sys/dev/netif/mii_layer/e1000phy.c

   1 /* $FreeBSD: src/sys/dev/mii/e1000phy.c,v 1.18 2006/12/11 11:09:48 yongari Exp $ */
   2 /* $DragonFly: src/sys/dev/netif/mii_layer/e1000phy.c,v 1.11 2008/03/16 15:50:22 hasso Exp $ */
   3 /*      $OpenBSD: eephy.c,v 1.26 2006/06/08 00:27:12 brad Exp $ */
   4 /*
   5  * Principal Author: Parag Patel
   6  * Copyright (c) 2001
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice unmodified, this list of conditions, and the following
  14  *    disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * Additonal Copyright (c) 2001 by Traakan Software under same licence.
  32  * Secondary Author: Matthew Jacob
  33  */
  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) 1000/100/10baseT 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/socket.h>
  50 #include <sys/bus.h>
  51
  52 #include <net/if.h>
  53 #include <net/if_media.h>
  54
  55 #include "mii.h"
  56 #include "miivar.h"
  57 #include "miidevs.h"
  58
  59 #include "e1000phyreg.h"
  60
  61 #include "miibus_if.h"
  62
  63 static int      e1000phy_probe(device_t);
  64 static int      e1000phy_attach(device_t);
  65 static int      e1000phy_service(struct mii_softc *, struct mii_data *, int);
  66 static void     e1000phy_status(struct mii_softc *);
  67 static void     e1000phy_mii_phy_auto(struct mii_softc *);
  68 static void     e1000phy_reset(struct mii_softc *);
  69
  70 static device_method_t e1000phy_methods[] = {
  71         /* device interface */
  72         DEVMETHOD(device_probe,         e1000phy_probe),
  73         DEVMETHOD(device_attach,        e1000phy_attach),
  74         DEVMETHOD(device_detach,        ukphy_detach),
  75         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  76         { 0, 0 }
  77 };
  78
  79 static const struct mii_phydesc e1000phys[] = {
  80         MII_PHYDESC(xxMARVELL,  E1000_2),
  81         MII_PHYDESC(xxMARVELL,  E1000_3),
  82         MII_PHYDESC(xxMARVELL,  E1000_5),
  83         MII_PHYDESC(xxMARVELL,  E1111),
  84         MII_PHYDESC(MARVELL,    E1000),
  85         MII_PHYDESC(MARVELL,    E1011),
  86         MII_PHYDESC(MARVELL,    E1000_3),
  87         MII_PHYDESC(MARVELL,    E1000_4),
  88         MII_PHYDESC(MARVELL,    E1000_5),
  89         MII_PHYDESC(MARVELL,    E1000_6),
  90         MII_PHYDESC(MARVELL,    E3082),
  91         MII_PHYDESC(MARVELL,    E1112),
  92         MII_PHYDESC(MARVELL,    E1149),
  93         MII_PHYDESC(MARVELL,    E1111),
  94         MII_PHYDESC(MARVELL,    E1116),
  95         MII_PHYDESC(MARVELL,    E1118),
  96         MII_PHYDESC_NULL
  97 };
  98
  99 static devclass_t e1000phy_devclass;
 100
 101 static driver_t e1000phy_driver = {
 102         "e1000phy",
 103         e1000phy_methods,
 104         sizeof(struct mii_softc)
 105 };
 106 DRIVER_MODULE(e1000phy, miibus, e1000phy_driver, e1000phy_devclass, 0, 0);
 107
 108 static int
 109 e1000phy_probe(device_t dev)
 110 {
 111         struct mii_attach_args *ma = device_get_ivars(dev);
 112         const struct mii_phydesc *mpd;
 113
 114         mpd = mii_phy_match(ma, e1000phys);
 115         if (mpd != NULL) {
 116                 device_set_desc(dev, mpd->mpd_name);
 117                 return 0;
 118         }
 119         return (ENXIO);
 120 }
 121
 122 static int
 123 e1000phy_attach(device_t dev)
 124 {
 125         struct mii_softc *sc;
 126         struct mii_attach_args *ma;
 127         struct mii_data *mii;
 128         const char *sep = "";
 129         int fast_ether = 0;
 130
 131         sc = device_get_softc(dev);
 132         ma = device_get_ivars(dev);
 133         mii_softc_init(sc, ma);
 134         sc->mii_dev = device_get_parent(dev);
 135         mii = device_get_softc(sc->mii_dev);
 136         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
 137
 138         sc->mii_inst = mii->mii_instance;
 139         sc->mii_service = e1000phy_service;
 140         sc->mii_reset = e1000phy_reset;
 141         sc->mii_anegticks = MII_ANEGTICKS_GIGE;
 142         sc->mii_pdata = mii;
 143
 144         sc->mii_flags |= MIIF_NOISOLATE;
 145
 146         switch (sc->mii_model) {
 147         case MII_MODEL_MARVELL_E1011:
 148         case MII_MODEL_MARVELL_E1112:
 149                 if (PHY_READ(sc, E1000_ESSR) & E1000_ESSR_FIBER_LINK)
 150                         sc->mii_flags |= MIIF_HAVEFIBER;
 151                 break;
 152         case MII_MODEL_MARVELL_E3082:
