drivers/net/mdio.c

   1 /*
   2  * mdio.c: Generic support for MDIO-compatible transceivers
   3  * Copyright 2006-2009 Solarflare Communications Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published
   7  * by the Free Software Foundation, incorporated herein by reference.
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/capability.h>
  12 #include <linux/errno.h>
  13 #include <linux/ethtool.h>
  14 #include <linux/mdio.h>
  15 #include <linux/module.h>
  16
  17 MODULE_DESCRIPTION("Generic support for MDIO-compatible transceivers");
  18 MODULE_AUTHOR("Copyright 2006-2009 Solarflare Communications Inc.");
  19 MODULE_LICENSE("GPL");
  20
  21 /**
  22  * mdio45_probe - probe for an MDIO (clause 45) device
  23  * @mdio: MDIO interface
  24  * @prtad: Expected PHY address
  25  *
  26  * This sets @prtad and @mmds in the MDIO interface if successful.
  27  * Returns 0 on success, negative on error.
  28  */
  29 int mdio45_probe(struct mdio_if_info *mdio, int prtad)
  30 {
  31         int mmd, stat2, devs1, devs2;
  32
  33         /* Assume PHY must have at least one of PMA/PMD, WIS, PCS, PHY
  34          * XS or DTE XS; give up if none is present. */
  35         for (mmd = 1; mmd <= 5; mmd++) {
  36                 /* Is this MMD present? */
  37                 stat2 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_STAT2);
  38                 if (stat2 < 0 ||
  39                     (stat2 & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL)
  40                         continue;
  41
  42                 /* It should tell us about all the other MMDs */
  43                 devs1 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_DEVS1);
  44                 devs2 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_DEVS2);
  45                 if (devs1 < 0 || devs2 < 0)
  46                         continue;
  47
  48                 mdio->prtad = prtad;
  49                 mdio->mmds = devs1 | (devs2 << 16);
  50                 return 0;
  51         }
  52
  53         return -ENODEV;
  54 }
  55 EXPORT_SYMBOL(mdio45_probe);
  56
  57 /**
  58  * mdio_set_flag - set or clear flag in an MDIO register
  59  * @mdio: MDIO interface
  60  * @prtad: PHY address
  61  * @devad: MMD address
  62  * @addr: Register address
  63  * @mask: Mask for flag (single bit set)
  64  * @sense: New value of flag
  65  *
  66  * This debounces changes: it does not write the register if the flag
  67  * already has the proper value.  Returns 0 on success, negative on error.
  68  */
  69 int mdio_set_flag(const struct mdio_if_info *mdio,
  70                   int prtad, int devad, u16 addr, int mask,
  71                   bool sense)
  72 {
  73         int old_val = mdio->mdio_read(mdio->dev, prtad, devad, addr);
  74         int new_val;
  75
  76         if (old_val < 0)
  77                 return old_val;
  78         if (sense)
  79                 new_val = old_val | mask;
  80         else
  81                 new_val = old_val & ~mask;
  82         if (old_val == new_val)
  83                 return 0;
  84         return mdio->mdio_write(mdio->dev, prtad, devad, addr, new_val);
  85 }
  86 EXPORT_SYMBOL(mdio_set_flag);
  87
  88 /**
  89  * mdio_link_ok - is link status up/OK
  90  * @mdio: MDIO interface
  91  * @mmd_mask: Mask for MMDs to check
  92  *
  93  * Returns 1 if the PHY reports link status up/OK, 0 otherwise.
  94  * @mmd_mask is normally @mdio->mmds, but if loopback is enabled
  95  * the MMDs being bypassed should be excluded from the mask.
