rlphy.c

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    1 /*-
    2  * Copyright (c) 1997, 1998, 1999
    3  *      Bill Paul <wpaul@ctr.columbia.edu>.  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  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by Bill Paul.
   16  * 4. Neither the name of the author nor the names of any co-contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
   24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   30  * THE POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD$");
   35 
   36 /*
   37  * driver for RealTek 8139 internal PHYs
   38  */
   39 
   40 #include <sys/param.h>
   41 #include <sys/systm.h>
   42 #include <sys/kernel.h>
   43 #include <sys/module.h>
   44 #include <sys/socket.h>
   45 #include <sys/bus.h>
   46 
   47 #include <net/if.h>
   48 #include <net/if_arp.h>
   49 #include <net/if_media.h>
   50 
   51 #include <dev/mii/mii.h>
   52 #include <dev/mii/miivar.h>
   53 #include "miidevs.h"
   54 
   55 #include <machine/bus.h>
   56 #include <dev/rl/if_rlreg.h>
   57 
   58 #include "miibus_if.h"
   59 
   60 static int rlphy_probe(device_t);
   61 static int rlphy_attach(device_t);
   62 
   63 static device_method_t rlphy_methods[] = {
   64         /* device interface */
   65         DEVMETHOD(device_probe,         rlphy_probe),
   66         DEVMETHOD(device_attach,        rlphy_attach),
   67         DEVMETHOD(device_detach,        mii_phy_detach),
   68         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   69         DEVMETHOD_END
   70 };
   71 
   72 static devclass_t rlphy_devclass;
   73 
   74 static driver_t rlphy_driver = {
   75         "rlphy",
   76         rlphy_methods,
   77         sizeof(struct mii_softc)
   78 };
   79 
   80 DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0);
   81 
   82 static int      rlphy_service(struct mii_softc *, struct mii_data *, int);
   83 static void     rlphy_status(struct mii_softc *);
   84 
   85 /*
   86  * RealTek internal PHYs don't have vendor/device ID registers;
   87  * re(4) and rl(4) fake up a return value of all zeros.
   88  */
   89 static const struct mii_phydesc rlintphys[] = {
   90         { 0, 0, "RealTek internal media interface" },
   91         MII_PHY_END
   92 };
   93 
   94 static const struct mii_phydesc rlphys[] = {
   95         MII_PHY_DESC(yyREALTEK, RTL8201L),
   96         MII_PHY_DESC(REALTEK, RTL8201E),
   97         MII_PHY_DESC(xxICPLUS, IP101),
   98         MII_PHY_END
   99 };
  100 
  101 static const struct mii_phy_funcs rlphy_funcs = {
  102         rlphy_service,
  103         rlphy_status,
  104         mii_phy_reset
  105 };
  106 
  107 static int
  108 rlphy_probe(device_t dev)
  109 {
  110         const char *nic;
  111         int rv;
  112 
  113         rv = mii_phy_dev_probe(dev, rlphys, BUS_PROBE_DEFAULT);
  114         if (rv <= 0)
  115                 return (rv);
  116 
  117         nic = device_get_name(device_get_parent(device_get_parent(dev)));
  118         if (strcmp(nic, "rl") == 0 || strcmp(nic, "re") == 0)
  119                 return (mii_phy_dev_probe(dev, rlintphys, BUS_PROBE_DEFAULT));
  120         return (ENXIO);
  121 }
  122 
  123 static int
  124 rlphy_attach(device_t dev)
  125 {
  126 
  127         /*
  128          * The RealTek PHY can never be isolated.
  129          */
  130         mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
  131             &rlphy_funcs, 1);
  132         return (0);
  133 }
  134 
  135 static int
  136 rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  137 {
  138 
  139         switch (cmd) {
  140         case MII_POLLSTAT:
  141                 break;
  142 
  143         case MII_MEDIACHG:
  144                 /*
  145                  * If the interface is not up, don't do anything.
  146                  */
  147                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  148                         break;
  149 
  150                 mii_phy_setmedia(sc);
  151                 break;
  152 
  153         case MII_TICK:
  154                 /*
  155                  * Is the interface even up?
  156                  */
  157                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  158                         return (0);
  159 
  160                 /*
  161                  * The RealTek PHY's autonegotiation doesn't need to be
  162                  * kicked; it continues in the background.
