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 36 MODULE_DESCRIPTION("PHY library"); 37 MODULE_AUTHOR("Andy Fleming"); 38 MODULE_LICENSE("GPL"); 39 40 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_features) __ro_after_init; 41 EXPORT_SYMBOL_GPL(phy_basic_features); 42 43 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1_features) __ro_after_init; 44 EXPORT_SYMBOL_GPL(phy_basic_t1_features); 45 46 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_features) __ro_after_init; 47 EXPORT_SYMBOL_GPL(phy_gbit_features); 48 49 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_fibre_features) __ro_after_init; 50 EXPORT_SYMBOL_GPL(phy_gbit_fibre_features); 51 52 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_all_ports_features) __ro_after_init; 53 EXPORT_SYMBOL_GPL(phy_gbit_all_ports_features); 54 55 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_features) __ro_after_init; 56 EXPORT_SYMBOL_GPL(phy_10gbit_features); 57 58 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_fec_features) __ro_after_init; 59 EXPORT_SYMBOL_GPL(phy_10gbit_fec_features); 60 61 const 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 }; 66 EXPORT_SYMBOL_GPL(phy_basic_ports_array); 67 68 const int phy_fibre_port_array[1] = { 69 ETHTOOL_LINK_MODE_FIBRE_BIT, 70 }; 71 EXPORT_SYMBOL_GPL(phy_fibre_port_array); 72 73 const 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 }; 82 EXPORT_SYMBOL_GPL(phy_all_ports_features_array); 83 84 const 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 }; 90 EXPORT_SYMBOL_GPL(phy_10_100_features_array); 91 92 const int phy_basic_t1_features_array[2] = { 93 ETHTOOL_LINK_MODE_TP_BIT, 94 ETHTOOL_LINK_MODE_100baseT1_Full_BIT, 95 }; 96 EXPORT_SYMBOL_GPL(phy_basic_t1_features_array); 97 98 const int phy_gbit_features_array[2] = { 99 ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 100 ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 101 }; 102 EXPORT_SYMBOL_GPL(phy_gbit_features_array); 103 104 const int phy_10gbit_features_array[1] = { 105 ETHTOOL_LINK_MODE_10000baseT_Full_BIT, 106 }; 107 EXPORT_SYMBOL_GPL(phy_10gbit_features_array); 108 109 static 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; 114 EXPORT_SYMBOL_GPL(phy_10gbit_full_features); 115 116 static 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 }; 122 123 static 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 } 200 201 void phy_device_free(struct phy_device *phydev) 202 { 203 put_device(&phydev->mdio.dev); 204 } 205 EXPORT_SYMBOL(phy_device_free); 206 207 static 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 } 214 215 static void phy_device_release(struct device *dev) 216 { 217 kfree(to_phy_device(dev)); 218 } 219 220 static 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 } 227 228 static struct phy_driver genphy_driver; 229 230 static LIST_HEAD(phy_fixup_list); 231 static DEFINE_MUTEX(phy_fixup_lock); 232 233 static 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; 267 268 out: 269 return !phydev->suspended; 270 } 271 272 static __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 } 291 292 static __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; 309 no_resume: 310 if (phydev->attached_dev && phydev->adjust_link) 311 phy_start_machine(phydev); 312 313 return 0; 314 } 315 316 static 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 */ 328 int 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 } 347 EXPORT_SYMBOL(phy_register_fixup); 348 349 /* Registers a fixup to be run on any PHY with the UID in phy_uid */ 350 int 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 } 355 EXPORT_SYMBOL(phy_register_fixup_for_uid); 356 357 /* Registers a fixup to be run on the PHY with id string bus_id */ 358 int 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 } 363 EXPORT_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 */ 371 int 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 } 396 EXPORT_SYMBOL(phy_unregister_fixup); 397 398 /* Unregisters a fixup of any PHY with the UID in phy_uid */ 399 int 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 } 403 EXPORT_SYMBOL(phy_unregister_fixup_for_uid); 404 405 /* Unregisters a fixup of the PHY with id string bus_id */ 406 int phy_unregister_fixup_for_id(const char *bus_id) 407 { 408 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff); 409 } 410 EXPORT_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 */ 415 static 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 */ 430 static 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 } 450 451 static 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 } 480 481 static ssize_t 482 phy_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 } 488 static DEVICE_ATTR_RO(phy_id); 489 490 static ssize_t 491 phy_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 } 503 static DEVICE_ATTR_RO(phy_interface); 504 505 static ssize_t 506 phy_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 } 513 static DEVICE_ATTR_RO(phy_has_fixups); 514 515 static 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 }; 521 ATTRIBUTE_GROUPS(phy_dev); 522 523 static 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 }; 529 530 static 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 } 549 550 struct 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 } 632 EXPORT_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 */ 645 static 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 */ 667 static 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 */ 698 static 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 */ 790 static 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 */ 838 struct 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 } 858 EXPORT_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 */ 864 int 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 } 897 EXPORT_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 */ 907 void 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 } 919 EXPORT_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 */ 925 struct 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 } 937 EXPORT_SYMBOL(phy_find_first); 938 939 static 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 */ 964 static 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 */ 977 int 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 } 996 EXPORT_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 */ 1013 struct 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 } 1038 EXPORT_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 */ 1045 void 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 } 1057 EXPORT_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 */ 1077 static 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 1093 int 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 } 1131 EXPORT_SYMBOL(phy_init_hw); 1132 1133 void phy_attached_info(struct phy_device *phydev) 1134 { 1135 phy_attached_print(phydev, NULL); 1136 } 1137 EXPORT_SYMBOL(phy_attached_info); 1138 1139 #define ATTACHED_FMT "attached PHY driver %s(mii_bus:phy_addr=%s, irq=%s)" 1140 char *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_MAC_INTERRUPT: 1150 irq_str = "MAC"; 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 } 1160 EXPORT_SYMBOL(phy_attached_info_irq); 1161 1162 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...) 