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_14000:
  58                 return "14Gbps";
  59         case SPEED_20000:
  60                 return "20Gbps";
  61         case SPEED_25000:
  62                 return "25Gbps";
  63         case SPEED_40000:
  64                 return "40Gbps";
  65         case SPEED_50000:
  66                 return "50Gbps";
  67         case SPEED_56000:
  68                 return "56Gbps";
  69         case SPEED_100000:
  70                 return "100Gbps";
  71         case SPEED_UNKNOWN:
  72                 return "Unknown";
  73         default:
  74                 return "Unsupported (update phy.c)";
  75         }
  76 }
  77
  78 #define PHY_STATE_STR(_state)                   \
  79         case PHY_##_state:                      \
  80                 return __stringify(_state);     \
  81
  82 static const char *phy_state_to_str(enum phy_state st)
  83 {
  84         switch (st) {
  85         PHY_STATE_STR(DOWN)
  86         PHY_STATE_STR(STARTING)
  87         PHY_STATE_STR(READY)
  88         PHY_STATE_STR(PENDING)
  89         PHY_STATE_STR(UP)
  90         PHY_STATE_STR(AN)
  91         PHY_STATE_STR(RUNNING)
  92         PHY_STATE_STR(NOLINK)
  93         PHY_STATE_STR(FORCING)
  94         PHY_STATE_STR(CHANGELINK)
  95         PHY_STATE_STR(HALTED)
  96         PHY_STATE_STR(RESUMING)
  97         }
  98
  99         return NULL;
 100 }
 101
 102
 103 /**
 104  * phy_print_status - Convenience function to print out the current phy status
 105  * @phydev: the phy_device struct
 106  */
 107 void phy_print_status(struct phy_device *phydev)
 108 {
 109         if (phydev->link) {
 110                 netdev_info(phydev->attached_dev,
 111                         "Link is Up - %s/%s - flow control %s\n",
 112                         phy_speed_to_str(phydev->speed),
 113                         DUPLEX_FULL == phydev->duplex ? "Full" : "Half",
 114                         phydev->pause ? "rx/tx" : "off");
 115         } else  {
 116                 netdev_info(phydev->attached_dev, "Link is Down\n");
 117         }
 118 }
 119 EXPORT_SYMBOL(phy_print_status);
 120
 121 /**
 122  * phy_clear_interrupt - Ack the phy device's interrupt
 123  * @phydev: the phy_device struct
 124  *
 125  * If the @phydev driver has an ack_interrupt function, call it to
 126  * ack and clear the phy device's interrupt.
 127  *
 128  * Returns 0 on success or < 0 on error.
 129  */
 130 static int phy_clear_interrupt(struct phy_device *phydev)
 131 {
 132         if (phydev->drv->ack_interrupt)
 133                 return phydev->drv->ack_interrupt(phydev);
 134
 135         return 0;
 136 }
 137
 138 /**
 139  * phy_config_interrupt - configure the PHY device for the requested interrupts
 140  * @phydev: the phy_device struct
 141  * @interrupts: interrupt flags to configure for this @phydev
 142  *
 143  * Returns 0 on success or < 0 on error.
 144  */
 145 static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
 146 {
 147         phydev->interrupts = interrupts;
 148         if (phydev->drv->config_intr)
 149                 return phydev->drv->config_intr(phydev);
 150
 151         return 0;
 152 }
 153
 154
 155 /**
 156  * phy_aneg_done - return auto-negotiation status
 157  * @phydev: target phy_device struct
 158  *
 159  * Description: Return the auto-negotiation status from this @phydev
 160  * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
 161  * is still pending.
 162  */
 163 int phy_aneg_done(struct phy_device *phydev)
 164 {
 165         if (phydev->drv && phydev->drv->aneg_done)
 166                 return phydev->drv->aneg_done(phydev);
 167
 168         return genphy_aneg_done(phydev);
 169 }
 170 EXPORT_SYMBOL(phy_aneg_done);
 171
 172 /* A structure for mapping a particular speed and duplex
 173  * combination to a particular SUPPORTED and ADVERTISED value
 174  */
 175 struct phy_setting {
 176         int speed;
 177         int duplex;
 178         u32 setting;
 179 };
 180
 181 /* A mapping of all SUPPORTED settings to speed/duplex.  This table
 182  * must be grouped by speed and sorted in descending match priority
 183  * - iow, descending speed. */
 184 static const struct phy_setting settings[] = {
 185         {
 186                 .speed = SPEED_10000,
 187                 .duplex = DUPLEX_FULL,
 188                 .setting = SUPPORTED_10000baseKR_Full,
 189         },
 190         {
 191                 .speed = SPEED_10000,
 192                 .duplex = DUPLEX_FULL,
 193                 .setting = SUPPORTED_10000baseKX4_Full,
 194         },
 195         {
 196                 .speed = SPEED_10000,
 197                 .duplex = DUPLEX_FULL,
 198                 .setting = SUPPORTED_10000baseT_Full,
 199         },
 200         {
 201                 .speed = SPEED_2500,
 202                 .duplex = DUPLEX_FULL,
 203                 .setting = SUPPORTED_2500baseX_Full,
 204         },
 205         {
 206                 .speed = SPEED_1000,
 207                 .duplex = DUPLEX_FULL,
 208                 .setting = SUPPORTED_1000baseKX_Full,
 209         },
 210         {
 211                 .speed = SPEED_1000,
 212                 .duplex = DUPLEX_FULL,
 213                 .setting = SUPPORTED_1000baseT_Full,
 214         },
 215         {
 216                 .speed = SPEED_1000,
 217                 .duplex = DUPLEX_HALF,
 218                 .setting = SUPPORTED_1000baseT_Half,
 219         },
 220         {
 221                 .speed = SPEED_100,
 222                 .duplex = DUPLEX_FULL,
 223                 .setting = SUPPORTED_100baseT_Full,
 224         },
 225         {
 226                 .speed = SPEED_100,
 227                 .duplex = DUPLEX_HALF,
 228                 .setting = SUPPORTED_100baseT_Half,
 229         },
 230         {
 231                 .speed = SPEED_10,
 232                 .duplex = DUPLEX_FULL,
 233                 .setting = SUPPORTED_10baseT_Full,
 234         },
 235         {
 236                 .speed = SPEED_10,
 237                 .duplex = DUPLEX_HALF,
 238                 .setting = SUPPORTED_10baseT_Half,
 239         },
 240 };
 241
 242 /**
 243  * phy_lookup_setting - lookup a PHY setting
 244  * @speed: speed to match
 245  * @duplex: duplex to match
 246  * @features: allowed link modes
 247  * @exact: an exact match is required
 248  *
 249  * Search the settings array for a setting that matches the speed and
 250  * duplex, and which is supported.
