1 // SPDX-License-Identifier: GPL-2.0+ 2 /* Framework for finding and configuring PHYs. 3 * Also contains generic PHY driver 4 * 5 * Author: Andy Fleming 6 * 7 * Copyright (c) 2004 Freescale Semiconductor, Inc. 8 */ 9 10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 11 12 #include <linux/acpi.h> 13 #include <linux/bitmap.h> 14 #include <linux/delay.h> 15 #include <linux/errno.h> 16 #include <linux/etherdevice.h> 17 #include <linux/ethtool.h> 18 #include <linux/init.h> 19 #include <linux/interrupt.h> 20 #include <linux/io.h> 21 #include <linux/kernel.h> 22 #include <linux/list.h> 23 #include <linux/mdio.h> 24 #include <linux/mii.h> 25 #include <linux/mm.h> 26 #include <linux/module.h> 27 #include <linux/of.h> 28 #include <linux/netdevice.h> 29 #include <linux/phy.h> 30 #include <linux/phylib_stubs.h> 31 #include <linux/phy_led_triggers.h> 32 #include <linux/phy_link_topology.h> 33 #include <linux/phy_port.h> 34 #include <linux/pse-pd/pse.h> 35 #include <linux/property.h> 36 #include <linux/ptp_clock_kernel.h> 37 #include <linux/rtnetlink.h> 38 #include <linux/sfp.h> 39 #include <linux/skbuff.h> 40 #include <linux/slab.h> 41 #include <linux/string.h> 42 #include <linux/uaccess.h> 43 #include <linux/unistd.h> 44 45 #include "phylib-internal.h" 46 #include "phy-caps.h" 47 48 MODULE_DESCRIPTION("PHY library"); 49 MODULE_AUTHOR("Andy Fleming"); 50 MODULE_LICENSE("GPL"); 51 52 static struct phy_driver genphy_c45_driver = { 53 .phy_id = 0xffffffff, 54 .phy_id_mask = 0xffffffff, 55 .name = "Generic Clause 45 PHY", 56 .read_status = genphy_c45_read_status, 57 }; 58 59 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_features) __ro_after_init; 60 EXPORT_SYMBOL_GPL(phy_basic_features); 61 62 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1_features) __ro_after_init; 63 EXPORT_SYMBOL_GPL(phy_basic_t1_features); 64 65 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1s_p2mp_features) __ro_after_init; 66 EXPORT_SYMBOL_GPL(phy_basic_t1s_p2mp_features); 67 68 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_features) __ro_after_init; 69 EXPORT_SYMBOL_GPL(phy_gbit_features); 70 71 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_fibre_features) __ro_after_init; 72 EXPORT_SYMBOL_GPL(phy_gbit_fibre_features); 73 74 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_features) __ro_after_init; 75 EXPORT_SYMBOL_GPL(phy_10gbit_features); 76 77 const int phy_basic_ports_array[3] = { 78 ETHTOOL_LINK_MODE_Autoneg_BIT, 79 ETHTOOL_LINK_MODE_TP_BIT, 80 ETHTOOL_LINK_MODE_MII_BIT, 81 }; 82 EXPORT_SYMBOL_GPL(phy_basic_ports_array); 83 84 static const int phy_all_ports_features_array[7] __initconst = { 85 ETHTOOL_LINK_MODE_Autoneg_BIT, 86 ETHTOOL_LINK_MODE_TP_BIT, 87 ETHTOOL_LINK_MODE_MII_BIT, 88 ETHTOOL_LINK_MODE_FIBRE_BIT, 89 ETHTOOL_LINK_MODE_AUI_BIT, 90 ETHTOOL_LINK_MODE_BNC_BIT, 91 ETHTOOL_LINK_MODE_Backplane_BIT, 92 }; 93 94 static const int phy_10_100_features_array[4] __initconst = { 95 ETHTOOL_LINK_MODE_10baseT_Half_BIT, 96 ETHTOOL_LINK_MODE_10baseT_Full_BIT, 97 ETHTOOL_LINK_MODE_100baseT_Half_BIT, 98 ETHTOOL_LINK_MODE_100baseT_Full_BIT, 99 }; 100 101 static const int phy_basic_t1_features_array[3] __initconst = { 102 ETHTOOL_LINK_MODE_TP_BIT, 103 ETHTOOL_LINK_MODE_10baseT1L_Full_BIT, 104 ETHTOOL_LINK_MODE_100baseT1_Full_BIT, 105 }; 106 107 static const int phy_basic_t1s_p2mp_features_array[2] __initconst = { 108 ETHTOOL_LINK_MODE_TP_BIT, 109 ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT, 110 }; 111 112 static const int phy_gbit_features_array[2] __initconst = { 113 ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 114 ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 115 }; 116 117 static const int phy_eee_cap1_features_array[] __initconst = { 118 ETHTOOL_LINK_MODE_100baseT_Full_BIT, 119 ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 120 ETHTOOL_LINK_MODE_10000baseT_Full_BIT, 121 ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, 122 ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, 123 ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, 124 }; 125 126 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_eee_cap1_features) __ro_after_init; 127 EXPORT_SYMBOL_GPL(phy_eee_cap1_features); 128 129 static const int phy_eee_cap2_features_array[] __initconst = { 130 ETHTOOL_LINK_MODE_2500baseT_Full_BIT, 131 ETHTOOL_LINK_MODE_5000baseT_Full_BIT, 132 }; 133 134 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_eee_cap2_features) __ro_after_init; 135 EXPORT_SYMBOL_GPL(phy_eee_cap2_features); 136 137 static void __init features_init(void) 138 { 139 /* 10/100 half/full*/ 140 linkmode_set_bit_array(phy_basic_ports_array, 141 ARRAY_SIZE(phy_basic_ports_array), 142 phy_basic_features); 143 linkmode_set_bit_array(phy_10_100_features_array, 144 ARRAY_SIZE(phy_10_100_features_array), 145 phy_basic_features); 146 147 /* 100 full, TP */ 148 linkmode_set_bit_array(phy_basic_t1_features_array, 149 ARRAY_SIZE(phy_basic_t1_features_array), 150 phy_basic_t1_features); 151 152 /* 10 half, P2MP, TP */ 153 linkmode_set_bit_array(phy_basic_t1s_p2mp_features_array, 154 ARRAY_SIZE(phy_basic_t1s_p2mp_features_array), 155 phy_basic_t1s_p2mp_features); 156 157 /* 10/100 half/full + 1000 half/full */ 158 linkmode_set_bit_array(phy_basic_ports_array, 159 ARRAY_SIZE(phy_basic_ports_array), 160 phy_gbit_features); 161 linkmode_set_bit_array(phy_10_100_features_array, 162 ARRAY_SIZE(phy_10_100_features_array), 163 phy_gbit_features); 164 linkmode_set_bit_array(phy_gbit_features_array, 165 ARRAY_SIZE(phy_gbit_features_array), 166 phy_gbit_features); 167 168 /* 10/100 half/full + 1000 half/full + fibre*/ 169 linkmode_set_bit_array(phy_basic_ports_array, 170 ARRAY_SIZE(phy_basic_ports_array), 171 phy_gbit_fibre_features); 172 linkmode_set_bit_array(phy_10_100_features_array, 173 ARRAY_SIZE(phy_10_100_features_array), 174 phy_gbit_fibre_features); 175 linkmode_set_bit_array(phy_gbit_features_array, 176 ARRAY_SIZE(phy_gbit_features_array), 177 phy_gbit_fibre_features); 178 linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phy_gbit_fibre_features); 179 180 /* 10/100 half/full + 1000 half/full + 10G full*/ 181 linkmode_set_bit_array(phy_all_ports_features_array, 182 ARRAY_SIZE(phy_all_ports_features_array), 183 phy_10gbit_features); 184 linkmode_set_bit_array(phy_10_100_features_array, 185 ARRAY_SIZE(phy_10_100_features_array), 186 phy_10gbit_features); 187 linkmode_set_bit_array(phy_gbit_features_array, 188 ARRAY_SIZE(phy_gbit_features_array), 189 phy_10gbit_features); 190 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, 191 phy_10gbit_features); 192 193 linkmode_set_bit_array(phy_eee_cap1_features_array, 194 ARRAY_SIZE(phy_eee_cap1_features_array), 195 phy_eee_cap1_features); 196 linkmode_set_bit_array(phy_eee_cap2_features_array, 197 ARRAY_SIZE(phy_eee_cap2_features_array), 198 phy_eee_cap2_features); 199 200 } 201 202 void phy_device_free(struct phy_device *phydev) 203 { 204 put_device(&phydev->mdio.dev); 205 } 206 EXPORT_SYMBOL(phy_device_free); 207 208 static void phy_mdio_device_free(struct mdio_device *mdiodev) 209 { 210 struct phy_device *phydev; 211 212 phydev = container_of(mdiodev, struct phy_device, mdio); 213 phy_device_free(phydev); 214 } 215 216 static void phy_device_release(struct device *dev) 217 { 218 fwnode_handle_put(dev->fwnode); 219 kfree(to_phy_device(dev)); 220 } 221 222 static void phy_mdio_device_remove(struct mdio_device *mdiodev) 223 { 224 struct phy_device *phydev; 225 226 phydev = container_of(mdiodev, struct phy_device, mdio); 227 phy_device_remove(phydev); 228 } 229 230 static struct phy_driver genphy_driver; 231 232 static bool phy_drv_wol_enabled(struct phy_device *phydev) 233 { 234 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; 235 236 phy_ethtool_get_wol(phydev, &wol); 237 238 return wol.wolopts != 0; 239 } 240 241 bool phy_may_wakeup(struct phy_device *phydev) 242 { 243 /* If the PHY is using driver-model based wakeup, use that state. */ 244 if (phy_can_wakeup(phydev)) 245 return device_may_wakeup(&phydev->mdio.dev); 246 247 return phy_drv_wol_enabled(phydev); 248 } 249 EXPORT_SYMBOL_GPL(phy_may_wakeup); 250 251 static void phy_link_change(struct phy_device *phydev, bool up) 252 { 253 struct net_device *netdev = phydev->attached_dev; 254 255 if (up) 256 netif_carrier_on(netdev); 257 else 258 netif_carrier_off(netdev); 259 phydev->adjust_link(netdev); 260 if (phydev->mii_ts && phydev->mii_ts->link_state) 261 phydev->mii_ts->link_state(phydev->mii_ts, phydev); 262 } 263 264 /** 265 * phy_uses_state_machine - test whether consumer driver uses PAL state machine 266 * @phydev: the target PHY device structure 267 * 268 * Ultimately, this aims to indirectly determine whether the PHY is attached 269 * to a consumer which uses the state machine by calling phy_start() and 270 * phy_stop(). 271 * 272 * When the PHY driver consumer uses phylib, it must have previously called 273 * phy_connect_direct() or one of its derivatives, so that phy_prepare_link() 274 * has set up a hook for monitoring state changes. 275 * 276 * When the PHY driver is used by the MAC driver consumer through phylink (the 277 * only other provider of a phy_link_change() method), using the PHY state 278 * machine is not optional. 279 * 280 * Return: true if consumer calls phy_start() and phy_stop(), false otherwise. 281 */ 282 static bool phy_uses_state_machine(struct phy_device *phydev) 283 { 284 if (phydev->phy_link_change == phy_link_change) 285 return phydev->attached_dev && phydev->adjust_link; 286 287 return !!phydev->phy_link_change; 288 } 289 290 static bool mdio_bus_phy_may_suspend(struct phy_device *phydev) 291 { 292 struct device_driver *drv = phydev->mdio.dev.driver; 293 struct phy_driver *phydrv = to_phy_driver(drv); 294 struct net_device *netdev = phydev->attached_dev; 295 296 if (!drv || !phydrv->suspend) 297 return false; 298 299 /* If the PHY on the mido bus is not attached but has WOL enabled 300 * we cannot suspend the PHY. 301 */ 302 if (!netdev && phy_may_wakeup(phydev)) 303 return false; 304 305 /* PHY not attached? May suspend if the PHY has not already been 306 * suspended as part of a prior call to phy_disconnect() -> 307 * phy_detach() -> phy_suspend() because the parent netdev might be the 308 * MDIO bus driver and clock gated at this point. 309 */ 310 if (!netdev) 311 goto out; 312 313 if (netdev->ethtool->wol_enabled) 314 return false; 315 316 /* As long as not all affected network drivers support the 317 * wol_enabled flag, let's check for hints that WoL is enabled. 318 * Don't suspend PHY if the attached netdev parent may wake up. 319 * The parent may point to a PCI device, as in tg3 driver. 320 */ 321 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent)) 322 return false; 323 324 /* Also don't suspend PHY if the netdev itself may wakeup. This 325 * is the case for devices w/o underlaying pwr. mgmt. aware bus, 326 * e.g. SoC devices. 327 */ 328 if (device_may_wakeup(&netdev->dev)) 329 return false; 330 331 out: 332 return !phydev->suspended; 333 } 334 335 static __maybe_unused int mdio_bus_phy_suspend(struct device *dev) 336 { 337 struct phy_device *phydev = to_phy_device(dev); 338 339 if (phydev->mac_managed_pm) 340 return 0; 341 342 /* Wakeup interrupts may occur during the system sleep transition when 343 * the PHY is inaccessible. Set flag to postpone handling until the PHY 344 * has resumed. Wait for concurrent interrupt handler to complete. 345 */ 346 if (phy_interrupt_is_valid(phydev)) { 347 phydev->irq_suspended = 1; 348 synchronize_irq(phydev->irq); 349 } 350 351 /* We must stop the state machine manually, otherwise it stops out of 352 * control, possibly with the phydev->lock held. Upon resume, netdev 353 * may call phy routines that try to grab the same lock, and that may 354 * lead to a deadlock. 355 */ 356 if (phy_uses_state_machine(phydev)) 357 phy_stop_machine(phydev); 358 359 if (!mdio_bus_phy_may_suspend(phydev)) 360 return 0; 361 362 phydev->suspended_by_mdio_bus = 1; 363 364 return phy_suspend(phydev); 365 } 366 367 static __maybe_unused int mdio_bus_phy_resume(struct device *dev) 368 { 369 struct phy_device *phydev = to_phy_device(dev); 370 int ret; 371 372 if (phydev->mac_managed_pm) 373 return 0; 374 375 if (!phydev->suspended_by_mdio_bus) 376 goto no_resume; 377 378 phydev->suspended_by_mdio_bus = 0; 379 380 /* If we managed to get here with the PHY state machine in a state 381 * neither PHY_HALTED, PHY_READY nor PHY_UP, this is an indication 382 * that something went wrong and we should most likely be using 383 * MAC managed PM, but we are not. 384 */ 385 WARN_ON(phydev->state != PHY_HALTED && phydev->state != PHY_READY && 386 phydev->state != PHY_UP); 387 388 ret = phy_init_hw(phydev); 389 if (ret < 0) 390 return ret; 391 392 ret = phy_resume(phydev); 393 if (ret < 0) 394 return ret; 395 no_resume: 396 if (phy_interrupt_is_valid(phydev)) { 397 phydev->irq_suspended = 0; 398 synchronize_irq(phydev->irq); 399 400 /* Rerun interrupts which were postponed by phy_interrupt() 401 * because they occurred during the system sleep transition. 402 */ 403 if (phydev->irq_rerun) { 404 phydev->irq_rerun = 0; 405 enable_irq(phydev->irq); 406 irq_wake_thread(phydev->irq, phydev); 407 } 408 } 409 410 if (phy_uses_state_machine(phydev)) 411 phy_start_machine(phydev); 412 413 return 0; 414 } 415 416 static SIMPLE_DEV_PM_OPS(mdio_bus_phy_pm_ops, mdio_bus_phy_suspend, 417 mdio_bus_phy_resume); 418 419 /** 420 * genphy_match_phy_device - match a PHY device with a PHY driver 421 * @phydev: target phy_device struct 422 * @phydrv: target phy_driver struct 423 * 424 * Description: Checks whether the given PHY device matches the specified 425 * PHY driver. For Clause 45 PHYs, iterates over the available device 426 * identifiers and compares them against the driver's expected PHY ID, 427 * applying the provided mask. For Clause 22 PHYs, a direct ID comparison 428 * is performed. 429 * 430 * Return: 1 if the PHY device matches the driver, 0 otherwise. 