1163 { 1164 const char *unbound = phydev->drv ? "" : "[unbound] "; 1165 char *irq_str = phy_attached_info_irq(phydev); 1166 1167 if (!fmt) { 1168 phydev_info(phydev, ATTACHED_FMT "\n", unbound, 1169 phydev_name(phydev), irq_str); 1170 } else { 1171 va_list ap; 1172 1173 phydev_info(phydev, ATTACHED_FMT, unbound, 1174 phydev_name(phydev), irq_str); 1175 1176 va_start(ap, fmt); 1177 vprintk(fmt, ap); 1178 va_end(ap); 1179 } 1180 kfree(irq_str); 1181 } 1182 EXPORT_SYMBOL(phy_attached_print); 1183 1184 static void phy_sysfs_create_links(struct phy_device *phydev) 1185 { 1186 struct net_device *dev = phydev->attached_dev; 1187 int err; 1188 1189 if (!dev) 1190 return; 1191 1192 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj, 1193 "attached_dev"); 1194 if (err) 1195 return; 1196 1197 err = sysfs_create_link_nowarn(&dev->dev.kobj, 1198 &phydev->mdio.dev.kobj, 1199 "phydev"); 1200 if (err) { 1201 dev_err(&dev->dev, "could not add device link to %s err %d\n", 1202 kobject_name(&phydev->mdio.dev.kobj), 1203 err); 1204 /* non-fatal - some net drivers can use one netdevice 1205 * with more then one phy 1206 */ 1207 } 1208 1209 phydev->sysfs_links = true; 1210 } 1211 1212 static ssize_t 1213 phy_standalone_show(struct device *dev, struct device_attribute *attr, 1214 char *buf) 1215 { 1216 struct phy_device *phydev = to_phy_device(dev); 1217 1218 return sprintf(buf, "%d\n", !phydev->attached_dev); 1219 } 1220 static DEVICE_ATTR_RO(phy_standalone); 1221 1222 /** 1223 * phy_sfp_attach - attach the SFP bus to the PHY upstream network device 1224 * @upstream: pointer to the phy device 1225 * @bus: sfp bus representing cage being attached 1226 * 1227 * This is used to fill in the sfp_upstream_ops .attach member. 1228 */ 1229 void phy_sfp_attach(void *upstream, struct sfp_bus *bus) 1230 { 1231 struct phy_device *phydev = upstream; 1232 1233 if (phydev->attached_dev) 1234 phydev->attached_dev->sfp_bus = bus; 1235 phydev->sfp_bus_attached = true; 1236 } 1237 EXPORT_SYMBOL(phy_sfp_attach); 1238 1239 /** 1240 * phy_sfp_detach - detach the SFP bus from the PHY upstream network device 1241 * @upstream: pointer to the phy device 1242 * @bus: sfp bus representing cage being attached 1243 * 1244 * This is used to fill in the sfp_upstream_ops .detach member. 1245 */ 1246 void phy_sfp_detach(void *upstream, struct sfp_bus *bus) 1247 { 1248 struct phy_device *phydev = upstream; 1249 1250 if (phydev->attached_dev) 1251 phydev->attached_dev->sfp_bus = NULL; 1252 phydev->sfp_bus_attached = false; 1253 } 1254 EXPORT_SYMBOL(phy_sfp_detach); 1255 1256 /** 1257 * phy_sfp_probe - probe for a SFP cage attached to this PHY device 1258 * @phydev: Pointer to phy_device 1259 * @ops: SFP's upstream operations 1260 */ 1261 int phy_sfp_probe(struct phy_device *phydev, 1262 const struct sfp_upstream_ops *ops) 1263 { 1264 struct sfp_bus *bus; 1265 int ret = 0; 1266 1267 if (phydev->mdio.dev.fwnode) { 1268 bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode); 1269 if (IS_ERR(bus)) 1270 return PTR_ERR(bus); 1271 1272 phydev->sfp_bus = bus; 1273 1274 ret = sfp_bus_add_upstream(bus, phydev, ops); 1275 sfp_bus_put(bus); 1276 } 1277 return ret; 1278 } 1279 EXPORT_SYMBOL(phy_sfp_probe); 1280 1281 /** 1282 * phy_attach_direct - attach a network device to a given PHY device pointer 1283 * @dev: network device to attach 1284 * @phydev: Pointer to phy_device to attach 1285 * @flags: PHY device's dev_flags 1286 * @interface: PHY device's interface 1287 * 1288 * Description: Called by drivers to attach to a particular PHY 1289 * device. The phy_device is found, and properly hooked up 1290 * to the phy_driver. If no driver is attached, then a 1291 * generic driver is used. The phy_device is given a ptr to 1292 * the attaching device, and given a callback for link status 1293 * change. The phy_device is returned to the attaching driver. 1294 * This function takes a reference on the phy device. 1295 */ 1296 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, 1297 u32 flags, phy_interface_t interface) 1298 { 1299 struct mii_bus *bus = phydev->mdio.bus; 1300 struct device *d = &phydev->mdio.dev; 1301 struct module *ndev_owner = NULL; 1302 bool using_genphy = false; 1303 int err; 1304 1305 /* For Ethernet device drivers that register their own MDIO bus, we 1306 * will have bus->owner match ndev_mod, so we do not want to increment 1307 * our own module->refcnt here, otherwise we would not be able to 1308 * unload later on. 1309 */ 1310 if (dev) 1311 ndev_owner = dev->dev.parent->driver->owner; 1312 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) { 1313 phydev_err(phydev, "failed to get the bus module\n"); 1314 return -EIO; 1315 } 1316 1317 get_device(d); 1318 1319 /* Assume that if there is no driver, that it doesn't 1320 * exist, and we should use the genphy driver. 1321 */ 1322 if (!d->driver) { 1323 if (phydev->is_c45) 1324 d->driver = &genphy_c45_driver.mdiodrv.driver; 1325 else 1326 d->driver = &genphy_driver.mdiodrv.driver; 1327 1328 using_genphy = true; 1329 } 1330 1331 if (!try_module_get(d->driver->owner)) { 1332 phydev_err(phydev, "failed to get the device driver module\n"); 1333 err = -EIO; 1334 goto error_put_device; 1335 } 1336 1337 if (using_genphy) { 1338 err = d->driver->probe(d); 1339 if (err >= 0) 1340 err = device_bind_driver(d); 1341 1342 if (err) 1343 goto error_module_put; 1344 } 1345 1346 if (phydev->attached_dev) { 1347 dev_err(&dev->dev, "PHY already attached\n"); 1348 err = -EBUSY; 1349 goto error; 1350 } 1351 1352 phydev->phy_link_change = phy_link_change; 1353 if (dev) { 1354 phydev->attached_dev = dev; 1355 dev->phydev = phydev; 1356 1357 if (phydev->sfp_bus_attached) 1358 dev->sfp_bus = phydev->sfp_bus; 1359 else if (dev->sfp_bus) 1360 phydev->is_on_sfp_module = true; 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 1419 error: 1420 /* phy_detach() does all of the cleanup below */ 1421 phy_detach(phydev); 1422 return err; 1423 1424 error_module_put: 1425 module_put(d->driver->owner); 1426 error_put_device: 1427 put_device(d); 1428 if (ndev_owner != bus->owner) 1429 module_put(bus->owner); 1430 return err; 1431 } 1432 EXPORT_SYMBOL(phy_attach_direct); 1433 1434 /** 1435 * phy_attach - attach a network device to a particular PHY device 1436 * @dev: network device to attach 1437 * @bus_id: Bus ID of PHY device to attach 1438 * @interface: PHY device's interface 1439 * 1440 * Description: Same as phy_attach_direct() except that a PHY bus_id 1441 * string is passed instead of a pointer to a struct phy_device. 