e1000phy.c

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    1 /* $FreeBSD: releng/5.0/sys/dev/mii/e1000phy.c 106107 2002-10-29 00:20:47Z semenu $ */
    2 /*
    3  * Principal Author: Parag Patel
    4  * Copyright (c) 2001
    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  * Additonal Copyright (c) 2001 by Traakan Software under same licence.
   30  * Secondary Author: Matthew Jacob
   31  */
   32 
   33 /*
   34  * driver for the Marvell 88E1000 series external 1000/100/10-BT PHY.
   35  */
   36 
   37 #include <sys/param.h>
   38 #include <sys/systm.h>
   39 #include <sys/kernel.h>
   40 #include <sys/socket.h>
   41 #include <sys/bus.h>
   42 
   43 #include <machine/clock.h>
   44 
   45 #include <net/if.h>
   46 #include <net/if_media.h>
   47 
   48 #include <dev/mii/mii.h>
   49 #include <dev/mii/miivar.h>
   50 #include <dev/mii/miidevs.h>
   51 
   52 #include <dev/mii/e1000phyreg.h>
   53 
   54 #include "miibus_if.h"
   55 
   56 static int e1000phy_probe(device_t);
   57 static int e1000phy_attach(device_t);
   58 
   59 static device_method_t e1000phy_methods[] = {
   60         /* device interface */
   61         DEVMETHOD(device_probe,         e1000phy_probe),
   62         DEVMETHOD(device_attach,        e1000phy_attach),
   63         DEVMETHOD(device_detach,        mii_phy_detach),
   64         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   65         { 0, 0 }
   66 };
   67 
   68 static devclass_t e1000phy_devclass;
   69 static driver_t e1000phy_driver = {
   70         "e1000phy", e1000phy_methods, sizeof (struct mii_softc)
   71 };
   72 DRIVER_MODULE(e1000phy, miibus, e1000phy_driver, e1000phy_devclass, 0, 0);
   73 
   74 static int      e1000phy_service(struct mii_softc *, struct mii_data *, int);
   75 static void     e1000phy_status(struct mii_softc *);
   76 static void     e1000phy_reset(struct mii_softc *);
   77 static int      e1000phy_mii_phy_auto(struct mii_softc *);
   78 
   79 static int e1000phy_debug = 0;
   80 
   81 static int
   82 e1000phy_probe(device_t dev)
   83 {
   84         struct mii_attach_args *ma;
   85         u_int32_t id;
   86 
   87         ma = device_get_ivars(dev);
   88         id = ((ma->mii_id1 << 16) | ma->mii_id2) & E1000_ID_MASK;
   89 
   90         if (id != E1000_ID_88E1000 && id != E1000_ID_88E1000S) {
   91                 return ENXIO;
   92         }
   93 
   94         device_set_desc(dev, MII_STR_MARVELL_E1000);
   95         return 0;
   96 }
   97 
   98 static int
   99 e1000phy_attach(device_t dev)
  100 {
  101         struct mii_softc *sc;
  102         struct mii_attach_args *ma;
  103         struct mii_data *mii;
  104 
  105         getenv_int("e1000phy_debug", &e1000phy_debug);
  106 
  107         sc = device_get_softc(dev);
  108         ma = device_get_ivars(dev);
  109         sc->mii_dev = device_get_parent(dev);
  110         mii = device_get_softc(sc->mii_dev);
  111         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  112 
  113         sc->mii_inst = mii->mii_instance;
  114         sc->mii_phy = ma->mii_phyno;
  115         sc->mii_service = e1000phy_service;
  116         sc->mii_pdata = mii;
  117 
  118         sc->mii_flags |= MIIF_NOISOLATE;
  119         mii->mii_instance++;
  120         e1000phy_reset(sc);
  121 
  122         device_printf(dev, " ");
  123 
  124 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  125 /*
  126         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
  127             E1000_CR_ISOLATE);
  128 */
  129         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst),
  130             E1000_CR_SPEED_10);
  131         printf("10baseT, ");
  132         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst),
  133             E1000_CR_SPEED_10 | E1000_CR_FULL_DUPLEX);
  134         printf("10baseT-FDX, ");
  135         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst),
  136             E1000_CR_SPEED_100);
  137         printf("100baseTX, ");
  138         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst),
  139             E1000_CR_SPEED_100 | E1000_CR_FULL_DUPLEX);
  140         printf("100baseTX-FDX, ");
  141         /*
  142          * 1000BT-simplex not supported; driver must ignore this entry,
  143          * but it must be present in order to manually set full-duplex.
