mii_physubr.c

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    1 /*      $NetBSD: mii_physubr.c,v 1.5 1999/08/03 19:41:49 drochner Exp $ */
    2 
    3 /*-
    4  * Copyright (c) 1998, 1999, 2000, 2001 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  * 3. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *      This product includes software developed by the NetBSD
   22  *      Foundation, Inc. and its contributors.
   23  * 4. Neither the name of The NetBSD Foundation nor the names of its
   24  *    contributors may be used to endorse or promote products derived
   25  *    from this software without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   37  * POSSIBILITY OF SUCH DAMAGE.
   38  */
   39 
   40 #include <sys/cdefs.h>
   41 __FBSDID("$FreeBSD: releng/6.0/sys/dev/mii/mii_physubr.c 141937 2005-02-15 06:02:34Z imp $");
   42 
   43 /*
   44  * Subroutines common to all PHYs.
   45  */
   46 
   47 #include <sys/param.h>
   48 #include <sys/systm.h>
   49 #include <sys/kernel.h>
   50 #include <sys/socket.h>
   51 #include <sys/errno.h>
   52 #include <sys/module.h>
   53 #include <sys/bus.h>
   54 
   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 
   62 #include "miibus_if.h"
   63 
   64 /*
   65  * Media to register setting conversion table.  Order matters.
   66  */
   67 const struct mii_media mii_media_table[MII_NMEDIA] = {
   68         /* None */
   69         { BMCR_ISO,             ANAR_CSMA,
   70           0, },
   71 
   72         /* 10baseT */
   73         { BMCR_S10,             ANAR_CSMA|ANAR_10,
   74           0, },
   75 
   76         /* 10baseT-FDX */
   77         { BMCR_S10|BMCR_FDX,    ANAR_CSMA|ANAR_10_FD,
   78           0, },
   79 
   80         /* 100baseT4 */
   81         { BMCR_S100,            ANAR_CSMA|ANAR_T4,
   82           0, },
   83 
   84         /* 100baseTX */
   85         { BMCR_S100,            ANAR_CSMA|ANAR_TX,
   86           0, },
   87 
   88         /* 100baseTX-FDX */
   89         { BMCR_S100|BMCR_FDX,   ANAR_CSMA|ANAR_TX_FD,
   90           0, },
   91 
   92         /* 1000baseX */
   93         { BMCR_S1000,           ANAR_CSMA,
   94           0, },
   95 
   96         /* 1000baseX-FDX */
   97         { BMCR_S1000|BMCR_FDX,  ANAR_CSMA,
   98           0, },
   99 
  100         /* 1000baseT */
  101         { BMCR_S1000,           ANAR_CSMA,
  102           GTCR_ADV_1000THDX },
  103 
  104         /* 1000baseT-FDX */
  105         { BMCR_S1000,           ANAR_CSMA,
  106           GTCR_ADV_1000TFDX },
  107 };
  108 
  109 void
  110 mii_phy_setmedia(struct mii_softc *sc)
  111 {
  112         struct mii_data *mii = sc->mii_pdata;
  113         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  114         int bmcr, anar, gtcr;
  115 
  116         if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO) {
  117                 if ((PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) == 0)
  118                         (void) mii_phy_auto(sc);
  119                 return;
  120         }
  121 
  122         /*
  123          * Table index is stored in the media entry.
  124          */
  125 
  126         KASSERT(ife->ifm_data >=0 && ife->ifm_data < MII_NMEDIA,
  127             ("invalid ife->ifm_data (0x%x) in mii_phy_setmedia",
  128             ife->ifm_data));
  129 
  130         anar = mii_media_table[ife->ifm_data].mm_anar;
  131         bmcr = mii_media_table[ife->ifm_data].mm_bmcr;
  132         gtcr = mii_media_table[ife->ifm_data].mm_gtcr;
  133 
  134         if (mii->mii_media.ifm_media & IFM_ETH_MASTER) {
  135                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  136                 case IFM_1000_T:
  137                         gtcr |= GTCR_MAN_MS|GTCR_ADV_MS;
  138                         break;
  139 
  140                 default:
  141                         panic("mii_phy_setmedia: MASTER on wrong media");
  142                 }
  143         }
  144 
  145         if (ife->ifm_media & IFM_LOOP)
  146                 bmcr |= BMCR_LOOP;
  147 
  148         PHY_WRITE(sc, MII_ANAR, anar);
  149         PHY_WRITE(sc, MII_BMCR, bmcr);
  150         if (sc->mii_flags & MIIF_HAVE_GTCR)
  151                 PHY_WRITE(sc, MII_100T2CR, gtcr);
  152 }
  153 
  154 int
  155 mii_phy_auto(struct mii_softc *sc)
  156 {
  157 
  158         /*
  159          * Check for 1000BASE-X.  Autonegotiation is a bit
  160          * different on such devices.
