drivers/net/phy/phy.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /* Framework for configuring and reading PHY devices
   3  * Based on code in sungem_phy.c and gianfar_phy.c
   4  *
   5  * Author: Andy Fleming
   6  *
   7  * Copyright (c) 2004 Freescale Semiconductor, Inc.
   8  * Copyright (c) 2006, 2007  Maciej W. Rozycki
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/string.h>
  13 #include <linux/errno.h>
  14 #include <linux/unistd.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/delay.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/netlink.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/skbuff.h>
  21 #include <linux/mm.h>
  22 #include <linux/module.h>
  23 #include <linux/mii.h>
  24 #include <linux/ethtool.h>
  25 #include <linux/ethtool_netlink.h>
  26 #include <linux/phy.h>
  27 #include <linux/phy_led_triggers.h>
  28 #include <linux/sfp.h>
  29 #include <linux/workqueue.h>
  30 #include <linux/mdio.h>
  31 #include <linux/io.h>
  32 #include <linux/uaccess.h>
  33 #include <linux/atomic.h>
  34 #include <net/netlink.h>
  35 #include <net/genetlink.h>
  36 #include <net/sock.h>
  37
  38 #define PHY_STATE_TIME  HZ
  39
  40 #define PHY_STATE_STR(_state)                   \
  41         case PHY_##_state:                      \
  42                 return __stringify(_state);     \
  43
  44 static const char *phy_state_to_str(enum phy_state st)
  45 {
  46         switch (st) {
  47         PHY_STATE_STR(DOWN)
  48         PHY_STATE_STR(READY)
  49         PHY_STATE_STR(UP)
  50         PHY_STATE_STR(RUNNING)
  51         PHY_STATE_STR(NOLINK)
  52         PHY_STATE_STR(CABLETEST)
  53         PHY_STATE_STR(HALTED)
  54         }
  55
  56         return NULL;
  57 }
  58
  59 static void phy_process_state_change(struct phy_device *phydev,
  60                                      enum phy_state old_state)
  61 {
  62         if (old_state != phydev->state) {
  63                 phydev_dbg(phydev, "PHY state change %s -> %s\n",
  64                            phy_state_to_str(old_state),
  65                            phy_state_to_str(phydev->state));
  66                 if (phydev->drv && phydev->drv->link_change_notify)
  67                         phydev->drv->link_change_notify(phydev);
  68         }
  69 }
  70
  71 static void phy_link_up(struct phy_device *phydev)
  72 {
  73         phydev->phy_link_change(phydev, true);
  74         phy_led_trigger_change_speed(phydev);
  75 }
  76
  77 static void phy_link_down(struct phy_device *phydev)
  78 {
  79         phydev->phy_link_change(phydev, false);
  80         phy_led_trigger_change_speed(phydev);
  81 }
  82
  83 static const char *phy_pause_str(struct phy_device *phydev)
  84 {
  85         bool local_pause, local_asym_pause;
  86
  87         if (phydev->autoneg == AUTONEG_DISABLE)
  88                 goto no_pause;
  89
  90         local_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
  91                                         phydev->advertising);
  92         local_asym_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
  93                                              phydev->advertising);
  94
  95         if (local_pause && phydev->pause)
  96                 return "rx/tx";
  97
  98         if (local_asym_pause && phydev->asym_pause) {
  99                 if (local_pause)
 100                         return "rx";
 101                 if (phydev->pause)
 102                         return "tx";
 103         }
 104
 105 no_pause:
 106         return "off";
 107 }
 108
 109 /**
 110  * phy_print_status - Convenience function to print out the current phy status
 111  * @phydev: the phy_device struct
 112  */
 113 void phy_print_status(struct phy_device *phydev)
 114 {
 115         if (phydev->link) {
 116                 netdev_info(phydev->attached_dev,
 117                         "Link is Up - %s/%s %s- flow control %s\n",
 118                         phy_speed_to_str(phydev->speed),
 119                         phy_duplex_to_str(phydev->duplex),
 120                         phydev->downshifted_rate ? "(downshifted) " : "",
 121                         phy_pause_str(phydev));
 122         } else  {
 123                 netdev_info(phydev->attached_dev, "Link is Down\n");
 124         }
 125 }
 126 EXPORT_SYMBOL(phy_print_status);
 127
 128 /**
 129  * phy_clear_interrupt - Ack the phy device's interrupt
 130  * @phydev: the phy_device struct
 131  *
 132  * If the @phydev driver has an ack_interrupt function, call it to
 133  * ack and clear the phy device's interrupt.
 134  *
 135  * Returns 0 on success or < 0 on error.
 136  */
 137 static int phy_clear_interrupt(struct phy_device *phydev)
 138 {
 139         int ret = 0;
 140
 141         if (phydev->drv->ack_interrupt) {
 142                 mutex_lock(&phydev->lock);
 143                 ret = phydev->drv->ack_interrupt(phydev);
 144                 mutex_unlock(&phydev->lock);
 145         }
 146
 147         return ret;
 148 }
 149
 150 /**
 151  * phy_config_interrupt - configure the PHY device for the requested interrupts
 152  * @phydev: the phy_device struct
 153  * @interrupts: interrupt flags to configure for this @phydev
 154  *
 155  * Returns 0 on success or < 0 on error.
 156  */
 157 static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
 158 {
 159         phydev->interrupts = interrupts ? 1 : 0;
 160         if (phydev->drv->config_intr)
 161                 return phydev->drv->config_intr(phydev);
 162
 163         return 0;
 164 }
 165
 166 /**
 167  * phy_restart_aneg - restart auto-negotiation
 168  * @phydev: target phy_device struct
 169  *
 170  * Restart the autonegotiation on @phydev.  Returns >= 0 on success or
 171  * negative errno on error.
 172  */
 173 int phy_restart_aneg(struct phy_device *phydev)
 174 {
 175         int ret;
 176
 177         if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
 178                 ret = genphy_c45_restart_aneg(phydev);
 179         else
 180                 ret = genphy_restart_aneg(phydev);
 181
 182         return ret;
 183 }
 184 EXPORT_SYMBOL_GPL(phy_restart_aneg);
 185
 186 /**
 187  * phy_aneg_done - return auto-negotiation status
 188  * @phydev: target phy_device struct
 189  *
 190  * Description: Return the auto-negotiation status from this @phydev
 191  * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
 192  * is still pending.
