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_10000:
  54                 return "10Gbps";
  55         case SPEED_UNKNOWN:
  56                 return "Unknown";
  57         default:
  58                 return "Unsupported (update phy.c)";
  59         }
  60 }
  61
  62 #define PHY_STATE_STR(_state)                   \
  63         case PHY_##_state:                      \
  64                 return __stringify(_state);     \
  65
  66 static const char *phy_state_to_str(enum phy_state st)
  67 {
  68         switch (st) {
  69         PHY_STATE_STR(DOWN)
  70         PHY_STATE_STR(STARTING)
  71         PHY_STATE_STR(READY)
  72         PHY_STATE_STR(PENDING)
  73         PHY_STATE_STR(UP)
  74         PHY_STATE_STR(AN)
  75         PHY_STATE_STR(RUNNING)
  76         PHY_STATE_STR(NOLINK)
  77         PHY_STATE_STR(FORCING)
  78         PHY_STATE_STR(CHANGELINK)
  79         PHY_STATE_STR(HALTED)
  80         PHY_STATE_STR(RESUMING)
  81         }
  82
  83         return NULL;
  84 }
  85
  86
  87 /**
  88  * phy_print_status - Convenience function to print out the current phy status
  89  * @phydev: the phy_device struct
  90  */
  91 void phy_print_status(struct phy_device *phydev)
  92 {
  93         if (phydev->link) {
  94                 netdev_info(phydev->attached_dev,
  95                         "Link is Up - %s/%s - flow control %s\n",
  96                         phy_speed_to_str(phydev->speed),
  97                         DUPLEX_FULL == phydev->duplex ? "Full" : "Half",
  98                         phydev->pause ? "rx/tx" : "off");
  99         } else  {
 100                 netdev_info(phydev->attached_dev, "Link is Down\n");
 101         }
 102 }
 103 EXPORT_SYMBOL(phy_print_status);
 104
 105 /**
 106  * phy_clear_interrupt - Ack the phy device's interrupt
 107  * @phydev: the phy_device struct
 108  *
 109  * If the @phydev driver has an ack_interrupt function, call it to
 110  * ack and clear the phy device's interrupt.
 111  *
 112  * Returns 0 on success or < 0 on error.
 113  */
 114 static int phy_clear_interrupt(struct phy_device *phydev)
 115 {
 116         if (phydev->drv->ack_interrupt)
 117                 return phydev->drv->ack_interrupt(phydev);
 118
 119         return 0;
 120 }
 121
 122 /**
 123  * phy_config_interrupt - configure the PHY device for the requested interrupts
 124  * @phydev: the phy_device struct
 125  * @interrupts: interrupt flags to configure for this @phydev
 126  *
 127  * Returns 0 on success or < 0 on error.
 128  */
 129 static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
 130 {
 131         phydev->interrupts = interrupts;
 132         if (phydev->drv->config_intr)
 133                 return phydev->drv->config_intr(phydev);
 134
 135         return 0;
 136 }
 137
 138
 139 /**
 140  * phy_aneg_done - return auto-negotiation status
 141  * @phydev: target phy_device struct
 142  *
 143  * Description: Return the auto-negotiation status from this @phydev
 144  * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
 145  * is still pending.
 146  */
 147 int phy_aneg_done(struct phy_device *phydev)
 148 {
 149         if (phydev->drv->aneg_done)
 150                 return phydev->drv->aneg_done(phydev);
 151
 152         return genphy_aneg_done(phydev);
 153 }
 154 EXPORT_SYMBOL(phy_aneg_done);
 155
 156 /* A structure for mapping a particular speed and duplex
 157  * combination to a particular SUPPORTED and ADVERTISED value
 158  */
 159 struct phy_setting {
 160         int speed;
 161         int duplex;
 162         u32 setting;
 163 };
 164
 165 /* A mapping of all SUPPORTED settings to speed/duplex */
 166 static const struct phy_setting settings[] = {
 167         {
 168                 .speed = SPEED_10000,
 169                 .duplex = DUPLEX_FULL,
 170                 .setting = SUPPORTED_10000baseKR_Full,
 171         },
 172         {
 173                 .speed = SPEED_10000,
 174                 .duplex = DUPLEX_FULL,
 175                 .setting = SUPPORTED_10000baseKX4_Full,
 176         },
 177         {
 178                 .speed = SPEED_10000,
 179                 .duplex = DUPLEX_FULL,
 180                 .setting = SUPPORTED_10000baseT_Full,
 181         },
 182         {
 183                 .speed = SPEED_2500,
 184                 .duplex = DUPLEX_FULL,
 185                 .setting = SUPPORTED_2500baseX_Full,
 186         },
 187         {
 188                 .speed = SPEED_1000,
 189                 .duplex = DUPLEX_FULL,
 190                 .setting = SUPPORTED_1000baseKX_Full,
 191         },
 192         {
 193                 .speed = SPEED_1000,
 194                 .duplex = DUPLEX_FULL,
 195                 .setting = SUPPORTED_1000baseT_Full,
 196         },
 197         {
 198                 .speed = SPEED_1000,
 199                 .duplex = DUPLEX_HALF,
 200                 .setting = SUPPORTED_1000baseT_Half,
 201         },
 202         {
 203                 .speed = SPEED_100,
 204                 .duplex = DUPLEX_FULL,
 205                 .setting = SUPPORTED_100baseT_Full,
 206         },
 207         {
 208                 .speed = SPEED_100,
 209                 .duplex = DUPLEX_HALF,
 210                 .setting = SUPPORTED_100baseT_Half,
 211         },
 212         {
 213                 .speed = SPEED_10,
 214                 .duplex = DUPLEX_FULL,
 215                 .setting = SUPPORTED_10baseT_Full,
 216         },
 217         {
 218                 .speed = SPEED_10,
 219                 .duplex = DUPLEX_HALF,
 220                 .setting = SUPPORTED_10baseT_Half,
 221         },
 222 };
 223
 224 #define MAX_NUM_SETTINGS ARRAY_SIZE(settings)
 225
 226 /**
 227  * phy_find_setting - find a PHY settings array entry that matches speed & duplex
 228  * @speed: speed to match
 229  * @duplex: duplex to match
 230  *
 231  * Description: Searches the settings array for the setting which
 232  *   matches the desired speed and duplex, and returns the index
 233  *   of that setting.  Returns the index of the last setting if
 234  *   none of the others match.
