The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/ip1000phy.c

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    1 /*-
    2  * Copyright (c) 2006, Pyun YongHyeon <yongari@FreeBSD.org>
    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 unmodified, this list of conditions, and the following
   10  *    disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 /*
   33  * Driver for the IC Plus IP1000A/IP1001 10/100/1000 PHY.
   34  */
   35 
   36 #include <sys/param.h>
   37 #include <sys/systm.h>
   38 #include <sys/kernel.h>
   39 #include <sys/module.h>
   40 #include <sys/socket.h>
   41 #include <sys/bus.h>
   42 
   43 #include <net/if.h>
   44 #include <net/if_media.h>
   45 
   46 #include <dev/mii/mii.h>
   47 #include <dev/mii/miivar.h>
   48 #include "miidevs.h"
   49 
   50 #include <dev/mii/ip1000phyreg.h>
   51 
   52 #include "miibus_if.h"
   53 
   54 #include <machine/bus.h>
   55 #include <dev/stge/if_stgereg.h>
   56 
   57 static int ip1000phy_probe(device_t);
   58 static int ip1000phy_attach(device_t);
   59 
   60 struct ip1000phy_softc {
   61         struct mii_softc mii_sc;
   62         int model;
   63         int revision;
   64 };
   65 
   66 static device_method_t ip1000phy_methods[] = {
   67         /* device interface */
   68         DEVMETHOD(device_probe,         ip1000phy_probe),
   69         DEVMETHOD(device_attach,        ip1000phy_attach),
   70         DEVMETHOD(device_detach,        mii_phy_detach),
   71         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   72         { 0, 0 }
   73 };
   74 
   75 static devclass_t ip1000phy_devclass;
   76 static driver_t ip1000phy_driver = {
   77         "ip1000phy",
   78         ip1000phy_methods,
   79         sizeof (struct mii_softc)
   80 };
   81 
   82 DRIVER_MODULE(ip1000phy, miibus, ip1000phy_driver, ip1000phy_devclass, 0, 0);
   83 
   84 static int      ip1000phy_service(struct mii_softc *, struct mii_data *, int);
   85 static void     ip1000phy_status(struct mii_softc *);
   86 static void     ip1000phy_reset(struct mii_softc *);
   87 static int      ip1000phy_mii_phy_auto(struct mii_softc *);
   88 
   89 static const struct mii_phydesc ip1000phys[] = {
   90         MII_PHY_DESC(ICPLUS, IP1000A),
   91         MII_PHY_DESC(ICPLUS, IP1001),
   92         MII_PHY_END
   93 };
   94 
   95 static int
   96 ip1000phy_probe(device_t dev)
   97 {
   98 
   99         return (mii_phy_dev_probe(dev, ip1000phys, BUS_PROBE_DEFAULT));
  100 }
  101 
  102 static int
  103 ip1000phy_attach(device_t dev)
  104 {
  105         struct ip1000phy_softc *isc;
  106         struct mii_softc *sc;
  107         struct mii_attach_args *ma;
  108         struct mii_data *mii;
  109 
  110         isc = device_get_softc(dev);
  111         sc = &isc->mii_sc;
  112         ma = device_get_ivars(dev);
  113         sc->mii_dev = device_get_parent(dev);
  114         mii = device_get_softc(sc->mii_dev);
  115         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  116 
  117         sc->mii_inst = mii->mii_instance;
  118         sc->mii_phy = ma->mii_phyno;
  119         sc->mii_service = ip1000phy_service;
  120         sc->mii_pdata = mii;
  121         sc->mii_flags |= MIIF_NOISOLATE;
  122 
  123         mii->mii_instance++;
  124 
  125         isc->model = MII_MODEL(ma->mii_id2);
  126         isc->revision = MII_REV(ma->mii_id2);
  127 
  128         sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  129         if (sc->mii_capabilities & BMSR_EXTSTAT)
  130                 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
  131         device_printf(dev, " ");
  132 
  133         ip1000phy_reset(sc);
  134         mii_phy_add_media(sc);
  135         printf("\n");
  136 
  137         MIIBUS_MEDIAINIT(sc->mii_dev);
  138         return(0);
  139 }
  140 
  141 static int
  142 ip1000phy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  143 {
  144         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  145         uint32_t gig, reg, speed;
  146 
  147         switch (cmd) {
  148         case MII_POLLSTAT:
  149                 /*
  150                  * If we're not polling our PHY instance, just return.
