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  * $FreeBSD: src/sys/dev/mii/ruephy.c,v 1.1.4.1 2003/07/30 13:57:35 akiyama Exp $
   27  */
   28 
   29 /*
   30  * driver for RealTek RTL8150 internal PHY
   31  */
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/kernel.h>
   36 #include <sys/malloc.h>
   37 #include <sys/socket.h>
   38 #include <sys/bus.h>
   39 
   40 #include <net/if.h>
   41 #include <net/if_media.h>
   42 
   43 #include <dev/netif/mii_layer/mii.h>
   44 #include <dev/netif/mii_layer/miivar.h>
   45 #include <dev/netif/mii_layer/ruephyreg.h>
   46 
   47 #include "miibus_if.h"
   48 
   49 static int ruephy_probe(device_t);
   50 static int ruephy_attach(device_t);
   51 
   52 static device_method_t ruephy_methods[] = {
   53         /* device interface */
   54         DEVMETHOD(device_probe,         ruephy_probe),
   55         DEVMETHOD(device_attach,        ruephy_attach),
   56         DEVMETHOD(device_detach,        ukphy_detach),
   57         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   58         DEVMETHOD_END
   59 };
   60 
   61 static devclass_t ruephy_devclass;
   62 
   63 static driver_t ruephy_driver = {
   64         "ruephy",
   65         ruephy_methods,
   66         sizeof(struct mii_softc)
   67 };
   68 
   69 DRIVER_MODULE(ruephy, miibus, ruephy_driver, ruephy_devclass, NULL, NULL);
   70 
   71 static int ruephy_service(struct mii_softc *, struct mii_data *, int);
   72 static void ruephy_reset(struct mii_softc *);
   73 static void ruephy_status(struct mii_softc *);
   74 
   75 static int
   76 ruephy_probe(device_t dev)
   77 {
   78         struct mii_attach_args *ma;
   79         device_t                parent;
   80 
   81         ma = device_get_ivars(dev);
   82         parent = device_get_parent(device_get_parent(dev));
   83 
   84         /*
   85          * RealTek RTL8150 PHY doesn't have vendor/device ID registers:
   86          * the rue driver fakes up a return value of all zeros.
   87          */
   88         if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 ||
   89             MII_MODEL(ma->mii_id2) != 0)
   90                 return (ENXIO);
   91 
   92         /*
   93          * Make sure the parent is an 'rue'.
   94          */
   95         if (strcmp(device_get_name(parent), "rue") != 0)
   96                 return (ENXIO);
   97 
   98         device_set_desc(dev, "RealTek RTL8150 internal media interface");
   99 
  100         return (0);
  101 }
  102 
  103 static int
  104 ruephy_attach(device_t dev)
  105 {
  106         struct mii_softc        *sc;
  107         struct mii_attach_args  *ma;
  108         struct mii_data         *mii;
  109 
  110         sc = device_get_softc(dev);
  111         ma = device_get_ivars(dev);
  112         mii_softc_init(sc, ma);
  113         sc->mii_dev = device_get_parent(dev);
  114         mii = device_get_softc(sc->mii_dev);
  115 
  116         /*
  117          * The RealTek PHY can never be isolated, so never allow non-zero
  118          * instances!
  119          */
  120         if (mii->mii_instance != 0) {
  121                 device_printf(dev, "ignoring this PHY, non-zero instance\n");
  122                 return (ENXIO);
  123         }
  124 
  125         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  126 
  127         sc->mii_inst = mii->mii_instance;
  128         sc->mii_service = ruephy_service;
  129         sc->mii_reset = ruephy_reset;
  130         sc->mii_pdata = mii;
  131         mii->mii_instance++;
  132 
  133         sc->mii_flags |= MIIF_NOISOLATE;
  134 
  135         ruephy_reset(sc);
  136 
  137         sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  138 
  139         device_printf(dev, " ");
  140         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
  141                 kprintf("no media present");
  142         else
  143                 mii_phy_add_media(sc);
  144         kprintf("\n");
  145 
  146         MIIBUS_MEDIAINIT(sc->mii_dev);
  147         return (0);
  148 }
  149 
  150 static int
  151 ruephy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  152 {
  153         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  154         int reg;
  155 
  156         /*
  157          * We can't isolate the RealTek RTL8150 PHY,
  158          * so it has to be the only one!
