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/timer.h>
  34 #include <linux/workqueue.h>
  35 #include <linux/mdio.h>
  36 #include <linux/io.h>
  37 #include <linux/uaccess.h>
  38 #include <linux/atomic.h>
  39
  40 #include <asm/irq.h>
  41
  42 static const char *phy_speed_to_str(int speed)
  43 {
  44         switch (speed) {
  45         case SPEED_10:
  46                 return "10Mbps";
  47         case SPEED_100:
  48                 return "100Mbps";
  49         case SPEED_1000:
  50                 return "1Gbps";
  51         case SPEED_2500:
  52                 return "2.5Gbps";
  53         case SPEED_5000:
  54                 return "5Gbps";
  55         case SPEED_10000:
  56                 return "10Gbps";
  57         case SPEED_20000:
  58                 return "20Gbps";
  59         case SPEED_25000:
  60                 return "25Gbps";
  61         case SPEED_40000:
  62                 return "40Gbps";
  63         case SPEED_50000:
  64                 return "50Gbps";
  65         case SPEED_56000:
  66                 return "56Gbps";
  67         case SPEED_100000:
  68                 return "100Gbps";
  69         case SPEED_UNKNOWN:
  70                 return "Unknown";
  71         default:
  72                 return "Unsupported (update phy.c)";
  73         }
  74 }
  75
  76 #define PHY_STATE_STR(_state)                   \
  77         case PHY_##_state:                      \
  78                 return __stringify(_state);     \
  79
  80 static const char *phy_state_to_str(enum phy_state st)
  81 {
  82         switch (st) {
  83         PHY_STATE_STR(DOWN)
  84         PHY_STATE_STR(STARTING)
  85         PHY_STATE_STR(READY)
  86         PHY_STATE_STR(PENDING)
  87         PHY_STATE_STR(UP)
  88         PHY_STATE_STR(AN)
  89         PHY_STATE_STR(RUNNING)
  90         PHY_STATE_STR(NOLINK)
  91         PHY_STATE_STR(FORCING)
  92         PHY_STATE_STR(CHANGELINK)
  93         PHY_STATE_STR(HALTED)
  94         PHY_STATE_STR(RESUMING)
  95         }
  96
  97         return NULL;
  98 }
  99
 100
 101 /**
 102  * phy_print_status - Convenience function to print out the current phy status
 103  * @phydev: the phy_device struct
 104  */
 105 void phy_print_status(struct phy_device *phydev)
 106 {
 107         if (phydev->link) {
 108                 netdev_info(phydev->attached_dev,
 109                         "Link is Up - %s/%s - flow control %s\n",
 110                         phy_speed_to_str(phydev->speed),
 111                         DUPLEX_FULL == phydev->duplex ? "Full" : "Half",
 112                         phydev->pause ? "rx/tx" : "off");
 113         } else  {
 114                 netdev_info(phydev->attached_dev, "Link is Down\n");
 115         }
 116 }
 117 EXPORT_SYMBOL(phy_print_status);
 118
 119 /**
 120  * phy_clear_interrupt - Ack the phy device's interrupt
 121  * @phydev: the phy_device struct
 122  *
 123  * If the @phydev driver has an ack_interrupt function, call it to
 124  * ack and clear the phy device's interrupt.
 125  *
 126  * Returns 0 on success or < 0 on error.
 127  */
 128 static int phy_clear_interrupt(struct phy_device *phydev)
 129 {
 130         if (phydev->drv->ack_interrupt)
 131                 return phydev->drv->ack_interrupt(phydev);
 132
 133         return 0;
 134 }
 135
 136 /**
 137  * phy_config_interrupt - configure the PHY device for the requested interrupts
 138  * @phydev: the phy_device struct
 139  * @interrupts: interrupt flags to configure for this @phydev
 140  *
 141  * Returns 0 on success or < 0 on error.
 142  */
 143 static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
 144 {
 145         phydev->interrupts = interrupts;
 146         if (phydev->drv->config_intr)
 147                 return phydev->drv->config_intr(phydev);
 148
 149         return 0;
 150 }
 151
 152
 153 /**
 154  * phy_aneg_done - return auto-negotiation status
 155  * @phydev: target phy_device struct
 156  *
 157  * Description: Return the auto-negotiation status from this @phydev
 158  * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
 159  * is still pending.
 160  */
 161 int phy_aneg_done(struct phy_device *phydev)
 162 {
 163         if (phydev->drv && phydev->drv->aneg_done)
 164                 return phydev->drv->aneg_done(phydev);
 165
 166         return genphy_aneg_done(phydev);
 167 }
 168 EXPORT_SYMBOL(phy_aneg_done);
 169
 170 /* A structure for mapping a particular speed and duplex
 171  * combination to a particular SUPPORTED and ADVERTISED value
 172  */
 173 struct phy_setting {
 174         int speed;
 175         int duplex;
 176         u32 setting;
 177 };
 178
 179 /* A mapping of all SUPPORTED settings to speed/duplex.  This table
 180  * must be grouped by speed and sorted in descending match priority
 181  * - iow, descending speed. */
 182 static const struct phy_setting settings[] = {
 183         {
 184                 .speed = SPEED_10000,
 185                 .duplex = DUPLEX_FULL,
 186                 .setting = SUPPORTED_10000baseKR_Full,
 187         },
 188         {
 189                 .speed = SPEED_10000,
 190                 .duplex = DUPLEX_FULL,
 191                 .setting = SUPPORTED_10000baseKX4_Full,
 192         },
 193         {
 194                 .speed = SPEED_10000,
 195                 .duplex = DUPLEX_FULL,
 196                 .setting = SUPPORTED_10000baseT_Full,
 197         },
 198         {
 199                 .speed = SPEED_2500,
 200                 .duplex = DUPLEX_FULL,
 201                 .setting = SUPPORTED_2500baseX_Full,
 202         },
 203         {
 204                 .speed = SPEED_1000,
 205                 .duplex = DUPLEX_FULL,
 206                 .setting = SUPPORTED_1000baseKX_Full,
 207         },
 208         {
 209                 .speed = SPEED_1000,
 210                 .duplex = DUPLEX_FULL,
 211                 .setting = SUPPORTED_1000baseT_Full,
 212         },
 213         {
 214                 .speed = SPEED_1000,
 215                 .duplex = DUPLEX_HALF,
 216                 .setting = SUPPORTED_1000baseT_Half,
 217         },
 218         {
 219                 .speed = SPEED_100,
 220                 .duplex = DUPLEX_FULL,
 221                 .setting = SUPPORTED_100baseT_Full,
 222         },
 223         {
 224                 .speed = SPEED_100,
 225                 .duplex = DUPLEX_HALF,
 226                 .setting = SUPPORTED_100baseT_Half,
 227         },
 228         {
 229                 .speed = SPEED_10,
 230                 .duplex = DUPLEX_FULL,
 231                 .setting = SUPPORTED_10baseT_Full,
 232         },
 233         {
 234                 .speed = SPEED_10,
 235                 .duplex = DUPLEX_HALF,
 236                 .setting = SUPPORTED_10baseT_Half,
 237         },
 238 };
 239
 240 /**
 241  * phy_lookup_setting - lookup a PHY setting
 242  * @speed: speed to match
 243  * @duplex: duplex to match
 244  * @feature: allowed link modes
 245  * @exact: an exact match is required
 246  *
 247  * Search the settings array for a setting that matches the speed and
 248  * duplex, and which is supported.
