kernel/2.6.29.6-aldebaran-rt/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_M1011_PHY_STATUS            0x11
  73 #define MII_M1011_PHY_STATUS_1000       0x8000
  74 #define MII_M1011_PHY_STATUS_100        0x4000
  75 #define MII_M1011_PHY_STATUS_SPD_MASK   0xc000
  76 #define MII_M1011_PHY_STATUS_FULLDUPLEX 0x2000
  77 #define MII_M1011_PHY_STATUS_RESOLVED   0x0800
  78 #define MII_M1011_PHY_STATUS_LINK       0x0400
  79
  80
  81 MODULE_DESCRIPTION("Marvell PHY driver");
  82 MODULE_AUTHOR("Andy Fleming");
  83 MODULE_LICENSE("GPL");
  84
  85 static int marvell_ack_interrupt(struct phy_device *phydev)
  86 {
  87         int err;
  88
  89         /* Clear the interrupts by reading the reg */
  90         err = phy_read(phydev, MII_M1011_IEVENT);
  91
  92         if (err < 0)
  93                 return err;
  94
  95         return 0;
  96 }
  97
  98 static int marvell_config_intr(struct phy_device *phydev)
  99 {
 100         int err;
 101
 102         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
 103                 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_INIT);
 104         else
 105                 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_CLEAR);
 106
 107         return err;
 108 }
 109
 110 static int marvell_config_aneg(struct phy_device *phydev)
 111 {
 112         int err;
 113
 114         /* The Marvell PHY has an errata which requires
 115          * that certain registers get written in order
 116          * to restart autonegotiation */
 117         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 118
 119         if (err < 0)
 120                 return err;
 121
 122         err = phy_write(phydev, 0x1d, 0x1f);
 123         if (err < 0)
 124                 return err;
 125
 126         err = phy_write(phydev, 0x1e, 0x200c);
 127         if (err < 0)
 128                 return err;
 129
 130         err = phy_write(phydev, 0x1d, 0x5);
 131         if (err < 0)
 132                 return err;
 133
 134         err = phy_write(phydev, 0x1e, 0);
 135         if (err < 0)
 136                 return err;
 137
 138         err = phy_write(phydev, 0x1e, 0x100);
 139         if (err < 0)
 140                 return err;
 141
 142         err = phy_write(phydev, MII_M1011_PHY_SCR,
 143                         MII_M1011_PHY_SCR_AUTO_CROSS);
 144         if (err < 0)
 145                 return err;
 146
 147         err = phy_write(phydev, MII_M1111_PHY_LED_CONTROL,
 148                         MII_M1111_PHY_LED_DIRECT);
 149         if (err < 0)
 150                 return err;
 151
 152         err = genphy_config_aneg(phydev);
 153
 154         return err;
 155 }
 156
 157 static int m88e1111_config_init(struct phy_device *phydev)
 158 {
 159         int err;
 160         int temp;
 161
 162         /* Enable Fiber/Copper auto selection */
 163         temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
 164         temp &= ~MII_M1111_HWCFG_FIBER_COPPER_AUTO;
 165         phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
 166
 167         temp = phy_read(phydev, MII_BMCR);
 168         temp |= BMCR_RESET;
 169         phy_write(phydev, MII_BMCR, temp);
 170
 171         if ((phydev->interface == PHY_INTERFACE_MODE_RGMII) ||
 172             (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) ||
 173             (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) ||
 174             (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)) {
 175
 176                 temp = phy_read(phydev, MII_M1111_PHY_EXT_CR);
 177                 if (temp < 0)
 178                         return temp;
 179
 180                 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
 181                         temp |= (MII_M1111_RX_DELAY | MII_M1111_TX_DELAY);
 182                 } else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
 183                         temp &= ~MII_M1111_TX_DELAY;
 184                         temp |= MII_M1111_RX_DELAY;
 185                 } else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
 186                         temp &= ~MII_M1111_RX_DELAY;
 187                         temp |= MII_M1111_TX_DELAY;
 188                 }
 189
 190                 err = phy_write(phydev, MII_M1111_PHY_EXT_CR, temp);
 191                 if (err < 0)
 192                         return err;
 193
 194                 temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
 195                 if (temp < 0)
 196                         return temp;
 197
 198                 temp &= ~(MII_M1111_HWCFG_MODE_MASK);
 199
 200                 if (temp & MII_M1111_HWCFG_FIBER_COPPER_RES)
 201                         temp |= MII_M1111_HWCFG_MODE_FIBER_RGMII;
 202                 else
