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 (ret == -EIO || 931 ret == -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 /* Re-apply autonomous EEE disable after soft reset */ 1379 if (phydev->autonomous_eee_disabled && 1380 phydev->drv->disable_autonomous_eee) { 1381 ret = phydev->drv->disable_autonomous_eee(phydev); 1382 if (ret) 1383 return ret; 1384 } 1385 1386 return 0; 1387 } 1388 EXPORT_SYMBOL(phy_init_hw); 1389 1390 void phy_attached_info(struct phy_device *phydev) 1391 { 1392 phy_attached_print(phydev, NULL); 1393 } 1394 EXPORT_SYMBOL(phy_attached_info); 1395 1396 #define ATTACHED_FMT "attached PHY driver %s(mii_bus:phy_addr=%s, irq=%s)" 1397 char *phy_attached_info_irq(struct phy_device *phydev) 1398 { 1399 char *irq_str; 1400 char irq_num[8]; 1401 1402 switch(phydev->irq) { 1403 case PHY_POLL: 1404 irq_str = "POLL"; 1405 break; 1406 case PHY_MAC_INTERRUPT: 1407 irq_str = "MAC"; 1408 break; 1409 default: 1410 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq); 1411 irq_str = irq_num; 1412 break; 1413 } 1414 1415 return kasprintf(GFP_KERNEL, "%s", irq_str); 1416 } 1417 EXPORT_SYMBOL(phy_attached_info_irq); 1418 1419 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...) 1420 { 1421 const char *unbound = phydev->drv ? "" : "[unbound] "; 1422 char *irq_str = phy_attached_info_irq(phydev); 1423 1424 if (!fmt) { 1425 phydev_info(phydev, ATTACHED_FMT "\n", unbound, 1426 phydev_name(phydev), irq_str); 1427 } else { 1428 va_list ap; 1429 1430 phydev_info(phydev, ATTACHED_FMT, unbound, 1431 phydev_name(phydev), irq_str); 1432 1433 va_start(ap, fmt); 1434 vprintk(fmt, ap); 1435 va_end(ap); 1436 } 1437 kfree(irq_str); 1438 } 1439 EXPORT_SYMBOL(phy_attached_print); 1440 1441 static void phy_sysfs_create_links(struct phy_device *phydev) 1442 { 1443 struct net_device *dev = phydev->attached_dev; 1444 int err; 1445 1446 if (!dev) 1447 return; 1448 1449 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj, 1450 "attached_dev"); 1451 if (err) 1452 return; 1453 1454 err = sysfs_create_link_nowarn(&dev->dev.kobj, 1455 &phydev->mdio.dev.kobj, 1456 "phydev"); 1457 if (err) { 1458 dev_err(&dev->dev, "could not add device link to %s err %d\n", 1459 kobject_name(&phydev->mdio.dev.kobj), 1460 err); 1461 /* non-fatal - some net drivers can use one netdevice 1462 * with more then one phy 1463 */ 1464 } 1465 1466 phydev->sysfs_links = true; 1467 } 1468 1469 static ssize_t 1470 phy_standalone_show(struct device *dev, struct device_attribute *attr, 1471 char *buf) 1472 { 1473 struct phy_device *phydev = to_phy_device(dev); 1474 1475 return sysfs_emit(buf, "%d\n", !phydev->attached_dev); 1476 } 1477 static DEVICE_ATTR_RO(phy_standalone); 1478 1479 /** 1480 * phy_sfp_connect_phy - Connect the SFP module's PHY to the upstream PHY 1481 * @upstream: pointer to the upstream phy device 1482 * @phy: pointer to the SFP module's phy device 1483 * 1484 * This helper allows keeping track of PHY devices on the link. It adds the 1485 * SFP module's phy to the phy namespace of the upstream phy 1486 * 1487 * Return: 0 on success, otherwise a negative error code. 1488 */ 1489 static int phy_sfp_connect_phy(void *upstream, struct phy_device *phy) 1490 { 1491 struct phy_device *phydev = upstream; 1492 struct net_device *dev = phydev->attached_dev; 1493 1494 if (dev) 1495 return phy_link_topo_add_phy(dev, phy, PHY_UPSTREAM_PHY, phydev); 1496 1497 return 0; 1498 } 1499 1500 /** 1501 * phy_sfp_disconnect_phy - Disconnect the SFP module's PHY from the upstream PHY 1502 * @upstream: pointer to the upstream phy device 1503 * @phy: pointer to the SFP module's phy device 1504 * 1505 * This helper allows keeping track of PHY devices on the link. It removes the 1506 * SFP module's phy to the phy namespace of the upstream phy. As the module phy 1507 * will be destroyed, re-inserting the same module will add a new phy with a 1508 * new index. 1509 */ 1510 static void phy_sfp_disconnect_phy(void *upstream, struct phy_device *phy) 1511 { 1512 struct phy_device *phydev = upstream; 1513 struct net_device *dev = phydev->attached_dev; 1514 1515 if (dev) 1516 phy_link_topo_del_phy(dev, phy); 1517 } 1518 1519 /** 1520 * phy_sfp_attach - attach the SFP bus to the PHY upstream network device 1521 * @upstream: pointer to the phy device 1522 * @bus: sfp bus representing cage being attached 1523 * 1524 * This is used to fill in the sfp_upstream_ops .attach member. 1525 */ 1526 static void phy_sfp_attach(void *upstream, struct sfp_bus *bus) 1527 { 1528 struct phy_device *phydev = upstream; 1529 1530 if (phydev->attached_dev) 1531 phydev->attached_dev->sfp_bus = bus; 1532 phydev->sfp_bus_attached = true; 1533 } 1534 1535 /** 1536 * phy_sfp_detach - detach the SFP bus from the PHY upstream network device 1537 * @upstream: pointer to the phy device 1538 * @bus: sfp bus representing cage being attached 1539 * 1540 * This is used to fill in the sfp_upstream_ops .detach member. 1541 */ 1542 static void phy_sfp_detach(void *upstream, struct sfp_bus *bus) 1543 { 1544 struct phy_device *phydev = upstream; 1545 1546 if (phydev->attached_dev) 1547 phydev->attached_dev->sfp_bus = NULL; 1548 phydev->sfp_bus_attached = false; 1549 } 1550 1551 static int phy_sfp_module_insert(void *upstream, const struct sfp_eeprom_id *id) 1552 { 1553 __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support); 1554 struct phy_device *phydev = upstream; 1555 const struct sfp_module_caps *caps; 1556 struct phy_port *port; 1557 1558 phy_interface_t iface; 1559 1560 linkmode_zero(sfp_support); 1561 1562 port = phy_get_sfp_port(phydev); 1563 if (!port) 1564 return -EINVAL; 1565 1566 caps = sfp_get_module_caps(phydev->sfp_bus); 1567 1568 linkmode_and(sfp_support, port->supported, caps->link_modes); 1569 if (linkmode_empty(sfp_support)) { 1570 dev_err(&phydev->mdio.dev, "incompatible SFP module inserted, no common linkmode\n"); 1571 return -EINVAL; 1572 } 1573 1574 iface = sfp_select_interface(phydev->sfp_bus, sfp_support); 1575 if (iface == PHY_INTERFACE_MODE_NA) { 1576 dev_err(&phydev->mdio.dev, "PHY %s does not support the SFP module's requested MII interfaces\n", 1577 phydev_name(phydev)); 1578 return -EINVAL; 1579 } 1580 1581 if (phydev->n_ports == 1) 1582 phydev->port = caps->port; 1583 1584 if (port->ops && port->ops->configure_mii) 1585 return port->ops->configure_mii(port, true, iface); 1586 1587 return 0; 1588 } 1589 1590 static void phy_sfp_module_remove(void *upstream) 1591 { 1592 struct phy_device *phydev = upstream; 1593 struct phy_port *port = phy_get_sfp_port(phydev); 1594 1595 if (port && port->ops && port->ops->configure_mii) 1596 port->ops->configure_mii(port, false, PHY_INTERFACE_MODE_NA); 1597 1598 if (phydev->n_ports == 1) 1599 phydev->port = PORT_NONE; 1600 } 1601 1602 static void phy_sfp_link_up(void *upstream) 1603 { 1604 struct phy_device *phydev = upstream; 1605 struct phy_port *port = phy_get_sfp_port(phydev); 1606 1607 if (port && port->ops && port->ops->link_up) 1608 port->ops->link_up(port); 1609 } 1610 1611 static void phy_sfp_link_down(void *upstream) 1612 { 1613 struct phy_device *phydev = upstream; 1614 struct phy_port *port = phy_get_sfp_port(phydev); 1615 1616 if (port && port->ops && port->ops->link_down) 1617 port->ops->link_down(port); 1618 } 1619 1620 static const struct sfp_upstream_ops sfp_phydev_ops = { 1621 .attach = phy_sfp_attach, 1622 .detach = phy_sfp_detach, 1623 .module_insert = phy_sfp_module_insert, 1624 .module_remove = phy_sfp_module_remove, 1625 .link_up = phy_sfp_link_up, 1626 .link_down = phy_sfp_link_down, 1627 .connect_phy = phy_sfp_connect_phy, 1628 .disconnect_phy = phy_sfp_disconnect_phy, 1629 }; 1630 1631 static int phy_add_port(struct phy_device *phydev, struct phy_port *port) 1632 { 1633 int ret = 0; 1634 1635 if (phydev->n_ports == phydev->max_n_ports) 1636 return -EBUSY; 1637 1638 /* We set all ports as active by default, PHY drivers may deactivate 1639 * them (when unused) 1640 */ 1641 port->active = true; 1642 1643 if (port->is_mii) { 1644 if (phydev->drv && phydev->drv->attach_mii_port) 1645 ret = phydev->drv->attach_mii_port(phydev, port); 1646 } else { 1647 if (phydev->drv && phydev->drv->attach_mdi_port) 1648 ret = phydev->drv->attach_mdi_port(phydev, port); 1649 } 1650 1651 if (ret) 1652 return ret; 1653 1654 /* The PHY driver might have added, removed or set medium/pairs info, 1655 * so update the port supported accordingly. 1656 */ 1657 phy_port_update_supported(port); 1658 1659 list_add(&port->head, &phydev->ports); 1660 1661 phydev->n_ports++; 1662 1663 return 0; 1664 } 1665 1666 static void phy_del_port(struct phy_device *phydev, struct phy_port *port) 1667 { 1668 if (!phydev->n_ports) 1669 return; 1670 1671 list_del(&port->head); 1672 1673 phydev->n_ports--; 1674 } 1675 1676 static int phy_setup_sfp_port(struct phy_device *phydev) 1677 { 1678 struct phy_port *port = phy_port_alloc(); 1679 int ret; 1680 1681 if (!port) 1682 return -ENOMEM; 1683 1684 port->parent_type = PHY_PORT_PHY; 1685 port->phy = phydev; 1686 1687 /* The PHY is a media converter, the port connected to the SFP cage 1688 * is a MII port. 1689 */ 1690 port->is_mii = true; 1691 port->is_sfp = true; 1692 1693 /* The port->supported and port->interfaces list will be populated 1694 * when attaching the port to the phydev. 