sys/dev/netif/mii_layer/rgephy.c

   1 /*      $OpenBSD: rgephy.c,v 1.12 2006/06/27 05:36:58 brad Exp $        */
   2
   3 /*
   4  * Copyright (c) 2003
   5  *      Bill Paul <wpaul@windriver.com>.  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, this list of conditions and the following 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  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Bill Paul.
  18  * 4. Neither the name of the author nor the names of any co-contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
  26  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  32  * THE POSSIBILITY OF SUCH DAMAGE.
  33  *
  34  * $FreeBSD: src/sys/dev/mii/rgephy.c,v 1.7 2005/09/30 19:39:27 imp Exp $
  35  * $DragonFly: src/sys/dev/netif/mii_layer/rgephy.c,v 1.7 2008/07/22 10:59:16 sephe Exp $
  36  */
  37
  38 /*
  39  * Driver for the RealTek 8211B/8169S/8110S internal 10/100/1000 PHY.
  40  */
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/kernel.h>
  45 #include <sys/module.h>
  46 #include <sys/socket.h>
  47 #include <sys/bus.h>
  48
  49 #include <machine/clock.h>
  50
  51 #include <net/if.h>
  52 #include <net/if_arp.h>
  53 #include <net/if_media.h>
  54
  55 #include <dev/netif/mii_layer/mii.h>
  56 #include <dev/netif/mii_layer/miivar.h>
  57 #include <dev/netif/mii_layer/miidevs.h>
  58
  59 #include <dev/netif/re/if_rereg.h>
  60 #include <dev/netif/mii_layer/rgephyreg.h>
  61
  62 #include "miibus_if.h"
  63
  64 static int rgephy_probe(device_t);
  65 static int rgephy_attach(device_t);
  66
  67 static device_method_t rgephy_methods[] = {
  68         /* device interface */
  69         DEVMETHOD(device_probe,         rgephy_probe),
  70         DEVMETHOD(device_attach,        rgephy_attach),
  71         DEVMETHOD(device_detach,        ukphy_detach),
  72         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  73         { 0, 0 }
  74 };
  75
  76 static const struct mii_phydesc rgephys[] = {
  77         MII_PHYDESC(REALTEK2,   RTL8169S),
  78         MII_PHYDESC(xxREALTEK,  RTL8169S),
  79         MII_PHYDESC_NULL
  80 };
  81
  82 static devclass_t rgephy_devclass;
  83
  84 static driver_t rgephy_driver = {
  85         "rgephy",
  86         rgephy_methods,
  87         sizeof(struct mii_softc)
  88 };
  89
  90 DRIVER_MODULE(rgephy, miibus, rgephy_driver, rgephy_devclass, 0, 0);
  91
  92 static int      rgephy_service(struct mii_softc *, struct mii_data *, int);
  93 static void     rgephy_status(struct mii_softc *);
  94 static int      rgephy_mii_phy_auto(struct mii_softc *);
  95 static void     rgephy_reset(struct mii_softc *);
  96 static void     rgephy_loop(struct mii_softc *);
  97 static void     rgephy_load_dspcode(struct mii_softc *);
  98
  99 static int
 100 rgephy_probe(device_t dev)
 101 {
 102         struct mii_attach_args *ma = device_get_ivars(dev);
 103         const struct mii_phydesc *mpd;
 104
 105         mpd = mii_phy_match(ma, rgephys);
 106         if (mpd != NULL) {
 107                 device_set_desc(dev, mpd->mpd_name);
 108                 if (bootverbose)
 109                         device_printf(dev, "rev: %d\n", MII_REV(ma->mii_id2));
 110                 return (0);
 111         }
 112         return(ENXIO);
 113 }
 114
 115 static int
 116 rgephy_attach(device_t dev)
 117 {
 118         struct mii_softc *sc;
 119         struct mii_attach_args *ma;
 120         struct mii_data *mii;
 121
 122         sc = device_get_softc(dev);
 123         ma = device_get_ivars(dev);
 124         mii_softc_init(sc, ma);
 125         sc->mii_dev = device_get_parent(dev);
 126
 127         mii = device_get_softc(sc->mii_dev);
 128         LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
 129
 130         sc->mii_inst = mii->mii_instance;
 131         sc->mii_service = rgephy_service;
 132         sc->mii_reset = rgephy_reset;
 133         sc->mii_pdata = mii;
 134
 135         sc->mii_flags |= MIIF_NOISOLATE;
 136         mii->mii_instance++;
 137
 138         rgephy_reset(sc);
 139
 140         sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
 141         if (sc->mii_capabilities & BMSR_EXTSTAT)