 251  *
 252  * If @exact is unset, either an exact match or %NULL for no match will
 253  * be returned.
 254  *
 255  * If @exact is set, an exact match, the fastest supported setting at
 256  * or below the specified speed, the slowest supported setting, or if
 257  * they all fail, %NULL will be returned.
 258  */
 259 static const struct phy_setting *
 260 phy_lookup_setting(int speed, int duplex, u32 features, bool exact)
 261 {
 262         const struct phy_setting *p, *match = NULL, *last = NULL;
 263         int i;
 264
 265         for (i = 0, p = settings; i < ARRAY_SIZE(settings); i++, p++) {
 266                 if (p->setting & features) {
 267                         last = p;
 268                         if (p->speed == speed && p->duplex == duplex) {
 269                                 /* Exact match for speed and duplex */
 270                                 match = p;
 271                                 break;
 272                         } else if (!exact) {
 273                                 if (!match && p->speed <= speed)
 274                                         /* Candidate */
 275                                         match = p;
 276
 277                                 if (p->speed < speed)
 278                                         break;
 279                         }
 280                 }
 281         }
 282
 283         if (!match && !exact)
 284                 match = last;
 285
 286         return match;
 287 }
 288
 289 /**
 290  * phy_find_valid - find a PHY setting that matches the requested parameters
 291  * @speed: desired speed
 292  * @duplex: desired duplex
 293  * @supported: mask of supported link modes
 294  *
 295  * Locate a supported phy setting that is, in priority order:
 296  * - an exact match for the specified speed and duplex mode
 297  * - a match for the specified speed, or slower speed
 298  * - the slowest supported speed
 299  * Returns the matched phy_setting entry, or %NULL if no supported phy
 300  * settings were found.
 301  */
 302 static const struct phy_setting *
 303 phy_find_valid(int speed, int duplex, u32 supported)
 304 {
 305         return phy_lookup_setting(speed, duplex, supported, false);
 306 }
 307
 308 /**
 309  * phy_supported_speeds - return all speeds currently supported by a phy device
 310  * @phy: The phy device to return supported speeds of.
 311  * @speeds: buffer to store supported speeds in.
 312  * @size:   size of speeds buffer.
 313  *
 314  * Description: Returns the number of supported speeds, and fills the speeds
 315  * buffer with the supported speeds. If speeds buffer is too small to contain
 316  * all currently supported speeds, will return as many speeds as can fit.
 317  */
 318 unsigned int phy_supported_speeds(struct phy_device *phy,
 319                                   unsigned int *speeds,
 320                                   unsigned int size)
 321 {
 322         unsigned int count = 0;
 323         unsigned int idx = 0;
 324
 325         for (idx = 0; idx < ARRAY_SIZE(settings) && count < size; idx++)
 326                 /* Assumes settings are grouped by speed */
 327                 if ((settings[idx].setting & phy->supported) &&
 328                     (count == 0 || speeds[count - 1] != settings[idx].speed))
 329                         speeds[count++] = settings[idx].speed;
 330
 331         return count;
 332 }
 333
 334 /**
 335  * phy_check_valid - check if there is a valid PHY setting which matches
 336  *                   speed, duplex, and feature mask
 337  * @speed: speed to match
 338  * @duplex: duplex to match
 339  * @features: A mask of the valid settings
 340  *
 341  * Description: Returns true if there is a valid setting, false otherwise.
 342  */
 343 static inline bool phy_check_valid(int speed, int duplex, u32 features)
 344 {
 345         return !!phy_lookup_setting(speed, duplex, features, true);
 346 }
 347
 348 /**
 349  * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
 350  * @phydev: the target phy_device struct
 351  *
 352  * Description: Make sure the PHY is set to supported speeds and
 353  *   duplexes.  Drop down by one in this order:  1000/FULL,
 354  *   1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
 355  */
 356 static void phy_sanitize_settings(struct phy_device *phydev)
 357 {
 358         const struct phy_setting *setting;
 359         u32 features = phydev->supported;
 360
 361         /* Sanitize settings based on PHY capabilities */
 362         if ((features & SUPPORTED_Autoneg) == 0)
 363                 phydev->autoneg = AUTONEG_DISABLE;
 364
 365         setting = phy_find_valid(phydev->speed, phydev->duplex, features);
 366         if (setting) {
 367                 phydev->speed = setting->speed;
 368                 phydev->duplex = setting->duplex;
 369         } else {
 370                 /* We failed to find anything (no supported speeds?) */
 371                 phydev->speed = SPEED_UNKNOWN;
 372                 phydev->duplex = DUPLEX_UNKNOWN;
 373         }
 374 }
 375
 376 /**
 377  * phy_ethtool_sset - generic ethtool sset function, handles all the details
 378  * @phydev: target phy_device struct
 379  * @cmd: ethtool_cmd
 380  *
 381  * A few notes about parameter checking:
 382  * - We don't set port or transceiver, so we don't care what they
 383  *   were set to.
 384  * - phy_start_aneg() will make sure forced settings are sane, and
 385  *   choose the next best ones from the ones selected, so we don't
 386  *   care if ethtool tries to give us bad values.
