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 = BMCR_ANRESTART; 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 ((phydev->autoneg == AUTONEG_ENABLE) && 239 !(mii_reg & BMSR_ANEGCOMPLETE)) { 240 int i = 0; 241 242 printf("%s Waiting for PHY auto negotiation to complete", 243 phydev->dev->name); 244 while (!(mii_reg & BMSR_ANEGCOMPLETE)) { 245 /* 246 * Timeout reached ? 247 */ 248 if (i > PHY_ANEG_TIMEOUT) { 249 printf(" TIMEOUT !\n"); 250 phydev->link = 0; 251 return -ETIMEDOUT; 252 } 253 254 if (ctrlc()) { 255 puts("user interrupt!\n"); 256 phydev->link = 0; 257 return -EINTR; 258 } 259 260 if ((i++ % 500) == 0) 261 printf("."); 262 263 udelay(1000); /* 1 ms */ 264 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR); 265 } 266 printf(" done\n"); 267 phydev->link = 1; 268 } else { 269 /* Read the link a second time to clear the latched state */ 270 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR); 271 272 if (mii_reg & BMSR_LSTATUS) 273 phydev->link = 1; 274 else 275 phydev->link = 0; 276 } 277 278 return 0; 279 } 280 281 /* 282 * Generic function which updates the speed and duplex. If 283 * autonegotiation is enabled, it uses the AND of the link 284 * partner's advertised capabilities and our advertised 285 * capabilities. If autonegotiation is disabled, we use the 286 * appropriate bits in the control register. 287 * 288 * Stolen from Linux's mii.c and phy_device.c 289 */ 290 int genphy_parse_link(struct phy_device *phydev) 291 { 292 int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR); 293 294 /* We're using autonegotiation */ 295 if (phydev->autoneg == AUTONEG_ENABLE) { 296 u32 lpa = 0; 297 int gblpa = 0; 298 u32 estatus = 0; 299 300 /* Check for gigabit capability */ 301 if (phydev->supported & (SUPPORTED_1000baseT_Full | 302 SUPPORTED_1000baseT_Half)) { 303 /* We want a list of states supported by 304 * both PHYs in the link 305 */ 306 gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000); 307 if (gblpa < 0) { 308 debug("Could not read MII_STAT1000. Ignoring gigabit capability\n"); 309 gblpa = 0; 310 } 311 gblpa &= phy_read(phydev, 312 MDIO_DEVAD_NONE, MII_CTRL1000) << 2; 313 } 314 315 /* Set the baseline so we only have to set them 316 * if they're different 317 */ 318 phydev->speed = SPEED_10; 319 phydev->duplex = DUPLEX_HALF; 320 321 /* Check the gigabit fields */ 322 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) { 323 phydev->speed = SPEED_1000; 324 325 if (gblpa & PHY_1000BTSR_1000FD) 326 phydev->duplex = DUPLEX_FULL; 327 328 /* We're done! */ 329 return 0; 330 } 331 332 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE); 333 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA); 334 335 if (lpa & (LPA_100FULL | LPA_100HALF)) { 336 phydev->speed = SPEED_100; 337 338 if (lpa & LPA_100FULL) 339 phydev->duplex = DUPLEX_FULL; 340 341 } else if (lpa & LPA_10FULL) 342 phydev->duplex = DUPLEX_FULL; 343 344 /* 345 * Extended status may indicate that the PHY supports 346 * 1000BASE-T/X even though the 1000BASE-T registers 347 * are missing. In this case we can't tell whether the 348 * peer also supports it, so we only check extended 349 * status if the 1000BASE-T registers are actually 350 * missing. 