 142                 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
 143
 144         device_printf(dev, " ");
 145         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0 &&
 146             (sc->mii_extcapabilities & EXTSR_MEDIAMASK) == 0)
 147                 kprintf("no media present");
 148         else
 149                 mii_phy_add_media(sc);
 150         kprintf("\n");
 151
 152         MIIBUS_MEDIAINIT(sc->mii_dev);
 153         return(0);
 154 }
 155
 156 static int
 157 rgephy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 158 {
 159         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
 160         int reg, speed, gig;
 161         uint16_t id2;
 162
 163         switch (cmd) {
 164         case MII_POLLSTAT:
 165                 /*
 166                  * If we're not polling our PHY instance, just return.
 167                  */
 168                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 169                         return (0);
 170                 break;
 171
 172         case MII_MEDIACHG:
 173                 /*
 174                  * If the media indicates a different PHY instance,
 175                  * isolate ourselves.
 176                  */
 177                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
 178                         reg = PHY_READ(sc, MII_BMCR);
 179                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
 180                         return (0);
 181                 }
 182
 183                 /*
 184                  * If the interface is not up, don't do anything.
 185                  */
 186                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 187                         break;
 188
 189                 rgephy_reset(sc);       /* XXX hardware bug work-around */
 190
 191                 switch (IFM_SUBTYPE(ife->ifm_media)) {
 192                 case IFM_AUTO:
 193 #ifdef foo
 194                         /*
 195                          * If we're already in auto mode, just return.
 196                          */
 197                         if (PHY_READ(sc, RGEPHY_MII_BMCR) & RGEPHY_BMCR_AUTOEN)
 198                                 return (0);
 199 #endif
 200                         rgephy_mii_phy_auto(sc);
 201                         break;
 202                 case IFM_1000_T:
 203                         speed = RGEPHY_S1000;
 204                         goto setit;
 205                 case IFM_100_TX:
 206                         speed = RGEPHY_S100;
 207                         goto setit;
 208                 case IFM_10_T:
 209                         speed = RGEPHY_S10;
 210 setit:
 211                         rgephy_loop(sc);
 212                         if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
 213                                 speed |= RGEPHY_BMCR_FDX;
 214                                 gig = RGEPHY_1000CTL_AFD;
 215                         } else {
 216                                 gig = RGEPHY_1000CTL_AHD;
 217                         }
 218
 219                         PHY_WRITE(sc, RGEPHY_MII_1000CTL, 0);
 220                         PHY_WRITE(sc, RGEPHY_MII_BMCR, speed);
 221                         PHY_WRITE(sc, RGEPHY_MII_ANAR, RGEPHY_SEL_TYPE);
 222
 223                         if (IFM_SUBTYPE(ife->ifm_media) != IFM_1000_T)
 224                                 break;
 225
 226                         PHY_WRITE(sc, RGEPHY_MII_1000CTL, gig);
 227                         PHY_WRITE(sc, RGEPHY_MII_BMCR,
 228                             speed|RGEPHY_BMCR_AUTOEN|RGEPHY_BMCR_STARTNEG);
 229
 230                         /*
 231                          * When settning the link manually, one side must
 232                          * be the master and the other the slave. However
 233                          * ifmedia doesn't give us a good way to specify
 234                          * this, so we fake it by using one of the LINK
 235                          * flags. If LINK0 is set, we program the PHY to
 236                          * be a master, otherwise it's a slave.
