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 <log.h>
  14 #include <malloc.h>
  15 #include <net.h>
  16 #include <command.h>
  17 #include <miiphy.h>
  18 #include <phy.h>
  19 #include <errno.h>
  20 #include <asm/global_data.h>
  21 #include <dm/of_extra.h>
  22 #include <linux/bitops.h>
  23 #include <linux/delay.h>
  24 #include <linux/err.h>
  25 #include <linux/compiler.h>
  26
  27 DECLARE_GLOBAL_DATA_PTR;
  28
  29 /* Generic PHY support and helper functions */
  30
  31 /**
  32  * genphy_config_advert - sanitize and advertise auto-negotiation parameters
  33  * @phydev: target phy_device struct
  34  *
  35  * Description: Writes MII_ADVERTISE with the appropriate values,
  36  *   after sanitizing the values to make sure we only advertise
  37  *   what is supported.  Returns < 0 on error, 0 if the PHY's advertisement
  38  *   hasn't changed, and > 0 if it has changed.
  39  */
  40 static int genphy_config_advert(struct phy_device *phydev)
  41 {
  42         u32 advertise;
  43         int oldadv, adv, bmsr;
  44         int err, changed = 0;
  45
  46         /* Only allow advertising what this PHY supports */
  47         phydev->advertising &= phydev->supported;
  48         advertise = phydev->advertising;
  49
  50         /* Setup standard advertisement */
  51         adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
  52         oldadv = adv;
  53
  54         if (adv < 0)
  55                 return adv;
  56
  57         adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
  58                  ADVERTISE_PAUSE_ASYM);
  59         if (advertise & ADVERTISED_10baseT_Half)
  60                 adv |= ADVERTISE_10HALF;
  61         if (advertise & ADVERTISED_10baseT_Full)
  62                 adv |= ADVERTISE_10FULL;
  63         if (advertise & ADVERTISED_100baseT_Half)
  64                 adv |= ADVERTISE_100HALF;
  65         if (advertise & ADVERTISED_100baseT_Full)
  66                 adv |= ADVERTISE_100FULL;
  67         if (advertise & ADVERTISED_Pause)
  68                 adv |= ADVERTISE_PAUSE_CAP;
  69         if (advertise & ADVERTISED_Asym_Pause)
  70                 adv |= ADVERTISE_PAUSE_ASYM;
  71         if (advertise & ADVERTISED_1000baseX_Half)
  72                 adv |= ADVERTISE_1000XHALF;
  73         if (advertise & ADVERTISED_1000baseX_Full)
  74                 adv |= ADVERTISE_1000XFULL;
  75
  76         if (adv != oldadv) {
  77                 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
  78
  79                 if (err < 0)
  80                         return err;
  81                 changed = 1;
  82         }
  83
  84         bmsr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
  85         if (bmsr < 0)
  86                 return bmsr;
  87
  88         /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
  89          * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
  90          * logical 1.
  91          */
  92         if (!(bmsr & BMSR_ESTATEN))
  93                 return changed;
  94
  95         /* Configure gigabit if it's supported */
  96         adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
  97         oldadv = adv;
  98
  99         if (adv < 0)
 100                 return adv;
 101
 102         adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
 103
 104         if (phydev->supported & (SUPPORTED_1000baseT_Half |
 105                                 SUPPORTED_1000baseT_Full)) {
 106                 if (advertise & SUPPORTED_1000baseT_Half)
 107                         adv |= ADVERTISE_1000HALF;
 108                 if (advertise & SUPPORTED_1000baseT_Full)
 109                         adv |= ADVERTISE_1000FULL;
 110         }
 111
 112         if (adv != oldadv)
 113                 changed = 1;
 114
 115         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, adv);
 116         if (err < 0)
 117                 return err;
 118
 119         return changed;
 120 }
 121
 122 /**
 123  * genphy_setup_forced - configures/forces speed/duplex from @phydev
 124  * @phydev: target phy_device struct
 125  *
 126  * Description: Configures MII_BMCR to force speed/duplex
 127  *   to the values in phydev. Assumes that the values are valid.
