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 DP83869_DEVADDR         0x1f
  20
  21 #define MII_DP83869_PHYCTRL     0x10
  22 #define MII_DP83869_MICR        0x12
  23 #define MII_DP83869_ISR         0x13
  24 #define DP83869_CFG2            0x14
  25 #define DP83869_CTRL            0x1f
  26 #define DP83869_CFG4            0x1e
  27
  28 /* Extended Registers */
  29 #define DP83869_GEN_CFG3        0x0031
  30 #define DP83869_RGMIICTL        0x0032
  31 #define DP83869_STRAP_STS1      0x006e
  32 #define DP83869_RGMIIDCTL       0x0086
  33 #define DP83869_RXFCFG          0x0134
  34 #define DP83869_RXFPMD1         0x0136
  35 #define DP83869_RXFPMD2         0x0137
  36 #define DP83869_RXFPMD3         0x0138
  37 #define DP83869_RXFSOP1         0x0139
  38 #define DP83869_RXFSOP2         0x013A
  39 #define DP83869_RXFSOP3         0x013B
  40 #define DP83869_IO_MUX_CFG      0x0170
  41 #define DP83869_OP_MODE         0x01df
  42 #define DP83869_FX_CTRL         0x0c00
  43
  44 #define DP83869_SW_RESET        BIT(15)
  45 #define DP83869_SW_RESTART      BIT(14)
  46
  47 /* MICR Interrupt bits */
  48 #define MII_DP83869_MICR_AN_ERR_INT_EN          BIT(15)
  49 #define MII_DP83869_MICR_SPEED_CHNG_INT_EN      BIT(14)
  50 #define MII_DP83869_MICR_DUP_MODE_CHNG_INT_EN   BIT(13)
  51 #define MII_DP83869_MICR_PAGE_RXD_INT_EN        BIT(12)
  52 #define MII_DP83869_MICR_AUTONEG_COMP_INT_EN    BIT(11)
  53 #define MII_DP83869_MICR_LINK_STS_CHNG_INT_EN   BIT(10)
  54 #define MII_DP83869_MICR_FALSE_CARRIER_INT_EN   BIT(8)
  55 #define MII_DP83869_MICR_SLEEP_MODE_CHNG_INT_EN BIT(4)
  56 #define MII_DP83869_MICR_WOL_INT_EN             BIT(3)
  57 #define MII_DP83869_MICR_XGMII_ERR_INT_EN       BIT(2)
  58 #define MII_DP83869_MICR_POL_CHNG_INT_EN        BIT(1)
  59 #define MII_DP83869_MICR_JABBER_INT_EN          BIT(0)
  60
  61 #define MII_DP83869_BMCR_DEFAULT        (BMCR_ANENABLE | \
  62                                          BMCR_FULLDPLX | \
  63                                          BMCR_SPEED1000)
  64
  65 #define MII_DP83869_FIBER_ADVERTISE    (ADVERTISED_FIBRE | \
  66                                         ADVERTISED_Pause | \
  67                                         ADVERTISED_Asym_Pause)
  68
  69 /* This is the same bit mask as the BMCR so re-use the BMCR default */
  70 #define DP83869_FX_CTRL_DEFAULT MII_DP83869_BMCR_DEFAULT
  71
  72 /* CFG1 bits */
  73 #define DP83869_CFG1_DEFAULT    (ADVERTISE_1000HALF | \
  74                                  ADVERTISE_1000FULL | \
  75                                  CTL1000_AS_MASTER)
  76
  77 /* RGMIICTL bits */
  78 #define DP83869_RGMII_TX_CLK_DELAY_EN           BIT(1)
  79 #define DP83869_RGMII_RX_CLK_DELAY_EN           BIT(0)
  80
  81 /* RGMIIDCTL */
  82 #define DP83869_RGMII_CLK_DELAY_SHIFT           4
  83 #define DP83869_CLK_DELAY_DEF                   7
  84
  85 /* STRAP_STS1 bits */
  86 #define DP83869_STRAP_OP_MODE_MASK              GENMASK(2, 0)
  87 #define DP83869_STRAP_STS1_RESERVED             BIT(11)
  88 #define DP83869_STRAP_MIRROR_ENABLED           BIT(12)
  89
  90 /* PHYCTRL bits */
  91 #define DP83869_RX_FIFO_SHIFT   12
  92 #define DP83869_TX_FIFO_SHIFT   14
  93
  94 /* PHY_CTRL lower bytes 0x48 are declared as reserved */
  95 #define DP83869_PHY_CTRL_DEFAULT        0x48
  96 #define DP83869_PHYCR_FIFO_DEPTH_MASK   GENMASK(15, 12)
  97 #define DP83869_PHYCR_RESERVED_MASK     BIT(11)
  98
  99 /* IO_MUX_CFG bits */
 100 #define DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL    0x1f
 101
 102 #define DP83869_IO_MUX_CFG_IO_IMPEDANCE_MAX     0x0
 103 #define DP83869_IO_MUX_CFG_IO_IMPEDANCE_MIN     0x1f
 104 #define DP83869_IO_MUX_CFG_CLK_O_SEL_MASK       (0x1f << 8)
 105 #define DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT      8
 106
 107 /* CFG3 bits */
 108 #define DP83869_CFG3_PORT_MIRROR_EN              BIT(0)
 109
 110 /* CFG4 bits */
 111 #define DP83869_INT_OE  BIT(7)
 112
 113 /* OP MODE */
 114 #define DP83869_OP_MODE_MII                     BIT(5)
 115 #define DP83869_SGMII_RGMII_BRIDGE              BIT(6)
 116
 117 /* RXFCFG bits*/
 118 #define DP83869_WOL_MAGIC_EN            BIT(0)
 119 #define DP83869_WOL_PATTERN_EN          BIT(1)
 120 #define DP83869_WOL_BCAST_EN            BIT(2)
 121 #define DP83869_WOL_UCAST_EN            BIT(4)
 122 #define DP83869_WOL_SEC_EN              BIT(5)
 123 #define DP83869_WOL_ENH_MAC             BIT(7)
 124
 125 /* CFG2 bits */
