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 <pci/if_rlreg.h>
   57 
   58 #include "miibus_if.h"
   59 
   60 struct rlphy_softc {
   61         struct mii_softc sc_mii;        /* generic PHY */
   62         int sc_is_RTL8201L;             /* is an external RTL8201L PHY */
   63 };
   64 
   65 static int rlphy_probe(device_t);
   66 static int rlphy_attach(device_t);
   67 
   68 static device_method_t rlphy_methods[] = {
   69         /* device interface */
   70         DEVMETHOD(device_probe,         rlphy_probe),
   71         DEVMETHOD(device_attach,        rlphy_attach),
   72         DEVMETHOD(device_detach,        mii_phy_detach),
   73         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   74         { 0, 0 }
   75 };
   76 
   77 static devclass_t rlphy_devclass;
   78 
   79 static driver_t rlphy_driver = {
   80         "rlphy",
   81         rlphy_methods,
   82         sizeof(struct rlphy_softc)
   83 };
   84 
   85 DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0);
   86 
   87 static int      rlphy_service(struct mii_softc *, struct mii_data *, int);
   88 static void     rlphy_status(struct mii_softc *);
   89 
   90 /*
   91  * RealTek internal PHYs don't have vendor/device ID registers;
   92  * re(4) and rl(4) fake up a return value of all zeros.
   93  */
   94 static const struct mii_phydesc rlintphys[] = {
   95         { 0, 0, "RealTek internal media interface" },
   96         MII_PHY_END
   97 };
   98 
   99 static const struct mii_phydesc rlphys[] = {
  100         MII_PHY_DESC(REALTEK, RTL8201L),
  101         MII_PHY_DESC(ICPLUS, IP101),
  102         MII_PHY_END
  103 };
  104 
  105 static int
  106 rlphy_probe(device_t dev)
  107 {
  108         const char *nic;
  109         int rv;
  110 
  111         rv = mii_phy_dev_probe(dev, rlphys, BUS_PROBE_DEFAULT);
  112         if (rv <= 0)
  113                 return (rv);
  114 
  115         nic = device_get_name(device_get_parent(device_get_parent(dev)));
  116         if (strcmp(nic, "rl") == 0 || strcmp(nic, "re") == 0)
  117                 return (mii_phy_dev_probe(dev, rlintphys, BUS_PROBE_DEFAULT));
  118         return (ENXIO);
  119 }
  120 
  121 static int
  122 rlphy_attach(device_t dev)
  123 {
  124         struct mii_softc        *sc;
  125         struct mii_attach_args  *ma;
  126         struct mii_data         *mii;
  127         struct rlphy_softc      *rsc;
  128 
  129         sc = device_get_softc(dev);
  130         ma = device_get_ivars(dev);
  131         sc->mii_dev = device_get_parent(dev);
  132         mii = device_get_softc(sc->mii_dev);
  133 
  134         /*
  135          * Check whether we're the RTL8201L PHY and remember so the status
  136          * routine can query the proper register for speed detection.
  137          */
  138         rsc = (struct rlphy_softc *)sc;
  139         if (mii_phy_dev_probe(dev, rlphys, 0) == 0)
  140                 rsc->sc_is_RTL8201L++;
  141         
  142         /*
  143          * The RealTek PHY can never be isolated, so never allow non-zero
  144          * instances!
  145          */
  146         if (mii->mii_instance != 0) {
  147                 device_printf(dev, "ignoring this PHY, non-zero instance\n");
  148                 return (ENXIO);
  149         }
  150 
  151         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  152 
  153         sc->mii_inst = mii->mii_instance;
  154         sc->mii_phy = ma->mii_phyno;
  155         sc->mii_service = rlphy_service;
  156         sc->mii_pdata = mii;
  157         mii->mii_instance++;
  158 
  159         sc->mii_flags |= MIIF_NOISOLATE;
  160 
  161 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  162 
  163         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
  164             MII_MEDIA_100_TX);
  165 
  166         mii_phy_reset(sc);
  167 
  168         sc->mii_capabilities =
  169             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  170         device_printf(dev, " ");
  171         mii_phy_add_media(sc);
  172         printf("\n");
  173 #undef ADD
  174         MIIBUS_MEDIAINIT(sc->mii_dev);
  175         return (0);
  176 }
  177 
  178 static int
  179 rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  180 {
  181         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  182 
  183         /*
  184          * We can't isolate the RealTek PHY, so it has to be the only one!
  185          */
  186         if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  187                 panic("rlphy_service: can't isolate RealTek PHY");
  188 
  189         switch (cmd) {
  190         case MII_POLLSTAT:
  191                 break;
  192 
  193         case MII_MEDIACHG:
  194                 /*
  195                  * If the interface is not up, don't do anything.
