git.sur5r.net Git - u-boot/blob - drivers/net/phy/phy.c

   1 /*
   2  * Generic PHY Management code
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  *
   6  * Copyright 2011 Freescale Semiconductor, Inc.
   7  * author Andy Fleming
   8  *
   9  * Based loosely off of Linux's PHY Lib
  10  */
  11
  12 #include <config.h>
  13 #include <common.h>
  14 #include <console.h>
  15 #include <dm.h>
  16 #include <malloc.h>
  17 #include <net.h>
  18 #include <command.h>
  19 #include <miiphy.h>
  20 #include <phy.h>
  21 #include <errno.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) {
 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++ % 500) == 0)
 263                                 printf(".");
 264
 265                         udelay(1000);   /* 1 ms */
 266                         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 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 static LIST_HEAD(phy_drivers);
 465
 466 int phy_init(void)
 467 {
 468 #ifdef CONFIG_B53_SWITCH
 469         phy_b53_init();
 470 #endif
 471 #ifdef CONFIG_MV88E61XX_SWITCH
 472         phy_mv88e61xx_init();
 473 #endif
 474 #ifdef CONFIG_PHY_AQUANTIA
 475         phy_aquantia_init();
 476 #endif
 477 #ifdef CONFIG_PHY_ATHEROS
 478         phy_atheros_init();
 479 #endif
 480 #ifdef CONFIG_PHY_BROADCOM
 481         phy_broadcom_init();
 482 #endif
 483 #ifdef CONFIG_PHY_CORTINA
 484         phy_cortina_init();
 485 #endif
 486 #ifdef CONFIG_PHY_DAVICOM
 487         phy_davicom_init();
 488 #endif
 489 #ifdef CONFIG_PHY_ET1011C
 490         phy_et1011c_init();
 491 #endif
 492 #ifdef CONFIG_PHY_LXT
 493         phy_lxt_init();
 494 #endif
 495 #ifdef CONFIG_PHY_MARVELL
 496         phy_marvell_init();
 497 #endif
 498 #ifdef CONFIG_PHY_MICREL_KSZ8XXX
 499         phy_micrel_ksz8xxx_init();
 500 #endif
 501 #ifdef CONFIG_PHY_MICREL_KSZ90X1
 502         phy_micrel_ksz90x1_init();
 503 #endif
 504 #ifdef CONFIG_PHY_MESON_GXL
 505         phy_meson_gxl_init();
 506 #endif
 507 #ifdef CONFIG_PHY_NATSEMI
 508         phy_natsemi_init();
 509 #endif
 510 #ifdef CONFIG_PHY_REALTEK
 511         phy_realtek_init();
 512 #endif
 513 #ifdef CONFIG_PHY_SMSC
 514         phy_smsc_init();
 515 #endif
 516 #ifdef CONFIG_PHY_TERANETICS
 517         phy_teranetics_init();
 518 #endif
 519 #ifdef CONFIG_PHY_TI
 520         phy_ti_init();
 521 #endif
 522 #ifdef CONFIG_PHY_VITESSE
 523         phy_vitesse_init();
 524 #endif
 525 #ifdef CONFIG_PHY_XILINX
 526         phy_xilinx_init();
 527 #endif
 528 #ifdef CONFIG_PHY_MSCC
 529         phy_mscc_init();
 530 #endif
 531 #ifdef CONFIG_PHY_FIXED
 532         phy_fixed_init();
 533 #endif
 534         return 0;
 535 }
 536
 537 int phy_register(struct phy_driver *drv)
 538 {
 539         INIT_LIST_HEAD(&drv->list);
 540         list_add_tail(&drv->list, &phy_drivers);
 541
 542 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 543         if (drv->probe)
 544                 drv->probe += gd->reloc_off;
 545         if (drv->config)
 546                 drv->config += gd->reloc_off;
 547         if (drv->startup)
 548                 drv->startup += gd->reloc_off;
 549         if (drv->shutdown)
 550                 drv->shutdown += gd->reloc_off;
 551         if (drv->readext)
 552                 drv->readext += gd->reloc_off;
 553         if (drv->writeext)
 554                 drv->writeext += gd->reloc_off;
 555 #endif
 556         return 0;
 557 }
 558
 559 int phy_set_supported(struct phy_device *phydev, u32 max_speed)
 560 {
 561         /* The default values for phydev->supported are provided by the PHY
 562          * driver "features" member, we want to reset to sane defaults first
 563          * before supporting higher speeds.
