smcphy.c

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    1 /*-
    2  * Copyright (c) 2006 Benno Rice.  All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  *
   13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   23  */
   24 
   25 #include <sys/cdefs.h>
   26 __FBSDID("$FreeBSD$");
   27 
   28 /*
   29  * Driver for the internal PHY on the SMSC LAN91C111.
   30  */
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/kernel.h>
   35 #include <sys/socket.h>
   36 #include <sys/errno.h>
   37 #include <sys/module.h>
   38 #include <sys/bus.h>
   39 #include <sys/malloc.h>
   40 
   41 #include <machine/bus.h>
   42 
   43 #include <net/if.h>
   44 #include <net/if_media.h>
   45 
   46 #include <dev/mii/mii.h>
   47 #include <dev/mii/miivar.h>
   48 #include "miidevs.h"
   49 
   50 #include "miibus_if.h"
   51 
   52 static int      smcphy_probe(device_t);
   53 static int      smcphy_attach(device_t);
   54 
   55 static int      smcphy_service(struct mii_softc *, struct mii_data *, int);
   56 static void     smcphy_reset(struct mii_softc *);
   57 static void     smcphy_auto(struct mii_softc *, int);
   58 static void     smcphy_status(struct mii_softc *);
   59 
   60 static device_method_t smcphy_methods[] = {
   61         /* device interface */
   62         DEVMETHOD(device_probe,         smcphy_probe),
   63         DEVMETHOD(device_attach,        smcphy_attach),
   64         DEVMETHOD(device_detach,        mii_phy_detach),
   65         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   66         DEVMETHOD_END
   67 };
   68 
   69 static devclass_t smcphy_devclass;
   70 
   71 static driver_t smcphy_driver = {
   72         "smcphy",
   73         smcphy_methods,
   74         sizeof(struct mii_softc)
   75 };
   76 
   77 DRIVER_MODULE(smcphy, miibus, smcphy_driver, smcphy_devclass, 0, 0);
   78 
   79 static const struct mii_phydesc smcphys[] = {
   80         MII_PHY_DESC(SEEQ, 80220),
   81         MII_PHY_DESC(SEEQ, 84220),
   82         MII_PHY_END
   83 };
   84 
   85 static const struct mii_phy_funcs smcphy80220_funcs = {
   86         smcphy_service,
   87         smcphy_status,
   88         mii_phy_reset
   89 };
   90 
   91 static const struct mii_phy_funcs smcphy_funcs = {
   92         smcphy_service,
   93         smcphy_status,
   94         smcphy_reset
   95 };
   96 
   97 static int
   98 smcphy_probe(device_t dev)
   99 {
  100 
  101         return (mii_phy_dev_probe(dev, smcphys, BUS_PROBE_DEFAULT));
  102 }
  103 
  104 static int
  105 smcphy_attach(device_t dev)
  106 {
  107         struct mii_softc *sc;
  108         struct mii_attach_args *ma;
  109         const struct mii_phy_funcs *mpf;
  110 
  111         sc = device_get_softc(dev);
  112         ma = device_get_ivars(dev);
  113         if (MII_MODEL(ma->mii_id2) == MII_MODEL_SEEQ_80220)
  114                 mpf = &smcphy80220_funcs;
  115         else
  116                 mpf = &smcphy_funcs;
  117         mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1);
  118         mii_phy_setmedia(sc);
  119 
  120         return (0);
  121 }
  122 
  123 static int
  124 smcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  125 {
  126         struct  ifmedia_entry *ife;
  127         int     reg;
  128 
  129         ife = mii->mii_media.ifm_cur;
  130 
  131         switch (cmd) {
  132         case MII_POLLSTAT:
  133                 break;
  134 
  135         case MII_MEDIACHG:
  136                 /*
  137                  * If the interface is not up, don't do anything.
  138                  */
  139                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  140                         break;
  141 
  142                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  143                 case IFM_AUTO:
  144                         smcphy_auto(sc, ife->ifm_media);
  145                         break;
  146 
  147                 default:
  148                         mii_phy_setmedia(sc);
  149                         break;
  150                 }
  151 
  152                 break;
  153 
  154         case MII_TICK:
  155                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) {