 387  */
 388 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
 389 {
 390         u32 speed = ethtool_cmd_speed(cmd);
 391
 392         if (cmd->phy_address != phydev->mdio.addr)
 393                 return -EINVAL;
 394
 395         /* We make sure that we don't pass unsupported values in to the PHY */
 396         cmd->advertising &= phydev->supported;
 397
 398         /* Verify the settings we care about. */
 399         if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
 400                 return -EINVAL;
 401
 402         if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
 403                 return -EINVAL;
 404
 405         if (cmd->autoneg == AUTONEG_DISABLE &&
 406             ((speed != SPEED_1000 &&
 407               speed != SPEED_100 &&
 408               speed != SPEED_10) ||
 409              (cmd->duplex != DUPLEX_HALF &&
 410               cmd->duplex != DUPLEX_FULL)))
 411                 return -EINVAL;
 412
 413         phydev->autoneg = cmd->autoneg;
 414
 415         phydev->speed = speed;
 416
 417         phydev->advertising = cmd->advertising;
 418
 419         if (AUTONEG_ENABLE == cmd->autoneg)
 420                 phydev->advertising |= ADVERTISED_Autoneg;
 421         else
 422                 phydev->advertising &= ~ADVERTISED_Autoneg;
 423
 424         phydev->duplex = cmd->duplex;
 425
 426         phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl;
 427
 428         /* Restart the PHY */
 429         phy_start_aneg(phydev);
 430
 431         return 0;
 432 }
 433 EXPORT_SYMBOL(phy_ethtool_sset);
 434
 435 int phy_ethtool_ksettings_set(struct phy_device *phydev,
 436                               const struct ethtool_link_ksettings *cmd)
 437 {
 438         u8 autoneg = cmd->base.autoneg;
 439         u8 duplex = cmd->base.duplex;
 440         u32 speed = cmd->base.speed;
 441         u32 advertising;
 442
 443         if (cmd->base.phy_address != phydev->mdio.addr)
 444                 return -EINVAL;
 445
 446         ethtool_convert_link_mode_to_legacy_u32(&advertising,
 447                                                 cmd->link_modes.advertising);
 448
 449         /* We make sure that we don't pass unsupported values in to the PHY */
 450         advertising &= phydev->supported;
 451
 452         /* Verify the settings we care about. */
 453         if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
 454                 return -EINVAL;
 455
 456         if (autoneg == AUTONEG_ENABLE && advertising == 0)
 457                 return -EINVAL;
 458
 459         if (autoneg == AUTONEG_DISABLE &&
 460             ((speed != SPEED_1000 &&
 461               speed != SPEED_100 &&
 462               speed != SPEED_10) ||
 463              (duplex != DUPLEX_HALF &&
 464               duplex != DUPLEX_FULL)))
 465                 return -EINVAL;
 466
 467         phydev->autoneg = autoneg;
 468
 469         phydev->speed = speed;
 470
 471         phydev->advertising = advertising;
 472
 473         if (autoneg == AUTONEG_ENABLE)
 474                 phydev->advertising |= ADVERTISED_Autoneg;
 475         else
 476                 phydev->advertising &= ~ADVERTISED_Autoneg;
 477
 478         phydev->duplex = duplex;
 479
 480         phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
 481
 482         /* Restart the PHY */
 483         phy_start_aneg(phydev);
 484
 485         return 0;
 486 }
 487 EXPORT_SYMBOL(phy_ethtool_ksettings_set);
 488
 489 int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
 490 {
 491         cmd->supported = phydev->supported;
 492
 493         cmd->advertising = phydev->advertising;
 494         cmd->lp_advertising = phydev->lp_advertising;
 495
 496         ethtool_cmd_speed_set(cmd, phydev->speed);
 497         cmd->duplex = phydev->duplex;
 498         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 499                 cmd->port = PORT_BNC;
 500         else
 501                 cmd->port = PORT_MII;
 502         cmd->phy_address = phydev->mdio.addr;
 503         cmd->transceiver = phy_is_internal(phydev) ?
 504                 XCVR_INTERNAL : XCVR_EXTERNAL;
 505         cmd->autoneg = phydev->autoneg;
 506         cmd->eth_tp_mdix_ctrl = phydev->mdix_ctrl;
 507         cmd->eth_tp_mdix = phydev->mdix;
 508
 509         return 0;
 510 }
 511 EXPORT_SYMBOL(phy_ethtool_gset);
 512
 513 int phy_ethtool_ksettings_get(struct phy_device *phydev,
 514                               struct ethtool_link_ksettings *cmd)
 515 {
 516         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
 517                                                 phydev->supported);
 518
 519         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
 520                                                 phydev->advertising);
 521
 522         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
 523                                                 phydev->lp_advertising);
 524
 525         cmd->base.speed = phydev->speed;
 526         cmd->base.duplex = phydev->duplex;
 527         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 528                 cmd->base.port = PORT_BNC;
 529         else
 530                 cmd->base.port = PORT_MII;
 531
 532         cmd->base.phy_address = phydev->mdio.addr;
 533         cmd->base.autoneg = phydev->autoneg;
 534         cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
 535         cmd->base.eth_tp_mdix = phydev->mdix;
 536
 537         return 0;
 538 }
 539 EXPORT_SYMBOL(phy_ethtool_ksettings_get);
 540
 541 /**
 542  * phy_mii_ioctl - generic PHY MII ioctl interface
 543  * @phydev: the phy_device struct
 544  * @ifr: &struct ifreq for socket ioctl's
 545  * @cmd: ioctl cmd to execute
 546  *
 547  * Note that this function is currently incompatible with the
 548  * PHYCONTROL layer.  It changes registers without regard to
 549  * current state.  Use at own risk.