 235  */
 236 static inline unsigned int phy_find_setting(int speed, int duplex)
 237 {
 238         unsigned int idx = 0;
 239
 240         while (idx < ARRAY_SIZE(settings) &&
 241                (settings[idx].speed != speed || settings[idx].duplex != duplex))
 242                 idx++;
 243
 244         return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
 245 }
 246
 247 /**
 248  * phy_find_valid - find a PHY setting that matches the requested features mask
 249  * @idx: The first index in settings[] to search
 250  * @features: A mask of the valid settings
 251  *
 252  * Description: Returns the index of the first valid setting less
 253  *   than or equal to the one pointed to by idx, as determined by
 254  *   the mask in features.  Returns the index of the last setting
 255  *   if nothing else matches.
 256  */
 257 static inline unsigned int phy_find_valid(unsigned int idx, u32 features)
 258 {
 259         while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features))
 260                 idx++;
 261
 262         return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
 263 }
 264
 265 /**
 266  * phy_supported_speeds - return all speeds currently supported by a phy device
 267  * @phy: The phy device to return supported speeds of.
 268  * @speeds: buffer to store supported speeds in.
 269  * @size:   size of speeds buffer.
 270  *
 271  * Description: Returns the number of supported speeds, and fills the speeds
 272  * buffer with the supported speeds. If speeds buffer is too small to contain
 273  * all currently supported speeds, will return as many speeds as can fit.
 274  */
 275 unsigned int phy_supported_speeds(struct phy_device *phy,
 276                                   unsigned int *speeds,
 277                                   unsigned int size)
 278 {
 279         unsigned int count = 0;
 280         unsigned int idx = 0;
 281
 282         while (idx < MAX_NUM_SETTINGS && count < size) {
 283                 idx = phy_find_valid(idx, phy->supported);
 284
 285                 if (!(settings[idx].setting & phy->supported))
 286                         break;
 287
 288                 /* Assumes settings are grouped by speed */
 289                 if ((count == 0) ||
 290                     (speeds[count - 1] != settings[idx].speed)) {
 291                         speeds[count] = settings[idx].speed;
 292                         count++;
 293                 }
 294                 idx++;
 295         }
 296
 297         return count;
 298 }
 299
 300 /**
 301  * phy_check_valid - check if there is a valid PHY setting which matches
 302  *                   speed, duplex, and feature mask
 303  * @speed: speed to match
 304  * @duplex: duplex to match
 305  * @features: A mask of the valid settings
 306  *
 307  * Description: Returns true if there is a valid setting, false otherwise.
 308  */
 309 static inline bool phy_check_valid(int speed, int duplex, u32 features)
 310 {
 311         unsigned int idx;
 312
 313         idx = phy_find_valid(phy_find_setting(speed, duplex), features);
 314
 315         return settings[idx].speed == speed && settings[idx].duplex == duplex &&
 316                 (settings[idx].setting & features);
 317 }
 318
 319 /**
 320  * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
 321  * @phydev: the target phy_device struct
 322  *
 323  * Description: Make sure the PHY is set to supported speeds and
 324  *   duplexes.  Drop down by one in this order:  1000/FULL,
 325  *   1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
 326  */
 327 static void phy_sanitize_settings(struct phy_device *phydev)
 328 {
 329         u32 features = phydev->supported;
 330         unsigned int idx;
 331
 332         /* Sanitize settings based on PHY capabilities */
 333         if ((features & SUPPORTED_Autoneg) == 0)
 334                 phydev->autoneg = AUTONEG_DISABLE;
 335
 336         idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
 337                         features);
 338
 339         phydev->speed = settings[idx].speed;
 340         phydev->duplex = settings[idx].duplex;
 341 }
 342
 343 /**
 344  * phy_ethtool_sset - generic ethtool sset function, handles all the details
 345  * @phydev: target phy_device struct
 346  * @cmd: ethtool_cmd
 347  *
 348  * A few notes about parameter checking:
 349  * - We don't set port or transceiver, so we don't care what they
 350  *   were set to.
 351  * - phy_start_aneg() will make sure forced settings are sane, and
 352  *   choose the next best ones from the ones selected, so we don't
 353  *   care if ethtool tries to give us bad values.