  151                  */
  152                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  153                         return (0);
  154                 break;
  155 
  156         case MII_MEDIACHG:
  157                 /*
  158                  * If the media indicates a different PHY instance,
  159                  * isolate ourselves.
  160                  */
  161                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  162                         reg = PHY_READ(sc, IP1000PHY_MII_BMCR);
  163                         PHY_WRITE(sc, IP1000PHY_MII_BMCR,
  164                             reg | IP1000PHY_BMCR_ISO);
  165                         return (0);
  166                 }
  167 
  168                 /*
  169                  * If the interface is not up, don't do anything.
  170                  */
  171                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) {
  172                         break;
  173                 }
  174 
  175                 ip1000phy_reset(sc);
  176                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  177                 case IFM_AUTO:
  178                         (void)ip1000phy_mii_phy_auto(sc);
  179                         goto done;
  180                         break;
  181 
  182                 case IFM_1000_T:
  183                         /*
  184                          * XXX
  185                          * Manual 1000baseT setting doesn't seem to work.
  186                          */
  187                         speed = IP1000PHY_BMCR_1000;
  188                         break;
  189 
  190                 case IFM_100_TX:
  191                         speed = IP1000PHY_BMCR_100;
  192                         break;
  193 
  194                 case IFM_10_T:
  195                         speed = IP1000PHY_BMCR_10;
  196                         break;
  197 
  198                 default:
  199                         return (EINVAL);
  200                 }
  201 
  202                 if (((ife->ifm_media & IFM_GMASK) & IFM_FDX) != 0) {
  203                         speed |= IP1000PHY_BMCR_FDX;
  204                         gig = IP1000PHY_1000CR_1000T_FDX;
  205                 } else
  206                         gig = IP1000PHY_1000CR_1000T;
  207 
  208                 PHY_WRITE(sc, IP1000PHY_MII_1000CR, 0);
  209                 PHY_WRITE(sc, IP1000PHY_MII_BMCR, speed);
  210 
  211                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_1000_T)
  212                         break;
  213 
  214                 PHY_WRITE(sc, IP1000PHY_MII_1000CR, gig);
  215                 PHY_WRITE(sc, IP1000PHY_MII_BMCR, speed);
  216 
  217                 /*
  218                  * When setting the link manually, one side must
  219                  * be the master and the other the slave. However
  220                  * ifmedia doesn't give us a good way to specify
  221                  * this, so we fake it by using one of the LINK
  222                  * flags. If LINK0 is set, we program the PHY to
  223                  * be a master, otherwise it's a slave.
  224                  */
  225                 if ((mii->mii_ifp->if_flags & IFF_LINK0))
  226                         PHY_WRITE(sc, IP1000PHY_MII_1000CR, gig |
  227                             IP1000PHY_1000CR_MASTER |
  228                             IP1000PHY_1000CR_MMASTER |
  229                             IP1000PHY_1000CR_MANUAL);
  230                 else
  231                         PHY_WRITE(sc, IP1000PHY_MII_1000CR, gig |
  232                             IP1000PHY_1000CR_MASTER |
  233                             IP1000PHY_1000CR_MANUAL);
  234 
  235 done:
  236                 break;
  237 
  238         case MII_TICK:
  239                 /*
  240                  * If we're not currently selected, just return.
  241                  */
  242                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  243                         return (0);
  244                 /*
  245                  * Is the interface even up?
  246                  */
  247                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  248                         return (0);
  249 
  250                 /*
  251                  * Only used for autonegotiation.
  252                  */
  253                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
  254                         sc->mii_ticks = 0;
  255                         break;
  256                 }
  257 
  258                 /*
  259                  * check for link.
  260                  */
  261                 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  262                 if (reg & BMSR_LINK) {
  263                         sc->mii_ticks = 0;
  264                         break;
  265                 }
  266 
  267                 /* Announce link loss right after it happens */
  268                 if (sc->mii_ticks++ == 0)
  269                         break;
  270 
  271                 /*
  272                  * Only retry autonegotiation every mii_anegticks seconds.