431 */ 432 int genphy_match_phy_device(struct phy_device *phydev, 433 const struct phy_driver *phydrv) 434 { 435 if (phydev->is_c45) { 436 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids); 437 int i; 438 439 for (i = 1; i < num_ids; i++) { 440 if (phydev->c45_ids.device_ids[i] == 0xffffffff) 441 continue; 442 443 if (phy_id_compare(phydev->c45_ids.device_ids[i], 444 phydrv->phy_id, phydrv->phy_id_mask)) 445 return 1; 446 } 447 448 return 0; 449 } 450 451 return phy_id_compare(phydev->phy_id, phydrv->phy_id, 452 phydrv->phy_id_mask); 453 } 454 EXPORT_SYMBOL_GPL(genphy_match_phy_device); 455 456 static int phy_bus_match(struct device *dev, const struct device_driver *drv) 457 { 458 struct phy_device *phydev = to_phy_device(dev); 459 const struct phy_driver *phydrv = to_phy_driver(drv); 460 461 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY)) 462 return 0; 463 464 if (phydrv->match_phy_device) 465 return phydrv->match_phy_device(phydev, phydrv); 466 467 return genphy_match_phy_device(phydev, phydrv); 468 } 469 470 static ssize_t 471 phy_id_show(struct device *dev, struct device_attribute *attr, char *buf) 472 { 473 struct phy_device *phydev = to_phy_device(dev); 474 475 return sysfs_emit(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id); 476 } 477 static DEVICE_ATTR_RO(phy_id); 478 479 static ssize_t 480 phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf) 481 { 482 struct phy_device *phydev = to_phy_device(dev); 483 const char *mode = NULL; 484 485 if (phydev->is_internal) 486 mode = "internal"; 487 else 488 mode = phy_modes(phydev->interface); 489 490 return sysfs_emit(buf, "%s\n", mode); 491 } 492 static DEVICE_ATTR_RO(phy_interface); 493 494 static ssize_t 495 phy_has_fixups_show(struct device *dev, struct device_attribute *attr, 496 char *buf) 497 { 498 struct phy_device *phydev = to_phy_device(dev); 499 500 return sysfs_emit(buf, "%d\n", phydev->has_fixups); 501 } 502 static DEVICE_ATTR_RO(phy_has_fixups); 503 504 static ssize_t phy_dev_flags_show(struct device *dev, 505 struct device_attribute *attr, 506 char *buf) 507 { 508 struct phy_device *phydev = to_phy_device(dev); 509 510 return sysfs_emit(buf, "0x%08x\n", phydev->dev_flags); 511 } 512 static DEVICE_ATTR_RO(phy_dev_flags); 513 514 static struct attribute *phy_dev_attrs[] = { 515 &dev_attr_phy_id.attr, 516 &dev_attr_phy_interface.attr, 517 &dev_attr_phy_has_fixups.attr, 518 &dev_attr_phy_dev_flags.attr, 519 NULL, 520 }; 521 522 static const struct attribute_group phy_dev_group = { 523 .attrs = phy_dev_attrs, 524 }; 525 526 #define MMD_DEVICE_ID_ATTR(n) \ 527 static ssize_t mmd##n##_device_id_show(struct device *dev, \ 528 struct device_attribute *attr, char *buf) \ 529 { \ 530 struct phy_device *phydev = to_phy_device(dev); \ 531 return sysfs_emit(buf, "0x%.8lx\n", \ 532 (unsigned long)phydev->c45_ids.device_ids[n]); \ 533 } \ 534 static DEVICE_ATTR_RO(mmd##n##_device_id) 535 536 MMD_DEVICE_ID_ATTR(1); 537 MMD_DEVICE_ID_ATTR(2); 538 MMD_DEVICE_ID_ATTR(3); 539 MMD_DEVICE_ID_ATTR(4); 540 MMD_DEVICE_ID_ATTR(5); 541 MMD_DEVICE_ID_ATTR(6); 542 MMD_DEVICE_ID_ATTR(7); 543 MMD_DEVICE_ID_ATTR(8); 544 MMD_DEVICE_ID_ATTR(9); 545 MMD_DEVICE_ID_ATTR(10); 546 MMD_DEVICE_ID_ATTR(11); 547 MMD_DEVICE_ID_ATTR(12); 548 MMD_DEVICE_ID_ATTR(13); 549 MMD_DEVICE_ID_ATTR(14); 550 MMD_DEVICE_ID_ATTR(15); 551 MMD_DEVICE_ID_ATTR(16); 552 MMD_DEVICE_ID_ATTR(17); 553 MMD_DEVICE_ID_ATTR(18); 554 MMD_DEVICE_ID_ATTR(19); 555 MMD_DEVICE_ID_ATTR(20); 556 MMD_DEVICE_ID_ATTR(21); 557 MMD_DEVICE_ID_ATTR(22); 558 MMD_DEVICE_ID_ATTR(23); 559 MMD_DEVICE_ID_ATTR(24); 560 MMD_DEVICE_ID_ATTR(25); 561 MMD_DEVICE_ID_ATTR(26); 562 MMD_DEVICE_ID_ATTR(27); 563 MMD_DEVICE_ID_ATTR(28); 564 MMD_DEVICE_ID_ATTR(29); 565 MMD_DEVICE_ID_ATTR(30); 566 MMD_DEVICE_ID_ATTR(31); 567 568 static struct attribute *phy_mmd_attrs[] = { 569 &dev_attr_mmd1_device_id.attr, 570 &dev_attr_mmd2_device_id.attr, 571 &dev_attr_mmd3_device_id.attr, 572 &dev_attr_mmd4_device_id.attr, 573 &dev_attr_mmd5_device_id.attr, 574 &dev_attr_mmd6_device_id.attr, 575 &dev_attr_mmd7_device_id.attr, 576 &dev_attr_mmd8_device_id.attr, 577 &dev_attr_mmd9_device_id.attr, 578 &dev_attr_mmd10_device_id.attr, 579 &dev_attr_mmd11_device_id.attr, 580 &dev_attr_mmd12_device_id.attr, 581 &dev_attr_mmd13_device_id.attr, 582 &dev_attr_mmd14_device_id.attr, 583 &dev_attr_mmd15_device_id.attr, 584 &dev_attr_mmd16_device_id.attr, 585 &dev_attr_mmd17_device_id.attr, 586 &dev_attr_mmd18_device_id.attr, 587 &dev_attr_mmd19_device_id.attr, 588 &dev_attr_mmd20_device_id.attr, 589 &dev_attr_mmd21_device_id.attr, 590 &dev_attr_mmd22_device_id.attr, 591 &dev_attr_mmd23_device_id.attr, 592 &dev_attr_mmd24_device_id.attr, 593 &dev_attr_mmd25_device_id.attr, 594 &dev_attr_mmd26_device_id.attr, 595 &dev_attr_mmd27_device_id.attr, 596 &dev_attr_mmd28_device_id.attr, 597 &dev_attr_mmd29_device_id.attr, 598 &dev_attr_mmd30_device_id.attr, 599 &dev_attr_mmd31_device_id.attr, 600 NULL 601 }; 602 603 static umode_t phy_mmd_is_visible(struct kobject *kobj, 604 struct attribute *attr, int index) 605 { 606 struct device *dev = kobj_to_dev(kobj); 607 struct phy_device *phydev = to_phy_device(dev); 608 const int i = index + 1; 609 610 if (!phydev->is_c45) 611 return 0; 612 if (i >= ARRAY_SIZE(phydev->c45_ids.device_ids) || 613 phydev->c45_ids.device_ids[i] == 0xffffffff) 614 return 0; 615 616 return attr->mode; 617 } 618 619 static const struct attribute_group phy_mmd_group = { 620 .name = "c45_phy_ids", 621 .attrs = phy_mmd_attrs, 622 .is_visible = phy_mmd_is_visible, 623 }; 624 625 static const struct attribute_group *phy_device_groups[] = { 626 &phy_dev_group, 627 &phy_mmd_group, 628 NULL, 629 }; 630 631 static const struct device_type mdio_bus_phy_type = { 632 .name = "PHY", 633 .groups = phy_device_groups, 634 .release = phy_device_release, 635 .pm = pm_ptr(&mdio_bus_phy_pm_ops), 636 }; 637 638 static int phy_request_driver_module(struct phy_device *dev, u32 phy_id) 639 { 640 int ret; 641 642 ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, 643 MDIO_ID_ARGS(phy_id)); 644 /* We only check for failures in executing the usermode binary, 645 * not whether a PHY driver module exists for the PHY ID. 646 * Accept -ENOENT because this may occur in case no initramfs exists, 647 * then modprobe isn't available. 648 */ 649 if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) { 650 phydev_err(dev, "error %d loading PHY driver module for ID 0x%08lx\n", 651 ret, (unsigned long)phy_id); 652 return ret; 653 } 654 655 return 0; 656 } 657 658 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id, 659 bool is_c45, 660 struct phy_c45_device_ids *c45_ids) 661 { 662 struct phy_device *dev; 663 struct mdio_device *mdiodev; 664 int ret = 0; 665 666 /* We allocate the device, and initialize the default values */ 667 dev = kzalloc_obj(*dev); 668 if (!dev) 669 return ERR_PTR(-ENOMEM); 670 671 mdiodev = &dev->mdio; 672 mdiodev->dev.parent = &bus->dev; 673 mdiodev->dev.bus = &mdio_bus_type; 674 mdiodev->dev.type = &mdio_bus_phy_type; 675 mdiodev->bus = bus; 676 mdiodev->bus_match = phy_bus_match; 677 mdiodev->addr = addr; 678 mdiodev->flags = MDIO_DEVICE_FLAG_PHY; 679 mdiodev->device_free = phy_mdio_device_free; 680 mdiodev->device_remove = phy_mdio_device_remove; 681 mdiodev->reset_state = -1; 682 683 dev->speed = SPEED_UNKNOWN; 684 dev->duplex = DUPLEX_UNKNOWN; 685 dev->pause = false; 686 dev->asym_pause = false; 687 dev->link = 0; 688 dev->port = PORT_TP; 689 dev->interface = PHY_INTERFACE_MODE_GMII; 690 691 dev->autoneg = AUTONEG_ENABLE; 692 693 dev->pma_extable = -ENODATA; 694 dev->is_c45 = is_c45; 695 dev->phy_id = phy_id; 696 if (c45_ids) 697 dev->c45_ids = *c45_ids; 698 dev->irq = bus->irq[addr]; 699 700 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr); 701 device_initialize(&mdiodev->dev); 702 703 dev->state = PHY_DOWN; 704 INIT_LIST_HEAD(&dev->leds); 705 INIT_LIST_HEAD(&dev->ports); 706 707 /* The driver's probe function must change that to the real number 708 * of ports possible on the PHY. We assume by default we are dealing 709 * with a single-port PHY 710 */ 711 dev->max_n_ports = 1; 712 713 mutex_init(&dev->lock); 714 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); 715 716 /* Request the appropriate module unconditionally; don't 717 * bother trying to do so only if it isn't already loaded, 718 * because that gets complicated. A hotplug event would have 719 * done an unconditional modprobe anyway. 720 * We don't do normal hotplug because it won't work for MDIO 721 * -- because it relies on the device staying around for long 722 * enough for the driver to get loaded. With MDIO, the NIC 723 * driver will get bored and give up as soon as it finds that 724 * there's no driver _already_ loaded. 725 */ 726 if (is_c45 && c45_ids) { 727 const int num_ids = ARRAY_SIZE(c45_ids->device_ids); 728 int i; 729 730 for (i = 1; i < num_ids; i++) { 731 if (c45_ids->device_ids[i] == 0xffffffff) 732 continue; 733 734 ret = phy_request_driver_module(dev, 735 c45_ids->device_ids[i]); 736 if (ret) 737 break; 738 } 739 } else { 740 ret = phy_request_driver_module(dev, phy_id); 741 } 742 743 if (ret) { 744 put_device(&mdiodev->dev); 745 dev = ERR_PTR(ret); 746 } 747 748 return dev; 749 } 750 EXPORT_SYMBOL(phy_device_create); 751 752 /* phy_c45_probe_present - checks to see if a MMD is present in the package 753 * @bus: the target MII bus 754 * @prtad: PHY package address on the MII bus 755 * @devad: PHY device (MMD) address 756 * 757 * Read the MDIO_STAT2 register, and check whether a device is responding 758 * at this address. 759 * 760 * Returns: negative error number on bus access error, zero if no device 761 * is responding, or positive if a device is present. 762 */ 763 static int phy_c45_probe_present(struct mii_bus *bus, int prtad, int devad) 764 { 765 int stat2; 766 767 stat2 = mdiobus_c45_read(bus, prtad, devad, MDIO_STAT2); 768 if (stat2 < 0) 769 return stat2; 770 771 return (stat2 & MDIO_STAT2_DEVPRST) == MDIO_STAT2_DEVPRST_VAL; 772 } 773 774 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers. 775 * @bus: the target MII bus 776 * @addr: PHY address on the MII bus 777 * @dev_addr: MMD address in the PHY. 778 * @devices_in_package: where to store the devices in package information. 779 * 780 * Description: reads devices in package registers of a MMD at @dev_addr 781 * from PHY at @addr on @bus. 782 * 783 * Returns: 0 on success, -EIO on failure. 784 */ 785 static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr, 786 u32 *devices_in_package) 787 { 788 int phy_reg; 789 790 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS2); 791 if (phy_reg < 0) 792 return -EIO; 793 *devices_in_package = phy_reg << 16; 794 795 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS1); 796 if (phy_reg < 0) 797 return -EIO; 798 *devices_in_package |= phy_reg; 799 800 return 0; 801 } 802 803 /** 804 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. 805 * @bus: the target MII bus 806 * @addr: PHY address on the MII bus 807 * @c45_ids: where to store the c45 ID information. 808 * 809 * Read the PHY "devices in package". If this appears to be valid, read 810 * the PHY identifiers for each device. Return the "devices in package" 811 * and identifiers in @c45_ids. 812 * 813 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if 814 * the "devices in package" is invalid or no device responds. 815 */ 816 static int get_phy_c45_ids(struct mii_bus *bus, int addr, 817 struct phy_c45_device_ids *c45_ids) 818 { 819 const int num_ids = ARRAY_SIZE(c45_ids->device_ids); 820 u32 devs_in_pkg = 0; 821 int i, ret, phy_reg; 822 823 /* Find first non-zero Devices In package. Device zero is reserved 824 * for 802.3 c45 complied PHYs, so don't probe it at first. 825 */ 826 for (i = 1; i < MDIO_MMD_NUM && (devs_in_pkg == 0 || 827 (devs_in_pkg & 0x1fffffff) == 0x1fffffff); i++) { 828 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) { 829 /* Check that there is a device present at this 830 * address before reading the devices-in-package 831 * register to avoid reading garbage from the PHY. 832 * Some PHYs (88x3310) vendor space is not IEEE802.3 833 * compliant. 834 */ 835 ret = phy_c45_probe_present(bus, addr, i); 836 if (ret < 0) 837 /* returning -ENODEV doesn't stop bus 838 * scanning 839 */ 840 return (ret == -EIO || 841 ret == -ENODEV) ? -ENODEV : -EIO; 842 843 if (!ret) 844 continue; 845 } 846 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, &devs_in_pkg); 847 if (phy_reg < 0) 848 return -EIO; 849 } 850 851 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) { 852 /* If mostly Fs, there is no device there, then let's probe 853 * MMD 0, as some 10G PHYs have zero Devices In package, 854 * e.g. Cortina CS4315/CS4340 PHY. 855 */ 856 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, &devs_in_pkg); 857 if (phy_reg < 0) 858 return -EIO; 859 860 /* no device there, let's get out of here */ 861 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) 862 return -ENODEV; 863 } 864 865 /* Now probe Device Identifiers for each device present. */ 866 for (i = 1; i < num_ids; i++) { 867 if (!(devs_in_pkg & (1 << i))) 868 continue; 869 870 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) { 871 /* Probe the "Device Present" bits for the vendor MMDs 872 * to ignore these if they do not contain IEEE 802.3 873 * registers. 874 */ 875 ret = phy_c45_probe_present(bus, addr, i); 876 if (ret < 0) 877 return ret; 878 879 if (!ret) 880 continue; 881 } 882 883 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID1); 884 if (phy_reg < 0) 885 return -EIO; 886 c45_ids->device_ids[i] = phy_reg << 16; 887 888 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID2); 889 if (phy_reg < 0) 890 return -EIO; 891 c45_ids->device_ids[i] |= phy_reg; 892 } 893 894 c45_ids->devices_in_package = devs_in_pkg; 895 /* Bit 0 doesn't represent a device, it indicates c22 regs presence */ 896 c45_ids->mmds_present = devs_in_pkg & ~BIT(0); 897 898 return 0; 899 } 900 901 /** 902 * get_phy_c22_id - reads the specified addr for its clause 22 ID. 903 * @bus: the target MII bus 904 * @addr: PHY address on the MII bus 905 * @phy_id: where to store the ID retrieved. 906 * 907 * Read the 802.3 clause 22 PHY ID from the PHY at @addr on the @bus, 908 * placing it in @phy_id. Return zero on successful read and the ID is 909 * valid, %-EIO on bus access error, or %-ENODEV if no device responds 910 * or invalid ID. 911 */ 912 static int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id) 913 { 914 int phy_reg; 915 916 /* Grab the bits from PHYIR1, and put them in the upper half */ 917 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); 918 if (phy_reg < 0) { 919 /* returning -ENODEV doesn't stop bus scanning */ 920 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO; 921 } 922 923 *phy_id = phy_reg << 16; 924 925 /* Grab the bits from PHYIR2, and put them in the lower half */ 926 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); 927 if (phy_reg < 0) { 928 /* returning -ENODEV doesn't stop bus scanning */ 929 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO; 930 } 931 932 *phy_id |= phy_reg; 933 934 /* If the phy_id is mostly Fs, there is no device there */ 935 if ((*phy_id & 0x1fffffff) == 0x1fffffff) 936 return -ENODEV; 937 938 return 0; 939 } 940 941 /* Extract the phy ID from the compatible string of the form 942 * ethernet-phy-idAAAA.BBBB. 943 */ 944 int fwnode_get_phy_id(struct fwnode_handle *fwnode, u32 *phy_id) 945 { 946 unsigned int upper, lower; 947 const char *cp; 948 int ret; 949 950 ret = fwnode_property_read_string(fwnode, "compatible", &cp); 951 if (ret) 952 return ret; 953 954 if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) != 2) 955 return -EINVAL; 956 957 *phy_id = ((upper & GENMASK(15, 0)) << 16) | (lower & GENMASK(15, 0)); 958 return 0; 959 } 960 EXPORT_SYMBOL(fwnode_get_phy_id); 961 962 /** 963 * get_phy_device - reads the specified PHY device and returns its @phy_device 964 * struct 965 * @bus: the target MII bus 966 * @addr: PHY address on the MII bus 967 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol 968 * 969 * Probe for a PHY at @addr on @bus. 970 * 971 * When probing for a clause 22 PHY, then read the ID registers. If we find 972 * a valid ID, allocate and return a &struct phy_device. 973 * 974 * When probing for a clause 45 PHY, read the "devices in package" registers. 975 * If the "devices in package" appears valid, read the ID registers for each 976 * MMD, allocate and return a &struct phy_device. 977 * 978 * Returns an allocated &struct phy_device on success, %-ENODEV if there is 979 * no PHY present, or %-EIO on bus access error. 980 */ 981 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) 982 { 983 struct phy_c45_device_ids c45_ids; 984 u32 phy_id = 0; 985 int r; 986 987 c45_ids.devices_in_package = 0; 988 c45_ids.mmds_present = 0; 989 memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids)); 990 991 if (is_c45) 992 r = get_phy_c45_ids(bus, addr, &c45_ids); 993 else 994 r = get_phy_c22_id(bus, addr, &phy_id); 995 996 if (r) 997 return ERR_PTR(r); 998 999 /* PHY device such as the Marvell Alaska 88E2110 will return a PHY ID 1000 * of 0 when probed using get_phy_c22_id() with no error. Proceed to 1001 * probe with C45 to see if we're able to get a valid PHY ID in the C45 1002 * space, if successful, create the C45 PHY device. 