drivers/net/phy/phy.c

   1 /*
   2  * Generic PHY Management code
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of
   7  * the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  17  * MA 02111-1307 USA
  18  *
  19  *
  20  * Copyright 2011 Freescale Semiconductor, Inc.
  21  * author Andy Fleming
  22  *
  23  * Based loosely off of Linux's PHY Lib
  24  */
  25
  26 #include <config.h>
  27 #include <common.h>
  28 #include <malloc.h>
  29 #include <net.h>
  30 #include <command.h>
  31 #include <miiphy.h>
  32 #include <phy.h>
  33 #include <errno.h>
  34 #include <linux/err.h>
  35
  36 /* Generic PHY support and helper functions */
  37
  38 /**
  39  * genphy_config_advert - sanitize and advertise auto-negotation parameters
  40  * @phydev: target phy_device struct
  41  *
  42  * Description: Writes MII_ADVERTISE with the appropriate values,
  43  *   after sanitizing the values to make sure we only advertise
  44  *   what is supported.  Returns < 0 on error, 0 if the PHY's advertisement
  45  *   hasn't changed, and > 0 if it has changed.
  46  */
  47 static int genphy_config_advert(struct phy_device *phydev)
  48 {
  49         u32 advertise;
  50         int oldadv, adv;
  51         int err, changed = 0;
  52
  53         /* Only allow advertising what
  54          * this PHY supports */
  55         phydev->advertising &= phydev->supported;
  56         advertise = phydev->advertising;
  57
  58         /* Setup standard advertisement */
  59         oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
  60
  61         if (adv < 0)
  62                 return adv;
  63
  64         adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
  65                  ADVERTISE_PAUSE_ASYM);
  66         if (advertise & ADVERTISED_10baseT_Half)
  67                 adv |= ADVERTISE_10HALF;
  68         if (advertise & ADVERTISED_10baseT_Full)
  69                 adv |= ADVERTISE_10FULL;
  70         if (advertise & ADVERTISED_100baseT_Half)
  71                 adv |= ADVERTISE_100HALF;
  72         if (advertise & ADVERTISED_100baseT_Full)
  73                 adv |= ADVERTISE_100FULL;
  74         if (advertise & ADVERTISED_Pause)
  75                 adv |= ADVERTISE_PAUSE_CAP;
  76         if (advertise & ADVERTISED_Asym_Pause)
  77                 adv |= ADVERTISE_PAUSE_ASYM;
  78         if (advertise & ADVERTISED_1000baseX_Half)
  79                 adv |= ADVERTISE_1000XHALF;
  80         if (advertise & ADVERTISED_1000baseX_Full)
  81                 adv |= ADVERTISE_1000XFULL;
  82
  83         if (adv != oldadv) {
  84                 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
  85
  86                 if (err < 0)
  87                         return err;
  88                 changed = 1;
  89         }
  90
  91         /* Configure gigabit if it's supported */
  92         if (phydev->supported & (SUPPORTED_1000baseT_Half |
  93                                 SUPPORTED_1000baseT_Full)) {
  94                 oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
  95
  96                 if (adv < 0)
  97                         return adv;
  98
  99                 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
 100                 if (advertise & SUPPORTED_1000baseT_Half)
 101                         adv |= ADVERTISE_1000HALF;
 102                 if (advertise & SUPPORTED_1000baseT_Full)
 103                         adv |= ADVERTISE_1000FULL;
 104
 105                 if (adv != oldadv) {
 106                         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000,
 107                                         adv);
 108
 109                         if (err < 0)
 110                                 return err;
 111                         changed = 1;
 112                 }
 113         }
 114
 115         return changed;
 116 }
 117
 118
 119 /**
 120  * genphy_setup_forced - configures/forces speed/duplex from @phydev
 121  * @phydev: target phy_device struct
 122  *
 123  * Description: Configures MII_BMCR to force speed/duplex
 124  *   to the values in phydev. Assumes that the values are valid.