 249  *
 250  * If @exact is unset, either an exact match or %NULL for no match will
 251  * be returned.
 252  *
 253  * If @exact is set, an exact match, the fastest supported setting at
 254  * or below the specified speed, the slowest supported setting, or if
 255  * they all fail, %NULL will be returned.
 256  */
 257 static const struct phy_setting *
 258 phy_lookup_setting(int speed, int duplex, u32 features, bool exact)
 259 {
 260         const struct phy_setting *p, *match = NULL, *last = NULL;
 261         int i;
 262
 263         for (i = 0, p = settings; i < ARRAY_SIZE(settings); i++, p++) {
 264                 if (p->setting & features) {
 265                         last = p;
 266                         if (p->speed == speed && p->duplex == duplex) {
 267                                 /* Exact match for speed and duplex */
 268                                 match = p;
 269                                 break;
 270                         } else if (!exact) {
 271                                 if (!match && p->speed <= speed)
 272                                         /* Candidate */
 273                                         match = p;
 274
 275                                 if (p->speed < speed)
 276                                         break;
 277                         }
 278                 }
 279         }
 280
 281         if (!match && !exact)
 282                 match = last;
 283
 284         return match;
 285 }
 286
 287 /**
 288  * phy_find_valid - find a PHY setting that matches the requested parameters
 289  * @speed: desired speed
 290  * @duplex: desired duplex
 291  * @supported: mask of supported link modes
 292  *
 293  * Locate a supported phy setting that is, in priority order:
 294  * - an exact match for the specified speed and duplex mode
 295  * - a match for the specified speed, or slower speed
 296  * - the slowest supported speed
 297  * Returns the matched phy_setting entry, or %NULL if no supported phy
 298  * settings were found.
 299  */
 300 static const struct phy_setting *
 301 phy_find_valid(int speed, int duplex, u32 supported)
 302 {
 303         return phy_lookup_setting(speed, duplex, supported, false);
 304 }
 305
 306 /**
 307  * phy_supported_speeds - return all speeds currently supported by a phy device
 308  * @phy: The phy device to return supported speeds of.
 309  * @speeds: buffer to store supported speeds in.
 310  * @size:   size of speeds buffer.
 311  *
 312  * Description: Returns the number of supported speeds, and fills the speeds
 313  * buffer with the supported speeds. If speeds buffer is too small to contain
 314  * all currently supported speeds, will return as many speeds as can fit.
 315  */
 316 unsigned int phy_supported_speeds(struct phy_device *phy,
 317                                   unsigned int *speeds,
 318                                   unsigned int size)
 319 {
 320         unsigned int count = 0;
 321         unsigned int idx = 0;
 322
 323         for (idx = 0; idx < ARRAY_SIZE(settings) && count < size; idx++) {
 324                 if (!(settings[idx].setting & phy->supported))
 325                         continue;
 326
 327                 /* Assumes settings are grouped by speed */
 328                 if ((count == 0) ||
 329                     (speeds[count - 1] != settings[idx].speed)) {
 330                         speeds[count] = settings[idx].speed;
 331                         count++;
 332                 }
 333         }
 334
 335         return count;
 336 }
 337
 338 /**
 339  * phy_check_valid - check if there is a valid PHY setting which matches
 340  *                   speed, duplex, and feature mask
 341  * @speed: speed to match
 342  * @duplex: duplex to match
 343  * @features: A mask of the valid settings
 344  *
 345  * Description: Returns true if there is a valid setting, false otherwise.
 346  */
 347 static inline bool phy_check_valid(int speed, int duplex, u32 features)
 348 {
 349         return !!phy_lookup_setting(speed, duplex, features, true);
 350 }
 351
 352 /**
 353  * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
 354  * @phydev: the target phy_device struct
 355  *
 356  * Description: Make sure the PHY is set to supported speeds and
 357  *   duplexes.  Drop down by one in this order:  1000/FULL,
 358  *   1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
 359  */
 360 static void phy_sanitize_settings(struct phy_device *phydev)
 361 {
 362         const struct phy_setting *setting;
 363         u32 features = phydev->supported;
 364
 365         /* Sanitize settings based on PHY capabilities */
 366         if ((features & SUPPORTED_Autoneg) == 0)
 367                 phydev->autoneg = AUTONEG_DISABLE;
 368
 369         setting = phy_find_valid(phydev->speed, phydev->duplex, features);
 370         if (setting) {
 371                 phydev->speed = setting->speed;
 372                 phydev->duplex = setting->duplex;
 373         } else {
 374                 /* We failed to find anything (no supported speeds?) */
 375                 phydev->speed = SPEED_UNKNOWN;
 376                 phydev->duplex = DUPLEX_UNKNOWN;
 377         }
 378 }
 379
 380 /**
 381  * phy_ethtool_sset - generic ethtool sset function, handles all the details
 382  * @phydev: target phy_device struct
 383  * @cmd: ethtool_cmd
 384  *
 385  * A few notes about parameter checking:
 386  * - We don't set port or transceiver, so we don't care what they
 387  *   were set to.
