drivers/net/phy/dp83822.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Driver for the Texas Instruments DP83822, DP83825 and DP83826 PHYs.
   3  *
   4  * Copyright (C) 2017 Texas Instruments Inc.
   5  */
   6
   7 #include <linux/ethtool.h>
   8 #include <linux/etherdevice.h>
   9 #include <linux/kernel.h>
  10 #include <linux/mii.h>
  11 #include <linux/module.h>
  12 #include <linux/of.h>
  13 #include <linux/phy.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/bitfield.h>
  16
  17 #define DP83822_PHY_ID          0x2000a240
  18 #define DP83825S_PHY_ID         0x2000a140
  19 #define DP83825I_PHY_ID         0x2000a150
  20 #define DP83825CM_PHY_ID        0x2000a160
  21 #define DP83825CS_PHY_ID        0x2000a170
  22 #define DP83826C_PHY_ID         0x2000a130
  23 #define DP83826NC_PHY_ID        0x2000a110
  24
  25 #define DP83822_DEVADDR         0x1f
  26
  27 #define MII_DP83822_CTRL_2      0x0a
  28 #define MII_DP83822_PHYSTS      0x10
  29 #define MII_DP83822_PHYSCR      0x11
  30 #define MII_DP83822_MISR1       0x12
  31 #define MII_DP83822_MISR2       0x13
  32 #define MII_DP83822_FCSCR       0x14
  33 #define MII_DP83822_RCSR        0x17
  34 #define MII_DP83822_RESET_CTRL  0x1f
  35 #define MII_DP83822_GENCFG      0x465
  36 #define MII_DP83822_SOR1        0x467
  37
  38 /* DP83826 specific registers */
  39 #define MII_DP83826_VOD_CFG1    0x30b
  40 #define MII_DP83826_VOD_CFG2    0x30c
  41
  42 /* GENCFG */
  43 #define DP83822_SIG_DET_LOW     BIT(0)
  44
  45 /* Control Register 2 bits */
  46 #define DP83822_FX_ENABLE       BIT(14)
  47
  48 #define DP83822_HW_RESET        BIT(15)
  49 #define DP83822_SW_RESET        BIT(14)
  50
  51 /* PHY STS bits */
  52 #define DP83822_PHYSTS_DUPLEX                   BIT(2)
  53 #define DP83822_PHYSTS_10                       BIT(1)
  54 #define DP83822_PHYSTS_LINK                     BIT(0)
  55
  56 /* PHYSCR Register Fields */
  57 #define DP83822_PHYSCR_INT_OE           BIT(0) /* Interrupt Output Enable */
  58 #define DP83822_PHYSCR_INTEN            BIT(1) /* Interrupt Enable */
  59
  60 /* MISR1 bits */
  61 #define DP83822_RX_ERR_HF_INT_EN        BIT(0)
  62 #define DP83822_FALSE_CARRIER_HF_INT_EN BIT(1)
  63 #define DP83822_ANEG_COMPLETE_INT_EN    BIT(2)
  64 #define DP83822_DUP_MODE_CHANGE_INT_EN  BIT(3)
  65 #define DP83822_SPEED_CHANGED_INT_EN    BIT(4)
  66 #define DP83822_LINK_STAT_INT_EN        BIT(5)
  67 #define DP83822_ENERGY_DET_INT_EN       BIT(6)
  68 #define DP83822_LINK_QUAL_INT_EN        BIT(7)
  69
  70 /* MISR2 bits */
  71 #define DP83822_JABBER_DET_INT_EN       BIT(0)
  72 #define DP83822_WOL_PKT_INT_EN          BIT(1)
  73 #define DP83822_SLEEP_MODE_INT_EN       BIT(2)
  74 #define DP83822_MDI_XOVER_INT_EN        BIT(3)
  75 #define DP83822_LB_FIFO_INT_EN          BIT(4)
  76 #define DP83822_PAGE_RX_INT_EN          BIT(5)
  77 #define DP83822_ANEG_ERR_INT_EN         BIT(6)
  78 #define DP83822_EEE_ERROR_CHANGE_INT_EN BIT(7)
  79
  80 /* INT_STAT1 bits */
  81 #define DP83822_WOL_INT_EN      BIT(4)
  82 #define DP83822_WOL_INT_STAT    BIT(12)
