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 <linux/bitops.h>
  21 #include <linux/delay.h>
  22 #include <linux/err.h>
  23 #include <linux/compiler.h>
  24
  25 DECLARE_GLOBAL_DATA_PTR;
  26
  27 /* Generic PHY support and helper functions */
  28
  29 /**
  30  * genphy_config_advert - sanitize and advertise auto-negotiation parameters
  31  * @phydev: target phy_device struct
  32  *
  33  * Description: Writes MII_ADVERTISE with the appropriate values,
  34  *   after sanitizing the values to make sure we only advertise
  35  *   what is supported.  Returns < 0 on error, 0 if the PHY's advertisement
  36  *   hasn't changed, and > 0 if it has changed.
  37  */
  38 static int genphy_config_advert(struct phy_device *phydev)
  39 {
  40         u32 advertise;
  41         int oldadv, adv, bmsr;
  42         int err, changed = 0;
  43
  44         /* Only allow advertising what this PHY supports */
  45         phydev->advertising &= phydev->supported;
  46         advertise = phydev->advertising;
  47
  48         /* Setup standard advertisement */
  49         adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
  50         oldadv = adv;
  51
  52         if (adv < 0)
  53                 return adv;
  54
  55         adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
  56                  ADVERTISE_PAUSE_ASYM);
  57         if (advertise & ADVERTISED_10baseT_Half)
  58                 adv |= ADVERTISE_10HALF;
  59         if (advertise & ADVERTISED_10baseT_Full)
  60                 adv |= ADVERTISE_10FULL;
  61         if (advertise & ADVERTISED_100baseT_Half)
  62                 adv |= ADVERTISE_100HALF;
  63         if (advertise & ADVERTISED_100baseT_Full)
  64                 adv |= ADVERTISE_100FULL;
  65         if (advertise & ADVERTISED_Pause)
  66                 adv |= ADVERTISE_PAUSE_CAP;
  67         if (advertise & ADVERTISED_Asym_Pause)
  68                 adv |= ADVERTISE_PAUSE_ASYM;
  69         if (advertise & ADVERTISED_1000baseX_Half)
  70                 adv |= ADVERTISE_1000XHALF;
  71         if (advertise & ADVERTISED_1000baseX_Full)
  72                 adv |= ADVERTISE_1000XFULL;
  73
  74         if (adv != oldadv) {
  75                 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
  76
  77                 if (err < 0)
  78                         return err;
  79                 changed = 1;
  80         }
  81
  82         bmsr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
  83         if (bmsr < 0)
  84                 return bmsr;
  85
  86         /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
  87          * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
  88          * logical 1.
  89          */
  90         if (!(bmsr & BMSR_ESTATEN))
  91                 return changed;
  92
  93         /* Configure gigabit if it's supported */
  94         adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
  95         oldadv = adv;
  96
  97         if (adv < 0)
  98                 return adv;
  99
 100         adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
 101
 102         if (phydev->supported & (SUPPORTED_1000baseT_Half |
 103                                 SUPPORTED_1000baseT_Full)) {
 104                 if (advertise & SUPPORTED_1000baseT_Half)
 105                         adv |= ADVERTISE_1000HALF;
 106                 if (advertise & SUPPORTED_1000baseT_Full)
 107                         adv |= ADVERTISE_1000FULL;
 108         }
 109
 110         if (adv != oldadv)
 111                 changed = 1;
 112
 113         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, adv);
 114         if (err < 0)
 115                 return err;
 116
 117         return changed;
 118 }
 119
 120 /**
 121  * genphy_setup_forced - configures/forces speed/duplex from @phydev
 122  * @phydev: target phy_device struct
 123  *
 124  * Description: Configures MII_BMCR to force speed/duplex
 125  *   to the values in phydev. Assumes that the values are valid.