 388  * - phy_start_aneg() will make sure forced settings are sane, and
 389  *   choose the next best ones from the ones selected, so we don't
 390  *   care if ethtool tries to give us bad values.
 391  */
 392 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
 393 {
 394         u32 speed = ethtool_cmd_speed(cmd);
 395
 396         if (cmd->phy_address != phydev->mdio.addr)
 397                 return -EINVAL;
 398
 399         /* We make sure that we don't pass unsupported values in to the PHY */
 400         cmd->advertising &= phydev->supported;
 401
 402         /* Verify the settings we care about. */
 403         if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
 404                 return -EINVAL;
 405
 406         if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
 407                 return -EINVAL;
 408
 409         if (cmd->autoneg == AUTONEG_DISABLE &&
 410             ((speed != SPEED_1000 &&
 411               speed != SPEED_100 &&
 412               speed != SPEED_10) ||
 413              (cmd->duplex != DUPLEX_HALF &&
 414               cmd->duplex != DUPLEX_FULL)))
 415                 return -EINVAL;
 416
 417         phydev->autoneg = cmd->autoneg;
 418
 419         phydev->speed = speed;
 420
 421         phydev->advertising = cmd->advertising;
 422
 423         if (AUTONEG_ENABLE == cmd->autoneg)
 424                 phydev->advertising |= ADVERTISED_Autoneg;
 425         else
 426                 phydev->advertising &= ~ADVERTISED_Autoneg;
 427
 428         phydev->duplex = cmd->duplex;
 429
 430         phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl;
 431
 432         /* Restart the PHY */
 433         phy_start_aneg(phydev);
 434
 435         return 0;
 436 }
 437 EXPORT_SYMBOL(phy_ethtool_sset);
 438
 439 int phy_ethtool_ksettings_set(struct phy_device *phydev,
 440                               const struct ethtool_link_ksettings *cmd)
 441 {
 442         u8 autoneg = cmd->base.autoneg;
 443         u8 duplex = cmd->base.duplex;
 444         u32 speed = cmd->base.speed;
 445         u32 advertising;
 446
 447         if (cmd->base.phy_address != phydev->mdio.addr)
 448                 return -EINVAL;
 449
 450         ethtool_convert_link_mode_to_legacy_u32(&advertising,
 451                                                 cmd->link_modes.advertising);
 452
 453         /* We make sure that we don't pass unsupported values in to the PHY */
 454         advertising &= phydev->supported;
 455
 456         /* Verify the settings we care about. */
 457         if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
 458                 return -EINVAL;
 459
 460         if (autoneg == AUTONEG_ENABLE && advertising == 0)
 461                 return -EINVAL;
 462
 463         if (autoneg == AUTONEG_DISABLE &&
 464             ((speed != SPEED_1000 &&
 465               speed != SPEED_100 &&
 466               speed != SPEED_10) ||
 467              (duplex != DUPLEX_HALF &&
 468               duplex != DUPLEX_FULL)))
 469                 return -EINVAL;
 470
 471         phydev->autoneg = autoneg;
 472
 473         phydev->speed = speed;
 474
 475         phydev->advertising = advertising;
 476
 477         if (autoneg == AUTONEG_ENABLE)
 478                 phydev->advertising |= ADVERTISED_Autoneg;
 479         else
 480                 phydev->advertising &= ~ADVERTISED_Autoneg;
 481
 482         phydev->duplex = duplex;
 483
 484         phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
 485
 486         /* Restart the PHY */
 487         phy_start_aneg(phydev);
 488
 489         return 0;
 490 }
 491 EXPORT_SYMBOL(phy_ethtool_ksettings_set);
 492
 493 int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
 494 {
 495         cmd->supported = phydev->supported;
 496
 497         cmd->advertising = phydev->advertising;
 498         cmd->lp_advertising = phydev->lp_advertising;
 499
 500         ethtool_cmd_speed_set(cmd, phydev->speed);
 501         cmd->duplex = phydev->duplex;
 502         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 503                 cmd->port = PORT_BNC;
 504         else
 505                 cmd->port = PORT_MII;
 506         cmd->phy_address = phydev->mdio.addr;
 507         cmd->transceiver = phy_is_internal(phydev) ?
 508                 XCVR_INTERNAL : XCVR_EXTERNAL;
 509         cmd->autoneg = phydev->autoneg;
 510         cmd->eth_tp_mdix_ctrl = phydev->mdix_ctrl;
 511         cmd->eth_tp_mdix = phydev->mdix;
 512
 513         return 0;
 514 }
 515 EXPORT_SYMBOL(phy_ethtool_gset);
 516
 517 int phy_ethtool_ksettings_get(struct phy_device *phydev,
 518                               struct ethtool_link_ksettings *cmd)
 519 {
 520         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
 521                                                 phydev->supported);
 522
 523         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
 524                                                 phydev->advertising);
 525
 526         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
 527                                                 phydev->lp_advertising);
 528
 529         cmd->base.speed = phydev->speed;
 530         cmd->base.duplex = phydev->duplex;
 531         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 532                 cmd->base.port = PORT_BNC;
 533         else
 534                 cmd->base.port = PORT_MII;
 535
 536         cmd->base.phy_address = phydev->mdio.addr;
 537         cmd->base.autoneg = phydev->autoneg;
 538         cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
 539         cmd->base.eth_tp_mdix = phydev->mdix;
 540
 541         return 0;
 542 }
 543 EXPORT_SYMBOL(phy_ethtool_ksettings_get);
 544
 545 /**
 546  * phy_mii_ioctl - generic PHY MII ioctl interface
 547  * @phydev: the phy_device struct
 548  * @ifr: &struct ifreq for socket ioctl's
 549  * @cmd: ioctl cmd to execute
 550  *
 551  * Note that this function is currently incompatible with the
 552  * PHYCONTROL layer.  It changes registers without regard to
 553  * current state.  Use at own risk.
