jmphy.c

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    1 /*-
    2  * Copyright (c) 2008, 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 JMicron JMP211 10/100/1000, JMP202 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/jmphyreg.h>
   50 
   51 #include "miibus_if.h"
   52 
   53 static int      jmphy_probe(device_t);
   54 static int      jmphy_attach(device_t);
   55 static void     jmphy_reset(struct mii_softc *);
   56 static uint16_t jmphy_anar(struct ifmedia_entry *);
   57 static int      jmphy_setmedia(struct mii_softc *, struct ifmedia_entry *);
   58 
   59 static device_method_t jmphy_methods[] = {
   60         /* Device interface. */
   61         DEVMETHOD(device_probe,         jmphy_probe),
   62         DEVMETHOD(device_attach,        jmphy_attach),
   63         DEVMETHOD(device_detach,        mii_phy_detach),
   64         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   65         DEVMETHOD_END
   66 };
   67 
   68 static devclass_t jmphy_devclass;
   69 static driver_t jmphy_driver = {
   70         "jmphy",
   71         jmphy_methods,
   72         sizeof(struct mii_softc)
   73 };
   74 
   75 DRIVER_MODULE(jmphy, miibus, jmphy_driver, jmphy_devclass, 0, 0);
   76 
   77 static int      jmphy_service(struct mii_softc *, struct mii_data *, int);
   78 static void     jmphy_status(struct mii_softc *);
   79 
   80 static const struct mii_phydesc jmphys[] = {
   81         MII_PHY_DESC(JMICRON, JMP202),
   82         MII_PHY_DESC(JMICRON, JMP211),
   83         MII_PHY_END
   84 };
   85 
   86 static const struct mii_phy_funcs jmphy_funcs = {
   87         jmphy_service,
   88         jmphy_status,
   89         jmphy_reset
   90 };
   91 
   92 static int
   93 jmphy_probe(device_t dev)
   94 {
   95 
   96         return (mii_phy_dev_probe(dev, jmphys, BUS_PROBE_DEFAULT));
   97 }
   98 
   99 static int
  100 jmphy_attach(device_t dev)
  101 {
  102         struct mii_attach_args *ma;
  103         u_int flags;
  104 
  105         ma = device_get_ivars(dev);
  106         flags = 0;
  107         if (strcmp(ma->mii_data->mii_ifp->if_dname, "jme") == 0 &&
  108             (miibus_get_flags(dev) & MIIF_MACPRIV0) != 0)
  109                 flags |= MIIF_PHYPRIV0;
  110         mii_phy_dev_attach(dev, flags, &jmphy_funcs, 1);
  111         return (0);
  112 }
  113 
  114 static int
  115 jmphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  116 {
  117         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  118 
  119         switch (cmd) {
  120         case MII_POLLSTAT:
  121                 break;
  122 
  123         case MII_MEDIACHG:
  124                 /*
  125                  * If the interface is not up, don't do anything.
  126                  */
  127                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  128                         break;
  129 
  130                 if (jmphy_setmedia(sc, ife) != EJUSTRETURN)
  131                         return (EINVAL);
  132                 break;
  133 
  134         case MII_TICK:
  135                 /*
  136                  * Is the interface even up?
  137                  */
  138                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  139                         return (0);
  140 
  141                 /*
  142                  * Only used for autonegotiation.