351 */ 352 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP)) 353 estatus = phy_read(phydev, MDIO_DEVAD_NONE, 354 MII_ESTATUS); 355 356 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF | 357 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) { 358 phydev->speed = SPEED_1000; 359 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL)) 360 phydev->duplex = DUPLEX_FULL; 361 } 362 363 } else { 364 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR); 365 366 phydev->speed = SPEED_10; 367 phydev->duplex = DUPLEX_HALF; 368 369 if (bmcr & BMCR_FULLDPLX) 370 phydev->duplex = DUPLEX_FULL; 371 372 if (bmcr & BMCR_SPEED1000) 373 phydev->speed = SPEED_1000; 374 else if (bmcr & BMCR_SPEED100) 375 phydev->speed = SPEED_100; 376 } 377 378 return 0; 379 } 380 381 int genphy_config(struct phy_device *phydev) 382 { 383 int val; 384 u32 features; 385 386 features = (SUPPORTED_TP | SUPPORTED_MII 387 | SUPPORTED_AUI | SUPPORTED_FIBRE | 388 SUPPORTED_BNC); 389 390 /* Do we support autonegotiation? */ 391 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR); 392 393 if (val < 0) 394 return val; 395 396 if (val & BMSR_ANEGCAPABLE) 397 features |= SUPPORTED_Autoneg; 398 399 if (val & BMSR_100FULL) 400 features |= SUPPORTED_100baseT_Full; 401 if (val & BMSR_100HALF) 402 features |= SUPPORTED_100baseT_Half; 403 if (val & BMSR_10FULL) 404 features |= SUPPORTED_10baseT_Full; 405 if (val & BMSR_10HALF) 406 features |= SUPPORTED_10baseT_Half; 407 408 if (val & BMSR_ESTATEN) { 409 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS); 410 411 if (val < 0) 412 return val; 413 414 if (val & ESTATUS_1000_TFULL) 415 features |= SUPPORTED_1000baseT_Full; 416 if (val & ESTATUS_1000_THALF) 417 features |= SUPPORTED_1000baseT_Half; 418 if (val & ESTATUS_1000_XFULL) 419 features |= SUPPORTED_1000baseX_Full; 420 if (val & ESTATUS_1000_XHALF) 421 features |= SUPPORTED_1000baseX_Half; 422 } 423 424 phydev->supported &= features; 425 phydev->advertising &= features; 426 427 genphy_config_aneg(phydev); 428 429 return 0; 430 } 431 432 int genphy_startup(struct phy_device *phydev) 433 { 434 int ret; 435 436 ret = genphy_update_link(phydev); 437 if (ret) 438 return ret; 439 440 return genphy_parse_link(phydev); 441 } 442 443 int genphy_shutdown(struct phy_device *phydev) 444 { 445 return 0; 446 } 447 448 static struct phy_driver genphy_driver = { 449 .uid = 0xffffffff, 450 .mask = 0xffffffff, 451 .name = "Generic PHY", 452 .features = PHY_GBIT_FEATURES | SUPPORTED_MII | 453 SUPPORTED_AUI | SUPPORTED_FIBRE | 454 SUPPORTED_BNC, 455 .config = genphy_config, 456 .startup = genphy_startup, 457 .shutdown = genphy_shutdown, 458 }; 459 460 static LIST_HEAD(phy_drivers); 461 462 int phy_init(void) 463 { 464 #ifdef CONFIG_MV88E61XX_SWITCH 465 phy_mv88e61xx_init(); 466 #endif 467 #ifdef CONFIG_PHY_AQUANTIA 468 phy_aquantia_init(); 469 #endif 470 #ifdef CONFIG_PHY_ATHEROS 471 phy_atheros_init(); 472 #endif 473 #ifdef CONFIG_PHY_BROADCOM 474 phy_broadcom_init(); 475 #endif 476 #ifdef CONFIG_PHY_CORTINA 477 phy_cortina_init(); 478 #endif 479 #ifdef CONFIG_PHY_DAVICOM 480 phy_davicom_init(); 481 #endif 482 #ifdef CONFIG_PHY_ET1011C 483 phy_et1011c_init(); 484 #endif 485 #ifdef CONFIG_PHY_LXT 486 phy_lxt_init(); 487 #endif 488 #ifdef CONFIG_PHY_MARVELL 489 phy_marvell_init(); 490 #endif 491 #ifdef CONFIG_PHY_MICREL 492 phy_micrel_init(); 493 #endif 494 #ifdef CONFIG_PHY_NATSEMI 495 phy_natsemi_init(); 496 #endif 497 #ifdef CONFIG_PHY_REALTEK 498 phy_realtek_init(); 499 #endif 500 #ifdef CONFIG_PHY_SMSC 501 phy_smsc_init(); 502 #endif 503 #ifdef CONFIG_PHY_TERANETICS 504 phy_teranetics_init(); 505 #endif 506 #ifdef