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-negotation 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 /** 122 * genphy_setup_forced - configures/forces speed/duplex from @phydev 123 * @phydev: target phy_device struct 124 * 125 * Description: Configures MII_BMCR to force speed/duplex 126 * to the values in phydev. Assumes that the values are valid. 127 */ 128 static int genphy_setup_forced(struct phy_device *phydev) 129 { 130 int err; 131 int ctl = 0; 132 133 phydev->pause = phydev->asym_pause = 0; 134 135 if (SPEED_1000 == phydev->speed) 136 ctl |= BMCR_SPEED1000; 137 else if (SPEED_100 == phydev->speed) 138 ctl |= BMCR_SPEED100; 139 140 if (DUPLEX_FULL == phydev->duplex) 141 ctl |= BMCR_FULLDPLX; 142 143 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl); 144 145 return err; 146 } 147 148 149 /** 150 * genphy_restart_aneg - Enable and Restart Autonegotiation 151 * @phydev: target phy_device struct 152 */ 153 int genphy_restart_aneg(struct phy_device *phydev) 154 { 155 int ctl; 156 157 ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR); 158 159 if (ctl < 0) 160 return ctl; 161 162 ctl |= (BMCR_ANENABLE | BMCR_ANRESTART); 163 164 /* Don't isolate the PHY if we're negotiating */ 165 ctl &= ~(BMCR_ISOLATE); 166 167 ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl); 168 169 return ctl; 170 } 171 172 173 /** 174 * genphy_config_aneg - restart auto-negotiation or write BMCR 175 * @phydev: target phy_device struct 176 * 177 * Description: If auto-negotiation is enabled, we configure the 178 * advertising, and then restart auto-negotiation. If it is not 179 * enabled, then we write the BMCR. 180 */ 181 int genphy_config_aneg(struct phy_device *phydev) 182 { 183 int result; 184 185 if (AUTONEG_ENABLE != phydev->autoneg) 186 return genphy_setup_forced(phydev); 187 188 result = genphy_config_advert(phydev); 189 190 if (result < 0) /* error */ 191 return result; 192 193 if (result == 0) { 194 /* Advertisment hasn't changed, but maybe aneg was never on to 195 * begin with? Or maybe phy was isolated? */ 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 /* Only restart aneg if we are advertising something different 206 * than we were before. */ 207 if (result > 0) 208 result = genphy_restart_aneg(phydev); 209 210 return result; 211 } 212 213 /** 214 * genphy_update_link - update link status in @phydev 215 * @phydev: target phy_device struct 216 * 217 * Description: Update the value in phydev->link to reflect the 218 * current link value. In order to do this, we need to read 219 * the status register twice, keeping the second value. 220 */ 221 int genphy_update_link(struct phy_device *phydev) 222 { 223 unsigned int mii_reg; 224 225 /* 226 * Wait if the link is up, and autonegotiation is in progress 227 * (ie - we're capable and it's not done) 228 */ 229 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR); 230 231 /* 232 * If we already saw the link up, and it hasn't gone down, then 233 * we don't need to wait for autoneg again 234 */ 235 if (phydev->link && mii_reg & BMSR_LSTATUS) 236 return 0; 237 238 if ((mii_reg & BMSR_ANEGCAPABLE) && !(mii_reg & BMSR_ANEGCOMPLETE)) { 239 int i = 0; 240 241 printf("%s Waiting for PHY auto negotiation to complete", 242 phydev->dev->name); 243 while (!