The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      OpenBSD: lxtphy.c,v 1.5 2000/08/26 20:04:17 nate Exp    */
    2 /*      NetBSD: lxtphy.c,v 1.19 2000/02/02 23:34:57 thorpej Exp         */
    3 
    4 /*-
    5  * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software contributed to The NetBSD Foundation
    9  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   10  * NASA Ames Research Center.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. All advertising materials mentioning features or use of this software
   21  *    must display the following acknowledgement:
   22  *      This product includes software developed by the NetBSD
   23  *      Foundation, Inc. and its contributors.
   24  * 4. Neither the name of The NetBSD Foundation nor the names of its
   25  *    contributors may be used to endorse or promote products derived
   26  *    from this software without specific prior written permission.
   27  *
   28  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   29  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   30  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   31  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   32  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   33  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   34  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   35  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   36  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   37  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   38  * POSSIBILITY OF SUCH DAMAGE.
   39  */
   40 
   41 /*-
   42  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
   43  *
   44  * Redistribution and use in source and binary forms, with or without
   45  * modification, are permitted provided that the following conditions
   46  * are met:
   47  * 1. Redistributions of source code must retain the above copyright
   48  *    notice, this list of conditions and the following disclaimer.
   49  * 2. Redistributions in binary form must reproduce the above copyright
   50  *    notice, this list of conditions and the following disclaimer in the
   51  *    documentation and/or other materials provided with the distribution.
   52  * 3. All advertising materials mentioning features or use of this software
   53  *    must display the following acknowledgement:
   54  *      This product includes software developed by Manuel Bouyer.
   55  * 4. The name of the author may not be used to endorse or promote products
   56  *    derived from this software without specific prior written permission.
   57  *
   58  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   59  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   60  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   61  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   62  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   63  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   64  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   65  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   66  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   67  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   68  */
   69 
   70 #include <sys/cdefs.h>
   71 __FBSDID("$FreeBSD$");
   72 
   73 /*
   74  * driver for Level One's LXT-970 ethernet 10/100 PHY
   75  * datasheet from www.level1.com
   76  */
   77 
   78 #include <sys/param.h>
   79 #include <sys/systm.h>
   80 #include <sys/kernel.h>
   81 #include <sys/socket.h>
   82 #include <sys/errno.h>
   83 #include <sys/module.h>
   84 #include <sys/bus.h>
   85 
   86 #include <net/if.h>
   87 #include <net/if_media.h>
   88 
   89 #include <dev/mii/mii.h>
   90 #include <dev/mii/miivar.h>
   91 #include "miidevs.h"
   92 
   93 #include <dev/mii/lxtphyreg.h>
   94 
   95 #include "miibus_if.h"
   96 
   97 static int lxtphy_probe(device_t);
   98 static int lxtphy_attach(device_t);
   99 
  100 static device_method_t lxtphy_methods[] = {
  101         /* device interface */
  102         DEVMETHOD(device_probe,         lxtphy_probe),
  103         DEVMETHOD(device_attach,        lxtphy_attach),
  104         DEVMETHOD(device_detach,        mii_phy_detach),
  105         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  106         { 0, 0 }
  107 };
  108 
  109 static devclass_t lxtphy_devclass;
  110 
  111 static driver_t lxtphy_driver = {
  112         "lxtphy",
  113         lxtphy_methods,
  114         sizeof(struct mii_softc)
  115 };
  116 
  117 DRIVER_MODULE(lxtphy, miibus, lxtphy_driver, lxtphy_devclass, 0, 0);
  118 
  119 static int      lxtphy_service(struct mii_softc *, struct mii_data *, int);
  120 static void     lxtphy_status(struct mii_softc *);
  121 static void     lxtphy_set_tp(struct mii_softc *);
  122 static void     lxtphy_set_fx(struct mii_softc *);
  123 
  124 static const struct mii_phydesc lxtphys[] = {
  125         MII_PHY_DESC(xxLEVEL1, LXT970),
  126         MII_PHY_END
  127 };
  128 
  129 static int
  130 lxtphy_probe(device_t dev)
  131 {
  132 
  133         return (mii_phy_dev_probe(dev, lxtphys, BUS_PROBE_DEFAULT));
  134 }
  135 
  136 static int
  137 lxtphy_attach(device_t dev)
  138 {
  139         struct mii_softc *sc;
  140         struct mii_attach_args *ma;
  141         struct mii_data *mii;
  142         const char *nic;
  143 
  144         sc = device_get_softc(dev);
  145         ma = device_get_ivars(dev);
  146         sc->mii_dev = device_get_parent(dev);
  147         mii = device_get_softc(sc->mii_dev);
  148         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  149 
  150         sc->mii_inst = mii->mii_instance;
  151         sc->mii_phy = ma->mii_phyno;
  152         sc->mii_service = lxtphy_service;
  153         sc->mii_pdata = mii;
  154 
  155         mii->mii_instance++;
  156 
  157         mii_phy_reset(sc);
  158 
  159         sc->mii_capabilities =
  160             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  161         device_printf(dev, " ");
  162 
  163         /*
  164          * On Apple BMAC controllers, we end up in a weird state
  165          * of partially-completed autonegotiation on boot. So
  166          * force autonegotation to try again.
