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 <dm.h>
  15 #include <malloc.h>
  16 #include <net.h>
  17 #include <command.h>
  18 #include <miiphy.h>
  19 #include <phy.h>
  20 #include <errno.h>
  21 #include <linux/err.h>
  22 #include <linux/compiler.h>
  23
  24 DECLARE_GLOBAL_DATA_PTR;
  25
  26 /* Generic PHY support and helper functions */
  27
  28 /**
  29  * genphy_config_advert - sanitize and advertise auto-negotation parameters
  30  * @phydev: target phy_device struct
  31  *
  32  * Description: Writes MII_ADVERTISE with the appropriate values,
  33  *   after sanitizing the values to make sure we only advertise
  34  *   what is supported.  Returns < 0 on error, 0 if the PHY's advertisement
  35  *   hasn't changed, and > 0 if it has changed.
  36  */
  37 static int genphy_config_advert(struct phy_device *phydev)
  38 {
  39         u32 advertise;
  40         int oldadv, adv;
  41         int err, changed = 0;
  42
  43         /* Only allow advertising what
  44          * this PHY supports */
  45         phydev->advertising &= phydev->supported;
  46         advertise = phydev->advertising;
  47
  48         /* Setup standard advertisement */
  49         oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
  50         if (adv < 0)
  51                 return adv;
  52
  53         adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
  54                  ADVERTISE_PAUSE_ASYM);
  55         if (advertise & ADVERTISED_10baseT_Half)
  56                 adv |= ADVERTISE_10HALF;
  57         if (advertise & ADVERTISED_10baseT_Full)
  58                 adv |= ADVERTISE_10FULL;
  59         if (advertise & ADVERTISED_100baseT_Half)
  60                 adv |= ADVERTISE_100HALF;
  61         if (advertise & ADVERTISED_100baseT_Full)
  62                 adv |= ADVERTISE_100FULL;
  63         if (advertise & ADVERTISED_Pause)
  64                 adv |= ADVERTISE_PAUSE_CAP;
  65         if (advertise & ADVERTISED_Asym_Pause)
  66                 adv |= ADVERTISE_PAUSE_ASYM;
  67         if (advertise & ADVERTISED_1000baseX_Half)
  68                 adv |= ADVERTISE_1000XHALF;
  69         if (advertise & ADVERTISED_1000baseX_Full)
  70                 adv |= ADVERTISE_1000XFULL;
  71
  72         if (adv != oldadv) {
  73                 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
  74
  75                 if (err < 0)
  76                         return err;
  77                 changed = 1;
  78         }
  79
  80         /* Configure gigabit if it's supported */
  81         if (phydev->supported & (SUPPORTED_1000baseT_Half |
  82                                 SUPPORTED_1000baseT_Full)) {
  83                 oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
  84                 if (adv < 0)
  85                         return adv;
  86
  87                 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
  88                 if (advertise & SUPPORTED_1000baseT_Half)
  89                         adv |= ADVERTISE_1000HALF;
  90                 if (advertise & SUPPORTED_1000baseT_Full)
  91                         adv |= ADVERTISE_1000FULL;
  92
  93                 if (adv != oldadv) {
  94                         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000,
  95                                         adv);
  96
  97                         if (err < 0)
  98                                 return err;
  99                         changed = 1;
 100                 }
 101         }
 102
 103         return changed;
 104 }
 105
 106
 107 /**
 108  * genphy_setup_forced - configures/forces speed/duplex from @phydev
 109  * @phydev: target phy_device struct
 110  *
 111  * Description: Configures MII_BMCR to force speed/duplex
 112  *   to the values in phydev. Assumes that the values are valid.
