drivers/net/phy/phy.c

   1 /*
   2  * Generic PHY Management code
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  *
   6  * Copyright 2011 Freescale Semiconductor, Inc.
   7  * author Andy Fleming
   8  *
   9  * Based loosely off of Linux's PHY Lib
  10  */
  11
  12 #include <config.h>
  13 #include <common.h>
  14 #include <malloc.h>
  15 #include <net.h>
  16 #include <command.h>
  17 #include <miiphy.h>
  18 #include <phy.h>
  19 #include <errno.h>
  20 #include <linux/err.h>
  21
  22 /* Generic PHY support and helper functions */
  23
  24 /**
  25  * genphy_config_advert - sanitize and advertise auto-negotation parameters
  26  * @phydev: target phy_device struct
  27  *
  28  * Description: Writes MII_ADVERTISE with the appropriate values,
  29  *   after sanitizing the values to make sure we only advertise
  30  *   what is supported.  Returns < 0 on error, 0 if the PHY's advertisement
  31  *   hasn't changed, and > 0 if it has changed.
  32  */
  33 static int genphy_config_advert(struct phy_device *phydev)
  34 {
  35         u32 advertise;
  36         int oldadv, adv;
  37         int err, changed = 0;
  38
  39         /* Only allow advertising what
  40          * this PHY supports */
  41         phydev->advertising &= phydev->supported;
  42         advertise = phydev->advertising;
  43
  44         /* Setup standard advertisement */
  45         oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
  46
  47         if (adv < 0)
  48                 return adv;
  49
  50         adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
  51                  ADVERTISE_PAUSE_ASYM);
  52         if (advertise & ADVERTISED_10baseT_Half)
  53                 adv |= ADVERTISE_10HALF;
  54         if (advertise & ADVERTISED_10baseT_Full)
  55                 adv |= ADVERTISE_10FULL;
  56         if (advertise & ADVERTISED_100baseT_Half)
  57                 adv |= ADVERTISE_100HALF;
  58         if (advertise & ADVERTISED_100baseT_Full)
  59                 adv |= ADVERTISE_100FULL;
  60         if (advertise & ADVERTISED_Pause)
  61                 adv |= ADVERTISE_PAUSE_CAP;
  62         if (advertise & ADVERTISED_Asym_Pause)
  63                 adv |= ADVERTISE_PAUSE_ASYM;
  64         if (advertise & ADVERTISED_1000baseX_Half)
  65                 adv |= ADVERTISE_1000XHALF;
  66         if (advertise & ADVERTISED_1000baseX_Full)
  67                 adv |= ADVERTISE_1000XFULL;
  68
  69         if (adv != oldadv) {
  70                 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
  71
  72                 if (err < 0)
  73                         return err;
  74                 changed = 1;
  75         }
  76
  77         /* Configure gigabit if it's supported */
  78         if (phydev->supported & (SUPPORTED_1000baseT_Half |
  79                                 SUPPORTED_1000baseT_Full)) {
  80                 oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
  81
  82                 if (adv < 0)
  83                         return adv;
  84
  85                 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
  86                 if (advertise & SUPPORTED_1000baseT_Half)
  87                         adv |= ADVERTISE_1000HALF;
  88                 if (advertise & SUPPORTED_1000baseT_Full)
  89                         adv |= ADVERTISE_1000FULL;
  90
  91                 if (adv != oldadv) {
  92                         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000,
  93                                         adv);
  94
  95                         if (err < 0)
  96                                 return err;
  97                         changed = 1;
  98                 }
  99         }
 100
 101         return changed;
 102 }
 103
 104
 105 /**
 106  * genphy_setup_forced - configures/forces speed/duplex from @phydev
 107  * @phydev: target phy_device struct
 108  *
 109  * Description: Configures MII_BMCR to force speed/duplex
 110  *   to the values in phydev. Assumes that the values are valid.
