e1000phy.c

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    1 /*-
    2  * Principal Author: Parag Patel
    3  * Copyright (c) 2001
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice unmodified, this list of conditions, and the following
   11  *    disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * Additonal Copyright (c) 2001 by Traakan Software under same licence.
   29  * Secondary Author: Matthew Jacob
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD$");
   34 
   35 /*
   36  * driver for the Marvell 88E1000 series external 1000/100/10-BT PHY.
   37  */
   38 
   39 /*
   40  * Support added for the Marvell 88E1011 (Alaska) 1000/100/10baseTX and
   41  * 1000baseSX PHY.
   42  * Nathan Binkert <nate@openbsd.org>
   43  * Jung-uk Kim <jkim@niksun.com>
   44  */
   45 
   46 #include <sys/param.h>
   47 #include <sys/systm.h>
   48 #include <sys/kernel.h>
   49 #include <sys/module.h>
   50 #include <sys/socket.h>
   51 #include <sys/bus.h>
   52 
   53 #include <machine/clock.h>
   54 
   55 #include <net/if.h>
   56 #include <net/if_media.h>
   57 
   58 #include <dev/mii/mii.h>
   59 #include <dev/mii/miivar.h>
   60 #include "miidevs.h"
   61 
   62 #include <dev/mii/e1000phyreg.h>
   63 
   64 #include "miibus_if.h"
   65 
   66 static int e1000phy_probe(device_t);
   67 static int e1000phy_attach(device_t);
   68 
   69 static device_method_t e1000phy_methods[] = {
   70         /* device interface */
   71         DEVMETHOD(device_probe,         e1000phy_probe),
   72         DEVMETHOD(device_attach,        e1000phy_attach),
   73         DEVMETHOD(device_detach,        mii_phy_detach),
   74         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   75         { 0, 0 }
   76 };
   77 
   78 static devclass_t e1000phy_devclass;
   79 static driver_t e1000phy_driver = {
   80         "e1000phy", e1000phy_methods, sizeof (struct mii_softc)
   81 };
   82 DRIVER_MODULE(e1000phy, miibus, e1000phy_driver, e1000phy_devclass, 0, 0);
   83 
   84 static int      e1000phy_service(struct mii_softc *, struct mii_data *, int);
   85 static void     e1000phy_status(struct mii_softc *);
   86 static void     e1000phy_reset(struct mii_softc *);
   87 static int      e1000phy_mii_phy_auto(struct mii_softc *);
   88 
   89 static int e1000phy_debug = 0;
   90 
   91 static int
   92 e1000phy_probe(device_t dev)
   93 {
   94         struct mii_attach_args *ma;
   95         u_int32_t id;
   96 
   97         ma = device_get_ivars(dev);
   98         id = ((ma->mii_id1 << 16) | ma->mii_id2) & E1000_ID_MASK;
   99         if (id != E1000_ID_88E1000
  100             && id != E1000_ID_88E1000S
  101             && id != E1000_ID_88E1011) {
  102                 return ENXIO;
  103         }
  104 
  105         device_set_desc(dev, MII_STR_MARVELL_E1000);
  106         return 0;
  107 }
  108 
  109 static int
  110 e1000phy_attach(device_t dev)
  111 {
  112         struct mii_softc *sc;
  113         struct mii_attach_args *ma;
  114         struct mii_data *mii;
  115         u_int32_t id;
  116 
  117         getenv_int("e1000phy_debug", &e1000phy_debug);
  118 
  119         sc = device_get_softc(dev);
  120         ma = device_get_ivars(dev);
  121         sc->mii_dev = device_get_parent(dev);
  122         mii = device_get_softc(sc->mii_dev);
  123         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
  124 
  125         sc->mii_inst = mii->mii_instance;
  126         sc->mii_phy = ma->mii_phyno;
  127         sc->mii_service = e1000phy_service;
  128         sc->mii_pdata = mii;
  129         sc->mii_flags |= MIIF_NOISOLATE;
  130 
  131         id = ((ma->mii_id1 << 16) | ma->mii_id2) & E1000_ID_MASK;
  132         if (id == E1000_ID_88E1011
  133             && (PHY_READ(sc, E1000_ESSR) & E1000_ESSR_FIBER_LINK))
  134                 sc->mii_flags |= MIIF_HAVEFIBER;
  135         mii->mii_instance++;
  136         e1000phy_reset(sc);
  137 
  138         device_printf(dev, " ");
  139 