 128  */
 129 static int genphy_setup_forced(struct phy_device *phydev)
 130 {
 131         int err;
 132         int ctl = BMCR_ANRESTART;
 133
 134         phydev->pause = 0;
 135         phydev->asym_pause = 0;
 136
 137         if (phydev->speed == SPEED_1000)
 138                 ctl |= BMCR_SPEED1000;
 139         else if (phydev->speed == SPEED_100)
 140                 ctl |= BMCR_SPEED100;
 141
 142         if (phydev->duplex == DUPLEX_FULL)
 143                 ctl |= BMCR_FULLDPLX;
 144
 145         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 146
 147         return err;
 148 }
 149
 150 /**
 151  * genphy_restart_aneg - Enable and Restart Autonegotiation
 152  * @phydev: target phy_device struct
 153  */
 154 int genphy_restart_aneg(struct phy_device *phydev)
 155 {
 156         int ctl;
 157
 158         ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 159
 160         if (ctl < 0)
 161                 return ctl;
 162
 163         ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
 164
 165         /* Don't isolate the PHY if we're negotiating */
 166         ctl &= ~(BMCR_ISOLATE);
 167
 168         ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 169
 170         return ctl;
 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 (phydev->autoneg != AUTONEG_ENABLE)
 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                 /*
 195                  * Advertisment hasn't changed, but maybe aneg was never on to
 196                  * begin with?  Or maybe phy was isolated?
 197                  */
 198                 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 199
 200                 if (ctl < 0)
 201                         return ctl;
 202
 203                 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
 204                         result = 1; /* do restart aneg */
 205         }
 206
 207         /*
 208          * Only restart aneg if we are advertising something different
 209          * than we were before.
 210          */
 211         if (result > 0)
 212                 result = genphy_restart_aneg(phydev);
 213
 214         return result;
 215 }
 216
 217 /**
 218  * genphy_update_link - update link status in @phydev
 219  * @phydev: target phy_device struct
 220  *
 221  * Description: Update the value in phydev->link to reflect the
 222  *   current link value.  In order to do this, we need to read
 223  *   the status register twice, keeping the second value.
 224  */
 225 int genphy_update_link(struct phy_device *phydev)
 226 {
 227         unsigned int mii_reg;
 228
 229         /*
 230          * Wait if the link is up, and autonegotiation is in progress
 231          * (ie - we're capable and it's not done)
 232          */
 233         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 234
 235         /*
 236          * If we already saw the link up, and it hasn't gone down, then
 237          * we don't need to wait for autoneg again
 238          */
 239         if (phydev->link && mii_reg & BMSR_LSTATUS)
 240                 return 0;
 241
 242         if ((phydev->autoneg == AUTONEG_ENABLE) &&
 243             !(mii_reg & BMSR_ANEGCOMPLETE)) {
 244                 int i = 0;
 245
 246                 printf("%s Waiting for PHY auto negotiation to complete",
 247                        phydev->dev->name);
 248                 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
 249                         /*
 250                          * Timeout reached ?
 251                          */
 252                         if (i > (PHY_ANEG_TIMEOUT / 50)) {
 253                                 printf(" TIMEOUT !\n");
 254                                 phydev->link = 0;
 255                                 return -ETIMEDOUT;
 256                         }
 257
 258                         if (ctrlc()) {
 259                                 puts("user interrupt!\n");
 260                                 phydev->link = 0;
 261                                 return -EINTR;
 262                         }
 263
 264                         if ((i++ % 10) == 0)
 265                                 printf(".");
 266
 267                         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 268                         mdelay(50);     /* 50 ms */
 269                 }
 270                 printf(" done\n");
 271                 phydev->link = 1;
 272         } else {
 273                 /* Read the link a second time to clear the latched state */
 274                 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 275
 276                 if (mii_reg & BMSR_LSTATUS)
 277                         phydev->link = 1;
 278                 else
 279                         phydev->link = 0;
 280         }
 281
 282         return 0;
 283 }
 284
 285 /*
 286  * Generic function which updates the speed and duplex.  If
 287  * autonegotiation is enabled, it uses the AND of the link
 288  * partner's advertised capabilities and our advertised
 289  * capabilities.  If autonegotiation is disabled, we use the
 290  * appropriate bits in the control register.