 125  */
 126 static int genphy_setup_forced(struct phy_device *phydev)
 127 {
 128         int err;
 129         int ctl = 0;
 130
 131         phydev->pause = phydev->asym_pause = 0;
 132
 133         if (SPEED_1000 == phydev->speed)
 134                 ctl |= BMCR_SPEED1000;
 135         else if (SPEED_100 == phydev->speed)
 136                 ctl |= BMCR_SPEED100;
 137
 138         if (DUPLEX_FULL == phydev->duplex)
 139                 ctl |= BMCR_FULLDPLX;
 140
 141         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 142
 143         return err;
 144 }
 145
 146
 147 /**
 148  * genphy_restart_aneg - Enable and Restart Autonegotiation
 149  * @phydev: target phy_device struct
 150  */
 151 int genphy_restart_aneg(struct phy_device *phydev)
 152 {
 153         int ctl;
 154
 155         ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 156
 157         if (ctl < 0)
 158                 return ctl;
 159
 160         ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
 161
 162         /* Don't isolate the PHY if we're negotiating */
 163         ctl &= ~(BMCR_ISOLATE);
 164
 165         ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 166
 167         return ctl;
 168 }
 169
 170
 171 /**
 172  * genphy_config_aneg - restart auto-negotiation or write BMCR
 173  * @phydev: target phy_device struct
 174  *
 175  * Description: If auto-negotiation is enabled, we configure the
 176  *   advertising, and then restart auto-negotiation.  If it is not
 177  *   enabled, then we write the BMCR.
 178  */
 179 int genphy_config_aneg(struct phy_device *phydev)
 180 {
 181         int result;
 182
 183         if (AUTONEG_ENABLE != phydev->autoneg)
 184                 return genphy_setup_forced(phydev);
 185
 186         result = genphy_config_advert(phydev);
 187
 188         if (result < 0) /* error */
 189                 return result;
 190
 191         if (result == 0) {
 192                 /* Advertisment hasn't changed, but maybe aneg was never on to
 193                  * begin with?  Or maybe phy was isolated? */
 194                 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 195
 196                 if (ctl < 0)
 197                         return ctl;
 198
 199                 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
 200                         result = 1; /* do restart aneg */
 201         }
 202
 203         /* Only restart aneg if we are advertising something different
 204          * than we were before.  */
 205         if (result > 0)
 206                 result = genphy_restart_aneg(phydev);
 207
 208         return result;
 209 }
 210
 211 /**
 212  * genphy_update_link - update link status in @phydev
 213  * @phydev: target phy_device struct
 214  *
 215  * Description: Update the value in phydev->link to reflect the
 216  *   current link value.  In order to do this, we need to read
 217  *   the status register twice, keeping the second value.
 218  */
 219 int genphy_update_link(struct phy_device *phydev)
 220 {
 221         unsigned int mii_reg;
 222
 223         /*
 224          * Wait if the link is up, and autonegotiation is in progress
 225          * (ie - we're capable and it's not done)
 226          */
 227         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 228
 229         /*
 230          * If we already saw the link up, and it hasn't gone down, then
 231          * we don't need to wait for autoneg again
 232          */
 233         if (phydev->link && mii_reg & BMSR_LSTATUS)
 234                 return 0;
 235
 236         if ((mii_reg & BMSR_ANEGCAPABLE) && !(mii_reg & BMSR_ANEGCOMPLETE)) {
 237                 int i = 0;
 238
 239                 printf("%s Waiting for PHY auto negotiation to complete",
 240                         phydev->dev->name);
 241                 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
 242                         /*
 243                          * Timeout reached ?
 244                          */
 245                         if (i > PHY_ANEG_TIMEOUT) {
 246                                 printf(" TIMEOUT !\n");
 247                                 phydev->link = 0;
 248                                 return 0;
 249                         }
 250
 251                         if (ctrlc()) {
 252                                 puts("user interrupt!\n");
 253                                 phydev->link = 0;
 254                                 return -EINTR;
 255                         }
 256
 257                         if ((i++ % 500) == 0)
 258                                 printf(".");
 259
 260                         udelay(1000);   /* 1 ms */
 261                         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 262                 }
 263                 printf(" done\n");
 264                 phydev->link = 1;
 265         } else {
 266                 /* Read the link a second time to clear the latched state */
 267                 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 268
 269                 if (mii_reg & BMSR_LSTATUS)
 270                         phydev->link = 1;
 271                 else
 272                         phydev->link = 0;
 273         }
 274
 275         return 0;
 276 }
 277
 278 /*
 279  * Generic function which updates the speed and duplex.  If
 280  * autonegotiation is enabled, it uses the AND of the link
 281  * partner's advertised capabilities and our advertised
 282  * capabilities.  If autonegotiation is disabled, we use the
 283  * appropriate bits in the control register.
