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, bmsr;
  42         int err, changed = 0;
  43
  44         /* Only allow advertising what this PHY supports */
  45         phydev->advertising &= phydev->supported;
  46         advertise = phydev->advertising;
  47
  48         /* Setup standard advertisement */
  49         adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
  50         oldadv = adv;
  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         bmsr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
  83         if (bmsr < 0)
  84                 return bmsr;
  85
  86         /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
  87          * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
  88          * logical 1.
  89          */
  90         if (!(bmsr & BMSR_ESTATEN))
  91                 return changed;
  92
  93         /* Configure gigabit if it's supported */
  94         adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
  95         oldadv = adv;
  96
  97         if (adv < 0)
  98                 return adv;
  99
 100         adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
 101
 102         if (phydev->supported & (SUPPORTED_1000baseT_Half |
 103                                 SUPPORTED_1000baseT_Full)) {
 104                 if (advertise & SUPPORTED_1000baseT_Half)
 105                         adv |= ADVERTISE_1000HALF;
 106                 if (advertise & SUPPORTED_1000baseT_Full)
 107                         adv |= ADVERTISE_1000FULL;
 108         }
 109
 110         if (adv != oldadv)
 111                 changed = 1;
 112
 113         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, adv);
 114         if (err < 0)
 115                 return err;
 116
 117         return changed;
 118 }
 119
 120
 121 /**
 122  * genphy_setup_forced - configures/forces speed/duplex from @phydev
 123  * @phydev: target phy_device struct
 124  *
 125  * Description: Configures MII_BMCR to force speed/duplex
 126  *   to the values in phydev. Assumes that the values are valid.
 127  */
 128 static int genphy_setup_forced(struct phy_device *phydev)
 129 {
 130         int err;
 131         int ctl = BMCR_ANRESTART;
 132
 133         phydev->pause = phydev->asym_pause = 0;
 134
 135         if (SPEED_1000 == phydev->speed)
 136                 ctl |= BMCR_SPEED1000;
 137         else if (SPEED_100 == phydev->speed)
 138                 ctl |= BMCR_SPEED100;
 139
 140         if (DUPLEX_FULL == phydev->duplex)
 141                 ctl |= BMCR_FULLDPLX;
 142
 143         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 144
 145         return err;
 146 }
 147
 148
 149 /**
 150  * genphy_restart_aneg - Enable and Restart Autonegotiation
 151  * @phydev: target phy_device struct
 152  */
 153 int genphy_restart_aneg(struct phy_device *phydev)
 154 {
 155         int ctl;
 156
 157         ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 158
 159         if (ctl < 0)
 160                 return ctl;
 161
 162         ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
 163
 164         /* Don't isolate the PHY if we're negotiating */
 165         ctl &= ~(BMCR_ISOLATE);
 166
 167         ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 168
 169         return ctl;
 170 }
 171
 172
 173 /**
 174  * genphy_config_aneg - restart auto-negotiation or write BMCR
 175  * @phydev: target phy_device struct
 176  *
 177  * Description: If auto-negotiation is enabled, we configure the
 178  *   advertising, and then restart auto-negotiation.  If it is not
 179  *   enabled, then we write the BMCR.
 180  */
 181 int genphy_config_aneg(struct phy_device *phydev)
 182 {
 183         int result;
 184
 185         if (AUTONEG_ENABLE != phydev->autoneg)
 186                 return genphy_setup_forced(phydev);
 187
 188         result = genphy_config_advert(phydev);
 189
 190         if (result < 0) /* error */
 191                 return result;
 192
 193         if (result == 0) {
 194                 /* Advertisment hasn't changed, but maybe aneg was never on to
 195                  * begin with?  Or maybe phy was isolated? */
 196                 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 197
 198                 if (ctl < 0)
 199                         return ctl;
 200
 201                 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
 202                         result = 1; /* do restart aneg */
 203         }
 204
 205         /* Only restart aneg if we are advertising something different
 206          * than we were before.  */
 207         if (result > 0)
 208                 result = genphy_restart_aneg(phydev);
 209
 210         return result;
 211 }
 212
 213 /**
 214  * genphy_update_link - update link status in @phydev
 215  * @phydev: target phy_device struct
 216  *
 217  * Description: Update the value in phydev->link to reflect the
 218  *   current link value.  In order to do this, we need to read
 219  *   the status register twice, keeping the second value.