  140 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
  141         if ((sc->mii_flags & MIIF_HAVEFIBER) == 0) {
  142 #if 0
  143                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
  144                     E1000_CR_ISOLATE);
  145 #endif
  146                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst),
  147                     E1000_CR_SPEED_10);
  148                 printf("10baseT, ");
  149                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst),
  150                     E1000_CR_SPEED_10 | E1000_CR_FULL_DUPLEX);
  151                 printf("10baseT-FDX, ");
  152                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst),
  153                     E1000_CR_SPEED_100);
  154                 printf("100baseTX, ");
  155                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst),
  156                     E1000_CR_SPEED_100 | E1000_CR_FULL_DUPLEX);
  157                 printf("100baseTX-FDX, ");
  158                 /*
  159                  * 1000BT-simplex not supported; driver must ignore this entry,
  160                  * but it must be present in order to manually set full-duplex.
  161                  */
  162                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 0, sc->mii_inst),
  163                     E1000_CR_SPEED_1000);
  164                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX, sc->mii_inst),
  165                     E1000_CR_SPEED_1000 | E1000_CR_FULL_DUPLEX);
  166                 printf("1000baseTX-FDX, ");
  167         } else {
  168                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst),
  169                     E1000_CR_SPEED_1000 | E1000_CR_FULL_DUPLEX);
  170                 printf("1000baseSX-FDX, ");
  171         }
  172         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
  173         printf("auto\n");
  174 #undef ADD
  175 
  176         MIIBUS_MEDIAINIT(sc->mii_dev);
  177         return(0);
  178 }
  179 
  180 static void
  181 e1000phy_reset(struct mii_softc *sc)
  182 {
  183         u_int32_t reg;
  184         int i;
  185 
  186         /* initialize custom E1000 registers to magic values */
  187         reg = PHY_READ(sc, E1000_SCR);
  188         reg &= ~E1000_SCR_AUTO_X_MODE;
  189         PHY_WRITE(sc, E1000_SCR, reg);
  190 
  191         /* normal PHY reset */
  192         /*mii_phy_reset(sc);*/
  193         reg = PHY_READ(sc, E1000_CR);
  194         reg |= E1000_CR_RESET;
  195         PHY_WRITE(sc, E1000_CR, reg);
  196 
  197         for (i = 0; i < 500; i++) {
  198                 DELAY(1);
  199                 reg = PHY_READ(sc, E1000_CR);
  200                 if (!(reg & E1000_CR_RESET))
  201                         break;
  202         }
  203 
  204         /* set more custom E1000 registers to magic values */
  205         reg = PHY_READ(sc, E1000_SCR);
  206         reg |= E1000_SCR_ASSERT_CRS_ON_TX;
  207         PHY_WRITE(sc, E1000_SCR, reg);
  208 
  209         reg = PHY_READ(sc, E1000_ESCR);
  210         reg |= E1000_ESCR_TX_CLK_25;
  211         PHY_WRITE(sc, E1000_ESCR, reg);
  212 
  213         /* even more magic to reset DSP? */
  214         PHY_WRITE(sc, 29, 0x1d);
  215         PHY_WRITE(sc, 30, 0xc1);
  216         PHY_WRITE(sc, 30, 0x00);
  217 }
  218 
  219 static int
  220 e1000phy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  221 {
  222         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  223         int reg;
  224 
  225         switch (cmd) {
  226         case MII_POLLSTAT:
  227                 /*
  228                  * If we're not polling our PHY instance, just return.
  229                  */
  230                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  231                         return (0);
  232                 break;
  233 
  234         case MII_MEDIACHG:
  235                 /*
  236                  * If the media indicates a different PHY instance,
  237                  * isolate ourselves.
