git.sur5r.net Git - u-boot/blob - drivers/net/phy/phy.c

   1 /*
   2  * Generic PHY Management code
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  *
   6  * Copyright 2011 Freescale Semiconductor, Inc.
   7  * author Andy Fleming
   8  *
   9  * Based loosely off of Linux's PHY Lib
  10  */
  11
  12 #include <config.h>
  13 #include <common.h>
  14 #include <console.h>
  15 #include <dm.h>
  16 #include <malloc.h>
  17 #include <net.h>
  18 #include <command.h>
  19 #include <miiphy.h>
  20 #include <phy.h>
  21 #include <errno.h>
  22 #include <linux/err.h>
  23 #include <linux/compiler.h>
  24
  25 DECLARE_GLOBAL_DATA_PTR;
  26
  27 /* Generic PHY support and helper functions */
  28
  29 /**
  30  * genphy_config_advert - sanitize and advertise auto-negotation parameters
  31  * @phydev: target phy_device struct
  32  *
  33  * Description: Writes MII_ADVERTISE with the appropriate values,
  34  *   after sanitizing the values to make sure we only advertise
  35  *   what is supported.  Returns < 0 on error, 0 if the PHY's advertisement
  36  *   hasn't changed, and > 0 if it has changed.
  37  */
  38 static int genphy_config_advert(struct phy_device *phydev)
  39 {
  40         u32 advertise;
  41         int oldadv, adv, bmsr;
  42         int err, changed = 0;
  43
  44         /* Only allow advertising what this PHY supports */
  45         phydev->advertising &= phydev->supported;
  46         advertise = phydev->advertising;
  47
  48         /* Setup standard advertisement */
  49         adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
  50         oldadv = adv;
  51
  52         if (adv < 0)
  53                 return adv;
  54
  55         adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
  56                  ADVERTISE_PAUSE_ASYM);
  57         if (advertise & ADVERTISED_10baseT_Half)
  58                 adv |= ADVERTISE_10HALF;
  59         if (advertise & ADVERTISED_10baseT_Full)
  60                 adv |= ADVERTISE_10FULL;
  61         if (advertise & ADVERTISED_100baseT_Half)
  62                 adv |= ADVERTISE_100HALF;
  63         if (advertise & ADVERTISED_100baseT_Full)
  64                 adv |= ADVERTISE_100FULL;
  65         if (advertise & ADVERTISED_Pause)
  66                 adv |= ADVERTISE_PAUSE_CAP;
  67         if (advertise & ADVERTISED_Asym_Pause)
  68                 adv |= ADVERTISE_PAUSE_ASYM;
  69         if (advertise & ADVERTISED_1000baseX_Half)
  70                 adv |= ADVERTISE_1000XHALF;
  71         if (advertise & ADVERTISED_1000baseX_Full)
  72                 adv |= ADVERTISE_1000XFULL;
  73
  74         if (adv != oldadv) {
  75                 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
  76
  77                 if (err < 0)
  78                         return err;
  79                 changed = 1;
  80         }
  81
  82         bmsr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
  83         if (bmsr < 0)
  84                 return bmsr;
  85
  86         /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
  87          * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
  88          * logical 1.
  89          */
  90         if (!(bmsr & BMSR_ESTATEN))
  91                 return changed;
  92
  93         /* Configure gigabit if it's supported */
  94         adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
  95         oldadv = adv;
  96
  97         if (adv < 0)
  98                 return adv;
  99
 100         adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
 101
 102         if (phydev->supported & (SUPPORTED_1000baseT_Half |
 103                                 SUPPORTED_1000baseT_Full)) {
 104                 if (advertise & SUPPORTED_1000baseT_Half)
 105                         adv |= ADVERTISE_1000HALF;
 106                 if (advertise & SUPPORTED_1000baseT_Full)
 107                         adv |= ADVERTISE_1000FULL;
 108         }
 109
 110         if (adv != oldadv)
 111                 changed = 1;
 112
 113         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, adv);
 114         if (err < 0)
 115                 return err;
 116
 117         return changed;
 118 }
 119
 120
 121 /**
 122  * genphy_setup_forced - configures/forces speed/duplex from @phydev
 123  * @phydev: target phy_device struct
 124  *
 125  * Description: Configures MII_BMCR to force speed/duplex
 126  *   to the values in phydev. Assumes that the values are valid.
