xmphy.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-4-Clause
    3  *
    4  * Copyright (c) 2000
    5  *      Bill Paul <wpaul@ee.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 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD$");
   37 
   38 /*
   39  * driver for the XaQti XMAC II's internal PHY. This is sort of
   40  * like a 10/100 PHY, except the only thing we're really autoselecting
   41  * here is full/half duplex. Speed is always 1000mbps.
   42  */
   43 
   44 #include <sys/param.h>
   45 #include <sys/systm.h>
   46 #include <sys/kernel.h>
   47 #include <sys/module.h>
   48 #include <sys/socket.h>
   49 #include <sys/bus.h>
   50 
   51 #include <net/if.h>
   52 #include <net/if_media.h>
   53 
   54 #include <dev/mii/mii.h>
   55 #include <dev/mii/miivar.h>
   56 #include "miidevs.h"
   57 
   58 #include <dev/mii/xmphyreg.h>
   59 
   60 #include "miibus_if.h"
   61 
   62 static int xmphy_probe(device_t);
   63 static int xmphy_attach(device_t);
   64 
   65 static device_method_t xmphy_methods[] = {
   66         /* device interface */
   67         DEVMETHOD(device_probe,         xmphy_probe),
   68         DEVMETHOD(device_attach,        xmphy_attach),
   69         DEVMETHOD(device_detach,        mii_phy_detach),
   70         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   71         DEVMETHOD_END
   72 };
   73 
   74 static devclass_t xmphy_devclass;
   75 
   76 static driver_t xmphy_driver = {
   77         "xmphy",
   78         xmphy_methods,
   79         sizeof(struct mii_softc)
   80 };
   81 
   82 DRIVER_MODULE(xmphy, miibus, xmphy_driver, xmphy_devclass, 0, 0);
   83 
   84 static int      xmphy_service(struct mii_softc *, struct mii_data *, int);
   85 static void     xmphy_status(struct mii_softc *);
   86 static int      xmphy_mii_phy_auto(struct mii_softc *);
   87 
   88 static const struct mii_phydesc xmphys[] = {
   89         MII_PHY_DESC(xxJATO, BASEX),
   90         MII_PHY_DESC(xxXAQTI, XMACII),
   91         MII_PHY_END
   92 };
   93 
   94 static const struct mii_phy_funcs xmphy_funcs = {
   95         xmphy_service,
   96         xmphy_status,
   97         mii_phy_reset
   98 };
   99 
  100 static int
  101 xmphy_probe(device_t dev)
  102 {
  103 
  104         return (mii_phy_dev_probe(dev, xmphys, BUS_PROBE_DEFAULT));
  105 }
  106 
  107 static int
  108 xmphy_attach(device_t dev)
  109 {
  110         struct mii_softc *sc;
  111         const char *sep = "";
  112 
  113         sc = device_get_softc(dev);
  114 
  115         mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
  116             &xmphy_funcs, 0);
  117         sc->mii_anegticks = MII_ANEGTICKS;
  118 
  119         PHY_RESET(sc);
  120 
  121 #define ADD(m)          ifmedia_add(&sc->mii_pdata->mii_media, (m), 0, NULL)
  122 #define PRINT(s)        printf("%s%s", sep, s); sep = ", "
  123 
  124         device_printf(dev, " ");
  125         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst));
  126         PRINT("1000baseSX");
  127         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst));
  128         PRINT("1000baseSX-FDX");
  129         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst));
  130         PRINT("auto");
  131 
  132         printf("\n");
  133 
  134 #undef ADD
  135 #undef PRINT
  136 
  137         MIIBUS_MEDIAINIT(sc->mii_dev);
  138         return (0);
  139 }
  140 
  141 static int
  142 xmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  143 {
  144         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  145         int reg;
  146 
  147         switch (cmd) {
  148         case MII_POLLSTAT:
  149                 break;
  150 
  151         case MII_MEDIACHG:
  152                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  153                 case IFM_AUTO:
  154 #ifdef foo
  155                         /*
  156                          * If we're already in auto mode, just return.