 564          */
 565         phydev->supported &= PHY_DEFAULT_FEATURES;
 566
 567         switch (max_speed) {
 568         default:
 569                 return -ENOTSUPP;
 570         case SPEED_1000:
 571                 phydev->supported |= PHY_1000BT_FEATURES;
 572                 /* fall through */
 573         case SPEED_100:
 574                 phydev->supported |= PHY_100BT_FEATURES;
 575                 /* fall through */
 576         case SPEED_10:
 577                 phydev->supported |= PHY_10BT_FEATURES;
 578         }
 579
 580         return 0;
 581 }
 582
 583 static int phy_probe(struct phy_device *phydev)
 584 {
 585         int err = 0;
 586
 587         phydev->advertising = phydev->drv->features;
 588         phydev->supported = phydev->drv->features;
 589
 590         phydev->mmds = phydev->drv->mmds;
 591
 592         if (phydev->drv->probe)
 593                 err = phydev->drv->probe(phydev);
 594
 595         return err;
 596 }
 597
 598 static struct phy_driver *generic_for_interface(phy_interface_t interface)
 599 {
 600 #ifdef CONFIG_PHYLIB_10G
 601         if (is_10g_interface(interface))
 602                 return &gen10g_driver;
 603 #endif
 604
 605         return &genphy_driver;
 606 }
 607
 608 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
 609                                          phy_interface_t interface)
 610 {
 611         struct list_head *entry;
 612         int phy_id = phydev->phy_id;
 613         struct phy_driver *drv = NULL;
 614
 615         list_for_each(entry, &phy_drivers) {
 616                 drv = list_entry(entry, struct phy_driver, list);
 617                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 618                         return drv;
 619         }
 620
 621         /* If we made it here, there's no driver for this PHY */
 622         return generic_for_interface(interface);
 623 }
 624
 625 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 626                                             u32 phy_id,
 627                                             phy_interface_t interface)
 628 {
 629         struct phy_device *dev;
 630
 631         /*
 632          * We allocate the device, and initialize the
 633          * default values
 634          */
 635         dev = malloc(sizeof(*dev));
 636         if (!dev) {
 637                 printf("Failed to allocate PHY device for %s:%d\n",
 638                        bus->name, addr);
 639                 return NULL;
 640         }
 641
 642         memset(dev, 0, sizeof(*dev));
 643
 644         dev->duplex = -1;
 645         dev->link = 0;
 646         dev->interface = interface;
 647
 648         dev->autoneg = AUTONEG_ENABLE;
 649
 650         dev->addr = addr;
 651         dev->phy_id = phy_id;
 652         dev->bus = bus;
 653
 654         dev->drv = get_phy_driver(dev, interface);
 655
 656         phy_probe(dev);
 657
 658         bus->phymap[addr] = dev;
 659
 660         return dev;
 661 }
 662
 663 /**
 664  * get_phy_id - reads the specified addr for its ID.
 665  * @bus: the target MII bus
 666  * @addr: PHY address on the MII bus
 667  * @phy_id: where to store the ID retrieved.
 668  *
 669  * Description: Reads the ID registers of the PHY at @addr on the
 670  *   @bus, stores it in @phy_id and returns zero on success.