 193  */
 194 int phy_aneg_done(struct phy_device *phydev)
 195 {
 196         if (phydev->drv && phydev->drv->aneg_done)
 197                 return phydev->drv->aneg_done(phydev);
 198         else if (phydev->is_c45)
 199                 return genphy_c45_aneg_done(phydev);
 200         else
 201                 return genphy_aneg_done(phydev);
 202 }
 203 EXPORT_SYMBOL(phy_aneg_done);
 204
 205 /**
 206  * phy_find_valid - find a PHY setting that matches the requested parameters
 207  * @speed: desired speed
 208  * @duplex: desired duplex
 209  * @supported: mask of supported link modes
 210  *
 211  * Locate a supported phy setting that is, in priority order:
 212  * - an exact match for the specified speed and duplex mode
 213  * - a match for the specified speed, or slower speed
 214  * - the slowest supported speed
 215  * Returns the matched phy_setting entry, or %NULL if no supported phy
 216  * settings were found.
 217  */
 218 static const struct phy_setting *
 219 phy_find_valid(int speed, int duplex, unsigned long *supported)
 220 {
 221         return phy_lookup_setting(speed, duplex, supported, false);
 222 }
 223
 224 /**
 225  * phy_supported_speeds - return all speeds currently supported by a phy device
 226  * @phy: The phy device to return supported speeds of.
 227  * @speeds: buffer to store supported speeds in.
 228  * @size:   size of speeds buffer.
 229  *
 230  * Description: Returns the number of supported speeds, and fills the speeds
 231  * buffer with the supported speeds. If speeds buffer is too small to contain
 232  * all currently supported speeds, will return as many speeds as can fit.
 233  */
 234 unsigned int phy_supported_speeds(struct phy_device *phy,
 235                                   unsigned int *speeds,
 236                                   unsigned int size)
 237 {
 238         return phy_speeds(speeds, size, phy->supported);
 239 }
 240
 241 /**
 242  * phy_check_valid - check if there is a valid PHY setting which matches
 243  *                   speed, duplex, and feature mask
 244  * @speed: speed to match
 245  * @duplex: duplex to match
 246  * @features: A mask of the valid settings
 247  *
 248  * Description: Returns true if there is a valid setting, false otherwise.
 249  */
 250 static inline bool phy_check_valid(int speed, int duplex,
 251                                    unsigned long *features)
 252 {
 253         return !!phy_lookup_setting(speed, duplex, features, true);
 254 }
 255
 256 /**
 257  * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
 258  * @phydev: the target phy_device struct
 259  *
 260  * Description: Make sure the PHY is set to supported speeds and
 261  *   duplexes.  Drop down by one in this order:  1000/FULL,
 262  *   1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
 263  */
 264 static void phy_sanitize_settings(struct phy_device *phydev)
 265 {
 266         const struct phy_setting *setting;
 267
 268         setting = phy_find_valid(phydev->speed, phydev->duplex,
 269                                  phydev->supported);
 270         if (setting) {
 271                 phydev->speed = setting->speed;
 272                 phydev->duplex = setting->duplex;
 273         } else {
 274                 /* We failed to find anything (no supported speeds?) */
 275                 phydev->speed = SPEED_UNKNOWN;
 276                 phydev->duplex = DUPLEX_UNKNOWN;
 277         }
 278 }
 279
 280 void phy_ethtool_ksettings_get(struct phy_device *phydev,
 281                                struct ethtool_link_ksettings *cmd)
 282 {
 283         mutex_lock(&phydev->lock);
 284         linkmode_copy(cmd->link_modes.supported, phydev->supported);
 285         linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
 286         linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);
 287
 288         cmd->base.speed = phydev->speed;
 289         cmd->base.duplex = phydev->duplex;
 290         cmd->base.master_slave_cfg = phydev->master_slave_get;
 291         cmd->base.master_slave_state = phydev->master_slave_state;
 292         if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
 293                 cmd->base.port = PORT_BNC;
 294         else
 295                 cmd->base.port = phydev->port;
 296         cmd->base.transceiver = phy_is_internal(phydev) ?
 297                                 XCVR_INTERNAL : XCVR_EXTERNAL;
 298         cmd->base.phy_address = phydev->mdio.addr;
 299         cmd->base.autoneg = phydev->autoneg;
 300         cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
 301         cmd->base.eth_tp_mdix = phydev->mdix;
 302         mutex_unlock(&phydev->lock);
 303 }
 304 EXPORT_SYMBOL(phy_ethtool_ksettings_get);
 305
 306 /**
 307  * phy_mii_ioctl - generic PHY MII ioctl interface
 308  * @phydev: the phy_device struct
 309  * @ifr: &struct ifreq for socket ioctl's
 310  * @cmd: ioctl cmd to execute
 311  *
 312  * Note that this function is currently incompatible with the
 313  * PHYCONTROL layer.  It changes registers without regard to
 314  * current state.  Use at own risk.
