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/version.h> 34 #include <linux/mii.h> 35 #include <linux/ethtool.h> 36 #include <linux/phy.h> 37 38 #include <asm/io.h> 39 #include <asm/irq.h> 40 #include <asm/uaccess.h> 41 42 /* Convenience function to print out the current phy status 43 */ 44 void phy_print_status(struct phy_device *phydev) 45 { 46 pr_info("%s: Link is %s", phydev->dev.bus_id, 47 phydev->link ? "Up" : "Down"); 48 if (phydev->link) 49 printk(" - %d/%s", phydev->speed, 50 DUPLEX_FULL == phydev->duplex ? 51 "Full" : "Half"); 52 53 printk("\n"); 54 } 55 EXPORT_SYMBOL(phy_print_status); 56 57 58 /* Convenience functions for reading/writing a given PHY 59 * register. They MUST NOT be called from interrupt context, 60 * because the bus read/write functions may wait for an interrupt 61 * to conclude the operation. */ 62 int phy_read(struct phy_device *phydev, u16 regnum) 63 { 64 int retval; 65 struct mii_bus *bus = phydev->bus; 66 67 spin_lock_bh(&bus->mdio_lock); 68 retval = bus->read(bus, phydev->addr, regnum); 69 spin_unlock_bh(&bus->mdio_lock); 70 71 return retval; 72 } 73 EXPORT_SYMBOL(phy_read); 74 75 int phy_write(struct phy_device *phydev, u16 regnum, u16 val) 76 { 77 int err; 78 struct mii_bus *bus = phydev->bus; 79 80 spin_lock_bh(&bus->mdio_lock); 81 err = bus->write(bus, phydev->addr, regnum, val); 82 spin_unlock_bh(&bus->mdio_lock); 83 84 return err; 85 } 86 EXPORT_SYMBOL(phy_write); 87 88 89 int phy_clear_interrupt(struct phy_device *phydev) 90 { 91 int err = 0; 92 93 if (phydev->drv->ack_interrupt) 94 err = phydev->drv->ack_interrupt(phydev); 95 96 return err; 97 } 98 99 100 int phy_config_interrupt(struct phy_device *phydev, u32 interrupts) 101 { 102 int err = 0; 103 104 phydev->interrupts = interrupts; 105 if (phydev->drv->config_intr) 106 err = phydev->drv->config_intr(phydev); 107 108 return err; 109 } 110 111 112 /* phy_aneg_done 113 * 114 * description: Reads the status register and returns 0 either if 115 * auto-negotiation is incomplete, or if there was an error. 116 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. 117 */ 118 static inline int phy_aneg_done(struct phy_device *phydev) 119 { 120 int retval; 121 122 retval = phy_read(phydev, MII_BMSR); 123 124 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); 125 } 126 127 /* A structure for mapping a particular speed and duplex 128 * combination to a particular SUPPORTED and ADVERTISED value */ 129 struct phy_setting { 130 int speed; 131 int duplex; 132 u32 setting; 133 }; 134 135 /* A mapping of all SUPPORTED settings to speed/duplex */ 136 static struct phy_setting settings[] = { 137 { 138 .speed = 10000, 139 .duplex = DUPLEX_FULL, 140 .setting = SUPPORTED_10000baseT_Full, 141 }, 142 { 143 .speed = SPEED_1000, 144 .duplex = DUPLEX_FULL, 145 .setting = SUPPORTED_1000baseT_Full, 146 }, 147 { 148 .speed = SPEED_1000, 149 .duplex = DUPLEX_HALF, 150 .setting = SUPPORTED_1000baseT_Half, 151 }, 152 { 153 .speed = SPEED_100, 154 .duplex = DUPLEX_FULL, 155 .setting = SUPPORTED_100baseT_Full, 156 }, 157 { 158 .speed = SPEED_100, 159 .duplex = DUPLEX_HALF, 160 .setting = SUPPORTED_100baseT_Half, 161 }, 162 { 163 .speed = SPEED_10, 164 .duplex = DUPLEX_FULL, 165 .setting = SUPPORTED_10baseT_Full, 166 }, 167 { 168 .speed = SPEED_10, 169 .duplex = DUPLEX_HALF, 170 .setting = SUPPORTED_10baseT_Half, 171 }, 172 }; 173 174 #define MAX_NUM_SETTINGS (sizeof(settings)/sizeof(struct phy_setting)) 175 176 /* phy_find_setting 177 * 178 * description: Searches the settings array for the setting which 179 * matches the desired speed and duplex, and returns the index 180 * of that setting. Returns the index of the last setting if 181 * none of the others match. 