 111  */
 112 static int genphy_setup_forced(struct phy_device *phydev)
 113 {
 114         int err;
 115         int ctl = 0;
 116
 117         phydev->pause = phydev->asym_pause = 0;
 118
 119         if (SPEED_1000 == phydev->speed)
 120                 ctl |= BMCR_SPEED1000;
 121         else if (SPEED_100 == phydev->speed)
 122                 ctl |= BMCR_SPEED100;
 123
 124         if (DUPLEX_FULL == phydev->duplex)
 125                 ctl |= BMCR_FULLDPLX;
 126
 127         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 128
 129         return err;
 130 }
 131
 132
 133 /**
 134  * genphy_restart_aneg - Enable and Restart Autonegotiation
 135  * @phydev: target phy_device struct
 136  */
 137 int genphy_restart_aneg(struct phy_device *phydev)
 138 {
 139         int ctl;
 140
 141         ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 142
 143         if (ctl < 0)
 144                 return ctl;
 145
 146         ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
 147
 148         /* Don't isolate the PHY if we're negotiating */
 149         ctl &= ~(BMCR_ISOLATE);
 150
 151         ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 152
 153         return ctl;
 154 }
 155
 156
 157 /**
 158  * genphy_config_aneg - restart auto-negotiation or write BMCR
 159  * @phydev: target phy_device struct
 160  *
 161  * Description: If auto-negotiation is enabled, we configure the
 162  *   advertising, and then restart auto-negotiation.  If it is not
 163  *   enabled, then we write the BMCR.
 164  */
 165 int genphy_config_aneg(struct phy_device *phydev)
 166 {
 167         int result;
 168
 169         if (AUTONEG_ENABLE != phydev->autoneg)
 170                 return genphy_setup_forced(phydev);
 171
 172         result = genphy_config_advert(phydev);
 173
 174         if (result < 0) /* error */
 175                 return result;
 176
 177         if (result == 0) {
 178                 /* Advertisment hasn't changed, but maybe aneg was never on to
 179                  * begin with?  Or maybe phy was isolated? */
 180                 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 181
 182                 if (ctl < 0)
 183                         return ctl;
 184
 185                 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
 186                         result = 1; /* do restart aneg */
 187         }
 188
 189         /* Only restart aneg if we are advertising something different
 190          * than we were before.  */
 191         if (result > 0)
 192                 result = genphy_restart_aneg(phydev);
 193
 194         return result;
 195 }
 196
 197 /**
 198  * genphy_update_link - update link status in @phydev
 199  * @phydev: target phy_device struct
 200  *
 201  * Description: Update the value in phydev->link to reflect the
 202  *   current link value.  In order to do this, we need to read
 203  *   the status register twice, keeping the second value.
 204  */
 205 int genphy_update_link(struct phy_device *phydev)
 206 {
 207         unsigned int mii_reg;
 208
 209         /*
 210          * Wait if the link is up, and autonegotiation is in progress
 211          * (ie - we're capable and it's not done)
 212          */
 213         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 214
 215         /*
 216          * If we already saw the link up, and it hasn't gone down, then
 217          * we don't need to wait for autoneg again
 218          */
 219         if (phydev->link && mii_reg & BMSR_LSTATUS)
 220                 return 0;
 221
 222         if ((mii_reg & BMSR_ANEGCAPABLE) && !(mii_reg & BMSR_ANEGCOMPLETE)) {
 223                 int i = 0;
 224
 225                 printf("%s Waiting for PHY auto negotiation to complete",
 226                         phydev->dev->name);
 227                 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
 228                         /*
 229                          * Timeout reached ?
 230                          */
 231                         if (i > PHY_ANEG_TIMEOUT) {
 232                                 printf(" TIMEOUT !\n");
 233                                 phydev->link = 0;
 234                                 return 0;
 235                         }
 236
 237                         if (ctrlc()) {
 238                                 puts("user interrupt!\n");
 239                                 phydev->link = 0;
 240                                 return -EINTR;
 241                         }
 242
 243                         if ((i++ % 500) == 0)
 244                                 printf(".");
 245
 246                         udelay(1000);   /* 1 ms */
 247                         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 248                 }
 249                 printf(" done\n");
 250                 phydev->link = 1;
 251         } else {
 252                 /* Read the link a second time to clear the latched state */
 253                 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 254
 255                 if (mii_reg & BMSR_LSTATUS)
 256                         phydev->link = 1;
 257                 else
 258                         phydev->link = 0;
 259         }
 260
 261         return 0;
 262 }
 263
 264 /*
 265  * Generic function which updates the speed and duplex.  If
 266  * autonegotiation is enabled, it uses the AND of the link
 267  * partner's advertised capabilities and our advertised
 268  * capabilities.  If autonegotiation is disabled, we use the
 269  * appropriate bits in the control register.