 237                          */
 238                         if ((mii->mii_ifp->if_flags & IFF_LINK0)) {
 239                                 PHY_WRITE(sc, RGEPHY_MII_1000CTL,
 240                                     gig|RGEPHY_1000CTL_MSE|RGEPHY_1000CTL_MSC);
 241                         } else {
 242                                 PHY_WRITE(sc, RGEPHY_MII_1000CTL,
 243                                     gig|RGEPHY_1000CTL_MSE);
 244                         }
 245                         break;
 246 #ifdef foo
 247                 case IFM_NONE:
 248                         PHY_WRITE(sc, MII_BMCR, BMCR_ISO|BMCR_PDOWN);
 249                         break;
 250 #endif
 251                 case IFM_100_T4:
 252                 default:
 253                         return (EINVAL);
 254                 }
 255                 break;
 256
 257         case MII_TICK:
 258                 /*
 259                  * If we're not currently selected, just return.
 260                  */
 261                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
 262                         return (0);
 263
 264                 /*
 265                  * Is the interface even up?
 266                  */
 267                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
 268                         return (0);
 269
 270                 /*
 271                  * Only used for autonegotiation.
 272                  */
 273                 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
 274                         break;
 275
 276                 /*
 277                  * Check to see if we have link.  If we do, we don't
 278                  * need to restart the autonegotiation process.
 279                  *
 280                  * XXX Read the BMSR twice in case it's latched?
 281                  */
 282                 id2 = PHY_READ(sc, MII_PHYIDR2);
 283
 284                 if (MII_REV(id2) < 2) {
 285                         reg = PHY_READ(sc, RE_GMEDIASTAT);
 286                         if (reg & RE_GMEDIASTAT_LINK) {
 287                                 sc->mii_ticks = 0;
 288                                 break;
 289                         }
 290                 } else {
 291                         reg = PHY_READ(sc, RGEPHY_SR);
 292                         if (reg & RGEPHY_SR_LINK) {
 293                                 sc->mii_ticks = 0;
 294                                 break;
 295                         }
 296                 }
 297
 298                 /*
 299                  * Only retry autonegotiation every mii_anegticks seconds.
 300                  */
 301                 if (++sc->mii_ticks <= sc->mii_anegticks)
 302                         break;
 303
 304                 sc->mii_ticks = 0;
 305
 306                 /*
 307                  * Although rgephy_mii_phy_auto() always returns EJUSTRETURN,
 308                  * we should not rely on that.
 309                  */
 310                 if (rgephy_mii_phy_auto(sc) == EJUSTRETURN)
 311                         return (0);
 312                 break;
 313         }
 314
 315         /* Update the media status. */
 316         rgephy_status(sc);
 317
 318         /*
 319          * Callback if something changed. Note that we need to poke
 320          * the DSP on the RealTek PHYs if the media changes.
 321          */
 322         if (sc->mii_media_active != mii->mii_media_active ||
 323             sc->mii_media_status != mii->mii_media_status ||
 324             cmd == MII_MEDIACHG)
 325                 rgephy_load_dspcode(sc);
 326         mii_phy_update(sc, cmd);
 327         return (0);
 328 }
 329
 330 static void
 331 rgephy_status(struct mii_softc *sc)
 332 {
 333         struct mii_data *mii = sc->mii_pdata;
 334         int bmsr, bmcr;
 335         uint16_t id2;
 336
 337         mii->mii_media_status = IFM_AVALID;
 338         mii->mii_media_active = IFM_ETHER;
 339
 340         id2 = PHY_READ(sc, MII_PHYIDR2);
 341
 342         if (MII_REV(id2) < 2) {
 343                 bmsr = PHY_READ(sc, RE_GMEDIASTAT);
 344                 if (bmsr & RE_GMEDIASTAT_LINK)