 284  *
 285  * Stolen from Linux's mii.c and phy_device.c
 286  */
 287 int genphy_parse_link(struct phy_device *phydev)
 288 {
 289         int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 290
 291         /* We're using autonegotiation */
 292         if (mii_reg & BMSR_ANEGCAPABLE) {
 293                 u32 lpa = 0;
 294                 u32 gblpa = 0;
 295                 u32 estatus = 0;
 296
 297                 /* Check for gigabit capability */
 298                 if (mii_reg & BMSR_ERCAP) {
 299                         /* We want a list of states supported by
 300                          * both PHYs in the link
 301                          */
 302                         gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
 303                         gblpa &= phy_read(phydev,
 304                                         MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
 305                 }
 306
 307                 /* Set the baseline so we only have to set them
 308                  * if they're different
 309                  */
 310                 phydev->speed = SPEED_10;
 311                 phydev->duplex = DUPLEX_HALF;
 312
 313                 /* Check the gigabit fields */
 314                 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
 315                         phydev->speed = SPEED_1000;
 316
 317                         if (gblpa & PHY_1000BTSR_1000FD)
 318                                 phydev->duplex = DUPLEX_FULL;
 319
 320                         /* We're done! */
 321                         return 0;
 322                 }
 323
 324                 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
 325                 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
 326
 327                 if (lpa & (LPA_100FULL | LPA_100HALF)) {
 328                         phydev->speed = SPEED_100;
 329
 330                         if (lpa & LPA_100FULL)
 331                                 phydev->duplex = DUPLEX_FULL;
 332
 333                 } else if (lpa & LPA_10FULL)
 334                         phydev->duplex = DUPLEX_FULL;
 335
 336                 /*
 337                  * Extended status may indicate that the PHY supports
 338                  * 1000BASE-T/X even though the 1000BASE-T registers
 339                  * are missing. In this case we can't tell whether the
 340                  * peer also supports it, so we only check extended
 341                  * status if the 1000BASE-T registers are actually
 342                  * missing.
 343                  */
 344                 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
 345                         estatus = phy_read(phydev, MDIO_DEVAD_NONE,
 346                                            MII_ESTATUS);
 347
 348                 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
 349                                 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
 350                         phydev->speed = SPEED_1000;
 351                         if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
 352                                 phydev->duplex = DUPLEX_FULL;
 353                 }
 354
 355         } else {
 356                 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 357
 358                 phydev->speed = SPEED_10;
 359                 phydev->duplex = DUPLEX_HALF;
 360
 361                 if (bmcr & BMCR_FULLDPLX)
 362                         phydev->duplex = DUPLEX_FULL;
 363
 364                 if (bmcr & BMCR_SPEED1000)
 365                         phydev->speed = SPEED_1000;
 366                 else if (bmcr & BMCR_SPEED100)
 367                         phydev->speed = SPEED_100;
 368         }
 369
 370         return 0;
 371 }
 372
 373 int genphy_config(struct phy_device *phydev)
 374 {
 375         int val;
 376         u32 features;
 377
 378         /* For now, I'll claim that the generic driver supports
 379          * all possible port types */
 380         features = (SUPPORTED_TP | SUPPORTED_MII
 381                         | SUPPORTED_AUI | SUPPORTED_FIBRE |
 382                         SUPPORTED_BNC);
 383
 384         /* Do we support autonegotiation? */
 385         val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 386
 387         if (val < 0)
 388                 return val;
 389
 390         if (val & BMSR_ANEGCAPABLE)
 391                 features |= SUPPORTED_Autoneg;
 392
 393         if (val & BMSR_100FULL)
 394                 features |= SUPPORTED_100baseT_Full;
 395         if (val & BMSR_100HALF)
 396                 features |= SUPPORTED_100baseT_Half;
 397         if (val & BMSR_10FULL)
 398                 features |= SUPPORTED_10baseT_Full;
 399         if (val & BMSR_10HALF)
 400                 features |= SUPPORTED_10baseT_Half;
 401
 402         if (val & BMSR_ESTATEN) {
 403                 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
 404
 405                 if (val < 0)