 554  */
 555 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
 556 {
 557         struct mii_ioctl_data *mii_data = if_mii(ifr);
 558         u16 val = mii_data->val_in;
 559         bool change_autoneg = false;
 560
 561         switch (cmd) {
 562         case SIOCGMIIPHY:
 563                 mii_data->phy_id = phydev->mdio.addr;
 564                 /* fall through */
 565
 566         case SIOCGMIIREG:
 567                 mii_data->val_out = mdiobus_read(phydev->mdio.bus,
 568                                                  mii_data->phy_id,
 569                                                  mii_data->reg_num);
 570                 return 0;
 571
 572         case SIOCSMIIREG:
 573                 if (mii_data->phy_id == phydev->mdio.addr) {
 574                         switch (mii_data->reg_num) {
 575                         case MII_BMCR:
 576                                 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
 577                                         if (phydev->autoneg == AUTONEG_ENABLE)
 578                                                 change_autoneg = true;
 579                                         phydev->autoneg = AUTONEG_DISABLE;
 580                                         if (val & BMCR_FULLDPLX)
 581                                                 phydev->duplex = DUPLEX_FULL;
 582                                         else
 583                                                 phydev->duplex = DUPLEX_HALF;
 584                                         if (val & BMCR_SPEED1000)
 585                                                 phydev->speed = SPEED_1000;
 586                                         else if (val & BMCR_SPEED100)
 587                                                 phydev->speed = SPEED_100;
 588                                         else phydev->speed = SPEED_10;
 589                                 }
 590                                 else {
 591                                         if (phydev->autoneg == AUTONEG_DISABLE)
 592                                                 change_autoneg = true;
 593                                         phydev->autoneg = AUTONEG_ENABLE;
 594                                 }
 595                                 break;
 596                         case MII_ADVERTISE:
 597                                 phydev->advertising = mii_adv_to_ethtool_adv_t(val);
 598                                 change_autoneg = true;
 599                                 break;
 600                         default:
 601                                 /* do nothing */
 602                                 break;
 603                         }
 604                 }
 605
 606                 mdiobus_write(phydev->mdio.bus, mii_data->phy_id,
 607                               mii_data->reg_num, val);
 608
 609                 if (mii_data->phy_id == phydev->mdio.addr &&
 610                     mii_data->reg_num == MII_BMCR &&
 611                     val & BMCR_RESET)
 612                         return phy_init_hw(phydev);
 613
 614                 if (change_autoneg)
 615                         return phy_start_aneg(phydev);
 616
 617                 return 0;
 618
 619         case SIOCSHWTSTAMP:
 620                 if (phydev->drv && phydev->drv->hwtstamp)
 621                         return phydev->drv->hwtstamp(phydev, ifr);
 622                 /* fall through */
 623
 624         default:
 625                 return -EOPNOTSUPP;
 626         }
 627 }
 628 EXPORT_SYMBOL(phy_mii_ioctl);
 629
 630 /**
 631  * phy_start_aneg - start auto-negotiation for this PHY device
 632  * @phydev: the phy_device struct
 633  *
 634  * Description: Sanitizes the settings (if we're not autonegotiating
 635  *   them), and then calls the driver's config_aneg function.
 636  *   If the PHYCONTROL Layer is operating, we change the state to
 637  *   reflect the beginning of Auto-negotiation or forcing.
 638  */
 639 int phy_start_aneg(struct phy_device *phydev)
 640 {
 641         int err;
 642
 643         if (!phydev->drv)
 644                 return -EIO;
 645
 646         mutex_lock(&phydev->lock);
 647
 648         if (AUTONEG_DISABLE == phydev->autoneg)
 649                 phy_sanitize_settings(phydev);
 650
 651         /* Invalidate LP advertising flags */
 652         phydev->lp_advertising = 0;
 653
 654         err = phydev->drv->config_aneg(phydev);
 655         if (err < 0)
 656                 goto out_unlock;
 657
 658         if (phydev->state != PHY_HALTED) {
 659                 if (AUTONEG_ENABLE == phydev->autoneg) {
 660                         phydev->state = PHY_AN;
 661                         phydev->link_timeout = PHY_AN_TIMEOUT;
 662                 } else {
 663                         phydev->state = PHY_FORCING;
 664                         phydev->link_timeout = PHY_FORCE_TIMEOUT;
 665                 }
 666         }
 667
 668 out_unlock:
 669         mutex_unlock(&phydev->lock);
 670         return err;
 671 }
 672 EXPORT_SYMBOL(phy_start_aneg);
 673
 674 /**
 675  * phy_start_machine - start PHY state machine tracking
 676  * @phydev: the phy_device struct
 677  *
 678  * Description: The PHY infrastructure can run a state machine
 679  *   which tracks whether the PHY is starting up, negotiating,
 680  *   etc.  This function starts the timer which tracks the state
 681  *   of the PHY.  If you want to maintain your own state machine,
 682  *   do not call this function.
 683  */
 684 void phy_start_machine(struct phy_device *phydev)
 685 {
 686         queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
 687 }
 688
 689 /**
 690  * phy_trigger_machine - trigger the state machine to run
 691  *
 692  * @phydev: the phy_device struct
 693  * @sync: indicate whether we should wait for the workqueue cancelation
 694  *
 695  * Description: There has been a change in state which requires that the
 696  *   state machine runs.
 697  */
 698
 699 static void phy_trigger_machine(struct phy_device *phydev, bool sync)
 700 {
 701         if (sync)
 702                 cancel_delayed_work_sync(&phydev->state_queue);
 703         else
 704                 cancel_delayed_work(&phydev->state_queue);
 705         queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
 706 }
 707
 708 /**
 709  * phy_stop_machine - stop the PHY state machine tracking
 710  * @phydev: target phy_device struct
 711  *
 712  * Description: Stops the state machine timer, sets the state to UP
 713  *   (unless it wasn't up yet). This function must be called BEFORE
 714  *   phy_detach.
