drivers/net/phy/phy.c

   1 /*
   2  * Generic PHY Management code
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  *
   6  * Copyright 2011 Freescale Semiconductor, Inc.
   7  * author Andy Fleming
   8  *
   9  * Based loosely off of Linux's PHY Lib
  10  */
  11
  12 #include <config.h>
  13 #include <common.h>
  14 #include <malloc.h>
  15 #include <net.h>
  16 #include <command.h>
  17 #include <miiphy.h>
  18 #include <phy.h>
  19 #include <errno.h>
  20 #include <linux/err.h>
  21 #include <linux/compiler.h>
  22
  23 /* Generic PHY support and helper functions */
  24
  25 /**
  26  * genphy_config_advert - sanitize and advertise auto-negotation parameters
  27  * @phydev: target phy_device struct
  28  *
  29  * Description: Writes MII_ADVERTISE with the appropriate values,
  30  *   after sanitizing the values to make sure we only advertise
  31  *   what is supported.  Returns < 0 on error, 0 if the PHY's advertisement
  32  *   hasn't changed, and > 0 if it has changed.
  33  */
  34 static int genphy_config_advert(struct phy_device *phydev)
  35 {
  36         u32 advertise;
  37         int oldadv, adv;
  38         int err, changed = 0;
  39
  40         /* Only allow advertising what
  41          * this PHY supports */
  42         phydev->advertising &= phydev->supported;
  43         advertise = phydev->advertising;
  44
  45         /* Setup standard advertisement */
  46         oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
  47
  48         if (adv < 0)
  49                 return adv;
  50
  51         adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
  52                  ADVERTISE_PAUSE_ASYM);
  53         if (advertise & ADVERTISED_10baseT_Half)
  54                 adv |= ADVERTISE_10HALF;
  55         if (advertise & ADVERTISED_10baseT_Full)
  56                 adv |= ADVERTISE_10FULL;
  57         if (advertise & ADVERTISED_100baseT_Half)
  58                 adv |= ADVERTISE_100HALF;
  59         if (advertise & ADVERTISED_100baseT_Full)
  60                 adv |= ADVERTISE_100FULL;
  61         if (advertise & ADVERTISED_Pause)
  62                 adv |= ADVERTISE_PAUSE_CAP;
  63         if (advertise & ADVERTISED_Asym_Pause)
  64                 adv |= ADVERTISE_PAUSE_ASYM;
  65         if (advertise & ADVERTISED_1000baseX_Half)
  66                 adv |= ADVERTISE_1000XHALF;
  67         if (advertise & ADVERTISED_1000baseX_Full)
  68                 adv |= ADVERTISE_1000XFULL;
  69
  70         if (adv != oldadv) {
  71                 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
  72
  73                 if (err < 0)
  74                         return err;
  75                 changed = 1;
  76         }
  77
  78         /* Configure gigabit if it's supported */
  79         if (phydev->supported & (SUPPORTED_1000baseT_Half |
  80                                 SUPPORTED_1000baseT_Full)) {
  81                 oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
  82
  83                 if (adv < 0)
  84                         return adv;
  85
  86                 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
  87                 if (advertise & SUPPORTED_1000baseT_Half)
  88                         adv |= ADVERTISE_1000HALF;
  89                 if (advertise & SUPPORTED_1000baseT_Full)
  90                         adv |= ADVERTISE_1000FULL;
  91
  92                 if (adv != oldadv) {
  93                         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000,
  94                                         adv);
  95
  96                         if (err < 0)
  97                                 return err;
  98                         changed = 1;
  99                 }
 100         }
 101
 102         return changed;
 103 }
 104
 105
 106 /**
 107  * genphy_setup_forced - configures/forces speed/duplex from @phydev
 108  * @phydev: target phy_device struct
 109  *
 110  * Description: Configures MII_BMCR to force speed/duplex
 111  *   to the values in phydev. Assumes that the values are valid.
