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 <console.h>
  15 #include <dm.h>
  16 #include <malloc.h>
  17 #include <net.h>
  18 #include <command.h>
  19 #include <miiphy.h>
  20 #include <phy.h>
  21 #include <errno.h>
  22 #include <linux/err.h>
  23 #include <linux/compiler.h>
  24
  25 DECLARE_GLOBAL_DATA_PTR;
  26
  27 /* Generic PHY support and helper functions */
  28
  29 /**
  30  * genphy_config_advert - sanitize and advertise auto-negotation parameters
  31  * @phydev: target phy_device struct
  32  *
  33  * Description: Writes MII_ADVERTISE with the appropriate values,
  34  *   after sanitizing the values to make sure we only advertise
  35  *   what is supported.  Returns < 0 on error, 0 if the PHY's advertisement
  36  *   hasn't changed, and > 0 if it has changed.
  37  */
  38 static int genphy_config_advert(struct phy_device *phydev)
  39 {
  40         u32 advertise;
  41         int oldadv, adv;
  42         int err, changed = 0;
  43
  44         /* Only allow advertising what
  45          * this PHY supports */
  46         phydev->advertising &= phydev->supported;
  47         advertise = phydev->advertising;
  48
  49         /* Setup standard advertisement */
  50         oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
  51
  52         if (adv < 0)
  53                 return adv;
  54
  55         adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
  56                  ADVERTISE_PAUSE_ASYM);
  57         if (advertise & ADVERTISED_10baseT_Half)
  58                 adv |= ADVERTISE_10HALF;
  59         if (advertise & ADVERTISED_10baseT_Full)
  60                 adv |= ADVERTISE_10FULL;
  61         if (advertise & ADVERTISED_100baseT_Half)
  62                 adv |= ADVERTISE_100HALF;
  63         if (advertise & ADVERTISED_100baseT_Full)
  64                 adv |= ADVERTISE_100FULL;
  65         if (advertise & ADVERTISED_Pause)
  66                 adv |= ADVERTISE_PAUSE_CAP;
  67         if (advertise & ADVERTISED_Asym_Pause)
  68                 adv |= ADVERTISE_PAUSE_ASYM;
  69         if (advertise & ADVERTISED_1000baseX_Half)
  70                 adv |= ADVERTISE_1000XHALF;
  71         if (advertise & ADVERTISED_1000baseX_Full)
  72                 adv |= ADVERTISE_1000XFULL;
  73
  74         if (adv != oldadv) {
  75                 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
  76
  77                 if (err < 0)
  78                         return err;
  79                 changed = 1;
  80         }
  81
  82         /* Configure gigabit if it's supported */
  83         if (phydev->supported & (SUPPORTED_1000baseT_Half |
  84                                 SUPPORTED_1000baseT_Full)) {
  85                 oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
  86
  87                 if (adv < 0)
  88                         return adv;
  89
  90                 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
  91                 if (advertise & SUPPORTED_1000baseT_Half)
  92                         adv |= ADVERTISE_1000HALF;
  93                 if (advertise & SUPPORTED_1000baseT_Full)
  94                         adv |= ADVERTISE_1000FULL;
  95
  96                 if (adv != oldadv) {
  97                         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000,
  98                                         adv);
  99
 100                         if (err < 0)
 101                                 return err;
 102                         changed = 1;
 103                 }
 104         }
 105
 106         return changed;
 107 }
 108
 109
 110 /**
 111  * genphy_setup_forced - configures/forces speed/duplex from @phydev
 112  * @phydev: target phy_device struct
 113  *
 114  * Description: Configures MII_BMCR to force speed/duplex
 115  *   to the values in phydev. Assumes that the values are valid.