  196                  */
  197                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  198                         break;
  199 
  200                 mii_phy_setmedia(sc);
  201                 break;
  202 
  203         case MII_TICK:
  204                 /*
  205                  * Is the interface even up?
  206                  */
  207                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  208                         return (0);
  209 
  210                 /*
  211                  * The RealTek PHY's autonegotiation doesn't need to be
  212                  * kicked; it continues in the background.
  213                  */
  214                 break;
  215         }
  216 
  217         /* Update the media status. */
  218         rlphy_status(sc);
  219 
  220         /* Callback if something changed. */
  221         mii_phy_update(sc, cmd);
  222         return (0);
  223 }
  224 
  225 static void
  226 rlphy_status(struct mii_softc *phy)
  227 {
  228         struct rlphy_softc *rsc =(struct rlphy_softc *)phy;
  229         struct mii_data *mii = phy->mii_pdata;
  230         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  231         int bmsr, bmcr, anlpar;
  232 
  233         mii->mii_media_status = IFM_AVALID;
  234         mii->mii_media_active = IFM_ETHER;
  235 
  236         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
  237         if (bmsr & BMSR_LINK)
  238                 mii->mii_media_status |= IFM_ACTIVE;
  239 
  240         bmcr = PHY_READ(phy, MII_BMCR);
  241         if (bmcr & BMCR_ISO) {
  242                 mii->mii_media_active |= IFM_NONE;
  243                 mii->mii_media_status = 0;
  244                 return;
  245         }
  246 
  247         if (bmcr & BMCR_LOOP)
  248                 mii->mii_media_active |= IFM_LOOP;
  249 
  250         if (bmcr & BMCR_AUTOEN) {
  251                 /*
  252                  * NWay autonegotiation takes the highest-order common
  253                  * bit of the ANAR and ANLPAR (i.e. best media advertised
  254                  * both by us and our link partner).
  255                  */
  256                 if ((bmsr & BMSR_ACOMP) == 0) {
  257                         /* Erg, still trying, I guess... */
  258                         mii->mii_media_active |= IFM_NONE;
  259                         return;
  260                 }
  261 
  262                 if ((anlpar = PHY_READ(phy, MII_ANAR) &
  263                     PHY_READ(phy, MII_ANLPAR))) {
  264                         if (anlpar & ANLPAR_TX_FD)
  265                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  266                         else if (anlpar & ANLPAR_T4)
  267                                 mii->mii_media_active |= IFM_100_T4;
  268                         else if (anlpar & ANLPAR_TX)
  269                                 mii->mii_media_active |= IFM_100_TX;
  270                         else if (anlpar & ANLPAR_10_FD)
  271                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
  272                         else if (anlpar & ANLPAR_10)
  273                                 mii->mii_media_active |= IFM_10_T;
  274                         else
  275                                 mii->mii_media_active |= IFM_NONE;
  276                         return;
  277                 }
  278                 /*
  279                  * If the other side doesn't support NWAY, then the
  280                  * best we can do is determine if we have a 10Mbps or
  281                  * 100Mbps link. There's no way to know if the link
  282                  * is full or half duplex, so we default to half duplex
  283                  * and hope that the user is clever enough to manually
  284                  * change the media settings if we're wrong.
  285                  */
  286 
  287                 /*
  288                  * The RealTek PHY supports non-NWAY link speed
  289                  * detection, however it does not report the link
  290                  * detection results via the ANLPAR or BMSR registers.
  291                  * (What? RealTek doesn't do things the way everyone
  292                  * else does? I'm just shocked, shocked I tell you.)
  293                  * To determine the link speed, we have to do one
  294                  * of two things:
  295                  *
  296                  * - If this is a standalone RealTek RTL8201(L) PHY,
  297                  *   we can determine the link speed by testing bit 0
  298                  *   in the magic, vendor-specific register at offset
  299                  *   0x19.
  300                  *
  301                  * - If this is a RealTek MAC with integrated PHY, we
  302                  *   can test the 'SPEED10' bit of the MAC's media status
  303                  *   register.
  304                  */
  305                 if (rsc->sc_is_RTL8201L) {
  306                         if (PHY_READ(phy, 0x0019) & 0x01)
  307                                 mii->mii_media_active |= IFM_100_TX;
  308                         else
  309                                 mii->mii_media_active |= IFM_10_T;
  310                 } else {
  311                         if (PHY_READ(phy, RL_MEDIASTAT) &
  312                             RL_MEDIASTAT_SPEED10)
  313                                 mii->mii_media_active |= IFM_10_T;
  314                         else
  315                                 mii->mii_media_active |= IFM_100_TX;
  316                 }
  317         } else
  318                 mii->mii_media_active = ife->ifm_media;
  319 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/rlphy.c

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sys/dev/mii/rlphy.c
