drivers/net/phy/phy.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Generic PHY Management code
   4  *
   5  * Copyright 2011 Freescale Semiconductor, Inc.
   6  * author Andy Fleming
   7  *
   8  * Based loosely off of Linux's PHY Lib
   9  */
  10 #include <common.h>
  11 #include <console.h>
  12 #include <dm.h>
  13 #include <malloc.h>
  14 #include <net.h>
  15 #include <command.h>
  16 #include <miiphy.h>
  17 #include <phy.h>
  18 #include <errno.h>
  19 #include <linux/err.h>
  20 #include <linux/compiler.h>
  21
  22 DECLARE_GLOBAL_DATA_PTR;
  23
  24 /* Generic PHY support and helper functions */
  25
  26 /**
  27  * genphy_config_advert - sanitize and advertise auto-negotiation parameters
  28  * @phydev: target phy_device struct
  29  *
  30  * Description: Writes MII_ADVERTISE with the appropriate values,
  31  *   after sanitizing the values to make sure we only advertise
  32  *   what is supported.  Returns < 0 on error, 0 if the PHY's advertisement
  33  *   hasn't changed, and > 0 if it has changed.
  34  */
  35 static int genphy_config_advert(struct phy_device *phydev)
  36 {
  37         u32 advertise;
  38         int oldadv, adv, bmsr;
  39         int err, changed = 0;
  40
  41         /* Only allow advertising what this PHY supports */
  42         phydev->advertising &= phydev->supported;
  43         advertise = phydev->advertising;
  44
  45         /* Setup standard advertisement */
  46         adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
  47         oldadv = adv;
  48
  49         if (adv < 0)
  50                 return adv;
  51
  52         adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
  53                  ADVERTISE_PAUSE_ASYM);
  54         if (advertise & ADVERTISED_10baseT_Half)
  55                 adv |= ADVERTISE_10HALF;
  56         if (advertise & ADVERTISED_10baseT_Full)
  57                 adv |= ADVERTISE_10FULL;
  58         if (advertise & ADVERTISED_100baseT_Half)
  59                 adv |= ADVERTISE_100HALF;
  60         if (advertise & ADVERTISED_100baseT_Full)
  61                 adv |= ADVERTISE_100FULL;
  62         if (advertise & ADVERTISED_Pause)
  63                 adv |= ADVERTISE_PAUSE_CAP;
  64         if (advertise & ADVERTISED_Asym_Pause)
  65                 adv |= ADVERTISE_PAUSE_ASYM;
  66         if (advertise & ADVERTISED_1000baseX_Half)
  67                 adv |= ADVERTISE_1000XHALF;
  68         if (advertise & ADVERTISED_1000baseX_Full)
  69                 adv |= ADVERTISE_1000XFULL;
  70
  71         if (adv != oldadv) {
  72                 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
  73
  74                 if (err < 0)
  75                         return err;
  76                 changed = 1;
  77         }
  78
  79         bmsr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
  80         if (bmsr < 0)
  81                 return bmsr;
  82
  83         /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
  84          * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
  85          * logical 1.
  86          */
  87         if (!(bmsr & BMSR_ESTATEN))
  88                 return changed;
  89
  90         /* Configure gigabit if it's supported */
  91         adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
  92         oldadv = adv;
  93
  94         if (adv < 0)
  95                 return adv;
  96
  97         adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
  98
  99         if (phydev->supported & (SUPPORTED_1000baseT_Half |
 100                                 SUPPORTED_1000baseT_Full)) {
 101                 if (advertise & SUPPORTED_1000baseT_Half)
 102                         adv |= ADVERTISE_1000HALF;
 103                 if (advertise & SUPPORTED_1000baseT_Full)
 104                         adv |= ADVERTISE_1000FULL;
 105         }
 106
 107         if (adv != oldadv)
 108                 changed = 1;
 109
 110         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, adv);
 111         if (err < 0)
 112                 return err;
 113
 114         return changed;
 115 }
 116
 117 /**
 118  * genphy_setup_forced - configures/forces speed/duplex from @phydev
 119  * @phydev: target phy_device struct
 120  *
 121  * Description: Configures MII_BMCR to force speed/duplex
 122  *   to the values in phydev. Assumes that the values are valid.