 291  *
 292  * Stolen from Linux's mii.c and phy_device.c
 293  */
 294 int genphy_parse_link(struct phy_device *phydev)
 295 {
 296         int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 297
 298         /* We're using autonegotiation */
 299         if (phydev->autoneg == AUTONEG_ENABLE) {
 300                 u32 lpa = 0;
 301                 int gblpa = 0;
 302                 u32 estatus = 0;
 303
 304                 /* Check for gigabit capability */
 305                 if (phydev->supported & (SUPPORTED_1000baseT_Full |
 306                                         SUPPORTED_1000baseT_Half)) {
 307                         /* We want a list of states supported by
 308                          * both PHYs in the link
 309                          */
 310                         gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
 311                         if (gblpa < 0) {
 312                                 debug("Could not read MII_STAT1000. ");
 313                                 debug("Ignoring gigabit capability\n");
 314                                 gblpa = 0;
 315                         }
 316                         gblpa &= phy_read(phydev,
 317                                         MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
 318                 }
 319
 320                 /* Set the baseline so we only have to set them
 321                  * if they're different
 322                  */
 323                 phydev->speed = SPEED_10;
 324                 phydev->duplex = DUPLEX_HALF;
 325
 326                 /* Check the gigabit fields */
 327                 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
 328                         phydev->speed = SPEED_1000;
 329
 330                         if (gblpa & PHY_1000BTSR_1000FD)
 331                                 phydev->duplex = DUPLEX_FULL;
 332
 333                         /* We're done! */
 334                         return 0;
 335                 }
 336
 337                 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
 338                 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
 339
 340                 if (lpa & (LPA_100FULL | LPA_100HALF)) {
 341                         phydev->speed = SPEED_100;
 342
 343                         if (lpa & LPA_100FULL)
 344                                 phydev->duplex = DUPLEX_FULL;
 345
 346                 } else if (lpa & LPA_10FULL) {
 347                         phydev->duplex = DUPLEX_FULL;
 348                 }
 349
 350                 /*
 351                  * Extended status may indicate that the PHY supports
 352                  * 1000BASE-T/X even though the 1000BASE-T registers
 353                  * are missing. In this case we can't tell whether the
 354                  * peer also supports it, so we only check extended
 355                  * status if the 1000BASE-T registers are actually
 356                  * missing.
 357                  */
 358                 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
 359                         estatus = phy_read(phydev, MDIO_DEVAD_NONE,
 360                                            MII_ESTATUS);
 361
 362                 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
 363                                 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
 364                         phydev->speed = SPEED_1000;
 365                         if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
 366                                 phydev->duplex = DUPLEX_FULL;
 367                 }
 368
 369         } else {
 370                 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 371
 372                 phydev->speed = SPEED_10;
 373                 phydev->duplex = DUPLEX_HALF;
 374
 375                 if (bmcr & BMCR_FULLDPLX)
 376                         phydev->duplex = DUPLEX_FULL;
 377
 378                 if (bmcr & BMCR_SPEED1000)
 379                         phydev->speed = SPEED_1000;
 380                 else if (bmcr & BMCR_SPEED100)
 381                         phydev->speed = SPEED_100;
 382         }
 383
 384         return 0;
 385 }
 386
 387 int genphy_config(struct phy_device *phydev)
 388 {
 389         int val;
 390         u32 features;
 391
 392         features = (SUPPORTED_TP | SUPPORTED_MII
 393                         | SUPPORTED_AUI | SUPPORTED_FIBRE |
 394                         SUPPORTED_BNC);
 395
 396         /* Do we support autonegotiation? */
 397         val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 398
 399         if (val < 0)
 400                 return val;
 401
 402         if (val & BMSR_ANEGCAPABLE)