 126  */
 127 static int genphy_setup_forced(struct phy_device *phydev)
 128 {
 129         int err;
 130         int ctl = BMCR_ANRESTART;
 131
 132         phydev->pause = 0;
 133         phydev->asym_pause = 0;
 134
 135         if (phydev->speed == SPEED_1000)
 136                 ctl |= BMCR_SPEED1000;
 137         else if (phydev->speed == SPEED_100)
 138                 ctl |= BMCR_SPEED100;
 139
 140         if (phydev->duplex == DUPLEX_FULL)
 141                 ctl |= BMCR_FULLDPLX;
 142
 143         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 144
 145         return err;
 146 }
 147
 148 /**
 149  * genphy_restart_aneg - Enable and Restart Autonegotiation
 150  * @phydev: target phy_device struct
 151  */
 152 int genphy_restart_aneg(struct phy_device *phydev)
 153 {
 154         int ctl;
 155
 156         ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 157
 158         if (ctl < 0)
 159                 return ctl;
 160
 161         ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
 162
 163         /* Don't isolate the PHY if we're negotiating */
 164         ctl &= ~(BMCR_ISOLATE);
 165
 166         ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 167
 168         return ctl;
 169 }
 170
 171 /**
 172  * genphy_config_aneg - restart auto-negotiation or write BMCR
 173  * @phydev: target phy_device struct
 174  *
 175  * Description: If auto-negotiation is enabled, we configure the
 176  *   advertising, and then restart auto-negotiation.  If it is not
 177  *   enabled, then we write the BMCR.
 178  */
 179 int genphy_config_aneg(struct phy_device *phydev)
 180 {
 181         int result;
 182
 183         if (phydev->autoneg != AUTONEG_ENABLE)
 184                 return genphy_setup_forced(phydev);
 185
 186         result = genphy_config_advert(phydev);
 187
 188         if (result < 0) /* error */
 189                 return result;
 190
 191         if (result == 0) {
 192                 /*
 193                  * Advertisment hasn't changed, but maybe aneg was never on to
 194                  * begin with?  Or maybe phy was isolated?
 195                  */
 196                 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 197
 198                 if (ctl < 0)
 199                         return ctl;
 200
 201                 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
 202                         result = 1; /* do restart aneg */
 203         }
 204
 205         /*
 206          * Only restart aneg if we are advertising something different
 207          * than we were before.
 208          */
 209         if (result > 0)
 210                 result = genphy_restart_aneg(phydev);
 211
 212         return result;
 213 }
 214
 215 /**
 216  * genphy_update_link - update link status in @phydev
 217  * @phydev: target phy_device struct
 218  *
 219  * Description: Update the value in phydev->link to reflect the
 220  *   current link value.  In order to do this, we need to read
 221  *   the status register twice, keeping the second value.
 222  */
 223 int genphy_update_link(struct phy_device *phydev)
 224 {
 225         unsigned int mii_reg;
 226
 227         /*
 228          * Wait if the link is up, and autonegotiation is in progress
 229          * (ie - we're capable and it's not done)
 230          */
 231         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 232
 233         /*
 234          * If we already saw the link up, and it hasn't gone down, then
 235          * we don't need to wait for autoneg again
 236          */
 237         if (phydev->link && mii_reg & BMSR_LSTATUS)
 238                 return 0;
 239
 240         if ((phydev->autoneg == AUTONEG_ENABLE) &&
 241             !(mii_reg & BMSR_ANEGCOMPLETE)) {
 242                 int i = 0;
 243
 244                 printf("%s Waiting for PHY auto negotiation to complete",
 245                        phydev->dev->name);
 246                 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
 247                         /*
 248                          * Timeout reached ?
 249                          */
 250                         if (i > (PHY_ANEG_TIMEOUT / 50)) {
 251                                 printf(" TIMEOUT !\n");
 252                                 phydev->link = 0;
 253                                 return -ETIMEDOUT;
 254                         }
 255
 256                         if (ctrlc()) {
 257                                 puts("user interrupt!\n");
 258                                 phydev->link = 0;
 259                                 return -EINTR;
 260                         }
 261
 262                         if ((i++ % 10) == 0)
 263                                 printf(".");
 264
 265                         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 266                         mdelay(50);     /* 50 ms */
 267                 }
 268                 printf(" done\n");
 269                 phydev->link = 1;
 270         } else {
 271                 /* Read the link a second time to clear the latched state */
 272                 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 273
 274                 if (mii_reg & BMSR_LSTATUS)
 275                         phydev->link = 1;
 276                 else
 277                         phydev->link = 0;
 278         }
 279
 280         return 0;
 281 }
 282
 283 /*
 284  * Generic function which updates the speed and duplex.  If
 285  * autonegotiation is enabled, it uses the AND of the link
 286  * partner's advertised capabilities and our advertised
 287  * capabilities.  If autonegotiation is disabled, we use the
 288  * appropriate bits in the control register.