 354  */
 355 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
 356 {
 357         u32 speed = ethtool_cmd_speed(cmd);
 358
 359         if (cmd->phy_address != phydev->mdio.addr)
 360                 return -EINVAL;
 361
 362         /* We make sure that we don't pass unsupported values in to the PHY */
 363         cmd->advertising &= phydev->supported;
 364
 365         /* Verify the settings we care about. */
 366         if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
 367                 return -EINVAL;
 368
 369         if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
 370                 return -EINVAL;
 371
 372         if (cmd->autoneg == AUTONEG_DISABLE &&
 373             ((speed != SPEED_1000 &&
 374               speed != SPEED_100 &&
 375               speed != SPEED_10) ||
 376              (cmd->duplex != DUPLEX_HALF &&
 377               cmd->duplex != DUPLEX_FULL)))
 378                 return -EINVAL;
 379
 380         phydev->autoneg = cmd->autoneg;
 381
 382         phydev->speed = speed;
 383
 384         phydev->advertising = cmd->advertising;
 385
 386         if (AUTONEG_ENABLE == cmd->autoneg)
 387                 phydev->advertising |= ADVERTISED_Autoneg;
 388         else
 389                 phydev->advertising &= ~ADVERTISED_Autoneg;
 390
 391         phydev->duplex = cmd->duplex;
 392
 393         phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl;
 394
 395         /* Restart the PHY */
 396         phy_start_aneg(phydev);
 397
 398         return 0;
 399 }
 400 EXPORT_SYMBOL(phy_ethtool_sset);
 401
 402 int phy_ethtool_ksettings_set(struct phy_device *phydev,
 403                               const struct ethtool_link_ksettings *cmd)
 404 {
 405         u8 autoneg = cmd->base.autoneg;
 406         u8 duplex = cmd->base.duplex;
 407         u32 speed = cmd->base.speed;
 408         u32 advertising;
 409
 410         if (cmd->base.phy_address != phydev->mdio.addr)
 411                 return -EINVAL;
 412
 413         ethtool_convert_link_mode_to_legacy_u32(&advertising,
 414                                                 cmd->link_modes.advertising);
 415
 416         /* We make sure that we don't pass unsupported values in to the PHY */
 417         advertising &= phydev->supported;
 418
 419         /* Verify the settings we care about. */
 420         if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
 421                 return -EINVAL;
 422
 423         if (autoneg == AUTONEG_ENABLE && advertising == 0)
 424                 return -EINVAL;
 425
 426         if (autoneg == AUTONEG_DISABLE &&
 427             ((speed != SPEED_1000 &&
 428               speed != SPEED_100 &&
 429               speed != SPEED_10) ||
 430              (duplex != DUPLEX_HALF &&
 431               duplex != DUPLEX_FULL)))
 432                 return -EINVAL;
 433
 434         phydev->autoneg = autoneg;
 435
 436         phydev->speed = speed;
 437
 438         phydev->advertising = advertising;
 439
 440         if (autoneg == AUTONEG_ENABLE)
 441                 phydev->advertising |= ADVERTISED_Autoneg;
 442         else
 443                 phydev->advertising &= ~ADVERTISED_Autoneg;
 444
 445         phydev->duplex = duplex;
 446
 447         phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
 448
 449         /* Restart the PHY */
 450         phy_start_aneg(phydev);
 451
 452         return 0;
 453 }
 454 EXPORT_SYMBOL(phy_ethtool_ksettings_set);
 455
 456 int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
 457 {
 458         cmd->supported = phydev->supported;
 459
 460         cmd->advertising = phydev->advertising;
 461         cmd->lp_advertising = phydev->lp_advertising;
 462
 463         ethtool_cmd_speed_set(cmd, phydev->speed);
 464         cmd->duplex = phydev->duplex;
 465         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 466                 cmd->port = PORT_BNC;
 467         else
 468                 cmd->port = PORT_MII;
 469         cmd->phy_address = phydev->mdio.addr;
 470         cmd->transceiver = phy_is_internal(phydev) ?
 471                 XCVR_INTERNAL : XCVR_EXTERNAL;
 472         cmd->autoneg = phydev->autoneg;
 473         cmd->eth_tp_mdix_ctrl = phydev->mdix_ctrl;
 474         cmd->eth_tp_mdix = phydev->mdix;
 475
 476         return 0;
 477 }
 478 EXPORT_SYMBOL(phy_ethtool_gset);
 479
 480 int phy_ethtool_ksettings_get(struct phy_device *phydev,
 481                               struct ethtool_link_ksettings *cmd)
 482 {
 483         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
 484                                                 phydev->supported);
 485
 486         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
 487                                                 phydev->advertising);
 488
 489         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
 490                                                 phydev->lp_advertising);
 491
 492         cmd->base.speed = phydev->speed;
 493         cmd->base.duplex = phydev->duplex;
 494         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 495                 cmd->base.port = PORT_BNC;
 496         else
 497                 cmd->base.port = PORT_MII;
 498
 499         cmd->base.phy_address = phydev->mdio.addr;
 500         cmd->base.autoneg = phydev->autoneg;
 501         cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
 502         cmd->base.eth_tp_mdix = phydev->mdix;
 503
 504         return 0;
 505 }
 506 EXPORT_SYMBOL(phy_ethtool_ksettings_get);
 507
 508 /**
 509  * phy_mii_ioctl - generic PHY MII ioctl interface
 510  * @phydev: the phy_device struct
 511  * @ifr: &struct ifreq for socket ioctl's
 512  * @cmd: ioctl cmd to execute
 513  *
 514  * Note that this function is currently incompatible with the
 515  * PHYCONTROL layer.  It changes registers without regard to
 516  * current state.  Use at own risk.
 517  */
 518 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
 519 {
 520         struct mii_ioctl_data *mii_data = if_mii(ifr);
 521         u16 val = mii_data->val_in;
 522         bool change_autoneg = false;
 523
 524         switch (cmd) {
 525         case SIOCGMIIPHY:
 526                 mii_data->phy_id = phydev->mdio.addr;
 527                 /* fall through */
 528
 529         case SIOCGMIIREG:
 530                 mii_data->val_out = mdiobus_read(phydev->mdio.bus,
 531                                                  mii_data->phy_id,
 532                                                  mii_data->reg_num);
 533                 return 0;
 534
 535         case SIOCSMIIREG:
 536                 if (mii_data->phy_id == phydev->mdio.addr) {
 537                         switch (mii_data->reg_num) {
 538                         case MII_BMCR:
 539                                 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
 540                                         if (phydev->autoneg == AUTONEG_ENABLE)
 541                                                 change_autoneg = true;
 542                                         phydev->autoneg = AUTONEG_DISABLE;
 543                                         if (val & BMCR_FULLDPLX)
 544                                                 phydev->duplex = DUPLEX_FULL;
 545                                         else
 546                                                 phydev->duplex = DUPLEX_HALF;
 547                                         if (val & BMCR_SPEED1000)
 548                                                 phydev->speed = SPEED_1000;
 549                                         else if (val & BMCR_SPEED100)
 550                                                 phydev->speed = SPEED_100;
 551                                         else phydev->speed = SPEED_10;
 552                                 }
 553                                 else {
 554                                         if (phydev->autoneg == AUTONEG_DISABLE)
 555                                                 change_autoneg = true;
 556                                         phydev->autoneg = AUTONEG_ENABLE;
 557                                 }
 558                                 break;
 559                         case MII_ADVERTISE:
 560                                 phydev->advertising = mii_adv_to_ethtool_adv_t(val);
 561                                 change_autoneg = true;
 562                                 break;
 563                         default:
 564                                 /* do nothing */
 565                                 break;
 566                         }
 567                 }
 568
 569                 mdiobus_write(phydev->mdio.bus, mii_data->phy_id,
 570                               mii_data->reg_num, val);
 571
 572                 if (mii_data->phy_id == phydev->mdio.addr &&
 573                     mii_data->reg_num == MII_BMCR &&
 574                     val & BMCR_RESET)
 575                         return phy_init_hw(phydev);
 576
 577                 if (change_autoneg)
 578                         return phy_start_aneg(phydev);
 579
 580                 return 0;
 581
 582         case SIOCSHWTSTAMP:
 583                 if (phydev->drv->hwtstamp)
 584                         return phydev->drv->hwtstamp(phydev, ifr);
 585                 /* fall through */
 586
 587         default:
 588                 return -EOPNOTSUPP;
 589         }
 590 }
 591 EXPORT_SYMBOL(phy_mii_ioctl);
 592
 593 /**
 594  * phy_start_aneg - start auto-negotiation for this PHY device
 595  * @phydev: the phy_device struct
 596  *
 597  * Description: Sanitizes the settings (if we're not autonegotiating
 598  *   them), and then calls the driver's config_aneg function.