 153                 /* 88E3082 10/100 Fast Ethernet PHY. */
 154                 sc->mii_anegticks = MII_ANEGTICKS;
 155                 fast_ether = 1;
 156                 break;
 157         }
 158
 159         mii->mii_instance++;
 160
 161         e1000phy_reset(sc);
 162
 163 #define ADD(m, c)       ifmedia_add(&mii->mii_media, (m), (c), NULL)
 164 #define PRINT(s)        kprintf("%s%s", sep, s); sep = ", "
 165
 166         device_printf(dev, "%s", "");
 167
 168         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
 169             E1000_CR_ISOLATE);
 170         if ((sc->mii_flags & MIIF_HAVEFIBER) == 0) {
 171                 if (!fast_ether) {
 172                         /*
 173                          * 1000T-simplex not supported; driver must ignore
 174                          * this entry, but it must be present in order to
 175                          * manually set full-duplex.
 176                          */
 177                         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 0,
 178                             sc->mii_inst), E1000_CR_SPEED_1000);
 179                         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX,
 180                             sc->mii_inst),
 181                             E1000_CR_SPEED_1000 | E1000_CR_FULL_DUPLEX);
 182                         PRINT("1000baseT-FDX");
 183                 }
 184                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst),
 185                     E1000_CR_SPEED_100 | E1000_CR_FULL_DUPLEX);
 186                 PRINT("100baseTX-FDX");
 187                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst),
 188                     E1000_CR_SPEED_100);
 189                 PRINT("100baseTX");
 190                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst),
 191                     E1000_CR_SPEED_10 | E1000_CR_FULL_DUPLEX);
 192                 PRINT("10baseTX-FDX");
 193                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst),
 194                     E1000_CR_SPEED_10);
 195                 PRINT("10baseTX");
 196         } else {
 197                 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst),
 198                     E1000_CR_SPEED_1000 | E1000_CR_FULL_DUPLEX);
 199                 PRINT("1000baseSX-FDX");
 200         }
 201
 202         ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
 203         PRINT("auto\n");
 204
 205 #undef ADD
 206 #undef PRINT
 207
 208         MIIBUS_MEDIAINIT(sc->mii_dev);
 209         return(0);
 210 }
 211
 212 static void
 213 e1000phy_reset(struct mii_softc *sc)
 214 {
 215         uint16_t reg;
 216
 217         reg = PHY_READ(sc, E1000_SCR);
 218         if ((sc->mii_flags & MIIF_HAVEFIBER) != 0) {
 219                 reg &= ~E1000_SCR_AUTO_X_MODE;
 220                 PHY_WRITE(sc, E1000_SCR, reg);
 221                 if (sc->mii_model == MII_MODEL_MARVELL_E1112) {
 222                         /* Select 1000BASE-X only mode. */
 223                         PHY_WRITE(sc, E1000_EADR, 2);
 224                         reg = PHY_READ(sc, E1000_SCR);
 225                         reg &= ~E1000_SCR_MODE_MASK;
 226                         reg |= E1000_SCR_MODE_1000BX;
 227                         PHY_WRITE(sc, E1000_SCR, reg);
 228                         PHY_WRITE(sc, E1000_EADR, 1);
 229                 }
 230         } else {
 231                 switch (sc->mii_model) {
 232                 case MII_MODEL_MARVELL_E1111:
 233                 case MII_MODEL_MARVELL_E1112:
 234                 case MII_MODEL_MARVELL_E1116:
 235                 case MII_MODEL_MARVELL_E1118:
 236                 case MII_MODEL_MARVELL_E1149:
 237                         /* Disable energy detect mode. */
 238                         reg &= ~E1000_SCR_EN_DETECT_MASK;
 239                         reg |= E1000_SCR_AUTO_X_MODE;
 240                         break;
 241                 case MII_MODEL_MARVELL_E3082:
 242                         reg |= (E1000_SCR_AUTO_X_MODE >> 1);
 243                         break;
 244                 default:
 245                         reg &= ~E1000_SCR_AUTO_X_MODE;
 246                         break;
 247                 }
 248                 /* Enable CRS on TX. */
 249                 reg |= E1000_SCR_ASSERT_CRS_ON_TX;
 250                 /* Auto correction for reversed cable polarity. */
 251                 reg &= ~E1000_SCR_POLARITY_REVERSAL;
