1 /* 2 * drivers/net/phy/phy.c 3 * 4 * Framework for configuring and reading PHY devices 5 * Based on code in sungem_phy.c and gianfar_phy.c 6 * 7 * Author: Andy Fleming 8 * 9 * Copyright (c) 2004 Freescale Semiconductor, Inc. 10 * 11 * This program is free software; you can redistribute it and/or modify it 12 * under the terms of the GNU General Public License as published by the 13 * Free Software Foundation; either version 2 of the License, or (at your 14 * option) any later version. 15 * 16 */ 17 #include <linux/config.h> 18 #include <linux/kernel.h> 19 #include <linux/sched.h> 20 #include <linux/string.h> 21 #include <linux/errno.h> 22 #include <linux/unistd.h> 23 #include <linux/slab.h> 24 #include <linux/interrupt.h> 25 #include <linux/init.h> 26 #include <linux/delay.h> 27 #include <linux/netdevice.h> 28 #include <linux/etherdevice.h> 29 #include <linux/skbuff.h> 30 #include <linux/spinlock.h> 31 #include <linux/mm.h> 32 #include <linux/module.h> 33 #include <linux/mii.h> 34 #include <linux/ethtool.h> 35 #include <linux/phy.h> 36 37 #include <asm/io.h> 38 #include <asm/irq.h> 39 #include <asm/uaccess.h> 40 41 /* Convenience function to print out the current phy status 42 */ 43 void phy_print_status(struct phy_device *phydev) 44 { 45 pr_info("PHY: %s - Link is %s", phydev->dev.bus_id, 46 phydev->link ? "Up" : "Down"); 47 if (phydev->link) 48 printk(" - %d/%s", phydev->speed, 49 DUPLEX_FULL == phydev->duplex ? 50 "Full" : "Half"); 51 52 printk("\n"); 53 } 54 EXPORT_SYMBOL(phy_print_status); 55 56 57 /* Convenience functions for reading/writing a given PHY 58 * register. They MUST NOT be called from interrupt context, 59 * because the bus read/write functions may wait for an interrupt 60 * to conclude the operation. */ 61 int phy_read(struct phy_device *phydev, u16 regnum) 62 { 63 int retval; 64 struct mii_bus *bus = phydev->bus; 65 66 spin_lock_bh(&bus->mdio_lock); 67 retval = bus->read(bus, phydev->addr, regnum); 68 spin_unlock_bh(&bus->mdio_lock); 69 70 return retval; 71 } 72 EXPORT_SYMBOL(phy_read); 73 74 int phy_write(struct phy_device *phydev, u16 regnum, u16 val) 75 { 76 int err; 77 struct mii_bus *bus = phydev->bus; 78 79 spin_lock_bh(&bus->mdio_lock); 80 err = bus->write(bus, phydev->addr, regnum, val); 81 spin_unlock_bh(&bus->mdio_lock); 82 83 return err; 84 } 85 EXPORT_SYMBOL(phy_write); 86 87 88 int phy_clear_interrupt(struct phy_device *phydev) 89 { 90 int err = 0; 91 92 if (phydev->drv->ack_interrupt) 93 err = phydev->drv->ack_interrupt(phydev); 94 95 return err; 96 } 97 98 99 int phy_config_interrupt(struct phy_device *phydev, u32 interrupts) 100 { 101 int err = 0; 102 103 phydev->interrupts = interrupts; 104 if (phydev->drv->config_intr) 105 err = phydev->drv->config_intr(phydev); 106 107 return err; 108 } 109 110 111 /* phy_aneg_done 112 * 113 * description: Reads the status register and returns 0 either if 114 * auto-negotiation is incomplete, or if there was an error. 115 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. 116 */ 117 static inline int phy_aneg_done(struct phy_device *phydev) 118 { 119 int retval; 120 121 retval = phy_read(phydev, MII_BMSR); 122 123 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); 124 } 125 126 /* A structure for mapping a particular speed and duplex 127 * combination to a particular SUPPORTED and ADVERTISED value */ 128 struct phy_setting { 129 int speed; 130 int duplex; 131 u32 setting; 132 }; 133 134 /* A mapping of all SUPPORTED settings to speed/duplex */ 135 static const struct phy_setting settings[] = { 136 { 137 .speed = 10000, 138 .duplex = DUPLEX_FULL, 