drivers/net/phy/phy.c

   1 /* Framework for configuring and reading PHY devices
   2  * Based on code in sungem_phy.c and gianfar_phy.c
   3  *
   4  * Author: Andy Fleming
   5  *
   6  * Copyright (c) 2004 Freescale Semiconductor, Inc.
   7  * Copyright (c) 2006, 2007  Maciej W. Rozycki
   8  *
   9  * This program is free software; you can redistribute  it and/or modify it
  10  * under  the terms of  the GNU General  Public License as published by the
  11  * Free Software Foundation;  either version 2 of the  License, or (at your
  12  * option) any later version.
  13  *
  14  */
  15
  16 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  17
  18 #include <linux/kernel.h>
  19 #include <linux/string.h>
  20 #include <linux/errno.h>
  21 #include <linux/unistd.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/delay.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/skbuff.h>
  27 #include <linux/mm.h>
  28 #include <linux/module.h>
  29 #include <linux/mii.h>
  30 #include <linux/ethtool.h>
  31 #include <linux/phy.h>
  32 #include <linux/phy_led_triggers.h>
  33 #include <linux/workqueue.h>
  34 #include <linux/mdio.h>
  35 #include <linux/io.h>
  36 #include <linux/uaccess.h>
  37 #include <linux/atomic.h>
  38
  39 #include <asm/irq.h>
  40
  41 #define PHY_STATE_STR(_state)                   \
  42         case PHY_##_state:                      \
  43                 return __stringify(_state);     \
  44
  45 static const char *phy_state_to_str(enum phy_state st)
  46 {
  47         switch (st) {
  48         PHY_STATE_STR(DOWN)
  49         PHY_STATE_STR(STARTING)
  50         PHY_STATE_STR(READY)
  51         PHY_STATE_STR(PENDING)
  52         PHY_STATE_STR(UP)
  53         PHY_STATE_STR(AN)
  54         PHY_STATE_STR(RUNNING)
  55         PHY_STATE_STR(NOLINK)
  56         PHY_STATE_STR(FORCING)
  57         PHY_STATE_STR(CHANGELINK)
  58         PHY_STATE_STR(HALTED)
  59         PHY_STATE_STR(RESUMING)
  60         }
  61
  62         return NULL;
  63 }
  64
  65
  66 /**
  67  * phy_print_status - Convenience function to print out the current phy status
  68  * @phydev: the phy_device struct
  69  */
  70 void phy_print_status(struct phy_device *phydev)
  71 {
  72         if (phydev->link) {
  73                 netdev_info(phydev->attached_dev,
  74                         "Link is Up - %s/%s - flow control %s\n",
  75                         phy_speed_to_str(phydev->speed),
  76                         phy_duplex_to_str(phydev->duplex),
  77                         phydev->pause ? "rx/tx" : "off");
  78         } else  {
  79                 netdev_info(phydev->attached_dev, "Link is Down\n");
  80         }
  81 }
  82 EXPORT_SYMBOL(phy_print_status);
  83
  84 /**
  85  * phy_clear_interrupt - Ack the phy device's interrupt
  86  * @phydev: the phy_device struct
  87  *
  88  * If the @phydev driver has an ack_interrupt function, call it to
  89  * ack and clear the phy device's interrupt.
  90  *
  91  * Returns 0 on success or < 0 on error.
  92  */
  93 static int phy_clear_interrupt(struct phy_device *phydev)
  94 {
  95         if (phydev->drv->ack_interrupt)
  96                 return phydev->drv->ack_interrupt(phydev);
  97
  98         return 0;
  99 }
 100
 101 /**
 102  * phy_config_interrupt - configure the PHY device for the requested interrupts
 103  * @phydev: the phy_device struct
 104  * @interrupts: interrupt flags to configure for this @phydev
 105  *
 106  * Returns 0 on success or < 0 on error.
 107  */
 108 static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
 109 {
 110         phydev->interrupts = interrupts;
 111         if (phydev->drv->config_intr)
 112                 return phydev->drv->config_intr(phydev);
 113
 114         return 0;
 115 }
 116
 117 /**
 118  * phy_restart_aneg - restart auto-negotiation
 119  * @phydev: target phy_device struct
 120  *
 121  * Restart the autonegotiation on @phydev.  Returns >= 0 on success or
 122  * negative errno on error.
 123  */
 124 int phy_restart_aneg(struct phy_device *phydev)
 125 {
 126         int ret;
 127
 128         if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
 129                 ret = genphy_c45_restart_aneg(phydev);
 130         else
 131                 ret = genphy_restart_aneg(phydev);
 132
 133         return ret;
 134 }
 135 EXPORT_SYMBOL_GPL(phy_restart_aneg);
 136
 137 /**
 138  * phy_aneg_done - return auto-negotiation status
 139  * @phydev: target phy_device struct
 140  *
 141  * Description: Return the auto-negotiation status from this @phydev
 142  * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
 143  * is still pending.