  161          */
  162         if (sc->mii_flags & MIIF_IS_1000X) {
  163                 uint16_t anar = 0;
  164 
  165                 if (sc->mii_extcapabilities & EXTSR_1000XFDX)
  166                         anar |= ANAR_X_FD;
  167                 if (sc->mii_extcapabilities & EXTSR_1000XHDX)
  168                         anar |= ANAR_X_HD;
  169 
  170                 if (sc->mii_flags & MIIF_DOPAUSE) {
  171                         /* XXX Asymmetric vs. symmetric? */
  172                         anar |= ANLPAR_X_PAUSE_TOWARDS;
  173                 }
  174 
  175                 PHY_WRITE(sc, MII_ANAR, anar);
  176         } else {
  177                 uint16_t anar;
  178 
  179                 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) |
  180                     ANAR_CSMA;
  181                 if (sc->mii_flags & MIIF_DOPAUSE)
  182                         anar |= ANAR_FC;
  183                 PHY_WRITE(sc, MII_ANAR, anar);
  184                 if (sc->mii_flags & MIIF_HAVE_GTCR) {
  185                         uint16_t gtcr = 0;
  186 
  187                         if (sc->mii_extcapabilities & EXTSR_1000TFDX)
  188                                 gtcr |= GTCR_ADV_1000TFDX;
  189                         if (sc->mii_extcapabilities & EXTSR_1000THDX)
  190                                 gtcr |= GTCR_ADV_1000THDX;
  191 
  192                         PHY_WRITE(sc, MII_100T2CR, gtcr);
  193                 }
  194         }
  195         PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
  196         return (EJUSTRETURN);
  197 }
  198 
  199 int
  200 mii_phy_tick(struct mii_softc *sc)
  201 {
  202         struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur;
  203         struct ifnet *ifp = sc->mii_pdata->mii_ifp;
  204         int reg;
  205 
  206         /* Just bail now if the interface is down. */
  207         if ((ifp->if_flags & IFF_UP) == 0)
  208                 return (EJUSTRETURN);
  209 
  210         /*
  211          * If we're not doing autonegotiation, we don't need to do
  212          * any extra work here.  However, we need to check the link
  213          * status so we can generate an announcement if the status
  214          * changes.
  215          */
  216         if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
  217                 return (0);
  218 
  219         /* Read the status register twice; BMSR_LINK is latch-low. */
  220         reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  221         if (reg & BMSR_LINK) {
  222                 /*
  223                  * See above.
  224                  */
  225                 return (0);
  226         }
  227 
  228         /*
  229          * Only retry autonegotiation every N seconds.
  230          */
  231         if (sc->mii_anegticks == 0) {
  232                 sc->mii_anegticks = 17;
  233                 return (0);
  234         }
  235         if (++sc->mii_ticks <= sc->mii_anegticks)
  236                 return (EJUSTRETURN);
  237 
  238         sc->mii_ticks = 0;
  239         mii_phy_reset(sc);
  240         mii_phy_auto(sc);
  241         return (0);
  242 }
  243 
  244 void
  245 mii_phy_reset(struct mii_softc *sc)
  246 {
  247         int reg, i;
  248 
  249         if (sc->mii_flags & MIIF_NOISOLATE)
  250                 reg = BMCR_RESET;
  251         else
  252                 reg = BMCR_RESET | BMCR_ISO;
  253         PHY_WRITE(sc, MII_BMCR, reg);
  254 
  255         /* Wait 100ms for it to complete. */
  256         for (i = 0; i < 100; i++) {
  257                 reg = PHY_READ(sc, MII_BMCR); 
  258                 if ((reg & BMCR_RESET) == 0)
  259                         break;
  260                 DELAY(1000);
  261         }
  262 
  263         if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0))
  264                 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  265 }
  266 
  267 void
  268 mii_phy_down(struct mii_softc *sc)
  269 {
  270 
  271 }
  272 
  273 void
  274 mii_phy_update(struct mii_softc *sc, int cmd)
  275 {
  276         struct mii_data *mii = sc->mii_pdata;
  277 
  278         if (sc->mii_media_active != mii->mii_media_active ||
  279             cmd == MII_MEDIACHG) {
  280                 MIIBUS_STATCHG(sc->mii_dev);
  281                 sc->mii_media_active = mii->mii_media_active;
  282         }
  283         if (sc->mii_media_status != mii->mii_media_status) {
  284                 MIIBUS_LINKCHG(sc->mii_dev);
  285                 sc->mii_media_status = mii->mii_media_status;
  286         }
  287 }
  288 
  289 /*
  290  * Given an ifmedia word, return the corresponding ANAR value.