139 .setting = SUPPORTED_10000baseT_Full, 140 }, 141 { 142 .speed = SPEED_1000, 143 .duplex = DUPLEX_FULL, 144 .setting = SUPPORTED_1000baseT_Full, 145 }, 146 { 147 .speed = SPEED_1000, 148 .duplex = DUPLEX_HALF, 149 .setting = SUPPORTED_1000baseT_Half, 150 }, 151 { 152 .speed = SPEED_100, 153 .duplex = DUPLEX_FULL, 154 .setting = SUPPORTED_100baseT_Full, 155 }, 156 { 157 .speed = SPEED_100, 158 .duplex = DUPLEX_HALF, 159 .setting = SUPPORTED_100baseT_Half, 160 }, 161 { 162 .speed = SPEED_10, 163 .duplex = DUPLEX_FULL, 164 .setting = SUPPORTED_10baseT_Full, 165 }, 166 { 167 .speed = SPEED_10, 168 .duplex = DUPLEX_HALF, 169 .setting = SUPPORTED_10baseT_Half, 170 }, 171 }; 172 173 #define MAX_NUM_SETTINGS (sizeof(settings)/sizeof(struct phy_setting)) 174 175 /* phy_find_setting 176 * 177 * description: Searches the settings array for the setting which 178 * matches the desired speed and duplex, and returns the index 179 * of that setting. Returns the index of the last setting if 180 * none of the others match. 181 */ 182 static inline int phy_find_setting(int speed, int duplex) 183 { 184 int idx = 0; 185 186 while (idx < ARRAY_SIZE(settings) && 187 (settings[idx].speed != speed || 188 settings[idx].duplex != duplex)) 189 idx++; 190 191 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1; 192 } 193 194 /* phy_find_valid 195 * idx: The first index in settings[] to search 196 * features: A mask of the valid settings 197 * 198 * description: Returns the index of the first valid setting less 199 * than or equal to the one pointed to by idx, as determined by 200 * the mask in features. Returns the index of the last setting 201 * if nothing else matches. 202 */ 203 static inline int phy_find_valid(int idx, u32 features) 204 { 205 while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features)) 206 idx++; 207 208 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1; 209 } 210 211 /* phy_sanitize_settings 212 * 213 * description: Make sure the PHY is set to supported speeds and 214 * duplexes. Drop down by one in this order: 1000/FULL, 215 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF 216 */ 217 void phy_sanitize_settings(struct phy_device *phydev) 218 { 219 u32 features = phydev->supported; 220 int idx; 221 222 /* Sanitize settings based on PHY capabilities */ 223 if ((features & SUPPORTED_Autoneg) == 0) 224 phydev->autoneg = 0; 225 226 idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex), 227 features); 228 229 phydev->speed = settings[idx].speed; 230 phydev->duplex = settings[idx].duplex; 231 } 232 EXPORT_SYMBOL(phy_sanitize_settings); 233 234 /* phy_ethtool_sset: 235 * A generic ethtool sset function. Handles all the details 236 * 237 * A few notes about parameter checking: 238 * - We don't set port or transceiver, so we don't care what they 239 * were set to. 240 * - phy_start_aneg() will make sure forced settings are sane, and 241 * choose the next best ones from the ones selected, so we don't 242 * care if ethtool tries to give us bad values 243 * 244 */ 245 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd) 246 { 247 if (cmd->phy_address != phydev->addr) 248 return -EINVAL; 249 250 /* We make sure that we don't pass unsupported 251 * values in to the PHY */ 252 cmd->advertising &= phydev->supported; 253 254 /* Verify the settings we care about. */ 255 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE) 256 return -EINVAL; 257 258 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0) 259 return -EINVAL; 260 261 if (cmd->autoneg == AUTONEG_DISABLE 262 && ((cmd->speed != SPEED_1000 263 && cmd->speed != SPEED_100 264 && cmd->speed != SPEED_10) 265 || (cmd->duplex != DUPLEX_HALF 266 && cmd->duplex != DUPLEX_FULL))) 267 return -EINVAL; 268 269 phydev->autoneg = cmd->autoneg; 270 271 phydev->speed = cmd->speed; 272 273 phydev->advertising = cmd->advertising; 274 275 if (AUTONEG_ENABLE == cmd->autoneg) 276 phydev->advertising |= ADVERTISED_Autoneg; 277 else 278 phydev->advertising &= ~ADVERTISED_Autoneg; 279 280 phydev->duplex = cmd->duplex; 281 282 /* Restart the PHY */ 283 phy_start_aneg(phydev); 284 285 return 0; 286 } 287 288 int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd) 289 { 290 cmd->supported = phydev->supported; 291 292 cmd->advertising = phydev->advertising; 293 294 cmd->speed = phydev->speed; 295 cmd->duplex = phydev->duplex; 296 cmd->port = PORT_MII; 297 cmd->phy_address = phydev->addr; 298 cmd->transceiver = XCVR_EXTERNAL; 299 cmd->autoneg = phydev->autoneg; 300 301 return 0; 302 } 303 304 305 /* Note that this function is currently incompatible with the 306 * PHYCONTROL layer. It changes registers without regard to 307 * current state. Use at own risk 308 */ 309 int phy_mii_ioctl(struct phy_device *phydev, 310 struct mii_ioctl_data *mii_data, int cmd) 311 { 312 u16 val = mii_data->val_in; 313 314 switch (cmd) { 315 case SIOCGMIIPHY: 316 mii_data->phy_id = phydev->addr; 317 break; 318 case SIOCGMIIREG: 319 mii_data->val_out = phy_read(phydev, mii_data->reg_num); 320 break; 321 322 case SIOCSMIIREG: 323 if (!capable(CAP_NET_ADMIN)) 324 return -EPERM; 325 326 if (mii_data->phy_id == phydev->addr) { 327 switch(mii_data->reg_num) { 328 case MII_BMCR: 329 if (val & (BMCR_RESET|BMCR_ANENABLE)) 330 phydev->autoneg = AUTONEG_DISABLE; 331 else 332 phydev->autoneg = AUTONEG_ENABLE; 333 if ((!phydev->autoneg) && (val & BMCR_FULLDPLX)) 334 phydev->duplex = DUPLEX_FULL; 335 else 336 phydev->duplex = DUPLEX_HALF; 337 break; 338 case MII_ADVERTISE: 339 phydev->advertising = val; 340 break; 341 default: 342 /* do nothing */ 343 break; 344 } 345 } 346 347 phy_write(phydev, mii_data->reg_num, val); 348 349 if (mii_data->reg_num == MII_BMCR 350 && val & BMCR_RESET 351 && phydev->drv->config_init) 352 phydev->drv->config_init(phydev); 353 break; 354 } 355 356 return 0; 357 } 358 359 /* phy_start_aneg 360 * 361 * description: Sanitizes the settings (if we're not 362 * autonegotiating them), and then calls the driver's 363 * config_aneg function. If the PHYCONTROL Layer is operating, 364 * we change the state to reflect the beginning of 365 * Auto-negotiation or forcing. 366 */ 367 int phy_start_aneg(struct phy_device *phydev) 368 { 369 int err; 370 371 spin_lock(&phydev->lock); 372 373 if (AUTONEG_DISABLE == phydev->autoneg) 374 phy_sanitize_settings(phydev); 375 376 err = phydev->drv->config_aneg(phydev); 377 378 if (err < 0) 379 goto out_unlock; 380 381 if (phydev->state != PHY_HALTED) { 382 if (AUTONEG_ENABLE == phydev->autoneg) { 383 phydev->state = PHY_AN; 384 phydev->link_timeout = PHY_AN_TIMEOUT; 385 } else { 386 phydev->state = PHY_FORCING; 387 phydev->link_timeout = PHY_FORCE_TIMEOUT; 388 } 389 } 390 391 out_unlock: 392 spin_unlock(&phydev->lock); 393 return err; 394 } 395 EXPORT_SYMBOL(phy_start_aneg); 396 397 398 static void phy_change(void *data); 399 static void phy_timer(unsigned long data); 400 401 /* phy_start_machine: 402 * 403 * description: The PHY infrastructure can run a state machine 404 * which tracks whether the PHY is starting up, negotiating, 405 * etc. This function starts the timer which tracks the state 406 * of the PHY. If you want to be notified when the state 407 * changes, pass