 127  */
 128 static int genphy_setup_forced(struct phy_device *phydev)
 129 {
 130         int err;
 131         int ctl = BMCR_ANRESTART;
 132
 133         phydev->pause = phydev->asym_pause = 0;
 134
 135         if (SPEED_1000 == phydev->speed)
 136                 ctl |= BMCR_SPEED1000;
 137         else if (SPEED_100 == phydev->speed)
 138                 ctl |= BMCR_SPEED100;
 139
 140         if (DUPLEX_FULL == phydev->duplex)
 141                 ctl |= BMCR_FULLDPLX;
 142
 143         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 144
 145         return err;
 146 }
 147
 148
 149 /**
 150  * genphy_restart_aneg - Enable and Restart Autonegotiation
 151  * @phydev: target phy_device struct
 152  */
 153 int genphy_restart_aneg(struct phy_device *phydev)
 154 {
 155         int ctl;
 156
 157         ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 158
 159         if (ctl < 0)
 160                 return ctl;
 161
 162         ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
 163
 164         /* Don't isolate the PHY if we're negotiating */
 165         ctl &= ~(BMCR_ISOLATE);
 166
 167         ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 168
 169         return ctl;
 170 }
 171
 172
 173 /**
 174  * genphy_config_aneg - restart auto-negotiation or write BMCR
 175  * @phydev: target phy_device struct
 176  *
 177  * Description: If auto-negotiation is enabled, we configure the
 178  *   advertising, and then restart auto-negotiation.  If it is not
 179  *   enabled, then we write the BMCR.
 180  */
 181 int genphy_config_aneg(struct phy_device *phydev)
 182 {
 183         int result;
 184
 185         if (AUTONEG_ENABLE != phydev->autoneg)
 186                 return genphy_setup_forced(phydev);
 187
 188         result = genphy_config_advert(phydev);
 189
 190         if (result < 0) /* error */
 191                 return result;
 192
 193         if (result == 0) {
 194                 /* Advertisment hasn't changed, but maybe aneg was never on to
 195                  * begin with?  Or maybe phy was isolated? */
 196                 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 197
 198                 if (ctl < 0)
 199                         return ctl;
 200
 201                 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
 202                         result = 1; /* do restart aneg */
 203         }
 204
 205         /* Only restart aneg if we are advertising something different
 206          * than we were before.  */
 207         if (result > 0)
 208                 result = genphy_restart_aneg(phydev);
 209
 210         return result;
 211 }
 212
 213 /**
 214  * genphy_update_link - update link status in @phydev
 215  * @phydev: target phy_device struct
 216  *
 217  * Description: Update the value in phydev->link to reflect the
 218  *   current link value.  In order to do this, we need to read
 219  *   the status register twice, keeping the second value.
 220  */
 221 int genphy_update_link(struct phy_device *phydev)
 222 {
 223         unsigned int mii_reg;
 224
 225         /*
 226          * Wait if the link is up, and autonegotiation is in progress
 227          * (ie - we're capable and it's not done)
 228          */
 229         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 230
 231         /*
 232          * If we already saw the link up, and it hasn't gone down, then
 233          * we don't need to wait for autoneg again
 234          */
 235         if (phydev->link && mii_reg & BMSR_LSTATUS)
 236                 return 0;
 237
 238         if ((mii_reg & BMSR_ANEGCAPABLE) && !(mii_reg & BMSR_ANEGCOMPLETE)) {
 239                 int i = 0;
 240
 241                 printf("%s Waiting for PHY auto negotiation to complete",
 242                         phydev->dev->name);
 243                 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
 244                         /*
 245                          * Timeout reached ?
