rdcphy.c

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    1 /*-
    2  * Copyright (c) 2010, Pyun YongHyeon <yongari@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice unmodified, this list of conditions, and the following
   10  *    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 AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD$");
   30 
   31 /*
   32  * Driver for the RDC Semiconductor R6040 10/100 PHY.
   33  */
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/kernel.h>
   38 #include <sys/module.h>
   39 #include <sys/socket.h>
   40 #include <sys/bus.h>
   41 
   42 #include <net/if.h>
   43 #include <net/if_media.h>
   44 
   45 #include <dev/mii/mii.h>
   46 #include <dev/mii/miivar.h>
   47 #include "miidevs.h"
   48 
   49 #include <dev/mii/rdcphyreg.h>
   50 
   51 #include "miibus_if.h"
   52 
   53 static device_probe_t   rdcphy_probe;
   54 static device_attach_t  rdcphy_attach;
   55 
   56 struct rdcphy_softc {
   57         struct mii_softc mii_sc;
   58         int mii_model;
   59         int mii_link_tick;
   60 #define RDCPHY_MANNEG_TICK      3
   61 };
   62 
   63 static device_method_t rdcphy_methods[] = {
   64         /* device interface */
   65         DEVMETHOD(device_probe,         rdcphy_probe),
   66         DEVMETHOD(device_attach,        rdcphy_attach),
   67         DEVMETHOD(device_detach,        mii_phy_detach),
   68         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   69         DEVMETHOD_END
   70 };
   71 
   72 static devclass_t rdcphy_devclass;
   73 
   74 static driver_t rdcphy_driver = {
   75         "rdcphy",
   76         rdcphy_methods,
   77         sizeof(struct rdcphy_softc)
   78 };
   79 
   80 DRIVER_MODULE(rdcphy, miibus, rdcphy_driver, rdcphy_devclass, 0, 0);
   81 
   82 static int      rdcphy_service(struct mii_softc *, struct mii_data *, int);
   83 static void     rdcphy_status(struct mii_softc *);
   84 
   85 static const struct mii_phydesc rdcphys[] = {
   86         MII_PHY_DESC(RDC, R6040),
   87         MII_PHY_END
   88 };
   89 
   90 static int
   91 rdcphy_probe(device_t dev)
   92 {
   93 
   94         return (mii_phy_dev_probe(dev, rdcphys, BUS_PROBE_DEFAULT));
   95 }
   96 
   97 static int
   98 rdcphy_attach(device_t dev)
   99 {
  100         struct rdcphy_softc *rsc;
  101         struct mii_softc *sc;
  102         struct mii_attach_args *ma;
  103         struct mii_data *mii;
  104 
  105         rsc = device_get_softc(dev);
  106         sc = &rsc->mii_sc;
  107         ma = device_get_ivars(dev);
  108         sc->mii_dev = device_get_parent(dev);
  109         mii = ma->mii_data;
  110         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  111 
  112         sc->mii_flags = miibus_get_flags(dev);
  113         sc->mii_inst = mii->mii_instance++;
  114         sc->mii_phy = ma->mii_phyno;
  115         sc->mii_service = rdcphy_service;
  116         sc->mii_pdata = mii;
  117 
  118         sc->mii_flags |= MIIF_NOMANPAUSE;
  119 
  120         rsc->mii_model = MII_MODEL(ma->mii_id2);
  121         if (bootverbose)
  122                 device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n",
  123                     MII_OUI(ma->mii_id1, ma->mii_id2), MII_MODEL(ma->mii_id2),
  124                     MII_REV(ma->mii_id2));
  125 
  126         mii_phy_reset(sc);
  127 
  128         sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
  129         if (sc->mii_capabilities & BMSR_EXTSTAT)
  130                 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
  131         device_printf(dev, " ");
  132         mii_phy_add_media(sc);
  133         printf("\n");
  134 
  135         MIIBUS_MEDIAINIT(sc->mii_dev);
  136         return (0);
  137 }
  138 
  139 static int
  140 rdcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  141 {
  142         struct rdcphy_softc *rsc;
  143         struct ifmedia_entry *ife;
  144 
  145         rsc = (struct rdcphy_softc *)sc;
  146         ife = mii->mii_media.ifm_cur;
  147 
  148         switch (cmd) {
  149         case MII_POLLSTAT:
  150                 break;
  151 
  152         case MII_MEDIACHG:
  153                 /*
  154                  * If the interface is not up, don't do anything.
  155                  */