 252                 PHY_WRITE(sc, E1000_SCR, reg);
 253         }
 254
 255         switch (MII_MODEL(sc->mii_model)) {
 256         case MII_MODEL_MARVELL_E3082:
 257         case MII_MODEL_MARVELL_E1112:
 258         case MII_MODEL_MARVELL_E1116:
 259         case MII_MODEL_MARVELL_E1118:
 260         case MII_MODEL_MARVELL_E1149:
 261                 break;
 262         default:
 263                 /* Force TX_CLK to 25MHz clock. */
 264                 reg = PHY_READ(sc, E1000_ESCR);
 265                 reg |= E1000_ESCR_TX_CLK_25;
 266                 PHY_WRITE(sc, E1000_ESCR, reg);
 267                 break;
 268         }
 269
 270         /* Reset the PHY so all changes take effect. */
 271         reg = PHY_READ(sc, E1000_CR);
 272         reg |= E1000_CR_RESET;
 273         PHY_WRITE(sc, E1000_CR, reg);
 274 }
 275
 276 static int
 277 e1000phy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 278 {
 279         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 280         uint16_t speed, gig;
 281         int reg;
 282
 283         switch (cmd) {
 284         case MII_POLLSTAT:
 285                 /*
 286                  * If we're not polling our PHY instance, just return.
 287                  */
 288                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 289                         return (0);
 290                 break;
 291
 292         case MII_MEDIACHG:
 293                 /*
 294                  * If the media indicates a different PHY instance,
 295                  * isolate ourselves.
 296                  */
 297                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 298                         reg = PHY_READ(sc, E1000_CR);
 299                         PHY_WRITE(sc, E1000_CR, reg | E1000_CR_ISOLATE);
 300                         return (0);
 301                 }
 302
 303                 /*
 304                  * If the interface is not up, don't do anything.
 305                  */
 306                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 307                         break;
 308
 309                 if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO) {
 310                         e1000phy_mii_phy_auto(sc);
 311                         break;
 312                 }
 313
 314                 speed = 0;
 315                 switch (IFM_SUBTYPE(ife->ifm_media)) {
 316                 case IFM_1000_T:
 317                         if (sc->mii_model == MII_MODEL_MARVELL_E3082)
 318                                 return (EINVAL);
 319                         speed = E1000_CR_SPEED_1000;
 320                         break;
 321                 case IFM_1000_SX:
 322                         if (sc->mii_model == MII_MODEL_MARVELL_E3082)
 323                                 return (EINVAL);
 324                         speed = E1000_CR_SPEED_1000;
 325                         break;
 326                 case IFM_100_TX:
 327                         speed = E1000_CR_SPEED_100;
 328                         break;
 329                 case IFM_10_T:
 330                         speed = E1000_CR_SPEED_10;
 331                         break;
 332                 case IFM_NONE:
 333                         reg = PHY_READ(sc, E1000_CR);
 334                         PHY_WRITE(sc, E1000_CR,
 335                             reg | E1000_CR_ISOLATE | E1000_CR_POWER_DOWN);
 336                         goto done;
 337                 default:
 338                         return (EINVAL);
 339                 }
 340
 341                 if (((ife->ifm_media & IFM_GMASK) & IFM_FDX) != 0) {
 342                         speed |= E1000_CR_FULL_DUPLEX;
 343                         gig = E1000_1GCR_1000T_FD;
 344                 } else {
 345                         gig = E1000_1GCR_1000T;
 346                 }
 347
 348                 reg = PHY_READ(sc, E1000_CR);
 349                 reg &= ~E1000_CR_AUTO_NEG_ENABLE;
 350                 PHY_WRITE(sc, E1000_CR, reg | E1000_CR_RESET);
 351
 352                 /*
 353                  * When setting the link manually, one side must
 354                  * be the master and the other the slave. However
 355                  * ifmedia doesn't give us a good way to specify
 356                  * this, so we fake it by using one of the LINK
 357                  * flags. If LINK0 is set, we program the PHY to
 358                  * be a master, otherwise it's a slave.
