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 <dm.h>
  15 #include <malloc.h>
  16 #include <net.h>
  17 #include <command.h>
  18 #include <miiphy.h>
  19 #include <phy.h>
  20 #include <errno.h>
  21 #include <linux/err.h>
  22 #include <linux/compiler.h>
  23
  24 DECLARE_GLOBAL_DATA_PTR;
  25
  26 /* Generic PHY support and helper functions */
  27
  28 /**
  29  * genphy_config_advert - sanitize and advertise auto-negotation parameters
  30  * @phydev: target phy_device struct
  31  *
  32  * Description: Writes MII_ADVERTISE with the appropriate values,
  33  *   after sanitizing the values to make sure we only advertise
  34  *   what is supported.  Returns < 0 on error, 0 if the PHY's advertisement
  35  *   hasn't changed, and > 0 if it has changed.
  36  */
  37 static int genphy_config_advert(struct phy_device *phydev)
  38 {
  39         u32 advertise;
  40         int oldadv, adv;
  41         int err, changed = 0;
  42
  43         /* Only allow advertising what
  44          * this PHY supports */
  45         phydev->advertising &= phydev->supported;
  46         advertise = phydev->advertising;
  47
  48         /* Setup standard advertisement */
  49         oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
  50
  51         if (adv < 0)
  52                 return adv;
  53
  54         adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
  55                  ADVERTISE_PAUSE_ASYM);
  56         if (advertise & ADVERTISED_10baseT_Half)
  57                 adv |= ADVERTISE_10HALF;
  58         if (advertise & ADVERTISED_10baseT_Full)
  59                 adv |= ADVERTISE_10FULL;
  60         if (advertise & ADVERTISED_100baseT_Half)
  61                 adv |= ADVERTISE_100HALF;
  62         if (advertise & ADVERTISED_100baseT_Full)
  63                 adv |= ADVERTISE_100FULL;
  64         if (advertise & ADVERTISED_Pause)
  65                 adv |= ADVERTISE_PAUSE_CAP;
  66         if (advertise & ADVERTISED_Asym_Pause)
  67                 adv |= ADVERTISE_PAUSE_ASYM;
  68         if (advertise & ADVERTISED_1000baseX_Half)
  69                 adv |= ADVERTISE_1000XHALF;
  70         if (advertise & ADVERTISED_1000baseX_Full)
  71                 adv |= ADVERTISE_1000XFULL;
  72
  73         if (adv != oldadv) {
  74                 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
  75
  76                 if (err < 0)
  77                         return err;
  78                 changed = 1;
  79         }
  80
  81         /* Configure gigabit if it's supported */
  82         if (phydev->supported & (SUPPORTED_1000baseT_Half |
  83                                 SUPPORTED_1000baseT_Full)) {
  84                 oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
  85
  86                 if (adv < 0)
  87                         return adv;
  88
  89                 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
  90                 if (advertise & SUPPORTED_1000baseT_Half)
  91                         adv |= ADVERTISE_1000HALF;
  92                 if (advertise & SUPPORTED_1000baseT_Full)
  93                         adv |= ADVERTISE_1000FULL;
  94
  95                 if (adv != oldadv) {
  96                         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000,
  97                                         adv);
  98
  99                         if (err < 0)
 100                                 return err;
 101                         changed = 1;
 102                 }
 103         }
 104
 105         return changed;
 106 }
 107
 108
 109 /**
 110  * genphy_setup_forced - configures/forces speed/duplex from @phydev
 111  * @phydev: target phy_device struct
 112  *
 113  * Description: Configures MII_BMCR to force speed/duplex
 114  *   to the values in phydev. Assumes that the values are valid.