 599  *   If the PHYCONTROL Layer is operating, we change the state to
 600  *   reflect the beginning of Auto-negotiation or forcing.
 601  */
 602 int phy_start_aneg(struct phy_device *phydev)
 603 {
 604         int err;
 605
 606         mutex_lock(&phydev->lock);
 607
 608         if (AUTONEG_DISABLE == phydev->autoneg)
 609                 phy_sanitize_settings(phydev);
 610
 611         /* Invalidate LP advertising flags */
 612         phydev->lp_advertising = 0;
 613
 614         err = phydev->drv->config_aneg(phydev);
 615         if (err < 0)
 616                 goto out_unlock;
 617
 618         if (phydev->state != PHY_HALTED) {
 619                 if (AUTONEG_ENABLE == phydev->autoneg) {
 620                         phydev->state = PHY_AN;
 621                         phydev->link_timeout = PHY_AN_TIMEOUT;
 622                 } else {
 623                         phydev->state = PHY_FORCING;
 624                         phydev->link_timeout = PHY_FORCE_TIMEOUT;
 625                 }
 626         }
 627
 628 out_unlock:
 629         mutex_unlock(&phydev->lock);
 630         return err;
 631 }
 632 EXPORT_SYMBOL(phy_start_aneg);
 633
 634 /**
 635  * phy_start_machine - start PHY state machine tracking
 636  * @phydev: the phy_device struct
 637  *
 638  * Description: The PHY infrastructure can run a state machine
 639  *   which tracks whether the PHY is starting up, negotiating,
 640  *   etc.  This function starts the timer which tracks the state
 641  *   of the PHY.  If you want to maintain your own state machine,
 642  *   do not call this function.
 643  */
 644 void phy_start_machine(struct phy_device *phydev)
 645 {
 646         queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
 647 }
 648
 649 /**
 650  * phy_trigger_machine - trigger the state machine to run
 651  *
 652  * @phydev: the phy_device struct
 653  * @sync: indicate whether we should wait for the workqueue cancelation
 654  *
 655  * Description: There has been a change in state which requires that the
 656  *   state machine runs.
 657  */
 658
 659 static void phy_trigger_machine(struct phy_device *phydev, bool sync)
 660 {
 661         if (sync)
 662                 cancel_delayed_work_sync(&phydev->state_queue);
 663         else
 664                 cancel_delayed_work(&phydev->state_queue);
 665         queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
 666 }
 667
 668 /**
 669  * phy_stop_machine - stop the PHY state machine tracking
 670  * @phydev: target phy_device struct
 671  *
 672  * Description: Stops the state machine timer, sets the state to UP
 673  *   (unless it wasn't up yet). This function must be called BEFORE
 674  *   phy_detach.
 675  */
 676 void phy_stop_machine(struct phy_device *phydev)
 677 {
 678         cancel_delayed_work_sync(&phydev->state_queue);
 679
 680         mutex_lock(&phydev->lock);
 681         if (phydev->state > PHY_UP)
 682                 phydev->state = PHY_UP;
 683         mutex_unlock(&phydev->lock);
 684 }
 685
 686 /**
 687  * phy_error - enter HALTED state for this PHY device
 688  * @phydev: target phy_device struct
 689  *
 690  * Moves the PHY to the HALTED state in response to a read
 691  * or write error, and tells the controller the link is down.
 692  * Must not be called from interrupt context, or while the
 693  * phydev->lock is held.
 694  */
 695 static void phy_error(struct phy_device *phydev)
 696 {
 697         mutex_lock(&phydev->lock);
 698         phydev->state = PHY_HALTED;
 699         mutex_unlock(&phydev->lock);
 700
 701         phy_trigger_machine(phydev, false);
 702 }
 703
 704 /**
 705  * phy_interrupt - PHY interrupt handler
 706  * @irq: interrupt line
 707  * @phy_dat: phy_device pointer
 708  *
 709  * Description: When a PHY interrupt occurs, the handler disables
 710  * interrupts, and uses phy_change to handle the interrupt.
 711  */
 712 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
 713 {
 714         struct phy_device *phydev = phy_dat;
 715
 716         if (PHY_HALTED == phydev->state)
 717                 return IRQ_NONE;                /* It can't be ours.  */
 718
 719         disable_irq_nosync(irq);
 720         atomic_inc(&phydev->irq_disable);
 721
 722         phy_change(phydev);
 723
 724         return IRQ_HANDLED;
 725 }
 726
 727 /**
 728  * phy_enable_interrupts - Enable the interrupts from the PHY side
 729  * @phydev: target phy_device struct
 730  */
 731 static int phy_enable_interrupts(struct phy_device *phydev)
 732 {
 733         int err = phy_clear_interrupt(phydev);
 734
 735         if (err < 0)
 736                 return err;
 737
 738         return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
 739 }
 740
 741 /**
 742  * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
 743  * @phydev: target phy_device struct
 744  */
 745 static int phy_disable_interrupts(struct phy_device *phydev)
 746 {
 747         int err;
 748
 749         /* Disable PHY interrupts */
 750         err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 751         if (err)
 752                 goto phy_err;
 753
 754         /* Clear the interrupt */
 755         err = phy_clear_interrupt(phydev);
 756         if (err)
 757                 goto phy_err;
 758
 759         return 0;
 760
 761 phy_err:
 762         phy_error(phydev);
 763
 764         return err;
 765 }
 766
 767 /**
 768  * phy_start_interrupts - request and enable interrupts for a PHY device
 769  * @phydev: target phy_device struct
 770  *
 771  * Description: Request the interrupt for the given PHY.
