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_NEEDS_MANUAL_RELOC
 466         /*
 467          * The pointers inside phy_drivers also needs to be updated incase of
 468          * manual reloc, without which these points to some invalid
 469          * pre reloc address and leads to invalid accesses, hangs.
 470          */
 471         struct list_head *head = &phy_drivers;
 472
 473         head->next = (void *)head->next + gd->reloc_off;
 474         head->prev = (void *)head->prev + gd->reloc_off;
 475 #endif
 476
 477 #ifdef CONFIG_B53_SWITCH
 478         phy_b53_init();
 479 #endif
 480 #ifdef CONFIG_MV88E61XX_SWITCH
 481         phy_mv88e61xx_init();
 482 #endif
 483 #ifdef CONFIG_PHY_AQUANTIA
 484         phy_aquantia_init();
 485 #endif
 486 #ifdef CONFIG_PHY_ATHEROS
 487         phy_atheros_init();
 488 #endif
 489 #ifdef CONFIG_PHY_BROADCOM
 490         phy_broadcom_init();
 491 #endif
 492 #ifdef CONFIG_PHY_CORTINA
 493         phy_cortina_init();
 494 #endif
 495 #ifdef CONFIG_PHY_DAVICOM
 496         phy_davicom_init();
 497 #endif
 498 #ifdef CONFIG_PHY_ET1011C
 499         phy_et1011c_init();
 500 #endif
 501 #ifdef CONFIG_PHY_LXT
 502         phy_lxt_init();
 503 #endif
 504 #ifdef CONFIG_PHY_MARVELL
 505         phy_marvell_init();
 506 #endif
 507 #ifdef CONFIG_PHY_MICREL_KSZ8XXX
 508         phy_micrel_ksz8xxx_init();
 509 #endif
 510 #ifdef CONFIG_PHY_MICREL_KSZ90X1
 511         phy_micrel_ksz90x1_init();
 512 #endif
 513 #ifdef CONFIG_PHY_MESON_GXL
 514         phy_meson_gxl_init();
 515 #endif
 516 #ifdef CONFIG_PHY_NATSEMI
 517         phy_natsemi_init();
 518 #endif
 519 #ifdef CONFIG_PHY_REALTEK
 520         phy_realtek_init();
 521 #endif
 522 #ifdef CONFIG_PHY_SMSC
 523         phy_smsc_init();
 524 #endif
 525 #ifdef CONFIG_PHY_TERANETICS
 526         phy_teranetics_init();
 527 #endif
 528 #ifdef CONFIG_PHY_TI
 529         phy_ti_init();
 530 #endif
 531 #ifdef CONFIG_PHY_VITESSE
 532         phy_vitesse_init();
 533 #endif
 534 #ifdef CONFIG_PHY_XILINX
 535         phy_xilinx_init();
 536 #endif
 537 #ifdef CONFIG_PHY_MSCC
 538         phy_mscc_init();
 539 #endif
 540 #ifdef CONFIG_PHY_FIXED
 541         phy_fixed_init();
 542 #endif
 543         return 0;
 544 }
 545
 546 int phy_register(struct phy_driver *drv)
 547 {
 548         INIT_LIST_HEAD(&drv->list);
 549         list_add_tail(&drv->list, &phy_drivers);
 550
 551 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 552         if (drv->probe)
 553                 drv->probe += gd->reloc_off;
 554         if (drv->config)
 555                 drv->config += gd->reloc_off;
 556         if (drv->startup)
 557                 drv->startup += gd->reloc_off;
 558         if (drv->shutdown)
 559                 drv->shutdown += gd->reloc_off;
 560         if (drv->readext)
 561                 drv->readext += gd->reloc_off;
 562         if (drv->writeext)
 563                 drv->writeext += gd->reloc_off;
 564         if (drv->read_mmd)
 565                 drv->read_mmd += gd->reloc_off;
 566         if (drv->write_mmd)
 567                 drv->write_mmd += gd->reloc_off;
 568 #endif
 569         return 0;
 570 }
 571
 572 int phy_set_supported(struct phy_device *phydev, u32 max_speed)
 573 {
 574         /* The default values for phydev->supported are provided by the PHY
 575          * driver "features" member, we want to reset to sane defaults first
 576          * before supporting higher speeds.