(mii_reg & BMSR_ANEGCOMPLETE)) { 244 /* 245 * Timeout reached ? 246 */ 247 if (i > PHY_ANEG_TIMEOUT) { 248 printf(" TIMEOUT !\n"); 249 phydev->link = 0; 250 return 0; 251 } 252 253 if (ctrlc()) { 254 puts("user interrupt!\n"); 255 phydev->link = 0; 256 return -EINTR; 257 } 258 259 if ((i++ % 500) == 0) 260 printf("."); 261 262 udelay(1000); /* 1 ms */ 263 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR); 264 } 265 printf(" done\n"); 266 phydev->link = 1; 267 } else { 268 /* Read the link a second time to clear the latched state */ 269 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR); 270 271 if (mii_reg & BMSR_LSTATUS) 272 phydev->link = 1; 273 else 274 phydev->link = 0; 275 } 276 277 return 0; 278 } 279 280 /* 281 * Generic function which updates the speed and duplex. If 282 * autonegotiation is enabled, it uses the AND of the link 283 * partner's advertised capabilities and our advertised 284 * capabilities. If autonegotiation is disabled, we use the 285 * appropriate bits in the control register. 286 * 287 * Stolen from Linux's mii.c and phy_device.c 288 */ 289 int genphy_parse_link(struct phy_device *phydev) 290 { 291 int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR); 292 293 /* We're using autonegotiation */ 294 if (phydev->supported & SUPPORTED_Autoneg) { 295 u32 lpa = 0; 296 int gblpa = 0; 297 u32 estatus = 0; 298 299 /* Check for gigabit capability */ 300 if (phydev->supported & (SUPPORTED_1000baseT_Full | 301 SUPPORTED_1000baseT_Half)) { 302 /* We want a list of states supported by 303 * both PHYs in the link 304 */ 305 gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000); 306 if (gblpa < 0) { 307 debug("Could not read MII_STAT1000. Ignoring gigabit capability\n"); 308 gblpa = 0; 309 } 310 gblpa &= phy_read(phydev, 311 MDIO_DEVAD_NONE, MII_CTRL1000) << 2; 312 } 313 314 /* Set the baseline so we only have to set them 315 * if they're different 316 */ 317 phydev->speed = SPEED_10; 318 phydev->duplex = DUPLEX_HALF; 319 320 /* Check the gigabit fields */ 321 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) { 322 phydev->speed = SPEED_1000; 323 324 if (gblpa & PHY_1000BTSR_1000FD) 325 phydev->duplex = DUPLEX_FULL; 326 327 /* We're done! */ 328 return 0; 329 } 330 331 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE); 332 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA); 333 334 if (lpa & (LPA_100FULL | LPA_100HALF)) { 335 phydev->speed = SPEED_100; 336 337 if (lpa & LPA_100FULL) 338 phydev->duplex = DUPLEX_FULL; 339 340 } else if (lpa & LPA_10FULL) 341 phydev->duplex = DUPLEX_FULL; 342 343 /* 344 * Extended status may indicate that the PHY supports 345 * 1000BASE-T/X even though the 1000BASE-T registers 346 * are missing. In this case we can't tell whether the 347 * peer also supports it, so we only check extended 348 * status if the 1000BASE-T registers are actually 349 * missing. 