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/timer.h>
  33 #include <linux/workqueue.h>
  34 #include <linux/mdio.h>
  35 #include <linux/io.h>
  36 #include <linux/uaccess.h>
  37 #include <linux/atomic.h>
  38
  39 #include <asm/irq.h>
  40
  41 static const char *phy_speed_to_str(int speed)
  42 {
  43         switch (speed) {
  44         case SPEED_10:
  45                 return "10Mbps";
  46         case SPEED_100:
  47                 return "100Mbps";
  48         case SPEED_1000:
  49                 return "1Gbps";
  50         case SPEED_2500:
  51                 return "2.5Gbps";
  52         case SPEED_10000:
  53                 return "10Gbps";
  54         case SPEED_UNKNOWN:
  55                 return "Unknown";
  56         default:
  57                 return "Unsupported (update phy.c)";
  58         }
  59 }
  60
  61 #define PHY_STATE_STR(_state)                   \
  62         case PHY_##_state:                      \
  63                 return __stringify(_state);     \
  64
  65 static const char *phy_state_to_str(enum phy_state st)
  66 {
  67         switch (st) {
  68         PHY_STATE_STR(DOWN)
  69         PHY_STATE_STR(STARTING)
  70         PHY_STATE_STR(READY)
  71         PHY_STATE_STR(PENDING)
  72         PHY_STATE_STR(UP)
  73         PHY_STATE_STR(AN)
  74         PHY_STATE_STR(RUNNING)
  75         PHY_STATE_STR(NOLINK)
  76         PHY_STATE_STR(FORCING)
  77         PHY_STATE_STR(CHANGELINK)
  78         PHY_STATE_STR(HALTED)
  79         PHY_STATE_STR(RESUMING)
  80         }
  81
  82         return NULL;
  83 }
  84
  85
  86 /**
  87  * phy_print_status - Convenience function to print out the current phy status
  88  * @phydev: the phy_device struct
  89  */
  90 void phy_print_status(struct phy_device *phydev)
  91 {
  92         if (phydev->link) {
  93                 netdev_info(phydev->attached_dev,
  94                         "Link is Up - %s/%s - flow control %s\n",
  95                         phy_speed_to_str(phydev->speed),
  96                         DUPLEX_FULL == phydev->duplex ? "Full" : "Half",
  97                         phydev->pause ? "rx/tx" : "off");
  98         } else  {
  99                 netdev_info(phydev->attached_dev, "Link is Down\n");
 100         }
 101 }
 102 EXPORT_SYMBOL(phy_print_status);
 103
 104 /**
 105  * phy_clear_interrupt - Ack the phy device's interrupt
 106  * @phydev: the phy_device struct
 107  *
 108  * If the @phydev driver has an ack_interrupt function, call it to
 109  * ack and clear the phy device's interrupt.
 110  *
 111  * Returns 0 on success or < 0 on error.
 112  */
 113 static int phy_clear_interrupt(struct phy_device *phydev)
 114 {
 115         if (phydev->drv->ack_interrupt)
 116                 return phydev->drv->ack_interrupt(phydev);
 117
 118         return 0;
 119 }
 120
 121 /**
 122  * phy_config_interrupt - configure the PHY device for the requested interrupts
 123  * @phydev: the phy_device struct
 124  * @interrupts: interrupt flags to configure for this @phydev
 125  *
 126  * Returns 0 on success or < 0 on error.
 127  */
 128 static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
 129 {
 130         phydev->interrupts = interrupts;
 131         if (phydev->drv->config_intr)
 132                 return phydev->drv->config_intr(phydev);
 133
 134         return 0;
 135 }
 136
 137
 138 /**
 139  * phy_aneg_done - return auto-negotiation status
 140  * @phydev: target phy_device struct
 141  *
 142  * Description: Return the auto-negotiation status from this @phydev
 143  * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
 144  * is still pending.
 145  */
 146 static inline int phy_aneg_done(struct phy_device *phydev)
 147 {
 148         if (phydev->drv->aneg_done)
 149                 return phydev->drv->aneg_done(phydev);
 150
 151         return genphy_aneg_done(phydev);
 152 }
 153
 154 /* A structure for mapping a particular speed and duplex
 155  * combination to a particular SUPPORTED and ADVERTISED value
 156  */
 157 struct phy_setting {
 158         int speed;
 159         int duplex;
 160         u32 setting;
 161 };
 162
 163 /* A mapping of all SUPPORTED settings to speed/duplex */
 164 static const struct phy_setting settings[] = {
 165         {
 166                 .speed = SPEED_10000,
 167                 .duplex = DUPLEX_FULL,
 168                 .setting = SUPPORTED_10000baseKR_Full,
 169         },
 170         {
 171                 .speed = SPEED_10000,
 172                 .duplex = DUPLEX_FULL,
 173                 .setting = SUPPORTED_10000baseKX4_Full,
 174         },
 175         {
 176                 .speed = SPEED_10000,
 177                 .duplex = DUPLEX_FULL,
 178                 .setting = SUPPORTED_10000baseT_Full,
 179         },
 180         {
 181                 .speed = SPEED_2500,
 182                 .duplex = DUPLEX_FULL,
 183                 .setting = SUPPORTED_2500baseX_Full,
 184         },
 185         {
 186                 .speed = SPEED_1000,
 187                 .duplex = DUPLEX_FULL,
 188                 .setting = SUPPORTED_1000baseKX_Full,
 189         },
 190         {
 191                 .speed = SPEED_1000,
 192                 .duplex = DUPLEX_FULL,
 193                 .setting = SUPPORTED_1000baseT_Full,
 194         },
 195         {
 196                 .speed = SPEED_1000,
 197                 .duplex = DUPLEX_HALF,
 198                 .setting = SUPPORTED_1000baseT_Half,
 199         },
 200         {
 201                 .speed = SPEED_100,
 202                 .duplex = DUPLEX_FULL,
 203                 .setting = SUPPORTED_100baseT_Full,
 204         },
 205         {
 206                 .speed = SPEED_100,
 207                 .duplex = DUPLEX_HALF,
 208                 .setting = SUPPORTED_100baseT_Half,
 209         },
 210         {
 211                 .speed = SPEED_10,
 212                 .duplex = DUPLEX_FULL,
 213                 .setting = SUPPORTED_10baseT_Full,
 214         },
 215         {
 216                 .speed = SPEED_10,
 217                 .duplex = DUPLEX_HALF,
 218                 .setting = SUPPORTED_10baseT_Half,
 219         },
 220 };
 221
 222 #define MAX_NUM_SETTINGS ARRAY_SIZE(settings)
 223
 224 /**
 225  * phy_find_setting - find a PHY settings array entry that matches speed & duplex
 226  * @speed: speed to match
 227  * @duplex: duplex to match
 228  *
 229  * Description: Searches the settings array for the setting which
 230  *   matches the desired speed and duplex, and returns the index
 231  *   of that setting.  Returns the index of the last setting if
 232  *   none of the others match.
