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: releng/6.0/sys/dev/mii/xmphy.c 139749 2005-01-06 01:43:34Z imp $");
   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 int
   87 xmphy_probe(dev)
   88         device_t                dev;
   89 {
   90         struct mii_attach_args *ma;
   91 
   92         ma = device_get_ivars(dev);
   93 
   94         if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxXAQTI &&
   95             MII_MODEL(ma->mii_id2) == MII_MODEL_XAQTI_XMACII) {
   96                 device_set_desc(dev, MII_STR_XAQTI_XMACII);
   97                 return(0);
   98         }
   99 
  100         if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_JATO &&
  101             MII_MODEL(ma->mii_id2) == MII_MODEL_JATO_BASEX) {
  102                 device_set_desc(dev, MII_STR_JATO_BASEX);
  103                 return(0);
  104         }
  105 
  106         return(ENXIO);
  107 }
  108 
  109 static int
  110 xmphy_attach(dev)
  111         device_t                dev;
  112 {
  113         struct mii_softc *sc;
  114         struct mii_attach_args *ma;
  115         struct mii_data *mii;
  116         const char *sep = "";
  117 
  118         sc = device_get_softc(dev);
  119         ma = device_get_ivars(dev);
  120         sc->mii_dev = device_get_parent(dev);
  121         mii = device_get_softc(sc->mii_dev);
  122         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  123 
  124         sc->mii_inst = mii->mii_instance;
  125         sc->mii_phy = ma->mii_phyno;
  126         sc->mii_service = xmphy_service;
  127         sc->mii_pdata = mii;
  128 
  129         sc->mii_flags |= MIIF_NOISOLATE;
  130         mii->mii_instance++;
  131 
  132 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  133 #define PRINT(s)        printf("%s%s", sep, s); sep = ", "
  134 
  135         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
  136             BMCR_ISO);
  137 #if 0
  138         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
  139             BMCR_LOOP|BMCR_S100);
  140 #endif
  141 
  142         mii_phy_reset(sc);
  143 
  144         device_printf(dev, " ");
  145         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst),
  146             XMPHY_BMCR_FDX);
  147         PRINT("1000baseSX");
  148         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst), 0);
  149         PRINT("1000baseSX-FDX");
  150         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
  151         PRINT("auto");
  152 
  153         printf("\n");
  154 #undef ADD
  155 #undef PRINT
  156 
  157         MIIBUS_MEDIAINIT(sc->mii_dev);
  158         return(0);
  159 }
  160 
  161 static int
  162 xmphy_service(sc, mii, cmd)
  163         struct mii_softc *sc;
  164         struct mii_data *mii;
  165         int cmd;
  166 {
  167         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  168         int reg;
  169 
  170         switch (cmd) {
  171         case MII_POLLSTAT:
  172                 /*
  173                  * If we're not polling our PHY instance, just return.
  174                  */
  175                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  176                         return (0);
  177                 break;
  178 
  179         case MII_MEDIACHG:
  180                 /*
  181                  * If the media indicates a different PHY instance,
  182                  * isolate ourselves.
  183                  */
  184                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  185                         reg = PHY_READ(sc, MII_BMCR);
  186                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  187                         return (0);
  188                 }
  189 
  190                 /*
  191                  * If the interface is not up, don't do anything.
  192                  */
  193                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  194                         break;
  195 
  196                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  197                 case IFM_AUTO:
  198 #ifdef foo
  199                         /*
  200                          * If we're already in auto mode, just return.
  201                          */
  202                         if (PHY_READ(sc, XMPHY_MII_BMCR) & XMPHY_BMCR_AUTOEN)
  203                                 return (0);
  204 #endif
  205                         (void) xmphy_mii_phy_auto(sc);
  206                         break;
  207                 case IFM_1000_SX:
  208                         mii_phy_reset(sc);
  209                         if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
  210                                 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_FDX);
  211                                 PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX);
  212                         } else {
  213                                 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_HDX);
  214                                 PHY_WRITE(sc, XMPHY_MII_BMCR, 0);
  215                         }
  216                         break;
  217                 case IFM_100_T4:
  218                 case IFM_100_TX:
  219                 case IFM_10_T:
  220                 default:
  221                         return (EINVAL);
  222                 }
  223                 break;
  224 
  225         case MII_TICK:
  226                 /*
  227                  * If we're not currently selected, just return.