  167          */
  168         nic = device_get_name(device_get_parent(sc->mii_dev));
  169         if (strcmp(nic, "bm") == 0)
  170                 sc->mii_flags |= MIIF_FORCEANEG | MIIF_NOISOLATE;
  171 
  172 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  173         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, 0, sc->mii_inst),
  174             MII_MEDIA_100_TX);
  175         printf("100baseFX, ");
  176         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, IFM_FDX, sc->mii_inst),
  177             MII_MEDIA_100_TX_FDX);
  178         printf("100baseFX-FDX, ");
  179 #undef ADD
  180 
  181         mii_phy_add_media(sc);
  182         printf("\n");
  183 
  184         MIIBUS_MEDIAINIT(sc->mii_dev);
  185         return (0);
  186 }
  187 
  188 static int
  189 lxtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  190 {
  191         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  192         int reg;
  193 
  194         switch (cmd) {
  195         case MII_POLLSTAT:
  196                 /*
  197                  * If we're not polling our PHY instance, just return.
  198                  */
  199                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  200                         return (0);
  201                 break;
  202 
  203         case MII_MEDIACHG:
  204                 /*
  205                  * If the media indicates a different PHY instance,
  206                  * isolate ourselves.
  207                  */
  208                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  209                         reg = PHY_READ(sc, MII_BMCR);
  210                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  211                         return (0);
  212                 }
  213 
  214                 /*
  215                  * If the interface is not up, don't do anything.
  216                  */
  217                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  218                         break;
  219 
  220                 if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_FX)
  221                         lxtphy_set_fx(sc);
  222                 else
  223                         lxtphy_set_tp(sc);
  224 
  225                 mii_phy_setmedia(sc);
  226                 break;
  227 
  228         case MII_TICK:
  229                 /*
  230                  * If we're not currently selected, just return.
  231                  */
  232                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  233                         return (0);
  234                 if (mii_phy_tick(sc) == EJUSTRETURN)
  235                         return (0);
  236                 break;
  237         }
  238 
  239         /* Update the media status. */
  240         lxtphy_status(sc);
  241 
  242         /* Callback if something changed. */
  243         mii_phy_update(sc, cmd);
  244         return (0);
  245 }
  246 
  247 static void
  248 lxtphy_status(struct mii_softc *sc)
  249 {
  250         struct mii_data *mii = sc->mii_pdata;
  251         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  252         int bmcr, bmsr, csr;
  253 
  254         mii->mii_media_status = IFM_AVALID;
  255         mii->mii_media_active = IFM_ETHER;
  256 
  257         /*
  258          * Get link status from the CSR; we need to read the CSR
  259          * for media type anyhow, and the link status in the CSR
  260          * doens't latch, so fewer register reads are required.
  261          */
  262         csr = PHY_READ(sc, MII_LXTPHY_CSR);
  263         if (csr & CSR_LINK)
  264                 mii->mii_media_status |= IFM_ACTIVE;
  265 
  266         bmcr = PHY_READ(sc, MII_BMCR);
  267         if (bmcr & BMCR_ISO) {
  268                 mii->mii_media_active |= IFM_NONE;
  269                 mii->mii_media_status = 0;
  270                 return;
  271         }
  272 
  273         if (bmcr & BMCR_LOOP)
  274                 mii->mii_media_active |= IFM_LOOP;
  275 
  276         if (bmcr & BMCR_AUTOEN) {
  277                 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  278                 if ((bmsr & BMSR_ACOMP) == 0) {
  279                         /* Erg, still trying, I guess... */
  280                         mii->mii_media_active |= IFM_NONE;
  281                         return;
  282                 }
  283                 if (csr & CSR_SPEED)
  284                         mii->mii_media_active |= IFM_100_TX;
  285                 else
  286                         mii->mii_media_active |= IFM_10_T;
  287                 if (csr & CSR_DUPLEX)
  288                         mii->mii_media_active |= IFM_FDX;
  289         } else
  290                 mii->mii_media_active = ife->ifm_media;
  291 }
  292 
  293 static void
  294 lxtphy_set_tp(struct mii_softc *sc)
  295 {
  296         int cfg;
  297 
  298         cfg = PHY_READ(sc, MII_LXTPHY_CONFIG);
  299         cfg &= ~CONFIG_100BASEFX;
  300         PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg);
  301 }
  302 
  303 static void
  304 lxtphy_set_fx(struct mii_softc *sc)
  305 {
  306         int cfg;
  307 
  308         cfg = PHY_READ(sc, MII_LXTPHY_CONFIG);
  309         cfg |= CONFIG_100BASEFX;
  310         PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg);
  311 }

Cache object: c5504dbf3ba1e402adbc4c0992fdd373


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