 246                          */
 247                         if (i > PHY_ANEG_TIMEOUT) {
 248                                 printf(" TIMEOUT !\n");
 249                                 phydev->link = 0;
 250                                 return 0;
 251                         }
 252
 253                         if (ctrlc()) {
 254                                 puts("user interrupt!\n");
 255                                 phydev->link = 0;
 256                                 return -EINTR;
 257                         }
 258
 259                         if ((i++ % 500) == 0)
 260                                 printf(".");
 261
 262                         udelay(1000);   /* 1 ms */
 263                         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 264                 }
 265                 printf(" done\n");
 266                 phydev->link = 1;
 267         } else {
 268                 /* Read the link a second time to clear the latched state */
 269                 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 270
 271                 if (mii_reg & BMSR_LSTATUS)
 272                         phydev->link = 1;
 273                 else
 274                         phydev->link = 0;
 275         }
 276
 277         return 0;
 278 }
 279
 280 /*
 281  * Generic function which updates the speed and duplex.  If
 282  * autonegotiation is enabled, it uses the AND of the link
 283  * partner's advertised capabilities and our advertised
 284  * capabilities.  If autonegotiation is disabled, we use the
 285  * appropriate bits in the control register.
 286  *
 287  * Stolen from Linux's mii.c and phy_device.c
 288  */
 289 int genphy_parse_link(struct phy_device *phydev)
 290 {
 291         int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 292
 293         /* We're using autonegotiation */
 294         if (phydev->supported & SUPPORTED_Autoneg) {
 295                 u32 lpa = 0;
 296                 int gblpa = 0;
 297                 u32 estatus = 0;
 298
 299                 /* Check for gigabit capability */
 300                 if (phydev->supported & (SUPPORTED_1000baseT_Full |
 301                                         SUPPORTED_1000baseT_Half)) {
 302                         /* We want a list of states supported by
 303                          * both PHYs in the link
 304                          */
 305                         gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
 306                         if (gblpa < 0) {
 307                                 debug("Could not read MII_STAT1000. Ignoring gigabit capability\n");
 308                                 gblpa = 0;
 309                         }
 310                         gblpa &= phy_read(phydev,
 311                                         MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
 312                 }
 313
 314                 /* Set the baseline so we only have to set them
 315                  * if they're different
 316                  */
 317                 phydev->speed = SPEED_10;
 318                 phydev->duplex = DUPLEX_HALF;
 319
 320                 /* Check the gigabit fields */
 321                 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
 322                         phydev->speed = SPEED_1000;
 323
 324                         if (gblpa & PHY_1000BTSR_1000FD)
 325                                 phydev->duplex = DUPLEX_FULL;
 326
 327                         /* We're done! */
 328                         return 0;
 329                 }
 330
 331                 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
 332                 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
 333
 334                 if (lpa & (LPA_100FULL | LPA_100HALF)) {
 335                         phydev->speed = SPEED_100;
 336
 337                         if (lpa & LPA_100FULL)
 338                                 phydev->duplex = DUPLEX_FULL;
 339
 340                 } else if (lpa & LPA_10FULL)
 341                         phydev->duplex = DUPLEX_FULL;
 342
 343                 /*
 344                  * Extended status may indicate that the PHY supports
 345                  * 1000BASE-T/X even though the 1000BASE-T registers
 346                  * are missing. In this case we can't tell whether the
 347                  * peer also supports it, so we only check extended
 348                  * status if the 1000BASE-T registers are actually
 349                  * missing.