 772  *   If this fails, then we set irq to PHY_POLL.
 773  *   Otherwise, we enable the interrupts in the PHY.
 774  *   This should only be called with a valid IRQ number.
 775  *   Returns 0 on success or < 0 on error.
 776  */
 777 int phy_start_interrupts(struct phy_device *phydev)
 778 {
 779         atomic_set(&phydev->irq_disable, 0);
 780         if (request_threaded_irq(phydev->irq, NULL, phy_interrupt,
 781                                  IRQF_ONESHOT | IRQF_SHARED,
 782                                  phydev_name(phydev), phydev) < 0) {
 783                 pr_warn("%s: Can't get IRQ %d (PHY)\n",
 784                         phydev->mdio.bus->name, phydev->irq);
 785                 phydev->irq = PHY_POLL;
 786                 return 0;
 787         }
 788
 789         return phy_enable_interrupts(phydev);
 790 }
 791 EXPORT_SYMBOL(phy_start_interrupts);
 792
 793 /**
 794  * phy_stop_interrupts - disable interrupts from a PHY device
 795  * @phydev: target phy_device struct
 796  */
 797 int phy_stop_interrupts(struct phy_device *phydev)
 798 {
 799         int err = phy_disable_interrupts(phydev);
 800
 801         if (err)
 802                 phy_error(phydev);
 803
 804         free_irq(phydev->irq, phydev);
 805
 806         /* If work indeed has been cancelled, disable_irq() will have
 807          * been left unbalanced from phy_interrupt() and enable_irq()
 808          * has to be called so that other devices on the line work.
 809          */
 810         while (atomic_dec_return(&phydev->irq_disable) >= 0)
 811                 enable_irq(phydev->irq);
 812
 813         return err;
 814 }
 815 EXPORT_SYMBOL(phy_stop_interrupts);
 816
 817 /**
 818  * phy_change - Called by the phy_interrupt to handle PHY changes
 819  * @phydev: phy_device struct that interrupted
 820  */
 821 void phy_change(struct phy_device *phydev)
 822 {
 823         if (phy_interrupt_is_valid(phydev)) {
 824                 if (phydev->drv->did_interrupt &&
 825                     !phydev->drv->did_interrupt(phydev))
 826                         goto ignore;
 827
 828                 if (phy_disable_interrupts(phydev))
 829                         goto phy_err;
 830         }
 831
 832         mutex_lock(&phydev->lock);
 833         if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
 834                 phydev->state = PHY_CHANGELINK;
 835         mutex_unlock(&phydev->lock);
 836
 837         if (phy_interrupt_is_valid(phydev)) {
 838                 atomic_dec(&phydev->irq_disable);
 839                 enable_irq(phydev->irq);
 840
 841                 /* Reenable interrupts */
 842                 if (PHY_HALTED != phydev->state &&
 843                     phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED))
 844                         goto irq_enable_err;
 845         }
 846
 847         /* reschedule state queue work to run as soon as possible */
 848         phy_trigger_machine(phydev, true);
 849         return;
 850
 851 ignore:
 852         atomic_dec(&phydev->irq_disable);
 853         enable_irq(phydev->irq);
 854         return;
 855
 856 irq_enable_err:
 857         disable_irq(phydev->irq);
 858         atomic_inc(&phydev->irq_disable);
 859 phy_err:
 860         phy_error(phydev);
 861 }
 862
 863 /**
 864  * phy_change_work - Scheduled by the phy_mac_interrupt to handle PHY changes
 865  * @work: work_struct that describes the work to be done
 866  */
 867 void phy_change_work(struct work_struct *work)
 868 {
 869         struct phy_device *phydev =
 870                 container_of(work, struct phy_device, phy_queue);
 871
 872         phy_change(phydev);
 873 }
 874
 875 /**
 876  * phy_stop - Bring down the PHY link, and stop checking the status
 877  * @phydev: target phy_device struct
 878  */
 879 void phy_stop(struct phy_device *phydev)
 880 {
 881         mutex_lock(&phydev->lock);
 882
 883         if (PHY_HALTED == phydev->state)
 884                 goto out_unlock;
 885
 886         if (phy_interrupt_is_valid(phydev)) {
 887                 /* Disable PHY Interrupts */
 888                 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 889
 890                 /* Clear any pending interrupts */
 891                 phy_clear_interrupt(phydev);
 892         }
 893
 894         phydev->state = PHY_HALTED;
 895
 896 out_unlock:
 897         mutex_unlock(&phydev->lock);
 898
 899         /* Cannot call flush_scheduled_work() here as desired because
 900          * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
 901          * will not reenable interrupts.
 902          */
 903 }
 904 EXPORT_SYMBOL(phy_stop);
 905
 906 /**
 907  * phy_start - start or restart a PHY device
 908  * @phydev: target phy_device struct
 909  *
 910  * Description: Indicates the attached device's readiness to
 911  *   handle PHY-related work.  Used during startup to start the
 912  *   PHY, and after a call to phy_stop() to resume operation.
 913  *   Also used to indicate the MDIO bus has cleared an error
 914  *   condition.