in the callback, otherwise, pass NULL. If you 408 * want to maintain your own state machine, do not call this 409 * function. */ 410 void phy_start_machine(struct phy_device *phydev, 411 void (*handler)(struct net_device *)) 412 { 413 phydev->adjust_state = handler; 414 415 init_timer(&phydev->phy_timer); 416 phydev->phy_timer.function = &phy_timer; 417 phydev->phy_timer.data = (unsigned long) phydev; 418 mod_timer(&phydev->phy_timer, jiffies + HZ); 419 } 420 421 /* phy_stop_machine 422 * 423 * description: Stops the state machine timer, sets the state to 424 * UP (unless it wasn't up yet), and then frees the interrupt, 425 * if it is in use. This function must be called BEFORE 426 * phy_detach. 427 */ 428 void phy_stop_machine(struct phy_device *phydev) 429 { 430 del_timer_sync(&phydev->phy_timer); 431 432 spin_lock(&phydev->lock); 433 if (phydev->state > PHY_UP) 434 phydev->state = PHY_UP; 435 spin_unlock(&phydev->lock); 436 437 if (phydev->irq != PHY_POLL) 438 phy_stop_interrupts(phydev); 439 440 phydev->adjust_state = NULL; 441 } 442 443 /* phy_force_reduction 444 * 445 * description: Reduces the speed/duplex settings by 446 * one notch. The order is so: 447 * 1000/FULL, 1000/HALF, 100/FULL, 100/HALF, 448 * 10/FULL, 10/HALF. The function bottoms out at 10/HALF. 449 */ 450 static void phy_force_reduction(struct phy_device *phydev) 451 { 452 int idx; 453 454 idx = phy_find_setting(phydev->speed, phydev->duplex); 455 456 idx++; 457 458 idx = phy_find_valid(idx, phydev->supported); 459 460 phydev->speed = settings[idx].speed; 461 phydev->duplex = settings[idx].duplex; 462 463 pr_info("Trying %d/%s\n", phydev->speed, 464 DUPLEX_FULL == phydev->duplex ? 465 "FULL" : "HALF"); 466 } 467 468 469 /* phy_error: 470 * 471 * Moves the PHY to the HALTED state in response to a read 472 * or write error, and tells the controller the link is down. 473 * Must not be called from interrupt context, or while the 474 * phydev->lock is held. 475 */ 476 void phy_error(struct phy_device *phydev) 477 { 478 spin_lock(&phydev->lock); 479 phydev->state = PHY_HALTED; 480 spin_unlock(&phydev->lock); 481 } 482 483 /* phy_interrupt 484 * 485 * description: When a PHY interrupt occurs, the handler disables 486 * interrupts, and schedules a work task to clear the interrupt. 487 */ 488 static irqreturn_t phy_interrupt(int irq, void *phy_dat, struct pt_regs *regs) 489 { 490 struct phy_device *phydev = phy_dat; 491 492 /* The MDIO bus is not allowed to be written in interrupt 493 * context, so we need to disable the irq here. A work 494 * queue will write the PHY to disable and clear the 495 * interrupt, and then reenable the irq line. */ 496 disable_irq_nosync(irq); 497 498 schedule_work(&phydev->phy_queue); 499 500 return IRQ_HANDLED; 501 } 502 503 /* Enable the interrupts from the PHY side */ 504 int phy_enable_interrupts(struct phy_device *phydev) 505 { 506 int err; 507 508 err = phy_clear_interrupt(phydev); 509 510 if (err < 0) 511 return err; 512 513 err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); 514 515 return err; 516 } 517 EXPORT_SYMBOL(phy_enable_interrupts); 518 519 /* Disable the PHY interrupts from the PHY side */ 520 int phy_disable_interrupts(struct phy_device *phydev) 521 { 522 int err; 523 524 /* Disable PHY interrupts */ 525 err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); 526 527 if (err) 528 goto phy_err; 529 530 /* Clear the interrupt */ 531 err = phy_clear_interrupt(phydev); 532 533 if (err) 534 goto phy_err; 535 536 return 0; 537 538 phy_err: 539 phy_error(phydev); 540 541 return err; 542 } 543 EXPORT_SYMBOL(phy_disable_interrupts); 544 545 /* phy_start_interrupts 546 * 547 * description: Request the interrupt for the given PHY. If 548 * this fails, then we set irq to PHY_POLL. 549 * Otherwise, we enable the interrupts in the PHY. 550 * Returns 0 on success. 