 144  */
 145 int phy_aneg_done(struct phy_device *phydev)
 146 {
 147         if (phydev->drv && phydev->drv->aneg_done)
 148                 return phydev->drv->aneg_done(phydev);
 149
 150         /* Avoid genphy_aneg_done() if the Clause 45 PHY does not
 151          * implement Clause 22 registers
 152          */
 153         if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
 154                 return -EINVAL;
 155
 156         return genphy_aneg_done(phydev);
 157 }
 158 EXPORT_SYMBOL(phy_aneg_done);
 159
 160 /* A structure for mapping a particular speed and duplex
 161  * combination to a particular SUPPORTED and ADVERTISED value
 162  */
 163 struct phy_setting {
 164         int speed;
 165         int duplex;
 166         int bit;
 167 };
 168
 169 /* A mapping of all SUPPORTED settings to speed/duplex.  This table
 170  * must be grouped by speed and sorted in descending match priority
 171  * - iow, descending speed. */
 172 static const struct phy_setting settings[] = {
 173         {
 174                 .speed = SPEED_10000,
 175                 .duplex = DUPLEX_FULL,
 176                 .bit = ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
 177         },
 178         {
 179                 .speed = SPEED_10000,
 180                 .duplex = DUPLEX_FULL,
 181                 .bit = ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
 182         },
 183         {
 184                 .speed = SPEED_10000,
 185                 .duplex = DUPLEX_FULL,
 186                 .bit = ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
 187         },
 188         {
 189                 .speed = SPEED_2500,
 190                 .duplex = DUPLEX_FULL,
 191                 .bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
 192         },
 193         {
 194                 .speed = SPEED_1000,
 195                 .duplex = DUPLEX_FULL,
 196                 .bit = ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
 197         },
 198         {
 199                 .speed = SPEED_1000,
 200                 .duplex = DUPLEX_FULL,
 201                 .bit = ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
 202         },
 203         {
 204                 .speed = SPEED_1000,
 205                 .duplex = DUPLEX_HALF,
 206                 .bit = ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
 207         },
 208         {
 209                 .speed = SPEED_100,
 210                 .duplex = DUPLEX_FULL,
 211                 .bit = ETHTOOL_LINK_MODE_100baseT_Full_BIT,
 212         },
 213         {
 214                 .speed = SPEED_100,
 215                 .duplex = DUPLEX_HALF,
 216                 .bit = ETHTOOL_LINK_MODE_100baseT_Half_BIT,
 217         },
 218         {
 219                 .speed = SPEED_10,
 220                 .duplex = DUPLEX_FULL,
 221                 .bit = ETHTOOL_LINK_MODE_10baseT_Full_BIT,
 222         },
 223         {
 224                 .speed = SPEED_10,
 225                 .duplex = DUPLEX_HALF,
 226                 .bit = ETHTOOL_LINK_MODE_10baseT_Half_BIT,
 227         },
 228 };
 229
 230 /**
 231  * phy_lookup_setting - lookup a PHY setting
 232  * @speed: speed to match
 233  * @duplex: duplex to match
 234  * @mask: allowed link modes
 235  * @maxbit: bit size of link modes
 236  * @exact: an exact match is required
 237  *
 238  * Search the settings array for a setting that matches the speed and
 239  * duplex, and which is supported.
 240  *
 241  * If @exact is unset, either an exact match or %NULL for no match will
 242  * be returned.
 243  *
 244  * If @exact is set, an exact match, the fastest supported setting at
 245  * or below the specified speed, the slowest supported setting, or if
 246  * they all fail, %NULL will be returned.
 247  */
 248 static const struct phy_setting *
 249 phy_lookup_setting(int speed, int duplex, const unsigned long *mask,
 250                    size_t maxbit, bool exact)
 251 {
 252         const struct phy_setting *p, *match = NULL, *last = NULL;
 253         int i;
 254
 255         for (i = 0, p = settings; i < ARRAY_SIZE(settings); i++, p++) {
 256                 if (p->bit < maxbit && test_bit(p->bit, mask)) {
 257                         last = p;
 258                         if (p->speed == speed && p->duplex == duplex) {
 259                                 /* Exact match for speed and duplex */
 260                                 match = p;
 261                                 break;
 262                         } else if (!exact) {
 263                                 if (!match && p->speed <= speed)
 264                                         /* Candidate */
 265                                         match = p;
 266
 267                                 if (p->speed < speed)
 268                                         break;
 269                         }
 270                 }
 271         }
 272
 273         if (!match && !exact)
 274                 match = last;
 275
 276         return match;
 277 }
 278
 279 /**
 280  * phy_find_valid - find a PHY setting that matches the requested parameters
 281  * @speed: desired speed
 282  * @duplex: desired duplex
 283  * @supported: mask of supported link modes
 284  *
 285  * Locate a supported phy setting that is, in priority order:
 286  * - an exact match for the specified speed and duplex mode
 287  * - a match for the specified speed, or slower speed
 288  * - the slowest supported speed
 289  * Returns the matched phy_setting entry, or %NULL if no supported phy
 290  * settings were found.
 291  */
 292 static const struct phy_setting *
 293 phy_find_valid(int speed, int duplex, u32 supported)
 294 {
 295         unsigned long mask = supported;
 296
 297         return phy_lookup_setting(speed, duplex, &mask, BITS_PER_LONG, false);
 298 }
 299
 300 /**
 301  * phy_supported_speeds - return all speeds currently supported by a phy device
 302  * @phy: The phy device to return supported speeds of.
 303  * @speeds: buffer to store supported speeds in.
 304  * @size:   size of speeds buffer.
 305  *
 306  * Description: Returns the number of supported speeds, and fills the speeds
 307  * buffer with the supported speeds. If speeds buffer is too small to contain
 308  * all currently supported speeds, will return as many speeds as can fit.
 309  */
 310 unsigned int phy_supported_speeds(struct phy_device *phy,
 311                                   unsigned int *speeds,
 312                                   unsigned int size)
 313 {
 314         unsigned long supported = phy->supported;
 315         unsigned int count = 0;
 316         unsigned int idx = 0;
 317
 318         for (idx = 0; idx < ARRAY_SIZE(settings) && count < size; idx++)
 319                 /* Assumes settings are grouped by speed */
 320                 if (settings[idx].bit < BITS_PER_LONG &&
 321                     !test_bit(settings[idx].bit, &supported) &&
 322                     (count == 0 || speeds[count - 1] != settings[idx].speed))
 323                         speeds[count++] = settings[idx].speed;
 324
 325         return count;
 326 }
 327
 328 /**
 329  * phy_check_valid - check if there is a valid PHY setting which matches
 330  *                   speed, duplex, and feature mask
 331  * @speed: speed to match
 332  * @duplex: duplex to match
 333  * @features: A mask of the valid settings
 334  *
 335  * Description: Returns true if there is a valid setting, false otherwise.