 359                  */
 360                 if (IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T ||
 361                     IFM_SUBTYPE(ife->ifm_media) == IFM_1000_SX) {
 362                         if (mii->mii_ifp->if_flags & IFF_LINK0) {
 363                                 PHY_WRITE(sc, E1000_1GCR, gig |
 364                                     E1000_1GCR_MS_ENABLE | E1000_1GCR_MS_VALUE);
 365                         } else {
 366                                 PHY_WRITE(sc, E1000_1GCR, gig |
 367                                     E1000_1GCR_MS_ENABLE);
 368                         }
 369                 } else {
 370                         if (sc->mii_model != MII_MODEL_MARVELL_E3082)
 371                                 PHY_WRITE(sc, E1000_1GCR, 0);
 372                 }
 373                 PHY_WRITE(sc, E1000_AR, E1000_AR_SELECTOR_FIELD);
 374                 PHY_WRITE(sc, E1000_CR, speed | E1000_CR_RESET);
 375 done:
 376                 break;
 377
 378         case MII_TICK:
 379                 /*
 380                  * If we're not currently selected, just return.
 381                  */
 382                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 383                         return (0);
 384
 385                 /*
 386                  * Is the interface even up?
 387                  */
 388                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 389                         return (0);
 390
 391                 /*
 392                  * Only used for autonegotiation.
 393                  */
 394                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
 395                         break;
 396
 397                 /*
 398                  * Check to see if we have link.  If we do, we don't
 399                  * need to restart the autonegotiation process.  Read
 400                  * the BMSR twice in case it's latched.
 401                  */
 402                 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
 403                 if (reg & BMSR_LINK) {
 404                         sc->mii_ticks = 0;
 405                         break;
 406                 }
 407
 408                 /*
 409                  * Only retry autonegotiation every mii_anegticks seconds.
 410                  */
 411                 if (++sc->mii_ticks != sc->mii_anegticks)
 412                         return (0);
 413                 sc->mii_ticks = 0;
 414
 415                 e1000phy_reset(sc);
 416                 e1000phy_mii_phy_auto(sc);
 417                 break;
 418         }
 419
 420         /* Update the media status. */
 421         e1000phy_status(sc);
 422
 423         /* Callback if something changed. */
 424         mii_phy_update(sc, cmd);
 425         return (0);
 426 }
 427
 428 static void
 429 e1000phy_status(struct mii_softc *sc)
 430 {
 431         struct mii_data *mii = sc->mii_pdata;
 432         int bmsr, bmcr, esr, gsr, ssr, isr, ar, lpar;
 433
 434         mii->mii_media_status = IFM_AVALID;
 435         mii->mii_media_active = IFM_ETHER;
 436
 437         bmsr = PHY_READ(sc, E1000_SR) | PHY_READ(sc, E1000_SR);
 438         esr = PHY_READ(sc, E1000_ESR);
 439         bmcr = PHY_READ(sc, E1000_CR);
 440         ssr = PHY_READ(sc, E1000_SSR);
 441         isr = PHY_READ(sc, E1000_ISR);
 442         ar = PHY_READ(sc, E1000_AR);
 443         lpar = PHY_READ(sc, E1000_LPAR);