 203                         temp |= MII_M1111_HWCFG_MODE_COPPER_RGMII;
 204
 205                 err = phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
 206                 if (err < 0)
 207                         return err;
 208         }
 209
 210         if (phydev->interface == PHY_INTERFACE_MODE_SGMII) {
 211                 temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
 212                 if (temp < 0)
 213                         return temp;
 214
 215                 temp &= ~(MII_M1111_HWCFG_MODE_MASK);
 216                 temp |= MII_M1111_HWCFG_MODE_SGMII_NO_CLK;
 217
 218                 err = phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
 219                 if (err < 0)
 220                         return err;
 221         }
 222
 223         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 224         if (err < 0)
 225                 return err;
 226
 227         return 0;
 228 }
 229
 230 static int m88e1118_config_aneg(struct phy_device *phydev)
 231 {
 232         int err;
 233
 234         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 235         if (err < 0)
 236                 return err;
 237
 238         err = phy_write(phydev, MII_M1011_PHY_SCR,
 239                         MII_M1011_PHY_SCR_AUTO_CROSS);
 240         if (err < 0)
 241                 return err;
 242
 243         err = genphy_config_aneg(phydev);
 244         return 0;
 245 }
 246
 247 static int m88e1118_config_init(struct phy_device *phydev)
 248 {
 249         int err;
 250
 251         /* Change address */
 252         err = phy_write(phydev, 0x16, 0x0002);
 253         if (err < 0)
 254                 return err;
 255
 256         /* Enable 1000 Mbit */
 257         err = phy_write(phydev, 0x15, 0x1070);
 258         if (err < 0)
 259                 return err;
 260
 261         /* Change address */
 262         err = phy_write(phydev, 0x16, 0x0003);
 263         if (err < 0)
 264                 return err;
 265
 266         /* Adjust LED Control */
 267         err = phy_write(phydev, 0x10, 0x021e);
 268         if (err < 0)
 269                 return err;
 270
 271         /* Reset address */
 272         err = phy_write(phydev, 0x16, 0x0);
 273         if (err < 0)
 274                 return err;
 275
 276         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
 277         if (err < 0)
 278                 return err;
 279
 280         return 0;
 281 }
 282
 283 static int m88e1145_config_init(struct phy_device *phydev)
 284 {
 285         int err;
 286
 287         /* Take care of errata E0 & E1 */
 288         err = phy_write(phydev, 0x1d, 0x001b);
 289         if (err < 0)
 290                 return err;
 291
 292         err = phy_write(phydev, 0x1e, 0x418f);
 293         if (err < 0)
 294                 return err;
 295
 296         err = phy_write(phydev, 0x1d, 0x0016);
 297         if (err < 0)
 298                 return err;
 299
 300         err = phy_write(phydev, 0x1e, 0xa2da);
 301         if (err < 0)
 302                 return err;
 303
 304         if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
 305                 int temp = phy_read(phydev, MII_M1145_PHY_EXT_CR);
 306                 if (temp < 0)
 307                         return temp;
 308
 309                 temp |= (MII_M1145_RGMII_RX_DELAY | MII_M1145_RGMII_TX_DELAY);
 310
 311                 err = phy_write(phydev, MII_M1145_PHY_EXT_CR, temp);
 312                 if (err < 0)
 313                         return err;
 314
 315                 if (phydev->dev_flags & M1145_DEV_FLAGS_RESISTANCE) {
 316                         err = phy_write(phydev, 0x1d, 0x0012);
 317                         if (err < 0)
 318                                 return err;
 319
 320                         temp = phy_read(phydev, 0x1e);
 321                         if (temp < 0)
 322                                 return temp;
 323
 324                         temp &= 0xf03f;
 325                         temp |= 2 << 9; /* 36 ohm */
 326                         temp |= 2 << 6; /* 39 ohm */
 327
 328                         err = phy_write(phydev, 0x1e, temp);
 329                         if (err < 0)
 330                                 return err;
 331
 332                         err = phy_write(phydev, 0x1d, 0x3);
 333                         if (err < 0)
 334                                 return err;
 335
 336                         err = phy_write(phydev, 0x1e, 0x8000);
 337                         if (err < 0)
 338                                 return err;
 339                 }
 340         }
 341
 342         return 0;
 343 }
 344
 345 /* marvell_read_status
 346  *
 347  * Generic status code does not detect Fiber correctly!