 315  */
 316 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
 317 {
 318         struct mii_ioctl_data *mii_data = if_mii(ifr);
 319         u16 val = mii_data->val_in;
 320         bool change_autoneg = false;
 321         int prtad, devad;
 322
 323         switch (cmd) {
 324         case SIOCGMIIPHY:
 325                 mii_data->phy_id = phydev->mdio.addr;
 326                 fallthrough;
 327
 328         case SIOCGMIIREG:
 329                 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
 330                         prtad = mdio_phy_id_prtad(mii_data->phy_id);
 331                         devad = mdio_phy_id_devad(mii_data->phy_id);
 332                         devad = mdiobus_c45_addr(devad, mii_data->reg_num);
 333                 } else {
 334                         prtad = mii_data->phy_id;
 335                         devad = mii_data->reg_num;
 336                 }
 337                 mii_data->val_out = mdiobus_read(phydev->mdio.bus, prtad,
 338                                                  devad);
 339                 return 0;
 340
 341         case SIOCSMIIREG:
 342                 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
 343                         prtad = mdio_phy_id_prtad(mii_data->phy_id);
 344                         devad = mdio_phy_id_devad(mii_data->phy_id);
 345                         devad = mdiobus_c45_addr(devad, mii_data->reg_num);
 346                 } else {
 347                         prtad = mii_data->phy_id;
 348                         devad = mii_data->reg_num;
 349                 }
 350                 if (prtad == phydev->mdio.addr) {
 351                         switch (devad) {
 352                         case MII_BMCR:
 353                                 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
 354                                         if (phydev->autoneg == AUTONEG_ENABLE)
 355                                                 change_autoneg = true;
 356                                         phydev->autoneg = AUTONEG_DISABLE;
 357                                         if (val & BMCR_FULLDPLX)
 358                                                 phydev->duplex = DUPLEX_FULL;
 359                                         else
 360                                                 phydev->duplex = DUPLEX_HALF;
 361                                         if (val & BMCR_SPEED1000)
 362                                                 phydev->speed = SPEED_1000;
 363                                         else if (val & BMCR_SPEED100)
 364                                                 phydev->speed = SPEED_100;
 365                                         else phydev->speed = SPEED_10;
 366                                 }
 367                                 else {
 368                                         if (phydev->autoneg == AUTONEG_DISABLE)
 369                                                 change_autoneg = true;
 370                                         phydev->autoneg = AUTONEG_ENABLE;
 371                                 }
 372                                 break;
 373                         case MII_ADVERTISE:
 374                                 mii_adv_mod_linkmode_adv_t(phydev->advertising,
 375                                                            val);
 376                                 change_autoneg = true;
 377                                 break;
 378                         case MII_CTRL1000:
 379                                 mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
 380                                                                 val);
 381                                 change_autoneg = true;
 382                                 break;
 383                         default:
 384                                 /* do nothing */
 385                                 break;
 386                         }
 387                 }
 388
 389                 mdiobus_write(phydev->mdio.bus, prtad, devad, val);
 390
 391                 if (prtad == phydev->mdio.addr &&
 392                     devad == MII_BMCR &&
 393                     val & BMCR_RESET)
 394                         return phy_init_hw(phydev);
 395
 396                 if (change_autoneg)
 397                         return phy_start_aneg(phydev);
 398
 399                 return 0;
 400
 401         case SIOCSHWTSTAMP:
 402                 if (phydev->mii_ts && phydev->mii_ts->hwtstamp)
 403                         return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr);
 404                 fallthrough;
 405
 406         default:
 407                 return -EOPNOTSUPP;
 408         }
 409 }
 410 EXPORT_SYMBOL(phy_mii_ioctl);
 411
 412 /**
 413  * phy_do_ioctl - generic ndo_do_ioctl implementation
 414  * @dev: the net_device struct
 415  * @ifr: &struct ifreq for socket ioctl's
 416  * @cmd: ioctl cmd to execute
 417  */
 418 int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 419 {
 420         if (!dev->phydev)
 421                 return -ENODEV;
 422
 423         return phy_mii_ioctl(dev->phydev, ifr, cmd);
 424 }
 425 EXPORT_SYMBOL(phy_do_ioctl);
 426
 427 /**
 428  * phy_do_ioctl_running - generic ndo_do_ioctl implementation but test first
 429  *
 430  * @dev: the net_device struct
 431  * @ifr: &struct ifreq for socket ioctl's
 432  * @cmd: ioctl cmd to execute
 433  *
 434  * Same as phy_do_ioctl, but ensures that net_device is running before
 435  * handling the ioctl.
 436  */
 437 int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd)
 438 {
 439         if (!netif_running(dev))
 440                 return -ENODEV;
 441
 442         return phy_do_ioctl(dev, ifr, cmd);
 443 }
 444 EXPORT_SYMBOL(phy_do_ioctl_running);
 445
 446 /**
 447  * phy_queue_state_machine - Trigger the state machine to run soon
 448  *
 449  * @phydev: the phy_device struct
 450  * @jiffies: Run the state machine after these jiffies
 451  */
 452 void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
 453 {
 454         mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
 455                          jiffies);
 456 }
 457 EXPORT_SYMBOL(phy_queue_state_machine);
 458
 459 /**
 460  * phy_queue_state_machine - Trigger the state machine to run now
 461  *
 462  * @phydev: the phy_device struct
 463  */
 464 static void phy_trigger_machine(struct phy_device *phydev)
 465 {
 466         phy_queue_state_machine(phydev, 0);
 467 }
 468
 469 static void phy_abort_cable_test(struct phy_device *phydev)
 470 {
 471         int err;
 472
 473         ethnl_cable_test_finished(phydev);
 474
 475         err = phy_init_hw(phydev);
 476         if (err)
 477                 phydev_err(phydev, "Error while aborting cable test");
 478 }
 479
 480 /**
 481  * phy_ethtool_get_strings - Get the statistic counter names
 482  *
 483  * @phydev: the phy_device struct
 484  * @data: Where to put the strings
 485  */
 486 int phy_ethtool_get_strings(struct phy_device *phydev, u8 *data)
 487 {
 488         if (!phydev->drv)
 489                 return -EIO;
 490
 491         mutex_lock(&phydev->lock);
 492         phydev->drv->get_strings(phydev, data);
 493         mutex_unlock(&phydev->lock);
 494
 495         return 0;
 496 }
 497 EXPORT_SYMBOL(phy_ethtool_get_strings);
 498
 499 /**
 500  * phy_ethtool_get_sset_count - Get the number of statistic counters
 501  *
 502  * @phydev: the phy_device struct
 503  */
 504 int phy_ethtool_get_sset_count(struct phy_device *phydev)
 505 {
 506         int ret;
 507
 508         if (!phydev->drv)
 509                 return -EIO;
 510
 511         if (phydev->drv->get_sset_count &&
 512             phydev->drv->get_strings &&