 115  */
 116 static int genphy_setup_forced(struct phy_device *phydev)
 117 {
 118         int err;
 119         int ctl = 0;
 120
 121         phydev->pause = phydev->asym_pause = 0;
 122
 123         if (SPEED_1000 == phydev->speed)
 124                 ctl |= BMCR_SPEED1000;
 125         else if (SPEED_100 == phydev->speed)
 126                 ctl |= BMCR_SPEED100;
 127
 128         if (DUPLEX_FULL == phydev->duplex)
 129                 ctl |= BMCR_FULLDPLX;
 130
 131         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 132
 133         return err;
 134 }
 135
 136
 137 /**
 138  * genphy_restart_aneg - Enable and Restart Autonegotiation
 139  * @phydev: target phy_device struct
 140  */
 141 int genphy_restart_aneg(struct phy_device *phydev)
 142 {
 143         int ctl;
 144
 145         ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 146
 147         if (ctl < 0)
 148                 return ctl;
 149
 150         ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
 151
 152         /* Don't isolate the PHY if we're negotiating */
 153         ctl &= ~(BMCR_ISOLATE);
 154
 155         ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 156
 157         return ctl;
 158 }
 159
 160
 161 /**
 162  * genphy_config_aneg - restart auto-negotiation or write BMCR
 163  * @phydev: target phy_device struct
 164  *
 165  * Description: If auto-negotiation is enabled, we configure the
 166  *   advertising, and then restart auto-negotiation.  If it is not
 167  *   enabled, then we write the BMCR.
 168  */
 169 int genphy_config_aneg(struct phy_device *phydev)
 170 {
 171         int result;
 172
 173         if (AUTONEG_ENABLE != phydev->autoneg)
 174                 return genphy_setup_forced(phydev);
 175
 176         result = genphy_config_advert(phydev);
 177
 178         if (result < 0) /* error */
 179                 return result;
 180
 181         if (result == 0) {
 182                 /* Advertisment hasn't changed, but maybe aneg was never on to
 183                  * begin with?  Or maybe phy was isolated? */
 184                 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 185
 186                 if (ctl < 0)
 187                         return ctl;
 188
 189                 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
 190                         result = 1; /* do restart aneg */
 191         }
 192
 193         /* Only restart aneg if we are advertising something different
 194          * than we were before.  */
 195         if (result > 0)
 196                 result = genphy_restart_aneg(phydev);
 197
 198         return result;
 199 }
 200
 201 /**
 202  * genphy_update_link - update link status in @phydev
 203  * @phydev: target phy_device struct
 204  *
 205  * Description: Update the value in phydev->link to reflect the
 206  *   current link value.  In order to do this, we need to read
 207  *   the status register twice, keeping the second value.
 208  */
 209 int genphy_update_link(struct phy_device *phydev)
 210 {
 211         unsigned int mii_reg;
 212
 213         /*
 214          * Wait if the link is up, and autonegotiation is in progress
 215          * (ie - we're capable and it's not done)
 216          */
 217         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 218
 219         /*
 220          * If we already saw the link up, and it hasn't gone down, then
 221          * we don't need to wait for autoneg again
 222          */
 223         if (phydev->link && mii_reg & BMSR_LSTATUS)
 224                 return 0;
 225
 226         if ((mii_reg & BMSR_ANEGCAPABLE) && !(mii_reg & BMSR_ANEGCOMPLETE)) {
 227                 int i = 0;
 228
 229                 printf("%s Waiting for PHY auto negotiation to complete",
 230                         phydev->dev->name);
 231                 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
 232                         /*
 233                          * Timeout reached ?