 116  */
 117 static int genphy_setup_forced(struct phy_device *phydev)
 118 {
 119         int err;
 120         int ctl = 0;
 121
 122         phydev->pause = phydev->asym_pause = 0;
 123
 124         if (SPEED_1000 == phydev->speed)
 125                 ctl |= BMCR_SPEED1000;
 126         else if (SPEED_100 == phydev->speed)
 127                 ctl |= BMCR_SPEED100;
 128
 129         if (DUPLEX_FULL == phydev->duplex)
 130                 ctl |= BMCR_FULLDPLX;
 131
 132         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 133
 134         return err;
 135 }
 136
 137
 138 /**
 139  * genphy_restart_aneg - Enable and Restart Autonegotiation
 140  * @phydev: target phy_device struct
 141  */
 142 int genphy_restart_aneg(struct phy_device *phydev)
 143 {
 144         int ctl;
 145
 146         ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 147
 148         if (ctl < 0)
 149                 return ctl;
 150
 151         ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
 152
 153         /* Don't isolate the PHY if we're negotiating */
 154         ctl &= ~(BMCR_ISOLATE);
 155
 156         ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 157
 158         return ctl;
 159 }
 160
 161
 162 /**
 163  * genphy_config_aneg - restart auto-negotiation or write BMCR
 164  * @phydev: target phy_device struct
 165  *
 166  * Description: If auto-negotiation is enabled, we configure the
 167  *   advertising, and then restart auto-negotiation.  If it is not
 168  *   enabled, then we write the BMCR.
 169  */
 170 int genphy_config_aneg(struct phy_device *phydev)
 171 {
 172         int result;
 173
 174         if (AUTONEG_ENABLE != phydev->autoneg)
 175                 return genphy_setup_forced(phydev);
 176
 177         result = genphy_config_advert(phydev);
 178
 179         if (result < 0) /* error */
 180                 return result;
 181
 182         if (result == 0) {
 183                 /* Advertisment hasn't changed, but maybe aneg was never on to
 184                  * begin with?  Or maybe phy was isolated? */
 185                 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 186
 187                 if (ctl < 0)
 188                         return ctl;
 189
 190                 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
 191                         result = 1; /* do restart aneg */
 192         }
 193
 194         /* Only restart aneg if we are advertising something different
 195          * than we were before.  */
 196         if (result > 0)
 197                 result = genphy_restart_aneg(phydev);
 198
 199         return result;
 200 }
 201
 202 /**
 203  * genphy_update_link - update link status in @phydev
 204  * @phydev: target phy_device struct
 205  *
 206  * Description: Update the value in phydev->link to reflect the
 207  *   current link value.  In order to do this, we need to read
 208  *   the status register twice, keeping the second value.
 209  */
 210 int genphy_update_link(struct phy_device *phydev)
 211 {
 212         unsigned int mii_reg;
 213
 214         /*
 215          * Wait if the link is up, and autonegotiation is in progress
 216          * (ie - we're capable and it's not done)
 217          */
 218         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 219
 220         /*
 221          * If we already saw the link up, and it hasn't gone down, then
 222          * we don't need to wait for autoneg again
 223          */
 224         if (phydev->link && mii_reg & BMSR_LSTATUS)
 225                 return 0;
 226
 227         if ((mii_reg & BMSR_ANEGCAPABLE) && !(mii_reg & BMSR_ANEGCOMPLETE)) {
 228                 int i = 0;
 229
 230                 printf("%s Waiting for PHY auto negotiation to complete",
 231                         phydev->dev->name);
 232                 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
 233                         /*
 234                          * Timeout reached ?