 513             phydev->drv->get_stats) {
 514                 mutex_lock(&phydev->lock);
 515                 ret = phydev->drv->get_sset_count(phydev);
 516                 mutex_unlock(&phydev->lock);
 517
 518                 return ret;
 519         }
 520
 521         return -EOPNOTSUPP;
 522 }
 523 EXPORT_SYMBOL(phy_ethtool_get_sset_count);
 524
 525 /**
 526  * phy_ethtool_get_stats - Get the statistic counters
 527  *
 528  * @phydev: the phy_device struct
 529  * @stats: What counters to get
 530  * @data: Where to store the counters
 531  */
 532 int phy_ethtool_get_stats(struct phy_device *phydev,
 533                           struct ethtool_stats *stats, u64 *data)
 534 {
 535         if (!phydev->drv)
 536                 return -EIO;
 537
 538         mutex_lock(&phydev->lock);
 539         phydev->drv->get_stats(phydev, stats, data);
 540         mutex_unlock(&phydev->lock);
 541
 542         return 0;
 543 }
 544 EXPORT_SYMBOL(phy_ethtool_get_stats);
 545
 546 /**
 547  * phy_start_cable_test - Start a cable test
 548  *
 549  * @phydev: the phy_device struct
 550  * @extack: extack for reporting useful error messages
 551  */
 552 int phy_start_cable_test(struct phy_device *phydev,
 553                          struct netlink_ext_ack *extack)
 554 {
 555         struct net_device *dev = phydev->attached_dev;
 556         int err = -ENOMEM;
 557
 558         if (!(phydev->drv &&
 559               phydev->drv->cable_test_start &&
 560               phydev->drv->cable_test_get_status)) {
 561                 NL_SET_ERR_MSG(extack,
 562                                "PHY driver does not support cable testing");
 563                 return -EOPNOTSUPP;
 564         }
 565
 566         mutex_lock(&phydev->lock);
 567         if (phydev->state == PHY_CABLETEST) {
 568                 NL_SET_ERR_MSG(extack,
 569                                "PHY already performing a test");
 570                 err = -EBUSY;
 571                 goto out;
 572         }
 573
 574         if (phydev->state < PHY_UP ||
 575             phydev->state > PHY_CABLETEST) {
 576                 NL_SET_ERR_MSG(extack,
 577                                "PHY not configured. Try setting interface up");
 578                 err = -EBUSY;
 579                 goto out;
 580         }
 581
 582         err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
 583         if (err)
 584                 goto out;
 585
 586         /* Mark the carrier down until the test is complete */
 587         phy_link_down(phydev);
 588
 589         netif_testing_on(dev);
 590         err = phydev->drv->cable_test_start(phydev);
 591         if (err) {
 592                 netif_testing_off(dev);
 593                 phy_link_up(phydev);
 594                 goto out_free;
 595         }
 596
 597         phydev->state = PHY_CABLETEST;
 598
 599         if (phy_polling_mode(phydev))
 600                 phy_trigger_machine(phydev);
 601
 602         mutex_unlock(&phydev->lock);
 603
 604         return 0;
 605
 606 out_free:
 607         ethnl_cable_test_free(phydev);
 608 out:
 609         mutex_unlock(&phydev->lock);
 610
 611         return err;
 612 }
 613 EXPORT_SYMBOL(phy_start_cable_test);
 614
 615 /**
 616  * phy_start_cable_test_tdr - Start a raw TDR cable test
 617  *
 618  * @phydev: the phy_device struct
 619  * @extack: extack for reporting useful error messages
 620  * @config: Configuration of the test to run
 621  */
 622 int phy_start_cable_test_tdr(struct phy_device *phydev,
 623                              struct netlink_ext_ack *extack,
 624                              const struct phy_tdr_config *config)
 625 {
 626         struct net_device *dev = phydev->attached_dev;
 627         int err = -ENOMEM;
 628
 629         if (!(phydev->drv &&
 630               phydev->drv->cable_test_tdr_start &&
 631               phydev->drv->cable_test_get_status)) {
 632                 NL_SET_ERR_MSG(extack,
 633                                "PHY driver does not support cable test TDR");
 634                 return -EOPNOTSUPP;
 635         }
 636
 637         mutex_lock(&phydev->lock);
 638         if (phydev->state == PHY_CABLETEST) {
 639                 NL_SET_ERR_MSG(extack,
 640                                "PHY already performing a test");
 641                 err = -EBUSY;
 642                 goto out;
 643         }
 644
 645         if (phydev->state < PHY_UP ||
 646             phydev->state > PHY_CABLETEST) {
 647                 NL_SET_ERR_MSG(extack,
 648                                "PHY not configured. Try setting interface up");
 649                 err = -EBUSY;
 650                 goto out;
 651         }
 652
 653         err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
 654         if (err)
 655                 goto out;
 656
 657         /* Mark the carrier down until the test is complete */
 658         phy_link_down(phydev);
 659
 660         netif_testing_on(dev);
 661         err = phydev->drv->cable_test_tdr_start(phydev, config);
 662         if (err) {
 663                 netif_testing_off(dev);
 664                 phy_link_up(phydev);
 665                 goto out_free;
 666         }
 667
 668         phydev->state = PHY_CABLETEST;
 669
 670         if (phy_polling_mode(phydev))
 671                 phy_trigger_machine(phydev);
 672
 673         mutex_unlock(&phydev->lock);
 674
 675         return 0;
 676
 677 out_free:
 678         ethnl_cable_test_free(phydev);
 679 out:
 680         mutex_unlock(&phydev->lock);
 681
 682         return err;
 683 }
 684 EXPORT_SYMBOL(phy_start_cable_test_tdr);
 685
 686 static int phy_config_aneg(struct phy_device *phydev)
 687 {
 688         if (phydev->drv->config_aneg)
 689                 return phydev->drv->config_aneg(phydev);
 690
 691         /* Clause 45 PHYs that don't implement Clause 22 registers are not
 692          * allowed to call genphy_config_aneg()
 693          */
 694         if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
 695                 return genphy_c45_config_aneg(phydev);
 696
 697         return genphy_config_aneg(phydev);
 698 }
 699
 700 /**
 701  * phy_check_link_status - check link status and set state accordingly
 702  * @phydev: the phy_device struct
 703  *
 704  * Description: Check for link and whether autoneg was triggered / is running
 705  * and set state accordingly
 706  */
 707 static int phy_check_link_status(struct phy_device *phydev)
 708 {
 709         int err;
 710
 711         WARN_ON(!mutex_is_locked(&phydev->lock));
 712
 713         /* Keep previous state if loopback is enabled because some PHYs
 714          * report that Link is Down when loopback is enabled.
 715          */
 716         if (phydev->loopback_enabled)
 717                 return 0;
 718
 719         err = phy_read_status(phydev);
 720         if (err)
 721                 return err;
 722
 723         if (phydev->link && phydev->state != PHY_RUNNING) {
 724                 phy_check_downshift(phydev);
 725                 phydev->state = PHY_RUNNING;
 726                 phy_link_up(phydev);
 727         } else if (!phydev->link && phydev->state != PHY_NOLINK) {
 728                 phydev->state = PHY_NOLINK;
 729                 phy_link_down(phydev);
 730         }
 731
 732         return 0;
 733 }
 734
 735 /**
 736  * _phy_start_aneg - start auto-negotiation for this PHY device
 737  * @phydev: the phy_device struct
 738  *
 739  * Description: Sanitizes the settings (if we're not autonegotiating
 740  *   them), and then calls the driver's config_aneg function.
 741  *   If the PHYCONTROL Layer is operating, we change the state to
 742  *   reflect the beginning of Auto-negotiation or forcing.