 233  */
 234 static inline unsigned int phy_find_setting(int speed, int duplex)
 235 {
 236         unsigned int idx = 0;
 237
 238         while (idx < ARRAY_SIZE(settings) &&
 239                (settings[idx].speed != speed || settings[idx].duplex != duplex))
 240                 idx++;
 241
 242         return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
 243 }
 244
 245 /**
 246  * phy_find_valid - find a PHY setting that matches the requested features mask
 247  * @idx: The first index in settings[] to search
 248  * @features: A mask of the valid settings
 249  *
 250  * Description: Returns the index of the first valid setting less
 251  *   than or equal to the one pointed to by idx, as determined by
 252  *   the mask in features.  Returns the index of the last setting
 253  *   if nothing else matches.
 254  */
 255 static inline unsigned int phy_find_valid(unsigned int idx, u32 features)
 256 {
 257         while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features))
 258                 idx++;
 259
 260         return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
 261 }
 262
 263 /**
 264  * phy_check_valid - check if there is a valid PHY setting which matches
 265  *                   speed, duplex, and feature mask
 266  * @speed: speed to match
 267  * @duplex: duplex to match
 268  * @features: A mask of the valid settings
 269  *
 270  * Description: Returns true if there is a valid setting, false otherwise.
 271  */
 272 static inline bool phy_check_valid(int speed, int duplex, u32 features)
 273 {
 274         unsigned int idx;
 275
 276         idx = phy_find_valid(phy_find_setting(speed, duplex), features);
 277
 278         return settings[idx].speed == speed && settings[idx].duplex == duplex &&
 279                 (settings[idx].setting & features);
 280 }
 281
 282 /**
 283  * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
 284  * @phydev: the target phy_device struct
 285  *
 286  * Description: Make sure the PHY is set to supported speeds and
 287  *   duplexes.  Drop down by one in this order:  1000/FULL,
 288  *   1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
 289  */
 290 static void phy_sanitize_settings(struct phy_device *phydev)
 291 {
 292         u32 features = phydev->supported;
 293         unsigned int idx;
 294
 295         /* Sanitize settings based on PHY capabilities */
 296         if ((features & SUPPORTED_Autoneg) == 0)
 297                 phydev->autoneg = AUTONEG_DISABLE;
 298
 299         idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
 300                         features);
 301
 302         phydev->speed = settings[idx].speed;
 303         phydev->duplex = settings[idx].duplex;
 304 }
 305
 306 /**
 307  * phy_ethtool_sset - generic ethtool sset function, handles all the details
 308  * @phydev: target phy_device struct
 309  * @cmd: ethtool_cmd
 310  *
 311  * A few notes about parameter checking:
 312  * - We don't set port or transceiver, so we don't care what they
 313  *   were set to.
 314  * - phy_start_aneg() will make sure forced settings are sane, and
 315  *   choose the next best ones from the ones selected, so we don't
 316  *   care if ethtool tries to give us bad values.
 317  */
 318 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
 319 {
 320         u32 speed = ethtool_cmd_speed(cmd);
 321
 322         if (cmd->phy_address != phydev->mdio.addr)
 323                 return -EINVAL;
 324
 325         /* We make sure that we don't pass unsupported values in to the PHY */
 326         cmd->advertising &= phydev->supported;
 327
 328         /* Verify the settings we care about. */
 329         if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
 330                 return -EINVAL;
 331
 332         if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
 333                 return -EINVAL;
 334
 335         if (cmd->autoneg == AUTONEG_DISABLE &&
 336             ((speed != SPEED_1000 &&
 337               speed != SPEED_100 &&
 338               speed != SPEED_10) ||
 339              (cmd->duplex != DUPLEX_HALF &&
 340               cmd->duplex != DUPLEX_FULL)))
 341                 return -EINVAL;
 342
 343         phydev->autoneg = cmd->autoneg;
 344
 345         phydev->speed = speed;
 346
 347         phydev->advertising = cmd->advertising;
 348
 349         if (AUTONEG_ENABLE == cmd->autoneg)
 350                 phydev->advertising |= ADVERTISED_Autoneg;
 351         else
 352                 phydev->advertising &= ~ADVERTISED_Autoneg;
 353
 354         phydev->duplex = cmd->duplex;
 355
 356         phydev->mdix = cmd->eth_tp_mdix_ctrl;
 357
 358         /* Restart the PHY */
 359         phy_start_aneg(phydev);
 360
 361         return 0;
 362 }
 363 EXPORT_SYMBOL(phy_ethtool_sset);
 364
 365 int phy_ethtool_ksettings_set(struct phy_device *phydev,
 366                               const struct ethtool_link_ksettings *cmd)
 367 {
 368         u8 autoneg = cmd->base.autoneg;
 369         u8 duplex = cmd->base.duplex;
 370         u32 speed = cmd->base.speed;
 371         u32 advertising;
 372
 373         if (cmd->base.phy_address != phydev->mdio.addr)
 374                 return -EINVAL;
 375
 376         ethtool_convert_link_mode_to_legacy_u32(&advertising,
 377                                                 cmd->link_modes.advertising);
 378
 379         /* We make sure that we don't pass unsupported values in to the PHY */
 380         advertising &= phydev->supported;
 381
 382         /* Verify the settings we care about. */
 383         if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
 384                 return -EINVAL;
 385
 386         if (autoneg == AUTONEG_ENABLE && advertising == 0)
 387                 return -EINVAL;
 388
 389         if (autoneg == AUTONEG_DISABLE &&
 390             ((speed != SPEED_1000 &&
 391               speed != SPEED_100 &&
 392               speed != SPEED_10) ||
 393              (duplex != DUPLEX_HALF &&
 394               duplex != DUPLEX_FULL)))
 395                 return -EINVAL;
 396
 397         phydev->autoneg = autoneg;
 398
 399         phydev->speed = speed;
 400
 401         phydev->advertising = advertising;
 402
 403         if (autoneg == AUTONEG_ENABLE)
 404                 phydev->advertising |= ADVERTISED_Autoneg;
 405         else
 406                 phydev->advertising &= ~ADVERTISED_Autoneg;