1695 */ 1696 ret = phy_add_port(phydev, port); 1697 if (ret) 1698 phy_port_destroy(port); 1699 1700 return ret; 1701 } 1702 1703 /** 1704 * phy_sfp_probe - probe for a SFP cage attached to this PHY device 1705 * @phydev: Pointer to phy_device 1706 */ 1707 static int phy_sfp_probe(struct phy_device *phydev) 1708 { 1709 struct sfp_bus *bus; 1710 int ret = 0; 1711 1712 if (phydev->mdio.dev.fwnode) { 1713 bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode); 1714 if (IS_ERR(bus)) 1715 return PTR_ERR(bus); 1716 1717 phydev->sfp_bus = bus; 1718 1719 ret = sfp_bus_add_upstream(bus, phydev, &sfp_phydev_ops); 1720 sfp_bus_put(bus); 1721 1722 if (ret) 1723 phydev->sfp_bus = NULL; 1724 } 1725 1726 if (!ret && phydev->sfp_bus) 1727 ret = phy_setup_sfp_port(phydev); 1728 1729 return ret; 1730 } 1731 1732 static bool phy_drv_supports_irq(const struct phy_driver *phydrv) 1733 { 1734 return phydrv->config_intr && phydrv->handle_interrupt; 1735 } 1736 1737 /** 1738 * phy_attach_direct - attach a network device to a given PHY device pointer 1739 * @dev: network device to attach 1740 * @phydev: Pointer to phy_device to attach 1741 * @flags: PHY device's dev_flags 1742 * @interface: PHY device's interface 1743 * 1744 * Description: Called by drivers to attach to a particular PHY 1745 * device. The phy_device is found, and properly hooked up 1746 * to the phy_driver. If no driver is attached, then a 1747 * generic driver is used. The phy_device is given a ptr to 1748 * the attaching device, and given a callback for link status 1749 * change. The phy_device is returned to the attaching driver. 1750 * This function takes a reference on the phy device. 1751 */ 1752 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, 1753 u32 flags, phy_interface_t interface) 1754 { 1755 struct mii_bus *bus = phydev->mdio.bus; 1756 struct device *d = &phydev->mdio.dev; 1757 struct module *ndev_owner = NULL; 1758 int err; 1759 1760 /* For Ethernet device drivers that register their own MDIO bus, we 1761 * will have bus->owner match ndev_mod, so we do not want to increment 1762 * our own module->refcnt here, otherwise we would not be able to 1763 * unload later on. 1764 */ 1765 if (dev) 1766 ndev_owner = dev->dev.parent->driver->owner; 1767 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) { 1768 phydev_err(phydev, "failed to get the bus module\n"); 1769 return -EIO; 1770 } 1771 1772 get_device(d); 1773 1774 /* Assume that if there is no driver, that it doesn't 1775 * exist, and we should use the genphy driver. 1776 */ 1777 if (!d->driver) { 1778 if (phydev->is_c45) 1779 d->driver = &genphy_c45_driver.mdiodrv.driver; 1780 else 1781 d->driver = &genphy_driver.mdiodrv.driver; 1782 1783 phydev->is_genphy_driven = 1; 1784 } 1785 1786 if (!try_module_get(d->driver->owner)) { 1787 phydev_err(phydev, "failed to get the device driver module\n"); 1788 err = -EIO; 1789 goto error_put_device; 1790 } 1791 1792 if (phydev->is_genphy_driven) { 1793 err = d->driver->probe(d); 1794 if (err >= 0) 1795 err = device_bind_driver(d); 1796 1797 if (err) 1798 goto error_module_put; 1799 } 1800 1801 if (phydev->attached_dev) { 1802 dev_err(&dev->dev, "PHY already attached\n"); 1803 err = -EBUSY; 1804 goto error; 1805 } 1806 1807 phydev->phy_link_change = phy_link_change; 1808 if (dev) { 1809 phydev->attached_dev = dev; 1810 dev->phydev = phydev; 1811 1812 if (phydev->sfp_bus_attached) 1813 dev->sfp_bus = phydev->sfp_bus; 1814 1815 err = phy_link_topo_add_phy(dev, phydev, PHY_UPSTREAM_MAC, dev); 1816 if (err) 1817 goto error; 1818 } 1819 1820 /* Some Ethernet drivers try to connect to a PHY device before 1821 * calling register_netdevice() -> netdev_register_kobject() and 1822 * does the dev->dev.kobj initialization. Here we only check for 1823 * success which indicates that the network device kobject is 1824 * ready. Once we do that we still need to keep track of whether 1825 * links were successfully set up or not for phy_detach() to 1826 * remove them accordingly. 1827 */ 1828 phydev->sysfs_links = false; 1829 1830 phy_sysfs_create_links(phydev); 1831 1832 if (!phydev->attached_dev) { 1833 err = sysfs_create_file(&phydev->mdio.dev.kobj, 1834 &dev_attr_phy_standalone.attr); 1835 if (err) 1836 phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n"); 1837 } 1838 1839 phydev->dev_flags |= flags; 1840 1841 phydev->interface = interface; 1842 1843 phydev->state = PHY_READY; 1844 1845 phydev->interrupts = PHY_INTERRUPT_DISABLED; 1846 1847 /* PHYs can request to use poll mode even though they have an 1848 * associated interrupt line. This could be the case if they 1849 * detect a broken interrupt handling. 1850 */ 1851 if (phydev->dev_flags & PHY_F_NO_IRQ) 1852 phydev->irq = PHY_POLL; 1853 1854 if (!phy_drv_supports_irq(phydev->drv) && phy_interrupt_is_valid(phydev)) 1855 phydev->irq = PHY_POLL; 1856 1857 /* Port is set to PORT_TP by default and the actual PHY driver will set 1858 * it to different value depending on the PHY configuration. If we have 1859 * the generic PHY driver we can't figure it out, thus set the old 1860 * legacy PORT_MII value. 1861 */ 1862 if (phydev->is_genphy_driven) 1863 phydev->port = PORT_MII; 1864 1865 /* Initial carrier state is off as the phy is about to be 1866 * (re)initialized. 1867 */ 1868 if (dev) 1869 netif_carrier_off(phydev->attached_dev); 1870 1871 /* Do initial configuration here, now that 1872 * we have certain key parameters 1873 * (dev_flags and interface) 1874 */ 1875 err = phy_init_hw(phydev); 1876 if (err) 1877 goto error; 1878 1879 phy_resume(phydev); 1880 1881 /** 1882 * If the external phy used by current mac interface is managed by 1883 * another mac interface, so we should create a device link between 1884 * phy dev and mac dev. 1885 */ 1886 if (dev && phydev->mdio.bus->parent && dev->dev.parent != phydev->mdio.bus->parent) 1887 phydev->devlink = device_link_add(dev->dev.parent, &phydev->mdio.dev, 1888 DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS); 1889 1890 return err; 1891 1892 error: 1893 /* phy_detach() does all of the cleanup below */ 1894 phy_detach(phydev); 1895 return err; 1896 1897 error_module_put: 1898 module_put(d->driver->owner); 1899 phydev->is_genphy_driven = 0; 1900 d->driver = NULL; 1901 error_put_device: 1902 put_device(d); 1903 if (ndev_owner != bus->owner) 1904 module_put(bus->owner); 1905 return err; 1906 } 1907 EXPORT_SYMBOL(phy_attach_direct); 1908 1909 /** 1910 * phy_detach - detach a PHY device from its network device 1911 * @phydev: target phy_device struct 1912 * 1913 * This detaches the phy device from its network device and the phy 1914 * driver, and drops the reference count taken in phy_attach_direct(). 1915 */ 1916 void phy_detach(struct phy_device *phydev) 1917 { 1918 struct net_device *dev = phydev->attached_dev; 1919 struct module *ndev_owner = NULL; 1920 struct mii_bus *bus; 1921 1922 if (phydev->devlink) { 1923 device_link_del(phydev->devlink); 1924 phydev->devlink = NULL; 1925 } 1926 1927 if (phydev->sysfs_links) { 1928 if (dev) 1929 sysfs_remove_link(&dev->dev.kobj, "phydev"); 1930 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev"); 1931 } 1932 1933 if (!phydev->attached_dev) 1934 sysfs_remove_file(&phydev->mdio.dev.kobj, 1935 &dev_attr_phy_standalone.attr); 1936 1937 phy_suspend(phydev); 1938 if (dev) { 1939 struct hwtstamp_provider *hwprov; 1940 1941 /* hwprov may technically be protected by ops lock but 1942 * not for devices with a phydev, see phy_link_topo_add_phy() 1943 */ 1944 hwprov = rtnl_dereference(dev->hwprov); 1945 /* Disable timestamp if it is the one selected */ 1946 if (hwprov && hwprov->phydev == phydev) { 1947 rcu_assign_pointer(dev->hwprov, NULL); 1948 kfree_rcu(hwprov, rcu_head); 1949 } 1950 1951 phydev->attached_dev->phydev = NULL; 1952 phydev->attached_dev = NULL; 1953 phy_link_topo_del_phy(dev, phydev); 1954 } 1955 1956 phydev->phy_link_change = NULL; 1957 phydev->phylink = NULL; 1958 1959 if (phydev->mdio.dev.driver) 1960 module_put(phydev->mdio.dev.driver->owner); 1961 1962 /* If the device had no specific driver before (i.e. - it 1963 * was using the generic driver), we unbind the device 1964 * from the generic driver so that there's a chance a 1965 * real driver could be loaded 1966 */ 1967 if (phydev->is_genphy_driven) { 1968 device_release_driver(&phydev->mdio.dev); 1969 phydev->is_genphy_driven = 0; 1970 } 1971 1972 /* Assert the reset signal */ 1973 phy_device_reset(phydev, 1); 1974 1975 /* 1976 * The phydev might go away on the put_device() below, so avoid 1977 * a use-after-free bug by reading the underlying bus first. 1978 */ 1979 bus = phydev->mdio.bus; 1980 1981 put_device(&phydev->mdio.dev); 1982 if (dev) 1983 ndev_owner = dev->dev.parent->driver->owner; 1984 if (ndev_owner != bus->owner) 1985 module_put(bus->owner); 1986 } 1987 EXPORT_SYMBOL(phy_detach); 1988 1989 int phy_suspend(struct phy_device *phydev) 1990 { 1991 struct net_device *netdev = phydev->attached_dev; 1992 const struct phy_driver *phydrv = phydev->drv; 1993 int ret; 1994 1995 if (phydev->suspended || !phydrv) 1996 return 0; 1997 1998 phydev->wol_enabled = phy_may_wakeup(phydev) || 1999 (netdev && netdev->ethtool->wol_enabled); 2000 /* If the device has WOL enabled, we cannot suspend the PHY */ 2001 if (phydev->wol_enabled && !(phydrv->flags & PHY_ALWAYS_CALL_SUSPEND)) 2002 return -EBUSY; 2003 2004 if (!phydrv->suspend) 2005 return 0; 2006 2007 ret = phydrv->suspend(phydev); 2008 if (!ret) 2009 phydev->suspended = true; 2010 2011 return ret; 2012 } 2013 EXPORT_SYMBOL(phy_suspend); 2014 2015 int __phy_resume(struct phy_device *phydev) 2016 { 2017 const struct phy_driver *phydrv = phydev->drv; 2018 int ret; 2019 2020 lockdep_assert_held(&phydev->lock); 2021 2022 if (!phydrv || !phydrv->resume) 2023 return 0; 2024 2025 ret = phydrv->resume(phydev); 2026 if (!ret) 2027 phydev->suspended = false; 2028 2029 return ret; 2030 } 2031 EXPORT_SYMBOL(__phy_resume); 2032 2033 int phy_resume(struct phy_device *phydev) 2034 { 2035 int ret; 2036 2037 mutex_lock(&phydev->lock); 2038 ret = __phy_resume(phydev); 2039 mutex_unlock(&phydev->lock); 2040 2041 return ret; 2042 } 2043 EXPORT_SYMBOL(phy_resume); 2044 2045 /** 2046 * phy_reset_after_clk_enable - perform a PHY reset if needed 2047 * @phydev: target phy_device struct 2048 * 2049 * Description: Some PHYs are known to need a reset after their refclk was 2050 * enabled. This function evaluates the flags and perform the reset if it's 2051 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy 2052 * was reset. 