 743  */
 744 static int _phy_start_aneg(struct phy_device *phydev)
 745 {
 746         int err;
 747
 748         lockdep_assert_held(&phydev->lock);
 749
 750         if (!phydev->drv)
 751                 return -EIO;
 752
 753         if (AUTONEG_DISABLE == phydev->autoneg)
 754                 phy_sanitize_settings(phydev);
 755
 756         err = phy_config_aneg(phydev);
 757         if (err < 0)
 758                 return err;
 759
 760         if (phy_is_started(phydev))
 761                 err = phy_check_link_status(phydev);
 762
 763         return err;
 764 }
 765
 766 /**
 767  * phy_start_aneg - start auto-negotiation for this PHY device
 768  * @phydev: the phy_device struct
 769  *
 770  * Description: Sanitizes the settings (if we're not autonegotiating
 771  *   them), and then calls the driver's config_aneg function.
 772  *   If the PHYCONTROL Layer is operating, we change the state to
 773  *   reflect the beginning of Auto-negotiation or forcing.
 774  */
 775 int phy_start_aneg(struct phy_device *phydev)
 776 {
 777         int err;
 778
 779         mutex_lock(&phydev->lock);
 780         err = _phy_start_aneg(phydev);
 781         mutex_unlock(&phydev->lock);
 782
 783         return err;
 784 }
 785 EXPORT_SYMBOL(phy_start_aneg);
 786
 787 static int phy_poll_aneg_done(struct phy_device *phydev)
 788 {
 789         unsigned int retries = 100;
 790         int ret;
 791
 792         do {
 793                 msleep(100);
 794                 ret = phy_aneg_done(phydev);
 795         } while (!ret && --retries);
 796
 797         if (!ret)
 798                 return -ETIMEDOUT;
 799
 800         return ret < 0 ? ret : 0;
 801 }
 802
 803 int phy_ethtool_ksettings_set(struct phy_device *phydev,
 804                               const struct ethtool_link_ksettings *cmd)
 805 {
 806         __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
 807         u8 autoneg = cmd->base.autoneg;
 808         u8 duplex = cmd->base.duplex;
 809         u32 speed = cmd->base.speed;
 810
 811         if (cmd->base.phy_address != phydev->mdio.addr)
 812                 return -EINVAL;
 813
 814         linkmode_copy(advertising, cmd->link_modes.advertising);
 815
 816         /* We make sure that we don't pass unsupported values in to the PHY */
 817         linkmode_and(advertising, advertising, phydev->supported);
 818
 819         /* Verify the settings we care about. */
 820         if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
 821                 return -EINVAL;
 822
 823         if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
 824                 return -EINVAL;
 825
 826         if (autoneg == AUTONEG_DISABLE &&
 827             ((speed != SPEED_1000 &&
 828               speed != SPEED_100 &&
 829               speed != SPEED_10) ||
 830              (duplex != DUPLEX_HALF &&
 831               duplex != DUPLEX_FULL)))
 832                 return -EINVAL;
 833
 834         mutex_lock(&phydev->lock);
 835         phydev->autoneg = autoneg;
 836
 837         if (autoneg == AUTONEG_DISABLE) {
 838                 phydev->speed = speed;
 839                 phydev->duplex = duplex;
 840         }
 841
 842         linkmode_copy(phydev->advertising, advertising);
 843
 844         linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
 845                          phydev->advertising, autoneg == AUTONEG_ENABLE);
 846
 847         phydev->master_slave_set = cmd->base.master_slave_cfg;
 848         phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
 849
 850         /* Restart the PHY */
 851         if (phy_is_started(phydev)) {
 852                 phydev->state = PHY_UP;
 853                 phy_trigger_machine(phydev);
 854         } else {
 855                 _phy_start_aneg(phydev);
 856         }
 857
 858         mutex_unlock(&phydev->lock);
 859         return 0;
 860 }
 861 EXPORT_SYMBOL(phy_ethtool_ksettings_set);
 862
 863 /**
 864  * phy_speed_down - set speed to lowest speed supported by both link partners
 865  * @phydev: the phy_device struct
 866  * @sync: perform action synchronously
 867  *
 868  * Description: Typically used to save energy when waiting for a WoL packet
 869  *
 870  * WARNING: Setting sync to false may cause the system being unable to suspend
 871  * in case the PHY generates an interrupt when finishing the autonegotiation.
 872  * This interrupt may wake up the system immediately after suspend.
 873  * Therefore use sync = false only if you're sure it's safe with the respective
 874  * network chip.
 875  */
 876 int phy_speed_down(struct phy_device *phydev, bool sync)
 877 {
 878         __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
 879         int ret;
 880
 881         if (phydev->autoneg != AUTONEG_ENABLE)
 882                 return 0;
 883
 884         linkmode_copy(adv_tmp, phydev->advertising);
 885
 886         ret = phy_speed_down_core(phydev);
 887         if (ret)
 888                 return ret;
 889
 890         linkmode_copy(phydev->adv_old, adv_tmp);
 891
 892         if (linkmode_equal(phydev->advertising, adv_tmp))
 893                 return 0;
 894
 895         ret = phy_config_aneg(phydev);
 896         if (ret)
 897                 return ret;
 898
 899         return sync ? phy_poll_aneg_done(phydev) : 0;
 900 }
 901 EXPORT_SYMBOL_GPL(phy_speed_down);
 902
 903 /**
 904  * phy_speed_up - (re)set advertised speeds to all supported speeds
 905  * @phydev: the phy_device struct
 906  *
 907  * Description: Used to revert the effect of phy_speed_down
 908  */
 909 int phy_speed_up(struct phy_device *phydev)
 910 {
 911         __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
 912
 913         if (phydev->autoneg != AUTONEG_ENABLE)
 914                 return 0;
 915
 916         if (linkmode_empty(phydev->adv_old))
 917                 return 0;
 918
 919         linkmode_copy(adv_tmp, phydev->advertising);
 920         linkmode_copy(phydev->advertising, phydev->adv_old);
 921         linkmode_zero(phydev->adv_old);
 922
 923         if (linkmode_equal(phydev->advertising, adv_tmp))
 924                 return 0;
 925
 926         return phy_config_aneg(phydev);
 927 }
 928 EXPORT_SYMBOL_GPL(phy_speed_up);
 929
 930 /**
 931  * phy_start_machine - start PHY state machine tracking
 932  * @phydev: the phy_device struct
 933  *
 934  * Description: The PHY infrastructure can run a state machine
 935  *   which tracks whether the PHY is starting up, negotiating,
 936  *   etc.  This function starts the delayed workqueue which tracks
 937  *   the state of the PHY. If you want to maintain your own state machine,
 938  *   do not call this function.