 715  */
 716 void phy_stop_machine(struct phy_device *phydev)
 717 {
 718         cancel_delayed_work_sync(&phydev->state_queue);
 719
 720         mutex_lock(&phydev->lock);
 721         if (phydev->state > PHY_UP && phydev->state != PHY_HALTED)
 722                 phydev->state = PHY_UP;
 723         mutex_unlock(&phydev->lock);
 724 }
 725
 726 /**
 727  * phy_error - enter HALTED state for this PHY device
 728  * @phydev: target phy_device struct
 729  *
 730  * Moves the PHY to the HALTED state in response to a read
 731  * or write error, and tells the controller the link is down.
 732  * Must not be called from interrupt context, or while the
 733  * phydev->lock is held.
 734  */
 735 static void phy_error(struct phy_device *phydev)
 736 {
 737         mutex_lock(&phydev->lock);
 738         phydev->state = PHY_HALTED;
 739         mutex_unlock(&phydev->lock);
 740
 741         phy_trigger_machine(phydev, false);
 742 }
 743
 744 /**
 745  * phy_interrupt - PHY interrupt handler
 746  * @irq: interrupt line
 747  * @phy_dat: phy_device pointer
 748  *
 749  * Description: When a PHY interrupt occurs, the handler disables
 750  * interrupts, and uses phy_change to handle the interrupt.
 751  */
 752 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
 753 {
 754         struct phy_device *phydev = phy_dat;
 755
 756         if (PHY_HALTED == phydev->state)
 757                 return IRQ_NONE;                /* It can't be ours.  */
 758
 759         disable_irq_nosync(irq);
 760         atomic_inc(&phydev->irq_disable);
 761
 762         phy_change(phydev);
 763
 764         return IRQ_HANDLED;
 765 }
 766
 767 /**
 768  * phy_enable_interrupts - Enable the interrupts from the PHY side
 769  * @phydev: target phy_device struct
 770  */
 771 static int phy_enable_interrupts(struct phy_device *phydev)
 772 {
 773         int err = phy_clear_interrupt(phydev);
 774
 775         if (err < 0)
 776                 return err;
 777
 778         return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
 779 }
 780
 781 /**
 782  * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
 783  * @phydev: target phy_device struct
 784  */
 785 static int phy_disable_interrupts(struct phy_device *phydev)
 786 {
 787         int err;
 788
 789         /* Disable PHY interrupts */
 790         err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 791         if (err)
 792                 goto phy_err;
 793
 794         /* Clear the interrupt */
 795         err = phy_clear_interrupt(phydev);
 796         if (err)
 797                 goto phy_err;
 798
 799         return 0;
 800
 801 phy_err:
 802         phy_error(phydev);
 803
 804         return err;
 805 }
 806
 807 /**
 808  * phy_start_interrupts - request and enable interrupts for a PHY device
 809  * @phydev: target phy_device struct
 810  *
 811  * Description: Request the interrupt for the given PHY.
 812  *   If this fails, then we set irq to PHY_POLL.
 813  *   Otherwise, we enable the interrupts in the PHY.
 814  *   This should only be called with a valid IRQ number.
 815  *   Returns 0 on success or < 0 on error.
 816  */
 817 int phy_start_interrupts(struct phy_device *phydev)
 818 {
 819         atomic_set(&phydev->irq_disable, 0);
 820         if (request_threaded_irq(phydev->irq, NULL, phy_interrupt,
 821                                  IRQF_ONESHOT | IRQF_SHARED,
 822                                  phydev_name(phydev), phydev) < 0) {
 823                 pr_warn("%s: Can't get IRQ %d (PHY)\n",
 824                         phydev->mdio.bus->name, phydev->irq);
 825                 phydev->irq = PHY_POLL;
 826                 return 0;
 827         }
 828
 829         return phy_enable_interrupts(phydev);
 830 }
 831 EXPORT_SYMBOL(phy_start_interrupts);
 832
 833 /**
 834  * phy_stop_interrupts - disable interrupts from a PHY device
 835  * @phydev: target phy_device struct
 836  */
 837 int phy_stop_interrupts(struct phy_device *phydev)
 838 {
 839         int err = phy_disable_interrupts(phydev);
 840
 841         if (err)
 842                 phy_error(phydev);
 843
 844         free_irq(phydev->irq, phydev);
 845
 846         /* If work indeed has been cancelled, disable_irq() will have
 847          * been left unbalanced from phy_interrupt() and enable_irq()
 848          * has to be called so that other devices on the line work.
