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/slab.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/init.h>
  23 #include <linux/delay.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/skbuff.h>
  27 #include <linux/spinlock.h>
  28 #include <linux/mm.h>
  29 #include <linux/module.h>
  30 #include <linux/mii.h>
  31 #include <linux/ethtool.h>
  32 #include <linux/phy.h>
  33
  34 #include <asm/io.h>
  35 #include <asm/irq.h>
  36 #include <asm/uaccess.h>
  37
  38 #define MII_M1011_IEVENT                0x13
  39 #define MII_M1011_IEVENT_CLEAR          0x0000
  40
  41 #define MII_M1011_IMASK                 0x12
  42 #define MII_M1011_IMASK_INIT            0x6400
  43 #define MII_M1011_IMASK_CLEAR           0x0000
  44
  45 #define MII_M1011_PHY_SCR               0x10
  46 #define MII_M1011_PHY_SCR_AUTO_CROSS    0x0060
  47
  48 #define MII_M1145_PHY_EXT_CR            0x14
  49 #define MII_M1145_RGMII_RX_DELAY        0x0080
  50 #define MII_M1145_RGMII_TX_DELAY        0x0002
  51
  52 #define M1145_DEV_FLAGS_RESISTANCE      0x00000001
  53
  54 #define MII_M1111_PHY_LED_CONTROL       0x18
  55 #define MII_M1111_PHY_LED_DIRECT        0x4100
  56 #define MII_M1111_PHY_LED_COMBINE       0x411c
  57 #define MII_M1111_PHY_EXT_CR            0x14
  58 #define MII_M1111_RX_DELAY              0x80
  59 #define MII_M1111_TX_DELAY              0x2
  60 #define MII_M1111_PHY_EXT_SR            0x1b
  61
  62 #define MII_M1111_HWCFG_MODE_MASK               0xf
  63 #define MII_M1111_HWCFG_MODE_COPPER_RGMII       0xb
  64 #define MII_M1111_HWCFG_MODE_FIBER_RGMII        0x3
  65 #define MII_M1111_HWCFG_MODE_SGMII_NO_CLK       0x4
  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         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 273         if (err < 0)
 274                 return err;
 275
 276         return 0;
 277 }
 278
 279 static int m88e1118_config_aneg(struct phy_device *phydev)
 280 {
 281         int err;
 282
 283         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 284         if (err < 0)
 285                 return err;
 286
 287         err = phy_write(phydev, MII_M1011_PHY_SCR,
 288                         MII_M1011_PHY_SCR_AUTO_CROSS);
 289         if (err < 0)
 290                 return err;
 291
 292         err = genphy_config_aneg(phydev);
 293         return 0;
 294 }
 295
 296 static int m88e1118_config_init(struct phy_device *phydev)
 297 {
 298         int err;
 299
 300         /* Change address */
 301         err = phy_write(phydev, 0x16, 0x0002);
 302         if (err < 0)
 303                 return err;
 304
 305         /* Enable 1000 Mbit */
 306         err = phy_write(phydev, 0x15, 0x1070);
 307         if (err < 0)
 308                 return err;
 309
 310         /* Change address */
 311         err = phy_write(phydev, 0x16, 0x0003);
 312         if (err < 0)
 313                 return err;
 314
 315         /* Adjust LED Control */
 316         err = phy_write(phydev, 0x10, 0x021e);
 317         if (err < 0)
 318                 return err;
 319
 320         /* Reset address */
 321         err = phy_write(phydev, 0x16, 0x0);
 322         if (err < 0)
 323                 return err;
 324
 325         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 326         if (err < 0)
 327                 return err;
 328
 329         return 0;
 330 }
 331
 332 static int m88e1145_config_init(struct phy_device *phydev)
 333 {
 334         int err;
 335
 336         /* Take care of errata E0 & E1 */
 337         err = phy_write(phydev, 0x1d, 0x001b);
 338         if (err < 0)
 339                 return err;
 340
 341         err = phy_write(phydev, 0x1e, 0x418f);
 342         if (err < 0)
 343                 return err;
 344
 345         err = phy_write(phydev, 0x1d, 0x0016);
 346         if (err < 0)
 347                 return err;
 348
 349         err = phy_write(phydev, 0x1e, 0xa2da);
 350         if (err < 0)
 351                 return err;
 352
 353         if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
 354                 int temp = phy_read(phydev, MII_M1145_PHY_EXT_CR);
 355                 if (temp < 0)
 356                         return temp;
 357
 358                 temp |= (MII_M1145_RGMII_RX_DELAY | MII_M1145_RGMII_TX_DELAY);
 359
 360                 err = phy_write(phydev, MII_M1145_PHY_EXT_CR, temp);
 361                 if (err < 0)
 362                         return err;
 363
 364                 if (phydev->dev_flags & M1145_DEV_FLAGS_RESISTANCE) {
 365                         err = phy_write(phydev, 0x1d, 0x0012);
 366                         if (err < 0)
 367                                 return err;
 368
 369                         temp = phy_read(phydev, 0x1e);
 370                         if (temp < 0)
 371                                 return temp;
 372
 373                         temp &= 0xf03f;
 374                         temp |= 2 << 9; /* 36 ohm */
 375                         temp |= 2 << 6; /* 39 ohm */
 376
 377                         err = phy_write(phydev, 0x1e, temp);
 378                         if (err < 0)
 379                                 return err;
 380
 381                         err = phy_write(phydev, 0x1d, 0x3);
 382                         if (err < 0)
 383                                 return err;
 384
 385                         err = phy_write(phydev, 0x1e, 0x8000);
 386                         if (err < 0)
 387                                 return err;
 388                 }
 389         }
 390
 391         return 0;
 392 }
 393
 394 /* marvell_read_status
 395  *
 396  * Generic status code does not detect Fiber correctly!