1003 */ 1004 if (!is_c45 && phy_id == 0 && bus->read_c45) { 1005 r = get_phy_c45_ids(bus, addr, &c45_ids); 1006 if (!r) 1007 return phy_device_create(bus, addr, phy_id, 1008 true, &c45_ids); 1009 } 1010 1011 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); 1012 } 1013 EXPORT_SYMBOL(get_phy_device); 1014 1015 /** 1016 * phy_device_register - Register the phy device on the MDIO bus 1017 * @phydev: phy_device structure to be added to the MDIO bus 1018 */ 1019 int phy_device_register(struct phy_device *phydev) 1020 { 1021 int err; 1022 1023 err = mdiobus_register_device(&phydev->mdio); 1024 if (err) 1025 return err; 1026 1027 /* Deassert the reset signal */ 1028 phy_device_reset(phydev, 0); 1029 1030 /* Run all of the fixups for this PHY */ 1031 err = phy_scan_fixups(phydev); 1032 if (err) { 1033 phydev_err(phydev, "failed to initialize\n"); 1034 goto out; 1035 } 1036 1037 err = device_add(&phydev->mdio.dev); 1038 if (err) { 1039 phydev_err(phydev, "failed to add\n"); 1040 goto out; 1041 } 1042 1043 return 0; 1044 1045 out: 1046 /* Assert the reset signal */ 1047 phy_device_reset(phydev, 1); 1048 1049 mdiobus_unregister_device(&phydev->mdio); 1050 return err; 1051 } 1052 EXPORT_SYMBOL(phy_device_register); 1053 1054 /** 1055 * phy_device_remove - Remove a previously registered phy device from the MDIO bus 1056 * @phydev: phy_device structure to remove 1057 * 1058 * This doesn't free the phy_device itself, it merely reverses the effects 1059 * of phy_device_register(). Use phy_device_free() to free the device 1060 * after calling this function. 1061 */ 1062 void phy_device_remove(struct phy_device *phydev) 1063 { 1064 unregister_mii_timestamper(phydev->mii_ts); 1065 pse_control_put(phydev->psec); 1066 1067 device_del(&phydev->mdio.dev); 1068 1069 /* Assert the reset signal */ 1070 phy_device_reset(phydev, 1); 1071 1072 mdiobus_unregister_device(&phydev->mdio); 1073 } 1074 EXPORT_SYMBOL(phy_device_remove); 1075 1076 /** 1077 * phy_get_c45_ids - Read 802.3-c45 IDs for phy device. 1078 * @phydev: phy_device structure to read 802.3-c45 IDs 1079 * 1080 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if 1081 * the "devices in package" is invalid. 1082 */ 1083 int phy_get_c45_ids(struct phy_device *phydev) 1084 { 1085 return get_phy_c45_ids(phydev->mdio.bus, phydev->mdio.addr, 1086 &phydev->c45_ids); 1087 } 1088 EXPORT_SYMBOL(phy_get_c45_ids); 1089 1090 /** 1091 * phy_find_next - finds the next PHY device on the bus 1092 * @bus: the target MII bus 1093 * @pos: cursor 1094 * 1095 * Return: next phy_device on the bus, or NULL 1096 */ 1097 struct phy_device *phy_find_next(struct mii_bus *bus, struct phy_device *pos) 1098 { 1099 for (int addr = pos ? pos->mdio.addr + 1 : 0; 1100 addr < PHY_MAX_ADDR; addr++) { 1101 struct phy_device *phydev = mdiobus_get_phy(bus, addr); 1102 1103 if (phydev) 1104 return phydev; 1105 } 1106 return NULL; 1107 } 1108 EXPORT_SYMBOL_GPL(phy_find_next); 1109 1110 /** 1111 * phy_prepare_link - prepares the PHY layer to monitor link status 1112 * @phydev: target phy_device struct 1113 * @handler: callback function for link status change notifications 1114 * 1115 * Description: Tells the PHY infrastructure to handle the 1116 * gory details on monitoring link status (whether through 1117 * polling or an interrupt), and to call back to the 1118 * connected device driver when the link status changes. 1119 * If you want to monitor your own link state, don't call 1120 * this function. 1121 */ 1122 static void phy_prepare_link(struct phy_device *phydev, 1123 void (*handler)(struct net_device *)) 1124 { 1125 phydev->adjust_link = handler; 1126 } 1127 1128 /** 1129 * phy_connect_direct - connect an ethernet device to a specific phy_device 1130 * @dev: the network device to connect 1131 * @phydev: the pointer to the phy device 1132 * @handler: callback function for state change notifications 1133 * @interface: PHY device's interface 1134 */ 1135 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, 1136 void (*handler)(struct net_device *), 1137 phy_interface_t interface) 1138 { 1139 int rc; 1140 1141 if (!dev) 1142 return -EINVAL; 1143 1144 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); 1145 if (rc) 1146 return rc; 1147 1148 phy_prepare_link(phydev, handler); 1149 if (phy_interrupt_is_valid(phydev)) 1150 phy_request_interrupt(phydev); 1151 1152 return 0; 1153 } 1154 EXPORT_SYMBOL(phy_connect_direct); 1155 1156 /** 1157 * phy_connect - connect an ethernet device to a PHY device 1158 * @dev: the network device to connect 1159 * @bus_id: the id string of the PHY device to connect 1160 * @handler: callback function for state change notifications 1161 * @interface: PHY device's interface 1162 * 1163 * Description: Convenience function for connecting ethernet 1164 * devices to PHY devices. The default behavior is for 1165 * the PHY infrastructure to handle everything, and only notify 1166 * the connected driver when the link status changes. If you 1167 * don't want, or can't use the provided functionality, you may 1168 * choose to call only the subset of functions which provide 1169 * the desired functionality. 1170 */ 1171 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, 1172 void (*handler)(struct net_device *), 1173 phy_interface_t interface) 1174 { 1175 struct phy_device *phydev; 1176 struct device *d; 1177 int rc; 1178 1179 /* Search the list of PHY devices on the mdio bus for the 1180 * PHY with the requested name 1181 */ 1182 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); 1183 if (!d) { 1184 pr_err("PHY %s not found\n", bus_id); 1185 return ERR_PTR(-ENODEV); 1186 } 1187 phydev = to_phy_device(d); 1188 1189 rc = phy_connect_direct(dev, phydev, handler, interface); 1190 put_device(d); 1191 if (rc) 1192 return ERR_PTR(rc); 1193 1194 return phydev; 1195 } 1196 EXPORT_SYMBOL(phy_connect); 1197 1198 /** 1199 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY 1200 * device 1201 * @phydev: target phy_device struct 1202 */ 1203 void phy_disconnect(struct phy_device *phydev) 1204 { 1205 if (phy_is_started(phydev)) 1206 phy_stop(phydev); 1207 1208 if (phy_interrupt_is_valid(phydev)) 1209 phy_free_interrupt(phydev); 1210 1211 phydev->adjust_link = NULL; 1212 1213 phy_detach(phydev); 1214 } 1215 EXPORT_SYMBOL(phy_disconnect); 1216 1217 /** 1218 * phy_poll_reset - Safely wait until a PHY reset has properly completed 1219 * @phydev: The PHY device to poll 1220 * 1221 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as 1222 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR 1223 * register must be polled until the BMCR_RESET bit clears. 1224 * 1225 * Furthermore, any attempts to write to PHY registers may have no effect 1226 * or even generate MDIO bus errors until this is complete. 1227 * 1228 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the 1229 * standard and do not fully reset after the BMCR_RESET bit is set, and may 1230 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an 1231 * effort to support such broken PHYs, this function is separate from the 1232 * standard phy_init_hw() which will zero all the other bits in the BMCR 1233 * and reapply all driver-specific and board-specific fixups. 1234 */ 1235 static int phy_poll_reset(struct phy_device *phydev) 1236 { 1237 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ 1238 int ret, val; 1239 1240 ret = phy_read_poll_timeout(phydev, MII_BMCR, val, !(val & BMCR_RESET), 1241 50000, 600000, true); 1242 if (ret) 1243 return ret; 1244 /* Some chips (smsc911x) may still need up to another 1ms after the 1245 * BMCR_RESET bit is cleared before they are usable. 1246 */ 1247 msleep(1); 1248 return 0; 1249 } 1250 1251 int phy_init_hw(struct phy_device *phydev) 1252 { 1253 int ret = 0; 1254 1255 /* Deassert the reset signal */ 1256 phy_device_reset(phydev, 0); 1257 1258 if (!phydev->drv) 1259 return 0; 1260 1261 if (phydev->drv->soft_reset) { 1262 ret = phydev->drv->soft_reset(phydev); 1263 if (ret < 0) 1264 return ret; 1265 1266 /* see comment in genphy_soft_reset for an explanation */ 1267 phydev->suspended = 0; 1268 } 1269 1270 ret = phy_scan_fixups(phydev); 1271 if (ret < 0) 1272 return ret; 1273 1274 phy_interface_zero(phydev->possible_interfaces); 1275 1276 if (phydev->drv->config_init) { 1277 ret = phydev->drv->config_init(phydev); 1278 if (ret < 0) 1279 return ret; 1280 } 1281 1282 if (phydev->drv->config_intr) { 1283 ret = phydev->drv->config_intr(phydev); 1284 if (ret < 0) 1285 return ret; 1286 } 1287 1288 /* Re-apply autonomous EEE disable after soft reset */ 1289 if (phydev->autonomous_eee_disabled && 1290 phydev->drv->disable_autonomous_eee) { 1291 ret = phydev->drv->disable_autonomous_eee(phydev); 1292 if (ret) 1293 return ret; 1294 } 1295 1296 return 0; 1297 } 1298 EXPORT_SYMBOL(phy_init_hw); 1299 1300 void phy_attached_info(struct phy_device *phydev) 1301 { 1302 phy_attached_print(phydev, NULL); 1303 } 1304 EXPORT_SYMBOL(phy_attached_info); 1305 1306 #define ATTACHED_FMT "attached PHY driver %s(mii_bus:phy_addr=%s, irq=%s)" 1307 char *phy_attached_info_irq(struct phy_device *phydev) 1308 { 1309 char *irq_str; 1310 char irq_num[8]; 1311 1312 switch(phydev->irq) { 1313 case PHY_POLL: 1314 irq_str = "POLL"; 1315 break; 1316 case PHY_MAC_INTERRUPT: 1317 irq_str = "MAC"; 1318 break; 1319 default: 1320 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq); 1321 irq_str = irq_num; 1322 break; 1323 } 1324 1325 return kasprintf(GFP_KERNEL, "%s", irq_str); 1326 } 1327 EXPORT_SYMBOL(phy_attached_info_irq); 1328 1329 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...) 1330 { 1331 const char *unbound = phydev->drv ? "" : "[unbound] "; 1332 char *irq_str = phy_attached_info_irq(phydev); 1333 1334 if (!fmt) { 1335 phydev_info(phydev, ATTACHED_FMT "\n", unbound, 1336 phydev_name(phydev), irq_str); 1337 } else { 1338 va_list ap; 1339 1340 phydev_info(phydev, ATTACHED_FMT, unbound, 1341 phydev_name(phydev), irq_str); 1342 1343 va_start(ap, fmt); 1344 vprintk(fmt, ap); 1345 va_end(ap); 1346 } 1347 kfree(irq_str); 1348 } 1349 EXPORT_SYMBOL(phy_attached_print); 1350 1351 static void phy_sysfs_create_links(struct phy_device *phydev) 1352 { 1353 struct net_device *dev = phydev->attached_dev; 1354 int err; 1355 1356 if (!dev) 1357 return; 1358 1359 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj, 1360 "attached_dev"); 1361 if (err) 1362 return; 1363 1364 err = sysfs_create_link_nowarn(&dev->dev.kobj, 1365 &phydev->mdio.dev.kobj, 1366 "phydev"); 1367 if (err) { 1368 dev_err(&dev->dev, "could not add device link to %s err %d\n", 1369 kobject_name(&phydev->mdio.dev.kobj), 1370 err); 1371 /* non-fatal - some net drivers can use one netdevice 1372 * with more then one phy 1373 */ 1374 } 1375 1376 phydev->sysfs_links = true; 1377 } 1378 1379 static ssize_t 1380 phy_standalone_show(struct device *dev, struct device_attribute *attr, 1381 char *buf) 1382 { 1383 struct phy_device *phydev = to_phy_device(dev); 1384 1385 return sysfs_emit(buf, "%d\n", !phydev->attached_dev); 1386 } 1387 static DEVICE_ATTR_RO(phy_standalone); 1388 1389 /** 1390 * phy_sfp_connect_phy - Connect the SFP module's PHY to the upstream PHY 1391 * @upstream: pointer to the upstream phy device 1392 * @phy: pointer to the SFP module's phy device 1393 * 1394 * This helper allows keeping track of PHY devices on the link. It adds the 1395 * SFP module's phy to the phy namespace of the upstream phy 1396 * 1397 * Return: 0 on success, otherwise a negative error code. 1398 */ 1399 static int phy_sfp_connect_phy(void *upstream, struct phy_device *phy) 1400 { 1401 struct phy_device *phydev = upstream; 1402 struct net_device *dev = phydev->attached_dev; 1403 int ret; 1404 1405 phydev->has_sfp_mod_phy = true; 1406 phy_set_upstream_port(phy, phydev->sfp_cage_port); 1407 1408 /* If we aren't attached to a netdev, we can't add the SFP PHY to its 1409 * topology. 1410 */ 1411 if (!dev) 1412 return 0; 1413 1414 ret = phy_link_topo_add_phy(dev, phy, PHY_UPSTREAM_PHY, phydev); 1415 if (ret) 1416 phydev->has_sfp_mod_phy = false; 1417 1418 return ret; 1419 } 1420 1421 /** 1422 * phy_sfp_disconnect_phy - Disconnect the SFP module's PHY from the upstream PHY 1423 * @upstream: pointer to the upstream phy device 1424 * @phy: pointer to the SFP module's phy device 1425 * 1426 * This helper allows keeping track of PHY devices on the link. It removes the 1427 * SFP module's phy to the phy namespace of the upstream phy. As the module phy 1428 * will be destroyed, re-inserting the same module will add a new phy with a 1429 * new index. 1430 */ 1431 static void phy_sfp_disconnect_phy(void *upstream, struct phy_device *phy) 1432 { 1433 struct phy_device *phydev = upstream; 1434 struct net_device *dev = phydev->attached_dev; 1435 1436 phydev->has_sfp_mod_phy = false; 1437 1438 if (dev) 1439 phy_link_topo_del_phy(dev, phy); 1440 1441 phy_set_upstream_port(phy, NULL); 1442 } 1443 1444 /** 1445 * phy_sfp_attach - attach the SFP bus to the PHY upstream network device 1446 * @upstream: pointer to the phy device 1447 * @bus: sfp bus representing cage being attached 1448 * 1449 * This is used to fill in the sfp_upstream_ops .attach member. 1450 */ 1451 static void phy_sfp_attach(void *upstream, struct sfp_bus *bus) 1452 { 1453 struct phy_device *phydev = upstream; 1454 1455 if (phydev->attached_dev) 1456 phydev->attached_dev->sfp_bus = bus; 1457 phydev->sfp_bus_attached = true; 1458 } 1459 1460 /** 1461 * phy_sfp_detach - detach the SFP bus from the PHY upstream network device 1462 * @upstream: pointer to the phy device 1463 * @bus: sfp bus representing cage being attached 1464 * 1465 * This is used to fill in the sfp_upstream_ops .detach member. 1466 */ 1467 static void phy_sfp_detach(void *upstream, struct sfp_bus *bus) 1468 { 1469 struct phy_device *phydev = upstream; 1470 1471 if (phydev->attached_dev) 1472 phydev->attached_dev->sfp_bus = NULL; 1473 phydev->sfp_bus_attached = false; 1474 } 1475 1476 static int phy_sfp_module_insert(void *upstream, const struct sfp_eeprom_id *id) 1477 { 1478 __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support); 1479 struct phy_device *phydev = upstream; 1480 const struct sfp_module_caps *caps; 1481 struct phy_port *port; 1482 1483 phy_interface_t iface; 1484 1485 linkmode_zero(sfp_support); 1486 1487 port = phy_get_sfp_port(phydev); 1488 if (!port) 1489 return -EINVAL; 1490 1491 caps = sfp_get_module_caps(phydev->sfp_bus); 1492 1493 linkmode_and(sfp_support, port->supported, caps->link_modes); 1494 if (linkmode_empty(sfp_support)) { 1495 dev_err(&phydev->mdio.dev, "incompatible SFP module inserted, no common linkmode\n"); 1496 return -EINVAL; 1497 } 1498 1499 iface = sfp_select_interface(phydev->sfp_bus, sfp_support); 1500 if (iface == PHY_INTERFACE_MODE_NA) { 1501 dev_err(&phydev->mdio.dev, "PHY %s does not support the SFP module's requested MII interfaces\n", 1502 phydev_name(phydev)); 1503 return -EINVAL; 1504 } 1505 1506 if (phydev->n_ports == 1) 1507 phydev->port = caps->port; 1508 1509 if (port->ops && port->ops->configure_mii) 1510 return port->ops->configure_mii(port, true, iface); 1511 1512 return 0; 1513 } 1514 1515 static void phy_sfp_module_remove(void *upstream) 1516 { 1517 struct phy_device *phydev = upstream; 1518 struct phy_port *port = phy_get_sfp_port(phydev); 1519 1520 if (port && port->ops && port->ops->configure_mii) 1521 port->ops->configure_mii(port, false, PHY_INTERFACE_MODE_NA); 1522 1523 if (phydev->n_ports == 1) 1524 phydev->port = PORT_NONE; 1525 } 1526 1527 static void phy_sfp_link_up(void *upstream) 1528 { 1529 struct phy_device *phydev = upstream; 1530 struct phy_port *port = phy_get_sfp_port(phydev); 1531 1532 if (port && port->ops && port->ops->link_up) 1533 port->ops->link_up(port); 1534 } 1535 1536 static void phy_sfp_link_down(void *upstream) 1537 { 1538 struct phy_device *phydev = upstream; 1539 struct phy_port *port = phy_get_sfp_port(phydev); 1540 1541 if (port && port->ops && port->ops->link_down) 1542 port->ops->link_down(port); 1543 } 1544 1545 static int phy_add_sfp_mod_port(struct phy_device *phydev) 1546 { 1547 DECLARE_PHY_INTERFACE_MASK(interfaces); 1548 const struct sfp_module_caps *caps; 1549 struct phy_port *port; 1550 int ret = 0; 1551 1552 /* Create mod port */ 1553 port = phy_port_alloc(); 1554 if (!port) 1555 return -ENOMEM; 1556 1557 port->active = true; 1558 1559 caps = sfp_get_module_caps(phydev->sfp_bus); 1560 1561 phy_interface_and(interfaces, phydev->sfp_cage_port->interfaces, 1562 caps->interfaces); 1563 phy_caps_linkmode_filter_ifaces(port->supported, caps->link_modes, 1564 interfaces); 1565 1566 if (phydev->attached_dev) { 1567 ret = phy_link_topo_add_port(phydev->attached_dev, port); 1568 if (ret) { 1569 phy_port_destroy(port); 1570 return ret; 1571 } 1572 } 1573 1574 /* we don't use phy_add_port() here as the module port isn't a direct 1575 * interface from the PHY, but rather an extension to the sfp-bus, that 1576 * is already represented by its own phy_port 1577 */ 1578 phydev->mod_port = port; 1579 1580 port->upstream_port = phydev->sfp_cage_port; 1581 1582 return 0; 1583 } 1584 1585 static void phy_del_sfp_mod_port(struct phy_device *phydev) 1586 { 1587 if (!phydev->mod_port) 1588 return; 1589 1590 if (phydev->attached_dev) 1591 phy_link_topo_del_port(phydev->attached_dev, phydev->mod_port); 1592 1593 phy_port_destroy(phydev->mod_port); 1594 phydev->mod_port = NULL; 1595 } 1596 1597 static int phy_sfp_module_start(void *upstream) 1598 { 1599 struct phy_device *phydev = upstream; 1600 1601 /* If there's a downstream SFP module, and it doesn't contain a PHY 1602 * device, let's create a phy_port to represent that module. 