drivers/net/phy/marvell.c

   1 /*
   2  * drivers/net/phy/marvell.c
   3  *
   4  * Driver for Marvell PHYs
   5  *
   6  * Author: Andy Fleming
   7  *
   8  * Copyright (c) 2004 Freescale Semiconductor, Inc.
   9  *
  10  * This program is free software; you can redistribute  it and/or modify it
  11  * under  the terms of  the GNU General  Public License as published by the
  12  * Free Software Foundation;  either version 2 of the  License, or (at your
  13  * option) any later version.
  14  *
  15  */
  16 #include <linux/kernel.h>
  17 #include <linux/string.h>
  18 #include <linux/errno.h>
  19 #include <linux/unistd.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/init.h>
  22 #include <linux/delay.h>
  23 #include <linux/netdevice.h>
  24 #include <linux/etherdevice.h>
  25 #include <linux/skbuff.h>
  26 #include <linux/spinlock.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
  33 #include <asm/io.h>
  34 #include <asm/irq.h>
  35 #include <asm/uaccess.h>
  36
  37 #define MII_M1011_IEVENT                0x13
  38 #define MII_M1011_IEVENT_CLEAR          0x0000
  39
  40 #define MII_M1011_IMASK                 0x12
  41 #define MII_M1011_IMASK_INIT            0x6400
  42 #define MII_M1011_IMASK_CLEAR           0x0000
  43
  44 #define MII_M1011_PHY_SCR               0x10
  45 #define MII_M1011_PHY_SCR_AUTO_CROSS    0x0060
  46
  47 #define MII_M1145_PHY_EXT_CR            0x14
  48 #define MII_M1145_RGMII_RX_DELAY        0x0080
  49 #define MII_M1145_RGMII_TX_DELAY        0x0002
  50
  51 #define M1145_DEV_FLAGS_RESISTANCE      0x00000001
  52
  53 #define MII_M1111_PHY_LED_CONTROL       0x18
  54 #define MII_M1111_PHY_LED_DIRECT        0x4100
  55 #define MII_M1111_PHY_LED_COMBINE       0x411c
  56 #define MII_M1111_PHY_EXT_CR            0x14
  57 #define MII_M1111_RX_DELAY              0x80
  58 #define MII_M1111_TX_DELAY              0x2
  59 #define MII_M1111_PHY_EXT_SR            0x1b
  60
  61 #define MII_M1111_HWCFG_MODE_MASK               0xf
  62 #define MII_M1111_HWCFG_MODE_COPPER_RGMII       0xb
  63 #define MII_M1111_HWCFG_MODE_FIBER_RGMII        0x3
  64 #define MII_M1111_HWCFG_MODE_SGMII_NO_CLK       0x4
  65 #define MII_M1111_HWCFG_MODE_COPPER_RTBI        0x9
  66 #define MII_M1111_HWCFG_FIBER_COPPER_AUTO       0x8000
  67 #define MII_M1111_HWCFG_FIBER_COPPER_RES        0x2000
  68
  69 #define MII_M1111_COPPER                0
  70 #define MII_M1111_FIBER                 1
  71
  72 #define MII_88E1121_PHY_LED_CTRL        16
  73 #define MII_88E1121_PHY_LED_PAGE        3
  74 #define MII_88E1121_PHY_LED_DEF         0x0030
  75 #define MII_88E1121_PHY_PAGE            22
  76
  77 #define MII_M1011_PHY_STATUS            0x11
  78 #define MII_M1011_PHY_STATUS_1000       0x8000
  79 #define MII_M1011_PHY_STATUS_100        0x4000
  80 #define MII_M1011_PHY_STATUS_SPD_MASK   0xc000
  81 #define MII_M1011_PHY_STATUS_FULLDUPLEX 0x2000
  82 #define MII_M1011_PHY_STATUS_RESOLVED   0x0800
  83 #define MII_M1011_PHY_STATUS_LINK       0x0400
  84
  85
  86 MODULE_DESCRIPTION("Marvell PHY driver");
  87 MODULE_AUTHOR("Andy Fleming");
  88 MODULE_LICENSE("GPL");
  89
  90 static int marvell_ack_interrupt(struct phy_device *phydev)
  91 {
  92         int err;
  93
  94         /* Clear the interrupts by reading the reg */
  95         err = phy_read(phydev, MII_M1011_IEVENT);
  96
  97         if (err < 0)
  98                 return err;
  99
 100         return 0;
 101 }
 102
 103 static int marvell_config_intr(struct phy_device *phydev)
 104 {
 105         int err;
 106
 107         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
 108                 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_INIT);
 109         else
 110                 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_CLEAR);
 111
 112         return err;
 113 }
 114
 115 static int marvell_config_aneg(struct phy_device *phydev)
 116 {