 235                          */
 236                         if (i > PHY_ANEG_TIMEOUT) {
 237                                 printf(" TIMEOUT !\n");
 238                                 phydev->link = 0;
 239                                 return 0;
 240                         }
 241
 242                         if (ctrlc()) {
 243                                 puts("user interrupt!\n");
 244                                 phydev->link = 0;
 245                                 return -EINTR;
 246                         }
 247
 248                         if ((i++ % 500) == 0)
 249                                 printf(".");
 250
 251                         udelay(1000);   /* 1 ms */
 252                         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 253                 }
 254                 printf(" done\n");
 255                 phydev->link = 1;
 256         } else {
 257                 /* Read the link a second time to clear the latched state */
 258                 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 259
 260                 if (mii_reg & BMSR_LSTATUS)
 261                         phydev->link = 1;
 262                 else
 263                         phydev->link = 0;
 264         }
 265
 266         return 0;
 267 }
 268
 269 /*
 270  * Generic function which updates the speed and duplex.  If
 271  * autonegotiation is enabled, it uses the AND of the link
 272  * partner's advertised capabilities and our advertised
 273  * capabilities.  If autonegotiation is disabled, we use the
 274  * appropriate bits in the control register.
 275  *
 276  * Stolen from Linux's mii.c and phy_device.c
 277  */
 278 int genphy_parse_link(struct phy_device *phydev)
 279 {
 280         int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 281
 282         /* We're using autonegotiation */
 283         if (phydev->supported & SUPPORTED_Autoneg) {
 284                 u32 lpa = 0;
 285                 int gblpa = 0;
 286                 u32 estatus = 0;
 287
 288                 /* Check for gigabit capability */
 289                 if (phydev->supported & (SUPPORTED_1000baseT_Full |
 290                                         SUPPORTED_1000baseT_Half)) {
 291                         /* We want a list of states supported by
 292                          * both PHYs in the link
 293                          */
 294                         gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
 295                         if (gblpa < 0) {
 296                                 debug("Could not read MII_STAT1000. Ignoring gigabit capability\n");
 297                                 gblpa = 0;
 298                         }
 299                         gblpa &= phy_read(phydev,
 300                                         MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
 301                 }
 302
 303                 /* Set the baseline so we only have to set them
 304                  * if they're different
 305                  */
 306                 phydev->speed = SPEED_10;
 307                 phydev->duplex = DUPLEX_HALF;
 308
 309                 /* Check the gigabit fields */
 310                 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
 311                         phydev->speed = SPEED_1000;
 312
 313                         if (gblpa & PHY_1000BTSR_1000FD)
 314                                 phydev->duplex = DUPLEX_FULL;
 315
 316                         /* We're done! */
 317                         return 0;
 318                 }
 319
 320                 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
 321                 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
 322
 323                 if (lpa & (LPA_100FULL | LPA_100HALF)) {
 324                         phydev->speed = SPEED_100;
 325
 326                         if (lpa & LPA_100FULL)
 327                                 phydev->duplex = DUPLEX_FULL;
 328
 329                 } else if (lpa & LPA_10FULL)
 330                         phydev->duplex = DUPLEX_FULL;
 331
 332                 /*
 333                  * Extended status may indicate that the PHY supports
 334                  * 1000BASE-T/X even though the 1000BASE-T registers
 335                  * are missing. In this case we can't tell whether the
 336                  * peer also supports it, so we only check extended
 337                  * status if the 1000BASE-T registers are actually
 338                  * missing.