182 */ 183 static inline int phy_find_setting(int speed, int duplex) 184 { 185 int idx = 0; 186 187 while (idx < ARRAY_SIZE(settings) && 188 (settings[idx].speed != speed || 189 settings[idx].duplex != duplex)) 190 idx++; 191 192 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1; 193 } 194 195 /* phy_find_valid 196 * idx: The first index in settings[] to search 197 * features: A mask of the valid settings 198 * 199 * description: Returns the index of the first valid setting less 200 * than or equal to the one pointed to by idx, as determined by 201 * the mask in features. Returns the index of the last setting 202 * if nothing else matches. 203 */ 204 static inline int phy_find_valid(int idx, u32 features) 205 { 206 while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features)) 207 idx++; 208 209 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1; 210 } 211 212 /* phy_sanitize_settings 213 * 214 * description: Make sure the PHY is set to supported speeds and 215 * duplexes. Drop down by one in this order: 1000/FULL, 216 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF 217 */ 218 void phy_sanitize_settings(struct phy_device *phydev) 219 { 220 u32 features = phydev->supported; 221 int idx; 222 223 /* Sanitize settings based on PHY capabilities */ 224 if ((features & SUPPORTED_Autoneg) == 0) 225 phydev->autoneg = 0; 226 227 idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex), 228 features); 229 230 phydev->speed = settings[idx].speed; 231 phydev->duplex = settings[idx].duplex; 232 } 233 EXPORT_SYMBOL(phy_sanitize_settings); 234 235 /* phy_ethtool_sset: 236 * A generic ethtool sset function. Handles all the details 237 * 238 * A few notes about parameter checking: 239 * - We don't set port or transceiver, so we don't care what they 240 * were set to. 241 * - phy_start_aneg() will make sure forced settings are sane, and 242 * choose the next best ones from the ones selected, so we don't 243 * care if ethtool tries to give us bad values 244 * 245 */ 246 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd) 247 { 248 if (cmd->phy_address != phydev->addr) 249 return -EINVAL; 250 251 /* We make sure that we don't pass unsupported 252 * values in to the PHY */ 253 cmd->advertising &= phydev->supported; 254 255 /* Verify the settings we care about. */ 256 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE) 257 return -EINVAL; 258 259 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0) 260 return -EINVAL; 261 262 if (cmd->autoneg == AUTONEG_DISABLE 263 && ((cmd->speed != SPEED_1000 264 && cmd->speed != SPEED_100 265 && cmd->speed != SPEED_10) 266 || (cmd->duplex != DUPLEX_HALF 267 && cmd->duplex != DUPLEX_FULL))) 268 return -EINVAL; 269 270 phydev->autoneg = cmd->autoneg; 271 272 phydev->speed = cmd->speed; 273 274 phydev->advertising = cmd->advertising; 275 276 if (AUTONEG_ENABLE == cmd->autoneg) 277 phydev->advertising |= ADVERTISED_Autoneg; 278 else 279 phydev->advertising &= ~ADVERTISED_Autoneg; 280 281 phydev->duplex = cmd->duplex; 282 283 /* Restart the PHY */ 284 phy_start_aneg(phydev); 285 286 return 0; 287 } 288 289 int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd) 290 { 291 cmd->supported = phydev->supported; 292 293 cmd->advertising = phydev->advertising; 294 295 cmd->speed = phydev->speed; 296 cmd->duplex = phydev->duplex; 297 cmd->port = PORT_MII; 298 cmd->phy_address = phydev->addr; 299 cmd->transceiver = XCVR_EXTERNAL; 300 cmd->autoneg = phydev->autoneg; 301 302 return 0; 303 } 304 305 306 /* Note that this function is currently incompatible with the 307 * PHYCONTROL layer. It changes registers without regard to 308 * current state. Use at own risk 309 */ 310 int phy_mii_ioctl(struct phy_device *phydev, 311 struct mii_ioctl_data *mii_data, int cmd) 312 { 313 u16 val = mii_data->val_in; 314 315 switch (cmd) { 316 case SIOCGMIIPHY: 317 mii_data->phy_id = phydev->addr; 318 break; 319 case SIOCGMIIREG: 320 mii_data->val_out = phy_read(phydev, mii_data->reg_num); 321 break; 322 323 case SIOCSMIIREG: 324 if (!capable(CAP_NET_ADMIN)) 325 return -EPERM; 326 327 if (mii_data->phy_id == phydev->addr) { 328 switch(mii_data->reg_num) { 329 case MII_BMCR: 330 if (val & (BMCR_RESET|BMCR_ANENABLE)) 331 phydev->autoneg = AUTONEG_DISABLE; 332 else 333 phydev->autoneg = AUTONEG_ENABLE; 334 if ((!phydev->autoneg) && (val & BMCR_FULLDPLX)) 335 phydev->duplex = DUPLEX_FULL; 336 else 337 phydev->duplex = DUPLEX_HALF; 338 break; 339 case MII_ADVERTISE: 340 phydev->advertising = val; 341 break; 342 default: 343 /* do nothing */ 344 break; 345 } 346 } 347 348 phy_write(phydev, mii_data->reg_num, val); 349 350 if (mii_data->reg_num == MII_BMCR 351 && val & BMCR_RESET 352 && phydev->drv->config_init) 353 phydev->drv->config_init(phydev); 354 break; 355 } 356 357 return 0; 358 } 359 360 /* phy_start_aneg 361 * 362 * description: Sanitizes the settings (if we're not 363 * autonegotiating them), and then calls the driver's 364 * config_aneg function. If the PHYCONTROL Layer is operating, 365 * we change the state to reflect the beginning of 366 * Auto-negotiation or forcing. 367 */ 368 int phy_start_aneg(struct phy_device *phydev) 369 { 370 int err; 371 372 spin_lock(&phydev->lock); 373 374 if (AUTONEG_DISABLE == phydev->autoneg) 375 phy_sanitize_settings(phydev); 376 377 err = phydev->drv->config_aneg(phydev); 378 379 if (err < 0) 380 goto out_unlock; 381 382 if (phydev->state != PHY_HALTED) { 383 if (AUTONEG_ENABLE == phydev->autoneg) { 384 phydev->state = PHY_AN; 385 phydev->link_timeout = PHY_AN_TIMEOUT; 386 } else { 387 phydev->state = PHY_FORCING; 388 phydev->link_timeout = PHY_FORCE_TIMEOUT; 389 } 390 } 391 392 out_unlock: 393 spin_unlock(&phydev->lock); 394 return err; 395 } 396 EXPORT_SYMBOL(phy_start_aneg); 397 398 399 static void phy_change(void *data); 400 static void phy_timer(unsigned long data); 401 402 /* phy_start_machine: 403 * 404 * description: The PHY infrastructure can run a state machine 405 * which tracks whether the PHY is starting up, negotiating, 406 * etc. This function starts the timer which tracks the state 407 * of the PHY. If you want to be notified when the state 408 * changes, pass in the callback, otherwise, pass NULL. If you 409 * want to maintain your own state machine, do not call this 410 * function. */ 411 void phy_start_machine(struct phy_device *phydev, 412 void (*handler)(struct net_device *)) 413 { 414 phydev->adjust_state = handler; 415 416 init_timer(&phydev->phy_timer); 417 phydev->phy_timer.function = &phy_timer; 418 phydev->phy_timer.data = (unsigned long) phydev; 419 mod_timer(&phydev->phy_timer, jiffies + HZ); 420 } 421 422 /* phy_stop_machine 423 * 424 * description: Stops the state machine timer, sets the state to 425 * UP (unless it wasn't up yet), and then frees the interrupt, 426 * if it is in use. This function must be called BEFORE 427 * phy_detach. 