 123  */
 124 static int genphy_setup_forced(struct phy_device *phydev)
 125 {
 126         int err;
 127         int ctl = BMCR_ANRESTART;
 128
 129         phydev->pause = 0;
 130         phydev->asym_pause = 0;
 131
 132         if (phydev->speed == SPEED_1000)
 133                 ctl |= BMCR_SPEED1000;
 134         else if (phydev->speed == SPEED_100)
 135                 ctl |= BMCR_SPEED100;
 136
 137         if (phydev->duplex == DUPLEX_FULL)
 138                 ctl |= BMCR_FULLDPLX;
 139
 140         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 141
 142         return err;
 143 }
 144
 145 /**
 146  * genphy_restart_aneg - Enable and Restart Autonegotiation
 147  * @phydev: target phy_device struct
 148  */
 149 int genphy_restart_aneg(struct phy_device *phydev)
 150 {
 151         int ctl;
 152
 153         ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 154
 155         if (ctl < 0)
 156                 return ctl;
 157
 158         ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
 159
 160         /* Don't isolate the PHY if we're negotiating */
 161         ctl &= ~(BMCR_ISOLATE);
 162
 163         ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 164
 165         return ctl;
 166 }
 167
 168 /**
 169  * genphy_config_aneg - restart auto-negotiation or write BMCR
 170  * @phydev: target phy_device struct
 171  *
 172  * Description: If auto-negotiation is enabled, we configure the
 173  *   advertising, and then restart auto-negotiation.  If it is not
 174  *   enabled, then we write the BMCR.
 175  */
 176 int genphy_config_aneg(struct phy_device *phydev)
 177 {
 178         int result;
 179
 180         if (phydev->autoneg != AUTONEG_ENABLE)
 181                 return genphy_setup_forced(phydev);
 182
 183         result = genphy_config_advert(phydev);
 184
 185         if (result < 0) /* error */
 186                 return result;
 187
 188         if (result == 0) {
 189                 /*
 190                  * Advertisment hasn't changed, but maybe aneg was never on to
 191                  * begin with?  Or maybe phy was isolated?
 192                  */
 193                 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 194
 195                 if (ctl < 0)
 196                         return ctl;
 197
 198                 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
 199                         result = 1; /* do restart aneg */
 200         }
 201
 202         /*
 203          * Only restart aneg if we are advertising something different
 204          * than we were before.
 205          */
 206         if (result > 0)
 207                 result = genphy_restart_aneg(phydev);
 208
 209         return result;
 210 }
 211
 212 /**
 213  * genphy_update_link - update link status in @phydev
 214  * @phydev: target phy_device struct
 215  *
 216  * Description: Update the value in phydev->link to reflect the
 217  *   current link value.  In order to do this, we need to read
 218  *   the status register twice, keeping the second value.
 219  */
 220 int genphy_update_link(struct phy_device *phydev)
 221 {
 222         unsigned int mii_reg;
 223
 224         /*
 225          * Wait if the link is up, and autonegotiation is in progress
 226          * (ie - we're capable and it's not done)
 227          */
 228         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 229
 230         /*
 231          * If we already saw the link up, and it hasn't gone down, then
 232          * we don't need to wait for autoneg again
 233          */
 234         if (phydev->link && mii_reg & BMSR_LSTATUS)
 235                 return 0;
 236
 237         if ((phydev->autoneg == AUTONEG_ENABLE) &&
 238             !(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 -ETIMEDOUT;
 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->autoneg == AUTONEG_ENABLE) {
 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. ");
 308                                 debug("Ignoring gigabit capability\n");
 309                                 gblpa = 0;
 310                         }
 311                         gblpa &= phy_read(phydev,
 312                                         MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
 313                 }
 314
 315                 /* Set the baseline so we only have to set them
 316                  * if they're different
 317                  */
 318                 phydev->speed = SPEED_10;
 319                 phydev->duplex = DUPLEX_HALF;
 320
 321                 /* Check the gigabit fields */
 322                 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
 323                         phydev->speed = SPEED_1000;
 324
 325                         if (gblpa & PHY_1000BTSR_1000FD)
 326                                 phydev->duplex = DUPLEX_FULL;
 327
 328                         /* We're done! */
 329                         return 0;
 330                 }
 331
 332                 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
 333                 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
 334
 335                 if (lpa & (LPA_100FULL | LPA_100HALF)) {
 336                         phydev->speed = SPEED_100;
 337
 338                         if (lpa & LPA_100FULL)
 339                                 phydev->duplex = DUPLEX_FULL;
 340
 341                 } else if (lpa & LPA_10FULL) {
 342                         phydev->duplex = DUPLEX_FULL;
 343                 }
 344
 345                 /*
 346                  * Extended status may indicate that the PHY supports
 347                  * 1000BASE-T/X even though the 1000BASE-T registers
 348                  * are missing. In this case we can't tell whether the
 349                  * peer also supports it, so we only check extended
 350                  * status if the 1000BASE-T registers are actually
 351                  * missing.