  83
  84 #define MII_DP83822_RXSOP1      0x04a5
  85 #define MII_DP83822_RXSOP2      0x04a6
  86 #define MII_DP83822_RXSOP3      0x04a7
  87
  88 /* WoL Registers */
  89 #define MII_DP83822_WOL_CFG     0x04a0
  90 #define MII_DP83822_WOL_STAT    0x04a1
  91 #define MII_DP83822_WOL_DA1     0x04a2
  92 #define MII_DP83822_WOL_DA2     0x04a3
  93 #define MII_DP83822_WOL_DA3     0x04a4
  94
  95 /* WoL bits */
  96 #define DP83822_WOL_MAGIC_EN    BIT(0)
  97 #define DP83822_WOL_SECURE_ON   BIT(5)
  98 #define DP83822_WOL_EN          BIT(7)
  99 #define DP83822_WOL_INDICATION_SEL BIT(8)
 100 #define DP83822_WOL_CLR_INDICATION BIT(11)
 101
 102 /* RCSR bits */
 103 #define DP83822_RMII_MODE_EN    BIT(5)
 104 #define DP83822_RMII_MODE_SEL   BIT(7)
 105 #define DP83822_RGMII_MODE_EN   BIT(9)
 106 #define DP83822_RX_CLK_SHIFT    BIT(12)
 107 #define DP83822_TX_CLK_SHIFT    BIT(11)
 108
 109 /* SOR1 mode */
 110 #define DP83822_STRAP_MODE1     0
 111 #define DP83822_STRAP_MODE2     BIT(0)
 112 #define DP83822_STRAP_MODE3     BIT(1)
 113 #define DP83822_STRAP_MODE4     GENMASK(1, 0)
 114
 115 #define DP83822_COL_STRAP_MASK  GENMASK(11, 10)
 116 #define DP83822_COL_SHIFT       10
 117 #define DP83822_RX_ER_STR_MASK  GENMASK(9, 8)
 118 #define DP83822_RX_ER_SHIFT     8
 119
 120 /* DP83826: VOD_CFG1 & VOD_CFG2 */
 121 #define DP83826_VOD_CFG1_MINUS_MDIX_MASK        GENMASK(13, 12)
 122 #define DP83826_VOD_CFG1_MINUS_MDI_MASK         GENMASK(11, 6)
 123 #define DP83826_VOD_CFG2_MINUS_MDIX_MASK        GENMASK(15, 12)
 124 #define DP83826_VOD_CFG2_PLUS_MDIX_MASK         GENMASK(11, 6)
 125 #define DP83826_VOD_CFG2_PLUS_MDI_MASK          GENMASK(5, 0)
 126 #define DP83826_CFG_DAC_MINUS_MDIX_5_TO_4       GENMASK(5, 4)
 127 #define DP83826_CFG_DAC_MINUS_MDIX_3_TO_0       GENMASK(3, 0)
 128 #define DP83826_CFG_DAC_PERCENT_PER_STEP        625
 129 #define DP83826_CFG_DAC_PERCENT_DEFAULT         10000
 130 #define DP83826_CFG_DAC_MINUS_DEFAULT           0x30
 131 #define DP83826_CFG_DAC_PLUS_DEFAULT            0x10
 132
 133 #define MII_DP83822_FIBER_ADVERTISE    (ADVERTISED_TP | ADVERTISED_MII | \
 134                                         ADVERTISED_FIBRE | \
 135                                         ADVERTISED_Pause | ADVERTISED_Asym_Pause)
 136
 137 struct dp83822_private {
 138         bool fx_signal_det_low;
 139         int fx_enabled;
 140         u16 fx_sd_enable;
 141         u8 cfg_dac_minus;
 142         u8 cfg_dac_plus;
 143         struct ethtool_wolinfo wol;
 144 };
 145
 146 static int dp83822_config_wol(struct phy_device *phydev,
 147                               struct ethtool_wolinfo *wol)
 148 {
 149         struct net_device *ndev = phydev->attached_dev;
 150         u16 value;
 151         const u8 *mac;
 152
 153         if (wol->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE)) {
 154                 mac = (const u8 *)ndev->dev_addr;
 155
 156                 if (!is_valid_ether_addr(mac))
 157                         return -EINVAL;
 158
 159                 /* MAC addresses start with byte 5, but stored in mac[0].