  157                          */
  158                         if (PHY_READ(sc, XMPHY_MII_BMCR) & XMPHY_BMCR_AUTOEN)
  159                                 return (0);
  160 #endif
  161                         (void)xmphy_mii_phy_auto(sc);
  162                         break;
  163                 case IFM_1000_SX:
  164                         PHY_RESET(sc);
  165                         if ((ife->ifm_media & IFM_FDX) != 0) {
  166                                 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_FDX);
  167                                 PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX);
  168                         } else {
  169                                 PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_HDX);
  170                                 PHY_WRITE(sc, XMPHY_MII_BMCR, 0);
  171                         }
  172                         break;
  173                 default:
  174                         return (EINVAL);
  175                 }
  176                 break;
  177 
  178         case MII_TICK:
  179                 /*
  180                  * Only used for autonegotiation.
  181                  */
  182                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
  183                         break;
  184 
  185                 /*
  186                  * Check to see if we have link.  If we do, we don't
  187                  * need to restart the autonegotiation process.  Read
  188                  * the BMSR twice in case it's latched.
  189                  */
  190                 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  191                 if (reg & BMSR_LINK)
  192                         break;
  193 
  194                 /* Only retry autonegotiation every mii_anegticks seconds. */
  195                 if (sc->mii_ticks <= sc->mii_anegticks)
  196                         break;
  197 
  198                 sc->mii_ticks = 0;
  199 
  200                 PHY_RESET(sc);
  201                 xmphy_mii_phy_auto(sc);
  202                 return (0);
  203         }
  204 
  205         /* Update the media status. */
  206         xmphy_status(sc);
  207 
  208         /* Callback if something changed. */
  209         mii_phy_update(sc, cmd);
  210         return (0);
  211 }
  212 
  213 static void
  214 xmphy_status(struct mii_softc *sc)
  215 {
  216         struct mii_data *mii = sc->mii_pdata;
  217         int bmsr, bmcr, anlpar;
  218 
  219         mii->mii_media_status = IFM_AVALID;
  220         mii->mii_media_active = IFM_ETHER;
  221 
  222         bmsr = PHY_READ(sc, XMPHY_MII_BMSR) |
  223             PHY_READ(sc, XMPHY_MII_BMSR);
  224         if (bmsr & XMPHY_BMSR_LINK)
  225                 mii->mii_media_status |= IFM_ACTIVE;
  226 
  227         /* Do dummy read of extended status register. */
  228         bmcr = PHY_READ(sc, XMPHY_MII_EXTSTS);
  229 
  230         bmcr = PHY_READ(sc, XMPHY_MII_BMCR);
  231 
  232         if (bmcr & XMPHY_BMCR_LOOP)
  233                 mii->mii_media_active |= IFM_LOOP;
  234 
  235         if (bmcr & XMPHY_BMCR_AUTOEN) {
  236                 if ((bmsr & XMPHY_BMSR_ACOMP) == 0) {
  237                         if (bmsr & XMPHY_BMSR_LINK) {
  238                                 mii->mii_media_active |= IFM_1000_SX|IFM_HDX;
  239                                 return;
  240                         }
  241                         /* Erg, still trying, I guess... */
  242                         mii->mii_media_active |= IFM_NONE;
  243                         return;
  244                 }
  245 
  246                 mii->mii_media_active |= IFM_1000_SX;
  247                 anlpar = PHY_READ(sc, XMPHY_MII_ANAR) &
  248                     PHY_READ(sc, XMPHY_MII_ANLPAR);
  249                 if (anlpar & XMPHY_ANLPAR_FDX)
  250                         mii->mii_media_active |= IFM_FDX;
  251                 else
  252                         mii->mii_media_active |= IFM_HDX;
  253                 return;
  254         }
  255 
  256         mii->mii_media_active |= IFM_1000_SX;
  257         if (bmcr & XMPHY_BMCR_FDX)
  258                 mii->mii_media_active |= IFM_FDX;
  259         else
  260                 mii->mii_media_active |= IFM_HDX;
  261 }
  262 
  263 static int
  264 xmphy_mii_phy_auto(struct mii_softc *mii)
  265 {
  266         int anar = 0;
  267 
  268         anar = PHY_READ(mii, XMPHY_MII_ANAR);
  269         anar |= XMPHY_ANAR_FDX|XMPHY_ANAR_HDX;
  270         PHY_WRITE(mii, XMPHY_MII_ANAR, anar);
  271         DELAY(1000);
  272         PHY_WRITE(mii, XMPHY_MII_BMCR,
  273             XMPHY_BMCR_AUTOEN | XMPHY_BMCR_STARTNEG);
  274 
  275         return (EJUSTRETURN);
  276 }

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

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