1 // SPDX-License-Identifier: GPL-2.0 2 /* NXP TJA1100 BroadRReach PHY driver 3 * 4 * Copyright (C) 2018 Marek Vasut <marex@denx.de> 5 */ 6 #include <linux/delay.h> 7 #include <linux/ethtool.h> 8 #include <linux/ethtool_netlink.h> 9 #include <linux/kernel.h> 10 #include <linux/mdio.h> 11 #include <linux/mii.h> 12 #include <linux/module.h> 13 #include <linux/of.h> 14 #include <linux/phy.h> 15 #include <linux/hwmon.h> 16 #include <linux/bitfield.h> 17 #include <linux/of_mdio.h> 18 #include <linux/of_irq.h> 19 20 #define PHY_ID_MASK 0xfffffff0 21 #define PHY_ID_TJA1100 0x0180dc40 22 #define PHY_ID_TJA1101 0x0180dd00 23 #define PHY_ID_TJA1102 0x0180dc80 24 #define PHY_ID_TJA1102S 0x0180dc90 25 26 #define MII_ECTRL 17 27 #define MII_ECTRL_LINK_CONTROL BIT(15) 28 #define MII_ECTRL_POWER_MODE_MASK GENMASK(14, 11) 29 #define MII_ECTRL_POWER_MODE_NO_CHANGE (0x0 << 11) 30 #define MII_ECTRL_POWER_MODE_NORMAL (0x3 << 11) 31 #define MII_ECTRL_POWER_MODE_SLEEP (0xa << 11) 32 #define MII_ECTRL_POWER_MODE_STANDBY (0xc << 11) 33 #define MII_ECTRL_CABLE_TEST BIT(5) 34 #define MII_ECTRL_CONFIG_EN BIT(2) 35 #define MII_ECTRL_WAKE_REQUEST BIT(0) 36 37 #define MII_CFG1 18 38 #define MII_CFG1_MASTER_SLAVE BIT(15) 39 #define MII_CFG1_AUTO_OP BIT(14) 40 #define MII_CFG1_INTERFACE_MODE_MASK GENMASK(9, 8) 41 #define MII_CFG1_MII_MODE (0x0 << 8) 42 #define MII_CFG1_RMII_MODE_REFCLK_IN BIT(8) 43 #define MII_CFG1_RMII_MODE_REFCLK_OUT BIT(9) 44 #define MII_CFG1_REVMII_MODE GENMASK(9, 8) 45 #define MII_CFG1_SLEEP_CONFIRM BIT(6) 46 #define MII_CFG1_LED_MODE_MASK GENMASK(5, 4) 47 #define MII_CFG1_LED_MODE_LINKUP 0 48 #define MII_CFG1_LED_ENABLE BIT(3) 49 50 #define MII_CFG2 19 51 #define MII_CFG2_SLEEP_REQUEST_TO GENMASK(1, 0) 52 #define MII_CFG2_SLEEP_REQUEST_TO_16MS 0x3 53 54 #define MII_INTSRC 21 55 #define MII_INTSRC_LINK_FAIL BIT(10) 56 #define MII_INTSRC_LINK_UP BIT(9) 57 #define MII_INTSRC_MASK (MII_INTSRC_LINK_FAIL | MII_INTSRC_LINK_UP) 58 #define MII_INTSRC_UV_ERR BIT(3) 59 #define MII_INTSRC_TEMP_ERR BIT(1) 60 61 #define MII_INTEN 22 62 #define MII_INTEN_LINK_FAIL BIT(10) 63 #define MII_INTEN_LINK_UP BIT(9) 64 #define MII_INTEN_UV_ERR BIT(3) 65 #define MII_INTEN_TEMP_ERR BIT(1) 66 67 #define MII_COMMSTAT 23 68 #define MII_COMMSTAT_LINK_UP BIT(15) 69 #define MII_COMMSTAT_SQI_STATE GENMASK(7, 5) 70 #define MII_COMMSTAT_SQI_MAX 7 71 72 #define MII_GENSTAT 24 73 #define MII_GENSTAT_PLL_LOCKED BIT(14) 74 75 #define MII_EXTSTAT 25 76 #define MII_EXTSTAT_SHORT_DETECT BIT(8) 77 #define MII_EXTSTAT_OPEN_DETECT BIT(7) 78 #define MII_EXTSTAT_POLARITY_DETECT BIT(6) 79 80 #define MII_COMMCFG 27 81 #define MII_COMMCFG_AUTO_OP BIT(15) 82 83 #define MII_CFG3 28 84 #define MII_CFG3_PHY_EN BIT(0) 85 86 /* Configure REF_CLK as input in RMII mode */ 87 #define TJA110X_RMII_MODE_REFCLK_IN BIT(0) 88 89 struct tja11xx_priv { 90 struct phy_device *phydev; 91 struct work_struct phy_register_work; 92 u32 flags; 93 }; 94 95 struct tja11xx_phy_stats { 96 const char *string; 97 u8 reg; 98 u8 off; 99 u16 mask; 100 }; 101 102 static struct tja11xx_phy_stats tja11xx_hw_stats[] = { 103 { "phy_symbol_error_count", 20, 0, GENMASK(15, 0) }, 104 { "phy_polarity_detect", 25, 6, BIT(6) }, 105 { "phy_open_detect", 25, 7, BIT(7) }, 106 { "phy_short_detect", 25, 8, BIT(8) }, 107 { "phy_rem_rcvr_count", 26, 0, GENMASK(7, 0) }, 108 { "phy_loc_rcvr_count", 26, 8, GENMASK(15, 8) }, 109 }; 110 111 static int tja11xx_check(struct phy_device *phydev, u8 reg, u16 mask, u16 set) 112 { 113 int val; 114 115 return phy_read_poll_timeout(phydev, reg, val, (val & mask) == set, 116 150, 30000, false); 117 } 118 119 static int phy_modify_check(struct phy_device *phydev, u8 reg, 120 u16 mask, u16 set) 121 { 122 int ret; 123 124 ret = phy_modify(phydev, reg, mask, set); 125 if (ret) 126 return ret; 127 128 return tja11xx_check(phydev, reg, mask, set); 129 } 130 131 static int tja11xx_enable_reg_write(struct phy_device *phydev) 132 { 133 return phy_set_bits(phydev, MII_ECTRL, MII_ECTRL_CONFIG_EN); 134 } 135 136 static int tja11xx_enable_link_control(struct phy_device *phydev) 137 { 138 return phy_set_bits(phydev, MII_ECTRL, MII_ECTRL_LINK_CONTROL); 139 } 140 141 static int tja11xx_disable_link_control(struct phy_device *phydev) 142 { 143 return phy_clear_bits(phydev, MII_ECTRL, MII_ECTRL_LINK_CONTROL); 144 } 145 146 static int tja11xx_wakeup(struct phy_device *phydev) 147 { 148 int ret; 149 150 ret = phy_read(phydev, MII_ECTRL); 151 if (ret < 0) 152 return ret; 153 154 switch (ret & MII_ECTRL_POWER_MODE_MASK) { 155 case MII_ECTRL_POWER_MODE_NO_CHANGE: 156 break; 157 case MII_ECTRL_POWER_MODE_NORMAL: 158 ret = phy_set_bits(phydev, MII_ECTRL, MII_ECTRL_WAKE_REQUEST); 159 if (ret) 160 return ret; 161 162 ret = phy_clear_bits(phydev, MII_ECTRL, MII_ECTRL_WAKE_REQUEST); 163 if (ret) 164 return ret; 165 break; 166 case MII_ECTRL_POWER_MODE_STANDBY: 167 ret = phy_modify_check(phydev, MII_ECTRL, 168 MII_ECTRL_POWER_MODE_MASK, 169 MII_ECTRL_POWER_MODE_STANDBY); 170 if (ret) 171 return ret; 172 173 ret = phy_modify(phydev, MII_ECTRL, MII_ECTRL_POWER_MODE_MASK, 174 MII_ECTRL_POWER_MODE_NORMAL); 175 if (ret) 176 return ret; 177 178 ret = phy_modify_check(phydev, MII_GENSTAT, 179 MII_GENSTAT_PLL_LOCKED, 180 MII_GENSTAT_PLL_LOCKED); 181 if (ret) 182 return ret; 183 184 return tja11xx_enable_link_control(phydev); 185 case MII_ECTRL_POWER_MODE_SLEEP: 186 switch (phydev->phy_id & PHY_ID_MASK) { 187 case PHY_ID_TJA1102S: 188 /* Enable PHY, maybe it is disabled due to pin strapping */ 189 return phy_set_bits(phydev, MII_CFG3, MII_CFG3_PHY_EN); 190 default: 191 return 0; 192 } 193 default: 194 break; 195 } 196 197 return 0; 198 } 199 200 static int tja11xx_soft_reset(struct phy_device *phydev) 201 { 202 int ret; 203 204 ret = tja11xx_enable_reg_write(phydev); 205 if (ret) 206 return ret; 207 208 return genphy_soft_reset(phydev); 209 } 210 211 static int tja11xx_config_aneg_cable_test(struct phy_device *phydev) 212 { 213 bool finished = false; 214 int ret; 215 216 if (phydev->link) 217 return 0; 218 219 if (!phydev->drv->cable_test_start || 220 !phydev->drv->cable_test_get_status) 221 return 0; 222 223 ret = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF); 224 if (ret) 225 return ret; 226 227 ret = phydev->drv->cable_test_start(phydev); 228 if (ret) 229 return ret; 230 231 /* According