 577          */
 578         phydev->supported &= PHY_DEFAULT_FEATURES;
 579
 580         switch (max_speed) {
 581         default:
 582                 return -ENOTSUPP;
 583         case SPEED_1000:
 584                 phydev->supported |= PHY_1000BT_FEATURES;
 585                 /* fall through */
 586         case SPEED_100:
 587                 phydev->supported |= PHY_100BT_FEATURES;
 588                 /* fall through */
 589         case SPEED_10:
 590                 phydev->supported |= PHY_10BT_FEATURES;
 591         }
 592
 593         return 0;
 594 }
 595
 596 static int phy_probe(struct phy_device *phydev)
 597 {
 598         int err = 0;
 599
 600         phydev->advertising = phydev->drv->features;
 601         phydev->supported = phydev->drv->features;
 602
 603         phydev->mmds = phydev->drv->mmds;
 604
 605         if (phydev->drv->probe)
 606                 err = phydev->drv->probe(phydev);
 607
 608         return err;
 609 }
 610
 611 static struct phy_driver *generic_for_interface(phy_interface_t interface)
 612 {
 613 #ifdef CONFIG_PHYLIB_10G
 614         if (is_10g_interface(interface))
 615                 return &gen10g_driver;
 616 #endif
 617
 618         return &genphy_driver;
 619 }
 620
 621 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
 622                                          phy_interface_t interface)
 623 {
 624         struct list_head *entry;
 625         int phy_id = phydev->phy_id;
 626         struct phy_driver *drv = NULL;
 627
 628         list_for_each(entry, &phy_drivers) {
 629                 drv = list_entry(entry, struct phy_driver, list);
 630                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 631                         return drv;
 632         }
 633
 634         /* If we made it here, there's no driver for this PHY */
 635         return generic_for_interface(interface);
 636 }
 637
 638 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 639                                             u32 phy_id, bool is_c45,
 640                                             phy_interface_t interface)
 641 {
 642         struct phy_device *dev;
 643
 644         /*
 645          * We allocate the device, and initialize the
 646          * default values
 647          */
 648         dev = malloc(sizeof(*dev));
 649         if (!dev) {
 650                 printf("Failed to allocate PHY device for %s:%d\n",
 651                        bus->name, addr);
 652                 return NULL;
 653         }
 654
 655         memset(dev, 0, sizeof(*dev));
 656
 657         dev->duplex = -1;
 658         dev->link = 0;
 659         dev->interface = interface;
 660
 661 #ifdef CONFIG_DM_ETH
 662         dev->node = ofnode_null();
 663 #endif
 664
 665         dev->autoneg = AUTONEG_ENABLE;
 666
 667         dev->addr = addr;
 668         dev->phy_id = phy_id;
 669         dev->is_c45 = is_c45;
 670         dev->bus = bus;
 671
 672         dev->drv = get_phy_driver(dev, interface);
 673
 674         if (phy_probe(dev)) {
 675                 printf("%s, PHY probe failed\n", __func__);
 676                 return NULL;
 677         }
 678
 679         if (addr >= 0 && addr < PHY_MAX_ADDR)
 680                 bus->phymap[addr] = dev;
 681
 682         return dev;
 683 }
 684
 685 /**
 686  * get_phy_id - reads the specified addr for its ID.
 687  * @bus: the target MII bus
 688  * @addr: PHY address on the MII bus
 689  * @phy_id: where to store the ID retrieved.
 690  *
 691  * Description: Reads the ID registers of the PHY at @addr on the
 692  *   @bus, stores it in @phy_id and returns zero on success.
 693  */
 694 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 695 {
 696         int phy_reg;
 697
 698         /*
 699          * Grab the bits from PHYIR1, and put them
 700          * in the upper half
 701          */
 702         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 703
 704         if (phy_reg < 0)
 705                 return -EIO;
 706
 707         *phy_id = (phy_reg & 0xffff) << 16;
 708
 709         /* Grab the bits from PHYIR2, and put them in the lower half */
 710         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 711
 712         if (phy_reg < 0)
 713                 return -EIO;
 714
 715         *phy_id |= (phy_reg & 0xffff);
 716
 717         return 0;
 718 }
 719
 720 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 721                                              uint phy_mask, int devad,
 722                                              phy_interface_t interface)
 723 {
 724         u32 phy_id = 0xffffffff;
 725         bool is_c45;
 726
 727         while (phy_mask) {
 728                 int addr = ffs(phy_mask) - 1;
 729                 int r = get_phy_id(bus, addr, devad, &phy_id);
 730
 731                 /*
 732                  * If the PHY ID is flat 0 we ignore it.  There are C45 PHYs
 733                  * that return all 0s for C22 reads (like Aquantia AQR112) and
 734                  * there are C22 PHYs that return all 0s for C45 reads (like
 735                  * Atheros AR8035).