2053 */ 2054 int phy_reset_after_clk_enable(struct phy_device *phydev) 2055 { 2056 if (!phydev || !phydev->drv) 2057 return -ENODEV; 2058 2059 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) { 2060 phy_device_reset(phydev, 1); 2061 phy_device_reset(phydev, 0); 2062 return 1; 2063 } 2064 2065 return 0; 2066 } 2067 EXPORT_SYMBOL(phy_reset_after_clk_enable); 2068 2069 /* Generic PHY support and helper functions */ 2070 2071 /** 2072 * genphy_config_advert - sanitize and advertise auto-negotiation parameters 2073 * @phydev: target phy_device struct 2074 * @advert: auto-negotiation parameters to advertise 2075 * 2076 * Description: Writes MII_ADVERTISE with the appropriate values, 2077 * after sanitizing the values to make sure we only advertise 2078 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement 2079 * hasn't changed, and > 0 if it has changed. 2080 */ 2081 static int genphy_config_advert(struct phy_device *phydev, 2082 const unsigned long *advert) 2083 { 2084 int err, bmsr, changed = 0; 2085 u32 adv; 2086 2087 adv = linkmode_adv_to_mii_adv_t(advert); 2088 2089 /* Setup standard advertisement */ 2090 err = phy_modify_changed(phydev, MII_ADVERTISE, 2091 ADVERTISE_ALL | ADVERTISE_100BASE4 | 2092 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM, 2093 adv); 2094 if (err < 0) 2095 return err; 2096 if (err > 0) 2097 changed = 1; 2098 2099 bmsr = phy_read(phydev, MII_BMSR); 2100 if (bmsr < 0) 2101 return bmsr; 2102 2103 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all 2104 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a 2105 * logical 1. 2106 */ 2107 if (!(bmsr & BMSR_ESTATEN)) 2108 return changed; 2109 2110 adv = linkmode_adv_to_mii_ctrl1000_t(advert); 2111 2112 err = phy_modify_changed(phydev, MII_CTRL1000, 2113 ADVERTISE_1000FULL | ADVERTISE_1000HALF, 2114 adv); 2115 if (err < 0) 2116 return err; 2117 if (err > 0) 2118 changed = 1; 2119 2120 return changed; 2121 } 2122 2123 /** 2124 * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters 2125 * @phydev: target phy_device struct 2126 * 2127 * Description: Writes MII_ADVERTISE with the appropriate values, 2128 * after sanitizing the values to make sure we only advertise 2129 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement 2130 * hasn't changed, and > 0 if it has changed. This function is intended 2131 * for Clause 37 1000Base-X mode. 2132 */ 2133 static int genphy_c37_config_advert(struct phy_device *phydev) 2134 { 2135 u16 adv = 0; 2136 2137 /* Only allow advertising what this PHY supports */ 2138 linkmode_and(phydev->advertising, phydev->advertising, 2139 phydev->supported); 2140 2141 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 2142 phydev->advertising)) 2143 adv |= ADVERTISE_1000XFULL; 2144 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2145 phydev->advertising)) 2146 adv |= ADVERTISE_1000XPAUSE; 2147 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2148 phydev->advertising)) 2149 adv |= ADVERTISE_1000XPSE_ASYM; 2150 2151 return phy_modify_changed(phydev, MII_ADVERTISE, 2152 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE | 2153 ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM, 2154 adv); 2155 } 2156 2157 /** 2158 * genphy_setup_forced - configures/forces speed/duplex from @phydev 2159 * @phydev: target phy_device struct 2160 * 2161 * Description: Configures MII_BMCR to force speed/duplex 2162 * to the values in phydev. Assumes that the values are valid. 2163 * Please see phy_sanitize_settings(). 2164 */ 2165 int genphy_setup_forced(struct phy_device *phydev) 2166 { 2167 u16 ctl; 2168 2169 phydev->pause = false; 2170 phydev->asym_pause = false; 2171 2172 ctl = mii_bmcr_encode_fixed(phydev->speed, phydev->duplex); 2173 2174 return phy_modify(phydev, MII_BMCR, 2175 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl); 2176 } 2177 EXPORT_SYMBOL(genphy_setup_forced); 2178 2179 static int genphy_setup_master_slave(struct phy_device *phydev) 2180 { 2181 u16 ctl = 0; 2182 2183 if (!phydev->is_gigabit_capable) 2184 return 0; 2185 2186 switch (phydev->master_slave_set) { 2187 case MASTER_SLAVE_CFG_MASTER_PREFERRED: 2188 ctl |= CTL1000_PREFER_MASTER; 2189 break; 2190 case MASTER_SLAVE_CFG_SLAVE_PREFERRED: 2191 break; 2192 case MASTER_SLAVE_CFG_MASTER_FORCE: 2193 ctl |= CTL1000_AS_MASTER; 2194 fallthrough; 2195 case MASTER_SLAVE_CFG_SLAVE_FORCE: 2196 ctl |= CTL1000_ENABLE_MASTER; 2197 break; 2198 case MASTER_SLAVE_CFG_UNKNOWN: 2199 case MASTER_SLAVE_CFG_UNSUPPORTED: 2200 return 0; 2201 default: 2202 phydev_warn(phydev, "Unsupported Master/Slave mode\n"); 2203 return -EOPNOTSUPP; 2204 } 2205 2206 return phy_modify_changed(phydev, MII_CTRL1000, 2207 (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER | 2208 CTL1000_PREFER_MASTER), ctl); 2209 } 2210 2211 int genphy_read_master_slave(struct phy_device *phydev) 2212 { 2213 int cfg, state; 2214 int val; 2215 2216 phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN; 2217 phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN; 2218 2219 val = phy_read(phydev, MII_CTRL1000); 2220 if (val < 0) 2221 return val; 2222 2223 if (val & CTL1000_ENABLE_MASTER) { 2224 if (val & CTL1000_AS_MASTER) 2225 cfg = MASTER_SLAVE_CFG_MASTER_FORCE; 2226 else 2227 cfg = MASTER_SLAVE_CFG_SLAVE_FORCE; 2228 } else { 2229 if (val & CTL1000_PREFER_MASTER) 2230 cfg = MASTER_SLAVE_CFG_MASTER_PREFERRED; 2231 else 2232 cfg = MASTER_SLAVE_CFG_SLAVE_PREFERRED; 2233 } 2234 2235 val = phy_read(phydev, MII_STAT1000); 2236 if (val < 0) 2237 return val; 2238 2239 if (val & LPA_1000MSFAIL) { 2240 state = MASTER_SLAVE_STATE_ERR; 2241 } else if (phydev->link) { 2242 /* this bits are valid only for active link */ 2243 if (val & LPA_1000MSRES) 2244 state = MASTER_SLAVE_STATE_MASTER; 2245 else 2246 state = MASTER_SLAVE_STATE_SLAVE; 2247 } else { 2248 state = MASTER_SLAVE_STATE_UNKNOWN; 2249 } 2250 2251 phydev->master_slave_get = cfg; 2252 phydev->master_slave_state = state; 2253 2254 return 0; 2255 } 2256 EXPORT_SYMBOL(genphy_read_master_slave); 2257 2258 /** 2259 * genphy_restart_aneg - Enable and Restart Autonegotiation 2260 * @phydev: target phy_device struct 2261 */ 2262 int genphy_restart_aneg(struct phy_device *phydev) 2263 { 2264 /* Don't isolate the PHY if we're negotiating */ 2265 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, 2266 BMCR_ANENABLE | BMCR_ANRESTART); 2267 } 2268 EXPORT_SYMBOL(genphy_restart_aneg); 2269 2270 /** 2271 * genphy_check_and_restart_aneg - Enable and restart auto-negotiation 2272 * @phydev: target phy_device struct 2273 * @restart: whether aneg restart is requested 2274 * 2275 * Check, and restart auto-negotiation if needed. 2276 */ 2277 int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart) 2278 { 2279 int ret; 2280 2281 if (!restart) { 2282 /* Advertisement hasn't changed, but maybe aneg was never on to 2283 * begin with? Or maybe phy was isolated? 2284 */ 2285 ret = phy_read(phydev, MII_BMCR); 2286 if (ret < 0) 2287 return ret; 2288 2289 if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE)) 2290 restart = true; 2291 } 2292 2293 if (restart) 2294 return genphy_restart_aneg(phydev); 2295 2296 return 0; 2297 } 2298 EXPORT_SYMBOL(genphy_check_and_restart_aneg); 2299 2300 /** 2301 * __genphy_config_aneg - restart auto-negotiation or write BMCR 2302 * @phydev: target phy_device struct 2303 * @changed: whether autoneg is requested 2304 * 2305 * Description: If auto-negotiation is enabled, we configure the 2306 * advertising, and then restart auto-negotiation. If it is not 2307 * enabled, then we write the BMCR. 2308 */ 2309 int __genphy_config_aneg(struct phy_device *phydev, bool changed) 2310 { 2311 __ETHTOOL_DECLARE_LINK_MODE_MASK(fixed_advert); 2312 const struct link_capabilities *c; 2313 unsigned long *advert; 2314 int err; 2315 2316 err = genphy_c45_an_config_eee_aneg(phydev); 2317 if (err < 0) 2318 return err; 2319 else if (err) 2320 changed = true; 2321 2322 err = genphy_setup_master_slave(phydev); 2323 if (err < 0) 2324 return err; 2325 else if (err) 2326 changed = true; 2327 2328 if (phydev->autoneg == AUTONEG_ENABLE) { 2329 /* Only allow advertising what this PHY supports */ 2330 linkmode_and(phydev->advertising, phydev->advertising, 2331 phydev->supported); 2332 advert = phydev->advertising; 2333 } else if (phydev->speed < SPEED_1000) { 2334 return genphy_setup_forced(phydev); 2335 } else { 2336 linkmode_zero(fixed_advert); 2337 2338 c = phy_caps_lookup(phydev->speed, phydev->duplex, 2339 phydev->supported, true); 2340 if (c) 2341 linkmode_and(fixed_advert, phydev->supported, 2342 c->linkmodes); 2343 2344 advert = fixed_advert; 2345 } 2346 2347 err = genphy_config_advert(phydev, advert); 2348 if (err < 0) /* error */ 2349 return err; 2350 else if (err) 2351 changed = true; 2352 2353 return genphy_check_and_restart_aneg(phydev, changed); 2354 } 2355 EXPORT_SYMBOL(__genphy_config_aneg); 2356 2357 /** 2358 * genphy_c37_config_aneg - restart auto-negotiation or write BMCR 2359 * @phydev: target phy_device struct 2360 * 2361 * Description: If auto-negotiation is enabled, we configure the 2362 * advertising, and then restart auto-negotiation. If it is not 2363 * enabled, then we write the BMCR. This function is intended 2364 * for use with Clause 37 1000Base-X mode. 2365 */ 2366 int genphy_c37_config_aneg(struct phy_device *phydev) 2367 { 2368 int err, changed; 2369 2370 if (phydev->autoneg != AUTONEG_ENABLE) 2371 return genphy_setup_forced(phydev); 2372 2373 err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100, 2374 BMCR_SPEED1000); 2375 if (err) 2376 return err; 2377 2378 changed = genphy_c37_config_advert(phydev); 2379 if (changed < 0) /* error */ 2380 return changed; 2381 2382 if (!changed) { 2383 /* Advertisement hasn't changed, but maybe aneg was never on to 2384 * begin with? Or maybe phy was isolated? 2385 */ 2386 int ctl = phy_read(phydev, MII_BMCR); 2387 2388 if (ctl < 0) 2389 return ctl; 2390 2391 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) 2392 changed = 1; /* do restart aneg */ 2393 } 2394 2395 /* Only restart aneg if we are advertising something different 2396 * than we were before. 