  291  */
  292 int
  293 mii_anar(int media)
  294 {
  295         int rv;
  296 
  297         switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) {
  298         case IFM_ETHER|IFM_10_T:
  299                 rv = ANAR_10|ANAR_CSMA;
  300                 break;
  301         case IFM_ETHER|IFM_10_T|IFM_FDX:
  302                 rv = ANAR_10_FD|ANAR_CSMA;
  303                 break;
  304         case IFM_ETHER|IFM_100_TX:
  305                 rv = ANAR_TX|ANAR_CSMA;
  306                 break;
  307         case IFM_ETHER|IFM_100_TX|IFM_FDX:
  308                 rv = ANAR_TX_FD|ANAR_CSMA;
  309                 break;
  310         case IFM_ETHER|IFM_100_T4:
  311                 rv = ANAR_T4|ANAR_CSMA;
  312                 break;
  313         default:
  314                 rv = 0;
  315                 break;
  316         }
  317 
  318         return (rv);
  319 }
  320 
  321 /*
  322  * Given a BMCR value, return the corresponding ifmedia word.
  323  */
  324 int
  325 mii_media_from_bmcr(int bmcr)
  326 {
  327         int rv = IFM_ETHER;
  328 
  329         if (bmcr & BMCR_S100)
  330                 rv |= IFM_100_TX;
  331         else
  332                 rv |= IFM_10_T;
  333         if (bmcr & BMCR_FDX)
  334                 rv |= IFM_FDX;
  335 
  336         return (rv);
  337 }
  338 
  339 /*
  340  * Initialize generic PHY media based on BMSR, called when a PHY is
  341  * attached.  We expect to be set up to print a comma-separated list
  342  * of media names.  Does not print a newline.
  343  */
  344 void
  345 mii_add_media(struct mii_softc *sc)
  346 {
  347         const char *sep = "";
  348         struct mii_data *mii;
  349 
  350         mii = device_get_softc(sc->mii_dev);
  351         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) {
  352                 printf("no media present");
  353                 return;
  354         }
  355 
  356 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  357 #define PRINT(s)        printf("%s%s", sep, s); sep = ", "
  358 
  359         if (sc->mii_capabilities & BMSR_10THDX) {
  360                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst), 0);
  361                 PRINT("10baseT");
  362         }
  363         if (sc->mii_capabilities & BMSR_10TFDX) {
  364                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst),
  365                     BMCR_FDX);
  366                 PRINT("10baseT-FDX");
  367         }
  368         if (sc->mii_capabilities & BMSR_100TXHDX) {
  369                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst),
  370                     BMCR_S100);
  371                 PRINT("100baseTX");
  372         }
  373         if (sc->mii_capabilities & BMSR_100TXFDX) {
  374                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst),
  375                     BMCR_S100|BMCR_FDX);
  376                 PRINT("100baseTX-FDX");
  377         }
  378         if (sc->mii_capabilities & BMSR_100T4) {
  379                 /*
  380                  * XXX How do you enable 100baseT4?  I assume we set
  381                  * XXX BMCR_S100 and then assume the PHYs will take
  382                  * XXX watever action is necessary to switch themselves
  383                  * XXX into T4 mode.
  384                  */
  385                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst),
  386                     BMCR_S100);
  387                 PRINT("100baseT4");
  388         }
  389         if (sc->mii_capabilities & BMSR_ANEG) {
  390                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst),
  391                     BMCR_AUTOEN);
  392                 PRINT("auto");
  393         }
  394 
  395 
  396 
  397 #undef ADD
  398 #undef PRINT
  399 }
  400 
  401 /*
  402  * Initialize generic PHY media based on BMSR, called when a PHY is
  403  * attached.  We expect to be set up to print a comma-separated list
  404  * of media names.  Does not print a newline.
  405  */
  406 void
  407 mii_phy_add_media(struct mii_softc *sc)
  408 {
  409         struct mii_data *mii = sc->mii_pdata;
  410         const char *sep = "";
  411 
  412 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  413 #define PRINT(s)        printf("%s%s", sep, s); sep = ", "
  414 
  415         if ((sc->mii_flags & MIIF_NOISOLATE) == 0)
  416                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
  417                     MII_MEDIA_NONE);
  418 
  419         /*
  420          * There are different interpretations for the bits in
  421          * HomePNA PHYs.  And there is really only one media type
  422          * that is supported.