 289  *
 290  * Stolen from Linux's mii.c and phy_device.c
 291  */
 292 int genphy_parse_link(struct phy_device *phydev)
 293 {
 294         int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 295
 296         /* We're using autonegotiation */
 297         if (phydev->autoneg == AUTONEG_ENABLE) {
 298                 u32 lpa = 0;
 299                 int gblpa = 0;
 300                 u32 estatus = 0;
 301
 302                 /* Check for gigabit capability */
 303                 if (phydev->supported & (SUPPORTED_1000baseT_Full |
 304                                         SUPPORTED_1000baseT_Half)) {
 305                         /* We want a list of states supported by
 306                          * both PHYs in the link
 307                          */
 308                         gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
 309                         if (gblpa < 0) {
 310                                 debug("Could not read MII_STAT1000. ");
 311                                 debug("Ignoring gigabit capability\n");
 312                                 gblpa = 0;
 313                         }
 314                         gblpa &= phy_read(phydev,
 315                                         MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
 316                 }
 317
 318                 /* Set the baseline so we only have to set them
 319                  * if they're different
 320                  */
 321                 phydev->speed = SPEED_10;
 322                 phydev->duplex = DUPLEX_HALF;
 323
 324                 /* Check the gigabit fields */
 325                 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
 326                         phydev->speed = SPEED_1000;
 327
 328                         if (gblpa & PHY_1000BTSR_1000FD)
 329                                 phydev->duplex = DUPLEX_FULL;
 330
 331                         /* We're done! */
 332                         return 0;
 333                 }
 334
 335                 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
 336                 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
 337
 338                 if (lpa & (LPA_100FULL | LPA_100HALF)) {
 339                         phydev->speed = SPEED_100;
 340
 341                         if (lpa & LPA_100FULL)
 342                                 phydev->duplex = DUPLEX_FULL;
 343
 344                 } else if (lpa & LPA_10FULL) {
 345                         phydev->duplex = DUPLEX_FULL;
 346                 }
 347
 348                 /*
 349                  * Extended status may indicate that the PHY supports
 350                  * 1000BASE-T/X even though the 1000BASE-T registers
 351                  * are missing. In this case we can't tell whether the
 352                  * peer also supports it, so we only check extended
 353                  * status if the 1000BASE-T registers are actually
 354                  * missing.
 355                  */
 356                 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
 357                         estatus = phy_read(phydev, MDIO_DEVAD_NONE,
 358                                            MII_ESTATUS);
 359
 360                 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
 361                                 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
 362                         phydev->speed = SPEED_1000;
 363                         if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
 364                                 phydev->duplex = DUPLEX_FULL;
 365                 }
 366
 367         } else {
 368                 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 369
 370                 phydev->speed = SPEED_10;
 371                 phydev->duplex = DUPLEX_HALF;
 372
 373                 if (bmcr & BMCR_FULLDPLX)
 374                         phydev->duplex = DUPLEX_FULL;
 375
 376                 if (bmcr & BMCR_SPEED1000)
 377                         phydev->speed = SPEED_1000;
 378                 else if (bmcr & BMCR_SPEED100)
 379                         phydev->speed = SPEED_100;
 380         }
 381
 382         return 0;
 383 }
 384
 385 int genphy_config(struct phy_device *phydev)
 386 {
 387         int val;
 388         u32 features;
 389
 390         features = (SUPPORTED_TP | SUPPORTED_MII
 391                         | SUPPORTED_AUI | SUPPORTED_FIBRE |
 392                         SUPPORTED_BNC);
 393
 394         /* Do we support autonegotiation? */
 395         val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 396
 397         if (val < 0)
 398                 return val;
 399
