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