 350                  */
 351                 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
 352                         estatus = phy_read(phydev, MDIO_DEVAD_NONE,
 353                                            MII_ESTATUS);
 354
 355                 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
 356                                 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
 357                         phydev->speed = SPEED_1000;
 358                         if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
 359                                 phydev->duplex = DUPLEX_FULL;
 360                 }
 361
 362         } else {
 363                 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 364
 365                 phydev->speed = SPEED_10;
 366                 phydev->duplex = DUPLEX_HALF;
 367
 368                 if (bmcr & BMCR_FULLDPLX)
 369                         phydev->duplex = DUPLEX_FULL;
 370
 371                 if (bmcr & BMCR_SPEED1000)
 372                         phydev->speed = SPEED_1000;
 373                 else if (bmcr & BMCR_SPEED100)
 374                         phydev->speed = SPEED_100;
 375         }
 376
 377         return 0;
 378 }
 379
 380 int genphy_config(struct phy_device *phydev)
 381 {
 382         int val;
 383         u32 features;
 384
 385         features = (SUPPORTED_TP | SUPPORTED_MII
 386                         | SUPPORTED_AUI | SUPPORTED_FIBRE |
 387                         SUPPORTED_BNC);
 388
 389         /* Do we support autonegotiation? */
 390         val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 391
 392         if (val < 0)
 393                 return val;
 394
 395         if (val & BMSR_ANEGCAPABLE)
 396                 features |= SUPPORTED_Autoneg;
 397
 398         if (val & BMSR_100FULL)
 399                 features |= SUPPORTED_100baseT_Full;
 400         if (val & BMSR_100HALF)
 401                 features |= SUPPORTED_100baseT_Half;
 402         if (val & BMSR_10FULL)
 403                 features |= SUPPORTED_10baseT_Full;
 404         if (val & BMSR_10HALF)
 405                 features |= SUPPORTED_10baseT_Half;
 406
 407         if (val & BMSR_ESTATEN) {
 408                 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
 409
 410                 if (val < 0)
 411                         return val;
 412
 413                 if (val & ESTATUS_1000_TFULL)
 414                         features |= SUPPORTED_1000baseT_Full;
 415                 if (val & ESTATUS_1000_THALF)
 416                         features |= SUPPORTED_1000baseT_Half;
 417                 if (val & ESTATUS_1000_XFULL)
 418                         features |= SUPPORTED_1000baseX_Full;
 419                 if (val & ESTATUS_1000_XHALF)
 420                         features |= SUPPORTED_1000baseX_Half;
 421         }
 422
 423         phydev->supported &= features;
 424         phydev->advertising &= features;
 425
 426         genphy_config_aneg(phydev);
 427
 428         return 0;
 429 }
 430
 431 int genphy_startup(struct phy_device *phydev)
 432 {
 433         genphy_update_link(phydev);
 434         genphy_parse_link(phydev);
 435
 436         return 0;
 437 }
 438
 439 int genphy_shutdown(struct phy_device *phydev)
 440 {
 441         return 0;
 442 }
 443
 444 static struct phy_driver genphy_driver = {
 445         .uid            = 0xffffffff,
 446         .mask           = 0xffffffff,
 447         .name           = "Generic PHY",
 448         .features       = PHY_GBIT_FEATURES | SUPPORTED_MII |
 449                           SUPPORTED_AUI | SUPPORTED_FIBRE |
 450                           SUPPORTED_BNC,
 451         .config         = genphy_config,
 452         .startup        = genphy_startup,
 453         .shutdown       = genphy_shutdown,
 454 };
 455
 456 static LIST_HEAD(phy_drivers);
 457
 458 int phy_init(void)
 459 {
 460 #ifdef CONFIG_PHY_AQUANTIA
 461         phy_aquantia_init();
 462 #endif
 463 #ifdef CONFIG_PHY_ATHEROS
 464         phy_atheros_init();
 465 #endif
 466 #ifdef CONFIG_PHY_BROADCOM
 467         phy_broadcom_init();
 468 #endif
 469 #ifdef CONFIG_PHY_CORTINA
 470         phy_cortina_init();
 471 #endif
 472 #ifdef CONFIG_PHY_DAVICOM
 473         phy_davicom_init();
 474 #endif
 475 #ifdef CONFIG_PHY_ET1011C
 476         phy_et1011c_init();
 477 #endif
 478 #ifdef CONFIG_PHY_LXT
 479         phy_lxt_init();
 480 #endif
 481 #ifdef CONFIG_PHY_MARVELL
 482         phy_marvell_init();
 483 #endif
 484 #ifdef CONFIG_PHY_MICREL