 403                 features |= SUPPORTED_Autoneg;
 404
 405         if (val & BMSR_100FULL)
 406                 features |= SUPPORTED_100baseT_Full;
 407         if (val & BMSR_100HALF)
 408                 features |= SUPPORTED_100baseT_Half;
 409         if (val & BMSR_10FULL)
 410                 features |= SUPPORTED_10baseT_Full;
 411         if (val & BMSR_10HALF)
 412                 features |= SUPPORTED_10baseT_Half;
 413
 414         if (val & BMSR_ESTATEN) {
 415                 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
 416
 417                 if (val < 0)
 418                         return val;
 419
 420                 if (val & ESTATUS_1000_TFULL)
 421                         features |= SUPPORTED_1000baseT_Full;
 422                 if (val & ESTATUS_1000_THALF)
 423                         features |= SUPPORTED_1000baseT_Half;
 424                 if (val & ESTATUS_1000_XFULL)
 425                         features |= SUPPORTED_1000baseX_Full;
 426                 if (val & ESTATUS_1000_XHALF)
 427                         features |= SUPPORTED_1000baseX_Half;
 428         }
 429
 430         phydev->supported &= features;
 431         phydev->advertising &= features;
 432
 433         genphy_config_aneg(phydev);
 434
 435         return 0;
 436 }
 437
 438 int genphy_startup(struct phy_device *phydev)
 439 {
 440         int ret;
 441
 442         ret = genphy_update_link(phydev);
 443         if (ret)
 444                 return ret;
 445
 446         return genphy_parse_link(phydev);
 447 }
 448
 449 int genphy_shutdown(struct phy_device *phydev)
 450 {
 451         return 0;
 452 }
 453
 454 static struct phy_driver genphy_driver = {
 455         .uid            = 0xffffffff,
 456         .mask           = 0xffffffff,
 457         .name           = "Generic PHY",
 458         .features       = PHY_GBIT_FEATURES | SUPPORTED_MII |
 459                           SUPPORTED_AUI | SUPPORTED_FIBRE |
 460                           SUPPORTED_BNC,
 461         .config         = genphy_config,
 462         .startup        = genphy_startup,
 463         .shutdown       = genphy_shutdown,
 464 };
 465
 466 static int genphy_init(void)
 467 {
 468         return phy_register(&genphy_driver);
 469 }
 470
 471 static LIST_HEAD(phy_drivers);
 472
 473 int phy_init(void)
 474 {
 475 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 476         /*
 477          * The pointers inside phy_drivers also needs to be updated incase of
 478          * manual reloc, without which these points to some invalid
 479          * pre reloc address and leads to invalid accesses, hangs.
 480          */
 481         struct list_head *head = &phy_drivers;
 482
 483         head->next = (void *)head->next + gd->reloc_off;
 484         head->prev = (void *)head->prev + gd->reloc_off;
 485 #endif
 486
 487 #ifdef CONFIG_B53_SWITCH
 488         phy_b53_init();
 489 #endif
 490 #ifdef CONFIG_MV88E61XX_SWITCH
 491         phy_mv88e61xx_init();
 492 #endif
 493 #ifdef CONFIG_PHY_ADIN
 494         phy_adin_init();
 495 #endif
 496 #ifdef CONFIG_PHY_AQUANTIA
 497         phy_aquantia_init();
 498 #endif
 499 #ifdef CONFIG_PHY_ATHEROS
 500         phy_atheros_init();
 501 #endif
 502 #ifdef CONFIG_PHY_BROADCOM
 503         phy_broadcom_init();
 504 #endif
 505 #ifdef CONFIG_PHY_CORTINA
 506         phy_cortina_init();
 507 #endif
 508 #ifdef CONFIG_PHY_CORTINA_ACCESS
 509         phy_cortina_access_init();
 510 #endif
 511 #ifdef CONFIG_PHY_DAVICOM
 512         phy_davicom_init();
 513 #endif
 514 #ifdef CONFIG_PHY_ET1011C
 515         phy_et1011c_init();
 516 #endif
 517 #ifdef CONFIG_PHY_LXT
 518         phy_lxt_init();
 519 #endif
 520 #ifdef CONFIG_PHY_MARVELL
 521         phy_marvell_init();
 522 #endif
 523 #ifdef CONFIG_PHY_MICREL_KSZ8XXX
 524         phy_micrel_ksz8xxx_init();
 525 #endif
 526 #ifdef CONFIG_PHY_MICREL_KSZ90X1
 527         phy_micrel_ksz90x1_init();
 528 #endif
 529 #ifdef CONFIG_PHY_MESON_GXL
 530         phy_meson_gxl_init();
 531 #endif
 532 #ifdef CONFIG_PHY_NATSEMI
 533         phy_natsemi_init();
 534 #endif
 535 #ifdef CONFIG_NXP_C45_TJA11XX_PHY
 536         phy_nxp_tja11xx_init();
 537 #endif
 538 #ifdef CONFIG_PHY_REALTEK
 539         phy_realtek_init();
 540 #endif
 541 #ifdef CONFIG_PHY_SMSC
 542         phy_smsc_init();
 543 #endif
 544 #ifdef CONFIG_PHY_TERANETICS
 545         phy_teranetics_init();
 546 #endif
 547 #ifdef CONFIG_PHY_TI
 548         phy_ti_init();
 549 #endif
 550 #ifdef CONFIG_PHY_VITESSE
 551         phy_vitesse_init();
 552 #endif
 553 #ifdef CONFIG_PHY_XILINX
 554         phy_xilinx_init();
 555 #endif
 556 #ifdef CONFIG_PHY_MSCC
 557         phy_mscc_init();
 558 #endif
 559 #ifdef CONFIG_PHY_FIXED