 160                  * 822 PHYs store bytes 4|5, 2|3, 0|1
 161                  */
 162                 phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_DA1,
 163                               (mac[1] << 8) | mac[0]);
 164                 phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_DA2,
 165                               (mac[3] << 8) | mac[2]);
 166                 phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_DA3,
 167                               (mac[5] << 8) | mac[4]);
 168
 169                 value = phy_read_mmd(phydev, DP83822_DEVADDR,
 170                                      MII_DP83822_WOL_CFG);
 171                 if (wol->wolopts & WAKE_MAGIC)
 172                         value |= DP83822_WOL_MAGIC_EN;
 173                 else
 174                         value &= ~DP83822_WOL_MAGIC_EN;
 175
 176                 if (wol->wolopts & WAKE_MAGICSECURE) {
 177                         phy_write_mmd(phydev, DP83822_DEVADDR,
 178                                       MII_DP83822_RXSOP1,
 179                                       (wol->sopass[1] << 8) | wol->sopass[0]);
 180                         phy_write_mmd(phydev, DP83822_DEVADDR,
 181                                       MII_DP83822_RXSOP2,
 182                                       (wol->sopass[3] << 8) | wol->sopass[2]);
 183                         phy_write_mmd(phydev, DP83822_DEVADDR,
 184                                       MII_DP83822_RXSOP3,
 185                                       (wol->sopass[5] << 8) | wol->sopass[4]);
 186                         value |= DP83822_WOL_SECURE_ON;
 187                 } else {
 188                         value &= ~DP83822_WOL_SECURE_ON;
 189                 }
 190
 191                 /* Clear any pending WoL interrupt */
 192                 phy_read(phydev, MII_DP83822_MISR2);
 193
 194                 value |= DP83822_WOL_EN | DP83822_WOL_INDICATION_SEL |
 195                          DP83822_WOL_CLR_INDICATION;
 196
 197                 return phy_write_mmd(phydev, DP83822_DEVADDR,
 198                                      MII_DP83822_WOL_CFG, value);
 199         } else {
 200                 return phy_clear_bits_mmd(phydev, DP83822_DEVADDR,
 201                                           MII_DP83822_WOL_CFG,
 202                                           DP83822_WOL_EN |
 203                                           DP83822_WOL_MAGIC_EN |
 204                                           DP83822_WOL_SECURE_ON);
 205         }
 206 }
 207
 208 static int dp83822_set_wol(struct phy_device *phydev,
 209                            struct ethtool_wolinfo *wol)
 210 {
 211         struct dp83822_private *dp83822 = phydev->priv;
 212         int ret;
 213
 214         ret = dp83822_config_wol(phydev, wol);
 215         if (!ret)
 216                 memcpy(&dp83822->wol, wol, sizeof(*wol));
 217         return ret;
 218 }
 219
 220 static void dp83822_get_wol(struct phy_device *phydev,
 221                             struct ethtool_wolinfo *wol)
 222 {
 223         int value;
 224         u16 sopass_val;
 225
 226         wol->supported = (WAKE_MAGIC | WAKE_MAGICSECURE);
 227         wol->wolopts = 0;
 228
 229         value = phy_read_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG);
 230
 231         if (value & DP83822_WOL_MAGIC_EN)
 232                 wol->wolopts |= WAKE_MAGIC;
 233
 234         if (value & DP83822_WOL_SECURE_ON) {
 235                 sopass_val = phy_read_mmd(phydev, DP83822_DEVADDR,
 236                                           MII_DP83822_RXSOP1);
 237                 wol->sopass[0] = (sopass_val & 0xff);
 238                 wol->sopass[1] = (sopass_val >> 8);
 239
 240                 sopass_val = phy_read_mmd(phydev, DP83822_DEVADDR,
 241                                           MII_DP83822_RXSOP2);
 242                 wol->sopass[2] = (sopass_val & 0xff);
 243                 wol->sopass[3] = (sopass_val >> 8);
 244
 245                 sopass_val = phy_read_mmd(phydev, DP83822_DEVADDR,
 246                                           MII_DP83822_RXSOP3);
 247                 wol->sopass[4] = (sopass_val & 0xff);
 248                 wol->sopass[5] = (sopass_val >> 8);
 249
 250                 wol->wolopts |= WAKE_MAGICSECURE;
 251         }
 252
 253         /* WoL is not enabled so set wolopts to 0 */
 254         if (!(value & DP83822_WOL_EN))
 255                 wol->wolopts = 0;
 256 }
 257
 258 static int dp83822_config_intr(struct phy_device *phydev)
 259 {
 260         struct dp83822_private *dp83822 = phydev->priv;
 261         int misr_status;
 262         int physcr_status;
 263         int err;
 264
 265         if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
 266                 misr_status = phy_read(phydev, MII_DP83822_MISR1);
 267                 if (misr_status < 0)
 268                         return misr_status;
 269
 270                 misr_status |= (DP83822_LINK_STAT_INT_EN |
