rlphy.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-4-Clause
    3  *
    4  * Copyright (c) 1997, 1998, 1999
    5  *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by Bill Paul.
   18  * 4. Neither the name of the author nor the names of any co-contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
   26  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   32  * THE POSSIBILITY OF SUCH DAMAGE.
   33  */
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD$");
   37 
   38 /*
   39  * driver for RealTek 8139 internal PHYs
   40  */
   41 
   42 #include <sys/param.h>
   43 #include <sys/systm.h>
   44 #include <sys/kernel.h>
   45 #include <sys/module.h>
   46 #include <sys/socket.h>
   47 #include <sys/bus.h>
   48 #include <sys/taskqueue.h>      /* XXXGL: if_rlreg.h contamination */
   49 
   50 #include <net/if.h>
   51 #include <net/if_arp.h>
   52 #include <net/if_media.h>
   53 
   54 #include <dev/mii/mii.h>
   55 #include <dev/mii/miivar.h>
   56 #include "miidevs.h"
   57 
   58 #include <machine/bus.h>
   59 #include <dev/rl/if_rlreg.h>
   60 
   61 #include "miibus_if.h"
   62 
   63 static int rlphy_probe(device_t);
   64 static int rlphy_attach(device_t);
   65 
   66 static device_method_t rlphy_methods[] = {
   67         /* device interface */
   68         DEVMETHOD(device_probe,         rlphy_probe),
   69         DEVMETHOD(device_attach,        rlphy_attach),
   70         DEVMETHOD(device_detach,        mii_phy_detach),
   71         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   72         DEVMETHOD_END
   73 };
   74 
   75 static driver_t rlphy_driver = {
   76         "rlphy",
   77         rlphy_methods,
   78         sizeof(struct mii_softc)
   79 };
   80 
   81 DRIVER_MODULE(rlphy, miibus, rlphy_driver, 0, 0);
   82 
   83 static int      rlphy_service(struct mii_softc *, struct mii_data *, int);
   84 static void     rlphy_status(struct mii_softc *);
   85 
   86 /*
   87  * RealTek internal PHYs don't have vendor/device ID registers;
   88  * re(4) and rl(4) fake up a return value of all zeros.
   89  */
   90 static const struct mii_phydesc rlintphys[] = {
   91         { 0, 0, "RealTek internal media interface" },
   92         MII_PHY_END
   93 };
   94 
   95 static const struct mii_phydesc rlphys[] = {
   96         MII_PHY_DESC(yyREALTEK, RTL8201L),
   97         MII_PHY_DESC(REALTEK, RTL8201E),
   98         MII_PHY_DESC(xxICPLUS, IP101),
   99         MII_PHY_END
  100 };
  101 
  102 static const struct mii_phy_funcs rlphy_funcs = {
  103         rlphy_service,
  104         rlphy_status,
  105         mii_phy_reset
  106 };
  107 
  108 static int
  109 rlphy_probe(device_t dev)
  110 {
  111         int rv;
  112 
  113         rv = mii_phy_dev_probe(dev, rlphys, BUS_PROBE_DEFAULT);
  114         if (rv <= 0)
  115                 return (rv);
  116 
  117         if (mii_dev_mac_match(dev, "rl") || mii_dev_mac_match(dev, "re"))
  118                 return (mii_phy_dev_probe(dev, rlintphys, BUS_PROBE_DEFAULT));
  119         return (ENXIO);
  120 }
  121 
  122 static int
  123 rlphy_attach(device_t dev)
  124 {
  125 
  126         /*
  127          * The RealTek PHY can never be isolated.
  128          */
  129         mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
  130             &rlphy_funcs, 1);
  131         return (0);
  132 }
  133 
  134 static int
  135 rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  136 {
  137 
  138         switch (cmd) {
  139         case MII_POLLSTAT:
  140                 break;
  141 
  142         case MII_MEDIACHG:
  143                 mii_phy_setmedia(sc);
  144                 break;
  145 
  146         case MII_TICK:
  147                 /*
  148                  * The RealTek PHY's autonegotiation doesn't need to be
  149                  * kicked; it continues in the background.