 117         int err;
 118
 119         /* The Marvell PHY has an errata which requires
 120          * that certain registers get written in order
 121          * to restart autonegotiation */
 122         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 123
 124         if (err < 0)
 125                 return err;
 126
 127         err = phy_write(phydev, 0x1d, 0x1f);
 128         if (err < 0)
 129                 return err;
 130
 131         err = phy_write(phydev, 0x1e, 0x200c);
 132         if (err < 0)
 133                 return err;
 134
 135         err = phy_write(phydev, 0x1d, 0x5);
 136         if (err < 0)
 137                 return err;
 138
 139         err = phy_write(phydev, 0x1e, 0);
 140         if (err < 0)
 141                 return err;
 142
 143         err = phy_write(phydev, 0x1e, 0x100);
 144         if (err < 0)
 145                 return err;
 146
 147         err = phy_write(phydev, MII_M1011_PHY_SCR,
 148                         MII_M1011_PHY_SCR_AUTO_CROSS);
 149         if (err < 0)
 150                 return err;
 151
 152         err = phy_write(phydev, MII_M1111_PHY_LED_CONTROL,
 153                         MII_M1111_PHY_LED_DIRECT);
 154         if (err < 0)
 155                 return err;
 156
 157         err = genphy_config_aneg(phydev);
 158         if (err < 0)
 159                 return err;
 160
 161         if (phydev->autoneg != AUTONEG_ENABLE) {
 162                 int bmcr;
 163
 164                 /*
 165                  * A write to speed/duplex bits (that is performed by
 166                  * genphy_config_aneg() call above) must be followed by
 167                  * a software reset. Otherwise, the write has no effect.
 168                  */
 169                 bmcr = phy_read(phydev, MII_BMCR);
 170                 if (bmcr < 0)
 171                         return bmcr;
 172
 173                 err = phy_write(phydev, MII_BMCR, bmcr | BMCR_RESET);
 174                 if (err < 0)
 175                         return err;
 176         }
 177
 178         return 0;
 179 }
 180
 181 static int m88e1121_config_aneg(struct phy_device *phydev)
 182 {
 183         int err, temp;
 184
 185         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 186         if (err < 0)
 187                 return err;
 188
 189         err = phy_write(phydev, MII_M1011_PHY_SCR,
 190                         MII_M1011_PHY_SCR_AUTO_CROSS);
 191         if (err < 0)
 192                 return err;
 193
 194         temp = phy_read(phydev, MII_88E1121_PHY_PAGE);
 195
 196         phy_write(phydev, MII_88E1121_PHY_PAGE, MII_88E1121_PHY_LED_PAGE);
 197         phy_write(phydev, MII_88E1121_PHY_LED_CTRL, MII_88E1121_PHY_LED_DEF);
 198         phy_write(phydev, MII_88E1121_PHY_PAGE, temp);
 199
 200         err = genphy_config_aneg(phydev);
 201
 202         return err;
 203 }
 204
 205 static int m88e1111_config_init(struct phy_device *phydev)
 206 {
 207         int err;
 208         int temp;
 209
 210         /* Enable Fiber/Copper auto selection */
 211         temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
 212         temp &= ~MII_M1111_HWCFG_FIBER_COPPER_AUTO;
 213         phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
 214
 215         temp = phy_read(phydev, MII_BMCR);
 216         temp |= BMCR_RESET;
 217         phy_write(phydev, MII_BMCR, temp);
 218
 219         if ((phydev->interface == PHY_INTERFACE_MODE_RGMII) ||
 220             (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) ||
 221             (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) ||
 222             (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)) {
 223
 224                 temp = phy_read(phydev, MII_M1111_PHY_EXT_CR);
 225                 if (temp < 0)
 226                         return temp;
 227
 228                 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
