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 / 50)) {
 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++ % 10) == 0)
 260                                 printf(".");
 261
 262                         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 263                         mdelay(50);     /* 50 ms */
 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 int genphy_init(void)
 462 {
 463         return phy_register(&genphy_driver);
 464 }
 465
 466 static LIST_HEAD(phy_drivers);
 467
 468 int phy_init(void)
 469 {
 470 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 471         /*
 472          * The pointers inside phy_drivers also needs to be updated incase of
 473          * manual reloc, without which these points to some invalid
 474          * pre reloc address and leads to invalid accesses, hangs.
 475          */
 476         struct list_head *head = &phy_drivers;
 477
 478         head->next = (void *)head->next + gd->reloc_off;
 479         head->prev = (void *)head->prev + gd->reloc_off;
 480 #endif
 481
 482 #ifdef CONFIG_B53_SWITCH
 483         phy_b53_init();
 484 #endif
 485 #ifdef CONFIG_MV88E61XX_SWITCH
 486         phy_mv88e61xx_init();
 487 #endif
 488 #ifdef CONFIG_PHY_AQUANTIA
 489         phy_aquantia_init();
 490 #endif
 491 #ifdef CONFIG_PHY_ATHEROS
 492         phy_atheros_init();
 493 #endif
 494 #ifdef CONFIG_PHY_BROADCOM
 495         phy_broadcom_init();
 496 #endif
 497 #ifdef CONFIG_PHY_CORTINA
 498         phy_cortina_init();
 499 #endif
 500 #ifdef CONFIG_PHY_DAVICOM
 501         phy_davicom_init();
 502 #endif
 503 #ifdef CONFIG_PHY_ET1011C
 504         phy_et1011c_init();
 505 #endif
 506 #ifdef CONFIG_PHY_LXT
 507         phy_lxt_init();
 508 #endif
 509 #ifdef CONFIG_PHY_MARVELL
 510         phy_marvell_init();
 511 #endif
 512 #ifdef CONFIG_PHY_MICREL_KSZ8XXX
 513         phy_micrel_ksz8xxx_init();
 514 #endif
 515 #ifdef CONFIG_PHY_MICREL_KSZ90X1
 516         phy_micrel_ksz90x1_init();
 517 #endif
 518 #ifdef CONFIG_PHY_MESON_GXL
 519         phy_meson_gxl_init();
 520 #endif
 521 #ifdef CONFIG_PHY_NATSEMI
 522         phy_natsemi_init();
 523 #endif
 524 #ifdef CONFIG_PHY_REALTEK
 525         phy_realtek_init();
 526 #endif
 527 #ifdef CONFIG_PHY_SMSC
 528         phy_smsc_init();
 529 #endif
 530 #ifdef CONFIG_PHY_TERANETICS
 531         phy_teranetics_init();
 532 #endif
 533 #ifdef CONFIG_PHY_TI
 534         phy_ti_init();
 535 #endif
 536 #ifdef CONFIG_PHY_VITESSE
 537         phy_vitesse_init();
 538 #endif
 539 #ifdef CONFIG_PHY_XILINX
 540         phy_xilinx_init();
 541 #endif
 542 #ifdef CONFIG_PHY_MSCC
 543         phy_mscc_init();
 544 #endif
 545 #ifdef CONFIG_PHY_FIXED
 546         phy_fixed_init();
 547 #endif
 548 #ifdef CONFIG_PHY_NCSI
 549         phy_ncsi_init();
 550 #endif
 551 #ifdef CONFIG_PHY_XILINX_GMII2RGMII
 552         phy_xilinx_gmii2rgmii_init();
 553 #endif
 554         genphy_init();
 555
 556         return 0;
 557 }
 558
 559 int phy_register(struct phy_driver *drv)
 560 {
 561         INIT_LIST_HEAD(&drv->list);
 562         list_add_tail(&drv->list, &phy_drivers);
 563
 564 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 565         if (drv->probe)
 566                 drv->probe += gd->reloc_off;
 567         if (drv->config)
 568                 drv->config += gd->reloc_off;
 569         if (drv->startup)
 570                 drv->startup += gd->reloc_off;
 571         if (drv->shutdown)
 572                 drv->shutdown += gd->reloc_off;
 573         if (drv->readext)
 574                 drv->readext += gd->reloc_off;
 575         if (drv->writeext)
 576                 drv->writeext += gd->reloc_off;
 577         if (drv->read_mmd)
 578                 drv->read_mmd += gd->reloc_off;
 579         if (drv->write_mmd)
 580                 drv->write_mmd += gd->reloc_off;
 581 #endif
 582         return 0;
 583 }
 584
 585 int phy_set_supported(struct phy_device *phydev, u32 max_speed)
 586 {
 587         /* The default values for phydev->supported are provided by the PHY
 588          * driver "features" member, we want to reset to sane defaults first
 589          * before supporting higher speeds.