 113  */
 114 static int genphy_setup_forced(struct phy_device *phydev)
 115 {
 116         int ctl = 0;
 117
 118         phydev->pause = phydev->asym_pause = 0;
 119
 120         if (SPEED_1000 == phydev->speed)
 121                 ctl |= BMCR_SPEED1000;
 122         else if (SPEED_100 == phydev->speed)
 123                 ctl |= BMCR_SPEED100;
 124
 125         if (DUPLEX_FULL == phydev->duplex)
 126                 ctl |= BMCR_FULLDPLX;
 127
 128         return phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 129 }
 130
 131
 132 /**
 133  * genphy_restart_aneg - Enable and Restart Autonegotiation
 134  * @phydev: target phy_device struct
 135  */
 136 int genphy_restart_aneg(struct phy_device *phydev)
 137 {
 138         int ctl;
 139
 140         ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 141         if (ctl < 0)
 142                 return ctl;
 143
 144         ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
 145
 146         /* Don't isolate the PHY if we're negotiating */
 147         ctl &= ~(BMCR_ISOLATE);
 148
 149         return phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 150 }
 151
 152
 153 /**
 154  * genphy_config_aneg - restart auto-negotiation or write BMCR
 155  * @phydev: target phy_device struct
 156  *
 157  * Description: If auto-negotiation is enabled, we configure the
 158  *   advertising, and then restart auto-negotiation.  If it is not
 159  *   enabled, then we write the BMCR.
 160  */
 161 int genphy_config_aneg(struct phy_device *phydev)
 162 {
 163         int result;
 164
 165         if (AUTONEG_ENABLE != phydev->autoneg)
 166                 return genphy_setup_forced(phydev);
 167
 168         result = genphy_config_advert(phydev);
 169
 170         if (result < 0) /* error */
 171                 return result;
 172
 173         if (result == 0) {
 174                 /* Advertisment hasn't changed, but maybe aneg was never on to
 175                  * begin with?  Or maybe phy was isolated? */
 176                 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 177
 178                 if (ctl < 0)
 179                         return ctl;
 180
 181                 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
 182                         result = 1; /* do restart aneg */
 183         }
 184
 185         /* Only restart aneg if we are advertising something different
 186          * than we were before.  */
 187         if (result > 0)
 188                 result = genphy_restart_aneg(phydev);
 189
 190         return result;
 191 }
 192
 193 /**
 194  * genphy_update_link - update link status in @phydev
 195  * @phydev: target phy_device struct
 196  *
 197  * Description: Update the value in phydev->link to reflect the
 198  *   current link value.  In order to do this, we need to read
 199  *   the status register twice, keeping the second value.
 200  */
 201 int genphy_update_link(struct phy_device *phydev)
 202 {
 203         int mii_reg;
 204         int bmcr;
 205
 206         /*
 207          * Wait if the link is up, and autonegotiation is in progress
 208          * (ie - we're capable and it's not done)
 209          */
 210         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 211         if (mii_reg < 0)
 212                 return mii_reg;
 213
 214         /*
 215          * If we already saw the link up, and it hasn't gone down, then
 216          * we don't need to wait for autoneg again
 217          */
 218         if (phydev->link && mii_reg & BMSR_LSTATUS)
 219                 return 0;
 220
 221         bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 222         if (bmcr < 0)
 223                 return bmcr;
 224
 225         if (!(bmcr & BMCR_ANENABLE))
 226                 return 0;
 227
 228         if ((mii_reg & BMSR_ANEGCAPABLE) && !(mii_reg & BMSR_ANEGCOMPLETE)) {
 229                 int i = 0;
 230
 231                 printf("%s Waiting for PHY auto negotiation to complete",
 232                         phydev->dev->name);
 233                 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
 234                         /*
 235                          * Timeout reached ?
