drivers/net/phy/dp83869.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Driver for the Texas Instruments DP83869 PHY
   3  * Copyright (C) 2019 Texas Instruments Inc.
   4  */
   5
   6 #include <linux/ethtool.h>
   7 #include <linux/etherdevice.h>
   8 #include <linux/kernel.h>
   9 #include <linux/mii.h>
  10 #include <linux/module.h>
  11 #include <linux/of.h>
  12 #include <linux/phy.h>
  13 #include <linux/delay.h>
  14 #include <linux/bitfield.h>
  15
  16 #include <dt-bindings/net/ti-dp83869.h>
  17
  18 #define DP83869_PHY_ID          0x2000a0f1
  19 #define DP83561_PHY_ID          0x2000a1a4
  20 #define DP83869_DEVADDR         0x1f
  21
  22 #define MII_DP83869_PHYCTRL     0x10
  23 #define MII_DP83869_MICR        0x12
  24 #define MII_DP83869_ISR         0x13
  25 #define DP83869_CFG2            0x14
  26 #define DP83869_CTRL            0x1f
  27 #define DP83869_CFG4            0x1e
  28
  29 /* Extended Registers */
  30 #define DP83869_GEN_CFG3        0x0031
  31 #define DP83869_RGMIICTL        0x0032
  32 #define DP83869_STRAP_STS1      0x006e
  33 #define DP83869_RGMIIDCTL       0x0086
  34 #define DP83869_RXFCFG          0x0134
  35 #define DP83869_RXFPMD1         0x0136
  36 #define DP83869_RXFPMD2         0x0137
  37 #define DP83869_RXFPMD3         0x0138
  38 #define DP83869_RXFSOP1         0x0139
  39 #define DP83869_RXFSOP2         0x013A
  40 #define DP83869_RXFSOP3         0x013B
  41 #define DP83869_IO_MUX_CFG      0x0170
  42 #define DP83869_OP_MODE         0x01df
  43 #define DP83869_FX_CTRL         0x0c00
  44
  45 #define DP83869_SW_RESET        BIT(15)
  46 #define DP83869_SW_RESTART      BIT(14)
  47
  48 /* MICR Interrupt bits */
  49 #define MII_DP83869_MICR_AN_ERR_INT_EN          BIT(15)
  50 #define MII_DP83869_MICR_SPEED_CHNG_INT_EN      BIT(14)
  51 #define MII_DP83869_MICR_DUP_MODE_CHNG_INT_EN   BIT(13)
  52 #define MII_DP83869_MICR_PAGE_RXD_INT_EN        BIT(12)
  53 #define MII_DP83869_MICR_AUTONEG_COMP_INT_EN    BIT(11)
  54 #define MII_DP83869_MICR_LINK_STS_CHNG_INT_EN   BIT(10)
  55 #define MII_DP83869_MICR_FALSE_CARRIER_INT_EN   BIT(8)
  56 #define MII_DP83869_MICR_SLEEP_MODE_CHNG_INT_EN BIT(4)
  57 #define MII_DP83869_MICR_WOL_INT_EN             BIT(3)
  58 #define MII_DP83869_MICR_XGMII_ERR_INT_EN       BIT(2)
  59 #define MII_DP83869_MICR_POL_CHNG_INT_EN        BIT(1)
  60 #define MII_DP83869_MICR_JABBER_INT_EN          BIT(0)
  61
  62 #define MII_DP83869_BMCR_DEFAULT        (BMCR_ANENABLE | \
  63                                          BMCR_FULLDPLX | \
  64                                          BMCR_SPEED1000)
  65
  66 #define MII_DP83869_FIBER_ADVERTISE    (ADVERTISED_FIBRE | \
  67                                         ADVERTISED_Pause | \
  68                                         ADVERTISED_Asym_Pause)
  69
  70 /* This is the same bit mask as the BMCR so re-use the BMCR default */
  71 #define DP83869_FX_CTRL_DEFAULT MII_DP83869_BMCR_DEFAULT
  72
  73 /* CFG1 bits */
  74 #define DP83869_CFG1_DEFAULT    (ADVERTISE_1000HALF | \
  75                                  ADVERTISE_1000FULL | \
  76                                  CTL1000_AS_MASTER)
  77
  78 /* RGMIICTL bits */
  79 #define DP83869_RGMII_TX_CLK_DELAY_EN           BIT(1)
  80 #define DP83869_RGMII_RX_CLK_DELAY_EN           BIT(0)
  81
  82 /* RGMIIDCTL */
  83 #define DP83869_RGMII_CLK_DELAY_SHIFT           4
  84 #define DP83869_CLK_DELAY_DEF                   7
  85
  86 /* STRAP_STS1 bits */
  87 #define DP83869_STRAP_OP_MODE_MASK              GENMASK(2, 0)
  88 #define DP83869_STRAP_STS1_RESERVED             BIT(11)
  89 #define DP83869_STRAP_MIRROR_ENABLED           BIT(12)
  90
  91 /* PHYCTRL bits */
  92 #define DP83869_RX_FIFO_SHIFT   12
  93 #define DP83869_TX_FIFO_SHIFT   14
  94
  95 /* PHY_CTRL lower bytes 0x48 are declared as reserved */
  96 #define DP83869_PHY_CTRL_DEFAULT        0x48
  97 #define DP83869_PHYCR_FIFO_DEPTH_MASK   GENMASK(15, 12)
  98 #define DP83869_PHYCR_RESERVED_MASK     BIT(11)
  99
 100 /* IO_MUX_CFG bits */
 101 #define DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL    0x1f
 102
 103 #define DP83869_IO_MUX_CFG_IO_IMPEDANCE_MAX     0x0
 104 #define DP83869_IO_MUX_CFG_IO_IMPEDANCE_MIN     0x1f
 105 #define DP83869_IO_MUX_CFG_CLK_O_SEL_MASK       (0x1f << 8)
 106 #define DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT      8
 107
 108 /* CFG3 bits */
 109 #define DP83869_CFG3_PORT_MIRROR_EN              BIT(0)
 110
 111 /* CFG4 bits */
 112 #define DP83869_INT_OE  BIT(7)
 113
 114 /* OP MODE */
 115 #define DP83869_OP_MODE_MII                     BIT(5)