 352                  */
 353                 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
 354                         estatus = phy_read(phydev, MDIO_DEVAD_NONE,
 355                                            MII_ESTATUS);
 356
 357                 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
 358                                 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
 359                         phydev->speed = SPEED_1000;
 360                         if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
 361                                 phydev->duplex = DUPLEX_FULL;
 362                 }
 363
 364         } else {
 365                 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 366
 367                 phydev->speed = SPEED_10;
 368                 phydev->duplex = DUPLEX_HALF;
 369
 370                 if (bmcr & BMCR_FULLDPLX)
 371                         phydev->duplex = DUPLEX_FULL;
 372
 373                 if (bmcr & BMCR_SPEED1000)
 374                         phydev->speed = SPEED_1000;
 375                 else if (bmcr & BMCR_SPEED100)
 376                         phydev->speed = SPEED_100;
 377         }
 378
 379         return 0;
 380 }
 381
 382 int genphy_config(struct phy_device *phydev)
 383 {
 384         int val;
 385         u32 features;
 386
 387         features = (SUPPORTED_TP | SUPPORTED_MII
 388                         | SUPPORTED_AUI | SUPPORTED_FIBRE |
 389                         SUPPORTED_BNC);
 390
 391         /* Do we support autonegotiation? */
 392         val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 393
 394         if (val < 0)
 395                 return val;
 396
 397         if (val & BMSR_ANEGCAPABLE)
 398                 features |= SUPPORTED_Autoneg;
 399
 400         if (val & BMSR_100FULL)
 401                 features |= SUPPORTED_100baseT_Full;
 402         if (val & BMSR_100HALF)
 403                 features |= SUPPORTED_100baseT_Half;
 404         if (val & BMSR_10FULL)
 405                 features |= SUPPORTED_10baseT_Full;
 406         if (val & BMSR_10HALF)
 407                 features |= SUPPORTED_10baseT_Half;
 408
 409         if (val & BMSR_ESTATEN) {
 410                 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
 411
 412                 if (val < 0)
 413                         return val;
 414
 415                 if (val & ESTATUS_1000_TFULL)
 416                         features |= SUPPORTED_1000baseT_Full;
 417                 if (val & ESTATUS_1000_THALF)
 418                         features |= SUPPORTED_1000baseT_Half;
 419                 if (val & ESTATUS_1000_XFULL)
 420                         features |= SUPPORTED_1000baseX_Full;
 421                 if (val & ESTATUS_1000_XHALF)
 422                         features |= SUPPORTED_1000baseX_Half;
 423         }
 424
 425         phydev->supported &= features;
 426         phydev->advertising &= features;
 427
 428         genphy_config_aneg(phydev);
 429
 430         return 0;
 431 }
 432
 433 int genphy_startup(struct phy_device *phydev)
 434 {
 435         int ret;
 436
 437         ret = genphy_update_link(phydev);
 438         if (ret)
 439                 return ret;
 440
 441         return genphy_parse_link(phydev);
 442 }
 443
 444 int genphy_shutdown(struct phy_device *phydev)
 445 {
 446         return 0;