 336  */
 337 static inline bool phy_check_valid(int speed, int duplex, u32 features)
 338 {
 339         unsigned long mask = features;
 340
 341         return !!phy_lookup_setting(speed, duplex, &mask, BITS_PER_LONG, true);
 342 }
 343
 344 /**
 345  * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
 346  * @phydev: the target phy_device struct
 347  *
 348  * Description: Make sure the PHY is set to supported speeds and
 349  *   duplexes.  Drop down by one in this order:  1000/FULL,
 350  *   1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
 351  */
 352 static void phy_sanitize_settings(struct phy_device *phydev)
 353 {
 354         const struct phy_setting *setting;
 355         u32 features = phydev->supported;
 356
 357         /* Sanitize settings based on PHY capabilities */
 358         if ((features & SUPPORTED_Autoneg) == 0)
 359                 phydev->autoneg = AUTONEG_DISABLE;
 360
 361         setting = phy_find_valid(phydev->speed, phydev->duplex, features);
 362         if (setting) {
 363                 phydev->speed = setting->speed;
 364                 phydev->duplex = setting->duplex;
 365         } else {
 366                 /* We failed to find anything (no supported speeds?) */
 367                 phydev->speed = SPEED_UNKNOWN;
 368                 phydev->duplex = DUPLEX_UNKNOWN;
 369         }
 370 }
 371
 372 /**
 373  * phy_ethtool_sset - generic ethtool sset function, handles all the details
 374  * @phydev: target phy_device struct
 375  * @cmd: ethtool_cmd
 376  *
 377  * A few notes about parameter checking:
 378  *
 379  * - We don't set port or transceiver, so we don't care what they
 380  *   were set to.
 381  * - phy_start_aneg() will make sure forced settings are sane, and
 382  *   choose the next best ones from the ones selected, so we don't
 383  *   care if ethtool tries to give us bad values.
 384  */
 385 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
 386 {
 387         u32 speed = ethtool_cmd_speed(cmd);
 388
 389         if (cmd->phy_address != phydev->mdio.addr)
 390                 return -EINVAL;
 391
 392         /* We make sure that we don't pass unsupported values in to the PHY */
 393         cmd->advertising &= phydev->supported;
 394
 395         /* Verify the settings we care about. */
 396         if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
 397                 return -EINVAL;
 398
 399         if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
 400                 return -EINVAL;
 401
 402         if (cmd->autoneg == AUTONEG_DISABLE &&
 403             ((speed != SPEED_1000 &&
 404               speed != SPEED_100 &&
 405               speed != SPEED_10) ||
 406              (cmd->duplex != DUPLEX_HALF &&
 407               cmd->duplex != DUPLEX_FULL)))
 408                 return -EINVAL;
 409
 410         phydev->autoneg = cmd->autoneg;
 411
 412         phydev->speed = speed;
 413
 414         phydev->advertising = cmd->advertising;
 415
 416         if (AUTONEG_ENABLE == cmd->autoneg)
 417                 phydev->advertising |= ADVERTISED_Autoneg;
 418         else
 419                 phydev->advertising &= ~ADVERTISED_Autoneg;
 420
 421         phydev->duplex = cmd->duplex;
 422
 423         phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl;
 424
 425         /* Restart the PHY */
 426         phy_start_aneg(phydev);
 427
 428         return 0;
 429 }
 430 EXPORT_SYMBOL(phy_ethtool_sset);
 431
 432 int phy_ethtool_ksettings_set(struct phy_device *phydev,
 433                               const struct ethtool_link_ksettings *cmd)
 434 {
 435         u8 autoneg = cmd->base.autoneg;
 436         u8 duplex = cmd->base.duplex;
 437         u32 speed = cmd->base.speed;
 438         u32 advertising;
 439
 440         if (cmd->base.phy_address != phydev->mdio.addr)
 441                 return -EINVAL;
 442
 443         ethtool_convert_link_mode_to_legacy_u32(&advertising,
 444                                                 cmd->link_modes.advertising);
 445
 446         /* We make sure that we don't pass unsupported values in to the PHY */
 447         advertising &= phydev->supported;
 448
 449         /* Verify the settings we care about. */
 450         if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
 451                 return -EINVAL;
 452
 453         if (autoneg == AUTONEG_ENABLE && advertising == 0)
 454                 return -EINVAL;
 455
 456         if (autoneg == AUTONEG_DISABLE &&
 457             ((speed != SPEED_1000 &&
 458               speed != SPEED_100 &&
 459               speed != SPEED_10) ||
 460              (duplex != DUPLEX_HALF &&
 461               duplex != DUPLEX_FULL)))
 462                 return -EINVAL;
 463
 464         phydev->autoneg = autoneg;
 465
 466         phydev->speed = speed;
 467
 468         phydev->advertising = advertising;
 469
 470         if (autoneg == AUTONEG_ENABLE)
 471                 phydev->advertising |= ADVERTISED_Autoneg;
 472         else
 473                 phydev->advertising &= ~ADVERTISED_Autoneg;
 474
 475         phydev->duplex = duplex;
 476
 477         phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
 478
 479         /* Restart the PHY */
 480         phy_start_aneg(phydev);
 481
 482         return 0;
 483 }
 484 EXPORT_SYMBOL(phy_ethtool_ksettings_set);
 485
 486 void phy_ethtool_ksettings_get(struct phy_device *phydev,
 487                                struct ethtool_link_ksettings *cmd)
 488 {
 489         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
 490                                                 phydev->supported);
 491
 492         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
 493                                                 phydev->advertising);
 494
 495         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
 496                                                 phydev->lp_advertising);
 497
 498         cmd->base.speed = phydev->speed;
 499         cmd->base.duplex = phydev->duplex;
 500         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 501                 cmd->base.port = PORT_BNC;
 502         else
 503                 cmd->base.port = PORT_MII;
 504
 505         cmd->base.phy_address = phydev->mdio.addr;
 506         cmd->base.autoneg = phydev->autoneg;
 507         cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
 508         cmd->base.eth_tp_mdix = phydev->mdix;
 509 }
 510 EXPORT_SYMBOL(phy_ethtool_ksettings_get);
 511
 512 /**
 513  * phy_mii_ioctl - generic PHY MII ioctl interface
 514  * @phydev: the phy_device struct
 515  * @ifr: &struct ifreq for socket ioctl's
 516  * @cmd: ioctl cmd to execute
 517  *
 518  * Note that this function is currently incompatible with the
 519  * PHYCONTROL layer.  It changes registers without regard to
 520  * current state.  Use at own risk.