to the documentation this test takes 100 usec */ 232 usleep_range(100, 200); 233 234 ret = phydev->drv->cable_test_get_status(phydev, &finished); 235 if (ret) 236 return ret; 237 238 if (finished) 239 ethnl_cable_test_finished(phydev); 240 241 return 0; 242 } 243 244 static int tja11xx_config_aneg(struct phy_device *phydev) 245 { 246 int ret, changed = 0; 247 u16 ctl = 0; 248 249 switch (phydev->master_slave_set) { 250 case MASTER_SLAVE_CFG_MASTER_FORCE: 251 ctl |= MII_CFG1_MASTER_SLAVE; 252 break; 253 case MASTER_SLAVE_CFG_SLAVE_FORCE: 254 break; 255 case MASTER_SLAVE_CFG_UNKNOWN: 256 case MASTER_SLAVE_CFG_UNSUPPORTED: 257 goto do_test; 258 default: 259 phydev_warn(phydev, "Unsupported Master/Slave mode\n"); 260 return -ENOTSUPP; 261 } 262 263 changed = phy_modify_changed(phydev, MII_CFG1, MII_CFG1_MASTER_SLAVE, ctl); 264 if (changed < 0) 265 return changed; 266 267 do_test: 268 ret = tja11xx_config_aneg_cable_test(phydev); 269 if (ret) 270 return ret; 271 272 return __genphy_config_aneg(phydev, changed); 273 } 274 275 static int tja11xx_get_interface_mode(struct phy_device *phydev) 276 { 277 struct tja11xx_priv *priv = phydev->priv; 278 int mii_mode; 279 280 switch (phydev->interface) { 281 case PHY_INTERFACE_MODE_MII: 282 mii_mode = MII_CFG1_MII_MODE; 283 break; 284 case PHY_INTERFACE_MODE_REVMII: 285 mii_mode = MII_CFG1_REVMII_MODE; 286 break; 287 case PHY_INTERFACE_MODE_RMII: 288 if (priv->flags & TJA110X_RMII_MODE_REFCLK_IN) 289 mii_mode = MII_CFG1_RMII_MODE_REFCLK_IN; 290 else 291 mii_mode = MII_CFG1_RMII_MODE_REFCLK_OUT; 292 break; 293 default: 294 return -EINVAL; 295 } 296 297 return mii_mode; 298 } 299 300 static int tja11xx_config_init(struct phy_device *phydev) 301 { 302 u16 reg_mask, reg_val; 303 int ret; 304 305 ret = tja11xx_enable_reg_write(phydev); 306 if (ret) 307 return ret; 308 309 phydev->autoneg = AUTONEG_DISABLE; 310 phydev->speed = SPEED_100; 311 phydev->duplex = DUPLEX_FULL; 312 313 switch (phydev->phy_id & PHY_ID_MASK) { 314 case PHY_ID_TJA1100: 315 reg_mask = MII_CFG1_AUTO_OP | MII_CFG1_LED_MODE_MASK | 316 MII_CFG1_LED_ENABLE; 317 reg_val = MII_CFG1_AUTO_OP | MII_CFG1_LED_MODE_LINKUP | 318 MII_CFG1_LED_ENABLE; 319 320 reg_mask |= MII_CFG1_INTERFACE_MODE_MASK; 321 ret = tja11xx_get_interface_mode(phydev); 322 if (ret < 0) 323 return ret; 324 325 reg_val |= (ret & 0xffff); 326 ret = phy_modify(phydev, MII_CFG1, reg_mask, reg_val); 327 if (ret) 328 return ret; 329 break; 330 case PHY_ID_TJA1102S: 331 case PHY_ID_TJA1101: 332 reg_mask = MII_CFG1_INTERFACE_MODE_MASK; 333 ret = tja11xx_get_interface_mode(phydev); 334 if (ret < 0) 335 return ret; 336 337 reg_val = ret & 0xffff; 338 ret = phy_modify(phydev, MII_CFG1, reg_mask, reg_val); 339 if (ret) 340 return ret; 341 fallthrough; 342 case PHY_ID_TJA1102: 343 ret = phy_set_bits(phydev, MII_COMMCFG, MII_COMMCFG_AUTO_OP); 344 if (ret) 345 return ret; 346 break; 347 default: 348 return -EINVAL; 349 } 350 351 ret = phy_clear_bits(phydev, MII_CFG1, MII_CFG1_SLEEP_CONFIRM); 352 if (ret) 353 return ret; 354 355 ret = phy_modify(phydev, MII_CFG2, MII_CFG2_SLEEP_REQUEST_TO, 356 MII_CFG2_SLEEP_REQUEST_TO_16MS); 357 if (ret) 358 