 229                         temp |= (MII_M1111_RX_DELAY | MII_M1111_TX_DELAY);
 230                 } else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
 231                         temp &= ~MII_M1111_TX_DELAY;
 232                         temp |= MII_M1111_RX_DELAY;
 233                 } else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
 234                         temp &= ~MII_M1111_RX_DELAY;
 235                         temp |= MII_M1111_TX_DELAY;
 236                 }
 237
 238                 err = phy_write(phydev, MII_M1111_PHY_EXT_CR, temp);
 239                 if (err < 0)
 240                         return err;
 241
 242                 temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
 243                 if (temp < 0)
 244                         return temp;
 245
 246                 temp &= ~(MII_M1111_HWCFG_MODE_MASK);
 247
 248                 if (temp & MII_M1111_HWCFG_FIBER_COPPER_RES)
 249                         temp |= MII_M1111_HWCFG_MODE_FIBER_RGMII;
 250                 else
 251                         temp |= MII_M1111_HWCFG_MODE_COPPER_RGMII;
 252
 253                 err = phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
 254                 if (err < 0)
 255                         return err;
 256         }
 257
 258         if (phydev->interface == PHY_INTERFACE_MODE_SGMII) {
 259                 temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
 260                 if (temp < 0)
 261                         return temp;
 262
 263                 temp &= ~(MII_M1111_HWCFG_MODE_MASK);
 264                 temp |= MII_M1111_HWCFG_MODE_SGMII_NO_CLK;
 265                 temp |= MII_M1111_HWCFG_FIBER_COPPER_AUTO;
 266
 267                 err = phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
 268                 if (err < 0)
 269                         return err;
 270         }
 271
 272         if (phydev->interface == PHY_INTERFACE_MODE_RTBI) {
 273                 temp = phy_read(phydev, MII_M1111_PHY_EXT_CR);
 274                 if (temp < 0)
 275                         return temp;
 276                 temp |= (MII_M1111_RX_DELAY | MII_M1111_TX_DELAY);
 277                 err = phy_write(phydev, MII_M1111_PHY_EXT_CR, temp);
 278                 if (err < 0)
 279                         return err;
 280
 281                 temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
 282                 if (temp < 0)
 283                         return temp;
 284                 temp &= ~(MII_M1111_HWCFG_MODE_MASK | MII_M1111_HWCFG_FIBER_COPPER_RES);
 285                 temp |= 0x7 | MII_M1111_HWCFG_FIBER_COPPER_AUTO;
 286                 err = phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
 287                 if (err < 0)
 288                         return err;
 289
 290                 /* soft reset */
 291                 err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 292                 if (err < 0)
 293                         return err;
 294                 do
 295                         temp = phy_read(phydev, MII_BMCR);
 296                 while (temp & BMCR_RESET);
 297
 298                 temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
 299                 if (temp < 0)
 300                         return temp;
 301                 temp &= ~(MII_M1111_HWCFG_MODE_MASK | MII_M1111_HWCFG_FIBER_COPPER_RES);
 302                 temp |= MII_M1111_HWCFG_MODE_COPPER_RTBI | MII_M1111_HWCFG_FIBER_COPPER_AUTO;
 303                 err = phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
 304                 if (err < 0)
 305                         return err;
 306         }
 307
 308
 309         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 310         if (err < 0)
 311                 return err;
 312
 313         return 0;
 314 }
 315
 316 static int m88e1118_config_aneg(struct phy_device *phydev)
 317 {
 318         int err;
 319