 112  */
 113 static int genphy_setup_forced(struct phy_device *phydev)
 114 {
 115         int err;
 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         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 129
 130         return err;
 131 }
 132
 133
 134 /**
 135  * genphy_restart_aneg - Enable and Restart Autonegotiation
 136  * @phydev: target phy_device struct
 137  */
 138 int genphy_restart_aneg(struct phy_device *phydev)
 139 {
 140         int ctl;
 141
 142         ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 143
 144         if (ctl < 0)
 145                 return ctl;
 146
 147         ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
 148
 149         /* Don't isolate the PHY if we're negotiating */
 150         ctl &= ~(BMCR_ISOLATE);
 151
 152         ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 153
 154         return ctl;
 155 }
 156
 157
 158 /**
 159  * genphy_config_aneg - restart auto-negotiation or write BMCR
 160  * @phydev: target phy_device struct
 161  *
 162  * Description: If auto-negotiation is enabled, we configure the
 163  *   advertising, and then restart auto-negotiation.  If it is not
 164  *   enabled, then we write the BMCR.
 165  */
 166 int genphy_config_aneg(struct phy_device *phydev)
 167 {
 168         int result;
 169
 170         if (AUTONEG_ENABLE != phydev->autoneg)
 171                 return genphy_setup_forced(phydev);
 172
 173         result = genphy_config_advert(phydev);
 174
 175         if (result < 0) /* error */
 176                 return result;
 177
 178         if (result == 0) {
 179                 /* Advertisment hasn't changed, but maybe aneg was never on to
 180                  * begin with?  Or maybe phy was isolated? */
 181                 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 182
 183                 if (ctl < 0)
 184                         return ctl;
 185
 186                 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
 187                         result = 1; /* do restart aneg */
 188         }
 189
 190         /* Only restart aneg if we are advertising something different
 191          * than we were before.  */
 192         if (result > 0)
 193                 result = genphy_restart_aneg(phydev);
 194
 195         return result;
 196 }
 197
 198 /**
 199  * genphy_update_link - update link status in @phydev
 200  * @phydev: target phy_device struct
 201  *
 202  * Description: Update the value in phydev->link to reflect the
 203  *   current link value.  In order to do this, we need to read
 204  *   the status register twice, keeping the second value.
 205  */
 206 int genphy_update_link(struct phy_device *phydev)
 207 {
 208         unsigned int mii_reg;
 209
 210         /*
 211          * Wait if the link is up, and autonegotiation is in progress
 212          * (ie - we're capable and it's not done)
 213          */
 214         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 215
 216         /*
 217          * If we already saw the link up, and it hasn't gone down, then
 218          * we don't need to wait for autoneg again
 219          */
 220         if (phydev->link && mii_reg & BMSR_LSTATUS)
 221                 return 0;
 222
 223         if ((mii_reg & BMSR_ANEGCAPABLE) && !(mii_reg & BMSR_ANEGCOMPLETE)) {
 224                 int i = 0;
 225
 226                 printf("%s Waiting for PHY auto negotiation to complete",
 227                         phydev->dev->name);
 228                 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
 229                         /*
 230                          * Timeout reached ?
 231                          */
 232                         if (i > PHY_ANEG_TIMEOUT) {
 233                                 printf(" TIMEOUT !\n");
 234                                 phydev->link = 0;
 235                                 return 0;
 236                         }
 237
 238                         if (ctrlc()) {
 239                                 puts("user interrupt!\n");
 240                                 phydev->link = 0;
 241                                 return -EINTR;
 242                         }
 243
 244                         if ((i++ % 500) == 0)
 245                                 printf(".");
 246
 247                         udelay(1000);   /* 1 ms */
 248                         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 249                 }
 250                 printf(" done\n");
 251                 phydev->link = 1;
 252         } else {
 253                 /* Read the link a second time to clear the latched state */
 254                 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 255
 256                 if (mii_reg & BMSR_LSTATUS)
 257                         phydev->link = 1;
 258                 else
 259                         phydev->link = 0;
 260         }
 261
 262         return 0;
 263 }
 264
 265 /*
 266  * Generic function which updates the speed and duplex.  If
 267  * autonegotiation is enabled, it uses the AND of the link
 268  * partner's advertised capabilities and our advertised
 269  * capabilities.  If autonegotiation is disabled, we use the
 270  * appropriate bits in the control register.