  96  */
  97 int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmd_mask)
  98 {
  99         int devad, reg;
 100
 101         if (!mmd_mask) {
 102                 /* Use absence of XGMII faults in lieu of link state */
 103                 reg = mdio->mdio_read(mdio->dev, mdio->prtad,
 104                                       MDIO_MMD_PHYXS, MDIO_STAT2);
 105                 return reg >= 0 && !(reg & MDIO_STAT2_RXFAULT);
 106         }
 107
 108         for (devad = 0; mmd_mask; devad++) {
 109                 if (mmd_mask & (1 << devad)) {
 110                         mmd_mask &= ~(1 << devad);
 111
 112                         /* Reset the latched status and fault flags */
 113                         mdio->mdio_read(mdio->dev, mdio->prtad,
 114                                         devad, MDIO_STAT1);
 115                         if (devad == MDIO_MMD_PMAPMD || devad == MDIO_MMD_PCS ||
 116                             devad == MDIO_MMD_PHYXS || devad == MDIO_MMD_DTEXS)
 117                                 mdio->mdio_read(mdio->dev, mdio->prtad,
 118                                                 devad, MDIO_STAT2);
 119
 120                         /* Check the current status and fault flags */
 121                         reg = mdio->mdio_read(mdio->dev, mdio->prtad,
 122                                               devad, MDIO_STAT1);
 123                         if (reg < 0 ||
 124                             (reg & (MDIO_STAT1_FAULT | MDIO_STAT1_LSTATUS)) !=
 125                             MDIO_STAT1_LSTATUS)
 126                                 return false;
 127                 }
 128         }
 129
 130         return true;
 131 }
 132 EXPORT_SYMBOL(mdio45_links_ok);
 133
 134 /**
 135  * mdio45_nway_restart - restart auto-negotiation for this interface
 136  * @mdio: MDIO interface
 137  *
 138  * Returns 0 on success, negative on error.
 139  */
 140 int mdio45_nway_restart(const struct mdio_if_info *mdio)
 141 {
 142         if (!(mdio->mmds & MDIO_DEVS_AN))
 143                 return -EOPNOTSUPP;
 144
 145         mdio_set_flag(mdio, mdio->prtad, MDIO_MMD_AN, MDIO_CTRL1,
 146                       MDIO_AN_CTRL1_RESTART, true);
 147         return 0;
 148 }
 149 EXPORT_SYMBOL(mdio45_nway_restart);
 150
 151 static u32 mdio45_get_an(const struct mdio_if_info *mdio, u16 addr)
 152 {
 153         u32 result = 0;
 154         int reg;
 155
 156         reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN, addr);
 157         if (reg & ADVERTISE_10HALF)
 158                 result |= ADVERTISED_10baseT_Half;
 159         if (reg & ADVERTISE_10FULL)
 160                 result |= ADVERTISED_10baseT_Full;
 161         if (reg & ADVERTISE_100HALF)
 162                 result |= ADVERTISED_100baseT_Half;
 163         if (reg & ADVERTISE_100FULL)
 164                 result |= ADVERTISED_100baseT_Full;
 165         if (reg & ADVERTISE_PAUSE_CAP)
 166                 result |= ADVERTISED_Pause;
 167         if (reg & ADVERTISE_PAUSE_ASYM)
 168                 result |= ADVERTISED_Asym_Pause;
 169         return result;
 170 }
 171
 172 /**
 173  * mdio45_ethtool_gset_npage - get settings for ETHTOOL_GSET
 174  * @mdio: MDIO interface
 175  * @ecmd: Ethtool request structure
 176  * @npage_adv: Modes currently advertised on next pages
 177  * @npage_lpa: Modes advertised by link partner on next pages
 178  *
 179  * The @ecmd parameter is expected to have been cleared before calling
 180  * mdio45_ethtool_gset_npage().
 181  *
 182  * Since the CSRs for auto-negotiation using next pages are not fully
 183  * standardised, this function does not attempt to decode them.  The
 184  * caller must pass them in.