 126 #define DP83869_DOWNSHIFT_EN            (BIT(8) | BIT(9))
 127 #define DP83869_DOWNSHIFT_ATTEMPT_MASK  (BIT(10) | BIT(11))
 128 #define DP83869_DOWNSHIFT_1_COUNT_VAL   0
 129 #define DP83869_DOWNSHIFT_2_COUNT_VAL   1
 130 #define DP83869_DOWNSHIFT_4_COUNT_VAL   2
 131 #define DP83869_DOWNSHIFT_8_COUNT_VAL   3
 132 #define DP83869_DOWNSHIFT_1_COUNT       1
 133 #define DP83869_DOWNSHIFT_2_COUNT       2
 134 #define DP83869_DOWNSHIFT_4_COUNT       4
 135 #define DP83869_DOWNSHIFT_8_COUNT       8
 136
 137 enum {
 138         DP83869_PORT_MIRRORING_KEEP,
 139         DP83869_PORT_MIRRORING_EN,
 140         DP83869_PORT_MIRRORING_DIS,
 141 };
 142
 143 struct dp83869_private {
 144         int tx_fifo_depth;
 145         int rx_fifo_depth;
 146         s32 rx_int_delay;
 147         s32 tx_int_delay;
 148         int io_impedance;
 149         int port_mirroring;
 150         bool rxctrl_strap_quirk;
 151         int clk_output_sel;
 152         int mode;
 153 };
 154
 155 static int dp83869_read_status(struct phy_device *phydev)
 156 {
 157         struct dp83869_private *dp83869 = phydev->priv;
 158         int ret;
 159
 160         ret = genphy_read_status(phydev);
 161         if (ret)
 162                 return ret;
 163
 164         if (linkmode_test_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->supported)) {
 165                 if (phydev->link) {
 166                         if (dp83869->mode == DP83869_RGMII_100_BASE)
 167                                 phydev->speed = SPEED_100;
 168                 } else {
 169                         phydev->speed = SPEED_UNKNOWN;
 170                         phydev->duplex = DUPLEX_UNKNOWN;
 171                 }
 172         }
 173
 174         return 0;
 175 }
 176
 177 static int dp83869_ack_interrupt(struct phy_device *phydev)
 178 {
 179         int err = phy_read(phydev, MII_DP83869_ISR);
 180
 181         if (err < 0)
 182                 return err;
 183
 184         return 0;
 185 }
 186
 187 static int dp83869_config_intr(struct phy_device *phydev)
 188 {
 189         int micr_status = 0, err;
 190
 191         if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
 192                 err = dp83869_ack_interrupt(phydev);
 193                 if (err)
 194                         return err;
 195
 196                 micr_status = phy_read(phydev, MII_DP83869_MICR);
 197                 if (micr_status < 0)
 198                         return micr_status;
 199
 200                 micr_status |=
 201                         (MII_DP83869_MICR_AN_ERR_INT_EN |
 202                         MII_DP83869_MICR_SPEED_CHNG_INT_EN |
 203                         MII_DP83869_MICR_AUTONEG_COMP_INT_EN |
 204                         MII_DP83869_MICR_LINK_STS_CHNG_INT_EN |
 205                         MII_DP83869_MICR_DUP_MODE_CHNG_INT_EN |
 206                         MII_DP83869_MICR_SLEEP_MODE_CHNG_INT_EN);
 207
 208                 err = phy_write(phydev, MII_DP83869_MICR, micr_status);
 209         } else {
 210                 err = phy_write(phydev, MII_DP83869_MICR, micr_status);
 211                 if (err)
 212                         return err;
 213
 214                 err = dp83869_ack_interrupt(phydev);
 215         }
 216
 217         return err;
 218 }
 219
 220 static irqreturn_t dp83869_handle_interrupt(struct phy_device *phydev)
 221 {
 222         int irq_status, irq_enabled;
 223
 224         irq_status = phy_read(phydev, MII_DP83869_ISR);
 225         if (irq_status < 0) {
 226                 phy_error(phydev);
 227                 return IRQ_NONE;
 228         }
 229
 230         irq_enabled = phy_read(phydev, MII_DP83869_MICR);
 231         if (irq_enabled < 0) {
 232                 phy_error(phydev);
 233                 return IRQ_NONE;
 234         }
 235
 236         if (!(irq_status & irq_enabled))
 237                 return IRQ_NONE;
 238
 239         phy_trigger_machine(phydev);
 240
 241         return IRQ_HANDLED;
 242 }
 243
 244 static int dp83869_set_wol(struct phy_device *phydev,
 245                            struct ethtool_wolinfo *wol)
 246 {
 247         struct net_device *ndev = phydev->attached_dev;
 248         int val_rxcfg, val_micr;
 249         u8 *mac;
 250         int ret;
 251
 252         val_rxcfg = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG);
 253         if (val_rxcfg < 0)
 254                 return val_rxcfg;
 255
 256         val_micr = phy_read(phydev, MII_DP83869_MICR);
 257         if (val_micr < 0)