 406                         return val;
 407
 408                 if (val & ESTATUS_1000_TFULL)
 409                         features |= SUPPORTED_1000baseT_Full;
 410                 if (val & ESTATUS_1000_THALF)
 411                         features |= SUPPORTED_1000baseT_Half;
 412                 if (val & ESTATUS_1000_XFULL)
 413                         features |= SUPPORTED_1000baseX_Full;
 414                 if (val & ESTATUS_1000_XHALF)
 415                         features |= SUPPORTED_1000baseX_Full;
 416         }
 417
 418         phydev->supported = features;
 419         phydev->advertising = features;
 420
 421         genphy_config_aneg(phydev);
 422
 423         return 0;
 424 }
 425
 426 int genphy_startup(struct phy_device *phydev)
 427 {
 428         genphy_update_link(phydev);
 429         genphy_parse_link(phydev);
 430
 431         return 0;
 432 }
 433
 434 int genphy_shutdown(struct phy_device *phydev)
 435 {
 436         return 0;
 437 }
 438
 439 static struct phy_driver genphy_driver = {
 440         .uid            = 0xffffffff,
 441         .mask           = 0xffffffff,
 442         .name           = "Generic PHY",
 443         .features       = 0,
 444         .config         = genphy_config,
 445         .startup        = genphy_startup,
 446         .shutdown       = genphy_shutdown,
 447 };
 448
 449 static LIST_HEAD(phy_drivers);
 450
 451 int phy_init(void)
 452 {
 453 #ifdef CONFIG_PHY_ATHEROS
 454         phy_atheros_init();
 455 #endif
 456 #ifdef CONFIG_PHY_BROADCOM
 457         phy_broadcom_init();
 458 #endif
 459 #ifdef CONFIG_PHY_DAVICOM
 460         phy_davicom_init();
 461 #endif
 462 #ifdef CONFIG_PHY_ET1011C
 463         phy_et1011c_init();
 464 #endif
 465 #ifdef CONFIG_PHY_ICPLUS
 466         phy_icplus_init();
 467 #endif
 468 #ifdef CONFIG_PHY_LXT
 469         phy_lxt_init();
 470 #endif
 471 #ifdef CONFIG_PHY_MARVELL
 472         phy_marvell_init();
 473 #endif
 474 #ifdef CONFIG_PHY_MICREL
 475         phy_micrel_init();
 476 #endif
 477 #ifdef CONFIG_PHY_NATSEMI
 478         phy_natsemi_init();
 479 #endif
 480 #ifdef CONFIG_PHY_REALTEK
 481         phy_realtek_init();
 482 #endif
 483 #ifdef CONFIG_PHY_SMSC
 484         phy_smsc_init();
 485 #endif
 486 #ifdef CONFIG_PHY_TERANETICS
 487         phy_teranetics_init();
 488 #endif
 489 #ifdef CONFIG_PHY_VITESSE
 490         phy_vitesse_init();
 491 #endif
 492
 493         return 0;
 494 }
 495
 496 int phy_register(struct phy_driver *drv)
 497 {
 498         INIT_LIST_HEAD(&drv->list);
 499         list_add_tail(&drv->list, &phy_drivers);
 500
 501         return 0;
 502 }
 503
 504 static int phy_probe(struct phy_device *phydev)
 505 {
 506         int err = 0;
 507
 508         phydev->advertising = phydev->supported = phydev->drv->features;
 509         phydev->mmds = phydev->drv->mmds;
 510
 511         if (phydev->drv->probe)
 512                 err = phydev->drv->probe(phydev);
 513
 514         return err;
 515 }
 516
 517 static struct phy_driver *generic_for_interface(phy_interface_t interface)
 518 {
 519 #ifdef CONFIG_PHYLIB_10G
 520         if (is_10g_interface(interface))
 521                 return &gen10g_driver;
 522 #endif
 523
 524         return &genphy_driver;
 525 }
 526
 527 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
 528                                 phy_interface_t interface)
 529 {
 530         struct list_head *entry;
 531         int phy_id = phydev->phy_id;
 532         struct phy_driver *drv = NULL;
 533
 534         list_for_each(entry, &phy_drivers) {
 535                 drv = list_entry(entry, struct phy_driver, list);
 536                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 537                         return drv;
 538         }
 539
 540         /* If we made it here, there's no driver for this PHY */
 541         return generic_for_interface(interface);
 542 }
 543
 544 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 545                                             int phy_id,
 546                                             phy_interface_t interface)
 547 {
 548         struct phy_device *dev;
 549
 550         /* We allocate the device, and initialize the
 551          * default values */
 552         dev = malloc(sizeof(*dev));
 553         if (!dev) {
 554                 printf("Failed to allocate PHY device for %s:%d\n",
 555                         bus->name, addr);
 556                 return NULL;
 557         }
 558
 559         memset(dev, 0, sizeof(*dev));
 560
 561         dev->duplex = -1;
 562         dev->link = 1;
 563         dev->interface = interface;
 564
 565         dev->autoneg = AUTONEG_ENABLE;
 566
 567         dev->addr = addr;
 568         dev->phy_id = phy_id;
 569         dev->bus = bus;
 570
 571         dev->drv = get_phy_driver(dev, interface);
 572
 573         phy_probe(dev);
 574
 575         bus->phymap[addr] = dev;
 576
 577         return dev;
 578 }
 579
 580 /**
 581  * get_phy_id - reads the specified addr for its ID.