 271                                 DP83822_ENERGY_DET_INT_EN |
 272                                 DP83822_LINK_QUAL_INT_EN);
 273
 274                 if (!dp83822->fx_enabled)
 275                         misr_status |= DP83822_ANEG_COMPLETE_INT_EN |
 276                                        DP83822_DUP_MODE_CHANGE_INT_EN |
 277                                        DP83822_SPEED_CHANGED_INT_EN;
 278
 279
 280                 err = phy_write(phydev, MII_DP83822_MISR1, misr_status);
 281                 if (err < 0)
 282                         return err;
 283
 284                 misr_status = phy_read(phydev, MII_DP83822_MISR2);
 285                 if (misr_status < 0)
 286                         return misr_status;
 287
 288                 misr_status |= (DP83822_JABBER_DET_INT_EN |
 289                                 DP83822_SLEEP_MODE_INT_EN |
 290                                 DP83822_LB_FIFO_INT_EN |
 291                                 DP83822_PAGE_RX_INT_EN |
 292                                 DP83822_EEE_ERROR_CHANGE_INT_EN);
 293
 294                 if (!dp83822->fx_enabled)
 295                         misr_status |= DP83822_ANEG_ERR_INT_EN |
 296                                        DP83822_WOL_PKT_INT_EN;
 297
 298                 err = phy_write(phydev, MII_DP83822_MISR2, misr_status);
 299                 if (err < 0)
 300                         return err;
 301
 302                 physcr_status = phy_read(phydev, MII_DP83822_PHYSCR);
 303                 if (physcr_status < 0)
 304                         return physcr_status;
 305
 306                 physcr_status |= DP83822_PHYSCR_INT_OE | DP83822_PHYSCR_INTEN;
 307
 308         } else {
 309                 err = phy_write(phydev, MII_DP83822_MISR1, 0);
 310                 if (err < 0)
 311                         return err;
 312
 313                 err = phy_write(phydev, MII_DP83822_MISR2, 0);
 314                 if (err < 0)
 315                         return err;
 316
 317                 physcr_status = phy_read(phydev, MII_DP83822_PHYSCR);
 318                 if (physcr_status < 0)
 319                         return physcr_status;
 320
 321                 physcr_status &= ~DP83822_PHYSCR_INTEN;
 322         }
 323
 324         return phy_write(phydev, MII_DP83822_PHYSCR, physcr_status);
 325 }
 326
 327 static irqreturn_t dp83822_handle_interrupt(struct phy_device *phydev)
 328 {
 329         bool trigger_machine = false;
 330         int irq_status;
 331
 332         /* The MISR1 and MISR2 registers are holding the interrupt status in
 333          * the upper half (15:8), while the lower half (7:0) is used for
 334          * controlling the interrupt enable state of those individual interrupt
 335          * sources. To determine the possible interrupt sources, just read the
 336          * MISR* register and use it directly to know which interrupts have
 337          * been enabled previously or not.
 338          */
 339         irq_status = phy_read(phydev, MII_DP83822_MISR1);
 340         if (irq_status < 0) {
 341                 phy_error(phydev);
 342                 return IRQ_NONE;
 343         }
 344         if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
 345                 trigger_machine = true;
 346
 347         irq_status = phy_read(phydev, MII_DP83822_MISR2);
 348         if (irq_status < 0) {
 349                 phy_error(phydev);
 350                 return IRQ_NONE;
 351         }
 352         if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
 353                 trigger_machine = true;
 354
 355         if (!trigger_machine)
 356                 return IRQ_NONE;
 357
 358         phy_trigger_machine(phydev);
 359
 360         return IRQ_HANDLED;
 361 }
 362
 363 static int dp83822_read_status(struct phy_device *phydev)
 364 {
 365         struct dp83822_private *dp83822 = phydev->priv;
 366         int status = phy_read(phydev, MII_DP83822_PHYSTS);
 367         int ctrl2;
 368         int ret;
 369
 370         if (dp83822->fx_enabled) {
 371                 if (status & DP83822_PHYSTS_LINK) {
 372                         phydev->speed = SPEED_UNKNOWN;
 373                         phydev->duplex = DUPLEX_UNKNOWN;
 374                 } else {
 375                         ctrl2 = phy_read(phydev, MII_DP83822_CTRL_2);
 376                         if (ctrl2 < 0)
 377                                 return ctrl2;
 378
 379                         if (!(ctrl2 & DP83822_FX_ENABLE)) {
 380                                 ret = phy_write(phydev, MII_DP83822_CTRL_2,
 381                                                 DP83822_FX_ENABLE | ctrl2);
 382                                 if (ret < 0)
 383                                         return ret;
 384                         }
 385                 }
 386         }
 387
 388         ret = genphy_read_status(phydev);
 389         if (ret)
 390                 return ret;
 391
