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/bitmap.h> 13#include <linux/delay.h> 14#include <linux/errno.h> 15#include <linux/etherdevice.h> 16#include <linux/ethtool.h> 17#include <linux/init.h> 18#include <linux/interrupt.h> 19#include <linux/io.h> 20#include <linux/kernel.h> 21#include <linux/mdio.h> 22#include <linux/mii.h> 23#include <linux/mm.h> 24#include <linux/module.h> 25#include <linux/netdevice.h> 26#include <linux/phy.h> 27#include <linux/phy_led_triggers.h> 28#include <linux/property.h> 29#include <linux/sfp.h> 30#include <linux/skbuff.h> 31#include <linux/slab.h> 32#include <linux/string.h> 33#include <linux/uaccess.h> 34#include <linux/unistd.h> 35 36MODULE_DESCRIPTION("PHY library"); 37MODULE_AUTHOR("Andy Fleming"); 38MODULE_LICENSE("GPL"); 39 40__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_features) __ro_after_init; 41EXPORT_SYMBOL_GPL(phy_basic_features); 42 43__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1_features) __ro_after_init; 44EXPORT_SYMBOL_GPL(phy_basic_t1_features); 45 46__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_features) __ro_after_init; 47EXPORT_SYMBOL_GPL(phy_gbit_features); 48 49__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_fibre_features) __ro_after_init; 50EXPORT_SYMBOL_GPL(phy_gbit_fibre_features); 51 52__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_all_ports_features) __ro_after_init; 53EXPORT_SYMBOL_GPL(phy_gbit_all_ports_features); 54 55__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_features) __ro_after_init; 56EXPORT_SYMBOL_GPL(phy_10gbit_features); 57 58__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_fec_features) __ro_after_init; 59EXPORT_SYMBOL_GPL(phy_10gbit_fec_features); 60 61const int phy_basic_ports_array[3] = { 62 ETHTOOL_LINK_MODE_Autoneg_BIT, 63 ETHTOOL_LINK_MODE_TP_BIT, 64 ETHTOOL_LINK_MODE_MII_BIT, 65}; 66EXPORT_SYMBOL_GPL(phy_basic_ports_array); 67 68const int phy_fibre_port_array[1] = { 69 ETHTOOL_LINK_MODE_FIBRE_BIT, 70}; 71EXPORT_SYMBOL_GPL(phy_fibre_port_array); 72 73const int phy_all_ports_features_array[7] = { 74 ETHTOOL_LINK_MODE_Autoneg_BIT, 75 ETHTOOL_LINK_MODE_TP_BIT, 76 ETHTOOL_LINK_MODE_MII_BIT, 77 ETHTOOL_LINK_MODE_FIBRE_BIT, 78 ETHTOOL_LINK_MODE_AUI_BIT, 79 ETHTOOL_LINK_MODE_BNC_BIT, 80 ETHTOOL_LINK_MODE_Backplane_BIT, 81}; 82EXPORT_SYMBOL_GPL(phy_all_ports_features_array); 83 84const int phy_10_100_features_array[4] = { 85 ETHTOOL_LINK_MODE_10baseT_Half_BIT, 86 ETHTOOL_LINK_MODE_10baseT_Full_BIT, 87 ETHTOOL_LINK_MODE_100baseT_Half_BIT, 88 ETHTOOL_LINK_MODE_100baseT_Full_BIT, 89}; 90EXPORT_SYMBOL_GPL(phy_10_100_features_array); 91 92const int phy_basic_t1_features_array[2] = { 93 ETHTOOL_LINK_MODE_TP_BIT, 94 ETHTOOL_LINK_MODE_100baseT1_Full_BIT, 95}; 96EXPORT_SYMBOL_GPL(phy_basic_t1_features_array); 97 98const int phy_gbit_features_array[2] = { 99 ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 100 ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 101}; 102EXPORT_SYMBOL_GPL(phy_gbit_features_array); 103 104const int phy_10gbit_features_array[1] = { 105 ETHTOOL_LINK_MODE_10000baseT_Full_BIT, 106}; 107EXPORT_SYMBOL_GPL(phy_10gbit_features_array); 108 109static const int phy_10gbit_fec_features_array[1] = { 110 ETHTOOL_LINK_MODE_10000baseR_FEC_BIT, 111}; 112 113__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_full_features) __ro_after_init; 114EXPORT_SYMBOL_GPL(phy_10gbit_full_features); 115 116static const int phy_10gbit_full_features_array[] = { 117 ETHTOOL_LINK_MODE_10baseT_Full_BIT, 118 ETHTOOL_LINK_MODE_100baseT_Full_BIT, 119 ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 120 ETHTOOL_LINK_MODE_10000baseT_Full_BIT, 121}; 122 123static void features_init(void) 124{ 125 /* 10/100 half/full*/ 126 linkmode_set_bit_array(phy_basic_ports_array, 127 ARRAY_SIZE(phy_basic_ports_array), 128 phy_basic_features); 129 linkmode_set_bit_array(phy_10_100_features_array, 130 ARRAY_SIZE(phy_10_100_features_array), 131 phy_basic_features); 132 133 /* 100 full, TP */ 134 linkmode_set_bit_array(phy_basic_t1_features_array, 135 ARRAY_SIZE(phy_basic_t1_features_array), 136 phy_basic_t1_features); 137 138 /* 10/100 half/full + 1000 half/full */ 139 linkmode_set_bit_array(phy_basic_ports_array, 140 ARRAY_SIZE(phy_basic_ports_array), 141 phy_gbit_features); 142 linkmode_set_bit_array(phy_10_100_features_array, 143 ARRAY_SIZE(phy_10_100_features_array), 144 phy_gbit_features); 145 linkmode_set_bit_array(phy_gbit_features_array, 146 ARRAY_SIZE(phy_gbit_features_array), 147 phy_gbit_features); 148 149 /* 10/100 half/full + 1000 half/full + fibre*/ 150 linkmode_set_bit_array(phy_basic_ports_array, 151 ARRAY_SIZE(phy_basic_ports_array), 152 phy_gbit_fibre_features); 153 linkmode_set_bit_array(phy_10_100_features_array, 154 ARRAY_SIZE(phy_10_100_features_array), 155 phy_gbit_fibre_features); 156 linkmode_set_bit_array(phy_gbit_features_array, 157 ARRAY_SIZE(phy_gbit_features_array), 158 phy_gbit_fibre_features); 159 linkmode_set_bit_array(phy_fibre_port_array, 160 ARRAY_SIZE(phy_fibre_port_array), 161 phy_gbit_fibre_features); 162 163 /* 10/100 half/full + 1000 half/full + TP/MII/FIBRE/AUI/BNC/Backplane*/ 164 linkmode_set_bit_array(phy_all_ports_features_array, 165 ARRAY_SIZE(phy_all_ports_features_array), 166 phy_gbit_all_ports_features); 167 linkmode_set_bit_array(phy_10_100_features_array, 168 ARRAY_SIZE(phy_10_100_features_array), 169 phy_gbit_all_ports_features); 170 linkmode_set_bit_array(phy_gbit_features_array, 171 ARRAY_SIZE(phy_gbit_features_array), 172 phy_gbit_all_ports_features); 173 174 /* 10/100 half/full + 1000 half/full + 10G full*/ 175 linkmode_set_bit_array(phy_all_ports_features_array, 176 ARRAY_SIZE(phy_all_ports_features_array), 177 phy_10gbit_features); 178 linkmode_set_bit_array(phy_10_100_features_array, 179 ARRAY_SIZE(phy_10_100_features_array), 180 phy_10gbit_features); 181 linkmode_set_bit_array(phy_gbit_features_array, 182 ARRAY_SIZE(phy_gbit_features_array), 183 phy_10gbit_features); 184 linkmode_set_bit_array(phy_10gbit_features_array, 185 ARRAY_SIZE(phy_10gbit_features_array), 186 phy_10gbit_features); 187 188 /* 10/100/1000/10G full */ 189 linkmode_set_bit_array(phy_all_ports_features_array, 190 ARRAY_SIZE(phy_all_ports_features_array), 191 phy_10gbit_full_features); 192 linkmode_set_bit_array(phy_10gbit_full_features_array, 193 ARRAY_SIZE(phy_10gbit_full_features_array), 194 phy_10gbit_full_features); 195 /* 10G FEC only */ 196 linkmode_set_bit_array(phy_10gbit_fec_features_array, 197 ARRAY_SIZE(phy_10gbit_fec_features_array), 198 phy_10gbit_fec_features); 199} 200 201void phy_device_free(struct phy_device *phydev) 202{ 203 put_device(&phydev->mdio.dev); 204} 205EXPORT_SYMBOL(phy_device_free); 206 207static void phy_mdio_device_free(struct mdio_device *mdiodev) 208{ 209 struct phy_device *phydev; 210 211 phydev = container_of(mdiodev, struct phy_device, mdio); 212 phy_device_free(phydev); 213} 214 215static void phy_device_release(struct device *dev) 216{ 217 kfree(to_phy_device(dev)); 218} 219 220static void phy_mdio_device_remove(struct mdio_device *mdiodev) 221{ 222 struct phy_device *phydev; 223 224 phydev = container_of(mdiodev, struct phy_device, mdio); 225 phy_device_remove(phydev); 226} 227 228static struct phy_driver genphy_driver; 229 230static LIST_HEAD(phy_fixup_list); 231static DEFINE_MUTEX(phy_fixup_lock); 232 233static bool mdio_bus_phy_may_suspend(struct phy_device *phydev) 234{ 235 struct device_driver *drv = phydev->mdio.dev.driver; 236 struct phy_driver *phydrv = to_phy_driver(drv); 237 struct net_device *netdev = phydev->attached_dev; 238 239 if (!drv || !phydrv->suspend) 240 return false; 241 242 /* PHY not attached? May suspend if the PHY has not already been 243 * suspended as part of a prior call to phy_disconnect() -> 244 * phy_detach() -> phy_suspend() because the parent netdev might be the 245 * MDIO bus driver and clock gated at this point. 246 */ 247 if (!netdev) 248 goto out; 249 250 if (netdev->wol_enabled) 251 return false; 252 253 /* As long as not all affected network drivers support the 254 * wol_enabled flag, let's check for hints that WoL is enabled. 255 * Don't suspend PHY if the attached netdev parent may wake up. 256 * The parent may point to a PCI device, as in tg3 driver. 257 */ 258 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent)) 259 return false; 260 261 /* Also don't suspend PHY if the netdev itself may wakeup. This 262 * is the case for devices w/o underlaying pwr. mgmt. aware bus, 263 * e.g. SoC devices. 264 */ 265 if (device_may_wakeup(&netdev->dev)) 266 return false; 267 268out: 269 return !phydev->suspended; 270} 271 272static __maybe_unused int mdio_bus_phy_suspend(struct device *dev) 273{ 274 struct phy_device *phydev = to_phy_device(dev); 275 276 /* We must stop the state machine manually, otherwise it stops out of 277 * control, possibly with the phydev->lock held. Upon resume, netdev 278 * may call phy routines that try to grab the same lock, and that may 279 * lead to a deadlock. 280 */ 281 if (phydev->attached_dev && phydev->adjust_link) 282 phy_stop_machine(phydev); 283 284 if (!mdio_bus_phy_may_suspend(phydev)) 285 return 0; 286 287 phydev->suspended_by_mdio_bus = 1; 288 289 return phy_suspend(phydev); 290} 291 292static __maybe_unused int mdio_bus_phy_resume(struct device *dev) 293{ 294 struct phy_device *phydev = to_phy_device(dev); 295 int ret; 296 297 if (!phydev->suspended_by_mdio_bus) 298 goto no_resume; 299 300 phydev->suspended_by_mdio_bus = 0; 301 302 ret = phy_init_hw(phydev); 303 if (ret < 0) 304 return ret; 305 306 ret = phy_resume(phydev); 307 if (ret < 0) 308 return ret; 309no_resume: 310 if (phydev->attached_dev && phydev->adjust_link) 311 phy_start_machine(phydev); 312 313 return 0; 314} 315 316static SIMPLE_DEV_PM_OPS(mdio_bus_phy_pm_ops, mdio_bus_phy_suspend, 317 mdio_bus_phy_resume); 318 319/** 320 * phy_register_fixup - creates a new phy_fixup and adds it to the list 321 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID) 322 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) 323 * It can also be PHY_ANY_UID 324 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before 325 * comparison 326 * @run: The actual code to be run when a matching PHY is found 327 */ 328int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, 329 int (*run)(struct phy_device *)) 330{ 331 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); 332 333 if (!fixup) 334 return -ENOMEM; 335 336 strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); 337 fixup->phy_uid = phy_uid; 338 fixup->phy_uid_mask = phy_uid_mask; 339 fixup->run = run; 340 341 mutex_lock(&phy_fixup_lock); 342 list_add_tail(&fixup->list, &phy_fixup_list); 343 mutex_unlock(&phy_fixup_lock); 344 345 return 0; 346} 347EXPORT_SYMBOL(phy_register_fixup); 348 349/* Registers a fixup to be run on any PHY with the UID in phy_uid */ 350int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, 351 int (*run)(struct phy_device *)) 352{ 353 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); 354} 355EXPORT_SYMBOL(phy_register_fixup_for_uid); 356 357/* Registers a fixup to be run on the PHY with id string bus_id */ 358int phy_register_fixup_for_id(const char *bus_id, 359 int (*run)(struct phy_device *)) 360{ 361 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); 362} 363EXPORT_SYMBOL(phy_register_fixup_for_id); 364 365/** 366 * phy_unregister_fixup - remove a phy_fixup from the list 367 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list 368 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list 369 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison 370 */ 371int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask) 372{ 373 struct list_head *pos, *n; 374 struct phy_fixup *fixup; 375 int ret; 376 377 ret = -ENODEV; 378 379 mutex_lock(&phy_fixup_lock); 380 list_for_each_safe(pos, n, &phy_fixup_list) { 381 fixup = list_entry(pos, struct phy_fixup, list); 382 383 if ((!strcmp(fixup->bus_id, bus_id)) && 384 ((fixup->phy_uid & phy_uid_mask) == 385 (phy_uid & phy_uid_mask))) { 386 list_del(&fixup->list); 387 kfree(fixup); 388 ret = 0; 389 break; 390 } 391 } 392 mutex_unlock(&phy_fixup_lock); 393 394 return ret; 395} 396EXPORT_SYMBOL(phy_unregister_fixup); 397 398/* Unregisters a fixup of any PHY with the UID in phy_uid */ 399int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask) 400{ 401 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask); 402} 403EXPORT_SYMBOL(phy_unregister_fixup_for_uid); 404 405/* Unregisters a fixup of the PHY with id string bus_id */ 406int phy_unregister_fixup_for_id(const char *bus_id) 407{ 408 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff); 409} 410EXPORT_SYMBOL(phy_unregister_fixup_for_id); 411 412/* Returns 1 if fixup matches phydev in bus_id and phy_uid. 413 * Fixups can be set to match any in one or more fields. 