xmphy.c

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    1 /*-
    2  * Copyright (c) 2000
    3  *      Bill Paul <wpaul@ee.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 the XaQti XMAC II's internal PHY. This is sort of
   38  * like a 10/100 PHY, except the only thing we're really autoselecting
   39  * here is full/half duplex. Speed is always 1000mbps.
   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 
   49 #include <net/if.h>
   50 #include <net/if_media.h>
   51 
   52 #include <dev/mii/mii.h>
   53 #include <dev/mii/miivar.h>
   54 #include "miidevs.h"
   55 
   56 #include <dev/mii/xmphyreg.h>
   57 
   58 #include "miibus_if.h"
   59 
   60 static int xmphy_probe(device_t);
   61 static int xmphy_attach(device_t);
   62 
   63 static device_method_t xmphy_methods[] = {
   64         /* device interface */
   65         DEVMETHOD(device_probe,         xmphy_probe),
   66         DEVMETHOD(device_attach,        xmphy_attach),
   67         DEVMETHOD(device_detach,        mii_phy_detach),
   68         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   69         { 0, 0 }
   70 };
   71 
   72 static devclass_t xmphy_devclass;
   73 
   74 static driver_t xmphy_driver = {
   75         "xmphy",
   76         xmphy_methods,
   77         sizeof(struct mii_softc)
   78 };
   79 
   80 DRIVER_MODULE(xmphy, miibus, xmphy_driver, xmphy_devclass, 0, 0);
   81 
   82 static int      xmphy_service(struct mii_softc *, struct mii_data *, int);
   83 static void     xmphy_status(struct mii_softc *);
   84 static int      xmphy_mii_phy_auto(struct mii_softc *);
   85 
   86 static const struct mii_phydesc xmphys[] = {
   87         { MII_OUI_xxXAQTI, MII_MODEL_XAQTI_XMACII, MII_STR_XAQTI_XMACII },
   88         MII_PHY_DESC(JATO, BASEX),
   89         MII_PHY_END
   90 };
   91 
   92 static int
   93 xmphy_probe(device_t dev)
   94 {
   95 
   96         return (mii_phy_dev_probe(dev, xmphys, BUS_PROBE_DEFAULT));
   97 }
   98 
   99 static int
  100 xmphy_attach(device_t dev)
  101 {
  102         struct mii_softc *sc;
  103         struct mii_attach_args *ma;
  104         struct mii_data *mii;
  105         const char *sep = "";
  106 
  107         sc = device_get_softc(dev);
  108         ma = device_get_ivars(dev);
  109         sc->mii_dev = device_get_parent(dev);
  110         mii = device_get_softc(sc->mii_dev);
  111         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  112 
  113         sc->mii_inst = mii->mii_instance;
  114         sc->mii_phy = ma->mii_phyno;
  115         sc->mii_service = xmphy_service;
  116         sc->mii_pdata = mii;
  117 
  118         sc->mii_flags |= MIIF_NOISOLATE;
  119         mii->mii_instance++;
  120 
  121 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  122 #define PRINT(s)        printf("%s%s", sep, s); sep = ", "
  123 
  124         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
  125             BMCR_ISO);
  126 #if 0
  127         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
  128             BMCR_LOOP|BMCR_S100);
  129 #endif
  130 
  131         mii_phy_reset(sc);
  132 
  133         device_printf(dev, " ");
  134         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst),
  135             XMPHY_BMCR_FDX);
  136         PRINT("1000baseSX");
  137         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst), 0);
  138         PRINT("1000baseSX-FDX");
  139         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
  140         PRINT("auto");
  141 
  142         printf("\n");
  143 #undef ADD
  144 #undef PRINT
  145 
  146         MIIBUS_MEDIAINIT(sc->mii_dev);
  147         return (0);
  148 }
  149 
  150 static int
  151 xmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  152 {
  153         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  154         int reg;
  155 
  156         switch (cmd) {
  157         case MII_POLLSTAT:
  158                 /*
  159                  * If we're not polling our PHY instance, just return.
  160                  */
  161                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  162                         return (0);
  163                 break;
  164 
  165         case MII_MEDIACHG:
  166                 /*
  167                  * If the media indicates a different PHY instance,
  168                  * isolate ourselves.
  169                  */
  170                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  171                         reg = PHY_READ(sc, MII_BMCR);
  172                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  173                         return (0);
  174                 }
  175 
  176                 /*
  177                  * If the interface is not up, don't do anything.
  178                  */
  179                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  180                         break;
  181 
  182                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  183                 case IFM_AUTO:
  184 #ifdef foo
  185                         /*
  186                          * If we're already in auto mode, just return.