 339                  */
 340                 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
 341                         estatus = phy_read(phydev, MDIO_DEVAD_NONE,
 342                                            MII_ESTATUS);
 343
 344                 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
 345                                 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
 346                         phydev->speed = SPEED_1000;
 347                         if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
 348                                 phydev->duplex = DUPLEX_FULL;
 349                 }
 350
 351         } else {
 352                 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 353
 354                 phydev->speed = SPEED_10;
 355                 phydev->duplex = DUPLEX_HALF;
 356
 357                 if (bmcr & BMCR_FULLDPLX)
 358                         phydev->duplex = DUPLEX_FULL;
 359
 360                 if (bmcr & BMCR_SPEED1000)
 361                         phydev->speed = SPEED_1000;
 362                 else if (bmcr & BMCR_SPEED100)
 363                         phydev->speed = SPEED_100;
 364         }
 365
 366         return 0;
 367 }
 368
 369 int genphy_config(struct phy_device *phydev)
 370 {
 371         int val;
 372         u32 features;
 373
 374         /* For now, I'll claim that the generic driver supports
 375          * all possible port types */
 376         features = (SUPPORTED_TP | SUPPORTED_MII
 377                         | SUPPORTED_AUI | SUPPORTED_FIBRE |
 378                         SUPPORTED_BNC);
 379
 380         /* Do we support autonegotiation? */
 381         val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 382
 383         if (val < 0)
 384                 return val;
 385
 386         if (val & BMSR_ANEGCAPABLE)
 387                 features |= SUPPORTED_Autoneg;
 388
 389         if (val & BMSR_100FULL)
 390                 features |= SUPPORTED_100baseT_Full;
 391         if (val & BMSR_100HALF)
 392                 features |= SUPPORTED_100baseT_Half;
 393         if (val & BMSR_10FULL)
 394                 features |= SUPPORTED_10baseT_Full;
 395         if (val & BMSR_10HALF)
 396                 features |= SUPPORTED_10baseT_Half;
 397
 398         if (val & BMSR_ESTATEN) {
 399                 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
 400
 401                 if (val < 0)
 402                         return val;
 403
 404                 if (val & ESTATUS_1000_TFULL)
 405                         features |= SUPPORTED_1000baseT_Full;
 406                 if (val & ESTATUS_1000_THALF)
 407                         features |= SUPPORTED_1000baseT_Half;
 408                 if (val & ESTATUS_1000_XFULL)
 409                         features |= SUPPORTED_1000baseX_Full;
 410                 if (val & ESTATUS_1000_XHALF)
 411                         features |= SUPPORTED_1000baseX_Half;
 412         }
 413
 414         phydev->supported = features;
 415         phydev->advertising = features;
 416
 417         genphy_config_aneg(phydev);
 418
 419         return 0;
 420 }
 421
 422 int genphy_startup(struct phy_device *phydev)
 423 {
 424         genphy_update_link(phydev);
 425         genphy_parse_link(phydev);
 426
 427         return 0;
 428 }
 429
 430 int genphy_shutdown(struct phy_device *phydev)
 431 {
 432         return 0;
 433 }
 434
 435 static struct phy_driver genphy_driver = {
 436         .uid            = 0xffffffff,
 437         .mask           = 0xffffffff,
 438         .name           = "Generic PHY",
 439         .features       = 0,
 440         .config         = genphy_config,
 441         .startup        = genphy_startup,
 442         .shutdown       = genphy_shutdown,
 443 };
 444
 445 static LIST_HEAD(phy_drivers);
 446
 447 int phy_init(void)
 448 {
 449 #ifdef CONFIG_PHY_AQUANTIA
 450         phy_aquantia_init();
 451 #endif
 452 #ifdef CONFIG_PHY_ATHEROS
 453         phy_atheros_init();
 454 #endif
 455 #ifdef CONFIG_PHY_BROADCOM
 456         phy_broadcom_init();
 457 #endif
 458 #ifdef CONFIG_PHY_CORTINA
 459         phy_cortina_init();
 460 #endif
 461 #ifdef CONFIG_PHY_DAVICOM
 462         phy_davicom_init();