350 */ 351 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP)) 352 estatus = phy_read(phydev, MDIO_DEVAD_NONE, 353 MII_ESTATUS); 354 355 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF | 356 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) { 357 phydev->speed = SPEED_1000; 358 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL)) 359 phydev->duplex = DUPLEX_FULL; 360 } 361 362 } else { 363 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR); 364 365 phydev->speed = SPEED_10; 366 phydev->duplex = DUPLEX_HALF; 367 368 if (bmcr & BMCR_FULLDPLX) 369 phydev->duplex = DUPLEX_FULL; 370 371 if (bmcr & BMCR_SPEED1000) 372 phydev->speed = SPEED_1000; 373 else if (bmcr & BMCR_SPEED100) 374 phydev->speed = SPEED_100; 375 } 376 377 return 0; 378 } 379 380 int genphy_config(struct phy_device *phydev) 381 { 382 int val; 383 u32 features; 384 385 features = (SUPPORTED_TP | SUPPORTED_MII 386 | SUPPORTED_AUI | SUPPORTED_FIBRE | 387 SUPPORTED_BNC); 388 389 /* Do we support autonegotiation? */ 390 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR); 391 392 if (val < 0) 393 return val; 394 395 if (val & BMSR_ANEGCAPABLE) 396 features |= SUPPORTED_Autoneg; 397 398 if (val & BMSR_100FULL) 399 features |= SUPPORTED_100baseT_Full; 400 if (val & BMSR_100HALF) 401 features |= SUPPORTED_100baseT_Half; 402 if (val & BMSR_10FULL) 403 features |= SUPPORTED_10baseT_Full; 404 if (val & BMSR_10HALF) 405 features |= SUPPORTED_10baseT_Half; 406 407 if (val & BMSR_ESTATEN) { 408 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS); 409 410 if (val < 0) 411 return val; 412 413 if (val & ESTATUS_1000_TFULL) 414 features |= SUPPORTED_1000baseT_Full; 415 if (val & ESTATUS_1000_THALF) 416 features |= SUPPORTED_1000baseT_Half; 417 if (val & ESTATUS_1000_XFULL) 418 features |= SUPPORTED_1000baseX_Full; 419 if (val & ESTATUS_1000_XHALF) 420 features |= SUPPORTED_1000baseX_Half; 421 } 422 423 phydev->supported &= features; 424 phydev->advertising &= features; 425 426 genphy_config_aneg(phydev); 427 428 return 0; 429 } 430 431 int genphy_startup(struct phy_device *phydev) 432 { 433 genphy_update_link(phydev); 434 genphy_parse_link(phydev); 435 436 return 0; 437 } 438 439 int genphy_shutdown(struct phy_device *phydev) 440 { 441 return 0; 442 } 443 444 static struct phy_driver genphy_driver = { 445 .uid = 0xffffffff, 446 .mask = 0xffffffff, 447 .name = "Generic PHY", 448 .features = PHY_GBIT_FEATURES | SUPPORTED_MII | 449 SUPPORTED_AUI | SUPPORTED_FIBRE | 450 SUPPORTED_BNC, 451 .config = genphy_config, 452 .startup = genphy_startup, 453 .shutdown = genphy_shutdown, 454 }; 455 456 static LIST_HEAD(phy_drivers); 457 458 int phy_init(void) 459 { 460 #ifdef CONFIG_PHY_AQUANTIA 461 phy_aquantia_init(); 462 #endif 463 #ifdef CONFIG_PHY_ATHEROS 464 phy_atheros_init(); 465 #endif 466 #ifdef CONFIG_PHY_BROADCOM 467 phy_broadcom_init(); 468 #endif 469 #ifdef CONFIG_PHY_CORTINA 470 phy_cortina_init(); 471 #endif 472 #ifdef CONFIG_PHY_DAVICOM 473 phy_davicom_init(); 474 #endif 475 #ifdef CONFIG_PHY_ET1011C 476 phy_et1011c_init(); 477 #endif 478 #ifdef CONFIG_PHY_LXT 479 phy_lxt_init(); 480 #endif 481 #ifdef CONFIG_PHY_MARVELL 482 phy_marvell_init(); 483 #endif 484 #ifdef CONFIG_PHY_MICREL 485 phy_micrel_init(); 486 #endif 487 #ifdef CONFIG_PHY_NATSEMI 488 phy_natsemi_init(); 489 #endif 490 #ifdef CONFIG_PHY_REALTEK 491 phy_realtek_init(); 492 #endif 493 #ifdef CONFIG_PHY_SMSC 494 phy_smsc_init(); 495 #endif 496 #ifdef CONFIG_PHY_TERANETICS 497 phy_teranetics_init(); 498 #endif 499 #ifdef CONFIG_PHY_TI 500 phy_ti_init(); 501 #endif 502 #ifdef CONFIG_PHY_VITESSE 503 phy_vitesse_init(); 504 #endif 505 506 return 0; 507 } 508 509 int phy_register(struct phy_driver *drv) 510 { 511 INIT_LIST_HEAD(&drv->list); 