 116 #define DP83869_SGMII_RGMII_BRIDGE              BIT(6)
 117
 118 /* RXFCFG bits*/
 119 #define DP83869_WOL_MAGIC_EN            BIT(0)
 120 #define DP83869_WOL_PATTERN_EN          BIT(1)
 121 #define DP83869_WOL_BCAST_EN            BIT(2)
 122 #define DP83869_WOL_UCAST_EN            BIT(4)
 123 #define DP83869_WOL_SEC_EN              BIT(5)
 124 #define DP83869_WOL_ENH_MAC             BIT(7)
 125
 126 /* CFG2 bits */
 127 #define DP83869_DOWNSHIFT_EN            (BIT(8) | BIT(9))
 128 #define DP83869_DOWNSHIFT_ATTEMPT_MASK  (BIT(10) | BIT(11))
 129 #define DP83869_DOWNSHIFT_1_COUNT_VAL   0
 130 #define DP83869_DOWNSHIFT_2_COUNT_VAL   1
 131 #define DP83869_DOWNSHIFT_4_COUNT_VAL   2
 132 #define DP83869_DOWNSHIFT_8_COUNT_VAL   3
 133 #define DP83869_DOWNSHIFT_1_COUNT       1
 134 #define DP83869_DOWNSHIFT_2_COUNT       2
 135 #define DP83869_DOWNSHIFT_4_COUNT       4
 136 #define DP83869_DOWNSHIFT_8_COUNT       8
 137
 138 enum {
 139         DP83869_PORT_MIRRORING_KEEP,
 140         DP83869_PORT_MIRRORING_EN,
 141         DP83869_PORT_MIRRORING_DIS,
 142 };
 143
 144 struct dp83869_private {
 145         int tx_fifo_depth;
 146         int rx_fifo_depth;
 147         s32 rx_int_delay;
 148         s32 tx_int_delay;
 149         int io_impedance;
 150         int port_mirroring;
 151         bool rxctrl_strap_quirk;
 152         int clk_output_sel;
 153         int mode;
 154 };
 155
 156 static int dp83869_read_status(struct phy_device *phydev)
 157 {
 158         struct dp83869_private *dp83869 = phydev->priv;
 159         int ret;
 160
 161         ret = genphy_read_status(phydev);
 162         if (ret)
 163                 return ret;
 164
 165         if (linkmode_test_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->supported)) {
 166                 if (phydev->link) {
 167                         if (dp83869->mode == DP83869_RGMII_100_BASE)
 168                                 phydev->speed = SPEED_100;
 169                 } else {
 170                         phydev->speed = SPEED_UNKNOWN;
 171                         phydev->duplex = DUPLEX_UNKNOWN;
 172                 }
 173         }
 174
 175         return 0;
 176 }
 177
 178 static int dp83869_ack_interrupt(struct phy_device *phydev)
 179 {
 180         int err = phy_read(phydev, MII_DP83869_ISR);
 181
 182         if (err < 0)
 183                 return err;
 184
 185         return 0;
 186 }
 187
 188 static int dp83869_config_intr(struct phy_device *phydev)
 189 {
 190         int micr_status = 0, err;
 191
 192         if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
 193                 err = dp83869_ack_interrupt(phydev);
 194                 if (err)
 195                         return err;
 196
 197                 micr_status = phy_read(phydev, MII_DP83869_MICR);
 198                 if (micr_status < 0)
 199                         return micr_status;
 200
 201                 micr_status |=
 202                         (MII_DP83869_MICR_AN_ERR_INT_EN |
 203                         MII_DP83869_MICR_SPEED_CHNG_INT_EN |
 204                         MII_DP83869_MICR_AUTONEG_COMP_INT_EN |
 205                         MII_DP83869_MICR_LINK_STS_CHNG_INT_EN |
 206                         MII_DP83869_MICR_DUP_MODE_CHNG_INT_EN |
 207                         MII_DP83869_MICR_SLEEP_MODE_CHNG_INT_EN);
 208
 209                 err = phy_write(phydev, MII_DP83869_MICR, micr_status);
 210         } else {
 211                 err = phy_write(phydev, MII_DP83869_MICR, micr_status);
 212                 if (err)
 213                         return err;
 214
 215                 err = dp83869_ack_interrupt(phydev);
 216         }
 217
 218         return err;
 219 }
 220
 221 static irqreturn_t dp83869_handle_interrupt(struct phy_device *phydev)
 222 {
 223         int irq_status, irq_enabled;
 224
 225         irq_status = phy_read(phydev, MII_DP83869_ISR);
 226         if (irq_status < 0) {
 227                 phy_error(phydev);
 228                 return IRQ_NONE;
 229         }
 230
 231         irq_enabled = phy_read(phydev, MII_DP83869_MICR);
 232         if (irq_enabled < 0) {
 233                 phy_error(phydev);
 234                 return IRQ_NONE;
 235         }
 236
 237         if (!(irq_status & irq_enabled))
 238                 return IRQ_NONE;
 239
 240         phy_trigger_machine(phydev);
 241
 242         return IRQ_HANDLED;
 243 }
 244
 245 static int dp83869_set_wol(struct phy_device *phydev,
 246                            struct ethtool_wolinfo *wol)
 247 {
 248         struct net_device *ndev = phydev->attached_dev;
 249         int val_rxcfg, val_micr;
