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