 348  * Description:
 349  *   Check the link, then figure out the current state
 350  *   by comparing what we advertise with what the link partner
 351  *   advertises.  Start by checking the gigabit possibilities,
 352  *   then move on to 10/100.
 353  */
 354 static int marvell_read_status(struct phy_device *phydev)
 355 {
 356         int adv;
 357         int err;
 358         int lpa;
 359         int status = 0;
 360
 361         /* Update the link, but return if there
 362          * was an error */
 363         err = genphy_update_link(phydev);
 364         if (err)
 365                 return err;
 366
 367         if (AUTONEG_ENABLE == phydev->autoneg) {
 368                 status = phy_read(phydev, MII_M1011_PHY_STATUS);
 369                 if (status < 0)
 370                         return status;
 371
 372                 lpa = phy_read(phydev, MII_LPA);
 373                 if (lpa < 0)
 374                         return lpa;
 375
 376                 adv = phy_read(phydev, MII_ADVERTISE);
 377                 if (adv < 0)
 378                         return adv;
 379
 380                 lpa &= adv;
 381
 382                 if (status & MII_M1011_PHY_STATUS_FULLDUPLEX)
 383                         phydev->duplex = DUPLEX_FULL;
 384                 else
 385                         phydev->duplex = DUPLEX_HALF;
 386
 387                 status = status & MII_M1011_PHY_STATUS_SPD_MASK;
 388                 phydev->pause = phydev->asym_pause = 0;
 389
 390                 switch (status) {
 391                 case MII_M1011_PHY_STATUS_1000:
 392                         phydev->speed = SPEED_1000;
 393                         break;
 394
 395                 case MII_M1011_PHY_STATUS_100:
 396                         phydev->speed = SPEED_100;
 397                         break;
 398
 399                 default:
 400                         phydev->speed = SPEED_10;
 401                         break;
 402                 }
 403
 404                 if (phydev->duplex == DUPLEX_FULL) {
 405                         phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
 406                         phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
 407                 }
 408         } else {
 409                 int bmcr = phy_read(phydev, MII_BMCR);
 410
 411                 if (bmcr < 0)
 412                         return bmcr;
 413
 414                 if (bmcr & BMCR_FULLDPLX)
 415                         phydev->duplex = DUPLEX_FULL;
 416                 else
 417                         phydev->duplex = DUPLEX_HALF;
 418
 419                 if (bmcr & BMCR_SPEED1000)
 420                         phydev->speed = SPEED_1000;
 421                 else if (bmcr & BMCR_SPEED100)
 422                         phydev->speed = SPEED_100;
 423                 else
 424                         phydev->speed = SPEED_10;
 425
 426                 phydev->pause = phydev->asym_pause = 0;
 427         }
 428
 429         return 0;
 430 }
 431
 432 static struct phy_driver marvell_drivers[] = {
 433         {
 434                 .phy_id = 0x01410c60,
 435                 .phy_id_mask = 0xfffffff0,
 436                 .name = "Marvell 88E1101",
 437                 .features = PHY_GBIT_FEATURES,
 438                 .flags = PHY_HAS_INTERRUPT,
 439                 .config_aneg = &marvell_config_aneg,
 440                 .read_status = &genphy_read_status,
 441                 .ack_interrupt = &marvell_ack_interrupt,
 442                 .config_intr = &marvell_config_intr,
 443                 .driver = { .owner = THIS_MODULE },
 444         },
 445         {
 446                 .phy_id = 0x01410c90,
 447                 .phy_id_mask = 0xfffffff0,
 448                 .name = "Marvell 88E1112",