 447 }
 448
 449 static struct phy_driver genphy_driver = {
 450         .uid            = 0xffffffff,
 451         .mask           = 0xffffffff,
 452         .name           = "Generic PHY",
 453         .features       = PHY_GBIT_FEATURES | SUPPORTED_MII |
 454                           SUPPORTED_AUI | SUPPORTED_FIBRE |
 455                           SUPPORTED_BNC,
 456         .config         = genphy_config,
 457         .startup        = genphy_startup,
 458         .shutdown       = genphy_shutdown,
 459 };
 460
 461 static LIST_HEAD(phy_drivers);
 462
 463 int phy_init(void)
 464 {
 465 #ifdef CONFIG_B53_SWITCH
 466         phy_b53_init();
 467 #endif
 468 #ifdef CONFIG_MV88E61XX_SWITCH
 469         phy_mv88e61xx_init();
 470 #endif
 471 #ifdef CONFIG_PHY_AQUANTIA
 472         phy_aquantia_init();
 473 #endif
 474 #ifdef CONFIG_PHY_ATHEROS
 475         phy_atheros_init();
 476 #endif
 477 #ifdef CONFIG_PHY_BROADCOM
 478         phy_broadcom_init();
 479 #endif
 480 #ifdef CONFIG_PHY_CORTINA
 481         phy_cortina_init();
 482 #endif
 483 #ifdef CONFIG_PHY_DAVICOM
 484         phy_davicom_init();
 485 #endif
 486 #ifdef CONFIG_PHY_ET1011C
 487         phy_et1011c_init();
 488 #endif
 489 #ifdef CONFIG_PHY_LXT
 490         phy_lxt_init();
 491 #endif
 492 #ifdef CONFIG_PHY_MARVELL
 493         phy_marvell_init();
 494 #endif
 495 #ifdef CONFIG_PHY_MICREL_KSZ8XXX
 496         phy_micrel_ksz8xxx_init();
 497 #endif
 498 #ifdef CONFIG_PHY_MICREL_KSZ90X1
 499         phy_micrel_ksz90x1_init();
 500 #endif
 501 #ifdef CONFIG_PHY_MESON_GXL
 502         phy_meson_gxl_init();
 503 #endif
 504 #ifdef CONFIG_PHY_NATSEMI
 505         phy_natsemi_init();
 506 #endif
 507 #ifdef CONFIG_PHY_REALTEK
 508         phy_realtek_init();
 509 #endif
 510 #ifdef CONFIG_PHY_SMSC
 511         phy_smsc_init();
 512 #endif
 513 #ifdef CONFIG_PHY_TERANETICS
 514         phy_teranetics_init();
 515 #endif
 516 #ifdef CONFIG_PHY_TI
 517         phy_ti_init();
 518 #endif
 519 #ifdef CONFIG_PHY_VITESSE
 520         phy_vitesse_init();
 521 #endif
 522 #ifdef CONFIG_PHY_XILINX
 523         phy_xilinx_init();
 524 #endif
 525 #ifdef CONFIG_PHY_MSCC
 526         phy_mscc_init();
 527 #endif
 528 #ifdef CONFIG_PHY_FIXED
 529         phy_fixed_init();
 530 #endif
 531         return 0;
 532 }
 533
 534 int phy_register(struct phy_driver *drv)
 535 {
 536         INIT_LIST_HEAD(&drv->list);
 537         list_add_tail(&drv->list, &phy_drivers);
 538
 539 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 540         if (drv->probe)
 541                 drv->probe += gd->reloc_off;
 542         if (drv->config)
 543                 drv->config += gd->reloc_off;
 544         if (drv->startup)
 545                 drv->startup += gd->reloc_off;
 546         if (drv->shutdown)
 547                 drv->shutdown += gd->reloc_off;
 548         if (drv->readext)
 549                 drv->readext += gd->reloc_off;
 550         if (drv->writeext)
 551                 drv->writeext += gd->reloc_off;
 552 #endif
 553         return 0;
 554 }
 555
 556 int phy_set_supported(struct phy_device *phydev, u32 max_speed)
 557 {
 558         /* The default values for phydev->supported are provided by the PHY
 559          * driver "features" member, we want to reset to sane defaults first
 560          * before supporting higher speeds.