  143                  */
  144                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
  145                         sc->mii_ticks = 0;
  146                         break;
  147                 }
  148 
  149                 /* Check for link. */
  150                 if ((PHY_READ(sc, JMPHY_SSR) & JMPHY_SSR_LINK_UP) != 0) {
  151                         sc->mii_ticks = 0;
  152                         break;
  153                 }
  154 
  155                 /* Announce link loss right after it happens. */
  156                 if (sc->mii_ticks++ == 0)
  157                         break;
  158                 if (sc->mii_ticks <= sc->mii_anegticks)
  159                         return (0);
  160 
  161                 sc->mii_ticks = 0;
  162                 (void)jmphy_setmedia(sc, ife);
  163                 break;
  164         }
  165 
  166         /* Update the media status. */
  167         PHY_STATUS(sc);
  168 
  169         /* Callback if something changed. */
  170         mii_phy_update(sc, cmd);
  171         return (0);
  172 }
  173 
  174 static void
  175 jmphy_status(struct mii_softc *sc)
  176 {
  177         struct mii_data *mii = sc->mii_pdata;
  178         int bmcr, ssr;
  179 
  180         mii->mii_media_status = IFM_AVALID;
  181         mii->mii_media_active = IFM_ETHER;
  182 
  183         ssr = PHY_READ(sc, JMPHY_SSR);
  184         if ((ssr & JMPHY_SSR_LINK_UP) != 0)
  185                 mii->mii_media_status |= IFM_ACTIVE;
  186 
  187         bmcr = PHY_READ(sc, MII_BMCR);
  188         if ((bmcr & BMCR_ISO) != 0) {
  189                 mii->mii_media_active |= IFM_NONE;
  190                 mii->mii_media_status = 0;
  191                 return;
  192         }
  193 
  194         if ((bmcr & BMCR_LOOP) != 0)
  195                 mii->mii_media_active |= IFM_LOOP;
  196 
  197         if ((ssr & JMPHY_SSR_SPD_DPLX_RESOLVED) == 0) {
  198                 /* Erg, still trying, I guess... */
  199                 mii->mii_media_active |= IFM_NONE;
  200                 return;
  201         }
  202 
  203         switch ((ssr & JMPHY_SSR_SPEED_MASK)) {
  204         case JMPHY_SSR_SPEED_1000:
  205                 mii->mii_media_active |= IFM_1000_T;
  206                 /*
  207                  * jmphy(4) got a valid link so reset mii_ticks.
  208                  * Resetting mii_ticks is needed in order to
  209                  * detect link loss after auto-negotiation.
  210                  */
  211                 sc->mii_ticks = 0;
  212                 break;
  213         case JMPHY_SSR_SPEED_100:
  214                 mii->mii_media_active |= IFM_100_TX;
  215                 sc->mii_ticks = 0;
  216                 break;
  217         case JMPHY_SSR_SPEED_10:
  218                 mii->mii_media_active |= IFM_10_T;
  219                 sc->mii_ticks = 0;
  220                 break;
  221         default:
  222                 mii->mii_media_active |= IFM_NONE;
  223                 return;
  224         }
  225 
  226         if ((ssr & JMPHY_SSR_DUPLEX) != 0)
  227                 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
  228         else
  229                 mii->mii_media_active |= IFM_HDX;
  230 
  231         if (IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T) {
  232                 if ((PHY_READ(sc, MII_100T2SR) & GTSR_MS_RES) != 0)
  233                         mii->mii_media_active |= IFM_ETH_MASTER;
  234         }
  235 }
  236 
  237 static void
  238 jmphy_reset(struct mii_softc *sc)
  239 {
  240         uint16_t t2cr, val;
  241         int i;
  242 
  243         /* Disable sleep mode. */
  244         PHY_WRITE(sc, JMPHY_TMCTL,
  245             PHY_READ(sc, JMPHY_TMCTL) & ~JMPHY_TMCTL_SLEEP_ENB);
  246         PHY_WRITE(sc, MII_BMCR, BMCR_RESET | BMCR_AUTOEN);
  247 
  248         for (i = 0; i < 1000; i++) {
  249                 DELAY(1);
  250                 if ((PHY_READ(sc, MII_BMCR) & BMCR_RESET) == 0)
  251                         break;
  252         }
  253         /* Perform vendor recommended PHY calibration. */
  254         if ((sc->mii_flags & MIIF_PHYPRIV0) != 0) {
  255                 /* Select PHY test mode 1. */