 250         const u8 *mac;
 251         int ret;
 252
 253         val_rxcfg = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG);
 254         if (val_rxcfg < 0)
 255                 return val_rxcfg;
 256
 257         val_micr = phy_read(phydev, MII_DP83869_MICR);
 258         if (val_micr < 0)
 259                 return val_micr;
 260
 261         if (wol->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_UCAST |
 262                             WAKE_BCAST)) {
 263                 val_rxcfg |= DP83869_WOL_ENH_MAC;
 264                 val_micr |= MII_DP83869_MICR_WOL_INT_EN;
 265
 266                 if (wol->wolopts & WAKE_MAGIC ||
 267                     wol->wolopts & WAKE_MAGICSECURE) {
 268                         mac = (const u8 *)ndev->dev_addr;
 269
 270                         if (!is_valid_ether_addr(mac))
 271                                 return -EINVAL;
 272
 273                         ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 274                                             DP83869_RXFPMD1,
 275                                             mac[1] << 8 | mac[0]);
 276                         if (ret)
 277                                 return ret;
 278
 279                         ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 280                                             DP83869_RXFPMD2,
 281                                             mac[3] << 8 | mac[2]);
 282                         if (ret)
 283                                 return ret;
 284
 285                         ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 286                                             DP83869_RXFPMD3,
 287                                             mac[5] << 8 | mac[4]);
 288                         if (ret)
 289                                 return ret;
 290
 291                         val_rxcfg |= DP83869_WOL_MAGIC_EN;
 292                 } else {
 293                         val_rxcfg &= ~DP83869_WOL_MAGIC_EN;
 294                 }
 295
 296                 if (wol->wolopts & WAKE_MAGICSECURE) {
 297                         ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 298                                             DP83869_RXFSOP1,
 299                                             (wol->sopass[1] << 8) | wol->sopass[0]);
 300                         if (ret)
 301                                 return ret;
 302
 303                         ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 304                                             DP83869_RXFSOP2,
 305                                             (wol->sopass[3] << 8) | wol->sopass[2]);
 306                         if (ret)
 307                                 return ret;
 308                         ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 309                                             DP83869_RXFSOP3,
 310                                             (wol->sopass[5] << 8) | wol->sopass[4]);
 311                         if (ret)
 312                                 return ret;
 313
 314                         val_rxcfg |= DP83869_WOL_SEC_EN;
 315                 } else {
 316                         val_rxcfg &= ~DP83869_WOL_SEC_EN;
 317                 }
 318
 319                 if (wol->wolopts & WAKE_UCAST)
 320                         val_rxcfg |= DP83869_WOL_UCAST_EN;
 321                 else
 322                         val_rxcfg &= ~DP83869_WOL_UCAST_EN;
 323
 324                 if (wol->wolopts & WAKE_BCAST)
 325                         val_rxcfg |= DP83869_WOL_BCAST_EN;
 326                 else
 327                         val_rxcfg &= ~DP83869_WOL_BCAST_EN;
 328         } else {
 329                 val_rxcfg &= ~DP83869_WOL_ENH_MAC;
 330                 val_micr &= ~MII_DP83869_MICR_WOL_INT_EN;
 331         }
 332
 333         ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG, val_rxcfg);
 334         if (ret)
 335                 return ret;
 336
 337         return phy_write(phydev, MII_DP83869_MICR, val_micr);
 338 }
 339
 340 static void dp83869_get_wol(struct phy_device *phydev,
 341                             struct ethtool_wolinfo *wol)
 342 {
 343         int value, sopass_val;
 344
 345         wol->supported = (WAKE_UCAST | WAKE_BCAST | WAKE_MAGIC |
 346                         WAKE_MAGICSECURE);
 347         wol->wolopts = 0;
 348
 349         value = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG);
 350         if (value < 0) {
 351                 phydev_err(phydev, "Failed to read RX CFG\n");
 352                 return;
 353         }
 354
 355         if (value & DP83869_WOL_UCAST_EN)
