drivers/net/phy/phy.c

   1 /* Framework for configuring and reading PHY devices
   2  * Based on code in sungem_phy.c and gianfar_phy.c
   3  *
   4  * Author: Andy Fleming
   5  *
   6  * Copyright (c) 2004 Freescale Semiconductor, Inc.
   7  * Copyright (c) 2006, 2007  Maciej W. Rozycki
   8  *
   9  * This program is free software; you can redistribute  it and/or modify it
  10  * under  the terms of  the GNU General  Public License as published by the
  11  * Free Software Foundation;  either version 2 of the  License, or (at your
  12  * option) any later version.
  13  *
  14  */
  15
  16 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  17
  18 #include <linux/kernel.h>
  19 #include <linux/string.h>
  20 #include <linux/errno.h>
  21 #include <linux/unistd.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/delay.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/skbuff.h>
  27 #include <linux/mm.h>
  28 #include <linux/module.h>
  29 #include <linux/mii.h>
  30 #include <linux/ethtool.h>
  31 #include <linux/phy.h>
  32 #include <linux/phy_led_triggers.h>
  33 #include <linux/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_5000:
  53                 return "5Gbps";
  54         case SPEED_10000:
  55                 return "10Gbps";
  56         case SPEED_14000:
  57                 return "14Gbps";
  58         case SPEED_20000:
  59                 return "20Gbps";
  60         case SPEED_25000:
  61                 return "25Gbps";
  62         case SPEED_40000:
  63                 return "40Gbps";
  64         case SPEED_50000:
  65                 return "50Gbps";
  66         case SPEED_56000:
  67                 return "56Gbps";
  68         case SPEED_100000:
  69                 return "100Gbps";
  70         case SPEED_UNKNOWN:
  71                 return "Unknown";
  72         default:
  73                 return "Unsupported (update phy.c)";
  74         }
  75 }
  76
  77 #define PHY_STATE_STR(_state)                   \
  78         case PHY_##_state:                      \
  79                 return __stringify(_state);     \
  80
  81 static const char *phy_state_to_str(enum phy_state st)
  82 {
  83         switch (st) {
  84         PHY_STATE_STR(DOWN)
  85         PHY_STATE_STR(STARTING)
  86         PHY_STATE_STR(READY)
  87         PHY_STATE_STR(PENDING)
  88         PHY_STATE_STR(UP)
  89         PHY_STATE_STR(AN)
  90         PHY_STATE_STR(RUNNING)
  91         PHY_STATE_STR(NOLINK)
  92         PHY_STATE_STR(FORCING)
  93         PHY_STATE_STR(CHANGELINK)
  94         PHY_STATE_STR(HALTED)
  95         PHY_STATE_STR(RESUMING)
  96         }
  97
  98         return NULL;
  99 }
 100
 101
 102 /**
 103  * phy_print_status - Convenience function to print out the current phy status
 104  * @phydev: the phy_device struct
 105  */
 106 void phy_print_status(struct phy_device *phydev)
 107 {
 108         if (phydev->link) {
 109                 netdev_info(phydev->attached_dev,
 110                         "Link is Up - %s/%s - flow control %s\n",
 111                         phy_speed_to_str(phydev->speed),
 112                         DUPLEX_FULL == phydev->duplex ? "Full" : "Half",
 113                         phydev->pause ? "rx/tx" : "off");
 114         } else  {
 115                 netdev_info(phydev->attached_dev, "Link is Down\n");
 116         }
 117 }
 118 EXPORT_SYMBOL(phy_print_status);
 119
 120 /**
 121  * phy_clear_interrupt - Ack the phy device's interrupt
 122  * @phydev: the phy_device struct
 123  *
 124  * If the @phydev driver has an ack_interrupt function, call it to
 125  * ack and clear the phy device's interrupt.
 126  *
 127  * Returns 0 on success or < 0 on error.
 128  */
 129 static int phy_clear_interrupt(struct phy_device *phydev)
 130 {
 131         if (phydev->drv->ack_interrupt)
 132                 return phydev->drv->ack_interrupt(phydev);
 133
 134         return 0;
 135 }
 136
 137 /**
 138  * phy_config_interrupt - configure the PHY device for the requested interrupts
 139  * @phydev: the phy_device struct
 140  * @interrupts: interrupt flags to configure for this @phydev
 141  *
 142  * Returns 0 on success or < 0 on error.
 143  */
 144 static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
 145 {
 146         phydev->interrupts = interrupts;
 147         if (phydev->drv->config_intr)
 148                 return phydev->drv->config_intr(phydev);
 149
 150         return 0;
 151 }
 152
 153 /**
 154  * phy_restart_aneg - restart auto-negotiation
 155  * @phydev: target phy_device struct
 156  *
 157  * Restart the autonegotiation on @phydev.  Returns >= 0 on success or
 158  * negative errno on error.
 159  */
 160 int phy_restart_aneg(struct phy_device *phydev)
 161 {
 162         int ret;
 163
 164         if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
 165                 ret = genphy_c45_restart_aneg(phydev);
 166         else
 167                 ret = genphy_restart_aneg(phydev);
 168
 169         return ret;
 170 }
 171 EXPORT_SYMBOL_GPL(phy_restart_aneg);
 172
 173 /**
 174  * phy_aneg_done - return auto-negotiation status
 175  * @phydev: target phy_device struct
 176  *
 177  * Description: Return the auto-negotiation status from this @phydev
 178  * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
 179  * is still pending.