 400         if (val & BMSR_ANEGCAPABLE)
 401                 features |= SUPPORTED_Autoneg;
 402
 403         if (val & BMSR_100FULL)
 404                 features |= SUPPORTED_100baseT_Full;
 405         if (val & BMSR_100HALF)
 406                 features |= SUPPORTED_100baseT_Half;
 407         if (val & BMSR_10FULL)
 408                 features |= SUPPORTED_10baseT_Full;
 409         if (val & BMSR_10HALF)
 410                 features |= SUPPORTED_10baseT_Half;
 411
 412         if (val & BMSR_ESTATEN) {
 413                 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
 414
 415                 if (val < 0)
 416                         return val;
 417
 418                 if (val & ESTATUS_1000_TFULL)
 419                         features |= SUPPORTED_1000baseT_Full;
 420                 if (val & ESTATUS_1000_THALF)
 421                         features |= SUPPORTED_1000baseT_Half;
 422                 if (val & ESTATUS_1000_XFULL)
 423                         features |= SUPPORTED_1000baseX_Full;
 424                 if (val & ESTATUS_1000_XHALF)
 425                         features |= SUPPORTED_1000baseX_Half;
 426         }
 427
 428         phydev->supported &= features;
 429         phydev->advertising &= features;
 430
 431         genphy_config_aneg(phydev);
 432
 433         return 0;
 434 }
 435
 436 int genphy_startup(struct phy_device *phydev)
 437 {
 438         int ret;
 439
 440         ret = genphy_update_link(phydev);
 441         if (ret)
 442                 return ret;
 443
 444         return genphy_parse_link(phydev);
 445 }
 446
 447 int genphy_shutdown(struct phy_device *phydev)
 448 {
 449         return 0;
 450 }
 451
 452 static struct phy_driver genphy_driver = {
 453         .uid            = 0xffffffff,
 454         .mask           = 0xffffffff,
 455         .name           = "Generic PHY",
 456         .features       = PHY_GBIT_FEATURES | SUPPORTED_MII |
 457                           SUPPORTED_AUI | SUPPORTED_FIBRE |
 458                           SUPPORTED_BNC,
 459         .config         = genphy_config,
 460         .startup        = genphy_startup,
 461         .shutdown       = genphy_shutdown,
 462 };
 463
 464 int genphy_init(void)
 465 {
 466         return phy_register(&genphy_driver);
 467 }
 468
 469 static LIST_HEAD(phy_drivers);
 470
 471 int phy_init(void)
 472 {
 473 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 474         /*
 475          * The pointers inside phy_drivers also needs to be updated incase of
 476          * manual reloc, without which these points to some invalid
 477          * pre reloc address and leads to invalid accesses, hangs.
 478          */
 479         struct list_head *head = &phy_drivers;
 480
 481         head->next = (void *)head->next + gd->reloc_off;
 482         head->prev = (void *)head->prev + gd->reloc_off;
 483 #endif
 484
 485 #ifdef CONFIG_B53_SWITCH
 486         phy_b53_init();
 487 #endif
 488 #ifdef CONFIG_MV88E61XX_SWITCH
 489         phy_mv88e61xx_init();
 490 #endif
 491 #ifdef CONFIG_PHY_AQUANTIA
 492         phy_aquantia_init();
 493 #endif
 494 #ifdef CONFIG_PHY_ATHEROS
 495         phy_atheros_init();
 496 #endif
 497 #ifdef CONFIG_PHY_BROADCOM
 498         phy_broadcom_init();
 499 #endif
 500 #ifdef CONFIG_PHY_CORTINA
 501         phy_cortina_init();
 502 #endif
 503 #ifdef CONFIG_PHY_DAVICOM
 504         phy_davicom_init();
 505 #endif
 506 #ifdef CONFIG_PHY_ET1011C
 507         phy_et1011c_init();
 508 #endif
 509 #ifdef CONFIG_PHY_LXT
 510         phy_lxt_init();
 511 #endif
 512 #ifdef CONFIG_PHY_MARVELL
 513         phy_marvell_init();
 514 #endif
 515 #ifdef CONFIG_PHY_MICREL_KSZ8XXX
 516         phy_micrel_ksz8xxx_init();
 517 #endif
 518 #ifdef CONFIG_PHY_MICREL_KSZ90X1
 519         phy_micrel_ksz90x1_init();
 520 #endif
 521 #ifdef CONFIG_PHY_MESON_GXL
 522         phy_meson_gxl_init();
 523 #endif
 524 #ifdef CONFIG_PHY_NATSEMI
 525         phy_natsemi_init();
 526 #endif
 527 #ifdef CONFIG_PHY_REALTEK
 528         phy_realtek_init();
 529 #endif
 530 #ifdef CONFIG_PHY_SMSC
 531         phy_smsc_init();
 532 #endif
 533 #ifdef CONFIG_PHY_TERANETICS
 534         phy_teranetics_init();
 535 #endif
 536 #ifdef CONFIG_PHY_TI
 537         phy_ti_init();
 538 #endif
 539 #ifdef CONFIG_PHY_VITESSE
 540         phy_vitesse_init();
 541 #endif
 542 #ifdef CONFIG_PHY_XILINX
 543         phy_xilinx_init();
 544 #endif
 545 #ifdef CONFIG_PHY_MSCC
 546         phy_mscc_init();
 547 #endif
 548 #ifdef CONFIG_PHY_FIXED
 549         phy_fixed_init();
 550 #endif
 551 #ifdef CONFIG_PHY_NCSI
 552         phy_ncsi_init();
 553 #endif
 554 #ifdef CONFIG_PHY_XILINX_GMII2RGMII
 555         phy_xilinx_gmii2rgmii_init();