 236                          */
 237                         if (i > PHY_ANEG_TIMEOUT) {
 238                                 printf(" TIMEOUT !\n");
 239                                 phydev->link = 0;
 240                                 return 0;
 241                         }
 242
 243                         if (ctrlc()) {
 244                                 puts("user interrupt!\n");
 245                                 phydev->link = 0;
 246                                 return -EINTR;
 247                         }
 248
 249                         if ((i++ % 500) == 0)
 250                                 printf(".");
 251
 252                         udelay(1000);   /* 1 ms */
 253                         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 254                         if (mii_reg < 0)
 255                                 return mii_reg;
 256                 }
 257                 printf(" done\n");
 258                 phydev->link = 1;
 259         } else {
 260                 /* Read the link a second time to clear the latched state */
 261                 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 262                 if (mii_reg < 0)
 263                         return mii_reg;
 264
 265                 if (mii_reg & BMSR_LSTATUS)
 266                         phydev->link = 1;
 267                 else
 268                         phydev->link = 0;
 269         }
 270
 271         return 0;
 272 }
 273
 274 /*
 275  * Generic function which updates the speed and duplex.  If
 276  * autonegotiation is enabled, it uses the AND of the link
 277  * partner's advertised capabilities and our advertised
 278  * capabilities.  If autonegotiation is disabled, we use the
 279  * appropriate bits in the control register.
 280  *
 281  * Stolen from Linux's mii.c and phy_device.c
 282  */
 283 int genphy_parse_link(struct phy_device *phydev)
 284 {
 285         int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 286
 287         if (mii_reg < 0)
 288                 return mii_reg;
 289
 290         /* We're using autonegotiation */
 291         if (phydev->supported & SUPPORTED_Autoneg) {
 292                 int ret;
 293                 u32 lpa = 0;
 294                 u32 gblpa = 0;
 295                 u32 estatus = 0;
 296
 297                 /* Check for gigabit capability */
 298                 if (phydev->supported & (SUPPORTED_1000baseT_Full |
 299                                         SUPPORTED_1000baseT_Half)) {
 300                         /* We want a list of states supported by
 301                          * both PHYs in the link
 302                          */
 303                         ret = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
 304                         if (ret < 0) {
 305                                 debug("Could not read MII_STAT1000. Ignoring gigabit capability\n");
 306                                 ret = 0;
 307                         }
 308                         gblpa = ret;
 309
 310                         ret = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
 311                         if (ret < 0)
 312                                 return ret;
 313                         gblpa &= ret << 2;
 314                 }
 315
 316                 /* Set the baseline so we only have to set them
 317                  * if they're different
 318                  */
 319                 phydev->speed = SPEED_10;
 320                 phydev->duplex = DUPLEX_HALF;
 321
 322                 /* Check the gigabit fields */
 323                 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
 324                         phydev->speed = SPEED_1000;
 325
 326                         if (gblpa & PHY_1000BTSR_1000FD)
 327                                 phydev->duplex = DUPLEX_FULL;
 328
 329                         /* We're done! */
 330                         return 0;
 331                 }
 332
 333                 ret = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
 334                 if (ret < 0)
 335                         return ret;
 336                 lpa = ret;
 337
 338                 ret = phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
 339                 if (ret < 0)
 340                         return ret;
 341                 lpa &= ret;
 342
 343                 if (lpa & (LPA_100FULL | LPA_100HALF)) {
 344                         phydev->speed = SPEED_100;
 345
 346                         if (lpa & LPA_100FULL)
 347                                 phydev->duplex = DUPLEX_FULL;
 348
 349                 } else if (lpa & LPA_10FULL)
 350                         phydev->duplex = DUPLEX_FULL;
 351
 352                 /*
 353                  * Extended status may indicate that the PHY supports
 354                  * 1000BASE-T/X even though the 1000BASE-T registers
 355                  * are missing. In this case we can't tell whether the
 356                  * peer also supports it, so we only check extended
 357                  * status if the 1000BASE-T registers are actually
 358                  * missing.