 234                          */
 235                         if (i > PHY_ANEG_TIMEOUT) {
 236                                 printf(" TIMEOUT !\n");
 237                                 phydev->link = 0;
 238                                 return 0;
 239                         }
 240
 241                         if (ctrlc()) {
 242                                 puts("user interrupt!\n");
 243                                 phydev->link = 0;
 244                                 return -EINTR;
 245                         }
 246
 247                         if ((i++ % 500) == 0)
 248                                 printf(".");
 249
 250                         udelay(1000);   /* 1 ms */
 251                         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 252                 }
 253                 printf(" done\n");
 254                 phydev->link = 1;
 255         } else {
 256                 /* Read the link a second time to clear the latched state */
 257                 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 258
 259                 if (mii_reg & BMSR_LSTATUS)
 260                         phydev->link = 1;
 261                 else
 262                         phydev->link = 0;
 263         }
 264
 265         return 0;
 266 }
 267
 268 /*
 269  * Generic function which updates the speed and duplex.  If
 270  * autonegotiation is enabled, it uses the AND of the link
 271  * partner's advertised capabilities and our advertised
 272  * capabilities.  If autonegotiation is disabled, we use the
 273  * appropriate bits in the control register.
 274  *
 275  * Stolen from Linux's mii.c and phy_device.c
 276  */
 277 int genphy_parse_link(struct phy_device *phydev)
 278 {
 279         int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 280
 281         /* We're using autonegotiation */
 282         if (phydev->supported & SUPPORTED_Autoneg) {
 283                 u32 lpa = 0;
 284                 int gblpa = 0;
 285                 u32 estatus = 0;
 286
 287                 /* Check for gigabit capability */
 288                 if (phydev->supported & (SUPPORTED_1000baseT_Full |
 289                                         SUPPORTED_1000baseT_Half)) {
 290                         /* We want a list of states supported by
 291                          * both PHYs in the link
 292                          */
 293                         gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
 294                         if (gblpa < 0) {
 295                                 debug("Could not read MII_STAT1000. Ignoring gigabit capability\n");
 296                                 gblpa = 0;
 297                         }
 298                         gblpa &= phy_read(phydev,
 299                                         MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
 300                 }
 301
 302                 /* Set the baseline so we only have to set them
 303                  * if they're different
 304                  */
 305                 phydev->speed = SPEED_10;
 306                 phydev->duplex = DUPLEX_HALF;
 307
 308                 /* Check the gigabit fields */
 309                 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
 310                         phydev->speed = SPEED_1000;
 311
 312                         if (gblpa & PHY_1000BTSR_1000FD)
 313                                 phydev->duplex = DUPLEX_FULL;
 314
 315                         /* We're done! */
 316                         return 0;
 317                 }
 318
 319                 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
 320                 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
 321
 322                 if (lpa & (LPA_100FULL | LPA_100HALF)) {
 323                         phydev->speed = SPEED_100;
 324
 325                         if (lpa & LPA_100FULL)
 326                                 phydev->duplex = DUPLEX_FULL;
 327
 328                 } else if (lpa & LPA_10FULL)
 329                         phydev->duplex = DUPLEX_FULL;
 330
 331                 /*
 332                  * Extended status may indicate that the PHY supports
 333                  * 1000BASE-T/X even though the 1000BASE-T registers
 334                  * are missing. In this case we can't tell whether the
 335                  * peer also supports it, so we only check extended
 336                  * status if the 1000BASE-T registers are actually
 337                  * missing.