 320         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 321         if (err < 0)
 322                 return err;
 323
 324         err = phy_write(phydev, MII_M1011_PHY_SCR,
 325                         MII_M1011_PHY_SCR_AUTO_CROSS);
 326         if (err < 0)
 327                 return err;
 328
 329         err = genphy_config_aneg(phydev);
 330         return 0;
 331 }
 332
 333 static int m88e1118_config_init(struct phy_device *phydev)
 334 {
 335         int err;
 336
 337         /* Change address */
 338         err = phy_write(phydev, 0x16, 0x0002);
 339         if (err < 0)
 340                 return err;
 341
 342         /* Enable 1000 Mbit */
 343         err = phy_write(phydev, 0x15, 0x1070);
 344         if (err < 0)
 345                 return err;
 346
 347         /* Change address */
 348         err = phy_write(phydev, 0x16, 0x0003);
 349         if (err < 0)
 350                 return err;
 351
 352         /* Adjust LED Control */
 353         err = phy_write(phydev, 0x10, 0x021e);
 354         if (err < 0)
 355                 return err;
 356
 357         /* Reset address */
 358         err = phy_write(phydev, 0x16, 0x0);
 359         if (err < 0)
 360                 return err;
 361
 362         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 363         if (err < 0)
 364                 return err;
 365
 366         return 0;
 367 }
 368
 369 static int m88e1145_config_init(struct phy_device *phydev)
 370 {
 371         int err;
 372
 373         /* Take care of errata E0 & E1 */
 374         err = phy_write(phydev, 0x1d, 0x001b);
 375         if (err < 0)
 376                 return err;
 377
 378         err = phy_write(phydev, 0x1e, 0x418f);
 379         if (err < 0)
 380                 return err;
 381
 382         err = phy_write(phydev, 0x1d, 0x0016);
 383         if (err < 0)
 384                 return err;
 385
 386         err = phy_write(phydev, 0x1e, 0xa2da);
 387         if (err < 0)
 388                 return err;
 389
 390         if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
 391                 int temp = phy_read(phydev, MII_M1145_PHY_EXT_CR);
 392                 if (temp < 0)
 393                         return temp;
 394
 395                 temp |= (MII_M1145_RGMII_RX_DELAY | MII_M1145_RGMII_TX_DELAY);
 396
 397                 err = phy_write(phydev, MII_M1145_PHY_EXT_CR, temp);
 398                 if (err < 0)
 399                         return err;
 400
 401                 if (phydev->dev_flags & M1145_DEV_FLAGS_RESISTANCE) {
 402                         err = phy_write(phydev, 0x1d, 0x0012);
 403                         if (err < 0)
 404                                 return err;
 405
 406                         temp = phy_read(phydev, 0x1e);
 407                         if (temp < 0)
 408                                 return temp;
 409
 410                         temp &= 0xf03f;
 411                         temp |= 2 << 9; /* 36 ohm */
 412                         temp |= 2 << 6; /* 39 ohm */
 413
 414                         err = phy_write(phydev, 0x1e, temp);
 415                         if (err < 0)
 416                                 return err;
 417
 418                         err = phy_write(phydev, 0x1d, 0x3);
 419                         if (err < 0)
 420                                 return err;
 421
 422                         err = phy_write(phydev, 0x1e, 0x8000);
 423                         if (err < 0)
 424                                 return err;
 425                 }
 426         }
 427
 428         return 0;
 429 }
 430
 431 /* marvell_read_status
 432  *
 433  * Generic status code does not detect Fiber correctly!
 434  * Description:
 435  *   Check the link, then figure out the current state
 436  *   by comparing what we advertise with what the link partner
 437  *   advertises.  Start by checking the gigabit possibilities,
 438  *   then move on to 10/100.