 521  */
 522 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
 523 {
 524         struct mii_ioctl_data *mii_data = if_mii(ifr);
 525         u16 val = mii_data->val_in;
 526         bool change_autoneg = false;
 527
 528         switch (cmd) {
 529         case SIOCGMIIPHY:
 530                 mii_data->phy_id = phydev->mdio.addr;
 531                 /* fall through */
 532
 533         case SIOCGMIIREG:
 534                 mii_data->val_out = mdiobus_read(phydev->mdio.bus,
 535                                                  mii_data->phy_id,
 536                                                  mii_data->reg_num);
 537                 return 0;
 538
 539         case SIOCSMIIREG:
 540                 if (mii_data->phy_id == phydev->mdio.addr) {
 541                         switch (mii_data->reg_num) {
 542                         case MII_BMCR:
 543                                 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
 544                                         if (phydev->autoneg == AUTONEG_ENABLE)
 545                                                 change_autoneg = true;
 546                                         phydev->autoneg = AUTONEG_DISABLE;
 547                                         if (val & BMCR_FULLDPLX)
 548                                                 phydev->duplex = DUPLEX_FULL;
 549                                         else
 550                                                 phydev->duplex = DUPLEX_HALF;
 551                                         if (val & BMCR_SPEED1000)
 552                                                 phydev->speed = SPEED_1000;
 553                                         else if (val & BMCR_SPEED100)
 554                                                 phydev->speed = SPEED_100;
 555                                         else phydev->speed = SPEED_10;
 556                                 }
 557                                 else {
 558                                         if (phydev->autoneg == AUTONEG_DISABLE)
 559                                                 change_autoneg = true;
 560                                         phydev->autoneg = AUTONEG_ENABLE;
 561                                 }
 562                                 break;
 563                         case MII_ADVERTISE:
 564                                 phydev->advertising = mii_adv_to_ethtool_adv_t(val);
 565                                 change_autoneg = true;
 566                                 break;
 567                         default:
 568                                 /* do nothing */
 569                                 break;
 570                         }
 571                 }
 572
 573                 mdiobus_write(phydev->mdio.bus, mii_data->phy_id,
 574                               mii_data->reg_num, val);
 575
 576                 if (mii_data->phy_id == phydev->mdio.addr &&
 577                     mii_data->reg_num == MII_BMCR &&
 578                     val & BMCR_RESET)
 579                         return phy_init_hw(phydev);
 580
 581                 if (change_autoneg)
 582                         return phy_start_aneg(phydev);
 583
 584                 return 0;
 585
 586         case SIOCSHWTSTAMP:
 587                 if (phydev->drv && phydev->drv->hwtstamp)
 588                         return phydev->drv->hwtstamp(phydev, ifr);
 589                 /* fall through */
 590
 591         default:
 592                 return -EOPNOTSUPP;
 593         }
 594 }
 595 EXPORT_SYMBOL(phy_mii_ioctl);
 596
 597 /**
 598  * phy_start_aneg_priv - start auto-negotiation for this PHY device
 599  * @phydev: the phy_device struct
 600  * @sync: indicate whether we should wait for the workqueue cancelation
 601  *
 602  * Description: Sanitizes the settings (if we're not autonegotiating
 603  *   them), and then calls the driver's config_aneg function.
 604  *   If the PHYCONTROL Layer is operating, we change the state to
 605  *   reflect the beginning of Auto-negotiation or forcing.
 606  */
 607 static int phy_start_aneg_priv(struct phy_device *phydev, bool sync)
 608 {
 609         bool trigger = 0;
 610         int err;
 611
 612         if (!phydev->drv)
 613                 return -EIO;
 614
 615         mutex_lock(&phydev->lock);
 616
 617         if (AUTONEG_DISABLE == phydev->autoneg)
 618                 phy_sanitize_settings(phydev);
 619
 620         /* Invalidate LP advertising flags */
 621         phydev->lp_advertising = 0;
 622
 623         err = phydev->drv->config_aneg(phydev);
 624         if (err < 0)
 625                 goto out_unlock;
 626
 627         if (phydev->state != PHY_HALTED) {
 628                 if (AUTONEG_ENABLE == phydev->autoneg) {
 629                         phydev->state = PHY_AN;
 630                         phydev->link_timeout = PHY_AN_TIMEOUT;
 631                 } else {
 632                         phydev->state = PHY_FORCING;
 633                         phydev->link_timeout = PHY_FORCE_TIMEOUT;
 634                 }
 635         }
 636
 637         /* Re-schedule a PHY state machine to check PHY status because
 638          * negotiation may already be done and aneg interrupt may not be
 639          * generated.
 640          */
 641         if (phy_interrupt_is_valid(phydev) && (phydev->state == PHY_AN)) {
 642                 err = phy_aneg_done(phydev);
 643                 if (err > 0) {
 644                         trigger = true;
 645                         err = 0;
 646                 }
 647         }
 648
 649 out_unlock:
 650         mutex_unlock(&phydev->lock);
 651
 652         if (trigger)
 653                 phy_trigger_machine(phydev, sync);
 654
 655         return err;
 656 }
 657
 658 /**
 659  * phy_start_aneg - start auto-negotiation for this PHY device
 660  * @phydev: the phy_device struct
 661  *
 662  * Description: Sanitizes the settings (if we're not autonegotiating
 663  *   them), and then calls the driver's config_aneg function.
 664  *   If the PHYCONTROL Layer is operating, we change the state to
 665  *   reflect the beginning of Auto-negotiation or forcing.
 666  */
 667 int phy_start_aneg(struct phy_device *phydev)
 668 {
 669         return phy_start_aneg_priv(phydev, true);
 670 }
 671 EXPORT_SYMBOL(phy_start_aneg);
 672
 673 /**
 674  * phy_start_machine - start PHY state machine tracking
 675  * @phydev: the phy_device struct
 676  *
 677  * Description: The PHY infrastructure can run a state machine
 678  *   which tracks whether the PHY is starting up, negotiating,
 679  *   etc.  This function starts the delayed workqueue which tracks
 680  *   the state of the PHY. If you want to maintain your own state machine,
 681  *   do not call this function.
 682  */
 683 void phy_start_machine(struct phy_device *phydev)
 684 {
 685         queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
 686 }
 687
 688 /**
 689  * phy_trigger_machine - trigger the state machine to run
 690  *
 691  * @phydev: the phy_device struct
 692  * @sync: indicate whether we should wait for the workqueue cancelation
 693  *
 694  * Description: There has been a change in state which requires that the
 695  *   state machine runs.