 550  */
 551 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
 552 {
 553         struct mii_ioctl_data *mii_data = if_mii(ifr);
 554         u16 val = mii_data->val_in;
 555         bool change_autoneg = false;
 556
 557         switch (cmd) {
 558         case SIOCGMIIPHY:
 559                 mii_data->phy_id = phydev->mdio.addr;
 560                 /* fall through */
 561
 562         case SIOCGMIIREG:
 563                 mii_data->val_out = mdiobus_read(phydev->mdio.bus,
 564                                                  mii_data->phy_id,
 565                                                  mii_data->reg_num);
 566                 return 0;
 567
 568         case SIOCSMIIREG:
 569                 if (mii_data->phy_id == phydev->mdio.addr) {
 570                         switch (mii_data->reg_num) {
 571                         case MII_BMCR:
 572                                 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
 573                                         if (phydev->autoneg == AUTONEG_ENABLE)
 574                                                 change_autoneg = true;
 575                                         phydev->autoneg = AUTONEG_DISABLE;
 576                                         if (val & BMCR_FULLDPLX)
 577                                                 phydev->duplex = DUPLEX_FULL;
 578                                         else
 579                                                 phydev->duplex = DUPLEX_HALF;
 580                                         if (val & BMCR_SPEED1000)
 581                                                 phydev->speed = SPEED_1000;
 582                                         else if (val & BMCR_SPEED100)
 583                                                 phydev->speed = SPEED_100;
 584                                         else phydev->speed = SPEED_10;
 585                                 }
 586                                 else {
 587                                         if (phydev->autoneg == AUTONEG_DISABLE)
 588                                                 change_autoneg = true;
 589                                         phydev->autoneg = AUTONEG_ENABLE;
 590                                 }
 591                                 break;
 592                         case MII_ADVERTISE:
 593                                 phydev->advertising = mii_adv_to_ethtool_adv_t(val);
 594                                 change_autoneg = true;
 595                                 break;
 596                         default:
 597                                 /* do nothing */
 598                                 break;
 599                         }
 600                 }
 601
 602                 mdiobus_write(phydev->mdio.bus, mii_data->phy_id,
 603                               mii_data->reg_num, val);
 604
 605                 if (mii_data->phy_id == phydev->mdio.addr &&
 606                     mii_data->reg_num == MII_BMCR &&
 607                     val & BMCR_RESET)
 608                         return phy_init_hw(phydev);
 609
 610                 if (change_autoneg)
 611                         return phy_start_aneg(phydev);
 612
 613                 return 0;
 614
 615         case SIOCSHWTSTAMP:
 616                 if (phydev->drv && phydev->drv->hwtstamp)
 617                         return phydev->drv->hwtstamp(phydev, ifr);
 618                 /* fall through */
 619
 620         default:
 621                 return -EOPNOTSUPP;
 622         }
 623 }
 624 EXPORT_SYMBOL(phy_mii_ioctl);
 625
 626 /**
 627  * phy_start_aneg_priv - start auto-negotiation for this PHY device
 628  * @phydev: the phy_device struct
 629  * @sync: indicate whether we should wait for the workqueue cancelation
 630  *
 631  * Description: Sanitizes the settings (if we're not autonegotiating
 632  *   them), and then calls the driver's config_aneg function.
 633  *   If the PHYCONTROL Layer is operating, we change the state to
 634  *   reflect the beginning of Auto-negotiation or forcing.
 635  */
 636 static int phy_start_aneg_priv(struct phy_device *phydev, bool sync)
 637 {
 638         bool trigger = 0;
 639         int err;
 640
 641         if (!phydev->drv)
 642                 return -EIO;
 643
 644         mutex_lock(&phydev->lock);
 645
 646         if (AUTONEG_DISABLE == phydev->autoneg)
 647                 phy_sanitize_settings(phydev);
 648
 649         /* Invalidate LP advertising flags */
 650         phydev->lp_advertising = 0;
 651
 652         err = phydev->drv->config_aneg(phydev);
 653         if (err < 0)
 654                 goto out_unlock;
 655
 656         if (phydev->state != PHY_HALTED) {
 657                 if (AUTONEG_ENABLE == phydev->autoneg) {
 658                         phydev->state = PHY_AN;
 659                         phydev->link_timeout = PHY_AN_TIMEOUT;
 660                 } else {
 661                         phydev->state = PHY_FORCING;
 662                         phydev->link_timeout = PHY_FORCE_TIMEOUT;
 663                 }
 664         }
 665
 666         /* Re-schedule a PHY state machine to check PHY status because
 667          * negotiation may already be done and aneg interrupt may not be
 668          * generated.
 669          */
 670         if (phy_interrupt_is_valid(phydev) && (phydev->state == PHY_AN)) {
 671                 err = phy_aneg_done(phydev);
 672                 if (err > 0) {
 673                         trigger = true;
 674                         err = 0;
 675                 }
 676         }
 677
 678 out_unlock:
 679         mutex_unlock(&phydev->lock);
 680
 681         if (trigger)
 682                 phy_trigger_machine(phydev, sync);
 683
 684         return err;
 685 }
 686
 687 /**
 688  * phy_start_aneg - start auto-negotiation for this PHY device
 689  * @phydev: the phy_device struct
 690  *
 691  * Description: Sanitizes the settings (if we're not autonegotiating
 692  *   them), and then calls the driver's config_aneg function.
 693  *   If the PHYCONTROL Layer is operating, we change the state to
 694  *   reflect the beginning of Auto-negotiation or forcing.
 695  */
 696 int phy_start_aneg(struct phy_device *phydev)
 697 {
 698         return phy_start_aneg_priv(phydev, true);
 699 }
 700 EXPORT_SYMBOL(phy_start_aneg);
 701
 702 /**
 703  * phy_start_machine - start PHY state machine tracking
 704  * @phydev: the phy_device struct
 705  *
 706  * Description: The PHY infrastructure can run a state machine
 707  *   which tracks whether the PHY is starting up, negotiating,
 708  *   etc.  This function starts the timer which tracks the state
 709  *   of the PHY.  If you want to maintain your own state machine,
 710  *   do not call this function.
 711  */
 712 void phy_start_machine(struct phy_device *phydev)
 713 {
 714         queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
 715 }
 716
 717 /**
 718  * phy_trigger_machine - trigger the state machine to run
 719  *
 720  * @phydev: the phy_device struct
 721  * @sync: indicate whether we should wait for the workqueue cancelation
 722  *
 723  * Description: There has been a change in state which requires that the
 724  *   state machine runs.