 590          */
 591         phydev->supported &= PHY_DEFAULT_FEATURES;
 592
 593         switch (max_speed) {
 594         default:
 595                 return -ENOTSUPP;
 596         case SPEED_1000:
 597                 phydev->supported |= PHY_1000BT_FEATURES;
 598                 /* fall through */
 599         case SPEED_100:
 600                 phydev->supported |= PHY_100BT_FEATURES;
 601                 /* fall through */
 602         case SPEED_10:
 603                 phydev->supported |= PHY_10BT_FEATURES;
 604         }
 605
 606         return 0;
 607 }
 608
 609 static int phy_probe(struct phy_device *phydev)
 610 {
 611         int err = 0;
 612
 613         phydev->advertising = phydev->drv->features;
 614         phydev->supported = phydev->drv->features;
 615
 616         phydev->mmds = phydev->drv->mmds;
 617
 618         if (phydev->drv->probe)
 619                 err = phydev->drv->probe(phydev);
 620
 621         return err;
 622 }
 623
 624 static struct phy_driver *generic_for_interface(phy_interface_t interface)
 625 {
 626 #ifdef CONFIG_PHYLIB_10G
 627         if (is_10g_interface(interface))
 628                 return &gen10g_driver;
 629 #endif
 630
 631         return &genphy_driver;
 632 }
 633
 634 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
 635                                          phy_interface_t interface)
 636 {
 637         struct list_head *entry;
 638         int phy_id = phydev->phy_id;
 639         struct phy_driver *drv = NULL;
 640
 641         list_for_each(entry, &phy_drivers) {
 642                 drv = list_entry(entry, struct phy_driver, list);
 643                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 644                         return drv;
 645         }
 646
 647         /* If we made it here, there's no driver for this PHY */
 648         return generic_for_interface(interface);
 649 }
 650
 651 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 652                                             u32 phy_id, bool is_c45,
 653                                             phy_interface_t interface)
 654 {
 655         struct phy_device *dev;
 656
 657         /*
 658          * We allocate the device, and initialize the
 659          * default values
 660          */
 661         dev = malloc(sizeof(*dev));
 662         if (!dev) {
 663                 printf("Failed to allocate PHY device for %s:%d\n",
 664                        bus->name, addr);
 665                 return NULL;
 666         }
 667
 668         memset(dev, 0, sizeof(*dev));
 669
 670         dev->duplex = -1;
 671         dev->link = 0;
 672         dev->interface = interface;
 673
 674 #ifdef CONFIG_DM_ETH
 675         dev->node = ofnode_null();
 676 #endif
 677
 678         dev->autoneg = AUTONEG_ENABLE;
 679
 680         dev->addr = addr;
 681         dev->phy_id = phy_id;
 682         dev->is_c45 = is_c45;
 683         dev->bus = bus;
 684
 685         dev->drv = get_phy_driver(dev, interface);
 686
 687         if (phy_probe(dev)) {
 688                 printf("%s, PHY probe failed\n", __func__);
 689                 return NULL;
 690         }
 691
 692         if (addr >= 0 && addr < PHY_MAX_ADDR)
 693                 bus->phymap[addr] = dev;
 694
 695         return dev;
 696 }
 697
 698 /**
 699  * get_phy_id - reads the specified addr for its ID.