 356                 wol->wolopts |= WAKE_UCAST;
 357
 358         if (value & DP83869_WOL_BCAST_EN)
 359                 wol->wolopts |= WAKE_BCAST;
 360
 361         if (value & DP83869_WOL_MAGIC_EN)
 362                 wol->wolopts |= WAKE_MAGIC;
 363
 364         if (value & DP83869_WOL_SEC_EN) {
 365                 sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
 366                                           DP83869_RXFSOP1);
 367                 if (sopass_val < 0) {
 368                         phydev_err(phydev, "Failed to read RX SOP 1\n");
 369                         return;
 370                 }
 371
 372                 wol->sopass[0] = (sopass_val & 0xff);
 373                 wol->sopass[1] = (sopass_val >> 8);
 374
 375                 sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
 376                                           DP83869_RXFSOP2);
 377                 if (sopass_val < 0) {
 378                         phydev_err(phydev, "Failed to read RX SOP 2\n");
 379                         return;
 380                 }
 381
 382                 wol->sopass[2] = (sopass_val & 0xff);
 383                 wol->sopass[3] = (sopass_val >> 8);
 384
 385                 sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
 386                                           DP83869_RXFSOP3);
 387                 if (sopass_val < 0) {
 388                         phydev_err(phydev, "Failed to read RX SOP 3\n");
 389                         return;
 390                 }
 391
 392                 wol->sopass[4] = (sopass_val & 0xff);
 393                 wol->sopass[5] = (sopass_val >> 8);
 394
 395                 wol->wolopts |= WAKE_MAGICSECURE;
 396         }
 397
 398         if (!(value & DP83869_WOL_ENH_MAC))
 399                 wol->wolopts = 0;
 400 }
 401
 402 static int dp83869_get_downshift(struct phy_device *phydev, u8 *data)
 403 {
 404         int val, cnt, enable, count;
 405
 406         val = phy_read(phydev, DP83869_CFG2);
 407         if (val < 0)
 408                 return val;
 409
 410         enable = FIELD_GET(DP83869_DOWNSHIFT_EN, val);
 411         cnt = FIELD_GET(DP83869_DOWNSHIFT_ATTEMPT_MASK, val);
 412
 413         switch (cnt) {
 414         case DP83869_DOWNSHIFT_1_COUNT_VAL:
 415                 count = DP83869_DOWNSHIFT_1_COUNT;
 416                 break;
 417         case DP83869_DOWNSHIFT_2_COUNT_VAL:
 418                 count = DP83869_DOWNSHIFT_2_COUNT;
 419                 break;
 420         case DP83869_DOWNSHIFT_4_COUNT_VAL:
 421                 count = DP83869_DOWNSHIFT_4_COUNT;
 422                 break;
 423         case DP83869_DOWNSHIFT_8_COUNT_VAL:
 424                 count = DP83869_DOWNSHIFT_8_COUNT;
 425                 break;
 426         default:
 427                 return -EINVAL;
 428         }
 429
 430         *data = enable ? count : DOWNSHIFT_DEV_DISABLE;
 431
 432         return 0;
 433 }
 434
 435 static int dp83869_set_downshift(struct phy_device *phydev, u8 cnt)
 436 {
 437         int val, count;
 438
 439         if (cnt > DP83869_DOWNSHIFT_8_COUNT)
 440                 return -EINVAL;
 441
 442         if (!cnt)
 443                 return phy_clear_bits(phydev, DP83869_CFG2,
 444                                       DP83869_DOWNSHIFT_EN);
 445
 446         switch (cnt) {
 447         case DP83869_DOWNSHIFT_1_COUNT:
 448                 count = DP83869_DOWNSHIFT_1_COUNT_VAL;
 449                 break;
 450         case DP83869_DOWNSHIFT_2_COUNT:
 451                 count = DP83869_DOWNSHIFT_2_COUNT_VAL;
 452                 break;
 453         case DP83869_DOWNSHIFT_4_COUNT:
 454                 count = DP83869_DOWNSHIFT_4_COUNT_VAL;
 455                 break;
 456         case DP83869_DOWNSHIFT_8_COUNT:
 457                 count = DP83869_DOWNSHIFT_8_COUNT_VAL;
 458                 break;
 459         default:
 460                 phydev_err(phydev,
 461                            "Downshift count must be 1, 2, 4 or 8\n");
 462                 return -EINVAL;
 463         }
 464
 465         val = DP83869_DOWNSHIFT_EN;
 466         val |= FIELD_PREP(DP83869_DOWNSHIFT_ATTEMPT_MASK, count);
 467
 468         return phy_modify(phydev, DP83869_CFG2,
 469                           DP83869_DOWNSHIFT_EN | DP83869_DOWNSHIFT_ATTEMPT_MASK,
 470                           val);
 471 }
 472
 473 static int dp83869_get_tunable(struct phy_device *phydev,
 474                                struct ethtool_tunable *tuna, void *data)
 475 {
 476         switch (tuna->id) {
 477         case ETHTOOL_PHY_DOWNSHIFT:
 478                 return dp83869_get_downshift(phydev, data);
 479         default:
 480                 return -EOPNOTSUPP;
 481         }
 482 }
 483
 484 static int dp83869_set_tunable(struct phy_device *phydev,
 485                                struct ethtool_tunable *tuna, const void *data)
 486 {
 487         switch (tuna->id) {
 488         case ETHTOOL_PHY_DOWNSHIFT:
 489                 return dp83869_set_downshift(phydev, *(const u8 *)data);
 490         default:
 491                 return -EOPNOTSUPP;
 492         }
 493 }
 494
 495 static int dp83869_config_port_mirroring(struct phy_device *phydev)
 496 {
 497         struct dp83869_private *dp83869 = phydev->priv;
 498
 499         if (dp83869->port_mirroring == DP83869_PORT_MIRRORING_EN)
 500                 return phy_set_bits_mmd(phydev, DP83869_DEVADDR,
 501                                         DP83869_GEN_CFG3,
 502                                         DP83869_CFG3_PORT_MIRROR_EN);
 503         else
 504                 return phy_clear_bits_mmd(phydev, DP83869_DEVADDR,
 505                                           DP83869_GEN_CFG3,
 506                                           DP83869_CFG3_PORT_MIRROR_EN);
 507 }
 508
 509 static int dp83869_set_strapped_mode(struct phy_device *phydev)
 510 {
 511         struct dp83869_private *dp83869 = phydev->priv;
 512         int val;
 513
 514         val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_STRAP_STS1);
 515         if (val < 0)
 516                 return val;
 517
 518         dp83869->mode = val & DP83869_STRAP_OP_MODE_MASK;
 519
 520         return 0;
 521 }
 522
 523 #if IS_ENABLED(CONFIG_OF_MDIO)
 524 static const int dp83869_internal_delay[] = {250, 500, 750, 1000, 1250, 1500,
 525                                              1750, 2000, 2250, 2500, 2750, 3000,
 526                                              3250, 3500, 3750, 4000};
 527
 528 static int dp83869_of_init(struct phy_device *phydev)
 529 {
 530         struct dp83869_private *dp83869 = phydev->priv;
 531         struct device *dev = &phydev->mdio.dev;
 532         struct device_node *of_node = dev->of_node;
 533         int delay_size = ARRAY_SIZE(dp83869_internal_delay);
 534         int ret;
 535
 536         if (!of_node)
 537                 return -ENODEV;
 538
 539         dp83869->io_impedance = -EINVAL;
 540
 541         /* Optional configuration */
 542         ret = of_property_read_u32(of_node, "ti,clk-output-sel",
 543                                    &dp83869->clk_output_sel);
 544         if (ret || dp83869->clk_output_sel > DP83869_CLK_O_SEL_REF_CLK)
 545                 dp83869->clk_output_sel = DP83869_CLK_O_SEL_REF_CLK;
 546
 547         ret = of_property_read_u32(of_node, "ti,op-mode", &dp83869->mode);
 548         if (ret == 0) {
 549                 if (dp83869->mode < DP83869_RGMII_COPPER_ETHERNET ||
 550                     dp83869->mode > DP83869_SGMII_COPPER_ETHERNET)
 551                         return -EINVAL;
 552         } else {
 553                 ret = dp83869_set_strapped_mode(phydev);
 554                 if (ret)
 555                         return ret;
 556         }
 557
 558         if (of_property_read_bool(of_node, "ti,max-output-impedance"))
 559                 dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MAX;
 560         else if (of_property_read_bool(of_node, "ti,min-output-impedance"))
 561                 dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MIN;
 562
 563         if (of_property_read_bool(of_node, "enet-phy-lane-swap")) {
 564                 dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
 565         } else {
 566                 /* If the lane swap is not in the DT then check the straps */
 567                 ret = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_STRAP_STS1);
 568                 if (ret < 0)
 569                         return ret;
 570
 571                 if (ret & DP83869_STRAP_MIRROR_ENABLED)
 572                         dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
 573                 else
 574                         dp83869->port_mirroring = DP83869_PORT_MIRRORING_DIS;
 575
 576                 ret = 0;
 577         }
 578
 579         if (of_property_read_u32(of_node, "rx-fifo-depth",
 580                                  &dp83869->rx_fifo_depth))
 581                 dp83869->rx_fifo_depth = DP83869_PHYCR_FIFO_DEPTH_4_B_NIB;
 582
 583         if (of_property_read_u32(of_node, "tx-fifo-depth",
 584                                  &dp83869->tx_fifo_depth))
 585                 dp83869->tx_fifo_depth = DP83869_PHYCR_FIFO_DEPTH_4_B_NIB;