  156                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  157                         break;
  158 
  159                 mii_phy_setmedia(sc);
  160                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  161                 case IFM_100_TX:
  162                 case IFM_10_T:
  163                         /*
  164                          * Report fake lost link event to parent
  165                          * driver.  This will stop MAC of parent
  166                          * driver and make it possible to reconfigure
  167                          * MAC after completion of link establishment.
  168                          * Note, the parent MAC seems to require
  169                          * restarting MAC when underlying any PHY
  170                          * configuration was changed even if the
  171                          * resolved speed/duplex was not changed at
  172                          * all.
  173                          */
  174                         mii->mii_media_status = 0;
  175                         mii->mii_media_active = IFM_ETHER | IFM_NONE;
  176                         rsc->mii_link_tick = RDCPHY_MANNEG_TICK;
  177                         /* Immediately report link down. */
  178                         mii_phy_update(sc, MII_MEDIACHG);
  179                         return (0);
  180                 default:
  181                         break;
  182                 }
  183                 break;
  184 
  185         case MII_TICK:
  186                 if (mii_phy_tick(sc) == EJUSTRETURN)
  187                         return (0);
  188                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
  189                         /*
  190                          * It seems the PHY hardware does not correctly
  191                          * report link status changes when manual link
  192                          * configuration is in progress.  It is also
  193                          * possible for the PHY to complete establishing
  194                          * a link within one second such that mii(4)
  195                          * did not notice the link change.  To workaround
  196                          * the issue, emulate lost link event and wait
  197                          * for 3 seconds when manual link configuration
  198                          * is in progress.  3 seconds would be long
  199                          * enough to absorb transient link flips.
  200                          */
  201                         if (rsc->mii_link_tick > 0) {
  202                                 rsc->mii_link_tick--;
  203                                 return (0);
  204                         }
  205                 }
  206                 break;
  207         }
  208 
  209         /* Update the media status. */
  210         rdcphy_status(sc);
  211 
  212         /* Callback if something changed. */
  213         mii_phy_update(sc, cmd);
  214         return (0);
  215 }
  216 
  217 static void
  218 rdcphy_status(struct mii_softc *sc)
  219 {
  220         struct mii_data *mii;
  221         struct ifmedia_entry *ife;
  222         int bmsr, bmcr, physts;
  223 
  224         mii = sc->mii_pdata;
  225         ife = mii->mii_media.ifm_cur;
  226 
  227         mii->mii_media_status = IFM_AVALID;
  228         mii->mii_media_active = IFM_ETHER;
  229 
  230         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  231         physts = PHY_READ(sc, MII_RDCPHY_STATUS);
  232 
  233         if ((physts & STATUS_LINK_UP) != 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         switch (physts & STATUS_SPEED_MASK) {
  255         case STATUS_SPEED_100:
  256                 mii->mii_media_active |= IFM_100_TX;
  257                 break;
  258         case STATUS_SPEED_10:
  259                 mii->mii_media_active |= IFM_10_T;
  260                 break;
  261         default:
  262                 mii->mii_media_active |= IFM_NONE;
  263                 return;
  264         }
  265         if ((physts & STATUS_FULL_DUPLEX) != 0)
  266                 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
  267         else
  268                 mii->mii_media_active |= IFM_HDX;
  269 }

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

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