 671  */
 672 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 673 {
 674         int phy_reg;
 675
 676         /*
 677          * Grab the bits from PHYIR1, and put them
 678          * in the upper half
 679          */
 680         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 681
 682         if (phy_reg < 0)
 683                 return -EIO;
 684
 685         *phy_id = (phy_reg & 0xffff) << 16;
 686
 687         /* Grab the bits from PHYIR2, and put them in the lower half */
 688         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 689
 690         if (phy_reg < 0)
 691                 return -EIO;
 692
 693         *phy_id |= (phy_reg & 0xffff);
 694
 695         return 0;
 696 }
 697
 698 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 699                                              uint phy_mask, int devad,
 700                                              phy_interface_t interface)
 701 {
 702         u32 phy_id = 0xffffffff;
 703
 704         while (phy_mask) {
 705                 int addr = ffs(phy_mask) - 1;
 706                 int r = get_phy_id(bus, addr, devad, &phy_id);
 707                 /* If the PHY ID is mostly f's, we didn't find anything */
 708                 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff)
 709                         return phy_device_create(bus, addr, phy_id, interface);
 710                 phy_mask &= ~(1 << addr);
 711         }
 712         return NULL;
 713 }
 714
 715 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 716                                                   uint phy_mask,
 717                                                   phy_interface_t interface)
 718 {
 719         /* If we have one, return the existing device, with new interface */
 720         while (phy_mask) {
 721                 int addr = ffs(phy_mask) - 1;
 722
 723                 if (bus->phymap[addr]) {
 724                         bus->phymap[addr]->interface = interface;
 725                         return bus->phymap[addr];
 726                 }
 727                 phy_mask &= ~(1 << addr);
 728         }
 729         return NULL;
 730 }
 731
 732 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 733                                                  uint phy_mask,
 734                                                  phy_interface_t interface)
 735 {
 736         int i;
 737         struct phy_device *phydev;
 738
 739         phydev = search_for_existing_phy(bus, phy_mask, interface);
 740         if (phydev)
 741                 return phydev;
 742         /* Try Standard (ie Clause 22) access */
 743         /* Otherwise we have to try Clause 45 */
 744         for (i = 0; i < 5; i++) {
 745                 phydev = create_phy_by_mask(bus, phy_mask,
 746                                             i ? i : MDIO_DEVAD_NONE, interface);
 747                 if (IS_ERR(phydev))
 748                         return NULL;
 749                 if (phydev)
 750                         return phydev;
 751         }
 752
 753         debug("\n%s PHY: ", bus->name);
 754         while (phy_mask) {
 755                 int addr = ffs(phy_mask) - 1;
 756
 757                 debug("%d ", addr);
 758                 phy_mask &= ~(1 << addr);
 759         }
 760         debug("not found\n");
 761
 762         return NULL;
 763 }
 764
 765 /**
 766  * get_phy_device - reads the specified PHY device and returns its
 767  *                  @phy_device struct
 768  * @bus: the target MII bus
 769  * @addr: PHY address on the MII bus
 770  *
 771  * Description: Reads the ID registers of the PHY at @addr on the
 772  *   @bus, then allocates and returns the phy_device to represent it.
 773  */
 774 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
 775                                          phy_interface_t interface)
 776 {
 777         return get_phy_device_by_mask(bus, 1 << addr, interface);
 778 }
 779
 780 int phy_reset(struct phy_device *phydev)
 781 {
 782         int reg;
 783         int timeout = 500;
 784         int devad = MDIO_DEVAD_NONE;
 785
 786         if (phydev->flags & PHY_FLAG_BROKEN_RESET)
 787                 return 0;
 788
 789 #ifdef CONFIG_PHYLIB_10G
 790         /* If it's 10G, we need to issue reset through one of the MMDs */
 791         if (is_10g_interface(phydev->interface)) {
 792                 if (!phydev->mmds)
 793                         gen10g_discover_mmds(phydev);
 794
 795                 devad = ffs(phydev->mmds) - 1;
 796         }
 797 #endif
 798
 799         if (phy_write(phydev, devad, MII_BMCR, BMCR_RESET) < 0) {
 800                 debug("PHY reset failed\n");
 801                 return -1;
 802         }
 803
 804 #ifdef CONFIG_PHY_RESET_DELAY
 805         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 806 #endif
 807         /*
 808          * Poll the control register for the reset bit to go to 0 (it is
 809          * auto-clearing).  This should happen within 0.5 seconds per the
 810          * IEEE spec.