 407
 408         phydev->duplex = duplex;
 409
 410         phydev->mdix = cmd->base.eth_tp_mdix_ctrl;
 411
 412         /* Restart the PHY */
 413         phy_start_aneg(phydev);
 414
 415         return 0;
 416 }
 417 EXPORT_SYMBOL(phy_ethtool_ksettings_set);
 418
 419 int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
 420 {
 421         cmd->supported = phydev->supported;
 422
 423         cmd->advertising = phydev->advertising;
 424         cmd->lp_advertising = phydev->lp_advertising;
 425
 426         ethtool_cmd_speed_set(cmd, phydev->speed);
 427         cmd->duplex = phydev->duplex;
 428         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 429                 cmd->port = PORT_BNC;
 430         else
 431                 cmd->port = PORT_MII;
 432         cmd->phy_address = phydev->mdio.addr;
 433         cmd->transceiver = phy_is_internal(phydev) ?
 434                 XCVR_INTERNAL : XCVR_EXTERNAL;
 435         cmd->autoneg = phydev->autoneg;
 436         cmd->eth_tp_mdix_ctrl = phydev->mdix;
 437
 438         return 0;
 439 }
 440 EXPORT_SYMBOL(phy_ethtool_gset);
 441
 442 int phy_ethtool_ksettings_get(struct phy_device *phydev,
 443                               struct ethtool_link_ksettings *cmd)
 444 {
 445         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
 446                                                 phydev->supported);
 447
 448         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
 449                                                 phydev->advertising);
 450
 451         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
 452                                                 phydev->lp_advertising);
 453
 454         cmd->base.speed = phydev->speed;
 455         cmd->base.duplex = phydev->duplex;
 456         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 457                 cmd->base.port = PORT_BNC;
 458         else
 459                 cmd->base.port = PORT_MII;
 460
 461         cmd->base.phy_address = phydev->mdio.addr;
 462         cmd->base.autoneg = phydev->autoneg;
 463         cmd->base.eth_tp_mdix_ctrl = phydev->mdix;
 464
 465         return 0;
 466 }
 467 EXPORT_SYMBOL(phy_ethtool_ksettings_get);
 468
 469 /**
 470  * phy_mii_ioctl - generic PHY MII ioctl interface
 471  * @phydev: the phy_device struct
 472  * @ifr: &struct ifreq for socket ioctl's
 473  * @cmd: ioctl cmd to execute
 474  *
 475  * Note that this function is currently incompatible with the
 476  * PHYCONTROL layer.  It changes registers without regard to
 477  * current state.  Use at own risk.
 478  */
 479 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
 480 {
 481         struct mii_ioctl_data *mii_data = if_mii(ifr);
 482         u16 val = mii_data->val_in;
 483         bool change_autoneg = false;
 484
 485         switch (cmd) {
 486         case SIOCGMIIPHY:
 487                 mii_data->phy_id = phydev->mdio.addr;
 488                 /* fall through */
 489
 490         case SIOCGMIIREG:
 491                 mii_data->val_out = mdiobus_read(phydev->mdio.bus,
 492                                                  mii_data->phy_id,
 493                                                  mii_data->reg_num);
 494                 return 0;
 495
 496         case SIOCSMIIREG:
 497                 if (mii_data->phy_id == phydev->mdio.addr) {
 498                         switch (mii_data->reg_num) {
 499                         case MII_BMCR:
 500                                 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
 501                                         if (phydev->autoneg == AUTONEG_ENABLE)
 502                                                 change_autoneg = true;
 503                                         phydev->autoneg = AUTONEG_DISABLE;
 504                                         if (val & BMCR_FULLDPLX)
 505                                                 phydev->duplex = DUPLEX_FULL;
 506                                         else
 507                                                 phydev->duplex = DUPLEX_HALF;
 508                                         if (val & BMCR_SPEED1000)
 509                                                 phydev->speed = SPEED_1000;
 510                                         else if (val & BMCR_SPEED100)
 511                                                 phydev->speed = SPEED_100;
 512                                         else phydev->speed = SPEED_10;
 513                                 }
 514                                 else {
 515                                         if (phydev->autoneg == AUTONEG_DISABLE)
 516                                                 change_autoneg = true;
 517                                         phydev->autoneg = AUTONEG_ENABLE;
 518                                 }
 519                                 break;
 520                         case MII_ADVERTISE:
 521                                 phydev->advertising = mii_adv_to_ethtool_adv_t(val);
 522                                 change_autoneg = true;
 523                                 break;
 524                         default:
 525                                 /* do nothing */
 526                                 break;
 527                         }
 528                 }
 529
 530                 mdiobus_write(phydev->mdio.bus, mii_data->phy_id,
 531                               mii_data->reg_num, val);
 532
 533                 if (mii_data->phy_id == phydev->mdio.addr &&
 534                     mii_data->reg_num == MII_BMCR &&
 535                     val & BMCR_RESET)
 536                         return phy_init_hw(phydev);
 537
 538                 if (change_autoneg)
 539                         return phy_start_aneg(phydev);
 540
 541                 return 0;
 542
 543         case SIOCSHWTSTAMP:
 544                 if (phydev->drv->hwtstamp)
 545                         return phydev->drv->hwtstamp(phydev, ifr);
 546                 /* fall through */
 547
 548         default:
 549                 return -EOPNOTSUPP;
 550         }
 551 }
 552 EXPORT_SYMBOL(phy_mii_ioctl);
 553
 554 /**
 555  * phy_start_aneg - start auto-negotiation for this PHY device
 556  * @phydev: the phy_device struct
 557  *
 558  * Description: Sanitizes the settings (if we're not autonegotiating
 559  *   them), and then calls the driver's config_aneg function.