  256                 t2cr = PHY_READ(sc, MII_100T2CR);
  257                 t2cr &= ~GTCR_TEST_MASK;
  258                 t2cr |= 0x2000;
  259                 PHY_WRITE(sc, MII_100T2CR, t2cr);
  260                 /* Apply calibration patch. */
  261                 PHY_WRITE(sc, JMPHY_SPEC_ADDR, JMPHY_SPEC_ADDR_READ |
  262                     JMPHY_EXT_COMM_2);
  263                 val = PHY_READ(sc, JMPHY_SPEC_DATA);
  264                 val &= ~0x0002;
  265                 val |= 0x0010 | 0x0001;
  266                 PHY_WRITE(sc, JMPHY_SPEC_DATA, val);
  267                 PHY_WRITE(sc, JMPHY_SPEC_ADDR, JMPHY_SPEC_ADDR_WRITE |
  268                     JMPHY_EXT_COMM_2);
  269 
  270                 /* XXX 20ms to complete recalibration. */
  271                 DELAY(20 * 1000);
  272 
  273                 PHY_READ(sc, MII_100T2CR);
  274                 PHY_WRITE(sc, JMPHY_SPEC_ADDR, JMPHY_SPEC_ADDR_READ |
  275                     JMPHY_EXT_COMM_2);
  276                 val = PHY_READ(sc, JMPHY_SPEC_DATA);
  277                 val &= ~(0x0001 | 0x0002 | 0x0010);
  278                 PHY_WRITE(sc, JMPHY_SPEC_DATA, val);
  279                 PHY_WRITE(sc, JMPHY_SPEC_ADDR, JMPHY_SPEC_ADDR_WRITE |
  280                     JMPHY_EXT_COMM_2);
  281                 /* Disable PHY test mode. */
  282                 PHY_READ(sc, MII_100T2CR);
  283                 t2cr &= ~GTCR_TEST_MASK;
  284                 PHY_WRITE(sc, MII_100T2CR, t2cr);
  285         }
  286 }
  287 
  288 static uint16_t
  289 jmphy_anar(struct ifmedia_entry *ife)
  290 {
  291         uint16_t anar;
  292 
  293         anar = 0;
  294         switch (IFM_SUBTYPE(ife->ifm_media)) {
  295         case IFM_AUTO:
  296                 anar |= ANAR_TX_FD | ANAR_TX | ANAR_10_FD | ANAR_10;
  297                 break;
  298         case IFM_1000_T:
  299                 break;
  300         case IFM_100_TX:
  301                 anar |= ANAR_TX | ANAR_TX_FD;
  302                 break;
  303         case IFM_10_T:
  304                 anar |= ANAR_10 | ANAR_10_FD;
  305                 break;
  306         default:
  307                 break;
  308         }
  309 
  310         return (anar);
  311 }
  312 
  313 static int
  314 jmphy_setmedia(struct mii_softc *sc, struct ifmedia_entry *ife)
  315 {
  316         uint16_t anar, bmcr, gig;
  317 
  318         gig = 0;
  319         bmcr = PHY_READ(sc, MII_BMCR);
  320         switch (IFM_SUBTYPE(ife->ifm_media)) {
  321         case IFM_AUTO:
  322                 gig |= GTCR_ADV_1000TFDX | GTCR_ADV_1000THDX;
  323                 break;
  324         case IFM_1000_T:
  325                 gig |= GTCR_ADV_1000TFDX | GTCR_ADV_1000THDX;
  326                 break;
  327         case IFM_100_TX:
  328         case IFM_10_T:
  329                 break;
  330         case IFM_NONE:
  331                 PHY_WRITE(sc, MII_BMCR, bmcr | BMCR_ISO | BMCR_PDOWN);
  332                 return (EJUSTRETURN);
  333         default:
  334                 return (EINVAL);
  335         }
  336 
  337         anar = jmphy_anar(ife);
  338         if ((IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO ||
  339             (ife->ifm_media & IFM_FDX) != 0) &&
  340             ((ife->ifm_media & IFM_FLOW) != 0 ||
  341             (sc->mii_flags & MIIF_FORCEPAUSE) != 0))
  342                 anar |= ANAR_PAUSE_TOWARDS;
  343 
  344         if ((sc->mii_flags & MIIF_HAVE_GTCR) != 0) {
  345                 if (IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) {
  346                         gig |= GTCR_MAN_MS;
  347                         if ((ife->ifm_media & IFM_ETH_MASTER) != 0)
  348                                 gig |= GTCR_ADV_MS;
  349                 }
  350                 PHY_WRITE(sc, MII_100T2CR, gig);
  351         }
  352         PHY_WRITE(sc, MII_ANAR, anar | ANAR_CSMA);
  353         PHY_WRITE(sc, MII_BMCR, bmcr | BMCR_AUTOEN | BMCR_STARTNEG);
  354 
  355         return (EJUSTRETURN);
  356 }
Cache object: e497f94a30104ba5e28bb097723c2c52
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/jmphy.c

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