2397 */ 2398 if (changed > 0) 2399 return genphy_restart_aneg(phydev); 2400 2401 return 0; 2402 } 2403 EXPORT_SYMBOL(genphy_c37_config_aneg); 2404 2405 /** 2406 * genphy_aneg_done - return auto-negotiation status 2407 * @phydev: target phy_device struct 2408 * 2409 * Description: Reads the status register and returns 0 either if 2410 * auto-negotiation is incomplete, or if there was an error. 2411 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. 2412 */ 2413 int genphy_aneg_done(struct phy_device *phydev) 2414 { 2415 int retval = phy_read(phydev, MII_BMSR); 2416 2417 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); 2418 } 2419 EXPORT_SYMBOL(genphy_aneg_done); 2420 2421 /** 2422 * genphy_update_link - update link status in @phydev 2423 * @phydev: target phy_device struct 2424 * 2425 * Description: Update the value in phydev->link to reflect the 2426 * current link value. In order to do this, we need to read 2427 * the status register twice, keeping the second value. 2428 */ 2429 int genphy_update_link(struct phy_device *phydev) 2430 { 2431 int status = 0, bmcr; 2432 2433 bmcr = phy_read(phydev, MII_BMCR); 2434 if (bmcr < 0) 2435 return bmcr; 2436 2437 /* Autoneg is being started, therefore disregard BMSR value and 2438 * report link as down. 2439 */ 2440 if (bmcr & BMCR_ANRESTART) 2441 goto done; 2442 2443 /* The link state is latched low so that momentary link 2444 * drops can be detected. Do not double-read the status 2445 * in polling mode to detect such short link drops except 2446 * if the link was already down. 2447 */ 2448 if (!phy_polling_mode(phydev) || !phydev->link) { 2449 status = phy_read(phydev, MII_BMSR); 2450 if (status < 0) 2451 return status; 2452 else if (status & BMSR_LSTATUS) 2453 goto done; 2454 } 2455 2456 /* Read link and autonegotiation status */ 2457 status = phy_read(phydev, MII_BMSR); 2458 if (status < 0) 2459 return status; 2460 done: 2461 phydev->link = status & BMSR_LSTATUS ? 1 : 0; 2462 phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0; 2463 2464 /* Consider the case that autoneg was started and "aneg complete" 2465 * bit has been reset, but "link up" bit not yet. 2466 */ 2467 if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete) 2468 phydev->link = 0; 2469 2470 return 0; 2471 } 2472 EXPORT_SYMBOL(genphy_update_link); 2473 2474 int genphy_read_lpa(struct phy_device *phydev) 2475 { 2476 int lpa, lpagb; 2477 2478 if (phydev->autoneg == AUTONEG_ENABLE) { 2479 if (!phydev->autoneg_complete) { 2480 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, 2481 0); 2482 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0); 2483 return 0; 2484 } 2485 2486 if (phydev->is_gigabit_capable) { 2487 lpagb = phy_read(phydev, MII_STAT1000); 2488 if (lpagb < 0) 2489 return lpagb; 2490 2491 if (lpagb & LPA_1000MSFAIL) { 2492 int adv = phy_read(phydev, MII_CTRL1000); 2493 2494 if (adv < 0) 2495 return adv; 2496 2497 if (adv & CTL1000_ENABLE_MASTER) 2498 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n"); 2499 else 2500 phydev_err(phydev, "Master/Slave resolution failed\n"); 2501 return -ENOLINK; 2502 } 2503 2504 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, 2505 lpagb); 2506 } 2507 2508 lpa = phy_read(phydev, MII_LPA); 2509 if (lpa < 0) 2510 return lpa; 2511 2512 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa); 2513 } else { 2514 linkmode_zero(phydev->lp_advertising); 2515 } 2516 2517 return 0; 2518 } 2519 EXPORT_SYMBOL(genphy_read_lpa); 2520 2521 /** 2522 * genphy_read_status_fixed - read the link parameters for !aneg mode 2523 * @phydev: target phy_device struct 2524 * 2525 * Read the current duplex and speed state for a PHY operating with 2526 * autonegotiation disabled. 2527 */ 2528 int genphy_read_status_fixed(struct phy_device *phydev) 2529 { 2530 int bmcr = phy_read(phydev, MII_BMCR); 2531 2532 if (bmcr < 0) 2533 return bmcr; 2534 2535 if (bmcr & BMCR_FULLDPLX) 2536 phydev->duplex = DUPLEX_FULL; 2537 else 2538 phydev->duplex = DUPLEX_HALF; 2539 2540 if (bmcr & BMCR_SPEED1000) 2541 phydev->speed = SPEED_1000; 2542 else if (bmcr & BMCR_SPEED100) 2543 phydev->speed = SPEED_100; 2544 else 2545 phydev->speed = SPEED_10; 2546 2547 return 0; 2548 } 2549 EXPORT_SYMBOL(genphy_read_status_fixed); 2550 2551 /** 2552 * genphy_read_status - check the link status and update current link state 2553 * @phydev: target phy_device struct 2554 * 2555 * Description: Check the link, then figure out the current state 2556 * by comparing what we advertise with what the link partner 2557 * advertises. Start by checking the gigabit possibilities, 2558 * then move on to 10/100. 2559 */ 2560 int genphy_read_status(struct phy_device *phydev) 2561 { 2562 int err, old_link = phydev->link; 2563 2564 /* Update the link, but return if there was an error */ 2565 err = genphy_update_link(phydev); 2566 if (err) 2567 return err; 2568 2569 /* why bother the PHY if nothing can have changed */ 2570 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) 2571 return 0; 2572 2573 phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED; 2574 phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED; 2575 phydev->speed = SPEED_UNKNOWN; 2576 phydev->duplex = DUPLEX_UNKNOWN; 2577 phydev->pause = false; 2578 phydev->asym_pause = false; 2579 2580 if (phydev->is_gigabit_capable) { 2581 err = genphy_read_master_slave(phydev); 2582 if (err < 0) 2583 return err; 2584 } 2585 2586 err = genphy_read_lpa(phydev); 2587 if (err < 0) 2588 return err; 2589 2590 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { 2591 phy_resolve_aneg_linkmode(phydev); 2592 } else if (phydev->autoneg == AUTONEG_DISABLE) { 2593 err = genphy_read_status_fixed(phydev); 2594 if (err < 0) 2595 return err; 2596 } 2597 2598 return 0; 2599 } 2600 EXPORT_SYMBOL(genphy_read_status); 2601 2602 /** 2603 * genphy_c37_read_status - check the link status and update current link state 2604 * @phydev: target phy_device struct 2605 * @changed: pointer where to store if link changed 2606 * 2607 * Description: Check the link, then figure out the current state 2608 * by comparing what we advertise with what the link partner 2609 * advertises. This function is for Clause 37 1000Base-X mode. 2610 * 2611 * If link has changed, @changed is set to true, false otherwise. 2612 */ 2613 int genphy_c37_read_status(struct phy_device *phydev, bool *changed) 2614 { 2615 int lpa, err, old_link = phydev->link; 2616 2617 /* Update the link, but return if there was an error */ 2618 err = genphy_update_link(phydev); 2619 if (err) 2620 return err; 2621 2622 /* why bother the PHY if nothing can have changed */ 2623 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) { 2624 *changed = false; 2625 return 0; 2626 } 2627 2628 /* Signal link has changed */ 2629 *changed = true; 2630 phydev->duplex = DUPLEX_UNKNOWN; 2631 phydev->pause = false; 2632 phydev->asym_pause = false; 2633 2634 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { 2635 lpa = phy_read(phydev, MII_LPA); 2636 if (lpa < 0) 2637 return lpa; 2638 2639 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2640 phydev->lp_advertising, lpa & LPA_LPACK); 2641 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 2642 phydev->lp_advertising, lpa & LPA_1000XFULL); 2643 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2644 phydev->lp_advertising, lpa & LPA_1000XPAUSE); 2645 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2646 phydev->lp_advertising, 2647 lpa & LPA_1000XPAUSE_ASYM); 2648 2649 phy_resolve_aneg_linkmode(phydev); 2650 } else if (phydev->autoneg == AUTONEG_DISABLE) { 2651 int bmcr = phy_read(phydev, MII_BMCR); 2652 2653 if (bmcr < 0) 2654 return bmcr; 2655 2656 if (bmcr & BMCR_FULLDPLX) 2657 phydev->duplex = DUPLEX_FULL; 2658 else 2659 phydev->duplex = DUPLEX_HALF; 2660 } 2661 2662 return 0; 2663 } 2664 EXPORT_SYMBOL(genphy_c37_read_status); 2665 2666 /** 2667 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit 2668 * @phydev: target phy_device struct 2669 * 2670 * Description: Perform a software PHY reset using the standard 2671 * BMCR_RESET bit and poll for the reset bit to be cleared. 2672 * 2673 * Returns: 0 on success, < 0 on failure 2674 */ 2675 int genphy_soft_reset(struct phy_device *phydev) 2676 { 2677 u16 res = BMCR_RESET; 2678 int ret; 2679 2680 if (phydev->autoneg == AUTONEG_ENABLE) 2681 res |= BMCR_ANRESTART; 2682 2683 ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res); 2684 if (ret < 0) 2685 return ret; 2686 2687 /* Clause 22 states that setting bit BMCR_RESET sets control registers 2688 * to their default value. Therefore the POWER DOWN bit is supposed to 2689 * be cleared after soft reset. 2690 */ 2691 phydev->suspended = 0; 2692 2693 ret = phy_poll_reset(phydev); 2694 if (ret) 2695 return ret; 2696 2697 /* BMCR may be reset to defaults */ 2698 if (phydev->autoneg == AUTONEG_DISABLE) 2699 ret = genphy_setup_forced(phydev); 2700 2701 return ret; 2702 } 2703 EXPORT_SYMBOL(genphy_soft_reset); 2704 2705 irqreturn_t genphy_handle_interrupt_no_ack(struct phy_device *phydev) 2706 { 2707 /* It seems there are cases where the interrupts are handled by another 2708 * entity (ie an IRQ controller embedded inside the PHY) and do not 2709 * need any other interraction from phylib. In this case, just trigger 2710 * the state machine directly. 2711 */ 2712 phy_trigger_machine(phydev); 2713 2714 return 0; 2715 } 2716 EXPORT_SYMBOL(genphy_handle_interrupt_no_ack); 2717 2718 /** 2719 * genphy_read_abilities - read PHY abilities from Clause 22 registers 2720 * @phydev: target phy_device struct 2721 * 2722 * Description: Reads the PHY's abilities and populates 2723 * phydev->supported accordingly. 