 180  */
 181 int phy_aneg_done(struct phy_device *phydev)
 182 {
 183         if (phydev->drv && phydev->drv->aneg_done)
 184                 return phydev->drv->aneg_done(phydev);
 185
 186         /* Avoid genphy_aneg_done() if the Clause 45 PHY does not
 187          * implement Clause 22 registers
 188          */
 189         if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
 190                 return -EINVAL;
 191
 192         return genphy_aneg_done(phydev);
 193 }
 194 EXPORT_SYMBOL(phy_aneg_done);
 195
 196 /* A structure for mapping a particular speed and duplex
 197  * combination to a particular SUPPORTED and ADVERTISED value
 198  */
 199 struct phy_setting {
 200         int speed;
 201         int duplex;
 202         int bit;
 203 };
 204
 205 /* A mapping of all SUPPORTED settings to speed/duplex.  This table
 206  * must be grouped by speed and sorted in descending match priority
 207  * - iow, descending speed. */
 208 static const struct phy_setting settings[] = {
 209         {
 210                 .speed = SPEED_10000,
 211                 .duplex = DUPLEX_FULL,
 212                 .bit = ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
 213         },
 214         {
 215                 .speed = SPEED_10000,
 216                 .duplex = DUPLEX_FULL,
 217                 .bit = ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
 218         },
 219         {
 220                 .speed = SPEED_10000,
 221                 .duplex = DUPLEX_FULL,
 222                 .bit = ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
 223         },
 224         {
 225                 .speed = SPEED_2500,
 226                 .duplex = DUPLEX_FULL,
 227                 .bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
 228         },
 229         {
 230                 .speed = SPEED_1000,
 231                 .duplex = DUPLEX_FULL,
 232                 .bit = ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
 233         },
 234         {
 235                 .speed = SPEED_1000,
 236                 .duplex = DUPLEX_FULL,
 237                 .bit = ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
 238         },
 239         {
 240                 .speed = SPEED_1000,
 241                 .duplex = DUPLEX_HALF,
 242                 .bit = ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
 243         },
 244         {
 245                 .speed = SPEED_100,
 246                 .duplex = DUPLEX_FULL,
 247                 .bit = ETHTOOL_LINK_MODE_100baseT_Full_BIT,
 248         },
 249         {
 250                 .speed = SPEED_100,
 251                 .duplex = DUPLEX_HALF,
 252                 .bit = ETHTOOL_LINK_MODE_100baseT_Half_BIT,
 253         },
 254         {
 255                 .speed = SPEED_10,
 256                 .duplex = DUPLEX_FULL,
 257                 .bit = ETHTOOL_LINK_MODE_10baseT_Full_BIT,
 258         },
 259         {
 260                 .speed = SPEED_10,
 261                 .duplex = DUPLEX_HALF,
 262                 .bit = ETHTOOL_LINK_MODE_10baseT_Half_BIT,
 263         },
 264 };
 265
 266 /**
 267  * phy_lookup_setting - lookup a PHY setting
 268  * @speed: speed to match
 269  * @duplex: duplex to match
 270  * @mask: allowed link modes
 271  * @maxbit: bit size of link modes
 272  * @exact: an exact match is required
 273  *
 274  * Search the settings array for a setting that matches the speed and
 275  * duplex, and which is supported.
 276  *
 277  * If @exact is unset, either an exact match or %NULL for no match will
 278  * be returned.
 279  *
 280  * If @exact is set, an exact match, the fastest supported setting at
 281  * or below the specified speed, the slowest supported setting, or if
 282  * they all fail, %NULL will be returned.
 283  */
 284 static const struct phy_setting *
 285 phy_lookup_setting(int speed, int duplex, const unsigned long *mask,
 286                    size_t maxbit, bool exact)
 287 {
 288         const struct phy_setting *p, *match = NULL, *last = NULL;
 289         int i;
 290
 291         for (i = 0, p = settings; i < ARRAY_SIZE(settings); i++, p++) {
 292                 if (p->bit < maxbit && test_bit(p->bit, mask)) {
 293                         last = p;
 294                         if (p->speed == speed && p->duplex == duplex) {
 295                                 /* Exact match for speed and duplex */
 296                                 match = p;
 297                                 break;
 298                         } else if (!exact) {
 299                                 if (!match && p->speed <= speed)
 300                                         /* Candidate */
 301                                         match = p;
 302
 303                                 if (p->speed < speed)
 304                                         break;
 305                         }
 306                 }
 307         }
 308
 309         if (!match && !exact)
 310                 match = last;
 311
 312         return match;
 313 }
 314
 315 /**
 316  * phy_find_valid - find a PHY setting that matches the requested parameters
 317  * @speed: desired speed
 318  * @duplex: desired duplex
 319  * @supported: mask of supported link modes
 320  *
 321  * Locate a supported phy setting that is, in priority order:
 322  * - an exact match for the specified speed and duplex mode
 323  * - a match for the specified speed, or slower speed
 324  * - the slowest supported speed
 325  * Returns the matched phy_setting entry, or %NULL if no supported phy
 326  * settings were found.
 327  */
 328 static const struct phy_setting *
 329 phy_find_valid(int speed, int duplex, u32 supported)
 330 {
 331         unsigned long mask = supported;
 332
 333         return phy_lookup_setting(speed, duplex, &mask, BITS_PER_LONG, false);
 334 }
 335
 336 /**
 337  * phy_supported_speeds - return all speeds currently supported by a phy device
 338  * @phy: The phy device to return supported speeds of.
 339  * @speeds: buffer to store supported speeds in.
 340  * @size:   size of speeds buffer.
 341  *
 342  * Description: Returns the number of supported speeds, and fills the speeds
 343  * buffer with the supported speeds. If speeds buffer is too small to contain
 344  * all currently supported speeds, will return as many speeds as can fit.
 345  */
 346 unsigned int phy_supported_speeds(struct phy_device *phy,
 347                                   unsigned int *speeds,
 348                                   unsigned int size)
 349 {
 350         unsigned long supported = phy->supported;
 351         unsigned int count = 0;
 352         unsigned int idx = 0;
 353
 354         for (idx = 0; idx < ARRAY_SIZE(settings) && count < size; idx++)
 355                 /* Assumes settings are grouped by speed */
 356                 if (settings[idx].bit < BITS_PER_LONG &&
 357                     !test_bit(settings[idx].bit, &supported) &&
 358                     (count == 0 || speeds[count - 1] != settings[idx].speed))
 359                         speeds[count++] = settings[idx].speed;
 360
 361         return count;
 362 }
 363
 364 /**
 365  * phy_check_valid - check if there is a valid PHY setting which matches
 366  *                   speed, duplex, and feature mask
 367  * @speed: speed to match
 368  * @duplex: duplex to match
 369  * @features: A mask of the valid settings
 370  *
 371  * Description: Returns true if there is a valid setting, false otherwise.
