ciphy.c

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    1 /*-
    2  * Copyright (c) 2004
    3  *      Bill Paul <wpaul@windriver.com>.  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, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by Bill Paul.
   16  * 4. Neither the name of the author nor the names of any co-contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
   24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   30  * THE POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD$");
   35 
   36 /*
   37  * Driver for the Cicada/Vitesse CS/VSC8xxx 10/100/1000 copper PHY.
   38  */
   39 
   40 #include <sys/param.h>
   41 #include <sys/systm.h>
   42 #include <sys/kernel.h>
   43 #include <sys/module.h>
   44 #include <sys/socket.h>
   45 #include <sys/bus.h>
   46 
   47 #include <net/if.h>
   48 #include <net/if_arp.h>
   49 #include <net/if_media.h>
   50 
   51 #include <dev/mii/mii.h>
   52 #include <dev/mii/miivar.h>
   53 #include "miidevs.h"
   54 
   55 #include <dev/mii/ciphyreg.h>
   56 
   57 #include "miibus_if.h"
   58 
   59 #include <machine/bus.h>
   60 
   61 static int ciphy_probe(device_t);
   62 static int ciphy_attach(device_t);
   63 
   64 static device_method_t ciphy_methods[] = {
   65         /* device interface */
   66         DEVMETHOD(device_probe,         ciphy_probe),
   67         DEVMETHOD(device_attach,        ciphy_attach),
   68         DEVMETHOD(device_detach,        mii_phy_detach),
   69         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   70         DEVMETHOD_END
   71 };
   72 
   73 static devclass_t ciphy_devclass;
   74 
   75 static driver_t ciphy_driver = {
   76         "ciphy",
   77         ciphy_methods,
   78         sizeof(struct mii_softc)
   79 };
   80 
   81 DRIVER_MODULE(ciphy, miibus, ciphy_driver, ciphy_devclass, 0, 0);
   82 
   83 static int      ciphy_service(struct mii_softc *, struct mii_data *, int);
   84 static void     ciphy_status(struct mii_softc *);
   85 static void     ciphy_reset(struct mii_softc *);
   86 static void     ciphy_fixup(struct mii_softc *);
   87 
   88 static const struct mii_phydesc ciphys[] = {
   89         MII_PHY_DESC(xxCICADA, CS8201),
   90         MII_PHY_DESC(xxCICADA, CS8201A),
   91         MII_PHY_DESC(xxCICADA, CS8201B),
   92         MII_PHY_DESC(xxCICADA, CS8204),
   93         MII_PHY_DESC(xxCICADA, VSC8211),
   94         MII_PHY_DESC(xxCICADA, VSC8221),
   95         MII_PHY_DESC(xxCICADA, CS8244),
   96         MII_PHY_DESC(xxVITESSE, VSC8601),
   97         MII_PHY_DESC(xxVITESSE, VSC8641),
   98         MII_PHY_END
   99 };
  100 
  101 static const struct mii_phy_funcs ciphy_funcs = {
  102         ciphy_service,
  103         ciphy_status,
  104         ciphy_reset
  105 };
  106 
  107 static int
  108 ciphy_probe(device_t dev)
  109 {
  110 
  111         return (mii_phy_dev_probe(dev, ciphys, BUS_PROBE_DEFAULT));
  112 }
  113 
  114 static int
  115 ciphy_attach(device_t dev)
  116 {
  117 
  118         mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
  119             &ciphy_funcs, 1);
  120         return (0);
  121 }
  122 
  123 static int
  124 ciphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  125 {
  126         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  127         int reg, speed, gig;
  128 
  129         switch (cmd) {
  130         case MII_POLLSTAT:
  131                 break;
  132 
  133         case MII_MEDIACHG:
  134                 /*
  135                  * If the interface is not up, don't do anything.
  136                  */
  137                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  138                         break;
  139 
  140                 ciphy_fixup(sc);        /* XXX hardware bug work-around */
  141 
  142                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  143                 case IFM_AUTO:
  144 #ifdef foo
  145                         /*
  146                          * If we're already in auto mode, just return.