 338                  */
 339                 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
 340                         estatus = phy_read(phydev, MDIO_DEVAD_NONE,
 341                                            MII_ESTATUS);
 342
 343                 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
 344                                 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
 345                         phydev->speed = SPEED_1000;
 346                         if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
 347                                 phydev->duplex = DUPLEX_FULL;
 348                 }
 349
 350         } else {
 351                 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 352
 353                 phydev->speed = SPEED_10;
 354                 phydev->duplex = DUPLEX_HALF;
 355
 356                 if (bmcr & BMCR_FULLDPLX)
 357                         phydev->duplex = DUPLEX_FULL;
 358
 359                 if (bmcr & BMCR_SPEED1000)
 360                         phydev->speed = SPEED_1000;
 361                 else if (bmcr & BMCR_SPEED100)
 362                         phydev->speed = SPEED_100;
 363         }
 364
 365         return 0;
 366 }
 367
 368 int genphy_config(struct phy_device *phydev)
 369 {
 370         int val;
 371         u32 features;
 372
 373         /* For now, I'll claim that the generic driver supports
 374          * all possible port types */
 375         features = (SUPPORTED_TP | SUPPORTED_MII
 376                         | SUPPORTED_AUI | SUPPORTED_FIBRE |
 377                         SUPPORTED_BNC);
 378
 379         /* Do we support autonegotiation? */
 380         val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 381
 382         if (val < 0)
 383                 return val;
 384
 385         if (val & BMSR_ANEGCAPABLE)
 386                 features |= SUPPORTED_Autoneg;
 387
 388         if (val & BMSR_100FULL)
 389                 features |= SUPPORTED_100baseT_Full;
 390         if (val & BMSR_100HALF)
 391                 features |= SUPPORTED_100baseT_Half;
 392         if (val & BMSR_10FULL)
 393                 features |= SUPPORTED_10baseT_Full;
 394         if (val & BMSR_10HALF)
 395                 features |= SUPPORTED_10baseT_Half;
 396
 397         if (val & BMSR_ESTATEN) {
 398                 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
 399
 400                 if (val < 0)
 401                         return val;
 402
 403                 if (val & ESTATUS_1000_TFULL)
 404                         features |= SUPPORTED_1000baseT_Full;
 405                 if (val & ESTATUS_1000_THALF)
 406                         features |= SUPPORTED_1000baseT_Half;
 407                 if (val & ESTATUS_1000_XFULL)
 408                         features |= SUPPORTED_1000baseX_Full;
 409                 if (val & ESTATUS_1000_XHALF)
 410                         features |= SUPPORTED_1000baseX_Half;
 411         }
 412
 413         phydev->supported = features;
 414         phydev->advertising = features;
 415
 416         genphy_config_aneg(phydev);
 417
 418         return 0;
 419 }
 420
 421 int genphy_startup(struct phy_device *phydev)
 422 {
 423         genphy_update_link(phydev);
 424         genphy_parse_link(phydev);
 425
 426         return 0;
 427 }
 428
 429 int genphy_shutdown(struct phy_device *phydev)
 430 {
 431         return 0;
 432 }
 433
 434 static struct phy_driver genphy_driver = {
 435         .uid            = 0xffffffff,
 436         .mask           = 0xffffffff,
 437         .name           = "Generic PHY",
 438         .features       = 0,
 439         .config         = genphy_config,
 440         .startup        = genphy_startup,
 441         .shutdown       = genphy_shutdown,
 442 };
 443
 444 static LIST_HEAD(phy_drivers);
 445
 446 int phy_init(void)
 447 {
 448 #ifdef CONFIG_PHY_AQUANTIA
 449         phy_aquantia_init();
 450 #endif
 451 #ifdef CONFIG_PHY_ATHEROS
 452         phy_atheros_init();
 453 #endif
 454 #ifdef CONFIG_PHY_BROADCOM
 455         phy_broadcom_init();
 456 #endif
 457 #ifdef CONFIG_PHY_CORTINA
 458         phy_cortina_init();
 459 #endif
 460 #ifdef CONFIG_PHY_DAVICOM
 461         phy_davicom_init();