 561          */
 562         phydev->supported &= PHY_DEFAULT_FEATURES;
 563
 564         switch (max_speed) {
 565         default:
 566                 return -ENOTSUPP;
 567         case SPEED_1000:
 568                 phydev->supported |= PHY_1000BT_FEATURES;
 569                 /* fall through */
 570         case SPEED_100:
 571                 phydev->supported |= PHY_100BT_FEATURES;
 572                 /* fall through */
 573         case SPEED_10:
 574                 phydev->supported |= PHY_10BT_FEATURES;
 575         }
 576
 577         return 0;
 578 }
 579
 580 static int phy_probe(struct phy_device *phydev)
 581 {
 582         int err = 0;
 583
 584         phydev->advertising = phydev->drv->features;
 585         phydev->supported = phydev->drv->features;
 586
 587         phydev->mmds = phydev->drv->mmds;
 588
 589         if (phydev->drv->probe)
 590                 err = phydev->drv->probe(phydev);
 591
 592         return err;
 593 }
 594
 595 static struct phy_driver *generic_for_interface(phy_interface_t interface)
 596 {
 597 #ifdef CONFIG_PHYLIB_10G
 598         if (is_10g_interface(interface))
 599                 return &gen10g_driver;
 600 #endif
 601
 602         return &genphy_driver;
 603 }
 604
 605 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
 606                                          phy_interface_t interface)
 607 {
 608         struct list_head *entry;
 609         int phy_id = phydev->phy_id;
 610         struct phy_driver *drv = NULL;
 611
 612         list_for_each(entry, &phy_drivers) {
 613                 drv = list_entry(entry, struct phy_driver, list);
 614                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 615                         return drv;
 616         }
 617
 618         /* If we made it here, there's no driver for this PHY */
 619         return generic_for_interface(interface);
 620 }
 621
 622 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 623                                             u32 phy_id,
 624                                             phy_interface_t interface)
 625 {
 626         struct phy_device *dev;
 627
 628         /*
 629          * We allocate the device, and initialize the
 630          * default values
 631          */
 632         dev = malloc(sizeof(*dev));
 633         if (!dev) {
 634                 printf("Failed to allocate PHY device for %s:%d\n",
 635                        bus->name, addr);
 636                 return NULL;
 637         }
 638
 639         memset(dev, 0, sizeof(*dev));
 640
 641         dev->duplex = -1;
 642         dev->link = 0;
 643         dev->interface = interface;
 644
 645 #ifdef CONFIG_DM_ETH
 646         dev->node = ofnode_null();
 647 #endif
 648
 649         dev->autoneg = AUTONEG_ENABLE;
 650
 651         dev->addr = addr;
 652         dev->phy_id = phy_id;
 653         dev->bus = bus;
 654
 655         dev->drv = get_phy_driver(dev, interface);
 656
 657         phy_probe(dev);
 658
 659         bus->phymap[addr] = dev;
 660
 661         return dev;
 662 }
 663
 664 /**
 665  * get_phy_id - reads the specified addr for its ID.
 666  * @bus: the target MII bus
 667  * @addr: PHY address on the MII bus
 668  * @phy_id: where to store the ID retrieved.
 669  *
 670  * Description: Reads the ID registers of the PHY at @addr on the
 671  *   @bus, stores it in @phy_id and returns zero on success.