 560  *   If the PHYCONTROL Layer is operating, we change the state to
 561  *   reflect the beginning of Auto-negotiation or forcing.
 562  */
 563 int phy_start_aneg(struct phy_device *phydev)
 564 {
 565         int err;
 566
 567         mutex_lock(&phydev->lock);
 568
 569         if (AUTONEG_DISABLE == phydev->autoneg)
 570                 phy_sanitize_settings(phydev);
 571
 572         /* Invalidate LP advertising flags */
 573         phydev->lp_advertising = 0;
 574
 575         err = phydev->drv->config_aneg(phydev);
 576         if (err < 0)
 577                 goto out_unlock;
 578
 579         if (phydev->state != PHY_HALTED) {
 580                 if (AUTONEG_ENABLE == phydev->autoneg) {
 581                         phydev->state = PHY_AN;
 582                         phydev->link_timeout = PHY_AN_TIMEOUT;
 583                 } else {
 584                         phydev->state = PHY_FORCING;
 585                         phydev->link_timeout = PHY_FORCE_TIMEOUT;
 586                 }
 587         }
 588
 589 out_unlock:
 590         mutex_unlock(&phydev->lock);
 591         return err;
 592 }
 593 EXPORT_SYMBOL(phy_start_aneg);
 594
 595 /**
 596  * phy_start_machine - start PHY state machine tracking
 597  * @phydev: the phy_device struct
 598  *
 599  * Description: The PHY infrastructure can run a state machine
 600  *   which tracks whether the PHY is starting up, negotiating,
 601  *   etc.  This function starts the timer which tracks the state
 602  *   of the PHY.  If you want to maintain your own state machine,
 603  *   do not call this function.
 604  */
 605 void phy_start_machine(struct phy_device *phydev)
 606 {
 607         queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
 608 }
 609
 610 /**
 611  * phy_trigger_machine - trigger the state machine to run
 612  *
 613  * @phydev: the phy_device struct
 614  *
 615  * Description: There has been a change in state which requires that the
 616  *   state machine runs.
 617  */
 618
 619 static void phy_trigger_machine(struct phy_device *phydev)
 620 {
 621         cancel_delayed_work_sync(&phydev->state_queue);
 622         queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
 623 }
 624
 625 /**
 626  * phy_stop_machine - stop the PHY state machine tracking
 627  * @phydev: target phy_device struct
 628  *
 629  * Description: Stops the state machine timer, sets the state to UP
 630  *   (unless it wasn't up yet). This function must be called BEFORE
 631  *   phy_detach.
 632  */
 633 void phy_stop_machine(struct phy_device *phydev)
 634 {
 635         cancel_delayed_work_sync(&phydev->state_queue);
 636
 637         mutex_lock(&phydev->lock);
 638         if (phydev->state > PHY_UP)
 639                 phydev->state = PHY_UP;
 640         mutex_unlock(&phydev->lock);
 641 }
 642
 643 /**
 644  * phy_error - enter HALTED state for this PHY device
 645  * @phydev: target phy_device struct
 646  *
 647  * Moves the PHY to the HALTED state in response to a read
 648  * or write error, and tells the controller the link is down.
 649  * Must not be called from interrupt context, or while the
 650  * phydev->lock is held.
 651  */
 652 static void phy_error(struct phy_device *phydev)
 653 {
 654         mutex_lock(&phydev->lock);
 655         phydev->state = PHY_HALTED;
 656         mutex_unlock(&phydev->lock);
 657
 658         phy_trigger_machine(phydev);
 659 }
 660
 661 /**
 662  * phy_interrupt - PHY interrupt handler
 663  * @irq: interrupt line
 664  * @phy_dat: phy_device pointer
 665  *
 666  * Description: When a PHY interrupt occurs, the handler disables
 667  * interrupts, and schedules a work task to clear the interrupt.
 668  */
 669 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
 670 {
 671         struct phy_device *phydev = phy_dat;
 672
 673         if (PHY_HALTED == phydev->state)
 674                 return IRQ_NONE;                /* It can't be ours.  */
 675
 676         /* The MDIO bus is not allowed to be written in interrupt
 677          * context, so we need to disable the irq here.  A work
 678          * queue will write the PHY to disable and clear the
 679          * interrupt, and then reenable the irq line.