 725  */
 726
 727 void phy_trigger_machine(struct phy_device *phydev, bool sync)
 728 {
 729         if (sync)
 730                 cancel_delayed_work_sync(&phydev->state_queue);
 731         else
 732                 cancel_delayed_work(&phydev->state_queue);
 733         queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
 734 }
 735
 736 /**
 737  * phy_stop_machine - stop the PHY state machine tracking
 738  * @phydev: target phy_device struct
 739  *
 740  * Description: Stops the state machine timer, sets the state to UP
 741  *   (unless it wasn't up yet). This function must be called BEFORE
 742  *   phy_detach.
 743  */
 744 void phy_stop_machine(struct phy_device *phydev)
 745 {
 746         cancel_delayed_work_sync(&phydev->state_queue);
 747
 748         mutex_lock(&phydev->lock);
 749         if (phydev->state > PHY_UP && phydev->state != PHY_HALTED)
 750                 phydev->state = PHY_UP;
 751         mutex_unlock(&phydev->lock);
 752 }
 753
 754 /**
 755  * phy_error - enter HALTED state for this PHY device
 756  * @phydev: target phy_device struct
 757  *
 758  * Moves the PHY to the HALTED state in response to a read
 759  * or write error, and tells the controller the link is down.
 760  * Must not be called from interrupt context, or while the
 761  * phydev->lock is held.
 762  */
 763 static void phy_error(struct phy_device *phydev)
 764 {
 765         mutex_lock(&phydev->lock);
 766         phydev->state = PHY_HALTED;
 767         mutex_unlock(&phydev->lock);
 768
 769         phy_trigger_machine(phydev, false);
 770 }
 771
 772 /**
 773  * phy_interrupt - PHY interrupt handler
 774  * @irq: interrupt line
 775  * @phy_dat: phy_device pointer
 776  *
 777  * Description: When a PHY interrupt occurs, the handler disables
 778  * interrupts, and uses phy_change to handle the interrupt.
 779  */
 780 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
 781 {
 782         struct phy_device *phydev = phy_dat;
 783
 784         if (PHY_HALTED == phydev->state)
 785                 return IRQ_NONE;                /* It can't be ours.  */
 786
 787         disable_irq_nosync(irq);
 788         atomic_inc(&phydev->irq_disable);
 789
 790         phy_change(phydev);
 791
 792         return IRQ_HANDLED;
 793 }
 794
 795 /**
 796  * phy_enable_interrupts - Enable the interrupts from the PHY side
 797  * @phydev: target phy_device struct
 798  */
 799 static int phy_enable_interrupts(struct phy_device *phydev)
 800 {
 801         int err = phy_clear_interrupt(phydev);
 802
 803         if (err < 0)
 804                 return err;
 805
 806         return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
 807 }
 808
 809 /**
 810  * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
 811  * @phydev: target phy_device struct
 812  */
 813 static int phy_disable_interrupts(struct phy_device *phydev)
 814 {
 815         int err;
 816
 817         /* Disable PHY interrupts */
 818         err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 819         if (err)
 820                 goto phy_err;
 821
 822         /* Clear the interrupt */
 823         err = phy_clear_interrupt(phydev);
 824         if (err)
 825                 goto phy_err;
 826
 827         return 0;
 828
 829 phy_err:
 830         phy_error(phydev);
 831
 832         return err;
 833 }
 834
 835 /**
 836  * phy_start_interrupts - request and enable interrupts for a PHY device
 837  * @phydev: target phy_device struct
 838  *
 839  * Description: Request the interrupt for the given PHY.
 840  *   If this fails, then we set irq to PHY_POLL.
 841  *   Otherwise, we enable the interrupts in the PHY.
 842  *   This should only be called with a valid IRQ number.
 843  *   Returns 0 on success or < 0 on error.
 844  */
 845 int phy_start_interrupts(struct phy_device *phydev)
 846 {
 847         atomic_set(&phydev->irq_disable, 0);
 848         if (request_threaded_irq(phydev->irq, NULL, phy_interrupt,
 849                                  IRQF_ONESHOT | IRQF_SHARED,
 850                                  phydev_name(phydev), phydev) < 0) {
 851                 pr_warn("%s: Can't get IRQ %d (PHY)\n",
 852                         phydev->mdio.bus->name, phydev->irq);
 853                 phydev->irq = PHY_POLL;
 854                 return 0;
 855         }
 856
 857         return phy_enable_interrupts(phydev);
 858 }
 859 EXPORT_SYMBOL(phy_start_interrupts);
 860
 861 /**
 862  * phy_stop_interrupts - disable interrupts from a PHY device
 863  * @phydev: target phy_device struct
 864  */
 865 int phy_stop_interrupts(struct phy_device *phydev)
 866 {
 867         int err = phy_disable_interrupts(phydev);
 868
 869         if (err)
 870                 phy_error(phydev);
 871
 872         free_irq(phydev->irq, phydev);
 873
 874         /* If work indeed has been cancelled, disable_irq() will have
 875          * been left unbalanced from phy_interrupt() and enable_irq()
 876          * has to be called so that other devices on the line work.