 271  *
 272  * Stolen from Linux's mii.c and phy_device.c
 273  */
 274 int genphy_parse_link(struct phy_device *phydev)
 275 {
 276         int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 277
 278         /* We're using autonegotiation */
 279         if (phydev->supported & SUPPORTED_Autoneg) {
 280                 u32 lpa = 0;
 281                 int gblpa = 0;
 282                 u32 estatus = 0;
 283
 284                 /* Check for gigabit capability */
 285                 if (phydev->supported & (SUPPORTED_1000baseT_Full |
 286                                         SUPPORTED_1000baseT_Half)) {
 287                         /* We want a list of states supported by
 288                          * both PHYs in the link
 289                          */
 290                         gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
 291                         if (gblpa < 0) {
 292                                 debug("Could not read MII_STAT1000. Ignoring gigabit capability\n");
 293                                 gblpa = 0;
 294                         }
 295                         gblpa &= phy_read(phydev,
 296                                         MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
 297                 }
 298
 299                 /* Set the baseline so we only have to set them
 300                  * if they're different
 301                  */
 302                 phydev->speed = SPEED_10;
 303                 phydev->duplex = DUPLEX_HALF;
 304
 305                 /* Check the gigabit fields */
 306                 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
 307                         phydev->speed = SPEED_1000;
 308
 309                         if (gblpa & PHY_1000BTSR_1000FD)
 310                                 phydev->duplex = DUPLEX_FULL;
 311
 312                         /* We're done! */
 313                         return 0;
 314                 }
 315
 316                 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
 317                 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
 318
 319                 if (lpa & (LPA_100FULL | LPA_100HALF)) {
 320                         phydev->speed = SPEED_100;
 321
 322                         if (lpa & LPA_100FULL)
 323                                 phydev->duplex = DUPLEX_FULL;
 324
 325                 } else if (lpa & LPA_10FULL)
 326                         phydev->duplex = DUPLEX_FULL;
 327
 328                 /*
 329                  * Extended status may indicate that the PHY supports
 330                  * 1000BASE-T/X even though the 1000BASE-T registers
 331                  * are missing. In this case we can't tell whether the
 332                  * peer also supports it, so we only check extended
 333                  * status if the 1000BASE-T registers are actually
 334                  * missing.
 335                  */
 336                 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
 337                         estatus = phy_read(phydev, MDIO_DEVAD_NONE,
 338                                            MII_ESTATUS);
 339
 340                 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
 341                                 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
 342                         phydev->speed = SPEED_1000;
 343                         if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
 344                                 phydev->duplex = DUPLEX_FULL;
 345                 }
 346
 347         } else {
 348                 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 349
 350                 phydev->speed = SPEED_10;
 351                 phydev->duplex = DUPLEX_HALF;
 352
 353                 if (bmcr & BMCR_FULLDPLX)
 354                         phydev->duplex = DUPLEX_FULL;
 355
 356                 if (bmcr & BMCR_SPEED1000)
 357                         phydev->speed = SPEED_1000;
 358                 else if (bmcr & BMCR_SPEED100)
 359                         phydev->speed = SPEED_100;
 360         }
 361
 362         return 0;
 363 }
 364
 365 int genphy_config(struct phy_device *phydev)
 366 {
 367         int val;
 368         u32 features;
 369
 370         /* For now, I'll claim that the generic driver supports
 371          * all possible port types */
 372         features = (SUPPORTED_TP | SUPPORTED_MII
 373                         | SUPPORTED_AUI | SUPPORTED_FIBRE |
 374                         SUPPORTED_BNC);
 375
 376         /* Do we support autonegotiation? */
 377         val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 378
 379         if (val < 0)
 380                 return val;
 381
 382         if (val & BMSR_ANEGCAPABLE)
 383                 features |= SUPPORTED_Autoneg;
 384
 385         if (val & BMSR_100FULL)
 386                 features |= SUPPORTED_100baseT_Full;
 387         if (val & BMSR_100HALF)
 388                 features |= SUPPORTED_100baseT_Half;
 389         if (val & BMSR_10FULL)
 390                 features |= SUPPORTED_10baseT_Full;
 391         if (val & BMSR_10HALF)
 392                 features |= SUPPORTED_10baseT_Half;
 393