 700  * @bus: the target MII bus
 701  * @addr: PHY address on the MII bus
 702  * @phy_id: where to store the ID retrieved.
 703  *
 704  * Description: Reads the ID registers of the PHY at @addr on the
 705  *   @bus, stores it in @phy_id and returns zero on success.
 706  */
 707 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 708 {
 709         int phy_reg;
 710
 711         /*
 712          * Grab the bits from PHYIR1, and put them
 713          * in the upper half
 714          */
 715         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 716
 717         if (phy_reg < 0)
 718                 return -EIO;
 719
 720         *phy_id = (phy_reg & 0xffff) << 16;
 721
 722         /* Grab the bits from PHYIR2, and put them in the lower half */
 723         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 724
 725         if (phy_reg < 0)
 726                 return -EIO;
 727
 728         *phy_id |= (phy_reg & 0xffff);
 729
 730         return 0;
 731 }
 732
 733 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 734                                              uint phy_mask, int devad,
 735                                              phy_interface_t interface)
 736 {
 737         u32 phy_id = 0xffffffff;
 738         bool is_c45;
 739
 740         while (phy_mask) {
 741                 int addr = ffs(phy_mask) - 1;
 742                 int r = get_phy_id(bus, addr, devad, &phy_id);
 743
 744                 /*
 745                  * If the PHY ID is flat 0 we ignore it.  There are C45 PHYs
 746                  * that return all 0s for C22 reads (like Aquantia AQR112) and
 747                  * there are C22 PHYs that return all 0s for C45 reads (like
 748                  * Atheros AR8035).
 749                  */
 750                 if (r == 0 && phy_id == 0)
 751                         goto next;
 752
 753                 /* If the PHY ID is mostly f's, we didn't find anything */
 754                 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff) {
 755                         is_c45 = (devad == MDIO_DEVAD_NONE) ? false : true;
 756                         return phy_device_create(bus, addr, phy_id, is_c45,
 757                                                  interface);
 758                 }
 759 next:
 760                 phy_mask &= ~(1 << addr);
 761         }
 762         return NULL;
 763 }
 764
 765 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 766                                                   uint phy_mask,
 767                                                   phy_interface_t interface)
 768 {
 769         /* If we have one, return the existing device, with new interface */
 770         while (phy_mask) {
 771                 int addr = ffs(phy_mask) - 1;
 772
 773                 if (bus->phymap[addr]) {
 774                         bus->phymap[addr]->interface = interface;
 775                         return bus->phymap[addr];
 776                 }
 777                 phy_mask &= ~(1 << addr);
 778         }
 779         return NULL;
 780 }
 781
 782 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 783                                                  uint phy_mask,
 784                                                  phy_interface_t interface)
 785 {
 786         int i;
 787         struct phy_device *phydev;
 788
 789         phydev = search_for_existing_phy(bus, phy_mask, interface);
 790         if (phydev)
 791                 return phydev;
 792         /* Try Standard (ie Clause 22) access */
 793         /* Otherwise we have to try Clause 45 */
 794         for (i = 0; i < 5; i++) {
 795                 phydev = create_phy_by_mask(bus, phy_mask,
 796                                             i ? i : MDIO_DEVAD_NONE, interface);
 797                 if (IS_ERR(phydev))
 798                         return NULL;
 799                 if (phydev)
 800                         return phydev;
 801         }
 802
 803         debug("\n%s PHY: ", bus->name);
 804         while (phy_mask) {
 805                 int addr = ffs(phy_mask) - 1;
 806
 807                 debug("%d ", addr);
 808                 phy_mask &= ~(1 << addr);
 809         }
 810         debug("not found\n");
 811
 812         return NULL;
 813 }
 814
 815 /**
 816  * get_phy_device - reads the specified PHY device and returns its
 817  *                  @phy_device struct
 818  * @bus: the target MII bus
 819  * @addr: PHY address on the MII bus
 820  *
 821  * Description: Reads the ID registers of the PHY at @addr on the
 822  *   @bus, then allocates and returns the phy_device to represent it.