1603 */ 1604 if (!phydev->has_sfp_mod_phy) 1605 return phy_add_sfp_mod_port(phydev); 1606 1607 return 0; 1608 } 1609 1610 static void phy_sfp_module_stop(void *upstream) 1611 { 1612 struct phy_device *phydev = upstream; 1613 1614 /* Called upon module removal or upstream removal */ 1615 if (!phydev->has_sfp_mod_phy) 1616 phy_del_sfp_mod_port(phydev); 1617 } 1618 1619 static const struct sfp_upstream_ops sfp_phydev_ops = { 1620 .attach = phy_sfp_attach, 1621 .detach = phy_sfp_detach, 1622 .module_insert = phy_sfp_module_insert, 1623 .module_remove = phy_sfp_module_remove, 1624 .link_up = phy_sfp_link_up, 1625 .link_down = phy_sfp_link_down, 1626 .connect_phy = phy_sfp_connect_phy, 1627 .disconnect_phy = phy_sfp_disconnect_phy, 1628 .module_start = phy_sfp_module_start, 1629 .module_stop = phy_sfp_module_stop, 1630 }; 1631 1632 static int phy_add_port(struct phy_device *phydev, struct phy_port *port) 1633 { 1634 int ret = 0; 1635 1636 if (phydev->n_ports == phydev->max_n_ports) 1637 return -EBUSY; 1638 1639 /* We set all ports as active by default, PHY drivers may deactivate 1640 * them (when unused) 1641 */ 1642 port->active = true; 1643 1644 if (port->is_mii) { 1645 if (phydev->drv && phydev->drv->attach_mii_port) 1646 ret = phydev->drv->attach_mii_port(phydev, port); 1647 } else { 1648 if (phydev->drv && phydev->drv->attach_mdi_port) 1649 ret = phydev->drv->attach_mdi_port(phydev, port); 1650 } 1651 1652 if (ret) 1653 return ret; 1654 1655 /* The PHY driver might have added, removed or set medium/pairs info, 1656 * so update the port supported accordingly. 1657 */ 1658 phy_port_update_supported(port); 1659 1660 list_add(&port->head, &phydev->ports); 1661 1662 phydev->n_ports++; 1663 1664 return 0; 1665 } 1666 1667 static void phy_del_port(struct phy_device *phydev, struct phy_port *port) 1668 { 1669 if (!phydev->n_ports) 1670 return; 1671 1672 list_del(&port->head); 1673 1674 if (phydev->attached_dev) 1675 phy_link_topo_del_port(phydev->attached_dev, port); 1676 1677 phydev->n_ports--; 1678 } 1679 1680 static struct phy_port *phy_setup_sfp_port(struct phy_device *phydev) 1681 { 1682 struct phy_port *port = phy_port_alloc(); 1683 int ret; 1684 1685 if (!port) 1686 return ERR_PTR(-ENOMEM); 1687 1688 port->parent_type = PHY_PORT_PHY; 1689 port->phy = phydev; 1690 1691 /* The PHY is a media converter, the port connected to the SFP cage 1692 * is a MII port. 1693 */ 1694 port->is_mii = true; 1695 port->is_sfp = true; 1696 1697 /* The port->supported and port->interfaces list will be populated 1698 * when attaching the port to the phydev. 1699 */ 1700 ret = phy_add_port(phydev, port); 1701 if (ret) { 1702 phy_port_destroy(port); 1703 return ERR_PTR(ret); 1704 } 1705 1706 return port; 1707 } 1708 1709 /** 1710 * phy_sfp_probe - probe for a SFP cage attached to this PHY device 1711 * @phydev: Pointer to phy_device 1712 */ 1713 static int phy_sfp_probe(struct phy_device *phydev) 1714 { 1715 struct phy_port *port; 1716 struct sfp_bus *bus; 1717 1718 if (!phydev->mdio.dev.fwnode) 1719 return 0; 1720 1721 bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode); 1722 if (IS_ERR(bus)) 1723 return PTR_ERR(bus); 1724 1725 phydev->sfp_bus = bus; 1726 1727 if (bus) { 1728 port = phy_setup_sfp_port(phydev); 1729 if (IS_ERR(port)) { 1730 sfp_bus_put(bus); 1731 phydev->sfp_bus = NULL; 1732 return PTR_ERR(port); 1733 } 1734 1735 phydev->sfp_cage_port = port; 1736 } 1737 1738 return 0; 1739 } 1740 1741 static int phy_sfp_add_upstream(struct phy_device *phydev) 1742 { 1743 struct sfp_bus *bus = phydev->sfp_bus; 1744 int ret; 1745 1746 ret = sfp_bus_add_upstream(bus, phydev, &sfp_phydev_ops); 1747 if (ret) { 1748 sfp_bus_put(bus); 1749 phydev->sfp_bus = NULL; 1750 phydev->sfp_cage_port = NULL; 1751 return ret; 1752 } 1753 1754 /* sfp_bus_add_upstream() grabs a ref to the sfp bus on success, it's 1755 * safe to release it now. 1756 */ 1757 sfp_bus_put(bus); 1758 1759 return 0; 1760 } 1761 1762 /** 1763 * phy_sfp_release - release resources set up by phy_sfp_probe() 1764 * @phydev: the PHY device 1765 * 1766 * Release the SFP resources set up by a successful phy_sfp_probe(). Unregister 1767 * the upstream before destroying its phy_port, so SFP upstream callbacks cannot 1768 * race with port destruction. 1769 */ 1770 static void phy_sfp_release(struct phy_device *phydev) 1771 { 1772 struct phy_port *port, *tmp; 1773 1774 sfp_bus_del_upstream(phydev->sfp_bus); 1775 phydev->sfp_bus = NULL; 1776 1777 list_for_each_entry_safe(port, tmp, &phydev->ports, head) { 1778 if (!port->is_sfp) 1779 continue; 1780 1781 phy_del_port(phydev, port); 1782 phy_port_destroy(port); 1783 } 1784 } 1785 1786 static bool phy_drv_supports_irq(const struct phy_driver *phydrv) 1787 { 1788 return phydrv->config_intr && phydrv->handle_interrupt; 1789 } 1790 1791 /** 1792 * phy_detach_internal - detach a PHY device from its network device 1793 * @phydev: target phy_device struct 1794 * @notify_bus: whether to notify the MDIO bus about the PHY detach 1795 * 1796 * This detaches the phy device from its network device and the phy 1797 * driver, and drops the reference count taken in phy_attach_direct(). 1798 */ 1799 static void phy_detach_internal(struct phy_device *phydev, bool notify_bus) 1800 { 1801 struct net_device *dev = phydev->attached_dev; 1802 struct module *ndev_owner = NULL; 1803 struct mii_bus *bus; 1804 1805 if (phydev->devlink) { 1806 device_link_del(phydev->devlink); 1807 phydev->devlink = NULL; 1808 } 1809 1810 if (phydev->sysfs_links) { 1811 if (dev) 1812 sysfs_remove_link(&dev->dev.kobj, "phydev"); 1813 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev"); 1814 } 1815 1816 if (!phydev->attached_dev) 1817 sysfs_remove_file(&phydev->mdio.dev.kobj, 1818 &dev_attr_phy_standalone.attr); 1819 1820 phy_suspend(phydev); 1821 1822 if (notify_bus && phydev->mdio.bus->notify_phy_detach) 1823 phydev->mdio.bus->notify_phy_detach(phydev); 1824 1825 if (dev) { 1826 struct hwtstamp_provider *hwprov; 1827 1828 /* hwprov may technically be protected by ops lock but 1829 * not for devices with a phydev, see phy_link_topo_add_phy() 1830 */ 1831 hwprov = rtnl_dereference(dev->hwprov); 1832 /* Disable timestamp if it is the one selected */ 1833 if (hwprov && hwprov->phydev == phydev) { 1834 rcu_assign_pointer(dev->hwprov, NULL); 1835 kfree_rcu(hwprov, rcu_head); 1836 } 1837 1838 phydev->attached_dev->phydev = NULL; 1839 phydev->attached_dev = NULL; 1840 phy_link_topo_del_phy(dev, phydev); 1841 if (phydev->mod_port) 1842 phy_link_topo_del_port(dev, phydev->mod_port); 1843 } 1844 1845 phydev->phy_link_change = NULL; 1846 phydev->phylink = NULL; 1847 1848 module_put(phydev->drv_owner); 1849 phydev->drv_owner = NULL; 1850 1851 /* If the device had no specific driver before (i.e. - it 1852 * was using the generic driver), we unbind the device 1853 * from the generic driver so that there's a chance a 1854 * real driver could be loaded 1855 */ 1856 if (phydev->is_genphy_driven) { 1857 /* The release below lets phy_probe() write this field. */ 1858 phydev->irq = phydev->mdio.bus->irq[phydev->mdio.addr]; 1859 device_release_driver(&phydev->mdio.dev); 1860 phydev->is_genphy_driven = 0; 1861 } 1862 1863 /* Assert the reset signal */ 1864 phy_device_reset(phydev, 1); 1865 1866 /* 1867 * The phydev might go away on the put_device() below, so avoid 1868 * a use-after-free bug by reading the underlying bus first. 1869 */ 1870 bus = phydev->mdio.bus; 1871 1872 put_device(&phydev->mdio.dev); 1873 if (dev) 1874 ndev_owner = dev->dev.parent->driver->owner; 1875 if (ndev_owner != bus->owner) 1876 module_put(bus->owner); 1877 } 1878 1879 /** 1880 * phy_detach - detach a PHY device from its network device 1881 * @phydev: target phy_device struct 1882 * 1883 * This detaches the phy device from its network device and the phy 1884 * driver, and drops the reference count taken in phy_attach_direct(). 1885 */ 1886 void phy_detach(struct phy_device *phydev) 1887 { 1888 /* cleanup including bus notification */ 1889 phy_detach_internal(phydev, true); 1890 } 1891 EXPORT_SYMBOL(phy_detach); 1892 1893 /** 1894 * phy_attach_direct - attach a network device to a given PHY device pointer 1895 * @dev: network device to attach 1896 * @phydev: Pointer to phy_device to attach 1897 * @flags: PHY device's dev_flags 1898 * @interface: PHY device's interface 1899 * 1900 * Description: Called by drivers to attach to a particular PHY 1901 * device. The phy_device is found, and properly hooked up 1902 * to the phy_driver. If no driver is attached, then a 1903 * generic driver is used. The phy_device is given a ptr to 1904 * the attaching device, and given a callback for link status 1905 * change. The phy_device is returned to the attaching driver. 1906 * This function takes a reference on the phy device. 1907 */ 1908 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, 1909 u32 flags, phy_interface_t interface) 1910 { 1911 struct mii_bus *bus = phydev->mdio.bus; 1912 struct device *d = &phydev->mdio.dev; 1913 struct module *ndev_owner = NULL; 1914 struct module *drv_owner; 1915 int irq = phydev->irq; 1916 int err; 1917 1918 /* For Ethernet device drivers that register their own MDIO bus, we 1919 * will have bus->owner match ndev_mod, so we do not want to increment 1920 * our own module->refcnt here, otherwise we would not be able to 1921 * unload later on. 1922 */ 1923 if (dev) 1924 ndev_owner = dev->dev.parent->driver->owner; 1925 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) { 1926 phydev_err(phydev, "failed to get the bus module\n"); 1927 return -EIO; 1928 } 1929 1930 get_device(d); 1931 1932 /* Set by every attach, with or without a netdev */ 1933 if (phydev->phy_link_change) { 1934 phydev_err(phydev, "PHY already attached\n"); 1935 err = -EBUSY; 1936 goto error_put_device; 1937 } 1938 1939 /* Assume that if there is no driver, that it doesn't 1940 * exist, and we should use the genphy driver. 1941 */ 1942 if (!d->driver) { 1943 if (phydev->is_c45) 1944 d->driver = &genphy_c45_driver.mdiodrv.driver; 1945 else 1946 d->driver = &genphy_driver.mdiodrv.driver; 1947 1948 phydev->is_genphy_driven = 1; 1949 } 1950 1951 drv_owner = d->driver->owner; 1952 if (!try_module_get(drv_owner)) { 1953 phydev_err(phydev, "failed to get the device driver module\n"); 1954 err = -EIO; 1955 goto error_put_device; 1956 } 1957 phydev->drv_owner = drv_owner; 1958 1959 if (phydev->is_genphy_driven) { 1960 err = d->driver->probe(d); 1961 if (err >= 0) 1962 err = device_bind_driver(d); 1963 1964 if (err) 1965 goto error_module_put; 1966 } 1967 1968 phydev->phy_link_change = phy_link_change; 1969 if (dev) { 1970 phydev->attached_dev = dev; 1971 dev->phydev = phydev; 1972 1973 if (phydev->sfp_bus_attached) 1974 dev->sfp_bus = phydev->sfp_bus; 1975 1976 err = phy_link_topo_add_phy(dev, phydev, PHY_UPSTREAM_MAC, dev); 1977 if (err) 1978 goto error; 1979 1980 if (phydev->mod_port) { 1981 err = phy_link_topo_add_port(dev, phydev->mod_port); 1982 if (err) 1983 goto error; 1984 } 1985 } 1986 1987 /* Some Ethernet drivers try to connect to a PHY device before 1988 * calling register_netdevice() -> netdev_register_kobject() and 1989 * does the dev->dev.kobj initialization. Here we only check for 1990 * success which indicates that the network device kobject is 1991 * ready. Once we do that we still need to keep track of whether 1992 * links were successfully set up or not for phy_detach() to 1993 * remove them accordingly. 1994 */ 1995 phydev->sysfs_links = false; 1996 1997 phy_sysfs_create_links(phydev); 1998 1999 if (!phydev->attached_dev) { 2000 err = sysfs_create_file(&phydev->mdio.dev.kobj, 2001 &dev_attr_phy_standalone.attr); 2002 if (err) 2003 phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n"); 2004 } 2005 2006 phydev->dev_flags |= flags; 2007 2008 phydev->interface = interface; 2009 2010 phydev->state = PHY_READY; 2011 2012 phydev->interrupts = PHY_INTERRUPT_DISABLED; 2013 2014 /* PHYs can request to use poll mode even though they have an 2015 * associated interrupt line. This could be the case if they 2016 * detect a broken interrupt handling. 2017 */ 2018 if (phydev->dev_flags & PHY_F_NO_IRQ) 2019 phydev->irq = PHY_POLL; 2020 2021 if (!phy_drv_supports_irq(phydev->drv) && phy_interrupt_is_valid(phydev)) 2022 phydev->irq = PHY_POLL; 2023 2024 /* Port is set to PORT_TP by default and the actual PHY driver will set 2025 * it to different value depending on the PHY configuration. If we have 2026 * the generic PHY driver we can't figure it out, thus set the old 2027 * legacy PORT_MII value. 2028 */ 2029 if (phydev->is_genphy_driven) 2030 phydev->port = PORT_MII; 2031 2032 /* Initial carrier state is off as the phy is about to be 2033 * (re)initialized. 2034 */ 2035 if (dev) 2036 netif_carrier_off(phydev->attached_dev); 2037 2038 /* Do initial configuration here, now that 2039 * we have certain key parameters 2040 * (dev_flags and interface) 2041 */ 2042 err = phy_init_hw(phydev); 2043 if (err) 2044 goto error; 2045 2046 if (phydev->mdio.bus->notify_phy_attach) { 2047 err = phydev->mdio.bus->notify_phy_attach(phydev); 2048 if (err) 2049 goto error; 2050 } 2051 2052 phy_resume(phydev); 2053 2054 /** 2055 * If the external phy used by current mac interface is managed by 2056 * another mac interface, so we should create a device link between 2057 * phy dev and mac dev. 2058 */ 2059 if (dev && phydev->mdio.bus->parent && dev->dev.parent != phydev->mdio.bus->parent) 2060 phydev->devlink = device_link_add(dev->dev.parent, &phydev->mdio.dev, 2061 DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS); 2062 2063 return err; 2064 2065 error: 2066 /* phy_detach_internal() does all of the cleanup below */ 2067 phy_detach_internal(phydev, false); 2068 return err; 2069 2070 error_module_put: 2071 module_put(phydev->drv_owner); 2072 phydev->drv_owner = NULL; 2073 phydev->irq = irq; 2074 phydev->is_genphy_driven = 0; 2075 d->driver = NULL; 2076 error_put_device: 2077 put_device(d); 2078 if (ndev_owner != bus->owner) 2079 module_put(bus->owner); 2080 return err; 2081 } 2082 EXPORT_SYMBOL(phy_attach_direct); 2083 2084 int phy_suspend(struct phy_device *phydev) 2085 { 2086 struct net_device *netdev = phydev->attached_dev; 2087 const struct phy_driver *phydrv = phydev->drv; 2088 int ret; 2089 2090 if (phydev->suspended || !phydrv) 2091 return 0; 2092 2093 phydev->wol_enabled = phy_may_wakeup(phydev) || 2094 (netdev && netdev->ethtool->wol_enabled); 2095 /* If the device has WOL enabled, we cannot suspend the PHY */ 2096 if (phydev->wol_enabled && !