 849          */
 850         while (atomic_dec_return(&phydev->irq_disable) >= 0)
 851                 enable_irq(phydev->irq);
 852
 853         return err;
 854 }
 855 EXPORT_SYMBOL(phy_stop_interrupts);
 856
 857 /**
 858  * phy_change - Called by the phy_interrupt to handle PHY changes
 859  * @phydev: phy_device struct that interrupted
 860  */
 861 void phy_change(struct phy_device *phydev)
 862 {
 863         if (phy_interrupt_is_valid(phydev)) {
 864                 if (phydev->drv->did_interrupt &&
 865                     !phydev->drv->did_interrupt(phydev))
 866                         goto ignore;
 867
 868                 if (phy_disable_interrupts(phydev))
 869                         goto phy_err;
 870         }
 871
 872         mutex_lock(&phydev->lock);
 873         if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
 874                 phydev->state = PHY_CHANGELINK;
 875         mutex_unlock(&phydev->lock);
 876
 877         if (phy_interrupt_is_valid(phydev)) {
 878                 atomic_dec(&phydev->irq_disable);
 879                 enable_irq(phydev->irq);
 880
 881                 /* Reenable interrupts */
 882                 if (PHY_HALTED != phydev->state &&
 883                     phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED))
 884                         goto irq_enable_err;
 885         }
 886
 887         /* reschedule state queue work to run as soon as possible */
 888         phy_trigger_machine(phydev, true);
 889         return;
 890
 891 ignore:
 892         atomic_dec(&phydev->irq_disable);
 893         enable_irq(phydev->irq);
 894         return;
 895
 896 irq_enable_err:
 897         disable_irq(phydev->irq);
 898         atomic_inc(&phydev->irq_disable);
 899 phy_err:
 900         phy_error(phydev);
 901 }
 902
 903 /**
 904  * phy_change_work - Scheduled by the phy_mac_interrupt to handle PHY changes
 905  * @work: work_struct that describes the work to be done
 906  */
 907 void phy_change_work(struct work_struct *work)
 908 {
 909         struct phy_device *phydev =
 910                 container_of(work, struct phy_device, phy_queue);
 911
 912         phy_change(phydev);
 913 }
 914
 915 /**
 916  * phy_stop - Bring down the PHY link, and stop checking the status
 917  * @phydev: target phy_device struct
 918  */
 919 void phy_stop(struct phy_device *phydev)
 920 {
 921         mutex_lock(&phydev->lock);
 922
 923         if (PHY_HALTED == phydev->state)
 924                 goto out_unlock;
 925
 926         if (phy_interrupt_is_valid(phydev)) {
 927                 /* Disable PHY Interrupts */
 928                 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 929
 930                 /* Clear any pending interrupts */
 931                 phy_clear_interrupt(phydev);
 932         }
 933
 934         phydev->state = PHY_HALTED;
 935
 936 out_unlock:
 937         mutex_unlock(&phydev->lock);
 938
 939         /* Cannot call flush_scheduled_work() here as desired because
 940          * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
 941          * will not reenable interrupts.
 942          */
 943 }
 944 EXPORT_SYMBOL(phy_stop);
 945
 946 /**
 947  * phy_start - start or restart a PHY device
 948  * @phydev: target phy_device struct
 949  *
 950  * Description: Indicates the attached device's readiness to
 951  *   handle PHY-related work.  Used during startup to start the
 952  *   PHY, and after a call to phy_stop() to resume operation.
 953  *   Also used to indicate the MDIO bus has cleared an error
 954  *   condition.
 955  */
 956 void phy_start(struct phy_device *phydev)
 957 {
 958         bool do_resume = false;
 959         int err = 0;
 960
 961         mutex_lock(&phydev->lock);
 962
 963         switch (phydev->state) {
 964         case PHY_STARTING:
 965                 phydev->state = PHY_PENDING;
 966                 break;
 967         case PHY_READY:
 968                 phydev->state = PHY_UP;
 969                 break;
 970         case PHY_HALTED:
 971                 /* make sure interrupts are re-enabled for the PHY */
 972                 if (phydev->irq != PHY_POLL) {
 973                         err = phy_enable_interrupts(phydev);
 974                         if (err < 0)
 975                                 break;
 976                 }
 977
 978                 phydev->state = PHY_RESUMING;
 979                 do_resume = true;
 980                 break;
 981         default:
 982                 break;
 983         }
 984         mutex_unlock(&phydev->lock);
 985
 986         /* if phy was suspended, bring the physical link up again */
 987         if (do_resume)
 988                 phy_resume(phydev);
 989
 990         phy_trigger_machine(phydev, true);
 991 }
 992 EXPORT_SYMBOL(phy_start);
 993
 994 static void phy_adjust_link(struct phy_device *phydev)
 995 {
 996         phydev->adjust_link(phydev->attached_dev);
 997         phy_led_trigger_change_speed(phydev);
 998 }
 999
1000 /**
1001  * phy_state_machine - Handle the state machine
1002  * @work: work_struct that describes the work to be done
1003  */
1004 void phy_state_machine(struct work_struct *work)
1005 {
1006         struct delayed_work *dwork = to_delayed_work(work);
1007         struct phy_device *phydev =
1008                         container_of(dwork, struct phy_device, state_queue);
1009         bool needs_aneg = false, do_suspend = false;
1010         enum phy_state old_state;
1011         int err = 0;
1012         int old_link;
1013
1014         mutex_lock(&phydev->lock);
1015
1016         old_state = phydev->state;
1017
1018         if (phydev->drv && phydev->drv->link_change_notify)
1019                 phydev->drv->link_change_notify(phydev);
1020
1021         switch (phydev->state) {
1022         case PHY_DOWN:
1023         case PHY_STARTING:
1024         case PHY_READY:
1025         case PHY_PENDING:
1026                 break;
1027         case PHY_UP:
1028                 needs_aneg = true;
1029
1030                 phydev->link_timeout = PHY_AN_TIMEOUT;
1031
1032                 break;
1033         case PHY_AN:
1034                 err = phy_read_status(phydev);
1035                 if (err < 0)
1036                         break;
1037
1038                 /* If the link is down, give up on negotiation for now */
1039                 if (!phydev->link) {
1040                         phydev->state = PHY_NOLINK;
1041                         netif_carrier_off(phydev->attached_dev);
1042                         phy_adjust_link(phydev);
1043                         break;
1044                 }
1045
1046                 /* Check if negotiation is done.  Break if there's an error */
1047                 err = phy_aneg_done(phydev);
1048                 if (err < 0)
1049                         break;
1050
1051                 /* If AN is done, we're running */
1052                 if (err > 0) {
1053                         phydev->state = PHY_RUNNING;
1054                         netif_carrier_on(phydev->attached_dev);
1055                         phy_adjust_link(phydev);
1056
1057                 } else if (0 == phydev->link_timeout--)
1058                         needs_aneg = true;
1059                 break;
1060         case PHY_NOLINK:
1061                 if (phy_interrupt_is_valid(phydev))
1062                         break;
1063
1064                 err = phy_read_status(phydev);
1065                 if (err)
1066                         break;
1067
1068                 if (phydev->link) {
1069                         if (AUTONEG_ENABLE == phydev->autoneg) {
1070                                 err = phy_aneg_done(phydev);
1071                                 if (err < 0)
1072                                         break;
1073
1074                                 if (!err) {
1075                                         phydev->state = PHY_AN;
1076                                         phydev->link_timeout = PHY_AN_TIMEOUT;
1077                                         break;
1078                                 }
1079                         }
1080                         phydev->state = PHY_RUNNING;
1081                         netif_carrier_on(phydev->attached_dev);
1082                         phy_adjust_link(phydev);
1083                 }
1084                 break;
1085         case PHY_FORCING:
1086                 err = genphy_update_link(phydev);
1087                 if (err)
1088                         break;
1089
1090                 if (phydev->link) {
1091                         phydev->state = PHY_RUNNING;
1092                         netif_carrier_on(phydev->attached_dev);
1093                 } else {
1094                         if (0 == phydev->link_timeout--)
1095                                 needs_aneg = true;
1096                 }
1097
1098                 phy_adjust_link(phydev);
1099                 break;
1100         case PHY_RUNNING:
1101                 /* Only register a CHANGE if we are polling and link changed
1102                  * since latest checking.