 372  */
 373 static inline bool phy_check_valid(int speed, int duplex, u32 features)
 374 {
 375         unsigned long mask = features;
 376
 377         return !!phy_lookup_setting(speed, duplex, &mask, BITS_PER_LONG, true);
 378 }
 379
 380 /**
 381  * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
 382  * @phydev: the target phy_device struct
 383  *
 384  * Description: Make sure the PHY is set to supported speeds and
 385  *   duplexes.  Drop down by one in this order:  1000/FULL,
 386  *   1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
 387  */
 388 static void phy_sanitize_settings(struct phy_device *phydev)
 389 {
 390         const struct phy_setting *setting;
 391         u32 features = phydev->supported;
 392
 393         /* Sanitize settings based on PHY capabilities */
 394         if ((features & SUPPORTED_Autoneg) == 0)
 395                 phydev->autoneg = AUTONEG_DISABLE;
 396
 397         setting = phy_find_valid(phydev->speed, phydev->duplex, features);
 398         if (setting) {
 399                 phydev->speed = setting->speed;
 400                 phydev->duplex = setting->duplex;
 401         } else {
 402                 /* We failed to find anything (no supported speeds?) */
 403                 phydev->speed = SPEED_UNKNOWN;
 404                 phydev->duplex = DUPLEX_UNKNOWN;
 405         }
 406 }
 407
 408 /**
 409  * phy_ethtool_sset - generic ethtool sset function, handles all the details
 410  * @phydev: target phy_device struct
 411  * @cmd: ethtool_cmd
 412  *
 413  * A few notes about parameter checking:
 414  *
 415  * - We don't set port or transceiver, so we don't care what they
 416  *   were set to.
 417  * - phy_start_aneg() will make sure forced settings are sane, and
 418  *   choose the next best ones from the ones selected, so we don't
 419  *   care if ethtool tries to give us bad values.
 420  */
 421 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
 422 {
 423         u32 speed = ethtool_cmd_speed(cmd);
 424
 425         if (cmd->phy_address != phydev->mdio.addr)
 426                 return -EINVAL;
 427
 428         /* We make sure that we don't pass unsupported values in to the PHY */
 429         cmd->advertising &= phydev->supported;
 430
 431         /* Verify the settings we care about. */
 432         if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
 433                 return -EINVAL;
 434
 435         if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
 436                 return -EINVAL;
 437
 438         if (cmd->autoneg == AUTONEG_DISABLE &&
 439             ((speed != SPEED_1000 &&
 440               speed != SPEED_100 &&
 441               speed != SPEED_10) ||
 442              (cmd->duplex != DUPLEX_HALF &&
 443               cmd->duplex != DUPLEX_FULL)))
 444                 return -EINVAL;
 445
 446         phydev->autoneg = cmd->autoneg;
 447
 448         phydev->speed = speed;
 449
 450         phydev->advertising = cmd->advertising;
 451
 452         if (AUTONEG_ENABLE == cmd->autoneg)
 453                 phydev->advertising |= ADVERTISED_Autoneg;
 454         else
 455                 phydev->advertising &= ~ADVERTISED_Autoneg;
 456
 457         phydev->duplex = cmd->duplex;
 458
 459         phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl;
 460
 461         /* Restart the PHY */
 462         phy_start_aneg(phydev);
 463
 464         return 0;
 465 }
 466 EXPORT_SYMBOL(phy_ethtool_sset);
 467
 468 int phy_ethtool_ksettings_set(struct phy_device *phydev,
 469                               const struct ethtool_link_ksettings *cmd)
 470 {
 471         u8 autoneg = cmd->base.autoneg;
 472         u8 duplex = cmd->base.duplex;
 473         u32 speed = cmd->base.speed;
 474         u32 advertising;
 475
 476         if (cmd->base.phy_address != phydev->mdio.addr)
 477                 return -EINVAL;
 478
 479         ethtool_convert_link_mode_to_legacy_u32(&advertising,
 480                                                 cmd->link_modes.advertising);
 481
 482         /* We make sure that we don't pass unsupported values in to the PHY */
 483         advertising &= phydev->supported;
 484
 485         /* Verify the settings we care about. */
 486         if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
 487                 return -EINVAL;
 488
 489         if (autoneg == AUTONEG_ENABLE && advertising == 0)
 490                 return -EINVAL;
 491
 492         if (autoneg == AUTONEG_DISABLE &&
 493             ((speed != SPEED_1000 &&
 494               speed != SPEED_100 &&
 495               speed != SPEED_10) ||
 496              (duplex != DUPLEX_HALF &&
 497               duplex != DUPLEX_FULL)))
 498                 return -EINVAL;
 499
 500         phydev->autoneg = autoneg;
 501
 502         phydev->speed = speed;
 503
 504         phydev->advertising = advertising;
 505
 506         if (autoneg == AUTONEG_ENABLE)
 507                 phydev->advertising |= ADVERTISED_Autoneg;
 508         else
 509                 phydev->advertising &= ~ADVERTISED_Autoneg;
 510
 511         phydev->duplex = duplex;
 512
 513         phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
 514
 515         /* Restart the PHY */
 516         phy_start_aneg(phydev);
 517
 518         return 0;
 519 }
 520 EXPORT_SYMBOL(phy_ethtool_ksettings_set);
 521
 522 void phy_ethtool_ksettings_get(struct phy_device *phydev,
 523                                struct ethtool_link_ksettings *cmd)
 524 {
 525         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
 526                                                 phydev->supported);
 527
 528         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
 529                                                 phydev->advertising);
 530
 531         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
 532                                                 phydev->lp_advertising);
 533
 534         cmd->base.speed = phydev->speed;
 535         cmd->base.duplex = phydev->duplex;
 536         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 537                 cmd->base.port = PORT_BNC;
 538         else
 539                 cmd->base.port = PORT_MII;
 540
 541         cmd->base.phy_address = phydev->mdio.addr;
 542         cmd->base.autoneg = phydev->autoneg;
 543         cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
 544         cmd->base.eth_tp_mdix = phydev->mdix;
 545 }
 546 EXPORT_SYMBOL(phy_ethtool_ksettings_get);
 547
 548 /**
 549  * phy_mii_ioctl - generic PHY MII ioctl interface
 550  * @phydev: the phy_device struct
 551  * @ifr: &struct ifreq for socket ioctl's
 552  * @cmd: ioctl cmd to execute
 553  *
 554  * Note that this function is currently incompatible with the
 555  * PHYCONTROL layer.  It changes registers without regard to
 556  * current state.  Use at own risk.