 556 #endif
 557         genphy_init();
 558
 559         return 0;
 560 }
 561
 562 int phy_register(struct phy_driver *drv)
 563 {
 564         INIT_LIST_HEAD(&drv->list);
 565         list_add_tail(&drv->list, &phy_drivers);
 566
 567 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 568         if (drv->probe)
 569                 drv->probe += gd->reloc_off;
 570         if (drv->config)
 571                 drv->config += gd->reloc_off;
 572         if (drv->startup)
 573                 drv->startup += gd->reloc_off;
 574         if (drv->shutdown)
 575                 drv->shutdown += gd->reloc_off;
 576         if (drv->readext)
 577                 drv->readext += gd->reloc_off;
 578         if (drv->writeext)
 579                 drv->writeext += gd->reloc_off;
 580         if (drv->read_mmd)
 581                 drv->read_mmd += gd->reloc_off;
 582         if (drv->write_mmd)
 583                 drv->write_mmd += gd->reloc_off;
 584 #endif
 585         return 0;
 586 }
 587
 588 int phy_set_supported(struct phy_device *phydev, u32 max_speed)
 589 {
 590         /* The default values for phydev->supported are provided by the PHY
 591          * driver "features" member, we want to reset to sane defaults first
 592          * before supporting higher speeds.
 593          */
 594         phydev->supported &= PHY_DEFAULT_FEATURES;
 595
 596         switch (max_speed) {
 597         default:
 598                 return -ENOTSUPP;
 599         case SPEED_1000:
 600                 phydev->supported |= PHY_1000BT_FEATURES;
 601                 /* fall through */
 602         case SPEED_100:
 603                 phydev->supported |= PHY_100BT_FEATURES;
 604                 /* fall through */
 605         case SPEED_10:
 606                 phydev->supported |= PHY_10BT_FEATURES;
 607         }
 608
 609         return 0;
 610 }
 611
 612 static int phy_probe(struct phy_device *phydev)
 613 {
 614         int err = 0;
 615
 616         phydev->advertising = phydev->drv->features;
 617         phydev->supported = phydev->drv->features;
 618
 619         phydev->mmds = phydev->drv->mmds;
 620
 621         if (phydev->drv->probe)
 622                 err = phydev->drv->probe(phydev);
 623
 624         return err;
 625 }
 626
 627 static struct phy_driver *generic_for_interface(phy_interface_t interface)
 628 {
 629 #ifdef CONFIG_PHYLIB_10G
 630         if (is_10g_interface(interface))
 631                 return &gen10g_driver;
 632 #endif
 633
 634         return &genphy_driver;
 635 }
 636
 637 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
 638                                          phy_interface_t interface)
 639 {
 640         struct list_head *entry;
 641         int phy_id = phydev->phy_id;
 642         struct phy_driver *drv = NULL;
 643
 644         list_for_each(entry, &phy_drivers) {
 645                 drv = list_entry(entry, struct phy_driver, list);
 646                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 647                         return drv;
 648         }
 649
 650         /* If we made it here, there's no driver for this PHY */
 651         return generic_for_interface(interface);
 652 }
 653
 654 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 655                                             u32 phy_id, bool is_c45,
 656                                             phy_interface_t interface)
 657 {
 658         struct phy_device *dev;
 659
 660         /*
 661          * We allocate the device, and initialize the
 662          * default values
 663          */
 664         dev = malloc(sizeof(*dev));
 665         if (!dev) {
 666                 printf("Failed to allocate PHY device for %s:%d\n",
 667                        bus->name, addr);
 668                 return NULL;
 669         }
 670
 671         memset(dev, 0, sizeof(*dev));
 672
 673         dev->duplex = -1;
 674         dev->link = 0;
 675         dev->interface = interface;
 676
 677 #ifdef CONFIG_DM_ETH
 678         dev->node = ofnode_null();
 679 #endif
 680
 681         dev->autoneg = AUTONEG_ENABLE;
 682
 683         dev->addr = addr;
 684         dev->phy_id = phy_id;
 685         dev->is_c45 = is_c45;
 686         dev->bus = bus;
 687
 688         dev->drv = get_phy_driver(dev, interface);
 689
 690         if (phy_probe(dev)) {
 691                 printf("%s, PHY probe failed\n", __func__);
 692                 return NULL;
 693         }
 694
 695         if (addr >= 0 && addr < PHY_MAX_ADDR)
 696                 bus->phymap[addr] = dev;
 697
 698         return dev;
 699 }
 700
 701 /**
 702  * get_phy_id - reads the specified addr for its ID.