  273                  */
  274                 if (sc->mii_ticks <= sc->mii_anegticks)
  275                         break;
  276 
  277                 sc->mii_ticks = 0;
  278                 ip1000phy_mii_phy_auto(sc);
  279                 break;
  280         }
  281 
  282         /* Update the media status. */
  283         ip1000phy_status(sc);
  284 
  285         /* Callback if something changed. */
  286         mii_phy_update(sc, cmd);
  287         return (0);
  288 }
  289 
  290 static void
  291 ip1000phy_status(struct mii_softc *sc)
  292 {
  293         struct ip1000phy_softc *isc;
  294         struct mii_data *mii = sc->mii_pdata;
  295         uint32_t bmsr, bmcr, stat;
  296         uint32_t ar, lpar;
  297 
  298         isc = (struct ip1000phy_softc *)sc;
  299 
  300         mii->mii_media_status = IFM_AVALID;
  301         mii->mii_media_active = IFM_ETHER;
  302 
  303         bmsr = PHY_READ(sc, IP1000PHY_MII_BMSR) |
  304             PHY_READ(sc, IP1000PHY_MII_BMSR);
  305         if ((bmsr & IP1000PHY_BMSR_LINK) != 0)
  306                 mii->mii_media_status |= IFM_ACTIVE;
  307 
  308         bmcr = PHY_READ(sc, IP1000PHY_MII_BMCR);
  309         if ((bmcr & IP1000PHY_BMCR_LOOP) != 0)
  310                 mii->mii_media_active |= IFM_LOOP;
  311 
  312         if ((bmcr & IP1000PHY_BMCR_AUTOEN) != 0) {
  313                 if ((bmsr & IP1000PHY_BMSR_ANEGCOMP) == 0) {
  314                         /* Erg, still trying, I guess... */
  315                         mii->mii_media_active |= IFM_NONE;
  316                         return;
  317                 }
  318         }
  319 
  320         if (isc->model == MII_MODEL_ICPLUS_IP1001) {
  321                 stat = PHY_READ(sc, IP1000PHY_LSR);
  322                 switch (stat & IP1000PHY_LSR_SPEED_MASK) {
  323                 case IP1000PHY_LSR_SPEED_10:
  324                         mii->mii_media_active |= IFM_10_T;
  325                         break;
  326                 case IP1000PHY_LSR_SPEED_100:
  327                         mii->mii_media_active |= IFM_100_TX;
  328                         break;
  329                 case IP1000PHY_LSR_SPEED_1000:
  330                         mii->mii_media_active |= IFM_1000_T;
  331                         break;
  332                 default:
  333                         mii->mii_media_active |= IFM_NONE;
  334                         return;
  335                 }
  336                 if ((stat & IP1000PHY_LSR_FULL_DUPLEX) != 0)
  337                         mii->mii_media_active |= IFM_FDX;
  338                 else
  339                         mii->mii_media_active |= IFM_HDX;
  340         } else {
  341                 stat = PHY_READ(sc, STGE_PhyCtrl);
  342                 switch (PC_LinkSpeed(stat)) {
  343                 case PC_LinkSpeed_Down:
  344                         mii->mii_media_active |= IFM_NONE;
  345                         return;
  346                 case PC_LinkSpeed_10:
  347                         mii->mii_media_active |= IFM_10_T;
  348                         break;
  349                 case PC_LinkSpeed_100:
  350                         mii->mii_media_active |= IFM_100_TX;
  351                         break;
  352                 case PC_LinkSpeed_1000:
  353                         mii->mii_media_active |= IFM_1000_T;
  354                         break;
  355                 default:
  356                         mii->mii_media_active |= IFM_NONE;
  357                         return;
  358                 }
  359                 if ((stat & PC_PhyDuplexStatus) != 0)
  360                         mii->mii_media_active |= IFM_FDX;
  361                 else
  362                         mii->mii_media_active |= IFM_HDX;
  363         }
  364 