 736                  */
 737                 if (r == 0 && phy_id == 0)
 738                         goto next;
 739
 740                 /* If the PHY ID is mostly f's, we didn't find anything */
 741                 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff) {
 742                         is_c45 = (devad == MDIO_DEVAD_NONE) ? false : true;
 743                         return phy_device_create(bus, addr, phy_id, is_c45,
 744                                                  interface);
 745                 }
 746 next:
 747                 phy_mask &= ~(1 << addr);
 748         }
 749         return NULL;
 750 }
 751
 752 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 753                                                   uint phy_mask,
 754                                                   phy_interface_t interface)
 755 {
 756         /* If we have one, return the existing device, with new interface */
 757         while (phy_mask) {
 758                 int addr = ffs(phy_mask) - 1;
 759
 760                 if (bus->phymap[addr]) {
 761                         bus->phymap[addr]->interface = interface;
 762                         return bus->phymap[addr];
 763                 }
 764                 phy_mask &= ~(1 << addr);
 765         }
 766         return NULL;
 767 }
 768
 769 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 770                                                  uint phy_mask,
 771                                                  phy_interface_t interface)
 772 {
 773         int i;
 774         struct phy_device *phydev;
 775
 776         phydev = search_for_existing_phy(bus, phy_mask, interface);
 777         if (phydev)
 778                 return phydev;
 779         /* Try Standard (ie Clause 22) access */
 780         /* Otherwise we have to try Clause 45 */
 781         for (i = 0; i < 5; i++) {
 782                 phydev = create_phy_by_mask(bus, phy_mask,
 783                                             i ? i : MDIO_DEVAD_NONE, interface);
 784                 if (IS_ERR(phydev))
 785                         return NULL;
 786                 if (phydev)
 787                         return phydev;
 788         }
 789
 790         debug("\n%s PHY: ", bus->name);
 791         while (phy_mask) {
 792                 int addr = ffs(phy_mask) - 1;
 793
 794                 debug("%d ", addr);
 795                 phy_mask &= ~(1 << addr);
 796         }
 797         debug("not found\n");
 798
 799         return NULL;
 800 }
 801
 802 /**
 803  * get_phy_device - reads the specified PHY device and returns its
 804  *                  @phy_device struct
 805  * @bus: the target MII bus
 806  * @addr: PHY address on the MII bus
 807  *
 808  * Description: Reads the ID registers of the PHY at @addr on the
 809  *   @bus, then allocates and returns the phy_device to represent it.
 810  */
 811 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
 812                                          phy_interface_t interface)
 813 {
 814         return get_phy_device_by_mask(bus, 1 << addr, interface);
 815 }
 816
 817 int phy_reset(struct phy_device *phydev)
 818 {
 819         int reg;
 820         int timeout = 500;
 821         int devad = MDIO_DEVAD_NONE;
 822
 823         if (phydev->flags & PHY_FLAG_BROKEN_RESET)
 824                 return 0;
 825
 826 #ifdef CONFIG_PHYLIB_10G
 827         /* If it's 10G, we need to issue reset through one of the MMDs */
 828         if (is_10g_interface(phydev->interface)) {
 829                 if (!phydev->mmds)
 830                         gen10g_discover_mmds(phydev);
 831
 832                 devad = ffs(phydev->mmds) - 1;
 833         }
 834 #endif
 835
 836         if (phy_write(phydev, devad, MII_BMCR, BMCR_RESET) < 0) {
 837                 debug("PHY reset failed\n");
 838                 return -1;
 839         }
 840
 841 #ifdef CONFIG_PHY_RESET_DELAY
 842         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 843 #endif
 844         /*
 845          * Poll the control register for the reset bit to go to 0 (it is
 846          * auto-clearing).  This should happen within 0.5 seconds per the
 847          * IEEE spec.
 848          */
 849         reg = phy_read(phydev, devad, MII_BMCR);
 850         while ((reg & BMCR_RESET) && timeout--) {
 851                 reg = phy_read(phydev, devad, MII_BMCR);
 852
 853                 if (reg < 0) {
 854                         debug("PHY status read failed\n");
 855                         return -1;
 856                 }
 857                 udelay(1000);
 858         }
 859
 860         if (reg & BMCR_RESET) {
 861                 puts("PHY reset timed out\n");
 862                 return -1;
 863         }
 864
 865         return 0;
 866 }
 867
 868 int miiphy_reset(const char *devname, unsigned char addr)
 869 {
 870         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 871         struct phy_device *phydev;
 872
 873         /*
 874          * miiphy_reset was only used on standard PHYs, so we'll fake it here.