return ret; 359 360 ret = tja11xx_wakeup(phydev); 361 if (ret < 0) 362 return ret; 363 364 /* ACK interrupts by reading the status register */ 365 ret = phy_read(phydev, MII_INTSRC); 366 if (ret < 0) 367 return ret; 368 369 return 0; 370 } 371 372 static int tja11xx_read_status(struct phy_device *phydev) 373 { 374 int ret; 375 376 phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN; 377 phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED; 378 379 ret = genphy_update_link(phydev); 380 if (ret) 381 return ret; 382 383 ret = phy_read(phydev, MII_CFG1); 384 if (ret < 0) 385 return ret; 386 387 if (ret & MII_CFG1_MASTER_SLAVE) 388 phydev->master_slave_get = MASTER_SLAVE_CFG_MASTER_FORCE; 389 else 390 phydev->master_slave_get = MASTER_SLAVE_CFG_SLAVE_FORCE; 391 392 if (phydev->link) { 393 ret = phy_read(phydev, MII_COMMSTAT); 394 if (ret < 0) 395 return ret; 396 397 if (!(ret & MII_COMMSTAT_LINK_UP)) 398 phydev->link = 0; 399 } 400 401 return 0; 402 } 403 404 static int tja11xx_get_sqi(struct phy_device *phydev) 405 { 406 int ret; 407 408 ret = phy_read(phydev, MII_COMMSTAT); 409 if (ret < 0) 410 return ret; 411 412 return FIELD_GET(MII_COMMSTAT_SQI_STATE, ret); 413 } 414 415 static int tja11xx_get_sqi_max(struct phy_device *phydev) 416 { 417 return MII_COMMSTAT_SQI_MAX; 418 } 419 420 static int tja11xx_get_sset_count(struct phy_device *phydev) 421 { 422 return ARRAY_SIZE(tja11xx_hw_stats); 423 } 424 425 static void tja11xx_get_strings(struct phy_device *phydev, u8 *data) 426 { 427 int i; 428 429 for (i = 0; i < ARRAY_SIZE(tja11xx_hw_stats); i++) 430 ethtool_puts(&data, tja11xx_hw_stats[i].string); 431 } 432 433 static void tja11xx_get_stats(struct phy_device *phydev, 434 struct ethtool_stats *stats, u64 *data) 435 { 436 int i, ret; 437 438 for (i = 0; i < ARRAY_SIZE(tja11xx_hw_stats); i++) { 439 ret = phy_read(phydev, tja11xx_hw_stats[i].reg); 440 if (ret < 0) 441 data[i] = U64_MAX; 442 else { 443 data[i] = ret & tja11xx_hw_stats[i].mask; 444 data[i] >>= tja11xx_hw_stats[i].off; 445 } 446 } 447 } 448 449 static int tja11xx_hwmon_read(struct device *dev, 450 enum hwmon_sensor_types type, 451 u32 attr, int channel, long *value) 452 { 453 struct phy_device *phydev = dev_get_drvdata(dev); 454 int ret; 455 456 if (type == hwmon_in && attr == hwmon_in_lcrit_alarm) { 457 ret = phy_read(phydev, MII_INTSRC); 458 if (ret < 0) 459 return ret; 460 461 *value = !!(ret & MII_INTSRC_TEMP_ERR); 462 return 0; 463 } 464 465 if (type == hwmon_temp && attr == hwmon_temp_crit_alarm) { 466 ret = phy_read(phydev, MII_INTSRC); 467 if (ret < 0) 468 return ret; 469 470 *value = !!(ret & MII_INTSRC_UV_ERR); 471 return 0; 472 } 473 474 return -EOPNOTSUPP; 475 } 476 477 static umode_t tja11xx_hwmon_is_visible(const void *data, 478 enum hwmon_sensor_types type, 479 u32 attr, int channel) 480 { 481 if (type == hwmon_in && attr == hwmon_in_lcrit_alarm) 482 return 0444; 483 484 if (type == hwmon_temp && attr == hwmon_temp_crit_alarm) 485 return 0444; 486 487 return 0; 488 } 489 490 static const struct hwmon_channel_info * const tja11xx_hwmon_info[] = { 491 HWMON_CHANNEL_INFO(in, HWMON_I_LCRIT_ALARM), 492 