 680          */
 681         disable_irq_nosync(irq);
 682         atomic_inc(&phydev->irq_disable);
 683
 684         queue_work(system_power_efficient_wq, &phydev->phy_queue);
 685
 686         return IRQ_HANDLED;
 687 }
 688
 689 /**
 690  * phy_enable_interrupts - Enable the interrupts from the PHY side
 691  * @phydev: target phy_device struct
 692  */
 693 static int phy_enable_interrupts(struct phy_device *phydev)
 694 {
 695         int err = phy_clear_interrupt(phydev);
 696
 697         if (err < 0)
 698                 return err;
 699
 700         return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
 701 }
 702
 703 /**
 704  * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
 705  * @phydev: target phy_device struct
 706  */
 707 static int phy_disable_interrupts(struct phy_device *phydev)
 708 {
 709         int err;
 710
 711         /* Disable PHY interrupts */
 712         err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 713         if (err)
 714                 goto phy_err;
 715
 716         /* Clear the interrupt */
 717         err = phy_clear_interrupt(phydev);
 718         if (err)
 719                 goto phy_err;
 720
 721         return 0;
 722
 723 phy_err:
 724         phy_error(phydev);
 725
 726         return err;
 727 }
 728
 729 /**
 730  * phy_start_interrupts - request and enable interrupts for a PHY device
 731  * @phydev: target phy_device struct
 732  *
 733  * Description: Request the interrupt for the given PHY.
 734  *   If this fails, then we set irq to PHY_POLL.
 735  *   Otherwise, we enable the interrupts in the PHY.
 736  *   This should only be called with a valid IRQ number.
 737  *   Returns 0 on success or < 0 on error.
 738  */
 739 int phy_start_interrupts(struct phy_device *phydev)
 740 {
 741         atomic_set(&phydev->irq_disable, 0);
 742         if (request_irq(phydev->irq, phy_interrupt,
 743                                 IRQF_SHARED,
 744                                 "phy_interrupt",
 745                                 phydev) < 0) {
 746                 pr_warn("%s: Can't get IRQ %d (PHY)\n",
 747                         phydev->mdio.bus->name, phydev->irq);
 748                 phydev->irq = PHY_POLL;
 749                 return 0;
 750         }
 751
 752         return phy_enable_interrupts(phydev);
 753 }
 754 EXPORT_SYMBOL(phy_start_interrupts);
 755
 756 /**
 757  * phy_stop_interrupts - disable interrupts from a PHY device
 758  * @phydev: target phy_device struct
 759  */
 760 int phy_stop_interrupts(struct phy_device *phydev)
 761 {
 762         int err = phy_disable_interrupts(phydev);
 763
 764         if (err)
 765                 phy_error(phydev);
 766
 767         free_irq(phydev->irq, phydev);
 768
 769         /* Cannot call flush_scheduled_work() here as desired because
 770          * of rtnl_lock(), but we do not really care about what would
 771          * be done, except from enable_irq(), so cancel any work
 772          * possibly pending and take care of the matter below.
 773          */
 774         cancel_work_sync(&phydev->phy_queue);
 775         /* If work indeed has been cancelled, disable_irq() will have
 776          * been left unbalanced from phy_interrupt() and enable_irq()
 777          * has to be called so that other devices on the line work.
 778          */
 779         while (atomic_dec_return(&phydev->irq_disable) >= 0)
 780                 enable_irq(phydev->irq);
 781
 782         return err;
 783 }
 784 EXPORT_SYMBOL(phy_stop_interrupts);
 785
 786 /**
 787  * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes
 788  * @work: work_struct that describes the work to be done
 789  */
 790 void phy_change(struct work_struct *work)
 791 {
 792         struct phy_device *phydev =
 793                 container_of(work, struct phy_device, phy_queue);
 794
 795         if (phy_interrupt_is_valid(phydev)) {
 796                 if (phydev->drv->did_interrupt &&
 797                     !phydev->drv->did_interrupt(phydev))
 798                         goto ignore;
 799
 800                 if (phy_disable_interrupts(phydev))
 801                         goto phy_err;
 802         }
 803
 804         mutex_lock(&phydev->lock);
 805         if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
 806                 phydev->state = PHY_CHANGELINK;
 807         mutex_unlock(&phydev->lock);
 808
 809         if (phy_interrupt_is_valid(phydev)) {
 810                 atomic_dec(&phydev->irq_disable);
 811                 enable_irq(phydev->irq);
 812
 813                 /* Reenable interrupts */
 814                 if (PHY_HALTED != phydev->state &&
 815                     phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED))
 816                         goto irq_enable_err;
 817         }
 818
 819         /* reschedule state queue work to run as soon as possible */
 820         phy_trigger_machine(phydev);
 821         return;
 822
 823 ignore:
 824         atomic_dec(&phydev->irq_disable);
 825         enable_irq(phydev->irq);
 826         return;
 827
 828 irq_enable_err:
 829         disable_irq(phydev->irq);
 830         atomic_inc(&phydev->irq_disable);
 831 phy_err:
 832         phy_error(phydev);
 833 }
 834
 835 /**
 836  * phy_stop - Bring down the PHY link, and stop checking the status
 837  * @phydev: target phy_device struct
 838  */
 839 void phy_stop(struct phy_device *phydev)
 840 {
 841         mutex_lock(&phydev->lock);
 842
 843         if (PHY_HALTED == phydev->state)
 844                 goto out_unlock;
 845
 846         if (phy_interrupt_is_valid(phydev)) {
 847                 /* Disable PHY Interrupts */
 848                 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 849
 850                 /* Clear any pending interrupts */
 851                 phy_clear_interrupt(phydev);
 852         }
 853
 854         phydev->state = PHY_HALTED;
 855
 856 out_unlock:
 857         mutex_unlock(&phydev->lock);
 858
 859         /* Cannot call flush_scheduled_work() here as desired because
 860          * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
 861          * will not reenable interrupts.
 862          */
 863 }
 864 EXPORT_SYMBOL(phy_stop);
 865
 866 /**
 867  * phy_start - start or restart a PHY device
 868  * @phydev: target phy_device struct
 869  *
 870  * Description: Indicates the attached device's readiness to
 871  *   handle PHY-related work.  Used during startup to start the
 872  *   PHY, and after a call to phy_stop() to resume operation.
 873  *   Also used to indicate the MDIO bus has cleared an error
 874  *   condition.