414 */ 415static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) 416{ 417 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0) 418 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) 419 return 0; 420 421 if ((fixup->phy_uid & fixup->phy_uid_mask) != 422 (phydev->phy_id & fixup->phy_uid_mask)) 423 if (fixup->phy_uid != PHY_ANY_UID) 424 return 0; 425 426 return 1; 427} 428 429/* Runs any matching fixups for this phydev */ 430static int phy_scan_fixups(struct phy_device *phydev) 431{ 432 struct phy_fixup *fixup; 433 434 mutex_lock(&phy_fixup_lock); 435 list_for_each_entry(fixup, &phy_fixup_list, list) { 436 if (phy_needs_fixup(phydev, fixup)) { 437 int err = fixup->run(phydev); 438 439 if (err < 0) { 440 mutex_unlock(&phy_fixup_lock); 441 return err; 442 } 443 phydev->has_fixups = true; 444 } 445 } 446 mutex_unlock(&phy_fixup_lock); 447 448 return 0; 449} 450 451static int phy_bus_match(struct device *dev, struct device_driver *drv) 452{ 453 struct phy_device *phydev = to_phy_device(dev); 454 struct phy_driver *phydrv = to_phy_driver(drv); 455 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids); 456 int i; 457 458 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY)) 459 return 0; 460 461 if (phydrv->match_phy_device) 462 return phydrv->match_phy_device(phydev); 463 464 if (phydev->is_c45) { 465 for (i = 1; i < num_ids; i++) { 466 if (phydev->c45_ids.device_ids[i] == 0xffffffff) 467 continue; 468 469 if ((phydrv->phy_id & phydrv->phy_id_mask) == 470 (phydev->c45_ids.device_ids[i] & 471 phydrv->phy_id_mask)) 472 return 1; 473 } 474 return 0; 475 } else { 476 return (phydrv->phy_id & phydrv->phy_id_mask) == 477 (phydev->phy_id & phydrv->phy_id_mask); 478 } 479} 480 481static ssize_t 482phy_id_show(struct device *dev, struct device_attribute *attr, char *buf) 483{ 484 struct phy_device *phydev = to_phy_device(dev); 485 486 return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id); 487} 488static DEVICE_ATTR_RO(phy_id); 489 490static ssize_t 491phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf) 492{ 493 struct phy_device *phydev = to_phy_device(dev); 494 const char *mode = NULL; 495 496 if (phy_is_internal(phydev)) 497 mode = "internal"; 498 else 499 mode = phy_modes(phydev->interface); 500 501 return sprintf(buf, "%s\n", mode); 502} 503static DEVICE_ATTR_RO(phy_interface); 504 505static ssize_t 506phy_has_fixups_show(struct device *dev, struct device_attribute *attr, 507 char *buf) 508{ 509 struct phy_device *phydev = to_phy_device(dev); 510 511 return sprintf(buf, "%d\n", phydev->has_fixups); 512} 513static DEVICE_ATTR_RO(phy_has_fixups); 514 515static struct attribute *phy_dev_attrs[] = { 516 &dev_attr_phy_id.attr, 517 &dev_attr_phy_interface.attr, 518 &dev_attr_phy_has_fixups.attr, 519 NULL, 520}; 521ATTRIBUTE_GROUPS(phy_dev); 522 523static const struct device_type mdio_bus_phy_type = { 524 .name = "PHY", 525 .groups = phy_dev_groups, 526 .release = phy_device_release, 527 .pm = pm_ptr(&mdio_bus_phy_pm_ops), 528}; 529 530static int phy_request_driver_module(struct phy_device *dev, u32 phy_id) 531{ 532 int ret; 533 534 ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, 535 MDIO_ID_ARGS(phy_id)); 536 /* We only check for failures in executing the usermode binary, 537 * not whether a PHY driver module exists for the PHY ID. 538 * Accept -ENOENT because this may occur in case no initramfs exists, 539 * then modprobe isn't available. 540 */ 541 if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) { 542 phydev_err(dev, "error %d loading PHY driver module for ID 0x%08lx\n", 543 ret, (unsigned long)phy_id); 544 return ret; 545 } 546 547 return 0; 548} 549 550struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id, 551 bool is_c45, 552 struct phy_c45_device_ids *c45_ids) 553{ 554 struct phy_device *dev; 555 struct mdio_device *mdiodev; 556 int ret = 0; 557 558 /* We allocate the device, and initialize the default values */ 559 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 560 if (!dev) 561 return ERR_PTR(-ENOMEM); 562 563 mdiodev = &dev->mdio; 564 mdiodev->dev.parent = &bus->dev; 565 mdiodev->dev.bus = &mdio_bus_type; 566 mdiodev->dev.type = &mdio_bus_phy_type; 567 mdiodev->bus = bus; 568 mdiodev->bus_match = phy_bus_match; 569 mdiodev->addr = addr; 570 mdiodev->flags = MDIO_DEVICE_FLAG_PHY; 571 mdiodev->device_free = phy_mdio_device_free; 572 mdiodev->device_remove = phy_mdio_device_remove; 573 574 dev->speed = SPEED_UNKNOWN; 575 dev->duplex = DUPLEX_UNKNOWN; 576 dev->pause = 0; 577 dev->asym_pause = 0; 578 dev->link = 0; 579 dev->port = PORT_TP; 580 dev->interface = PHY_INTERFACE_MODE_GMII; 581 582 dev->autoneg = AUTONEG_ENABLE; 583 584 dev->is_c45 = is_c45; 585 dev->phy_id = phy_id; 586 if (c45_ids) 587 dev->c45_ids = *c45_ids; 588 dev->irq = bus->irq[addr]; 589 590 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr); 591 device_initialize(&mdiodev->dev); 592 593 dev->state = PHY_DOWN; 594 595 mutex_init(&dev->lock); 596 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); 597 598 /* Request the appropriate module unconditionally; don't 599 * bother trying to do so only if it isn't already loaded, 600 * because that gets complicated. A hotplug event would have 601 * done an unconditional modprobe anyway. 602 * We don't do normal hotplug because it won't work for MDIO 603 * -- because it relies on the device staying around for long 604 * enough for the driver to get loaded. With MDIO, the NIC 605 * driver will get bored and give up as soon as it finds that 606 * there's no driver _already_ loaded. 607 */ 608 if (is_c45 && c45_ids) { 609 const int num_ids = ARRAY_SIZE(c45_ids->device_ids); 610 int i; 611 612 for (i = 1; i < num_ids; i++) { 613 if (c45_ids->device_ids[i] == 0xffffffff) 614 continue; 615 616 ret = phy_request_driver_module(dev, 617 c45_ids->device_ids[i]); 618 if (ret) 619 break; 620 } 621 } else { 622 ret = phy_request_driver_module(dev, phy_id); 623 } 624 625 if (ret) { 626 put_device(&mdiodev->dev); 627 dev = ERR_PTR(ret); 628 } 629 630 return dev; 631} 632EXPORT_SYMBOL(phy_device_create); 633 634/* phy_c45_probe_present - checks to see if a MMD is present in the package 635 * @bus: the target MII bus 636 * @prtad: PHY package address on the MII bus 637 * @devad: PHY device (MMD) address 638 * 639 * Read the MDIO_STAT2 register, and check whether a device is responding 640 * at this address. 641 * 642 * Returns: negative error number on bus access error, zero if no device 643 * is responding, or positive if a device is present. 644 */ 645static int phy_c45_probe_present(struct mii_bus *bus, int prtad, int devad) 646{ 647 int stat2; 648 649 stat2 = mdiobus_c45_read(bus, prtad, devad, MDIO_STAT2); 650 if (stat2 < 0) 651 return stat2; 652 653 return (stat2 & MDIO_STAT2_DEVPRST) == MDIO_STAT2_DEVPRST_VAL; 654} 655 656/* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers. 657 * @bus: the target MII bus 658 * @addr: PHY address on the MII bus 659 * @dev_addr: MMD address in the PHY. 660 * @devices_in_package: where to store the devices in package information. 661 * 662 * Description: reads devices in package registers of a MMD at @dev_addr 663 * from PHY at @addr on @bus. 664 * 665 * Returns: 0 on success, -EIO on failure. 666 */ 667static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr, 668 u32 *devices_in_package) 669{ 670 int phy_reg; 671 672 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS2); 673 if (phy_reg < 0) 674 return -EIO; 675 *devices_in_package = phy_reg << 16; 676 677 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS1); 678 if (phy_reg < 0) 679 return -EIO; 680 *devices_in_package |= phy_reg; 681 682 return 0; 683} 684 685/** 686 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. 687 * @bus: the target MII bus 688 * @addr: PHY address on the MII bus 689 * @c45_ids: where to store the c45 ID information. 690 * 691 * Read the PHY "devices in package". If this appears to be valid, read 692 * the PHY identifiers for each device. Return the "devices in package" 693 * and identifiers in @c45_ids. 694 * 695 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if 696 * the "devices in package" is invalid. 697 */ 698static int get_phy_c45_ids(struct mii_bus *bus, int addr, 699 struct phy_c45_device_ids *c45_ids) 700{ 701 const int num_ids = ARRAY_SIZE(c45_ids->device_ids); 702 u32 devs_in_pkg = 0; 703 int i, ret, phy_reg; 704 705 /* Find first non-zero Devices In package. Device zero is reserved 706 * for 802.3 c45 complied PHYs, so don't probe it at first. 707 */ 708 for (i = 1; i < MDIO_MMD_NUM && (devs_in_pkg == 0 || 709 (devs_in_pkg & 0x1fffffff) == 0x1fffffff); i++) { 710 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) { 711 /* Check that there is a device present at this 712 * address before reading the devices-in-package 713 * register to avoid reading garbage from the PHY. 714 * Some PHYs (88x3310) vendor space is not IEEE802.3 715 * compliant. 716 */ 717 ret = phy_c45_probe_present(bus, addr, i); 718 if (ret < 0) 719 return -EIO; 720 721 if (!ret) 722 continue; 723 } 724 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, &devs_in_pkg); 725 if (phy_reg < 0) 726 return -EIO; 727 } 728 729 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) { 730 /* If mostly Fs, there is no device there, then let's probe 731 * MMD 0, as some 10G PHYs have zero Devices In package, 732 * e.g. Cortina CS4315/CS4340 PHY. 733 */ 734 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, &devs_in_pkg); 735 if (phy_reg < 0) 736 return -EIO; 737 738 /* no device there, let's get out of here */ 739 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) 740 return -ENODEV; 741 } 742 743 /* Now probe Device Identifiers for each device present. */ 744 for (i = 1; i < num_ids; i++) { 745 if (!