 220  */
 221 int genphy_update_link(struct phy_device *phydev)
 222 {
 223         unsigned int mii_reg;
 224
 225         /*
 226          * Wait if the link is up, and autonegotiation is in progress
 227          * (ie - we're capable and it's not done)
 228          */
 229         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 230
 231         /*
 232          * If we already saw the link up, and it hasn't gone down, then
 233          * we don't need to wait for autoneg again
 234          */
 235         if (phydev->link && mii_reg & BMSR_LSTATUS)
 236                 return 0;
 237
 238         if ((phydev->autoneg == AUTONEG_ENABLE) &&
 239             !(mii_reg & BMSR_ANEGCOMPLETE)) {
 240                 int i = 0;
 241
 242                 printf("%s Waiting for PHY auto negotiation to complete",
 243                         phydev->dev->name);
 244                 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
 245                         /*
 246                          * Timeout reached ?
 247                          */
 248                         if (i > PHY_ANEG_TIMEOUT) {
 249                                 printf(" TIMEOUT !\n");
 250                                 phydev->link = 0;
 251                                 return -ETIMEDOUT;
 252                         }
 253
 254                         if (ctrlc()) {
 255                                 puts("user interrupt!\n");
 256                                 phydev->link = 0;
 257                                 return -EINTR;
 258                         }
 259
 260                         if ((i++ % 500) == 0)
 261                                 printf(".");
 262
 263                         udelay(1000);   /* 1 ms */
 264                         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 265                 }
 266                 printf(" done\n");
 267                 phydev->link = 1;
 268         } else {
 269                 /* Read the link a second time to clear the latched state */
 270                 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 271
 272                 if (mii_reg & BMSR_LSTATUS)
 273                         phydev->link = 1;
 274                 else
 275                         phydev->link = 0;
 276         }
 277
 278         return 0;
 279 }
 280
 281 /*
 282  * Generic function which updates the speed and duplex.  If
 283  * autonegotiation is enabled, it uses the AND of the link
 284  * partner's advertised capabilities and our advertised
 285  * capabilities.  If autonegotiation is disabled, we use the
 286  * appropriate bits in the control register.
 287  *
 288  * Stolen from Linux's mii.c and phy_device.c
 289  */
 290 int genphy_parse_link(struct phy_device *phydev)
 291 {
 292         int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 293
 294         /* We're using autonegotiation */
 295         if (phydev->autoneg == AUTONEG_ENABLE) {
 296                 u32 lpa = 0;
 297                 int gblpa = 0;
 298                 u32 estatus = 0;
 299
 300                 /* Check for gigabit capability */
 301                 if (phydev->supported & (SUPPORTED_1000baseT_Full |
 302                                         SUPPORTED_1000baseT_Half)) {
 303                         /* We want a list of states supported by
 304                          * both PHYs in the link
 305                          */
 306                         gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
 307                         if (gblpa < 0) {
 308                                 debug("Could not read MII_STAT1000. Ignoring gigabit capability\n");
 309                                 gblpa = 0;
 310                         }
 311                         gblpa &= phy_read(phydev,
 312                                         MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
 313                 }
 314
 315                 /* Set the baseline so we only have to set them
 316                  * if they're different
 317                  */
 318                 phydev->speed = SPEED_10;
 319                 phydev->duplex = DUPLEX_HALF;
 320
 321                 /* Check the gigabit fields */
 322                 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
 323                         phydev->speed = SPEED_1000;
 324
 325                         if (gblpa & PHY_1000BTSR_1000FD)
 326                                 phydev->duplex = DUPLEX_FULL;
 327
 328                         /* We're done! */
 329                         return 0;
 330                 }
 331
 332                 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
 333                 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
 334
 335                 if (lpa & (LPA_100FULL | LPA_100HALF)) {
 336                         phydev->speed = SPEED_100;
 337
 338                         if (lpa & LPA_100FULL)
 339                                 phydev->duplex = DUPLEX_FULL;
 340
 341                 } else if (lpa & LPA_10FULL)
 342                         phydev->duplex = DUPLEX_FULL;
 343
 344                 /*
 345                  * Extended status may indicate that the PHY supports
 346                  * 1000BASE-T/X even though the 1000BASE-T registers
 347                  * are missing. In this case we can't tell whether the
 348                  * peer also supports it, so we only check extended
 349                  * status if the 1000BASE-T registers are actually
 350                  * missing.