428 */ 429 void phy_stop_machine(struct phy_device *phydev) 430 { 431 del_timer_sync(&phydev->phy_timer); 432 433 spin_lock(&phydev->lock); 434 if (phydev->state > PHY_UP) 435 phydev->state = PHY_UP; 436 spin_unlock(&phydev->lock); 437 438 if (phydev->irq != PHY_POLL) 439 phy_stop_interrupts(phydev); 440 441 phydev->adjust_state = NULL; 442 } 443 444 /* phy_force_reduction 445 * 446 * description: Reduces the speed/duplex settings by 447 * one notch. The order is so: 448 * 1000/FULL, 1000/HALF, 100/FULL, 100/HALF, 449 * 10/FULL, 10/HALF. The function bottoms out at 10/HALF. 450 */ 451 static void phy_force_reduction(struct phy_device *phydev) 452 { 453 int idx; 454 455 idx = phy_find_setting(phydev->speed, phydev->duplex); 456 457 idx++; 458 459 idx = phy_find_valid(idx, phydev->supported); 460 461 phydev->speed = settings[idx].speed; 462 phydev->duplex = settings[idx].duplex; 463 464 pr_info("Trying %d/%s\n", phydev->speed, 465 DUPLEX_FULL == phydev->duplex ? 466 "FULL" : "HALF"); 467 } 468 469 470 /* phy_error: 471 * 472 * Moves the PHY to the HALTED state in response to a read 473 * or write error, and tells the controller the link is down. 474 * Must not be called from interrupt context, or while the 475 * phydev->lock is held. 476 */ 477 void phy_error(struct phy_device *phydev) 478 { 479 spin_lock(&phydev->lock); 480 phydev->state = PHY_HALTED; 481 spin_unlock(&phydev->lock); 482 } 483 484 /* phy_interrupt 485 * 486 * description: When a PHY interrupt occurs, the handler disables 487 * interrupts, and schedules a work task to clear the interrupt. 488 */ 489 static irqreturn_t phy_interrupt(int irq, void *phy_dat, struct pt_regs *regs) 490 { 491 struct phy_device *phydev = phy_dat; 492 493 /* The MDIO bus is not allowed to be written in interrupt 494 * context, so we need to disable the irq here. A work 495 * queue will write the PHY to disable and clear the 496 * interrupt, and then reenable the irq line. */ 497 disable_irq_nosync(irq); 498 499 schedule_work(&phydev->phy_queue); 500 501 return IRQ_HANDLED; 502 } 503 504 /* Enable the interrupts from the PHY side */ 505 int phy_enable_interrupts(struct phy_device *phydev) 506 { 507 int err; 508 509 err = phy_clear_interrupt(phydev); 510 511 if (err < 0) 512 return err; 513 514 err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); 515 516 return err; 517 } 518 EXPORT_SYMBOL(phy_enable_interrupts); 519 520 /* Disable the PHY interrupts from the PHY side */ 521 int phy_disable_interrupts(struct phy_device *phydev) 522 { 523 int err; 524 525 /* Disable PHY interrupts */ 526 err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); 527 528 if (err) 529 goto phy_err; 530 531 /* Clear the interrupt */ 532 err = phy_clear_interrupt(phydev); 533 534 if (err) 535 goto phy_err; 536 537 return 0; 538 539 phy_err: 540 phy_error(phydev); 541 542 return err; 543 } 544 EXPORT_SYMBOL(phy_disable_interrupts); 545 546 /* phy_start_interrupts 547 * 548 * description: Request the interrupt for the given PHY. If 549 * this fails, then we set irq to PHY_POLL. 550 * Otherwise, we enable the interrupts in the PHY. 551 * Returns 0 on success. 552 * This should only be called with a valid IRQ number. 