  150                  */
  151                 break;
  152         }
  153 
  154         /* Update the media status. */
  155         PHY_STATUS(sc);
  156 
  157         /* Callback if something changed. */
  158         mii_phy_update(sc, cmd);
  159         return (0);
  160 }
  161 
  162 static void
  163 rlphy_status(struct mii_softc *phy)
  164 {
  165         struct mii_data *mii = phy->mii_pdata;
  166         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  167         int bmsr, bmcr, anlpar;
  168 
  169         mii->mii_media_status = IFM_AVALID;
  170         mii->mii_media_active = IFM_ETHER;
  171 
  172         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
  173         if (bmsr & BMSR_LINK)
  174                 mii->mii_media_status |= IFM_ACTIVE;
  175 
  176         bmcr = PHY_READ(phy, MII_BMCR);
  177         if (bmcr & BMCR_ISO) {
  178                 mii->mii_media_active |= IFM_NONE;
  179                 mii->mii_media_status = 0;
  180                 return;
  181         }
  182 
  183         if (bmcr & BMCR_LOOP)
  184                 mii->mii_media_active |= IFM_LOOP;
  185 
  186         if (bmcr & BMCR_AUTOEN) {
  187                 /*
  188                  * NWay autonegotiation takes the highest-order common
  189                  * bit of the ANAR and ANLPAR (i.e. best media advertised
  190                  * both by us and our link partner).
  191                  */
  192                 if ((bmsr & BMSR_ACOMP) == 0) {
  193                         /* Erg, still trying, I guess... */
  194                         mii->mii_media_active |= IFM_NONE;
  195                         return;
  196                 }
  197 
  198                 if ((anlpar = PHY_READ(phy, MII_ANAR) &
  199                     PHY_READ(phy, MII_ANLPAR))) {
  200                         if (anlpar & ANLPAR_TX_FD)
  201                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  202                         else if (anlpar & ANLPAR_T4)
  203                                 mii->mii_media_active |= IFM_100_T4|IFM_HDX;
  204                         else if (anlpar & ANLPAR_TX)
  205                                 mii->mii_media_active |= IFM_100_TX|IFM_HDX;
  206                         else if (anlpar & ANLPAR_10_FD)
  207                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
  208                         else if (anlpar & ANLPAR_10)
  209                                 mii->mii_media_active |= IFM_10_T|IFM_HDX;
  210                         else
  211                                 mii->mii_media_active |= IFM_NONE;
  212                         if ((mii->mii_media_active & IFM_FDX) != 0)
  213                                 mii->mii_media_active |=
  214                                     mii_phy_flowstatus(phy);
  215                         return;
  216                 }
  217                 /*
  218                  * If the other side doesn't support NWAY, then the
  219                  * best we can do is determine if we have a 10Mbps or
  220                  * 100Mbps link. There's no way to know if the link
  221                  * is full or half duplex, so we default to half duplex
  222                  * and hope that the user is clever enough to manually
  223                  * change the media settings if we're wrong.
  224                  */
  225 
  226                 /*
  227                  * The RealTek PHY supports non-NWAY link speed
  228                  * detection, however it does not report the link
  229                  * detection results via the ANLPAR or BMSR registers.
  230                  * (What? RealTek doesn't do things the way everyone
  231                  * else does? I'm just shocked, shocked I tell you.)
  232                  * To determine the link speed, we have to do one
  233                  * of two things:
  234                  *
  235                  * - If this is a standalone RealTek RTL8201(L) or
  236                  *   workalike PHY, we can determine the link speed by
  237                  *   testing bit 0 in the magic, vendor-specific register
  238                  *   at offset 0x19.
  239                  *
  240                  * - If this is a RealTek MAC with integrated PHY, we
  241                  *   can test the 'SPEED10' bit of the MAC's media status
  242                  *   register.
  243                  */
  244                 if (!(phy->mii_mpd_model == 0 && phy->mii_mpd_rev == 0)) {
  245                         if (PHY_READ(phy, 0x0019) & 0x01)
  246                                 mii->mii_media_active |= IFM_100_TX;
  247                         else
  248                                 mii->mii_media_active |= IFM_10_T;
  249                 } else {
  250                         if (PHY_READ(phy, RL_MEDIASTAT) &
  251                             RL_MEDIASTAT_SPEED10)
  252                                 mii->mii_media_active |= IFM_10_T;
  253                         else
  254                                 mii->mii_media_active |= IFM_100_TX;
  255                 }
  256                 mii->mii_media_active |= IFM_HDX;
  257         } else
  258                 mii->mii_media_active = ife->ifm_media;
  259 }

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

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sys/dev/mii/rlphy.c