 560         phy_fixed_init();
 561 #endif
 562 #ifdef CONFIG_PHY_NCSI
 563         phy_ncsi_init();
 564 #endif
 565 #ifdef CONFIG_PHY_XILINX_GMII2RGMII
 566         phy_xilinx_gmii2rgmii_init();
 567 #endif
 568         genphy_init();
 569
 570         return 0;
 571 }
 572
 573 int phy_register(struct phy_driver *drv)
 574 {
 575         INIT_LIST_HEAD(&drv->list);
 576         list_add_tail(&drv->list, &phy_drivers);
 577
 578 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 579         if (drv->probe)
 580                 drv->probe += gd->reloc_off;
 581         if (drv->config)
 582                 drv->config += gd->reloc_off;
 583         if (drv->startup)
 584                 drv->startup += gd->reloc_off;
 585         if (drv->shutdown)
 586                 drv->shutdown += gd->reloc_off;
 587         if (drv->readext)
 588                 drv->readext += gd->reloc_off;
 589         if (drv->writeext)
 590                 drv->writeext += gd->reloc_off;
 591         if (drv->read_mmd)
 592                 drv->read_mmd += gd->reloc_off;
 593         if (drv->write_mmd)
 594                 drv->write_mmd += gd->reloc_off;
 595 #endif
 596         return 0;
 597 }
 598
 599 int phy_set_supported(struct phy_device *phydev, u32 max_speed)
 600 {
 601         /* The default values for phydev->supported are provided by the PHY
 602          * driver "features" member, we want to reset to sane defaults first
 603          * before supporting higher speeds.
 604          */
 605         phydev->supported &= PHY_DEFAULT_FEATURES;
 606
 607         switch (max_speed) {
 608         default:
 609                 return -ENOTSUPP;
 610         case SPEED_1000:
 611                 phydev->supported |= PHY_1000BT_FEATURES;
 612                 /* fall through */
 613         case SPEED_100:
 614                 phydev->supported |= PHY_100BT_FEATURES;
 615                 /* fall through */
 616         case SPEED_10:
 617                 phydev->supported |= PHY_10BT_FEATURES;
 618         }
 619
 620         return 0;
 621 }
 622
 623 static int phy_probe(struct phy_device *phydev)
 624 {
 625         int err = 0;
 626
 627         phydev->advertising = phydev->drv->features;
 628         phydev->supported = phydev->drv->features;
 629
 630         phydev->mmds = phydev->drv->mmds;
 631
 632         if (phydev->drv->probe)
 633                 err = phydev->drv->probe(phydev);
 634
 635         return err;
 636 }
 637
 638 static struct phy_driver *generic_for_phy(struct phy_device *phydev)
 639 {
 640 #ifdef CONFIG_PHYLIB_10G
 641         if (phydev->is_c45)
 642                 return &gen10g_driver;
 643 #endif
 644
 645         return &genphy_driver;
 646 }
 647
 648 static struct phy_driver *get_phy_driver(struct phy_device *phydev)
 649 {
 650         struct list_head *entry;
 651         int phy_id = phydev->phy_id;
 652         struct phy_driver *drv = NULL;
 653
 654         list_for_each(entry, &phy_drivers) {
 655                 drv = list_entry(entry, struct phy_driver, list);
 656                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 657                         return drv;
 658         }
 659
 660         /* If we made it here, there's no driver for this PHY */
 661         return generic_for_phy(phydev);
 662 }
 663
 664 struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 665                                      u32 phy_id, bool is_c45)
 666 {
 667         struct phy_device *dev;
 668
 669         /*
 670          * We allocate the device, and initialize the
 671          * default values
 672          */
 673         dev = malloc(sizeof(*dev));
 674         if (!dev) {
 675                 printf("Failed to allocate PHY device for %s:%d\n",
 676                        bus ? bus->name : "(null bus)", addr);
 677                 return NULL;
 678         }
 679
 680         memset(dev, 0, sizeof(*dev));
 681
 682         dev->duplex = -1;
 683         dev->link = 0;
 684         dev->interface = PHY_INTERFACE_MODE_NA;
 685
 686 #ifdef CONFIG_DM_ETH
 687         dev->node = ofnode_null();
 688 #endif
 689
 690         dev->autoneg = AUTONEG_ENABLE;
 691
 692         dev->addr = addr;
 693         dev->phy_id = phy_id;
 694         dev->is_c45 = is_c45;
 695         dev->bus = bus;
 696
 697         dev->drv = get_phy_driver(dev);
 698
 699         if (phy_probe(dev)) {
 700                 printf("%s, PHY probe failed\n", __func__);
 701                 return NULL;
 702         }
 703
 704         if (addr >= 0 && addr < PHY_MAX_ADDR && phy_id != PHY_FIXED_ID)
 705                 bus->phymap[addr] = dev;
 706
 707         return dev;
 708 }
 709
 710 /**
 711  * get_phy_id - reads the specified addr for its ID.