 696  */
 697
 698 void phy_trigger_machine(struct phy_device *phydev, bool sync)
 699 {
 700         if (sync)
 701                 cancel_delayed_work_sync(&phydev->state_queue);
 702         else
 703                 cancel_delayed_work(&phydev->state_queue);
 704         queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
 705 }
 706
 707 /**
 708  * phy_stop_machine - stop the PHY state machine tracking
 709  * @phydev: target phy_device struct
 710  *
 711  * Description: Stops the state machine delayed workqueue, sets the
 712  *   state to UP (unless it wasn't up yet). This function must be
 713  *   called BEFORE phy_detach.
 714  */
 715 void phy_stop_machine(struct phy_device *phydev)
 716 {
 717         cancel_delayed_work_sync(&phydev->state_queue);
 718
 719         mutex_lock(&phydev->lock);
 720         if (phydev->state > PHY_UP && phydev->state != PHY_HALTED)
 721                 phydev->state = PHY_UP;
 722         mutex_unlock(&phydev->lock);
 723
 724         /* Now we can run the state machine synchronously */
 725         phy_state_machine(&phydev->state_queue.work);
 726 }
 727
 728 /**
 729  * phy_error - enter HALTED state for this PHY device
 730  * @phydev: target phy_device struct
 731  *
 732  * Moves the PHY to the HALTED state in response to a read
 733  * or write error, and tells the controller the link is down.
 734  * Must not be called from interrupt context, or while the
 735  * phydev->lock is held.
 736  */
 737 static void phy_error(struct phy_device *phydev)
 738 {
 739         mutex_lock(&phydev->lock);
 740         phydev->state = PHY_HALTED;
 741         mutex_unlock(&phydev->lock);
 742
 743         phy_trigger_machine(phydev, false);
 744 }
 745
 746 /**
 747  * phy_interrupt - PHY interrupt handler
 748  * @irq: interrupt line
 749  * @phy_dat: phy_device pointer
 750  *
 751  * Description: When a PHY interrupt occurs, the handler disables
 752  * interrupts, and uses phy_change to handle the interrupt.
 753  */
 754 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
 755 {
 756         struct phy_device *phydev = phy_dat;
 757
 758         if (PHY_HALTED == phydev->state)
 759                 return IRQ_NONE;                /* It can't be ours.  */
 760
 761         disable_irq_nosync(irq);
 762         atomic_inc(&phydev->irq_disable);
 763
 764         phy_change(phydev);
 765
 766         return IRQ_HANDLED;
 767 }
 768
 769 /**
 770  * phy_enable_interrupts - Enable the interrupts from the PHY side
 771  * @phydev: target phy_device struct
 772  */
 773 static int phy_enable_interrupts(struct phy_device *phydev)
 774 {
 775         int err = phy_clear_interrupt(phydev);
 776
 777         if (err < 0)
 778                 return err;
 779
 780         return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
 781 }
 782
 783 /**
 784  * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
 785  * @phydev: target phy_device struct
 786  */
 787 static int phy_disable_interrupts(struct phy_device *phydev)
 788 {
 789         int err;
 790
 791         /* Disable PHY interrupts */
 792         err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 793         if (err)
 794                 goto phy_err;
 795
 796         /* Clear the interrupt */
 797         err = phy_clear_interrupt(phydev);
 798         if (err)
 799                 goto phy_err;
 800
 801         return 0;
 802
 803 phy_err:
 804         phy_error(phydev);
 805
 806         return err;
 807 }
 808
 809 /**
 810  * phy_start_interrupts - request and enable interrupts for a PHY device
 811  * @phydev: target phy_device struct
 812  *
 813  * Description: Request the interrupt for the given PHY.
 814  *   If this fails, then we set irq to PHY_POLL.
 815  *   Otherwise, we enable the interrupts in the PHY.
 816  *   This should only be called with a valid IRQ number.
 817  *   Returns 0 on success or < 0 on error.
 818  */
 819 int phy_start_interrupts(struct phy_device *phydev)
 820 {
 821         atomic_set(&phydev->irq_disable, 0);
 822         if (request_threaded_irq(phydev->irq, NULL, phy_interrupt,
 823                                  IRQF_ONESHOT | IRQF_SHARED,
 824                                  phydev_name(phydev), phydev) < 0) {
 825                 pr_warn("%s: Can't get IRQ %d (PHY)\n",
 826                         phydev->mdio.bus->name, phydev->irq);
 827                 phydev->irq = PHY_POLL;
 828                 return 0;
 829         }
 830
 831         return phy_enable_interrupts(phydev);
 832 }
 833 EXPORT_SYMBOL(phy_start_interrupts);
 834
 835 /**
 836  * phy_stop_interrupts - disable interrupts from a PHY device
 837  * @phydev: target phy_device struct
 838  */
 839 int phy_stop_interrupts(struct phy_device *phydev)
 840 {
 841         int err = phy_disable_interrupts(phydev);
 842
 843         if (err)
 844                 phy_error(phydev);
 845
 846         free_irq(phydev->irq, phydev);
 847
 848         /* If work indeed has been cancelled, disable_irq() will have
 849          * been left unbalanced from phy_interrupt() and enable_irq()
 850          * has to be called so that other devices on the line work.