 270  *
 271  * Stolen from Linux's mii.c and phy_device.c
 272  */
 273 int genphy_parse_link(struct phy_device *phydev)
 274 {
 275         int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 276
 277         /* We're using autonegotiation */
 278         if (phydev->supported & SUPPORTED_Autoneg) {
 279                 u32 lpa = 0;
 280                 int gblpa = 0;
 281                 u32 estatus = 0;
 282
 283                 /* Check for gigabit capability */
 284                 if (phydev->supported & (SUPPORTED_1000baseT_Full |
 285                                         SUPPORTED_1000baseT_Half)) {
 286                         /* We want a list of states supported by
 287                          * both PHYs in the link
 288                          */
 289                         gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
 290                         if (gblpa < 0) {
 291                                 debug("Could not read MII_STAT1000. Ignoring gigabit capability\n");
 292                                 gblpa = 0;
 293                         }
 294                         gblpa &= phy_read(phydev,
 295                                         MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
 296                 }
 297
 298                 /* Set the baseline so we only have to set them
 299                  * if they're different
 300                  */
 301                 phydev->speed = SPEED_10;
 302                 phydev->duplex = DUPLEX_HALF;
 303
 304                 /* Check the gigabit fields */
 305                 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
 306                         phydev->speed = SPEED_1000;
 307
 308                         if (gblpa & PHY_1000BTSR_1000FD)
 309                                 phydev->duplex = DUPLEX_FULL;
 310
 311                         /* We're done! */
 312                         return 0;
 313                 }
 314
 315                 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
 316                 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
 317
 318                 if (lpa & (LPA_100FULL | LPA_100HALF)) {
 319                         phydev->speed = SPEED_100;
 320
 321                         if (lpa & LPA_100FULL)
 322                                 phydev->duplex = DUPLEX_FULL;
 323
 324                 } else if (lpa & LPA_10FULL)
 325                         phydev->duplex = DUPLEX_FULL;
 326
 327                 /*
 328                  * Extended status may indicate that the PHY supports
 329                  * 1000BASE-T/X even though the 1000BASE-T registers
 330                  * are missing. In this case we can't tell whether the
 331                  * peer also supports it, so we only check extended
 332                  * status if the 1000BASE-T registers are actually
 333                  * missing.
 334                  */
 335                 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
 336                         estatus = phy_read(phydev, MDIO_DEVAD_NONE,
 337                                            MII_ESTATUS);
 338
 339                 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
 340                                 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
 341                         phydev->speed = SPEED_1000;
 342                         if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
 343                                 phydev->duplex = DUPLEX_FULL;
 344                 }
 345
 346         } else {
 347                 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 348
 349                 phydev->speed = SPEED_10;
 350                 phydev->duplex = DUPLEX_HALF;
 351
 352                 if (bmcr & BMCR_FULLDPLX)
 353                         phydev->duplex = DUPLEX_FULL;
 354
 355                 if (bmcr & BMCR_SPEED1000)
 356                         phydev->speed = SPEED_1000;
 357                 else if (bmcr & BMCR_SPEED100)
 358                         phydev->speed = SPEED_100;
 359         }
 360
 361         return 0;
 362 }
 363
 364 int genphy_config(struct phy_device *phydev)
 365 {
 366         int val;
 367         u32 features;
 368
 369         /* For now, I'll claim that the generic driver supports
 370          * all possible port types */
 371         features = (SUPPORTED_TP | SUPPORTED_MII
 372                         | SUPPORTED_AUI | SUPPORTED_FIBRE |
 373                         SUPPORTED_BNC);
 374
 375         /* Do we support autonegotiation? */
 376         val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 377
 378         if (val < 0)
 379                 return val;
 380
 381         if (val & BMSR_ANEGCAPABLE)
 382                 features |= SUPPORTED_Autoneg;
 383
 384         if (val & BMSR_100FULL)
 385                 features |= SUPPORTED_100baseT_Full;
 386         if (val & BMSR_100HALF)
 387                 features |= SUPPORTED_100baseT_Half;
 388         if (val & BMSR_10FULL)
 389                 features |= SUPPORTED_10baseT_Full;
 390         if (val & BMSR_10HALF)
 391                 features |= SUPPORTED_10baseT_Half;
 392