 392         if (status < 0)
 393                 return status;
 394
 395         if (status & DP83822_PHYSTS_DUPLEX)
 396                 phydev->duplex = DUPLEX_FULL;
 397         else
 398                 phydev->duplex = DUPLEX_HALF;
 399
 400         if (status & DP83822_PHYSTS_10)
 401                 phydev->speed = SPEED_10;
 402         else
 403                 phydev->speed = SPEED_100;
 404
 405         return 0;
 406 }
 407
 408 static int dp83822_config_init(struct phy_device *phydev)
 409 {
 410         struct dp83822_private *dp83822 = phydev->priv;
 411         struct device *dev = &phydev->mdio.dev;
 412         int rgmii_delay = 0;
 413         s32 rx_int_delay;
 414         s32 tx_int_delay;
 415         int err = 0;
 416         int bmcr;
 417
 418         if (phy_interface_is_rgmii(phydev)) {
 419                 rx_int_delay = phy_get_internal_delay(phydev, dev, NULL, 0,
 420                                                       true);
 421
 422                 /* Set DP83822_RX_CLK_SHIFT to enable rx clk internal delay */
 423                 if (rx_int_delay > 0)
 424                         rgmii_delay |= DP83822_RX_CLK_SHIFT;
 425
 426                 tx_int_delay = phy_get_internal_delay(phydev, dev, NULL, 0,
 427                                                       false);
 428
 429                 /* Set DP83822_TX_CLK_SHIFT to disable tx clk internal delay */
 430                 if (tx_int_delay <= 0)
 431                         rgmii_delay |= DP83822_TX_CLK_SHIFT;
 432
 433                 err = phy_modify_mmd(phydev, DP83822_DEVADDR, MII_DP83822_RCSR,
 434                                      DP83822_RX_CLK_SHIFT | DP83822_TX_CLK_SHIFT, rgmii_delay);
 435                 if (err)
 436                         return err;
 437
 438                 err = phy_set_bits_mmd(phydev, DP83822_DEVADDR,
 439                                        MII_DP83822_RCSR, DP83822_RGMII_MODE_EN);
 440
 441                 if (err)
 442                         return err;
 443         } else {
 444                 err = phy_clear_bits_mmd(phydev, DP83822_DEVADDR,
 445                                          MII_DP83822_RCSR, DP83822_RGMII_MODE_EN);
 446
 447                 if (err)
 448                         return err;
 449         }
 450
 451         if (dp83822->fx_enabled) {
 452                 err = phy_modify(phydev, MII_DP83822_CTRL_2,
 453                                  DP83822_FX_ENABLE, 1);
 454                 if (err < 0)
 455                         return err;
 456
 457                 /* Only allow advertising what this PHY supports */
 458                 linkmode_and(phydev->advertising, phydev->advertising,
 459                              phydev->supported);
 460
 461                 linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT,
 462                                  phydev->supported);
 463                 linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT,
 464                                  phydev->advertising);
 465                 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT,
 466                                  phydev->supported);
 467                 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT,
 468                                  phydev->supported);
 469                 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT,
 470                                  phydev->advertising);
 471                 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT,
 472                                  phydev->advertising);
 473
 474                 /* Auto neg is not supported in fiber mode */
 475                 bmcr = phy_read(phydev, MII_BMCR);
 476                 if (bmcr < 0)
 477                         return bmcr;
 478
 479                 if (bmcr & BMCR_ANENABLE) {
 480                         err =  phy_modify(phydev, MII_BMCR, BMCR_ANENABLE, 0);
 481                         if (err < 0)
 482                                 return err;
 483                 }
 484                 phydev->autoneg = AUTONEG_DISABLE;
 485                 linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
 486                                    phydev->supported);
 487                 linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
 488                                    phydev->advertising);
 489
 490                 /* Setup fiber advertisement */
 491                 err = phy_modify_changed(phydev, MII_ADVERTISE,
 492                                          MII_DP83822_FIBER_ADVERTISE,
 493                                          MII_DP83822_FIBER_ADVERTISE);
 494
 495                 if (err < 0)
 496                         return err;
 497
 498                 if (dp83822->fx_signal_det_low) {
 499                         err = phy_set_bits_mmd(phydev, DP83822_DEVADDR,
 500                                                MII_DP83822_GENCFG,
 501                                                DP83822_SIG_DET_LOW);