  147                          */
  148                         if (PHY_READ(sc, CIPHY_MII_BMCR) & CIPHY_BMCR_AUTOEN)
  149                                 return (0);
  150 #endif
  151                         (void)mii_phy_auto(sc);
  152                         break;
  153                 case IFM_1000_T:
  154                         speed = CIPHY_S1000;
  155                         goto setit;
  156                 case IFM_100_TX:
  157                         speed = CIPHY_S100;
  158                         goto setit;
  159                 case IFM_10_T:
  160                         speed = CIPHY_S10;
  161 setit:
  162                         if ((ife->ifm_media & IFM_FDX) != 0) {
  163                                 speed |= CIPHY_BMCR_FDX;
  164                                 gig = CIPHY_1000CTL_AFD;
  165                         } else
  166                                 gig = CIPHY_1000CTL_AHD;
  167 
  168                         if (IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) {
  169                                 gig |= CIPHY_1000CTL_MSE;
  170                                 if ((ife->ifm_media & IFM_ETH_MASTER) != 0)
  171                                         gig |= CIPHY_1000CTL_MSC;
  172                                 speed |=
  173                                     CIPHY_BMCR_AUTOEN | CIPHY_BMCR_STARTNEG;
  174                         } else
  175                                 gig = 0;
  176                         PHY_WRITE(sc, CIPHY_MII_1000CTL, gig);
  177                         PHY_WRITE(sc, CIPHY_MII_BMCR, speed);
  178                         PHY_WRITE(sc, CIPHY_MII_ANAR, CIPHY_SEL_TYPE);
  179                         break;
  180                 case IFM_NONE:
  181                         PHY_WRITE(sc, MII_BMCR, BMCR_ISO | BMCR_PDOWN);
  182                         break;
  183                 default:
  184                         return (EINVAL);
  185                 }
  186                 break;
  187 
  188         case MII_TICK:
  189                 /*
  190                  * Is the interface even up?
  191                  */
  192                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  193                         return (0);
  194 
  195                 /*
  196                  * Only used for autonegotiation.
  197                  */
  198                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
  199                         break;
  200 
  201                 /*
  202                  * Check to see if we have link.  If we do, we don't
  203                  * need to restart the autonegotiation process.  Read
  204                  * the BMSR twice in case it's latched.
  205                  */
  206                 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  207                 if (reg & BMSR_LINK)
  208                         break;
  209 
  210                 /* Announce link loss right after it happens. */
  211                 if (++sc->mii_ticks == 0)
  212                         break;
  213                 /*
  214                  * Only retry autonegotiation every mii_anegticks seconds.
  215                  */
  216                 if (sc->mii_ticks <= sc->mii_anegticks)
  217                         break;
  218 
  219                 sc->mii_ticks = 0;
  220                 mii_phy_auto(sc);
  221                 break;
  222         }
  223 
  224         /* Update the media status. */
  225         PHY_STATUS(sc);
  226 
  227         /*
  228          * Callback if something changed. Note that we need to poke
  229          * apply fixups for certain PHY revs.
  230          */
  231         if (sc->mii_media_active != mii->mii_media_active ||
  232             sc->mii_media_status != mii->mii_media_status ||
  233             cmd == MII_MEDIACHG) {
  234                 ciphy_fixup(sc);
  235         }
  236         mii_phy_update(sc, cmd);
  237         return (0);
  238 }
  239 
  240 static void
  241 ciphy_status(struct mii_softc *sc)
  242 {
  243         struct mii_data *mii = sc->mii_pdata;
  244         int bmsr, bmcr;
  245 
  246         mii->mii_media_status = IFM_AVALID;
  247         mii->mii_media_active = IFM_ETHER;
  248 
  249         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  250 
  251         if (bmsr & BMSR_LINK)
  252                 mii->mii_media_status |= IFM_ACTIVE;
  253 
  254         bmcr = PHY_READ(sc, CIPHY_MII_BMCR);
  255 
  256         if (bmcr & CIPHY_BMCR_LOOP)
  257                 mii->mii_media_active |= IFM_LOOP;
  258 
  259         if (bmcr & CIPHY_BMCR_AUTOEN) {
  260                 if ((bmsr & CIPHY_BMSR_ACOMP) == 0) {
  261                         /* Erg, still trying, I guess... */
  262                         mii->mii_media_active |= IFM_NONE;
  263                         return;
  264                 }
  265         }
  266 
  267         bmsr = PHY_READ(sc, CIPHY_MII_AUXCSR);