CONFIG_PHY_TI 507 phy_ti_init(); 508 #endif 509 #ifdef CONFIG_PHY_VITESSE 510 phy_vitesse_init(); 511 #endif 512 #ifdef CONFIG_PHY_XILINX 513 phy_xilinx_init(); 514 #endif 515 #ifdef CONFIG_PHY_MSCC 516 phy_mscc_init(); 517 #endif 518 519 return 0; 520 } 521 522 int phy_register(struct phy_driver *drv) 523 { 524 INIT_LIST_HEAD(&drv->list); 525 list_add_tail(&drv->list, &phy_drivers); 526 527 #ifdef CONFIG_NEEDS_MANUAL_RELOC 528 if (drv->probe) 529 drv->probe += gd->reloc_off; 530 if (drv->config) 531 drv->config += gd->reloc_off; 532 if (drv->startup) 533 drv->startup += gd->reloc_off; 534 if (drv->shutdown) 535 drv->shutdown += gd->reloc_off; 536 if (drv->readext) 537 drv->readext += gd->reloc_off; 538 if (drv->writeext) 539 drv->writeext += gd->reloc_off; 540 #endif 541 return 0; 542 } 543 544 int phy_set_supported(struct phy_device *phydev, u32 max_speed) 545 { 546 /* The default values for phydev->supported are provided by the PHY 547 * driver "features" member, we want to reset to sane defaults first 548 * before supporting higher speeds. 549 */ 550 phydev->supported &= PHY_DEFAULT_FEATURES; 551 552 switch (max_speed) { 553 default: 554 return -ENOTSUPP; 555 case SPEED_1000: 556 phydev->supported |= PHY_1000BT_FEATURES; 557 /* fall through */ 558 case SPEED_100: 559 phydev->supported |= PHY_100BT_FEATURES; 560 /* fall through */ 561 case SPEED_10: 562 phydev->supported |= PHY_10BT_FEATURES; 563 } 564 565 return 0; 566 } 567 568 static int phy_probe(struct phy_device *phydev) 569 { 570 int err = 0; 571 572 phydev->advertising = phydev->supported = phydev->drv->features; 573 phydev->mmds = phydev->drv->mmds; 574 575 if (phydev->drv->probe) 576 err = phydev->drv->probe(phydev); 577 578 return err; 579 } 580 581 static struct phy_driver *generic_for_interface(phy_interface_t interface) 582 { 583 #ifdef CONFIG_PHYLIB_10G 584 if (is_10g_interface(interface)) 585 return &gen10g_driver; 586 #endif 587 588 return &genphy_driver; 589 } 590 591 static struct phy_driver *get_phy_driver(struct phy_device *phydev, 592 phy_interface_t interface) 593 { 594 struct list_head *entry; 595 int phy_id = phydev->phy_id; 596 struct phy_driver *drv = NULL; 597 598 list_for_each(entry, &phy_drivers) { 599 drv = list_entry(entry, struct phy_driver, list); 600 if ((drv->uid & drv->mask) == (phy_id & drv->mask)) 601 return drv; 602 } 603 604 /* If we made it here, there's no driver for this PHY */ 605 return generic_for_interface(interface); 606 } 607 608 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr, 609 u32 phy_id, 610 phy_interface_t interface) 611 { 612 struct phy_device *dev; 613 614 /* We allocate the device, and initialize the 615 * default values */ 616 dev = malloc(sizeof(*dev)); 617 if (!dev) { 618 printf("Failed to allocate PHY device for %s:%d\n", 619 bus->name, addr); 620 return NULL; 621 } 622 623 memset(dev, 0, sizeof(*dev)); 624 625 dev->duplex = -1; 626 dev->link = 0; 627 dev->interface = interface; 628 629 dev->autoneg = AUTONEG_ENABLE; 630 631 dev->addr = addr; 632 dev->phy_id = phy_id; 633 dev->bus = bus; 634 635 dev->drv = get_phy_driver(dev, interface); 636 637 phy_probe(dev); 638 639 bus->phymap[addr] = dev; 640 641 return dev; 642 } 643 644 /** 645 * get_phy_id - reads the specified addr for its ID. 646 * @bus: the target MII bus 647 * @addr: PHY address on the MII bus 648 * @phy_id: where to store the ID retrieved. 