 877          */
 878         while (atomic_dec_return(&phydev->irq_disable) >= 0)
 879                 enable_irq(phydev->irq);
 880
 881         return err;
 882 }
 883 EXPORT_SYMBOL(phy_stop_interrupts);
 884
 885 /**
 886  * phy_change - Called by the phy_interrupt to handle PHY changes
 887  * @phydev: phy_device struct that interrupted
 888  */
 889 void phy_change(struct phy_device *phydev)
 890 {
 891         if (phy_interrupt_is_valid(phydev)) {
 892                 if (phydev->drv->did_interrupt &&
 893                     !phydev->drv->did_interrupt(phydev))
 894                         goto ignore;
 895
 896                 if (phy_disable_interrupts(phydev))
 897                         goto phy_err;
 898         }
 899
 900         mutex_lock(&phydev->lock);
 901         if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
 902                 phydev->state = PHY_CHANGELINK;
 903         mutex_unlock(&phydev->lock);
 904
 905         if (phy_interrupt_is_valid(phydev)) {
 906                 atomic_dec(&phydev->irq_disable);
 907                 enable_irq(phydev->irq);
 908
 909                 /* Reenable interrupts */
 910                 if (PHY_HALTED != phydev->state &&
 911                     phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED))
 912                         goto irq_enable_err;
 913         }
 914
 915         /* reschedule state queue work to run as soon as possible */
 916         phy_trigger_machine(phydev, true);
 917         return;
 918
 919 ignore:
 920         atomic_dec(&phydev->irq_disable);
 921         enable_irq(phydev->irq);
 922         return;
 923
 924 irq_enable_err:
 925         disable_irq(phydev->irq);
 926         atomic_inc(&phydev->irq_disable);
 927 phy_err:
 928         phy_error(phydev);
 929 }
 930
 931 /**
 932  * phy_change_work - Scheduled by the phy_mac_interrupt to handle PHY changes
 933  * @work: work_struct that describes the work to be done
 934  */
 935 void phy_change_work(struct work_struct *work)
 936 {
 937         struct phy_device *phydev =
 938                 container_of(work, struct phy_device, phy_queue);
 939
 940         phy_change(phydev);
 941 }
 942
 943 /**
 944  * phy_stop - Bring down the PHY link, and stop checking the status
 945  * @phydev: target phy_device struct
 946  */
 947 void phy_stop(struct phy_device *phydev)
 948 {
 949         mutex_lock(&phydev->lock);
 950
 951         if (PHY_HALTED == phydev->state)
 952                 goto out_unlock;
 953
 954         if (phy_interrupt_is_valid(phydev)) {
 955                 /* Disable PHY Interrupts */
 956                 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 957
 958                 /* Clear any pending interrupts */
 959                 phy_clear_interrupt(phydev);
 960         }
 961
 962         phydev->state = PHY_HALTED;
 963
 964 out_unlock:
 965         mutex_unlock(&phydev->lock);
 966
 967         /* Cannot call flush_scheduled_work() here as desired because
 968          * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
 969          * will not reenable interrupts.
 970          */
 971 }
 972 EXPORT_SYMBOL(phy_stop);
 973
 974 /**
 975  * phy_start - start or restart a PHY device
 976  * @phydev: target phy_device struct
 977  *
 978  * Description: Indicates the attached device's readiness to
 979  *   handle PHY-related work.  Used during startup to start the
 980  *   PHY, and after a call to phy_stop() to resume operation.
 981  *   Also used to indicate the MDIO bus has cleared an error
 982  *   condition.
 983  */
 984 void phy_start(struct phy_device *phydev)
 985 {
 986         bool do_resume = false;
 987         int err = 0;
 988
 989         mutex_lock(&phydev->lock);
 990
 991         switch (phydev->state) {
 992         case PHY_STARTING:
 993                 phydev->state = PHY_PENDING;
 994                 break;
 995         case PHY_READY:
 996                 phydev->state = PHY_UP;
 997                 break;
 998         case PHY_HALTED:
 999                 /* make sure interrupts are re-enabled for the PHY */
1000                 if (phydev->irq != PHY_POLL) {
1001                         err = phy_enable_interrupts(phydev);
1002                         if (err < 0)
1003                                 break;
1004                 }
1005
1006                 phydev->state = PHY_RESUMING;
1007                 do_resume = true;
1008                 break;
1009         default:
1010                 break;
1011         }
1012         mutex_unlock(&phydev->lock);
1013
1014         /* if phy was suspended, bring the physical link up again */
1015         if (do_resume)
1016                 phy_resume(phydev);
1017
1018         phy_trigger_machine(phydev, true);
1019 }
1020 EXPORT_SYMBOL(phy_start);
1021
1022 static void phy_adjust_link(struct phy_device *phydev)
1023 {
1024         phydev->adjust_link(phydev->attached_dev);
1025         phy_led_trigger_change_speed(phydev);
1026 }
1027
1028 /**
1029  * phy_state_machine - Handle the state machine
1030  * @work: work_struct that describes the work to be done
1031  */
1032 void phy_state_machine(struct work_struct *work)
1033 {
1034         struct delayed_work *dwork = to_delayed_work(work);
1035         struct phy_device *phydev =
1036                         container_of(dwork, struct phy_device, state_queue);
1037         bool needs_aneg = false, do_suspend = false;
1038         enum phy_state old_state;
1039         int err = 0;
1040         int old_link;
1041
1042         mutex_lock(&phydev->lock);
1043
1044         old_state = phydev->state;
1045
1046         if (phydev->drv && phydev->drv->link_change_notify)
1047                 phydev->drv->link_change_notify(phydev);
1048
1049         switch (phydev->state) {
1050         case PHY_DOWN:
1051         case PHY_STARTING:
1052         case PHY_READY:
1053         case PHY_PENDING:
1054                 break;
1055         case PHY_UP:
1056                 needs_aneg = true;
1057
1058                 phydev->link_timeout = PHY_AN_TIMEOUT;
1059
1060                 break;
1061         case PHY_AN:
1062                 err = phy_read_status(phydev);
1063                 if (err < 0)
1064                         break;
1065
1066                 /* If the link is down, give up on negotiation for now */
1067                 if (!phydev->link) {
1068                         phydev->state = PHY_NOLINK;
1069                         netif_carrier_off(phydev->attached_dev);
1070                         phy_adjust_link(phydev);
1071                         break;
1072                 }
1073
1074                 /* Check if negotiation is done.  Break if there's an error */
1075                 err = phy_aneg_done(phydev);
1076                 if (err < 0)
1077                         break;
1078
1079                 /* If AN is done, we're running */
1080                 if (err > 0) {
1081                         phydev->state = PHY_RUNNING;
1082                         netif_carrier_on(phydev->attached_dev);
1083                         phy_adjust_link(phydev);
1084
1085                 } else if (0 == phydev->link_timeout--)
1086                         needs_aneg = true;
1087                 break;
1088         case PHY_NOLINK:
1089                 if (phy_interrupt_is_valid(phydev))
1090                         break;
1091
1092                 err = phy_read_status(phydev);
1093                 if (err)
1094                         break;
1095
1096                 if (phydev->link) {
1097                         if (AUTONEG_ENABLE == phydev->autoneg) {
1098                                 err = phy_aneg_done(phydev);
1099                                 if (err < 0)
1100                                         break;
1101
1102                                 if (!err) {
1103                                         phydev->state = PHY_AN;
1104                                         phydev->link_timeout = PHY_AN_TIMEOUT;
1105                                         break;
1106                                 }
1107                         }
1108                         phydev->state = PHY_RUNNING;
1109                         netif_carrier_on(phydev->attached_dev);
1110                         phy_adjust_link(phydev);
1111                 }
1112                 break;
1113         case PHY_FORCING:
1114                 err = genphy_update_link(phydev);
1115                 if (err)
1116                         break;
1117
1118                 if (phydev->link) {
1119                         phydev->state = PHY_RUNNING;
1120                         netif_carrier_on(phydev->attached_dev);
1121                 } else {
1122                         if (0 == phydev->link_timeout--)
1123                                 needs_aneg = true;
1124                 }
1125
1126                 phy_adjust_link(phydev);
1127                 break;
1128         case PHY_RUNNING:
1129                 /* Only register a CHANGE if we are polling and link changed
1130                  * since latest checking.