 851          */
 852         while (atomic_dec_return(&phydev->irq_disable) >= 0)
 853                 enable_irq(phydev->irq);
 854
 855         return err;
 856 }
 857 EXPORT_SYMBOL(phy_stop_interrupts);
 858
 859 /**
 860  * phy_change - Called by the phy_interrupt to handle PHY changes
 861  * @phydev: phy_device struct that interrupted
 862  */
 863 void phy_change(struct phy_device *phydev)
 864 {
 865         if (phy_interrupt_is_valid(phydev)) {
 866                 if (phydev->drv->did_interrupt &&
 867                     !phydev->drv->did_interrupt(phydev))
 868                         goto ignore;
 869
 870                 if (phy_disable_interrupts(phydev))
 871                         goto phy_err;
 872         }
 873
 874         mutex_lock(&phydev->lock);
 875         if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
 876                 phydev->state = PHY_CHANGELINK;
 877         mutex_unlock(&phydev->lock);
 878
 879         if (phy_interrupt_is_valid(phydev)) {
 880                 atomic_dec(&phydev->irq_disable);
 881                 enable_irq(phydev->irq);
 882
 883                 /* Reenable interrupts */
 884                 if (PHY_HALTED != phydev->state &&
 885                     phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED))
 886                         goto irq_enable_err;
 887         }
 888
 889         /* reschedule state queue work to run as soon as possible */
 890         phy_trigger_machine(phydev, true);
 891         return;
 892
 893 ignore:
 894         atomic_dec(&phydev->irq_disable);
 895         enable_irq(phydev->irq);
 896         return;
 897
 898 irq_enable_err:
 899         disable_irq(phydev->irq);
 900         atomic_inc(&phydev->irq_disable);
 901 phy_err:
 902         phy_error(phydev);
 903 }
 904
 905 /**
 906  * phy_change_work - Scheduled by the phy_mac_interrupt to handle PHY changes
 907  * @work: work_struct that describes the work to be done
 908  */
 909 void phy_change_work(struct work_struct *work)
 910 {
 911         struct phy_device *phydev =
 912                 container_of(work, struct phy_device, phy_queue);
 913
 914         phy_change(phydev);
 915 }
 916
 917 /**
 918  * phy_stop - Bring down the PHY link, and stop checking the status
 919  * @phydev: target phy_device struct
 920  */
 921 void phy_stop(struct phy_device *phydev)
 922 {
 923         mutex_lock(&phydev->lock);
 924
 925         if (PHY_HALTED == phydev->state)
 926                 goto out_unlock;
 927
 928         if (phy_interrupt_is_valid(phydev)) {
 929                 /* Disable PHY Interrupts */
 930                 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 931
 932                 /* Clear any pending interrupts */
 933                 phy_clear_interrupt(phydev);
 934         }
 935
 936         phydev->state = PHY_HALTED;
 937
 938 out_unlock:
 939         mutex_unlock(&phydev->lock);
 940
 941         /* Cannot call flush_scheduled_work() here as desired because
 942          * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
 943          * will not reenable interrupts.
 944          */
 945 }
 946 EXPORT_SYMBOL(phy_stop);
 947
 948 /**
 949  * phy_start - start or restart a PHY device
 950  * @phydev: target phy_device struct
 951  *
 952  * Description: Indicates the attached device's readiness to
 953  *   handle PHY-related work.  Used during startup to start the
 954  *   PHY, and after a call to phy_stop() to resume operation.
 955  *   Also used to indicate the MDIO bus has cleared an error
 956  *   condition.
 957  */
 958 void phy_start(struct phy_device *phydev)
 959 {
 960         bool do_resume = false;
 961         int err = 0;
 962
 963         mutex_lock(&phydev->lock);
 964
 965         switch (phydev->state) {
 966         case PHY_STARTING:
 967                 phydev->state = PHY_PENDING;
 968                 break;
 969         case PHY_READY:
 970                 phydev->state = PHY_UP;
 971                 break;
 972         case PHY_HALTED:
 973                 /* make sure interrupts are re-enabled for the PHY */
 974                 if (phydev->irq != PHY_POLL) {
 975                         err = phy_enable_interrupts(phydev);
 976                         if (err < 0)
 977                                 break;
 978                 }
 979
 980                 phydev->state = PHY_RESUMING;
 981                 do_resume = true;
 982                 break;
 983         default:
 984                 break;
 985         }
 986         mutex_unlock(&phydev->lock);
 987
 988         /* if phy was suspended, bring the physical link up again */
 989         if (do_resume)
 990                 phy_resume(phydev);
 991
 992         phy_trigger_machine(phydev, true);
 993 }
 994 EXPORT_SYMBOL(phy_start);
 995
 996 static void phy_adjust_link(struct phy_device *phydev)
 997 {
 998         phydev->adjust_link(phydev->attached_dev);
 999         phy_led_trigger_change_speed(phydev);
1000 }
1001
1002 /**
1003  * phy_state_machine - Handle the state machine
1004  * @work: work_struct that describes the work to be done
1005  */
1006 void phy_state_machine(struct work_struct *work)
1007 {
1008         struct delayed_work *dwork = to_delayed_work(work);
1009         struct phy_device *phydev =
1010                         container_of(dwork, struct phy_device, state_queue);
1011         bool needs_aneg = false, do_suspend = false;
1012         enum phy_state old_state;
1013         int err = 0;
1014         int old_link;
1015
1016         mutex_lock(&phydev->lock);
1017
1018         old_state = phydev->state;
1019
1020         if (phydev->drv && phydev->drv->link_change_notify)
1021                 phydev->drv->link_change_notify(phydev);
1022
1023         switch (phydev->state) {
1024         case PHY_DOWN:
1025         case PHY_STARTING:
1026         case PHY_READY:
1027         case PHY_PENDING:
1028                 break;
1029         case PHY_UP:
1030                 needs_aneg = true;
1031
1032                 phydev->link_timeout = PHY_AN_TIMEOUT;
1033
1034                 break;
1035         case PHY_AN:
1036                 err = phy_read_status(phydev);
1037                 if (err < 0)
1038                         break;
1039
1040                 /* If the link is down, give up on negotiation for now */
1041                 if (!phydev->link) {
1042                         phydev->state = PHY_NOLINK;
1043                         netif_carrier_off(phydev->attached_dev);
1044                         phy_adjust_link(phydev);
1045                         break;
1046                 }
1047
1048                 /* Check if negotiation is done.  Break if there's an error */
1049                 err = phy_aneg_done(phydev);
1050                 if (err < 0)
1051                         break;
1052
1053                 /* If AN is done, we're running */
1054                 if (err > 0) {
1055                         phydev->state = PHY_RUNNING;
1056                         netif_carrier_on(phydev->attached_dev);
1057                         phy_adjust_link(phydev);
1058
1059                 } else if (0 == phydev->link_timeout--)
1060                         needs_aneg = true;
1061                 break;
1062         case PHY_NOLINK:
1063                 if (phy_interrupt_is_valid(phydev))
1064                         break;
1065
1066                 err = phy_read_status(phydev);
1067                 if (err)
1068                         break;
1069
1070                 if (phydev->link) {
1071                         if (AUTONEG_ENABLE == phydev->autoneg) {
1072                                 err = phy_aneg_done(phydev);
1073                                 if (err < 0)
1074                                         break;
1075
1076                                 if (!err) {
1077                                         phydev->state = PHY_AN;
1078                                         phydev->link_timeout = PHY_AN_TIMEOUT;
1079                                         break;
1080                                 }
1081                         }
1082                         phydev->state = PHY_RUNNING;
1083                         netif_carrier_on(phydev->attached_dev);
1084                         phy_adjust_link(phydev);
1085                 }
1086                 break;
1087         case PHY_FORCING:
1088                 err = genphy_update_link(phydev);
1089                 if (err)
1090                         break;
1091
1092                 if (phydev->link) {
1093                         phydev->state = PHY_RUNNING;
1094                         netif_carrier_on(phydev->attached_dev);
1095                 } else {
1096                         if (0 == phydev->link_timeout--)
1097                                 needs_aneg = true;
1098                 }
1099
1100                 phy_adjust_link(phydev);
1101                 break;
1102         case PHY_RUNNING:
1103                 /* Only register a CHANGE if we are polling and link changed
1104                  * since latest checking.