 393         if (val & BMSR_ESTATEN) {
 394                 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
 395
 396                 if (val < 0)
 397                         return val;
 398
 399                 if (val & ESTATUS_1000_TFULL)
 400                         features |= SUPPORTED_1000baseT_Full;
 401                 if (val & ESTATUS_1000_THALF)
 402                         features |= SUPPORTED_1000baseT_Half;
 403                 if (val & ESTATUS_1000_XFULL)
 404                         features |= SUPPORTED_1000baseX_Full;
 405                 if (val & ESTATUS_1000_XHALF)
 406                         features |= SUPPORTED_1000baseX_Half;
 407         }
 408
 409         phydev->supported = features;
 410         phydev->advertising = features;
 411
 412         genphy_config_aneg(phydev);
 413
 414         return 0;
 415 }
 416
 417 int genphy_startup(struct phy_device *phydev)
 418 {
 419         genphy_update_link(phydev);
 420         genphy_parse_link(phydev);
 421
 422         return 0;
 423 }
 424
 425 int genphy_shutdown(struct phy_device *phydev)
 426 {
 427         return 0;
 428 }
 429
 430 static struct phy_driver genphy_driver = {
 431         .uid            = 0xffffffff,
 432         .mask           = 0xffffffff,
 433         .name           = "Generic PHY",
 434         .features       = 0,
 435         .config         = genphy_config,
 436         .startup        = genphy_startup,
 437         .shutdown       = genphy_shutdown,
 438 };
 439
 440 static LIST_HEAD(phy_drivers);
 441
 442 int phy_init(void)
 443 {
 444 #ifdef CONFIG_PHY_ATHEROS
 445         phy_atheros_init();
 446 #endif
 447 #ifdef CONFIG_PHY_BROADCOM
 448         phy_broadcom_init();
 449 #endif
 450 #ifdef CONFIG_PHY_DAVICOM
 451         phy_davicom_init();
 452 #endif
 453 #ifdef CONFIG_PHY_ET1011C
 454         phy_et1011c_init();
 455 #endif
 456 #ifdef CONFIG_PHY_ICPLUS
 457         phy_icplus_init();
 458 #endif
 459 #ifdef CONFIG_PHY_LXT
 460         phy_lxt_init();
 461 #endif
 462 #ifdef CONFIG_PHY_MARVELL
 463         phy_marvell_init();
 464 #endif
 465 #ifdef CONFIG_PHY_MICREL
 466         phy_micrel_init();
 467 #endif
 468 #ifdef CONFIG_PHY_NATSEMI
 469         phy_natsemi_init();
 470 #endif
 471 #ifdef CONFIG_PHY_REALTEK
 472         phy_realtek_init();
 473 #endif
 474 #ifdef CONFIG_PHY_SMSC
 475         phy_smsc_init();
 476 #endif
 477 #ifdef CONFIG_PHY_TERANETICS
 478         phy_teranetics_init();
 479 #endif
 480 #ifdef CONFIG_PHY_VITESSE
 481         phy_vitesse_init();
 482 #endif
 483
 484         return 0;
 485 }
 486
 487 int phy_register(struct phy_driver *drv)
 488 {
 489         INIT_LIST_HEAD(&drv->list);
 490         list_add_tail(&drv->list, &phy_drivers);
 491
 492         return 0;
 493 }
 494
 495 static int phy_probe(struct phy_device *phydev)
 496 {
 497         int err = 0;
 498
 499         phydev->advertising = phydev->supported = phydev->drv->features;
 500         phydev->mmds = phydev->drv->mmds;
 501
 502         if (phydev->drv->probe)
 503                 err = phydev->drv->probe(phydev);
 504
 505         return err;
 506 }
 507
 508 static struct phy_driver *generic_for_interface(phy_interface_t interface)
 509 {
 510 #ifdef CONFIG_PHYLIB_10G
 511         if (is_10g_interface(interface))
 512                 return &gen10g_driver;
 513 #endif
 514
 515         return &genphy_driver;
 516 }
 517
 518 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
 519                                 phy_interface_t interface)
 520 {
 521         struct list_head *entry;
 522         int phy_id = phydev->phy_id;
 523         struct phy_driver *drv = NULL;
 524
 525         list_for_each(entry, &phy_drivers) {
 526                 drv = list_entry(entry, struct phy_driver, list);
 527                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 528                         return drv;
 529         }
 530
 531         /* If we made it here, there's no driver for this PHY */
 532         return generic_for_interface(interface);
 533 }
 534
 535 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 536                                             int phy_id,
 537                                             phy_interface_t interface)
 538 {
 539         struct phy_device *dev;
 540
 541         /* We allocate the device, and initialize the
 542          * default values */
 543         dev = malloc(sizeof(*dev));
 544         if (!dev) {
 545                 printf("Failed to allocate PHY device for %s:%d\n",
 546                         bus->name, addr);
 547                 return NULL;
 548         }
 549
 550         memset(dev, 0, sizeof(*dev));
 551
 552         dev->duplex = -1;
 553         dev->link = 1;
 554         dev->interface = interface;
 555
 556         dev->autoneg = AUTONEG_ENABLE;
 557
 558         dev->addr = addr;
 559         dev->phy_id = phy_id;
 560         dev->bus = bus;
 561
 562         dev->drv = get_phy_driver(dev, interface);
 563
 564         phy_probe(dev);
 565
 566         bus->phymap[addr] = dev;
 567
 568         return dev;
 569 }
 570
 571 /**
 572  * get_phy_id - reads the specified addr for its ID.