(devs_in_pkg & (1 << i))) 746 continue; 747 748 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) { 749 /* Probe the "Device Present" bits for the vendor MMDs 750 * to ignore these if they do not contain IEEE 802.3 751 * registers. 752 */ 753 ret = phy_c45_probe_present(bus, addr, i); 754 if (ret < 0) 755 return ret; 756 757 if (!ret) 758 continue; 759 } 760 761 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID1); 762 if (phy_reg < 0) 763 return -EIO; 764 c45_ids->device_ids[i] = phy_reg << 16; 765 766 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID2); 767 if (phy_reg < 0) 768 return -EIO; 769 c45_ids->device_ids[i] |= phy_reg; 770 } 771 772 c45_ids->devices_in_package = devs_in_pkg; 773 /* Bit 0 doesn't represent a device, it indicates c22 regs presence */ 774 c45_ids->mmds_present = devs_in_pkg & ~BIT(0); 775 776 return 0; 777} 778 779/** 780 * get_phy_c22_id - reads the specified addr for its clause 22 ID. 781 * @bus: the target MII bus 782 * @addr: PHY address on the MII bus 783 * @phy_id: where to store the ID retrieved. 784 * 785 * Read the 802.3 clause 22 PHY ID from the PHY at @addr on the @bus, 786 * placing it in @phy_id. Return zero on successful read and the ID is 787 * valid, %-EIO on bus access error, or %-ENODEV if no device responds 788 * or invalid ID. 789 */ 790static int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id) 791{ 792 int phy_reg; 793 794 /* Grab the bits from PHYIR1, and put them in the upper half */ 795 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); 796 if (phy_reg < 0) { 797 /* returning -ENODEV doesn't stop bus scanning */ 798 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO; 799 } 800 801 *phy_id = phy_reg << 16; 802 803 /* Grab the bits from PHYIR2, and put them in the lower half */ 804 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); 805 if (phy_reg < 0) { 806 /* returning -ENODEV doesn't stop bus scanning */ 807 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO; 808 } 809 810 *phy_id |= phy_reg; 811 812 /* If the phy_id is mostly Fs, there is no device there */ 813 if ((*phy_id & 0x1fffffff) == 0x1fffffff) 814 return -ENODEV; 815 816 return 0; 817} 818 819/** 820 * get_phy_device - reads the specified PHY device and returns its @phy_device 821 * struct 822 * @bus: the target MII bus 823 * @addr: PHY address on the MII bus 824 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol 825 * 826 * Probe for a PHY at @addr on @bus. 827 * 828 * When probing for a clause 22 PHY, then read the ID registers. If we find 829 * a valid ID, allocate and return a &struct phy_device. 830 * 831 * When probing for a clause 45 PHY, read the "devices in package" registers. 832 * If the "devices in package" appears valid, read the ID registers for each 833 * MMD, allocate and return a &struct phy_device. 834 * 835 * Returns an allocated &struct phy_device on success, %-ENODEV if there is 836 * no PHY present, or %-EIO on bus access error. 837 */ 838struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) 839{ 840 struct phy_c45_device_ids c45_ids; 841 u32 phy_id = 0; 842 int r; 843 844 c45_ids.devices_in_package = 0; 845 c45_ids.mmds_present = 0; 846 memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids)); 847 848 if (is_c45) 849 r = get_phy_c45_ids(bus, addr, &c45_ids); 850 else 851 r = get_phy_c22_id(bus, addr, &phy_id); 852 853 if (r) 854 return ERR_PTR(r); 855 856 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); 857} 858EXPORT_SYMBOL(get_phy_device); 859 860/** 861 * phy_device_register - Register the phy device on the MDIO bus 862 * @phydev: phy_device structure to be added to the MDIO bus 863 */ 864int phy_device_register(struct phy_device *phydev) 865{ 866 int err; 867 868 err = mdiobus_register_device(&phydev->mdio); 869 if (err) 870 return err; 871 872 /* Deassert the reset signal */ 873 phy_device_reset(phydev, 0); 874 875 /* Run all of the fixups for this PHY */ 876 err = phy_scan_fixups(phydev); 877 if (err) { 878 phydev_err(phydev, "failed to initialize\n"); 879 goto out; 880 } 881 882 err = device_add(&phydev->mdio.dev); 883 if (err) { 884 phydev_err(phydev, "failed to add\n"); 885 goto out; 886 } 887 888 return 0; 889 890 out: 891 /* Assert the reset signal */ 892 phy_device_reset(phydev, 1); 893 894 mdiobus_unregister_device(&phydev->mdio); 895 return err; 896} 897EXPORT_SYMBOL(phy_device_register); 898 899/** 900 * phy_device_remove - Remove a previously registered phy device from the MDIO bus 901 * @phydev: phy_device structure to remove 902 * 903 * This doesn't free the phy_device itself, it merely reverses the effects 904 * of phy_device_register(). Use phy_device_free() to free the device 905 * after calling this function. 906 */ 907void phy_device_remove(struct phy_device *phydev) 908{ 909 if (phydev->mii_ts) 910 unregister_mii_timestamper(phydev->mii_ts); 911 912 device_del(&phydev->mdio.dev); 913 914 /* Assert the reset signal */ 915 phy_device_reset(phydev, 1); 916 917 mdiobus_unregister_device(&phydev->mdio); 918} 919EXPORT_SYMBOL(phy_device_remove); 920 921/** 922 * phy_find_first - finds the first PHY device on the bus 923 * @bus: the target MII bus 924 */ 925struct phy_device *phy_find_first(struct mii_bus *bus) 926{ 927 struct phy_device *phydev; 928 int addr; 929 930 for (addr = 0; addr < PHY_MAX_ADDR; addr++) { 931 phydev = mdiobus_get_phy(bus, addr); 932 if (phydev) 933 return phydev; 934 } 935 return NULL; 936} 937EXPORT_SYMBOL(phy_find_first); 938 939static void phy_link_change(struct phy_device *phydev, bool up) 940{ 941 struct net_device *netdev = phydev->attached_dev; 942 943 if (up) 944 netif_carrier_on(netdev); 945 else 946 netif_carrier_off(netdev); 947 phydev->adjust_link(netdev); 948 if (phydev->mii_ts && phydev->mii_ts->link_state) 949 phydev->mii_ts->link_state(phydev->mii_ts, phydev); 950} 951 952/** 953 * phy_prepare_link - prepares the PHY layer to monitor link status 954 * @phydev: target phy_device struct 955 * @handler: callback function for link status change notifications 956 * 957 * Description: Tells the PHY infrastructure to handle the 958 * gory details on monitoring link status (whether through 959 * polling or an interrupt), and to call back to the 960 * connected device driver when the link status changes. 961 * If you want to monitor your own link state, don't call 962 * this function. 963 */ 964static void phy_prepare_link(struct phy_device *phydev, 965 void (*handler)(struct net_device *)) 966{ 967 phydev->adjust_link = handler; 968} 969 970/** 971 * phy_connect_direct - connect an ethernet device to a specific phy_device 972 * @dev: the network device to connect 973 * @phydev: the pointer to the phy device 974 * @handler: callback function for state change notifications 975 * @interface: PHY device's interface 976 */ 977int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, 978 void (*handler)(struct net_device *), 979 phy_interface_t interface) 980{ 981 int rc; 982 983 if (!dev) 984 return -EINVAL; 985 986 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); 987 if (rc) 988 return rc; 989 990 phy_prepare_link(phydev, handler); 991 if (phy_interrupt_is_valid(phydev)) 992 phy_request_interrupt(phydev); 993 994 return 0; 995} 996EXPORT_SYMBOL(phy_connect_direct); 997 998/** 999 * phy_connect - connect an ethernet device to a PHY device 1000 * @dev: the network device to connect 1001 * @bus_id: the id string of the PHY device to connect 1002 * @handler: callback function for state change notifications 1003 * @interface: PHY device's interface 1004 * 1005 * Description: Convenience function for connecting ethernet 1006 * devices to PHY devices. The default behavior is for 1007 * the PHY infrastructure to handle everything, and only notify 1008 * the connected driver when the link status changes. If you 1009 * don't want, or can't use the provided functionality, you may 1010 * choose to call only the subset of functions which provide 1011 * the desired functionality. 1012 */ 1013struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, 1014 void (*handler)(struct net_device *), 1015 phy_interface_t interface) 1016{ 1017 struct phy_device *phydev; 1018 struct device *d; 1019 int rc; 1020 1021 /* Search the list of PHY devices on the mdio bus for the 1022 * PHY with the requested name 1023 */ 1024 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); 1025 if (!d) { 1026 pr_err("PHY %s not found\n", bus_id); 1027 return ERR_PTR(-ENODEV); 1028 } 1029 phydev = to_phy_device(d); 1030 1031 rc = phy_connect_direct(dev, phydev, handler, interface); 1032 put_device(d); 1033 if (rc) 1034 return ERR_PTR(rc); 1035 1036 return phydev; 1037} 1038EXPORT_SYMBOL(phy_connect); 1039 1040/** 1041 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY 1042 * device 1043 * @phydev: target phy_device struct 1044 */ 1045void phy_disconnect(struct phy_device *phydev) 1046{ 1047 if (phy_is_started(phydev)) 1048 phy_stop(phydev); 1049 1050 if (phy_interrupt_is_valid(phydev)) 1051 phy_free_interrupt(phydev); 1052 1053 phydev->adjust_link = NULL; 1054 1055 phy_detach(phydev); 1056} 1057EXPORT_SYMBOL(phy_disconnect); 1058 1059/** 1060 * phy_poll_reset - Safely wait until a PHY reset has properly completed 1061 * @phydev: The PHY device to poll 1062 * 1063 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as 1064 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR 1065 * register must be polled until the BMCR_RESET bit clears. 1066 * 1067 * Furthermore, any attempts to write to PHY registers may have no effect 1068 * or even generate MDIO bus errors until this is complete. 1069 * 1070 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the 1071 * standard and do not fully reset after the BMCR_RESET bit is set, and may 1072 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an 1073 * effort to support such broken PHYs, this function is separate from the 1074 * standard phy_init_hw() which will zero all the other bits in the BMCR 1075 * and reapply all driver-specific and board-specific fixups. 1076 */ 1077static int phy_poll_reset(struct phy_device *phydev) 1078{ 1079 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ 1080 int ret, val; 1081 1082 ret = phy_read_poll_timeout(phydev, MII_BMCR, val, !(val & BMCR_RESET), 1083 50000, 600000, true); 1084 if (ret) 1085 return ret; 1086 /* Some chips (smsc911x) may still need up to another 1ms after the 1087 * BMCR_RESET bit is cleared before they are usable. 1088 */ 1089 msleep(1); 1090 return 0; 1091} 1092 1093int phy_init_hw(struct phy_device *phydev) 1094{ 1095 int ret = 0; 1096 1097 /* Deassert the reset signal */ 1098 phy_device_reset(phydev, 0); 1099 1100 if (!phydev->drv) 1101 return 0; 1102 1103 if (phydev->drv->soft_reset) { 1104 ret = phydev->drv->soft_reset(phydev); 1105 /* see comment in genphy_soft_reset for an explanation */ 1106 if (!ret) 1107 phydev->suspended = 0; 1108 } 1109 1110 if (ret < 0) 1111 return ret; 1112 1113 ret = phy_scan_fixups(phydev); 1114 if (ret < 0) 1115 return ret; 1116 1117 if (phydev->drv->config_init) { 1118 ret = phydev->drv->config_init(phydev); 1119 if (ret < 0) 1120 return ret; 1121 } 1122 1123 if (phydev->drv->config_intr) { 1124 ret = phydev->drv->config_intr(phydev); 1125 if (ret < 0) 1126 return ret; 1127 } 1128 1129 return 0; 1130} 1131EXPORT_SYMBOL(phy_init_hw); 1132 1133void phy_attached_info(struct phy_device *phydev) 1134{ 1135 phy_attached_print(phydev, NULL); 1136} 1137EXPORT_SYMBOL(phy_attached_info); 1138 1139#define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%s)" 1140char *phy_attached_info_irq(struct phy_device *phydev) 1141{ 1142 char *irq_str; 1143 char irq_num[8]; 1144 1145 switch(phydev->irq) { 1146 case PHY_POLL: 1147 irq_str = "POLL"; 1148 break; 1149 case PHY_IGNORE_INTERRUPT: 1150 irq_str = "IGNORE"; 1151 break; 1152 default: 1153 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq); 1154 irq_str = irq_num; 1155 break; 1156 } 1157 1158 return kasprintf(GFP_KERNEL, "%s", irq_str); 1159} 1160EXPORT_SYMBOL(phy_attached_info_irq); 1161 1162void phy_attached_print(struct phy_device *phydev, const char *fmt, ...) 