 444
 445         if (bmsr & E1000_SR_LINK_STATUS)
 446                 mii->mii_media_status |= IFM_ACTIVE;
 447
 448         if (bmcr & E1000_CR_LOOPBACK)
 449                 mii->mii_media_active |= IFM_LOOP;
 450
 451         if (((bmcr & E1000_CR_AUTO_NEG_ENABLE) != 0 &&
 452              (bmsr & E1000_SR_AUTO_NEG_COMPLETE) == 0) ||
 453             (ssr & E1000_SSR_LINK) == 0 ||
 454             (ssr & E1000_SSR_SPD_DPLX_RESOLVED) == 0) {
 455                 /* Erg, still trying, I guess... */
 456                 mii->mii_media_active |= IFM_NONE;
 457                 return;
 458         }
 459
 460         if ((sc->mii_flags & MIIF_HAVEFIBER) == 0) {
 461                 if (ssr & E1000_SSR_1000MBS)
 462                         mii->mii_media_active |= IFM_1000_T;
 463                 else if (ssr & E1000_SSR_100MBS)
 464                         mii->mii_media_active |= IFM_100_TX;
 465                 else
 466                         mii->mii_media_active |= IFM_10_T;
 467         } else {
 468                 if (ssr & E1000_SSR_1000MBS)
 469                         mii->mii_media_active |= IFM_1000_SX;
 470         }
 471
 472         if (ssr & E1000_SSR_DUPLEX)
 473                 mii->mii_media_active |= IFM_FDX;
 474         else
 475                 mii->mii_media_active |= IFM_HDX;
 476
 477         if ((sc->mii_flags & MIIF_HAVEFIBER) == 0) {
 478                 /* FLAG0==rx-flow-control FLAG1==tx-flow-control */
 479                 if ((ar & E1000_AR_PAUSE) && (lpar & E1000_LPAR_PAUSE)) {
 480                         mii->mii_media_active |= IFM_FLAG0 | IFM_FLAG1;
 481                 } else if (!(ar & E1000_AR_PAUSE) && (ar & E1000_AR_ASM_DIR) &&
 482                     (lpar & E1000_LPAR_PAUSE) && (lpar & E1000_LPAR_ASM_DIR)) {
 483                         mii->mii_media_active |= IFM_FLAG1;
 484                 } else if ((ar & E1000_AR_PAUSE) && (ar & E1000_AR_ASM_DIR) &&
 485                     !(lpar & E1000_LPAR_PAUSE) && (lpar & E1000_LPAR_ASM_DIR)) {
 486                         mii->mii_media_active |= IFM_FLAG0;
 487                 }
 488         }
 489
 490         /* FLAG2 : local PHY resolved to MASTER */
 491         if (IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T ||
 492             IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_SX) {
 493                 PHY_READ(sc, E1000_1GSR);
 494                 gsr = PHY_READ(sc, E1000_1GSR);
 495                 if ((gsr & E1000_1GSR_MS_CONFIG_RES) != 0)
 496                         mii->mii_media_active |= IFM_FLAG2;
 497         }
 498 }
 499
 500 static void
 501 e1000phy_mii_phy_auto(struct mii_softc *sc)
 502 {
 503         if ((sc->mii_flags & MIIF_HAVEFIBER) == 0) {
 504                 PHY_WRITE(sc, E1000_AR, E1000_AR_10T | E1000_AR_10T_FD |
 505                     E1000_AR_100TX | E1000_AR_100TX_FD |
 506                     E1000_AR_PAUSE | E1000_AR_ASM_DIR);
 507         } else {
 508                 PHY_WRITE(sc, E1000_AR, E1000_FA_1000X_FD | E1000_FA_1000X |
 509                     E1000_FA_SYM_PAUSE | E1000_FA_ASYM_PAUSE);
 510         }
 511         if (sc->mii_model != MII_MODEL_MARVELL_E3082) {
 512                 PHY_WRITE(sc, E1000_1GCR,
 513                     E1000_1GCR_1000T_FD | E1000_1GCR_1000T);
 514         }
 515         PHY_WRITE(sc, E1000_CR,
 516             E1000_CR_AUTO_NEG_ENABLE | E1000_CR_RESTART_AUTO_NEG);
 517 }