 397  * Description:
 398  *   Check the link, then figure out the current state
 399  *   by comparing what we advertise with what the link partner
 400  *   advertises.  Start by checking the gigabit possibilities,
 401  *   then move on to 10/100.
 402  */
 403 static int marvell_read_status(struct phy_device *phydev)
 404 {
 405         int adv;
 406         int err;
 407         int lpa;
 408         int status = 0;
 409
 410         /* Update the link, but return if there
 411          * was an error */
 412         err = genphy_update_link(phydev);
 413         if (err)
 414                 return err;
 415
 416         if (AUTONEG_ENABLE == phydev->autoneg) {
 417                 status = phy_read(phydev, MII_M1011_PHY_STATUS);
 418                 if (status < 0)
 419                         return status;
 420
 421                 lpa = phy_read(phydev, MII_LPA);
 422                 if (lpa < 0)
 423                         return lpa;
 424
 425                 adv = phy_read(phydev, MII_ADVERTISE);
 426                 if (adv < 0)
 427                         return adv;
 428
 429                 lpa &= adv;
 430
 431                 if (status & MII_M1011_PHY_STATUS_FULLDUPLEX)
 432                         phydev->duplex = DUPLEX_FULL;
 433                 else
 434                         phydev->duplex = DUPLEX_HALF;
 435
 436                 status = status & MII_M1011_PHY_STATUS_SPD_MASK;
 437                 phydev->pause = phydev->asym_pause = 0;
 438
 439                 switch (status) {
 440                 case MII_M1011_PHY_STATUS_1000:
 441                         phydev->speed = SPEED_1000;
 442                         break;
 443
 444                 case MII_M1011_PHY_STATUS_100:
 445                         phydev->speed = SPEED_100;
 446                         break;
 447
 448                 default:
 449                         phydev->speed = SPEED_10;
 450                         break;
 451                 }
 452
 453                 if (phydev->duplex == DUPLEX_FULL) {
 454                         phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
 455                         phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
 456                 }
 457         } else {
 458                 int bmcr = phy_read(phydev, MII_BMCR);
 459
 460                 if (bmcr < 0)
 461                         return bmcr;
 462
 463                 if (bmcr & BMCR_FULLDPLX)
 464                         phydev->duplex = DUPLEX_FULL;
 465                 else
 466                         phydev->duplex = DUPLEX_HALF;
 467
 468                 if (bmcr & BMCR_SPEED1000)
 469                         phydev->speed = SPEED_1000;
 470                 else if (bmcr & BMCR_SPEED100)
 471                         phydev->speed = SPEED_100;
 472                 else
 473                         phydev->speed = SPEED_10;
 474
 475                 phydev->pause = phydev->asym_pause = 0;
 476         }
 477
 478         return 0;
 479 }
 480
 481 static int m88e1121_did_interrupt(struct phy_device *phydev)
 482 {
 483         int imask;
 484
 485         imask = phy_read(phydev, MII_M1011_IEVENT);
 486
 487         if (imask & MII_M1011_IMASK_INIT)
 488                 return 1;
 489
 490         return 0;
 491 }
 492
 493 static struct phy_driver marvell_drivers[] = {
 494         {
 495                 .phy_id = 0x01410c60,
 496                 .phy_id_mask = 0xfffffff0,
 497                 .name = "Marvell 88E1101",
 498                 .features = PHY_GBIT_FEATURES,
 499                 .flags = PHY_HAS_INTERRUPT,
 500                 .config_aneg = &marvell_config_aneg,
 501                 .read_status = &genphy_read_status,
 502                 .ack_interrupt = &marvell_ack_interrupt,
 503                 .config_intr = &marvell_config_intr,
 504                 .driver = { .owner = THIS_MODULE },
 505         },
 506         {
 507                 .phy_id = 0x01410c90,
 508                 .phy_id_mask = 0xfffffff0,
 509                 .name = "Marvell 88E1112",
 510                 .features = PHY_GBIT_FEATURES,
 511                 .flags = PHY_HAS_INTERRUPT,
 512                 .config_init = &m88e1111_config_init,