 672  */
 673 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 674 {
 675         int phy_reg;
 676
 677         /*
 678          * Grab the bits from PHYIR1, and put them
 679          * in the upper half
 680          */
 681         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 682
 683         if (phy_reg < 0)
 684                 return -EIO;
 685
 686         *phy_id = (phy_reg & 0xffff) << 16;
 687
 688         /* Grab the bits from PHYIR2, and put them in the lower half */
 689         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 690
 691         if (phy_reg < 0)
 692                 return -EIO;
 693
 694         *phy_id |= (phy_reg & 0xffff);
 695
 696         return 0;
 697 }
 698
 699 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 700                                              uint phy_mask, int devad,
 701                                              phy_interface_t interface)
 702 {
 703         u32 phy_id = 0xffffffff;
 704
 705         while (phy_mask) {
 706                 int addr = ffs(phy_mask) - 1;
 707                 int r = get_phy_id(bus, addr, devad, &phy_id);
 708                 /* If the PHY ID is mostly f's, we didn't find anything */
 709                 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff)
 710                         return phy_device_create(bus, addr, phy_id, interface);
 711                 phy_mask &= ~(1 << addr);
 712         }
 713         return NULL;
 714 }
 715
 716 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 717                                                   uint phy_mask,
 718                                                   phy_interface_t interface)
 719 {
 720         /* If we have one, return the existing device, with new interface */
 721         while (phy_mask) {
 722                 int addr = ffs(phy_mask) - 1;
 723
 724                 if (bus->phymap[addr]) {
 725                         bus->phymap[addr]->interface = interface;
 726                         return bus->phymap[addr];
 727                 }
 728                 phy_mask &= ~(1 << addr);
 729         }
 730         return NULL;
 731 }
 732
 733 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 734                                                  uint phy_mask,
 735                                                  phy_interface_t interface)
 736 {
 737         int i;
 738         struct phy_device *phydev;
 739
 740         phydev = search_for_existing_phy(bus, phy_mask, interface);
 741         if (phydev)
 742                 return phydev;
 743         /* Try Standard (ie Clause 22) access */
 744         /* Otherwise we have to try Clause 45 */
 745         for (i = 0; i < 5; i++) {
 746                 phydev = create_phy_by_mask(bus, phy_mask,
 747                                             i ? i : MDIO_DEVAD_NONE, interface);
 748                 if (IS_ERR(phydev))
 749                         return NULL;
 750                 if (phydev)
 751                         return phydev;
 752         }
 753
 754         debug("\n%s PHY: ", bus->name);
 755         while (phy_mask) {
 756                 int addr = ffs(phy_mask) - 1;
 757
 758                 debug("%d ", addr);
 759                 phy_mask &= ~(1 << addr);
 760         }
 761         debug("not found\n");
 762
 763         return NULL;
 764 }
 765
 766 /**
 767  * get_phy_device - reads the specified PHY device and returns its
 768  *                  @phy_device struct
 769  * @bus: the target MII bus
 770  * @addr: PHY address on the MII bus
 771  *
 772  * Description: Reads the ID registers of the PHY at @addr on the
 773  *   @bus, then allocates and returns the phy_device to represent it.
 774  */
 775 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
 776                                          phy_interface_t interface)
 777 {
 778         return get_phy_device_by_mask(bus, 1 << addr, interface);
 779 }
 780
 781 int phy_reset(struct phy_device *phydev)
 782 {
 783         int reg;
 784         int timeout = 500;
 785         int devad = MDIO_DEVAD_NONE;
 786
 787         if (phydev->flags & PHY_FLAG_BROKEN_RESET)
 788                 return 0;
 789
 790 #ifdef CONFIG_PHYLIB_10G
 791         /* If it's 10G, we need to issue reset through one of the MMDs */
 792         if (is_10g_interface(phydev->interface)) {
 793                 if (!phydev->mmds)
 794                         gen10g_discover_mmds(phydev);
 795
 796                 devad = ffs(phydev->mmds) - 1;
 797         }
 798 #endif
 799
 800         if (phy_write(phydev, devad, MII_BMCR, BMCR_RESET) < 0) {
 801                 debug("PHY reset failed\n");
 802                 return -1;
 803         }
 804
 805 #ifdef CONFIG_PHY_RESET_DELAY
 806         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 807 #endif
 808         /*
 809          * Poll the control register for the reset bit to go to 0 (it is
 810          * auto-clearing).  This should happen within 0.5 seconds per the
 811          * IEEE spec.