  423          */
  424         if (sc->mii_flags & MIIF_IS_HPNA) {
  425                 if (sc->mii_capabilities & BMSR_10THDX) {
  426                         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_HPNA_1, 0,
  427                                          sc->mii_inst),
  428                             MII_MEDIA_10_T);
  429                         PRINT("HomePNA1");
  430                 }
  431                 return;
  432         }
  433 
  434         if (sc->mii_capabilities & BMSR_10THDX) {
  435                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst),
  436                     MII_MEDIA_10_T);
  437                 PRINT("10baseT");
  438         }
  439         if (sc->mii_capabilities & BMSR_10TFDX) {
  440                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst),
  441                     MII_MEDIA_10_T_FDX);
  442                 PRINT("10baseT-FDX");
  443         }
  444         if (sc->mii_capabilities & BMSR_100TXHDX) {
  445                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst),
  446                     MII_MEDIA_100_TX);
  447                 PRINT("100baseTX");
  448         }
  449         if (sc->mii_capabilities & BMSR_100TXFDX) {
  450                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst),
  451                     MII_MEDIA_100_TX_FDX);
  452                 PRINT("100baseTX-FDX");
  453         }
  454         if (sc->mii_capabilities & BMSR_100T4) {
  455                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst),
  456                     MII_MEDIA_100_T4);
  457                 PRINT("100baseT4");
  458         }
  459 
  460         if (sc->mii_extcapabilities & EXTSR_MEDIAMASK) {
  461                 /*
  462                  * XXX Right now only handle 1000SX and 1000TX.  Need
  463                  * XXX to handle 1000LX and 1000CX some how.
  464                  *
  465                  * Note since it can take 5 seconds to auto-negotiate
  466                  * a gigabit link, we make anegticks 10 seconds for
  467                  * all the gigabit media types.
  468                  */
  469                 if (sc->mii_extcapabilities & EXTSR_1000XHDX) {
  470                         sc->mii_anegticks = 17;
  471                         sc->mii_flags |= MIIF_IS_1000X;
  472                         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0,
  473                             sc->mii_inst), MII_MEDIA_1000_X);
  474                         PRINT("1000baseSX");
  475                 }
  476                 if (sc->mii_extcapabilities & EXTSR_1000XFDX) {
  477                         sc->mii_anegticks = 17;
  478                         sc->mii_flags |= MIIF_IS_1000X;
  479                         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX,
  480                             sc->mii_inst), MII_MEDIA_1000_X_FDX);
  481                         PRINT("1000baseSX-FDX");
  482                 }
  483 
  484                 /*
  485                  * 1000baseT media needs to be able to manipulate
  486                  * master/slave mode.  We set IFM_ETH_MASTER in
  487                  * the "don't care mask" and filter it out when
  488                  * the media is set.
  489                  *
  490                  * All 1000baseT PHYs have a 1000baseT control register.
  491                  */
  492                 if (sc->mii_extcapabilities & EXTSR_1000THDX) {
  493                         sc->mii_anegticks = 17;
  494                         sc->mii_flags |= MIIF_HAVE_GTCR;
  495                         mii->mii_media.ifm_mask |= IFM_ETH_MASTER;
  496                         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 0,
  497                             sc->mii_inst), MII_MEDIA_1000_T);
  498                         PRINT("1000baseT");
  499                 }
  500                 if (sc->mii_extcapabilities & EXTSR_1000TFDX) {
  501                         sc->mii_anegticks = 17;
  502                         sc->mii_flags |= MIIF_HAVE_GTCR;
  503                         mii->mii_media.ifm_mask |= IFM_ETH_MASTER;
  504                         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX,
  505                             sc->mii_inst), MII_MEDIA_1000_T_FDX);
  506                         PRINT("1000baseT-FDX");
  507                 }
  508         }
  509 
  510         if (sc->mii_capabilities & BMSR_ANEG) {
  511                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst),
  512                     MII_NMEDIA);        /* intentionally invalid index */
  513                 PRINT("auto");
  514         }
  515 #undef ADD
  516 #undef PRINT
  517 }
  518 
  519 int
  520 mii_phy_detach(device_t dev)
  521 {
  522         struct mii_softc *sc;
  523 
  524         sc = device_get_softc(dev);
  525         mii_phy_down(sc);
  526         sc->mii_dev = NULL;
  527         LIST_REMOVE(sc, mii_list);
  528 
  529         return(0);
  530 }
  531 
  532 const struct mii_phydesc *
  533 mii_phy_match(const struct mii_attach_args *ma, const struct mii_phydesc *mpd)
  534 {
  535 
  536         for (; mpd->mpd_name != NULL; mpd++) {
  537                 if (MII_OUI(ma->mii_id1, ma->mii_id2) == mpd->mpd_oui &&
  538                     MII_MODEL(ma->mii_id2) == mpd->mpd_model)
  539                         return (mpd);
  540         }
  541         return (NULL);
  542 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/mii_physubr.c

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sys/dev/mii/mii_physubr.c