(phydrv->flags & PHY_ALWAYS_CALL_SUSPEND)) 2097 return -EBUSY; 2098 2099 if (!phydrv->suspend) 2100 return 0; 2101 2102 ret = phydrv->suspend(phydev); 2103 if (!ret) 2104 phydev->suspended = true; 2105 2106 return ret; 2107 } 2108 EXPORT_SYMBOL(phy_suspend); 2109 2110 int __phy_resume(struct phy_device *phydev) 2111 { 2112 const struct phy_driver *phydrv = phydev->drv; 2113 int ret; 2114 2115 lockdep_assert_held(&phydev->lock); 2116 2117 if (!phydrv || !phydrv->resume) 2118 return 0; 2119 2120 ret = phydrv->resume(phydev); 2121 if (!ret) 2122 phydev->suspended = false; 2123 2124 return ret; 2125 } 2126 EXPORT_SYMBOL(__phy_resume); 2127 2128 int phy_resume(struct phy_device *phydev) 2129 { 2130 int ret; 2131 2132 mutex_lock(&phydev->lock); 2133 ret = __phy_resume(phydev); 2134 mutex_unlock(&phydev->lock); 2135 2136 return ret; 2137 } 2138 EXPORT_SYMBOL(phy_resume); 2139 2140 /** 2141 * phy_reset_after_clk_enable - perform a PHY reset if needed 2142 * @phydev: target phy_device struct 2143 * 2144 * Description: Some PHYs are known to need a reset after their refclk was 2145 * enabled. This function evaluates the flags and perform the reset if it's 2146 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy 2147 * was reset. 2148 */ 2149 int phy_reset_after_clk_enable(struct phy_device *phydev) 2150 { 2151 if (!phydev || !phydev->drv) 2152 return -ENODEV; 2153 2154 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) { 2155 phy_device_reset(phydev, 1); 2156 phy_device_reset(phydev, 0); 2157 return 1; 2158 } 2159 2160 return 0; 2161 } 2162 EXPORT_SYMBOL(phy_reset_after_clk_enable); 2163 2164 /* Generic PHY support and helper functions */ 2165 2166 /** 2167 * genphy_config_advert - sanitize and advertise auto-negotiation parameters 2168 * @phydev: target phy_device struct 2169 * @advert: auto-negotiation parameters to advertise 2170 * 2171 * Description: Writes MII_ADVERTISE with the appropriate values, 2172 * after sanitizing the values to make sure we only advertise 2173 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement 2174 * hasn't changed, and > 0 if it has changed. 2175 */ 2176 static int genphy_config_advert(struct phy_device *phydev, 2177 const unsigned long *advert) 2178 { 2179 int err, bmsr, changed = 0; 2180 u32 adv; 2181 2182 adv = linkmode_adv_to_mii_adv_t(advert); 2183 2184 /* Setup standard advertisement */ 2185 err = phy_modify_changed(phydev, MII_ADVERTISE, 2186 ADVERTISE_ALL | ADVERTISE_100BASE4 | 2187 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM, 2188 adv); 2189 if (err < 0) 2190 return err; 2191 if (err > 0) 2192 changed = 1; 2193 2194 bmsr = phy_read(phydev, MII_BMSR); 2195 if (bmsr < 0) 2196 return bmsr; 2197 2198 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all 2199 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a 2200 * logical 1. 2201 */ 2202 if (!(bmsr & BMSR_ESTATEN)) 2203 return changed; 2204 2205 adv = linkmode_adv_to_mii_ctrl1000_t(advert); 2206 2207 err = phy_modify_changed(phydev, MII_CTRL1000, 2208 ADVERTISE_1000FULL | ADVERTISE_1000HALF, 2209 adv); 2210 if (err < 0) 2211 return err; 2212 if (err > 0) 2213 changed = 1; 2214 2215 return changed; 2216 } 2217 2218 /** 2219 * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters 2220 * @phydev: target phy_device struct 2221 * 2222 * Description: Writes MII_ADVERTISE with the appropriate values, 2223 * after sanitizing the values to make sure we only advertise 2224 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement 2225 * hasn't changed, and > 0 if it has changed. This function is intended 2226 * for Clause 37 1000Base-X mode. 2227 */ 2228 static int genphy_c37_config_advert(struct phy_device *phydev) 2229 { 2230 u16 adv = 0; 2231 2232 /* Only allow advertising what this PHY supports */ 2233 linkmode_and(phydev->advertising, phydev->advertising, 2234 phydev->supported); 2235 2236 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 2237 phydev->advertising)) 2238 adv |= ADVERTISE_1000XFULL; 2239 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2240 phydev->advertising)) 2241 adv |= ADVERTISE_1000XPAUSE; 2242 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2243 phydev->advertising)) 2244 adv |= ADVERTISE_1000XPSE_ASYM; 2245 2246 return phy_modify_changed(phydev, MII_ADVERTISE, 2247 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE | 2248 ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM, 2249 adv); 2250 } 2251 2252 /** 2253 * genphy_setup_forced - configures/forces speed/duplex from @phydev 2254 * @phydev: target phy_device struct 2255 * 2256 * Description: Configures MII_BMCR to force speed/duplex 2257 * to the values in phydev. Assumes that the values are valid. 2258 * Please see phy_sanitize_settings(). 2259 */ 2260 int genphy_setup_forced(struct phy_device *phydev) 2261 { 2262 u16 ctl; 2263 2264 phydev->pause = false; 2265 phydev->asym_pause = false; 2266 2267 ctl = mii_bmcr_encode_fixed(phydev->speed, phydev->duplex); 2268 2269 return phy_modify(phydev, MII_BMCR, 2270 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl); 2271 } 2272 EXPORT_SYMBOL(genphy_setup_forced); 2273 2274 static int genphy_setup_master_slave(struct phy_device *phydev) 2275 { 2276 u16 ctl = 0; 2277 2278 if (!phydev->is_gigabit_capable) 2279 return 0; 2280 2281 switch (phydev->master_slave_set) { 2282 case MASTER_SLAVE_CFG_MASTER_PREFERRED: 2283 ctl |= CTL1000_PREFER_MASTER; 2284 break; 2285 case MASTER_SLAVE_CFG_SLAVE_PREFERRED: 2286 break; 2287 case MASTER_SLAVE_CFG_MASTER_FORCE: 2288 ctl |= CTL1000_AS_MASTER; 2289 fallthrough; 2290 case MASTER_SLAVE_CFG_SLAVE_FORCE: 2291 ctl |= CTL1000_ENABLE_MASTER; 2292 break; 2293 case MASTER_SLAVE_CFG_UNKNOWN: 2294 case MASTER_SLAVE_CFG_UNSUPPORTED: 2295 return 0; 2296 default: 2297 phydev_warn(phydev, "Unsupported Master/Slave mode\n"); 2298 return -EOPNOTSUPP; 2299 } 2300 2301 return phy_modify_changed(phydev, MII_CTRL1000, 2302 (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER | 2303 CTL1000_PREFER_MASTER), ctl); 2304 } 2305 2306 int genphy_read_master_slave(struct phy_device *phydev) 2307 { 2308 int cfg, state; 2309 int val; 2310 2311 phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN; 2312 phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN; 2313 2314 val = phy_read(phydev, MII_CTRL1000); 2315 if (val < 0) 2316 return val; 2317 2318 if (val & CTL1000_ENABLE_MASTER) { 2319 if (val & CTL1000_AS_MASTER) 2320 cfg = MASTER_SLAVE_CFG_MASTER_FORCE; 2321 else 2322 cfg = MASTER_SLAVE_CFG_SLAVE_FORCE; 2323 } else { 2324 if (val & CTL1000_PREFER_MASTER) 2325 cfg = MASTER_SLAVE_CFG_MASTER_PREFERRED; 2326 else 2327 cfg = MASTER_SLAVE_CFG_SLAVE_PREFERRED; 2328 } 2329 2330 val = phy_read(phydev, MII_STAT1000); 2331 if (val < 0) 2332 return val; 2333 2334 if (val & LPA_1000MSFAIL) { 2335 state = MASTER_SLAVE_STATE_ERR; 2336 } else if (phydev->link) { 2337 /* this bits are valid only for active link */ 2338 if (val & LPA_1000MSRES) 2339 state = MASTER_SLAVE_STATE_MASTER; 2340 else 2341 state = MASTER_SLAVE_STATE_SLAVE; 2342 } else { 2343 state = MASTER_SLAVE_STATE_UNKNOWN; 2344 } 2345 2346 phydev->master_slave_get = cfg; 2347 phydev->master_slave_state = state; 2348 2349 return 0; 2350 } 2351 EXPORT_SYMBOL(genphy_read_master_slave); 2352 2353 /** 2354 * genphy_restart_aneg - Enable and Restart Autonegotiation 2355 * @phydev: target phy_device struct 2356 */ 2357 int genphy_restart_aneg(struct phy_device *phydev) 2358 { 2359 /* Don't isolate the PHY if we're negotiating */ 2360 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, 2361 BMCR_ANENABLE | BMCR_ANRESTART); 2362 } 2363 EXPORT_SYMBOL(genphy_restart_aneg); 2364 2365 /** 2366 * genphy_check_and_restart_aneg - Enable and restart auto-negotiation 2367 * @phydev: target phy_device struct 2368 * @restart: whether aneg restart is requested 2369 * 2370 * Check, and restart auto-negotiation if needed. 2371 */ 2372 int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart) 2373 { 2374 int ret; 2375 2376 if (!restart) { 2377 /* Advertisement hasn't changed, but maybe aneg was never on to 2378 * begin with? Or maybe phy was isolated? 2379 */ 2380 ret = phy_read(phydev, MII_BMCR); 2381 if (ret < 0) 2382 return ret; 2383 2384 if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE)) 2385 restart = true; 2386 } 2387 2388 if (restart) 2389 return genphy_restart_aneg(phydev); 2390 2391 return 0; 2392 } 2393 EXPORT_SYMBOL(genphy_check_and_restart_aneg); 2394 2395 /** 2396 * __genphy_config_aneg - restart auto-negotiation or write BMCR 2397 * @phydev: target phy_device struct 2398 * @changed: whether autoneg is requested 2399 * 2400 * Description: If auto-negotiation is enabled, we configure the 2401 * advertising, and then restart auto-negotiation. If it is not 2402 * enabled, then we write the BMCR. 2403 */ 2404 int __genphy_config_aneg(struct phy_device *phydev, bool changed) 2405 { 2406 __ETHTOOL_DECLARE_LINK_MODE_MASK(fixed_advert); 2407 const struct link_capabilities *c; 2408 unsigned long *advert; 2409 int err; 2410 2411 err = genphy_c45_an_config_eee_aneg(phydev); 2412 if (err < 0) 2413 return err; 2414 else if (err) 2415 changed = true; 2416 2417 err = genphy_setup_master_slave(phydev); 2418 if (err < 0) 2419 return err; 2420 else if (err) 2421 changed = true; 2422 2423 if (phydev->autoneg == AUTONEG_ENABLE) { 2424 /* Only allow advertising what this PHY supports */ 2425 linkmode_and(phydev->advertising, phydev->advertising, 2426 phydev->supported); 2427 advert = phydev->advertising; 2428 } else if (phydev->speed < SPEED_1000) { 2429 return genphy_setup_forced(phydev); 2430 } else { 2431 linkmode_zero(fixed_advert); 2432 2433 c = phy_caps_lookup(phydev->speed, phydev->duplex, 2434 phydev->supported, true); 2435 if (c) 2436 linkmode_and(fixed_advert, phydev->supported, 2437 c->linkmodes); 2438 2439 advert = fixed_advert; 2440 } 2441 2442 err = genphy_config_advert(phydev, advert); 2443 if (err < 0) /* error */ 2444 return err; 2445 else if (err) 2446 changed = true; 2447 2448 return genphy_check_and_restart_aneg(phydev, changed); 2449 } 2450 EXPORT_SYMBOL(__genphy_config_aneg); 2451 2452 /** 2453 * genphy_c37_config_aneg - restart auto-negotiation or write BMCR 2454 * @phydev: target phy_device struct 2455 * 2456 * Description: If auto-negotiation is enabled, we configure the 2457 * advertising, and then restart auto-negotiation. If it is not 2458 * enabled, then we write the BMCR. This function is intended 2459 * for use with Clause 37 1000Base-X mode. 2460 */ 2461 int genphy_c37_config_aneg(struct phy_device *phydev) 2462 { 2463 int err, changed; 2464 2465 if (phydev->autoneg != AUTONEG_ENABLE) 2466 return genphy_setup_forced(phydev); 2467 2468 err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100, 2469 BMCR_SPEED1000); 2470 if (err) 2471 return err; 2472 2473 changed = genphy_c37_config_advert(phydev); 2474 if (changed < 0) /* error */ 2475 return changed; 2476 2477 if (!changed) { 2478 /* Advertisement hasn't changed, but maybe aneg was never on to 2479 * begin with? Or maybe phy was isolated? 2480 */ 2481 int ctl = phy_read(phydev, MII_BMCR); 2482 2483 if (ctl < 0) 2484 return ctl; 2485 2486 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) 2487 changed = 1; /* do restart aneg */ 2488 } 2489 2490 /* Only restart aneg if we are advertising something different 2491 * than we were before. 2492 */ 2493 if (changed > 0) 2494 return genphy_restart_aneg(phydev); 2495 2496 return 0; 2497 } 2498 EXPORT_SYMBOL(genphy_c37_config_aneg); 2499 2500 /** 2501 * genphy_aneg_done - return auto-negotiation status 2502 * @phydev: target phy_device struct 2503 * 2504 * Description: Reads the status register and returns 0 either if 2505 * auto-negotiation is incomplete, or if there was an error. 2506 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. 2507 */ 2508 int genphy_aneg_done(struct phy_device *phydev) 2509 { 2510 int retval = phy_read(phydev, MII_BMSR); 2511 2512 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); 2513 } 2514 EXPORT_SYMBOL(genphy_aneg_done); 2515 2516 /** 2517 * genphy_update_link - update link status in @phydev 2518 * @phydev: target phy_device struct 2519 * 2520 * Description: Update the value in phydev->link to reflect the 2521 * current link value. In order to do this, we need to read 2522 * the status register twice, keeping the second value. 2523 */ 2524 int genphy_update_link(struct phy_device *phydev) 2525 { 2526 int status = 0, bmcr; 2527 2528 bmcr = phy_read(phydev, MII_BMCR); 2529 if (bmcr < 0) 2530 return bmcr; 2531 2532 /* Autoneg is being started, therefore disregard BMSR value and 2533 * report link as down. 2534 */ 2535 if (bmcr & BMCR_ANRESTART) 2536 goto done; 2537 2538 /* The link state is latched low so that momentary link 2539 * drops can be detected. Do not double-read the status 2540 * in polling mode to detect such short link drops except 2541 * if the link was already down. 2542 */ 2543 if (!phy_polling_mode(phydev) || !phydev->link) { 2544 status = phy_read(phydev, MII_BMSR); 2545 if (status < 0) 2546 return status; 2547 else if (status & BMSR_LSTATUS) 2548 goto done; 2549 } 2550 2551 /* Read link and autonegotiation status */ 2552 status = phy_read(phydev, MII_BMSR); 2553 if (status < 0) 2554 return status; 2555 done: 2556 phydev->link = status & BMSR_LSTATUS ? 1 : 0; 2557 phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0; 2558 2559 /* Consider the case that autoneg was started and "aneg complete" 2560 * bit has been reset, but "link up" bit not yet. 2561 */ 2562 if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete) 2563 phydev->link = 0; 2564 2565 return 0; 2566 } 2567 EXPORT_SYMBOL(genphy_update_link); 2568 2569 int genphy_read_lpa(struct phy_device *phydev) 2570 { 2571 int lpa, lpagb; 2572 2573 if (phydev->autoneg == AUTONEG_ENABLE) { 2574 if (!phydev->autoneg_complete) { 2575 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, 2576 0); 2577 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0); 2578 return 0; 2579 } 2580 2581 if (phydev->is_gigabit_capable) { 2582 lpagb = phy_read(phydev, MII_STAT1000); 2583 if (lpagb < 0) 2584 return lpagb; 2585 2586 if (lpagb & LPA_1000MSFAIL) { 2587 int adv = phy_read(phydev, MII_CTRL1000); 2588 2589 if (adv < 0) 2590 return adv; 2591 2592 if (adv & CTL1000_ENABLE_MASTER) 2593 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n"); 2594 else 2595 phydev_err(phydev, "Master/Slave resolution failed\n"); 2596 return -ENOLINK; 2597 } 2598 2599 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, 2600 lpagb); 2601 } 2602 2603 lpa = phy_read(phydev, MII_LPA); 2604 if (lpa < 0) 2605 return lpa; 2606 2607 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa); 2608 } else { 2609 linkmode_zero(phydev->lp_advertising); 2610 } 2611 2612 return 0; 2613 } 2614 EXPORT_SYMBOL(genphy_read_lpa); 2615 2616 /** 2617 * genphy_read_status_fixed - read the link parameters for !aneg mode 2618 * @phydev: target phy_device struct 2619 * 2620 * Read the current duplex and speed state for a PHY operating with 2621 * autonegotiation disabled. 