 258                 return val_micr;
 259
 260         if (wol->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_UCAST |
 261                             WAKE_BCAST)) {
 262                 val_rxcfg |= DP83869_WOL_ENH_MAC;
 263                 val_micr |= MII_DP83869_MICR_WOL_INT_EN;
 264
 265                 if (wol->wolopts & WAKE_MAGIC ||
 266                     wol->wolopts & WAKE_MAGICSECURE) {
 267                         mac = (u8 *)ndev->dev_addr;
 268
 269                         if (!is_valid_ether_addr(mac))
 270                                 return -EINVAL;
 271
 272                         ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 273                                             DP83869_RXFPMD1,
 274                                             mac[1] << 8 | mac[0]);
 275                         if (ret)
 276                                 return ret;
 277
 278                         ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 279                                             DP83869_RXFPMD2,
 280                                             mac[3] << 8 | mac[2]);
 281                         if (ret)
 282                                 return ret;
 283
 284                         ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 285                                             DP83869_RXFPMD3,
 286                                             mac[5] << 8 | mac[4]);
 287                         if (ret)
 288                                 return ret;
 289
 290                         val_rxcfg |= DP83869_WOL_MAGIC_EN;
 291                 } else {
 292                         val_rxcfg &= ~DP83869_WOL_MAGIC_EN;
 293                 }
 294
 295                 if (wol->wolopts & WAKE_MAGICSECURE) {
 296                         ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 297                                             DP83869_RXFSOP1,
 298                                             (wol->sopass[1] << 8) | wol->sopass[0]);
 299                         if (ret)
 300                                 return ret;
 301
 302                         ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 303                                             DP83869_RXFSOP2,
 304                                             (wol->sopass[3] << 8) | wol->sopass[2]);
 305                         if (ret)
 306                                 return ret;
 307                         ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 308                                             DP83869_RXFSOP3,
 309                                             (wol->sopass[5] << 8) | wol->sopass[4]);
 310                         if (ret)
 311                                 return ret;
 312
 313                         val_rxcfg |= DP83869_WOL_SEC_EN;
 314                 } else {
 315                         val_rxcfg &= ~DP83869_WOL_SEC_EN;
 316                 }
 317
 318                 if (wol->wolopts & WAKE_UCAST)
 319                         val_rxcfg |= DP83869_WOL_UCAST_EN;
 320                 else
 321                         val_rxcfg &= ~DP83869_WOL_UCAST_EN;
 322
 323                 if (wol->wolopts & WAKE_BCAST)
 324                         val_rxcfg |= DP83869_WOL_BCAST_EN;
 325                 else
 326                         val_rxcfg &= ~DP83869_WOL_BCAST_EN;
 327         } else {
 328                 val_rxcfg &= ~DP83869_WOL_ENH_MAC;
 329                 val_micr &= ~MII_DP83869_MICR_WOL_INT_EN;
 330         }
 331
 332         ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG, val_rxcfg);
 333         if (ret)
 334                 return ret;
 335
 336         return phy_write(phydev, MII_DP83869_MICR, val_micr);
 337 }
 338
 339 static void dp83869_get_wol(struct phy_device *phydev,
 340                             struct ethtool_wolinfo *wol)
 341 {
 342         int value, sopass_val;
 343
 344         wol->supported = (WAKE_UCAST | WAKE_BCAST | WAKE_MAGIC |
 345                         WAKE_MAGICSECURE);
 346         wol->wolopts = 0;
 347
 348         value = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG);
 349         if (value < 0) {
 350                 phydev_err(phydev, "Failed to read RX CFG\n");
 351                 return;
 352         }
 353
 354         if (value & DP83869_WOL_UCAST_EN)
 355                 wol->wolopts |= WAKE_UCAST;
 356
 357         if (value & DP83869_WOL_BCAST_EN)
 358                 wol->wolopts |= WAKE_BCAST;
 359
 360         if (value & DP83869_WOL_MAGIC_EN)