 703  * @bus: the target MII bus
 704  * @addr: PHY address on the MII bus
 705  * @phy_id: where to store the ID retrieved.
 706  *
 707  * Description: Reads the ID registers of the PHY at @addr on the
 708  *   @bus, stores it in @phy_id and returns zero on success.
 709  */
 710 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 711 {
 712         int phy_reg;
 713
 714         /*
 715          * Grab the bits from PHYIR1, and put them
 716          * in the upper half
 717          */
 718         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 719
 720         if (phy_reg < 0)
 721                 return -EIO;
 722
 723         *phy_id = (phy_reg & 0xffff) << 16;
 724
 725         /* Grab the bits from PHYIR2, and put them in the lower half */
 726         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 727
 728         if (phy_reg < 0)
 729                 return -EIO;
 730
 731         *phy_id |= (phy_reg & 0xffff);
 732
 733         return 0;
 734 }
 735
 736 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 737                                              uint phy_mask, int devad,
 738                                              phy_interface_t interface)
 739 {
 740         u32 phy_id = 0xffffffff;
 741         bool is_c45;
 742
 743         while (phy_mask) {
 744                 int addr = ffs(phy_mask) - 1;
 745                 int r = get_phy_id(bus, addr, devad, &phy_id);
 746
 747                 /*
 748                  * If the PHY ID is flat 0 we ignore it.  There are C45 PHYs
 749                  * that return all 0s for C22 reads (like Aquantia AQR112) and
 750                  * there are C22 PHYs that return all 0s for C45 reads (like
 751                  * Atheros AR8035).
 752                  */
 753                 if (r == 0 && phy_id == 0)
 754                         goto next;
 755
 756                 /* If the PHY ID is mostly f's, we didn't find anything */
 757                 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff) {
 758                         is_c45 = (devad == MDIO_DEVAD_NONE) ? false : true;
 759                         return phy_device_create(bus, addr, phy_id, is_c45,
 760                                                  interface);
 761                 }
 762 next:
 763                 phy_mask &= ~(1 << addr);
 764         }
 765         return NULL;
 766 }
 767
 768 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 769                                                   uint phy_mask,
 770                                                   phy_interface_t interface)
 771 {
 772         /* If we have one, return the existing device, with new interface */
 773         while (phy_mask) {
 774                 int addr = ffs(phy_mask) - 1;
 775
 776                 if (bus->phymap[addr]) {
 777                         bus->phymap[addr]->interface = interface;
 778                         return bus->phymap[addr];
 779                 }
 780                 phy_mask &= ~(1 << addr);
 781         }
 782         return NULL;
 783 }
 784
 785 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 786                                                  uint phy_mask,
 787                                                  phy_interface_t interface)
 788 {
 789         int i;
 790         struct phy_device *phydev;
 791
 792         phydev = search_for_existing_phy(bus, phy_mask, interface);
 793         if (phydev)
 794                 return phydev;
 795         /* Try Standard (ie Clause 22) access */
 796         /* Otherwise we have to try Clause 45 */
 797         for (i = 0; i < 5; i++) {
 798                 phydev = create_phy_by_mask(bus, phy_mask,
 799                                             i ? i : MDIO_DEVAD_NONE, interface);
 800                 if (IS_ERR(phydev))
 801                         return NULL;
 802                 if (phydev)
 803                         return phydev;
 804         }
 805
 806         debug("\n%s PHY: ", bus->name);
 807         while (phy_mask) {
 808                 int addr = ffs(phy_mask) - 1;
 809
 810                 debug("%d ", addr);
 811                 phy_mask &= ~(1 << addr);
 812         }
 813         debug("not found\n");
 814
 815         return NULL;
 816 }
 817
 818 /**
 819  * get_phy_device - reads the specified PHY device and returns its
 820  *                  @phy_device struct
 821  * @bus: the target MII bus
 822  * @addr: PHY address on the MII bus
 823  *
 824  * Description: Reads the ID registers of the PHY at @addr on the
 825  *   @bus, then allocates and returns the phy_device to represent it.