2622 */ 2623 int genphy_read_status_fixed(struct phy_device *phydev) 2624 { 2625 int bmcr = phy_read(phydev, MII_BMCR); 2626 2627 if (bmcr < 0) 2628 return bmcr; 2629 2630 if (bmcr & BMCR_FULLDPLX) 2631 phydev->duplex = DUPLEX_FULL; 2632 else 2633 phydev->duplex = DUPLEX_HALF; 2634 2635 if (bmcr & BMCR_SPEED1000) 2636 phydev->speed = SPEED_1000; 2637 else if (bmcr & BMCR_SPEED100) 2638 phydev->speed = SPEED_100; 2639 else 2640 phydev->speed = SPEED_10; 2641 2642 return 0; 2643 } 2644 EXPORT_SYMBOL(genphy_read_status_fixed); 2645 2646 /** 2647 * genphy_read_status - check the link status and update current link state 2648 * @phydev: target phy_device struct 2649 * 2650 * Description: Check the link, then figure out the current state 2651 * by comparing what we advertise with what the link partner 2652 * advertises. Start by checking the gigabit possibilities, 2653 * then move on to 10/100. 2654 */ 2655 int genphy_read_status(struct phy_device *phydev) 2656 { 2657 int err, old_link = phydev->link; 2658 2659 /* Update the link, but return if there was an error */ 2660 err = genphy_update_link(phydev); 2661 if (err) 2662 return err; 2663 2664 /* why bother the PHY if nothing can have changed */ 2665 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) 2666 return 0; 2667 2668 phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED; 2669 phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED; 2670 phydev->speed = SPEED_UNKNOWN; 2671 phydev->duplex = DUPLEX_UNKNOWN; 2672 phydev->pause = false; 2673 phydev->asym_pause = false; 2674 2675 if (phydev->is_gigabit_capable) { 2676 err = genphy_read_master_slave(phydev); 2677 if (err < 0) 2678 return err; 2679 } 2680 2681 err = genphy_read_lpa(phydev); 2682 if (err < 0) 2683 return err; 2684 2685 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { 2686 phy_resolve_aneg_linkmode(phydev); 2687 } else if (phydev->autoneg == AUTONEG_DISABLE) { 2688 err = genphy_read_status_fixed(phydev); 2689 if (err < 0) 2690 return err; 2691 } 2692 2693 return 0; 2694 } 2695 EXPORT_SYMBOL(genphy_read_status); 2696 2697 /** 2698 * genphy_c37_read_status - check the link status and update current link state 2699 * @phydev: target phy_device struct 2700 * @changed: pointer where to store if link changed 2701 * 2702 * Description: Check the link, then figure out the current state 2703 * by comparing what we advertise with what the link partner 2704 * advertises. This function is for Clause 37 1000Base-X mode. 2705 * 2706 * If link has changed, @changed is set to true, false otherwise. 2707 */ 2708 int genphy_c37_read_status(struct phy_device *phydev, bool *changed) 2709 { 2710 int lpa, err, old_link = phydev->link; 2711 2712 /* Update the link, but return if there was an error */ 2713 err = genphy_update_link(phydev); 2714 if (err) 2715 return err; 2716 2717 /* why bother the PHY if nothing can have changed */ 2718 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) { 2719 *changed = false; 2720 return 0; 2721 } 2722 2723 /* Signal link has changed */ 2724 *changed = true; 2725 phydev->duplex = DUPLEX_UNKNOWN; 2726 phydev->pause = false; 2727 phydev->asym_pause = false; 2728 2729 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { 2730 lpa = phy_read(phydev, MII_LPA); 2731 if (lpa < 0) 2732 return lpa; 2733 2734 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2735 phydev->lp_advertising, lpa & LPA_LPACK); 2736 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 2737 phydev->lp_advertising, lpa & LPA_1000XFULL); 2738 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2739 phydev->lp_advertising, lpa & LPA_1000XPAUSE); 2740 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2741 phydev->lp_advertising, 2742 lpa & LPA_1000XPAUSE_ASYM); 2743 2744 phy_resolve_aneg_linkmode(phydev); 2745 } else if (phydev->autoneg == AUTONEG_DISABLE) { 2746 int bmcr = phy_read(phydev, MII_BMCR); 2747 2748 if (bmcr < 0) 2749 return bmcr; 2750 2751 if (bmcr & BMCR_FULLDPLX) 2752 phydev->duplex = DUPLEX_FULL; 2753 else 2754 phydev->duplex = DUPLEX_HALF; 2755 } 2756 2757 return 0; 2758 } 2759 EXPORT_SYMBOL(genphy_c37_read_status); 2760 2761 /** 2762 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit 2763 * @phydev: target phy_device struct 2764 * 2765 * Description: Perform a software PHY reset using the standard 2766 * BMCR_RESET bit and poll for the reset bit to be cleared. 2767 * 2768 * Returns: 0 on success, < 0 on failure 2769 */ 2770 int genphy_soft_reset(struct phy_device *phydev) 2771 { 2772 u16 res = BMCR_RESET; 2773 int ret; 2774 2775 if (phydev->autoneg == AUTONEG_ENABLE) 2776 res |= BMCR_ANRESTART; 2777 2778 ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res); 2779 if (ret < 0) 2780 return ret; 2781 2782 /* Clause 22 states that setting bit BMCR_RESET sets control registers 2783 * to their default value. Therefore the POWER DOWN bit is supposed to 2784 * be cleared after soft reset. 2785 */ 2786 phydev->suspended = 0; 2787 2788 ret = phy_poll_reset(phydev); 2789 if (ret) 2790 return ret; 2791 2792 /* BMCR may be reset to defaults */ 2793 if (phydev->autoneg == AUTONEG_DISABLE) 2794 ret = genphy_setup_forced(phydev); 2795 2796 return ret; 2797 } 2798 EXPORT_SYMBOL(genphy_soft_reset); 2799 2800 irqreturn_t genphy_handle_interrupt_no_ack(struct phy_device *phydev) 2801 { 2802 /* It seems there are cases where the interrupts are handled by another 2803 * entity (ie an IRQ controller embedded inside the PHY) and do not 2804 * need any other interraction from phylib. In this case, just trigger 2805 * the state machine directly. 2806 */ 2807 phy_trigger_machine(phydev); 2808 2809 return 0; 2810 } 2811 EXPORT_SYMBOL(genphy_handle_interrupt_no_ack); 2812 2813 /** 2814 * genphy_read_abilities - read PHY abilities from Clause 22 registers 2815 * @phydev: target phy_device struct 2816 * 2817 * Description: Reads the PHY's abilities and populates 2818 * phydev->supported accordingly. 2819 * 2820 * Returns: 0 on success, < 0 on failure 2821 */ 2822 int genphy_read_abilities(struct phy_device *phydev) 2823 { 2824 int val; 2825 2826 linkmode_set_bit_array(phy_basic_ports_array, 2827 ARRAY_SIZE(phy_basic_ports_array), 2828 phydev->supported); 2829 2830 val = phy_read(phydev, MII_BMSR); 2831 if (val < 0) 2832 return val; 2833 2834 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported, 2835 val & BMSR_ANEGCAPABLE); 2836 2837 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported, 2838 val & BMSR_100FULL); 2839 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported, 2840 val & BMSR_100HALF); 2841 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported, 2842 val & BMSR_10FULL); 2843 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported, 2844 val & BMSR_10HALF); 2845 2846 if (val & BMSR_ESTATEN) { 2847 val = phy_read(phydev, MII_ESTATUS); 2848 if (val < 0) 2849 return val; 2850 2851 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 2852 phydev->supported, val & ESTATUS_1000_TFULL); 2853 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 2854 phydev->supported, val & ESTATUS_1000_THALF); 2855 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 2856 phydev->supported, val & ESTATUS_1000_XFULL); 2857 } 2858 2859 /* This is optional functionality. If not supported, we may get an error 2860 * which should be ignored. 2861 */ 2862 genphy_c45_read_eee_abilities(phydev); 2863 2864 return 0; 2865 } 2866 EXPORT_SYMBOL(genphy_read_abilities); 2867 2868 /* Some PHYs support direct C45 register access but not C22 indirect 2869 * MMD access (registers 13 and 14). When discovered via C22, phylib 2870 * routes MMD access through the indirect path, which won't work on 2871 * these devices. These helpers bypass indirect access and use the bus 2872 * C45 accessors directly. 2873 */ 2874 int genphy_read_mmd_c45(struct phy_device *phydev, int devnum, u16 regnum) 2875 { 2876 struct mii_bus *bus = phydev->mdio.bus; 2877 int addr = phydev->mdio.addr; 2878 2879 return __mdiobus_c45_read(bus, addr, devnum, regnum); 2880 } 2881 EXPORT_SYMBOL(genphy_read_mmd_c45); 2882 2883 int genphy_write_mmd_c45(struct phy_device *phydev, int devnum, u16 regnum, 2884 u16 val) 2885 { 2886 struct mii_bus *bus = phydev->mdio.bus; 2887 int addr = phydev->mdio.addr; 2888 2889 return __mdiobus_c45_write(bus, addr, devnum, regnum, val); 2890 } 2891 EXPORT_SYMBOL(genphy_write_mmd_c45); 2892 2893 /* This is used for the phy device which doesn't support the MMD extended 2894 * register access, but it does have side effect when we are trying to access 2895 * the MMD register via indirect method. 2896 */ 2897 int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum) 2898 { 2899 return -EOPNOTSUPP; 2900 } 2901 EXPORT_SYMBOL(genphy_read_mmd_unsupported); 2902 2903 int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum, 2904 u16 regnum, u16 val) 2905 { 2906 return -EOPNOTSUPP; 2907 } 2908 EXPORT_SYMBOL(genphy_write_mmd_unsupported); 2909 2910 int genphy_suspend(struct phy_device *phydev) 2911 { 2912 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN); 2913 } 2914 EXPORT_SYMBOL(genphy_suspend); 2915 2916 int genphy_resume(struct phy_device *phydev) 2917 { 2918 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN); 2919 } 2920 EXPORT_SYMBOL(genphy_resume); 2921 2922 int genphy_loopback(struct phy_device *phydev, bool enable, int speed) 2923 { 2924 if (enable) { 2925 u16 ctl = BMCR_LOOPBACK; 2926 int ret, val; 2927 2928 if (speed == SPEED_10 || speed == SPEED_100 || 2929 speed == SPEED_1000) 2930 phydev->speed = speed; 2931 else if (speed) 2932 return -EINVAL; 2933 2934 ctl |= mii_bmcr_encode_fixed(phydev->speed, phydev->duplex); 2935 2936 phy_modify(phydev, MII_BMCR, ~0, ctl); 2937 2938 ret = phy_read_poll_timeout(phydev, MII_BMSR, val, 2939 val & BMSR_LSTATUS, 2940 5000, 500000, true); 2941 if (ret) 2942 return ret; 2943 } else { 2944 phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 0); 2945 2946 phy_config_aneg(phydev); 2947 } 2948 2949 return 0; 2950 } 2951 EXPORT_SYMBOL(genphy_loopback); 2952 2953 /** 2954 * phy_remove_link_mode - Remove a supported link mode 2955 * @phydev: phy_device structure to remove link mode from 2956 * @link_mode: Link mode to be removed 2957 * 2958 * Description: Some MACs don't support all link modes which the PHY 2959 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper 2960 * to remove a link mode. 2961 */ 2962 void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode) 2963 { 2964 linkmode_clear_bit(link_mode, phydev->supported); 2965 phy_advertise_supported(phydev); 2966 } 2967 EXPORT_SYMBOL(phy_remove_link_mode); 2968 2969 static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src) 2970 { 2971 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst, 2972 linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src)); 2973 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst, 2974 linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src)); 2975 } 2976 2977 /** 2978 * phy_advertise_supported - Advertise all supported modes 2979 * @phydev: target phy_device struct 2980 * 2981 * Description: Called to advertise all supported modes, doesn't touch 2982 * pause mode advertising. 2983 */ 2984 void phy_advertise_supported(struct phy_device *phydev) 2985 { 2986 __ETHTOOL_DECLARE_LINK_MODE_MASK(new); 2987 2988 linkmode_copy(new, phydev->supported); 2989 phy_copy_pause_bits(new, phydev->advertising); 2990 linkmode_copy(phydev->advertising, new); 2991 } 2992 EXPORT_SYMBOL(phy_advertise_supported); 2993 2994 /** 2995 * phy_advertise_eee_all - Advertise all supported EEE modes 2996 * @phydev: target phy_device struct 2997 * 2998 * Description: Per default phylib preserves the EEE advertising at the time of 2999 * phy probing, which might be a subset of the supported EEE modes. Use this 3000 * function when all supported EEE modes should be advertised. This does not 3001 * trigger auto-negotiation, so must be called before phy_start()/ 3002 * phylink_start() which will start auto-negotiation. 3003 */ 3004 void phy_advertise_eee_all(struct phy_device *phydev) 3005 { 3006 linkmode_andnot(phydev->advertising_eee, phydev->supported_eee, 3007 phydev->eee_disabled_modes); 3008 } 3009 EXPORT_SYMBOL_GPL(phy_advertise_eee_all); 3010 3011 /** 3012 * phy_support_eee - Set initial EEE policy configuration 3013 * @phydev: Target phy_device struct 3014 * 3015 * This function configures the initial policy for Energy Efficient Ethernet 3016 * (EEE) on the specified PHY device, influencing that EEE capabilities are 3017 * advertised before the link is established. It should be called during PHY 3018 * registration by the MAC driver and/or the PHY driver (for SmartEEE PHYs) 3019 * if MAC supports LPI or PHY is capable to compensate missing LPI functionality 3020 * of the MAC. 3021 * 3022 * The function sets default EEE policy parameters, including preparing the PHY 3023 * to advertise EEE capabilities based on hardware support. 3024 * 3025 * It also sets the expected configuration for Low Power Idle (LPI) in the MAC 3026 * driver. If the PHY framework determines that both local and remote 3027 * advertisements support EEE, and the negotiated link mode is compatible with 3028 * EEE, it will set enable_tx_lpi = true. The MAC driver is expected to act on 3029 * this setting by enabling the LPI timer if enable_tx_lpi is set. 3030 */ 3031 void phy_support_eee(struct phy_device *phydev) 3032 { 3033 linkmode_andnot(phydev->advertising_eee, phydev->supported_eee, 3034 phydev->eee_disabled_modes); 3035 phydev->eee_cfg.tx_lpi_enabled = true; 3036 phydev->eee_cfg.eee_enabled = true; 3037 3038 /* If the PHY supports autonomous EEE, disable it so the MAC can 3039 * manage LPI signaling instead. The flag is stored so it can be 3040 * re-applied after a PHY soft reset (e.g. suspend/resume). 3041 */ 3042 if (phydev->drv && phydev->drv->disable_autonomous_eee) { 3043 int ret = phydev->drv->disable_autonomous_eee(phydev); 3044 3045 if (ret) 3046 phydev_warn(phydev, "Failed to disable autonomous EEE: %pe\n", 3047 ERR_PTR(ret)); 3048 else 3049 phydev->autonomous_eee_disabled = true; 3050 } 3051 } 3052 EXPORT_SYMBOL(phy_support_eee); 3053 3054 /** 3055 * phy_disable_eee - Disable EEE for the PHY 3056 * @phydev: Target phy_device struct 3057 * 3058 * This function is used by MAC drivers for MAC's which don't support EEE. 3059 * It disables EEE on the PHY layer. 3060 */ 3061 void phy_disable_eee(struct phy_device *phydev) 3062 { 3063 linkmode_zero(phydev->advertising_eee); 3064 phydev->eee_cfg.tx_lpi_enabled = false; 3065 phydev->eee_cfg.eee_enabled = false; 3066 /* don't let userspace re-enable EEE advertisement */ 3067 linkmode_fill(phydev->eee_disabled_modes); 3068 } 3069 EXPORT_SYMBOL_GPL(phy_disable_eee); 3070 3071 /** 3072 * phy_support_sym_pause - Enable support of symmetrical pause 3073 * @phydev: target phy_device struct 3074 * 3075 * Description: Called by the MAC to indicate is supports symmetrical 3076 * Pause, but not asym pause. 3077 */ 3078 void phy_support_sym_pause(struct phy_device *phydev) 3079 { 3080 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported); 3081 phy_copy_pause_bits(phydev->advertising, phydev->supported); 3082 } 3083 EXPORT_SYMBOL(phy_support_sym_pause); 3084 3085 /** 3086 * phy_support_asym_pause - Enable support of asym pause 3087 * @phydev: target phy_device struct 3088 * 3089 * Description: Called by the MAC to indicate is supports Asym Pause. 