 345                         mii->mii_media_status |= IFM_ACTIVE;
 346         } else {
 347                 bmsr = PHY_READ(sc, RGEPHY_SR);
 348                 if (bmsr & RGEPHY_SR_LINK)
 349                         mii->mii_media_status |= IFM_ACTIVE;
 350         }
 351
 352         bmsr = PHY_READ(sc, RGEPHY_MII_BMSR);
 353
 354         bmcr = PHY_READ(sc, RGEPHY_MII_BMCR);
 355
 356         if (bmcr & RGEPHY_BMCR_LOOP)
 357                 mii->mii_media_active |= IFM_LOOP;
 358
 359         if (bmcr & RGEPHY_BMCR_AUTOEN) {
 360                 if ((bmsr & RGEPHY_BMSR_ACOMP) == 0) {
 361                         /* Erg, still trying, I guess... */
 362                         mii->mii_media_active |= IFM_NONE;
 363                         return;
 364                 }
 365         }
 366
 367         if (MII_REV(id2) < 2) {
 368                 bmsr = PHY_READ(sc, RE_GMEDIASTAT);
 369                 if (bmsr & RE_GMEDIASTAT_1000MBPS)
 370                         mii->mii_media_active |= IFM_1000_T;
 371                 else if (bmsr & RE_GMEDIASTAT_100MBPS)
 372                         mii->mii_media_active |= IFM_100_TX;
 373                 else if (bmsr & RE_GMEDIASTAT_10MBPS)
 374                         mii->mii_media_active |= IFM_10_T;
 375                 else
 376                         mii->mii_media_active |= IFM_NONE;
 377                 if (bmsr & RE_GMEDIASTAT_FDX)
 378                         mii->mii_media_active |= IFM_FDX;
 379         } else {
 380                 bmsr = PHY_READ(sc, RGEPHY_SR);
 381                 if (RGEPHY_SR_SPEED(bmsr) == 2)
 382                         mii->mii_media_active |= IFM_1000_T;
 383                 else if (RGEPHY_SR_SPEED(bmsr) == 1)
 384                         mii->mii_media_active |= IFM_100_TX;
 385                 else if (RGEPHY_SR_SPEED(bmsr) == 0)
 386                         mii->mii_media_active |= IFM_10_T;
 387                 else
 388                         mii->mii_media_active |= IFM_NONE;
 389                 if (bmsr & RGEPHY_SR_FDX)
 390                         mii->mii_media_active |= IFM_FDX;
 391         }
 392 }
 393
 394 static int
 395 rgephy_mii_phy_auto(struct mii_softc *sc)
 396 {
 397         uint16_t id2;
 398
 399         id2 = PHY_READ(sc, MII_PHYIDR2);
 400         if (MII_REV(id2) < 2) {
 401                 rgephy_loop(sc);
 402                 rgephy_reset(sc);
 403         }
 404
 405         PHY_WRITE(sc, RGEPHY_MII_ANAR,
 406                   BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA);
 407         DELAY(1000);
 408         PHY_WRITE(sc, RGEPHY_MII_1000CTL,
 409             RGEPHY_1000CTL_AHD | RGEPHY_1000CTL_AFD);
 410         DELAY(1000);
 411         PHY_WRITE(sc, RGEPHY_MII_BMCR,
 412             RGEPHY_BMCR_AUTOEN | RGEPHY_BMCR_STARTNEG);
 413         DELAY(100);
 414
 415         return (EJUSTRETURN);
 416 }
 417
 418 static void
 419 rgephy_loop(struct mii_softc *sc)
 420 {
 421         uint32_t bmsr;
 422         int i;
 423         uint16_t id2;
 424
 425         id2 = PHY_READ(sc, MII_PHYIDR2);
 426         if (MII_REV(id2) < 2) {
 427                 PHY_WRITE(sc, RGEPHY_MII_BMCR, RGEPHY_BMCR_PDOWN);
 428                 DELAY(1000);
 429         }
 430
 431         for (i = 0; i < 15000; i++) {
 432                 bmsr = PHY_READ(sc, RGEPHY_MII_BMSR);
 433                 if (!(bmsr & RGEPHY_BMSR_LINK)) {
 434 #if 0
 435                         device_printf(sc->mii_dev, "looped %d\n", i);
 436 #endif
 437                         break;
 438                 }
 439                 DELAY(10);
 440         }
 441 }
 442
 443 #define PHY_SETBIT(x, y, z) \
 444         PHY_WRITE(x, y, (PHY_READ(x, y) | (z)))
 445 #define PHY_CLRBIT(x, y, z) \
 446         PHY_WRITE(x, y, (PHY_READ(x, y) & ~(z)))
 447
 448 /*
 449  * Initialize RealTek PHY per the datasheet. The DSP in the PHYs of
 450  * existing revisions of the 8169S/8110S chips need to be tuned in
 451  * order to reliably negotiate a 1000Mbps link. This is only needed
 452  * for rev 0 and rev 1 of the PHY. Later versions work without
 453  * any fixups.