 394         if (val & BMSR_ESTATEN) {
 395                 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
 396
 397                 if (val < 0)
 398                         return val;
 399
 400                 if (val & ESTATUS_1000_TFULL)
 401                         features |= SUPPORTED_1000baseT_Full;
 402                 if (val & ESTATUS_1000_THALF)
 403                         features |= SUPPORTED_1000baseT_Half;
 404                 if (val & ESTATUS_1000_XFULL)
 405                         features |= SUPPORTED_1000baseX_Full;
 406                 if (val & ESTATUS_1000_XHALF)
 407                         features |= SUPPORTED_1000baseX_Half;
 408         }
 409
 410         phydev->supported = features;
 411         phydev->advertising = features;
 412
 413         genphy_config_aneg(phydev);
 414
 415         return 0;
 416 }
 417
 418 int genphy_startup(struct phy_device *phydev)
 419 {
 420         genphy_update_link(phydev);
 421         genphy_parse_link(phydev);
 422
 423         return 0;
 424 }
 425
 426 int genphy_shutdown(struct phy_device *phydev)
 427 {
 428         return 0;
 429 }
 430
 431 static struct phy_driver genphy_driver = {
 432         .uid            = 0xffffffff,
 433         .mask           = 0xffffffff,
 434         .name           = "Generic PHY",
 435         .features       = 0,
 436         .config         = genphy_config,
 437         .startup        = genphy_startup,
 438         .shutdown       = genphy_shutdown,
 439 };
 440
 441 static LIST_HEAD(phy_drivers);
 442
 443 int phy_init(void)
 444 {
 445 #ifdef CONFIG_PHY_ATHEROS
 446         phy_atheros_init();
 447 #endif
 448 #ifdef CONFIG_PHY_BROADCOM
 449         phy_broadcom_init();
 450 #endif
 451 #ifdef CONFIG_PHY_DAVICOM
 452         phy_davicom_init();
 453 #endif
 454 #ifdef CONFIG_PHY_ET1011C
 455         phy_et1011c_init();
 456 #endif
 457 #ifdef CONFIG_PHY_ICPLUS
 458         phy_icplus_init();
 459 #endif
 460 #ifdef CONFIG_PHY_LXT
 461         phy_lxt_init();
 462 #endif
 463 #ifdef CONFIG_PHY_MARVELL
 464         phy_marvell_init();
 465 #endif
 466 #ifdef CONFIG_PHY_MICREL
 467         phy_micrel_init();
 468 #endif
 469 #ifdef CONFIG_PHY_NATSEMI
 470         phy_natsemi_init();
 471 #endif
 472 #ifdef CONFIG_PHY_REALTEK
 473         phy_realtek_init();
 474 #endif
 475 #ifdef CONFIG_PHY_SMSC
 476         phy_smsc_init();
 477 #endif
 478 #ifdef CONFIG_PHY_TERANETICS
 479         phy_teranetics_init();
 480 #endif
 481 #ifdef CONFIG_PHY_VITESSE
 482         phy_vitesse_init();
 483 #endif
 484
 485         return 0;
 486 }
 487
 488 int phy_register(struct phy_driver *drv)
 489 {
 490         INIT_LIST_HEAD(&drv->list);
 491         list_add_tail(&drv->list, &phy_drivers);
 492
 493         return 0;
 494 }
 495
 496 static int phy_probe(struct phy_device *phydev)
 497 {
 498         int err = 0;
 499
 500         phydev->advertising = phydev->supported = phydev->drv->features;
 501         phydev->mmds = phydev->drv->mmds;
 502
 503         if (phydev->drv->probe)
 504                 err = phydev->drv->probe(phydev);
 505
 506         return err;
 507 }
 508
 509 static struct phy_driver *generic_for_interface(phy_interface_t interface)
 510 {
 511 #ifdef CONFIG_PHYLIB_10G
 512         if (is_10g_interface(interface))
 513                 return &gen10g_driver;
 514 #endif
 515
 516         return &genphy_driver;
 517 }
 518
 519 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
 520                                 phy_interface_t interface)
 521 {
 522         struct list_head *entry;
 523         int phy_id = phydev->phy_id;
 524         struct phy_driver *drv = NULL;
 525
 526         list_for_each(entry, &phy_drivers) {
 527                 drv = list_entry(entry, struct phy_driver, list);
 528                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 529                         return drv;
 530         }
 531
 532         /* If we made it here, there's no driver for this PHY */
 533         return generic_for_interface(interface);
 534 }
 535
 536 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 537                                             int phy_id,
 538                                             phy_interface_t interface)
 539 {
 540         struct phy_device *dev;
 541
 542         /* We allocate the device, and initialize the
 543          * default values */
 544         dev = malloc(sizeof(*dev));
 545         if (!dev) {
 546                 printf("Failed to allocate PHY device for %s:%d\n",
 547                         bus->name, addr);
 548                 return NULL;
 549         }
 550
 551         memset(dev, 0, sizeof(*dev));
 552
 553         dev->duplex = -1;
 554         dev->link = 1;
 555         dev->interface = interface;
 556
 557         dev->autoneg = AUTONEG_ENABLE;
 558
 559         dev->addr = addr;
 560         dev->phy_id = phy_id;
 561         dev->bus = bus;
 562
 563         dev->drv = get_phy_driver(dev, interface);
 564
 565         phy_probe(dev);
 566
 567         bus->phymap[addr] = dev;
 568
 569         return dev;
 570 }
 571
 572 /**
 573  * get_phy_id - reads the specified addr for its ID.