1163{ 1164 const char *drv_name = phydev->drv ? phydev->drv->name : "unbound"; 1165 char *irq_str = phy_attached_info_irq(phydev); 1166 1167 if (!fmt) { 1168 phydev_info(phydev, ATTACHED_FMT "\n", 1169 drv_name, phydev_name(phydev), 1170 irq_str); 1171 } else { 1172 va_list ap; 1173 1174 phydev_info(phydev, ATTACHED_FMT, 1175 drv_name, phydev_name(phydev), 1176 irq_str); 1177 1178 va_start(ap, fmt); 1179 vprintk(fmt, ap); 1180 va_end(ap); 1181 } 1182 kfree(irq_str); 1183} 1184EXPORT_SYMBOL(phy_attached_print); 1185 1186static void phy_sysfs_create_links(struct phy_device *phydev) 1187{ 1188 struct net_device *dev = phydev->attached_dev; 1189 int err; 1190 1191 if (!dev) 1192 return; 1193 1194 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj, 1195 "attached_dev"); 1196 if (err) 1197 return; 1198 1199 err = sysfs_create_link_nowarn(&dev->dev.kobj, 1200 &phydev->mdio.dev.kobj, 1201 "phydev"); 1202 if (err) { 1203 dev_err(&dev->dev, "could not add device link to %s err %d\n", 1204 kobject_name(&phydev->mdio.dev.kobj), 1205 err); 1206 /* non-fatal - some net drivers can use one netdevice 1207 * with more then one phy 1208 */ 1209 } 1210 1211 phydev->sysfs_links = true; 1212} 1213 1214static ssize_t 1215phy_standalone_show(struct device *dev, struct device_attribute *attr, 1216 char *buf) 1217{ 1218 struct phy_device *phydev = to_phy_device(dev); 1219 1220 return sprintf(buf, "%d\n", !phydev->attached_dev); 1221} 1222static DEVICE_ATTR_RO(phy_standalone); 1223 1224/** 1225 * phy_sfp_attach - attach the SFP bus to the PHY upstream network device 1226 * @upstream: pointer to the phy device 1227 * @bus: sfp bus representing cage being attached 1228 * 1229 * This is used to fill in the sfp_upstream_ops .attach member. 1230 */ 1231void phy_sfp_attach(void *upstream, struct sfp_bus *bus) 1232{ 1233 struct phy_device *phydev = upstream; 1234 1235 if (phydev->attached_dev) 1236 phydev->attached_dev->sfp_bus = bus; 1237 phydev->sfp_bus_attached = true; 1238} 1239EXPORT_SYMBOL(phy_sfp_attach); 1240 1241/** 1242 * phy_sfp_detach - detach the SFP bus from the PHY upstream network device 1243 * @upstream: pointer to the phy device 1244 * @bus: sfp bus representing cage being attached 1245 * 1246 * This is used to fill in the sfp_upstream_ops .detach member. 1247 */ 1248void phy_sfp_detach(void *upstream, struct sfp_bus *bus) 1249{ 1250 struct phy_device *phydev = upstream; 1251 1252 if (phydev->attached_dev) 1253 phydev->attached_dev->sfp_bus = NULL; 1254 phydev->sfp_bus_attached = false; 1255} 1256EXPORT_SYMBOL(phy_sfp_detach); 1257 1258/** 1259 * phy_sfp_probe - probe for a SFP cage attached to this PHY device 1260 * @phydev: Pointer to phy_device 1261 * @ops: SFP's upstream operations 1262 */ 1263int phy_sfp_probe(struct phy_device *phydev, 1264 const struct sfp_upstream_ops *ops) 1265{ 1266 struct sfp_bus *bus; 1267 int ret = 0; 1268 1269 if (phydev->mdio.dev.fwnode) { 1270 bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode); 1271 if (IS_ERR(bus)) 1272 return PTR_ERR(bus); 1273 1274 phydev->sfp_bus = bus; 1275 1276 ret = sfp_bus_add_upstream(bus, phydev, ops); 1277 sfp_bus_put(bus); 1278 } 1279 return ret; 1280} 1281EXPORT_SYMBOL(phy_sfp_probe); 1282 1283/** 1284 * phy_attach_direct - attach a network device to a given PHY device pointer 1285 * @dev: network device to attach 1286 * @phydev: Pointer to phy_device to attach 1287 * @flags: PHY device's dev_flags 1288 * @interface: PHY device's interface 1289 * 1290 * Description: Called by drivers to attach to a particular PHY 1291 * device. The phy_device is found, and properly hooked up 1292 * to the phy_driver. If no driver is attached, then a 1293 * generic driver is used. The phy_device is given a ptr to 1294 * the attaching device, and given a callback for link status 1295 * change. The phy_device is returned to the attaching driver. 1296 * This function takes a reference on the phy device. 1297 */ 1298int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, 1299 u32 flags, phy_interface_t interface) 1300{ 1301 struct mii_bus *bus = phydev->mdio.bus; 1302 struct device *d = &phydev->mdio.dev; 1303 struct module *ndev_owner = NULL; 1304 bool using_genphy = false; 1305 int err; 1306 1307 /* For Ethernet device drivers that register their own MDIO bus, we 1308 * will have bus->owner match ndev_mod, so we do not want to increment 1309 * our own module->refcnt here, otherwise we would not be able to 1310 * unload later on. 1311 */ 1312 if (dev) 1313 ndev_owner = dev->dev.parent->driver->owner; 1314 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) { 1315 phydev_err(phydev, "failed to get the bus module\n"); 1316 return -EIO; 1317 } 1318 1319 get_device(d); 1320 1321 /* Assume that if there is no driver, that it doesn't 1322 * exist, and we should use the genphy driver. 1323 */ 1324 if (!d->driver) { 1325 if (phydev->is_c45) 1326 d->driver = &genphy_c45_driver.mdiodrv.driver; 1327 else 1328 d->driver = &genphy_driver.mdiodrv.driver; 1329 1330 using_genphy = true; 1331 } 1332 1333 if (!try_module_get(d->driver->owner)) { 1334 phydev_err(phydev, "failed to get the device driver module\n"); 1335 err = -EIO; 1336 goto error_put_device; 1337 } 1338 1339 if (using_genphy) { 1340 err = d->driver->probe(d); 1341 if (err >= 0) 1342 err = device_bind_driver(d); 1343 1344 if (err) 1345 goto error_module_put; 1346 } 1347 1348 if (phydev->attached_dev) { 1349 dev_err(&dev->dev, "PHY already attached\n"); 1350 err = -EBUSY; 1351 goto error; 1352 } 1353 1354 phydev->phy_link_change = phy_link_change; 1355 if (dev) { 1356 phydev->attached_dev = dev; 1357 dev->phydev = phydev; 1358 1359 if (phydev->sfp_bus_attached) 1360 dev->sfp_bus = phydev->sfp_bus; 1361 } 1362 1363 /* Some Ethernet drivers try to connect to a PHY device before 1364 * calling register_netdevice() -> netdev_register_kobject() and 1365 * does the dev->dev.kobj initialization. Here we only check for 1366 * success which indicates that the network device kobject is 1367 * ready. Once we do that we still need to keep track of whether 1368 * links were successfully set up or not for phy_detach() to 1369 * remove them accordingly. 1370 */ 1371 phydev->sysfs_links = false; 1372 1373 phy_sysfs_create_links(phydev); 1374 1375 if (!phydev->attached_dev) { 1376 err = sysfs_create_file(&phydev->mdio.dev.kobj, 1377 &dev_attr_phy_standalone.attr); 1378 if (err) 1379 phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n"); 1380 } 1381 1382 phydev->dev_flags |= flags; 1383 1384 phydev->interface = interface; 1385 1386 phydev->state = PHY_READY; 1387 1388 /* Port is set to PORT_TP by default and the actual PHY driver will set 1389 * it to different value depending on the PHY configuration. If we have 1390 * the generic PHY driver we can't figure it out, thus set the old 1391 * legacy PORT_MII value. 1392 */ 1393 if (using_genphy) 1394 phydev->port = PORT_MII; 1395 1396 /* Initial carrier state is off as the phy is about to be 1397 * (re)initialized. 1398 */ 1399 if (dev) 1400 netif_carrier_off(phydev->attached_dev); 1401 1402 /* Do initial configuration here, now that 1403 * we have certain key parameters 1404 * (dev_flags and interface) 1405 */ 1406 err = phy_init_hw(phydev); 1407 if (err) 1408 goto error; 1409 1410 err = phy_disable_interrupts(phydev); 1411 if (err) 1412 return err; 1413 1414 phy_resume(phydev); 1415 phy_led_triggers_register(phydev); 1416 1417 return err; 1418 1419error: 1420 /* phy_detach() does all of the cleanup below */ 1421 phy_detach(phydev); 1422 return err; 1423 1424error_module_put: 1425 module_put(d->driver->owner); 1426 d->driver = NULL; 1427error_put_device: 1428 put_device(d); 1429 if (ndev_owner != bus->owner) 1430 module_put(bus->owner); 1431 return err; 1432} 1433EXPORT_SYMBOL(phy_attach_direct); 1434 1435/** 1436 * phy_attach - attach a network device to a particular PHY device 1437 * @dev: network device to attach 1438 * @bus_id: Bus ID of PHY device to attach 1439 * @interface: PHY device's interface 1440 * 1441 * Description: Same as phy_attach_direct() except that a PHY bus_id 1442 * string is passed instead of a pointer to a struct phy_device. 1443 */ 1444struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, 1445 phy_interface_t interface) 1446{ 1447 struct bus_type *bus = &mdio_bus_type; 1448 struct phy_device *phydev; 1449 struct device *d; 1450 int rc; 1451 1452 if (!dev) 1453 return ERR_PTR(-EINVAL); 1454 1455 /* Search the list of PHY devices on the mdio bus for the 1456 * PHY with the requested name 1457 */ 1458 d = bus_find_device_by_name(bus, NULL, bus_id); 1459 if (!d) { 1460 pr_err("PHY %s not found\n", bus_id); 1461 return ERR_PTR(-ENODEV); 1462 } 1463 phydev = to_phy_device(d); 1464 1465 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); 1466 put_device(d); 1467 if (rc) 1468 return ERR_PTR(rc); 1469 1470 return phydev; 1471} 1472EXPORT_SYMBOL(phy_attach); 1473 1474static bool phy_driver_is_genphy_kind(struct phy_device *phydev, 1475 struct device_driver *driver) 1476{ 1477 struct device *d = &phydev->mdio.dev; 1478 bool ret = false; 1479 1480 if (!phydev->drv) 1481 return ret; 1482 1483 get_device(d); 1484 ret = d->driver == driver; 1485 put_device(d); 1486 1487 return ret; 1488} 1489 1490bool phy_driver_is_genphy(struct phy_device *phydev) 1491{ 1492 return phy_driver_is_genphy_kind(phydev, 1493 &genphy_driver.mdiodrv.driver); 1494} 1495EXPORT_SYMBOL_GPL(phy_driver_is_genphy); 1496 1497bool phy_driver_is_genphy_10g(struct phy_device *phydev) 1498{ 1499 return phy_driver_is_genphy_kind(phydev, 1500 &genphy_c45_driver.mdiodrv.driver); 1501} 1502EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g); 1503 1504/** 1505 * phy_package_join - join a common PHY group 1506 * @phydev: target phy_device struct 1507 * @addr: cookie and PHY address for global register access 1508 * @priv_size: if non-zero allocate this amount of bytes for private data 1509 * 1510 * This joins a PHY group and provides a shared storage for all phydevs in 1511 * this group. This is intended to be used for packages which contain 1512 * more than one PHY, for example a quad PHY transceiver. 1513 * 1514 * The addr parameter serves as a cookie which has to have the same value 1515 * for all members of one group and as a PHY address to access generic 1516 * registers of a PHY package. Usually, one of the PHY addresses of the 1517 * different PHYs in the package provides access to these global registers. 1518 * The address which is given here, will be used in the phy_package_read() 1519 * and phy_package_write() convenience functions. If your PHY doesn't have 1520 * global registers you can just pick any of the PHY addresses. 