nsphy.c

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    1 /*      $NetBSD: nsphy.c,v 1.41 2003/11/02 11:10:36 wiz Exp $   */
    2 
    3 /*-
    4  * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
    9  * NASA Ames Research Center.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *      This product includes software developed by the NetBSD
   22  *      Foundation, Inc. and its contributors.
   23  * 4. Neither the name of The NetBSD Foundation nor the names of its
   24  *    contributors may be used to endorse or promote products derived
   25  *    from this software without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   37  * POSSIBILITY OF SUCH DAMAGE.
   38  */
   39 
   40 /*
   41  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
   42  *
   43  * Redistribution and use in source and binary forms, with or without
   44  * modification, are permitted provided that the following conditions
   45  * are met:
   46  * 1. Redistributions of source code must retain the above copyright
   47  *    notice, this list of conditions and the following disclaimer.
   48  * 2. Redistributions in binary form must reproduce the above copyright
   49  *    notice, this list of conditions and the following disclaimer in the
   50  *    documentation and/or other materials provided with the distribution.
   51  * 3. All advertising materials mentioning features or use of this software
   52  *    must display the following acknowledgement:
   53  *      This product includes software developed by Manuel Bouyer.
   54  * 4. The name of the author may not be used to endorse or promote products
   55  *    derived from this software without specific prior written permission.
   56  *
   57  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   58  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   59  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   60  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   61  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   62  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   63  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   64  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   65  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   66  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   67  */
   68 
   69 /*
   70  * driver for National Semiconductor's DP83840A ethernet 10/100 PHY
   71  * Data Sheet available from www.national.com
   72  */
   73 
   74 #include <sys/cdefs.h>
   75 __KERNEL_RCSID(0, "$NetBSD: nsphy.c,v 1.41 2003/11/02 11:10:36 wiz Exp $");
   76 
   77 #include <sys/param.h>
   78 #include <sys/systm.h>
   79 #include <sys/kernel.h>
   80 #include <sys/device.h>
   81 #include <sys/socket.h>
   82 #include <sys/errno.h>
   83 
   84 #include <net/if.h>
   85 #include <net/if_media.h>
   86 
   87 #include <dev/mii/mii.h>
   88 #include <dev/mii/miivar.h>
   89 #include <dev/mii/miidevs.h>
   90 
   91 #include <dev/mii/nsphyreg.h>
   92 
   93 int     nsphymatch(struct device *, struct cfdata *, void *);
   94 void    nsphyattach(struct device *, struct device *, void *);
   95 
   96 CFATTACH_DECL(nsphy, sizeof(struct mii_softc),
   97     nsphymatch, nsphyattach, mii_phy_detach, mii_phy_activate);
   98 
   99 int     nsphy_service(struct mii_softc *, struct mii_data *, int);
  100 void    nsphy_status(struct mii_softc *);
  101 void    nsphy_reset(struct mii_softc *sc);
  102 
  103 const struct mii_phy_funcs nsphy_funcs = {
  104         nsphy_service, nsphy_status, nsphy_reset,
  105 };
  106 
  107 const struct mii_phydesc nsphys[] = {
  108         { MII_OUI_xxNATSEMI,            MII_MODEL_xxNATSEMI_DP83840,
  109           MII_STR_xxNATSEMI_DP83840 },
  110 
  111         { 0,                            0,
  112           NULL },
  113 };
  114 
  115 int
  116 nsphymatch(struct device *parent, struct cfdata *match, void *aux)
  117 {
  118         struct mii_attach_args *ma = aux;
  119 
  120         if (mii_phy_match(ma, nsphys) != NULL)
  121                 return (10);
  122 
  123         return (0);
  124 }
  125 
  126 void
  127 nsphyattach(struct device *parent, struct device *self, void *aux)
  128 {
  129         struct mii_softc *sc = (struct mii_softc *)self;
  130         struct mii_attach_args *ma = aux;
  131         struct mii_data *mii = ma->mii_data;
  132         const struct mii_phydesc *mpd;
  133 
  134         mpd = mii_phy_match(ma, nsphys);
  135         aprint_naive(": Media interface\n");
  136         aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
  137 
  138         sc->mii_inst = mii->mii_instance;
  139         sc->mii_phy = ma->mii_phyno;
  140         sc->mii_funcs = &nsphy_funcs;
  141         sc->mii_pdata = mii;
  142         sc->mii_flags = ma->mii_flags;
  143         sc->mii_anegticks = 5;
  144 
  145         PHY_RESET(sc);
  146 
  147         sc->mii_capabilities =
  148             PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  149         aprint_normal("%s: ", sc->mii_dev.dv_xname);
  150         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
  151                 aprint_error("no media present");
  152         else
  153                 mii_phy_add_media(sc);
  154         aprint_normal("\n");
  155 }
  156 
  157 int
  158 nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  159 {
  160         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  161         int reg;
  162 
  163         if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
  164                 return (ENXIO);
  165 
  166         switch (cmd) {
  167         case MII_POLLSTAT:
  168                 /*
  169                  * If we're not polling our PHY instance, just return.