 185  */
 186 void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
 187                                struct ethtool_cmd *ecmd,
 188                                u32 npage_adv, u32 npage_lpa)
 189 {
 190         int reg;
 191         u32 speed;
 192
 193         BUILD_BUG_ON(MDIO_SUPPORTS_C22 != ETH_MDIO_SUPPORTS_C22);
 194         BUILD_BUG_ON(MDIO_SUPPORTS_C45 != ETH_MDIO_SUPPORTS_C45);
 195
 196         ecmd->transceiver = XCVR_INTERNAL;
 197         ecmd->phy_address = mdio->prtad;
 198         ecmd->mdio_support =
 199                 mdio->mode_support & (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22);
 200
 201         reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
 202                               MDIO_CTRL2);
 203         switch (reg & MDIO_PMA_CTRL2_TYPE) {
 204         case MDIO_PMA_CTRL2_10GBT:
 205         case MDIO_PMA_CTRL2_1000BT:
 206         case MDIO_PMA_CTRL2_100BTX:
 207         case MDIO_PMA_CTRL2_10BT:
 208                 ecmd->port = PORT_TP;
 209                 ecmd->supported = SUPPORTED_TP;
 210                 reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
 211                                       MDIO_SPEED);
 212                 if (reg & MDIO_SPEED_10G)
 213                         ecmd->supported |= SUPPORTED_10000baseT_Full;
 214                 if (reg & MDIO_PMA_SPEED_1000)
 215                         ecmd->supported |= (SUPPORTED_1000baseT_Full |
 216                                             SUPPORTED_1000baseT_Half);
 217                 if (reg & MDIO_PMA_SPEED_100)
 218                         ecmd->supported |= (SUPPORTED_100baseT_Full |
 219                                             SUPPORTED_100baseT_Half);
 220                 if (reg & MDIO_PMA_SPEED_10)
 221                         ecmd->supported |= (SUPPORTED_10baseT_Full |
 222                                             SUPPORTED_10baseT_Half);
 223                 ecmd->advertising = ADVERTISED_TP;
 224                 break;
 225
 226         case MDIO_PMA_CTRL2_10GBCX4:
 227                 ecmd->port = PORT_OTHER;
 228                 ecmd->supported = 0;
 229                 ecmd->advertising = 0;
 230                 break;
 231
 232         case MDIO_PMA_CTRL2_10GBKX4:
 233         case MDIO_PMA_CTRL2_10GBKR:
 234         case MDIO_PMA_CTRL2_1000BKX:
 235                 ecmd->port = PORT_OTHER;
 236                 ecmd->supported = SUPPORTED_Backplane;
 237                 reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
 238                                       MDIO_PMA_EXTABLE);
 239                 if (reg & MDIO_PMA_EXTABLE_10GBKX4)
 240                         ecmd->supported |= SUPPORTED_10000baseKX4_Full;
 241                 if (reg & MDIO_PMA_EXTABLE_10GBKR)
 242                         ecmd->supported |= SUPPORTED_10000baseKR_Full;
 243                 if (reg & MDIO_PMA_EXTABLE_1000BKX)
 244                         ecmd->supported |= SUPPORTED_1000baseKX_Full;
 245                 reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
 246                                       MDIO_PMA_10GBR_FECABLE);
 247                 if (reg & MDIO_PMA_10GBR_FECABLE_ABLE)
 248                         ecmd->supported |= SUPPORTED_10000baseR_FEC;
 249                 ecmd->advertising = ADVERTISED_Backplane;
 250                 break;
 251
 252         /* All the other defined modes are flavours of optical */
 253         default:
 254                 ecmd->port = PORT_FIBRE;
 255                 ecmd->supported = SUPPORTED_FIBRE;
 256                 ecmd->advertising = ADVERTISED_FIBRE;
 257                 break;
 258         }
 259
 260         if (mdio->mmds & MDIO_DEVS_AN) {
 261                 ecmd->supported |= SUPPORTED_Autoneg;
 262                 reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
 263                                       MDIO_CTRL1);
 264                 if (reg & MDIO_AN_CTRL1_ENABLE) {
 265                         ecmd->autoneg = AUTONEG_ENABLE;
 266                         ecmd->advertising |=
 267                                 ADVERTISED_Autoneg |
 268                                 mdio45_get_an(mdio, MDIO_AN_ADVERTISE) |