 359                  */
 360                 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
 361                         estatus = phy_read(phydev, MDIO_DEVAD_NONE,
 362                                            MII_ESTATUS);
 363                 if (estatus < 0)
 364                         return estatus;
 365
 366                 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
 367                                 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
 368                         phydev->speed = SPEED_1000;
 369                         if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
 370                                 phydev->duplex = DUPLEX_FULL;
 371                 }
 372
 373         } else {
 374                 int bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 375
 376                 if (bmcr < 0)
 377                         return bmcr;
 378
 379                 phydev->speed = SPEED_10;
 380                 phydev->duplex = DUPLEX_HALF;
 381
 382                 if (bmcr & BMCR_FULLDPLX)
 383                         phydev->duplex = DUPLEX_FULL;
 384
 385                 if (bmcr & BMCR_SPEED1000)
 386                         phydev->speed = SPEED_1000;
 387                 else if (bmcr & BMCR_SPEED100)
 388                         phydev->speed = SPEED_100;
 389         }
 390
 391         return 0;
 392 }
 393
 394 int genphy_config(struct phy_device *phydev)
 395 {
 396         int val;
 397         u32 features;
 398
 399         /* For now, I'll claim that the generic driver supports
 400          * all possible port types */
 401         features = (SUPPORTED_TP | SUPPORTED_MII
 402                         | SUPPORTED_AUI | SUPPORTED_FIBRE |
 403                         SUPPORTED_BNC);
 404
 405         /* Do we support autonegotiation? */
 406         val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 407         if (val < 0)
 408                 return val;
 409
 410         if (val & BMSR_ANEGCAPABLE)
 411                 features |= SUPPORTED_Autoneg;
 412
 413         if (val & BMSR_100FULL)
 414                 features |= SUPPORTED_100baseT_Full;
 415         if (val & BMSR_100HALF)
 416                 features |= SUPPORTED_100baseT_Half;
 417         if (val & BMSR_10FULL)
 418                 features |= SUPPORTED_10baseT_Full;
 419         if (val & BMSR_10HALF)
 420                 features |= SUPPORTED_10baseT_Half;
 421
 422         if (val & BMSR_ESTATEN) {
 423                 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
 424
 425                 if (val < 0)
 426                         return val;
 427
 428                 if (val & ESTATUS_1000_TFULL)
 429                         features |= SUPPORTED_1000baseT_Full;
 430                 if (val & ESTATUS_1000_THALF)
 431                         features |= SUPPORTED_1000baseT_Half;
 432                 if (val & ESTATUS_1000_XFULL)
 433                         features |= SUPPORTED_1000baseX_Full;
 434                 if (val & ESTATUS_1000_XHALF)
 435                         features |= SUPPORTED_1000baseX_Half;
 436         }
 437
 438         phydev->supported = features;
 439         phydev->advertising = features;
 440
 441         genphy_config_aneg(phydev);
 442
 443         return 0;
 444 }
 445
 446 int genphy_startup(struct phy_device *phydev)
 447 {
 448         genphy_update_link(phydev);
 449         genphy_parse_link(phydev);
 450
 451         return 0;
 452 }
 453
 454 int genphy_shutdown(struct phy_device *phydev)
 455 {
 456         return 0;
 457 }
 458
 459 static struct phy_driver genphy_driver = {
 460         .uid            = 0xffffffff,
 461         .mask           = 0xffffffff,
 462         .name           = "Generic PHY",
 463         .features       = 0,
 464         .config         = genphy_config,
 465         .startup        = genphy_startup,
 466         .shutdown       = genphy_shutdown,
 467 };
 468
 469 static LIST_HEAD(phy_drivers);
 470
 471 int phy_init(void)
 472 {
 473 #ifdef CONFIG_PHY_AQUANTIA
