MIIF_MACPRIV0 | MIIF_MACPRIV1)) != 0 &&
  196             (sc_mii->mii_capabilities & BMSR_MEDIAMASK) != 0)
  197                 printf("\n");
  198 #undef ADD
  199 #undef PRINT
  200 
  201         MIIBUS_MEDIAINIT(sc_mii->mii_dev);
  202         return (0);
  203 }
  204 
  205 static int
  206 tlphy_service(struct mii_softc *self, struct mii_data *mii, int cmd)
  207 {
  208         struct tlphy_softc *sc = (struct tlphy_softc *)self;
  209         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  210         int reg;
  211 
  212         if (sc->sc_need_acomp)
  213                 tlphy_acomp(sc);
  214 
  215         switch (cmd) {
  216         case MII_POLLSTAT:
  217                 break;
  218 
  219         case MII_MEDIACHG:
  220                 /*
  221                  * If the interface is not up, don't do anything.
  222                  */
  223                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  224                         break;
  225 
  226                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  227                 case IFM_AUTO:
  228                         /*
  229                          * The ThunderLAN PHY doesn't self-configure after
  230                          * an autonegotiation cycle, so there's no such
  231                          * thing as "already in auto mode".
  232                          */
  233                         (void)tlphy_auto(sc);
  234                         break;
  235                 case IFM_10_2:
  236                 case IFM_10_5:
  237                         PHY_WRITE(&sc->sc_mii, MII_BMCR, 0);
  238                         PHY_WRITE(&sc->sc_mii, MII_TLPHY_CTRL, CTRL_AUISEL);
  239                         DELAY(100000);
  240                         break;
  241                 default:
  242                         PHY_WRITE(&sc->sc_mii, MII_TLPHY_CTRL, 0);
  243                         DELAY(100000);
  244                         mii_phy_setmedia(&sc->sc_mii);
  245                 }
  246                 break;
  247 
  248         case MII_TICK:
  249                 /*
  250                  * Is the interface even up?
  251                  */
  252                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  253                         return (0);
  254 
  255                 /*
  256                  * Only used for autonegotiation.
  257                  */
  258                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
  259                         break;
  260 
  261                 /*
  262                  * Check to see if we have link.  If we do, we don't
  263                  * need to restart the autonegotiation process.  Read
  264                  * the BMSR twice in case it's latched.
  265                  *
  266                  * XXX WHAT ABOUT CHECKING LINK ON THE BNC/AUI?!
  267                  */
  268                 reg = PHY_READ(&sc->sc_mii, MII_BMSR) |
  269                     PHY_READ(&sc->sc_mii, MII_BMSR);
  270                 if (reg & BMSR_LINK)
  271                         break;
  272 
  273                 /*
  274                  * Only retry autonegotiation every 5 seconds.
  275                  */
  276                 if (++sc->sc_mii.mii_ticks <= MII_ANEGTICKS)
  277                         break;
  278 
  279                 sc->sc_mii.mii_ticks = 0;
  280                 PHY_RESET(&sc->sc_mii);
  281                 (void)tlphy_auto(sc);
  282                 return (0);
  283         }
  284 
  285         /* Update the media status. */
  286         PHY_STATUS(self);
  287 
  288         /* Callback if something changed. */
  289         mii_phy_update(&sc->sc_mii, cmd);
  290         return (0);
  291 }
  292 
  293 static void
  294 tlphy_status(struct mii_softc *self)
  295 {
  296         struct tlphy_softc *sc = (struct tlphy_softc *)self;
  297         struct mii_data *mii = sc->sc_mii.mii_pdata;
  298         int bmsr, bmcr, tlctrl;
  299 
  300         mii->mii_media_status = IFM_AVALID;
  301         mii->mii_media_active = IFM_ETHER;
  302 
  303         bmcr = PHY_READ(&sc->sc_mii, MII_BMCR);
  304         if (bmcr & BMCR_ISO) {
  305                 mii->mii_media_active |= IFM_NONE;
  306                 mii->mii_media_status = 0;
  307                 return;
  308         }
  309 
  310         tlctrl = PHY_READ(&sc->sc_mii, MII_TLPHY_CTRL);
  311         if (tlctrl & CTRL_AUISEL) {
  312                 mii->mii_media_status = 0;
  313                 mii->mii_media_active = mii->mii_media.ifm_cur->ifm_media;
  314                 return;
  315         }
  316 
  317         bmsr = PHY_READ(&sc->sc_mii, MII_BMSR) |
  318             PHY_READ(&sc->sc_mii, MII_BMSR);
  319         if (bmsr & BMSR_LINK)
  320                 mii->mii_media_status |= IFM_ACTIVE;
  321 
  322         if (bmcr & BMCR_LOOP)
  323                 mii->mii_media_active |= IFM_LOOP;
  324 
  325         /*
  326          * Grr, braindead ThunderLAN PHY doesn't have any way to
  327          * tell which media is actually active.  (Note it also
  328          * doesn't self-configure after autonegotiation.)  We
  329          * just have to report what's in the BMCR.
  330          */
  331         if (bmcr & BMCR_FDX)
  332                 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(self);
  333         else
  334                 mii->mii_media_active |= IFM_HDX;
  335         mii->mii_media_active |= IFM_10_T;
  336 }
  337 
  338 static int
  339 tlphy_auto(struct tlphy_softc *sc)
  340 {
  341         int error;
  342 
  343         switch ((error = mii_phy_auto(&sc->sc_mii))) {
  344         case EIO:
  345                 /*
  346                  * Just assume we're not in full-duplex mode.
  347                  * XXX Check link and try AUI/BNC?
  348                  */
  349                 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0);
  350                 break;
  351 
  352         case EJUSTRETURN:
  353                 /* Flag that we need to program when it completes. */
  354                 sc->sc_need_acomp = 1;
  355                 break;
  356 
  357         default:
  358                 tlphy_acomp(sc);
  359         }
  360 
  361         return (error);
  362 }
  363 
  364 static void
  365 tlphy_acomp(struct tlphy_softc *sc)
  366 {
  367         int aner, anlpar;
  368 
  369         sc->sc_need_acomp = 0;
  370 
  371         /*
  372          * Grr, braindead ThunderLAN PHY doesn't self-configure
  373          * after autonegotiation.  We have to do it ourselves
  374          * based on the link partner status.
  375          */
  376 
  377         aner = PHY_READ(&sc->sc_mii, MII_ANER);
  378         if (aner & ANER_LPAN) {
  379                 anlpar = PHY_READ(&sc->sc_mii, MII_ANLPAR) &
  380                     PHY_READ(&sc->sc_mii, MII_ANAR);
  381                 if (anlpar & ANAR_10_FD) {
  382                         PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_FDX);
  383                         return;
  384                 }
  385         }
  386         PHY_WRITE(&sc->sc_mii, MII_BMCR, 0);
  387 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/tlphy.c

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