 361                 wol->wolopts |= WAKE_MAGIC;
 362
 363         if (value & DP83869_WOL_SEC_EN) {
 364                 sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
 365                                           DP83869_RXFSOP1);
 366                 if (sopass_val < 0) {
 367                         phydev_err(phydev, "Failed to read RX SOP 1\n");
 368                         return;
 369                 }
 370
 371                 wol->sopass[0] = (sopass_val & 0xff);
 372                 wol->sopass[1] = (sopass_val >> 8);
 373
 374                 sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
 375                                           DP83869_RXFSOP2);
 376                 if (sopass_val < 0) {
 377                         phydev_err(phydev, "Failed to read RX SOP 2\n");
 378                         return;
 379                 }
 380
 381                 wol->sopass[2] = (sopass_val & 0xff);
 382                 wol->sopass[3] = (sopass_val >> 8);
 383
 384                 sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
 385                                           DP83869_RXFSOP3);
 386                 if (sopass_val < 0) {
 387                         phydev_err(phydev, "Failed to read RX SOP 3\n");
 388                         return;
 389                 }
 390
 391                 wol->sopass[4] = (sopass_val & 0xff);
 392                 wol->sopass[5] = (sopass_val >> 8);
 393
 394                 wol->wolopts |= WAKE_MAGICSECURE;
 395         }
 396
 397         if (!(value & DP83869_WOL_ENH_MAC))
 398                 wol->wolopts = 0;
 399 }
 400
 401 static int dp83869_get_downshift(struct phy_device *phydev, u8 *data)
 402 {
 403         int val, cnt, enable, count;
 404
 405         val = phy_read(phydev, DP83869_CFG2);
 406         if (val < 0)
 407                 return val;
 408
 409         enable = FIELD_GET(DP83869_DOWNSHIFT_EN, val);
 410         cnt = FIELD_GET(DP83869_DOWNSHIFT_ATTEMPT_MASK, val);
 411
 412         switch (cnt) {
 413         case DP83869_DOWNSHIFT_1_COUNT_VAL:
 414                 count = DP83869_DOWNSHIFT_1_COUNT;
 415                 break;
 416         case DP83869_DOWNSHIFT_2_COUNT_VAL:
 417                 count = DP83869_DOWNSHIFT_2_COUNT;
 418                 break;
 419         case DP83869_DOWNSHIFT_4_COUNT_VAL:
 420                 count = DP83869_DOWNSHIFT_4_COUNT;
 421                 break;
 422         case DP83869_DOWNSHIFT_8_COUNT_VAL:
 423                 count = DP83869_DOWNSHIFT_8_COUNT;
 424                 break;
 425         default:
 426                 return -EINVAL;
 427         }
 428
 429         *data = enable ? count : DOWNSHIFT_DEV_DISABLE;
 430
 431         return 0;
 432 }
 433
 434 static int dp83869_set_downshift(struct phy_device *phydev, u8 cnt)
 435 {
 436         int val, count;
 437
 438         if (cnt > DP83869_DOWNSHIFT_8_COUNT)
 439                 return -EINVAL;
 440
 441         if (!cnt)
 442                 return phy_clear_bits(phydev, DP83869_CFG2,
 443                                       DP83869_DOWNSHIFT_EN);
 444
 445         switch (cnt) {
 446         case DP83869_DOWNSHIFT_1_COUNT:
 447                 count = DP83869_DOWNSHIFT_1_COUNT_VAL;
 448                 break;
 449         case DP83869_DOWNSHIFT_2_COUNT:
 450                 count = DP83869_DOWNSHIFT_2_COUNT_VAL;
 451                 break;
 452         case DP83869_DOWNSHIFT_4_COUNT:
 453                 count = DP83869_DOWNSHIFT_4_COUNT_VAL;
 454                 break;
 455         case DP83869_DOWNSHIFT_8_COUNT:
 456                 count = DP83869_DOWNSHIFT_8_COUNT_VAL;
 457                 break;
 458         default:
 459                 phydev_err(phydev,
 460                            "Downshift count must be 1, 2, 4 or 8\n");
 461                 return -EINVAL;
 462         }
 463
 464         val = DP83869_DOWNSHIFT_EN;
 465         val |= FIELD_PREP(DP83869_DOWNSHIFT_ATTEMPT_MASK, count);
 466
 467         return phy_modify(phydev, DP83869_CFG2,
 468                           DP83869_DOWNSHIFT_EN | DP83869_DOWNSHIFT_ATTEMPT_MASK,
 469                           val);
 470 }
 471
 472 static int dp83869_get_tunable(struct phy_device *phydev,
 473                                struct ethtool_tunable *tuna, void *data)
 474 {
 475         switch (tuna->id) {
 476         case ETHTOOL_PHY_DOWNSHIFT:
 477                 return dp83869_get_downshift(phydev, data);
 478         default:
 479                 return -EOPNOTSUPP;
 480         }
 481 }
 482
 483 static int dp83869_set_tunable(struct phy_device *phydev,
 484                                struct ethtool_tunable *tuna, const void *data)
 485 {
 486         switch (tuna->id) {
 487         case ETHTOOL_PHY_DOWNSHIFT:
 488                 return dp83869_set_downshift(phydev, *(const u8 *)data);
 489         default:
 490                 return -EOPNOTSUPP;
 491         }
 492 }
 493
 494 static int dp83869_config_port_mirroring(struct phy_device *phydev)
 495 {
 496         struct dp83869_private *dp83869 = phydev->priv;
 497
 498         if (dp83869->port_mirroring == DP83869_PORT_MIRRORING_EN)
 499                 return phy_set_bits_mmd(phydev, DP83869_DEVADDR,
 500                                         DP83869_GEN_CFG3,
 501                                         DP83869_CFG3_PORT_MIRROR_EN);
 502         else
 503                 return phy_clear_bits_mmd(phydev, DP83869_DEVADDR,
 504                                           DP83869_GEN_CFG3,
 505                                           DP83869_CFG3_PORT_MIRROR_EN);
 506 }
 507
 508 static int dp83869_set_strapped_mode(struct phy_device *phydev)
 509 {
 510         struct dp83869_private *dp83869 = phydev->priv;
 511         int val;
 512
 513         val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_STRAP_STS1);
 514         if (val < 0)
 515                 return val;
 516
 517         dp83869->mode = val & DP83869_STRAP_OP_MODE_MASK;
 518
 519         return 0;
 520 }
 521
 522 #if IS_ENABLED(CONFIG_OF_MDIO)
 523 static const int dp83869_internal_delay[] = {250, 500, 750, 1000, 1250, 1500,
 524                                              1750, 2000, 2250, 2500, 2750, 3000,
 525                                              3250, 3500, 3750, 4000};
 526
 527 static int dp83869_of_init(struct phy_device *phydev)
 528 {
 529         struct dp83869_private *dp83869 = phydev->priv;
 530         struct device *dev = &phydev->mdio.dev;
 531         struct device_node *of_node = dev->of_node;
 532         int delay_size = ARRAY_SIZE(dp83869_internal_delay);
 533         int ret;
 534
 535         if (!of_node)
 536                 return -ENODEV;
 537
 538         dp83869->io_impedance = -EINVAL;
 539
 540         /* Optional configuration */
 541         ret = of_property_read_u32(of_node, "ti,clk-output-sel",
 542                                    &dp83869->clk_output_sel);
 543         if (ret || dp83869->clk_output_sel > DP83869_CLK_O_SEL_REF_CLK)
 544                 dp83869->clk_output_sel = DP83869_CLK_O_SEL_REF_CLK;
 545
 546         ret = of_property_read_u32(of_node, "ti,op-mode", &dp83869->mode);
 547         if (ret == 0) {
 548                 if (dp83869->mode < DP83869_RGMII_COPPER_ETHERNET ||
 549                     dp83869->mode > DP83869_SGMII_COPPER_ETHERNET)
 550                         return -EINVAL;
 551         } else {
 552                 ret = dp83869_set_strapped_mode(phydev);
 553                 if (ret)
 554                         return ret;
 555         }
 556
 557         if (of_property_read_bool(of_node, "ti,max-output-impedance"))
 558                 dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MAX;
 559         else if (of_property_read_bool(of_node, "ti,min-output-impedance"))
 560                 dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MIN;
 561
 562         if (of_property_read_bool(of_node, "enet-phy-lane-swap")) {
 563                 dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
 564         } else {
 565                 /* If the lane swap is not in the DT then check the straps */
 566                 ret = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_STRAP_STS1);
 567                 if (ret < 0)
 568                         return ret;
 569
 570                 if (ret & DP83869_STRAP_MIRROR_ENABLED)
 571                         dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
 572                 else
 573                         dp83869->port_mirroring = DP83869_PORT_MIRRORING_DIS;
 574
 575                 ret = 0;
 576         }
 577
 578         if (of_property_read_u32(of_node, "rx-fifo-depth",
 579                                  &dp83869->rx_fifo_depth))
 580                 dp83869->rx_fifo_depth = DP83869_PHYCR_FIFO_DEPTH_4_B_NIB;
 581
 582         if (of_property_read_u32(of_node, "tx-fifo-depth",
 583                                  &dp83869->tx_fifo_depth))