  170                  */
  171                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  172                         return (0);
  173                 break;
  174 
  175         case MII_MEDIACHG:
  176                 /*
  177                  * If the media indicates a different PHY instance,
  178                  * isolate ourselves.
  179                  */
  180                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  181                         reg = PHY_READ(sc, MII_BMCR);
  182                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  183                         return (0);
  184                 }
  185 
  186                 /*
  187                  * If the interface is not up, don't do anything.
  188                  */
  189                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  190                         break;
  191 
  192                 reg = PHY_READ(sc, MII_NSPHY_PCR);
  193 
  194                 /*
  195                  * Set up the PCR to use LED4 to indicate full-duplex
  196                  * in both 10baseT and 100baseTX modes.
  197                  */
  198                 reg |= PCR_LED4MODE;
  199 
  200                 /*
  201                  * Make sure Carrier Integrity Monitor function is
  202                  * disabled (normal for Node operation, but sometimes
  203                  * it's not set?!)
  204                  */
  205                 reg |= PCR_CIMDIS;
  206 
  207                 /*
  208                  * Make sure "force link good" is set to normal mode.
  209                  * It's only intended for debugging.
  210                  */
  211                 reg |= PCR_FLINK100;
  212 
  213                 /*
  214                  * Mystery bits which are supposedly `reserved',
  215                  * but we seem to need to set them when the PHY
  216                  * is connected to some interfaces:
  217                  *
  218                  * 0x0400 is needed for fxp
  219                  *        (Intel EtherExpress Pro 10+/100B, 82557 chip)
  220                  *        (nsphy with a DP83840 chip)
  221                  * 0x0100 may be needed for some other card
  222                  */
  223                 reg |= 0x0100 | 0x0400;
  224 
  225                 PHY_WRITE(sc, MII_NSPHY_PCR, reg);
  226 
  227                 mii_phy_setmedia(sc);
  228                 break;
  229 
  230         case MII_TICK:
  231                 /*
  232                  * If we're not currently selected, just return.
  233                  */
  234                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  235                         return (0);
  236 
  237                 if (mii_phy_tick(sc) == EJUSTRETURN)
  238                         return (0);
  239                 break;
  240 
  241         case MII_DOWN:
  242                 mii_phy_down(sc);
  243                 return (0);
  244         }
  245 
  246         /* Update the media status. */
  247         mii_phy_status(sc);
  248 
  249         /* Callback if something changed. */
  250         mii_phy_update(sc, cmd);
  251         return (0);
  252 }
  253 
  254 void
  255 nsphy_status(struct mii_softc *sc)
  256 {
  257         struct mii_data *mii = sc->mii_pdata;
  258         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  259         int bmsr, bmcr, par, anlpar;
  260 
  261         mii->mii_media_status = IFM_AVALID;
  262         mii->mii_media_active = IFM_ETHER;
  263 
  264         bmsr = PHY_READ(sc, MII_BMSR) |
  265             PHY_READ(sc, MII_BMSR);
  266         if (bmsr & BMSR_LINK)
  267                 mii->mii_media_status |= IFM_ACTIVE;
  268 
  269         bmcr = PHY_READ(sc, MII_BMCR);
  270         if (bmcr & BMCR_ISO) {
  271                 mii->mii_media_active |= IFM_NONE;
  272                 mii->mii_media_status = 0;
  273                 return;
  274         }
  275 
  276         if (bmcr & BMCR_LOOP)
  277                 mii->mii_media_active |= IFM_LOOP;
  278 
  279         if (bmcr & BMCR_AUTOEN) {
  280                 /*
  281                  * The PAR status bits are only valid of autonegotiation
  282                  * has completed (or it's disabled).