  144          */
  145         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 0, sc->mii_inst),
  146             E1000_CR_SPEED_1000);
  147         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX, sc->mii_inst),
  148             E1000_CR_SPEED_1000 | E1000_CR_FULL_DUPLEX);
  149         printf("1000baseTX-FDX, ");
  150         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
  151         printf("auto\n");
  152 #undef ADD
  153 
  154         MIIBUS_MEDIAINIT(sc->mii_dev);
  155         return(0);
  156 }
  157 
  158 static void
  159 e1000phy_reset(struct mii_softc *sc)
  160 {
  161         u_int32_t reg;
  162         int i;
  163 
  164         /* initialize custom E1000 registers to magic values */
  165         reg = PHY_READ(sc, E1000_SCR);
  166         reg &= ~E1000_SCR_AUTO_X_MODE;
  167         PHY_WRITE(sc, E1000_SCR, reg);
  168 
  169         /* normal PHY reset */
  170         /*mii_phy_reset(sc);*/
  171         reg = PHY_READ(sc, E1000_CR);
  172         reg |= E1000_CR_RESET;
  173         PHY_WRITE(sc, E1000_CR, reg);
  174 
  175         for (i = 0; i < 500; i++) {
  176                 DELAY(1);
  177                 reg = PHY_READ(sc, E1000_CR);
  178                 if (!(reg & E1000_CR_RESET))
  179                         break;
  180         }
  181 
  182         /* set more custom E1000 registers to magic values */
  183         reg = PHY_READ(sc, E1000_SCR);
  184         reg |= E1000_SCR_ASSERT_CRS_ON_TX;
  185         PHY_WRITE(sc, E1000_SCR, reg);
  186 
  187         reg = PHY_READ(sc, E1000_ESCR);
  188         reg |= E1000_ESCR_TX_CLK_25;
  189         PHY_WRITE(sc, E1000_ESCR, reg);
  190 
  191         /* even more magic to reset DSP? */
  192         PHY_WRITE(sc, 29, 0x1d);
  193         PHY_WRITE(sc, 30, 0xc1);
  194         PHY_WRITE(sc, 30, 0x00);
  195 }
  196 
  197 static int
  198 e1000phy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  199 {
  200         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  201         int reg;
  202 
  203         switch (cmd) {
  204         case MII_POLLSTAT:
  205                 /*
  206                  * If we're not polling our PHY instance, just return.
  207                  */
  208                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  209                         return (0);
  210                 break;
  211 
  212         case MII_MEDIACHG:
  213                 /*
  214                  * If the media indicates a different PHY instance,
  215                  * isolate ourselves.
  216                  */
  217                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  218                         reg = PHY_READ(sc, E1000_CR);
  219                         PHY_WRITE(sc, E1000_CR, reg | E1000_CR_ISOLATE);
  220                         return (0);
  221                 }
  222 
  223                 /*
  224                  * If the interface is not up, don't do anything.
  225                  */
  226                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) {
  227                         break;
  228                 }
  229 
  230                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  231                 case IFM_AUTO:
  232                         e1000phy_reset(sc);
  233                         (void)e1000phy_mii_phy_auto(sc);
  234                         break;
  235 
  236                 case IFM_1000_T:
  237                         e1000phy_reset(sc);
  238 
  239                         /* TODO - any other way to force 1000BT? */
  240                         (void)e1000phy_mii_phy_auto(sc);
  241                         break;
  242 
  243                 case IFM_100_TX:
  244                         e1000phy_reset(sc);
  245 
  246                         if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
  247                                 PHY_WRITE(sc, E1000_CR,
  248                                     E1000_CR_FULL_DUPLEX | E1000_CR_SPEED_100);
  249                                 PHY_WRITE(sc, E1000_AR, E1000_AR_100TX_FD);
  250                         } else {
  251                                 PHY_WRITE(sc, E1000_CR, E1000_CR_SPEED_100);
  252                                 PHY_WRITE(sc, E1000_AR, E1000_AR_100TX);
  253                         }
  254                         break;
  255 
  256                 case IFM_10_T:
  257                         e1000phy_reset(sc);
  258 
  259                         if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
  260                                 PHY_WRITE(sc, E1000_CR,
  261                                     E1000_CR_FULL_DUPLEX | E1000_CR_SPEED_10);
  262                                 PHY_WRITE(sc, E1000_AR, E1000_AR_10T_FD);
  263                         } else {
  264                                 PHY_WRITE(sc, E1000_CR, E1000_CR_SPEED_10);
  265                                 PHY_WRITE(sc, E1000_AR, E1000_AR_10T);
  266                         }
  267 
  268                         break;
  269 
  270                 default:
  271                         return (EINVAL);
  272                 }
  273 
  274                 break;
  275 
  276         case MII_TICK:
  277                 /*
  278                  * If we're not currently selected, just return.
  279                  */
  280                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  281                         return (0);
  282                 }
  283 
  284                 /*
  285                  * Is the interface even up?