 557  */
 558 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
 559 {
 560         struct mii_ioctl_data *mii_data = if_mii(ifr);
 561         u16 val = mii_data->val_in;
 562         bool change_autoneg = false;
 563
 564         switch (cmd) {
 565         case SIOCGMIIPHY:
 566                 mii_data->phy_id = phydev->mdio.addr;
 567                 /* fall through */
 568
 569         case SIOCGMIIREG:
 570                 mii_data->val_out = mdiobus_read(phydev->mdio.bus,
 571                                                  mii_data->phy_id,
 572                                                  mii_data->reg_num);
 573                 return 0;
 574
 575         case SIOCSMIIREG:
 576                 if (mii_data->phy_id == phydev->mdio.addr) {
 577                         switch (mii_data->reg_num) {
 578                         case MII_BMCR:
 579                                 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
 580                                         if (phydev->autoneg == AUTONEG_ENABLE)
 581                                                 change_autoneg = true;
 582                                         phydev->autoneg = AUTONEG_DISABLE;
 583                                         if (val & BMCR_FULLDPLX)
 584                                                 phydev->duplex = DUPLEX_FULL;
 585                                         else
 586                                                 phydev->duplex = DUPLEX_HALF;
 587                                         if (val & BMCR_SPEED1000)
 588                                                 phydev->speed = SPEED_1000;
 589                                         else if (val & BMCR_SPEED100)
 590                                                 phydev->speed = SPEED_100;
 591                                         else phydev->speed = SPEED_10;
 592                                 }
 593                                 else {
 594                                         if (phydev->autoneg == AUTONEG_DISABLE)
 595                                                 change_autoneg = true;
 596                                         phydev->autoneg = AUTONEG_ENABLE;
 597                                 }
 598                                 break;
 599                         case MII_ADVERTISE:
 600                                 phydev->advertising = mii_adv_to_ethtool_adv_t(val);
 601                                 change_autoneg = true;
 602                                 break;
 603                         default:
 604                                 /* do nothing */
 605                                 break;
 606                         }
 607                 }
 608
 609                 mdiobus_write(phydev->mdio.bus, mii_data->phy_id,
 610                               mii_data->reg_num, val);
 611
 612                 if (mii_data->phy_id == phydev->mdio.addr &&
 613                     mii_data->reg_num == MII_BMCR &&
 614                     val & BMCR_RESET)
 615                         return phy_init_hw(phydev);
 616
 617                 if (change_autoneg)
 618                         return phy_start_aneg(phydev);
 619
 620                 return 0;
 621
 622         case SIOCSHWTSTAMP:
 623                 if (phydev->drv && phydev->drv->hwtstamp)
 624                         return phydev->drv->hwtstamp(phydev, ifr);
 625                 /* fall through */
 626
 627         default:
 628                 return -EOPNOTSUPP;
 629         }
 630 }
 631 EXPORT_SYMBOL(phy_mii_ioctl);
 632
 633 /**
 634  * phy_start_aneg_priv - start auto-negotiation for this PHY device
 635  * @phydev: the phy_device struct
 636  * @sync: indicate whether we should wait for the workqueue cancelation
 637  *
 638  * Description: Sanitizes the settings (if we're not autonegotiating
 639  *   them), and then calls the driver's config_aneg function.
 640  *   If the PHYCONTROL Layer is operating, we change the state to
 641  *   reflect the beginning of Auto-negotiation or forcing.
 642  */
 643 static int phy_start_aneg_priv(struct phy_device *phydev, bool sync)
 644 {
 645         bool trigger = 0;
 646         int err;
 647
 648         if (!phydev->drv)
 649                 return -EIO;
 650
 651         mutex_lock(&phydev->lock);
 652
 653         if (AUTONEG_DISABLE == phydev->autoneg)
 654                 phy_sanitize_settings(phydev);
 655
 656         /* Invalidate LP advertising flags */
 657         phydev->lp_advertising = 0;
 658
 659         err = phydev->drv->config_aneg(phydev);
 660         if (err < 0)
 661                 goto out_unlock;
 662
 663         if (phydev->state != PHY_HALTED) {
 664                 if (AUTONEG_ENABLE == phydev->autoneg) {
 665                         phydev->state = PHY_AN;
 666                         phydev->link_timeout = PHY_AN_TIMEOUT;
 667                 } else {
 668                         phydev->state = PHY_FORCING;
 669                         phydev->link_timeout = PHY_FORCE_TIMEOUT;
 670                 }
 671         }
 672
 673         /* Re-schedule a PHY state machine to check PHY status because
 674          * negotiation may already be done and aneg interrupt may not be
 675          * generated.
 676          */
 677         if (phy_interrupt_is_valid(phydev) && (phydev->state == PHY_AN)) {
 678                 err = phy_aneg_done(phydev);
 679                 if (err > 0) {
 680                         trigger = true;
 681                         err = 0;
 682                 }
 683         }
 684
 685 out_unlock:
 686         mutex_unlock(&phydev->lock);
 687
 688         if (trigger)
 689                 phy_trigger_machine(phydev, sync);
 690
 691         return err;
 692 }
 693
 694 /**
 695  * phy_start_aneg - start auto-negotiation for this PHY device
 696  * @phydev: the phy_device struct
 697  *
 698  * Description: Sanitizes the settings (if we're not autonegotiating
 699  *   them), and then calls the driver's config_aneg function.
 700  *   If the PHYCONTROL Layer is operating, we change the state to
 701  *   reflect the beginning of Auto-negotiation or forcing.
 702  */
 703 int phy_start_aneg(struct phy_device *phydev)
 704 {
 705         return phy_start_aneg_priv(phydev, true);
 706 }
 707 EXPORT_SYMBOL(phy_start_aneg);
 708
 709 /**
 710  * phy_start_machine - start PHY state machine tracking
 711  * @phydev: the phy_device struct
 712  *
 713  * Description: The PHY infrastructure can run a state machine
 714  *   which tracks whether the PHY is starting up, negotiating,
 715  *   etc.  This function starts the delayed workqueue which tracks
 716  *   the state of the PHY. If you want to maintain your own state machine,
 717  *   do not call this function.