1442 */ 1443 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, 1444 phy_interface_t interface) 1445 { 1446 struct bus_type *bus = &mdio_bus_type; 1447 struct phy_device *phydev; 1448 struct device *d; 1449 int rc; 1450 1451 if (!dev) 1452 return ERR_PTR(-EINVAL); 1453 1454 /* Search the list of PHY devices on the mdio bus for the 1455 * PHY with the requested name 1456 */ 1457 d = bus_find_device_by_name(bus, NULL, bus_id); 1458 if (!d) { 1459 pr_err("PHY %s not found\n", bus_id); 1460 return ERR_PTR(-ENODEV); 1461 } 1462 phydev = to_phy_device(d); 1463 1464 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); 1465 put_device(d); 1466 if (rc) 1467 return ERR_PTR(rc); 1468 1469 return phydev; 1470 } 1471 EXPORT_SYMBOL(phy_attach); 1472 1473 static bool phy_driver_is_genphy_kind(struct phy_device *phydev, 1474 struct device_driver *driver) 1475 { 1476 struct device *d = &phydev->mdio.dev; 1477 bool ret = false; 1478 1479 if (!phydev->drv) 1480 return ret; 1481 1482 get_device(d); 1483 ret = d->driver == driver; 1484 put_device(d); 1485 1486 return ret; 1487 } 1488 1489 bool phy_driver_is_genphy(struct phy_device *phydev) 1490 { 1491 return phy_driver_is_genphy_kind(phydev, 1492 &genphy_driver.mdiodrv.driver); 1493 } 1494 EXPORT_SYMBOL_GPL(phy_driver_is_genphy); 1495 1496 bool phy_driver_is_genphy_10g(struct phy_device *phydev) 1497 { 1498 return phy_driver_is_genphy_kind(phydev, 1499 &genphy_c45_driver.mdiodrv.driver); 1500 } 1501 EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g); 1502 1503 /** 1504 * phy_package_join - join a common PHY group 1505 * @phydev: target phy_device struct 1506 * @addr: cookie and PHY address for global register access 1507 * @priv_size: if non-zero allocate this amount of bytes for private data 1508 * 1509 * This joins a PHY group and provides a shared storage for all phydevs in 1510 * this group. This is intended to be used for packages which contain 1511 * more than one PHY, for example a quad PHY transceiver. 1512 * 1513 * The addr parameter serves as a cookie which has to have the same value 1514 * for all members of one group and as a PHY address to access generic 1515 * registers of a PHY package. Usually, one of the PHY addresses of the 1516 * different PHYs in the package provides access to these global registers. 1517 * The address which is given here, will be used in the phy_package_read() 1518 * and phy_package_write() convenience functions. If your PHY doesn't have 1519 * global registers you can just pick any of the PHY addresses. 1520 * 1521 * This will set the shared pointer of the phydev to the shared storage. 1522 * If this is the first call for a this cookie the shared storage will be 1523 * allocated. If priv_size is non-zero, the given amount of bytes are 1524 * allocated for the priv member. 1525 * 1526 * Returns < 1 on error, 0 on success. Esp. calling phy_package_join() 1527 * with the same cookie but a different priv_size is an error. 1528 */ 1529 int phy_package_join(struct phy_device *phydev, int addr, size_t priv_size) 1530 { 1531 struct mii_bus *bus = phydev->mdio.bus; 1532 struct phy_package_shared *shared; 1533 int ret; 1534 1535 if (addr < 0 || addr >= PHY_MAX_ADDR) 1536 return -EINVAL; 1537 1538 mutex_lock(&bus->shared_lock); 1539 shared = bus->shared[addr]; 1540 if (!shared) { 1541 ret = -ENOMEM; 1542 shared = kzalloc(sizeof(*shared), GFP_KERNEL); 1543 if (!shared) 1544 goto err_unlock; 1545 if (priv_size) { 1546 shared->priv = kzalloc(priv_size, GFP_KERNEL); 1547 if (!shared->priv) 1548 goto err_free; 1549 shared->priv_size = priv_size; 1550 } 1551 shared->addr = addr; 1552 refcount_set(&shared->refcnt, 1); 1553 bus->shared[addr] = shared; 1554 } else { 1555 ret = -EINVAL; 1556 if (priv_size && priv_size != shared->priv_size) 1557 goto err_unlock; 1558 refcount_inc(&shared->refcnt); 1559 } 1560 mutex_unlock(&bus->shared_lock); 1561 1562 phydev->shared = shared; 1563 1564 return 0; 1565 1566 err_free: 1567 kfree(shared); 1568 err_unlock: 1569 mutex_unlock(&bus->shared_lock); 1570 return ret; 1571 } 1572 EXPORT_SYMBOL_GPL(phy_package_join); 1573 1574 /** 1575 * phy_package_leave - leave a common PHY group 1576 * @phydev: target phy_device struct 1577 * 1578 * This leaves a PHY group created by phy_package_join(). If this phydev 1579 * was the last user of the shared data between the group, this data is 1580 * freed. Resets the phydev->shared pointer to NULL. 1581 */ 1582 void phy_package_leave(struct phy_device *phydev) 1583 { 1584 struct phy_package_shared *shared = phydev->shared; 1585 struct mii_bus *bus = phydev->mdio.bus; 1586 1587 if (!shared) 1588 return; 1589 1590 if (refcount_dec_and_mutex_lock(&shared->refcnt, &bus->shared_lock)) { 1591 bus->shared[shared->addr] = NULL; 1592 mutex_unlock(&bus->shared_lock); 1593 kfree(shared->priv); 1594 kfree(shared); 1595 } 1596 1597 phydev->shared = NULL; 1598 } 1599 EXPORT_SYMBOL_GPL(phy_package_leave); 1600 1601 static void devm_phy_package_leave(struct device *dev, void *res) 1602 { 1603 phy_package_leave(*(struct phy_device **)res); 1604 } 1605 1606 /** 1607 * devm_phy_package_join - resource managed phy_package_join() 1608 * @dev: device that is registering this PHY package 1609 * @phydev: target phy_device struct 1610 * @addr: cookie and PHY address for global register access 1611 * @priv_size: if non-zero allocate this amount of bytes for private data 1612 * 1613 * Managed phy_package_join(). Shared storage fetched by this function, 1614 * phy_package_leave() is automatically called on driver detach. See 1615 * phy_package_join() for more information. 1616 */ 1617 int devm_phy_package_join(struct device *dev, struct phy_device *phydev, 1618 int addr, size_t priv_size) 1619 { 1620 struct phy_device **ptr; 1621 int ret; 1622 1623 ptr = devres_alloc(devm_phy_package_leave, sizeof(*ptr), 1624 GFP_KERNEL); 1625 if (!ptr) 1626 return -ENOMEM; 1627 1628 ret = phy_package_join(phydev, addr, priv_size); 1629 1630 if (!ret) { 1631 *ptr = phydev; 1632 devres_add(dev, ptr); 1633 } else { 1634 devres_free(ptr); 1635 } 1636 1637 return ret; 1638 } 1639 EXPORT_SYMBOL_GPL(devm_phy_package_join); 1640 1641 /** 1642 * phy_detach - detach a PHY device from its network device 1643 * @phydev: target phy_device struct 1644 * 1645 * This detaches the phy device from its network device and the phy 1646 * driver, and drops the reference count taken in phy_attach_direct(). 1647 */ 1648 void phy_detach(struct phy_device *phydev) 1649 { 1650 struct net_device *dev = phydev->attached_dev; 1651 struct module *ndev_owner = NULL; 1652 struct mii_bus *bus; 1653 1654 if (phydev->sysfs_links) { 1655 if (dev) 1656 sysfs_remove_link(&dev->dev.kobj, "phydev"); 1657 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev"); 1658 } 1659 1660 if (!phydev->attached_dev) 1661 sysfs_remove_file(&phydev->mdio.dev.kobj, 1662 &dev_attr_phy_standalone.attr); 1663 1664 phy_suspend(phydev); 1665 if (dev) { 1666 phydev->attached_dev->phydev = NULL; 1667 phydev->attached_dev = NULL; 1668 } 1669 phydev->phylink = NULL; 1670 1671 phy_led_triggers_unregister(phydev); 1672 1673 if (phydev->mdio.dev.driver) 1674 module_put(phydev->mdio.dev.driver->owner); 1675 1676 /* If the device had no specific driver before (i.e. - it 1677 * was using the generic driver), we unbind the device 1678 * from the generic driver so that there's a chance a 1679 * real driver could be loaded 1680 */ 1681 if (phy_driver_is_genphy(phydev) || 1682 phy_driver_is_genphy_10g(phydev)) 1683 device_release_driver(&phydev->mdio.dev); 1684 1685 /* 1686 * The phydev might go away on the put_device() below, so avoid 1687 * a use-after-free bug by reading the underlying bus first. 