 584                 dp83869->tx_fifo_depth = DP83869_PHYCR_FIFO_DEPTH_4_B_NIB;
 585
 586         dp83869->rx_int_delay = phy_get_internal_delay(phydev, dev,
 587                                                        &dp83869_internal_delay[0],
 588                                                        delay_size, true);
 589         if (dp83869->rx_int_delay < 0)
 590                 dp83869->rx_int_delay =
 591                                 dp83869_internal_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 =
 598                                 dp83869_internal_delay[DP83869_CLK_DELAY_DEF];
 599
 600         return ret;
 601 }
 602 #else
 603 static int dp83869_of_init(struct phy_device *phydev)
 604 {
 605         return dp83869_set_strapped_mode(phydev);
 606 }
 607 #endif /* CONFIG_OF_MDIO */
 608
 609 static int dp83869_configure_rgmii(struct phy_device *phydev,
 610                                    struct dp83869_private *dp83869)
 611 {
 612         int ret = 0, val;
 613
 614         if (phy_interface_is_rgmii(phydev)) {
 615                 val = phy_read(phydev, MII_DP83869_PHYCTRL);
 616                 if (val < 0)
 617                         return val;
 618
 619                 val &= ~DP83869_PHYCR_FIFO_DEPTH_MASK;
 620                 val |= (dp83869->tx_fifo_depth << DP83869_TX_FIFO_SHIFT);
 621                 val |= (dp83869->rx_fifo_depth << DP83869_RX_FIFO_SHIFT);
 622
 623                 ret = phy_write(phydev, MII_DP83869_PHYCTRL, val);
 624                 if (ret)
 625                         return ret;
 626         }
 627
 628         if (dp83869->io_impedance >= 0)
 629                 ret = phy_modify_mmd(phydev, DP83869_DEVADDR,
 630                                      DP83869_IO_MUX_CFG,
 631                                      DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL,
 632                                      dp83869->io_impedance &
 633                                      DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL);
 634
 635         return ret;
 636 }
 637
 638 static int dp83869_configure_fiber(struct phy_device *phydev,
 639                                    struct dp83869_private *dp83869)
 640 {
 641         int bmcr;
 642         int ret;
 643
 644         /* Only allow advertising what this PHY supports */
 645         linkmode_and(phydev->advertising, phydev->advertising,
 646                      phydev->supported);
 647
 648         linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->supported);
 649         linkmode_set_bit(ADVERTISED_FIBRE, phydev->advertising);
 650
 651         if (dp83869->mode == DP83869_RGMII_1000_BASE) {
 652                 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
 653                                  phydev->supported);
 654         } else {
 655                 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT,
 656                                  phydev->supported);
 657                 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT,
 658                                  phydev->supported);
 659
 660                 /* Auto neg is not supported in 100base FX mode */
 661                 bmcr = phy_read(phydev, MII_BMCR);
 662                 if (bmcr < 0)
 663                         return bmcr;
 664
 665                 phydev->autoneg = AUTONEG_DISABLE;
 666                 linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported);
 667                 linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->advertising);
 668
 669                 if (bmcr & BMCR_ANENABLE) {
 670                         ret =  phy_modify(phydev, MII_BMCR, BMCR_ANENABLE, 0);
 671                         if (ret < 0)
 672                                 return ret;
 673                 }
 674         }
 675
 676         /* Update advertising from supported */
 677         linkmode_or(phydev->advertising, phydev->advertising,
 678                     phydev->supported);
 679
 680         return 0;
 681 }
 682
 683 static int dp83869_configure_mode(struct phy_device *phydev,
 684                                   struct dp83869_private *dp83869)
 685 {
 686         int phy_ctrl_val;
 687         int ret;
 688
 689         if (dp83869->mode < DP83869_RGMII_COPPER_ETHERNET ||
 690             dp83869->mode > DP83869_SGMII_COPPER_ETHERNET)
 691                 return -EINVAL;
 692
 693         /* Below init sequence for each operational mode is defined in
 694          * section 9.4.8 of the datasheet.
