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 devclass_t smcphy_devclass;
   73 
   74 static driver_t smcphy_driver = {
   75         "smcphy",
   76         smcphy_methods,
   77         sizeof(struct mii_softc)
   78 };
   79 
   80 DRIVER_MODULE(smcphy, miibus, smcphy_driver, smcphy_devclass, 0, 0);
   81 
   82 static const struct mii_phydesc smcphys[] = {
   83         MII_PHY_DESC(SEEQ, 80220),
   84         MII_PHY_DESC(SEEQ, 84220),
   85         MII_PHY_END
   86 };
   87 
   88 static const struct mii_phy_funcs smcphy80220_funcs = {
   89         smcphy_service,
   90         smcphy_status,
   91         mii_phy_reset
   92 };
   93 
   94 static const struct mii_phy_funcs smcphy_funcs = {
   95         smcphy_service,
   96         smcphy_status,
   97         smcphy_reset
   98 };
   99 
  100 static int
  101 smcphy_probe(device_t dev)
  102 {
  103 
  104         return (mii_phy_dev_probe(dev, smcphys, BUS_PROBE_DEFAULT));
  105 }
  106 
  107 static int
  108 smcphy_attach(device_t dev)
  109 {
  110         struct mii_softc *sc;
  111         struct mii_attach_args *ma;
  112         const struct mii_phy_funcs *mpf;
  113 
  114         sc = device_get_softc(dev);
  115         ma = device_get_ivars(dev);
  116         if (MII_MODEL(ma->mii_id2) == MII_MODEL_SEEQ_80220)
  117                 mpf = &smcphy80220_funcs;
  118         else
  119                 mpf = &smcphy_funcs;
  120         mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1);
  121         mii_phy_setmedia(sc);
  122 
  123         return (0);
  124 }
  125 
  126 static int
  127 smcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  128 {
  129         struct  ifmedia_entry *ife;
  130         int     reg;
  131 
  132         ife = mii->mii_media.ifm_cur;
  133 
  134         switch (cmd) {
  135         case MII_POLLSTAT:
  136                 break;
  137 
  138         case MII_MEDIACHG:
  139                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  140                 case IFM_AUTO:
  141                         smcphy_auto(sc, ife->ifm_media);
  142                         break;
  143 
  144                 default:
  145                         mii_phy_setmedia(sc);
  146                         break;
  147                 }
  148 
  149                 break;
  150 
  151         case MII_TICK:
  152                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
  153                         break;
  154                 }
  155 
  156                 /* I have no idea why BMCR_ISO gets set. */
  157                 reg = PHY_READ(sc, MII_BMCR);
  158                 if (reg & BMCR_ISO) {
  159                         PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO);
  160                 }
  161 
  162                 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  163                 if (reg & BMSR_LINK) {
  164                         sc->mii_ticks = 0;
  165                         break;
  166                 }
  167 
  168                 if (++sc->mii_ticks <= MII_ANEGTICKS) {
  169                         break;
  170                 }
  171 
  172                 sc->mii_ticks = 0;
  173                 PHY_RESET(sc);
  174                 smcphy_auto(sc, ife->ifm_media);
  175                 break;
  176         }
  177 
  178         /* Update the media status. */
  179         PHY_STATUS(sc);
  180 
  181         /* Callback if something changed. */
  182         mii_phy_update(sc, cmd);
  183         return (0);
  184 }
  185 
  186 static void
  187 smcphy_reset(struct mii_softc *sc)
  188 {
  189         u_int   bmcr;
  190         int     timeout;
  191 
  192         PHY_WRITE(sc, MII_BMCR, BMCR_RESET);
  193 
  194         for (timeout = 2; timeout > 0; timeout--) {
  195                 DELAY(50000);
  196                 bmcr = PHY_READ(sc, MII_BMCR);
  197                 if ((bmcr & BMCR_RESET) == 0)
  198                         break;
  199         }
  200 
  201         if (bmcr & BMCR_RESET)
  202                 device_printf(sc->mii_dev, "reset failed\n");
  203 
  204         PHY_WRITE(sc, MII_BMCR, 0x3000);
  205 
  206         /* Mask interrupts, we poll instead. */
  207         PHY_WRITE(sc, 0x1e, 0xffc0);
  208 }
  209 
  210 static void
  211 smcphy_auto(struct mii_softc *sc, int media)
  212 {
  213         uint16_t        anar;
  214 
  215         anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
  216         if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0)
  217                 anar |= ANAR_FC;
  218         PHY_WRITE(sc, MII_ANAR, anar);
  219         /* Apparently this helps. */
  220         anar = PHY_READ(sc, MII_ANAR);
  221         PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
  222 }
  223 
  224 static void
  225 smcphy_status(struct mii_softc *sc)
  226 {
  227         struct mii_data *mii;
  228         uint32_t bmcr, bmsr, status;
  229 
  230         mii = sc->mii_pdata;
  231         mii->mii_media_status = IFM_AVALID;
  232         mii->mii_media_active = IFM_ETHER;
  233 
  234         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  235         if ((bmsr & BMSR_LINK) != 0)
  236                 mii->mii_media_status |= IFM_ACTIVE;
  237 
  238         bmcr = PHY_READ(sc, MII_BMCR);
  239         if ((bmcr & BMCR_ISO) != 0) {
  240                 mii->mii_media_active |= IFM_NONE;
  241                 mii->mii_media_status = 0;
  242                 return;
  243         }
  244 
  245         if ((bmcr & BMCR_LOOP) != 0)
  246                 mii->mii_media_active |= IFM_LOOP;
  247 
  248         if ((bmcr & BMCR_AUTOEN) != 0) {
  249                 if ((bmsr & BMSR_ACOMP) == 0) {
  250                         /* Erg, still trying, I guess... */
  251                         mii->mii_media_active |= IFM_NONE;
  252                         return;
  253                 }
  254         }
  255 
  256         status = PHY_READ(sc, 0x12);
  257         if (status & 0x0080)
  258                 mii->mii_media_active |= IFM_100_TX;
  259         else
  260                 mii->mii_media_active |= IFM_10_T;
  261         if (status & 0x0040)
  262                 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
  263         else
  264                 mii->mii_media_active |= IFM_HDX;
  265 }

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

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