 502                         if (err)
 503                                 return err;
 504                 }
 505         }
 506         return dp83822_config_wol(phydev, &dp83822->wol);
 507 }
 508
 509 static int dp83826_config_rmii_mode(struct phy_device *phydev)
 510 {
 511         struct device *dev = &phydev->mdio.dev;
 512         const char *of_val;
 513         int ret;
 514
 515         if (!device_property_read_string(dev, "ti,rmii-mode", &of_val)) {
 516                 if (strcmp(of_val, "master") == 0) {
 517                         ret = phy_clear_bits_mmd(phydev, DP83822_DEVADDR, MII_DP83822_RCSR,
 518                                                  DP83822_RMII_MODE_SEL);
 519                 } else if (strcmp(of_val, "slave") == 0) {
 520                         ret = phy_set_bits_mmd(phydev, DP83822_DEVADDR, MII_DP83822_RCSR,
 521                                                DP83822_RMII_MODE_SEL);
 522                 } else {
 523                         phydev_err(phydev, "Invalid value for ti,rmii-mode property (%s)\n",
 524                                    of_val);
 525                         ret = -EINVAL;
 526                 }
 527
 528                 if (ret)
 529                         return ret;
 530         }
 531
 532         return 0;
 533 }
 534
 535 static int dp83826_config_init(struct phy_device *phydev)
 536 {
 537         struct dp83822_private *dp83822 = phydev->priv;
 538         u16 val, mask;
 539         int ret;
 540
 541         if (phydev->interface == PHY_INTERFACE_MODE_RMII) {
 542                 ret = phy_set_bits_mmd(phydev, DP83822_DEVADDR, MII_DP83822_RCSR,
 543                                        DP83822_RMII_MODE_EN);
 544                 if (ret)
 545                         return ret;
 546
 547                 ret = dp83826_config_rmii_mode(phydev);
 548                 if (ret)
 549                         return ret;
 550         } else {
 551                 ret = phy_clear_bits_mmd(phydev, DP83822_DEVADDR, MII_DP83822_RCSR,
 552                                          DP83822_RMII_MODE_EN);
 553                 if (ret)
 554                         return ret;
 555         }
 556
 557         if (dp83822->cfg_dac_minus != DP83826_CFG_DAC_MINUS_DEFAULT) {
 558                 val = FIELD_PREP(DP83826_VOD_CFG1_MINUS_MDI_MASK, dp83822->cfg_dac_minus) |
 559                       FIELD_PREP(DP83826_VOD_CFG1_MINUS_MDIX_MASK,
 560                                  FIELD_GET(DP83826_CFG_DAC_MINUS_MDIX_5_TO_4,
 561                                            dp83822->cfg_dac_minus));
 562                 mask = DP83826_VOD_CFG1_MINUS_MDIX_MASK | DP83826_VOD_CFG1_MINUS_MDI_MASK;
 563                 ret = phy_modify_mmd(phydev, DP83822_DEVADDR, MII_DP83826_VOD_CFG1, mask, val);
 564                 if (ret)
 565                         return ret;
 566
 567                 val = FIELD_PREP(DP83826_VOD_CFG2_MINUS_MDIX_MASK,
 568                                  FIELD_GET(DP83826_CFG_DAC_MINUS_MDIX_3_TO_0,
 569                                            dp83822->cfg_dac_minus));
 570                 mask = DP83826_VOD_CFG2_MINUS_MDIX_MASK;
 571                 ret = phy_modify_mmd(phydev, DP83822_DEVADDR, MII_DP83826_VOD_CFG2, mask, val);
 572                 if (ret)
 573                         return ret;
 574         }
 575
 576         if (dp83822->cfg_dac_plus != DP83826_CFG_DAC_PLUS_DEFAULT) {
 577                 val = FIELD_PREP(DP83826_VOD_CFG2_PLUS_MDIX_MASK, dp83822->cfg_dac_plus) |
 578                       FIELD_PREP(DP83826_VOD_CFG2_PLUS_MDI_MASK, dp83822->cfg_dac_plus);
 579                 mask = DP83826_VOD_CFG2_PLUS_MDIX_MASK | DP83826_VOD_CFG2_PLUS_MDI_MASK;
 580                 ret = phy_modify_mmd(phydev, DP83822_DEVADDR, MII_DP83826_VOD_CFG2, mask, val);
 581                 if (ret)
 582                         return ret;
 583         }
 584
 585         return dp83822_config_wol(phydev, &dp83822->wol);
 586 }
 587
 588 static int dp8382x_config_init(struct phy_device *phydev)
 589 {
 590         struct dp83822_private *dp83822 = phydev->priv;
 591
 592         return dp83822_config_wol(phydev, &dp83822->wol);
 593 }
 594
 595 static int dp83822_phy_reset(struct phy_device *phydev)
 596 {
 597         int err;
 598
 599         err = phy_write(phydev, MII_DP83822_RESET_CTRL, DP83822_SW_RESET);
 600         if (err < 0)
 601                 return err;
 602
 603         return phydev->drv->config_init(phydev);
 604 }
 605
 606 #ifdef CONFIG_OF_MDIO
 607 static int dp83822_of_init(struct phy_device *phydev)
 608 {
 609         struct dp83822_private *dp83822 = phydev->priv;
 610         struct device *dev = &phydev->mdio.dev;
 611
 612         /* Signal detection for the PHY is only enabled if the FX_EN and the
 613          * SD_EN pins are strapped. Signal detection can only enabled if FX_EN
 614          * is strapped otherwise signal detection is disabled for the PHY.