551 * This should only be called with a valid IRQ number. 552 */ 553 int phy_start_interrupts(struct phy_device *phydev) 554 { 555 int err = 0; 556 557 INIT_WORK(&phydev->phy_queue, phy_change, phydev); 558 559 if (request_irq(phydev->irq, phy_interrupt, 560 SA_SHIRQ, 561 "phy_interrupt", 562 phydev) < 0) { 563 printk(KERN_WARNING "%s: Can't get IRQ %d (PHY)\n", 564 phydev->bus->name, 565 phydev->irq); 566 phydev->irq = PHY_POLL; 567 return 0; 568 } 569 570 err = phy_enable_interrupts(phydev); 571 572 return err; 573 } 574 EXPORT_SYMBOL(phy_start_interrupts); 575 576 int phy_stop_interrupts(struct phy_device *phydev) 577 { 578 int err; 579 580 err = phy_disable_interrupts(phydev); 581 582 if (err) 583 phy_error(phydev); 584 585 free_irq(phydev->irq, phydev); 586 587 return err; 588 } 589 EXPORT_SYMBOL(phy_stop_interrupts); 590 591 592 /* Scheduled by the phy_interrupt/timer to handle PHY changes */ 593 static void phy_change(void *data) 594 { 595 int err; 596 struct phy_device *phydev = data; 597 598 err = phy_disable_interrupts(phydev); 599 600 if (err) 601 goto phy_err; 602 603 spin_lock(&phydev->lock); 604 if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state)) 605 phydev->state = PHY_CHANGELINK; 606 spin_unlock(&phydev->lock); 607 608 enable_irq(phydev->irq); 609 610 /* Reenable interrupts */ 611 err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); 612 613 if (err) 614 goto irq_enable_err; 615 616 return; 617 618 irq_enable_err: 619 disable_irq(phydev->irq); 620 phy_err: 621 phy_error(phydev); 622 } 623 624 /* Bring down the PHY link, and stop checking the status. */ 625 void phy_stop(struct phy_device *phydev) 626 { 627 spin_lock(&phydev->lock); 628 629 if (PHY_HALTED == phydev->state) 630 goto out_unlock; 631 632 if (phydev->irq != PHY_POLL) { 633 /* Clear any pending interrupts */ 634 phy_clear_interrupt(phydev); 635 636 /* Disable PHY Interrupts */ 637 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); 638 } 639 640 phydev->state = PHY_HALTED; 641 642 out_unlock: 643 spin_unlock(&phydev->lock); 644 } 645 646 647 /* phy_start 648 * 649 * description: Indicates the attached device's readiness to 650 * handle PHY-related work. Used during startup to start the 651 * PHY, and after a call to phy_stop() to resume operation. 652 * Also used to indicate the MDIO bus has cleared an error 653 * condition. 654 */ 655 void phy_start(struct phy_device *phydev) 656 { 657 spin_lock(&phydev->lock); 658 659 switch (phydev->state) { 660 case PHY_STARTING: 661 phydev->state = PHY_PENDING; 662 break; 663 case PHY_READY: 664 phydev->state = PHY_UP; 665 break; 666 case PHY_HALTED: 667 phydev->state = PHY_RESUMING; 668 default: 669 break; 670 } 671 spin_unlock(&phydev->lock); 672 } 673 EXPORT_SYMBOL(phy_stop); 674 EXPORT_SYMBOL(phy_start); 675 676 /* PHY timer which handles the state machine */ 677 static void phy_timer(unsigned long data) 678 { 679 struct phy_device *phydev = (struct phy_device *)data; 680 int needs_aneg = 0; 681 int err = 0; 682 683 spin_lock(&phydev->lock); 684 685 if (phydev->adjust_state) 686 phydev->adjust_state(phydev->attached_dev); 687 688 switch(phydev->state) { 689 case PHY_DOWN: 690 case PHY_STARTING: 691 case PHY_READY: 692 case PHY_PENDING: 693 break; 694 case PHY_UP: 695 needs_aneg = 1; 696 697 phydev->link_timeout = PHY_AN_TIMEOUT; 698 