 574  * @bus: the target MII bus
 575  * @addr: PHY address on the MII bus
 576  * @phy_id: where to store the ID retrieved.
 577  *
 578  * Description: Reads the ID registers of the PHY at @addr on the
 579  *   @bus, stores it in @phy_id and returns zero on success.
 580  */
 581 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 582 {
 583         int phy_reg;
 584
 585         /* Grab the bits from PHYIR1, and put them
 586          * in the upper half */
 587         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 588
 589         if (phy_reg < 0)
 590                 return -EIO;
 591
 592         *phy_id = (phy_reg & 0xffff) << 16;
 593
 594         /* Grab the bits from PHYIR2, and put them in the lower half */
 595         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 596
 597         if (phy_reg < 0)
 598                 return -EIO;
 599
 600         *phy_id |= (phy_reg & 0xffff);
 601
 602         return 0;
 603 }
 604
 605 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 606                 unsigned phy_mask, int devad, phy_interface_t interface)
 607 {
 608         u32 phy_id = 0xffffffff;
 609         while (phy_mask) {
 610                 int addr = ffs(phy_mask) - 1;
 611                 int r = get_phy_id(bus, addr, devad, &phy_id);
 612                 if (r < 0)
 613                         return ERR_PTR(r);
 614                 /* If the PHY ID is mostly f's, we didn't find anything */
 615                 if ((phy_id & 0x1fffffff) != 0x1fffffff)
 616                         return phy_device_create(bus, addr, phy_id, interface);
 617                 phy_mask &= ~(1 << addr);
 618         }
 619         return NULL;
 620 }
 621
 622 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 623                 unsigned phy_mask, phy_interface_t interface)
 624 {
 625         /* If we have one, return the existing device, with new interface */
 626         while (phy_mask) {
 627                 int addr = ffs(phy_mask) - 1;
 628                 if (bus->phymap[addr]) {
 629                         bus->phymap[addr]->interface = interface;
 630                         return bus->phymap[addr];
 631                 }
 632                 phy_mask &= ~(1 << addr);
 633         }
 634         return NULL;
 635 }
 636
 637 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 638                 unsigned phy_mask, phy_interface_t interface)
 639 {
 640         int i;
 641         struct phy_device *phydev;
 642
 643         phydev = search_for_existing_phy(bus, phy_mask, interface);
 644         if (phydev)
 645                 return phydev;
 646         /* Try Standard (ie Clause 22) access */
 647         /* Otherwise we have to try Clause 45 */
 648         for (i = 0; i < 5; i++) {
 649                 phydev = create_phy_by_mask(bus, phy_mask,
 650                                 i ? i : MDIO_DEVAD_NONE, interface);
 651                 if (IS_ERR(phydev))
 652                         return NULL;
 653                 if (phydev)
 654                         return phydev;
 655         }
 656         printf("Phy not found\n");
 657         return phy_device_create(bus, ffs(phy_mask) - 1, 0xffffffff, interface);
 658 }
 659
 660 /**
 661  * get_phy_device - reads the specified PHY device and returns its @phy_device struct
 662  * @bus: the target MII bus
 663  * @addr: PHY address on the MII bus
 664  *
 665  * Description: Reads the ID registers of the PHY at @addr on the
 666  *   @bus, then allocates and returns the phy_device to represent it.