 939  */
 940 void phy_start_machine(struct phy_device *phydev)
 941 {
 942         phy_trigger_machine(phydev);
 943 }
 944 EXPORT_SYMBOL_GPL(phy_start_machine);
 945
 946 /**
 947  * phy_stop_machine - stop the PHY state machine tracking
 948  * @phydev: target phy_device struct
 949  *
 950  * Description: Stops the state machine delayed workqueue, sets the
 951  *   state to UP (unless it wasn't up yet). This function must be
 952  *   called BEFORE phy_detach.
 953  */
 954 void phy_stop_machine(struct phy_device *phydev)
 955 {
 956         cancel_delayed_work_sync(&phydev->state_queue);
 957
 958         mutex_lock(&phydev->lock);
 959         if (phy_is_started(phydev))
 960                 phydev->state = PHY_UP;
 961         mutex_unlock(&phydev->lock);
 962 }
 963
 964 /**
 965  * phy_error - enter HALTED state for this PHY device
 966  * @phydev: target phy_device struct
 967  *
 968  * Moves the PHY to the HALTED state in response to a read
 969  * or write error, and tells the controller the link is down.
 970  * Must not be called from interrupt context, or while the
 971  * phydev->lock is held.
 972  */
 973 static void phy_error(struct phy_device *phydev)
 974 {
 975         WARN_ON(1);
 976
 977         mutex_lock(&phydev->lock);
 978         phydev->state = PHY_HALTED;
 979         mutex_unlock(&phydev->lock);
 980
 981         phy_trigger_machine(phydev);
 982 }
 983
 984 /**
 985  * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
 986  * @phydev: target phy_device struct
 987  */
 988 int phy_disable_interrupts(struct phy_device *phydev)
 989 {
 990         int err;
 991
 992         /* Disable PHY interrupts */
 993         err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 994         if (err)
 995                 return err;
 996
 997         /* Clear the interrupt */
 998         return phy_clear_interrupt(phydev);
 999 }
1000
1001 /**
1002  * phy_did_interrupt - Checks if the PHY generated an interrupt
1003  * @phydev: target phy_device struct
1004  */
1005 static int phy_did_interrupt(struct phy_device *phydev)
1006 {
1007         int ret;
1008
1009         mutex_lock(&phydev->lock);
1010         ret = phydev->drv->did_interrupt(phydev);
1011         mutex_unlock(&phydev->lock);
1012
1013         return ret;
1014 }
1015
1016 /**
1017  * phy_handle_interrupt - Handle PHY interrupt
1018  * @phydev: target phy_device struct
1019  */
1020 static irqreturn_t phy_handle_interrupt(struct phy_device *phydev)
1021 {
1022         irqreturn_t ret;
1023
1024         mutex_lock(&phydev->lock);
1025         ret = phydev->drv->handle_interrupt(phydev);
1026         mutex_unlock(&phydev->lock);
1027
1028         return ret;
1029 }
1030
1031 /**
1032  * phy_interrupt - PHY interrupt handler
1033  * @irq: interrupt line
1034  * @phy_dat: phy_device pointer
1035  *
1036  * Description: Handle PHY interrupt
1037  */
1038 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
1039 {
1040         struct phy_device *phydev = phy_dat;
1041         struct phy_driver *drv = phydev->drv;
1042
1043         if (drv->handle_interrupt)
1044                 return phy_handle_interrupt(phydev);
1045
1046         if (drv->did_interrupt && !phy_did_interrupt(phydev))
1047                 return IRQ_NONE;
1048
1049         /* reschedule state queue work to run as soon as possible */
1050         phy_trigger_machine(phydev);
1051
1052         /* did_interrupt() may have cleared the interrupt already */
1053         if (!drv->did_interrupt && phy_clear_interrupt(phydev)) {
1054                 phy_error(phydev);
1055                 return IRQ_NONE;
1056         }
1057
1058         return IRQ_HANDLED;
1059 }
1060
1061 /**
1062  * phy_enable_interrupts - Enable the interrupts from the PHY side
1063  * @phydev: target phy_device struct
1064  */
1065 static int phy_enable_interrupts(struct phy_device *phydev)
1066 {
1067         int err = phy_clear_interrupt(phydev);
1068
1069         if (err < 0)
1070                 return err;
1071
1072         return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
1073 }
1074
1075 /**
1076  * phy_request_interrupt - request and enable interrupt for a PHY device
1077  * @phydev: target phy_device struct
1078  *
1079  * Description: Request and enable the interrupt for the given PHY.
1080  *   If this fails, then we set irq to PHY_POLL.
1081  *   This should only be called with a valid IRQ number.
1082  */
1083 void phy_request_interrupt(struct phy_device *phydev)
1084 {
1085         int err;
1086
1087         err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
1088                                    IRQF_ONESHOT | IRQF_SHARED,
1089                                    phydev_name(phydev), phydev);
1090         if (err) {
1091                 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
1092                             err, phydev->irq);
1093                 phydev->irq = PHY_POLL;
1094         } else {
1095                 if (phy_enable_interrupts(phydev)) {
1096                         phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
1097                         phy_free_interrupt(phydev);
1098                         phydev->irq = PHY_POLL;
1099                 }
1100         }
1101 }
1102 EXPORT_SYMBOL(phy_request_interrupt);
1103
1104 /**
1105  * phy_free_interrupt - disable and free interrupt for a PHY device
1106  * @phydev: target phy_device struct
1107  *
1108  * Description: Disable and free the interrupt for the given PHY.
1109  *   This should only be called with a valid IRQ number.
1110  */
1111 void phy_free_interrupt(struct phy_device *phydev)
1112 {
1113         phy_disable_interrupts(phydev);
1114         free_irq(phydev->irq, phydev);
1115 }
1116 EXPORT_SYMBOL(phy_free_interrupt);
1117
1118 /**
1119  * phy_stop - Bring down the PHY link, and stop checking the status
1120  * @phydev: target phy_device struct
1121  */
1122 void phy_stop(struct phy_device *phydev)
1123 {
1124         struct net_device *dev = phydev->attached_dev;
1125         enum phy_state old_state;
1126
1127         if (!phy_is_started(phydev) && phydev->state != PHY_DOWN) {
1128                 WARN(1, "called from state %s\n",
1129                      phy_state_to_str(phydev->state));
1130                 return;
1131         }
1132
1133         mutex_lock(&phydev->lock);
1134         old_state = phydev->state;
1135
1136         if (phydev->state == PHY_CABLETEST) {
1137                 phy_abort_cable_test(phydev);
1138                 netif_testing_off(dev);
1139         }
1140
1141         if (phydev->sfp_bus)
1142                 sfp_upstream_stop(phydev->sfp_bus);
1143
1144         phydev->state = PHY_HALTED;
1145         phy_process_state_change(phydev, old_state);
1146
1147         mutex_unlock(&phydev->lock);
1148
1149         phy_state_machine(&phydev->state_queue.work);
1150         phy_stop_machine(phydev);
1151
1152         /* Cannot call flush_scheduled_work() here as desired because
1153          * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
1154          * will not reenable interrupts.