 915  */
 916 void phy_start(struct phy_device *phydev)
 917 {
 918         bool do_resume = false;
 919         int err = 0;
 920
 921         mutex_lock(&phydev->lock);
 922
 923         switch (phydev->state) {
 924         case PHY_STARTING:
 925                 phydev->state = PHY_PENDING;
 926                 break;
 927         case PHY_READY:
 928                 phydev->state = PHY_UP;
 929                 break;
 930         case PHY_HALTED:
 931                 /* make sure interrupts are re-enabled for the PHY */
 932                 if (phydev->irq != PHY_POLL) {
 933                         err = phy_enable_interrupts(phydev);
 934                         if (err < 0)
 935                                 break;
 936                 }
 937
 938                 phydev->state = PHY_RESUMING;
 939                 do_resume = true;
 940                 break;
 941         default:
 942                 break;
 943         }
 944         mutex_unlock(&phydev->lock);
 945
 946         /* if phy was suspended, bring the physical link up again */
 947         if (do_resume)
 948                 phy_resume(phydev);
 949
 950         phy_trigger_machine(phydev, true);
 951 }
 952 EXPORT_SYMBOL(phy_start);
 953
 954 static void phy_adjust_link(struct phy_device *phydev)
 955 {
 956         phydev->adjust_link(phydev->attached_dev);
 957         phy_led_trigger_change_speed(phydev);
 958 }
 959
 960 /**
 961  * phy_state_machine - Handle the state machine
 962  * @work: work_struct that describes the work to be done
 963  */
 964 void phy_state_machine(struct work_struct *work)
 965 {
 966         struct delayed_work *dwork = to_delayed_work(work);
 967         struct phy_device *phydev =
 968                         container_of(dwork, struct phy_device, state_queue);
 969         bool needs_aneg = false, do_suspend = false;
 970         enum phy_state old_state;
 971         int err = 0;
 972         int old_link;
 973
 974         mutex_lock(&phydev->lock);
 975
 976         old_state = phydev->state;
 977
 978         if (phydev->drv->link_change_notify)
 979                 phydev->drv->link_change_notify(phydev);
 980
 981         switch (phydev->state) {
 982         case PHY_DOWN:
 983         case PHY_STARTING:
 984         case PHY_READY:
 985         case PHY_PENDING:
 986                 break;
 987         case PHY_UP:
 988                 needs_aneg = true;
 989
 990                 phydev->link_timeout = PHY_AN_TIMEOUT;
 991
 992                 break;
 993         case PHY_AN:
 994                 err = phy_read_status(phydev);
 995                 if (err < 0)
 996                         break;
 997
 998                 /* If the link is down, give up on negotiation for now */
 999                 if (!phydev->link) {
1000                         phydev->state = PHY_NOLINK;
1001                         netif_carrier_off(phydev->attached_dev);
1002                         phy_adjust_link(phydev);
1003                         break;
1004                 }
1005
1006                 /* Check if negotiation is done.  Break if there's an error */
1007                 err = phy_aneg_done(phydev);
1008                 if (err < 0)
1009                         break;
1010
1011                 /* If AN is done, we're running */
1012                 if (err > 0) {
1013                         phydev->state = PHY_RUNNING;
1014                         netif_carrier_on(phydev->attached_dev);
1015                         phy_adjust_link(phydev);
1016
1017                 } else if (0 == phydev->link_timeout--)
1018                         needs_aneg = true;
1019                 break;
1020         case PHY_NOLINK:
1021                 if (phy_interrupt_is_valid(phydev))
1022                         break;
1023
1024                 err = phy_read_status(phydev);
1025                 if (err)
1026                         break;
1027
1028                 if (phydev->link) {
1029                         if (AUTONEG_ENABLE == phydev->autoneg) {
1030                                 err = phy_aneg_done(phydev);
1031                                 if (err < 0)
1032                                         break;
1033
1034                                 if (!err) {
1035                                         phydev->state = PHY_AN;
1036                                         phydev->link_timeout = PHY_AN_TIMEOUT;
1037                                         break;
1038                                 }
1039                         }
1040                         phydev->state = PHY_RUNNING;
1041                         netif_carrier_on(phydev->attached_dev);
1042                         phy_adjust_link(phydev);
1043                 }
1044                 break;
1045         case PHY_FORCING:
1046                 err = genphy_update_link(phydev);
1047                 if (err)
1048                         break;
1049
1050                 if (phydev->link) {
1051                         phydev->state = PHY_RUNNING;
1052                         netif_carrier_on(phydev->attached_dev);
1053                 } else {
1054                         if (0 == phydev->link_timeout--)
1055                                 needs_aneg = true;
1056                 }
1057
1058                 phy_adjust_link(phydev);
1059                 break;
1060         case PHY_RUNNING:
1061                 /* Only register a CHANGE if we are polling and link changed
1062                  * since latest checking.
1063                  */
1064                 if (phydev->irq == PHY_POLL) {
1065                         old_link = phydev->link;
1066                         err = phy_read_status(phydev);
1067                         if (err)
1068                                 break;
1069
1070                         if (old_link != phydev->link)
1071                                 phydev->state = PHY_CHANGELINK;
1072                 }
1073                 /*
1074                  * Failsafe: check that nobody set phydev->link=0 between two
1075                  * poll cycles, otherwise we won't leave RUNNING state as long
1076                  * as link remains down.
1077                  */
1078                 if (!phydev->link && phydev->state == PHY_RUNNING) {
1079                         phydev->state = PHY_CHANGELINK;
1080                         phydev_err(phydev, "no link in PHY_RUNNING\n");
1081                 }
1082                 break;
1083         case PHY_CHANGELINK:
1084                 err = phy_read_status(phydev);
1085                 if (err)
1086                         break;
1087
1088                 if (phydev->link) {
1089                         phydev->state = PHY_RUNNING;
1090                         netif_carrier_on(phydev->attached_dev);
1091                 } else {
1092                         phydev->state = PHY_NOLINK;
1093                         netif_carrier_off(phydev->attached_dev);
1094                 }
1095
1096                 phy_adjust_link(phydev);
1097
1098                 if (phy_interrupt_is_valid(phydev))
1099                         err = phy_config_interrupt(phydev,
1100                                                    PHY_INTERRUPT_ENABLED);
1101                 break;
1102         case PHY_HALTED:
1103                 if (phydev->link) {
1104                         phydev->link = 0;
1105                         netif_carrier_off(phydev->attached_dev);
1106                         phy_adjust_link(phydev);
1107                         do_suspend = true;
1108                 }
1109                 break;
1110         case PHY_RESUMING:
1111                 if (AUTONEG_ENABLE == phydev->autoneg) {
1112                         err = phy_aneg_done(phydev);
1113                         if (err < 0)
1114                                 break;
1115
1116                         /* err > 0 if AN is done.