 718  */
 719 void phy_start_machine(struct phy_device *phydev)
 720 {
 721         queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
 722 }
 723
 724 /**
 725  * phy_trigger_machine - trigger the state machine to run
 726  *
 727  * @phydev: the phy_device struct
 728  * @sync: indicate whether we should wait for the workqueue cancelation
 729  *
 730  * Description: There has been a change in state which requires that the
 731  *   state machine runs.
 732  */
 733
 734 void phy_trigger_machine(struct phy_device *phydev, bool sync)
 735 {
 736         if (sync)
 737                 cancel_delayed_work_sync(&phydev->state_queue);
 738         else
 739                 cancel_delayed_work(&phydev->state_queue);
 740         queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
 741 }
 742
 743 /**
 744  * phy_stop_machine - stop the PHY state machine tracking
 745  * @phydev: target phy_device struct
 746  *
 747  * Description: Stops the state machine delayed workqueue, sets the
 748  *   state to UP (unless it wasn't up yet). This function must be
 749  *   called BEFORE phy_detach.
 750  */
 751 void phy_stop_machine(struct phy_device *phydev)
 752 {
 753         cancel_delayed_work_sync(&phydev->state_queue);
 754
 755         mutex_lock(&phydev->lock);
 756         if (phydev->state > PHY_UP && phydev->state != PHY_HALTED)
 757                 phydev->state = PHY_UP;
 758         mutex_unlock(&phydev->lock);
 759
 760         /* Now we can run the state machine synchronously */
 761         phy_state_machine(&phydev->state_queue.work);
 762 }
 763
 764 /**
 765  * phy_error - enter HALTED state for this PHY device
 766  * @phydev: target phy_device struct
 767  *
 768  * Moves the PHY to the HALTED state in response to a read
 769  * or write error, and tells the controller the link is down.
 770  * Must not be called from interrupt context, or while the
 771  * phydev->lock is held.
 772  */
 773 static void phy_error(struct phy_device *phydev)
 774 {
 775         mutex_lock(&phydev->lock);
 776         phydev->state = PHY_HALTED;
 777         mutex_unlock(&phydev->lock);
 778
 779         phy_trigger_machine(phydev, false);
 780 }
 781
 782 /**
 783  * phy_interrupt - PHY interrupt handler
 784  * @irq: interrupt line
 785  * @phy_dat: phy_device pointer
 786  *
 787  * Description: When a PHY interrupt occurs, the handler disables
 788  * interrupts, and uses phy_change to handle the interrupt.
 789  */
 790 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
 791 {
 792         struct phy_device *phydev = phy_dat;
 793
 794         if (PHY_HALTED == phydev->state)
 795                 return IRQ_NONE;                /* It can't be ours.  */
 796
 797         disable_irq_nosync(irq);
 798         atomic_inc(&phydev->irq_disable);
 799
 800         phy_change(phydev);
 801
 802         return IRQ_HANDLED;
 803 }
 804
 805 /**
 806  * phy_enable_interrupts - Enable the interrupts from the PHY side
 807  * @phydev: target phy_device struct
 808  */
 809 static int phy_enable_interrupts(struct phy_device *phydev)
 810 {
 811         int err = phy_clear_interrupt(phydev);
 812
 813         if (err < 0)
 814                 return err;
 815
 816         return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
 817 }
 818
 819 /**
 820  * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
 821  * @phydev: target phy_device struct
 822  */
 823 static int phy_disable_interrupts(struct phy_device *phydev)
 824 {
 825         int err;
 826
 827         /* Disable PHY interrupts */
 828         err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 829         if (err)
 830                 goto phy_err;
 831
 832         /* Clear the interrupt */
 833         err = phy_clear_interrupt(phydev);
 834         if (err)
 835                 goto phy_err;
 836
 837         return 0;
 838
 839 phy_err:
 840         phy_error(phydev);
 841
 842         return err;
 843 }
 844
 845 /**
 846  * phy_start_interrupts - request and enable interrupts for a PHY device
 847  * @phydev: target phy_device struct
 848  *
 849  * Description: Request the interrupt for the given PHY.
 850  *   If this fails, then we set irq to PHY_POLL.
 851  *   Otherwise, we enable the interrupts in the PHY.
 852  *   This should only be called with a valid IRQ number.
 853  *   Returns 0 on success or < 0 on error.
 854  */
 855 int phy_start_interrupts(struct phy_device *phydev)
 856 {
 857         atomic_set(&phydev->irq_disable, 0);
 858         if (request_threaded_irq(phydev->irq, NULL, phy_interrupt,
 859                                  IRQF_ONESHOT | IRQF_SHARED,
 860                                  phydev_name(phydev), phydev) < 0) {
 861                 pr_warn("%s: Can't get IRQ %d (PHY)\n",
 862                         phydev->mdio.bus->name, phydev->irq);
 863                 phydev->irq = PHY_POLL;
 864                 return 0;
 865         }
 866
 867         return phy_enable_interrupts(phydev);
 868 }
 869 EXPORT_SYMBOL(phy_start_interrupts);
 870
 871 /**
 872  * phy_stop_interrupts - disable interrupts from a PHY device
 873  * @phydev: target phy_device struct
 874  */
 875 int phy_stop_interrupts(struct phy_device *phydev)
 876 {
 877         int err = phy_disable_interrupts(phydev);
 878
 879         if (err)
 880                 phy_error(phydev);
 881
 882         free_irq(phydev->irq, phydev);
 883
 884         /* If work indeed has been cancelled, disable_irq() will have
 885          * been left unbalanced from phy_interrupt() and enable_irq()
 886          * has to be called so that other devices on the line work.
