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/6.0/sys/dev/mii/ruephy.c 129876 2004-05-30 17:57:46Z phk $");
   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 static int
   83 ruephy_probe(device_t dev)
   84 {
   85         struct mii_attach_args *ma;
   86         device_t                parent;
   87 
   88         ma = device_get_ivars(dev);
   89         parent = device_get_parent(device_get_parent(dev));
   90 
   91         /*
   92          * RealTek RTL8150 PHY doesn't have vendor/device ID registers:
   93          * the rue driver fakes up a return value of all zeros.
   94          */
   95         if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 ||
   96             MII_MODEL(ma->mii_id2) != 0)
   97                 return (ENXIO);
   98 
   99         /*
  100          * Make sure the parent is an 'rue'.
  101          */
  102         if (strcmp(device_get_name(parent), "rue") != 0)
  103                 return (ENXIO);
  104 
  105         device_set_desc(dev, "RealTek RTL8150 internal media interface");
  106 
  107         return (0);
  108 }
  109 
  110 static int
  111 ruephy_attach(device_t dev)
  112 {
  113         struct mii_softc        *sc;
  114         struct mii_attach_args  *ma;
  115         struct mii_data         *mii;
  116 
  117         sc = device_get_softc(dev);
  118         ma = device_get_ivars(dev);
  119         sc->mii_dev = device_get_parent(dev);
  120         mii = device_get_softc(sc->mii_dev);
  121 
  122         /*
  123          * The RealTek PHY can never be isolated, so never allow non-zero
  124          * instances!
  125          */
  126         if (mii->mii_instance != 0) {
  127                 device_printf(dev, "ignoring this PHY, non-zero instance\n");
  128                 return (ENXIO);
  129         }
  130 
  131         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  132 
  133         sc->mii_inst = mii->mii_instance;
  134         sc->mii_phy = ma->mii_phyno;
  135         sc->mii_service = ruephy_service;
  136         sc->mii_pdata = mii;
  137         mii->mii_instance++;
  138 
  139         sc->mii_flags |= MIIF_NOISOLATE;
  140 
  141 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  142 
  143         ruephy_reset(sc);
  144 
  145         sc->mii_capabilities =
  146             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  147         device_printf(dev, " ");
  148         mii_phy_add_media(sc);
  149         printf("\n");
  150 #undef ADD
  151 
  152         MIIBUS_MEDIAINIT(sc->mii_dev);
  153         return (0);
  154 }
  155 
  156 static int
  157 ruephy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  158 {
  159         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  160         int reg;
  161 
  162         /*
  163          * We can't isolate the RealTek RTL8150 PHY,
  164          * so it has to be the only one!
  165          */
  166         if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  167                 panic("ruephy_service: can't isolate RealTek RTL8150 PHY");
  168 
  169         switch (cmd) {
  170         case MII_POLLSTAT:
  171                 break;
  172 
  173         case MII_MEDIACHG:
  174                 /*
  175                  * If the interface is not up, don't do anything.
  176                  */
  177                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  178                         break;
  179 
  180                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  181                 case IFM_AUTO:
  182                         /*
  183                          * If we're already in auto mode, just return.
  184                          */
  185                         if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
  186                                 return (0);
  187                         (void) mii_phy_auto(sc);
  188                         break;
  189                 case IFM_100_T4:
  190                         /*
  191                          * XXX Not supported as a manual setting right now.
  192                          */
  193                         return (EINVAL);
  194                 default:
  195                         /*
  196                          * BMCR data is stored in the ifmedia entry.
  197                          */
  198                         PHY_WRITE(sc, MII_ANAR,
  199                             mii_anar(ife->ifm_media));
  200                         PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
  201                 }
  202                 break;
  203 
  204         case MII_TICK:
  205                 /*
  206                  * Is the interface even up?
  207                  */
  208                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  209                         return (0);
  210 
  211                 /*
  212                  * Only used for autonegotiation.
  213                  */
  214                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
  215                         break;
  216 
  217                 /*
  218                  * Check to see if we have link.  If we do, we don't
  219                  * need to restart the autonegotiation process.  Read
  220                  * the MSR twice in case it's latched.
  221                  */
  222                 reg = PHY_READ(sc, RUEPHY_MII_MSR) |
  223                       PHY_READ(sc, RUEPHY_MII_MSR);
  224                 if (reg & RUEPHY_MSR_LINK)
  225                         break;
  226 
  227                 /*
  228                  * Only retry autonegotiation every 5 seconds.
  229                  */
  230                 if (++sc->mii_ticks <= 5)
  231                         break;
  232 
  233                 sc->mii_ticks = 0;
  234                 ruephy_reset(sc);
  235                 if (mii_phy_auto(sc) == EJUSTRETURN)
  236                         return (0);
  237                 break;
  238         }
  239 
  240         /* Update the media status. */
  241         ruephy_status(sc);
  242 
  243         /* Callback if something changed. */
  244         mii_phy_update(sc, cmd);
  245 
  246         return (0);
  247 }
  248 
  249 static void
  250 ruephy_reset(struct mii_softc *sc)
  251 {
  252 
  253         mii_phy_reset(sc);
  254 
  255         /*
  256          * XXX RealTek RTL8150 PHY doesn't set the BMCR properly after
  257          * XXX reset, which breaks autonegotiation.
  258          */
  259         PHY_WRITE(sc, MII_BMCR, (BMCR_S100 | BMCR_AUTOEN | BMCR_FDX));
  260 }
  261 
  262 static void
  263 ruephy_status(struct mii_softc *phy)
  264 {
  265         struct mii_data *mii = phy->mii_pdata;
  266         int bmsr, bmcr, msr;
  267 
  268         mii->mii_media_status = IFM_AVALID;
  269         mii->mii_media_active = IFM_ETHER;
  270 
  271         msr = PHY_READ(phy, RUEPHY_MII_MSR) | PHY_READ(phy, RUEPHY_MII_MSR);
  272         if (msr & RUEPHY_MSR_LINK)
  273                 mii->mii_media_status |= IFM_ACTIVE;
  274 
  275         bmcr = PHY_READ(phy, MII_BMCR);
  276         if (bmcr & BMCR_ISO) {
  277                 mii->mii_media_active |= IFM_NONE;
  278                 mii->mii_media_status = 0;
  279                 return;
  280         }
  281 
  282         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
  283 
  284         if (bmcr & BMCR_AUTOEN) {
  285                 if ((bmsr & BMSR_ACOMP) == 0) {
  286                         /* Erg, still trying, I guess... */
  287                         mii->mii_media_active |= IFM_NONE;
  288                         return;
  289                 }
  290 
  291                 if (msr & RUEPHY_MSR_SPEED100)
  292                         mii->mii_media_active |= IFM_100_TX;
  293                 else
  294                         mii->mii_media_active |= IFM_10_T;
  295 
  296                 if (msr & RUEPHY_MSR_DUPLEX)
  297                         mii->mii_media_active |= IFM_FDX;
  298         } else
  299                 mii->mii_media_active = mii_media_from_bmcr(bmcr);
  300 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/ruephy.c

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