 573  * @bus: the target MII bus
 574  * @addr: PHY address on the MII bus
 575  * @phy_id: where to store the ID retrieved.
 576  *
 577  * Description: Reads the ID registers of the PHY at @addr on the
 578  *   @bus, stores it in @phy_id and returns zero on success.
 579  */
 580 static int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 581 {
 582         int phy_reg;
 583
 584         /* Grab the bits from PHYIR1, and put them
 585          * in the upper half */
 586         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 587
 588         if (phy_reg < 0)
 589                 return -EIO;
 590
 591         *phy_id = (phy_reg & 0xffff) << 16;
 592
 593         /* Grab the bits from PHYIR2, and put them in the lower half */
 594         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 595
 596         if (phy_reg < 0)
 597                 return -EIO;
 598
 599         *phy_id |= (phy_reg & 0xffff);
 600
 601         return 0;
 602 }
 603
 604 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 605                 unsigned phy_mask, int devad, phy_interface_t interface)
 606 {
 607         u32 phy_id = 0xffffffff;
 608         while (phy_mask) {
 609                 int addr = ffs(phy_mask) - 1;
 610                 int r = get_phy_id(bus, addr, devad, &phy_id);
 611                 if (r < 0)
 612                         return ERR_PTR(r);
 613                 /* If the PHY ID is mostly f's, we didn't find anything */
 614                 if ((phy_id & 0x1fffffff) != 0x1fffffff)
 615                         return phy_device_create(bus, addr, phy_id, interface);
 616                 phy_mask &= ~(1 << addr);
 617         }
 618         return NULL;
 619 }
 620
 621 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 622                 unsigned phy_mask, phy_interface_t interface)
 623 {
 624         /* If we have one, return the existing device, with new interface */
 625         while (phy_mask) {
 626                 int addr = ffs(phy_mask) - 1;
 627                 if (bus->phymap[addr]) {
 628                         bus->phymap[addr]->interface = interface;
 629                         return bus->phymap[addr];
 630                 }
 631                 phy_mask &= ~(1 << addr);
 632         }
 633         return NULL;
 634 }
 635
 636 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 637                 unsigned phy_mask, phy_interface_t interface)
 638 {
 639         int i;
 640         struct phy_device *phydev;
 641
 642         phydev = search_for_existing_phy(bus, phy_mask, interface);
 643         if (phydev)
 644                 return phydev;
 645         /* Try Standard (ie Clause 22) access */
 646         /* Otherwise we have to try Clause 45 */
 647         for (i = 0; i < 5; i++) {
 648                 phydev = create_phy_by_mask(bus, phy_mask,
 649                                 i ? i : MDIO_DEVAD_NONE, interface);
 650                 if (IS_ERR(phydev))
 651                         return NULL;
 652                 if (phydev)
 653                         return phydev;
 654         }
 655         printf("Phy not found\n");
 656         return phy_device_create(bus, ffs(phy_mask) - 1, 0xffffffff, interface);
 657 }
 658
 659 /**
 660  * get_phy_device - reads the specified PHY device and returns its @phy_device struct
 661  * @bus: the target MII bus
 662  * @addr: PHY address on the MII bus
 663  *
 664  * Description: Reads the ID registers of the PHY at @addr on the
 665  *   @bus, then allocates and returns the phy_device to represent it.