 351                  */
 352                 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
 353                         estatus = phy_read(phydev, MDIO_DEVAD_NONE,
 354                                            MII_ESTATUS);
 355
 356                 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
 357                                 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
 358                         phydev->speed = SPEED_1000;
 359                         if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
 360                                 phydev->duplex = DUPLEX_FULL;
 361                 }
 362
 363         } else {
 364                 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 365
 366                 phydev->speed = SPEED_10;
 367                 phydev->duplex = DUPLEX_HALF;
 368
 369                 if (bmcr & BMCR_FULLDPLX)
 370                         phydev->duplex = DUPLEX_FULL;
 371
 372                 if (bmcr & BMCR_SPEED1000)
 373                         phydev->speed = SPEED_1000;
 374                 else if (bmcr & BMCR_SPEED100)
 375                         phydev->speed = SPEED_100;
 376         }
 377
 378         return 0;
 379 }
 380
 381 int genphy_config(struct phy_device *phydev)
 382 {
 383         int val;
 384         u32 features;
 385
 386         features = (SUPPORTED_TP | SUPPORTED_MII
 387                         | SUPPORTED_AUI | SUPPORTED_FIBRE |
 388                         SUPPORTED_BNC);
 389
 390         /* Do we support autonegotiation? */
 391         val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 392
 393         if (val < 0)
 394                 return val;
 395
 396         if (val & BMSR_ANEGCAPABLE)
 397                 features |= SUPPORTED_Autoneg;
 398
 399         if (val & BMSR_100FULL)
 400                 features |= SUPPORTED_100baseT_Full;
 401         if (val & BMSR_100HALF)
 402                 features |= SUPPORTED_100baseT_Half;
 403         if (val & BMSR_10FULL)
 404                 features |= SUPPORTED_10baseT_Full;
 405         if (val & BMSR_10HALF)
 406                 features |= SUPPORTED_10baseT_Half;
 407
 408         if (val & BMSR_ESTATEN) {
 409                 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
 410
 411                 if (val < 0)
 412                         return val;
 413
 414                 if (val & ESTATUS_1000_TFULL)
 415                         features |= SUPPORTED_1000baseT_Full;
 416                 if (val & ESTATUS_1000_THALF)
 417                         features |= SUPPORTED_1000baseT_Half;
 418                 if (val & ESTATUS_1000_XFULL)
 419                         features |= SUPPORTED_1000baseX_Full;
 420                 if (val & ESTATUS_1000_XHALF)
 421                         features |= SUPPORTED_1000baseX_Half;
 422         }
 423
 424         phydev->supported &= features;
 425         phydev->advertising &= features;
 426
 427         genphy_config_aneg(phydev);
 428
 429         return 0;
 430 }
 431
 432 int genphy_startup(struct phy_device *phydev)
 433 {
 434         int ret;
 435
 436         ret = genphy_update_link(phydev);
 437         if (ret)
 438                 return ret;
 439