 439  */
 440 static int marvell_read_status(struct phy_device *phydev)
 441 {
 442         int adv;
 443         int err;
 444         int lpa;
 445         int status = 0;
 446
 447         /* Update the link, but return if there
 448          * was an error */
 449         err = genphy_update_link(phydev);
 450         if (err)
 451                 return err;
 452
 453         if (AUTONEG_ENABLE == phydev->autoneg) {
 454                 status = phy_read(phydev, MII_M1011_PHY_STATUS);
 455                 if (status < 0)
 456                         return status;
 457
 458                 lpa = phy_read(phydev, MII_LPA);
 459                 if (lpa < 0)
 460                         return lpa;
 461
 462                 adv = phy_read(phydev, MII_ADVERTISE);
 463                 if (adv < 0)
 464                         return adv;
 465
 466                 lpa &= adv;
 467
 468                 if (status & MII_M1011_PHY_STATUS_FULLDUPLEX)
 469                         phydev->duplex = DUPLEX_FULL;
 470                 else
 471                         phydev->duplex = DUPLEX_HALF;
 472
 473                 status = status & MII_M1011_PHY_STATUS_SPD_MASK;
 474                 phydev->pause = phydev->asym_pause = 0;
 475
 476                 switch (status) {
 477                 case MII_M1011_PHY_STATUS_1000:
 478                         phydev->speed = SPEED_1000;
 479                         break;
 480
 481                 case MII_M1011_PHY_STATUS_100:
 482                         phydev->speed = SPEED_100;
 483                         break;
 484
 485                 default:
 486                         phydev->speed = SPEED_10;
 487                         break;
 488                 }
 489
 490                 if (phydev->duplex == DUPLEX_FULL) {
 491                         phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
 492                         phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
 493                 }
 494         } else {
 495                 int bmcr = phy_read(phydev, MII_BMCR);
 496
 497                 if (bmcr < 0)
 498                         return bmcr;
 499
 500                 if (bmcr & BMCR_FULLDPLX)
 501                         phydev->duplex = DUPLEX_FULL;
 502                 else
 503                         phydev->duplex = DUPLEX_HALF;
 504
 505                 if (bmcr & BMCR_SPEED1000)
 506                         phydev->speed = SPEED_1000;
 507                 else if (bmcr & BMCR_SPEED100)
 508                         phydev->speed = SPEED_100;
 509                 else
 510                         phydev->speed = SPEED_10;
 511
 512                 phydev->pause = phydev->asym_pause = 0;
 513         }
 514
 515         return 0;
 516 }
 517
 518 static int m88e1121_did_interrupt(struct phy_device *phydev)
 519 {
 520         int imask;
 521
 522         imask = phy_read(phydev, MII_M1011_IEVENT);
 523
 524         if (imask & MII_M1011_IMASK_INIT)
 525                 return 1;
 526
 527         return 0;
 528 }
 529
 530 static struct phy_driver marvell_drivers[] = {
 531         {
 532                 .phy_id = 0x01410c60,
 533                 .phy_id_mask = 0xfffffff0,
 534                 .name = "Marvell 88E1101",
 535                 .features = PHY_GBIT_FEATURES,
 536                 .flags = PHY_HAS_INTERRUPT,
 537                 .config_aneg = &marvell_config_aneg,
 538                 .read_status = &genphy_read_status,
 539                 .ack_interrupt = &marvell_ack_interrupt,
 540                 .config_intr = &marvell_config_intr,
 541                 .driver = { .owner = THIS_MODULE },
 542         },
 543         {
 544                 .phy_id = 0x01410c90,
 545                 .phy_id_mask = 0xfffffff0,
 546                 .name = "Marvell 88E1112",
 547                 .features = PHY_GBIT_FEATURES,
 548                 .flags = PHY_HAS_INTERRUPT,
 549                 .config_init = &m88e1111_config_init,
 550                 .config_aneg = &marvell_config_aneg,
 551                 .read_status = &genphy_read_status,