 615          */
 616         if (dp83822->fx_enabled && dp83822->fx_sd_enable)
 617                 dp83822->fx_signal_det_low = device_property_present(dev,
 618                                                                      "ti,link-loss-low");
 619         if (!dp83822->fx_enabled)
 620                 dp83822->fx_enabled = device_property_present(dev,
 621                                                               "ti,fiber-mode");
 622
 623         return 0;
 624 }
 625
 626 static int dp83826_to_dac_minus_one_regval(int percent)
 627 {
 628         int tmp = DP83826_CFG_DAC_PERCENT_DEFAULT - percent;
 629
 630         return tmp / DP83826_CFG_DAC_PERCENT_PER_STEP;
 631 }
 632
 633 static int dp83826_to_dac_plus_one_regval(int percent)
 634 {
 635         int tmp = percent - DP83826_CFG_DAC_PERCENT_DEFAULT;
 636
 637         return tmp / DP83826_CFG_DAC_PERCENT_PER_STEP;
 638 }
 639
 640 static void dp83826_of_init(struct phy_device *phydev)
 641 {
 642         struct dp83822_private *dp83822 = phydev->priv;
 643         struct device *dev = &phydev->mdio.dev;
 644         u32 val;
 645
 646         dp83822->cfg_dac_minus = DP83826_CFG_DAC_MINUS_DEFAULT;
 647         if (!device_property_read_u32(dev, "ti,cfg-dac-minus-one-bp", &val))
 648                 dp83822->cfg_dac_minus += dp83826_to_dac_minus_one_regval(val);
 649
 650         dp83822->cfg_dac_plus = DP83826_CFG_DAC_PLUS_DEFAULT;
 651         if (!device_property_read_u32(dev, "ti,cfg-dac-plus-one-bp", &val))
 652                 dp83822->cfg_dac_plus += dp83826_to_dac_plus_one_regval(val);
 653 }
 654 #else
 655 static int dp83822_of_init(struct phy_device *phydev)
 656 {
 657         return 0;
 658 }
 659
 660 static void dp83826_of_init(struct phy_device *phydev)
 661 {
 662 }
 663 #endif /* CONFIG_OF_MDIO */
 664
 665 static int dp83822_read_straps(struct phy_device *phydev)
 666 {
 667         struct dp83822_private *dp83822 = phydev->priv;
 668         int fx_enabled, fx_sd_enable;
 669         int val;
 670
 671         val = phy_read_mmd(phydev, DP83822_DEVADDR, MII_DP83822_SOR1);
 672         if (val < 0)
 673                 return val;
 674
 675         phydev_dbg(phydev, "SOR1 strap register: 0x%04x\n", val);
 676
 677         fx_enabled = (val & DP83822_COL_STRAP_MASK) >> DP83822_COL_SHIFT;
 678         if (fx_enabled == DP83822_STRAP_MODE2 ||
 679             fx_enabled == DP83822_STRAP_MODE3)
 680                 dp83822->fx_enabled = 1;
 681
 682         if (dp83822->fx_enabled) {
 683                 fx_sd_enable = (val & DP83822_RX_ER_STR_MASK) >> DP83822_RX_ER_SHIFT;
 684                 if (fx_sd_enable == DP83822_STRAP_MODE3 ||
 685                     fx_sd_enable == DP83822_STRAP_MODE4)
 686                         dp83822->fx_sd_enable = 1;
 687         }
 688
 689         return 0;
 690 }
 691
 692 static int dp8382x_probe(struct phy_device *phydev)
 693 {
 694         struct dp83822_private *dp83822;
 695
 696         dp83822 = devm_kzalloc(&phydev->mdio.dev, sizeof(*dp83822),
 697                                GFP_KERNEL);
 698         if (!dp83822)
 699                 return -ENOMEM;
 700
 701         phydev->priv = dp83822;
 702
 703         return 0;
 704 }
 705
 706 static int dp83822_probe(struct phy_device *phydev)
 707 {
 708         struct dp83822_private *dp83822;
 709         int ret;
 710
 711         ret = dp8382x_probe(phydev);
 712         if (ret)
 713                 return ret;
 714
 715         dp83822 = phydev->priv;
 716
 717         ret = dp83822_read_straps(phydev);
 718         if (ret)
 719                 return ret;
 720
 721         dp83822_of_init(phydev);
 722
 723         if (dp83822->fx_enabled)
 724                 phydev->port = PORT_FIBRE;
 725
 726         return 0;
 727 }
 728
 729 static int dp83826_probe(struct phy_device *phydev)
 730 {
 731         int ret;
 732
 733         ret = dp8382x_probe(phydev);
 734         if (ret)
 735                 return ret;
 736
 737         dp83826_of_init(phydev);
 738
 739         return 0;
 740 }
 741
 742 static int dp83822_suspend(struct phy_device *phydev)
 743 {
 744         int value;
 745
 746         value = phy_read_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG);
 747
 748         if (!(value & DP83822_WOL_EN))
 749                 genphy_suspend(phydev);
 750
 751         return 0;
 752 }
 753
 754 static int dp83822_resume(struct phy_device *phydev)
 755 {
 756         int value;
 757
 758         genphy_resume(phydev);
 759