  365         ar = PHY_READ(sc, IP1000PHY_MII_ANAR);
  366         lpar = PHY_READ(sc, IP1000PHY_MII_ANLPAR);
  367 
  368         /*
  369          * FLAG0 : Rx flow-control
  370          * FLAG1 : Tx flow-control
  371          */
  372         if ((ar & IP1000PHY_ANAR_PAUSE) && (lpar & IP1000PHY_ANLPAR_PAUSE))
  373                 mii->mii_media_active |= IFM_FLAG0 | IFM_FLAG1;
  374         else if (!(ar & IP1000PHY_ANAR_PAUSE) && (ar & IP1000PHY_ANAR_APAUSE) &&
  375             (lpar & IP1000PHY_ANLPAR_PAUSE) && (lpar & IP1000PHY_ANLPAR_APAUSE))
  376                 mii->mii_media_active |= IFM_FLAG1;
  377         else if ((ar & IP1000PHY_ANAR_PAUSE) && (ar & IP1000PHY_ANAR_APAUSE) &&
  378             !(lpar & IP1000PHY_ANLPAR_PAUSE) &&
  379             (lpar & IP1000PHY_ANLPAR_APAUSE)) {
  380                 mii->mii_media_active |= IFM_FLAG0;
  381         }
  382 
  383         /*
  384          * FLAG2 : local PHY resolved to MASTER
  385          */
  386         if ((mii->mii_media_active & IFM_1000_T) != 0) {
  387                 stat = PHY_READ(sc, IP1000PHY_MII_1000SR);
  388                 if ((stat & IP1000PHY_1000SR_MASTER) != 0)
  389                         mii->mii_media_active |= IFM_FLAG2;
  390         }
  391 }
  392 
  393 static int
  394 ip1000phy_mii_phy_auto(struct mii_softc *sc)
  395 {
  396         struct ip1000phy_softc *isc;
  397         uint32_t reg;
  398 
  399         isc = (struct ip1000phy_softc *)sc;
  400         reg = 0;
  401         if (isc->model == MII_MODEL_ICPLUS_IP1001)
  402                 reg = PHY_READ(sc, IP1000PHY_MII_ANAR);
  403         reg |= IP1000PHY_ANAR_10T | IP1000PHY_ANAR_10T_FDX |
  404             IP1000PHY_ANAR_100TX | IP1000PHY_ANAR_100TX_FDX |
  405             IP1000PHY_ANAR_PAUSE | IP1000PHY_ANAR_APAUSE;
  406         PHY_WRITE(sc, IP1000PHY_MII_ANAR, reg | IP1000PHY_ANAR_CSMA);
  407 
  408         reg = IP1000PHY_1000CR_1000T | IP1000PHY_1000CR_1000T_FDX;
  409         reg |= IP1000PHY_1000CR_MASTER;
  410         PHY_WRITE(sc, IP1000PHY_MII_1000CR, reg);
  411         PHY_WRITE(sc, IP1000PHY_MII_BMCR, (IP1000PHY_BMCR_FDX |
  412             IP1000PHY_BMCR_AUTOEN | IP1000PHY_BMCR_STARTNEG));
  413 
  414         return (EJUSTRETURN);
  415 }
  416 
  417 static void
  418 ip1000phy_load_dspcode(struct mii_softc *sc)
  419 {
  420 
  421         PHY_WRITE(sc, 31, 0x0001);
  422         PHY_WRITE(sc, 27, 0x01e0);
  423         PHY_WRITE(sc, 31, 0x0002);
  424         PHY_WRITE(sc, 27, 0xeb8e);
  425         PHY_WRITE(sc, 31, 0x0000);
  426         PHY_WRITE(sc, 30, 0x005e);
  427         PHY_WRITE(sc, 9, 0x0700);
  428 
  429         DELAY(50);
  430 }
  431 
  432 static void
  433 ip1000phy_reset(struct mii_softc *sc)
  434 {
  435         struct ip1000phy_softc *isc;
  436         struct stge_softc *stge_sc;
  437         struct mii_data *mii;
  438         uint32_t reg;
  439 
  440         isc = (struct ip1000phy_softc *)sc;
  441         mii_phy_reset(sc);
  442 
  443         /* clear autoneg/full-duplex as we don't want it after reset */
  444         reg = PHY_READ(sc, IP1000PHY_MII_BMCR);
  445         reg &= ~(IP1000PHY_BMCR_AUTOEN | IP1000PHY_BMCR_FDX);
  446         PHY_WRITE(sc, MII_BMCR, reg);
  447 
  448         mii = sc->mii_pdata;
  449         /*
  450          * XXX There should be more general way to pass PHY specific
  451          * data via mii interface.
  452          */
  453         if (isc->model == MII_MODEL_ICPLUS_IP1000A &&
  454              strcmp(mii->mii_ifp->if_dname, "stge") == 0) {
  455                 stge_sc = mii->mii_ifp->if_softc;
  456                 if (stge_sc->sc_rev >= 0x40 && stge_sc->sc_rev <= 0x4e)
  457                         ip1000phy_load_dspcode(sc);
  458         }
  459 }

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