1688 */ 1689 bus = phydev->mdio.bus; 1690 1691 put_device(&phydev->mdio.dev); 1692 if (dev) 1693 ndev_owner = dev->dev.parent->driver->owner; 1694 if (ndev_owner != bus->owner) 1695 module_put(bus->owner); 1696 1697 /* Assert the reset signal */ 1698 phy_device_reset(phydev, 1); 1699 } 1700 EXPORT_SYMBOL(phy_detach); 1701 1702 int phy_suspend(struct phy_device *phydev) 1703 { 1704 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; 1705 struct net_device *netdev = phydev->attached_dev; 1706 struct phy_driver *phydrv = phydev->drv; 1707 int ret; 1708 1709 if (phydev->suspended) 1710 return 0; 1711 1712 /* If the device has WOL enabled, we cannot suspend the PHY */ 1713 phy_ethtool_get_wol(phydev, &wol); 1714 if (wol.wolopts || (netdev && netdev->wol_enabled)) 1715 return -EBUSY; 1716 1717 if (!phydrv || !phydrv->suspend) 1718 return 0; 1719 1720 ret = phydrv->suspend(phydev); 1721 if (!ret) 1722 phydev->suspended = true; 1723 1724 return ret; 1725 } 1726 EXPORT_SYMBOL(phy_suspend); 1727 1728 int __phy_resume(struct phy_device *phydev) 1729 { 1730 struct phy_driver *phydrv = phydev->drv; 1731 int ret; 1732 1733 lockdep_assert_held(&phydev->lock); 1734 1735 if (!phydrv || !phydrv->resume) 1736 return 0; 1737 1738 ret = phydrv->resume(phydev); 1739 if (!ret) 1740 phydev->suspended = false; 1741 1742 return ret; 1743 } 1744 EXPORT_SYMBOL(__phy_resume); 1745 1746 int phy_resume(struct phy_device *phydev) 1747 { 1748 int ret; 1749 1750 mutex_lock(&phydev->lock); 1751 ret = __phy_resume(phydev); 1752 mutex_unlock(&phydev->lock); 1753 1754 return ret; 1755 } 1756 EXPORT_SYMBOL(phy_resume); 1757 1758 int phy_loopback(struct phy_device *phydev, bool enable) 1759 { 1760 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); 1761 int ret = 0; 1762 1763 mutex_lock(&phydev->lock); 1764 1765 if (enable && phydev->loopback_enabled) { 1766 ret = -EBUSY; 1767 goto out; 1768 } 1769 1770 if (!enable && !phydev->loopback_enabled) { 1771 ret = -EINVAL; 1772 goto out; 1773 } 1774 1775 if (phydev->drv && phydrv->set_loopback) 1776 ret = phydrv->set_loopback(phydev, enable); 1777 else 1778 ret = -EOPNOTSUPP; 1779 1780 if (ret) 1781 goto out; 1782 1783 phydev->loopback_enabled = enable; 1784 1785 out: 1786 mutex_unlock(&phydev->lock); 1787 return ret; 1788 } 1789 EXPORT_SYMBOL(phy_loopback); 1790 1791 /** 1792 * phy_reset_after_clk_enable - perform a PHY reset if needed 1793 * @phydev: target phy_device struct 1794 * 1795 * Description: Some PHYs are known to need a reset after their refclk was 1796 * enabled. This function evaluates the flags and perform the reset if it's 1797 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy 1798 * was reset. 1799 */ 1800 int phy_reset_after_clk_enable(struct phy_device *phydev) 1801 { 1802 if (!phydev || !phydev->drv) 1803 return -ENODEV; 1804 1805 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) { 1806 phy_device_reset(phydev, 1); 1807 phy_device_reset(phydev, 0); 1808 return 1; 1809 } 1810 1811 return 0; 1812 } 1813 EXPORT_SYMBOL(phy_reset_after_clk_enable); 1814 1815 /* Generic PHY support and helper functions */ 1816 1817 /** 1818 * genphy_config_advert - sanitize and advertise auto-negotiation parameters 1819 * @phydev: target phy_device struct 1820 * 1821 * Description: Writes MII_ADVERTISE with the appropriate values, 1822 * after sanitizing the values to make sure we only advertise 1823 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement 1824 * hasn't changed, and > 0 if it has changed. 1825 */ 1826 static int genphy_config_advert(struct phy_device *phydev) 1827 { 1828 int err, bmsr, changed = 0; 1829 u32 adv; 1830 1831 /* Only allow advertising what this PHY supports */ 1832 linkmode_and(phydev->advertising, phydev->advertising, 1833 phydev->supported); 1834 1835 adv = linkmode_adv_to_mii_adv_t(phydev->advertising); 1836 1837 /* Setup standard advertisement */ 1838 err = phy_modify_changed(phydev, MII_ADVERTISE, 1839 ADVERTISE_ALL | ADVERTISE_100BASE4 | 1840 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM, 1841 adv); 1842 if (err < 0) 1843 return err; 1844 if (err > 0) 1845 changed = 1; 1846 1847 bmsr = phy_read(phydev, MII_BMSR); 1848 if (bmsr < 0) 1849 return bmsr; 1850 1851 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all 1852 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a 1853 * logical 1. 1854 */ 1855 if (!(bmsr & BMSR_ESTATEN)) 1856 return changed; 1857 1858 adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising); 1859 1860 err = phy_modify_changed(phydev, MII_CTRL1000, 1861 ADVERTISE_1000FULL | ADVERTISE_1000HALF, 1862 adv); 1863 if (err < 0) 1864 return err; 1865 if (err > 0) 1866 changed = 1; 1867 1868 return changed; 1869 } 1870 1871 /** 1872 * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters 1873 * @phydev: target phy_device struct 1874 * 1875 * Description: Writes MII_ADVERTISE with the appropriate values, 1876 * after sanitizing the values to make sure we only advertise 1877 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement 1878 * hasn't changed, and > 0 if it has changed. This function is intended 1879 * for Clause 37 1000Base-X mode. 1880 */ 1881 static int genphy_c37_config_advert(struct phy_device *phydev) 1882 { 1883 u16 adv = 0; 1884 1885 /* Only allow advertising what this PHY supports */ 1886 linkmode_and(phydev->advertising, phydev->advertising, 1887 phydev->supported); 1888 1889 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 1890 phydev->advertising)) 1891 adv |= ADVERTISE_1000XFULL; 1892 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 1893 phydev->advertising)) 1894 adv |= ADVERTISE_1000XPAUSE; 1895 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 1896 phydev->advertising)) 1897 adv |= ADVERTISE_1000XPSE_ASYM; 1898 1899 return phy_modify_changed(phydev, MII_ADVERTISE, 1900 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE | 1901 ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM, 1902 adv); 1903 } 1904 1905 /** 1906 * genphy_config_eee_advert - disable unwanted eee mode advertisement 1907 * @phydev: target phy_device struct 1908 * 1909 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy 1910 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't 1911 * changed, and 1 if it has changed. 1912 */ 1913 int genphy_config_eee_advert(struct phy_device *phydev) 1914 { 1915 int err; 1916 1917 /* Nothing to disable */ 1918 if (!phydev->eee_broken_modes) 1919 return 0; 1920 1921 err = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, 1922 phydev->eee_broken_modes, 0); 1923 /* If the call failed, we assume that EEE is not supported */ 1924 return err < 0 ? 0 : err; 1925 } 1926 EXPORT_SYMBOL(genphy_config_eee_advert); 1927 1928 /** 1929 * genphy_setup_forced - configures/forces speed/duplex from @phydev 1930 * @phydev: target phy_device struct 1931 * 1932 * Description: Configures MII_BMCR to force speed/duplex 1933 * to the values in phydev. Assumes that the values are valid. 1934 * Please see phy_sanitize_settings(). 