1105                  */
1106                 if (phydev->irq == PHY_POLL) {
1107                         old_link = phydev->link;
1108                         err = phy_read_status(phydev);
1109                         if (err)
1110                                 break;
1111
1112                         if (old_link != phydev->link)
1113                                 phydev->state = PHY_CHANGELINK;
1114                 }
1115                 /*
1116                  * Failsafe: check that nobody set phydev->link=0 between two
1117                  * poll cycles, otherwise we won't leave RUNNING state as long
1118                  * as link remains down.
1119                  */
1120                 if (!phydev->link && phydev->state == PHY_RUNNING) {
1121                         phydev->state = PHY_CHANGELINK;
1122                         phydev_err(phydev, "no link in PHY_RUNNING\n");
1123                 }
1124                 break;
1125         case PHY_CHANGELINK:
1126                 err = phy_read_status(phydev);
1127                 if (err)
1128                         break;
1129
1130                 if (phydev->link) {
1131                         phydev->state = PHY_RUNNING;
1132                         netif_carrier_on(phydev->attached_dev);
1133                 } else {
1134                         phydev->state = PHY_NOLINK;
1135                         netif_carrier_off(phydev->attached_dev);
1136                 }
1137
1138                 phy_adjust_link(phydev);
1139
1140                 if (phy_interrupt_is_valid(phydev))
1141                         err = phy_config_interrupt(phydev,
1142                                                    PHY_INTERRUPT_ENABLED);
1143                 break;
1144         case PHY_HALTED:
1145                 if (phydev->link) {
1146                         phydev->link = 0;
1147                         netif_carrier_off(phydev->attached_dev);
1148                         phy_adjust_link(phydev);
1149                         do_suspend = true;
1150                 }
1151                 break;
1152         case PHY_RESUMING:
1153                 if (AUTONEG_ENABLE == phydev->autoneg) {
1154                         err = phy_aneg_done(phydev);
1155                         if (err < 0)
1156                                 break;
1157
1158                         /* err > 0 if AN is done.
1159                          * Otherwise, it's 0, and we're  still waiting for AN
1160                          */
1161                         if (err > 0) {
1162                                 err = phy_read_status(phydev);
1163                                 if (err)
1164                                         break;
1165
1166                                 if (phydev->link) {
1167                                         phydev->state = PHY_RUNNING;
1168                                         netif_carrier_on(phydev->attached_dev);
1169                                 } else  {
1170                                         phydev->state = PHY_NOLINK;
1171                                 }
1172                                 phy_adjust_link(phydev);
1173                         } else {
1174                                 phydev->state = PHY_AN;
1175                                 phydev->link_timeout = PHY_AN_TIMEOUT;
1176                         }
1177                 } else {
1178                         err = phy_read_status(phydev);
1179                         if (err)
1180                                 break;
1181
1182                         if (phydev->link) {
1183                                 phydev->state = PHY_RUNNING;
1184                                 netif_carrier_on(phydev->attached_dev);
1185                         } else  {
1186                                 phydev->state = PHY_NOLINK;
1187                         }
1188                         phy_adjust_link(phydev);
1189                 }
1190                 break;
1191         }
1192
1193         mutex_unlock(&phydev->lock);
1194
1195         if (needs_aneg)
1196                 err = phy_start_aneg_priv(phydev, false);
1197         else if (do_suspend)
1198                 phy_suspend(phydev);
1199
1200         if (err < 0)
1201                 phy_error(phydev);
1202
1203         if (old_state != phydev->state)
1204                 phydev_dbg(phydev, "PHY state change %s -> %s\n",
1205                            phy_state_to_str(old_state),
1206                            phy_state_to_str(phydev->state));
1207
1208         /* Only re-schedule a PHY state machine change if we are polling the
1209          * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
1210          * between states from phy_mac_interrupt()
1211          */
1212         if (phydev->irq == PHY_POLL)
1213                 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
1214                                    PHY_STATE_TIME * HZ);
1215 }
1216
1217 /**
1218  * phy_mac_interrupt - MAC says the link has changed
1219  * @phydev: phy_device struct with changed link
1220  * @new_link: Link is Up/Down.
1221  *
1222  * Description: The MAC layer is able indicate there has been a change
1223  *   in the PHY link status. Set the new link status, and trigger the
1224  *   state machine, work a work queue.
1225  */
1226 void phy_mac_interrupt(struct phy_device *phydev, int new_link)
1227 {
1228         phydev->link = new_link;
1229
1230         /* Trigger a state machine change */
1231         queue_work(system_power_efficient_wq, &phydev->phy_queue);
1232 }
1233 EXPORT_SYMBOL(phy_mac_interrupt);
1234
1235 /**
1236  * phy_init_eee - init and check the EEE feature
1237  * @phydev: target phy_device struct
1238  * @clk_stop_enable: PHY may stop the clock during LPI
1239  *
1240  * Description: it checks if the Energy-Efficient Ethernet (EEE)
1241  * is supported by looking at the MMD registers 3.20 and 7.60/61
1242  * and it programs the MMD register 3.0 setting the "Clock stop enable"
1243  * bit if required.