3090 */ 3091 void phy_support_asym_pause(struct phy_device *phydev) 3092 { 3093 phy_copy_pause_bits(phydev->advertising, phydev->supported); 3094 } 3095 EXPORT_SYMBOL(phy_support_asym_pause); 3096 3097 /** 3098 * phy_set_sym_pause - Configure symmetric Pause 3099 * @phydev: target phy_device struct 3100 * @rx: Receiver Pause is supported 3101 * @tx: Transmit Pause is supported 3102 * @autoneg: Auto neg should be used 3103 * 3104 * Description: Configure advertised Pause support depending on if 3105 * receiver pause and pause auto neg is supported. Generally called 3106 * from the set_pauseparam .ndo. 3107 */ 3108 void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx, 3109 bool autoneg) 3110 { 3111 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported); 3112 3113 if (rx && tx && autoneg) 3114 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 3115 phydev->supported); 3116 3117 linkmode_copy(phydev->advertising, phydev->supported); 3118 } 3119 EXPORT_SYMBOL(phy_set_sym_pause); 3120 3121 /** 3122 * phy_set_asym_pause - Configure Pause and Asym Pause 3123 * @phydev: target phy_device struct 3124 * @rx: Receiver Pause is supported 3125 * @tx: Transmit Pause is supported 3126 * 3127 * Description: Configure advertised Pause support depending on if 3128 * transmit and receiver pause is supported. If there has been a 3129 * change in adverting, trigger a new autoneg. Generally called from 3130 * the set_pauseparam .ndo. 3131 */ 3132 void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx) 3133 { 3134 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv); 3135 3136 linkmode_copy(oldadv, phydev->advertising); 3137 linkmode_set_pause(phydev->advertising, tx, rx); 3138 3139 if (!linkmode_equal(oldadv, phydev->advertising) && 3140 phydev->autoneg) 3141 phy_start_aneg(phydev); 3142 } 3143 EXPORT_SYMBOL(phy_set_asym_pause); 3144 3145 /** 3146 * phy_validate_pause - Test if the PHY/MAC support the pause configuration 3147 * @phydev: phy_device struct 3148 * @pp: requested pause configuration 3149 * 3150 * Description: Test if the PHY/MAC combination supports the Pause 3151 * configuration the user is requesting. Returns True if it is 3152 * supported, false otherwise. 3153 */ 3154 bool phy_validate_pause(struct phy_device *phydev, 3155 struct ethtool_pauseparam *pp) 3156 { 3157 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 3158 phydev->supported) && pp->rx_pause) 3159 return false; 3160 3161 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 3162 phydev->supported) && 3163 pp->rx_pause != pp->tx_pause) 3164 return false; 3165 3166 return true; 3167 } 3168 EXPORT_SYMBOL(phy_validate_pause); 3169 3170 /** 3171 * phy_get_pause - resolve negotiated pause modes 3172 * @phydev: phy_device struct 3173 * @tx_pause: pointer to bool to indicate whether transmit pause should be 3174 * enabled. 3175 * @rx_pause: pointer to bool to indicate whether receive pause should be 3176 * enabled. 3177 * 3178 * Resolve and return the flow control modes according to the negotiation 3179 * result. This includes checking that we are operating in full duplex mode. 3180 * See linkmode_resolve_pause() for further details. 3181 */ 3182 void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause) 3183 { 3184 if (phydev->duplex != DUPLEX_FULL) { 3185 *tx_pause = false; 3186 *rx_pause = false; 3187 return; 3188 } 3189 3190 return linkmode_resolve_pause(phydev->advertising, 3191 phydev->lp_advertising, 3192 tx_pause, rx_pause); 3193 } 3194 EXPORT_SYMBOL(phy_get_pause); 3195 3196 #if IS_ENABLED(CONFIG_OF_MDIO) 3197 static int phy_get_u32_property(struct device *dev, const char *name, u32 *val) 3198 { 3199 return device_property_read_u32(dev, name, val); 3200 } 3201 #else 3202 static int phy_get_u32_property(struct device *dev, const char *name, u32 *val) 3203 { 3204 return -EINVAL; 3205 } 3206 #endif 3207 3208 /** 3209 * phy_get_internal_delay - returns the index of the internal delay 3210 * @phydev: phy_device struct 3211 * @delay_values: array of delays the PHY supports 3212 * @size: the size of the delay array 3213 * @is_rx: boolean to indicate to get the rx internal delay 3214 * 3215 * Returns the index within the array of internal delay passed in. 3216 * If the device property is not present then the interface type is checked 3217 * if the interface defines use of internal delay then a 1 is returned otherwise 3218 * a 0 is returned. 3219 * The array must be in ascending order. If PHY does not have an ascending order 3220 * array then size = 0 and the value of the delay property is returned. 3221 * Return -EINVAL if the delay is invalid or cannot be found. 3222 */ 3223 s32 phy_get_internal_delay(struct phy_device *phydev, const int *delay_values, 3224 int size, bool is_rx) 3225 { 3226 struct device *dev = &phydev->mdio.dev; 3227 int i, ret; 3228 u32 delay; 3229 3230 if (is_rx) { 3231 ret = phy_get_u32_property(dev, "rx-internal-delay-ps", &delay); 3232 if (ret < 0 && size == 0) { 3233 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || 3234 phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) 3235 return 1; 3236 else 3237 return 0; 3238 } 3239 3240 } else { 3241 ret = phy_get_u32_property(dev, "tx-internal-delay-ps", &delay); 3242 if (ret < 0 && size == 0) { 3243 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || 3244 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) 3245 return 1; 3246 else 3247 return 0; 3248 } 3249 } 3250 3251 if (ret < 0) 3252 return ret; 3253 3254 if (size == 0) 3255 return delay; 3256 3257 if (delay < delay_values[0] || delay > delay_values[size - 1]) { 3258 phydev_err(phydev, "Delay %d is out of range\n", delay); 3259 return -EINVAL; 3260 } 3261 3262 if (delay == delay_values[0]) 3263 return 0; 3264 3265 for (i = 1; i < size; i++) { 3266 if (delay == delay_values[i]) 3267 return i; 3268 3269 /* Find an approximate index by looking up the table */ 3270 if (delay > delay_values[i - 1] && 3271 delay < delay_values[i]) { 3272 if (delay - delay_values[i - 1] < 3273 delay_values[i] - delay) 3274 return i - 1; 3275 else 3276 return i; 3277 } 3278 } 3279 3280 phydev_err(phydev, "error finding internal delay index for %d\n", 3281 delay); 3282 3283 return -EINVAL; 3284 } 3285 EXPORT_SYMBOL(phy_get_internal_delay); 3286 3287 /** 3288 * phy_get_tx_amplitude_gain - stores tx amplitude gain in @val 3289 * @phydev: phy_device struct 3290 * @dev: pointer to the devices device struct 3291 * @linkmode: linkmode for which the tx amplitude gain should be retrieved 3292 * @val: tx amplitude gain 3293 * 3294 * Returns: 0 on success, < 0 on failure 3295 */ 3296 int phy_get_tx_amplitude_gain(struct phy_device *phydev, struct device *dev, 3297 enum ethtool_link_mode_bit_indices linkmode, 3298 u32 *val) 3299 { 3300 switch (linkmode) { 3301 case ETHTOOL_LINK_MODE_100baseT_Full_BIT: 3302 return phy_get_u32_property(dev, 3303 "tx-amplitude-100base-tx-percent", 3304 val); 3305 default: 3306 return -EINVAL; 3307 } 3308 } 3309 EXPORT_SYMBOL_GPL(phy_get_tx_amplitude_gain); 3310 3311 /** 3312 * phy_get_mac_termination - stores MAC termination in @val 3313 * @phydev: phy_device struct 3314 * @dev: pointer to the devices device struct 3315 * @val: MAC termination 3316 * 3317 * Returns: 0 on success, < 0 on failure 3318 */ 3319 int phy_get_mac_termination(struct phy_device *phydev, struct device *dev, 3320 u32 *val) 3321 { 3322 return phy_get_u32_property(dev, "mac-termination-ohms", val); 3323 } 3324 EXPORT_SYMBOL_GPL(phy_get_mac_termination); 3325 3326 static int phy_led_set_brightness(struct led_classdev *led_cdev, 3327 enum led_brightness value) 3328 { 3329 struct phy_led *phyled = to_phy_led(led_cdev); 3330 struct phy_device *phydev = phyled->phydev; 3331 int err; 3332 3333 mutex_lock(&phydev->lock); 3334 err = phydev->drv->led_brightness_set(phydev, phyled->index, value); 3335 mutex_unlock(&phydev->lock); 3336 3337 return err; 3338 } 3339 3340 static int phy_led_blink_set(struct led_classdev *led_cdev, 3341 unsigned long *delay_on, 3342 unsigned long *delay_off) 3343 { 3344 struct phy_led *phyled = to_phy_led(led_cdev); 3345 struct phy_device *phydev = phyled->phydev; 3346 int err; 3347 3348 mutex_lock(&phydev->lock); 3349 err = phydev->drv->led_blink_set(phydev, phyled->index, 3350 delay_on, delay_off); 3351 mutex_unlock(&phydev->lock); 3352 3353 return err; 3354 } 3355 3356 static __maybe_unused struct device * 3357 phy_led_hw_control_get_device(struct led_classdev *led_cdev) 3358 { 3359 struct phy_led *phyled = to_phy_led(led_cdev); 3360 struct phy_device *phydev = phyled->phydev; 3361 3362 if (phydev->attached_dev) 3363 return &phydev->attached_dev->dev; 3364 return NULL; 3365 } 3366 3367 static int __maybe_unused 3368 phy_led_hw_control_get(struct led_classdev *led_cdev, 3369 unsigned long *rules) 3370 { 3371 struct phy_led *phyled = to_phy_led(led_cdev); 3372 struct phy_device *phydev = phyled->phydev; 3373 int err; 3374 3375 mutex_lock(&phydev->lock); 3376 err = phydev->drv->led_hw_control_get(phydev, phyled->index, rules); 3377 mutex_unlock(&phydev->lock); 3378 3379 return err; 3380 } 3381 3382 static int __maybe_unused 3383 phy_led_hw_control_set(struct led_classdev *led_cdev, 3384 unsigned long rules) 3385 { 3386 struct phy_led *phyled = to_phy_led(led_cdev); 3387 struct phy_device *phydev = phyled->phydev; 3388 int err; 3389 3390 mutex_lock(&phydev->lock); 3391 err = phydev->drv->led_hw_control_set(phydev, phyled->index, rules); 3392 mutex_unlock(&phydev->lock); 3393 3394 return err; 3395 } 3396 3397 static __maybe_unused int phy_led_hw_is_supported(struct led_classdev *led_cdev, 3398 unsigned long rules) 3399 { 3400 struct phy_led *phyled = to_phy_led(led_cdev); 3401 struct phy_device *phydev = phyled->phydev; 3402 int err; 3403 3404 mutex_lock(&phydev->lock); 3405 err = phydev->drv->led_hw_is_supported(phydev, phyled->index, rules); 3406 mutex_unlock(&phydev->lock); 3407 3408 return err; 3409 } 3410 3411 static void phy_leds_unregister(struct phy_device *phydev) 3412 { 3413 struct phy_led *phyled, *tmp; 3414 3415 list_for_each_entry_safe(phyled, tmp, &phydev->leds, list) { 3416 led_classdev_unregister(&phyled->led_cdev); 3417 list_del(&phyled->list); 3418 } 3419 } 3420 3421 static int of_phy_led(struct phy_device *phydev, 3422 struct device_node *led) 3423 { 3424 struct device *dev = &phydev->mdio.dev; 3425 struct led_init_data init_data = {}; 3426 struct led_classdev *cdev; 3427 unsigned long modes = 0; 3428 struct phy_led *phyled; 3429 u32 index; 3430 int err; 3431 3432 phyled = devm_kzalloc(dev, sizeof(*phyled), GFP_KERNEL); 3433 if (!phyled) 3434 return -ENOMEM; 3435 3436 cdev = &phyled->led_cdev; 3437 phyled->phydev = phydev; 3438 3439 err = of_property_read_u32(led, "reg", &index); 3440 if (err) 3441 return err; 3442 if (index > U8_MAX) 3443 return -EINVAL; 3444 3445 if (of_property_read_bool(led, "active-high")) 3446 set_bit(PHY_LED_ACTIVE_HIGH, &modes); 3447 if (of_property_read_bool(led, "active-low")) 3448 set_bit(PHY_LED_ACTIVE_LOW, &modes); 3449 if (of_property_read_bool(led, "inactive-high-impedance")) 3450 set_bit(PHY_LED_INACTIVE_HIGH_IMPEDANCE, &modes); 3451 3452 if (WARN_ON(modes & BIT(PHY_LED_ACTIVE_LOW) && 3453 modes & BIT(PHY_LED_ACTIVE_HIGH))) 3454 return -EINVAL; 3455 3456 if (modes) { 3457 /* Return error if asked to set polarity modes but not supported */ 3458 if (!phydev->drv->led_polarity_set) 3459 return -EINVAL; 3460 3461 err = phydev->drv->led_polarity_set(phydev, index, modes); 3462 if (err) 3463 return err; 3464 } 3465 3466 phyled->index = index; 3467 if (phydev->drv->led_brightness_set) 3468 cdev->brightness_set_blocking = phy_led_set_brightness; 3469 if (phydev->drv->led_blink_set) 3470 cdev->blink_set = phy_led_blink_set; 3471 3472 #ifdef CONFIG_LEDS_TRIGGERS 3473 if (phydev->drv->led_hw_is_supported && 3474 phydev->drv->led_hw_control_set && 3475 phydev->drv->led_hw_control_get) { 3476 cdev->hw_control_is_supported = phy_led_hw_is_supported; 3477 cdev->hw_control_set = phy_led_hw_control_set; 3478 cdev->hw_control_get = phy_led_hw_control_get; 3479 cdev->hw_control_trigger = "netdev"; 3480 } 3481 3482 cdev->hw_control_get_device = phy_led_hw_control_get_device; 3483 #endif 3484 cdev->max_brightness = 1; 3485 init_data.devicename = dev_name(&phydev->mdio.dev); 3486 init_data.fwnode = of_fwnode_handle(led); 3487 init_data.devname_mandatory = true; 3488 3489 err = led_classdev_register_ext(dev, cdev, &init_data); 3490 if (err) 3491 return err; 3492 3493 list_add(&phyled->list, &phydev->leds); 3494 3495 return 0; 3496 } 3497 3498 static int of_phy_leds(struct phy_device *phydev) 3499 { 3500 struct device_node *node = phydev->mdio.dev.of_node; 3501 struct device_node *leds; 3502 int err; 3503 3504 if (!IS_ENABLED(CONFIG_OF_MDIO)) 3505 return 0; 3506 3507 if (!node) 3508 return 0; 3509 3510 leds = of_get_child_by_name(node, "leds"); 3511 if (!leds) 3512 return 0; 3513 3514 /* Check if the PHY driver have at least an OP to 3515 * set the LEDs. 3516 */ 3517 if (!(phydev->drv->led_brightness_set || 3518 phydev->drv->led_blink_set || 3519 phydev->drv->led_hw_control_set)) { 3520 phydev_dbg(phydev, "ignoring leds node defined with no PHY driver support\n"); 3521 goto exit; 3522 } 3523 3524 for_each_available_child_of_node_scoped(leds, led) { 3525 err = of_phy_led(phydev, led); 3526 if (err) { 3527 of_node_put(leds); 3528 phy_leds_unregister(phydev); 3529 return err; 3530 } 3531 } 3532 3533 exit: 3534 of_node_put(leds); 3535 return 0; 3536 } 3537 3538 static void phy_cleanup_ports(struct phy_device *phydev) 3539 { 3540 struct phy_port *tmp, *port; 3541 3542 list_for_each_entry_safe(port, tmp, &phydev->ports, head) { 3543 phy_del_port(phydev, port); 3544 phy_port_destroy(port); 3545 } 3546 } 3547 3548 static int phy_default_setup_single_port(struct phy_device *phydev) 3549 { 3550 struct phy_port *port = phy_port_alloc(); 3551 unsigned long mode; 3552 int ret; 3553 3554 if (!port) 3555 return -ENOMEM; 3556 3557 port->parent_type = PHY_PORT_PHY; 3558 port->phy = phydev; 3559 3560 /* Let the PHY driver know that this port was never described anywhere. 3561 * This is the usual case, where we assume single-port PHY devices with 3562 * no SFP. In that case, the port supports exactly the same thing as 3563 * the PHY itself. 3564 * 3565 * However, this can also be because we have a combo-port PHY, with 3566 * only one port described in DT, through SFP for example. 3567 * 3568 * In that case, the PHY driver will be in charge of saying what we can 3569 * do on that non-represented port. 3570 */ 3571 port->not_described = true; 3572 linkmode_copy(port->supported, phydev->supported); 3573 port->mediums = phy_caps_mediums_from_linkmodes(port->supported); 3574 3575 for_each_set_bit(mode, port->supported, __ETHTOOL_LINK_MODE_MASK_NBITS) 3576 port->pairs = max_t(int, port->pairs, 3577 ethtool_linkmode_n_pairs(mode)); 3578 3579 ret = phy_add_port(phydev, port); 3580 if (ret) 3581 phy_port_destroy(port); 3582 3583 return ret; 3584 } 3585 3586 static int of_phy_ports(struct phy_device *phydev) 3587 { 3588 struct device_node *node = phydev->mdio.dev.of_node; 3589 struct device_node *mdi; 3590 struct phy_port *port; 3591 int err; 3592 3593 if (!IS_ENABLED(CONFIG_OF_MDIO)) 3594 return 0; 3595 3596 if (!node) 3597 return 0; 3598 3599 mdi = of_get_child_by_name(node, "mdi"); 3600 if (!mdi) 3601 return 0; 3602 3603 for_each_available_child_of_node_scoped(mdi, port_node) { 3604 port = phy_of_parse_port(port_node); 3605 if (IS_ERR(port)) { 3606 err = PTR_ERR(port); 3607 goto out_err; 3608 } 3609 3610 port->parent_type = PHY_PORT_PHY; 3611 port->phy = phydev; 3612 3613 linkmode_copy(port->supported, phydev->supported); 3614 3615 err = phy_add_port(phydev, port); 3616 if (err) { 3617 phy_port_destroy(port); 3618 goto out_err; 3619 } 3620 } 3621 of_node_put(mdi); 3622 3623 return 0; 3624 3625 out_err: 3626 phy_cleanup_ports(phydev); 3627 of_node_put(mdi); 3628 return err; 3629 } 3630 3631 static int phy_setup_ports(struct phy_device *phydev) 3632 { 3633 __ETHTOOL_DECLARE_LINK_MODE_MASK(ports_supported); 3634 struct phy_port *port; 3635 int ret; 3636 3637 ret = of_phy_ports(phydev); 3638 if (ret) 3639 return ret; 3640 3641 /* We don't support SFP with genphy drivers. Also, genphy driver 3642 * binding occurs with RTNL help, which will deadlock the call to 3643 * sfp_bus_add_upstream(). 