 582  * @bus: the target MII bus
 583  * @addr: PHY address on the MII bus
 584  * @phy_id: where to store the ID retrieved.
 585  *
 586  * Description: Reads the ID registers of the PHY at @addr on the
 587  *   @bus, stores it in @phy_id and returns zero on success.
 588  */
 589 static int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 590 {
 591         int phy_reg;
 592
 593         /* Grab the bits from PHYIR1, and put them
 594          * in the upper half */
 595         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 596
 597         if (phy_reg < 0)
 598                 return -EIO;
 599
 600         *phy_id = (phy_reg & 0xffff) << 16;
 601
 602         /* Grab the bits from PHYIR2, and put them in the lower half */
 603         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 604
 605         if (phy_reg < 0)
 606                 return -EIO;
 607
 608         *phy_id |= (phy_reg & 0xffff);
 609
 610         return 0;
 611 }
 612
 613 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 614                 unsigned phy_mask, int devad, phy_interface_t interface)
 615 {
 616         u32 phy_id = 0xffffffff;
 617         while (phy_mask) {
 618                 int addr = ffs(phy_mask) - 1;
 619                 int r = get_phy_id(bus, addr, devad, &phy_id);
 620                 if (r < 0)
 621                         return ERR_PTR(r);
 622                 /* If the PHY ID is mostly f's, we didn't find anything */
 623                 if ((phy_id & 0x1fffffff) != 0x1fffffff)
 624                         return phy_device_create(bus, addr, phy_id, interface);
 625                 phy_mask &= ~(1 << addr);
 626         }
 627         return NULL;
 628 }
 629
 630 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 631                 unsigned phy_mask, phy_interface_t interface)
 632 {
 633         /* If we have one, return the existing device, with new interface */
 634         while (phy_mask) {
 635                 int addr = ffs(phy_mask) - 1;
 636                 if (bus->phymap[addr]) {
 637                         bus->phymap[addr]->interface = interface;
 638                         return bus->phymap[addr];
 639                 }
 640                 phy_mask &= ~(1 << addr);
 641         }
 642         return NULL;
 643 }
 644
 645 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 646                 unsigned phy_mask, phy_interface_t interface)
 647 {
 648         int i;
 649         struct phy_device *phydev;
 650
 651         phydev = search_for_existing_phy(bus, phy_mask, interface);
 652         if (phydev)
 653                 return phydev;
 654         /* Try Standard (ie Clause 22) access */
 655         /* Otherwise we have to try Clause 45 */
 656         for (i = 0; i < 5; i++) {
 657                 phydev = create_phy_by_mask(bus, phy_mask,
 658                                 i ? i : MDIO_DEVAD_NONE, interface);
 659                 if (IS_ERR(phydev))
 660                         return NULL;
 661                 if (phydev)
 662                         return phydev;
 663         }
 664         printf("Phy not found\n");
 665         return phy_device_create(bus, ffs(phy_mask) - 1, 0xffffffff, interface);
 666 }
 667
 668 /**
 669  * get_phy_device - reads the specified PHY device and returns its @phy_device struct
 670  * @bus: the target MII bus
 671  * @addr: PHY address on the MII bus
 672  *
 673  * Description: Reads the ID registers of the PHY at @addr on the
 674  *   @bus, then allocates and returns the phy_device to represent it.
