ruephy.c

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    1 /*-
    2  * Copyright (c) 2001-2003, Shunsuke Akiyama <akiyama@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, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: releng/8.2/sys/dev/mii/ruephy.c 214909 2010-11-07 11:12:29Z marius $");
   30 
   31 /*
   32  * driver for RealTek RTL8150 internal PHY
   33  */
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/kernel.h>
   38 #include <sys/malloc.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_arp.h>
   45 #include <net/if_media.h>
   46 
   47 #include <dev/mii/mii.h>
   48 #include <dev/mii/miivar.h>
   49 #include "miidevs.h"
   50 
   51 #include <machine/bus.h>
   52 #include <dev/mii/ruephyreg.h>
   53 
   54 #include "miibus_if.h"
   55 
   56 static int ruephy_probe(device_t);
   57 static int ruephy_attach(device_t);
   58 
   59 static device_method_t ruephy_methods[] = {
   60         /* device interface */
   61         DEVMETHOD(device_probe,         ruephy_probe),
   62         DEVMETHOD(device_attach,        ruephy_attach),
   63         DEVMETHOD(device_detach,        mii_phy_detach),
   64         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   65         { 0, 0 }
   66 };
   67 
   68 static devclass_t ruephy_devclass;
   69 
   70 static driver_t ruephy_driver = {
   71         "ruephy",
   72         ruephy_methods,
   73         sizeof(struct mii_softc)
   74 };
   75 
   76 DRIVER_MODULE(ruephy, miibus, ruephy_driver, ruephy_devclass, 0, 0);
   77 
   78 static int ruephy_service(struct mii_softc *, struct mii_data *, int);
   79 static void ruephy_reset(struct mii_softc *);
   80 static void ruephy_status(struct mii_softc *);
   81 
   82 /*
   83  * The RealTek RTL8150 internal PHY doesn't have vendor/device ID
   84  * registers; rue(4) fakes up a return value of all zeros.
   85  */
   86 static const struct mii_phydesc ruephys[] = {
   87         { 0, 0, "RealTek RTL8150 internal media interface" },
   88         MII_PHY_END
   89 };
   90 
   91 static int
   92 ruephy_probe(device_t dev)
   93 {
   94 
   95         if (strcmp(device_get_name(device_get_parent(device_get_parent(dev))),
   96             "rue") == 0)
   97                 return (mii_phy_dev_probe(dev, ruephys, BUS_PROBE_DEFAULT));
   98         return (ENXIO);
   99 }
  100 
  101 static int
  102 ruephy_attach(device_t dev)
  103 {
  104         struct mii_softc        *sc;
  105         struct mii_attach_args  *ma;
  106         struct mii_data         *mii;
  107 
  108         sc = device_get_softc(dev);
  109         ma = device_get_ivars(dev);
  110         sc->mii_dev = device_get_parent(dev);
  111         mii = ma->mii_data;
  112         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  113 
  114         sc->mii_flags = miibus_get_flags(dev);
  115         sc->mii_inst = mii->mii_instance++;
  116         sc->mii_phy = ma->mii_phyno;
  117         sc->mii_service = ruephy_service;
  118         sc->mii_pdata = mii;
  119 
  120         /*
  121          * Apparently, we can neither isolate nor do loopback on this PHY.
  122          */
  123         sc->mii_flags |= MIIF_NOISOLATE | MIIF_NOLOOP;
  124 
  125         ruephy_reset(sc);
  126 
  127         sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  128         device_printf(dev, " ");
  129         mii_phy_add_media(sc);
  130         printf("\n");
  131 
  132         MIIBUS_MEDIAINIT(sc->mii_dev);
  133         return (0);
  134 }
  135 
  136 static int
  137 ruephy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  138 {
  139         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  140         int reg;
  141 
  142         switch (cmd) {
  143         case MII_POLLSTAT:
  144                 break;
  145 
  146         case MII_MEDIACHG:
  147                 /*
  148                  * If the interface is not up, don't do anything.
  149                  */
  150                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  151                         break;
  152 
  153                 mii_phy_setmedia(sc);
  154                 break;
  155 
  156         case MII_TICK:
  157                 /*
  158                  * Is the interface even up?
  159                  */
  160                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  161                         return (0);
  162 
  163                 /*
  164                  * Only used for autonegotiation.
  165                  */
  166                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
  167                         break;
  168 
  169                 /*
  170                  * Check to see if we have link.  If we do, we don't
  171                  * need to restart the autonegotiation process.  Read
  172                  * the MSR twice in case it's latched.
  173                  */
  174                 reg = PHY_READ(sc, RUEPHY_MII_MSR) |
  175                     PHY_READ(sc, RUEPHY_MII_MSR);
  176                 if (reg & RUEPHY_MSR_LINK)
  177                         break;
  178 
  179                 /* Only retry autonegotiation every mii_anegticks seconds. */
  180                 if (sc->mii_ticks <= sc->mii_anegticks)
  181                         break;
  182 
  183                 sc->mii_ticks = 0;
  184                 ruephy_reset(sc);
  185                 if (mii_phy_auto(sc) == EJUSTRETURN)
  186                         return (0);
  187                 break;
  188         }
  189 
  190         /* Update the media status. */
  191         ruephy_status(sc);
  192 
  193         /* Callback if something changed. */
  194         mii_phy_update(sc, cmd);
  195 
  196         return (0);
  197 }
  198 
  199 static void
  200 ruephy_reset(struct mii_softc *sc)
  201 {
  202 
  203         mii_phy_reset(sc);
  204 
  205         /*
  206          * XXX RealTek RTL8150 PHY doesn't set the BMCR properly after
  207          * XXX reset, which breaks autonegotiation.
  208          */
  209         PHY_WRITE(sc, MII_BMCR, (BMCR_S100 | BMCR_AUTOEN | BMCR_FDX));
  210 }
  211 
  212 static void
  213 ruephy_status(struct mii_softc *phy)
  214 {
  215         struct mii_data *mii = phy->mii_pdata;
  216         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  217         int bmsr, bmcr, msr;
  218 
  219         mii->mii_media_status = IFM_AVALID;
  220         mii->mii_media_active = IFM_ETHER;
  221 
  222         msr = PHY_READ(phy, RUEPHY_MII_MSR) | PHY_READ(phy, RUEPHY_MII_MSR);
  223         if (msr & RUEPHY_MSR_LINK)
  224                 mii->mii_media_status |= IFM_ACTIVE;
  225 
  226         bmcr = PHY_READ(phy, MII_BMCR);
  227         if (bmcr & BMCR_ISO) {
  228                 mii->mii_media_active |= IFM_NONE;
  229                 mii->mii_media_status = 0;
  230                 return;
  231         }
  232 
  233         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
  234         if (bmcr & BMCR_AUTOEN) {
  235                 if ((bmsr & BMSR_ACOMP) == 0) {
  236                         /* Erg, still trying, I guess... */
  237                         mii->mii_media_active |= IFM_NONE;
  238                         return;
  239                 }
  240 
  241                 if (msr & RUEPHY_MSR_SPEED100)
  242                         mii->mii_media_active |= IFM_100_TX;
  243                 else
  244                         mii->mii_media_active |= IFM_10_T;
  245 
  246                 if (msr & RUEPHY_MSR_DUPLEX)
  247                         mii->mii_media_active |= IFM_FDX;
  248                 else
  249                         mii->mii_media_active |= IFM_HDX;
  250         } else
  251                 mii->mii_media_active = ife->ifm_media;
  252 }

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sys/dev/mii/ruephy.c