 887          */
 888         while (atomic_dec_return(&phydev->irq_disable) >= 0)
 889                 enable_irq(phydev->irq);
 890
 891         return err;
 892 }
 893 EXPORT_SYMBOL(phy_stop_interrupts);
 894
 895 /**
 896  * phy_change - Called by the phy_interrupt to handle PHY changes
 897  * @phydev: phy_device struct that interrupted
 898  */
 899 void phy_change(struct phy_device *phydev)
 900 {
 901         if (phy_interrupt_is_valid(phydev)) {
 902                 if (phydev->drv->did_interrupt &&
 903                     !phydev->drv->did_interrupt(phydev))
 904                         goto ignore;
 905
 906                 if (phy_disable_interrupts(phydev))
 907                         goto phy_err;
 908         }
 909
 910         mutex_lock(&phydev->lock);
 911         if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
 912                 phydev->state = PHY_CHANGELINK;
 913         mutex_unlock(&phydev->lock);
 914
 915         if (phy_interrupt_is_valid(phydev)) {
 916                 atomic_dec(&phydev->irq_disable);
 917                 enable_irq(phydev->irq);
 918
 919                 /* Reenable interrupts */
 920                 if (PHY_HALTED != phydev->state &&
 921                     phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED))
 922                         goto irq_enable_err;
 923         }
 924
 925         /* reschedule state queue work to run as soon as possible */
 926         phy_trigger_machine(phydev, true);
 927         return;
 928
 929 ignore:
 930         atomic_dec(&phydev->irq_disable);
 931         enable_irq(phydev->irq);
 932         return;
 933
 934 irq_enable_err:
 935         disable_irq(phydev->irq);
 936         atomic_inc(&phydev->irq_disable);
 937 phy_err:
 938         phy_error(phydev);
 939 }
 940
 941 /**
 942  * phy_change_work - Scheduled by the phy_mac_interrupt to handle PHY changes
 943  * @work: work_struct that describes the work to be done
 944  */
 945 void phy_change_work(struct work_struct *work)
 946 {
 947         struct phy_device *phydev =
 948                 container_of(work, struct phy_device, phy_queue);
 949
 950         phy_change(phydev);
 951 }
 952
 953 /**
 954  * phy_stop - Bring down the PHY link, and stop checking the status
 955  * @phydev: target phy_device struct
 956  */
 957 void phy_stop(struct phy_device *phydev)
 958 {
 959         mutex_lock(&phydev->lock);
 960
 961         if (PHY_HALTED == phydev->state)
 962                 goto out_unlock;
 963
 964         if (phy_interrupt_is_valid(phydev)) {
 965                 /* Disable PHY Interrupts */
 966                 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 967
 968                 /* Clear any pending interrupts */
 969                 phy_clear_interrupt(phydev);
 970         }
 971
 972         phydev->state = PHY_HALTED;
 973
 974 out_unlock:
 975         mutex_unlock(&phydev->lock);
 976
 977         /* Cannot call flush_scheduled_work() here as desired because
 978          * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
 979          * will not reenable interrupts.
 980          */
 981 }
 982 EXPORT_SYMBOL(phy_stop);
 983
 984 /**
 985  * phy_start - start or restart a PHY device
 986  * @phydev: target phy_device struct
 987  *
 988  * Description: Indicates the attached device's readiness to
 989  *   handle PHY-related work.  Used during startup to start the
 990  *   PHY, and after a call to phy_stop() to resume operation.
 991  *   Also used to indicate the MDIO bus has cleared an error
 992  *   condition.
 993  */
 994 void phy_start(struct phy_device *phydev)
 995 {
 996         bool do_resume = false;
 997         int err = 0;
 998
 999         mutex_lock(&phydev->lock);
1000
1001         switch (phydev->state) {
1002         case PHY_STARTING:
1003                 phydev->state = PHY_PENDING;
1004                 break;
1005         case PHY_READY:
1006                 phydev->state = PHY_UP;
1007                 break;
1008         case PHY_HALTED:
1009                 /* make sure interrupts are re-enabled for the PHY */
1010                 if (phydev->irq != PHY_POLL) {
1011                         err = phy_enable_interrupts(phydev);
1012                         if (err < 0)
1013                                 break;
1014                 }
1015
1016                 phydev->state = PHY_RESUMING;
1017                 do_resume = true;
1018                 break;
1019         default:
1020                 break;
1021         }
1022         mutex_unlock(&phydev->lock);
1023
1024         /* if phy was suspended, bring the physical link up again */
1025         if (do_resume)
1026                 phy_resume(phydev);
1027
1028         phy_trigger_machine(phydev, true);
1029 }
1030 EXPORT_SYMBOL(phy_start);
1031
1032 static void phy_adjust_link(struct phy_device *phydev)
1033 {
1034         phydev->adjust_link(phydev->attached_dev);
1035         phy_led_trigger_change_speed(phydev);
1036 }
1037
1038 /**
1039  * phy_state_machine - Handle the state machine
1040  * @work: work_struct that describes the work to be done
1041  */
1042 void phy_state_machine(struct work_struct *work)
1043 {
1044         struct delayed_work *dwork = to_delayed_work(work);
1045         struct phy_device *phydev =
1046                         container_of(dwork, struct phy_device, state_queue);
1047         bool needs_aneg = false, do_suspend = false;
1048         enum phy_state old_state;
1049         int err = 0;
1050         int old_link;
1051
1052         mutex_lock(&phydev->lock);
1053
1054         old_state = phydev->state;
1055
1056         if (phydev->drv && phydev->drv->link_change_notify)
1057                 phydev->drv->link_change_notify(phydev);
1058
1059         switch (phydev->state) {
1060         case PHY_DOWN:
1061         case PHY_STARTING:
1062         case PHY_READY:
1063         case PHY_PENDING:
1064                 break;
1065         case PHY_UP:
1066                 needs_aneg = true;
1067
1068                 phydev->link_timeout = PHY_AN_TIMEOUT;
1069
1070                 break;
1071         case PHY_AN:
1072                 err = phy_read_status(phydev);
1073                 if (err < 0)
1074                         break;
1075
1076                 /* If the link is down, give up on negotiation for now */
1077                 if (!phydev->link) {
1078                         phydev->state = PHY_NOLINK;
1079                         netif_carrier_off(phydev->attached_dev);
1080                         phy_adjust_link(phydev);
1081                         break;
1082                 }
1083
1084                 /* Check if negotiation is done.  Break if there's an error */
1085                 err = phy_aneg_done(phydev);
1086                 if (err < 0)
1087                         break;
1088
1089                 /* If AN is done, we're running */
1090                 if (err > 0) {
1091                         phydev->state = PHY_RUNNING;
1092                         netif_carrier_on(phydev->attached_dev);
1093                         phy_adjust_link(phydev);
1094
1095                 } else if (0 == phydev->link_timeout--)
1096                         needs_aneg = true;
1097                 break;
1098         case PHY_NOLINK:
1099                 if (phy_interrupt_is_valid(phydev))
1100                         break;
1101
1102                 err = phy_read_status(phydev);
1103                 if (err)
1104                         break;
1105
1106                 if (phydev->link) {
1107                         if (AUTONEG_ENABLE == phydev->autoneg) {
1108                                 err = phy_aneg_done(phydev);
1109                                 if (err < 0)
1110                                         break;
1111
1112                                 if (!err) {
1113                                         phydev->state = PHY_AN;
1114                                         phydev->link_timeout = PHY_AN_TIMEOUT;
1115                                         break;
1116                                 }
1117                         }
1118                         phydev->state = PHY_RUNNING;
1119                         netif_carrier_on(phydev->attached_dev);
1120                         phy_adjust_link(phydev);
1121                 }
1122                 break;
1123         case PHY_FORCING:
1124                 err = genphy_update_link(phydev);
1125                 if (err)
1126                         break;
1127
1128                 if (phydev->link) {
1129                         phydev->state = PHY_RUNNING;
1130                         netif_carrier_on(phydev->attached_dev);
1131                 } else {
1132                         if (0 == phydev->link_timeout--)
1133                                 needs_aneg = true;
1134                 }
1135
1136                 phy_adjust_link(phydev);
1137                 break;
1138         case PHY_RUNNING:
1139                 /* Only register a CHANGE if we are polling and link changed
1140                  * since latest checking.