1103                  */
1104                 if (phydev->irq == PHY_POLL) {
1105                         old_link = phydev->link;
1106                         err = phy_read_status(phydev);
1107                         if (err)
1108                                 break;
1109
1110                         if (old_link != phydev->link)
1111                                 phydev->state = PHY_CHANGELINK;
1112                 }
1113                 /*
1114                  * Failsafe: check that nobody set phydev->link=0 between two
1115                  * poll cycles, otherwise we won't leave RUNNING state as long
1116                  * as link remains down.
1117                  */
1118                 if (!phydev->link && phydev->state == PHY_RUNNING) {
1119                         phydev->state = PHY_CHANGELINK;
1120                         phydev_err(phydev, "no link in PHY_RUNNING\n");
1121                 }
1122                 break;
1123         case PHY_CHANGELINK:
1124                 err = phy_read_status(phydev);
1125                 if (err)
1126                         break;
1127
1128                 if (phydev->link) {
1129                         phydev->state = PHY_RUNNING;
1130                         netif_carrier_on(phydev->attached_dev);
1131                 } else {
1132                         phydev->state = PHY_NOLINK;
1133                         netif_carrier_off(phydev->attached_dev);
1134                 }
1135
1136                 phy_adjust_link(phydev);
1137
1138                 if (phy_interrupt_is_valid(phydev))
1139                         err = phy_config_interrupt(phydev,
1140                                                    PHY_INTERRUPT_ENABLED);
1141                 break;
1142         case PHY_HALTED:
1143                 if (phydev->link) {
1144                         phydev->link = 0;
1145                         netif_carrier_off(phydev->attached_dev);
1146                         phy_adjust_link(phydev);
1147                         do_suspend = true;
1148                 }
1149                 break;
1150         case PHY_RESUMING:
1151                 if (AUTONEG_ENABLE == phydev->autoneg) {
1152                         err = phy_aneg_done(phydev);
1153                         if (err < 0)
1154                                 break;
1155
1156                         /* err > 0 if AN is done.
1157                          * Otherwise, it's 0, and we're  still waiting for AN
1158                          */
1159                         if (err > 0) {
1160                                 err = phy_read_status(phydev);
1161                                 if (err)
1162                                         break;
1163
1164                                 if (phydev->link) {
1165                                         phydev->state = PHY_RUNNING;
1166                                         netif_carrier_on(phydev->attached_dev);
1167                                 } else  {
1168                                         phydev->state = PHY_NOLINK;
1169                                 }
1170                                 phy_adjust_link(phydev);
1171                         } else {
1172                                 phydev->state = PHY_AN;
1173                                 phydev->link_timeout = PHY_AN_TIMEOUT;
1174                         }
1175                 } else {
1176                         err = phy_read_status(phydev);
1177                         if (err)
1178                                 break;
1179
1180                         if (phydev->link) {
1181                                 phydev->state = PHY_RUNNING;
1182                                 netif_carrier_on(phydev->attached_dev);
1183                         } else  {
1184                                 phydev->state = PHY_NOLINK;
1185                         }
1186                         phy_adjust_link(phydev);
1187                 }
1188                 break;
1189         }
1190
1191         mutex_unlock(&phydev->lock);
1192
1193         if (needs_aneg)
1194                 err = phy_start_aneg(phydev);
1195         else if (do_suspend)
1196                 phy_suspend(phydev);
1197
1198         if (err < 0)
1199                 phy_error(phydev);
1200
1201         phydev_dbg(phydev, "PHY state change %s -> %s\n",
1202                    phy_state_to_str(old_state),
1203                    phy_state_to_str(phydev->state));
1204
1205         /* Only re-schedule a PHY state machine change if we are polling the
1206          * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
1207          * between states from phy_mac_interrupt()
1208          */
1209         if (phydev->irq == PHY_POLL)
1210                 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
1211                                    PHY_STATE_TIME * HZ);
1212 }
1213
1214 /**
1215  * phy_mac_interrupt - MAC says the link has changed
1216  * @phydev: phy_device struct with changed link
1217  * @new_link: Link is Up/Down.
1218  *
1219  * Description: The MAC layer is able indicate there has been a change
1220  *   in the PHY link status. Set the new link status, and trigger the
1221  *   state machine, work a work queue.
1222  */
1223 void phy_mac_interrupt(struct phy_device *phydev, int new_link)
1224 {
1225         phydev->link = new_link;
1226
1227         /* Trigger a state machine change */
1228         queue_work(system_power_efficient_wq, &phydev->phy_queue);
1229 }
1230 EXPORT_SYMBOL(phy_mac_interrupt);
1231
1232 /**
1233  * phy_init_eee - init and check the EEE feature
1234  * @phydev: target phy_device struct
1235  * @clk_stop_enable: PHY may stop the clock during LPI
1236  *
1237  * Description: it checks if the Energy-Efficient Ethernet (EEE)
1238  * is supported by looking at the MMD registers 3.20 and 7.60/61
1239  * and it programs the MMD register 3.0 setting the "Clock stop enable"
1240  * bit if required.