1935 */ 1936 int genphy_setup_forced(struct phy_device *phydev) 1937 { 1938 u16 ctl = 0; 1939 1940 phydev->pause = 0; 1941 phydev->asym_pause = 0; 1942 1943 if (SPEED_1000 == phydev->speed) 1944 ctl |= BMCR_SPEED1000; 1945 else if (SPEED_100 == phydev->speed) 1946 ctl |= BMCR_SPEED100; 1947 1948 if (DUPLEX_FULL == phydev->duplex) 1949 ctl |= BMCR_FULLDPLX; 1950 1951 return phy_modify(phydev, MII_BMCR, 1952 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl); 1953 } 1954 EXPORT_SYMBOL(genphy_setup_forced); 1955 1956 static int genphy_setup_master_slave(struct phy_device *phydev) 1957 { 1958 u16 ctl = 0; 1959 1960 if (!phydev->is_gigabit_capable) 1961 return 0; 1962 1963 switch (phydev->master_slave_set) { 1964 case MASTER_SLAVE_CFG_MASTER_PREFERRED: 1965 ctl |= CTL1000_PREFER_MASTER; 1966 break; 1967 case MASTER_SLAVE_CFG_SLAVE_PREFERRED: 1968 break; 1969 case MASTER_SLAVE_CFG_MASTER_FORCE: 1970 ctl |= CTL1000_AS_MASTER; 1971 fallthrough; 1972 case MASTER_SLAVE_CFG_SLAVE_FORCE: 1973 ctl |= CTL1000_ENABLE_MASTER; 1974 break; 1975 case MASTER_SLAVE_CFG_UNKNOWN: 1976 case MASTER_SLAVE_CFG_UNSUPPORTED: 1977 return 0; 1978 default: 1979 phydev_warn(phydev, "Unsupported Master/Slave mode\n"); 1980 return -EOPNOTSUPP; 1981 } 1982 1983 return phy_modify_changed(phydev, MII_CTRL1000, 1984 (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER | 1985 CTL1000_PREFER_MASTER), ctl); 1986 } 1987 1988 static int genphy_read_master_slave(struct phy_device *phydev) 1989 { 1990 int cfg, state; 1991 int val; 1992 1993 if (!phydev->is_gigabit_capable) { 1994 phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED; 1995 phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED; 1996 return 0; 1997 } 1998 1999 phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN; 2000 phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN; 2001 2002 val = phy_read(phydev, MII_CTRL1000); 2003 if (val < 0) 2004 return val; 2005 2006 if (val & CTL1000_ENABLE_MASTER) { 2007 if (val & CTL1000_AS_MASTER) 2008 cfg = MASTER_SLAVE_CFG_MASTER_FORCE; 2009 else 2010 cfg = MASTER_SLAVE_CFG_SLAVE_FORCE; 2011 } else { 2012 if (val & CTL1000_PREFER_MASTER) 2013 cfg = MASTER_SLAVE_CFG_MASTER_PREFERRED; 2014 else 2015 cfg = MASTER_SLAVE_CFG_SLAVE_PREFERRED; 2016 } 2017 2018 val = phy_read(phydev, MII_STAT1000); 2019 if (val < 0) 2020 return val; 2021 2022 if (val & LPA_1000MSFAIL) { 2023 state = MASTER_SLAVE_STATE_ERR; 2024 } else if (phydev->link) { 2025 /* this bits are valid only for active link */ 2026 if (val & LPA_1000MSRES) 2027 state = MASTER_SLAVE_STATE_MASTER; 2028 else 2029 state = MASTER_SLAVE_STATE_SLAVE; 2030 } else { 2031 state = MASTER_SLAVE_STATE_UNKNOWN; 2032 } 2033 2034 phydev->master_slave_get = cfg; 2035 phydev->master_slave_state = state; 2036 2037 return 0; 2038 } 2039 2040 /** 2041 * genphy_restart_aneg - Enable and Restart Autonegotiation 2042 * @phydev: target phy_device struct 2043 */ 2044 int genphy_restart_aneg(struct phy_device *phydev) 2045 { 2046 /* Don't isolate the PHY if we're negotiating */ 2047 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, 2048 BMCR_ANENABLE | BMCR_ANRESTART); 2049 } 2050 EXPORT_SYMBOL(genphy_restart_aneg); 2051 2052 /** 2053 * genphy_check_and_restart_aneg - Enable and restart auto-negotiation 2054 * @phydev: target phy_device struct 2055 * @restart: whether aneg restart is requested 2056 * 2057 * Check, and restart auto-negotiation if needed. 2058 */ 2059 int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart) 2060 { 2061 int ret; 2062 2063 if (!restart) { 2064 /* Advertisement hasn't changed, but maybe aneg was never on to 2065 * begin with? Or maybe phy was isolated? 2066 */ 2067 ret = phy_read(phydev, MII_BMCR); 2068 if (ret < 0) 2069 return ret; 2070 2071 if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE)) 2072 restart = true; 2073 } 2074 2075 if (restart) 2076 return genphy_restart_aneg(phydev); 2077 2078 return 0; 2079 } 2080 EXPORT_SYMBOL(genphy_check_and_restart_aneg); 2081 2082 /** 2083 * __genphy_config_aneg - restart auto-negotiation or write BMCR 2084 * @phydev: target phy_device struct 2085 * @changed: whether autoneg is requested 2086 * 2087 * Description: If auto-negotiation is enabled, we configure the 2088 * advertising, and then restart auto-negotiation. If it is not 2089 * enabled, then we write the BMCR. 2090 */ 2091 int __genphy_config_aneg(struct phy_device *phydev, bool changed) 2092 { 2093 int err; 2094 2095 if (genphy_config_eee_advert(phydev)) 2096 changed = true; 2097 2098 err = genphy_setup_master_slave(phydev); 2099 if (err < 0) 2100 return err; 2101 else if (err) 2102 changed = true; 2103 2104 if (AUTONEG_ENABLE != phydev->autoneg) 2105 return genphy_setup_forced(phydev); 2106 2107 err = genphy_config_advert(phydev); 2108 if (err < 0) /* error */ 2109 return err; 2110 else if (err) 2111 changed = true; 2112 2113 return genphy_check_and_restart_aneg(phydev, changed); 2114 } 2115 EXPORT_SYMBOL(__genphy_config_aneg); 2116 2117 /** 2118 * genphy_c37_config_aneg - restart auto-negotiation or write BMCR 2119 * @phydev: target phy_device struct 2120 * 2121 * Description: If auto-negotiation is enabled, we configure the 2122 * advertising, and then restart auto-negotiation. If it is not 2123 * enabled, then we write the BMCR. This function is intended 2124 * for use with Clause 37 1000Base-X mode. 2125 */ 2126 int genphy_c37_config_aneg(struct phy_device *phydev) 2127 { 2128 int err, changed; 2129 2130 if (phydev->autoneg != AUTONEG_ENABLE) 2131 return genphy_setup_forced(phydev); 2132 2133 err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100, 2134 BMCR_SPEED1000); 2135 if (err) 2136 return err; 2137 2138 changed = genphy_c37_config_advert(phydev); 2139 if (changed < 0) /* error */ 2140 return changed; 2141 2142 if (!changed) { 2143 /* Advertisement hasn't changed, but maybe aneg was never on to 2144 * begin with? Or maybe phy was isolated? 2145 */ 2146 int ctl = phy_read(phydev, MII_BMCR); 2147 2148 if (ctl < 0) 2149 return ctl; 2150 2151 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) 2152 changed = 1; /* do restart aneg */ 2153 } 2154 2155 /* Only restart aneg if we are advertising something different 2156 * than we were before. 2157 */ 2158 if (changed > 0) 2159 return genphy_restart_aneg(phydev); 2160 2161 return 0; 2162 } 2163 EXPORT_SYMBOL(genphy_c37_config_aneg); 2164 2165 /** 2166 * genphy_aneg_done - return auto-negotiation status 2167 * @phydev: target phy_device struct 2168 * 2169 * Description: Reads the status register and returns 0 either if 2170 * auto-negotiation is incomplete, or if there was an error. 2171 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. 2172 */ 2173 int genphy_aneg_done(struct phy_device *phydev) 2174 { 2175 int retval = phy_read(phydev, MII_BMSR); 2176 2177 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); 2178 } 2179 EXPORT_SYMBOL(genphy_aneg_done); 2180 2181 /** 2182 * genphy_update_link - update link status in @phydev 2183 * @phydev: target phy_device struct 2184 * 2185 * Description: Update the value in phydev->link to reflect the 2186 * current link value. In order to do this, we need to read 2187 * the status register twice, keeping the second value. 