553 */ 554 int phy_start_interrupts(struct phy_device *phydev) 555 { 556 int err = 0; 557 558 INIT_WORK(&phydev->phy_queue, phy_change, phydev); 559 560 if (request_irq(phydev->irq, phy_interrupt, 561 SA_SHIRQ, 562 "phy_interrupt", 563 phydev) < 0) { 564 printk(KERN_WARNING "%s: Can't get IRQ %d (PHY)\n", 565 phydev->bus->name, 566 phydev->irq); 567 phydev->irq = PHY_POLL; 568 return 0; 569 } 570 571 err = phy_enable_interrupts(phydev); 572 573 return err; 574 } 575 EXPORT_SYMBOL(phy_start_interrupts); 576 577 int phy_stop_interrupts(struct phy_device *phydev) 578 { 579 int err; 580 581 err = phy_disable_interrupts(phydev); 582 583 if (err) 584 phy_error(phydev); 585 586 free_irq(phydev->irq, phydev); 587 588 return err; 589 } 590 EXPORT_SYMBOL(phy_stop_interrupts); 591 592 593 /* Scheduled by the phy_interrupt/timer to handle PHY changes */ 594 static void phy_change(void *data) 595 { 596 int err; 597 struct phy_device *phydev = data; 598 599 err = phy_disable_interrupts(phydev); 600 601 if (err) 602 goto phy_err; 603 604 spin_lock(&phydev->lock); 605 if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state)) 606 phydev->state = PHY_CHANGELINK; 607 spin_unlock(&phydev->lock); 608 609 enable_irq(phydev->irq); 610 611 /* Reenable interrupts */ 612 err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); 613 614 if (err) 615 goto irq_enable_err; 616 617 return; 618 619 irq_enable_err: 620 disable_irq(phydev->irq); 621 phy_err: 622 phy_error(phydev); 623 } 624 625 /* Bring down the PHY link, and stop checking the status. */ 626 void phy_stop(struct phy_device *phydev) 627 { 628 spin_lock(&phydev->lock); 629 630 if (PHY_HALTED == phydev->state) 631 goto out_unlock; 632 633 if (phydev->irq != PHY_POLL) { 634 /* Clear any pending interrupts */ 635 phy_clear_interrupt(phydev); 636 637 /* Disable PHY Interrupts */ 638 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); 639 } 640 641 phydev->state = PHY_HALTED; 642 643 out_unlock: 644 spin_unlock(&phydev->lock); 645 } 646 647 648 /* phy_start 649 * 650 * description: Indicates the attached device's readiness to 651 * handle PHY-related work. Used during startup to start the 652 * PHY, and after a call to phy_stop() to resume operation. 653 * Also used to indicate the MDIO bus has cleared an error 654 * condition. 655 */ 656 void phy_start(struct phy_device *phydev) 657 { 658 spin_lock(&phydev->lock); 659 660 switch (phydev->state) { 661 case PHY_STARTING: 662 phydev->state = PHY_PENDING; 663 break; 664 case PHY_READY: 665 phydev->state = PHY_UP; 666 break; 667 case PHY_HALTED: 668 phydev->state = PHY_RESUMING; 669 default: 670 break; 671 } 672 spin_unlock(&phydev->lock); 673 } 674 EXPORT_SYMBOL(phy_stop); 675 EXPORT_SYMBOL(phy_start); 676 677 /* PHY timer which handles the state machine */ 678 static void phy_timer(unsigned long data) 679 { 680 struct phy_device *phydev = (struct phy_device *)data; 681 int needs_aneg = 0; 682 int err = 0; 683 684 spin_lock(&phydev->lock); 685 686 if (phydev->adjust_state) 687 phydev->adjust_state(phydev->attached_dev); 688 689 switch(phydev->state) { 690 case PHY_DOWN: 691 case PHY_STARTING: 692 case PHY_READY: 693 case PHY_PENDING: 694 break; 695 case PHY_UP: 696 needs_aneg = 1; 697 698 phydev->link_timeout = PHY_AN_TIMEOUT; 699 700 break; 701 case PHY_AN: 702 /* Check if negotiation is done. Break 703 * if there's an error */ 704 err = phy_aneg_done(phydev); 705 if (err < 0) 