699 break; 700 case PHY_AN: 701 /* Check if negotiation is done. Break 702 * if there's an error */ 703 err = phy_aneg_done(phydev); 704 if (err < 0) 705 break; 706 707 /* If auto-negotiation is done, we change to 708 * either RUNNING, or NOLINK */ 709 if (err > 0) { 710 err = phy_read_status(phydev); 711 712 if (err) 713 break; 714 715 if (phydev->link) { 716 phydev->state = PHY_RUNNING; 717 netif_carrier_on(phydev->attached_dev); 718 } else { 719 phydev->state = PHY_NOLINK; 720 netif_carrier_off(phydev->attached_dev); 721 } 722 723 phydev->adjust_link(phydev->attached_dev); 724 725 } else if (0 == phydev->link_timeout--) { 726 /* The counter expired, so either we 727 * switch to forced mode, or the 728 * magic_aneg bit exists, and we try aneg 729 * again */ 730 if (!(phydev->drv->flags & PHY_HAS_MAGICANEG)) { 731 int idx; 732 733 /* We'll start from the 734 * fastest speed, and work 735 * our way down */ 736 idx = phy_find_valid(0, 737 phydev->supported); 738 739 phydev->speed = settings[idx].speed; 740 phydev->duplex = settings[idx].duplex; 741 742 phydev->autoneg = AUTONEG_DISABLE; 743 phydev->state = PHY_FORCING; 744 phydev->link_timeout = 745 PHY_FORCE_TIMEOUT; 746 747 pr_info("Trying %d/%s\n", 748 phydev->speed, 749 DUPLEX_FULL == 750 phydev->duplex ? 751 "FULL" : "HALF"); 752 } 753 754 needs_aneg = 1; 755 } 756 break; 757 case PHY_NOLINK: 758 err = phy_read_status(phydev); 759 760 if (err) 761 break; 762 763 if (phydev->link) { 764 phydev->state = PHY_RUNNING; 765 netif_carrier_on(phydev->attached_dev); 766 phydev->adjust_link(phydev->attached_dev); 767 } 768 break; 769 case PHY_FORCING: 770 err = phy_read_status(phydev); 771 772 if (err) 773 break; 774 775 if (phydev->link) { 776 phydev->state = PHY_RUNNING; 777 netif_carrier_on(phydev->attached_dev); 778 } else { 779 if (0 == phydev->link_timeout--) { 780 phy_force_reduction(phydev); 781 needs_aneg = 1; 782 } 783 } 784 785 phydev->adjust_link(phydev->attached_dev); 786 break; 787 case PHY_RUNNING: 788 /* Only register a CHANGE if we are 789 * polling */ 790 if (PHY_POLL == phydev->irq) 791 phydev->state = PHY_CHANGELINK; 792 break; 793 case PHY_CHANGELINK: 794 err = phy_read_status(phydev); 795 796 if (err) 797 break; 798 799 if (phydev->link) { 800 phydev->state = PHY_RUNNING; 801 netif_carrier_on(phydev->attached_dev); 802 } else { 803 phydev->state = PHY_NOLINK; 804 netif_carrier_off(phydev->attached_dev); 805 } 806 807 phydev->adjust_link(phydev->attached_dev); 808 809 if (PHY_POLL != phydev->irq) 810 err = phy_config_interrupt(phydev, 811 PHY_INTERRUPT_ENABLED); 812 break; 813 case PHY_HALTED: 814 if (phydev->link) { 815 phydev->link = 0; 816 netif_carrier_off(phydev->attached_dev); 817 phydev->adjust_link(phydev->attached_dev); 818 } 819 break; 820 case PHY_RESUMING: 821 822 err = phy_clear_interrupt(phydev); 823 824 if (err) 825 break; 826 827 err = phy_config_interrupt(phydev, 828 PHY_INTERRUPT_ENABLED); 829 830 if (err) 831 break; 832 833 if (AUTONEG_ENABLE == phydev->autoneg) { 834 err = phy_aneg_done(phydev); 835 if (err < 0) 836 break; 837 838 /* err > 0 if AN is done. 839 * Otherwise, it's 0, and we're 840 * still waiting for AN */ 841 if (err > 0) { 842 phydev->state = PHY_RUNNING; 843 } else { 844 phydev->state = PHY_AN; 845 phydev->link_timeout = PHY_AN_TIMEOUT; 846 } 847 } else 848 phydev->state = PHY_RUNNING; 849 break; 850 } 851 852 spin_unlock(&phydev->lock); 853 854 if (needs_aneg) 855 err = phy_start_aneg(phydev); 856 857 if (err < 0) 858 phy_error(phydev); 859 860 mod_timer(&phydev->phy_timer, jiffies + PHY_STATE_TIME * HZ); 861 } 862 863