 269                                 npage_adv;
 270                 } else {
 271                         ecmd->autoneg = AUTONEG_DISABLE;
 272                 }
 273         } else {
 274                 ecmd->autoneg = AUTONEG_DISABLE;
 275         }
 276
 277         if (ecmd->autoneg) {
 278                 u32 modes = 0;
 279                 int an_stat = mdio->mdio_read(mdio->dev, mdio->prtad,
 280                                               MDIO_MMD_AN, MDIO_STAT1);
 281
 282                 /* If AN is complete and successful, report best common
 283                  * mode, otherwise report best advertised mode. */
 284                 if (an_stat & MDIO_AN_STAT1_COMPLETE) {
 285                         ecmd->lp_advertising =
 286                                 mdio45_get_an(mdio, MDIO_AN_LPA) | npage_lpa;
 287                         if (an_stat & MDIO_AN_STAT1_LPABLE)
 288                                 ecmd->lp_advertising |= ADVERTISED_Autoneg;
 289                         modes = ecmd->advertising & ecmd->lp_advertising;
 290                 }
 291                 if ((modes & ~ADVERTISED_Autoneg) == 0)
 292                         modes = ecmd->advertising;
 293
 294                 if (modes & (ADVERTISED_10000baseT_Full |
 295                              ADVERTISED_10000baseKX4_Full |
 296                              ADVERTISED_10000baseKR_Full)) {
 297                         speed = SPEED_10000;
 298                         ecmd->duplex = DUPLEX_FULL;
 299                 } else if (modes & (ADVERTISED_1000baseT_Full |
 300                                     ADVERTISED_1000baseT_Half |
 301                                     ADVERTISED_1000baseKX_Full)) {
 302                         speed = SPEED_1000;
 303                         ecmd->duplex = !(modes & ADVERTISED_1000baseT_Half);
 304                 } else if (modes & (ADVERTISED_100baseT_Full |
 305                                     ADVERTISED_100baseT_Half)) {
 306                         speed = SPEED_100;
 307                         ecmd->duplex = !!(modes & ADVERTISED_100baseT_Full);
 308                 } else {
 309                         speed = SPEED_10;
 310                         ecmd->duplex = !!(modes & ADVERTISED_10baseT_Full);
 311                 }
 312         } else {
 313                 /* Report forced settings */
 314                 reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
 315                                       MDIO_CTRL1);
 316                 speed = (((reg & MDIO_PMA_CTRL1_SPEED1000) ? 100 : 1)
 317                          * ((reg & MDIO_PMA_CTRL1_SPEED100) ? 100 : 10));
 318                 ecmd->duplex = (reg & MDIO_CTRL1_FULLDPLX ||
 319                                 speed == SPEED_10000);
 320         }
 321
 322         ethtool_cmd_speed_set(ecmd, speed);
 323
 324         /* 10GBASE-T MDI/MDI-X */
 325         if (ecmd->port == PORT_TP
 326             && (ethtool_cmd_speed(ecmd) == SPEED_10000)) {
 327                 switch (mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
 328                                         MDIO_PMA_10GBT_SWAPPOL)) {
 329                 case MDIO_PMA_10GBT_SWAPPOL_ABNX | MDIO_PMA_10GBT_SWAPPOL_CDNX:
 330                         ecmd->eth_tp_mdix = ETH_TP_MDI;
 331                         break;
 332                 case 0:
 333                         ecmd->eth_tp_mdix = ETH_TP_MDI_X;
 334                         break;
 335                 default:
 336                         /* It's complicated... */
 337                         ecmd->eth_tp_mdix = ETH_TP_MDI_INVALID;
 338                         break;
 339                 }
 340         }
 341 }
 342 EXPORT_SYMBOL(mdio45_ethtool_gset_npage);
 343
 344 /**
 345  * mdio45_ethtool_ksettings_get_npage - get settings for ETHTOOL_GLINKSETTINGS
 346  * @mdio: MDIO interface
 347  * @cmd: Ethtool request structure
 348  * @npage_adv: Modes currently advertised on next pages
 349  * @npage_lpa: Modes advertised by link partner on next pages
 350  *
 351  * The @cmd parameter is expected to have been cleared before calling
 352  * mdio45_ethtool_ksettings_get_npage().