 485         phy_micrel_init();
 486 #endif
 487 #ifdef CONFIG_PHY_NATSEMI
 488         phy_natsemi_init();
 489 #endif
 490 #ifdef CONFIG_PHY_REALTEK
 491         phy_realtek_init();
 492 #endif
 493 #ifdef CONFIG_PHY_SMSC
 494         phy_smsc_init();
 495 #endif
 496 #ifdef CONFIG_PHY_TERANETICS
 497         phy_teranetics_init();
 498 #endif
 499 #ifdef CONFIG_PHY_TI
 500         phy_ti_init();
 501 #endif
 502 #ifdef CONFIG_PHY_VITESSE
 503         phy_vitesse_init();
 504 #endif
 505
 506         return 0;
 507 }
 508
 509 int phy_register(struct phy_driver *drv)
 510 {
 511         INIT_LIST_HEAD(&drv->list);
 512         list_add_tail(&drv->list, &phy_drivers);
 513
 514 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 515         if (drv->probe)
 516                 drv->probe += gd->reloc_off;
 517         if (drv->config)
 518                 drv->config += gd->reloc_off;
 519         if (drv->startup)
 520                 drv->startup += gd->reloc_off;
 521         if (drv->shutdown)
 522                 drv->shutdown += gd->reloc_off;
 523         if (drv->readext)
 524                 drv->readext += gd->reloc_off;
 525         if (drv->writeext)
 526                 drv->writeext += gd->reloc_off;
 527 #endif
 528         return 0;
 529 }
 530
 531 int phy_set_supported(struct phy_device *phydev, u32 max_speed)
 532 {
 533         /* The default values for phydev->supported are provided by the PHY
 534          * driver "features" member, we want to reset to sane defaults first
 535          * before supporting higher speeds.
 536          */
 537         phydev->supported &= PHY_DEFAULT_FEATURES;
 538
 539         switch (max_speed) {
 540         default:
 541                 return -ENOTSUPP;
 542         case SPEED_1000:
 543                 phydev->supported |= PHY_1000BT_FEATURES;
 544                 /* fall through */
 545         case SPEED_100:
 546                 phydev->supported |= PHY_100BT_FEATURES;
 547                 /* fall through */
 548         case SPEED_10:
 549                 phydev->supported |= PHY_10BT_FEATURES;
 550         }
 551
 552         return 0;
 553 }
 554
 555 static int phy_probe(struct phy_device *phydev)
 556 {
 557         int err = 0;
 558
 559         phydev->advertising = phydev->supported = phydev->drv->features;
 560         phydev->mmds = phydev->drv->mmds;
 561
 562         if (phydev->drv->probe)
 563                 err = phydev->drv->probe(phydev);
 564
 565         return err;
 566 }
 567
 568 static struct phy_driver *generic_for_interface(phy_interface_t interface)
 569 {
 570 #ifdef CONFIG_PHYLIB_10G
 571         if (is_10g_interface(interface))
 572                 return &gen10g_driver;
 573 #endif
 574
 575         return &genphy_driver;
 576 }
 577
 578 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
 579                                 phy_interface_t interface)
 580 {
 581         struct list_head *entry;
 582         int phy_id = phydev->phy_id;
 583         struct phy_driver *drv = NULL;
 584
 585         list_for_each(entry, &phy_drivers) {
 586                 drv = list_entry(entry, struct phy_driver, list);
 587                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 588                         return drv;
 589         }
 590
 591         /* If we made it here, there's no driver for this PHY */
 592         return generic_for_interface(interface);
 593 }
 594
 595 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 596                                             u32 phy_id,
 597                                             phy_interface_t interface)
 598 {
 599         struct phy_device *dev;
 600
 601         /* We allocate the device, and initialize the
 602          * default values */
 603         dev = malloc(sizeof(*dev));
 604         if (!dev) {
 605                 printf("Failed to allocate PHY device for %s:%d\n",
 606                         bus->name, addr);
 607                 return NULL;
 608         }
 609
 610         memset(dev, 0, sizeof(*dev));
 611
 612         dev->duplex = -1;
 613         dev->link = 0;
 614         dev->interface = interface;
 615
 616         dev->autoneg = AUTONEG_ENABLE;
 617
 618         dev->addr = addr;
 619         dev->phy_id = phy_id;
 620         dev->bus = bus;
 621
 622         dev->drv = get_phy_driver(dev, interface);
 623
 624         phy_probe(dev);
 625
 626         bus->phymap[addr] = dev;
 627
 628         return dev;
 629 }
 630
 631 /**
 632  * get_phy_id - reads the specified addr for its ID.