 811          */
 812         reg = phy_read(phydev, devad, MII_BMCR);
 813         while ((reg & BMCR_RESET) && timeout--) {
 814                 reg = phy_read(phydev, devad, MII_BMCR);
 815
 816                 if (reg < 0) {
 817                         debug("PHY status read failed\n");
 818                         return -1;
 819                 }
 820                 udelay(1000);
 821         }
 822
 823         if (reg & BMCR_RESET) {
 824                 puts("PHY reset timed out\n");
 825                 return -1;
 826         }
 827
 828         return 0;
 829 }
 830
 831 int miiphy_reset(const char *devname, unsigned char addr)
 832 {
 833         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 834         struct phy_device *phydev;
 835
 836         /*
 837          * miiphy_reset was only used on standard PHYs, so we'll fake it here.
 838          * If later code tries to connect with the right interface, this will
 839          * be corrected by get_phy_device in phy_connect()
 840          */
 841         phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
 842
 843         return phy_reset(phydev);
 844 }
 845
 846 struct phy_device *phy_find_by_mask(struct mii_dev *bus, uint phy_mask,
 847                                     phy_interface_t interface)
 848 {
 849         /* Reset the bus */
 850         if (bus->reset) {
 851                 bus->reset(bus);
 852
 853                 /* Wait 15ms to make sure the PHY has come out of hard reset */
 854                 mdelay(15);
 855         }
 856
 857         return get_phy_device_by_mask(bus, phy_mask, interface);
 858 }
 859
 860 #ifdef CONFIG_DM_ETH
 861 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev)
 862 #else
 863 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
 864 #endif
 865 {
 866         /* Soft Reset the PHY */
 867         phy_reset(phydev);
 868         if (phydev->dev && phydev->dev != dev) {
 869                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 870                        phydev->bus->name, phydev->addr,
 871                        phydev->dev->name, dev->name);
 872         }
 873         phydev->dev = dev;
 874         debug("%s connected to %s\n", dev->name, phydev->drv->name);
 875 }
 876
 877 #ifdef CONFIG_DM_ETH
 878 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 879                                struct udevice *dev,
 880                                phy_interface_t interface)
 881 #else
 882 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 883                                struct eth_device *dev,
 884                                phy_interface_t interface)
 885 #endif
 886 {
 887         struct phy_device *phydev = NULL;
 888 #ifdef CONFIG_PHY_FIXED
 889         int sn;
 890         const char *name;
 891
 892         sn = fdt_first_subnode(gd->fdt_blob, dev_of_offset(dev));
 893         while (sn > 0) {
 894                 name = fdt_get_name(gd->fdt_blob, sn, NULL);
 895                 if (name && strcmp(name, "fixed-link") == 0) {
 896                         phydev = phy_device_create(bus,
 897                                                    sn, PHY_FIXED_ID, interface);
 898                         break;
 899                 }
 900                 sn = fdt_next_subnode(gd->fdt_blob, sn);
 901         }
 902 #endif
 903         if (!phydev)
 904                 phydev = phy_find_by_mask(bus, 1 << addr, interface);
 905
 906         if (phydev)
 907                 phy_connect_dev(phydev, dev);
 908         else
 909                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
 910         return phydev;
 911 }
 912
 913 /*
 914  * Start the PHY.  Returns 0 on success, or a negative error code.
 915  */
 916 int phy_startup(struct phy_device *phydev)
 917 {
 918         if (phydev->drv->startup)
 919                 return phydev->drv->startup(phydev);
 920
 921         return 0;
 922 }
 923
 924 __weak int board_phy_config(struct phy_device *phydev)
 925 {
 926         if (phydev->drv->config)
 927                 return phydev->drv->config(phydev);
 928         return 0;
 929 }
 930
 931 int phy_config(struct phy_device *phydev)
 932 {
 933         /* Invoke an optional board-specific helper */
 934         return board_phy_config(phydev);
 935 }
 936
 937 int phy_shutdown(struct phy_device *phydev)
 938 {
 939         if (phydev->drv->shutdown)
 940                 phydev->drv->shutdown(phydev);
 941
 942         return 0;
 943 }
 944
 945 int phy_get_interface_by_name(const char *str)
 946 {
 947         int i;
 948
 949         for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) {
 950                 if (!strcmp(str, phy_interface_strings[i]))
 951                         return i;
 952         }
 953
 954         return -1;
 955 }