1521 * 1522 * This will set the shared pointer of the phydev to the shared storage. 1523 * If this is the first call for a this cookie the shared storage will be 1524 * allocated. If priv_size is non-zero, the given amount of bytes are 1525 * allocated for the priv member. 1526 * 1527 * Returns < 1 on error, 0 on success. Esp. calling phy_package_join() 1528 * with the same cookie but a different priv_size is an error. 1529 */ 1530int phy_package_join(struct phy_device *phydev, int addr, size_t priv_size) 1531{ 1532 struct mii_bus *bus = phydev->mdio.bus; 1533 struct phy_package_shared *shared; 1534 int ret; 1535 1536 if (addr < 0 || addr >= PHY_MAX_ADDR) 1537 return -EINVAL; 1538 1539 mutex_lock(&bus->shared_lock); 1540 shared = bus->shared[addr]; 1541 if (!shared) { 1542 ret = -ENOMEM; 1543 shared = kzalloc(sizeof(*shared), GFP_KERNEL); 1544 if (!shared) 1545 goto err_unlock; 1546 if (priv_size) { 1547 shared->priv = kzalloc(priv_size, GFP_KERNEL); 1548 if (!shared->priv) 1549 goto err_free; 1550 shared->priv_size = priv_size; 1551 } 1552 shared->addr = addr; 1553 refcount_set(&shared->refcnt, 1); 1554 bus->shared[addr] = shared; 1555 } else { 1556 ret = -EINVAL; 1557 if (priv_size && priv_size != shared->priv_size) 1558 goto err_unlock; 1559 refcount_inc(&shared->refcnt); 1560 } 1561 mutex_unlock(&bus->shared_lock); 1562 1563 phydev->shared = shared; 1564 1565 return 0; 1566 1567err_free: 1568 kfree(shared); 1569err_unlock: 1570 mutex_unlock(&bus->shared_lock); 1571 return ret; 1572} 1573EXPORT_SYMBOL_GPL(phy_package_join); 1574 1575/** 1576 * phy_package_leave - leave a common PHY group 1577 * @phydev: target phy_device struct 1578 * 1579 * This leaves a PHY group created by phy_package_join(). If this phydev 1580 * was the last user of the shared data between the group, this data is 1581 * freed. Resets the phydev->shared pointer to NULL. 1582 */ 1583void phy_package_leave(struct phy_device *phydev) 1584{ 1585 struct phy_package_shared *shared = phydev->shared; 1586 struct mii_bus *bus = phydev->mdio.bus; 1587 1588 if (!shared) 1589 return; 1590 1591 if (refcount_dec_and_mutex_lock(&shared->refcnt, &bus->shared_lock)) { 1592 bus->shared[shared->addr] = NULL; 1593 mutex_unlock(&bus->shared_lock); 1594 kfree(shared->priv); 1595 kfree(shared); 1596 } 1597 1598 phydev->shared = NULL; 1599} 1600EXPORT_SYMBOL_GPL(phy_package_leave); 1601 1602static void devm_phy_package_leave(struct device *dev, void *res) 1603{ 1604 phy_package_leave(*(struct phy_device **)res); 1605} 1606 1607/** 1608 * devm_phy_package_join - resource managed phy_package_join() 1609 * @dev: device that is registering this PHY package 1610 * @phydev: target phy_device struct 1611 * @addr: cookie and PHY address for global register access 1612 * @priv_size: if non-zero allocate this amount of bytes for private data 1613 * 1614 * Managed phy_package_join(). Shared storage fetched by this function, 1615 * phy_package_leave() is automatically called on driver detach. See 1616 * phy_package_join() for more information. 1617 */ 1618int devm_phy_package_join(struct device *dev, struct phy_device *phydev, 1619 int addr, size_t priv_size) 1620{ 1621 struct phy_device **ptr; 1622 int ret; 1623 1624 ptr = devres_alloc(devm_phy_package_leave, sizeof(*ptr), 1625 GFP_KERNEL); 1626 if (!ptr) 1627 return -ENOMEM; 1628 1629 ret = phy_package_join(phydev, addr, priv_size); 1630 1631 if (!ret) { 1632 *ptr = phydev; 1633 devres_add(dev, ptr); 1634 } else { 1635 devres_free(ptr); 1636 } 1637 1638 return ret; 1639} 1640EXPORT_SYMBOL_GPL(devm_phy_package_join); 1641 1642/** 1643 * phy_detach - detach a PHY device from its network device 1644 * @phydev: target phy_device struct 1645 * 1646 * This detaches the phy device from its network device and the phy 1647 * driver, and drops the reference count taken in phy_attach_direct(). 1648 */ 1649void phy_detach(struct phy_device *phydev) 1650{ 1651 struct net_device *dev = phydev->attached_dev; 1652 struct module *ndev_owner = NULL; 1653 struct mii_bus *bus; 1654 1655 if (phydev->sysfs_links) { 1656 if (dev) 1657 sysfs_remove_link(&dev->dev.kobj, "phydev"); 1658 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev"); 1659 } 1660 1661 if (!phydev->attached_dev) 1662 sysfs_remove_file(&phydev->mdio.dev.kobj, 1663 &dev_attr_phy_standalone.attr); 1664 1665 phy_suspend(phydev); 1666 if (dev) { 1667 phydev->attached_dev->phydev = NULL; 1668 phydev->attached_dev = NULL; 1669 } 1670 phydev->phylink = NULL; 1671 1672 phy_led_triggers_unregister(phydev); 1673 1674 if (phydev->mdio.dev.driver) 1675 module_put(phydev->mdio.dev.driver->owner); 1676 1677 /* If the device had no specific driver before (i.e. - it 1678 * was using the generic driver), we unbind the device 1679 * from the generic driver so that there's a chance a 1680 * real driver could be loaded 1681 */ 1682 if (phy_driver_is_genphy(phydev) || 1683 phy_driver_is_genphy_10g(phydev)) 1684 device_release_driver(&phydev->mdio.dev); 1685 1686 /* Assert the reset signal */ 1687 phy_device_reset(phydev, 1); 1688 1689 /* 1690 * The phydev might go away on the put_device() below, so avoid 1691 * a use-after-free bug by reading the underlying bus first. 1692 */ 1693 bus = phydev->mdio.bus; 1694 1695 put_device(&phydev->mdio.dev); 1696 if (dev) 1697 ndev_owner = dev->dev.parent->driver->owner; 1698 if (ndev_owner != bus->owner) 1699 module_put(bus->owner); 1700} 1701EXPORT_SYMBOL(phy_detach); 1702 1703int phy_suspend(struct phy_device *phydev) 1704{ 1705 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; 1706 struct net_device *netdev = phydev->attached_dev; 1707 struct phy_driver *phydrv = phydev->drv; 1708 int ret; 1709 1710 if (phydev->suspended) 1711 return 0; 1712 1713 /* If the device has WOL enabled, we cannot suspend the PHY */ 1714 phy_ethtool_get_wol(phydev, &wol); 1715 if (wol.wolopts || (netdev && netdev->wol_enabled)) 1716 return -EBUSY; 1717 1718 if (!phydrv || !phydrv->suspend) 1719 return 0; 1720 1721 ret = phydrv->suspend(phydev); 1722 if (!ret) 1723 phydev->suspended = true; 1724 1725 return ret; 1726} 1727EXPORT_SYMBOL(phy_suspend); 1728 1729int __phy_resume(struct phy_device *phydev) 1730{ 1731 struct phy_driver *phydrv = phydev->drv; 1732 int ret; 1733 1734 WARN_ON(!mutex_is_locked(&phydev->lock)); 1735 1736 if (!phydrv || !phydrv->resume) 1737 return 0; 1738 1739 ret = phydrv->resume(phydev); 1740 if (!ret) 1741 phydev->suspended = false; 1742 1743 return ret; 1744} 1745EXPORT_SYMBOL(__phy_resume); 1746 1747int phy_resume(struct phy_device *phydev) 1748{ 1749 int ret; 1750 1751 mutex_lock(&phydev->lock); 1752 ret = __phy_resume(phydev); 1753 mutex_unlock(&phydev->lock); 1754 1755 return ret; 1756} 1757EXPORT_SYMBOL(phy_resume); 1758 1759int phy_loopback(struct phy_device *phydev, bool enable) 1760{ 1761 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); 1762 int ret = 0; 1763 1764 mutex_lock(&phydev->lock); 1765 1766 if (enable && phydev->loopback_enabled) { 1767 ret = -EBUSY; 1768 goto out; 1769 } 1770 1771 if (!enable && !phydev->loopback_enabled) { 1772 ret = -EINVAL; 1773 goto out; 1774 } 1775 1776 if (phydev->drv && phydrv->set_loopback) 1777 ret = phydrv->set_loopback(phydev, enable); 1778 else 1779 ret = -EOPNOTSUPP; 1780 1781 if (ret) 1782 goto out; 1783 1784 phydev->loopback_enabled = enable; 1785 1786out: 1787 mutex_unlock(&phydev->lock); 1788 return ret; 1789} 1790EXPORT_SYMBOL(phy_loopback); 1791 1792/** 1793 * phy_reset_after_clk_enable - perform a PHY reset if needed 1794 * @phydev: target phy_device struct 1795 * 1796 * Description: Some PHYs are known to need a reset after their refclk was 1797 * enabled. This function evaluates the flags and perform the reset if it's 1798 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy 1799 * was reset. 1800 */ 1801int phy_reset_after_clk_enable(struct phy_device *phydev) 1802{ 1803 if (!phydev || !phydev->drv) 1804 return -ENODEV; 1805 1806 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) { 1807 phy_device_reset(phydev, 1); 1808 phy_device_reset(phydev, 0); 1809 return 1; 1810 } 1811 1812 return 0; 1813} 1814EXPORT_SYMBOL(phy_reset_after_clk_enable); 1815 1816/* Generic PHY support and helper functions */ 1817 1818/** 1819 * genphy_config_advert - sanitize and advertise auto-negotiation parameters 1820 * @phydev: target phy_device struct 1821 * 1822 * Description: Writes MII_ADVERTISE with the appropriate values, 1823 * after sanitizing the values to make sure we only advertise 1824 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement 1825 * hasn't changed, and > 0 if it has changed. 1826 */ 1827static int genphy_config_advert(struct phy_device *phydev) 1828{ 1829 int err, bmsr, changed = 0; 1830 u32 adv; 1831 1832 /* Only allow advertising what this PHY supports */ 1833 linkmode_and(phydev->advertising, phydev->advertising, 1834 phydev->supported); 1835 1836 adv = linkmode_adv_to_mii_adv_t(phydev->advertising); 1837 1838 /* Setup standard advertisement */ 1839 err = phy_modify_changed(phydev, MII_ADVERTISE, 1840 ADVERTISE_ALL | ADVERTISE_100BASE4 | 1841 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM, 1842 adv); 1843 if (err < 0) 1844 return err; 1845 if (err > 0) 1846 changed = 1; 1847 1848 bmsr = phy_read(phydev, MII_BMSR); 1849 if (bmsr < 0) 1850 return bmsr; 1851 1852 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all 1853 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a 1854 * logical 1. 1855 */ 1856 if (!(bmsr & BMSR_ESTATEN)) 1857 return changed; 1858 1859 adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising); 1860 1861 err = phy_modify_changed(phydev, MII_CTRL1000, 1862 ADVERTISE_1000FULL | ADVERTISE_1000HALF, 1863 adv); 1864 if (err < 0) 1865 return err; 1866 if (err > 0) 1867 changed = 1; 1868 1869 return changed; 1870} 1871 1872/** 1873 * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters 1874 * @phydev: target phy_device struct 1875 * 1876 * Description: Writes MII_ADVERTISE with the appropriate values, 1877 * after sanitizing the values to make sure we only advertise 1878 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement 1879 * hasn't changed, and > 0 if it has changed. This function is intended 1880 * for Clause 37 1000Base-X mode. 1881 */ 1882static int genphy_c37_config_advert(struct phy_device *phydev) 1883{ 1884 u16 adv = 0; 1885 1886 /* Only allow advertising what this PHY supports */ 1887 linkmode_and(phydev->advertising, phydev->advertising, 1888 phydev->supported); 1889 1890 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 1891 phydev->advertising)) 1892 adv |= ADVERTISE_1000XFULL; 1893 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 1894 phydev->advertising)) 1895 adv |= ADVERTISE_1000XPAUSE; 1896 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 1897 phydev->advertising)) 1898 adv |= ADVERTISE_1000XPSE_ASYM; 1899 1900 return phy_modify_changed(phydev, MII_ADVERTISE, 1901 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE | 1902 ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM, 1903 adv); 1904} 1905 1906/** 1907 * genphy_config_eee_advert - disable unwanted eee mode advertisement 1908 * @phydev: target phy_device struct 1909 * 1910 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy 1911 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't 1912 * changed, and 1 if it has changed. 