 823  */
 824 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
 825                                          phy_interface_t interface)
 826 {
 827         return get_phy_device_by_mask(bus, 1 << addr, interface);
 828 }
 829
 830 int phy_reset(struct phy_device *phydev)
 831 {
 832         int reg;
 833         int timeout = 500;
 834         int devad = MDIO_DEVAD_NONE;
 835
 836         if (phydev->flags & PHY_FLAG_BROKEN_RESET)
 837                 return 0;
 838
 839 #ifdef CONFIG_PHYLIB_10G
 840         /* If it's 10G, we need to issue reset through one of the MMDs */
 841         if (is_10g_interface(phydev->interface)) {
 842                 if (!phydev->mmds)
 843                         gen10g_discover_mmds(phydev);
 844
 845                 devad = ffs(phydev->mmds) - 1;
 846         }
 847 #endif
 848
 849         if (phy_write(phydev, devad, MII_BMCR, BMCR_RESET) < 0) {
 850                 debug("PHY reset failed\n");
 851                 return -1;
 852         }
 853
 854 #ifdef CONFIG_PHY_RESET_DELAY
 855         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 856 #endif
 857         /*
 858          * Poll the control register for the reset bit to go to 0 (it is
 859          * auto-clearing).  This should happen within 0.5 seconds per the
 860          * IEEE spec.
 861          */
 862         reg = phy_read(phydev, devad, MII_BMCR);
 863         while ((reg & BMCR_RESET) && timeout--) {
 864                 reg = phy_read(phydev, devad, MII_BMCR);
 865
 866                 if (reg < 0) {
 867                         debug("PHY status read failed\n");
 868                         return -1;
 869                 }
 870                 udelay(1000);
 871         }
 872
 873         if (reg & BMCR_RESET) {
 874                 puts("PHY reset timed out\n");
 875                 return -1;
 876         }
 877
 878         return 0;
 879 }
 880
 881 int miiphy_reset(const char *devname, unsigned char addr)
 882 {
 883         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 884         struct phy_device *phydev;
 885
 886         /*
 887          * miiphy_reset was only used on standard PHYs, so we'll fake it here.
 888          * If later code tries to connect with the right interface, this will
 889          * be corrected by get_phy_device in phy_connect()
 890          */
 891         phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
 892
 893         return phy_reset(phydev);
 894 }
 895
 896 struct phy_device *phy_find_by_mask(struct mii_dev *bus, uint phy_mask,
 897                                     phy_interface_t interface)
 898 {
 899         /* Reset the bus */
 900         if (bus->reset) {
 901                 bus->reset(bus);
 902
 903                 /* Wait 15ms to make sure the PHY has come out of hard reset */
 904                 mdelay(15);
 905         }
 906
 907         return get_phy_device_by_mask(bus, phy_mask, interface);
 908 }
 909
 910 #ifdef CONFIG_DM_ETH
 911 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev)
 912 #else
 913 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
 914 #endif
 915 {
 916         /* Soft Reset the PHY */
 917         phy_reset(phydev);
 918         if (phydev->dev && phydev->dev != dev) {
 919                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 920                        phydev->bus->name, phydev->addr,
 921                        phydev->dev->name, dev->name);
 922         }
 923         phydev->dev = dev;
 924         debug("%s connected to %s\n", dev->name, phydev->drv->name);
 925 }
 926
 927 #ifdef CONFIG_PHY_XILINX_GMII2RGMII
 928 #ifdef CONFIG_DM_ETH
 929 static struct phy_device *phy_connect_gmii2rgmii(struct mii_dev *bus,
 930                                                  struct udevice *dev,
 931                                                  phy_interface_t interface)
 932 #else
 933 static struct phy_device *phy_connect_gmii2rgmii(struct mii_dev *bus,
 934                                                  struct eth_device *dev,
 935                                                  phy_interface_t interface)
 936 #endif
 937 {
 938         struct phy_device *phydev = NULL;
 939         int sn = dev_of_offset(dev);
 940         int off;
 941
 942         while (sn > 0) {
 943                 off = fdt_node_offset_by_compatible(gd->fdt_blob, sn,