2724 * 2725 * Returns: 0 on success, < 0 on failure 2726 */ 2727 int genphy_read_abilities(struct phy_device *phydev) 2728 { 2729 int val; 2730 2731 linkmode_set_bit_array(phy_basic_ports_array, 2732 ARRAY_SIZE(phy_basic_ports_array), 2733 phydev->supported); 2734 2735 val = phy_read(phydev, MII_BMSR); 2736 if (val < 0) 2737 return val; 2738 2739 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported, 2740 val & BMSR_ANEGCAPABLE); 2741 2742 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported, 2743 val & BMSR_100FULL); 2744 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported, 2745 val & BMSR_100HALF); 2746 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported, 2747 val & BMSR_10FULL); 2748 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported, 2749 val & BMSR_10HALF); 2750 2751 if (val & BMSR_ESTATEN) { 2752 val = phy_read(phydev, MII_ESTATUS); 2753 if (val < 0) 2754 return val; 2755 2756 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 2757 phydev->supported, val & ESTATUS_1000_TFULL); 2758 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 2759 phydev->supported, val & ESTATUS_1000_THALF); 2760 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 2761 phydev->supported, val & ESTATUS_1000_XFULL); 2762 } 2763 2764 /* This is optional functionality. If not supported, we may get an error 2765 * which should be ignored. 2766 */ 2767 genphy_c45_read_eee_abilities(phydev); 2768 2769 return 0; 2770 } 2771 EXPORT_SYMBOL(genphy_read_abilities); 2772 2773 /* Some PHYs support direct C45 register access but not C22 indirect 2774 * MMD access (registers 13 and 14). When discovered via C22, phylib 2775 * routes MMD access through the indirect path, which won't work on 2776 * these devices. These helpers bypass indirect access and use the bus 2777 * C45 accessors directly. 2778 */ 2779 int genphy_read_mmd_c45(struct phy_device *phydev, int devnum, u16 regnum) 2780 { 2781 struct mii_bus *bus = phydev->mdio.bus; 2782 int addr = phydev->mdio.addr; 2783 2784 return __mdiobus_c45_read(bus, addr, devnum, regnum); 2785 } 2786 EXPORT_SYMBOL(genphy_read_mmd_c45); 2787 2788 int genphy_write_mmd_c45(struct phy_device *phydev, int devnum, u16 regnum, 2789 u16 val) 2790 { 2791 struct mii_bus *bus = phydev->mdio.bus; 2792 int addr = phydev->mdio.addr; 2793 2794 return __mdiobus_c45_write(bus, addr, devnum, regnum, val); 2795 } 2796 EXPORT_SYMBOL(genphy_write_mmd_c45); 2797 2798 /* This is used for the phy device which doesn't support the MMD extended 2799 * register access, but it does have side effect when we are trying to access 2800 * the MMD register via indirect method. 2801 */ 2802 int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum) 2803 { 2804 return -EOPNOTSUPP; 2805 } 2806 EXPORT_SYMBOL(genphy_read_mmd_unsupported); 2807 2808 int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum, 2809 u16 regnum, u16 val) 2810 { 2811 return -EOPNOTSUPP; 2812 } 2813 EXPORT_SYMBOL(genphy_write_mmd_unsupported); 2814 2815 int genphy_suspend(struct phy_device *phydev) 2816 { 2817 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN); 2818 } 2819 EXPORT_SYMBOL(genphy_suspend); 2820 2821 int genphy_resume(struct phy_device *phydev) 2822 { 2823 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN); 2824 } 2825 EXPORT_SYMBOL(genphy_resume); 2826 2827 int genphy_loopback(struct phy_device *phydev, bool enable, int speed) 2828 { 2829 if (enable) { 2830 u16 ctl = BMCR_LOOPBACK; 2831 int ret, val; 2832 2833 if (speed == SPEED_10 || speed == SPEED_100 || 2834 speed == SPEED_1000) 2835 phydev->speed = speed; 2836 else if (speed) 2837 return -EINVAL; 2838 2839 ctl |= mii_bmcr_encode_fixed(phydev->speed, phydev->duplex); 2840 2841 phy_modify(phydev, MII_BMCR, ~0, ctl); 2842 2843 ret = phy_read_poll_timeout(phydev, MII_BMSR, val, 2844 val & BMSR_LSTATUS, 2845 5000, 500000, true); 2846 if (ret) 2847 return ret; 2848 } else { 2849 phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 0); 2850 2851 phy_config_aneg(phydev); 2852 } 2853 2854 return 0; 2855 } 2856 EXPORT_SYMBOL(genphy_loopback); 2857 2858 /** 2859 * phy_remove_link_mode - Remove a supported link mode 2860 * @phydev: phy_device structure to remove link mode from 2861 * @link_mode: Link mode to be removed 2862 * 2863 * Description: Some MACs don't support all link modes which the PHY 2864 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper 2865 * to remove a link mode. 2866 */ 2867 void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode) 2868 { 2869 linkmode_clear_bit(link_mode, phydev->supported); 2870 phy_advertise_supported(phydev); 2871 } 2872 EXPORT_SYMBOL(phy_remove_link_mode); 2873 2874 static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src) 2875 { 2876 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst, 2877 linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src)); 2878 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst, 2879 linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src)); 2880 } 2881 2882 /** 2883 * phy_advertise_supported - Advertise all supported modes 2884 * @phydev: target phy_device struct 2885 * 2886 * Description: Called to advertise all supported modes, doesn't touch 2887 * pause mode advertising. 2888 */ 2889 void phy_advertise_supported(struct phy_device *phydev) 2890 { 2891 __ETHTOOL_DECLARE_LINK_MODE_MASK(new); 2892 2893 linkmode_copy(new, phydev->supported); 2894 phy_copy_pause_bits(new, phydev->advertising); 2895 linkmode_copy(phydev->advertising, new); 2896 } 2897 EXPORT_SYMBOL(phy_advertise_supported); 2898 2899 /** 2900 * phy_advertise_eee_all - Advertise all supported EEE modes 2901 * @phydev: target phy_device struct 2902 * 2903 * Description: Per default phylib preserves the EEE advertising at the time of 2904 * phy probing, which might be a subset of the supported EEE modes. Use this 2905 * function when all supported EEE modes should be advertised. This does not 2906 * trigger auto-negotiation, so must be called before phy_start()/ 2907 * phylink_start() which will start auto-negotiation. 2908 */ 2909 void phy_advertise_eee_all(struct phy_device *phydev) 2910 { 2911 linkmode_andnot(phydev->advertising_eee, phydev->supported_eee, 2912 phydev->eee_disabled_modes); 2913 } 2914 EXPORT_SYMBOL_GPL(phy_advertise_eee_all); 2915 2916 /** 2917 * phy_support_eee - Set initial EEE policy configuration 2918 * @phydev: Target phy_device struct 2919 * 2920 * This function configures the initial policy for Energy Efficient Ethernet 2921 * (EEE) on the specified PHY device, influencing that EEE capabilities are 2922 * advertised before the link is established. It should be called during PHY 2923 * registration by the MAC driver and/or the PHY driver (for SmartEEE PHYs) 2924 * if MAC supports LPI or PHY is capable to compensate missing LPI functionality 2925 * of the MAC. 2926 * 2927 * The function sets default EEE policy parameters, including preparing the PHY 2928 * to advertise EEE capabilities based on hardware support. 2929 * 2930 * It also sets the expected configuration for Low Power Idle (LPI) in the MAC 2931 * driver. If the PHY framework determines that both local and remote 2932 * advertisements support EEE, and the negotiated link mode is compatible with 2933 * EEE, it will set enable_tx_lpi = true. The MAC driver is expected to act on 2934 * this setting by enabling the LPI timer if enable_tx_lpi is set. 2935 */ 2936 void phy_support_eee(struct phy_device *phydev) 2937 { 2938 linkmode_andnot(phydev->advertising_eee, phydev->supported_eee, 2939 phydev->eee_disabled_modes); 2940 phydev->eee_cfg.tx_lpi_enabled = true; 2941 phydev->eee_cfg.eee_enabled = true; 2942 2943 /* If the PHY supports autonomous EEE, disable it so the MAC can 2944 * manage LPI signaling instead. The flag is stored so it can be 2945 * re-applied after a PHY soft reset (e.g. suspend/resume). 2946 */ 2947 if (phydev->drv && phydev->drv->disable_autonomous_eee) { 2948 int ret = phydev->drv->disable_autonomous_eee(phydev); 2949 2950 if (ret) 2951 phydev_warn(phydev, "Failed to disable autonomous EEE: %pe\n", 2952 ERR_PTR(ret)); 2953 else 2954 phydev->autonomous_eee_disabled = true; 2955 } 2956 } 2957 EXPORT_SYMBOL(phy_support_eee); 2958 2959 /** 2960 * phy_disable_eee - Disable EEE for the PHY 2961 * @phydev: Target phy_device struct 2962 * 2963 * This function is used by MAC drivers for MAC's which don't support EEE. 2964 * It disables EEE on the PHY layer. 2965 */ 2966 void phy_disable_eee(struct phy_device *phydev) 2967 { 2968 linkmode_zero(phydev->advertising_eee); 2969 phydev->eee_cfg.tx_lpi_enabled = false; 2970 phydev->eee_cfg.eee_enabled = false; 2971 /* don't let userspace re-enable EEE advertisement */ 2972 linkmode_fill(phydev->eee_disabled_modes); 2973 } 2974 EXPORT_SYMBOL_GPL(phy_disable_eee); 2975 2976 /** 2977 * phy_support_sym_pause - Enable support of symmetrical pause 2978 * @phydev: target phy_device struct 2979 * 2980 * Description: Called by the MAC to indicate is supports symmetrical 2981 * Pause, but not asym pause. 2982 */ 2983 void phy_support_sym_pause(struct phy_device *phydev) 2984 { 2985 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported); 2986 phy_copy_pause_bits(phydev->advertising, phydev->supported); 2987 } 2988 EXPORT_SYMBOL(phy_support_sym_pause); 2989 2990 /** 2991 * phy_support_asym_pause - Enable support of asym pause 2992 * @phydev: target phy_device struct 2993 * 2994 * Description: Called by the MAC to indicate is supports Asym Pause. 