 353  *
 354  * Since the CSRs for auto-negotiation using next pages are not fully
 355  * standardised, this function does not attempt to decode them.  The
 356  * caller must pass them in.
 357  */
 358 void mdio45_ethtool_ksettings_get_npage(const struct mdio_if_info *mdio,
 359                                         struct ethtool_link_ksettings *cmd,
 360                                         u32 npage_adv, u32 npage_lpa)
 361 {
 362         int reg;
 363         u32 speed, supported = 0, advertising = 0, lp_advertising = 0;
 364
 365         BUILD_BUG_ON(MDIO_SUPPORTS_C22 != ETH_MDIO_SUPPORTS_C22);
 366         BUILD_BUG_ON(MDIO_SUPPORTS_C45 != ETH_MDIO_SUPPORTS_C45);
 367
 368         cmd->base.phy_address = mdio->prtad;
 369         cmd->base.mdio_support =
 370                 mdio->mode_support & (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22);
 371
 372         reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
 373                               MDIO_CTRL2);
 374         switch (reg & MDIO_PMA_CTRL2_TYPE) {
 375         case MDIO_PMA_CTRL2_10GBT:
 376         case MDIO_PMA_CTRL2_1000BT:
 377         case MDIO_PMA_CTRL2_100BTX:
 378         case MDIO_PMA_CTRL2_10BT:
 379                 cmd->base.port = PORT_TP;
 380                 supported = SUPPORTED_TP;
 381                 reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
 382                                       MDIO_SPEED);
 383                 if (reg & MDIO_SPEED_10G)
 384                         supported |= SUPPORTED_10000baseT_Full;
 385                 if (reg & MDIO_PMA_SPEED_1000)
 386                         supported |= (SUPPORTED_1000baseT_Full |
 387                                             SUPPORTED_1000baseT_Half);
 388                 if (reg & MDIO_PMA_SPEED_100)
 389                         supported |= (SUPPORTED_100baseT_Full |
 390                                             SUPPORTED_100baseT_Half);
 391                 if (reg & MDIO_PMA_SPEED_10)
 392                         supported |= (SUPPORTED_10baseT_Full |
 393                                             SUPPORTED_10baseT_Half);
 394                 advertising = ADVERTISED_TP;
 395                 break;
 396
 397         case MDIO_PMA_CTRL2_10GBCX4:
 398                 cmd->base.port = PORT_OTHER;
 399                 supported = 0;
 400                 advertising = 0;
 401                 break;
 402
 403         case MDIO_PMA_CTRL2_10GBKX4:
 404         case MDIO_PMA_CTRL2_10GBKR:
 405         case MDIO_PMA_CTRL2_1000BKX:
 406                 cmd->base.port = PORT_OTHER;
 407                 supported = SUPPORTED_Backplane;
 408                 reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
 409                                       MDIO_PMA_EXTABLE);
 410                 if (reg & MDIO_PMA_EXTABLE_10GBKX4)
 411                         supported |= SUPPORTED_10000baseKX4_Full;
 412                 if (reg & MDIO_PMA_EXTABLE_10GBKR)
 413                         supported |= SUPPORTED_10000baseKR_Full;
 414                 if (reg & MDIO_PMA_EXTABLE_1000BKX)
 415                         supported |= SUPPORTED_1000baseKX_Full;
 416                 reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
 417                                       MDIO_PMA_10GBR_FECABLE);
 418                 if (reg & MDIO_PMA_10GBR_FECABLE_ABLE)
 419                         supported |= SUPPORTED_10000baseR_FEC;
 420                 advertising = ADVERTISED_Backplane;
 421                 break;
 422
 423         /* All the other defined modes are flavours of optical */
 424         default:
 425                 cmd->base.port = PORT_FIBRE;
 426                 supported = SUPPORTED_FIBRE;
 427                 advertising = ADVERTISED_FIBRE;
 428                 break;
 429         }
 430
 431         if (mdio->mmds & MDIO_DEVS_AN) {
 432                 supported |= SUPPORTED_Autoneg;
 433                 reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
 434                                       MDIO_CTRL1);
 435                 if (reg & MDIO_AN_CTRL1_ENABLE) {
 436                         cmd->base.autoneg = AUTONEG_ENABLE;
 437                         advertising |=
 438                                 ADVERTISED_Autoneg |
 439                                 mdio45_get_an(mdio, MDIO_AN_ADVERTISE) |
 440                                 npage_adv;