 474         phy_aquantia_init();
 475 #endif
 476 #ifdef CONFIG_PHY_ATHEROS
 477         phy_atheros_init();
 478 #endif
 479 #ifdef CONFIG_PHY_BROADCOM
 480         phy_broadcom_init();
 481 #endif
 482 #ifdef CONFIG_PHY_CORTINA
 483         phy_cortina_init();
 484 #endif
 485 #ifdef CONFIG_PHY_DAVICOM
 486         phy_davicom_init();
 487 #endif
 488 #ifdef CONFIG_PHY_ET1011C
 489         phy_et1011c_init();
 490 #endif
 491 #ifdef CONFIG_PHY_LXT
 492         phy_lxt_init();
 493 #endif
 494 #ifdef CONFIG_PHY_MARVELL
 495         phy_marvell_init();
 496 #endif
 497 #ifdef CONFIG_PHY_MICREL
 498         phy_micrel_init();
 499 #endif
 500 #ifdef CONFIG_PHY_NATSEMI
 501         phy_natsemi_init();
 502 #endif
 503 #ifdef CONFIG_PHY_REALTEK
 504         phy_realtek_init();
 505 #endif
 506 #ifdef CONFIG_PHY_SMSC
 507         phy_smsc_init();
 508 #endif
 509 #ifdef CONFIG_PHY_TERANETICS
 510         phy_teranetics_init();
 511 #endif
 512 #ifdef CONFIG_PHY_VITESSE
 513         phy_vitesse_init();
 514 #endif
 515
 516         return 0;
 517 }
 518
 519 int phy_register(struct phy_driver *drv)
 520 {
 521         INIT_LIST_HEAD(&drv->list);
 522         list_add_tail(&drv->list, &phy_drivers);
 523
 524 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 525         if (drv->probe)
 526                 drv->probe += gd->reloc_off;
 527         if (drv->config)
 528                 drv->config += gd->reloc_off;
 529         if (drv->startup)
 530                 drv->startup += gd->reloc_off;
 531         if (drv->shutdown)
 532                 drv->shutdown += gd->reloc_off;
 533         if (drv->readext)
 534                 drv->readext += gd->reloc_off;
 535         if (drv->writeext)
 536                 drv->writeext += gd->reloc_off;
 537 #endif
 538         return 0;
 539 }
 540
 541 static int phy_probe(struct phy_device *phydev)
 542 {
 543         int err = 0;
 544
 545         phydev->advertising = phydev->supported = phydev->drv->features;
 546         phydev->mmds = phydev->drv->mmds;
 547
 548         if (phydev->drv->probe)
 549                 err = phydev->drv->probe(phydev);
 550
 551         return err;
 552 }
 553
 554 static struct phy_driver *generic_for_interface(phy_interface_t interface)
 555 {
 556 #ifdef CONFIG_PHYLIB_10G
 557         if (is_10g_interface(interface))
 558                 return &gen10g_driver;
 559 #endif
 560
 561         return &genphy_driver;
 562 }
 563
 564 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
 565                                 phy_interface_t interface)
 566 {
 567         struct list_head *entry;
 568         int phy_id = phydev->phy_id;
 569         struct phy_driver *drv = NULL;
 570
 571         list_for_each(entry, &phy_drivers) {
 572                 drv = list_entry(entry, struct phy_driver, list);
 573                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 574                         return drv;
 575         }
 576
 577         /* If we made it here, there's no driver for this PHY */
 578         return generic_for_interface(interface);
 579 }
 580
 581 static int aneg_enabled(struct phy_device *phydev)
 582 {
 583         static const char *aneg = "_aneg";
 584         char varname[strlen(phydev->bus->name) + strlen(aneg) + 1];
 585
 586         snprintf(varname, sizeof(varname), "%s%s", phydev->bus->name, aneg);
 587         return getenv_yesno(varname);
 588 }
 589
 590 static int phy_get_speed(struct phy_device *phydev)
 591 {
 592         int ret;
 593         static const char *aneg = "_speed";
 594         char varname[strlen(phydev->bus->name) + strlen(aneg) + 1];
 595         ulong val;
 596
 597         snprintf(varname, sizeof(varname), "%s%s", phydev->bus->name, aneg);
 598
 599         val = getenv_ulong(varname, 10, 100);
 600         switch (val) {
 601         case 1000:
 602                 ret = SPEED_1000;
 603                 break;
 604         case 100:
 605                 ret = SPEED_100;
 606                 break;
 607         case 10:
 608                 ret = SPEED_10;
 609                 break;