1117                          * Otherwise, it's 0, and we're  still waiting for AN
1118                          */
1119                         if (err > 0) {
1120                                 err = phy_read_status(phydev);
1121                                 if (err)
1122                                         break;
1123
1124                                 if (phydev->link) {
1125                                         phydev->state = PHY_RUNNING;
1126                                         netif_carrier_on(phydev->attached_dev);
1127                                 } else  {
1128                                         phydev->state = PHY_NOLINK;
1129                                 }
1130                                 phy_adjust_link(phydev);
1131                         } else {
1132                                 phydev->state = PHY_AN;
1133                                 phydev->link_timeout = PHY_AN_TIMEOUT;
1134                         }
1135                 } else {
1136                         err = phy_read_status(phydev);
1137                         if (err)
1138                                 break;
1139
1140                         if (phydev->link) {
1141                                 phydev->state = PHY_RUNNING;
1142                                 netif_carrier_on(phydev->attached_dev);
1143                         } else  {
1144                                 phydev->state = PHY_NOLINK;
1145                         }
1146                         phy_adjust_link(phydev);
1147                 }
1148                 break;
1149         }
1150
1151         mutex_unlock(&phydev->lock);
1152
1153         if (needs_aneg)
1154                 err = phy_start_aneg(phydev);
1155         else if (do_suspend)
1156                 phy_suspend(phydev);
1157
1158         if (err < 0)
1159                 phy_error(phydev);
1160
1161         phydev_dbg(phydev, "PHY state change %s -> %s\n",
1162                    phy_state_to_str(old_state),
1163                    phy_state_to_str(phydev->state));
1164
1165         /* Only re-schedule a PHY state machine change if we are polling the
1166          * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
1167          * between states from phy_mac_interrupt()
1168          */
1169         if (phydev->irq == PHY_POLL)
1170                 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
1171                                    PHY_STATE_TIME * HZ);
1172 }
1173
1174 /**
1175  * phy_mac_interrupt - MAC says the link has changed
1176  * @phydev: phy_device struct with changed link
1177  * @new_link: Link is Up/Down.
1178  *
1179  * Description: The MAC layer is able indicate there has been a change
1180  *   in the PHY link status. Set the new link status, and trigger the
1181  *   state machine, work a work queue.
1182  */
1183 void phy_mac_interrupt(struct phy_device *phydev, int new_link)
1184 {
1185         phydev->link = new_link;
1186
1187         /* Trigger a state machine change */
1188         queue_work(system_power_efficient_wq, &phydev->phy_queue);
1189 }
1190 EXPORT_SYMBOL(phy_mac_interrupt);
1191
1192 static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad,
1193                                     int addr)
1194 {
1195         /* Write the desired MMD Devad */
1196         bus->write(bus, addr, MII_MMD_CTRL, devad);
1197
1198         /* Write the desired MMD register address */
1199         bus->write(bus, addr, MII_MMD_DATA, prtad);
1200
1201         /* Select the Function : DATA with no post increment */
1202         bus->write(bus, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR));
1203 }
1204
1205 /**
1206  * phy_read_mmd_indirect - reads data from the MMD registers
1207  * @phydev: The PHY device bus
1208  * @prtad: MMD Address
1209  * @devad: MMD DEVAD
1210  *
1211  * Description: it reads data from the MMD registers (clause 22 to access to
1212  * clause 45) of the specified phy address.
1213  * To read these register we have:
1214  * 1) Write reg 13 // DEVAD
1215  * 2) Write reg 14 // MMD Address
1216  * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1217  * 3) Read  reg 14 // Read MMD data
1218  */
1219 int phy_read_mmd_indirect(struct phy_device *phydev, int prtad, int devad)
1220 {
1221         struct phy_driver *phydrv = phydev->drv;
1222         int addr = phydev->mdio.addr;
1223         int value = -1;
1224
1225         if (!phydrv->read_mmd_indirect) {
1226                 struct mii_bus *bus = phydev->mdio.bus;
1227
1228                 mutex_lock(&bus->mdio_lock);
1229                 mmd_phy_indirect(bus, prtad, devad, addr);
1230
1231                 /* Read the content of the MMD's selected register */
1232                 value = bus->read(bus, addr, MII_MMD_DATA);
1233                 mutex_unlock(&bus->mdio_lock);
1234         } else {
1235                 value = phydrv->read_mmd_indirect(phydev, prtad, devad, addr);
1236         }
1237         return value;
1238 }
1239 EXPORT_SYMBOL(phy_read_mmd_indirect);
1240
1241 /**
1242  * phy_write_mmd_indirect - writes data to the MMD registers
1243  * @phydev: The PHY device
1244  * @prtad: MMD Address
1245  * @devad: MMD DEVAD
1246  * @data: data to write in the MMD register
1247  *
1248  * Description: Write data from the MMD registers of the specified
1249  * phy address.
1250  * To write these register we have:
1251  * 1) Write reg 13 // DEVAD
1252  * 2) Write reg 14 // MMD Address
1253  * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1254  * 3) Write reg 14 // Write MMD data
1255  */
1256 void phy_write_mmd_indirect(struct phy_device *phydev, int prtad,
1257                                    int devad, u32 data)
1258 {
1259         struct phy_driver *phydrv = phydev->drv;
1260         int addr = phydev->mdio.addr;
1261
1262         if (!phydrv->write_mmd_indirect) {
1263                 struct mii_bus *bus = phydev->mdio.bus;
1264
1265                 mutex_lock(&bus->mdio_lock);
1266                 mmd_phy_indirect(bus, prtad, devad, addr);
1267
1268                 /* Write the data into MMD's selected register */
1269                 bus->write(bus, addr, MII_MMD_DATA, data);
1270                 mutex_unlock(&bus->mdio_lock);
1271         } else {
1272                 phydrv->write_mmd_indirect(phydev, prtad, devad, addr, data);
1273         }
1274 }
1275 EXPORT_SYMBOL(phy_write_mmd_indirect);
1276
1277 /**
1278  * phy_init_eee - init and check the EEE feature
1279  * @phydev: target phy_device struct
1280  * @clk_stop_enable: PHY may stop the clock during LPI
1281  *
1282  * Description: it checks if the Energy-Efficient Ethernet (EEE)
1283  * is supported by looking at the MMD registers 3.20 and 7.60/61
1284  * and it programs the MMD register 3.0 setting the "Clock stop enable"
1285  * bit if required.