649 * 650 * Description: Reads the ID registers of the PHY at @addr on the 651 * @bus, stores it in @phy_id and returns zero on success. 652 */ 653 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id) 654 { 655 int phy_reg; 656 657 /* Grab the bits from PHYIR1, and put them 658 * in the upper half */ 659 phy_reg = bus->read(bus, addr, devad, MII_PHYSID1); 660 661 if (phy_reg < 0) 662 return -EIO; 663 664 *phy_id = (phy_reg & 0xffff) << 16; 665 666 /* Grab the bits from PHYIR2, and put them in the lower half */ 667 phy_reg = bus->read(bus, addr, devad, MII_PHYSID2); 668 669 if (phy_reg < 0) 670 return -EIO; 671 672 *phy_id |= (phy_reg & 0xffff); 673 674 return 0; 675 } 676 677 static struct phy_device *create_phy_by_mask(struct mii_dev *bus, 678 unsigned phy_mask, int devad, phy_interface_t interface) 679 { 680 u32 phy_id = 0xffffffff; 681 while (phy_mask) { 682 int addr = ffs(phy_mask) - 1; 683 int r = get_phy_id(bus, addr, devad, &phy_id); 684 /* If the PHY ID is mostly f's, we didn't find anything */ 685 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff) 686 return phy_device_create(bus, addr, phy_id, interface); 687 phy_mask &= ~(1 << addr); 688 } 689 return NULL; 690 } 691 692 static struct phy_device *search_for_existing_phy(struct mii_dev *bus, 693 unsigned phy_mask, phy_interface_t interface) 694 { 695 /* If we have one, return the existing device, with new interface */ 696 while (phy_mask) { 697 int addr = ffs(phy_mask) - 1; 698 if (bus->phymap[addr]) { 699 bus->phymap[addr]->interface = interface; 700 return bus->phymap[addr]; 701 } 702 phy_mask &= ~(1 << addr); 703 } 704 return NULL; 705 } 706 707 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus, 708 unsigned phy_mask, phy_interface_t interface) 709 { 710 int i; 711 struct phy_device *phydev; 712 713 phydev = search_for_existing_phy(bus, phy_mask, interface); 714 if (phydev) 715 return phydev; 716 /* Try Standard (ie Clause 22) access */ 717 /* Otherwise we have to try Clause 45 */ 718 for (i = 0; i < 5; i++) { 719 phydev = create_phy_by_mask(bus, phy_mask, 720 i ? i : MDIO_DEVAD_NONE, interface); 721 if (IS_ERR(phydev)) 722 return NULL; 723 if (phydev) 724 return phydev; 725 } 726 727 debug("\n%s PHY: ", bus->name); 728 while (phy_mask) { 729 int addr = ffs(phy_mask) - 1; 730 debug("%d ", addr); 731 phy_mask &= ~(1 << addr); 732 } 733 debug("not found\n"); 734 735 return NULL; 736 } 737 738 /** 739 * get_phy_device - reads the specified PHY device and returns its @phy_device struct 740 * @bus: the target MII bus 741 * @addr: PHY address on the MII bus 742 * 743 * Description: Reads the ID registers of the PHY at @addr on the 744 * @bus, then allocates and returns the phy_device to represent it. 745 */ 746 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr, 747 phy_interface_t interface) 748 { 749 return get_phy_device_by_mask(bus, 1 << addr, interface); 750 } 751 752 int phy_reset(struct phy_device *phydev) 753 { 754 int reg; 755 int timeout = 500; 756 int devad = MDIO_DEVAD_NONE; 757 758 if (phydev->flags & PHY_FLAG_BROKEN_RESET) 759 return 0; 760 761 #ifdef CONFIG_PHYLIB_10G 762 /* If it's 10G, we need to issue reset through one of the MMDs */ 763 if (is_10g_interface(phydev->interface)) { 764 if (!phydev->mmds) 765 gen10g_discover_mmds(phydev); 766 767 devad = ffs(phydev->mmds) - 1; 768 } 769 #endif 770 771 if (phy_write(phydev, devad, MII_BMCR, BMCR_RESET) < 0) { 772 debug("PHY reset failed\n"); 773 return -1; 774 } 775 