 586
 587         dp83869->rx_int_delay = phy_get_internal_delay(phydev, dev,
 588                                                        &dp83869_internal_delay[0],
 589                                                        delay_size, true);
 590         if (dp83869->rx_int_delay < 0)
 591                 dp83869->rx_int_delay = DP83869_CLK_DELAY_DEF;
 592
 593         dp83869->tx_int_delay = phy_get_internal_delay(phydev, dev,
 594                                                        &dp83869_internal_delay[0],
 595                                                        delay_size, false);
 596         if (dp83869->tx_int_delay < 0)
 597                 dp83869->tx_int_delay = DP83869_CLK_DELAY_DEF;
 598
 599         return ret;
 600 }
 601 #else
 602 static int dp83869_of_init(struct phy_device *phydev)
 603 {
 604         return dp83869_set_strapped_mode(phydev);
 605 }
 606 #endif /* CONFIG_OF_MDIO */
 607
 608 static int dp83869_configure_rgmii(struct phy_device *phydev,
 609                                    struct dp83869_private *dp83869)
 610 {
 611         int ret = 0, val;
 612
 613         if (phy_interface_is_rgmii(phydev)) {
 614                 val = phy_read(phydev, MII_DP83869_PHYCTRL);
 615                 if (val < 0)
 616                         return val;
 617
 618                 val &= ~DP83869_PHYCR_FIFO_DEPTH_MASK;
 619                 val |= (dp83869->tx_fifo_depth << DP83869_TX_FIFO_SHIFT);
 620                 val |= (dp83869->rx_fifo_depth << DP83869_RX_FIFO_SHIFT);
 621
 622                 ret = phy_write(phydev, MII_DP83869_PHYCTRL, val);
 623                 if (ret)
 624                         return ret;
 625         }
 626
 627         if (dp83869->io_impedance >= 0)
 628                 ret = phy_modify_mmd(phydev, DP83869_DEVADDR,
 629                                      DP83869_IO_MUX_CFG,
 630                                      DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL,
 631                                      dp83869->io_impedance &
 632                                      DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL);
 633
 634         return ret;
 635 }
 636
 637 static int dp83869_configure_fiber(struct phy_device *phydev,
 638                                    struct dp83869_private *dp83869)
 639 {
 640         int bmcr;
 641         int ret;
 642
 643         /* Only allow advertising what this PHY supports */
 644         linkmode_and(phydev->advertising, phydev->advertising,
 645                      phydev->supported);
 646
 647         linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->supported);
 648         linkmode_set_bit(ADVERTISED_FIBRE, phydev->advertising);
 649
 650         if (dp83869->mode == DP83869_RGMII_1000_BASE) {
 651                 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
 652                                  phydev->supported);
 653         } else {
 654                 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT,
 655                                  phydev->supported);
 656                 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT,
 657                                  phydev->supported);
 658
 659                 /* Auto neg is not supported in 100base FX mode */
 660                 bmcr = phy_read(phydev, MII_BMCR);
 661                 if (bmcr < 0)
 662                         return bmcr;
 663
 664                 phydev->autoneg = AUTONEG_DISABLE;
 665                 linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported);
 666                 linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->advertising);
 667
 668                 if (bmcr & BMCR_ANENABLE) {
 669                         ret =  phy_modify(phydev, MII_BMCR, BMCR_ANENABLE, 0);
 670                         if (ret < 0)
 671                                 return ret;
 672                 }
 673         }
 674
 675         /* Update advertising from supported */
 676         linkmode_or(phydev->advertising, phydev->advertising,
 677                     phydev->supported);
 678
 679         return 0;
 680 }
 681
 682 static int dp83869_configure_mode(struct phy_device *phydev,
 683                                   struct dp83869_private *dp83869)
 684 {
 685         int phy_ctrl_val;
 686         int ret;
 687
 688         if (dp83869->mode < DP83869_RGMII_COPPER_ETHERNET ||
 689             dp83869->mode > DP83869_SGMII_COPPER_ETHERNET)
 690                 return -EINVAL;
 691
 692         /* Below init sequence for each operational mode is defined in
 693          * section 9.4.8 of the datasheet.
