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: releng/6.0/sys/dev/mii/rlphy.c 139749 2005-01-06 01:43:34Z imp $");
   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 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         { 0, 0 }
   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 static int
   86 rlphy_probe(dev)
   87         device_t                dev;
   88 {
   89         struct mii_attach_args *ma;
   90         device_t                parent;
   91 
   92         ma = device_get_ivars(dev);
   93         parent = device_get_parent(device_get_parent(dev));
   94 
   95         /* Test for RealTek 8201L PHY */
   96         if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_REALTEK &&
   97             MII_MODEL(ma->mii_id2) == MII_MODEL_REALTEK_RTL8201L) {
   98                 device_set_desc(dev, MII_STR_REALTEK_RTL8201L);
   99                 return(0);
  100         }
  101 
  102         /*
  103          * RealTek PHY doesn't have vendor/device ID registers:
  104          * the rl driver fakes up a return value of all zeros.
  105          */
  106         if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 ||
  107             MII_MODEL(ma->mii_id2) != 0)
  108                 return (ENXIO);
  109 
  110         /*
  111          * Make sure the parent is an `rl' or an `re'.
  112          */
  113         if (strcmp(device_get_name(parent), "rl") != 0 &&
  114             strcmp(device_get_name(parent), "re") != 0)
  115                 return (ENXIO);
  116 
  117         device_set_desc(dev, "RealTek internal media interface");
  118 
  119         return (0);
  120 }
  121 
  122 static int
  123 rlphy_attach(dev)
  124         device_t                dev;
  125 {
  126         struct mii_softc        *sc;
  127         struct mii_attach_args  *ma;
  128         struct mii_data         *mii;
  129 
  130         sc = device_get_softc(dev);
  131         ma = device_get_ivars(dev);
  132         sc->mii_dev = device_get_parent(dev);
  133         mii = device_get_softc(sc->mii_dev);
  134 
  135         /*
  136          * The RealTek PHY can never be isolated, so never allow non-zero
  137          * instances!
  138          */
  139         if (mii->mii_instance != 0) {
  140                 device_printf(dev, "ignoring this PHY, non-zero instance\n");
  141                 return(ENXIO);
  142         }
  143 
  144         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  145 
  146         sc->mii_inst = mii->mii_instance;
  147         sc->mii_phy = ma->mii_phyno;
  148         sc->mii_service = rlphy_service;
  149         sc->mii_pdata = mii;
  150         mii->mii_instance++;
  151 
  152         sc->mii_flags |= MIIF_NOISOLATE;
  153 
  154 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  155 
  156 #if 0 /* See above. */
  157         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
  158             BMCR_ISO);
  159 #endif
  160 
  161         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
  162             BMCR_LOOP|BMCR_S100);
  163 
  164         mii_phy_reset(sc);
  165 
  166         sc->mii_capabilities =
  167             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  168         device_printf(dev, " ");
  169         mii_add_media(sc);
  170         printf("\n");
  171 #undef ADD
  172         MIIBUS_MEDIAINIT(sc->mii_dev);
  173         return(0);
  174 }
  175 
  176 static int
  177 rlphy_service(sc, mii, cmd)
  178         struct mii_softc *sc;
  179         struct mii_data *mii;
  180         int cmd;
  181 {
  182         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  183 
  184         /*
  185          * We can't isolate the RealTek PHY, so it has to be the only one!
  186          */
  187         if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  188                 panic("rlphy_service: can't isolate RealTek PHY");
  189 
  190         switch (cmd) {
  191         case MII_POLLSTAT:
  192                 break;
  193 
  194         case MII_MEDIACHG:
  195                 /*
  196                  * If the interface is not up, don't do anything.
  197                  */
  198                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  199                         break;
  200 
  201                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  202                 case IFM_AUTO:
  203                         /*
  204                          * If we're already in auto mode, just return.
  205                          */
  206                         if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
  207                                 return (0);
  208                         (void) mii_phy_auto(sc);
  209                         break;
  210                 case IFM_100_T4:
  211                         /*
  212                          * XXX Not supported as a manual setting right now.
  213                          */
  214                         return (EINVAL);
  215                 default:
  216                         /*
  217                          * BMCR data is stored in the ifmedia entry.
  218                          */
  219                         PHY_WRITE(sc, MII_ANAR,
  220                             mii_anar(ife->ifm_media));
  221                         PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
  222                 }
  223                 break;
  224 
  225         case MII_TICK:
  226                 /*
  227                  * Is the interface even up?
  228                  */
  229                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  230                         return (0);
  231 
  232                 /*
  233                  * Only used for autonegotiation.