  238                  */
  239                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  240                         reg = PHY_READ(sc, E1000_CR);
  241                         PHY_WRITE(sc, E1000_CR, reg | E1000_CR_ISOLATE);
  242                         return (0);
  243                 }
  244 
  245                 /*
  246                  * If the interface is not up, don't do anything.
  247                  */
  248                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) {
  249                         break;
  250                 }
  251 
  252                 switch (IFM_SUBTYPE(ife->ifm_media)) {
  253                 case IFM_AUTO:
  254                         e1000phy_reset(sc);
  255                         (void)e1000phy_mii_phy_auto(sc);
  256                         break;
  257 
  258                 case IFM_1000_T:
  259                         e1000phy_reset(sc);
  260 
  261                         /* TODO - any other way to force 1000BT? */
  262                         (void)e1000phy_mii_phy_auto(sc);
  263                         break;
  264 
  265                 case IFM_1000_SX:
  266                         e1000phy_reset(sc);
  267 
  268                         PHY_WRITE(sc, E1000_CR,
  269                             E1000_CR_FULL_DUPLEX | E1000_CR_SPEED_1000);
  270                         PHY_WRITE(sc, E1000_AR, E1000_FA_1000X_FD);
  271                         break;
  272 
  273                 case IFM_100_TX:
  274                         e1000phy_reset(sc);
  275 
  276                         if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
  277                                 PHY_WRITE(sc, E1000_CR,
  278                                     E1000_CR_FULL_DUPLEX | E1000_CR_SPEED_100);
  279                                 PHY_WRITE(sc, E1000_AR, E1000_AR_100TX_FD);
  280                         } else {
  281                                 PHY_WRITE(sc, E1000_CR, E1000_CR_SPEED_100);
  282                                 PHY_WRITE(sc, E1000_AR, E1000_AR_100TX);
  283                         }
  284                         break;
  285 
  286                 case IFM_10_T:
  287                         e1000phy_reset(sc);
  288 
  289                         if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
  290                                 PHY_WRITE(sc, E1000_CR,
  291                                     E1000_CR_FULL_DUPLEX | E1000_CR_SPEED_10);
  292                                 PHY_WRITE(sc, E1000_AR, E1000_AR_10T_FD);
  293                         } else {
  294                                 PHY_WRITE(sc, E1000_CR, E1000_CR_SPEED_10);
  295                                 PHY_WRITE(sc, E1000_AR, E1000_AR_10T);
  296                         }
  297 
  298                         break;
  299 
  300                 default:
  301                         return (EINVAL);
  302                 }
  303 
  304                 break;
  305 
  306         case MII_TICK:
  307                 /*
  308                  * If we're not currently selected, just return.
  309                  */
  310                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  311                         return (0);
  312                 }
  313 
  314                 /*
  315                  * Is the interface even up?
  316                  */
  317                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  318                         return (0);
  319 
  320                 /*
  321                  * Only used for autonegotiation.
  322                  */
  323                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
  324                         break;
  325 
  326                 /*
  327                  * check for link.
  328                  * Read the status register twice; BMSR_LINK is latch-low.
  329                  */
  330                 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  331                 if (reg & BMSR_LINK)
  332                         break;
  333 
  334                 /*
  335                  * Only retry autonegotiation every 5 seconds.