 712  * @bus: the target MII bus
 713  * @addr: PHY address on the MII bus
 714  * @phy_id: where to store the ID retrieved.
 715  *
 716  * Description: Reads the ID registers of the PHY at @addr on the
 717  *   @bus, stores it in @phy_id and returns zero on success.
 718  */
 719 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 720 {
 721         int phy_reg;
 722
 723         /*
 724          * Grab the bits from PHYIR1, and put them
 725          * in the upper half
 726          */
 727         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 728
 729         if (phy_reg < 0)
 730                 return -EIO;
 731
 732         *phy_id = (phy_reg & 0xffff) << 16;
 733
 734         /* Grab the bits from PHYIR2, and put them in the lower half */
 735         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 736
 737         if (phy_reg < 0)
 738                 return -EIO;
 739
 740         *phy_id |= (phy_reg & 0xffff);
 741
 742         return 0;
 743 }
 744
 745 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 746                                              uint phy_mask, int devad)
 747 {
 748         u32 phy_id = 0xffffffff;
 749         bool is_c45;
 750
 751         while (phy_mask) {
 752                 int addr = ffs(phy_mask) - 1;
 753                 int r = get_phy_id(bus, addr, devad, &phy_id);
 754
 755                 /*
 756                  * If the PHY ID is flat 0 we ignore it.  There are C45 PHYs
 757                  * that return all 0s for C22 reads (like Aquantia AQR112) and
 758                  * there are C22 PHYs that return all 0s for C45 reads (like
 759                  * Atheros AR8035).
 760                  */
 761                 if (r == 0 && phy_id == 0)
 762                         goto next;
 763
 764                 /* If the PHY ID is mostly f's, we didn't find anything */
 765                 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff) {
 766                         is_c45 = (devad == MDIO_DEVAD_NONE) ? false : true;
 767                         return phy_device_create(bus, addr, phy_id, is_c45);
 768                 }
 769 next:
 770                 phy_mask &= ~(1 << addr);
 771         }
 772         return NULL;
 773 }
 774
 775 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 776                                                   uint phy_mask)
 777 {
 778         /* If we have one, return the existing device, with new interface */
 779         while (phy_mask) {
 780                 int addr = ffs(phy_mask) - 1;
 781
 782                 if (bus->phymap[addr])
 783                         return bus->phymap[addr];
 784
 785                 phy_mask &= ~(1 << addr);
 786         }
 787         return NULL;
 788 }
 789
 790 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 791                                                  uint phy_mask)
 792 {
 793         struct phy_device *phydev;
 794         int devad[] = {
 795                 /* Clause-22 */
 796                 MDIO_DEVAD_NONE,
 797                 /* Clause-45 */
 798                 MDIO_MMD_PMAPMD,
 799                 MDIO_MMD_WIS,
 800                 MDIO_MMD_PCS,
 801                 MDIO_MMD_PHYXS,
 802                 MDIO_MMD_VEND1,
 803         };
 804         int i, devad_cnt;
 805
 806         devad_cnt = sizeof(devad)/sizeof(int);
 807         phydev = search_for_existing_phy(bus, phy_mask);
 808         if (phydev)
 809                 return phydev;
 810         /* try different access clauses  */
 811         for (i = 0; i < devad_cnt; i++) {
 812                 phydev = create_phy_by_mask(bus, phy_mask, devad[i]);
 813                 if (IS_ERR(phydev))
 814                         return NULL;
 815                 if (phydev)
 816                         return phydev;
 817         }
 818
 819         debug("\n%s PHY: ", bus->name);
 820         while (phy_mask) {
 821                 int addr = ffs(phy_mask) - 1;
 822
 823                 debug("%d ", addr);
 824                 phy_mask &= ~(1 << addr);
 825         }
 826         debug("not found\n");
 827
 828         return NULL;
 829 }
 830
 831 /**
 832  * get_phy_device - reads the specified PHY device and returns its
 833  *                  @phy_device struct
 834  * @bus: the target MII bus
 835  * @addr: PHY address on the MII bus
 836  *
 837  * Description: Reads the ID registers of the PHY at @addr on the
 838  *   @bus, then allocates and returns the phy_device to represent it.