2188 */ 2189 int genphy_update_link(struct phy_device *phydev) 2190 { 2191 int status = 0, bmcr; 2192 2193 bmcr = phy_read(phydev, MII_BMCR); 2194 if (bmcr < 0) 2195 return bmcr; 2196 2197 /* Autoneg is being started, therefore disregard BMSR value and 2198 * report link as down. 2199 */ 2200 if (bmcr & BMCR_ANRESTART) 2201 goto done; 2202 2203 /* The link state is latched low so that momentary link 2204 * drops can be detected. Do not double-read the status 2205 * in polling mode to detect such short link drops except 2206 * the link was already down. 2207 */ 2208 if (!phy_polling_mode(phydev) || !phydev->link) { 2209 status = phy_read(phydev, MII_BMSR); 2210 if (status < 0) 2211 return status; 2212 else if (status & BMSR_LSTATUS) 2213 goto done; 2214 } 2215 2216 /* Read link and autonegotiation status */ 2217 status = phy_read(phydev, MII_BMSR); 2218 if (status < 0) 2219 return status; 2220 done: 2221 phydev->link = status & BMSR_LSTATUS ? 1 : 0; 2222 phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0; 2223 2224 /* Consider the case that autoneg was started and "aneg complete" 2225 * bit has been reset, but "link up" bit not yet. 2226 */ 2227 if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete) 2228 phydev->link = 0; 2229 2230 return 0; 2231 } 2232 EXPORT_SYMBOL(genphy_update_link); 2233 2234 int genphy_read_lpa(struct phy_device *phydev) 2235 { 2236 int lpa, lpagb; 2237 2238 if (phydev->autoneg == AUTONEG_ENABLE) { 2239 if (!phydev->autoneg_complete) { 2240 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, 2241 0); 2242 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0); 2243 return 0; 2244 } 2245 2246 if (phydev->is_gigabit_capable) { 2247 lpagb = phy_read(phydev, MII_STAT1000); 2248 if (lpagb < 0) 2249 return lpagb; 2250 2251 if (lpagb & LPA_1000MSFAIL) { 2252 int adv = phy_read(phydev, MII_CTRL1000); 2253 2254 if (adv < 0) 2255 return adv; 2256 2257 if (adv & CTL1000_ENABLE_MASTER) 2258 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n"); 2259 else 2260 phydev_err(phydev, "Master/Slave resolution failed\n"); 2261 return -ENOLINK; 2262 } 2263 2264 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, 2265 lpagb); 2266 } 2267 2268 lpa = phy_read(phydev, MII_LPA); 2269 if (lpa < 0) 2270 return lpa; 2271 2272 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa); 2273 } else { 2274 linkmode_zero(phydev->lp_advertising); 2275 } 2276 2277 return 0; 2278 } 2279 EXPORT_SYMBOL(genphy_read_lpa); 2280 2281 /** 2282 * genphy_read_status_fixed - read the link parameters for !aneg mode 2283 * @phydev: target phy_device struct 2284 * 2285 * Read the current duplex and speed state for a PHY operating with 2286 * autonegotiation disabled. 2287 */ 2288 int genphy_read_status_fixed(struct phy_device *phydev) 2289 { 2290 int bmcr = phy_read(phydev, MII_BMCR); 2291 2292 if (bmcr < 0) 2293 return bmcr; 2294 2295 if (bmcr & BMCR_FULLDPLX) 2296 phydev->duplex = DUPLEX_FULL; 2297 else 2298 phydev->duplex = DUPLEX_HALF; 2299 2300 if (bmcr & BMCR_SPEED1000) 2301 phydev->speed = SPEED_1000; 2302 else if (bmcr & BMCR_SPEED100) 2303 phydev->speed = SPEED_100; 2304 else 2305 phydev->speed = SPEED_10; 2306 2307 return 0; 2308 } 2309 EXPORT_SYMBOL(genphy_read_status_fixed); 2310 2311 /** 2312 * genphy_read_status - check the link status and update current link state 2313 * @phydev: target phy_device struct 2314 * 2315 * Description: Check the link, then figure out the current state 2316 * by comparing what we advertise with what the link partner 2317 * advertises. Start by checking the gigabit possibilities, 2318 * then move on to 10/100. 2319 */ 2320 int genphy_read_status(struct phy_device *phydev) 2321 { 2322 int err, old_link = phydev->link; 2323 2324 /* Update the link, but return if there was an error */ 2325 err = genphy_update_link(phydev); 2326 if (err) 2327 return err; 2328 2329 /* why bother the PHY if nothing can have changed */ 2330 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) 2331 return 0; 2332 2333 phydev->speed = SPEED_UNKNOWN; 2334 phydev->duplex = DUPLEX_UNKNOWN; 2335 phydev->pause = 0; 2336 phydev->asym_pause = 0; 2337 2338 err = genphy_read_master_slave(phydev); 2339 if (err < 0) 2340 return err; 2341 2342 err = genphy_read_lpa(phydev); 2343 if (err < 0) 2344 return err; 2345 2346 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { 2347 phy_resolve_aneg_linkmode(phydev); 2348 } else if (phydev->autoneg == AUTONEG_DISABLE) { 2349 err = genphy_read_status_fixed(phydev); 2350 if (err < 0) 2351 return err; 2352 } 2353 2354 return 0; 2355 } 2356 EXPORT_SYMBOL(genphy_read_status); 2357 2358 /** 2359 * genphy_c37_read_status - check the link status and update current link state 2360 * @phydev: target phy_device struct 2361 * 2362 * Description: Check the link, then figure out the current state 2363 * by comparing what we advertise with what the link partner 2364 * advertises. This function is for Clause 37 1000Base-X mode. 2365 */ 2366 int genphy_c37_read_status(struct phy_device *phydev) 2367 { 2368 int lpa, err, old_link = phydev->link; 2369 2370 /* Update the link, but return if there was an error */ 2371 err = genphy_update_link(phydev); 2372 if (err) 2373 return err; 2374 2375 /* why bother the PHY if nothing can have changed */ 2376 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) 2377 return 0; 2378 2379 phydev->duplex = DUPLEX_UNKNOWN; 2380 phydev->pause = 0; 2381 phydev->asym_pause = 0; 2382 2383 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { 2384 lpa = phy_read(phydev, MII_LPA); 2385 if (lpa < 0) 2386 return lpa; 2387 2388 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2389 phydev->lp_advertising, lpa & LPA_LPACK); 2390 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 2391 phydev->lp_advertising, lpa & LPA_1000XFULL); 2392 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2393 phydev->lp_advertising, lpa & LPA_1000XPAUSE); 2394 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2395 phydev->lp_advertising, 2396 lpa & LPA_1000XPAUSE_ASYM); 2397 2398 phy_resolve_aneg_linkmode(phydev); 2399 } else if (phydev->autoneg == AUTONEG_DISABLE) { 2400 int bmcr = phy_read(phydev, MII_BMCR); 2401 2402 if (bmcr < 0) 2403 return bmcr; 2404 2405 if (bmcr & BMCR_FULLDPLX) 2406 phydev->duplex = DUPLEX_FULL; 2407 else 2408 phydev->duplex = DUPLEX_HALF; 2409 } 2410 2411 return 0; 2412 } 2413 EXPORT_SYMBOL(genphy_c37_read_status); 2414 2415 /** 2416 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit 2417 * @phydev: target phy_device struct 2418 * 2419 * Description: Perform a software PHY reset using the standard 2420 * BMCR_RESET bit and poll for the reset bit to be cleared. 2421 * 2422 * Returns: 0 on success, < 0 on failure 2423 */ 2424 int genphy_soft_reset(struct phy_device *phydev) 2425 { 2426 u16 res = BMCR_RESET; 2427 int ret; 2428 2429 if (phydev->autoneg == AUTONEG_ENABLE) 2430 res |= BMCR_ANRESTART; 2431 2432 ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res); 2433 if (ret < 0) 2434 return ret; 2435 2436 /* Clause 22 states that setting bit BMCR_RESET sets control registers 2437 * to their default value. Therefore the POWER DOWN bit is supposed to 2438 * be cleared after soft reset. 2439 */ 2440 phydev->suspended = 0; 2441 2442 ret = phy_poll_reset(phydev); 2443 if (ret) 2444 return ret; 2445 2446 /* BMCR may be reset to defaults */ 2447 if (phydev->autoneg == AUTONEG_DISABLE) 2448 ret = genphy_setup_forced(phydev); 2449 2450 return ret; 2451 } 2452 EXPORT_SYMBOL(genphy_soft_reset); 2453 2454 irqreturn_t genphy_handle_interrupt_no_ack(struct phy_device *phydev) 2455 { 2456 /* It seems there are cases where the interrupts are handled by another 2457 * entity (ie an IRQ controller embedded inside the PHY) and do not 2458 * need any other interraction from phylib. In this case, just trigger 2459 * the state machine directly. 