1141                  */
1142                 if (phydev->irq == PHY_POLL) {
1143                         old_link = phydev->link;
1144                         err = phy_read_status(phydev);
1145                         if (err)
1146                                 break;
1147
1148                         if (old_link != phydev->link)
1149                                 phydev->state = PHY_CHANGELINK;
1150                 }
1151                 /*
1152                  * Failsafe: check that nobody set phydev->link=0 between two
1153                  * poll cycles, otherwise we won't leave RUNNING state as long
1154                  * as link remains down.
1155                  */
1156                 if (!phydev->link && phydev->state == PHY_RUNNING) {
1157                         phydev->state = PHY_CHANGELINK;
1158                         phydev_err(phydev, "no link in PHY_RUNNING\n");
1159                 }
1160                 break;
1161         case PHY_CHANGELINK:
1162                 err = phy_read_status(phydev);
1163                 if (err)
1164                         break;
1165
1166                 if (phydev->link) {
1167                         phydev->state = PHY_RUNNING;
1168                         netif_carrier_on(phydev->attached_dev);
1169                 } else {
1170                         phydev->state = PHY_NOLINK;
1171                         netif_carrier_off(phydev->attached_dev);
1172                 }
1173
1174                 phy_adjust_link(phydev);
1175
1176                 if (phy_interrupt_is_valid(phydev))
1177                         err = phy_config_interrupt(phydev,
1178                                                    PHY_INTERRUPT_ENABLED);
1179                 break;
1180         case PHY_HALTED:
1181                 if (phydev->link) {
1182                         phydev->link = 0;
1183                         netif_carrier_off(phydev->attached_dev);
1184                         phy_adjust_link(phydev);
1185                         do_suspend = true;
1186                 }
1187                 break;
1188         case PHY_RESUMING:
1189                 if (AUTONEG_ENABLE == phydev->autoneg) {
1190                         err = phy_aneg_done(phydev);
1191                         if (err < 0)
1192                                 break;
1193
1194                         /* err > 0 if AN is done.
1195                          * Otherwise, it's 0, and we're  still waiting for AN
1196                          */
1197                         if (err > 0) {
1198                                 err = phy_read_status(phydev);
1199                                 if (err)
1200                                         break;
1201
1202                                 if (phydev->link) {
1203                                         phydev->state = PHY_RUNNING;
1204                                         netif_carrier_on(phydev->attached_dev);
1205                                 } else  {
1206                                         phydev->state = PHY_NOLINK;
1207                                 }
1208                                 phy_adjust_link(phydev);
1209                         } else {
1210                                 phydev->state = PHY_AN;
1211                                 phydev->link_timeout = PHY_AN_TIMEOUT;
1212                         }
1213                 } else {
1214                         err = phy_read_status(phydev);
1215                         if (err)
1216                                 break;
1217
1218                         if (phydev->link) {
1219                                 phydev->state = PHY_RUNNING;
1220                                 netif_carrier_on(phydev->attached_dev);
1221                         } else  {
1222                                 phydev->state = PHY_NOLINK;
1223                         }
1224                         phy_adjust_link(phydev);
1225                 }
1226                 break;
1227         }
1228
1229         mutex_unlock(&phydev->lock);
1230
1231         if (needs_aneg)
1232                 err = phy_start_aneg_priv(phydev, false);
1233         else if (do_suspend)
1234                 phy_suspend(phydev);
1235
1236         if (err < 0)
1237                 phy_error(phydev);
1238
1239         if (old_state != phydev->state)
1240                 phydev_dbg(phydev, "PHY state change %s -> %s\n",
1241                            phy_state_to_str(old_state),
1242                            phy_state_to_str(phydev->state));
1243
1244         /* Only re-schedule a PHY state machine change if we are polling the
1245          * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
1246          * between states from phy_mac_interrupt()
1247          */
1248         if (phydev->irq == PHY_POLL)
1249                 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
1250                                    PHY_STATE_TIME * HZ);
1251 }
1252
1253 /**
1254  * phy_mac_interrupt - MAC says the link has changed
1255  * @phydev: phy_device struct with changed link
1256  * @new_link: Link is Up/Down.
1257  *
1258  * Description: The MAC layer is able indicate there has been a change
1259  *   in the PHY link status. Set the new link status, and trigger the
1260  *   state machine, work a work queue.
1261  */
1262 void phy_mac_interrupt(struct phy_device *phydev, int new_link)
1263 {
1264         phydev->link = new_link;
1265
1266         /* Trigger a state machine change */
1267         queue_work(system_power_efficient_wq, &phydev->phy_queue);
1268 }
1269 EXPORT_SYMBOL(phy_mac_interrupt);
1270
1271 /**
1272  * phy_init_eee - init and check the EEE feature
1273  * @phydev: target phy_device struct
1274  * @clk_stop_enable: PHY may stop the clock during LPI
1275  *
1276  * Description: it checks if the Energy-Efficient Ethernet (EEE)
1277  * is supported by looking at the MMD registers 3.20 and 7.60/61
1278  * and it programs the MMD register 3.0 setting the "Clock stop enable"
1279  * bit if required.