 440         return genphy_parse_link(phydev);
 441 }
 442
 443 int genphy_shutdown(struct phy_device *phydev)
 444 {
 445         return 0;
 446 }
 447
 448 static struct phy_driver genphy_driver = {
 449         .uid            = 0xffffffff,
 450         .mask           = 0xffffffff,
 451         .name           = "Generic PHY",
 452         .features       = PHY_GBIT_FEATURES | SUPPORTED_MII |
 453                           SUPPORTED_AUI | SUPPORTED_FIBRE |
 454                           SUPPORTED_BNC,
 455         .config         = genphy_config,
 456         .startup        = genphy_startup,
 457         .shutdown       = genphy_shutdown,
 458 };
 459
 460 static LIST_HEAD(phy_drivers);
 461
 462 int phy_init(void)
 463 {
 464 #ifdef CONFIG_MV88E61XX_SWITCH
 465         phy_mv88e61xx_init();
 466 #endif
 467 #ifdef CONFIG_PHY_AQUANTIA
 468         phy_aquantia_init();
 469 #endif
 470 #ifdef CONFIG_PHY_ATHEROS
 471         phy_atheros_init();
 472 #endif
 473 #ifdef CONFIG_PHY_BROADCOM
 474         phy_broadcom_init();
 475 #endif
 476 #ifdef CONFIG_PHY_CORTINA
 477         phy_cortina_init();
 478 #endif
 479 #ifdef CONFIG_PHY_DAVICOM
 480         phy_davicom_init();
 481 #endif
 482 #ifdef CONFIG_PHY_ET1011C
 483         phy_et1011c_init();
 484 #endif
 485 #ifdef CONFIG_PHY_LXT
 486         phy_lxt_init();
 487 #endif
 488 #ifdef CONFIG_PHY_MARVELL
 489         phy_marvell_init();
 490 #endif
 491 #ifdef CONFIG_PHY_MICREL
 492         phy_micrel_init();
 493 #endif
 494 #ifdef CONFIG_PHY_NATSEMI
 495         phy_natsemi_init();
 496 #endif
 497 #ifdef CONFIG_PHY_REALTEK
 498         phy_realtek_init();
 499 #endif
 500 #ifdef CONFIG_PHY_SMSC
 501         phy_smsc_init();
 502 #endif
 503 #ifdef CONFIG_PHY_TERANETICS
 504         phy_teranetics_init();
 505 #endif
 506 #ifdef CONFIG_PHY_TI
 507         phy_ti_init();
 508 #endif
 509 #ifdef CONFIG_PHY_VITESSE
 510         phy_vitesse_init();
 511 #endif
 512 #ifdef CONFIG_PHY_XILINX
 513         phy_xilinx_init();
 514 #endif
 515 #ifdef CONFIG_PHY_MSCC
 516         phy_mscc_init();
 517 #endif
 518 #ifdef CONFIG_PHY_FIXED
 519         phy_fixed_init();
 520 #endif
 521         return 0;
 522 }
 523
 524 int phy_register(struct phy_driver *drv)
 525 {
 526         INIT_LIST_HEAD(&drv->list);
 527         list_add_tail(&drv->list, &phy_drivers);
 528
 529 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 530         if (drv->probe)
 531                 drv->probe += gd->reloc_off;
 532         if (drv->config)
 533                 drv->config += gd->reloc_off;
 534         if (drv->startup)
 535                 drv->startup += gd->reloc_off;
 536         if (drv->shutdown)
 537                 drv->shutdown += gd->reloc_off;
 538         if (drv->readext)
 539                 drv->readext += gd->reloc_off;
 540         if (drv->writeext)
 541                 drv->writeext += gd->reloc_off;
 542 #endif
 543         return 0;
 544 }
 545
 546 int phy_set_supported(struct phy_device *phydev, u32 max_speed)
 547 {
 548         /* The default values for phydev->supported are provided by the PHY
 549          * driver "features" member, we want to reset to sane defaults first
 550          * before supporting higher speeds.