1131                  */
1132                 if (phydev->irq == PHY_POLL) {
1133                         old_link = phydev->link;
1134                         err = phy_read_status(phydev);
1135                         if (err)
1136                                 break;
1137
1138                         if (old_link != phydev->link)
1139                                 phydev->state = PHY_CHANGELINK;
1140                 }
1141                 /*
1142                  * Failsafe: check that nobody set phydev->link=0 between two
1143                  * poll cycles, otherwise we won't leave RUNNING state as long
1144                  * as link remains down.
1145                  */
1146                 if (!phydev->link && phydev->state == PHY_RUNNING) {
1147                         phydev->state = PHY_CHANGELINK;
1148                         phydev_err(phydev, "no link in PHY_RUNNING\n");
1149                 }
1150                 break;
1151         case PHY_CHANGELINK:
1152                 err = phy_read_status(phydev);
1153                 if (err)
1154                         break;
1155
1156                 if (phydev->link) {
1157                         phydev->state = PHY_RUNNING;
1158                         netif_carrier_on(phydev->attached_dev);
1159                 } else {
1160                         phydev->state = PHY_NOLINK;
1161                         netif_carrier_off(phydev->attached_dev);
1162                 }
1163
1164                 phy_adjust_link(phydev);
1165
1166                 if (phy_interrupt_is_valid(phydev))
1167                         err = phy_config_interrupt(phydev,
1168                                                    PHY_INTERRUPT_ENABLED);
1169                 break;
1170         case PHY_HALTED:
1171                 if (phydev->link) {
1172                         phydev->link = 0;
1173                         netif_carrier_off(phydev->attached_dev);
1174                         phy_adjust_link(phydev);
1175                         do_suspend = true;
1176                 }
1177                 break;
1178         case PHY_RESUMING:
1179                 if (AUTONEG_ENABLE == phydev->autoneg) {
1180                         err = phy_aneg_done(phydev);
1181                         if (err < 0)
1182                                 break;
1183
1184                         /* err > 0 if AN is done.
1185                          * Otherwise, it's 0, and we're  still waiting for AN
1186                          */
1187                         if (err > 0) {
1188                                 err = phy_read_status(phydev);
1189                                 if (err)
1190                                         break;
1191
1192                                 if (phydev->link) {
1193                                         phydev->state = PHY_RUNNING;
1194                                         netif_carrier_on(phydev->attached_dev);
1195                                 } else  {
1196                                         phydev->state = PHY_NOLINK;
1197                                 }
1198                                 phy_adjust_link(phydev);
1199                         } else {
1200                                 phydev->state = PHY_AN;
1201                                 phydev->link_timeout = PHY_AN_TIMEOUT;
1202                         }
1203                 } else {
1204                         err = phy_read_status(phydev);
1205                         if (err)
1206                                 break;
1207
1208                         if (phydev->link) {
1209                                 phydev->state = PHY_RUNNING;
1210                                 netif_carrier_on(phydev->attached_dev);
1211                         } else  {
1212                                 phydev->state = PHY_NOLINK;
1213                         }
1214                         phy_adjust_link(phydev);
1215                 }
1216                 break;
1217         }
1218
1219         mutex_unlock(&phydev->lock);
1220
1221         if (needs_aneg)
1222                 err = phy_start_aneg_priv(phydev, false);
1223         else if (do_suspend)
1224                 phy_suspend(phydev);
1225
1226         if (err < 0)
1227                 phy_error(phydev);
1228
1229         phydev_dbg(phydev, "PHY state change %s -> %s\n",
1230                    phy_state_to_str(old_state),
1231                    phy_state_to_str(phydev->state));
1232
1233         /* Only re-schedule a PHY state machine change if we are polling the
1234          * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
1235          * between states from phy_mac_interrupt()
1236          */
1237         if (phydev->irq == PHY_POLL)
1238                 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
1239                                    PHY_STATE_TIME * HZ);
1240 }
1241
1242 /**
1243  * phy_mac_interrupt - MAC says the link has changed
1244  * @phydev: phy_device struct with changed link
1245  * @new_link: Link is Up/Down.
1246  *
1247  * Description: The MAC layer is able indicate there has been a change
1248  *   in the PHY link status. Set the new link status, and trigger the
1249  *   state machine, work a work queue.
1250  */
1251 void phy_mac_interrupt(struct phy_device *phydev, int new_link)
1252 {
1253         phydev->link = new_link;
1254
1255         /* Trigger a state machine change */
1256         queue_work(system_power_efficient_wq, &phydev->phy_queue);
1257 }
1258 EXPORT_SYMBOL(phy_mac_interrupt);
1259
1260 /**
1261  * phy_init_eee - init and check the EEE feature
1262  * @phydev: target phy_device struct
1263  * @clk_stop_enable: PHY may stop the clock during LPI
1264  *
1265  * Description: it checks if the Energy-Efficient Ethernet (EEE)
1266  * is supported by looking at the MMD registers 3.20 and 7.60/61
1267  * and it programs the MMD register 3.0 setting the "Clock stop enable"
1268  * bit if required.