2995 */ 2996 void phy_support_asym_pause(struct phy_device *phydev) 2997 { 2998 phy_copy_pause_bits(phydev->advertising, phydev->supported); 2999 } 3000 EXPORT_SYMBOL(phy_support_asym_pause); 3001 3002 /** 3003 * phy_set_sym_pause - Configure symmetric Pause 3004 * @phydev: target phy_device struct 3005 * @rx: Receiver Pause is supported 3006 * @tx: Transmit Pause is supported 3007 * @autoneg: Auto neg should be used 3008 * 3009 * Description: Configure advertised Pause support depending on if 3010 * receiver pause and pause auto neg is supported. Generally called 3011 * from the set_pauseparam .ndo. 3012 */ 3013 void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx, 3014 bool autoneg) 3015 { 3016 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported); 3017 3018 if (rx && tx && autoneg) 3019 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 3020 phydev->supported); 3021 3022 linkmode_copy(phydev->advertising, phydev->supported); 3023 } 3024 EXPORT_SYMBOL(phy_set_sym_pause); 3025 3026 /** 3027 * phy_set_asym_pause - Configure Pause and Asym Pause 3028 * @phydev: target phy_device struct 3029 * @rx: Receiver Pause is supported 3030 * @tx: Transmit Pause is supported 3031 * 3032 * Description: Configure advertised Pause support depending on if 3033 * transmit and receiver pause is supported. If there has been a 3034 * change in adverting, trigger a new autoneg. Generally called from 3035 * the set_pauseparam .ndo. 3036 */ 3037 void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx) 3038 { 3039 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv); 3040 3041 linkmode_copy(oldadv, phydev->advertising); 3042 linkmode_set_pause(phydev->advertising, tx, rx); 3043 3044 if (!linkmode_equal(oldadv, phydev->advertising) && 3045 phydev->autoneg) 3046 phy_start_aneg(phydev); 3047 } 3048 EXPORT_SYMBOL(phy_set_asym_pause); 3049 3050 /** 3051 * phy_validate_pause - Test if the PHY/MAC support the pause configuration 3052 * @phydev: phy_device struct 3053 * @pp: requested pause configuration 3054 * 3055 * Description: Test if the PHY/MAC combination supports the Pause 3056 * configuration the user is requesting. Returns True if it is 3057 * supported, false otherwise. 3058 */ 3059 bool phy_validate_pause(struct phy_device *phydev, 3060 struct ethtool_pauseparam *pp) 3061 { 3062 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 3063 phydev->supported) && pp->rx_pause) 3064 return false; 3065 3066 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 3067 phydev->supported) && 3068 pp->rx_pause != pp->tx_pause) 3069 return false; 3070 3071 return true; 3072 } 3073 EXPORT_SYMBOL(phy_validate_pause); 3074 3075 /** 3076 * phy_get_pause - resolve negotiated pause modes 3077 * @phydev: phy_device struct 3078 * @tx_pause: pointer to bool to indicate whether transmit pause should be 3079 * enabled. 3080 * @rx_pause: pointer to bool to indicate whether receive pause should be 3081 * enabled. 3082 * 3083 * Resolve and return the flow control modes according to the negotiation 3084 * result. This includes checking that we are operating in full duplex mode. 3085 * See linkmode_resolve_pause() for further details. 3086 */ 3087 void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause) 3088 { 3089 if (phydev->duplex != DUPLEX_FULL) { 3090 *tx_pause = false; 3091 *rx_pause = false; 3092 return; 3093 } 3094 3095 return linkmode_resolve_pause(phydev->advertising, 3096 phydev->lp_advertising, 3097 tx_pause, rx_pause); 3098 } 3099 EXPORT_SYMBOL(phy_get_pause); 3100 3101 #if IS_ENABLED(CONFIG_OF_MDIO) 3102 static int phy_get_u32_property(struct device *dev, const char *name, u32 *val) 3103 { 3104 return device_property_read_u32(dev, name, val); 3105 } 3106 #else 3107 static int phy_get_u32_property(struct device *dev, const char *name, u32 *val) 3108 { 3109 return -EINVAL; 3110 } 3111 #endif 3112 3113 /** 3114 * phy_get_internal_delay - returns the index of the internal delay 3115 * @phydev: phy_device struct 3116 * @delay_values: array of delays the PHY supports 3117 * @size: the size of the delay array 3118 * @is_rx: boolean to indicate to get the rx internal delay 3119 * 3120 * Returns the index within the array of internal delay passed in. 3121 * If the device property is not present then the interface type is checked 3122 * if the interface defines use of internal delay then a 1 is returned otherwise 3123 * a 0 is returned. 3124 * The array must be in ascending order. If PHY does not have an ascending order 3125 * array then size = 0 and the value of the delay property is returned. 3126 * Return -EINVAL if the delay is invalid or cannot be found. 3127 */ 3128 s32 phy_get_internal_delay(struct phy_device *phydev, const int *delay_values, 3129 int size, bool is_rx) 3130 { 3131 struct device *dev = &phydev->mdio.dev; 3132 int i, ret; 3133 u32 delay; 3134 3135 if (is_rx) { 3136 ret = phy_get_u32_property(dev, "rx-internal-delay-ps", &delay); 3137 if (ret < 0 && size == 0) { 3138 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || 3139 phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) 3140 return 1; 3141 else 3142 return 0; 3143 } 3144 3145 } else { 3146 ret = phy_get_u32_property(dev, "tx-internal-delay-ps", &delay); 3147 if (ret < 0 && size == 0) { 3148 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || 3149 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) 3150 return 1; 3151 else 3152 return 0; 3153 } 3154 } 3155 3156 if (ret < 0) 3157 return ret; 3158 3159 if (size == 0) 3160 return delay; 3161 3162 if (delay < delay_values[0] || delay > delay_values[size - 1]) { 3163 phydev_err(phydev, "Delay %d is out of range\n", delay); 3164 return -EINVAL; 3165 } 3166 3167 if (delay == delay_values[0]) 3168 return 0; 3169 3170 for (i = 1; i < size; i++) { 3171 if (delay == delay_values[i]) 3172 return i; 3173 3174 /* Find an approximate index by looking up the table */ 3175 if (delay > delay_values[i - 1] && 3176 delay < delay_values[i]) { 3177 if (delay - delay_values[i - 1] < 3178 delay_values[i] - delay) 3179 return i - 1; 3180 else 3181 return i; 3182 } 3183 } 3184 3185 phydev_err(phydev, "error finding internal delay index for %d\n", 3186 delay); 3187 3188 return -EINVAL; 3189 } 3190 EXPORT_SYMBOL(phy_get_internal_delay); 3191 3192 /** 3193 * phy_get_tx_amplitude_gain - stores tx amplitude gain in @val 3194 * @phydev: phy_device struct 3195 * @dev: pointer to the devices device struct 3196 * @linkmode: linkmode for which the tx amplitude gain should be retrieved 3197 * @val: tx amplitude gain 3198 * 3199 * Returns: 0 on success, < 0 on failure 3200 */ 3201 int phy_get_tx_amplitude_gain(struct phy_device *phydev, struct device *dev, 3202 enum ethtool_link_mode_bit_indices linkmode, 3203 u32 *val) 3204 { 3205 switch (linkmode) { 3206 case ETHTOOL_LINK_MODE_100baseT_Full_BIT: 3207 return phy_get_u32_property(dev, 3208 "tx-amplitude-100base-tx-percent", 3209 val); 3210 default: 3211 return -EINVAL; 3212 } 3213 } 3214 EXPORT_SYMBOL_GPL(phy_get_tx_amplitude_gain); 3215 3216 /** 3217 * phy_get_mac_termination - stores MAC termination in @val 3218 * @phydev: phy_device struct 3219 * @dev: pointer to the devices device struct 3220 * @val: MAC termination 3221 * 3222 * Returns: 0 on success, < 0 on failure 3223 */ 3224 int phy_get_mac_termination(struct phy_device *phydev, struct device *dev, 3225 u32 *val) 3226 { 3227 return phy_get_u32_property(dev, "mac-termination-ohms", val); 3228 } 3229 EXPORT_SYMBOL_GPL(phy_get_mac_termination); 3230 3231 static int phy_led_set_brightness(struct led_classdev *led_cdev, 3232 enum led_brightness value) 3233 { 3234 struct phy_led *phyled = to_phy_led(led_cdev); 3235 struct phy_device *phydev = phyled->phydev; 3236 int err; 3237 3238 mutex_lock(&phydev->lock); 3239 err = phydev->drv->led_brightness_set(phydev, phyled->index, value); 3240 mutex_unlock(&phydev->lock); 3241 3242 return err; 3243 } 3244 3245 static int phy_led_blink_set(struct led_classdev *led_cdev, 3246 unsigned long *delay_on, 3247 unsigned long *delay_off) 3248 { 3249 struct phy_led *phyled = to_phy_led(led_cdev); 3250 struct phy_device *phydev = phyled->phydev; 3251 int err; 3252 3253 mutex_lock(&phydev->lock); 3254 err = phydev->drv->led_blink_set(phydev, phyled->index, 3255 delay_on, delay_off); 3256 mutex_unlock(&phydev->lock); 3257 3258 return err; 3259 } 3260 3261 static __maybe_unused struct device * 3262 phy_led_hw_control_get_device(struct led_classdev *led_cdev) 3263 { 3264 struct phy_led *phyled = to_phy_led(led_cdev); 3265 struct phy_device *phydev = phyled->phydev; 3266 3267 if (phydev->attached_dev) 3268 return &phydev->attached_dev->dev; 3269 return NULL; 3270 } 3271 3272 static int __maybe_unused 3273 phy_led_hw_control_get(struct led_classdev *led_cdev, 3274 unsigned long *rules) 3275 { 3276 struct phy_led *phyled = to_phy_led(led_cdev); 3277 struct phy_device *phydev = phyled->phydev; 3278 int err; 3279 3280 mutex_lock(&phydev->lock); 3281 err = phydev->drv->led_hw_control_get(phydev, phyled->index, rules); 3282 mutex_unlock(&phydev->lock); 3283 3284 return err; 3285 } 3286 3287 static int __maybe_unused 3288 phy_led_hw_control_set(struct led_classdev *led_cdev, 3289 unsigned long rules) 3290 { 3291 struct phy_led *phyled = to_phy_led(led_cdev); 3292 struct phy_device *phydev = phyled->phydev; 3293 int err; 3294 3295 mutex_lock(&phydev->lock); 3296 err = phydev->drv->led_hw_control_set(phydev, phyled->index, rules); 3297 mutex_unlock(&phydev->lock); 3298 3299 return err; 3300 } 3301 3302 static __maybe_unused int phy_led_hw_is_supported(struct led_classdev *led_cdev, 3303 unsigned long rules) 3304 { 3305 struct phy_led *phyled = to_phy_led(led_cdev); 3306 struct phy_device *phydev = phyled->phydev; 3307 int err; 3308 3309 mutex_lock(&phydev->lock); 3310 err = phydev->drv->led_hw_is_supported(phydev, phyled->index, rules); 3311 mutex_unlock(&phydev->lock); 3312 3313 return err; 3314 } 3315 3316 static void phy_leds_unregister(struct phy_device *phydev) 3317 { 3318 struct phy_led *phyled, *tmp; 3319 3320 list_for_each_entry_safe(phyled, tmp, &phydev->leds, list) { 3321 led_classdev_unregister(&phyled->led_cdev); 3322 list_del(&phyled->list); 3323 } 3324 } 3325 3326 static int of_phy_led(struct phy_device *phydev, 3327 struct device_node *led) 3328 { 3329 struct device *dev = &phydev->mdio.dev; 3330 struct led_init_data init_data = {}; 3331 struct led_classdev *cdev; 3332 unsigned long modes = 0; 3333 struct phy_led *phyled; 3334 u32 index; 3335 int err; 3336 3337 phyled = devm_kzalloc(dev, sizeof(*phyled), GFP_KERNEL); 3338 if (!phyled) 3339 return -ENOMEM; 3340 3341 cdev = &phyled->led_cdev; 3342 phyled->phydev = phydev; 3343 3344 err = of_property_read_u32(led, "reg", &index); 3345 if (err) 3346 return err; 3347 if (index > U8_MAX) 3348 return -EINVAL; 3349 3350 if (of_property_read_bool(led, "active-high")) 3351 set_bit(PHY_LED_ACTIVE_HIGH, &modes); 3352 if (of_property_read_bool(led, "active-low")) 3353 set_bit(PHY_LED_ACTIVE_LOW, &modes); 3354 if (of_property_read_bool(led, "inactive-high-impedance")) 3355 set_bit(PHY_LED_INACTIVE_HIGH_IMPEDANCE, &modes); 3356 3357 if (WARN_ON(modes & BIT(PHY_LED_ACTIVE_LOW) && 3358 modes & BIT(PHY_LED_ACTIVE_HIGH))) 3359 return -EINVAL; 3360 3361 if (modes) { 3362 /* Return error if asked to set polarity modes but not supported */ 3363 if (!phydev->drv->led_polarity_set) 3364 return -EINVAL; 3365 3366 err = phydev->drv->led_polarity_set(phydev, index, modes); 3367 if (err) 3368 return err; 3369 } 3370 3371 phyled->index = index; 3372 if (phydev->drv->led_brightness_set) 3373 cdev->brightness_set_blocking = phy_led_set_brightness; 3374 if (phydev->drv->led_blink_set) 3375 cdev->blink_set = phy_led_blink_set; 3376 3377 #ifdef CONFIG_LEDS_TRIGGERS 3378 if (phydev->drv->led_hw_is_supported && 3379 phydev->drv->led_hw_control_set && 3380 phydev->drv->led_hw_control_get) { 3381 cdev->hw_control_is_supported = phy_led_hw_is_supported; 3382 cdev->hw_control_set = phy_led_hw_control_set; 3383 cdev->hw_control_get = phy_led_hw_control_get; 3384 cdev->hw_control_trigger = "netdev"; 3385 } 3386 3387 cdev->hw_control_get_device = phy_led_hw_control_get_device; 3388 #endif 3389 cdev->max_brightness = 1; 3390 init_data.devicename = dev_name(&phydev->mdio.dev); 3391 init_data.fwnode = of_fwnode_handle(led); 3392 init_data.devname_mandatory = true; 3393 3394 err = led_classdev_register_ext(dev, cdev, &init_data); 3395 if (err) 3396 return err; 3397 3398 list_add(&phyled->list, &phydev->leds); 3399 3400 return 0; 3401 } 3402 3403 static int of_phy_leds(struct phy_device *phydev) 3404 { 3405 struct device_node *node = phydev->mdio.dev.of_node; 3406 struct device_node *leds; 3407 int err; 3408 3409 if (!IS_ENABLED(CONFIG_OF_MDIO)) 3410 return 0; 3411 3412 if (!node) 3413 return 0; 3414 3415 leds = of_get_child_by_name(node, "leds"); 3416 if (!leds) 3417 return 0; 3418 3419 /* Check if the PHY driver have at least an OP to 3420 * set the LEDs. 3421 */ 3422 if (!(phydev->drv->led_brightness_set || 3423 phydev->drv->led_blink_set || 3424 phydev->drv->led_hw_control_set)) { 3425 phydev_dbg(phydev, "ignoring leds node defined with no PHY driver support\n"); 3426 goto exit; 3427 } 3428 3429 for_each_available_child_of_node_scoped(leds, led) { 3430 err = of_phy_led(phydev, led); 3431 if (err) { 3432 of_node_put(leds); 3433 phy_leds_unregister(phydev); 3434 return err; 3435 } 3436 } 3437 3438 exit: 3439 of_node_put(leds); 3440 return 0; 3441 } 3442 3443 static void phy_cleanup_ports(struct phy_device *phydev) 3444 { 3445 struct phy_port *tmp, *port; 3446 3447 list_for_each_entry_safe(port, tmp, &phydev->ports, head) { 3448 phy_del_port(phydev, port); 3449 phy_port_destroy(port); 3450 } 3451 } 3452 3453 static int phy_default_setup_single_port(struct phy_device *phydev) 3454 { 3455 struct phy_port *port = phy_port_alloc(); 3456 unsigned long mode; 3457 3458 if (!port) 3459 return -ENOMEM; 3460 3461 port->parent_type = PHY_PORT_PHY; 3462 port->phy = phydev; 3463 3464 /* Let the PHY driver know that this port was never described anywhere. 3465 * This is the usual case, where we assume single-port PHY devices with 3466 * no SFP. In that case, the port supports exactly the same thing as 3467 * the PHY itself. 3468 * 3469 * However, this can also be because we have a combo-port PHY, with 3470 * only one port described in DT, through SFP for example. 3471 * 3472 * In that case, the PHY driver will be in charge of saying what we can 3473 * do on that non-represented port. 3474 */ 3475 port->not_described = true; 3476 linkmode_copy(port->supported, phydev->supported); 3477 port->mediums = phy_caps_mediums_from_linkmodes(port->supported); 3478 3479 for_each_set_bit(mode, port->supported, __ETHTOOL_LINK_MODE_MASK_NBITS) 3480 port->pairs = max_t(int, port->pairs, 3481 ethtool_linkmode_n_pairs(mode)); 3482 3483 phy_add_port(phydev, port); 3484 3485 return 0; 3486 } 3487 3488 static int of_phy_ports(struct phy_device *phydev) 3489 { 3490 struct device_node *node = phydev->mdio.dev.of_node; 3491 struct device_node *mdi; 3492 struct phy_port *port; 3493 int err; 3494 3495 if (!IS_ENABLED(CONFIG_OF_MDIO)) 3496 return 0; 3497 3498 if (!node) 3499 return 0; 3500 3501 mdi = of_get_child_by_name(node, "mdi"); 3502 if (!mdi) 3503 return 0; 3504 3505 for_each_available_child_of_node_scoped(mdi, port_node) { 3506 port = phy_of_parse_port(port_node); 3507 if (IS_ERR(port)) { 3508 err = PTR_ERR(port); 3509 goto out_err; 3510 } 3511 3512 port->parent_type = PHY_PORT_PHY; 3513 port->phy = phydev; 3514 3515 linkmode_copy(port->supported, phydev->supported); 3516 3517 err = phy_add_port(phydev, port); 3518 if (err) { 3519 phy_port_destroy(port); 3520 goto out_err; 3521 } 3522 } 3523 of_node_put(mdi); 3524 3525 return 0; 3526 3527 out_err: 3528 phy_cleanup_ports(phydev); 3529 of_node_put(mdi); 3530 return err; 3531 } 3532 3533 static int phy_setup_ports(struct phy_device *phydev) 3534 { 3535 __ETHTOOL_DECLARE_LINK_MODE_MASK(ports_supported); 3536 struct phy_port *port; 3537 int ret; 3538 3539 ret = of_phy_ports(phydev); 3540 if (ret) 3541 return ret; 3542 3543 /* We don't support SFP with genphy drivers. Also, genphy driver 3544 * binding occurs with RTNL help, which will deadlock the call to 3545 * sfp_bus_add_upstream(). 3546 */ 3547 if (!phydev->is_genphy_driven) { 3548 ret = phy_sfp_probe(phydev); 3549 if (ret) 3550 goto out; 3551 } 3552 3553 if (phydev->n_ports < phydev->max_n_ports) { 3554 ret = phy_default_setup_single_port(phydev); 3555 if (ret) 3556 goto out; 3557 } 3558 3559 linkmode_zero(ports_supported); 3560 3561 /* Aggregate the supported modes, which are made-up of : 3562 * - What the PHY itself supports 3563 * - What the sum of all ports support 3564 */ 3565 list_for_each_entry(port, &phydev->ports, head) 3566 if (port->active) 3567 linkmode_or(ports_supported, ports_supported, 3568 port->supported); 3569 3570 if (!linkmode_empty(ports_supported)) 3571 linkmode_and(phydev->supported, phydev->supported, 3572 ports_supported); 3573 3574 /* For now, the phy->port field is set as the first active port's type */ 3575 list_for_each_entry(port, &phydev->ports, head) 3576 if (port->active) { 3577 phydev->port = phy_port_get_type(port); 3578 break; 3579 } 3580 3581 return 0; 3582 3583 out: 3584 phy_cleanup_ports(phydev); 3585 return ret; 3586 } 3587 3588 /** 3589 * phy_get_sfp_port() - Returns the first valid SFP port of a PHY 3590 * @phydev: pointer to the PHY device to get the SFP port from 3591 * 3592 * Returns: The first active SFP (serdes) port of a PHY device, NULL if none 3593 * exist. 3594 */ 3595 struct phy_port *phy_get_sfp_port(struct phy_device *phydev) 3596 { 3597 struct phy_port *port; 3598 3599 list_for_each_entry(port, &phydev->ports, head) 3600 if (port->active && port->is_sfp) 3601 return port; 3602 3603 return NULL; 3604 } 3605 EXPORT_SYMBOL_GPL(phy_get_sfp_port); 3606 3607 /** 3608 * fwnode_mdio_find_device - Given a fwnode, find the mdio_device 3609 * @fwnode: pointer to the mdio_device's fwnode 3610 * 3611 * If successful, returns a pointer to the mdio_device with the embedded 3612 * struct device refcount incremented by one, or NULL on failure. 3613 * The caller should call put_device() on the mdio_device after its use. 3614 */ 3615 struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode) 3616 { 3617 struct device *d; 3618 3619 if (!fwnode) 3620 return NULL; 3621 3622 d = bus_find_device_by_fwnode(&mdio_bus_type, fwnode); 3623 if (!d) 3624 return NULL; 3625 3626 return to_mdio_device(d); 3627 } 3628 EXPORT_SYMBOL(fwnode_mdio_find_device); 3629 3630 /** 3631 * fwnode_phy_find_device - For provided phy_fwnode, find phy_device. 3632 * 3633 * @phy_fwnode: Pointer to the phy's fwnode. 3634 * 3635 * If successful, returns a pointer to the phy_device with the embedded 3636 * struct device refcount incremented by one, or NULL on failure. 3637 */ 3638 struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode) 3639 { 3640 struct mdio_device *mdiodev; 3641 3642 mdiodev = fwnode_mdio_find_device(phy_fwnode); 3643 if (!mdiodev) 3644 return NULL; 3645 3646 if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY) 3647 return to_phy_device(&mdiodev->dev); 3648 3649 put_device(&mdiodev->dev); 3650 3651 return NULL; 3652 } 3653 EXPORT_SYMBOL(fwnode_phy_find_device); 3654 3655 /** 3656 * fwnode_get_phy_node - Get the phy_node using the named reference. 3657 * @fwnode: Pointer to fwnode from which phy_node has to be obtained. 3658 * 3659 * Refer return conditions of fwnode_find_reference(). 3660 * For ACPI, only "phy-handle" is supported. Legacy DT properties "phy" 3661 * and "phy-device" are not supported in ACPI. DT supports all the three 3662 * named references to the phy node. 3663 */ 3664 struct fwnode_handle *fwnode_get_phy_node(const struct fwnode_handle *fwnode) 3665 { 3666 struct fwnode_handle *phy_node; 3667 3668 /* Only phy-handle is used for ACPI */ 3669 phy_node = fwnode_find_reference(fwnode, "phy-handle", 0); 3670 if (!IS_ERR(phy_node) || is_acpi_node(fwnode)) 3671 return phy_node; 3672 phy_node = fwnode_find_reference(fwnode, "phy", 0); 3673 if (!IS_ERR(phy_node)) 3674 return phy_node; 3675 return fwnode_find_reference(fwnode, "phy-device", 0); 3676 } 3677 EXPORT_SYMBOL_GPL(fwnode_get_phy_node); 3678 3679 /** 3680 * phy_probe - probe and init a PHY device 3681 * @dev: device to probe and init 3682 * 3683 * Take care of setting up the phy_device structure, set the state to READY. 