 551          */
 552         phydev->supported &= PHY_DEFAULT_FEATURES;
 553
 554         switch (max_speed) {
 555         default:
 556                 return -ENOTSUPP;
 557         case SPEED_1000:
 558                 phydev->supported |= PHY_1000BT_FEATURES;
 559                 /* fall through */
 560         case SPEED_100:
 561                 phydev->supported |= PHY_100BT_FEATURES;
 562                 /* fall through */
 563         case SPEED_10:
 564                 phydev->supported |= PHY_10BT_FEATURES;
 565         }
 566
 567         return 0;
 568 }
 569
 570 static int phy_probe(struct phy_device *phydev)
 571 {
 572         int err = 0;
 573
 574         phydev->advertising = phydev->supported = phydev->drv->features;
 575         phydev->mmds = phydev->drv->mmds;
 576
 577         if (phydev->drv->probe)
 578                 err = phydev->drv->probe(phydev);
 579
 580         return err;
 581 }
 582
 583 static struct phy_driver *generic_for_interface(phy_interface_t interface)
 584 {
 585 #ifdef CONFIG_PHYLIB_10G
 586         if (is_10g_interface(interface))
 587                 return &gen10g_driver;
 588 #endif
 589
 590         return &genphy_driver;
 591 }
 592
 593 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
 594                                 phy_interface_t interface)
 595 {
 596         struct list_head *entry;
 597         int phy_id = phydev->phy_id;
 598         struct phy_driver *drv = NULL;
 599
 600         list_for_each(entry, &phy_drivers) {
 601                 drv = list_entry(entry, struct phy_driver, list);
 602                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 603                         return drv;
 604         }
 605
 606         /* If we made it here, there's no driver for this PHY */
 607         return generic_for_interface(interface);
 608 }
 609
 610 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 611                                             u32 phy_id,
 612                                             phy_interface_t interface)
 613 {
 614         struct phy_device *dev;
 615
 616         /* We allocate the device, and initialize the
 617          * default values */
 618         dev = malloc(sizeof(*dev));
 619         if (!dev) {
 620                 printf("Failed to allocate PHY device for %s:%d\n",
 621                         bus->name, addr);
 622                 return NULL;
 623         }
 624
 625         memset(dev, 0, sizeof(*dev));
 626
 627         dev->duplex = -1;
 628         dev->link = 0;
 629         dev->interface = interface;
 630
 631         dev->autoneg = AUTONEG_ENABLE;
 632
 633         dev->addr = addr;
 634         dev->phy_id = phy_id;
 635         dev->bus = bus;
 636
 637         dev->drv = get_phy_driver(dev, interface);
 638
 639         phy_probe(dev);
 640
 641         bus->phymap[addr] = dev;
 642
 643         return dev;
 644 }
 645
 646 /**
 647  * get_phy_id - reads the specified addr for its ID.
 648  * @bus: the target MII bus
 649  * @addr: PHY address on the MII bus
 650  * @phy_id: where to store the ID retrieved.
 651  *
 652  * Description: Reads the ID registers of the PHY at @addr on the
 653  *   @bus, stores it in @phy_id and returns zero on success.