512 list_add_tail(&drv->list, &phy_drivers); 513 514 #ifdef CONFIG_NEEDS_MANUAL_RELOC 515 if (drv->probe) 516 drv->probe += gd->reloc_off; 517 if (drv->config) 518 drv->config += gd->reloc_off; 519 if (drv->startup) 520 drv->startup += gd->reloc_off; 521 if (drv->shutdown) 522 drv->shutdown += gd->reloc_off; 523 if (drv->readext) 524 drv->readext += gd->reloc_off; 525 if (drv->writeext) 526 drv->writeext += gd->reloc_off; 527 #endif 528 return 0; 529 } 530 531 int phy_set_supported(struct phy_device *phydev, u32 max_speed) 532 { 533 /* The default values for phydev->supported are provided by the PHY 534 * driver "features" member, we want to reset to sane defaults first 535 * before supporting higher speeds. 536 */ 537 phydev->supported &= PHY_DEFAULT_FEATURES; 538 539 switch (max_speed) { 540 default: 541 return -ENOTSUPP; 542 case SPEED_1000: 543 phydev->supported |= PHY_1000BT_FEATURES; 544 /* fall through */ 545 case SPEED_100: 546 phydev->supported |= PHY_100BT_FEATURES; 547 /* fall through */ 548 case SPEED_10: 549 phydev->supported |= PHY_10BT_FEATURES; 550 } 551 552 return 0; 553 } 554 555 static int phy_probe(struct phy_device *phydev) 556 { 557 int err = 0; 558 559 phydev->advertising = phydev->supported = phydev->drv->features; 560 phydev->mmds = phydev->drv->mmds; 561 562 if (phydev->drv->probe) 563 err = phydev->drv->probe(phydev); 564 565 return err; 566 } 567 568 static struct phy_driver *generic_for_interface(phy_interface_t interface) 569 { 570 #ifdef CONFIG_PHYLIB_10G 571 if (is_10g_interface(interface)) 572 return &gen10g_driver; 573 #endif 574 575 return &genphy_driver; 576 } 577 578 static struct phy_driver *get_phy_driver(struct phy_device *phydev, 579 phy_interface_t interface) 580 { 581 struct list_head *entry; 582 int phy_id = phydev->phy_id; 583 struct phy_driver *drv = NULL; 584 585 list_for_each(entry, &phy_drivers) { 586 drv = list_entry(entry, struct phy_driver, list); 587 if ((drv->uid & drv->mask) == (phy_id & drv->mask)) 588 return drv; 589 } 590 591 /* If we made it here, there's no driver for this PHY */ 592 return generic_for_interface(interface); 593 } 594 595 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr, 596 u32 phy_id, 597 phy_interface_t interface) 598 { 599 struct phy_device *dev; 600 601 /* We allocate the device, and initialize the 602 * default values */ 603 dev = malloc(sizeof(*dev)); 604 if (!dev) { 605 printf("Failed to allocate PHY device for %s:%d\n", 606 bus->name, addr); 607 return NULL; 608 } 609 610 memset(dev, 0, sizeof(*dev)); 611 612 dev->duplex = -1; 613 dev->link = 0; 614 dev->interface = interface; 615 616 dev->autoneg = AUTONEG_ENABLE; 617 618 dev->addr = addr; 619 dev->phy_id = phy_id; 620 dev->bus = bus; 621 622 dev->drv = get_phy_driver(dev, interface); 623 624 phy_probe(dev); 625 626 bus->phymap[addr] = dev; 627 628 return dev; 629 } 630 631 /** 632 * get_phy_id - reads the specified addr for its ID. 633 * @bus: the target MII bus 634 * @addr: PHY address on the MII bus 635 * @phy_id: where to store the ID retrieved. 636 * 637 * Description: Reads the ID registers of the PHY at @addr on the 638 * @bus, stores it in @phy_id and returns zero on success. 