rlphy.c

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    1 /*      $OpenBSD: rlphy.c,v 1.23 2006/05/16 02:24:45 brad Exp $ */
    2 
    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  * $FreeBSD: src/sys/dev/mii/rlphy.c,v 1.2.2.4 2002/11/08 21:53:49 semenu Exp $
   35  */
   36 
   37 /*
   38  * driver for RealTek 8139 internal PHYs
   39  */
   40 
   41 #include <sys/param.h>
   42 #include <sys/systm.h>
   43 #include <sys/kernel.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 #include <net/if_poll.h>
   51 
   52 #include "mii.h"
   53 #include "miivar.h"
   54 #include "miidevs.h"
   55 
   56 #include "../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 static int      rlphy_service(struct mii_softc *, struct mii_data *, int);
   63 static void     rlphy_status(struct mii_softc *);
   64 
   65 static device_method_t rlphy_methods[] = {
   66         /* device interface */
   67         DEVMETHOD(device_probe,         rlphy_probe),
   68         DEVMETHOD(device_attach,        rlphy_attach),
   69         DEVMETHOD(device_detach,        ukphy_detach),
   70         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   71         DEVMETHOD_END
   72 };
   73 
   74 static const struct mii_phydesc rlphys[] = {
   75         MII_PHYDESC(REALTEK,    RTL8201L),
   76         MII_PHYDESC(ICPLUS,     IP101),
   77         MII_PHYDESC_NULL
   78 };
   79 
   80 static devclass_t rlphy_devclass;
   81 
   82 static driver_t rlphy_driver = {
   83         "rlphy",
   84         rlphy_methods,
   85         sizeof(struct mii_softc)
   86 };
   87 
   88 DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, NULL, NULL);
   89 
   90 static int
   91 rlphy_probe(device_t dev)
   92 {
   93         struct mii_attach_args *ma = device_get_ivars(dev);
   94         const struct mii_phydesc *mpd;
   95         device_t parent;
   96 
   97         /*
   98          * A "real" phy should get preference, but on the 8139 there
   99          * is no phyid register.
  100          */
  101         mpd = mii_phy_match(ma, rlphys);
  102         if (mpd != NULL) {
  103                 device_set_desc(dev, mpd->mpd_name);
  104                 return (0);
  105         }
  106 
  107         /*
  108          * RealTek PHY doesn't have vendor/device ID registers:
  109          * the rl driver fakes up a return value of all zeros.
  110          */
  111         if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 ||
  112             MII_MODEL(ma->mii_id2) != 0)
  113                 return (ENXIO);
  114 
  115         parent = device_get_parent(device_get_parent(dev));
  116 
  117         /*
  118          * Make sure the parent is an `rl'.
  119          */
  120         if (strcmp(device_get_name(parent), "rl") != 0)
  121                 return (ENXIO);
  122 
  123         device_set_desc(dev, "RealTek internal media interface");
  124 
  125         return (0);
  126 }
  127 
  128 static int
  129 rlphy_attach(device_t dev)
  130 {
  131         struct mii_softc        *sc;
  132         struct mii_attach_args  *ma;
  133         struct mii_data         *mii;
  134 
  135         sc = device_get_softc(dev);
  136         ma = device_get_ivars(dev);
  137         mii_softc_init(sc, ma);
  138         sc->mii_dev = device_get_parent(dev);
  139         mii = device_get_softc(sc->mii_dev);
  140 
  141         /*
  142          * The RealTek PHY can never be isolated, so never allow non-zero
  143          * instances!
  144          */
  145         if (mii->mii_instance != 0) {
  146                 device_printf(dev, "ignoring this PHY, non-zero instance\n");
  147                 return(ENXIO);
  148         }
  149 
  150         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  151 
  152         sc->mii_inst = mii->mii_instance;
  153         sc->mii_service = rlphy_service;
  154         sc->mii_pdata = mii;
  155         mii->mii_instance++;
  156 
  157         sc->mii_flags |= MIIF_NOISOLATE;
  158 
  159 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  160 
  161 #if 0 /* See above. */
  162         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
  163             BMCR_ISO);
  164 #endif
  165 
  166         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
  167             MII_MEDIA_100_TX);
  168 
  169         mii_phy_reset(sc);
  170 
  171         /*
  172          * After PHY is reset, BMCR_AUTOEN will be cleared.
  173          * If it is *not* turned on here, mii_pollstat() will
  174          * lie about the active media until mii_mediachg() is
  175          * called(in rl_init()).
  176          */
  177         PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN);
  178 
  179         sc->mii_capabilities =
  180             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  181         device_printf(dev, " ");
  182         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
  183                 kprintf("no media present");
  184         else
  185                 mii_phy_add_media(sc);
  186         kprintf("\n");
  187 #undef ADD
  188         MIIBUS_MEDIAINIT(sc->mii_dev);
  189         return(0);
  190 }
  191 
  192 static int
  193 rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  194 {
  195         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  196 
  197         /*
  198          * We can't isolate the RealTek PHY, so it has to be the only one!
  199          */
  200         KASSERT(IFM_INST(ife->ifm_media) == sc->mii_inst,
  201                 ("rlphy_service: can't isolate RealTek PHY"));
  202 
  203         switch (cmd) {
  204         case MII_POLLSTAT:
  205                 break;
  206 
  207         case MII_MEDIACHG:
  208                 /*
  209                  * If the interface is not up, don't do anything.