2460 */ 2461 phy_trigger_machine(phydev); 2462 2463 return 0; 2464 } 2465 EXPORT_SYMBOL(genphy_handle_interrupt_no_ack); 2466 2467 /** 2468 * genphy_read_abilities - read PHY abilities from Clause 22 registers 2469 * @phydev: target phy_device struct 2470 * 2471 * Description: Reads the PHY's abilities and populates 2472 * phydev->supported accordingly. 2473 * 2474 * Returns: 0 on success, < 0 on failure 2475 */ 2476 int genphy_read_abilities(struct phy_device *phydev) 2477 { 2478 int val; 2479 2480 linkmode_set_bit_array(phy_basic_ports_array, 2481 ARRAY_SIZE(phy_basic_ports_array), 2482 phydev->supported); 2483 2484 val = phy_read(phydev, MII_BMSR); 2485 if (val < 0) 2486 return val; 2487 2488 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported, 2489 val & BMSR_ANEGCAPABLE); 2490 2491 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported, 2492 val & BMSR_100FULL); 2493 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported, 2494 val & BMSR_100HALF); 2495 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported, 2496 val & BMSR_10FULL); 2497 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported, 2498 val & BMSR_10HALF); 2499 2500 if (val & BMSR_ESTATEN) { 2501 val = phy_read(phydev, MII_ESTATUS); 2502 if (val < 0) 2503 return val; 2504 2505 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 2506 phydev->supported, val & ESTATUS_1000_TFULL); 2507 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 2508 phydev->supported, val & ESTATUS_1000_THALF); 2509 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 2510 phydev->supported, val & ESTATUS_1000_XFULL); 2511 } 2512 2513 return 0; 2514 } 2515 EXPORT_SYMBOL(genphy_read_abilities); 2516 2517 /* This is used for the phy device which doesn't support the MMD extended 2518 * register access, but it does have side effect when we are trying to access 2519 * the MMD register via indirect method. 2520 */ 2521 int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum) 2522 { 2523 return -EOPNOTSUPP; 2524 } 2525 EXPORT_SYMBOL(genphy_read_mmd_unsupported); 2526 2527 int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum, 2528 u16 regnum, u16 val) 2529 { 2530 return -EOPNOTSUPP; 2531 } 2532 EXPORT_SYMBOL(genphy_write_mmd_unsupported); 2533 2534 int genphy_suspend(struct phy_device *phydev) 2535 { 2536 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN); 2537 } 2538 EXPORT_SYMBOL(genphy_suspend); 2539 2540 int genphy_resume(struct phy_device *phydev) 2541 { 2542 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN); 2543 } 2544 EXPORT_SYMBOL(genphy_resume); 2545 2546 int genphy_loopback(struct phy_device *phydev, bool enable) 2547 { 2548 return phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 2549 enable ? BMCR_LOOPBACK : 0); 2550 } 2551 EXPORT_SYMBOL(genphy_loopback); 2552 2553 /** 2554 * phy_remove_link_mode - Remove a supported link mode 2555 * @phydev: phy_device structure to remove link mode from 2556 * @link_mode: Link mode to be removed 2557 * 2558 * Description: Some MACs don't support all link modes which the PHY 2559 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper 2560 * to remove a link mode. 2561 */ 2562 void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode) 2563 { 2564 linkmode_clear_bit(link_mode, phydev->supported); 2565 phy_advertise_supported(phydev); 2566 } 2567 EXPORT_SYMBOL(phy_remove_link_mode); 2568 2569 static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src) 2570 { 2571 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst, 2572 linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src)); 2573 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst, 2574 linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src)); 2575 } 2576 2577 /** 2578 * phy_advertise_supported - Advertise all supported modes 2579 * @phydev: target phy_device struct 2580 * 2581 * Description: Called to advertise all supported modes, doesn't touch 2582 * pause mode advertising. 2583 */ 2584 void phy_advertise_supported(struct phy_device *phydev) 2585 { 2586 __ETHTOOL_DECLARE_LINK_MODE_MASK(new); 2587 2588 linkmode_copy(new, phydev->supported); 2589 phy_copy_pause_bits(new, phydev->advertising); 2590 linkmode_copy(phydev->advertising, new); 2591 } 2592 EXPORT_SYMBOL(phy_advertise_supported); 2593 2594 /** 2595 * phy_support_sym_pause - Enable support of symmetrical pause 2596 * @phydev: target phy_device struct 2597 * 2598 * Description: Called by the MAC to indicate is supports symmetrical 2599 * Pause, but not asym pause. 2600 */ 2601 void phy_support_sym_pause(struct phy_device *phydev) 2602 { 2603 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported); 2604 phy_copy_pause_bits(phydev->advertising, phydev->supported); 2605 } 2606 EXPORT_SYMBOL(phy_support_sym_pause); 2607 2608 /** 2609 * phy_support_asym_pause - Enable support of asym pause 2610 * @phydev: target phy_device struct 2611 * 2612 * Description: Called by the MAC to indicate is supports Asym Pause. 2613 */ 2614 void phy_support_asym_pause(struct phy_device *phydev) 2615 { 2616 phy_copy_pause_bits(phydev->advertising, phydev->supported); 2617 } 2618 EXPORT_SYMBOL(phy_support_asym_pause); 2619 2620 /** 2621 * phy_set_sym_pause - Configure symmetric Pause 2622 * @phydev: target phy_device struct 2623 * @rx: Receiver Pause is supported 2624 * @tx: Transmit Pause is supported 2625 * @autoneg: Auto neg should be used 2626 * 2627 * Description: Configure advertised Pause support depending on if 2628 * receiver pause and pause auto neg is supported. Generally called 2629 * from the set_pauseparam .ndo. 2630 */ 2631 void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx, 2632 bool autoneg) 2633 { 2634 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported); 2635 2636 if (rx && tx && autoneg) 2637 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2638 phydev->supported); 2639 2640 linkmode_copy(phydev->advertising, phydev->supported); 2641 } 2642 EXPORT_SYMBOL(phy_set_sym_pause); 2643 2644 /** 2645 * phy_set_asym_pause - Configure Pause and Asym Pause 2646 * @phydev: target phy_device struct 2647 * @rx: Receiver Pause is supported 2648 * @tx: Transmit Pause is supported 2649 * 2650 * Description: Configure advertised Pause support depending on if 2651 * transmit and receiver pause is supported. If there has been a 2652 * change in adverting, trigger a new autoneg. Generally called from 2653 * the set_pauseparam .ndo. 2654 */ 2655 void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx) 2656 { 2657 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv); 2658 2659 linkmode_copy(oldadv, phydev->advertising); 2660 linkmode_set_pause(phydev->advertising, tx, rx); 2661 2662 if (!linkmode_equal(oldadv, phydev->advertising) && 2663 phydev->autoneg) 2664 phy_start_aneg(phydev); 2665 } 2666 EXPORT_SYMBOL(phy_set_asym_pause); 2667 2668 /** 2669 * phy_validate_pause - Test if the PHY/MAC support the pause configuration 2670 * @phydev: phy_device struct 2671 * @pp: requested pause configuration 2672 * 2673 * Description: Test if the PHY/MAC combination supports the Pause 2674 * configuration the user is requesting. Returns True if it is 2675 * supported, false otherwise. 