 839  */
 840 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr)
 841 {
 842         return get_phy_device_by_mask(bus, 1 << addr);
 843 }
 844
 845 int phy_reset(struct phy_device *phydev)
 846 {
 847         int reg;
 848         int timeout = 500;
 849         int devad = MDIO_DEVAD_NONE;
 850
 851         if (phydev->flags & PHY_FLAG_BROKEN_RESET)
 852                 return 0;
 853
 854 #ifdef CONFIG_PHYLIB_10G
 855         /* If it's 10G, we need to issue reset through one of the MMDs */
 856         if (phydev->is_c45) {
 857                 if (!phydev->mmds)
 858                         gen10g_discover_mmds(phydev);
 859
 860                 devad = ffs(phydev->mmds) - 1;
 861         }
 862 #endif
 863
 864         if (phy_write(phydev, devad, MII_BMCR, BMCR_RESET) < 0) {
 865                 debug("PHY reset failed\n");
 866                 return -1;
 867         }
 868
 869 #if CONFIG_PHY_RESET_DELAY > 0
 870         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 871 #endif
 872         /*
 873          * Poll the control register for the reset bit to go to 0 (it is
 874          * auto-clearing).  This should happen within 0.5 seconds per the
 875          * IEEE spec.
 876          */
 877         reg = phy_read(phydev, devad, MII_BMCR);
 878         while ((reg & BMCR_RESET) && timeout--) {
 879                 reg = phy_read(phydev, devad, MII_BMCR);
 880
 881                 if (reg < 0) {
 882                         debug("PHY status read failed\n");
 883                         return -1;
 884                 }
 885                 udelay(1000);
 886         }
 887
 888         if (reg & BMCR_RESET) {
 889                 puts("PHY reset timed out\n");
 890                 return -1;
 891         }
 892
 893         return 0;
 894 }
 895
 896 int miiphy_reset(const char *devname, unsigned char addr)
 897 {
 898         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 899         struct phy_device *phydev;
 900
 901         phydev = get_phy_device(bus, addr);
 902
 903         return phy_reset(phydev);
 904 }
 905
 906 struct phy_device *phy_find_by_mask(struct mii_dev *bus, uint phy_mask)
 907 {
 908         /* Reset the bus */
 909         if (bus->reset) {
 910                 bus->reset(bus);
 911
 912                 /* Wait 15ms to make sure the PHY has come out of hard reset */
 913                 mdelay(15);
 914         }
 915
 916         return get_phy_device_by_mask(bus, phy_mask);
 917 }
 918
 919 #ifdef CONFIG_DM_ETH
 920 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev,
 921                      phy_interface_t interface)
 922 #else
 923 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev,
 924                      phy_interface_t interface)
 925 #endif
 926 {
 927         /* Soft Reset the PHY */
 928         phy_reset(phydev);
 929         if (phydev->dev && phydev->dev != dev) {
 930                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 931                        phydev->bus->name, phydev->addr,
 932                        phydev->dev->name, dev->name);
 933         }
 934         phydev->dev = dev;
 935         phydev->interface = interface;
 936         debug("%s connected to %s mode %s\n", dev->name, phydev->drv->name,
 937               phy_string_for_interface(interface));
 938 }
 939
 940 #ifdef CONFIG_PHY_XILINX_GMII2RGMII
 941 static struct phy_device *phy_connect_gmii2rgmii(struct mii_dev *bus,
 942                                                  struct udevice *dev)
 943 {
 944         struct phy_device *phydev = NULL;
 945         ofnode node;
 946
 947         ofnode_for_each_subnode(node, dev_ofnode(dev)) {
 948                 node = ofnode_by_compatible(node, "xlnx,gmii-to-rgmii-1.0");
 949                 if (ofnode_valid(node)) {
 950                         phydev = phy_device_create(bus, 0,
 951                                                    PHY_GMII2RGMII_ID, false);
 952                         if (phydev)
 953                                 phydev->node = node;
 954                         break;
 955                 }
 956
 957                 node = ofnode_first_subnode(node);
 958         }
 959
 960         return phydev;
 961 }
 962 #endif
 963
 964 #ifdef CONFIG_PHY_FIXED
 965 /**
 966  * fixed_phy_create() - create an unconnected fixed-link pseudo-PHY device
 967  * @node: OF node for the container of the fixed-link node
 968  *
 969  * Description: Creates a struct phy_device based on a fixed-link of_node
 970  * description. Can be used without phy_connect by drivers which do not expose
 971  * a UCLASS_ETH udevice.