 875  */
 876 void phy_start(struct phy_device *phydev)
 877 {
 878         bool do_resume = false;
 879         int err = 0;
 880
 881         mutex_lock(&phydev->lock);
 882
 883         switch (phydev->state) {
 884         case PHY_STARTING:
 885                 phydev->state = PHY_PENDING;
 886                 break;
 887         case PHY_READY:
 888                 phydev->state = PHY_UP;
 889                 break;
 890         case PHY_HALTED:
 891                 /* make sure interrupts are re-enabled for the PHY */
 892                 if (phydev->irq != PHY_POLL) {
 893                         err = phy_enable_interrupts(phydev);
 894                         if (err < 0)
 895                                 break;
 896                 }
 897
 898                 phydev->state = PHY_RESUMING;
 899                 do_resume = true;
 900                 break;
 901         default:
 902                 break;
 903         }
 904         mutex_unlock(&phydev->lock);
 905
 906         /* if phy was suspended, bring the physical link up again */
 907         if (do_resume)
 908                 phy_resume(phydev);
 909
 910         phy_trigger_machine(phydev);
 911 }
 912 EXPORT_SYMBOL(phy_start);
 913
 914 /**
 915  * phy_state_machine - Handle the state machine
 916  * @work: work_struct that describes the work to be done
 917  */
 918 void phy_state_machine(struct work_struct *work)
 919 {
 920         struct delayed_work *dwork = to_delayed_work(work);
 921         struct phy_device *phydev =
 922                         container_of(dwork, struct phy_device, state_queue);
 923         bool needs_aneg = false, do_suspend = false;
 924         enum phy_state old_state;
 925         int err = 0;
 926         int old_link;
 927
 928         mutex_lock(&phydev->lock);
 929
 930         old_state = phydev->state;
 931
 932         if (phydev->drv->link_change_notify)
 933                 phydev->drv->link_change_notify(phydev);
 934
 935         switch (phydev->state) {
 936         case PHY_DOWN:
 937         case PHY_STARTING:
 938         case PHY_READY:
 939         case PHY_PENDING:
 940                 break;
 941         case PHY_UP:
 942                 needs_aneg = true;
 943
 944                 phydev->link_timeout = PHY_AN_TIMEOUT;
 945
 946                 break;
 947         case PHY_AN:
 948                 err = phy_read_status(phydev);
 949                 if (err < 0)
 950                         break;
 951
 952                 /* If the link is down, give up on negotiation for now */
 953                 if (!phydev->link) {
 954                         phydev->state = PHY_NOLINK;
 955                         netif_carrier_off(phydev->attached_dev);
 956                         phydev->adjust_link(phydev->attached_dev);
 957                         break;
 958                 }
 959
 960                 /* Check if negotiation is done.  Break if there's an error */
 961                 err = phy_aneg_done(phydev);
 962                 if (err < 0)
 963                         break;
 964
 965                 /* If AN is done, we're running */
 966                 if (err > 0) {
 967                         phydev->state = PHY_RUNNING;
 968                         netif_carrier_on(phydev->attached_dev);
 969                         phydev->adjust_link(phydev->attached_dev);
 970
 971                 } else if (0 == phydev->link_timeout--)
 972                         needs_aneg = true;
 973                 break;
 974         case PHY_NOLINK:
 975                 if (phy_interrupt_is_valid(phydev))
 976                         break;
 977
 978                 err = phy_read_status(phydev);
 979                 if (err)
 980                         break;
 981
 982                 if (phydev->link) {
 983                         if (AUTONEG_ENABLE == phydev->autoneg) {
 984                                 err = phy_aneg_done(phydev);
 985                                 if (err < 0)
 986                                         break;
 987
 988                                 if (!err) {
 989                                         phydev->state = PHY_AN;
 990                                         phydev->link_timeout = PHY_AN_TIMEOUT;
 991                                         break;
 992                                 }
 993                         }
 994                         phydev->state = PHY_RUNNING;
 995                         netif_carrier_on(phydev->attached_dev);
 996                         phydev->adjust_link(phydev->attached_dev);
 997                 }
 998                 break;
 999         case PHY_FORCING:
1000                 err = genphy_update_link(phydev);
1001                 if (err)
1002                         break;
1003
1004                 if (phydev->link) {
1005                         phydev->state = PHY_RUNNING;
1006                         netif_carrier_on(phydev->attached_dev);
1007                 } else {
1008                         if (0 == phydev->link_timeout--)
1009                                 needs_aneg = true;
1010                 }
1011
1012                 phydev->adjust_link(phydev->attached_dev);
1013                 break;
1014         case PHY_RUNNING:
1015                 /* Only register a CHANGE if we are polling and link changed
1016                  * since latest checking.
1017                  */
1018                 if (phydev->irq == PHY_POLL) {
1019                         old_link = phydev->link;
1020                         err = phy_read_status(phydev);
1021                         if (err)
1022                                 break;
1023
1024                         if (old_link != phydev->link)
1025                                 phydev->state = PHY_CHANGELINK;
1026                 }
1027                 break;
1028         case PHY_CHANGELINK:
1029                 err = phy_read_status(phydev);
1030                 if (err)
1031                         break;
1032
1033                 if (phydev->link) {
1034                         phydev->state = PHY_RUNNING;
1035                         netif_carrier_on(phydev->attached_dev);
1036                 } else {
1037                         phydev->state = PHY_NOLINK;
1038                         netif_carrier_off(phydev->attached_dev);
1039                 }
1040
1041                 phydev->adjust_link(phydev->attached_dev);
1042
1043                 if (phy_interrupt_is_valid(phydev))
1044                         err = phy_config_interrupt(phydev,
1045                                                    PHY_INTERRUPT_ENABLED);
1046                 break;
1047         case PHY_HALTED:
1048                 if (phydev->link) {
1049                         phydev->link = 0;
1050                         netif_carrier_off(phydev->attached_dev);
1051                         phydev->adjust_link(phydev->attached_dev);
1052                         do_suspend = true;
1053                 }
1054                 break;
1055         case PHY_RESUMING:
1056                 if (AUTONEG_ENABLE == phydev->autoneg) {
1057                         err = phy_aneg_done(phydev);
1058                         if (err < 0)
1059                                 break;
1060
1061                         /* err > 0 if AN is done.