 826  */
 827 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
 828                                          phy_interface_t interface)
 829 {
 830         return get_phy_device_by_mask(bus, 1 << addr, interface);
 831 }
 832
 833 int phy_reset(struct phy_device *phydev)
 834 {
 835         int reg;
 836         int timeout = 500;
 837         int devad = MDIO_DEVAD_NONE;
 838
 839         if (phydev->flags & PHY_FLAG_BROKEN_RESET)
 840                 return 0;
 841
 842 #ifdef CONFIG_PHYLIB_10G
 843         /* If it's 10G, we need to issue reset through one of the MMDs */
 844         if (is_10g_interface(phydev->interface)) {
 845                 if (!phydev->mmds)
 846                         gen10g_discover_mmds(phydev);
 847
 848                 devad = ffs(phydev->mmds) - 1;
 849         }
 850 #endif
 851
 852         if (phy_write(phydev, devad, MII_BMCR, BMCR_RESET) < 0) {
 853                 debug("PHY reset failed\n");
 854                 return -1;
 855         }
 856
 857 #ifdef CONFIG_PHY_RESET_DELAY
 858         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 859 #endif
 860         /*
 861          * Poll the control register for the reset bit to go to 0 (it is
 862          * auto-clearing).  This should happen within 0.5 seconds per the
 863          * IEEE spec.
 864          */
 865         reg = phy_read(phydev, devad, MII_BMCR);
 866         while ((reg & BMCR_RESET) && timeout--) {
 867                 reg = phy_read(phydev, devad, MII_BMCR);
 868
 869                 if (reg < 0) {
 870                         debug("PHY status read failed\n");
 871                         return -1;
 872                 }
 873                 udelay(1000);
 874         }
 875
 876         if (reg & BMCR_RESET) {
 877                 puts("PHY reset timed out\n");
 878                 return -1;
 879         }
 880
 881         return 0;
 882 }
 883
 884 int miiphy_reset(const char *devname, unsigned char addr)
 885 {
 886         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 887         struct phy_device *phydev;
 888
 889         /*
 890          * miiphy_reset was only used on standard PHYs, so we'll fake it here.
 891          * If later code tries to connect with the right interface, this will
 892          * be corrected by get_phy_device in phy_connect()
 893          */
 894         phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
 895
 896         return phy_reset(phydev);
 897 }
 898
 899 struct phy_device *phy_find_by_mask(struct mii_dev *bus, uint phy_mask,
 900                                     phy_interface_t interface)
 901 {
 902         /* Reset the bus */
 903         if (bus->reset) {
 904                 bus->reset(bus);
 905
 906                 /* Wait 15ms to make sure the PHY has come out of hard reset */
 907                 mdelay(15);
 908         }
 909
 910         return get_phy_device_by_mask(bus, phy_mask, interface);
 911 }
 912
 913 #ifdef CONFIG_DM_ETH
 914 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev)
 915 #else
 916 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
 917 #endif
 918 {
 919         /* Soft Reset the PHY */
 920         phy_reset(phydev);
 921         if (phydev->dev && phydev->dev != dev) {
 922                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 923                        phydev->bus->name, phydev->addr,
 924                        phydev->dev->name, dev->name);
 925         }
 926         phydev->dev = dev;
 927         debug("%s connected to %s\n", dev->name, phydev->drv->name);
 928 }
 929
 930 #ifdef CONFIG_PHY_XILINX_GMII2RGMII
 931 #ifdef CONFIG_DM_ETH
 932 static struct phy_device *phy_connect_gmii2rgmii(struct mii_dev *bus,
 933                                                  struct udevice *dev,
 934                                                  phy_interface_t interface)
 935 #else
 936 static struct phy_device *phy_connect_gmii2rgmii(struct mii_dev *bus,
 937                                                  struct eth_device *dev,
 938                                                  phy_interface_t interface)
 939 #endif
 940 {
 941         struct phy_device *phydev = NULL;
 942         int sn = dev_of_offset(dev);
 943         int off;
 944
 945         while (sn > 0) {
 946                 off = fdt_node_offset_by_compatible(gd->fdt_blob, sn,