1155          */
1156 }
1157 EXPORT_SYMBOL(phy_stop);
1158
1159 /**
1160  * phy_start - start or restart a PHY device
1161  * @phydev: target phy_device struct
1162  *
1163  * Description: Indicates the attached device's readiness to
1164  *   handle PHY-related work.  Used during startup to start the
1165  *   PHY, and after a call to phy_stop() to resume operation.
1166  *   Also used to indicate the MDIO bus has cleared an error
1167  *   condition.
1168  */
1169 void phy_start(struct phy_device *phydev)
1170 {
1171         mutex_lock(&phydev->lock);
1172
1173         if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
1174                 WARN(1, "called from state %s\n",
1175                      phy_state_to_str(phydev->state));
1176                 goto out;
1177         }
1178
1179         if (phydev->sfp_bus)
1180                 sfp_upstream_start(phydev->sfp_bus);
1181
1182         /* if phy was suspended, bring the physical link up again */
1183         __phy_resume(phydev);
1184
1185         phydev->state = PHY_UP;
1186
1187         phy_start_machine(phydev);
1188 out:
1189         mutex_unlock(&phydev->lock);
1190 }
1191 EXPORT_SYMBOL(phy_start);
1192
1193 /**
1194  * phy_state_machine - Handle the state machine
1195  * @work: work_struct that describes the work to be done
1196  */
1197 void phy_state_machine(struct work_struct *work)
1198 {
1199         struct delayed_work *dwork = to_delayed_work(work);
1200         struct phy_device *phydev =
1201                         container_of(dwork, struct phy_device, state_queue);
1202         struct net_device *dev = phydev->attached_dev;
1203         bool needs_aneg = false, do_suspend = false;
1204         enum phy_state old_state;
1205         bool finished = false;
1206         int err = 0;
1207
1208         mutex_lock(&phydev->lock);
1209
1210         old_state = phydev->state;
1211
1212         switch (phydev->state) {
1213         case PHY_DOWN:
1214         case PHY_READY:
1215                 break;
1216         case PHY_UP:
1217                 needs_aneg = true;
1218
1219                 break;
1220         case PHY_NOLINK:
1221         case PHY_RUNNING:
1222                 err = phy_check_link_status(phydev);
1223                 break;
1224         case PHY_CABLETEST:
1225                 err = phydev->drv->cable_test_get_status(phydev, &finished);
1226                 if (err) {
1227                         phy_abort_cable_test(phydev);
1228                         netif_testing_off(dev);
1229                         needs_aneg = true;
1230                         phydev->state = PHY_UP;
1231                         break;
1232                 }
1233
1234                 if (finished) {
1235                         ethnl_cable_test_finished(phydev);
1236                         netif_testing_off(dev);
1237                         needs_aneg = true;
1238                         phydev->state = PHY_UP;
1239                 }
1240                 break;
1241         case PHY_HALTED:
1242                 if (phydev->link) {
1243                         phydev->link = 0;
1244                         phy_link_down(phydev);
1245                 }
1246                 do_suspend = true;
1247                 break;
1248         }
1249
1250         mutex_unlock(&phydev->lock);
1251
1252         if (needs_aneg)
1253                 err = phy_start_aneg(phydev);
1254         else if (do_suspend)
1255                 phy_suspend(phydev);
1256
1257         if (err < 0)
1258                 phy_error(phydev);
1259
1260         phy_process_state_change(phydev, old_state);
1261
1262         /* Only re-schedule a PHY state machine change if we are polling the
1263          * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
1264          * between states from phy_mac_interrupt().
1265          *
1266          * In state PHY_HALTED the PHY gets suspended, so rescheduling the
1267          * state machine would be pointless and possibly error prone when
1268          * called from phy_disconnect() synchronously.
1269          */
1270         mutex_lock(&phydev->lock);
1271         if (phy_polling_mode(phydev) && phy_is_started(phydev))
1272                 phy_queue_state_machine(phydev, PHY_STATE_TIME);
1273         mutex_unlock(&phydev->lock);
1274 }
1275
1276 /**
1277  * phy_mac_interrupt - MAC says the link has changed
1278  * @phydev: phy_device struct with changed link
1279  *
1280  * The MAC layer is able to indicate there has been a change in the PHY link
1281  * status. Trigger the state machine and work a work queue.
1282  */
1283 void phy_mac_interrupt(struct phy_device *phydev)
1284 {
1285         /* Trigger a state machine change */
1286         phy_trigger_machine(phydev);
1287 }
1288 EXPORT_SYMBOL(phy_mac_interrupt);
1289
1290 static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv)
1291 {
1292         linkmode_zero(advertising);
1293
1294         if (eee_adv & MDIO_EEE_100TX)
1295                 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
1296                                  advertising);
1297         if (eee_adv & MDIO_EEE_1000T)
1298                 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
1299                                  advertising);
1300         if (eee_adv & MDIO_EEE_10GT)
1301                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
1302                                  advertising);
1303         if (eee_adv & MDIO_EEE_1000KX)
1304                 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
1305                                  advertising);
1306         if (eee_adv & MDIO_EEE_10GKX4)
1307                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
1308                                  advertising);
1309         if (eee_adv & MDIO_EEE_10GKR)
1310                 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
1311                                  advertising);
1312 }
1313
1314 /**
1315  * phy_init_eee - init and check the EEE feature
1316  * @phydev: target phy_device struct
1317  * @clk_stop_enable: PHY may stop the clock during LPI
1318  *
1319  * Description: it checks if the Energy-Efficient Ethernet (EEE)
1320  * is supported by looking at the MMD registers 3.20 and 7.60/61
1321  * and it programs the MMD register 3.0 setting the "Clock stop enable"
1322  * bit if required.
1323  */
1324 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1325 {
1326         if (!phydev->drv)
1327                 return -EIO;
1328
1329         /* According to 802.3az,the EEE is supported only in full duplex-mode.