 760         value = phy_read_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG);
 761
 762         phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG, value |
 763                       DP83822_WOL_CLR_INDICATION);
 764
 765         return 0;
 766 }
 767
 768 #define DP83822_PHY_DRIVER(_id, _name)                          \
 769         {                                                       \
 770                 PHY_ID_MATCH_MODEL(_id),                        \
 771                 .name           = (_name),                      \
 772                 /* PHY_BASIC_FEATURES */                        \
 773                 .probe          = dp83822_probe,                \
 774                 .soft_reset     = dp83822_phy_reset,            \
 775                 .config_init    = dp83822_config_init,          \
 776                 .read_status    = dp83822_read_status,          \
 777                 .get_wol = dp83822_get_wol,                     \
 778                 .set_wol = dp83822_set_wol,                     \
 779                 .config_intr = dp83822_config_intr,             \
 780                 .handle_interrupt = dp83822_handle_interrupt,   \
 781                 .suspend = dp83822_suspend,                     \
 782                 .resume = dp83822_resume,                       \
 783         }
 784
 785 #define DP83826_PHY_DRIVER(_id, _name)                          \
 786         {                                                       \
 787                 PHY_ID_MATCH_MODEL(_id),                        \
 788                 .name           = (_name),                      \
 789                 /* PHY_BASIC_FEATURES */                        \
 790                 .probe          = dp83826_probe,                \
 791                 .soft_reset     = dp83822_phy_reset,            \
 792                 .config_init    = dp83826_config_init,          \
 793                 .get_wol = dp83822_get_wol,                     \
 794                 .set_wol = dp83822_set_wol,                     \
 795                 .config_intr = dp83822_config_intr,             \
 796                 .handle_interrupt = dp83822_handle_interrupt,   \
 797                 .suspend = dp83822_suspend,                     \
 798                 .resume = dp83822_resume,                       \
 799         }
 800
 801 #define DP8382X_PHY_DRIVER(_id, _name)                          \
 802         {                                                       \
 803                 PHY_ID_MATCH_MODEL(_id),                        \
 804                 .name           = (_name),                      \
 805                 /* PHY_BASIC_FEATURES */                        \
 806                 .probe          = dp8382x_probe,                \
 807                 .soft_reset     = dp83822_phy_reset,            \
 808                 .config_init    = dp8382x_config_init,          \
 809                 .get_wol = dp83822_get_wol,                     \
 810                 .set_wol = dp83822_set_wol,                     \
 811                 .config_intr = dp83822_config_intr,             \
 812                 .handle_interrupt = dp83822_handle_interrupt,   \
 813                 .suspend = dp83822_suspend,                     \
 814                 .resume = dp83822_resume,                       \
 815         }
 816
 817 static struct phy_driver dp83822_driver[] = {
 818         DP83822_PHY_DRIVER(DP83822_PHY_ID, "TI DP83822"),
 819         DP8382X_PHY_DRIVER(DP83825I_PHY_ID, "TI DP83825I"),
 820         DP83826_PHY_DRIVER(DP83826C_PHY_ID, "TI DP83826C"),
 821         DP83826_PHY_DRIVER(DP83826NC_PHY_ID, "TI DP83826NC"),
 822         DP8382X_PHY_DRIVER(DP83825S_PHY_ID, "TI DP83825S"),
 823         DP8382X_PHY_DRIVER(DP83825CM_PHY_ID, "TI DP83825M"),
 824         DP8382X_PHY_DRIVER(DP83825CS_PHY_ID, "TI DP83825CS"),
 825 };
 826 module_phy_driver(dp83822_driver);
 827
 828 static struct mdio_device_id __maybe_unused dp83822_tbl[] = {
 829         { DP83822_PHY_ID, 0xfffffff0 },
 830         { DP83825I_PHY_ID, 0xfffffff0 },
 831         { DP83826C_PHY_ID, 0xfffffff0 },
 832         { DP83826NC_PHY_ID, 0xfffffff0 },
 833         { DP83825S_PHY_ID, 0xfffffff0 },
 834         { DP83825CM_PHY_ID, 0xfffffff0 },
 835         { DP83825CS_PHY_ID, 0xfffffff0 },
 836         { },
 837 };
 838 MODULE_DEVICE_TABLE(mdio, dp83822_tbl);
 839
 840 MODULE_DESCRIPTION("Texas Instruments DP83822 PHY driver");
 841 MODULE_AUTHOR("Dan Murphy <[email protected]");
 842 MODULE_LICENSE("GPL v2");