1280  */
1281 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1282 {
1283         if (!phydev->drv)
1284                 return -EIO;
1285
1286         /* According to 802.3az,the EEE is supported only in full duplex-mode.
1287          */
1288         if (phydev->duplex == DUPLEX_FULL) {
1289                 int eee_lp, eee_cap, eee_adv;
1290                 u32 lp, cap, adv;
1291                 int status;
1292
1293                 /* Read phy status to properly get the right settings */
1294                 status = phy_read_status(phydev);
1295                 if (status)
1296                         return status;
1297
1298                 /* First check if the EEE ability is supported */
1299                 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1300                 if (eee_cap <= 0)
1301                         goto eee_exit_err;
1302
1303                 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1304                 if (!cap)
1305                         goto eee_exit_err;
1306
1307                 /* Check which link settings negotiated and verify it in
1308                  * the EEE advertising registers.
1309                  */
1310                 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1311                 if (eee_lp <= 0)
1312                         goto eee_exit_err;
1313
1314                 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1315                 if (eee_adv <= 0)
1316                         goto eee_exit_err;
1317
1318                 adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
1319                 lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
1320                 if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv))
1321                         goto eee_exit_err;
1322
1323                 if (clk_stop_enable) {
1324                         /* Configure the PHY to stop receiving xMII
1325                          * clock while it is signaling LPI.
1326                          */
1327                         int val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
1328                         if (val < 0)
1329                                 return val;
1330
1331                         val |= MDIO_PCS_CTRL1_CLKSTOP_EN;
1332                         phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, val);
1333                 }
1334
1335                 return 0; /* EEE supported */
1336         }
1337 eee_exit_err:
1338         return -EPROTONOSUPPORT;
1339 }
1340 EXPORT_SYMBOL(phy_init_eee);
1341
1342 /**
1343  * phy_get_eee_err - report the EEE wake error count
1344  * @phydev: target phy_device struct
1345  *
1346  * Description: it is to report the number of time where the PHY
1347  * failed to complete its normal wake sequence.
1348  */
1349 int phy_get_eee_err(struct phy_device *phydev)
1350 {
1351         if (!phydev->drv)
1352                 return -EIO;
1353
1354         return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1355 }
1356 EXPORT_SYMBOL(phy_get_eee_err);
1357
1358 /**
1359  * phy_ethtool_get_eee - get EEE supported and status
1360  * @phydev: target phy_device struct
1361  * @data: ethtool_eee data
1362  *
1363  * Description: it reportes the Supported/Advertisement/LP Advertisement
1364  * capabilities.
1365  */
1366 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1367 {
1368         int val;
1369
1370         if (!phydev->drv)
1371                 return -EIO;
1372
1373         /* Get Supported EEE */
1374         val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1375         if (val < 0)
1376                 return val;
1377         data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1378
1379         /* Get advertisement EEE */
1380         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1381         if (val < 0)
1382                 return val;
1383         data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1384
1385         /* Get LP advertisement EEE */
1386         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1387         if (val < 0)
1388                 return val;
1389         data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1390
1391         return 0;
1392 }
1393 EXPORT_SYMBOL(phy_ethtool_get_eee);
1394
1395 /**
1396  * phy_ethtool_set_eee - set EEE supported and status
1397  * @phydev: target phy_device struct
1398  * @data: ethtool_eee data
1399  *
1400  * Description: it is to program the Advertisement EEE register.
1401  */
1402 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1403 {
1404         int cap, old_adv, adv, ret;
1405
1406         if (!phydev->drv)
1407                 return -EIO;
1408
1409         /* Get Supported EEE */
1410         cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1411         if (cap < 0)
1412                 return cap;
1413
1414         old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1415         if (old_adv < 0)
1416                 return old_adv;
1417
1418         adv = ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1419
1420         /* Mask prohibited EEE modes */
1421         adv &= ~phydev->eee_broken_modes;
1422
1423         if (old_adv != adv) {
1424                 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1425                 if (ret < 0)
1426                         return ret;
1427
1428                 /* Restart autonegotiation so the new modes get sent to the
1429                  * link partner.
1430                  */
1431                 ret = phy_restart_aneg(phydev);
1432                 if (ret < 0)
1433                         return ret;
1434         }
1435
1436         return 0;
1437 }
1438 EXPORT_SYMBOL(phy_ethtool_set_eee);
1439
1440 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1441 {
1442         if (phydev->drv && phydev->drv->set_wol)
1443                 return phydev->drv->set_wol(phydev, wol);
1444
1445         return -EOPNOTSUPP;
1446 }
1447 EXPORT_SYMBOL(phy_ethtool_set_wol);
1448
1449 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1450 {
1451         if (phydev->drv && phydev->drv->get_wol)
1452                 phydev->drv->get_wol(phydev, wol);
1453 }
1454 EXPORT_SYMBOL(phy_ethtool_get_wol);
1455
1456 int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1457                                    struct ethtool_link_ksettings *cmd)
1458 {
1459         struct phy_device *phydev = ndev->phydev;
1460
1461         if (!phydev)
1462                 return -ENODEV;
1463
1464         phy_ethtool_ksettings_get(phydev, cmd);
1465
1466         return 0;
1467 }
1468 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1469
1470 int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1471                                    const struct ethtool_link_ksettings *cmd)
1472 {
1473         struct phy_device *phydev = ndev->phydev;
1474
1475         if (!phydev)
1476                 return -ENODEV;
1477
1478         return phy_ethtool_ksettings_set(phydev, cmd);
1479 }
1480 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1481
1482 int phy_ethtool_nway_reset(struct net_device *ndev)
1483 {
1484         struct phy_device *phydev = ndev->phydev;
1485
1486         if (!phydev)
1487                 return -ENODEV;
1488
1489         if (!phydev->drv)
1490                 return -EIO;
1491
1492         return phy_restart_aneg(phydev);
1493 }
1494 EXPORT_SYMBOL(phy_ethtool_nway_reset);