1330          */
1331         if (phydev->duplex == DUPLEX_FULL) {
1332                 __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
1333                 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp);
1334                 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv);
1335                 int eee_lp, eee_cap, eee_adv;
1336                 int status;
1337                 u32 cap;
1338
1339                 /* Read phy status to properly get the right settings */
1340                 status = phy_read_status(phydev);
1341                 if (status)
1342                         return status;
1343
1344                 /* First check if the EEE ability is supported */
1345                 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1346                 if (eee_cap <= 0)
1347                         goto eee_exit_err;
1348
1349                 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1350                 if (!cap)
1351                         goto eee_exit_err;
1352
1353                 /* Check which link settings negotiated and verify it in
1354                  * the EEE advertising registers.
1355                  */
1356                 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1357                 if (eee_lp <= 0)
1358                         goto eee_exit_err;
1359
1360                 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1361                 if (eee_adv <= 0)
1362                         goto eee_exit_err;
1363
1364                 mmd_eee_adv_to_linkmode(adv, eee_adv);
1365                 mmd_eee_adv_to_linkmode(lp, eee_lp);
1366                 linkmode_and(common, adv, lp);
1367
1368                 if (!phy_check_valid(phydev->speed, phydev->duplex, common))
1369                         goto eee_exit_err;
1370
1371                 if (clk_stop_enable)
1372                         /* Configure the PHY to stop receiving xMII
1373                          * clock while it is signaling LPI.
1374                          */
1375                         phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
1376                                          MDIO_PCS_CTRL1_CLKSTOP_EN);
1377
1378                 return 0; /* EEE supported */
1379         }
1380 eee_exit_err:
1381         return -EPROTONOSUPPORT;
1382 }
1383 EXPORT_SYMBOL(phy_init_eee);
1384
1385 /**
1386  * phy_get_eee_err - report the EEE wake error count
1387  * @phydev: target phy_device struct
1388  *
1389  * Description: it is to report the number of time where the PHY
1390  * failed to complete its normal wake sequence.
1391  */
1392 int phy_get_eee_err(struct phy_device *phydev)
1393 {
1394         if (!phydev->drv)
1395                 return -EIO;
1396
1397         return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1398 }
1399 EXPORT_SYMBOL(phy_get_eee_err);
1400
1401 /**
1402  * phy_ethtool_get_eee - get EEE supported and status
1403  * @phydev: target phy_device struct
1404  * @data: ethtool_eee data
1405  *
1406  * Description: it reportes the Supported/Advertisement/LP Advertisement
1407  * capabilities.
1408  */
1409 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1410 {
1411         int val;
1412
1413         if (!phydev->drv)
1414                 return -EIO;
1415
1416         /* Get Supported EEE */
1417         val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1418         if (val < 0)
1419                 return val;
1420         data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1421
1422         /* Get advertisement EEE */
1423         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1424         if (val < 0)
1425                 return val;
1426         data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1427         data->eee_enabled = !!data->advertised;
1428
1429         /* Get LP advertisement EEE */
1430         val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1431         if (val < 0)
1432                 return val;
1433         data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1434
1435         data->eee_active = !!(data->advertised & data->lp_advertised);
1436
1437         return 0;
1438 }
1439 EXPORT_SYMBOL(phy_ethtool_get_eee);
1440
1441 /**
1442  * phy_ethtool_set_eee - set EEE supported and status
1443  * @phydev: target phy_device struct
1444  * @data: ethtool_eee data
1445  *
1446  * Description: it is to program the Advertisement EEE register.
1447  */
1448 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1449 {
1450         int cap, old_adv, adv = 0, ret;
1451
1452         if (!phydev->drv)
1453                 return -EIO;
1454
1455         /* Get Supported EEE */
1456         cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1457         if (cap < 0)
1458                 return cap;
1459
1460         old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1461         if (old_adv < 0)
1462                 return old_adv;
1463
1464         if (data->eee_enabled) {
1465                 adv = !data->advertised ? cap :
1466                       ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1467                 /* Mask prohibited EEE modes */
1468                 adv &= ~phydev->eee_broken_modes;
1469         }
1470
1471         if (old_adv != adv) {
1472                 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1473                 if (ret < 0)
1474                         return ret;
1475
1476                 /* Restart autonegotiation so the new modes get sent to the
1477                  * link partner.
1478                  */
1479                 if (phydev->autoneg == AUTONEG_ENABLE) {
1480                         ret = phy_restart_aneg(phydev);
1481                         if (ret < 0)
1482                                 return ret;
1483                 }
1484         }
1485
1486         return 0;
1487 }
1488 EXPORT_SYMBOL(phy_ethtool_set_eee);
1489
1490 /**
1491  * phy_ethtool_set_wol - Configure Wake On LAN
1492  *
1493  * @phydev: target phy_device struct
1494  * @wol: Configuration requested
1495  */
1496 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1497 {
1498         if (phydev->drv && phydev->drv->set_wol)
1499                 return phydev->drv->set_wol(phydev, wol);
1500
1501         return -EOPNOTSUPP;
1502 }
1503 EXPORT_SYMBOL(phy_ethtool_set_wol);
1504
1505 /**
1506  * phy_ethtool_get_wol - Get the current Wake On LAN configuration
1507  *
1508  * @phydev: target phy_device struct
1509  * @wol: Store the current configuration here
1510  */
1511 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1512 {
1513         if (phydev->drv && phydev->drv->get_wol)
1514                 phydev->drv->get_wol(phydev, wol);
1515 }
1516 EXPORT_SYMBOL(phy_ethtool_get_wol);
1517
1518 int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1519                                    struct ethtool_link_ksettings *cmd)
1520 {
1521         struct phy_device *phydev = ndev->phydev;
1522
1523         if (!phydev)
1524                 return -ENODEV;
1525
1526         phy_ethtool_ksettings_get(phydev, cmd);
1527
1528         return 0;
1529 }
1530 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1531
1532 int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1533                                    const struct ethtool_link_ksettings *cmd)
1534 {
1535         struct phy_device *phydev = ndev->phydev;
1536
1537         if (!phydev)
1538                 return -ENODEV;
1539
1540         return phy_ethtool_ksettings_set(phydev, cmd);
1541 }
1542 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1543
1544 /**
1545  * phy_ethtool_nway_reset - Restart auto negotiation
1546  * @ndev: Network device to restart autoneg for
1547  */
1548 int phy_ethtool_nway_reset(struct net_device *ndev)
1549 {
1550         struct phy_device *phydev = ndev->phydev;
1551
1552         if (!phydev)
1553                 return -ENODEV;
1554
1555         if (!phydev->drv)
1556                 return -EIO;
1557
1558         return phy_restart_aneg(phydev);
1559 }
1560 EXPORT_SYMBOL(phy_ethtool_nway_reset);