 695          */
 696         ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE,
 697                             dp83869->mode);
 698         if (ret)
 699                 return ret;
 700
 701         ret = phy_write(phydev, MII_BMCR, MII_DP83869_BMCR_DEFAULT);
 702         if (ret)
 703                 return ret;
 704
 705         phy_ctrl_val = (dp83869->rx_fifo_depth << DP83869_RX_FIFO_SHIFT |
 706                         dp83869->tx_fifo_depth << DP83869_TX_FIFO_SHIFT |
 707                         DP83869_PHY_CTRL_DEFAULT);
 708
 709         switch (dp83869->mode) {
 710         case DP83869_RGMII_COPPER_ETHERNET:
 711                 ret = phy_write(phydev, MII_DP83869_PHYCTRL,
 712                                 phy_ctrl_val);
 713                 if (ret)
 714                         return ret;
 715
 716                 ret = phy_write(phydev, MII_CTRL1000, DP83869_CFG1_DEFAULT);
 717                 if (ret)
 718                         return ret;
 719
 720                 ret = dp83869_configure_rgmii(phydev, dp83869);
 721                 if (ret)
 722                         return ret;
 723                 break;
 724         case DP83869_RGMII_SGMII_BRIDGE:
 725                 ret = phy_modify_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE,
 726                                      DP83869_SGMII_RGMII_BRIDGE,
 727                                      DP83869_SGMII_RGMII_BRIDGE);
 728                 if (ret)
 729                         return ret;
 730
 731                 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 732                                     DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
 733                 if (ret)
 734                         return ret;
 735
 736                 break;
 737         case DP83869_1000M_MEDIA_CONVERT:
 738                 ret = phy_write(phydev, MII_DP83869_PHYCTRL,
 739                                 phy_ctrl_val);
 740                 if (ret)
 741                         return ret;
 742
 743                 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 744                                     DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
 745                 if (ret)
 746                         return ret;
 747                 break;
 748         case DP83869_100M_MEDIA_CONVERT:
 749                 ret = phy_write(phydev, MII_DP83869_PHYCTRL,
 750                                 phy_ctrl_val);
 751                 if (ret)
 752                         return ret;
 753                 break;
 754         case DP83869_SGMII_COPPER_ETHERNET:
 755                 ret = phy_write(phydev, MII_DP83869_PHYCTRL,
 756                                 phy_ctrl_val);
 757                 if (ret)
 758                         return ret;
 759
 760                 ret = phy_write(phydev, MII_CTRL1000, DP83869_CFG1_DEFAULT);
 761                 if (ret)
 762                         return ret;
 763
 764                 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
 765                                     DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
 766                 if (ret)
 767                         return ret;
 768
 769                 break;
 770         case DP83869_RGMII_1000_BASE:
 771         case DP83869_RGMII_100_BASE:
 772                 ret = dp83869_configure_fiber(phydev, dp83869);
 773                 break;
 774         default:
 775                 return -EINVAL;
 776         }
 777
 778         return ret;
 779 }
 780
 781 static int dp83869_config_init(struct phy_device *phydev)
 782 {
 783         struct dp83869_private *dp83869 = phydev->priv;
 784         int ret, val;
 785
 786         /* Force speed optimization for the PHY even if it strapped */
 787         ret = phy_modify(phydev, DP83869_CFG2, DP83869_DOWNSHIFT_EN,
 788                          DP83869_DOWNSHIFT_EN);
 789         if (ret)
 790                 return ret;
 791
 792         ret = dp83869_configure_mode(phydev, dp83869);
 793         if (ret)
 794                 return ret;
 795
 796         /* Enable Interrupt output INT_OE in CFG4 register */
 797         if (phy_interrupt_is_valid(phydev)) {
 798                 val = phy_read(phydev, DP83869_CFG4);
 799                 val |= DP83869_INT_OE;
 800                 phy_write(phydev, DP83869_CFG4, val);