 552                 .ack_interrupt = &marvell_ack_interrupt,
 553                 .config_intr = &marvell_config_intr,
 554                 .driver = { .owner = THIS_MODULE },
 555         },
 556         {
 557                 .phy_id = 0x01410cc0,
 558                 .phy_id_mask = 0xfffffff0,
 559                 .name = "Marvell 88E1111",
 560                 .features = PHY_GBIT_FEATURES,
 561                 .flags = PHY_HAS_INTERRUPT,
 562                 .config_init = &m88e1111_config_init,
 563                 .config_aneg = &marvell_config_aneg,
 564                 .read_status = &marvell_read_status,
 565                 .ack_interrupt = &marvell_ack_interrupt,
 566                 .config_intr = &marvell_config_intr,
 567                 .driver = { .owner = THIS_MODULE },
 568         },
 569         {
 570                 .phy_id = 0x01410e10,
 571                 .phy_id_mask = 0xfffffff0,
 572                 .name = "Marvell 88E1118",
 573                 .features = PHY_GBIT_FEATURES,
 574                 .flags = PHY_HAS_INTERRUPT,
 575                 .config_init = &m88e1118_config_init,
 576                 .config_aneg = &m88e1118_config_aneg,
 577                 .read_status = &genphy_read_status,
 578                 .ack_interrupt = &marvell_ack_interrupt,
 579                 .config_intr = &marvell_config_intr,
 580                 .driver = {.owner = THIS_MODULE,},
 581         },
 582         {
 583                 .phy_id = 0x01410cb0,
 584                 .phy_id_mask = 0xfffffff0,
 585                 .name = "Marvell 88E1121R",
 586                 .features = PHY_GBIT_FEATURES,
 587                 .flags = PHY_HAS_INTERRUPT,
 588                 .config_aneg = &m88e1121_config_aneg,
 589                 .read_status = &marvell_read_status,
 590                 .ack_interrupt = &marvell_ack_interrupt,
 591                 .config_intr = &marvell_config_intr,
 592                 .did_interrupt = &m88e1121_did_interrupt,
 593                 .driver = { .owner = THIS_MODULE },
 594         },
 595         {
 596                 .phy_id = 0x01410cd0,
 597                 .phy_id_mask = 0xfffffff0,
 598                 .name = "Marvell 88E1145",
 599                 .features = PHY_GBIT_FEATURES,
 600                 .flags = PHY_HAS_INTERRUPT,
 601                 .config_init = &m88e1145_config_init,
 602                 .config_aneg = &marvell_config_aneg,
 603                 .read_status = &genphy_read_status,
 604                 .ack_interrupt = &marvell_ack_interrupt,
 605                 .config_intr = &marvell_config_intr,
 606                 .driver = { .owner = THIS_MODULE },
 607         },
 608         {
 609                 .phy_id = 0x01410e30,
 610                 .phy_id_mask = 0xfffffff0,
 611                 .name = "Marvell 88E1240",
 612                 .features = PHY_GBIT_FEATURES,
 613                 .flags = PHY_HAS_INTERRUPT,
 614                 .config_init = &m88e1111_config_init,
 615                 .config_aneg = &marvell_config_aneg,
 616                 .read_status = &genphy_read_status,
 617                 .ack_interrupt = &marvell_ack_interrupt,
 618                 .config_intr = &marvell_config_intr,
 619                 .driver = { .owner = THIS_MODULE },
 620         },
 621 };
 622
 623 static int __init marvell_init(void)
 624 {
 625         int ret;
 626         int i;
 627
 628         for (i = 0; i < ARRAY_SIZE(marvell_drivers); i++) {
 629                 ret = phy_driver_register(&marvell_drivers[i]);
 630
 631                 if (ret) {
 632                         while (i-- > 0)
 633                                 phy_driver_unregister(&marvell_drivers[i]);
 634                         return ret;
 635                 }
 636         }
 637
 638         return 0;
 639 }
 640
 641 static void __exit marvell_exit(void)
 642 {
 643         int i;
 644
 645         for (i = 0; i < ARRAY_SIZE(marvell_drivers); i++)
 646                 phy_driver_unregister(&marvell_drivers[i]);
 647 }
 648
 649 module_init(marvell_init);
 650 module_exit(marvell_exit);