 462 #endif
 463 #ifdef CONFIG_PHY_ET1011C
 464         phy_et1011c_init();
 465 #endif
 466 #ifdef CONFIG_PHY_LXT
 467         phy_lxt_init();
 468 #endif
 469 #ifdef CONFIG_PHY_MARVELL
 470         phy_marvell_init();
 471 #endif
 472 #ifdef CONFIG_PHY_MICREL
 473         phy_micrel_init();
 474 #endif
 475 #ifdef CONFIG_PHY_NATSEMI
 476         phy_natsemi_init();
 477 #endif
 478 #ifdef CONFIG_PHY_REALTEK
 479         phy_realtek_init();
 480 #endif
 481 #ifdef CONFIG_PHY_SMSC
 482         phy_smsc_init();
 483 #endif
 484 #ifdef CONFIG_PHY_TERANETICS
 485         phy_teranetics_init();
 486 #endif
 487 #ifdef CONFIG_PHY_TI
 488         phy_ti_init();
 489 #endif
 490 #ifdef CONFIG_PHY_VITESSE
 491         phy_vitesse_init();
 492 #endif
 493
 494         return 0;
 495 }
 496
 497 int phy_register(struct phy_driver *drv)
 498 {
 499         INIT_LIST_HEAD(&drv->list);
 500         list_add_tail(&drv->list, &phy_drivers);
 501
 502 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 503         if (drv->probe)
 504                 drv->probe += gd->reloc_off;
 505         if (drv->config)
 506                 drv->config += gd->reloc_off;
 507         if (drv->startup)
 508                 drv->startup += gd->reloc_off;
 509         if (drv->shutdown)
 510                 drv->shutdown += gd->reloc_off;
 511         if (drv->readext)
 512                 drv->readext += gd->reloc_off;
 513         if (drv->writeext)
 514                 drv->writeext += gd->reloc_off;
 515 #endif
 516         return 0;
 517 }
 518
 519 static int phy_probe(struct phy_device *phydev)
 520 {
 521         int err = 0;
 522
 523         phydev->advertising = phydev->supported = phydev->drv->features;
 524         phydev->mmds = phydev->drv->mmds;
 525
 526         if (phydev->drv->probe)
 527                 err = phydev->drv->probe(phydev);
 528
 529         return err;
 530 }
 531
 532 static struct phy_driver *generic_for_interface(phy_interface_t interface)
 533 {
 534 #ifdef CONFIG_PHYLIB_10G
 535         if (is_10g_interface(interface))
 536                 return &gen10g_driver;
 537 #endif
 538
 539         return &genphy_driver;
 540 }
 541
 542 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
 543                                 phy_interface_t interface)
 544 {
 545         struct list_head *entry;
 546         int phy_id = phydev->phy_id;
 547         struct phy_driver *drv = NULL;
 548
 549         list_for_each(entry, &phy_drivers) {
 550                 drv = list_entry(entry, struct phy_driver, list);
 551                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 552                         return drv;
 553         }
 554
 555         /* If we made it here, there's no driver for this PHY */
 556         return generic_for_interface(interface);
 557 }
 558
 559 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 560                                             u32 phy_id,
 561                                             phy_interface_t interface)
 562 {
 563         struct phy_device *dev;
 564
 565         /* We allocate the device, and initialize the
 566          * default values */
 567         dev = malloc(sizeof(*dev));
 568         if (!dev) {
 569                 printf("Failed to allocate PHY device for %s:%d\n",
 570                         bus->name, addr);
 571                 return NULL;
 572         }
 573
 574         memset(dev, 0, sizeof(*dev));
 575
 576         dev->duplex = -1;
 577         dev->link = 0;
 578         dev->interface = interface;
 579
 580         dev->autoneg = AUTONEG_ENABLE;
 581
 582         dev->addr = addr;
 583         dev->phy_id = phy_id;
 584         dev->bus = bus;
 585
 586         dev->drv = get_phy_driver(dev, interface);
 587
 588         phy_probe(dev);
 589
 590         bus->phymap[addr] = dev;
 591
 592         return dev;
 593 }
 594
 595 /**
 596  * get_phy_id - reads the specified addr for its ID.
 597  * @bus: the target MII bus
 598  * @addr: PHY address on the MII bus
 599  * @phy_id: where to store the ID retrieved.
 600  *
 601  * Description: Reads the ID registers of the PHY at @addr on the
 602  *   @bus, stores it in @phy_id and returns zero on success.