 666  */
 667 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
 668                                          phy_interface_t interface)
 669 {
 670         return get_phy_device_by_mask(bus, 1 << addr, interface);
 671 }
 672
 673 int phy_reset(struct phy_device *phydev)
 674 {
 675         int reg;
 676         int timeout = 500;
 677         int devad = MDIO_DEVAD_NONE;
 678
 679 #ifdef CONFIG_PHYLIB_10G
 680         /* If it's 10G, we need to issue reset through one of the MMDs */
 681         if (is_10g_interface(phydev->interface)) {
 682                 if (!phydev->mmds)
 683                         gen10g_discover_mmds(phydev);
 684
 685                 devad = ffs(phydev->mmds) - 1;
 686         }
 687 #endif
 688
 689         reg = phy_read(phydev, devad, MII_BMCR);
 690         if (reg < 0) {
 691                 debug("PHY status read failed\n");
 692                 return -1;
 693         }
 694
 695         reg |= BMCR_RESET;
 696
 697         if (phy_write(phydev, devad, MII_BMCR, reg) < 0) {
 698                 debug("PHY reset failed\n");
 699                 return -1;
 700         }
 701
 702 #ifdef CONFIG_PHY_RESET_DELAY
 703         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 704 #endif
 705         /*
 706          * Poll the control register for the reset bit to go to 0 (it is
 707          * auto-clearing).  This should happen within 0.5 seconds per the
 708          * IEEE spec.
 709          */
 710         while ((reg & BMCR_RESET) && timeout--) {
 711                 reg = phy_read(phydev, devad, MII_BMCR);
 712
 713                 if (reg < 0) {
 714                         debug("PHY status read failed\n");
 715                         return -1;
 716                 }
 717                 udelay(1000);
 718         }
 719
 720         if (reg & BMCR_RESET) {
 721                 puts("PHY reset timed out\n");
 722                 return -1;
 723         }
 724
 725         return 0;
 726 }
 727
 728 int miiphy_reset(const char *devname, unsigned char addr)
 729 {
 730         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 731         struct phy_device *phydev;
 732
 733         /*
 734          * miiphy_reset was only used on standard PHYs, so we'll fake it here.
 735          * If later code tries to connect with the right interface, this will
 736          * be corrected by get_phy_device in phy_connect()
 737          */
 738         phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
 739
 740         return phy_reset(phydev);
 741 }
 742
 743 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
 744                 phy_interface_t interface)
 745 {
 746         /* Reset the bus */
 747         if (bus->reset)
 748                 bus->reset(bus);
 749
 750         /* Wait 15ms to make sure the PHY has come out of hard reset */
 751         udelay(15000);
 752         return get_phy_device_by_mask(bus, phy_mask, interface);
 753 }
 754
 755 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
 756 {
 757         /* Soft Reset the PHY */
 758         phy_reset(phydev);
 759         if (phydev->dev) {
 760                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 761                                 phydev->bus->name, phydev->addr,
 762                                 phydev->dev->name, dev->name);
 763         }
 764         phydev->dev = dev;
 765         debug("%s connected to %s\n", dev->name, phydev->drv->name);
 766 }
 767
 768 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 769                 struct eth_device *dev, phy_interface_t interface)
 770 {
 771         struct phy_device *phydev;
 772
 773         phydev = phy_find_by_mask(bus, 1 << addr, interface);
 774         if (phydev)
 775                 phy_connect_dev(phydev, dev);
 776         else
 777                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
 778         return phydev;
 779 }
 780
 781 /*
 782  * Start the PHY.  Returns 0 on success, or a negative error code.
 783  */
 784 int phy_startup(struct phy_device *phydev)
 785 {
 786         if (phydev->drv->startup)
 787                 return phydev->drv->startup(phydev);
 788
 789         return 0;
 790 }
 791
 792 static int __board_phy_config(struct phy_device *phydev)
 793 {
 794         if (phydev->drv->config)
 795                 return phydev->drv->config(phydev);
 796         return 0;
 797 }
 798
 799 int board_phy_config(struct phy_device *phydev)
 800         __attribute__((weak, alias("__board_phy_config")));
 801
 802 int phy_config(struct phy_device *phydev)
 803 {
 804         /* Invoke an optional board-specific helper */
 805         board_phy_config(phydev);
 806
 807         return 0;
 808 }
 809
 810 int phy_shutdown(struct phy_device *phydev)
 811 {
 812         if (phydev->drv->shutdown)
 813                 phydev->drv->shutdown(phydev);
 814
 815         return 0;
 816 }