1062                          * Otherwise, it's 0, and we're  still waiting for AN
1063                          */
1064                         if (err > 0) {
1065                                 err = phy_read_status(phydev);
1066                                 if (err)
1067                                         break;
1068
1069                                 if (phydev->link) {
1070                                         phydev->state = PHY_RUNNING;
1071                                         netif_carrier_on(phydev->attached_dev);
1072                                 } else  {
1073                                         phydev->state = PHY_NOLINK;
1074                                 }
1075                                 phydev->adjust_link(phydev->attached_dev);
1076                         } else {
1077                                 phydev->state = PHY_AN;
1078                                 phydev->link_timeout = PHY_AN_TIMEOUT;
1079                         }
1080                 } else {
1081                         err = phy_read_status(phydev);
1082                         if (err)
1083                                 break;
1084
1085                         if (phydev->link) {
1086                                 phydev->state = PHY_RUNNING;
1087                                 netif_carrier_on(phydev->attached_dev);
1088                         } else  {
1089                                 phydev->state = PHY_NOLINK;
1090                         }
1091                         phydev->adjust_link(phydev->attached_dev);
1092                 }
1093                 break;
1094         }
1095
1096         mutex_unlock(&phydev->lock);
1097
1098         if (needs_aneg)
1099                 err = phy_start_aneg(phydev);
1100         else if (do_suspend)
1101                 phy_suspend(phydev);
1102
1103         if (err < 0)
1104                 phy_error(phydev);
1105
1106         phydev_dbg(phydev, "PHY state change %s -> %s\n",
1107                    phy_state_to_str(old_state),
1108                    phy_state_to_str(phydev->state));
1109
1110         /* Only re-schedule a PHY state machine change if we are polling the
1111          * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
1112          * between states from phy_mac_interrupt()
1113          */
1114         if (phydev->irq == PHY_POLL)
1115                 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
1116                                    PHY_STATE_TIME * HZ);
1117 }
1118
1119 void phy_mac_interrupt(struct phy_device *phydev, int new_link)
1120 {
1121         phydev->link = new_link;
1122
1123         /* Trigger a state machine change */
1124         queue_work(system_power_efficient_wq, &phydev->phy_queue);
1125 }
1126 EXPORT_SYMBOL(phy_mac_interrupt);
1127
1128 static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad,
1129                                     int addr)
1130 {
1131         /* Write the desired MMD Devad */
1132         bus->write(bus, addr, MII_MMD_CTRL, devad);
1133
1134         /* Write the desired MMD register address */
1135         bus->write(bus, addr, MII_MMD_DATA, prtad);
1136
1137         /* Select the Function : DATA with no post increment */
1138         bus->write(bus, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR));
1139 }
1140
1141 /**
1142  * phy_read_mmd_indirect - reads data from the MMD registers
1143  * @phydev: The PHY device bus
1144  * @prtad: MMD Address
1145  * @devad: MMD DEVAD
1146  *
1147  * Description: it reads data from the MMD registers (clause 22 to access to
1148  * clause 45) of the specified phy address.
1149  * To read these register we have:
1150  * 1) Write reg 13 // DEVAD
1151  * 2) Write reg 14 // MMD Address
1152  * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1153  * 3) Read  reg 14 // Read MMD data
1154  */
1155 int phy_read_mmd_indirect(struct phy_device *phydev, int prtad, int devad)
1156 {
1157         struct phy_driver *phydrv = phydev->drv;
1158         int addr = phydev->mdio.addr;
1159         int value = -1;
1160
1161         if (!phydrv->read_mmd_indirect) {
1162                 struct mii_bus *bus = phydev->mdio.bus;
1163
1164                 mutex_lock(&bus->mdio_lock);
1165                 mmd_phy_indirect(bus, prtad, devad, addr);
1166
1167                 /* Read the content of the MMD's selected register */
1168                 value = bus->read(bus, addr, MII_MMD_DATA);
1169                 mutex_unlock(&bus->mdio_lock);
1170         } else {
1171                 value = phydrv->read_mmd_indirect(phydev, prtad, devad, addr);
1172         }
1173         return value;
1174 }
1175 EXPORT_SYMBOL(phy_read_mmd_indirect);
1176
1177 /**
1178  * phy_write_mmd_indirect - writes data to the MMD registers
1179  * @phydev: The PHY device
1180  * @prtad: MMD Address
1181  * @devad: MMD DEVAD
1182  * @data: data to write in the MMD register
1183  *
1184  * Description: Write data from the MMD registers of the specified
1185  * phy address.
1186  * To write these register we have:
1187  * 1) Write reg 13 // DEVAD
1188  * 2) Write reg 14 // MMD Address
1189  * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1190  * 3) Write reg 14 // Write MMD data
1191  */
1192 void phy_write_mmd_indirect(struct phy_device *phydev, int prtad,
1193                                    int devad, u32 data)
1194 {
1195         struct phy_driver *phydrv = phydev->drv;
1196         int addr = phydev->mdio.addr;
1197
1198         if (!phydrv->write_mmd_indirect) {
1199                 struct mii_bus *bus = phydev->mdio.bus;
1200
1201                 mutex_lock(&bus->mdio_lock);
1202                 mmd_phy_indirect(bus, prtad, devad, addr);
1203
1204                 /* Write the data into MMD's selected register */
1205                 bus->write(bus, addr, MII_MMD_DATA, data);
1206                 mutex_unlock(&bus->mdio_lock);
1207         } else {
1208                 phydrv->write_mmd_indirect(phydev, prtad, devad, addr, data);
1209         }
1210 }
1211 EXPORT_SYMBOL(phy_write_mmd_indirect);
1212
1213 /**
1214  * phy_init_eee - init and check the EEE feature
1215  * @phydev: target phy_device struct
1216  * @clk_stop_enable: PHY may stop the clock during LPI
1217  *
1218  * Description: it checks if the Energy-Efficient Ethernet (EEE)
1219  * is supported by looking at the MMD registers 3.20 and 7.60/61
1220  * and it programs the MMD register 3.0 setting the "Clock stop enable"
1221  * bit if required.