 812          */
 813         reg = phy_read(phydev, devad, MII_BMCR);
 814         while ((reg & BMCR_RESET) && timeout--) {
 815                 reg = phy_read(phydev, devad, MII_BMCR);
 816
 817                 if (reg < 0) {
 818                         debug("PHY status read failed\n");
 819                         return -1;
 820                 }
 821                 udelay(1000);
 822         }
 823
 824         if (reg & BMCR_RESET) {
 825                 puts("PHY reset timed out\n");
 826                 return -1;
 827         }
 828
 829         return 0;
 830 }
 831
 832 int miiphy_reset(const char *devname, unsigned char addr)
 833 {
 834         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 835         struct phy_device *phydev;
 836
 837         /*
 838          * miiphy_reset was only used on standard PHYs, so we'll fake it here.
 839          * If later code tries to connect with the right interface, this will
 840          * be corrected by get_phy_device in phy_connect()
 841          */
 842         phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
 843
 844         return phy_reset(phydev);
 845 }
 846
 847 struct phy_device *phy_find_by_mask(struct mii_dev *bus, uint phy_mask,
 848                                     phy_interface_t interface)
 849 {
 850         /* Reset the bus */
 851         if (bus->reset) {
 852                 bus->reset(bus);
 853
 854                 /* Wait 15ms to make sure the PHY has come out of hard reset */
 855                 mdelay(15);
 856         }
 857
 858         return get_phy_device_by_mask(bus, phy_mask, interface);
 859 }
 860
 861 #ifdef CONFIG_DM_ETH
 862 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev)
 863 #else
 864 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
 865 #endif
 866 {
 867         /* Soft Reset the PHY */
 868         phy_reset(phydev);
 869         if (phydev->dev && phydev->dev != dev) {
 870                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 871                        phydev->bus->name, phydev->addr,
 872                        phydev->dev->name, dev->name);
 873         }
 874         phydev->dev = dev;
 875         debug("%s connected to %s\n", dev->name, phydev->drv->name);
 876 }
 877
 878 #ifdef CONFIG_DM_ETH
 879 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 880                                struct udevice *dev,
 881                                phy_interface_t interface)
 882 #else
 883 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 884                                struct eth_device *dev,
 885                                phy_interface_t interface)
 886 #endif
 887 {
 888         struct phy_device *phydev = NULL;
 889 #ifdef CONFIG_PHY_FIXED
 890         int sn;
 891         const char *name;
 892
 893         sn = fdt_first_subnode(gd->fdt_blob, dev_of_offset(dev));
 894         while (sn > 0) {
 895                 name = fdt_get_name(gd->fdt_blob, sn, NULL);
 896                 if (name && strcmp(name, "fixed-link") == 0) {
 897                         phydev = phy_device_create(bus,
 898                                                    sn, PHY_FIXED_ID, interface);
 899                         break;
 900                 }
 901                 sn = fdt_next_subnode(gd->fdt_blob, sn);
 902         }
 903 #endif
 904         if (!phydev)
 905                 phydev = phy_find_by_mask(bus, 1 << addr, interface);
 906
 907         if (phydev)
 908                 phy_connect_dev(phydev, dev);
 909         else
 910                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
 911         return phydev;
 912 }
 913
 914 /*
 915  * Start the PHY.  Returns 0 on success, or a negative error code.
 916  */
 917 int phy_startup(struct phy_device *phydev)
 918 {
 919         if (phydev->drv->startup)
 920                 return phydev->drv->startup(phydev);
 921
 922         return 0;
 923 }
 924
 925 __weak int board_phy_config(struct phy_device *phydev)
 926 {
 927         if (phydev->drv->config)
 928                 return phydev->drv->config(phydev);
 929         return 0;
 930 }
 931
 932 int phy_config(struct phy_device *phydev)
 933 {
 934         /* Invoke an optional board-specific helper */
 935         return board_phy_config(phydev);
 936 }
 937
 938 int phy_shutdown(struct phy_device *phydev)
 939 {
 940         if (phydev->drv->shutdown)
 941                 phydev->drv->shutdown(phydev);
 942
 943         return 0;
 944 }
 945
 946 int phy_get_interface_by_name(const char *str)
 947 {
 948         int i;
 949
 950         for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) {
 951                 if (!strcmp(str, phy_interface_strings[i]))
 952                         return i;
 953         }
 954
 955         return -1;
 956 }