rdcphy.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2010, Pyun YongHyeon <yongari@FreeBSD.org>
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice unmodified, this list of conditions, and the following
   12  *    disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD$");
   32 
   33 /*
   34  * Driver for the RDC Semiconductor R6040 10/100 PHY.
   35  */
   36 
   37 #include <sys/param.h>
   38 #include <sys/systm.h>
   39 #include <sys/kernel.h>
   40 #include <sys/module.h>
   41 #include <sys/socket.h>
   42 #include <sys/bus.h>
   43 
   44 #include <net/if.h>
   45 #include <net/if_media.h>
   46 
   47 #include <dev/mii/mii.h>
   48 #include <dev/mii/miivar.h>
   49 #include "miidevs.h"
   50 
   51 #include <dev/mii/rdcphyreg.h>
   52 
   53 #include "miibus_if.h"
   54 
   55 static device_probe_t   rdcphy_probe;
   56 static device_attach_t  rdcphy_attach;
   57 
   58 struct rdcphy_softc {
   59         struct mii_softc mii_sc;
   60         int mii_link_tick;
   61 #define RDCPHY_MANNEG_TICK      3
   62 };
   63 
   64 static device_method_t rdcphy_methods[] = {
   65         /* device interface */
   66         DEVMETHOD(device_probe,         rdcphy_probe),
   67         DEVMETHOD(device_attach,        rdcphy_attach),
   68         DEVMETHOD(device_detach,        mii_phy_detach),
   69         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   70         DEVMETHOD_END
   71 };
   72 
   73 static driver_t rdcphy_driver = {
   74         "rdcphy",
   75         rdcphy_methods,
   76         sizeof(struct rdcphy_softc)
   77 };
   78 
   79 DRIVER_MODULE(rdcphy, miibus, rdcphy_driver, 0, 0);
   80 
   81 static int      rdcphy_service(struct mii_softc *, struct mii_data *, int);
   82 static void     rdcphy_status(struct mii_softc *);
   83 
   84 static const struct mii_phydesc rdcphys[] = {
   85         MII_PHY_DESC(RDC, R6040),
   86         MII_PHY_DESC(RDC, R6040_2),
   87         MII_PHY_END
   88 };
   89 
   90 static const struct mii_phy_funcs rdcphy_funcs = {
   91         rdcphy_service,
   92         rdcphy_status,
   93         mii_phy_reset
   94 };
   95 
   96 static int
   97 rdcphy_probe(device_t dev)
   98 {
   99 
  100         return (mii_phy_dev_probe(dev, rdcphys, BUS_PROBE_DEFAULT));
  101 }
  102 
  103 static int
  104 rdcphy_attach(device_t dev)
  105 {
  106 
  107         mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &rdcphy_funcs, 1);
  108         return (0);
  109 }
  110 
  111 static int
  112 rdcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  113 {
  114         struct rdcphy_softc *rsc;
  115         struct ifmedia_entry *ife;
  116 
  117         rsc = (struct rdcphy_softc *)sc;
  118         ife = mii->mii_media.ifm_cur;
  119 
  120         switch (cmd) {
  121         case MII_POLLSTAT:
  122                 break;
  123 
  124         case MII_MEDIACHG:
  125                 mii_phy_setmedia(sc);
  126                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  127                 case IFM_100_TX:
  128                 case IFM_10_T:
  129                         /*
  130                          * Report fake lost link event to parent
  131                          * driver.  This will stop MAC of parent
  132                          * driver and make it possible to reconfigure
  133                          * MAC after completion of link establishment.
  134                          * Note, the parent MAC seems to require
  135                          * restarting MAC when underlying any PHY
  136                          * configuration was changed even if the
  137                          * resolved speed/duplex was not changed at
  138                          * all.
  139                          */
  140                         mii->mii_media_status = 0;
  141                         mii->mii_media_active = IFM_ETHER | IFM_NONE;
  142                         rsc->mii_link_tick = RDCPHY_MANNEG_TICK;
  143                         /* Immediately report link down. */
  144                         mii_phy_update(sc, MII_MEDIACHG);
  145                         return (0);
  146                 default:
  147                         break;
  148                 }
  149                 break;
  150 
  151         case MII_TICK:
  152                 if (mii_phy_tick(sc) == EJUSTRETURN)
  153                         return (0);
  154                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
  155                         /*
  156                          * It seems the PHY hardware does not correctly
  157                          * report link status changes when manual link
  158                          * configuration is in progress.  It is also
  159                          * possible for the PHY to complete establishing
  160                          * a link within one second such that mii(4)
  161                          * did not notice the link change.  To workaround
  162                          * the issue, emulate lost link event and wait
  163                          * for 3 seconds when manual link configuration
  164                          * is in progress.  3 seconds would be long
  165                          * enough to absorb transient link flips.
  166                          */
  167                         if (rsc->mii_link_tick > 0) {
  168                                 rsc->mii_link_tick--;
  169                                 return (0);
  170                         }
  171                 }
  172                 break;
  173         }
  174 
  175         /* Update the media status. */
  176         PHY_STATUS(sc);
  177 
  178         /* Callback if something changed. */
  179         mii_phy_update(sc, cmd);
  180         return (0);
  181 }
  182 
  183 static void
  184 rdcphy_status(struct mii_softc *sc)
  185 {
  186         struct mii_data *mii;
  187         int bmsr, bmcr, physts;
  188 
  189         mii = sc->mii_pdata;
  190 
  191         mii->mii_media_status = IFM_AVALID;
  192         mii->mii_media_active = IFM_ETHER;
  193 
  194         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  195         physts = PHY_READ(sc, MII_RDCPHY_STATUS);
  196 
  197         if ((physts & STATUS_LINK_UP) != 0)
  198                 mii->mii_media_status |= IFM_ACTIVE;
  199 
  200         bmcr = PHY_READ(sc, MII_BMCR);
  201         if ((bmcr & BMCR_ISO) != 0) {
  202                 mii->mii_media_active |= IFM_NONE;
  203                 mii->mii_media_status = 0;
  204                 return;
  205         }
  206 
  207         if ((bmcr & BMCR_LOOP) != 0)
  208                 mii->mii_media_active |= IFM_LOOP;
  209 
  210         if ((bmcr & BMCR_AUTOEN) != 0) {
  211                 if ((bmsr & BMSR_ACOMP) == 0) {
  212                         /* Erg, still trying, I guess... */
  213                         mii->mii_media_active |= IFM_NONE;
  214                         return;
  215                 }
  216         }
  217 
  218         switch (physts & STATUS_SPEED_MASK) {
  219         case STATUS_SPEED_100:
  220                 mii->mii_media_active |= IFM_100_TX;
  221                 break;
  222         case STATUS_SPEED_10:
  223                 mii->mii_media_active |= IFM_10_T;
  224                 break;
  225         default:
  226                 mii->mii_media_active |= IFM_NONE;
  227                 return;
  228         }
  229         if ((physts & STATUS_FULL_DUPLEX) != 0)
  230                 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
  231         else
  232                 mii->mii_media_active |= IFM_HDX;
  233 }

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

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sys/dev/mii/rdcphy.c