 454  */
 455 static void
 456 rgephy_load_dspcode(struct mii_softc *sc)
 457 {
 458         int val;
 459
 460         if (sc->mii_rev > 1)
 461                 return;
 462
 463         PHY_WRITE(sc, 31, 0x0001);
 464         PHY_WRITE(sc, 21, 0x1000);
 465         PHY_WRITE(sc, 24, 0x65C7);
 466         PHY_CLRBIT(sc, 4, 0x0800);
 467         val = PHY_READ(sc, 4) & 0xFFF;
 468         PHY_WRITE(sc, 4, val);
 469         PHY_WRITE(sc, 3, 0x00A1);
 470         PHY_WRITE(sc, 2, 0x0008);
 471         PHY_WRITE(sc, 1, 0x1020);
 472         PHY_WRITE(sc, 0, 0x1000);
 473         PHY_SETBIT(sc, 4, 0x0800);
 474         PHY_CLRBIT(sc, 4, 0x0800);
 475         val = (PHY_READ(sc, 4) & 0xFFF) | 0x7000;
 476         PHY_WRITE(sc, 4, val);
 477         PHY_WRITE(sc, 3, 0xFF41);
 478         PHY_WRITE(sc, 2, 0xDE60);
 479         PHY_WRITE(sc, 1, 0x0140);
 480         PHY_WRITE(sc, 0, 0x0077);
 481         val = (PHY_READ(sc, 4) & 0xFFF) | 0xA000;
 482         PHY_WRITE(sc, 4, val);
 483         PHY_WRITE(sc, 3, 0xDF01);
 484         PHY_WRITE(sc, 2, 0xDF20);
 485         PHY_WRITE(sc, 1, 0xFF95);
 486         PHY_WRITE(sc, 0, 0xFA00);
 487         val = (PHY_READ(sc, 4) & 0xFFF) | 0xB000;
 488         PHY_WRITE(sc, 4, val);
 489         PHY_WRITE(sc, 3, 0xFF41);
 490         PHY_WRITE(sc, 2, 0xDE20);
 491         PHY_WRITE(sc, 1, 0x0140);
 492         PHY_WRITE(sc, 0, 0x00BB);
 493         val = (PHY_READ(sc, 4) & 0xFFF) | 0xF000;
 494         PHY_WRITE(sc, 4, val);
 495         PHY_WRITE(sc, 3, 0xDF01);
 496         PHY_WRITE(sc, 2, 0xDF20);
 497         PHY_WRITE(sc, 1, 0xFF95);
 498         PHY_WRITE(sc, 0, 0xBF00);
 499         PHY_SETBIT(sc, 4, 0x0800);
 500         PHY_CLRBIT(sc, 4, 0x0800);
 501         PHY_WRITE(sc, 31, 0x0000);
 502
 503         DELAY(40);
 504 }
 505
 506 static void
 507 rgephy_reset(struct mii_softc *sc)
 508 {
 509         uint16_t id2;
 510
 511         mii_phy_reset(sc);
 512
 513         id2 = PHY_READ(sc, MII_PHYIDR2);
 514         if (MII_REV(id2) < 2) {
 515                 DELAY(1000);
 516                 PHY_WRITE(sc, RGEPHY_MII_BMCR, RGEPHY_BMCR_AUTOEN);
 517                 DELAY(1000);
 518         }
 519         rgephy_load_dspcode(sc);
 520 }