 654  */
 655 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 656 {
 657         int phy_reg;
 658
 659         /* Grab the bits from PHYIR1, and put them
 660          * in the upper half */
 661         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 662
 663         if (phy_reg < 0)
 664                 return -EIO;
 665
 666         *phy_id = (phy_reg & 0xffff) << 16;
 667
 668         /* Grab the bits from PHYIR2, and put them in the lower half */
 669         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 670
 671         if (phy_reg < 0)
 672                 return -EIO;
 673
 674         *phy_id |= (phy_reg & 0xffff);
 675
 676         return 0;
 677 }
 678
 679 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 680                 unsigned phy_mask, int devad, phy_interface_t interface)
 681 {
 682         u32 phy_id = 0xffffffff;
 683         while (phy_mask) {
 684                 int addr = ffs(phy_mask) - 1;
 685                 int r = get_phy_id(bus, addr, devad, &phy_id);
 686                 /* If the PHY ID is mostly f's, we didn't find anything */
 687                 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff)
 688                         return phy_device_create(bus, addr, phy_id, interface);
 689                 phy_mask &= ~(1 << addr);
 690         }
 691         return NULL;
 692 }
 693
 694 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 695                 unsigned phy_mask, phy_interface_t interface)
 696 {
 697         /* If we have one, return the existing device, with new interface */
 698         while (phy_mask) {
 699                 int addr = ffs(phy_mask) - 1;
 700                 if (bus->phymap[addr]) {
 701                         bus->phymap[addr]->interface = interface;
 702                         return bus->phymap[addr];
 703                 }
 704                 phy_mask &= ~(1 << addr);
 705         }
 706         return NULL;
 707 }
 708
 709 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 710                 unsigned phy_mask, phy_interface_t interface)
 711 {
 712         int i;
 713         struct phy_device *phydev;
 714
 715         phydev = search_for_existing_phy(bus, phy_mask, interface);
 716         if (phydev)
 717                 return phydev;
 718         /* Try Standard (ie Clause 22) access */
 719         /* Otherwise we have to try Clause 45 */
 720         for (i = 0; i < 5; i++) {
 721                 phydev = create_phy_by_mask(bus, phy_mask,
 722                                 i ? i : MDIO_DEVAD_NONE, interface);
 723                 if (IS_ERR(phydev))
 724                         return NULL;
 725                 if (phydev)
 726                         return phydev;
 727         }
 728
 729         debug("\n%s PHY: ", bus->name);
 730         while (phy_mask) {
 731                 int addr = ffs(phy_mask) - 1;
 732                 debug("%d ", addr);
 733                 phy_mask &= ~(1 << addr);
 734         }
 735         debug("not found\n");
 736
 737         return NULL;
 738 }
 739
 740 /**
 741  * get_phy_device - reads the specified PHY device and returns its @phy_device struct
 742  * @bus: the target MII bus
 743  * @addr: PHY address on the MII bus
 744  *
 745  * Description: Reads the ID registers of the PHY at @addr on the
 746  *   @bus, then allocates and returns the phy_device to represent it.
 747  */
 748 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
 749                                          phy_interface_t interface)
 750 {
 751         return get_phy_device_by_mask(bus, 1 << addr, interface);
 752 }
 753
 754 int phy_reset(struct phy_device *phydev)
 755 {
 756         int reg;
 757         int timeout = 500;
 758         int devad = MDIO_DEVAD_NONE;
 759
 760         if (phydev->flags & PHY_FLAG_BROKEN_RESET)
 761                 return 0;
 762
 763 #ifdef CONFIG_PHYLIB_10G
 764         /* If it's 10G, we need to issue reset through one of the MMDs */
 765         if (is_10g_interface(phydev->interface)) {
 766                 if (!phydev->mmds)
 767                         gen10g_discover_mmds(phydev);
 768
 769                 devad = ffs(phydev->mmds) - 1;
 770         }
 771 #endif
 772
 773         if (phy_write(phydev, devad, MII_BMCR, BMCR_RESET) < 0) {
 774                 debug("PHY reset failed\n");
 775                 return -1;
 776         }
 777
 778 #ifdef CONFIG_PHY_RESET_DELAY
 779         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 780 #endif
 781         /*
 782          * Poll the control register for the reset bit to go to 0 (it is
 783          * auto-clearing).  This should happen within 0.5 seconds per the
 784          * IEEE spec.
