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