 947                                                     "xlnx,gmii-to-rgmii-1.0");
 948                 if (off > 0) {
 949                         phydev = phy_device_create(bus, off,
 950                                                    PHY_GMII2RGMII_ID, false,
 951                                                    interface);
 952                         break;
 953                 }
 954                 if (off == -FDT_ERR_NOTFOUND)
 955                         sn = fdt_first_subnode(gd->fdt_blob, sn);
 956                 else
 957                         printf("%s: Error finding compat string:%d\n",
 958                                __func__, off);
 959         }
 960
 961         return phydev;
 962 }
 963 #endif
 964
 965 #ifdef CONFIG_PHY_FIXED
 966 #ifdef CONFIG_DM_ETH
 967 static struct phy_device *phy_connect_fixed(struct mii_dev *bus,
 968                                             struct udevice *dev,
 969                                             phy_interface_t interface)
 970 #else
 971 static struct phy_device *phy_connect_fixed(struct mii_dev *bus,
 972                                             struct eth_device *dev,
 973                                             phy_interface_t interface)
 974 #endif
 975 {
 976         struct phy_device *phydev = NULL;
 977         int sn;
 978         const char *name;
 979
 980         sn = fdt_first_subnode(gd->fdt_blob, dev_of_offset(dev));
 981         while (sn > 0) {
 982                 name = fdt_get_name(gd->fdt_blob, sn, NULL);
 983                 if (name && strcmp(name, "fixed-link") == 0) {
 984                         phydev = phy_device_create(bus, sn, PHY_FIXED_ID, false,
 985                                                    interface);
 986                         break;
 987                 }
 988                 sn = fdt_next_subnode(gd->fdt_blob, sn);
 989         }
 990
 991         return phydev;
 992 }
 993 #endif
 994
 995 #ifdef CONFIG_DM_ETH
 996 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 997                                struct udevice *dev,
 998                                phy_interface_t interface)
 999 #else
1000 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
1001                                struct eth_device *dev,
1002                                phy_interface_t interface)
1003 #endif
1004 {
1005         struct phy_device *phydev = NULL;
1006         uint mask = (addr >= 0) ? (1 << addr) : 0xffffffff;
1007
1008 #ifdef CONFIG_PHY_FIXED
1009         phydev = phy_connect_fixed(bus, dev, interface);
1010 #endif
1011
1012 #ifdef CONFIG_PHY_NCSI
1013         if (!phydev)
1014                 phydev = phy_device_create(bus, 0, PHY_NCSI_ID, false, interface);
1015 #endif
1016
1017 #ifdef CONFIG_PHY_XILINX_GMII2RGMII
1018         if (!phydev)
1019                 phydev = phy_connect_gmii2rgmii(bus, dev, interface);
1020 #endif
1021
1022         if (!phydev)
1023                 phydev = phy_find_by_mask(bus, mask, interface);
1024
1025         if (phydev)
1026                 phy_connect_dev(phydev, dev);
1027         else
1028                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
1029         return phydev;
1030 }
1031
1032 /*
1033  * Start the PHY.  Returns 0 on success, or a negative error code.
1034  */
1035 int phy_startup(struct phy_device *phydev)
1036 {
1037         if (phydev->drv->startup)
1038                 return phydev->drv->startup(phydev);
1039
1040         return 0;
1041 }
1042
1043 __weak int board_phy_config(struct phy_device *phydev)
1044 {
1045         if (phydev->drv->config)
1046                 return phydev->drv->config(phydev);
1047         return 0;
1048 }
1049
1050 int phy_config(struct phy_device *phydev)
1051 {
1052         /* Invoke an optional board-specific helper */
1053         return board_phy_config(phydev);
1054 }
1055
1056 int phy_shutdown(struct phy_device *phydev)
1057 {
1058         if (phydev->drv->shutdown)
1059                 phydev->drv->shutdown(phydev);
1060
1061         return 0;
1062 }
1063
1064 int phy_get_interface_by_name(const char *str)
1065 {
1066         int i;
1067
1068         for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) {
1069                 if (!strcmp(str, phy_interface_strings[i]))
1070                         return i;
1071         }
1072
1073         return -1;
1074 }