776 #ifdef CONFIG_PHY_RESET_DELAY 777 udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */ 778 #endif 779 /* 780 * Poll the control register for the reset bit to go to 0 (it is 781 * auto-clearing). This should happen within 0.5 seconds per the 782 * IEEE spec. 783 */ 784 reg = phy_read(phydev, devad, MII_BMCR); 785 while ((reg & BMCR_RESET) && timeout--) { 786 reg = phy_read(phydev, devad, MII_BMCR); 787 788 if (reg < 0) { 789 debug("PHY status read failed\n"); 790 return -1; 791 } 792 udelay(1000); 793 } 794 795 if (reg & BMCR_RESET) { 796 puts("PHY reset timed out\n"); 797 return -1; 798 } 799 800 return 0; 801 } 802 803 int miiphy_reset(const char *devname, unsigned char addr) 804 { 805 struct mii_dev *bus = miiphy_get_dev_by_name(devname); 806 struct phy_device *phydev; 807 808 /* 809 * miiphy_reset was only used on standard PHYs, so we'll fake it here. 810 * If later code tries to connect with the right interface, this will 811 * be corrected by get_phy_device in phy_connect() 812 */ 813 phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII); 814 815 return phy_reset(phydev); 816 } 817 818 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask, 819 phy_interface_t interface) 820 { 821 /* Reset the bus */ 822 if (bus->reset) { 823 bus->reset(bus); 824 825 /* Wait 15ms to make sure the PHY has come out of hard reset */ 826 udelay(15000); 827 } 828 829 return get_phy_device_by_mask(bus, phy_mask, interface); 830 } 831 832 #ifdef CONFIG_DM_ETH 833 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev) 834 #else 835 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev) 836 #endif 837 { 838 /* Soft Reset the PHY */ 839 phy_reset(phydev); 840 if (phydev->dev && phydev->dev != dev) { 841 printf("%s:%d is connected to %s. Reconnecting to %s\n", 842 phydev->bus->name, phydev->addr, 843 phydev->dev->name, dev->name); 844 } 845 phydev->dev = dev; 846 debug("%s connected to %s\n", dev->name, phydev->drv->name); 847 } 848 849 #ifdef CONFIG_DM_ETH 850 struct phy_device *phy_connect(struct mii_dev *bus, int addr, 851 struct udevice *dev, phy_interface_t interface) 852 #else 853 struct phy_device *phy_connect(struct mii_dev *bus, int addr, 854 struct eth_device *dev, phy_interface_t interface) 855 #endif 856 { 857 struct phy_device *phydev; 858 859 phydev = phy_find_by_mask(bus, 1 << addr, interface); 860 if (phydev) 861 phy_connect_dev(phydev, dev); 862 else 863 printf("Could not get PHY for %s: addr %d\n", bus->name, addr); 864 return phydev; 865 } 866 867 /* 868 * Start the PHY. Returns 0 on success, or a negative error code. 869 */ 870 int phy_startup(struct phy_device *phydev) 871 { 872 if (phydev->drv->startup) 873 return phydev->drv->startup(phydev); 874 875 return 0; 876 } 877 878 __weak int board_phy_config(struct phy_device *phydev) 879 { 880 if (phydev->drv->config) 881 return phydev->drv->config(phydev); 882 return 0; 883 } 884 885 int phy_config(struct phy_device *phydev) 886 { 887 /* Invoke an optional board-specific helper */ 888 return board_phy_config(phydev); 889 } 890 891 int phy_shutdown(struct phy_device *phydev) 892 { 893 if (phydev->drv->shutdown) 894 phydev->drv->shutdown(phydev); 895 896 return 0; 897 } 898 899 int phy_get_interface_by_name(const char *str) 900 { 901 int i; 902 903 for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) { 904 if (!strcmp(str, phy_interface_strings[i])) 905 return i; 906 } 907 908 return -1; 909 } 910