HWMON_CHANNEL_INFO(temp, HWMON_T_CRIT_ALARM), 493 NULL 494 }; 495 496 static const struct hwmon_ops tja11xx_hwmon_hwmon_ops = { 497 .is_visible = tja11xx_hwmon_is_visible, 498 .read = tja11xx_hwmon_read, 499 }; 500 501 static const struct hwmon_chip_info tja11xx_hwmon_chip_info = { 502 .ops = &tja11xx_hwmon_hwmon_ops, 503 .info = tja11xx_hwmon_info, 504 }; 505 506 static int tja11xx_hwmon_register(struct phy_device *phydev, 507 struct tja11xx_priv *priv) 508 { 509 struct device *hdev, *dev = &phydev->mdio.dev; 510 511 hdev = devm_hwmon_device_register_with_info(dev, NULL, phydev, 512 &tja11xx_hwmon_chip_info, 513 NULL); 514 return PTR_ERR_OR_ZERO(hdev); 515 } 516 517 static int tja11xx_parse_dt(struct phy_device *phydev) 518 { 519 struct device_node *node = phydev->mdio.dev.of_node; 520 struct tja11xx_priv *priv = phydev->priv; 521 522 if (!IS_ENABLED(CONFIG_OF_MDIO)) 523 return 0; 524 525 if (of_property_read_bool(node, "nxp,rmii-refclk-in")) 526 priv->flags |= TJA110X_RMII_MODE_REFCLK_IN; 527 528 return 0; 529 } 530 531 static int tja11xx_probe(struct phy_device *phydev) 532 { 533 struct device *dev = &phydev->mdio.dev; 534 struct tja11xx_priv *priv; 535 int ret; 536 537 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 538 if (!priv) 539 return -ENOMEM; 540 541 priv->phydev = phydev; 542 phydev->priv = priv; 543 544 ret = tja11xx_parse_dt(phydev); 545 if (ret) 546 return ret; 547 548 return tja11xx_hwmon_register(phydev, priv); 549 } 550 551 static void tja1102_p1_register(struct work_struct *work) 552 { 553 struct tja11xx_priv *priv = container_of(work, struct tja11xx_priv, 554 phy_register_work); 555 struct phy_device *phydev_phy0 = priv->phydev; 556 struct mii_bus *bus = phydev_phy0->mdio.bus; 557 struct device *dev = &phydev_phy0->mdio.dev; 558 struct device_node *np = dev->of_node; 559 struct device_node *child; 560 int ret; 561 562 for_each_available_child_of_node(np, child) { 563 struct phy_device *phy; 564 int addr; 565 566 addr = of_mdio_parse_addr(dev, child); 567 if (addr < 0) { 568 dev_err(dev, "Can't parse addr\n"); 569 continue; 570 } else if (addr != phydev_phy0->mdio.addr + 1) { 571 /* Currently we care only about double PHY chip TJA1102. 572 * If some day NXP will decide to bring chips with more 573 * PHYs, this logic should be reworked. 574 */ 575 dev_err(dev, "Unexpected address. Should be: %i\n", 576 phydev_phy0->mdio.addr + 1); 577 continue; 578 } 579 580 if (mdiobus_is_registered_device(bus, addr)) { 581 dev_err(dev, "device is already registered\n"); 582 continue; 583 } 584 585 /* Real PHY ID of Port 1 is 0 */ 586 phy = phy_device_create(bus, addr, PHY_ID_TJA1102, false, NULL); 587 if (IS_ERR(phy)) { 588 dev_err(dev, "Can't create PHY device for Port 1: %i\n", 589 addr); 590 continue; 591 } 592 593 /* Overwrite parent device. phy_device_create() set parent to 594 * the mii_bus->dev, which is not correct in case. 595 */ 596 phy->mdio.dev.parent = dev; 597 598 ret = of_mdiobus_phy_device_register(bus, phy, child, addr); 599 if (ret) { 600 /* All resources needed for Port 1 should be already 601 * available for Port 0. Both ports use the same 602 * interrupt line, so -EPROBE_DEFER would