 667  */
 668 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
 669                                          phy_interface_t interface)
 670 {
 671         return get_phy_device_by_mask(bus, 1 << addr, interface);
 672 }
 673
 674 int phy_reset(struct phy_device *phydev)
 675 {
 676         int reg;
 677         int timeout = 500;
 678         int devad = MDIO_DEVAD_NONE;
 679
 680 #ifdef CONFIG_PHYLIB_10G
 681         /* If it's 10G, we need to issue reset through one of the MMDs */
 682         if (is_10g_interface(phydev->interface)) {
 683                 if (!phydev->mmds)
 684                         gen10g_discover_mmds(phydev);
 685
 686                 devad = ffs(phydev->mmds) - 1;
 687         }
 688 #endif
 689
 690         reg = phy_read(phydev, devad, MII_BMCR);
 691         if (reg < 0) {
 692                 debug("PHY status read failed\n");
 693                 return -1;
 694         }
 695
 696         reg |= BMCR_RESET;
 697
 698         if (phy_write(phydev, devad, MII_BMCR, reg) < 0) {
 699                 debug("PHY reset failed\n");
 700                 return -1;
 701         }
 702
 703 #ifdef CONFIG_PHY_RESET_DELAY
 704         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 705 #endif
 706         /*
 707          * Poll the control register for the reset bit to go to 0 (it is
 708          * auto-clearing).  This should happen within 0.5 seconds per the
 709          * IEEE spec.
 710          */
 711         while ((reg & BMCR_RESET) && timeout--) {
 712                 reg = phy_read(phydev, devad, MII_BMCR);
 713
 714                 if (reg < 0) {
 715                         debug("PHY status read failed\n");
 716                         return -1;
 717                 }
 718                 udelay(1000);
 719         }
 720
 721         if (reg & BMCR_RESET) {
 722                 puts("PHY reset timed out\n");
 723                 return -1;
 724         }
 725
 726         return 0;
 727 }
 728
 729 int miiphy_reset(const char *devname, unsigned char addr)
 730 {
 731         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 732         struct phy_device *phydev;
 733
 734         /*
 735          * miiphy_reset was only used on standard PHYs, so we'll fake it here.
 736          * If later code tries to connect with the right interface, this will
 737          * be corrected by get_phy_device in phy_connect()
 738          */
 739         phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
 740
 741         return phy_reset(phydev);
 742 }
 743
 744 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
 745                 phy_interface_t interface)
 746 {
 747         /* Reset the bus */
 748         if (bus->reset)
 749                 bus->reset(bus);
 750
 751         /* Wait 15ms to make sure the PHY has come out of hard reset */
 752         udelay(15000);
 753         return get_phy_device_by_mask(bus, phy_mask, interface);
 754 }
 755
 756 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
 757 {
 758         /* Soft Reset the PHY */
 759         phy_reset(phydev);
 760         if (phydev->dev) {
 761                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 762                                 phydev->bus->name, phydev->addr,
 763                                 phydev->dev->name, dev->name);
 764         }
 765         phydev->dev = dev;
 766         debug("%s connected to %s\n", dev->name, phydev->drv->name);
 767 }
 768
 769 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 770                 struct eth_device *dev, phy_interface_t interface)
 771 {
 772         struct phy_device *phydev;
 773
 774         phydev = phy_find_by_mask(bus, 1 << addr, interface);
 775         if (phydev)
 776                 phy_connect_dev(phydev, dev);
 777         else
 778                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
 779         return phydev;
 780 }
 781
 782 /*
 783  * Start the PHY.  Returns 0 on success, or a negative error code.
 784  */
 785 int phy_startup(struct phy_device *phydev)
 786 {
 787         if (phydev->drv->startup)
 788                 return phydev->drv->startup(phydev);
 789
 790         return 0;
 791 }
 792
 793 static int __board_phy_config(struct phy_device *phydev)
 794 {
 795         if (phydev->drv->config)
 796                 return phydev->drv->config(phydev);
 797         return 0;
 798 }
 799
 800 int board_phy_config(struct phy_device *phydev)
 801         __attribute__((weak, alias("__board_phy_config")));
 802
 803 int phy_config(struct phy_device *phydev)
 804 {
 805         /* Invoke an optional board-specific helper */
 806         board_phy_config(phydev);
 807
 808         return 0;
 809 }
 810
 811 int phy_shutdown(struct phy_device *phydev)
 812 {
 813         if (phydev->drv->shutdown)
 814                 phydev->drv->shutdown(phydev);
 815
 816         return 0;
 817 }