 944                                                     "xlnx,gmii-to-rgmii-1.0");
 945                 if (off > 0) {
 946                         phydev = phy_device_create(bus, off,
 947                                                    PHY_GMII2RGMII_ID, false,
 948                                                    interface);
 949                         break;
 950                 }
 951                 if (off == -FDT_ERR_NOTFOUND)
 952                         sn = fdt_first_subnode(gd->fdt_blob, sn);
 953                 else
 954                         printf("%s: Error finding compat string:%d\n",
 955                                __func__, off);
 956         }
 957
 958         return phydev;
 959 }
 960 #endif
 961
 962 #ifdef CONFIG_PHY_FIXED
 963 #ifdef CONFIG_DM_ETH
 964 static struct phy_device *phy_connect_fixed(struct mii_dev *bus,
 965                                             struct udevice *dev,
 966                                             phy_interface_t interface)
 967 #else
 968 static struct phy_device *phy_connect_fixed(struct mii_dev *bus,
 969                                             struct eth_device *dev,
 970                                             phy_interface_t interface)
 971 #endif
 972 {
 973         struct phy_device *phydev = NULL;
 974         int sn;
 975         const char *name;
 976
 977         sn = fdt_first_subnode(gd->fdt_blob, dev_of_offset(dev));
 978         while (sn > 0) {
 979                 name = fdt_get_name(gd->fdt_blob, sn, NULL);
 980                 if (name && strcmp(name, "fixed-link") == 0) {
 981                         phydev = phy_device_create(bus, sn, PHY_FIXED_ID, false,
 982                                                    interface);
 983                         break;
 984                 }
 985                 sn = fdt_next_subnode(gd->fdt_blob, sn);
 986         }
 987
 988         return phydev;
 989 }
 990 #endif
 991
 992 #ifdef CONFIG_DM_ETH
 993 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 994                                struct udevice *dev,
 995                                phy_interface_t interface)
 996 #else
 997 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 998                                struct eth_device *dev,
 999                                phy_interface_t interface)
1000 #endif
1001 {
1002         struct phy_device *phydev = NULL;
1003         uint mask = (addr >= 0) ? (1 << addr) : 0xffffffff;
1004
1005 #ifdef CONFIG_PHY_FIXED
1006         phydev = phy_connect_fixed(bus, dev, interface);
1007 #endif
1008
1009 #ifdef CONFIG_PHY_NCSI
1010         if (!phydev)
1011                 phydev = phy_device_create(bus, 0, PHY_NCSI_ID, false, interface);
1012 #endif
1013
1014 #ifdef CONFIG_PHY_XILINX_GMII2RGMII
1015         if (!phydev)
1016                 phydev = phy_connect_gmii2rgmii(bus, dev, interface);
1017 #endif
1018
1019         if (!phydev)
1020                 phydev = phy_find_by_mask(bus, mask, interface);
1021
1022         if (phydev)
1023                 phy_connect_dev(phydev, dev);
1024         else
1025                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
1026         return phydev;
1027 }
1028
1029 /*
1030  * Start the PHY.  Returns 0 on success, or a negative error code.
1031  */
1032 int phy_startup(struct phy_device *phydev)
1033 {
1034         if (phydev->drv->startup)
1035                 return phydev->drv->startup(phydev);
1036
1037         return 0;
1038 }
1039
1040 __weak int board_phy_config(struct phy_device *phydev)
1041 {
1042         if (phydev->drv->config)
1043                 return phydev->drv->config(phydev);
1044         return 0;
1045 }
1046
1047 int phy_config(struct phy_device *phydev)
1048 {
1049         /* Invoke an optional board-specific helper */
1050         return board_phy_config(phydev);
1051 }
1052
1053 int phy_shutdown(struct phy_device *phydev)
1054 {
1055         if (phydev->drv->shutdown)
1056                 phydev->drv->shutdown(phydev);
1057
1058         return 0;
1059 }
1060
1061 int phy_get_interface_by_name(const char *str)
1062 {
1063         int i;
1064
1065         for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) {
1066                 if (!strcmp(str, phy_interface_strings[i]))
1067                         return i;
1068         }
1069
1070         return -1;
1071 }