 603  */
 604 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 605 {
 606         int phy_reg;
 607
 608         /* Grab the bits from PHYIR1, and put them
 609          * in the upper half */
 610         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 611
 612         if (phy_reg < 0)
 613                 return -EIO;
 614
 615         *phy_id = (phy_reg & 0xffff) << 16;
 616
 617         /* Grab the bits from PHYIR2, and put them in the lower half */
 618         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 619
 620         if (phy_reg < 0)
 621                 return -EIO;
 622
 623         *phy_id |= (phy_reg & 0xffff);
 624
 625         return 0;
 626 }
 627
 628 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 629                 unsigned phy_mask, int devad, phy_interface_t interface)
 630 {
 631         u32 phy_id = 0xffffffff;
 632         while (phy_mask) {
 633                 int addr = ffs(phy_mask) - 1;
 634                 int r = get_phy_id(bus, addr, devad, &phy_id);
 635                 /* If the PHY ID is mostly f's, we didn't find anything */
 636                 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff)
 637                         return phy_device_create(bus, addr, phy_id, interface);
 638                 phy_mask &= ~(1 << addr);
 639         }
 640         return NULL;
 641 }
 642
 643 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 644                 unsigned phy_mask, phy_interface_t interface)
 645 {
 646         /* If we have one, return the existing device, with new interface */
 647         while (phy_mask) {
 648                 int addr = ffs(phy_mask) - 1;
 649                 if (bus->phymap[addr]) {
 650                         bus->phymap[addr]->interface = interface;
 651                         return bus->phymap[addr];
 652                 }
 653                 phy_mask &= ~(1 << addr);
 654         }
 655         return NULL;
 656 }
 657
 658 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 659                 unsigned phy_mask, phy_interface_t interface)
 660 {
 661         int i;
 662         struct phy_device *phydev;
 663
 664         phydev = search_for_existing_phy(bus, phy_mask, interface);
 665         if (phydev)
 666                 return phydev;
 667         /* Try Standard (ie Clause 22) access */
 668         /* Otherwise we have to try Clause 45 */
 669         for (i = 0; i < 5; i++) {
 670                 phydev = create_phy_by_mask(bus, phy_mask,
 671                                 i ? i : MDIO_DEVAD_NONE, interface);
 672                 if (IS_ERR(phydev))
 673                         return NULL;
 674                 if (phydev)
 675                         return phydev;
 676         }
 677
 678         debug("\n%s PHY: ", bus->name);
 679         while (phy_mask) {
 680                 int addr = ffs(phy_mask) - 1;
 681                 debug("%d ", addr);
 682                 phy_mask &= ~(1 << addr);
 683         }
 684         debug("not found\n");
 685
 686         return NULL;
 687 }
 688
 689 /**
 690  * get_phy_device - reads the specified PHY device and returns its @phy_device struct
 691  * @bus: the target MII bus
 692  * @addr: PHY address on the MII bus
 693  *
 694  * Description: Reads the ID registers of the PHY at @addr on the
 695  *   @bus, then allocates and returns the phy_device to represent it.
 696  */
 697 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
 698                                          phy_interface_t interface)
 699 {
 700         return get_phy_device_by_mask(bus, 1 << addr, interface);
 701 }
 702
 703 int phy_reset(struct phy_device *phydev)
 704 {
 705         int reg;
 706         int timeout = 500;
 707         int devad = MDIO_DEVAD_NONE;
 708
 709 #ifdef CONFIG_PHYLIB_10G
 710         /* If it's 10G, we need to issue reset through one of the MMDs */
 711         if (is_10g_interface(phydev->interface)) {
 712                 if (!phydev->mmds)
 713                         gen10g_discover_mmds(phydev);
 714
 715                 devad = ffs(phydev->mmds) - 1;
 716         }
 717 #endif
 718
 719         reg = phy_read(phydev, devad, MII_BMCR);
 720         if (reg < 0) {
 721                 debug("PHY status read failed\n");
 722                 return -1;
 723         }
 724
 725         reg |= BMCR_RESET;
 726
 727         if (phy_write(phydev, devad, MII_BMCR, reg) < 0) {
 728                 debug("PHY reset failed\n");
 729                 return -1;
 730         }
 731
 732 #ifdef CONFIG_PHY_RESET_DELAY
 733         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 734 #endif
 735         /*
 736          * Poll the control register for the reset bit to go to 0 (it is
 737          * auto-clearing).  This should happen within 0.5 seconds per the
 738          * IEEE spec.