1913 */ 1914int genphy_config_eee_advert(struct phy_device *phydev) 1915{ 1916 int err; 1917 1918 /* Nothing to disable */ 1919 if (!phydev->eee_broken_modes) 1920 return 0; 1921 1922 err = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, 1923 phydev->eee_broken_modes, 0); 1924 /* If the call failed, we assume that EEE is not supported */ 1925 return err < 0 ? 0 : err; 1926} 1927EXPORT_SYMBOL(genphy_config_eee_advert); 1928 1929/** 1930 * genphy_setup_forced - configures/forces speed/duplex from @phydev 1931 * @phydev: target phy_device struct 1932 * 1933 * Description: Configures MII_BMCR to force speed/duplex 1934 * to the values in phydev. Assumes that the values are valid. 1935 * Please see phy_sanitize_settings(). 1936 */ 1937int genphy_setup_forced(struct phy_device *phydev) 1938{ 1939 u16 ctl = 0; 1940 1941 phydev->pause = 0; 1942 phydev->asym_pause = 0; 1943 1944 if (SPEED_1000 == phydev->speed) 1945 ctl |= BMCR_SPEED1000; 1946 else if (SPEED_100 == phydev->speed) 1947 ctl |= BMCR_SPEED100; 1948 1949 if (DUPLEX_FULL == phydev->duplex) 1950 ctl |= BMCR_FULLDPLX; 1951 1952 return phy_modify(phydev, MII_BMCR, 1953 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl); 1954} 1955EXPORT_SYMBOL(genphy_setup_forced); 1956 1957static int genphy_setup_master_slave(struct phy_device *phydev) 1958{ 1959 u16 ctl = 0; 1960 1961 if (!phydev->is_gigabit_capable) 1962 return 0; 1963 1964 switch (phydev->master_slave_set) { 1965 case MASTER_SLAVE_CFG_MASTER_PREFERRED: 1966 ctl |= CTL1000_PREFER_MASTER; 1967 break; 1968 case MASTER_SLAVE_CFG_SLAVE_PREFERRED: 1969 break; 1970 case MASTER_SLAVE_CFG_MASTER_FORCE: 1971 ctl |= CTL1000_AS_MASTER; 1972 fallthrough; 1973 case MASTER_SLAVE_CFG_SLAVE_FORCE: 1974 ctl |= CTL1000_ENABLE_MASTER; 1975 break; 1976 case MASTER_SLAVE_CFG_UNKNOWN: 1977 case MASTER_SLAVE_CFG_UNSUPPORTED: 1978 return 0; 1979 default: 1980 phydev_warn(phydev, "Unsupported Master/Slave mode\n"); 1981 return -EOPNOTSUPP; 1982 } 1983 1984 return phy_modify_changed(phydev, MII_CTRL1000, 1985 (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER | 1986 CTL1000_PREFER_MASTER), ctl); 1987} 1988 1989static int genphy_read_master_slave(struct phy_device *phydev) 1990{ 1991 int cfg, state; 1992 int val; 1993 1994 if (!phydev->is_gigabit_capable) { 1995 phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED; 1996 phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED; 1997 return 0; 1998 } 1999 2000 phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN; 2001 phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN; 2002 2003 val = phy_read(phydev, MII_CTRL1000); 2004 if (val < 0) 2005 return val; 2006 2007 if (val & CTL1000_ENABLE_MASTER) { 2008 if (val & CTL1000_AS_MASTER) 2009 cfg = MASTER_SLAVE_CFG_MASTER_FORCE; 2010 else 2011 cfg = MASTER_SLAVE_CFG_SLAVE_FORCE; 2012 } else { 2013 if (val & CTL1000_PREFER_MASTER) 2014 cfg = MASTER_SLAVE_CFG_MASTER_PREFERRED; 2015 else 2016 cfg = MASTER_SLAVE_CFG_SLAVE_PREFERRED; 2017 } 2018 2019 val = phy_read(phydev, MII_STAT1000); 2020 if (val < 0) 2021 return val; 2022 2023 if (val & LPA_1000MSFAIL) { 2024 state = MASTER_SLAVE_STATE_ERR; 2025 } else if (phydev->link) { 2026 /* this bits are valid only for active link */ 2027 if (val & LPA_1000MSRES) 2028 state = MASTER_SLAVE_STATE_MASTER; 2029 else 2030 state = MASTER_SLAVE_STATE_SLAVE; 2031 } else { 2032 state = MASTER_SLAVE_STATE_UNKNOWN; 2033 } 2034 2035 phydev->master_slave_get = cfg; 2036 phydev->master_slave_state = state; 2037 2038 return 0; 2039} 2040 2041/** 2042 * genphy_restart_aneg - Enable and Restart Autonegotiation 2043 * @phydev: target phy_device struct 2044 */ 2045int genphy_restart_aneg(struct phy_device *phydev) 2046{ 2047 /* Don't isolate the PHY if we're negotiating */ 2048 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, 2049 BMCR_ANENABLE | BMCR_ANRESTART); 2050} 2051EXPORT_SYMBOL(genphy_restart_aneg); 2052 2053/** 2054 * genphy_check_and_restart_aneg - Enable and restart auto-negotiation 2055 * @phydev: target phy_device struct 2056 * @restart: whether aneg restart is requested 2057 * 2058 * Check, and restart auto-negotiation if needed. 2059 */ 2060int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart) 2061{ 2062 int ret; 2063 2064 if (!restart) { 2065 /* Advertisement hasn't changed, but maybe aneg was never on to 2066 * begin with? Or maybe phy was isolated? 2067 */ 2068 ret = phy_read(phydev, MII_BMCR); 2069 if (ret < 0) 2070 return ret; 2071 2072 if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE)) 2073 restart = true; 2074 } 2075 2076 if (restart) 2077 return genphy_restart_aneg(phydev); 2078 2079 return 0; 2080} 2081EXPORT_SYMBOL(genphy_check_and_restart_aneg); 2082 2083/** 2084 * __genphy_config_aneg - restart auto-negotiation or write BMCR 2085 * @phydev: target phy_device struct 2086 * @changed: whether autoneg is requested 2087 * 2088 * Description: If auto-negotiation is enabled, we configure the 2089 * advertising, and then restart auto-negotiation. If it is not 2090 * enabled, then we write the BMCR. 2091 */ 2092int __genphy_config_aneg(struct phy_device *phydev, bool changed) 2093{ 2094 int err; 2095 2096 if (genphy_config_eee_advert(phydev)) 2097 changed = true; 2098 2099 err = genphy_setup_master_slave(phydev); 2100 if (err < 0) 2101 return err; 2102 else if (err) 2103 changed = true; 2104 2105 if (AUTONEG_ENABLE != phydev->autoneg) 2106 return genphy_setup_forced(phydev); 2107 2108 err = genphy_config_advert(phydev); 2109 if (err < 0) /* error */ 2110 return err; 2111 else if (err) 2112 changed = true; 2113 2114 return genphy_check_and_restart_aneg(phydev, changed); 2115} 2116EXPORT_SYMBOL(__genphy_config_aneg); 2117 2118/** 2119 * genphy_c37_config_aneg - restart auto-negotiation or write BMCR 2120 * @phydev: target phy_device struct 2121 * 2122 * Description: If auto-negotiation is enabled, we configure the 2123 * advertising, and then restart auto-negotiation. If it is not 2124 * enabled, then we write the BMCR. This function is intended 2125 * for use with Clause 37 1000Base-X mode. 2126 */ 2127int genphy_c37_config_aneg(struct phy_device *phydev) 2128{ 2129 int err, changed; 2130 2131 if (phydev->autoneg != AUTONEG_ENABLE) 2132 return genphy_setup_forced(phydev); 2133 2134 err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100, 2135 BMCR_SPEED1000); 2136 if (err) 2137 return err; 2138 2139 changed = genphy_c37_config_advert(phydev); 2140 if (changed < 0) /* error */ 2141 return changed; 2142 2143 if (!changed) { 2144 /* Advertisement hasn't changed, but maybe aneg was never on to 2145 * begin with? Or maybe phy was isolated? 2146 */ 2147 int ctl = phy_read(phydev, MII_BMCR); 2148 2149 if (ctl < 0) 2150 return ctl; 2151 2152 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) 2153 changed = 1; /* do restart aneg */ 2154 } 2155 2156 /* Only restart aneg if we are advertising something different 2157 * than we were before. 2158 */ 2159 if (changed > 0) 2160 return genphy_restart_aneg(phydev); 2161 2162 return 0; 2163} 2164EXPORT_SYMBOL(genphy_c37_config_aneg); 2165 2166/** 2167 * genphy_aneg_done - return auto-negotiation status 2168 * @phydev: target phy_device struct 2169 * 2170 * Description: Reads the status register and returns 0 either if 2171 * auto-negotiation is incomplete, or if there was an error. 2172 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. 2173 */ 2174int genphy_aneg_done(struct phy_device *phydev) 2175{ 2176 int retval = phy_read(phydev, MII_BMSR); 2177 2178 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); 2179} 2180EXPORT_SYMBOL(genphy_aneg_done); 2181 2182/** 2183 * genphy_update_link - update link status in @phydev 2184 * @phydev: target phy_device struct 2185 * 2186 * Description: Update the value in phydev->link to reflect the 2187 * current link value. In order to do this, we need to read 2188 * the status register twice, keeping the second value. 2189 */ 2190int genphy_update_link(struct phy_device *phydev) 2191{ 2192 int status = 0, bmcr; 2193 2194 bmcr = phy_read(phydev, MII_BMCR); 2195 if (bmcr < 0) 2196 return bmcr; 2197 2198 /* Autoneg is being started, therefore disregard BMSR value and 2199 * report link as down. 2200 */ 2201 if (bmcr & BMCR_ANRESTART) 2202 goto done; 2203 2204 /* The link state is latched low so that momentary link 2205 * drops can be detected. Do not double-read the status 2206 * in polling mode to detect such short link drops except 2207 * the link was already down. 2208 */ 2209 if (!phy_polling_mode(phydev) || !phydev->link) { 2210 status = phy_read(phydev, MII_BMSR); 2211 if (status < 0) 2212 return status; 2213 else if (status & BMSR_LSTATUS) 2214 goto done; 2215 } 2216 2217 /* Read link and autonegotiation status */ 2218 status = phy_read(phydev, MII_BMSR); 2219 if (status < 0) 2220 return status; 2221done: 2222 phydev->link = status & BMSR_LSTATUS ? 1 : 0; 2223 phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0; 2224 2225 /* Consider the case that autoneg was started and "aneg complete" 2226 * bit has been reset, but "link up" bit not yet. 2227 */ 2228 if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete) 2229 phydev->link = 0; 2230 2231 return 0; 2232} 2233EXPORT_SYMBOL(genphy_update_link); 2234 2235int genphy_read_lpa(struct phy_device *phydev) 2236{ 2237 int lpa, lpagb; 2238 2239 if (phydev->autoneg == AUTONEG_ENABLE) { 2240 if (!phydev->autoneg_complete) { 2241 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, 2242 0); 2243 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0); 2244 return 0; 2245 } 2246 2247 if (phydev->is_gigabit_capable) { 2248 lpagb = phy_read(phydev, MII_STAT1000); 2249 if (lpagb < 0) 2250 return lpagb; 2251 2252 if (lpagb & LPA_1000MSFAIL) { 2253 int adv = phy_read(phydev, MII_CTRL1000); 2254 2255 if (adv < 0) 2256 return adv; 2257 2258 if (adv & CTL1000_ENABLE_MASTER) 2259 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n"); 2260 else 2261 phydev_err(phydev, "Master/Slave resolution failed\n"); 2262 return -ENOLINK; 2263 } 2264 2265 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, 2266 lpagb); 2267 } 2268 2269 lpa = phy_read(phydev, MII_LPA); 2270 if (lpa < 0) 2271 return lpa; 2272 2273 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa); 2274 } else { 2275 linkmode_zero(phydev->lp_advertising); 2276 } 2277 2278 return 0; 2279} 2280EXPORT_SYMBOL(genphy_read_lpa); 2281 2282/** 2283 * genphy_read_status_fixed - read the link parameters for !aneg mode 2284 * @phydev: target phy_device struct 2285 * 2286 * Read the current duplex and speed state for a PHY operating with 2287 * autonegotiation disabled. 2288 */ 2289int genphy_read_status_fixed(struct phy_device *phydev) 2290{ 2291 int bmcr = phy_read(phydev, MII_BMCR); 2292 2293 if (bmcr < 0) 2294 return bmcr; 2295 2296 if (bmcr & BMCR_FULLDPLX) 2297 phydev->duplex = DUPLEX_FULL; 2298 else 2299 phydev->duplex = DUPLEX_HALF; 2300 2301 if (bmcr & BMCR_SPEED1000) 2302 phydev->speed = SPEED_1000; 2303 else if (bmcr & BMCR_SPEED100) 2304 phydev->speed = SPEED_100; 2305 else 2306 phydev->speed = SPEED_10; 2307 2308 return 0; 2309} 2310EXPORT_SYMBOL(genphy_read_status_fixed); 2311 2312/** 2313 * genphy_read_status - check the link status and update current link state 2314 * @phydev: target phy_device struct 2315 * 2316 * Description: Check the link, then figure out the current state 2317 * by comparing what we advertise with what the link partner 2318 * advertises. Start by checking the gigabit possibilities, 2319 * then move on to 10/100. 