 441                 } else {
 442                         cmd->base.autoneg = AUTONEG_DISABLE;
 443                 }
 444         } else {
 445                 cmd->base.autoneg = AUTONEG_DISABLE;
 446         }
 447
 448         if (cmd->base.autoneg) {
 449                 u32 modes = 0;
 450                 int an_stat = mdio->mdio_read(mdio->dev, mdio->prtad,
 451                                               MDIO_MMD_AN, MDIO_STAT1);
 452
 453                 /* If AN is complete and successful, report best common
 454                  * mode, otherwise report best advertised mode.
 455                  */
 456                 if (an_stat & MDIO_AN_STAT1_COMPLETE) {
 457                         lp_advertising =
 458                                 mdio45_get_an(mdio, MDIO_AN_LPA) | npage_lpa;
 459                         if (an_stat & MDIO_AN_STAT1_LPABLE)
 460                                 lp_advertising |= ADVERTISED_Autoneg;
 461                         modes = advertising & lp_advertising;
 462                 }
 463                 if ((modes & ~ADVERTISED_Autoneg) == 0)
 464                         modes = advertising;
 465
 466                 if (modes & (ADVERTISED_10000baseT_Full |
 467                              ADVERTISED_10000baseKX4_Full |
 468                              ADVERTISED_10000baseKR_Full)) {
 469                         speed = SPEED_10000;
 470                         cmd->base.duplex = DUPLEX_FULL;
 471                 } else if (modes & (ADVERTISED_1000baseT_Full |
 472                                     ADVERTISED_1000baseT_Half |
 473                                     ADVERTISED_1000baseKX_Full)) {
 474                         speed = SPEED_1000;
 475                         cmd->base.duplex = !(modes & ADVERTISED_1000baseT_Half);
 476                 } else if (modes & (ADVERTISED_100baseT_Full |
 477                                     ADVERTISED_100baseT_Half)) {
 478                         speed = SPEED_100;
 479                         cmd->base.duplex = !!(modes & ADVERTISED_100baseT_Full);
 480                 } else {
 481                         speed = SPEED_10;
 482                         cmd->base.duplex = !!(modes & ADVERTISED_10baseT_Full);
 483                 }
 484         } else {
 485                 /* Report forced settings */
 486                 reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
 487                                       MDIO_CTRL1);
 488                 speed = (((reg & MDIO_PMA_CTRL1_SPEED1000) ? 100 : 1)
 489                          * ((reg & MDIO_PMA_CTRL1_SPEED100) ? 100 : 10));
 490                 cmd->base.duplex = (reg & MDIO_CTRL1_FULLDPLX ||
 491                                     speed == SPEED_10000);
 492         }
 493
 494         cmd->base.speed = speed;
 495
 496         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
 497                                                 supported);
 498         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
 499                                                 advertising);
 500         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
 501                                                 lp_advertising);
 502
 503         /* 10GBASE-T MDI/MDI-X */
 504         if (cmd->base.port == PORT_TP && (cmd->base.speed == SPEED_10000)) {
 505                 switch (mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
 506                                         MDIO_PMA_10GBT_SWAPPOL)) {
 507                 case MDIO_PMA_10GBT_SWAPPOL_ABNX | MDIO_PMA_10GBT_SWAPPOL_CDNX:
 508                         cmd->base.eth_tp_mdix = ETH_TP_MDI;
 509                         break;
 510                 case 0:
 511                         cmd->base.eth_tp_mdix = ETH_TP_MDI_X;
 512                         break;
 513                 default:
 514                         /* It's complicated... */
 515                         cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
 516                         break;
 517                 }
 518         }
 519 }
 520 EXPORT_SYMBOL(mdio45_ethtool_ksettings_get_npage);
 521
 522 /**
 523  * mdio_mii_ioctl - MII ioctl interface for MDIO (clause 22 or 45) PHYs
 524  * @mdio: MDIO interface
 525  * @mii_data: MII ioctl data structure
 526  * @cmd: MII ioctl command
 527  *
 528  * Returns 0 on success, negative on error.