  286                  */
  287                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  288                         return (0);
  289 
  290                 /*
  291                  * Only used for autonegotiation.
  292                  */
  293                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
  294                         break;
  295 
  296                 /*
  297                  * check for link.
  298                  * Read the status register twice; BMSR_LINK is latch-low.
  299                  */
  300                 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  301                 if (reg & BMSR_LINK)
  302                         break;
  303 
  304                 /*
  305                  * Only retry autonegotiation every 5 seconds.
  306                  */
  307                 if (++sc->mii_ticks != 5)
  308                         return (0);
  309 
  310                 sc->mii_ticks = 0;
  311                 e1000phy_reset(sc);
  312                 e1000phy_mii_phy_auto(sc);
  313                 return (0);
  314         }
  315 
  316         /* Update the media status. */
  317         e1000phy_status(sc);
  318 
  319         /* Callback if something changed. */
  320         mii_phy_update(sc, cmd);
  321         return (0);
  322 }
  323 
  324 static void
  325 e1000phy_status(struct mii_softc *sc)
  326 {
  327         struct mii_data *mii = sc->mii_pdata;
  328         int bmsr, bmcr, esr, ssr, isr, ar, lpar;
  329 
  330         mii->mii_media_status = IFM_AVALID;
  331         mii->mii_media_active = IFM_ETHER;
  332 
  333         bmsr = PHY_READ(sc, E1000_SR) | PHY_READ(sc, E1000_SR);
  334         esr = PHY_READ(sc, E1000_ESR);
  335         bmcr = PHY_READ(sc, E1000_CR);
  336         ssr = PHY_READ(sc, E1000_SSR);
  337         isr = PHY_READ(sc, E1000_ISR);
  338         ar = PHY_READ(sc, E1000_AR);
  339         lpar = PHY_READ(sc, E1000_LPAR);
  340 
  341         if (bmsr & E1000_SR_LINK_STATUS)
  342                 mii->mii_media_status |= IFM_ACTIVE;
  343 
  344         if (bmcr & E1000_CR_LOOPBACK)
  345                 mii->mii_media_active |= IFM_LOOP;
  346 
  347         if ((!(bmsr & E1000_SR_AUTO_NEG_COMPLETE) || !(ssr & E1000_SSR_LINK) ||
  348             !(ssr & E1000_SSR_SPD_DPLX_RESOLVED))) {
  349                 /* Erg, still trying, I guess... */
  350                 mii->mii_media_active |= IFM_NONE;
  351                 return;
  352         }
  353 
  354         if (ssr & E1000_SSR_1000MBS)
  355                 mii->mii_media_active |= IFM_1000_T;
  356         else if (ssr & E1000_SSR_100MBS)
  357                 mii->mii_media_active |= IFM_100_TX;
  358         else
  359                 mii->mii_media_active |= IFM_10_T;
  360 
  361         if (ssr & E1000_SSR_DUPLEX)
  362                 mii->mii_media_active |= IFM_FDX;
  363         else
  364                 mii->mii_media_active |= IFM_HDX;
  365 
  366         /* FLAG0==rx-flow-control FLAG1==tx-flow-control */
  367         if ((ar & E1000_AR_PAUSE) && (lpar & E1000_LPAR_PAUSE)) {
  368                 mii->mii_media_active |= IFM_FLAG0 | IFM_FLAG1;
  369         } else if (!(ar & E1000_AR_PAUSE) && (ar & E1000_AR_ASM_DIR) &&
  370             (lpar & E1000_LPAR_PAUSE) && (lpar & E1000_LPAR_ASM_DIR)) {
  371                 mii->mii_media_active |= IFM_FLAG1;
  372         } else if ((ar & E1000_AR_PAUSE) && (ar & E1000_AR_ASM_DIR) &&
  373             !(lpar & E1000_LPAR_PAUSE) && (lpar & E1000_LPAR_ASM_DIR)) {
  374                 mii->mii_media_active |= IFM_FLAG0;
  375         }
  376 }
  377 
  378 static int
  379 e1000phy_mii_phy_auto(struct mii_softc *mii)
  380 {
  381 
  382         PHY_WRITE(mii, E1000_AR, E1000_AR_10T | E1000_AR_10T_FD |
  383             E1000_AR_100TX | E1000_AR_100TX_FD | 
  384             E1000_AR_PAUSE | E1000_AR_ASM_DIR);
  385         PHY_WRITE(mii, E1000_1GCR, E1000_1GCR_1000T_FD);
  386         PHY_WRITE(mii, E1000_CR,
  387             E1000_CR_AUTO_NEG_ENABLE | E1000_CR_RESTART_AUTO_NEG);
  388 
  389         return (EJUSTRETURN);
  390 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/e1000phy.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/e1000phy.c