2320 */ 2321int genphy_read_status(struct phy_device *phydev) 2322{ 2323 int err, old_link = phydev->link; 2324 2325 /* Update the link, but return if there was an error */ 2326 err = genphy_update_link(phydev); 2327 if (err) 2328 return err; 2329 2330 /* why bother the PHY if nothing can have changed */ 2331 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) 2332 return 0; 2333 2334 phydev->speed = SPEED_UNKNOWN; 2335 phydev->duplex = DUPLEX_UNKNOWN; 2336 phydev->pause = 0; 2337 phydev->asym_pause = 0; 2338 2339 err = genphy_read_master_slave(phydev); 2340 if (err < 0) 2341 return err; 2342 2343 err = genphy_read_lpa(phydev); 2344 if (err < 0) 2345 return err; 2346 2347 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { 2348 phy_resolve_aneg_linkmode(phydev); 2349 } else if (phydev->autoneg == AUTONEG_DISABLE) { 2350 err = genphy_read_status_fixed(phydev); 2351 if (err < 0) 2352 return err; 2353 } 2354 2355 return 0; 2356} 2357EXPORT_SYMBOL(genphy_read_status); 2358 2359/** 2360 * genphy_c37_read_status - check the link status and update current link state 2361 * @phydev: target phy_device struct 2362 * 2363 * Description: Check the link, then figure out the current state 2364 * by comparing what we advertise with what the link partner 2365 * advertises. This function is for Clause 37 1000Base-X mode. 2366 */ 2367int genphy_c37_read_status(struct phy_device *phydev) 2368{ 2369 int lpa, err, old_link = phydev->link; 2370 2371 /* Update the link, but return if there was an error */ 2372 err = genphy_update_link(phydev); 2373 if (err) 2374 return err; 2375 2376 /* why bother the PHY if nothing can have changed */ 2377 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) 2378 return 0; 2379 2380 phydev->duplex = DUPLEX_UNKNOWN; 2381 phydev->pause = 0; 2382 phydev->asym_pause = 0; 2383 2384 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { 2385 lpa = phy_read(phydev, MII_LPA); 2386 if (lpa < 0) 2387 return lpa; 2388 2389 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2390 phydev->lp_advertising, lpa & LPA_LPACK); 2391 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 2392 phydev->lp_advertising, lpa & LPA_1000XFULL); 2393 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2394 phydev->lp_advertising, lpa & LPA_1000XPAUSE); 2395 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2396 phydev->lp_advertising, 2397 lpa & LPA_1000XPAUSE_ASYM); 2398 2399 phy_resolve_aneg_linkmode(phydev); 2400 } else if (phydev->autoneg == AUTONEG_DISABLE) { 2401 int bmcr = phy_read(phydev, MII_BMCR); 2402 2403 if (bmcr < 0) 2404 return bmcr; 2405 2406 if (bmcr & BMCR_FULLDPLX) 2407 phydev->duplex = DUPLEX_FULL; 2408 else 2409 phydev->duplex = DUPLEX_HALF; 2410 } 2411 2412 return 0; 2413} 2414EXPORT_SYMBOL(genphy_c37_read_status); 2415 2416/** 2417 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit 2418 * @phydev: target phy_device struct 2419 * 2420 * Description: Perform a software PHY reset using the standard 2421 * BMCR_RESET bit and poll for the reset bit to be cleared. 2422 * 2423 * Returns: 0 on success, < 0 on failure 2424 */ 2425int genphy_soft_reset(struct phy_device *phydev) 2426{ 2427 u16 res = BMCR_RESET; 2428 int ret; 2429 2430 if (phydev->autoneg == AUTONEG_ENABLE) 2431 res |= BMCR_ANRESTART; 2432 2433 ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res); 2434 if (ret < 0) 2435 return ret; 2436 2437 /* Clause 22 states that setting bit BMCR_RESET sets control registers 2438 * to their default value. Therefore the POWER DOWN bit is supposed to 2439 * be cleared after soft reset. 2440 */ 2441 phydev->suspended = 0; 2442 2443 ret = phy_poll_reset(phydev); 2444 if (ret) 2445 return ret; 2446 2447 /* BMCR may be reset to defaults */ 2448 if (phydev->autoneg == AUTONEG_DISABLE) 2449 ret = genphy_setup_forced(phydev); 2450 2451 return ret; 2452} 2453EXPORT_SYMBOL(genphy_soft_reset); 2454 2455/** 2456 * genphy_read_abilities - read PHY abilities from Clause 22 registers 2457 * @phydev: target phy_device struct 2458 * 2459 * Description: Reads the PHY's abilities and populates 2460 * phydev->supported accordingly. 2461 * 2462 * Returns: 0 on success, < 0 on failure 2463 */ 2464int genphy_read_abilities(struct phy_device *phydev) 2465{ 2466 int val; 2467 2468 linkmode_set_bit_array(phy_basic_ports_array, 2469 ARRAY_SIZE(phy_basic_ports_array), 2470 phydev->supported); 2471 2472 val = phy_read(phydev, MII_BMSR); 2473 if (val < 0) 2474 return val; 2475 2476 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported, 2477 val & BMSR_ANEGCAPABLE); 2478 2479 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported, 2480 val & BMSR_100FULL); 2481 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported, 2482 val & BMSR_100HALF); 2483 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported, 2484 val & BMSR_10FULL); 2485 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported, 2486 val & BMSR_10HALF); 2487 2488 if (val & BMSR_ESTATEN) { 2489 val = phy_read(phydev, MII_ESTATUS); 2490 if (val < 0) 2491 return val; 2492 2493 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 2494 phydev->supported, val & ESTATUS_1000_TFULL); 2495 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 2496 phydev->supported, val & ESTATUS_1000_THALF); 2497 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 2498 phydev->supported, val & ESTATUS_1000_XFULL); 2499 } 2500 2501 return 0; 2502} 2503EXPORT_SYMBOL(genphy_read_abilities); 2504 2505/* This is used for the phy device which doesn't support the MMD extended 2506 * register access, but it does have side effect when we are trying to access 2507 * the MMD register via indirect method. 2508 */ 2509int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum) 2510{ 2511 return -EOPNOTSUPP; 2512} 2513EXPORT_SYMBOL(genphy_read_mmd_unsupported); 2514 2515int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum, 2516 u16 regnum, u16 val) 2517{ 2518 return -EOPNOTSUPP; 2519} 2520EXPORT_SYMBOL(genphy_write_mmd_unsupported); 2521 2522int genphy_suspend(struct phy_device *phydev) 2523{ 2524 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN); 2525} 2526EXPORT_SYMBOL(genphy_suspend); 2527 2528int genphy_resume(struct phy_device *phydev) 2529{ 2530 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN); 2531} 2532EXPORT_SYMBOL(genphy_resume); 2533 2534int genphy_loopback(struct phy_device *phydev, bool enable) 2535{ 2536 return phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 2537 enable ? BMCR_LOOPBACK : 0); 2538} 2539EXPORT_SYMBOL(genphy_loopback); 2540 2541/** 2542 * phy_remove_link_mode - Remove a supported link mode 2543 * @phydev: phy_device structure to remove link mode from 2544 * @link_mode: Link mode to be removed 2545 * 2546 * Description: Some MACs don't support all link modes which the PHY 2547 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper 2548 * to remove a link mode. 2549 */ 2550void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode) 2551{ 2552 linkmode_clear_bit(link_mode, phydev->supported); 2553 phy_advertise_supported(phydev); 2554} 2555EXPORT_SYMBOL(phy_remove_link_mode); 2556 2557static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src) 2558{ 2559 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst, 2560 linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src)); 2561 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst, 2562 linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src)); 2563} 2564 2565/** 2566 * phy_advertise_supported - Advertise all supported modes 2567 * @phydev: target phy_device struct 2568 * 2569 * Description: Called to advertise all supported modes, doesn't touch 2570 * pause mode advertising. 2571 */ 2572void phy_advertise_supported(struct phy_device *phydev) 2573{ 2574 __ETHTOOL_DECLARE_LINK_MODE_MASK(new); 2575 2576 linkmode_copy(new, phydev->supported); 2577 phy_copy_pause_bits(new, phydev->advertising); 2578 linkmode_copy(phydev->advertising, new); 2579} 2580EXPORT_SYMBOL(phy_advertise_supported); 2581 2582/** 2583 * phy_support_sym_pause - Enable support of symmetrical pause 2584 * @phydev: target phy_device struct 2585 * 2586 * Description: Called by the MAC to indicate is supports symmetrical 2587 * Pause, but not asym pause. 2588 */ 2589void phy_support_sym_pause(struct phy_device *phydev) 2590{ 2591 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported); 2592 phy_copy_pause_bits(phydev->advertising, phydev->supported); 2593} 2594EXPORT_SYMBOL(phy_support_sym_pause); 2595 2596/** 2597 * phy_support_asym_pause - Enable support of asym pause 2598 * @phydev: target phy_device struct 2599 * 2600 * Description: Called by the MAC to indicate is supports Asym Pause. 2601 */ 2602void phy_support_asym_pause(struct phy_device *phydev) 2603{ 2604 phy_copy_pause_bits(phydev->advertising, phydev->supported); 2605} 2606EXPORT_SYMBOL(phy_support_asym_pause); 2607 2608/** 2609 * phy_set_sym_pause - Configure symmetric Pause 2610 * @phydev: target phy_device struct 2611 * @rx: Receiver Pause is supported 2612 * @tx: Transmit Pause is supported 2613 * @autoneg: Auto neg should be used 2614 * 2615 * Description: Configure advertised Pause support depending on if 2616 * receiver pause and pause auto neg is supported. Generally called 2617 * from the set_pauseparam .ndo. 2618 */ 2619void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx, 2620 bool autoneg) 2621{ 2622 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported); 2623 2624 if (rx && tx && autoneg) 2625 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2626 phydev->supported); 2627 2628 linkmode_copy(phydev->advertising, phydev->supported); 2629} 2630EXPORT_SYMBOL(phy_set_sym_pause); 2631 2632/** 2633 * phy_set_asym_pause - Configure Pause and Asym Pause 2634 * @phydev: target phy_device struct 2635 * @rx: Receiver Pause is supported 2636 * @tx: Transmit Pause is supported 2637 * 2638 * Description: Configure advertised Pause support depending on if 2639 * transmit and receiver pause is supported. If there has been a 2640 * change in adverting, trigger a new autoneg. Generally called from 2641 * the set_pauseparam .ndo. 2642 */ 2643void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx) 2644{ 2645 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv); 2646 2647 linkmode_copy(oldadv, phydev->advertising); 2648 linkmode_set_pause(phydev->advertising, tx, rx); 2649 2650 if (!linkmode_equal(oldadv, phydev->advertising) && 2651 phydev->autoneg) 2652 phy_start_aneg(phydev); 2653} 2654EXPORT_SYMBOL(phy_set_asym_pause); 2655 2656/** 2657 * phy_validate_pause - Test if the PHY/MAC support the pause configuration 2658 * @phydev: phy_device struct 2659 * @pp: requested pause configuration 2660 * 2661 * Description: Test if the PHY/MAC combination supports the Pause 2662 * configuration the user is requesting. Returns True if it is 2663 * supported, false otherwise. 