make no sense 603 * here. 604 */ 605 dev_err(dev, "Can't register Port 1. Unexpected error: %i\n", 606 ret); 607 phy_device_free(phy); 608 } 609 } 610 } 611 612 static int tja1102_p0_probe(struct phy_device *phydev) 613 { 614 struct device *dev = &phydev->mdio.dev; 615 struct tja11xx_priv *priv; 616 int ret; 617 618 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 619 if (!priv) 620 return -ENOMEM; 621 622 priv->phydev = phydev; 623 INIT_WORK(&priv->phy_register_work, tja1102_p1_register); 624 625 ret = tja11xx_hwmon_register(phydev, priv); 626 if (ret) 627 return ret; 628 629 schedule_work(&priv->phy_register_work); 630 631 return 0; 632 } 633 634 static int tja1102_match_phy_device(struct phy_device *phydev, bool port0) 635 { 636 int ret; 637 638 if ((phydev->phy_id & PHY_ID_MASK) != PHY_ID_TJA1102) 639 return 0; 640 641 ret = phy_read(phydev, MII_PHYSID2); 642 if (ret < 0) 643 return ret; 644 645 /* TJA1102 Port 1 has phyid 0 and doesn't support temperature 646 * and undervoltage alarms. 647 */ 648 if (port0) 649 return ret ? 1 : 0; 650 651 return !ret; 652 } 653 654 static int tja1102_p0_match_phy_device(struct phy_device *phydev, 655 const struct phy_driver *phydrv) 656 { 657 return tja1102_match_phy_device(phydev, true); 658 } 659 660 static int tja1102_p1_match_phy_device(struct phy_device *phydev, 661 const struct phy_driver *phydrv) 662 { 663 return tja1102_match_phy_device(phydev, false); 664 } 665 666 static int tja11xx_ack_interrupt(struct phy_device *phydev) 667 { 668 int ret; 669 670 ret = phy_read(phydev, MII_INTSRC); 671 672 return (ret < 0) ? ret : 0; 673 } 674 675 static int tja11xx_config_intr(struct phy_device *phydev) 676 { 677 int value = 0; 678 int err; 679 680 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { 681 err = tja11xx_ack_interrupt(phydev); 682 if (err) 683 return err; 684 685 value = MII_INTEN_LINK_FAIL | MII_INTEN_LINK_UP | 686 MII_INTEN_UV_ERR | MII_INTEN_TEMP_ERR; 687 err = phy_write(phydev, MII_INTEN, value); 688 } else { 689 err = phy_write(phydev, MII_INTEN, value); 690 if (err) 691 return err; 692 693 err = tja11xx_ack_interrupt(phydev); 694 } 695 696 return err; 697 } 698 699 static irqreturn_t tja11xx_handle_interrupt(struct phy_device *phydev) 700 { 701 struct device *dev = &phydev->mdio.dev; 702 int irq_status; 703 704 irq_status = phy_read(phydev, MII_INTSRC); 705 if (irq_status < 0) { 706 phy_error(phydev); 707 return IRQ_NONE; 708 } 709 710 if (irq_status & MII_INTSRC_TEMP_ERR) 711 dev_warn(dev, "Overtemperature error detected (temp > 155C°).\n"); 712 if (irq_status & MII_INTSRC_UV_ERR) 713 dev_warn(dev, "Undervoltage error detected.\n"); 714 715 if (!(irq_status & MII_INTSRC_MASK)) 716 return IRQ_NONE; 717 718 phy_trigger_machine(phydev); 719 720 return IRQ_HANDLED; 721 } 722 723 static int tja11xx_cable_test_start(struct phy_device *phydev) 724 { 725 int ret; 726 727 ret = phy_clear_bits(phydev, MII_COMMCFG, MII_COMMCFG_AUTO_OP); 728 if (ret) 729 return ret; 730 731 ret = tja11xx_wakeup(phydev); 732 if (ret < 0) 733 return ret; 734 735 ret = tja11xx_disable_link_control(phydev); 736 if (ret < 0) 737 return ret; 738 739 return