  228                  */
  229                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  230                         return (0);
  231 
  232                 /*
  233                  * Is the interface even up?
  234                  */
  235                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  236                         return (0);
  237 
  238                 /*
  239                  * Only used for autonegotiation.
  240                  */
  241                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
  242                         break;
  243 
  244                 /*
  245                  * Check to see if we have link.  If we do, we don't
  246                  * need to restart the autonegotiation process.  Read
  247                  * the BMSR twice in case it's latched.
  248                  */
  249                 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  250                 if (reg & BMSR_LINK)
  251                         break;
  252 
  253                 /*
  254                  * Only retry autonegotiation every 5 seconds.
  255                  */
  256                 if (++sc->mii_ticks <= 5)
  257                         break;
  258                 
  259                 sc->mii_ticks = 0;
  260 
  261                 mii_phy_reset(sc);
  262                 xmphy_mii_phy_auto(sc);
  263                 return(0);
  264         }
  265 
  266         /* Update the media status. */
  267         xmphy_status(sc);
  268 
  269         /* Callback if something changed. */
  270         mii_phy_update(sc, cmd);
  271         return (0);
  272 }
  273 
  274 static void
  275 xmphy_status(sc)
  276         struct mii_softc *sc;
  277 {
  278         struct mii_data *mii = sc->mii_pdata;
  279         int bmsr, bmcr, anlpar;
  280 
  281         mii->mii_media_status = IFM_AVALID;
  282         mii->mii_media_active = IFM_ETHER;
  283 
  284         bmsr = PHY_READ(sc, XMPHY_MII_BMSR) |
  285             PHY_READ(sc, XMPHY_MII_BMSR);
  286         if (bmsr & XMPHY_BMSR_LINK)
  287                 mii->mii_media_status |= IFM_ACTIVE;
  288 
  289         /* Do dummy read of extended status register. */
  290         bmcr = PHY_READ(sc, XMPHY_MII_EXTSTS);
  291 
  292         bmcr = PHY_READ(sc, XMPHY_MII_BMCR);
  293 
  294         if (bmcr & XMPHY_BMCR_LOOP)
  295                 mii->mii_media_active |= IFM_LOOP;
  296 
  297 
  298         if (bmcr & XMPHY_BMCR_AUTOEN) {
  299                 if ((bmsr & XMPHY_BMSR_ACOMP) == 0) {
  300                         if (bmsr & XMPHY_BMSR_LINK) {
  301                                 mii->mii_media_active |= IFM_1000_SX|IFM_HDX;
  302                                 return;
  303                         }
  304                         /* Erg, still trying, I guess... */
  305                         mii->mii_media_active |= IFM_NONE;
  306                         return;
  307                 }
  308 
  309                 mii->mii_media_active |= IFM_1000_SX;
  310                 anlpar = PHY_READ(sc, XMPHY_MII_ANAR) &
  311                     PHY_READ(sc, XMPHY_MII_ANLPAR);
  312                 if (anlpar & XMPHY_ANLPAR_FDX)
  313                         mii->mii_media_active |= IFM_FDX;
  314                 else
  315                         mii->mii_media_active |= IFM_HDX;
  316                 return;
  317         }
  318 
  319         mii->mii_media_active |= IFM_1000_SX;
  320         if (bmcr & XMPHY_BMCR_FDX)
  321                 mii->mii_media_active |= IFM_FDX;
  322         else
  323                 mii->mii_media_active |= IFM_HDX;
  324 
  325         return;
  326 }
  327 
  328 
  329 static int
  330 xmphy_mii_phy_auto(mii)
  331         struct mii_softc *mii;
  332 {
  333         int anar = 0;
  334 
  335         anar = PHY_READ(mii, XMPHY_MII_ANAR);
  336         anar |= XMPHY_ANAR_FDX|XMPHY_ANAR_HDX;
  337         PHY_WRITE(mii, XMPHY_MII_ANAR, anar);
  338         DELAY(1000);
  339         PHY_WRITE(mii, XMPHY_MII_BMCR,
  340             XMPHY_BMCR_AUTOEN | XMPHY_BMCR_STARTNEG);
  341 
  342         return (EJUSTRETURN);
  343 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/xmphy.c

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sys/dev/mii/xmphy.c