1222  */
1223 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1224 {
1225         /* According to 802.3az,the EEE is supported only in full duplex-mode.
1226          * Also EEE feature is active when core is operating with MII, GMII
1227          * or RGMII (all kinds). Internal PHYs are also allowed to proceed and
1228          * should return an error if they do not support EEE.
1229          */
1230         if ((phydev->duplex == DUPLEX_FULL) &&
1231             ((phydev->interface == PHY_INTERFACE_MODE_MII) ||
1232             (phydev->interface == PHY_INTERFACE_MODE_GMII) ||
1233              phy_interface_is_rgmii(phydev) ||
1234              phy_is_internal(phydev))) {
1235                 int eee_lp, eee_cap, eee_adv;
1236                 u32 lp, cap, adv;
1237                 int status;
1238
1239                 /* Read phy status to properly get the right settings */
1240                 status = phy_read_status(phydev);
1241                 if (status)
1242                         return status;
1243
1244                 /* First check if the EEE ability is supported */
1245                 eee_cap = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE,
1246                                                 MDIO_MMD_PCS);
1247                 if (eee_cap <= 0)
1248                         goto eee_exit_err;
1249
1250                 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1251                 if (!cap)
1252                         goto eee_exit_err;
1253
1254                 /* Check which link settings negotiated and verify it in
1255                  * the EEE advertising registers.
1256                  */
1257                 eee_lp = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE,
1258                                                MDIO_MMD_AN);
1259                 if (eee_lp <= 0)
1260                         goto eee_exit_err;
1261
1262                 eee_adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV,
1263                                                 MDIO_MMD_AN);
1264                 if (eee_adv <= 0)
1265                         goto eee_exit_err;
1266
1267                 adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
1268                 lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
1269                 if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv))
1270                         goto eee_exit_err;
1271
1272                 if (clk_stop_enable) {
1273                         /* Configure the PHY to stop receiving xMII
1274                          * clock while it is signaling LPI.
1275                          */
1276                         int val = phy_read_mmd_indirect(phydev, MDIO_CTRL1,
1277                                                         MDIO_MMD_PCS);
1278                         if (val < 0)
1279                                 return val;
1280
1281                         val |= MDIO_PCS_CTRL1_CLKSTOP_EN;
1282                         phy_write_mmd_indirect(phydev, MDIO_CTRL1,
1283                                                MDIO_MMD_PCS, val);
1284                 }
1285
1286                 return 0; /* EEE supported */
1287         }
1288 eee_exit_err:
1289         return -EPROTONOSUPPORT;
1290 }
1291 EXPORT_SYMBOL(phy_init_eee);
1292
1293 /**
1294  * phy_get_eee_err - report the EEE wake error count
1295  * @phydev: target phy_device struct
1296  *
1297  * Description: it is to report the number of time where the PHY
1298  * failed to complete its normal wake sequence.
1299  */
1300 int phy_get_eee_err(struct phy_device *phydev)
1301 {
1302         return phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_WK_ERR, MDIO_MMD_PCS);
1303 }
1304 EXPORT_SYMBOL(phy_get_eee_err);
1305
1306 /**
1307  * phy_ethtool_get_eee - get EEE supported and status
1308  * @phydev: target phy_device struct
1309  * @data: ethtool_eee data
1310  *
1311  * Description: it reportes the Supported/Advertisement/LP Advertisement
1312  * capabilities.
1313  */
1314 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1315 {
1316         int val;
1317
1318         /* Get Supported EEE */
1319         val = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE, MDIO_MMD_PCS);
1320         if (val < 0)
1321                 return val;
1322         data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1323
1324         /* Get advertisement EEE */
1325         val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN);
1326         if (val < 0)
1327                 return val;
1328         data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1329
1330         /* Get LP advertisement EEE */
1331         val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE, MDIO_MMD_AN);
1332         if (val < 0)
1333                 return val;
1334         data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1335
1336         return 0;
1337 }
1338 EXPORT_SYMBOL(phy_ethtool_get_eee);
1339
1340 /**
1341  * phy_ethtool_set_eee - set EEE supported and status
1342  * @phydev: target phy_device struct
1343  * @data: ethtool_eee data
1344  *
1345  * Description: it is to program the Advertisement EEE register.
1346  */
1347 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1348 {
1349         int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised);
1350
1351         phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, val);
1352
1353         return 0;
1354 }
1355 EXPORT_SYMBOL(phy_ethtool_set_eee);
1356
1357 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1358 {
1359         if (phydev->drv->set_wol)
1360                 return phydev->drv->set_wol(phydev, wol);
1361
1362         return -EOPNOTSUPP;
1363 }
1364 EXPORT_SYMBOL(phy_ethtool_set_wol);
1365
1366 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1367 {
1368         if (phydev->drv->get_wol)
1369                 phydev->drv->get_wol(phydev, wol);
1370 }
1371 EXPORT_SYMBOL(phy_ethtool_get_wol);
1372
1373 int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1374                                    struct ethtool_link_ksettings *cmd)
1375 {
1376         struct phy_device *phydev = ndev->phydev;
1377
1378         if (!phydev)
1379                 return -ENODEV;
1380
1381         return phy_ethtool_ksettings_get(phydev, cmd);
1382 }
1383 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1384
1385 int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1386                                    const struct ethtool_link_ksettings *cmd)
1387 {
1388         struct phy_device *phydev = ndev->phydev;
1389
1390         if (!phydev)
1391                 return -ENODEV;
1392
1393         return phy_ethtool_ksettings_set(phydev, cmd);
1394 }
1395 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);