 633  * @bus: the target MII bus
 634  * @addr: PHY address on the MII bus
 635  * @phy_id: where to store the ID retrieved.
 636  *
 637  * Description: Reads the ID registers of the PHY at @addr on the
 638  *   @bus, stores it in @phy_id and returns zero on success.
 639  */
 640 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 641 {
 642         int phy_reg;
 643
 644         /* Grab the bits from PHYIR1, and put them
 645          * in the upper half */
 646         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 647
 648         if (phy_reg < 0)
 649                 return -EIO;
 650
 651         *phy_id = (phy_reg & 0xffff) << 16;
 652
 653         /* Grab the bits from PHYIR2, and put them in the lower half */
 654         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 655
 656         if (phy_reg < 0)
 657                 return -EIO;
 658
 659         *phy_id |= (phy_reg & 0xffff);
 660
 661         return 0;
 662 }
 663
 664 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 665                 unsigned phy_mask, int devad, phy_interface_t interface)
 666 {
 667         u32 phy_id = 0xffffffff;
 668         while (phy_mask) {
 669                 int addr = ffs(phy_mask) - 1;
 670                 int r = get_phy_id(bus, addr, devad, &phy_id);
 671                 /* If the PHY ID is mostly f's, we didn't find anything */
 672                 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff)
 673                         return phy_device_create(bus, addr, phy_id, interface);
 674                 phy_mask &= ~(1 << addr);
 675         }
 676         return NULL;
 677 }
 678
 679 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 680                 unsigned phy_mask, phy_interface_t interface)
 681 {
 682         /* If we have one, return the existing device, with new interface */
 683         while (phy_mask) {
 684                 int addr = ffs(phy_mask) - 1;
 685                 if (bus->phymap[addr]) {
 686                         bus->phymap[addr]->interface = interface;
 687                         return bus->phymap[addr];
 688                 }
 689                 phy_mask &= ~(1 << addr);
 690         }
 691         return NULL;
 692 }
 693
 694 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 695                 unsigned phy_mask, phy_interface_t interface)
 696 {
 697         int i;
 698         struct phy_device *phydev;
 699
 700         phydev = search_for_existing_phy(bus, phy_mask, interface);
 701         if (phydev)
 702                 return phydev;
 703         /* Try Standard (ie Clause 22) access */
 704         /* Otherwise we have to try Clause 45 */
 705         for (i = 0; i < 5; i++) {
 706                 phydev = create_phy_by_mask(bus, phy_mask,
 707                                 i ? i : MDIO_DEVAD_NONE, interface);
 708                 if (IS_ERR(phydev))
 709                         return NULL;
 710                 if (phydev)
 711                         return phydev;
 712         }
 713
 714         debug("\n%s PHY: ", bus->name);
 715         while (phy_mask) {
 716                 int addr = ffs(phy_mask) - 1;
 717                 debug("%d ", addr);
 718                 phy_mask &= ~(1 << addr);
 719         }
 720         debug("not found\n");
 721
 722         return NULL;
 723 }
 724
 725 /**
 726  * get_phy_device - reads the specified PHY device and returns its @phy_device struct
 727  * @bus: the target MII bus
 728  * @addr: PHY address on the MII bus
 729  *
 730  * Description: Reads the ID registers of the PHY at @addr on the
 731  *   @bus, then allocates and returns the phy_device to represent it.
 732  */
 733 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
 734                                          phy_interface_t interface)
 735 {
 736         return get_phy_device_by_mask(bus, 1 << addr, interface);
 737 }
 738
 739 int phy_reset(struct phy_device *phydev)
 740 {
 741         int reg;
 742         int timeout = 500;
 743         int devad = MDIO_DEVAD_NONE;
 744
 745 #ifdef CONFIG_PHYLIB_10G
 746         /* If it's 10G, we need to issue reset through one of the MMDs */
 747         if (is_10g_interface(phydev->interface)) {
 748                 if (!phydev->mmds)
 749                         gen10g_discover_mmds(phydev);
 750
 751                 devad = ffs(phydev->mmds) - 1;
 752         }
 753 #endif
 754
 755         if (phy_write(phydev, devad, MII_BMCR, BMCR_RESET) < 0) {
 756                 debug("PHY reset failed\n");
 757                 return -1;
 758         }
 759
 760 #ifdef CONFIG_PHY_RESET_DELAY
 761         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 762 #endif
 763         /*
 764          * Poll the control register for the reset bit to go to 0 (it is
 765          * auto-clearing).  This should happen within 0.5 seconds per the
 766          * IEEE spec.