  234                  */
  235                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
  236                         break;
  237 
  238                 /*
  239                  * The RealTek PHY's autonegotiation doesn't need to be
  240                  * kicked; it continues in the background.
  241                  */
  242                 break;
  243         }
  244 
  245         /* Update the media status. */
  246         rlphy_status(sc);
  247 
  248         /* Callback if something changed. */
  249         mii_phy_update(sc, cmd);
  250         return (0);
  251 }
  252 
  253 static void
  254 rlphy_status(phy)
  255         struct mii_softc *phy;
  256 {
  257         struct mii_data *mii = phy->mii_pdata;
  258         int bmsr, bmcr, anlpar;
  259         device_t                parent;
  260 
  261         mii->mii_media_status = IFM_AVALID;
  262         mii->mii_media_active = IFM_ETHER;
  263 
  264         bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR);
  265         if (bmsr & BMSR_LINK)
  266                 mii->mii_media_status |= IFM_ACTIVE;
  267 
  268         bmcr = PHY_READ(phy, MII_BMCR);
  269         if (bmcr & BMCR_ISO) {
  270                 mii->mii_media_active |= IFM_NONE;
  271                 mii->mii_media_status = 0;
  272                 return;
  273         }
  274 
  275         if (bmcr & BMCR_LOOP)
  276                 mii->mii_media_active |= IFM_LOOP;
  277 
  278         if (bmcr & BMCR_AUTOEN) {
  279                 /*
  280                  * NWay autonegotiation takes the highest-order common
  281                  * bit of the ANAR and ANLPAR (i.e. best media advertised
  282                  * both by us and our link partner).
  283                  */
  284                 if ((bmsr & BMSR_ACOMP) == 0) {
  285                         /* Erg, still trying, I guess... */
  286                         mii->mii_media_active |= IFM_NONE;
  287                         return;
  288                 }
  289 
  290                 if ((anlpar = PHY_READ(phy, MII_ANAR) &
  291                     PHY_READ(phy, MII_ANLPAR))) {
  292                         if (anlpar & ANLPAR_T4)
  293                                 mii->mii_media_active |= IFM_100_T4;
  294                         else if (anlpar & ANLPAR_TX_FD)
  295                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  296                         else if (anlpar & ANLPAR_TX)
  297                                 mii->mii_media_active |= IFM_100_TX;
  298                         else if (anlpar & ANLPAR_10_FD)
  299                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
  300                         else if (anlpar & ANLPAR_10)
  301                                 mii->mii_media_active |= IFM_10_T;
  302                         else
  303                                 mii->mii_media_active |= IFM_NONE; 
  304                         return;
  305                 }
  306                 /*
  307                  * If the other side doesn't support NWAY, then the
  308                  * best we can do is determine if we have a 10Mbps or
  309                  * 100Mbps link. There's no way to know if the link 
  310                  * is full or half duplex, so we default to half duplex
  311                  * and hope that the user is clever enough to manually
  312                  * change the media settings if we're wrong.
  313                  */
  314 
  315 
  316                 /*
  317                  * The RealTek PHY supports non-NWAY link speed
  318                  * detection, however it does not report the link
  319                  * detection results via the ANLPAR or BMSR registers.
  320                  * (What? RealTek doesn't do things the way everyone
  321                  * else does? I'm just shocked, shocked I tell you.)
  322                  * To determine the link speed, we have to do one
  323                  * of two things:
  324                  *
  325                  * - If this is a standalone RealTek RTL8201(L) PHY,
  326                  *   we can determine the link speed by testing bit 0
  327                  *   in the magic, vendor-specific register at offset
  328                  *   0x19.
  329                  *
  330                  * - If this is a RealTek MAC with integrated PHY, we
  331                  *   can test the 'SPEED10' bit of the MAC's media status
  332                  *   register.
  333                  */
  334                 parent = device_get_parent(phy->mii_dev);
  335                 if (strcmp(device_get_name(parent), "rl") != 0) {
  336                         if (PHY_READ(phy, 0x0019) & 0x01)
  337                                 mii->mii_media_active |= IFM_100_TX;
  338                         else
  339                                 mii->mii_media_active |= IFM_10_T;
  340                 } else {
  341                         if (PHY_READ(phy, RL_MEDIASTAT) &
  342                             RL_MEDIASTAT_SPEED10)
  343                                 mii->mii_media_active |= IFM_10_T;
  344                         else
  345                                 mii->mii_media_active |= IFM_100_TX;
  346                 }
  347 
  348         } else
  349                 mii->mii_media_active = mii_media_from_bmcr(bmcr);
  350 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/rlphy.c

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sys/dev/mii/rlphy.c
