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"); 912