706 break; 707 708 /* If auto-negotiation is done, we change to 709 * either RUNNING, or NOLINK */ 710 if (err > 0) { 711 err = phy_read_status(phydev); 712 713 if (err) 714 break; 715 716 if (phydev->link) { 717 phydev->state = PHY_RUNNING; 718 netif_carrier_on(phydev->attached_dev); 719 } else { 720 phydev->state = PHY_NOLINK; 721 netif_carrier_off(phydev->attached_dev); 722 } 723 724 phydev->adjust_link(phydev->attached_dev); 725 726 } else if (0 == phydev->link_timeout--) { 727 /* The counter expired, so either we 728 * switch to forced mode, or the 729 * magic_aneg bit exists, and we try aneg 730 * again */ 731 if (!(phydev->drv->flags & PHY_HAS_MAGICANEG)) { 732 int idx; 733 734 /* We'll start from the 735 * fastest speed, and work 736 * our way down */ 737 idx = phy_find_valid(0, 738 phydev->supported); 739 740 phydev->speed = settings[idx].speed; 741 phydev->duplex = settings[idx].duplex; 742 743 phydev->autoneg = AUTONEG_DISABLE; 744 phydev->state = PHY_FORCING; 745 phydev->link_timeout = 746 PHY_FORCE_TIMEOUT; 747 748 pr_info("Trying %d/%s\n", 749 phydev->speed, 750 DUPLEX_FULL == 751 phydev->duplex ? 752 "FULL" : "HALF"); 753 } 754 755 needs_aneg = 1; 756 } 757 break; 758 case PHY_NOLINK: 759 err = phy_read_status(phydev); 760 761 if (err) 762 break; 763 764 if (phydev->link) { 765 phydev->state = PHY_RUNNING; 766 netif_carrier_on(phydev->attached_dev); 767 phydev->adjust_link(phydev->attached_dev); 768 } 769 break; 770 case PHY_FORCING: 771 err = phy_read_status(phydev); 772 773 if (err) 774 break; 775 776 if (phydev->link) { 777 phydev->state = PHY_RUNNING; 778 netif_carrier_on(phydev->attached_dev); 779 } else { 780 if (0 == phydev->link_timeout--) { 781 phy_force_reduction(phydev); 782 needs_aneg = 1; 783 } 784 } 785 786 phydev->adjust_link(phydev->attached_dev); 787 break; 788 case PHY_RUNNING: 789 /* Only register a CHANGE if we are 790 * polling */ 791 if (PHY_POLL == phydev->irq) 792 phydev->state = PHY_CHANGELINK; 793 break; 794 case PHY_CHANGELINK: 795 err = phy_read_status(phydev); 796 797 if (err) 798 break; 799 800 if (phydev->link) { 801 phydev->state = PHY_RUNNING; 802 netif_carrier_on(phydev->attached_dev); 803 } else { 804 phydev->state = PHY_NOLINK; 805 netif_carrier_off(phydev->attached_dev); 806 } 807 808 phydev->adjust_link(phydev->attached_dev); 809 810 if (PHY_POLL != phydev->irq) 811 err = phy_config_interrupt(phydev, 812 PHY_INTERRUPT_ENABLED); 813 break; 814 case PHY_HALTED: 815 if (phydev->link) { 816 phydev->link = 0; 817 netif_carrier_off(phydev->attached_dev); 818 phydev->adjust_link(phydev->attached_dev); 819 } 820 break; 821 case PHY_RESUMING: 822 823 err = phy_clear_interrupt(phydev); 824 825 if (err) 826 break; 827 828 err = phy_config_interrupt(phydev, 829 PHY_INTERRUPT_ENABLED); 830 831 if (err) 832 break; 833 834 if (AUTONEG_ENABLE == phydev->autoneg) { 835 err = phy_aneg_done(phydev); 836 if (err < 0) 837 break; 838 839 /* err > 0 if AN is done. 840 * Otherwise, it's 0, and we're 841 * still waiting for AN */ 842 if (err > 0) { 843 phydev->state = PHY_RUNNING; 844 } else { 845 phydev->state = PHY_AN; 846 phydev->link_timeout = PHY_AN_TIMEOUT; 847 } 848 } else 849 phydev->state = PHY_RUNNING; 850 break; 851 } 852 853 spin_unlock(&phydev->lock); 854 855 if (needs_aneg) 856 err = phy_start_aneg(phydev); 857 858 if (err < 0) 859 phy_error(phydev); 860 861 mod_timer(&phydev->phy_timer, jiffies + PHY_STATE_TIME * HZ); 862 } 863 864