 675  */
 676 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
 677                                          phy_interface_t interface)
 678 {
 679         return get_phy_device_by_mask(bus, 1 << addr, interface);
 680 }
 681
 682 int phy_reset(struct phy_device *phydev)
 683 {
 684         int reg;
 685         int timeout = 500;
 686         int devad = MDIO_DEVAD_NONE;
 687
 688 #ifdef CONFIG_PHYLIB_10G
 689         /* If it's 10G, we need to issue reset through one of the MMDs */
 690         if (is_10g_interface(phydev->interface)) {
 691                 if (!phydev->mmds)
 692                         gen10g_discover_mmds(phydev);
 693
 694                 devad = ffs(phydev->mmds) - 1;
 695         }
 696 #endif
 697
 698         reg = phy_read(phydev, devad, MII_BMCR);
 699         if (reg < 0) {
 700                 debug("PHY status read failed\n");
 701                 return -1;
 702         }
 703
 704         reg |= BMCR_RESET;
 705
 706         if (phy_write(phydev, devad, MII_BMCR, reg) < 0) {
 707                 debug("PHY reset failed\n");
 708                 return -1;
 709         }
 710
 711 #ifdef CONFIG_PHY_RESET_DELAY
 712         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 713 #endif
 714         /*
 715          * Poll the control register for the reset bit to go to 0 (it is
 716          * auto-clearing).  This should happen within 0.5 seconds per the
 717          * IEEE spec.
 718          */
 719         while ((reg & BMCR_RESET) && timeout--) {
 720                 reg = phy_read(phydev, devad, MII_BMCR);
 721
 722                 if (reg < 0) {
 723                         debug("PHY status read failed\n");
 724                         return -1;
 725                 }
 726                 udelay(1000);
 727         }
 728
 729         if (reg & BMCR_RESET) {
 730                 puts("PHY reset timed out\n");
 731                 return -1;
 732         }
 733
 734         return 0;
 735 }
 736
 737 int miiphy_reset(const char *devname, unsigned char addr)
 738 {
 739         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 740         struct phy_device *phydev;
 741
 742         /*
 743          * miiphy_reset was only used on standard PHYs, so we'll fake it here.
 744          * If later code tries to connect with the right interface, this will
 745          * be corrected by get_phy_device in phy_connect()
 746          */
 747         phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
 748
 749         return phy_reset(phydev);
 750 }
 751
 752 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
 753                 phy_interface_t interface)
 754 {
 755         /* Reset the bus */
 756         if (bus->reset)
 757                 bus->reset(bus);
 758
 759         /* Wait 15ms to make sure the PHY has come out of hard reset */
 760         udelay(15000);
 761         return get_phy_device_by_mask(bus, phy_mask, interface);
 762 }
 763
 764 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
 765 {
 766         /* Soft Reset the PHY */
 767         phy_reset(phydev);
 768         if (phydev->dev) {
 769                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 770                                 phydev->bus->name, phydev->addr,
 771                                 phydev->dev->name, dev->name);
 772         }
 773         phydev->dev = dev;
 774         debug("%s connected to %s\n", dev->name, phydev->drv->name);
 775 }
 776
 777 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 778                 struct eth_device *dev, phy_interface_t interface)
 779 {
 780         struct phy_device *phydev;
 781
 782         phydev = phy_find_by_mask(bus, 1 << addr, interface);
 783         if (phydev)
 784                 phy_connect_dev(phydev, dev);
 785         else
 786                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
 787         return phydev;
 788 }
 789
 790 /*
 791  * Start the PHY.  Returns 0 on success, or a negative error code.
 792  */
 793 int phy_startup(struct phy_device *phydev)
 794 {
 795         if (phydev->drv->startup)
 796                 return phydev->drv->startup(phydev);
 797
 798         return 0;
 799 }
 800
 801 static int __board_phy_config(struct phy_device *phydev)
 802 {
 803         if (phydev->drv->config)
 804                 return phydev->drv->config(phydev);
 805         return 0;
 806 }
 807
 808 int board_phy_config(struct phy_device *phydev)
 809         __attribute__((weak, alias("__board_phy_config")));
 810
 811 int phy_config(struct phy_device *phydev)
 812 {
 813         /* Invoke an optional board-specific helper */
 814         board_phy_config(phydev);
 815
 816         return 0;
 817 }
 818
 819 int phy_shutdown(struct phy_device *phydev)
 820 {
 821         if (phydev->drv->shutdown)
 822                 phydev->drv->shutdown(phydev);
 823
 824         return 0;
 825 }