3684 */ 3685 static int phy_probe(struct device *dev) 3686 { 3687 struct phy_device *phydev = to_phy_device(dev); 3688 struct device_driver *drv = phydev->mdio.dev.driver; 3689 struct phy_driver *phydrv = to_phy_driver(drv); 3690 int err = 0; 3691 3692 phydev->drv = phydrv; 3693 3694 /* Disable the interrupt if the PHY doesn't support it 3695 * but the interrupt is still a valid one 3696 */ 3697 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev)) 3698 phydev->irq = PHY_POLL; 3699 3700 if (phydrv->flags & PHY_IS_INTERNAL) 3701 phydev->is_internal = true; 3702 3703 /* Deassert the reset signal */ 3704 phy_device_reset(phydev, 0); 3705 3706 if (phydev->drv->probe) { 3707 err = phydev->drv->probe(phydev); 3708 if (err) 3709 goto out; 3710 } 3711 3712 phy_disable_interrupts(phydev); 3713 3714 /* Start out supporting everything. Eventually, 3715 * a controller will attach, and may modify one 3716 * or both of these values 3717 */ 3718 if (phydrv->features) { 3719 linkmode_copy(phydev->supported, phydrv->features); 3720 genphy_c45_read_eee_abilities(phydev); 3721 } 3722 else if (phydrv->get_features) 3723 err = phydrv->get_features(phydev); 3724 else if (phydev->is_c45) 3725 err = genphy_c45_pma_read_abilities(phydev); 3726 else 3727 err = genphy_read_abilities(phydev); 3728 3729 if (err) 3730 goto out; 3731 3732 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 3733 phydev->supported)) 3734 phydev->autoneg = 0; 3735 3736 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 3737 phydev->supported)) 3738 phydev->is_gigabit_capable = 1; 3739 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 3740 phydev->supported)) 3741 phydev->is_gigabit_capable = 1; 3742 3743 of_set_phy_supported(phydev); 3744 3745 err = phy_setup_ports(phydev); 3746 if (err) 3747 goto out; 3748 3749 phy_advertise_supported(phydev); 3750 3751 /* Get PHY default EEE advertising modes and handle them as potentially 3752 * safe initial configuration. 3753 */ 3754 err = genphy_c45_read_eee_adv(phydev, phydev->advertising_eee); 3755 if (err) 3756 goto out; 3757 3758 /* Get the EEE modes we want to prohibit. */ 3759 of_set_phy_eee_broken(phydev); 3760 3761 /* Some PHYs may advertise, by default, not support EEE modes. So, 3762 * we need to clean them. In addition remove all disabled EEE modes. 3763 */ 3764 linkmode_and(phydev->advertising_eee, phydev->supported_eee, 3765 phydev->advertising_eee); 3766 linkmode_andnot(phydev->advertising_eee, phydev->advertising_eee, 3767 phydev->eee_disabled_modes); 3768 3769 /* There is no "enabled" flag. If PHY is advertising, assume it is 3770 * kind of enabled. 3771 */ 3772 phydev->eee_cfg.eee_enabled = !linkmode_empty(phydev->advertising_eee); 3773 3774 /* Get master/slave strap overrides */ 3775 of_set_phy_timing_role(phydev); 3776 3777 /* The Pause Frame bits indicate that the PHY can support passing 3778 * pause frames. During autonegotiation, the PHYs will determine if 3779 * they should allow pause frames to pass. The MAC driver should then 3780 * use that result to determine whether to enable flow control via 3781 * pause frames. 3782 * 3783 * Normally, PHY drivers should not set the Pause bits, and instead 3784 * allow phylib to do that. However, there may be some situations 3785 * (e.g. hardware erratum) where the driver wants to set only one 3786 * of these bits. 3787 */ 3788 if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) && 3789 !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) { 3790 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 3791 phydev->supported); 3792 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 3793 phydev->supported); 3794 } 3795 3796 /* Set the state to READY by default */ 3797 phydev->state = PHY_READY; 3798 3799 /* Register the PHY LED triggers */ 3800 if (!phydev->is_on_sfp_module) 3801 phy_led_triggers_register(phydev); 3802 3803 /* Get the LEDs from the device tree, and instantiate standard 3804 * LEDs for them. 3805 */ 3806 if (IS_ENABLED(CONFIG_PHYLIB_LEDS) && !phy_driver_is_genphy(phydev)) { 3807 err = of_phy_leds(phydev); 3808 if (err) 3809 goto out; 3810 } 3811 3812 return 0; 3813 3814 out: 3815 sfp_bus_del_upstream(phydev->sfp_bus); 3816 phydev->sfp_bus = NULL; 3817 3818 phy_cleanup_ports(phydev); 3819 3820 if (!phydev->is_on_sfp_module) 3821 phy_led_triggers_unregister(phydev); 3822 3823 /* Re-assert the reset signal on error */ 3824 phy_device_reset(phydev, 1); 3825 3826 return err; 3827 } 3828 3829 static int phy_remove(struct device *dev) 3830 { 3831 struct phy_device *phydev = to_phy_device(dev); 3832 3833 cancel_delayed_work_sync(&phydev->state_queue); 3834 3835 if (IS_ENABLED(CONFIG_PHYLIB_LEDS) && !phy_driver_is_genphy(phydev)) 3836 phy_leds_unregister(phydev); 3837 3838 if (!phydev->is_on_sfp_module) 3839 phy_led_triggers_unregister(phydev); 3840 3841 phydev->state = PHY_DOWN; 3842 3843 sfp_bus_del_upstream(phydev->sfp_bus); 3844 phydev->sfp_bus = NULL; 3845 3846 phy_cleanup_ports(phydev); 3847 3848 if (phydev->drv && phydev->drv->remove) 3849 phydev->drv->remove(phydev); 3850 3851 /* Assert the reset signal */ 3852 phy_device_reset(phydev, 1); 3853 3854 phydev->drv = NULL; 3855 3856 return 0; 3857 } 3858 3859 /** 3860 * phy_driver_register - register a phy_driver with the PHY layer 3861 * @new_driver: new phy_driver to register 3862 * @owner: module owning this PHY 3863 */ 3864 static int phy_driver_register(struct phy_driver *new_driver, 3865 struct module *owner) 3866 { 3867 int retval; 3868 3869 /* Either the features are hard coded, or dynamically 3870 * determined. It cannot be both. 3871 */ 3872 if (WARN_ON(new_driver->features && new_driver->get_features)) { 3873 pr_err("%s: features and get_features must not both be set\n", 3874 new_driver->name); 3875 return -EINVAL; 3876 } 3877 3878 /* PHYLIB device drivers must not match using a DT compatible table 3879 * as this bypasses our checks that the mdiodev that is being matched 3880 * is backed by a struct phy_device. If such a case happens, we will 3881 * make out-of-bounds accesses and lockup in phydev->lock. 3882 */ 3883 if (WARN(new_driver->mdiodrv.driver.of_match_table, 3884 "%s: driver must not provide a DT match table\n", 3885 new_driver->name)) 3886 return -EINVAL; 3887 3888 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY; 3889 new_driver->mdiodrv.driver.name = new_driver->name; 3890 new_driver->mdiodrv.driver.bus = &mdio_bus_type; 3891 new_driver->mdiodrv.driver.probe = phy_probe; 3892 new_driver->mdiodrv.driver.remove = phy_remove; 3893 new_driver->mdiodrv.driver.owner = owner; 3894 new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS; 3895 3896 retval = driver_register(&new_driver->mdiodrv.driver); 3897 if (retval) { 3898 pr_err("%s: Error %d in registering driver\n", 3899 new_driver->name, retval); 3900 3901 return retval; 3902 } 3903 3904 pr_debug("%s: Registered new driver\n", new_driver->name); 3905 3906 return 0; 3907 } 3908 3909 static void phy_driver_unregister(struct phy_driver *drv) 3910 { 3911 driver_unregister(&drv->mdiodrv.driver); 3912 } 3913 3914 int phy_drivers_register(struct phy_driver *new_driver, int n, 3915 struct module *owner) 3916 { 3917 int i, ret = 0; 3918 3919 for (i = 0; i < n; i++) { 3920 ret = phy_driver_register(new_driver + i, owner); 3921 if (ret) { 3922 while (i-- > 0) 3923 phy_driver_unregister(new_driver + i); 3924 break; 3925 } 3926 } 3927 return ret; 3928 } 3929 EXPORT_SYMBOL(phy_drivers_register); 3930 3931 void phy_drivers_unregister(struct phy_driver *drv, int n) 3932 { 3933 int i; 3934 3935 for (i = 0; i < n; i++) 3936 phy_driver_unregister(drv + i); 3937 } 3938 EXPORT_SYMBOL(phy_drivers_unregister); 3939 3940 static struct phy_driver genphy_driver = { 3941 .phy_id = 0xffffffff, 3942 .phy_id_mask = 0xffffffff, 3943 .name = "Generic PHY", 3944 .get_features = genphy_read_abilities, 3945 .suspend = genphy_suspend, 3946 .resume = genphy_resume, 3947 .set_loopback = genphy_loopback, 3948 }; 3949 3950 static const struct ethtool_phy_ops phy_ethtool_phy_ops = { 3951 .get_sset_count = phy_ethtool_get_sset_count, 3952 .get_strings = phy_ethtool_get_strings, 3953 .get_stats = phy_ethtool_get_stats, 3954 .get_plca_cfg = phy_ethtool_get_plca_cfg, 3955 .set_plca_cfg = phy_ethtool_set_plca_cfg, 3956 .get_plca_status = phy_ethtool_get_plca_status, 3957 .start_cable_test = phy_start_cable_test, 3958 .start_cable_test_tdr = phy_start_cable_test_tdr, 3959 }; 3960 3961 static const struct phylib_stubs __phylib_stubs = { 3962 .hwtstamp_get = __phy_hwtstamp_get, 3963 .hwtstamp_set = __phy_hwtstamp_set, 3964 .get_phy_stats = __phy_ethtool_get_phy_stats, 3965 .get_link_ext_stats = __phy_ethtool_get_link_ext_stats, 3966 }; 3967 3968 static void phylib_register_stubs(void) 3969 { 3970 phylib_stubs = &__phylib_stubs; 3971 } 3972 3973 static void phylib_unregister_stubs(void) 3974 { 3975 phylib_stubs = NULL; 3976 } 3977 3978 static int __init phy_init(void) 3979 { 3980 int rc; 3981 3982 rc = class_register(&mdio_bus_class); 3983 if (rc) 3984 return rc; 3985 3986 rc = bus_register(&mdio_bus_type); 3987 if (rc) 3988 goto err_class; 3989 3990 rtnl_lock(); 3991 ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops); 3992 phylib_register_stubs(); 3993 rtnl_unlock(); 3994 3995 rc = phy_caps_init(); 3996 if (rc) 3997 goto err_ethtool_phy_ops; 3998 3999 features_init(); 4000 4001 rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE); 4002 if (rc) 4003 goto err_ethtool_phy_ops; 4004 4005 rc = phy_driver_register(&genphy_driver, THIS_MODULE); 4006 if (rc) 4007 goto err_c45; 4008 4009 return 0; 4010 4011 err_c45: 4012 phy_driver_unregister(&genphy_c45_driver); 4013 err_ethtool_phy_ops: 4014 rtnl_lock(); 4015 phylib_unregister_stubs(); 4016 ethtool_set_ethtool_phy_ops(NULL); 4017 rtnl_unlock(); 4018 bus_unregister(&mdio_bus_type); 4019 err_class: 4020 class_unregister(&mdio_bus_class); 4021 4022 return rc; 4023 } 4024 4025 static void __exit phy_exit(void) 4026 { 4027 phy_driver_unregister(&genphy_c45_driver); 4028 phy_driver_unregister(&genphy_driver); 4029 rtnl_lock(); 4030 phylib_unregister_stubs(); 4031 ethtool_set_ethtool_phy_ops(NULL); 4032 rtnl_unlock(); 4033 bus_unregister(&mdio_bus_type); 4034 class_unregister(&mdio_bus_class); 4035 } 4036 4037 subsys_initcall(phy_init); 4038 module_exit(phy_exit); 4039