 610         default:
 611                 printf("Improper setting '%s' for %s; assuming 100\n",
 612                         getenv(varname), varname);
 613                 ret = SPEED_100;
 614         }
 615         return ret;
 616 }
 617
 618 static int phy_get_duplex(struct phy_device *phydev)
 619 {
 620         int ret = DUPLEX_FULL;
 621         static const char *aneg = "_duplex";
 622         char varname[strlen(phydev->bus->name) + strlen(aneg) + 4];
 623         const char *val;
 624
 625         snprintf(varname, sizeof(varname), "%s%d%s",
 626                 phydev->bus->name, phydev->addr, aneg);
 627
 628         val = getenv(varname);
 629         if (val != NULL) {
 630                 if (strcasecmp(val, "full") != 0) {
 631                         if (strcasecmp(val, "half") == 0) {
 632                                 ret = DUPLEX_HALF;
 633                         } else {
 634                                 printf("Improper setting '%s' for %s; assuming 'full'\n",
 635                                         val, varname);
 636                                 printf("Expected one of: 'full', 'half'\n");
 637                         }
 638                 }
 639         }
 640
 641         return ret;
 642 }
 643
 644 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 645                                             u32 phy_id,
 646                                             phy_interface_t interface)
 647 {
 648         struct phy_device *dev;
 649
 650         /* We allocate the device, and initialize the
 651          * default values */
 652         dev = malloc(sizeof(*dev));
 653         if (!dev) {
 654                 printf("Failed to allocate PHY device for %s:%d\n",
 655                         bus->name, addr);
 656                 return NULL;
 657         }
 658
 659         memset(dev, 0, sizeof(*dev));
 660
 661         dev->duplex = -1;
 662         dev->link = 1;
 663         dev->interface = interface;
 664
 665         dev->addr = addr;
 666         dev->phy_id = phy_id;
 667         dev->bus = bus;
 668
 669         dev->drv = get_phy_driver(dev, interface);
 670
 671         if (aneg_enabled(dev)) {
 672                 dev->autoneg = AUTONEG_ENABLE;
 673         } else {
 674                 dev->autoneg = AUTONEG_DISABLE;
 675                 dev->speed = phy_get_speed(dev);
 676                 dev->duplex = phy_get_duplex(dev);
 677
 678                 switch (dev->speed) {
 679                 case SPEED_1000:
 680                         if (dev->duplex == DUPLEX_FULL)
 681                                 dev->supported &= SUPPORTED_1000baseT_Full;
 682                         else
 683                                 dev->supported &= SUPPORTED_1000baseT_Half;
 684                         break;
 685                 case SPEED_100:
 686                         if (dev->duplex == DUPLEX_FULL)
 687                                 dev->supported &= SUPPORTED_100baseT_Full;
 688                         else
 689                                 dev->supported &= SUPPORTED_100baseT_Half;
 690                         break;
 691                 case SPEED_10:
 692                         if (dev->duplex == DUPLEX_FULL)
 693                                 dev->supported &= SUPPORTED_10baseT_Full;
 694                         else
 695                                 dev->supported &= SUPPORTED_10baseT_Half;
 696                         break;
 697                 default:
 698                         printf("Unsupported speed: %d\n", dev->speed);
 699                 }
 700         }
 701
 702         phy_probe(dev);
 703
 704         bus->phymap[addr] = dev;
 705
 706         return dev;
 707 }
 708
 709 /**
 710  * get_phy_id - reads the specified addr for its ID.
 711  * @bus: the target MII bus
 712  * @addr: PHY address on the MII bus
 713  * @phy_id: where to store the ID retrieved.
 714  *
 715  * Description: Reads the ID registers of the PHY at @addr on the
 716  *   @bus, stores it in @phy_id and returns zero on success.