1269  */
1270 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1271 {
1272         if (!phydev->drv)
1273                 return -EIO;
1274
1275         /* According to 802.3az,the EEE is supported only in full duplex-mode.
1276          */
1277         if (phydev->duplex == DUPLEX_FULL) {
1278                 int eee_lp, eee_cap, eee_adv;
1279                 u32 lp, cap, adv;
1280                 int status;
1281
1282                 /* Read phy status to properly get the right settings */
1283                 status = phy_read_status(phydev);
1284                 if (status)
1285                         return status;
1286
1287                 /* First check if the EEE ability is supported */
1288                 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1289                 if (eee_cap <= 0)
1290                         goto eee_exit_err;
1291
1292                 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1293                 if (!cap)
1294                         goto eee_exit_err;
1295
1296                 /* Check which link settings negotiated and verify it in
1297                  * the EEE advertising registers.
1298                  */
1299                 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1300                 if (eee_lp <= 0)
1301                         goto eee_exit_err;
1302
1303                 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1304                 if (eee_adv <= 0)
1305                         goto eee_exit_err;
1306
1307                 adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
1308                 lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
1309                 if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv))
1310                         goto eee_exit_err;
1311
1312                 if (clk_stop_enable) {
1313                         /* Configure the PHY to stop receiving xMII
1314                          * clock while it is signaling LPI.
1315                          */
1316                         int val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
1317                         if (val < 0)
1318                                 return val;
1319
1320                         val |= MDIO_PCS_CTRL1_CLKSTOP_EN;
1321                         phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, val);
1322                 }
1323
1324                 return 0; /* EEE supported */
1325         }
1326 eee_exit_err:
1327         return -EPROTONOSUPPORT;
1328 }
1329 EXPORT_SYMBOL(phy_init_eee);
1330
1331 /**
1332  * phy_get_eee_err - report the EEE wake error count
1333  * @phydev: target phy_device struct
1334  *
1335  * Description: it is to report the number of time where the PHY
1336  * failed to complete its normal wake sequence.
1337  */
1338 int phy_get_eee_err(struct phy_device *phydev)
1339 {
1340         if (!phydev->drv)
1341                 return -EIO;
1342
1343         return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1344 }
1345 EXPORT_SYMBOL(phy_get_eee_err);
1346
1347 /**
1348  * phy_ethtool_get_eee - get EEE supported and status
1349  * @phydev: target phy_device struct
1350  * @data: ethtool_eee data
1351  *
1352  * Description: it reportes the Supported/Advertisement/LP Advertisement
1353  * capabilities.
1354  */
1355 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1356 {
1357         int val;
1358
1359         if (!phydev->drv)
1360                 return -EIO;
1361
1362         /* Get Supported EEE */
1363         val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1364         if (val < 0)
1365                 return val;
1366         data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1367
1368         /* Get advertisement EEE */
1369         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1370         if (val < 0)
1371                 return val;
1372         data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1373
1374         /* Get LP advertisement EEE */
1375         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1376         if (val < 0)
1377                 return val;
1378         data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1379
1380         return 0;
1381 }
1382 EXPORT_SYMBOL(phy_ethtool_get_eee);
1383
1384 /**
1385  * phy_ethtool_set_eee - set EEE supported and status
1386  * @phydev: target phy_device struct
1387  * @data: ethtool_eee data
1388  *
1389  * Description: it is to program the Advertisement EEE register.
1390  */
1391 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1392 {
1393         int cap, old_adv, adv, ret;
1394
1395         if (!phydev->drv)
1396                 return -EIO;
1397
1398         /* Get Supported EEE */
1399         cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1400         if (cap < 0)
1401                 return cap;
1402
1403         old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1404         if (old_adv < 0)
1405                 return old_adv;
1406
1407         adv = ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1408
1409         /* Mask prohibited EEE modes */
1410         adv &= ~phydev->eee_broken_modes;
1411
1412         if (old_adv != adv) {
1413                 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1414                 if (ret < 0)
1415                         return ret;
1416
1417                 /* Restart autonegotiation so the new modes get sent to the
1418                  * link partner.
1419                  */
1420                 ret = genphy_restart_aneg(phydev);
1421                 if (ret < 0)
1422                         return ret;
1423         }
1424
1425         return 0;
1426 }
1427 EXPORT_SYMBOL(phy_ethtool_set_eee);
1428
1429 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1430 {
1431         if (phydev->drv && phydev->drv->set_wol)
1432                 return phydev->drv->set_wol(phydev, wol);
1433
1434         return -EOPNOTSUPP;
1435 }
1436 EXPORT_SYMBOL(phy_ethtool_set_wol);
1437
1438 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1439 {
1440         if (phydev->drv && phydev->drv->get_wol)
1441                 phydev->drv->get_wol(phydev, wol);
1442 }
1443 EXPORT_SYMBOL(phy_ethtool_get_wol);
1444
1445 int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1446                                    struct ethtool_link_ksettings *cmd)
1447 {
1448         struct phy_device *phydev = ndev->phydev;
1449
1450         if (!phydev)
1451                 return -ENODEV;
1452
1453         return phy_ethtool_ksettings_get(phydev, cmd);
1454 }
1455 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1456
1457 int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1458                                    const struct ethtool_link_ksettings *cmd)
1459 {
1460         struct phy_device *phydev = ndev->phydev;
1461
1462         if (!phydev)
1463                 return -ENODEV;
1464
1465         return phy_ethtool_ksettings_set(phydev, cmd);
1466 }
1467 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1468
1469 int phy_ethtool_nway_reset(struct net_device *ndev)
1470 {
1471         struct phy_device *phydev = ndev->phydev;
1472
1473         if (!phydev)
1474                 return -ENODEV;
1475
1476         if (!phydev->drv)
1477                 return -EIO;
1478
1479         return genphy_restart_aneg(phydev);
1480 }
1481 EXPORT_SYMBOL(phy_ethtool_nway_reset);