3644 */ 3645 if (!phydev->is_genphy_driven) { 3646 ret = phy_sfp_probe(phydev); 3647 if (ret) 3648 goto err_ports; 3649 } 3650 3651 if (phydev->n_ports < phydev->max_n_ports) { 3652 ret = phy_default_setup_single_port(phydev); 3653 if (ret) 3654 goto err_sfp; 3655 } 3656 3657 linkmode_zero(ports_supported); 3658 3659 /* Aggregate the supported modes, which are made-up of : 3660 * - What the PHY itself supports 3661 * - What the sum of all ports support 3662 */ 3663 list_for_each_entry(port, &phydev->ports, head) 3664 if (port->active) 3665 linkmode_or(ports_supported, ports_supported, 3666 port->supported); 3667 3668 if (!linkmode_empty(ports_supported)) 3669 linkmode_and(phydev->supported, phydev->supported, 3670 ports_supported); 3671 3672 /* For now, the phy->port field is set as the first active port's type */ 3673 list_for_each_entry(port, &phydev->ports, head) 3674 if (port->active) { 3675 phydev->port = phy_port_get_type(port); 3676 break; 3677 } 3678 3679 ret = phy_sfp_add_upstream(phydev); 3680 if (ret) 3681 goto err_sfp; 3682 3683 return 0; 3684 3685 err_sfp: 3686 phy_sfp_release(phydev); 3687 err_ports: 3688 phy_cleanup_ports(phydev); 3689 return ret; 3690 } 3691 3692 /** 3693 * phy_get_sfp_port() - Returns the first valid SFP port of a PHY 3694 * @phydev: pointer to the PHY device to get the SFP port from 3695 * 3696 * Returns: The first active SFP (serdes) port of a PHY device, NULL if none 3697 * exist. 3698 */ 3699 struct phy_port *phy_get_sfp_port(struct phy_device *phydev) 3700 { 3701 struct phy_port *port; 3702 3703 list_for_each_entry(port, &phydev->ports, head) 3704 if (port->active && port->is_sfp) 3705 return port; 3706 3707 return NULL; 3708 } 3709 EXPORT_SYMBOL_GPL(phy_get_sfp_port); 3710 3711 /** 3712 * phy_set_upstream_port() - Sets the phy_port controlling the MII this PHY is 3713 * attached to. 3714 * @phydev: pointer to the PHY device we set the upstream of. 3715 * @port: The phy_port upstream of this PHY, can be NULL. 3716 */ 3717 void phy_set_upstream_port(struct phy_device *phydev, struct phy_port *port) 3718 { 3719 struct phy_port *local_port; 3720 3721 ASSERT_RTNL(); 3722 3723 phydev->upstream_port = port; 3724 3725 phy_for_each_port(phydev, local_port) 3726 local_port->upstream_port = port; 3727 } 3728 EXPORT_SYMBOL_GPL(phy_set_upstream_port); 3729 3730 /** 3731 * fwnode_mdio_find_device - Given a fwnode, find the mdio_device 3732 * @fwnode: pointer to the mdio_device's fwnode 3733 * 3734 * If successful, returns a pointer to the mdio_device with the embedded 3735 * struct device refcount incremented by one, or NULL on failure. 3736 * The caller should call put_device() on the mdio_device after its use. 3737 */ 3738 struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode) 3739 { 3740 struct device *d; 3741 3742 if (!fwnode) 3743 return NULL; 3744 3745 d = bus_find_device_by_fwnode(&mdio_bus_type, fwnode); 3746 if (!d) 3747 return NULL; 3748 3749 return to_mdio_device(d); 3750 } 3751 EXPORT_SYMBOL(fwnode_mdio_find_device); 3752 3753 /** 3754 * fwnode_phy_find_device - For provided phy_fwnode, find phy_device. 3755 * 3756 * @phy_fwnode: Pointer to the phy's fwnode. 3757 * 3758 * If successful, returns a pointer to the phy_device with the embedded 3759 * struct device refcount incremented by one, or NULL on failure. 3760 */ 3761 struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode) 3762 { 3763 struct mdio_device *mdiodev; 3764 3765 mdiodev = fwnode_mdio_find_device(phy_fwnode); 3766 if (!mdiodev) 3767 return NULL; 3768 3769 if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY) 3770 return to_phy_device(&mdiodev->dev); 3771 3772 put_device(&mdiodev->dev); 3773 3774 return NULL; 3775 } 3776 EXPORT_SYMBOL(fwnode_phy_find_device); 3777 3778 /** 3779 * fwnode_get_phy_node - Get the phy_node using the named reference. 3780 * @fwnode: Pointer to fwnode from which phy_node has to be obtained. 3781 * 3782 * Refer return conditions of fwnode_find_reference(). 3783 * For ACPI, only "phy-handle" is supported. Legacy DT properties "phy" 3784 * and "phy-device" are not supported in ACPI. DT supports all the three 3785 * named references to the phy node. 3786 */ 3787 struct fwnode_handle *fwnode_get_phy_node(const struct fwnode_handle *fwnode) 3788 { 3789 struct fwnode_handle *phy_node; 3790 3791 /* Only phy-handle is used for ACPI */ 3792 phy_node = fwnode_find_reference(fwnode, "phy-handle", 0); 3793 if (!IS_ERR(phy_node) || is_acpi_node(fwnode)) 3794 return phy_node; 3795 phy_node = fwnode_find_reference(fwnode, "phy", 0); 3796 if (!IS_ERR(phy_node)) 3797 return phy_node; 3798 return fwnode_find_reference(fwnode, "phy-device", 0); 3799 } 3800 EXPORT_SYMBOL_GPL(fwnode_get_phy_node); 3801 3802 /** 3803 * phy_probe - probe and init a PHY device 3804 * @dev: device to probe and init 3805 * 3806 * Take care of setting up the phy_device structure, set the state to READY. 3807 */ 3808 static int phy_probe(struct device *dev) 3809 { 3810 struct phy_device *phydev = to_phy_device(dev); 3811 struct device_driver *drv = phydev->mdio.dev.driver; 3812 struct phy_driver *phydrv = to_phy_driver(drv); 3813 int err = 0; 3814 3815 phydev->drv = phydrv; 3816 3817 /* Disable the interrupt if the PHY doesn't support it 3818 * but the interrupt is still a valid one 3819 */ 3820 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev)) 3821 phydev->irq = PHY_POLL; 3822 3823 if (phydrv->flags & PHY_IS_INTERNAL) 3824 phydev->is_internal = true; 3825 3826 /* Deassert the reset signal */ 3827 phy_device_reset(phydev, 0); 3828 3829 if (phydev->drv->probe) { 3830 err = phydev->drv->probe(phydev); 3831 if (err) 3832 goto out_reset; 3833 } 3834 3835 phy_disable_interrupts(phydev); 3836 3837 /* Start out supporting everything. Eventually, 3838 * a controller will attach, and may modify one 3839 * or both of these values 3840 */ 3841 if (phydrv->features) { 3842 linkmode_copy(phydev->supported, phydrv->features); 3843 genphy_c45_read_eee_abilities(phydev); 3844 } 3845 else if (phydrv->get_features) 3846 err = phydrv->get_features(phydev); 3847 else if (phydev->is_c45) 3848 err = genphy_c45_pma_read_abilities(phydev); 3849 else 3850 err = genphy_read_abilities(phydev); 3851 3852 if (err) 3853 goto out_remove; 3854 3855 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 3856 phydev->supported)) 3857 phydev->autoneg = 0; 3858 3859 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 3860 phydev->supported)) 3861 phydev->is_gigabit_capable = 1; 3862 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 3863 phydev->supported)) 3864 phydev->is_gigabit_capable = 1; 3865 3866 of_set_phy_supported(phydev); 3867 3868 err = phy_setup_ports(phydev); 3869 if (err) 3870 goto out_remove; 3871 3872 phy_advertise_supported(phydev); 3873 3874 /* Get PHY default EEE advertising modes and handle them as potentially 3875 * safe initial configuration. 3876 */ 3877 err = genphy_c45_read_eee_adv(phydev, phydev->advertising_eee); 3878 if (err) 3879 goto out_sfp_release; 3880 3881 /* Get the EEE modes we want to prohibit. */ 3882 of_set_phy_eee_broken(phydev); 3883 3884 /* Some PHYs may advertise, by default, not support EEE modes. So, 3885 * we need to clean them. In addition remove all disabled EEE modes. 3886 */ 3887 linkmode_and(phydev->advertising_eee, phydev->supported_eee, 3888 phydev->advertising_eee); 3889 linkmode_andnot(phydev->advertising_eee, phydev->advertising_eee, 3890 phydev->eee_disabled_modes); 3891 3892 /* There is no "enabled" flag. If PHY is advertising, assume it is 3893 * kind of enabled. 3894 */ 3895 phydev->eee_cfg.eee_enabled = !linkmode_empty(phydev->advertising_eee); 3896 3897 /* Get master/slave strap overrides */ 3898 of_set_phy_timing_role(phydev); 3899 3900 /* The Pause Frame bits indicate that the PHY can support passing 3901 * pause frames. During autonegotiation, the PHYs will determine if 3902 * they should allow pause frames to pass. The MAC driver should then 3903 * use that result to determine whether to enable flow control via 3904 * pause frames. 3905 * 3906 * Normally, PHY drivers should not set the Pause bits, and instead 3907 * allow phylib to do that. However, there may be some situations 3908 * (e.g. hardware erratum) where the driver wants to set only one 3909 * of these bits. 3910 */ 3911 if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) && 3912 !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) { 3913 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 3914 phydev->supported); 3915 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 3916 phydev->supported); 3917 } 3918 3919 /* Register the PHY LED triggers */ 3920 if (!phydev->is_on_sfp_module) 3921 phy_led_triggers_register(phydev); 3922 3923 /* Get the LEDs from the device tree, and instantiate standard 3924 * LEDs for them. 3925 */ 3926 if (IS_ENABLED(CONFIG_PHYLIB_LEDS) && !phy_driver_is_genphy(phydev)) { 3927 err = of_phy_leds(phydev); 3928 if (err) 3929 goto out_unreg_led_triggers; 3930 } 3931 3932 /* Set the state to READY by default */ 3933 phydev->state = PHY_READY; 3934 3935 return 0; 3936 3937 out_unreg_led_triggers: 3938 if (!phydev->is_on_sfp_module) 3939 phy_led_triggers_unregister(phydev); 3940 3941 out_sfp_release: 3942 phy_sfp_release(phydev); 3943 phy_cleanup_ports(phydev); 3944 3945 out_remove: 3946 if (phydev->drv->remove) 3947 phydev->drv->remove(phydev); 3948 3949 out_reset: 3950 /* Re-assert the reset signal on error */ 3951 phy_device_reset(phydev, 1); 3952 3953 return err; 3954 } 3955 3956 static int phy_remove(struct device *dev) 3957 { 3958 struct phy_device *phydev = to_phy_device(dev); 3959 3960 cancel_delayed_work_sync(&phydev->state_queue); 3961 3962 if (IS_ENABLED(CONFIG_PHYLIB_LEDS) && !phy_driver_is_genphy(phydev)) 3963 phy_leds_unregister(phydev); 3964 3965 if (!phydev->is_on_sfp_module) 3966 phy_led_triggers_unregister(phydev); 3967 3968 phydev->state = PHY_DOWN; 3969 3970 phy_sfp_release(phydev); 3971 phy_cleanup_ports(phydev); 3972 3973 if (phydev->drv && phydev->drv->remove) 3974 phydev->drv->remove(phydev); 3975 3976 /* Assert the reset signal */ 3977 phy_device_reset(phydev, 1); 3978 3979 phydev->drv = NULL; 3980 3981 return 0; 3982 } 3983 3984 /** 3985 * phy_driver_register - register a phy_driver with the PHY layer 3986 * @new_driver: new phy_driver to register 3987 * @owner: module owning this PHY 3988 */ 3989 static int phy_driver_register(struct phy_driver *new_driver, 3990 struct module *owner) 3991 { 3992 int retval; 3993 3994 /* Either the features are hard coded, or dynamically 3995 * determined. It cannot be both. 3996 */ 3997 if (WARN_ON(new_driver->features && new_driver->get_features)) { 3998 pr_err("%s: features and get_features must not both be set\n", 3999 new_driver->name); 4000 return -EINVAL; 4001 } 4002 4003 /* PHYLIB device drivers must not match using a DT compatible table 4004 * as this bypasses our checks that the mdiodev that is being matched 4005 * is backed by a struct phy_device. If such a case happens, we will 4006 * make out-of-bounds accesses and lockup in phydev->lock. 4007 */ 4008 if (WARN(new_driver->mdiodrv.driver.of_match_table, 4009 "%s: driver must not provide a DT match table\n", 4010 new_driver->name)) 4011 return -EINVAL; 4012 4013 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY; 4014 new_driver->mdiodrv.driver.name = new_driver->name; 4015 new_driver->mdiodrv.driver.bus = &mdio_bus_type; 4016 new_driver->mdiodrv.driver.probe = phy_probe; 4017 new_driver->mdiodrv.driver.remove = phy_remove; 4018 new_driver->mdiodrv.driver.owner = owner; 4019 new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS; 4020 4021 retval = driver_register(&new_driver->mdiodrv.driver); 4022 if (retval) { 4023 pr_err("%s: Error %d in registering driver\n", 4024 new_driver->name, retval); 4025 4026 return retval; 4027 } 4028 4029 pr_debug("%s: Registered new driver\n", new_driver->name); 4030 4031 return 0; 4032 } 4033 4034 static void phy_driver_unregister(struct phy_driver *drv) 4035 { 4036 driver_unregister(&drv->mdiodrv.driver); 4037 } 4038 4039 int phy_drivers_register(struct phy_driver *new_driver, int n, 4040 struct module *owner) 4041 { 4042 int i, ret = 0; 4043 4044 for (i = 0; i < n; i++) { 4045 ret = phy_driver_register(new_driver + i, owner); 4046 if (ret) { 4047 while (i-- > 0) 4048 phy_driver_unregister(new_driver + i); 4049 break; 4050 } 4051 } 4052 return ret; 4053 } 4054 EXPORT_SYMBOL(phy_drivers_register); 4055 4056 void phy_drivers_unregister(struct phy_driver *drv, int n) 4057 { 4058 int i; 4059 4060 for (i = 0; i < n; i++) 4061 phy_driver_unregister(drv + i); 4062 } 4063 EXPORT_SYMBOL(phy_drivers_unregister); 4064 4065 static struct phy_driver genphy_driver = { 4066 .phy_id = 0xffffffff, 4067 .phy_id_mask = 0xffffffff, 4068 .name = "Generic PHY", 4069 .get_features = genphy_read_abilities, 4070 .suspend = genphy_suspend, 4071 .resume = genphy_resume, 4072 .set_loopback = genphy_loopback, 4073 }; 4074 4075 static const struct ethtool_phy_ops phy_ethtool_phy_ops = { 4076 .get_sset_count = phy_ethtool_get_sset_count, 4077 .get_strings = phy_ethtool_get_strings, 4078 .get_stats = phy_ethtool_get_stats, 4079 .get_plca_cfg = phy_ethtool_get_plca_cfg, 4080 .set_plca_cfg = phy_ethtool_set_plca_cfg, 4081 .get_plca_status = phy_ethtool_get_plca_status, 4082 .start_cable_test = phy_start_cable_test, 4083 .start_cable_test_tdr = phy_start_cable_test_tdr, 4084 }; 4085 4086 static const struct phylib_stubs __phylib_stubs = { 4087 .hwtstamp_get = __phy_hwtstamp_get, 4088 .hwtstamp_set = __phy_hwtstamp_set, 4089 .get_phy_stats = __phy_ethtool_get_phy_stats, 4090 .get_link_ext_stats = __phy_ethtool_get_link_ext_stats, 4091 }; 4092 4093 static void phylib_register_stubs(void) 4094 { 4095 phylib_stubs = &__phylib_stubs; 4096 } 4097 4098 static void phylib_unregister_stubs(void) 4099 { 4100 phylib_stubs = NULL; 4101 } 4102 4103 static int __init phy_init(void) 4104 { 4105 int rc; 4106 4107 rc = class_register(&mdio_bus_class); 4108 if (rc) 4109 return rc; 4110 4111 rc = bus_register(&mdio_bus_type); 4112 if (rc) 4113 goto err_class; 4114 4115 rtnl_lock(); 4116 ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops); 4117 phylib_register_stubs(); 4118 rtnl_unlock(); 4119 4120 rc = phy_caps_init(); 4121 if (rc) 4122 goto err_ethtool_phy_ops; 4123 4124 features_init(); 4125 4126 rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE); 4127 if (rc) 4128 goto err_ethtool_phy_ops; 4129 4130 rc = phy_driver_register(&genphy_driver, THIS_MODULE); 4131 if (rc) 4132 goto err_c45; 4133 4134 return 0; 4135 4136 err_c45: 4137 phy_driver_unregister(&genphy_c45_driver); 4138 err_ethtool_phy_ops: 4139 rtnl_lock(); 4140 phylib_unregister_stubs(); 4141 ethtool_set_ethtool_phy_ops(NULL); 4142 rtnl_unlock(); 4143 bus_unregister(&mdio_bus_type); 4144 err_class: 4145 class_unregister(&mdio_bus_class); 4146 4147 return rc; 4148 } 4149 4150 static void __exit phy_exit(void) 4151 { 4152 phy_driver_unregister(&genphy_c45_driver); 4153 phy_driver_unregister(&genphy_driver); 4154 rtnl_lock(); 4155 phylib_unregister_stubs(); 4156 ethtool_set_ethtool_phy_ops(NULL); 4157 rtnl_unlock(); 4158 bus_unregister(&mdio_bus_type); 4159 class_unregister(&mdio_bus_class); 4160 } 4161 4162 subsys_initcall(phy_init); 4163 module_exit(phy_exit); 4164