639 */ 640 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id) 641 { 642 int phy_reg; 643 644 /* Grab the bits from PHYIR1, and put them 645 * in the upper half */ 646 phy_reg = bus->read(bus, addr, devad, MII_PHYSID1); 647 648 if (phy_reg < 0) 649 return -EIO; 650 651 *phy_id = (phy_reg & 0xffff) << 16; 652 653 /* Grab the bits from PHYIR2, and put them in the lower half */ 654 phy_reg = bus->read(bus, addr, devad, MII_PHYSID2); 655 656 if (phy_reg < 0) 657 return -EIO; 658 659 *phy_id |= (phy_reg & 0xffff); 660 661 return 0; 662 } 663 664 static struct phy_device *create_phy_by_mask(struct mii_dev *bus, 665 unsigned phy_mask, int devad, phy_interface_t interface) 666 { 667 u32 phy_id = 0xffffffff; 668 while (phy_mask) { 669 int addr = ffs(phy_mask) - 1; 670 int r = get_phy_id(bus, addr, devad, &phy_id); 671 /* If the PHY ID is mostly f's, we didn't find anything */ 672 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff) 673 return phy_device_create(bus, addr, phy_id, interface); 674 phy_mask &= ~(1 << addr); 675 } 676 return NULL; 677 } 678 679 static struct phy_device *search_for_existing_phy(struct mii_dev *bus, 680 unsigned phy_mask, phy_interface_t interface) 681 { 682 /* If we have one, return the existing device, with new interface */ 683 while (phy_mask) { 684 int addr = ffs(phy_mask) - 1; 685 if (bus->phymap[addr]) { 686 bus->phymap[addr]->interface = interface; 687 return bus->phymap[addr]; 688 } 689 phy_mask &= ~(1 << addr); 690 } 691 return NULL; 692 } 693 694 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus, 695 unsigned phy_mask, phy_interface_t interface) 696 { 697 int i; 698 struct phy_device *phydev; 699 700 phydev = search_for_existing_phy(bus, phy_mask, interface); 701 if (phydev) 702 return phydev; 703 /* Try Standard (ie Clause 22) access */ 704 /* Otherwise we have to try Clause 45 */ 705 for (i = 0; i < 5; i++) { 706 phydev = create_phy_by_mask(bus, phy_mask, 707 i ? i : MDIO_DEVAD_NONE, interface); 708 if (IS_ERR(phydev)) 709 return NULL; 710 if (phydev) 711 return phydev; 712 } 713 714 debug("\n%s PHY: ", bus->name); 715 while (phy_mask) { 716 int addr = ffs(phy_mask) - 1; 717 debug("%d ", addr); 718 phy_mask &= ~(1 << addr); 719 } 720 debug("not found\n"); 721 722 return NULL; 723 } 724 725 /** 726 * get_phy_device - reads the specified PHY device and returns its @phy_device struct 727 * @bus: the target MII bus 728 * @addr: PHY address on the MII bus 729 * 730 * Description: Reads the ID registers of the PHY at @addr on the 731 * @bus, then allocates and returns the phy_device to represent it. 732 */ 733 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr, 734 phy_interface_t interface) 735 { 736 return get_phy_device_by_mask(bus, 1 << addr, interface); 737 } 738 739 int phy_reset(struct phy_device *phydev) 740 { 741 int reg; 742 int timeout = 500; 743 int devad = MDIO_DEVAD_NONE; 744 745 #ifdef CONFIG_PHYLIB_10G 746 /* If it's 10G, we need to issue reset through one of the MMDs */ 747 if (is_10g_interface(phydev->interface)) { 748 if (!phydev->mmds) 749 gen10g_discover_mmds(phydev); 750 751 devad = ffs(phydev->mmds) - 1; 752 } 753 #endif 754 755 if (phy_write(phydev, devad, MII_BMCR, BMCR_RESET) < 0) { 756 debug("PHY reset failed\n"); 757 return -1; 758 } 759 760 #ifdef CONFIG_PHY_RESET_DELAY 761 udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */ 762 #endif 763 /* 764 * Poll the control