phy_set_bits(phydev, MII_ECTRL, MII_ECTRL_CABLE_TEST); 740 } 741 742 /* 743 * | BI_DA+ | BI_DA- | Result 744 * | open | open | open 745 * | + short to - | - short to + | short 746 * | short to Vdd | open | open 747 * | open | shot to Vdd | open 748 * | short to Vdd | short to Vdd | short 749 * | shot to GND | open | open 750 * | open | shot to GND | open 751 * | short to GND | shot to GND | short 752 * | connected to active link partner (master) | shot and open 753 */ 754 static int tja11xx_cable_test_report_trans(u32 result) 755 { 756 u32 mask = MII_EXTSTAT_SHORT_DETECT | MII_EXTSTAT_OPEN_DETECT; 757 758 if ((result & mask) == mask) { 759 /* connected to active link partner (master) */ 760 return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC; 761 } else if ((result & mask) == 0) { 762 return ETHTOOL_A_CABLE_RESULT_CODE_OK; 763 } else if (result & MII_EXTSTAT_SHORT_DETECT) { 764 return ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT; 765 } else if (result & MII_EXTSTAT_OPEN_DETECT) { 766 return ETHTOOL_A_CABLE_RESULT_CODE_OPEN; 767 } else { 768 return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC; 769 } 770 } 771 772 static int tja11xx_cable_test_report(struct phy_device *phydev) 773 { 774 int ret; 775 776 ret = phy_read(phydev, MII_EXTSTAT); 777 if (ret < 0) 778 return ret; 779 780 ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A, 781 tja11xx_cable_test_report_trans(ret)); 782 783 return 0; 784 } 785 786 static int tja11xx_cable_test_get_status(struct phy_device *phydev, 787 bool *finished) 788 { 789 int ret; 790 791 *finished = false; 792 793 ret = phy_read(phydev, MII_ECTRL); 794 if (ret < 0) 795 return ret; 796 797 if (!(ret & MII_ECTRL_CABLE_TEST)) { 798 *finished = true; 799 800 ret = phy_set_bits(phydev, MII_COMMCFG, MII_COMMCFG_AUTO_OP); 801 if (ret) 802 return ret; 803 804 return tja11xx_cable_test_report(phydev); 805 } 806 807 return 0; 808 } 809 810 static struct phy_driver tja11xx_driver[] = { 811 { 812 PHY_ID_MATCH_MODEL(PHY_ID_TJA1100), 813 .name = "NXP TJA1100", 814 .features = PHY_BASIC_T1_FEATURES, 815 .probe = tja11xx_probe, 816 .soft_reset = tja11xx_soft_reset, 817 .config_aneg = tja11xx_config_aneg, 818 .config_init = tja11xx_config_init, 819 .read_status = tja11xx_read_status, 820 .get_sqi = tja11xx_get_sqi, 821 .get_sqi_max = tja11xx_get_sqi_max, 822 .suspend = genphy_suspend, 823 .resume = genphy_resume, 824 .set_loopback = genphy_loopback, 825 /* Statistics */ 826 .get_sset_count = tja11xx_get_sset_count, 827 .get_strings = tja11xx_get_strings, 828 .get_stats = tja11xx_get_stats, 829 }, { 830 PHY_ID_MATCH_MODEL(PHY_ID_TJA1101), 831 .name = "NXP TJA1101", 832 .features = PHY_BASIC_T1_FEATURES, 833 .probe = tja11xx_probe, 834 .soft_reset = tja11xx_soft_reset, 835 .config_aneg = tja11xx_config_aneg, 836 .config_init = tja11xx_config_init, 837 .read_status = tja11xx_read_status, 838 .get_sqi = tja11xx_get_sqi, 839 .get_sqi_max = tja11xx_get_sqi_max, 840 .suspend = genphy_suspend, 841 .resume = genphy_resume, 842 .set_loopback = genphy_loopback, 843 /* Statistics */ 844 .get_sset_count = tja11xx_get_sset_count, 845 .get_strings = tja11xx_get_strings, 846 .get_stats = tja11xx_get_stats, 847 }, { 848 .name = "NXP TJA1102 Port 0", 849 .features = PHY_BASIC_T1_FEATURES, 850 .flags = PHY_POLL_CABLE_TEST, 851 .probe = tja1102_p0_probe, 852 .soft_reset = tja11xx_soft_reset, 853 .config_aneg = tja11xx_config_aneg, 854 .config_init = tja11xx_config_init, 855 .read_status = tja11xx_read_status, 856 .get_sqi = tja11xx_get_sqi, 857 .get_sqi_max = tja11xx_get_sqi_max, 858 .match_phy_device = tja1102_p0_match_phy_device, 859 .suspend = genphy_suspend, 860 .resume = genphy_resume, 861 .set_loopback = genphy_loopback, 862 /* Statistics */ 863 .get_sset_count = tja11xx_get_sset_count, 864 .get_strings = tja11xx_get_strings, 865 .get_stats = tja11xx_get_stats, 866 .config_intr = tja11xx_config_intr, 867 .handle_interrupt = tja11xx_handle_interrupt, 868 .cable_test_start = tja11xx_cable_test_start, 869 .cable_test_get_status = tja11xx_cable_test_get_status, 870 }, { 871 .name = "NXP TJA1102 Port 1", 872 .features = PHY_BASIC_T1_FEATURES, 873 .flags = PHY_POLL_CABLE_TEST, 874 /* currently no probe for Port 1 is need */ 875 .soft_reset = tja11xx_soft_reset, 876 .config_aneg = tja11xx_config_aneg, 877 .config_init = tja11xx_config_init, 878 .read_status = tja11xx_read_status, 879 .get_sqi = tja11xx_get_sqi, 880 .get_sqi_max = tja11xx_get_sqi_max, 881 .match_phy_device = tja1102_p1_match_phy_device, 882 .suspend = genphy_suspend, 883 .resume = genphy_resume, 884 .set_loopback = genphy_loopback, 885 /* Statistics */ 886 .get_sset_count = tja11xx_get_sset_count, 887 .get_strings = tja11xx_get_strings, 888 .get_stats = tja11xx_get_stats, 889 .config_intr = tja11xx_config_intr, 890 .handle_interrupt = tja11xx_handle_interrupt, 891 .cable_test_start = tja11xx_cable_test_start, 892 .cable_test_get_status = tja11xx_cable_test_get_status, 893 }, { 894 PHY_ID_MATCH_MODEL(PHY_ID_TJA1102S), 895 .name = "NXP TJA1102S", 896 .features = PHY_BASIC_T1_FEATURES, 897 .flags = PHY_POLL_CABLE_TEST, 898 .probe = tja11xx_probe, 899 .soft_reset = tja11xx_soft_reset, 900 .config_aneg = tja11xx_config_aneg, 901 .config_init = tja11xx_config_init, 902 .read_status = tja11xx_read_status, 903 .get_sqi = tja11xx_get_sqi, 904 .get_sqi_max = tja11xx_get_sqi_max, 905 .suspend = genphy_suspend, 906 .resume = genphy_resume, 907 .set_loopback = genphy_loopback, 908 /* Statistics */ 909 .get_sset_count = tja11xx_get_sset_count, 910 .get_strings = tja11xx_get_strings, 911 .get_stats = tja11xx_get_stats, 912 .config_intr = tja11xx_config_intr, 913 .handle_interrupt = tja11xx_handle_interrupt, 914 .cable_test_start = tja11xx_cable_test_start, 915 .cable_test_get_status = tja11xx_cable_test_get_status, 916 } 917 }; 918 919 module_phy_driver(tja11xx_driver); 920 921 static const struct mdio_device_id __maybe_unused tja11xx_tbl[] = { 922 { PHY_ID_MATCH_MODEL(PHY_ID_TJA1100) }, 923 { PHY_ID_MATCH_MODEL(PHY_ID_TJA1101) }, 924 { PHY_ID_MATCH_MODEL(PHY_ID_TJA1102) }, 925 { PHY_ID_MATCH_MODEL(PHY_ID_TJA1102S) }, 926 { } 927 }; 928 929 MODULE_DEVICE_TABLE(mdio, tja11xx_tbl); 930 931 MODULE_AUTHOR("Marek Vasut <marex@denx.de>"); 932 MODULE_DESCRIPTION("NXP TJA11xx BoardR-Reach PHY driver"); 933 MODULE_LICENSE("GPL"); 934