2664 */ 2665bool phy_validate_pause(struct phy_device *phydev, 2666 struct ethtool_pauseparam *pp) 2667{ 2668 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2669 phydev->supported) && pp->rx_pause) 2670 return false; 2671 2672 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2673 phydev->supported) && 2674 pp->rx_pause != pp->tx_pause) 2675 return false; 2676 2677 return true; 2678} 2679EXPORT_SYMBOL(phy_validate_pause); 2680 2681/** 2682 * phy_get_pause - resolve negotiated pause modes 2683 * @phydev: phy_device struct 2684 * @tx_pause: pointer to bool to indicate whether transmit pause should be 2685 * enabled. 2686 * @rx_pause: pointer to bool to indicate whether receive pause should be 2687 * enabled. 2688 * 2689 * Resolve and return the flow control modes according to the negotiation 2690 * result. This includes checking that we are operating in full duplex mode. 2691 * See linkmode_resolve_pause() for further details. 2692 */ 2693void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause) 2694{ 2695 if (phydev->duplex != DUPLEX_FULL) { 2696 *tx_pause = false; 2697 *rx_pause = false; 2698 return; 2699 } 2700 2701 return linkmode_resolve_pause(phydev->advertising, 2702 phydev->lp_advertising, 2703 tx_pause, rx_pause); 2704} 2705EXPORT_SYMBOL(phy_get_pause); 2706 2707#if IS_ENABLED(CONFIG_OF_MDIO) 2708static int phy_get_int_delay_property(struct device *dev, const char *name) 2709{ 2710 s32 int_delay; 2711 int ret; 2712 2713 ret = device_property_read_u32(dev, name, &int_delay); 2714 if (ret) 2715 return ret; 2716 2717 return int_delay; 2718} 2719#else 2720static int phy_get_int_delay_property(struct device *dev, const char *name) 2721{ 2722 return -EINVAL; 2723} 2724#endif 2725 2726/** 2727 * phy_get_delay_index - returns the index of the internal delay 2728 * @phydev: phy_device struct 2729 * @dev: pointer to the devices device struct 2730 * @delay_values: array of delays the PHY supports 2731 * @size: the size of the delay array 2732 * @is_rx: boolean to indicate to get the rx internal delay 2733 * 2734 * Returns the index within the array of internal delay passed in. 2735 * If the device property is not present then the interface type is checked 2736 * if the interface defines use of internal delay then a 1 is returned otherwise 2737 * a 0 is returned. 2738 * The array must be in ascending order. If PHY does not have an ascending order 2739 * array then size = 0 and the value of the delay property is returned. 2740 * Return -EINVAL if the delay is invalid or cannot be found. 2741 */ 2742s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev, 2743 const int *delay_values, int size, bool is_rx) 2744{ 2745 s32 delay; 2746 int i; 2747 2748 if (is_rx) { 2749 delay = phy_get_int_delay_property(dev, "rx-internal-delay-ps"); 2750 if (delay < 0 && size == 0) { 2751 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || 2752 phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) 2753 return 1; 2754 else 2755 return 0; 2756 } 2757 2758 } else { 2759 delay = phy_get_int_delay_property(dev, "tx-internal-delay-ps"); 2760 if (delay < 0 && size == 0) { 2761 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || 2762 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) 2763 return 1; 2764 else 2765 return 0; 2766 } 2767 } 2768 2769 if (delay < 0) 2770 return delay; 2771 2772 if (delay && size == 0) 2773 return delay; 2774 2775 if (delay < delay_values[0] || delay > delay_values[size - 1]) { 2776 phydev_err(phydev, "Delay %d is out of range\n", delay); 2777 return -EINVAL; 2778 } 2779 2780 if (delay == delay_values[0]) 2781 return 0; 2782 2783 for (i = 1; i < size; i++) { 2784 if (delay == delay_values[i]) 2785 return i; 2786 2787 /* Find an approximate index by looking up the table */ 2788 if (delay > delay_values[i - 1] && 2789 delay < delay_values[i]) { 2790 if (delay - delay_values[i - 1] < 2791 delay_values[i] - delay) 2792 return i - 1; 2793 else 2794 return i; 2795 } 2796 } 2797 2798 phydev_err(phydev, "error finding internal delay index for %d\n", 2799 delay); 2800 2801 return -EINVAL; 2802} 2803EXPORT_SYMBOL(phy_get_internal_delay); 2804 2805static bool phy_drv_supports_irq(struct phy_driver *phydrv) 2806{ 2807 return phydrv->config_intr && phydrv->ack_interrupt; 2808} 2809 2810/** 2811 * phy_probe - probe and init a PHY device 2812 * @dev: device to probe and init 2813 * 2814 * Description: Take care of setting up the phy_device structure, 2815 * set the state to READY (the driver's init function should 2816 * set it to STARTING if needed). 2817 */ 2818static int phy_probe(struct device *dev) 2819{ 2820 struct phy_device *phydev = to_phy_device(dev); 2821 struct device_driver *drv = phydev->mdio.dev.driver; 2822 struct phy_driver *phydrv = to_phy_driver(drv); 2823 int err = 0; 2824 2825 phydev->drv = phydrv; 2826 2827 /* Disable the interrupt if the PHY doesn't support it 2828 * but the interrupt is still a valid one 2829 */ 2830 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev)) 2831 phydev->irq = PHY_POLL; 2832 2833 if (phydrv->flags & PHY_IS_INTERNAL) 2834 phydev->is_internal = true; 2835 2836 /* Deassert the reset signal */ 2837 phy_device_reset(phydev, 0); 2838 2839 if (phydev->drv->probe) { 2840 err = phydev->drv->probe(phydev); 2841 if (err) 2842 goto out; 2843 } 2844 2845 /* Start out supporting everything. Eventually, 2846 * a controller will attach, and may modify one 2847 * or both of these values 2848 */ 2849 if (phydrv->features) { 2850 linkmode_copy(phydev->supported, phydrv->features); 2851 } else if (phydrv->get_features) { 2852 err = phydrv->get_features(phydev); 2853 } else if (phydev->is_c45) { 2854 err = genphy_c45_pma_read_abilities(phydev); 2855 } else { 2856 err = genphy_read_abilities(phydev); 2857 } 2858 2859 if (err) 2860 goto out; 2861 2862 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2863 phydev->supported)) 2864 phydev->autoneg = 0; 2865 2866 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 2867 phydev->supported)) 2868 phydev->is_gigabit_capable = 1; 2869 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 2870 phydev->supported)) 2871 phydev->is_gigabit_capable = 1; 2872 2873 of_set_phy_supported(phydev); 2874 phy_advertise_supported(phydev); 2875 2876 /* Get the EEE modes we want to prohibit. We will ask 2877 * the PHY stop advertising these mode later on 2878 */ 2879 of_set_phy_eee_broken(phydev); 2880 2881 /* The Pause Frame bits indicate that the PHY can support passing 2882 * pause frames. During autonegotiation, the PHYs will determine if 2883 * they should allow pause frames to pass. The MAC driver should then 2884 * use that result to determine whether to enable flow control via 2885 * pause frames. 2886 * 2887 * Normally, PHY drivers should not set the Pause bits, and instead 2888 * allow phylib to do that. However, there may be some situations 2889 * (e.g. hardware erratum) where the driver wants to set only one 2890 * of these bits. 2891 */ 2892 if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) && 2893 !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) { 2894 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2895 phydev->supported); 2896 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2897 phydev->supported); 2898 } 2899 2900 /* Set the state to READY by default */ 2901 phydev->state = PHY_READY; 2902 2903out: 2904 /* Re-assert the reset signal on error */ 2905 if (err) 2906 phy_device_reset(phydev, 1); 2907 2908 return err; 2909} 2910 2911static int phy_remove(struct device *dev) 2912{ 2913 struct phy_device *phydev = to_phy_device(dev); 2914 2915 cancel_delayed_work_sync(&phydev->state_queue); 2916 2917 phydev->state = PHY_DOWN; 2918 2919 sfp_bus_del_upstream(phydev->sfp_bus); 2920 phydev->sfp_bus = NULL; 2921 2922 if (phydev->drv && phydev->drv->remove) 2923 phydev->drv->remove(phydev); 2924 2925 /* Assert the reset signal */ 2926 phy_device_reset(phydev, 1); 2927 2928 phydev->drv = NULL; 2929 2930 return 0; 2931} 2932 2933/** 2934 * phy_driver_register - register a phy_driver with the PHY layer 2935 * @new_driver: new phy_driver to register 2936 * @owner: module owning this PHY 2937 */ 2938int phy_driver_register(struct phy_driver *new_driver, struct module *owner) 2939{ 2940 int retval; 2941 2942 /* Either the features are hard coded, or dynamically 2943 * determined. It cannot be both. 2944 */ 2945 if (WARN_ON(new_driver->features && new_driver->get_features)) { 2946 pr_err("%s: features and get_features must not both be set\n", 2947 new_driver->name); 2948 return -EINVAL; 2949 } 2950 2951 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY; 2952 new_driver->mdiodrv.driver.name = new_driver->name; 2953 new_driver->mdiodrv.driver.bus = &mdio_bus_type; 2954 new_driver->mdiodrv.driver.probe = phy_probe; 2955 new_driver->mdiodrv.driver.remove = phy_remove; 2956 new_driver->mdiodrv.driver.owner = owner; 2957 new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS; 2958 2959 retval = driver_register(&new_driver->mdiodrv.driver); 2960 if (retval) { 2961 pr_err("%s: Error %d in registering driver\n", 2962 new_driver->name, retval); 2963 2964 return retval; 2965 } 2966 2967 pr_debug("%s: Registered new driver\n", new_driver->name); 2968 2969 return 0; 2970} 2971EXPORT_SYMBOL(phy_driver_register); 2972 2973int phy_drivers_register(struct phy_driver *new_driver, int n, 2974 struct module *owner) 2975{ 2976 int i, ret = 0; 2977 2978 for (i = 0; i < n; i++) { 2979 ret = phy_driver_register(new_driver + i, owner); 2980 if (ret) { 2981 while (i-- > 0) 2982 phy_driver_unregister(new_driver + i); 2983 break; 2984 } 2985 } 2986 return ret; 2987} 2988EXPORT_SYMBOL(phy_drivers_register); 2989 2990void phy_driver_unregister(struct phy_driver *drv) 2991{ 2992 driver_unregister(&drv->mdiodrv.driver); 2993} 2994EXPORT_SYMBOL(phy_driver_unregister); 2995 2996void phy_drivers_unregister(struct phy_driver *drv, int n) 2997{ 2998 int i; 2999 3000 for (i = 0; i < n; i++) 3001 phy_driver_unregister(drv + i); 3002} 3003EXPORT_SYMBOL(phy_drivers_unregister); 3004 3005static struct phy_driver genphy_driver = { 3006 .phy_id = 0xffffffff, 3007 .phy_id_mask = 0xffffffff, 3008 .name = "Generic PHY", 3009 .get_features = genphy_read_abilities, 3010 .suspend = genphy_suspend, 3011 .resume = genphy_resume, 3012 .set_loopback = genphy_loopback, 3013}; 3014 3015static const struct ethtool_phy_ops phy_ethtool_phy_ops = { 3016 .get_sset_count = phy_ethtool_get_sset_count, 3017 .get_strings = phy_ethtool_get_strings, 3018 .get_stats = phy_ethtool_get_stats, 3019 .start_cable_test = phy_start_cable_test, 3020 .start_cable_test_tdr = phy_start_cable_test_tdr, 3021}; 3022 3023static int __init phy_init(void) 3024{ 3025 int rc; 3026 3027 ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops); 3028 3029 rc = mdio_bus_init(); 3030 if (rc) 3031 goto err_ethtool_phy_ops; 3032 3033 features_init(); 3034 3035 rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE); 3036 if (rc) 3037 goto err_mdio_bus; 3038 3039 rc = phy_driver_register(&genphy_driver, THIS_MODULE); 3040 if (rc) 3041 goto err_c45; 3042 3043 return 0; 3044 3045err_c45: 3046 phy_driver_unregister(&genphy_c45_driver); 3047err_mdio_bus: 3048 mdio_bus_exit(); 3049err_ethtool_phy_ops: 3050 ethtool_set_ethtool_phy_ops(NULL); 3051 3052 return rc; 3053} 3054 3055static void __exit phy_exit(void) 3056{ 3057 phy_driver_unregister(&genphy_c45_driver); 3058 phy_driver_unregister(&genphy_driver); 3059 mdio_bus_exit(); 3060 ethtool_set_ethtool_phy_ops(NULL); 3061} 3062 3063subsys_initcall(phy_init); 3064module_exit(phy_exit); 3065