  163                  */
  164                 break;
  165         }
  166 
  167         /* Update the media status. */
  168         PHY_STATUS(sc);
  169 
  170         /* Callback if something changed. */
  171         mii_phy_update(sc, cmd);
  172         return (0);
  173 }
  174 
  175 static void
  176 rlphy_status(struct mii_softc *phy)
  177 {
  178         struct mii_data *mii = phy->mii_pdata;
  179         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  180         int bmsr, bmcr, anlpar;
  181 
  182         mii->mii_media_status = IFM_AVALID;
  183         mii->mii_media_active = IFM_ETHER;
  184 
  185         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
  186         if (bmsr & BMSR_LINK)
  187                 mii->mii_media_status |= IFM_ACTIVE;
  188 
  189         bmcr = PHY_READ(phy, MII_BMCR);
  190         if (bmcr & BMCR_ISO) {
  191                 mii->mii_media_active |= IFM_NONE;
  192                 mii->mii_media_status = 0;
  193                 return;
  194         }
  195 
  196         if (bmcr & BMCR_LOOP)
  197                 mii->mii_media_active |= IFM_LOOP;
  198 
  199         if (bmcr & BMCR_AUTOEN) {
  200                 /*
  201                  * NWay autonegotiation takes the highest-order common
  202                  * bit of the ANAR and ANLPAR (i.e. best media advertised
  203                  * both by us and our link partner).
  204                  */
  205                 if ((bmsr & BMSR_ACOMP) == 0) {
  206                         /* Erg, still trying, I guess... */
  207                         mii->mii_media_active |= IFM_NONE;
  208                         return;
  209                 }
  210 
  211                 if ((anlpar = PHY_READ(phy, MII_ANAR) &
  212                     PHY_READ(phy, MII_ANLPAR))) {
  213                         if (anlpar & ANLPAR_TX_FD)
  214                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  215                         else if (anlpar & ANLPAR_T4)
  216                                 mii->mii_media_active |= IFM_100_T4|IFM_HDX;
  217                         else if (anlpar & ANLPAR_TX)
  218                                 mii->mii_media_active |= IFM_100_TX|IFM_HDX;
  219                         else if (anlpar & ANLPAR_10_FD)
  220                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
  221                         else if (anlpar & ANLPAR_10)
  222                                 mii->mii_media_active |= IFM_10_T|IFM_HDX;
  223                         else
  224                                 mii->mii_media_active |= IFM_NONE;
  225                         if ((mii->mii_media_active & IFM_FDX) != 0)
  226                                 mii->mii_media_active |=
  227                                     mii_phy_flowstatus(phy);
  228                         return;
  229                 }
  230                 /*
  231                  * If the other side doesn't support NWAY, then the
  232                  * best we can do is determine if we have a 10Mbps or
  233                  * 100Mbps link. There's no way to know if the link
  234                  * is full or half duplex, so we default to half duplex
  235                  * and hope that the user is clever enough to manually
  236                  * change the media settings if we're wrong.
  237                  */
  238 
  239                 /*
  240                  * The RealTek PHY supports non-NWAY link speed
  241                  * detection, however it does not report the link
  242                  * detection results via the ANLPAR or BMSR registers.
  243                  * (What? RealTek doesn't do things the way everyone
  244                  * else does? I'm just shocked, shocked I tell you.)
  245                  * To determine the link speed, we have to do one
  246                  * of two things:
  247                  *
  248                  * - If this is a standalone RealTek RTL8201(L) or
  249                  *   workalike PHY, we can determine the link speed by
  250                  *   testing bit 0 in the magic, vendor-specific register
  251                  *   at offset 0x19.
  252                  *
  253                  * - If this is a RealTek MAC with integrated PHY, we
  254                  *   can test the 'SPEED10' bit of the MAC's media status
  255                  *   register.
  256                  */
  257                 if (!(phy->mii_mpd_model == 0 && phy->mii_mpd_rev == 0)) {
  258                         if (PHY_READ(phy, 0x0019) & 0x01)
  259                                 mii->mii_media_active |= IFM_100_TX;
  260                         else
  261                                 mii->mii_media_active |= IFM_10_T;
  262                 } else {
  263                         if (PHY_READ(phy, RL_MEDIASTAT) &
  264                             RL_MEDIASTAT_SPEED10)
  265                                 mii->mii_media_active |= IFM_10_T;
  266                         else
  267                                 mii->mii_media_active |= IFM_100_TX;
  268                 }
  269                 mii->mii_media_active |= IFM_HDX;
  270         } else
  271                 mii->mii_media_active = ife->ifm_media;
  272 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/rlphy.c

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