  336                  */
  337                 if (++sc->mii_ticks <= 5)
  338                         break;
  339 
  340                 sc->mii_ticks = 0;
  341                 e1000phy_reset(sc);
  342                 e1000phy_mii_phy_auto(sc);
  343                 return (0);
  344         }
  345 
  346         /* Update the media status. */
  347         e1000phy_status(sc);
  348 
  349         /* Callback if something changed. */
  350         mii_phy_update(sc, cmd);
  351         return (0);
  352 }
  353 
  354 static void
  355 e1000phy_status(struct mii_softc *sc)
  356 {
  357         struct mii_data *mii = sc->mii_pdata;
  358         int bmsr, bmcr, esr, ssr, isr, ar, lpar;
  359 
  360         mii->mii_media_status = IFM_AVALID;
  361         mii->mii_media_active = IFM_ETHER;
  362 
  363         bmsr = PHY_READ(sc, E1000_SR) | PHY_READ(sc, E1000_SR);
  364         esr = PHY_READ(sc, E1000_ESR);
  365         bmcr = PHY_READ(sc, E1000_CR);
  366         ssr = PHY_READ(sc, E1000_SSR);
  367         isr = PHY_READ(sc, E1000_ISR);
  368         ar = PHY_READ(sc, E1000_AR);
  369         lpar = PHY_READ(sc, E1000_LPAR);
  370 
  371         if (bmsr & E1000_SR_LINK_STATUS)
  372                 mii->mii_media_status |= IFM_ACTIVE;
  373 
  374         if (bmcr & E1000_CR_LOOPBACK)
  375                 mii->mii_media_active |= IFM_LOOP;
  376 
  377         if ((!(bmsr & E1000_SR_AUTO_NEG_COMPLETE) || !(ssr & E1000_SSR_LINK) ||
  378             !(ssr & E1000_SSR_SPD_DPLX_RESOLVED))) {
  379                 /* Erg, still trying, I guess... */
  380                 mii->mii_media_active |= IFM_NONE;
  381                 return;
  382         }
  383 
  384         if ((sc->mii_flags & MIIF_HAVEFIBER) == 0) {
  385                 if (ssr & E1000_SSR_1000MBS)
  386                         mii->mii_media_active |= IFM_1000_T;
  387                 else if (ssr & E1000_SSR_100MBS)
  388                         mii->mii_media_active |= IFM_100_TX;
  389                 else
  390                         mii->mii_media_active |= IFM_10_T;
  391         } else {
  392                 if (ssr & E1000_SSR_1000MBS)
  393                         mii->mii_media_active |= IFM_1000_SX;
  394         }
  395 
  396         if (ssr & E1000_SSR_DUPLEX)
  397                 mii->mii_media_active |= IFM_FDX;
  398         else
  399                 mii->mii_media_active |= IFM_HDX;
  400 
  401         if ((sc->mii_flags & MIIF_HAVEFIBER) == 0) {
  402                 /* FLAG0==rx-flow-control FLAG1==tx-flow-control */
  403                 if ((ar & E1000_AR_PAUSE) && (lpar & E1000_LPAR_PAUSE)) {
  404                         mii->mii_media_active |= IFM_FLAG0 | IFM_FLAG1;
  405                 } else if (!(ar & E1000_AR_PAUSE) && (ar & E1000_AR_ASM_DIR) &&
  406                     (lpar & E1000_LPAR_PAUSE) && (lpar & E1000_LPAR_ASM_DIR)) {
  407                         mii->mii_media_active |= IFM_FLAG1;
  408                 } else if ((ar & E1000_AR_PAUSE) && (ar & E1000_AR_ASM_DIR) &&
  409                     !(lpar & E1000_LPAR_PAUSE) && (lpar & E1000_LPAR_ASM_DIR)) {
  410                         mii->mii_media_active |= IFM_FLAG0;
  411                 }
  412         }
  413 }
  414 
  415 static int
  416 e1000phy_mii_phy_auto(struct mii_softc *mii)
  417 {
  418 
  419         if ((mii->mii_flags & MIIF_HAVEFIBER) == 0) {
  420                 PHY_WRITE(mii, E1000_AR, E1000_AR_10T | E1000_AR_10T_FD |
  421                     E1000_AR_100TX | E1000_AR_100TX_FD | 
  422                     E1000_AR_PAUSE | E1000_AR_ASM_DIR);
  423                 PHY_WRITE(mii, E1000_1GCR, E1000_1GCR_1000T_FD);
  424                 PHY_WRITE(mii, E1000_CR,
  425                     E1000_CR_AUTO_NEG_ENABLE | E1000_CR_RESTART_AUTO_NEG);
  426         }
  427 
  428         return (EJUSTRETURN);
  429 }
Cache object: 2911042e07c3fc9c74085e2e2e021da2
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/e1000phy.c

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