  268         switch (bmsr & CIPHY_AUXCSR_SPEED) {
  269         case CIPHY_SPEED10:
  270                 mii->mii_media_active |= IFM_10_T;
  271                 break;
  272         case CIPHY_SPEED100:
  273                 mii->mii_media_active |= IFM_100_TX;
  274                 break;
  275         case CIPHY_SPEED1000:
  276                 mii->mii_media_active |= IFM_1000_T;
  277                 break;
  278         default:
  279                 device_printf(sc->mii_dev, "unknown PHY speed %x\n",
  280                     bmsr & CIPHY_AUXCSR_SPEED);
  281                 break;
  282         }
  283 
  284         if (bmsr & CIPHY_AUXCSR_FDX)
  285                 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
  286         else
  287                 mii->mii_media_active |= IFM_HDX;
  288 
  289         if ((IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T) &&
  290            (PHY_READ(sc, CIPHY_MII_1000STS) & CIPHY_1000STS_MSR) != 0)
  291                 mii->mii_media_active |= IFM_ETH_MASTER;
  292 }
  293 
  294 static void
  295 ciphy_reset(struct mii_softc *sc)
  296 {
  297 
  298         mii_phy_reset(sc);
  299         DELAY(1000);
  300 }
  301 
  302 #define PHY_SETBIT(x, y, z) \
  303         PHY_WRITE(x, y, (PHY_READ(x, y) | (z)))
  304 #define PHY_CLRBIT(x, y, z) \
  305         PHY_WRITE(x, y, (PHY_READ(x, y) & ~(z)))
  306 
  307 static void
  308 ciphy_fixup(struct mii_softc *sc)
  309 {
  310         uint16_t                model;
  311         uint16_t                status, speed;
  312         uint16_t                val;
  313 
  314         model = MII_MODEL(PHY_READ(sc, CIPHY_MII_PHYIDR2));
  315         status = PHY_READ(sc, CIPHY_MII_AUXCSR);
  316         speed = status & CIPHY_AUXCSR_SPEED;
  317 
  318         if (strcmp(device_get_name(device_get_parent(sc->mii_dev)),
  319             "nfe") == 0) {
  320                 /* need to set for 2.5V RGMII for NVIDIA adapters */
  321                 val = PHY_READ(sc, CIPHY_MII_ECTL1);
  322                 val &= ~(CIPHY_ECTL1_IOVOL | CIPHY_ECTL1_INTSEL);
  323                 val |= (CIPHY_IOVOL_2500MV | CIPHY_INTSEL_RGMII);
  324                 PHY_WRITE(sc, CIPHY_MII_ECTL1, val);
  325                 /* From Linux. */
  326                 val = PHY_READ(sc, CIPHY_MII_AUXCSR);
  327                 val |= CIPHY_AUXCSR_MDPPS;
  328                 PHY_WRITE(sc, CIPHY_MII_AUXCSR, val);
  329                 val = PHY_READ(sc, CIPHY_MII_10BTCSR);
  330                 val |= CIPHY_10BTCSR_ECHO;
  331                 PHY_WRITE(sc, CIPHY_MII_10BTCSR, val);
  332         }
  333 
  334         switch (model) {
  335         case MII_MODEL_xxCICADA_CS8204:
  336         case MII_MODEL_xxCICADA_CS8201:
  337 
  338                 /* Turn off "aux mode" (whatever that means) */
  339                 PHY_SETBIT(sc, CIPHY_MII_AUXCSR, CIPHY_AUXCSR_MDPPS);
  340 
  341                 /*
  342                  * Work around speed polling bug in VT3119/VT3216
  343                  * when using MII in full duplex mode.
  344                  */
  345                 if ((speed == CIPHY_SPEED10 || speed == CIPHY_SPEED100) &&
  346                     (status & CIPHY_AUXCSR_FDX)) {
  347                         PHY_SETBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
  348                 } else {
  349                         PHY_CLRBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
  350                 }
  351 
  352                 /* Enable link/activity LED blink. */
  353                 PHY_SETBIT(sc, CIPHY_MII_LED, CIPHY_LED_LINKACTBLINK);
  354 
  355                 break;
  356 
  357         case MII_MODEL_xxCICADA_CS8201A:
  358         case MII_MODEL_xxCICADA_CS8201B:
  359 
  360                 /*
  361                  * Work around speed polling bug in VT3119/VT3216
  362                  * when using MII in full duplex mode.
  363                  */
  364                 if ((speed == CIPHY_SPEED10 || speed == CIPHY_SPEED100) &&
  365                     (status & CIPHY_AUXCSR_FDX)) {
  366                         PHY_SETBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
  367                 } else {
  368                         PHY_CLRBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
  369                 }
  370 
  371                 break;
  372         case MII_MODEL_xxCICADA_VSC8211:
  373         case MII_MODEL_xxCICADA_VSC8221:
  374         case MII_MODEL_xxCICADA_CS8244:
  375         case MII_MODEL_xxVITESSE_VSC8601:
  376         case MII_MODEL_xxVITESSE_VSC8641:
  377                 break;
  378         default:
  379                 device_printf(sc->mii_dev, "unknown CICADA PHY model %x\n",
  380                     model);
  381                 break;
  382         }
  383 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/ciphy.c

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