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         DEVMETHOD_END
   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_PHY_DESC(xxJATO, BASEX),
   88         MII_PHY_DESC(xxXAQTI, XMACII),
   89         MII_PHY_END
   90 };
   91 
   92 static const struct mii_phy_funcs xmphy_funcs = {
   93         xmphy_service,
   94         xmphy_status,
   95         mii_phy_reset
   96 };
   97 
   98 static int
   99 xmphy_probe(device_t dev)
  100 {
  101 
  102         return (mii_phy_dev_probe(dev, xmphys, BUS_PROBE_DEFAULT));
  103 }
  104 
  105 static int
  106 xmphy_attach(device_t dev)
  107 {
  108         struct mii_softc *sc;
  109         const char *sep = "";
  110 
  111         sc = device_get_softc(dev);
  112 
  113         mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
  114             &xmphy_funcs, 0);
  115         sc->mii_anegticks = MII_ANEGTICKS;
  116 
  117         PHY_RESET(sc);
  118 
  119 #define ADD(m, c)       ifmedia_add(&sc->mii_pdata->mii_media, (m), (c), NULL)
  120 #define PRINT(s)        printf("%s%s", sep, s); sep = ", "
  121 
  122         device_printf(dev, " ");
  123         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst),
  124             XMPHY_BMCR_FDX);
  125         PRINT("1000baseSX");
  126         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst), 0);
  127         PRINT("1000baseSX-FDX");
  128         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
  129         PRINT("auto");
  130 
  131         printf("\n");
  132 
  133 #undef ADD
  134 #undef PRINT
  135 
  136         MIIBUS_MEDIAINIT(sc->mii_dev);
  137         return (0);
  138 }
  139 
  140 static int
  141 xmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  142 {
  143         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  144         int reg;
  145 
  146         switch (cmd) {
  147         case MII_POLLSTAT:
  148                 break;
  149 
  150         case MII_MEDIACHG:
  151                 /*
  152                  * If the interface is not up, don't do anything.
  153                  */
  154                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  155                         break;
  156 
  157                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  158                 case IFM_AUTO:
  159 #ifdef foo
  160                         /*
  161                          * If we're already in auto mode, just return.
  162                          */
  163                         if (PHY_READ(sc, XMPHY_MII_BMCR) & XMPHY_BMCR_AUTOEN)
  164                                 return (0);
  165 #endif
  166                         (void)xmphy_mii_phy_auto(sc);
  167                         break;
  168                 case IFM_1000_SX:
  169                         PHY_RESET(sc);
  170                         if ((ife->ifm_media & IFM_FDX) != 0) {
  171                                 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_FDX);
  172                                 PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX);
  173                         } else {
  174                                 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_HDX);
  175                                 PHY_WRITE(sc, XMPHY_MII_BMCR, 0);
  176                         }
  177                         break;
  178                 default:
  179                         return (EINVAL);
  180                 }
  181                 break;
  182 
  183         case MII_TICK:
  184                 /*
  185                  * Is the interface even up?
  186                  */
  187                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  188                         return (0);
  189 
  190                 /*
  191                  * Only used for autonegotiation.
  192                  */
  193                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
  194                         break;
  195 
  196                 /*
  197                  * Check to see if we have link.  If we do, we don't
  198                  * need to restart the autonegotiation process.  Read
  199                  * the BMSR twice in case it's latched.
  200                  */
  201                 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  202                 if (reg & BMSR_LINK)
  203                         break;
  204 
  205                 /* Only retry autonegotiation every mii_anegticks seconds. */
  206                 if (sc->mii_ticks <= sc->mii_anegticks)
  207                         break;
  208 
  209                 sc->mii_ticks = 0;
  210 
  211                 PHY_RESET(sc);
  212                 xmphy_mii_phy_auto(sc);
  213                 return (0);
  214         }
  215 
  216         /* Update the media status. */
  217         xmphy_status(sc);
  218 
  219         /* Callback if something changed. */
  220         mii_phy_update(sc, cmd);
  221         return (0);
  222 }
  223 
  224 static void
  225 xmphy_status(struct mii_softc *sc)
  226 {
  227         struct mii_data *mii = sc->mii_pdata;
  228         int bmsr, bmcr, anlpar;
  229 
  230         mii->mii_media_status = IFM_AVALID;
  231         mii->mii_media_active = IFM_ETHER;
  232 
  233         bmsr = PHY_READ(sc, XMPHY_MII_BMSR) |
  234             PHY_READ(sc, XMPHY_MII_BMSR);
  235         if (bmsr & XMPHY_BMSR_LINK)
  236                 mii->mii_media_status |= IFM_ACTIVE;
  237 
  238         /* Do dummy read of extended status register. */
  239         bmcr = PHY_READ(sc, XMPHY_MII_EXTSTS);
  240 
  241         bmcr = PHY_READ(sc, XMPHY_MII_BMCR);
  242 
  243         if (bmcr & XMPHY_BMCR_LOOP)
  244                 mii->mii_media_active |= IFM_LOOP;
  245 
  246         if (bmcr & XMPHY_BMCR_AUTOEN) {
  247                 if ((bmsr & XMPHY_BMSR_ACOMP) == 0) {
  248                         if (bmsr & XMPHY_BMSR_LINK) {
  249                                 mii->mii_media_active |= IFM_1000_SX|IFM_HDX;
  250                                 return;
  251                         }
  252                         /* Erg, still trying, I guess... */
  253                         mii->mii_media_active |= IFM_NONE;
  254                         return;
  255                 }
  256 
  257                 mii->mii_media_active |= IFM_1000_SX;
  258                 anlpar = PHY_READ(sc, XMPHY_MII_ANAR) &
  259                     PHY_READ(sc, XMPHY_MII_ANLPAR);
  260                 if (anlpar & XMPHY_ANLPAR_FDX)
  261                         mii->mii_media_active |= IFM_FDX;
  262                 else
  263                         mii->mii_media_active |= IFM_HDX;
  264                 return;
  265         }
  266 
  267         mii->mii_media_active |= IFM_1000_SX;
  268         if (bmcr & XMPHY_BMCR_FDX)
  269                 mii->mii_media_active |= IFM_FDX;
  270         else
  271                 mii->mii_media_active |= IFM_HDX;
  272 }
  273 
  274 static int
  275 xmphy_mii_phy_auto(struct mii_softc *mii)
  276 {
  277         int anar = 0;
  278 
  279         anar = PHY_READ(mii, XMPHY_MII_ANAR);
  280         anar |= XMPHY_ANAR_FDX|XMPHY_ANAR_HDX;
  281         PHY_WRITE(mii, XMPHY_MII_ANAR, anar);
  282         DELAY(1000);
  283         PHY_WRITE(mii, XMPHY_MII_BMCR,
  284             XMPHY_BMCR_AUTOEN | XMPHY_BMCR_STARTNEG);
  285 
  286         return (EJUSTRETURN);
  287 }
Cache object: 8e5cd6df92ace4f298daec38ee950a90
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/xmphy.c

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