 463 #endif
 464 #ifdef CONFIG_PHY_ET1011C
 465         phy_et1011c_init();
 466 #endif
 467 #ifdef CONFIG_PHY_LXT
 468         phy_lxt_init();
 469 #endif
 470 #ifdef CONFIG_PHY_MARVELL
 471         phy_marvell_init();
 472 #endif
 473 #ifdef CONFIG_PHY_MICREL
 474         phy_micrel_init();
 475 #endif
 476 #ifdef CONFIG_PHY_NATSEMI
 477         phy_natsemi_init();
 478 #endif
 479 #ifdef CONFIG_PHY_REALTEK
 480         phy_realtek_init();
 481 #endif
 482 #ifdef CONFIG_PHY_SMSC
 483         phy_smsc_init();
 484 #endif
 485 #ifdef CONFIG_PHY_TERANETICS
 486         phy_teranetics_init();
 487 #endif
 488 #ifdef CONFIG_PHY_TI
 489         phy_ti_init();
 490 #endif
 491 #ifdef CONFIG_PHY_VITESSE
 492         phy_vitesse_init();
 493 #endif
 494
 495         return 0;
 496 }
 497
 498 int phy_register(struct phy_driver *drv)
 499 {
 500         INIT_LIST_HEAD(&drv->list);
 501         list_add_tail(&drv->list, &phy_drivers);
 502
 503 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 504         if (drv->probe)
 505                 drv->probe += gd->reloc_off;
 506         if (drv->config)
 507                 drv->config += gd->reloc_off;
 508         if (drv->startup)
 509                 drv->startup += gd->reloc_off;
 510         if (drv->shutdown)
 511                 drv->shutdown += gd->reloc_off;
 512         if (drv->readext)
 513                 drv->readext += gd->reloc_off;
 514         if (drv->writeext)
 515                 drv->writeext += gd->reloc_off;
 516 #endif
 517         return 0;
 518 }
 519
 520 static int phy_probe(struct phy_device *phydev)
 521 {
 522         int err = 0;
 523
 524         phydev->advertising = phydev->supported = phydev->drv->features;
 525         phydev->mmds = phydev->drv->mmds;
 526
 527         if (phydev->drv->probe)
 528                 err = phydev->drv->probe(phydev);
 529
 530         return err;
 531 }
 532
 533 static struct phy_driver *generic_for_interface(phy_interface_t interface)
 534 {
 535 #ifdef CONFIG_PHYLIB_10G
 536         if (is_10g_interface(interface))
 537                 return &gen10g_driver;
 538 #endif
 539
 540         return &genphy_driver;
 541 }
 542
 543 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
 544                                 phy_interface_t interface)
 545 {
 546         struct list_head *entry;
 547         int phy_id = phydev->phy_id;
 548         struct phy_driver *drv = NULL;
 549
 550         list_for_each(entry, &phy_drivers) {
 551                 drv = list_entry(entry, struct phy_driver, list);
 552                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 553                         return drv;
 554         }
 555
 556         /* If we made it here, there's no driver for this PHY */
 557         return generic_for_interface(interface);
 558 }
 559
 560 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 561                                             u32 phy_id,
 562                                             phy_interface_t interface)
 563 {
 564         struct phy_device *dev;
 565
 566         /* We allocate the device, and initialize the
 567          * default values */
 568         dev = malloc(sizeof(*dev));
 569         if (!dev) {
 570                 printf("Failed to allocate PHY device for %s:%d\n",
 571                         bus->name, addr);
 572                 return NULL;
 573         }
 574
 575         memset(dev, 0, sizeof(*dev));
 576
 577         dev->duplex = -1;
 578         dev->link = 0;
 579         dev->interface = interface;
 580
 581         dev->autoneg = AUTONEG_ENABLE;
 582
 583         dev->addr = addr;
 584         dev->phy_id = phy_id;
 585         dev->bus = bus;
 586
 587         dev->drv = get_phy_driver(dev, interface);
 588
 589         phy_probe(dev);
 590
 591         bus->phymap[addr] = dev;
 592
 593         return dev;
 594 }
 595
 596 /**
 597  * get_phy_id - reads the specified addr for its ID.
 598  * @bus: the target MII bus
 599  * @addr: PHY address on the MII bus
 600  * @phy_id: where to store the ID retrieved.
 601  *
 602  * Description: Reads the ID registers of the PHY at @addr on the
 603  *   @bus, stores it in @phy_id and returns zero on success.