  187                          */
  188                         if (PHY_READ(sc, XMPHY_MII_BMCR) & XMPHY_BMCR_AUTOEN)
  189                                 return (0);
  190 #endif
  191                         (void) xmphy_mii_phy_auto(sc);
  192                         break;
  193                 case IFM_1000_SX:
  194                         mii_phy_reset(sc);
  195                         if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
  196                                 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_FDX);
  197                                 PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX);
  198                         } else {
  199                                 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_HDX);
  200                                 PHY_WRITE(sc, XMPHY_MII_BMCR, 0);
  201                         }
  202                         break;
  203                 case IFM_100_T4:
  204                 case IFM_100_TX:
  205                 case IFM_10_T:
  206                 default:
  207                         return (EINVAL);
  208                 }
  209                 break;
  210 
  211         case MII_TICK:
  212                 /*
  213                  * If we're not currently selected, just return.
  214                  */
  215                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  216                         return (0);
  217 
  218                 /*
  219                  * Is the interface even up?
  220                  */
  221                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  222                         return (0);
  223 
  224                 /*
  225                  * Only used for autonegotiation.
  226                  */
  227                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
  228                         break;
  229 
  230                 /*
  231                  * Check to see if we have link.  If we do, we don't
  232                  * need to restart the autonegotiation process.  Read
  233                  * the BMSR twice in case it's latched.
  234                  */
  235                 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  236                 if (reg & BMSR_LINK)
  237                         break;
  238 
  239                 /*
  240                  * Only retry autonegotiation every 5 seconds.
  241                  */
  242                 if (++sc->mii_ticks <= MII_ANEGTICKS)
  243                         break;
  244 
  245                 sc->mii_ticks = 0;
  246 
  247                 mii_phy_reset(sc);
  248                 xmphy_mii_phy_auto(sc);
  249                 return (0);
  250         }
  251 
  252         /* Update the media status. */
  253         xmphy_status(sc);
  254 
  255         /* Callback if something changed. */
  256         mii_phy_update(sc, cmd);
  257         return (0);
  258 }
  259 
  260 static void
  261 xmphy_status(struct mii_softc *sc)
  262 {
  263         struct mii_data *mii = sc->mii_pdata;
  264         int bmsr, bmcr, anlpar;
  265 
  266         mii->mii_media_status = IFM_AVALID;
  267         mii->mii_media_active = IFM_ETHER;
  268 
  269         bmsr = PHY_READ(sc, XMPHY_MII_BMSR) |
  270             PHY_READ(sc, XMPHY_MII_BMSR);
  271         if (bmsr & XMPHY_BMSR_LINK)
  272                 mii->mii_media_status |= IFM_ACTIVE;
  273 
  274         /* Do dummy read of extended status register. */
  275         bmcr = PHY_READ(sc, XMPHY_MII_EXTSTS);
  276 
  277         bmcr = PHY_READ(sc, XMPHY_MII_BMCR);
  278 
  279         if (bmcr & XMPHY_BMCR_LOOP)
  280                 mii->mii_media_active |= IFM_LOOP;
  281 
  282 
  283         if (bmcr & XMPHY_BMCR_AUTOEN) {
  284                 if ((bmsr & XMPHY_BMSR_ACOMP) == 0) {
  285                         if (bmsr & XMPHY_BMSR_LINK) {
  286                                 mii->mii_media_active |= IFM_1000_SX|IFM_HDX;
  287                                 return;
  288                         }
  289                         /* Erg, still trying, I guess... */
  290                         mii->mii_media_active |= IFM_NONE;
  291                         return;
  292                 }
  293 
  294                 mii->mii_media_active |= IFM_1000_SX;
  295                 anlpar = PHY_READ(sc, XMPHY_MII_ANAR) &
  296                     PHY_READ(sc, XMPHY_MII_ANLPAR);
  297                 if (anlpar & XMPHY_ANLPAR_FDX)
  298                         mii->mii_media_active |= IFM_FDX;
  299                 else
  300                         mii->mii_media_active |= IFM_HDX;
  301                 return;
  302         }
  303 
  304         mii->mii_media_active |= IFM_1000_SX;
  305         if (bmcr & XMPHY_BMCR_FDX)
  306                 mii->mii_media_active |= IFM_FDX;
  307         else
  308                 mii->mii_media_active |= IFM_HDX;
  309 }
  310 
  311 static int
  312 xmphy_mii_phy_auto(struct mii_softc *mii)
  313 {
  314         int anar = 0;
  315 
  316         anar = PHY_READ(mii, XMPHY_MII_ANAR);
  317         anar |= XMPHY_ANAR_FDX|XMPHY_ANAR_HDX;
  318         PHY_WRITE(mii, XMPHY_MII_ANAR, anar);
  319         DELAY(1000);
  320         PHY_WRITE(mii, XMPHY_MII_BMCR,
  321             XMPHY_BMCR_AUTOEN | XMPHY_BMCR_STARTNEG);
  322 
  323         return (EJUSTRETURN);
  324 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/xmphy.c

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