 767          */
 768         reg = phy_read(phydev, devad, MII_BMCR);
 769         while ((reg & BMCR_RESET) && timeout--) {
 770                 reg = phy_read(phydev, devad, MII_BMCR);
 771
 772                 if (reg < 0) {
 773                         debug("PHY status read failed\n");
 774                         return -1;
 775                 }
 776                 udelay(1000);
 777         }
 778
 779         if (reg & BMCR_RESET) {
 780                 puts("PHY reset timed out\n");
 781                 return -1;
 782         }
 783
 784         return 0;
 785 }
 786
 787 int miiphy_reset(const char *devname, unsigned char addr)
 788 {
 789         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 790         struct phy_device *phydev;
 791
 792         /*
 793          * miiphy_reset was only used on standard PHYs, so we'll fake it here.
 794          * If later code tries to connect with the right interface, this will
 795          * be corrected by get_phy_device in phy_connect()
 796          */
 797         phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
 798
 799         return phy_reset(phydev);
 800 }
 801
 802 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
 803                 phy_interface_t interface)
 804 {
 805         /* Reset the bus */
 806         if (bus->reset) {
 807                 bus->reset(bus);
 808
 809                 /* Wait 15ms to make sure the PHY has come out of hard reset */
 810                 udelay(15000);
 811         }
 812
 813         return get_phy_device_by_mask(bus, phy_mask, interface);
 814 }
 815
 816 #ifdef CONFIG_DM_ETH
 817 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev)
 818 #else
 819 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
 820 #endif
 821 {
 822         /* Soft Reset the PHY */
 823         phy_reset(phydev);
 824         if (phydev->dev && phydev->dev != dev) {
 825                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 826                                 phydev->bus->name, phydev->addr,
 827                                 phydev->dev->name, dev->name);
 828         }
 829         phydev->dev = dev;
 830         debug("%s connected to %s\n", dev->name, phydev->drv->name);
 831 }
 832
 833 #ifdef CONFIG_DM_ETH
 834 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 835                 struct udevice *dev, phy_interface_t interface)
 836 #else
 837 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 838                 struct eth_device *dev, phy_interface_t interface)
 839 #endif
 840 {
 841         struct phy_device *phydev;
 842
 843         phydev = phy_find_by_mask(bus, 1 << addr, interface);
 844         if (phydev)
 845                 phy_connect_dev(phydev, dev);
 846         else
 847                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
 848         return phydev;
 849 }
 850
 851 /*
 852  * Start the PHY.  Returns 0 on success, or a negative error code.
 853  */
 854 int phy_startup(struct phy_device *phydev)
 855 {
 856         if (phydev->drv->startup)
 857                 return phydev->drv->startup(phydev);
 858
 859         return 0;
 860 }
 861
 862 __weak int board_phy_config(struct phy_device *phydev)
 863 {
 864         if (phydev->drv->config)
 865                 return phydev->drv->config(phydev);
 866         return 0;
 867 }
 868
 869 int phy_config(struct phy_device *phydev)
 870 {
 871         /* Invoke an optional board-specific helper */
 872         board_phy_config(phydev);
 873
 874         return 0;
 875 }
 876
 877 int phy_shutdown(struct phy_device *phydev)
 878 {
 879         if (phydev->drv->shutdown)
 880                 phydev->drv->shutdown(phydev);
 881
 882         return 0;
 883 }
 884
 885 int phy_get_interface_by_name(const char *str)
 886 {
 887         int i;
 888
 889         for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) {
 890                 if (!strcmp(str, phy_interface_strings[i]))
 891                         return i;
 892         }
 893
 894         return -1;
 895 }