 604  */
 605 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 606 {
 607         int phy_reg;
 608
 609         /* Grab the bits from PHYIR1, and put them
 610          * in the upper half */
 611         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 612
 613         if (phy_reg < 0)
 614                 return -EIO;
 615
 616         *phy_id = (phy_reg & 0xffff) << 16;
 617
 618         /* Grab the bits from PHYIR2, and put them in the lower half */
 619         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 620
 621         if (phy_reg < 0)
 622                 return -EIO;
 623
 624         *phy_id |= (phy_reg & 0xffff);
 625
 626         return 0;
 627 }
 628
 629 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 630                 unsigned phy_mask, int devad, phy_interface_t interface)
 631 {
 632         u32 phy_id = 0xffffffff;
 633         while (phy_mask) {
 634                 int addr = ffs(phy_mask) - 1;
 635                 int r = get_phy_id(bus, addr, devad, &phy_id);
 636                 /* If the PHY ID is mostly f's, we didn't find anything */
 637                 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff)
 638                         return phy_device_create(bus, addr, phy_id, interface);
 639                 phy_mask &= ~(1 << addr);
 640         }
 641         return NULL;
 642 }
 643
 644 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 645                 unsigned phy_mask, phy_interface_t interface)
 646 {
 647         /* If we have one, return the existing device, with new interface */
 648         while (phy_mask) {
 649                 int addr = ffs(phy_mask) - 1;
 650                 if (bus->phymap[addr]) {
 651                         bus->phymap[addr]->interface = interface;
 652                         return bus->phymap[addr];
 653                 }
 654                 phy_mask &= ~(1 << addr);
 655         }
 656         return NULL;
 657 }
 658
 659 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 660                 unsigned phy_mask, phy_interface_t interface)
 661 {
 662         int i;
 663         struct phy_device *phydev;
 664
 665         phydev = search_for_existing_phy(bus, phy_mask, interface);
 666         if (phydev)
 667                 return phydev;
 668         /* Try Standard (ie Clause 22) access */
 669         /* Otherwise we have to try Clause 45 */
 670         for (i = 0; i < 5; i++) {
 671                 phydev = create_phy_by_mask(bus, phy_mask,
 672                                 i ? i : MDIO_DEVAD_NONE, interface);
 673                 if (IS_ERR(phydev))
 674                         return NULL;
 675                 if (phydev)
 676                         return phydev;
 677         }
 678
 679         debug("\n%s PHY: ", bus->name);
 680         while (phy_mask) {
 681                 int addr = ffs(phy_mask) - 1;
 682                 debug("%d ", addr);
 683                 phy_mask &= ~(1 << addr);
 684         }
 685         debug("not found\n");
 686
 687         return NULL;
 688 }
 689
 690 /**
 691  * get_phy_device - reads the specified PHY device and returns its @phy_device struct
 692  * @bus: the target MII bus
 693  * @addr: PHY address on the MII bus
 694  *
 695  * Description: Reads the ID registers of the PHY at @addr on the
 696  *   @bus, then allocates and returns the phy_device to represent it.
 697  */
 698 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
 699                                          phy_interface_t interface)
 700 {
 701         return get_phy_device_by_mask(bus, 1 << addr, interface);
 702 }
 703
 704 int phy_reset(struct phy_device *phydev)
 705 {
 706         int reg;
 707         int timeout = 500;
 708         int devad = MDIO_DEVAD_NONE;
 709
 710 #ifdef CONFIG_PHYLIB_10G
 711         /* If it's 10G, we need to issue reset through one of the MMDs */
 712         if (is_10g_interface(phydev->interface)) {
 713                 if (!phydev->mmds)
 714                         gen10g_discover_mmds(phydev);
 715
 716                 devad = ffs(phydev->mmds) - 1;
 717         }
 718 #endif
 719
 720         reg = phy_read(phydev, devad, MII_BMCR);
 721         if (reg < 0) {
 722                 debug("PHY status read failed\n");
 723                 return -1;
 724         }
 725
 726         reg |= BMCR_RESET;
 727
 728         if (phy_write(phydev, devad, MII_BMCR, reg) < 0) {
 729                 debug("PHY reset failed\n");
 730                 return -1;
 731         }
 732
 733 #ifdef CONFIG_PHY_RESET_DELAY
 734         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 735 #endif
 736         /*
 737          * Poll the control register for the reset bit to go to 0 (it is
 738          * auto-clearing).  This should happen within 0.5 seconds per the
 739          * IEEE spec.