 449                 .features = PHY_GBIT_FEATURES,
 450                 .flags = PHY_HAS_INTERRUPT,
 451                 .config_init = &m88e1111_config_init,
 452                 .config_aneg = &marvell_config_aneg,
 453                 .read_status = &genphy_read_status,
 454                 .ack_interrupt = &marvell_ack_interrupt,
 455                 .config_intr = &marvell_config_intr,
 456                 .driver = { .owner = THIS_MODULE },
 457         },
 458         {
 459                 .phy_id = 0x01410cc0,
 460                 .phy_id_mask = 0xfffffff0,
 461                 .name = "Marvell 88E1111",
 462                 .features = PHY_GBIT_FEATURES,
 463                 .flags = PHY_HAS_INTERRUPT,
 464                 .config_init = &m88e1111_config_init,
 465                 .config_aneg = &marvell_config_aneg,
 466                 .read_status = &marvell_read_status,
 467                 .ack_interrupt = &marvell_ack_interrupt,
 468                 .config_intr = &marvell_config_intr,
 469                 .driver = { .owner = THIS_MODULE },
 470         },
 471         {
 472                 .phy_id = 0x01410e10,
 473                 .phy_id_mask = 0xfffffff0,
 474                 .name = "Marvell 88E1118",
 475                 .features = PHY_GBIT_FEATURES,
 476                 .flags = PHY_HAS_INTERRUPT,
 477                 .config_init = &m88e1118_config_init,
 478                 .config_aneg = &m88e1118_config_aneg,
 479                 .read_status = &genphy_read_status,
 480                 .ack_interrupt = &marvell_ack_interrupt,
 481                 .config_intr = &marvell_config_intr,
 482                 .driver = {.owner = THIS_MODULE,},
 483         },
 484         {
 485                 .phy_id = 0x01410cd0,
 486                 .phy_id_mask = 0xfffffff0,
 487                 .name = "Marvell 88E1145",
 488                 .features = PHY_GBIT_FEATURES,
 489                 .flags = PHY_HAS_INTERRUPT,
 490                 .config_init = &m88e1145_config_init,
 491                 .config_aneg = &marvell_config_aneg,
 492                 .read_status = &genphy_read_status,
 493                 .ack_interrupt = &marvell_ack_interrupt,
 494                 .config_intr = &marvell_config_intr,
 495                 .driver = { .owner = THIS_MODULE },
 496         },
 497         {
 498                 .phy_id = 0x01410e30,
 499                 .phy_id_mask = 0xfffffff0,
 500                 .name = "Marvell 88E1240",
 501                 .features = PHY_GBIT_FEATURES,
 502                 .flags = PHY_HAS_INTERRUPT,
 503                 .config_init = &m88e1111_config_init,
 504                 .config_aneg = &marvell_config_aneg,
 505                 .read_status = &genphy_read_status,
 506                 .ack_interrupt = &marvell_ack_interrupt,
 507                 .config_intr = &marvell_config_intr,
 508                 .driver = { .owner = THIS_MODULE },
 509         },
 510 };
 511
 512 static int __init marvell_init(void)
 513 {
 514         int ret;
 515         int i;
 516
 517         for (i = 0; i < ARRAY_SIZE(marvell_drivers); i++) {
 518                 ret = phy_driver_register(&marvell_drivers[i]);
 519
 520                 if (ret) {
 521                         while (i-- > 0)
 522                                 phy_driver_unregister(&marvell_drivers[i]);
 523                         return ret;
 524                 }
 525         }
 526
 527         return 0;
 528 }
 529
 530 static void __exit marvell_exit(void)
 531 {
 532         int i;
 533
 534         for (i = 0; i < ARRAY_SIZE(marvell_drivers); i++)
 535                 phy_driver_unregister(&marvell_drivers[i]);
 536 }
 537
 538 module_init(marvell_init);
 539 module_exit(marvell_exit);