 801         }
 802
 803         if (dp83869->port_mirroring != DP83869_PORT_MIRRORING_KEEP)
 804                 dp83869_config_port_mirroring(phydev);
 805
 806         /* Clock output selection if muxing property is set */
 807         if (dp83869->clk_output_sel != DP83869_CLK_O_SEL_REF_CLK)
 808                 ret = phy_modify_mmd(phydev,
 809                                      DP83869_DEVADDR, DP83869_IO_MUX_CFG,
 810                                      DP83869_IO_MUX_CFG_CLK_O_SEL_MASK,
 811                                      dp83869->clk_output_sel <<
 812                                      DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT);
 813
 814         if (phy_interface_is_rgmii(phydev)) {
 815                 ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIIDCTL,
 816                                     dp83869->rx_int_delay |
 817                         dp83869->tx_int_delay << DP83869_RGMII_CLK_DELAY_SHIFT);
 818                 if (ret)
 819                         return ret;
 820
 821                 val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIICTL);
 822                 val |= (DP83869_RGMII_TX_CLK_DELAY_EN |
 823                         DP83869_RGMII_RX_CLK_DELAY_EN);
 824
 825                 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
 826                         val &= ~(DP83869_RGMII_TX_CLK_DELAY_EN |
 827                                  DP83869_RGMII_RX_CLK_DELAY_EN);
 828
 829                 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
 830                         val &= ~DP83869_RGMII_TX_CLK_DELAY_EN;
 831
 832                 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
 833                         val &= ~DP83869_RGMII_RX_CLK_DELAY_EN;
 834
 835                 ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIICTL,
 836                                     val);
 837         }
 838
 839         return ret;
 840 }
 841
 842 static int dp83869_probe(struct phy_device *phydev)
 843 {
 844         struct dp83869_private *dp83869;
 845         int ret;
 846
 847         dp83869 = devm_kzalloc(&phydev->mdio.dev, sizeof(*dp83869),
 848                                GFP_KERNEL);
 849         if (!dp83869)
 850                 return -ENOMEM;
 851
 852         phydev->priv = dp83869;
 853
 854         ret = dp83869_of_init(phydev);
 855         if (ret)
 856                 return ret;
 857
 858         return dp83869_config_init(phydev);
 859 }
 860
 861 static int dp83869_phy_reset(struct phy_device *phydev)
 862 {
 863         int ret;
 864
 865         ret = phy_write(phydev, DP83869_CTRL, DP83869_SW_RESET);
 866         if (ret < 0)
 867                 return ret;
 868
 869         usleep_range(10, 20);
 870
 871         /* Global sw reset sets all registers to default.
 872          * Need to set the registers in the PHY to the right config.
 873          */
 874         return dp83869_config_init(phydev);
 875 }
 876
 877 static struct phy_driver dp83869_driver[] = {
 878         {
 879                 PHY_ID_MATCH_MODEL(DP83869_PHY_ID),
 880                 .name           = "TI DP83869",
 881
 882                 .probe          = dp83869_probe,
 883                 .config_init    = dp83869_config_init,
 884                 .soft_reset     = dp83869_phy_reset,
 885
 886                 /* IRQ related */
 887                 .config_intr    = dp83869_config_intr,
 888                 .handle_interrupt = dp83869_handle_interrupt,
 889                 .read_status    = dp83869_read_status,
 890
 891                 .get_tunable    = dp83869_get_tunable,
 892                 .set_tunable    = dp83869_set_tunable,
 893
 894                 .get_wol        = dp83869_get_wol,
 895                 .set_wol        = dp83869_set_wol,
 896
 897                 .suspend        = genphy_suspend,
 898                 .resume         = genphy_resume,
 899         },
 900 };
 901 module_phy_driver(dp83869_driver);
 902
 903 static struct mdio_device_id __maybe_unused dp83869_tbl[] = {
 904         { PHY_ID_MATCH_MODEL(DP83869_PHY_ID) },
 905         { }
 906 };
 907 MODULE_DEVICE_TABLE(mdio, dp83869_tbl);
 908
 909 MODULE_DESCRIPTION("Texas Instruments DP83869 PHY driver");
 910 MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com");
 911 MODULE_LICENSE("GPL v2");