 529  */
 530 int mdio_mii_ioctl(const struct mdio_if_info *mdio,
 531                    struct mii_ioctl_data *mii_data, int cmd)
 532 {
 533         int prtad, devad;
 534         u16 addr = mii_data->reg_num;
 535
 536         /* Validate/convert cmd to one of SIOC{G,S}MIIREG */
 537         switch (cmd) {
 538         case SIOCGMIIPHY:
 539                 if (mdio->prtad == MDIO_PRTAD_NONE)
 540                         return -EOPNOTSUPP;
 541                 mii_data->phy_id = mdio->prtad;
 542                 cmd = SIOCGMIIREG;
 543                 break;
 544         case SIOCGMIIREG:
 545         case SIOCSMIIREG:
 546                 break;
 547         default:
 548                 return -EOPNOTSUPP;
 549         }
 550
 551         /* Validate/convert phy_id */
 552         if ((mdio->mode_support & MDIO_SUPPORTS_C45) &&
 553             mdio_phy_id_is_c45(mii_data->phy_id)) {
 554                 prtad = mdio_phy_id_prtad(mii_data->phy_id);
 555                 devad = mdio_phy_id_devad(mii_data->phy_id);
 556         } else if ((mdio->mode_support & MDIO_SUPPORTS_C22) &&
 557                    mii_data->phy_id < 0x20) {
 558                 prtad = mii_data->phy_id;
 559                 devad = MDIO_DEVAD_NONE;
 560                 addr &= 0x1f;
 561         } else if ((mdio->mode_support & MDIO_EMULATE_C22) &&
 562                    mdio->prtad != MDIO_PRTAD_NONE &&
 563                    mii_data->phy_id == mdio->prtad) {
 564                 /* Remap commonly-used MII registers. */
 565                 prtad = mdio->prtad;
 566                 switch (addr) {
 567                 case MII_BMCR:
 568                 case MII_BMSR:
 569                 case MII_PHYSID1:
 570                 case MII_PHYSID2:
 571                         devad = __ffs(mdio->mmds);
 572                         break;
 573                 case MII_ADVERTISE:
 574                 case MII_LPA:
 575                         if (!(mdio->mmds & MDIO_DEVS_AN))
 576                                 return -EINVAL;
 577                         devad = MDIO_MMD_AN;
 578                         if (addr == MII_ADVERTISE)
 579                                 addr = MDIO_AN_ADVERTISE;
 580                         else
 581                                 addr = MDIO_AN_LPA;
 582                         break;
 583                 default:
 584                         return -EINVAL;
 585                 }
 586         } else {
 587                 return -EINVAL;
 588         }
 589
 590         if (cmd == SIOCGMIIREG) {
 591                 int rc = mdio->mdio_read(mdio->dev, prtad, devad, addr);
 592                 if (rc < 0)
 593                         return rc;
 594                 mii_data->val_out = rc;
 595                 return 0;
 596         } else {
 597                 return mdio->mdio_write(mdio->dev, prtad, devad, addr,
 598                                         mii_data->val_in);
 599         }
 600 }
 601 EXPORT_SYMBOL(mdio_mii_ioctl);