 717  */
 718 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 719 {
 720         int phy_reg;
 721
 722         /* Grab the bits from PHYIR1, and put them
 723          * in the upper half */
 724         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 725
 726         if (phy_reg < 0)
 727                 return -EIO;
 728
 729         *phy_id = (phy_reg & 0xffff) << 16;
 730
 731         /* Grab the bits from PHYIR2, and put them in the lower half */
 732         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 733
 734         if (phy_reg < 0)
 735                 return -EIO;
 736
 737         *phy_id |= (phy_reg & 0xffff);
 738
 739         return 0;
 740 }
 741
 742 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 743                 unsigned phy_mask, int devad, phy_interface_t interface)
 744 {
 745         u32 phy_id = 0xffffffff;
 746         while (phy_mask) {
 747                 int addr = ffs(phy_mask) - 1;
 748                 int r = get_phy_id(bus, addr, devad, &phy_id);
 749                 /* If the PHY ID is mostly f's, we didn't find anything */
 750                 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff)
 751                         return phy_device_create(bus, addr, phy_id, interface);
 752                 phy_mask &= ~(1 << addr);
 753         }
 754         return NULL;
 755 }
 756
 757 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 758                 unsigned phy_mask, phy_interface_t interface)
 759 {
 760         /* If we have one, return the existing device, with new interface */
 761         while (phy_mask) {
 762                 int addr = ffs(phy_mask) - 1;
 763                 if (bus->phymap[addr]) {
 764                         bus->phymap[addr]->interface = interface;
 765                         return bus->phymap[addr];
 766                 }
 767                 phy_mask &= ~(1 << addr);
 768         }
 769         return NULL;
 770 }
 771
 772 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 773                 unsigned phy_mask, phy_interface_t interface)
 774 {
 775         int i;
 776         struct phy_device *phydev;
 777
 778         phydev = search_for_existing_phy(bus, phy_mask, interface);
 779         if (phydev)
 780                 return phydev;
 781         /* Try Standard (ie Clause 22) access */
 782         /* Otherwise we have to try Clause 45 */
 783         for (i = 0; i < 5; i++) {
 784                 phydev = create_phy_by_mask(bus, phy_mask,
 785                                 i ? i : MDIO_DEVAD_NONE, interface);
 786                 if (IS_ERR(phydev))
 787                         return NULL;
 788                 if (phydev)
 789                         return phydev;
 790         }
 791         printf("Phy %d not found\n", ffs(phy_mask) - 1);
 792         return phy_device_create(bus, ffs(phy_mask) - 1, 0xffffffff, interface);
 793 }
 794
 795 /**
 796  * get_phy_device - reads the specified PHY device and returns its @phy_device struct
 797  * @bus: the target MII bus
 798  * @addr: PHY address on the MII bus
 799  *
 800  * Description: Reads the ID registers of the PHY at @addr on the
 801  *   @bus, then allocates and returns the phy_device to represent it.
 802  */
 803 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
 804                                          phy_interface_t interface)
 805 {
 806         return get_phy_device_by_mask(bus, 1 << addr, interface);
 807 }
 808
 809 int phy_reset(struct phy_device *phydev)
 810 {
 811         int err;
 812         int reg;
 813         int timeout = 500;
 814         int devad = MDIO_DEVAD_NONE;
 815
 816 #ifdef CONFIG_PHYLIB_10G
 817         /* If it's 10G, we need to issue reset through one of the MMDs */
 818         if (is_10g_interface(phydev->interface)) {
 819                 if (!phydev->mmds)
 820                         gen10g_discover_mmds(phydev);
 821
 822                 devad = ffs(phydev->mmds) - 1;
 823         }
 824 #endif
 825
 826         reg = phy_read(phydev, devad, MII_BMCR);
 827         if (reg < 0) {
 828                 debug("PHY status read failed\n");
 829                 return -1;
 830         }
 831
 832         reg |= BMCR_RESET;
 833
 834         err = phy_write(phydev, devad, MII_BMCR, reg);
 835         if (err < 0) {
 836                 debug("PHY reset failed\n");
 837                 return err;
 838         }
 839
 840 #ifdef CONFIG_PHY_RESET_DELAY
 841         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 842 #endif
 843         /*
 844          * Poll the control register for the reset bit to go to 0 (it is
 845          * auto-clearing).  This should happen within 0.5 seconds per the
 846          * IEEE spec.