 694          */
 695         ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE,
 696                             dp83869->mode);
 697         if (ret)
 698                 return ret;
 699
 700         ret = phy_write(phydev, MII_BMCR, MII_DP83869_BMCR_DEFAULT);
 701         if (ret)
 702                 return ret;
 703
 704         phy_ctrl_val = (dp83869->rx_fifo_depth << DP83869_RX_FIFO_SHIFT |
 705                         dp83869->tx_fifo_depth << DP83869_TX_FIFO_SHIFT |
 706                         DP83869_PHY_CTRL_DEFAULT);
 707
 708         switch (dp83869->mode) {
 709         case DP83869_RGMII_COPPER_ETHERNET:
 710                 ret = phy_write(phydev, MII_DP83869_PHYCTRL,
 711                                 phy_ctrl_val);
 712                 if (ret)
 713                         return ret;
 714
 715                 ret = phy_write(phydev, MII_CTRL1000, DP83869_CFG1_DEFAULT);
 716                 if (ret)
 717                         return ret;
 718
 719                 ret = dp83869_configure_rgmii(phydev, dp83869);
 720                 if (ret)
 721                         return ret;
 722                 break;
 723         case DP83869_RGMII_SGMII_BRIDGE:
 724                 ret = phy_modify_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE,
 725                                      DP83869_SGMII_RGMII_BRIDGE,
 726                                      DP83869_SGMII_RGMII_BRIDGE);
 727                 if (ret)
 728                         return ret;
 729
 730                 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 731                                     DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
 732                 if (ret)
 733                         return ret;
 734
 735                 break;
 736         case DP83869_1000M_MEDIA_CONVERT:
 737                 ret = phy_write(phydev, MII_DP83869_PHYCTRL,
 738                                 phy_ctrl_val);
 739                 if (ret)
 740                         return ret;
 741
 742                 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 743                                     DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
 744                 if (ret)
 745                         return ret;
 746                 break;
 747         case DP83869_100M_MEDIA_CONVERT:
 748                 ret = phy_write(phydev, MII_DP83869_PHYCTRL,
 749                                 phy_ctrl_val);
 750                 if (ret)
 751                         return ret;
 752                 break;
 753         case DP83869_SGMII_COPPER_ETHERNET:
 754                 ret = phy_write(phydev, MII_DP83869_PHYCTRL,
 755                                 phy_ctrl_val);
 756                 if (ret)
 757                         return ret;
 758
 759                 ret = phy_write(phydev, MII_CTRL1000, DP83869_CFG1_DEFAULT);
 760                 if (ret)
 761                         return ret;
 762
 763                 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 764                                     DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
 765                 if (ret)
 766                         return ret;
 767
 768                 break;
 769         case DP83869_RGMII_1000_BASE:
 770         case DP83869_RGMII_100_BASE:
 771                 ret = dp83869_configure_fiber(phydev, dp83869);
 772                 break;
 773         default:
 774                 return -EINVAL;
 775         }
 776
 777         return ret;
 778 }
 779
 780 static int dp83869_config_init(struct phy_device *phydev)
 781 {
 782         struct dp83869_private *dp83869 = phydev->priv;
 783         int ret, val;
 784
 785         /* Force speed optimization for the PHY even if it strapped */
 786         ret = phy_modify(phydev, DP83869_CFG2, DP83869_DOWNSHIFT_EN,
 787                          DP83869_DOWNSHIFT_EN);
 788         if (ret)
 789                 return ret;
 790
 791         ret = dp83869_configure_mode(phydev, dp83869);
 792         if (ret)
 793                 return ret;
 794
 795         /* Enable Interrupt output INT_OE in CFG4 register */
 796         if (phy_interrupt_is_valid(phydev)) {
 797                 val = phy_read(phydev, DP83869_CFG4);
 798                 val |= DP83869_INT_OE;
 799                 phy_write(phydev, DP83869_CFG4, val);
 800         }
 801
 802         if (dp83869->port_mirroring != DP83869_PORT_MIRRORING_KEEP)
 803                 dp83869_config_port_mirroring(phydev);
 804
 805         /* Clock output selection if muxing property is set */
 806         if (dp83869->clk_output_sel != DP83869_CLK_O_SEL_REF_CLK)