  210                  */
  211                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  212                         break;
  213 
  214                 if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_T4) {
  215                         /*
  216                          * XXX Not supported as a manual setting right now.
  217                          */
  218                         return (EINVAL);
  219                 }
  220 
  221                 mii_phy_set_media(sc);
  222                 break;
  223 
  224         case MII_TICK:
  225                 /*
  226                  * Is the interface even up?
  227                  */
  228                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  229                         return (0);
  230 
  231                 /*
  232                  * Only used for autonegotiation.
  233                  */
  234                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
  235                         break;
  236 
  237                 /*
  238                  * The RealTek PHY's autonegotiation doesn't need to be
  239                  * kicked; it continues in the background.
  240                  */
  241                 break;
  242         }
  243 
  244         /* Update the media status. */
  245         rlphy_status(sc);
  246 
  247         /* Callback if something changed. */
  248         mii_phy_update(sc, cmd);
  249         return (0);
  250 }
  251 
  252 static void
  253 rlphy_status(struct mii_softc *sc)
  254 {
  255         struct mii_data *mii = sc->mii_pdata;
  256         int bmsr, bmcr, anlpar;
  257 
  258         mii->mii_media_status = IFM_AVALID;
  259         mii->mii_media_active = IFM_ETHER;
  260 
  261         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  262         if (bmsr & BMSR_LINK)
  263                 mii->mii_media_status |= IFM_ACTIVE;
  264 
  265         bmcr = PHY_READ(sc, MII_BMCR);
  266         if (bmcr & BMCR_ISO) {
  267                 mii->mii_media_active |= IFM_NONE;
  268                 mii->mii_media_status = 0;
  269                 return;
  270         }
  271 
  272         if (bmcr & BMCR_LOOP)
  273                 mii->mii_media_active |= IFM_LOOP;
  274 
  275         if (bmcr & BMCR_AUTOEN) {
  276                 device_t parent;
  277 
  278                 /*
  279                  * NWay autonegotiation takes the highest-order common
  280                  * bit of the ANAR and ANLPAR (i.e. best media advertised
  281                  * both by us and our link partner).
  282                  */
  283                 if ((bmsr & BMSR_ACOMP) == 0) {
  284                         /* Erg, still trying, I guess... */
  285                         mii->mii_media_active |= IFM_NONE;
  286                         return;
  287                 }
  288 
  289                 if ((anlpar = PHY_READ(sc, MII_ANAR) &
  290                     PHY_READ(sc, MII_ANLPAR))) {
  291                         if (anlpar & ANLPAR_T4)
  292                                 mii->mii_media_active |= IFM_100_T4;
  293                         else if (anlpar & ANLPAR_TX_FD)
  294                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  295                         else if (anlpar & ANLPAR_TX)
  296                                 mii->mii_media_active |= IFM_100_TX;
  297                         else if (anlpar & ANLPAR_10_FD)
  298                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
  299                         else if (anlpar & ANLPAR_10)
  300                                 mii->mii_media_active |= IFM_10_T;
  301                         else
  302                                 mii->mii_media_active |= IFM_NONE; 
  303                         return;
  304                 }
  305                 /*
  306                  * If the other side doesn't support NWAY, then the
  307                  * best we can do is determine if we have a 10Mbps or
  308                  * 100Mbps link. There's no way to know if the link 
  309                  * is full or half duplex, so we default to half duplex
  310                  * and hope that the user is clever enough to manually
  311                  * change the media settings if we're wrong.
  312                  */
  313 
  314                 /*
  315                  * The RealTek PHY supports non-NWAY link speed
  316                  * detection, however it does not report the link
  317                  * detection results via the ANLPAR or BMSR registers.
  318                  * (What? RealTek doesn't do things the way everyone
  319                  * else does? I'm just shocked, shocked I tell you.)
  320                  * To determine the link speed, we have to do one
  321                  * of two things:
  322                  *
  323                  * - If this is a standalone RealTek RTL8201(L) PHY,
  324                  *   we can determine the link speed by testing bit 0
  325                  *   in the magic, vendor-specific register at offset
  326                  *   0x19.
  327                  *
  328                  * - If this is a RealTek MAC with integrated PHY, we
  329                  *   can test the 'SPEED10' bit of the MAC's media status
  330                  *   register.
  331                  */
  332                 parent = device_get_parent(sc->mii_dev);
  333                 if (strcmp(device_get_name(parent), "rl") != 0) {
  334                         if (PHY_READ(sc, 0x0019) & 0x01)
  335                                 mii->mii_media_active |= IFM_100_TX;
  336                         else
  337                                 mii->mii_media_active |= IFM_10_T;
  338                 } else {
  339                         if (PHY_READ(sc, RL_MEDIASTAT) &
  340                             RL_MEDIASTAT_SPEED10)
  341                                 mii->mii_media_active |= IFM_10_T;
  342                         else
  343                                 mii->mii_media_active |= IFM_100_TX;
  344                 }
  345         } else {
  346                 mii->mii_media_active = mii->mii_media.ifm_cur->ifm_media;
  347         }
  348 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/netif/mii_layer/rlphy.c

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sys/dev/netif/mii_layer/rlphy.c
