smcphy.c

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

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

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