 807                 ret = phy_modify_mmd(phydev,
 808                                      DP83869_DEVADDR, DP83869_IO_MUX_CFG,
 809                                      DP83869_IO_MUX_CFG_CLK_O_SEL_MASK,
 810                                      dp83869->clk_output_sel <<
 811                                      DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT);
 812
 813         if (phy_interface_is_rgmii(phydev)) {
 814                 ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIIDCTL,
 815                                     dp83869->rx_int_delay |
 816                         dp83869->tx_int_delay << DP83869_RGMII_CLK_DELAY_SHIFT);
 817                 if (ret)
 818                         return ret;
 819
 820                 val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIICTL);
 821                 val |= (DP83869_RGMII_TX_CLK_DELAY_EN |
 822                         DP83869_RGMII_RX_CLK_DELAY_EN);
 823
 824                 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
 825                         val &= ~(DP83869_RGMII_TX_CLK_DELAY_EN |
 826                                  DP83869_RGMII_RX_CLK_DELAY_EN);
 827
 828                 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
 829                         val &= ~DP83869_RGMII_TX_CLK_DELAY_EN;
 830
 831                 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
 832                         val &= ~DP83869_RGMII_RX_CLK_DELAY_EN;
 833
 834                 ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIICTL,
 835                                     val);
 836         }
 837
 838         return ret;
 839 }
 840
 841 static int dp83869_probe(struct phy_device *phydev)
 842 {
 843         struct dp83869_private *dp83869;
 844         int ret;
 845
 846         dp83869 = devm_kzalloc(&phydev->mdio.dev, sizeof(*dp83869),
 847                                GFP_KERNEL);
 848         if (!dp83869)
 849                 return -ENOMEM;
 850
 851         phydev->priv = dp83869;
 852
 853         ret = dp83869_of_init(phydev);
 854         if (ret)
 855                 return ret;
 856
 857         if (dp83869->mode == DP83869_RGMII_100_BASE ||
 858             dp83869->mode == DP83869_RGMII_1000_BASE)
 859                 phydev->port = PORT_FIBRE;
 860
 861         return dp83869_config_init(phydev);
 862 }
 863
 864 static int dp83869_phy_reset(struct phy_device *phydev)
 865 {
 866         int ret;
 867
 868         ret = phy_write(phydev, DP83869_CTRL, DP83869_SW_RESET);
 869         if (ret < 0)
 870                 return ret;
 871
 872         usleep_range(10, 20);
 873
 874         /* Global sw reset sets all registers to default.
 875          * Need to set the registers in the PHY to the right config.
 876          */
 877         return dp83869_config_init(phydev);
 878 }
 879
 880
 881 #define DP83869_PHY_DRIVER(_id, _name)                          \
 882 {                                                               \
 883         PHY_ID_MATCH_MODEL(_id),                                \
 884         .name           = (_name),                              \
 885         .probe          = dp83869_probe,                        \
 886         .config_init    = dp83869_config_init,                  \
 887         .soft_reset     = dp83869_phy_reset,                    \
 888         .config_intr    = dp83869_config_intr,                  \
 889         .handle_interrupt = dp83869_handle_interrupt,           \
 890         .read_status    = dp83869_read_status,                  \
 891         .get_tunable    = dp83869_get_tunable,                  \
 892         .set_tunable    = dp83869_set_tunable,                  \
 893         .get_wol        = dp83869_get_wol,                      \
 894         .set_wol        = dp83869_set_wol,                      \
 895         .suspend        = genphy_suspend,                       \
 896         .resume         = genphy_resume,                        \
 897 }
 898
 899 static struct phy_driver dp83869_driver[] = {
 900         DP83869_PHY_DRIVER(DP83869_PHY_ID, "TI DP83869"),
 901         DP83869_PHY_DRIVER(DP83561_PHY_ID, "TI DP83561-SP"),
 902
 903 };
 904 module_phy_driver(dp83869_driver);
 905
 906 static struct mdio_device_id __maybe_unused dp83869_tbl[] = {
 907         { PHY_ID_MATCH_MODEL(DP83869_PHY_ID) },
 908         { PHY_ID_MATCH_MODEL(DP83561_PHY_ID) },
 909         { }
 910 };
 911 MODULE_DEVICE_TABLE(mdio, dp83869_tbl);
 912
 913 MODULE_DESCRIPTION("Texas Instruments DP83869 PHY driver");
 914 MODULE_AUTHOR("Dan Murphy <[email protected]");
 915 MODULE_LICENSE("GPL v2");