 739          */
 740         while ((reg & BMCR_RESET) && timeout--) {
 741                 reg = phy_read(phydev, devad, MII_BMCR);
 742
 743                 if (reg < 0) {
 744                         debug("PHY status read failed\n");
 745                         return -1;
 746                 }
 747                 udelay(1000);
 748         }
 749
 750         if (reg & BMCR_RESET) {
 751                 puts("PHY reset timed out\n");
 752                 return -1;
 753         }
 754
 755         return 0;
 756 }
 757
 758 int miiphy_reset(const char *devname, unsigned char addr)
 759 {
 760         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 761         struct phy_device *phydev;
 762
 763         /*
 764          * miiphy_reset was only used on standard PHYs, so we'll fake it here.
 765          * If later code tries to connect with the right interface, this will
 766          * be corrected by get_phy_device in phy_connect()
 767          */
 768         phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
 769
 770         return phy_reset(phydev);
 771 }
 772
 773 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
 774                 phy_interface_t interface)
 775 {
 776         /* Reset the bus */
 777         if (bus->reset) {
 778                 bus->reset(bus);
 779
 780                 /* Wait 15ms to make sure the PHY has come out of hard reset */
 781                 udelay(15000);
 782         }
 783
 784         return get_phy_device_by_mask(bus, phy_mask, interface);
 785 }
 786
 787 #ifdef CONFIG_DM_ETH
 788 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev)
 789 #else
 790 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
 791 #endif
 792 {
 793         /* Soft Reset the PHY */
 794         phy_reset(phydev);
 795         if (phydev->dev && phydev->dev != dev) {
 796                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 797                                 phydev->bus->name, phydev->addr,
 798                                 phydev->dev->name, dev->name);
 799         }
 800         phydev->dev = dev;
 801         debug("%s connected to %s\n", dev->name, phydev->drv->name);
 802 }
 803
 804 #ifdef CONFIG_DM_ETH
 805 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 806                 struct udevice *dev, phy_interface_t interface)
 807 #else
 808 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 809                 struct eth_device *dev, phy_interface_t interface)
 810 #endif
 811 {
 812         struct phy_device *phydev;
 813
 814         phydev = phy_find_by_mask(bus, 1 << addr, interface);
 815         if (phydev)
 816                 phy_connect_dev(phydev, dev);
 817         else
 818                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
 819         return phydev;
 820 }
 821
 822 /*
 823  * Start the PHY.  Returns 0 on success, or a negative error code.
 824  */
 825 int phy_startup(struct phy_device *phydev)
 826 {
 827         if (phydev->drv->startup)
 828                 return phydev->drv->startup(phydev);
 829
 830         return 0;
 831 }
 832
 833 __weak int board_phy_config(struct phy_device *phydev)
 834 {
 835         if (phydev->drv->config)
 836                 return phydev->drv->config(phydev);
 837         return 0;
 838 }
 839
 840 int phy_config(struct phy_device *phydev)
 841 {
 842         /* Invoke an optional board-specific helper */
 843         board_phy_config(phydev);
 844
 845         return 0;
 846 }
 847
 848 int phy_shutdown(struct phy_device *phydev)
 849 {
 850         if (phydev->drv->shutdown)
 851                 phydev->drv->shutdown(phydev);
 852
 853         return 0;
 854 }
 855
 856 int phy_get_interface_by_name(const char *str)
 857 {
 858         int i;
 859
 860         for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) {
 861                 if (!strcmp(str, phy_interface_strings[i]))
 862                         return i;
 863         }
 864
 865         return -1;
 866 }