 740          */
 741         while ((reg & BMCR_RESET) && timeout--) {
 742                 reg = phy_read(phydev, devad, MII_BMCR);
 743
 744                 if (reg < 0) {
 745                         debug("PHY status read failed\n");
 746                         return -1;
 747                 }
 748                 udelay(1000);
 749         }
 750
 751         if (reg & BMCR_RESET) {
 752                 puts("PHY reset timed out\n");
 753                 return -1;
 754         }
 755
 756         return 0;
 757 }
 758
 759 int miiphy_reset(const char *devname, unsigned char addr)
 760 {
 761         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 762         struct phy_device *phydev;
 763
 764         /*
 765          * miiphy_reset was only used on standard PHYs, so we'll fake it here.
 766          * If later code tries to connect with the right interface, this will
 767          * be corrected by get_phy_device in phy_connect()
 768          */
 769         phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
 770
 771         return phy_reset(phydev);
 772 }
 773
 774 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
 775                 phy_interface_t interface)
 776 {
 777         /* Reset the bus */
 778         if (bus->reset) {
 779                 bus->reset(bus);
 780
 781                 /* Wait 15ms to make sure the PHY has come out of hard reset */
 782                 udelay(15000);
 783         }
 784
 785         return get_phy_device_by_mask(bus, phy_mask, interface);
 786 }
 787
 788 #ifdef CONFIG_DM_ETH
 789 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev)
 790 #else
 791 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
 792 #endif
 793 {
 794         /* Soft Reset the PHY */
 795         phy_reset(phydev);
 796         if (phydev->dev && phydev->dev != dev) {
 797                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 798                                 phydev->bus->name, phydev->addr,
 799                                 phydev->dev->name, dev->name);
 800         }
 801         phydev->dev = dev;
 802         debug("%s connected to %s\n", dev->name, phydev->drv->name);
 803 }
 804
 805 #ifdef CONFIG_DM_ETH
 806 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 807                 struct udevice *dev, phy_interface_t interface)
 808 #else
 809 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 810                 struct eth_device *dev, phy_interface_t interface)
 811 #endif
 812 {
 813         struct phy_device *phydev;
 814
 815         phydev = phy_find_by_mask(bus, 1 << addr, interface);
 816         if (phydev)
 817                 phy_connect_dev(phydev, dev);
 818         else
 819                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
 820         return phydev;
 821 }
 822
 823 /*
 824  * Start the PHY.  Returns 0 on success, or a negative error code.
 825  */
 826 int phy_startup(struct phy_device *phydev)
 827 {
 828         if (phydev->drv->startup)
 829                 return phydev->drv->startup(phydev);
 830
 831         return 0;
 832 }
 833
 834 __weak int board_phy_config(struct phy_device *phydev)
 835 {
 836         if (phydev->drv->config)
 837                 return phydev->drv->config(phydev);
 838         return 0;
 839 }
 840
 841 int phy_config(struct phy_device *phydev)
 842 {
 843         /* Invoke an optional board-specific helper */
 844         board_phy_config(phydev);
 845
 846         return 0;
 847 }
 848
 849 int phy_shutdown(struct phy_device *phydev)
 850 {
 851         if (phydev->drv->shutdown)
 852                 phydev->drv->shutdown(phydev);
 853
 854         return 0;
 855 }
 856
 857 int phy_get_interface_by_name(const char *str)
 858 {
 859         int i;
 860
 861         for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) {
 862                 if (!strcmp(str, phy_interface_strings[i]))
 863                         return i;
 864         }
 865
 866         return -1;
 867 }