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