1241  */
1242 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1243 {
1244         if (!phydev->drv)
1245                 return -EIO;
1246
1247         /* According to 802.3az,the EEE is supported only in full duplex-mode.
1248          */
1249         if (phydev->duplex == DUPLEX_FULL) {
1250                 int eee_lp, eee_cap, eee_adv;
1251                 u32 lp, cap, adv;
1252                 int status;
1253
1254                 /* Read phy status to properly get the right settings */
1255                 status = phy_read_status(phydev);
1256                 if (status)
1257                         return status;
1258
1259                 /* First check if the EEE ability is supported */
1260                 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1261                 if (eee_cap <= 0)
1262                         goto eee_exit_err;
1263
1264                 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1265                 if (!cap)
1266                         goto eee_exit_err;
1267
1268                 /* Check which link settings negotiated and verify it in
1269                  * the EEE advertising registers.
1270                  */
1271                 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1272                 if (eee_lp <= 0)
1273                         goto eee_exit_err;
1274
1275                 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1276                 if (eee_adv <= 0)
1277                         goto eee_exit_err;
1278
1279                 adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
1280                 lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
1281                 if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv))
1282                         goto eee_exit_err;
1283
1284                 if (clk_stop_enable) {
1285                         /* Configure the PHY to stop receiving xMII
1286                          * clock while it is signaling LPI.
1287                          */
1288                         int val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
1289                         if (val < 0)
1290                                 return val;
1291
1292                         val |= MDIO_PCS_CTRL1_CLKSTOP_EN;
1293                         phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, val);
1294                 }
1295
1296                 return 0; /* EEE supported */
1297         }
1298 eee_exit_err:
1299         return -EPROTONOSUPPORT;
1300 }
1301 EXPORT_SYMBOL(phy_init_eee);
1302
1303 /**
1304  * phy_get_eee_err - report the EEE wake error count
1305  * @phydev: target phy_device struct
1306  *
1307  * Description: it is to report the number of time where the PHY
1308  * failed to complete its normal wake sequence.
1309  */
1310 int phy_get_eee_err(struct phy_device *phydev)
1311 {
1312         if (!phydev->drv)
1313                 return -EIO;
1314
1315         return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1316 }
1317 EXPORT_SYMBOL(phy_get_eee_err);
1318
1319 /**
1320  * phy_ethtool_get_eee - get EEE supported and status
1321  * @phydev: target phy_device struct
1322  * @data: ethtool_eee data
1323  *
1324  * Description: it reportes the Supported/Advertisement/LP Advertisement
1325  * capabilities.
1326  */
1327 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1328 {
1329         int val;
1330
1331         if (!phydev->drv)
1332                 return -EIO;
1333
1334         /* Get Supported EEE */
1335         val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1336         if (val < 0)
1337                 return val;
1338         data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1339
1340         /* Get advertisement EEE */
1341         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1342         if (val < 0)
1343                 return val;
1344         data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1345
1346         /* Get LP advertisement EEE */
1347         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1348         if (val < 0)
1349                 return val;
1350         data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1351
1352         return 0;
1353 }
1354 EXPORT_SYMBOL(phy_ethtool_get_eee);
1355
1356 /**
1357  * phy_ethtool_set_eee - set EEE supported and status
1358  * @phydev: target phy_device struct
1359  * @data: ethtool_eee data
1360  *
1361  * Description: it is to program the Advertisement EEE register.
1362  */
1363 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1364 {
1365         int cap, old_adv, adv, ret;
1366
1367         if (!phydev->drv)
1368                 return -EIO;
1369
1370         /* Get Supported EEE */
1371         cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1372         if (cap < 0)
1373                 return cap;
1374
1375         old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1376         if (old_adv < 0)
1377                 return old_adv;
1378
1379         adv = ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1380
1381         /* Mask prohibited EEE modes */
1382         adv &= ~phydev->eee_broken_modes;
1383
1384         if (old_adv != adv) {
1385                 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1386                 if (ret < 0)
1387                         return ret;
1388
1389                 /* Restart autonegotiation so the new modes get sent to the
1390                  * link partner.
1391                  */
1392                 ret = genphy_restart_aneg(phydev);
1393                 if (ret < 0)
1394                         return ret;
1395         }
1396
1397         return 0;
1398 }
1399 EXPORT_SYMBOL(phy_ethtool_set_eee);
1400
1401 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1402 {
1403         if (phydev->drv && phydev->drv->set_wol)
1404                 return phydev->drv->set_wol(phydev, wol);
1405
1406         return -EOPNOTSUPP;
1407 }
1408 EXPORT_SYMBOL(phy_ethtool_set_wol);
1409
1410 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1411 {
1412         if (phydev->drv && phydev->drv->get_wol)
1413                 phydev->drv->get_wol(phydev, wol);
1414 }
1415 EXPORT_SYMBOL(phy_ethtool_get_wol);
1416
1417 int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1418                                    struct ethtool_link_ksettings *cmd)
1419 {
1420         struct phy_device *phydev = ndev->phydev;
1421
1422         if (!phydev)
1423                 return -ENODEV;
1424
1425         return phy_ethtool_ksettings_get(phydev, cmd);
1426 }
1427 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1428
1429 int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1430                                    const struct ethtool_link_ksettings *cmd)
1431 {
1432         struct phy_device *phydev = ndev->phydev;
1433
1434         if (!phydev)
1435                 return -ENODEV;
1436
1437         return phy_ethtool_ksettings_set(phydev, cmd);
1438 }
1439 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1440
1441 int phy_ethtool_nway_reset(struct net_device *ndev)
1442 {
1443         struct phy_device *phydev = ndev->phydev;
1444
1445         if (!phydev)
1446                 return -ENODEV;
1447
1448         if (!phydev->drv)
1449                 return -EIO;
1450
1451         return genphy_restart_aneg(phydev);
1452 }
1453 EXPORT_SYMBOL(phy_ethtool_nway_reset);