 785          */
 786         reg = phy_read(phydev, devad, MII_BMCR);
 787         while ((reg & BMCR_RESET) && timeout--) {
 788                 reg = phy_read(phydev, devad, MII_BMCR);
 789
 790                 if (reg < 0) {
 791                         debug("PHY status read failed\n");
 792                         return -1;
 793                 }
 794                 udelay(1000);
 795         }
 796
 797         if (reg & BMCR_RESET) {
 798                 puts("PHY reset timed out\n");
 799                 return -1;
 800         }
 801
 802         return 0;
 803 }
 804
 805 int miiphy_reset(const char *devname, unsigned char addr)
 806 {
 807         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 808         struct phy_device *phydev;
 809
 810         /*
 811          * miiphy_reset was only used on standard PHYs, so we'll fake it here.
 812          * If later code tries to connect with the right interface, this will
 813          * be corrected by get_phy_device in phy_connect()
 814          */
 815         phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
 816
 817         return phy_reset(phydev);
 818 }
 819
 820 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
 821                 phy_interface_t interface)
 822 {
 823         /* Reset the bus */
 824         if (bus->reset) {
 825                 bus->reset(bus);
 826
 827                 /* Wait 15ms to make sure the PHY has come out of hard reset */
 828                 udelay(15000);
 829         }
 830
 831         return get_phy_device_by_mask(bus, phy_mask, interface);
 832 }
 833
 834 #ifdef CONFIG_DM_ETH
 835 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev)
 836 #else
 837 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
 838 #endif
 839 {
 840         /* Soft Reset the PHY */
 841         phy_reset(phydev);
 842         if (phydev->dev && phydev->dev != dev) {
 843                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 844                                 phydev->bus->name, phydev->addr,
 845                                 phydev->dev->name, dev->name);
 846         }
 847         phydev->dev = dev;
 848         debug("%s connected to %s\n", dev->name, phydev->drv->name);
 849 }
 850
 851 #ifdef CONFIG_DM_ETH
 852 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 853                 struct udevice *dev, phy_interface_t interface)
 854 #else
 855 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 856                 struct eth_device *dev, phy_interface_t interface)
 857 #endif
 858 {
 859         struct phy_device *phydev = NULL;
 860 #ifdef CONFIG_PHY_FIXED
 861         int sn;
 862         const char *name;
 863         sn = fdt_first_subnode(gd->fdt_blob, dev->of_offset);
 864         while (sn > 0) {
 865                 name = fdt_get_name(gd->fdt_blob, sn, NULL);
 866                 if (name != NULL && strcmp(name, "fixed-link") == 0) {
 867                         phydev = phy_device_create(bus,
 868                                                    sn, PHY_FIXED_ID, interface);
 869                         break;
 870                 }
 871                 sn = fdt_next_subnode(gd->fdt_blob, sn);
 872         }
 873 #endif
 874         if (phydev == NULL)
 875                 phydev = phy_find_by_mask(bus, 1 << addr, interface);
 876
 877         if (phydev)
 878                 phy_connect_dev(phydev, dev);
 879         else
 880                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
 881         return phydev;
 882 }
 883
 884 /*
 885  * Start the PHY.  Returns 0 on success, or a negative error code.
 886  */
 887 int phy_startup(struct phy_device *phydev)
 888 {
 889         if (phydev->drv->startup)
 890                 return phydev->drv->startup(phydev);
 891
 892         return 0;
 893 }
 894
 895 __weak int board_phy_config(struct phy_device *phydev)
 896 {
 897         if (phydev->drv->config)
 898                 return phydev->drv->config(phydev);
 899         return 0;
 900 }
 901
 902 int phy_config(struct phy_device *phydev)
 903 {
 904         /* Invoke an optional board-specific helper */
 905         return board_phy_config(phydev);
 906 }
 907
 908 int phy_shutdown(struct phy_device *phydev)
 909 {
 910         if (phydev->drv->shutdown)
 911                 phydev->drv->shutdown(phydev);
 912
 913         return 0;
 914 }
 915
 916 int phy_get_interface_by_name(const char *str)
 917 {
 918         int i;
 919
 920         for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) {
 921                 if (!strcmp(str, phy_interface_strings[i]))
 922                         return i;
 923         }
 924
 925         return -1;
 926 }