1286  */
1287 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1288 {
1289         /* According to 802.3az,the EEE is supported only in full duplex-mode.
1290          * Also EEE feature is active when core is operating with MII, GMII
1291          * or RGMII (all kinds). Internal PHYs are also allowed to proceed and
1292          * should return an error if they do not support EEE.
1293          */
1294         if ((phydev->duplex == DUPLEX_FULL) &&
1295             ((phydev->interface == PHY_INTERFACE_MODE_MII) ||
1296             (phydev->interface == PHY_INTERFACE_MODE_GMII) ||
1297              phy_interface_is_rgmii(phydev) ||
1298              phy_is_internal(phydev))) {
1299                 int eee_lp, eee_cap, eee_adv;
1300                 u32 lp, cap, adv;
1301                 int status;
1302
1303                 /* Read phy status to properly get the right settings */
1304                 status = phy_read_status(phydev);
1305                 if (status)
1306                         return status;
1307
1308                 /* First check if the EEE ability is supported */
1309                 eee_cap = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE,
1310                                                 MDIO_MMD_PCS);
1311                 if (eee_cap <= 0)
1312                         goto eee_exit_err;
1313
1314                 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1315                 if (!cap)
1316                         goto eee_exit_err;
1317
1318                 /* Check which link settings negotiated and verify it in
1319                  * the EEE advertising registers.
1320                  */
1321                 eee_lp = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE,
1322                                                MDIO_MMD_AN);
1323                 if (eee_lp <= 0)
1324                         goto eee_exit_err;
1325
1326                 eee_adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV,
1327                                                 MDIO_MMD_AN);
1328                 if (eee_adv <= 0)
1329                         goto eee_exit_err;
1330
1331                 adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
1332                 lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
1333                 if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv))
1334                         goto eee_exit_err;
1335
1336                 if (clk_stop_enable) {
1337                         /* Configure the PHY to stop receiving xMII
1338                          * clock while it is signaling LPI.
1339                          */
1340                         int val = phy_read_mmd_indirect(phydev, MDIO_CTRL1,
1341                                                         MDIO_MMD_PCS);
1342                         if (val < 0)
1343                                 return val;
1344
1345                         val |= MDIO_PCS_CTRL1_CLKSTOP_EN;
1346                         phy_write_mmd_indirect(phydev, MDIO_CTRL1,
1347                                                MDIO_MMD_PCS, val);
1348                 }
1349
1350                 return 0; /* EEE supported */
1351         }
1352 eee_exit_err:
1353         return -EPROTONOSUPPORT;
1354 }
1355 EXPORT_SYMBOL(phy_init_eee);
1356
1357 /**
1358  * phy_get_eee_err - report the EEE wake error count
1359  * @phydev: target phy_device struct
1360  *
1361  * Description: it is to report the number of time where the PHY
1362  * failed to complete its normal wake sequence.
1363  */
1364 int phy_get_eee_err(struct phy_device *phydev)
1365 {
1366         return phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_WK_ERR, MDIO_MMD_PCS);
1367 }
1368 EXPORT_SYMBOL(phy_get_eee_err);
1369
1370 /**
1371  * phy_ethtool_get_eee - get EEE supported and status
1372  * @phydev: target phy_device struct
1373  * @data: ethtool_eee data
1374  *
1375  * Description: it reportes the Supported/Advertisement/LP Advertisement
1376  * capabilities.
1377  */
1378 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1379 {
1380         int val;
1381
1382         /* Get Supported EEE */
1383         val = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE, MDIO_MMD_PCS);
1384         if (val < 0)
1385                 return val;
1386         data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1387
1388         /* Get advertisement EEE */
1389         val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN);
1390         if (val < 0)
1391                 return val;
1392         data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1393
1394         /* Get LP advertisement EEE */
1395         val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE, MDIO_MMD_AN);
1396         if (val < 0)
1397                 return val;
1398         data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1399
1400         return 0;
1401 }
1402 EXPORT_SYMBOL(phy_ethtool_get_eee);
1403
1404 /**
1405  * phy_ethtool_set_eee - set EEE supported and status
1406  * @phydev: target phy_device struct
1407  * @data: ethtool_eee data
1408  *
1409  * Description: it is to program the Advertisement EEE register.
1410  */
1411 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1412 {
1413         int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised);
1414
1415         /* Mask prohibited EEE modes */
1416         val &= ~phydev->eee_broken_modes;
1417
1418         phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, val);
1419
1420         return 0;
1421 }
1422 EXPORT_SYMBOL(phy_ethtool_set_eee);
1423
1424 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1425 {
1426         if (phydev->drv->set_wol)
1427                 return phydev->drv->set_wol(phydev, wol);
1428
1429         return -EOPNOTSUPP;
1430 }
1431 EXPORT_SYMBOL(phy_ethtool_set_wol);
1432
1433 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1434 {
1435         if (phydev->drv->get_wol)
1436                 phydev->drv->get_wol(phydev, wol);
1437 }
1438 EXPORT_SYMBOL(phy_ethtool_get_wol);
1439
1440 int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1441                                    struct ethtool_link_ksettings *cmd)
1442 {
1443         struct phy_device *phydev = ndev->phydev;
1444
1445         if (!phydev)
1446                 return -ENODEV;
1447
1448         return phy_ethtool_ksettings_get(phydev, cmd);
1449 }
1450 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1451
1452 int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1453                                    const struct ethtool_link_ksettings *cmd)
1454 {
1455         struct phy_device *phydev = ndev->phydev;
1456
1457         if (!phydev)
1458                 return -ENODEV;
1459
1460         return phy_ethtool_ksettings_set(phydev, cmd);
1461 }
1462 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1463
1464 int phy_ethtool_nway_reset(struct net_device *ndev)
1465 {
1466         struct phy_device *phydev = ndev->phydev;
1467
1468         if (!phydev)
1469                 return -ENODEV;
1470
1471         return genphy_restart_aneg(phydev);
1472 }
1473 EXPORT_SYMBOL(phy_ethtool_nway_reset);