 972  */
 973 struct phy_device *fixed_phy_create(ofnode node)
 974 {
 975         struct phy_device *phydev;
 976         ofnode subnode;
 977
 978         subnode = ofnode_find_subnode(node, "fixed-link");
 979         if (!ofnode_valid(subnode)) {
 980                 return NULL;
 981         }
 982
 983         phydev = phy_device_create(NULL, 0, PHY_FIXED_ID, false);
 984         if (phydev)
 985                 phydev->node = subnode;
 986
 987         phydev->interface = ofnode_read_phy_mode(node);
 988
 989         return phydev;
 990 }
 991
 992 static struct phy_device *phy_connect_fixed(struct mii_dev *bus,
 993                                             struct udevice *dev)
 994 {
 995         ofnode node = dev_ofnode(dev), subnode;
 996         struct phy_device *phydev = NULL;
 997
 998         if (ofnode_phy_is_fixed_link(node, &subnode)) {
 999                 phydev = phy_device_create(bus, 0, PHY_FIXED_ID, false);
1000                 if (phydev)
1001                         phydev->node = subnode;
1002         }
1003
1004         return phydev;
1005 }
1006 #endif
1007
1008 #ifdef CONFIG_DM_ETH
1009 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
1010                                struct udevice *dev,
1011                                phy_interface_t interface)
1012 #else
1013 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
1014                                struct eth_device *dev,
1015                                phy_interface_t interface)
1016 #endif
1017 {
1018         struct phy_device *phydev = NULL;
1019         uint mask = (addr >= 0) ? (1 << addr) : 0xffffffff;
1020
1021 #ifdef CONFIG_PHY_FIXED
1022         phydev = phy_connect_fixed(bus, dev);
1023 #endif
1024
1025 #ifdef CONFIG_PHY_NCSI
1026         if (!phydev)
1027                 phydev = phy_device_create(bus, 0, PHY_NCSI_ID, false);
1028 #endif
1029
1030 #ifdef CONFIG_PHY_ETHERNET_ID
1031         if (!phydev)
1032                 phydev = phy_connect_phy_id(bus, dev);
1033 #endif
1034
1035 #ifdef CONFIG_PHY_XILINX_GMII2RGMII
1036         if (!phydev)
1037                 phydev = phy_connect_gmii2rgmii(bus, dev);
1038 #endif
1039
1040         if (!phydev)
1041                 phydev = phy_find_by_mask(bus, mask);
1042
1043         if (phydev)
1044                 phy_connect_dev(phydev, dev, interface);
1045         else
1046                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
1047         return phydev;
1048 }
1049
1050 /*
1051  * Start the PHY.  Returns 0 on success, or a negative error code.
1052  */
1053 int phy_startup(struct phy_device *phydev)
1054 {
1055         if (phydev->drv->startup)
1056                 return phydev->drv->startup(phydev);
1057
1058         return 0;
1059 }
1060
1061 __weak int board_phy_config(struct phy_device *phydev)
1062 {
1063         if (phydev->drv->config)
1064                 return phydev->drv->config(phydev);
1065         return 0;
1066 }
1067
1068 int phy_config(struct phy_device *phydev)
1069 {
1070         /* Invoke an optional board-specific helper */
1071         return board_phy_config(phydev);
1072 }
1073
1074 int phy_shutdown(struct phy_device *phydev)
1075 {
1076         if (phydev->drv->shutdown)
1077                 phydev->drv->shutdown(phydev);
1078
1079         return 0;
1080 }