 875          * If later code tries to connect with the right interface, this will
 876          * be corrected by get_phy_device in phy_connect()
 877          */
 878         phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
 879
 880         return phy_reset(phydev);
 881 }
 882
 883 struct phy_device *phy_find_by_mask(struct mii_dev *bus, uint phy_mask,
 884                                     phy_interface_t interface)
 885 {
 886         /* Reset the bus */
 887         if (bus->reset) {
 888                 bus->reset(bus);
 889
 890                 /* Wait 15ms to make sure the PHY has come out of hard reset */
 891                 mdelay(15);
 892         }
 893
 894         return get_phy_device_by_mask(bus, phy_mask, interface);
 895 }
 896
 897 #ifdef CONFIG_DM_ETH
 898 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev)
 899 #else
 900 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
 901 #endif
 902 {
 903         /* Soft Reset the PHY */
 904         phy_reset(phydev);
 905         if (phydev->dev && phydev->dev != dev) {
 906                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 907                        phydev->bus->name, phydev->addr,
 908                        phydev->dev->name, dev->name);
 909         }
 910         phydev->dev = dev;
 911         debug("%s connected to %s\n", dev->name, phydev->drv->name);
 912 }
 913
 914 #ifdef CONFIG_PHY_FIXED
 915 #ifdef CONFIG_DM_ETH
 916 static struct phy_device *phy_connect_fixed(struct mii_dev *bus,
 917                                             struct udevice *dev,
 918                                             phy_interface_t interface)
 919 #else
 920 static struct phy_device *phy_connect_fixed(struct mii_dev *bus,
 921                                             struct eth_device *dev,
 922                                             phy_interface_t interface)
 923 #endif
 924 {
 925         struct phy_device *phydev = NULL;
 926         int sn;
 927         const char *name;
 928
 929         sn = fdt_first_subnode(gd->fdt_blob, dev_of_offset(dev));
 930         while (sn > 0) {
 931                 name = fdt_get_name(gd->fdt_blob, sn, NULL);
 932                 if (name && strcmp(name, "fixed-link") == 0) {
 933                         phydev = phy_device_create(bus, sn, PHY_FIXED_ID, false,
 934                                                    interface);
 935                         break;
 936                 }
 937                 sn = fdt_next_subnode(gd->fdt_blob, sn);
 938         }
 939
 940         return phydev;
 941 }
 942 #endif
 943
 944 #ifdef CONFIG_DM_ETH
 945 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 946                                struct udevice *dev,
 947                                phy_interface_t interface)
 948 #else
 949 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 950                                struct eth_device *dev,
 951                                phy_interface_t interface)
 952 #endif
 953 {
 954         struct phy_device *phydev = NULL;
 955         uint mask = (addr > 0) ? (1 << addr) : 0xffffffff;
 956
 957 #ifdef CONFIG_PHY_FIXED
 958         phydev = phy_connect_fixed(bus, dev, interface);
 959 #endif
 960
 961         if (!phydev)
 962                 phydev = phy_find_by_mask(bus, mask, interface);
 963
 964         if (phydev)
 965                 phy_connect_dev(phydev, dev);
 966         else
 967                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
 968         return phydev;
 969 }
 970
 971 /*
 972  * Start the PHY.  Returns 0 on success, or a negative error code.
 973  */
 974 int phy_startup(struct phy_device *phydev)
 975 {
 976         if (phydev->drv->startup)
 977                 return phydev->drv->startup(phydev);
 978
 979         return 0;
 980 }
 981
 982 __weak int board_phy_config(struct phy_device *phydev)
 983 {
 984         if (phydev->drv->config)
 985                 return phydev->drv->config(phydev);
 986         return 0;
 987 }
 988
 989 int phy_config(struct phy_device *phydev)
 990 {
 991         /* Invoke an optional board-specific helper */
 992         return board_phy_config(phydev);
 993 }
 994
 995 int phy_shutdown(struct phy_device *phydev)
 996 {
 997         if (phydev->drv->shutdown)
 998                 phydev->drv->shutdown(phydev);
 999
1000         return 0;
1001 }
1002
1003 int phy_get_interface_by_name(const char *str)
1004 {
1005         int i;
1006
1007         for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) {
1008                 if (!strcmp(str, phy_interface_strings[i]))
1009                         return i;
1010         }
1011
1012         return -1;
1013 }