1244  */
1245 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1246 {
1247         if (!phydev->drv)
1248                 return -EIO;
1249
1250         /* According to 802.3az,the EEE is supported only in full duplex-mode.
1251          */
1252         if (phydev->duplex == DUPLEX_FULL) {
1253                 int eee_lp, eee_cap, eee_adv;
1254                 u32 lp, cap, adv;
1255                 int status;
1256
1257                 /* Read phy status to properly get the right settings */
1258                 status = phy_read_status(phydev);
1259                 if (status)
1260                         return status;
1261
1262                 /* First check if the EEE ability is supported */
1263                 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1264                 if (eee_cap <= 0)
1265                         goto eee_exit_err;
1266
1267                 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1268                 if (!cap)
1269                         goto eee_exit_err;
1270
1271                 /* Check which link settings negotiated and verify it in
1272                  * the EEE advertising registers.
1273                  */
1274                 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1275                 if (eee_lp <= 0)
1276                         goto eee_exit_err;
1277
1278                 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1279                 if (eee_adv <= 0)
1280                         goto eee_exit_err;
1281
1282                 adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
1283                 lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
1284                 if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv))
1285                         goto eee_exit_err;
1286
1287                 if (clk_stop_enable) {
1288                         /* Configure the PHY to stop receiving xMII
1289                          * clock while it is signaling LPI.
1290                          */
1291                         int val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
1292                         if (val < 0)
1293                                 return val;
1294
1295                         val |= MDIO_PCS_CTRL1_CLKSTOP_EN;
1296                         phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, val);
1297                 }
1298
1299                 return 0; /* EEE supported */
1300         }
1301 eee_exit_err:
1302         return -EPROTONOSUPPORT;
1303 }
1304 EXPORT_SYMBOL(phy_init_eee);
1305
1306 /**
1307  * phy_get_eee_err - report the EEE wake error count
1308  * @phydev: target phy_device struct
1309  *
1310  * Description: it is to report the number of time where the PHY
1311  * failed to complete its normal wake sequence.
1312  */
1313 int phy_get_eee_err(struct phy_device *phydev)
1314 {
1315         if (!phydev->drv)
1316                 return -EIO;
1317
1318         return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1319 }
1320 EXPORT_SYMBOL(phy_get_eee_err);
1321
1322 /**
1323  * phy_ethtool_get_eee - get EEE supported and status
1324  * @phydev: target phy_device struct
1325  * @data: ethtool_eee data
1326  *
1327  * Description: it reportes the Supported/Advertisement/LP Advertisement
1328  * capabilities.
1329  */
1330 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1331 {
1332         int val;
1333
1334         if (!phydev->drv)
1335                 return -EIO;
1336
1337         /* Get Supported EEE */
1338         val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1339         if (val < 0)
1340                 return val;
1341         data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1342
1343         /* Get advertisement EEE */
1344         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1345         if (val < 0)
1346                 return val;
1347         data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1348
1349         /* Get LP advertisement EEE */
1350         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1351         if (val < 0)
1352                 return val;
1353         data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1354
1355         return 0;
1356 }
1357 EXPORT_SYMBOL(phy_ethtool_get_eee);
1358
1359 /**
1360  * phy_ethtool_set_eee - set EEE supported and status
1361  * @phydev: target phy_device struct
1362  * @data: ethtool_eee data
1363  *
1364  * Description: it is to program the Advertisement EEE register.
1365  */
1366 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1367 {
1368         int cap, old_adv, adv, ret;
1369
1370         if (!phydev->drv)
1371                 return -EIO;
1372
1373         /* Get Supported EEE */
1374         cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1375         if (cap < 0)
1376                 return cap;
1377
1378         old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1379         if (old_adv < 0)
1380                 return old_adv;
1381
1382         adv = ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1383
1384         /* Mask prohibited EEE modes */
1385         adv &= ~phydev->eee_broken_modes;
1386
1387         if (old_adv != adv) {
1388                 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1389                 if (ret < 0)
1390                         return ret;
1391
1392                 /* Restart autonegotiation so the new modes get sent to the
1393                  * link partner.
1394                  */
1395                 ret = phy_restart_aneg(phydev);
1396                 if (ret < 0)
1397                         return ret;
1398         }
1399
1400         return 0;
1401 }
1402 EXPORT_SYMBOL(phy_ethtool_set_eee);
1403
1404 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1405 {
1406         if (phydev->drv && phydev->drv->set_wol)
1407                 return phydev->drv->set_wol(phydev, wol);
1408
1409         return -EOPNOTSUPP;
1410 }
1411 EXPORT_SYMBOL(phy_ethtool_set_wol);
1412
1413 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1414 {
1415         if (phydev->drv && phydev->drv->get_wol)
1416                 phydev->drv->get_wol(phydev, wol);
1417 }
1418 EXPORT_SYMBOL(phy_ethtool_get_wol);
1419
1420 int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1421                                    struct ethtool_link_ksettings *cmd)
1422 {
1423         struct phy_device *phydev = ndev->phydev;
1424
1425         if (!phydev)
1426                 return -ENODEV;
1427
1428         phy_ethtool_ksettings_get(phydev, cmd);
1429
1430         return 0;
1431 }
1432 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1433
1434 int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1435                                    const struct ethtool_link_ksettings *cmd)
1436 {
1437         struct phy_device *phydev = ndev->phydev;
1438
1439         if (!phydev)
1440                 return -ENODEV;
1441
1442         return phy_ethtool_ksettings_set(phydev, cmd);
1443 }
1444 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1445
1446 int phy_ethtool_nway_reset(struct net_device *ndev)
1447 {
1448         struct phy_device *phydev = ndev->phydev;
1449
1450         if (!phydev)
1451                 return -ENODEV;
1452
1453         if (!phydev->drv)
1454                 return -EIO;
1455
1456         return phy_restart_aneg(phydev);
1457 }
1458 EXPORT_SYMBOL(phy_ethtool_nway_reset);