register for the reset bit to go to 0 (it is 765 * auto-clearing). This should happen within 0.5 seconds per the 766 * IEEE spec. 767 */ 768 reg = phy_read(phydev, devad, MII_BMCR); 769 while ((reg & BMCR_RESET) && timeout--) { 770 reg = phy_read(phydev, devad, MII_BMCR); 771 772 if (reg < 0) { 773 debug("PHY status read failed\n"); 774 return -1; 775 } 776 udelay(1000); 777 } 778 779 if (reg & BMCR_RESET) { 780 puts("PHY reset timed out\n"); 781 return -1; 782 } 783 784 return 0; 785 } 786 787 int miiphy_reset(const char *devname, unsigned char addr) 788 { 789 struct mii_dev *bus = miiphy_get_dev_by_name(devname); 790 struct phy_device *phydev; 791 792 /* 793 * miiphy_reset was only used on standard PHYs, so we'll fake it here. 794 * If later code tries to connect with the right interface, this will 795 * be corrected by get_phy_device in phy_connect() 796 */ 797 phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII); 798 799 return phy_reset(phydev); 800 } 801 802 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask, 803 phy_interface_t interface) 804 { 805 /* Reset the bus */ 806 if (bus->reset) { 807 bus->reset(bus); 808 809 /* Wait 15ms to make sure the PHY has come out of hard reset */ 810 udelay(15000); 811 } 812 813 return get_phy_device_by_mask(bus, phy_mask, interface); 814 } 815 816 #ifdef CONFIG_DM_ETH 817 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev) 818 #else 819 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev) 820 #endif 821 { 822 /* Soft Reset the PHY */ 823 phy_reset(phydev); 824 if (phydev->dev && phydev->dev != dev) { 825 printf("%s:%d is connected to %s. Reconnecting to %s\n", 826 phydev->bus->name, phydev->addr, 827 phydev->dev->name, dev->name); 828 } 829 phydev->dev = dev; 830 debug("%s connected to %s\n", dev->name, phydev->drv->name); 831 } 832 833 #ifdef CONFIG_DM_ETH 834 struct phy_device *phy_connect(struct mii_dev *bus, int addr, 835 struct udevice *dev, phy_interface_t interface) 836 #else 837 struct phy_device *phy_connect(struct mii_dev *bus, int addr, 838 struct eth_device *dev, phy_interface_t interface) 839 #endif 840 { 841 struct phy_device *phydev; 842 843 phydev = phy_find_by_mask(bus, 1 << addr, interface); 844 if (phydev) 845 phy_connect_dev(phydev, dev); 846 else 847 printf("Could not get PHY for %s: addr %d\n", bus->name, addr); 848 return phydev; 849 } 850 851 /* 852 * Start the PHY. Returns 0 on success, or a negative error code. 853 */ 854 int phy_startup(struct phy_device *phydev) 855 { 856 if (phydev->drv->startup) 857 return phydev->drv->startup(phydev); 858 859 return 0; 860 } 861 862 __weak int board_phy_config(struct phy_device *phydev) 863 { 864 if (phydev->drv->config) 865 return phydev->drv->config(phydev); 866 return 0; 867 } 868 869 int phy_config(struct phy_device *phydev) 870 { 871 /* Invoke an optional board-specific helper */ 872 board_phy_config(phydev); 873 874 return 0; 875 } 876 877 int phy_shutdown(struct phy_device *phydev) 878 { 879 if (phydev->drv->shutdown) 880 phydev->drv->shutdown(phydev); 881 882 return 0; 883 } 884 885 int phy_get_interface_by_name(const char *str) 886 { 887 int i; 888 889 for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) { 890 if (!strcmp(str, phy_interface_strings[i])) 891 return i; 892 } 893 894 return -1; 895 } 896