  159          */
  160         KASSERT(IFM_INST(ife->ifm_media) == sc->mii_inst,
  161                 ("ruephy_service: can't isolate RealTek RTL8150 PHY"));
  162 
  163         switch (cmd) {
  164         case MII_POLLSTAT:
  165                 break;
  166 
  167         case MII_MEDIACHG:
  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                 if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_T4) {
  175                         /*
  176                          * XXX Not supported as a manual setting right now.
  177                          */
  178                         return (EINVAL);
  179                 }
  180 
  181                 mii_phy_set_media(sc);
  182                 break;
  183 
  184         case MII_TICK:
  185                 /*
  186                  * Is the interface even up?
  187                  */
  188                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  189                         return (0);
  190 
  191                 /*
  192                  * Only used for autonegotiation.
  193                  */
  194                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
  195                         break;
  196 
  197                 /*
  198                  * Check to see if we have link.  If we do, we don't
  199                  * need to restart the autonegotiation process.  Read
  200                  * the MSR twice in case it's latched.
  201                  */
  202                 reg = PHY_READ(sc, RUEPHY_MII_MSR) |
  203                       PHY_READ(sc, RUEPHY_MII_MSR);
  204                 if (reg & RUEPHY_MSR_LINK) {
  205                         sc->mii_ticks = 0;
  206                         break;
  207                 }
  208 
  209                 /*
  210                  * Only retry autonegotiation every 5 seconds.
  211                  */
  212                 if (++sc->mii_ticks != 5)
  213                         return (0);
  214 
  215                 sc->mii_ticks = 0;
  216                 ruephy_reset(sc);
  217 
  218                 if (mii_phy_auto(sc, 0) == EJUSTRETURN)
  219                         return (0);
  220                 break;
  221         }
  222 
  223         /* Update the media status. */
  224         ruephy_status(sc);
  225 
  226         /* Callback if something changed. */
  227         mii_phy_update(sc, cmd);
  228         return (0);
  229 }
  230 
  231 static void
  232 ruephy_reset(struct mii_softc *sc)
  233 {
  234 
  235         mii_phy_reset(sc);
  236 
  237         /*
  238          * XXX RealTek RTL8150 PHY doesn't set the BMCR properly after
  239          * XXX reset, which breaks autonegotiation.
  240          */
  241         PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN);
  242 }
  243 
  244 static void
  245 ruephy_status(struct mii_softc *sc)
  246 {
  247         struct mii_data *mii = sc->mii_pdata;
  248         int bmsr, bmcr, msr;
  249 
  250         mii->mii_media_status = IFM_AVALID;
  251         mii->mii_media_active = IFM_ETHER;
  252 
  253         msr = PHY_READ(sc, RUEPHY_MII_MSR) | PHY_READ(sc, RUEPHY_MII_MSR);
  254         if (msr & RUEPHY_MSR_LINK)
  255                 mii->mii_media_status |= IFM_ACTIVE;
  256 
  257         bmcr = PHY_READ(sc, MII_BMCR);
  258         if (bmcr & BMCR_ISO) {
  259                 mii->mii_media_active |= IFM_NONE;
  260                 mii->mii_media_status = 0;
  261                 return;
  262         }
  263 
  264         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  265 
  266         if (bmcr & BMCR_AUTOEN) {
  267                 if ((bmsr & BMSR_ACOMP) == 0) {
  268                         /* Erg, still trying, I guess... */
  269                         mii->mii_media_active |= IFM_NONE;
  270                         return;
  271                 }
  272 
  273                 if (msr & RUEPHY_MSR_SPEED100)
  274                         mii->mii_media_active |= IFM_100_TX;
  275                 else
  276                         mii->mii_media_active |= IFM_10_T;
  277 
  278                 if (msr & RUEPHY_MSR_DUPLEX)
  279                         mii->mii_media_active |= IFM_FDX;
  280         } else {
  281                 mii->mii_media_active = mii->mii_media.ifm_cur->ifm_media;
  282         }
  283 }

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sys/dev/netif/mii_layer/ruephy.c