 847          */
 848         while ((reg & BMCR_RESET) && timeout-- >= 0) {
 849                 reg = phy_read(phydev, devad, MII_BMCR);
 850
 851                 if (reg < 0) {
 852                         debug("PHY status read failed\n");
 853                         return reg;
 854                 }
 855                 udelay(1000);
 856         }
 857
 858         if (reg & BMCR_RESET) {
 859                 puts("PHY reset timed out\n");
 860                 return -ETIMEDOUT;
 861         }
 862
 863         return 0;
 864 }
 865
 866 int miiphy_reset(const char *devname, unsigned char addr)
 867 {
 868         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 869         struct phy_device *phydev;
 870
 871         /*
 872          * miiphy_reset was only used on standard PHYs, so we'll fake it here.
 873          * If later code tries to connect with the right interface, this will
 874          * be corrected by get_phy_device in phy_connect()
 875          */
 876         phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
 877
 878         return phy_reset(phydev);
 879 }
 880
 881 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
 882                 phy_interface_t interface)
 883 {
 884         /* Reset the bus */
 885         if (bus->reset)
 886                 bus->reset(bus);
 887
 888         /* Wait 15ms to make sure the PHY has come out of hard reset */
 889         udelay(15000);
 890         return get_phy_device_by_mask(bus, phy_mask, interface);
 891 }
 892
 893 #ifdef CONFIG_DM_ETH
 894 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev)
 895 #else
 896 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
 897 #endif
 898 {
 899         /* Soft Reset the PHY */
 900         phy_reset(phydev);
 901         if (phydev->dev) {
 902                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 903                                 phydev->bus->name, phydev->addr,
 904                                 phydev->dev->name, dev->name);
 905         }
 906         phydev->dev = dev;
 907         debug("%s connected to %s\n", dev->name, phydev->drv->name);
 908 }
 909
 910 #ifdef CONFIG_DM_ETH
 911 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 912                 struct udevice *dev, phy_interface_t interface)
 913 #else
 914 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 915                 struct eth_device *dev, phy_interface_t interface)
 916 #endif
 917 {
 918         struct phy_device *phydev;
 919
 920         phydev = phy_find_by_mask(bus, 1 << addr, interface);
 921         if (phydev)
 922                 phy_connect_dev(phydev, dev);
 923         else
 924                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
 925         return phydev;
 926 }
 927
 928 /*
 929  * Start the PHY.  Returns 0 on success, or a negative error code.
 930  */
 931 int phy_startup(struct phy_device *phydev)
 932 {
 933         if (phydev->drv->startup)
 934                 return phydev->drv->startup(phydev);
 935
 936         return 0;
 937 }
 938
 939 __weak int board_phy_config(struct phy_device *phydev)
 940 {
 941         if (phydev->drv->config)
 942                 return phydev->drv->config(phydev);
 943         return 0;
 944 }
 945
 946 int phy_config(struct phy_device *phydev)
 947 {
 948         /* Invoke an optional board-specific helper */
 949         board_phy_config(phydev);
 950
 951         return 0;
 952 }
 953
 954 int phy_shutdown(struct phy_device *phydev)
 955 {
 956         if (phydev->drv->shutdown)
 957                 phydev->drv->shutdown(phydev);
 958
 959         return 0;
 960 }
 961
 962 int phy_get_interface_by_name(const char *str)
 963 {
 964         int i;
 965
 966         for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) {
 967                 if (!strcmp(str, phy_interface_strings[i]))
 968                         return i;
 969         }
 970
 971         return -1;
 972 }