 513                 .config_aneg = &marvell_config_aneg,
 514                 .read_status = &genphy_read_status,
 515                 .ack_interrupt = &marvell_ack_interrupt,
 516                 .config_intr = &marvell_config_intr,
 517                 .driver = { .owner = THIS_MODULE },
 518         },
 519         {
 520                 .phy_id = 0x01410cc0,
 521                 .phy_id_mask = 0xfffffff0,
 522                 .name = "Marvell 88E1111",
 523                 .features = PHY_GBIT_FEATURES,
 524                 .flags = PHY_HAS_INTERRUPT,
 525                 .config_init = &m88e1111_config_init,
 526                 .config_aneg = &marvell_config_aneg,
 527                 .read_status = &marvell_read_status,
 528                 .ack_interrupt = &marvell_ack_interrupt,
 529                 .config_intr = &marvell_config_intr,
 530                 .driver = { .owner = THIS_MODULE },
 531         },
 532         {
 533                 .phy_id = 0x01410e10,
 534                 .phy_id_mask = 0xfffffff0,
 535                 .name = "Marvell 88E1118",
 536                 .features = PHY_GBIT_FEATURES,
 537                 .flags = PHY_HAS_INTERRUPT,
 538                 .config_init = &m88e1118_config_init,
 539                 .config_aneg = &m88e1118_config_aneg,
 540                 .read_status = &genphy_read_status,
 541                 .ack_interrupt = &marvell_ack_interrupt,
 542                 .config_intr = &marvell_config_intr,
 543                 .driver = {.owner = THIS_MODULE,},
 544         },
 545         {
 546                 .phy_id = 0x01410cb0,
 547                 .phy_id_mask = 0xfffffff0,
 548                 .name = "Marvell 88E1121R",
 549                 .features = PHY_GBIT_FEATURES,
 550                 .flags = PHY_HAS_INTERRUPT,
 551                 .config_aneg = &m88e1121_config_aneg,
 552                 .read_status = &marvell_read_status,
 553                 .ack_interrupt = &marvell_ack_interrupt,
 554                 .config_intr = &marvell_config_intr,
 555                 .did_interrupt = &m88e1121_did_interrupt,
 556                 .driver = { .owner = THIS_MODULE },
 557         },
 558         {
 559                 .phy_id = 0x01410cd0,
 560                 .phy_id_mask = 0xfffffff0,
 561                 .name = "Marvell 88E1145",
 562                 .features = PHY_GBIT_FEATURES,
 563                 .flags = PHY_HAS_INTERRUPT,
 564                 .config_init = &m88e1145_config_init,
 565                 .config_aneg = &marvell_config_aneg,
 566                 .read_status = &genphy_read_status,
 567                 .ack_interrupt = &marvell_ack_interrupt,
 568                 .config_intr = &marvell_config_intr,
 569                 .driver = { .owner = THIS_MODULE },
 570         },
 571         {
 572                 .phy_id = 0x01410e30,
 573                 .phy_id_mask = 0xfffffff0,
 574                 .name = "Marvell 88E1240",
 575                 .features = PHY_GBIT_FEATURES,
 576                 .flags = PHY_HAS_INTERRUPT,
 577                 .config_init = &m88e1111_config_init,
 578                 .config_aneg = &marvell_config_aneg,
 579                 .read_status = &genphy_read_status,
 580                 .ack_interrupt = &marvell_ack_interrupt,
 581                 .config_intr = &marvell_config_intr,
 582                 .driver = { .owner = THIS_MODULE },
 583         },
 584 };
 585
 586 static int __init marvell_init(void)
 587 {
 588         int ret;
 589         int i;
 590
 591         for (i = 0; i < ARRAY_SIZE(marvell_drivers); i++) {
 592                 ret = phy_driver_register(&marvell_drivers[i]);
 593
 594                 if (ret) {
 595                         while (i-- > 0)
 596                                 phy_driver_unregister(&marvell_drivers[i]);
 597                         return ret;
 598                 }
 599         }
 600
 601         return 0;
 602 }
 603
 604 static void __exit marvell_exit(void)
 605 {
 606         int i;
 607
 608         for (i = 0; i < ARRAY_SIZE(marvell_drivers); i++)
 609                 phy_driver_unregister(&marvell_drivers[i]);
 610 }
 611
 612 module_init(marvell_init);
 613 module_exit(marvell_exit);