  156                         return (0);
  157                 }
  158 
  159                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
  160                         break;
  161                 }
  162 
  163                 /* I have no idea why BMCR_ISO gets set. */
  164                 reg = PHY_READ(sc, MII_BMCR);
  165                 if (reg & BMCR_ISO) {
  166                         PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO);
  167                 }
  168 
  169                 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  170                 if (reg & BMSR_LINK) {
  171                         sc->mii_ticks = 0;
  172                         break;
  173                 }
  174 
  175                 if (++sc->mii_ticks <= MII_ANEGTICKS) {
  176                         break;
  177                 }
  178 
  179                 sc->mii_ticks = 0;
  180                 PHY_RESET(sc);
  181                 smcphy_auto(sc, ife->ifm_media);
  182                 break;
  183         }
  184 
  185         /* Update the media status. */
  186         PHY_STATUS(sc);
  187 
  188         /* Callback if something changed. */
  189         mii_phy_update(sc, cmd);
  190         return (0);
  191 }
  192 
  193 static void
  194 smcphy_reset(struct mii_softc *sc)
  195 {
  196         u_int   bmcr;
  197         int     timeout;
  198 
  199         PHY_WRITE(sc, MII_BMCR, BMCR_RESET);
  200 
  201         for (timeout = 2; timeout > 0; timeout--) {
  202                 DELAY(50000);
  203                 bmcr = PHY_READ(sc, MII_BMCR);
  204                 if ((bmcr & BMCR_RESET) == 0)
  205                         break;
  206         }
  207 
  208         if (bmcr & BMCR_RESET)
  209                 device_printf(sc->mii_dev, "reset failed\n");
  210 
  211         PHY_WRITE(sc, MII_BMCR, 0x3000);
  212 
  213         /* Mask interrupts, we poll instead. */
  214         PHY_WRITE(sc, 0x1e, 0xffc0);
  215 }
  216 
  217 static void
  218 smcphy_auto(struct mii_softc *sc, int media)
  219 {
  220         uint16_t        anar;
  221 
  222         anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
  223         if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0)
  224                 anar |= ANAR_FC;
  225         PHY_WRITE(sc, MII_ANAR, anar);
  226         /* Apparently this helps. */
  227         anar = PHY_READ(sc, MII_ANAR);
  228         PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
  229 }
  230 
  231 static void
  232 smcphy_status(struct mii_softc *sc)
  233 {
  234         struct mii_data *mii;
  235         uint32_t bmcr, bmsr, status;
  236 
  237         mii = sc->mii_pdata;
  238         mii->mii_media_status = IFM_AVALID;
  239         mii->mii_media_active = IFM_ETHER;
  240 
  241         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  242         if ((bmsr & BMSR_LINK) != 0)
  243                 mii->mii_media_status |= IFM_ACTIVE;
  244 
  245         bmcr = PHY_READ(sc, MII_BMCR);
  246         if ((bmcr & BMCR_ISO) != 0) {
  247                 mii->mii_media_active |= IFM_NONE;
  248                 mii->mii_media_status = 0;
  249                 return;
  250         }
  251 
  252         if ((bmcr & BMCR_LOOP) != 0)
  253                 mii->mii_media_active |= IFM_LOOP;
  254 
  255         if ((bmcr & BMCR_AUTOEN) != 0) {
  256                 if ((bmsr & BMSR_ACOMP) == 0) {
  257                         /* Erg, still trying, I guess... */
  258                         mii->mii_media_active |= IFM_NONE;
  259                         return;
  260                 }
  261         }
  262 
  263         status = PHY_READ(sc, 0x12);
  264         if (status & 0x0080)
  265                 mii->mii_media_active |= IFM_100_TX;
  266         else
  267                 mii->mii_media_active |= IFM_10_T;
  268         if (status & 0x0040)
  269                 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
  270         else
  271                 mii->mii_media_active |= IFM_HDX;
  272 }

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

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