  283                  */
  284                 if ((bmsr & BMSR_ACOMP) == 0) {
  285                         /* Erg, still trying, I guess... */
  286                         mii->mii_media_active |= IFM_NONE;
  287                         return;
  288                 }
  289 
  290                 /*
  291                  * Argh.  The PAR doesn't seem to indicate duplex mode
  292                  * properly!  Determine media based on link partner's
  293                  * advertised capabilities.
  294                  */
  295                 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
  296                         anlpar = PHY_READ(sc, MII_ANAR) &
  297                             PHY_READ(sc, MII_ANLPAR);
  298                         if (anlpar & ANLPAR_T4)
  299                                 mii->mii_media_active |= IFM_100_T4;
  300                         else if (anlpar & ANLPAR_TX_FD)
  301                                 mii->mii_media_active |= IFM_100_TX|IFM_FDX;
  302                         else if (anlpar & ANLPAR_TX)
  303                                 mii->mii_media_active |= IFM_100_TX;
  304                         else if (anlpar & ANLPAR_10_FD)
  305                                 mii->mii_media_active |= IFM_10_T|IFM_FDX;
  306                         else if (anlpar & ANLPAR_10)
  307                                 mii->mii_media_active |= IFM_10_T;
  308                         else
  309                                 mii->mii_media_active |= IFM_NONE;
  310                         return;
  311                 }
  312 
  313                 /*
  314                  * Link partner is not capable of autonegotiation.
  315                  * We will never be in full-duplex mode if this is
  316                  * the case, so reading the PAR is OK.
  317                  */
  318                 par = PHY_READ(sc, MII_NSPHY_PAR);
  319                 if (par & PAR_10)
  320                         mii->mii_media_active |= IFM_10_T;
  321                 else
  322                         mii->mii_media_active |= IFM_100_TX;
  323 #if 0
  324                 if (par & PAR_FDX)
  325                         mii->mii_media_active |= IFM_FDX;
  326 #endif
  327         } else
  328                 mii->mii_media_active = ife->ifm_media;
  329 }
  330 
  331 void
  332 nsphy_reset(struct mii_softc *sc)
  333 {
  334         int reg, i;
  335 
  336         if (sc->mii_flags & MIIF_NOISOLATE)
  337                 reg = BMCR_RESET;
  338         else
  339                 reg = BMCR_RESET | BMCR_ISO;
  340         PHY_WRITE(sc, MII_BMCR, reg);
  341 
  342         /*
  343          * Give it a little time to settle in case we just got power.
  344          * The DP83840A data sheet suggests that a soft reset not happen
  345          * within 500us of power being applied.  Be conservative.
  346          */
  347         delay(1000);
  348 
  349         /*
  350          * Wait another 2s for it to complete.
  351          * This is only a little overkill as under normal circumstances
  352          * the PHY can take up to 1s to complete reset.
  353          * This is also a bit odd because after a reset, the BMCR will
  354          * clear the reset bit and simply reports 0 even though the reset
  355          * is not yet complete.
  356          */
  357         for (i = 0; i < 1000; i++) {
  358                 reg = PHY_READ(sc, MII_BMCR); 
  359                 if (reg && ((reg & BMCR_RESET) == 0))
  360                         break;
  361                 delay(2000);
  362         }
  363 
  364         if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) {
  365                 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  366         }
  367 }
  368
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/nsphy.c

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