2676 */ 2677 bool phy_validate_pause(struct phy_device *phydev, 2678 struct ethtool_pauseparam *pp) 2679 { 2680 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2681 phydev->supported) && pp->rx_pause) 2682 return false; 2683 2684 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2685 phydev->supported) && 2686 pp->rx_pause != pp->tx_pause) 2687 return false; 2688 2689 return true; 2690 } 2691 EXPORT_SYMBOL(phy_validate_pause); 2692 2693 /** 2694 * phy_get_pause - resolve negotiated pause modes 2695 * @phydev: phy_device struct 2696 * @tx_pause: pointer to bool to indicate whether transmit pause should be 2697 * enabled. 2698 * @rx_pause: pointer to bool to indicate whether receive pause should be 2699 * enabled. 2700 * 2701 * Resolve and return the flow control modes according to the negotiation 2702 * result. This includes checking that we are operating in full duplex mode. 2703 * See linkmode_resolve_pause() for further details. 2704 */ 2705 void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause) 2706 { 2707 if (phydev->duplex != DUPLEX_FULL) { 2708 *tx_pause = false; 2709 *rx_pause = false; 2710 return; 2711 } 2712 2713 return linkmode_resolve_pause(phydev->advertising, 2714 phydev->lp_advertising, 2715 tx_pause, rx_pause); 2716 } 2717 EXPORT_SYMBOL(phy_get_pause); 2718 2719 #if IS_ENABLED(CONFIG_OF_MDIO) 2720 static int phy_get_int_delay_property(struct device *dev, const char *name) 2721 { 2722 s32 int_delay; 2723 int ret; 2724 2725 ret = device_property_read_u32(dev, name, &int_delay); 2726 if (ret) 2727 return ret; 2728 2729 return int_delay; 2730 } 2731 #else 2732 static int phy_get_int_delay_property(struct device *dev, const char *name) 2733 { 2734 return -EINVAL; 2735 } 2736 #endif 2737 2738 /** 2739 * phy_get_internal_delay - returns the index of the internal delay 2740 * @phydev: phy_device struct 2741 * @dev: pointer to the devices device struct 2742 * @delay_values: array of delays the PHY supports 2743 * @size: the size of the delay array 2744 * @is_rx: boolean to indicate to get the rx internal delay 2745 * 2746 * Returns the index within the array of internal delay passed in. 2747 * If the device property is not present then the interface type is checked 2748 * if the interface defines use of internal delay then a 1 is returned otherwise 2749 * a 0 is returned. 2750 * The array must be in ascending order. If PHY does not have an ascending order 2751 * array then size = 0 and the value of the delay property is returned. 2752 * Return -EINVAL if the delay is invalid or cannot be found. 2753 */ 2754 s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev, 2755 const int *delay_values, int size, bool is_rx) 2756 { 2757 s32 delay; 2758 int i; 2759 2760 if (is_rx) { 2761 delay = phy_get_int_delay_property(dev, "rx-internal-delay-ps"); 2762 if (delay < 0 && size == 0) { 2763 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || 2764 phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) 2765 return 1; 2766 else 2767 return 0; 2768 } 2769 2770 } else { 2771 delay = phy_get_int_delay_property(dev, "tx-internal-delay-ps"); 2772 if (delay < 0 && size == 0) { 2773 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || 2774 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) 2775 return 1; 2776 else 2777 return 0; 2778 } 2779 } 2780 2781 if (delay < 0) 2782 return delay; 2783 2784 if (delay && size == 0) 2785 return delay; 2786 2787 if (delay < delay_values[0] || delay > delay_values[size - 1]) { 2788 phydev_err(phydev, "Delay %d is out of range\n", delay); 2789 return -EINVAL; 2790 } 2791 2792 if (delay == delay_values[0]) 2793 return 0; 2794 2795 for (i = 1; i < size; i++) { 2796 if (delay == delay_values[i]) 2797 return i; 2798 2799 /* Find an approximate index by looking up the table */ 2800 if (delay > delay_values[i - 1] && 2801 delay < delay_values[i]) { 2802 if (delay - delay_values[i - 1] < 2803 delay_values[i] - delay) 2804 return i - 1; 2805 else 2806 return i; 2807 } 2808 } 2809 2810 phydev_err(phydev, "error finding internal delay index for %d\n", 2811 delay); 2812 2813 return -EINVAL; 2814 } 2815 EXPORT_SYMBOL(phy_get_internal_delay); 2816 2817 static bool phy_drv_supports_irq(struct phy_driver *phydrv) 2818 { 2819 return phydrv->config_intr && phydrv->handle_interrupt; 2820 } 2821 2822 /** 2823 * phy_probe - probe and init a PHY device 2824 * @dev: device to probe and init 2825 * 2826 * Description: Take care of setting up the phy_device structure, 2827 * set the state to READY (the driver's init function should 2828 * set it to STARTING if needed). 2829 */ 2830 static int phy_probe(struct device *dev) 2831 { 2832 struct phy_device *phydev = to_phy_device(dev); 2833 struct device_driver *drv = phydev->mdio.dev.driver; 2834 struct phy_driver *phydrv = to_phy_driver(drv); 2835 int err = 0; 2836 2837 phydev->drv = phydrv; 2838 2839 /* Disable the interrupt if the PHY doesn't support it 2840 * but the interrupt is still a valid one 2841 */ 2842 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev)) 2843 phydev->irq = PHY_POLL; 2844 2845 if (phydrv->flags & PHY_IS_INTERNAL) 2846 phydev->is_internal = true; 2847 2848 mutex_lock(&phydev->lock); 2849 2850 /* Deassert the reset signal */ 2851 phy_device_reset(phydev, 0); 2852 2853 if (phydev->drv->probe) { 2854 err = phydev->drv->probe(phydev); 2855 if (err) 2856 goto out; 2857 } 2858 2859 /* Start out supporting everything. Eventually, 2860 * a controller will attach, and may modify one 2861 * or both of these values 2862 */ 2863 if (phydrv->features) { 2864 linkmode_copy(phydev->supported, phydrv->features); 2865 } else if (phydrv->get_features) { 2866 err = phydrv->get_features(phydev); 2867 } else if (phydev->is_c45) { 2868 err = genphy_c45_pma_read_abilities(phydev); 2869 } else { 2870 err = genphy_read_abilities(phydev); 2871 } 2872 2873 if (err) 2874 goto out; 2875 2876 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2877 phydev->supported)) 2878 phydev->autoneg = 0; 2879 2880 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 2881 phydev->supported)) 2882 phydev->is_gigabit_capable = 1; 2883 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 2884 phydev->supported)) 2885 phydev->is_gigabit_capable = 1; 2886 2887 of_set_phy_supported(phydev); 2888 phy_advertise_supported(phydev); 2889 2890 /* Get the EEE modes we want to prohibit. We will ask 2891 * the PHY stop advertising these mode later on 2892 */ 2893 of_set_phy_eee_broken(phydev); 2894 2895 /* The Pause Frame bits indicate that the PHY can support passing 2896 * pause frames. During autonegotiation, the PHYs will determine if 2897 * they should allow pause frames to pass. The MAC driver should then 2898 * use that result to determine whether to enable flow control via 2899 * pause frames. 2900 * 2901 * Normally, PHY drivers should not set the Pause bits, and instead 2902 * allow phylib to do that. However, there may be some situations 2903 * (e.g. hardware erratum) where the driver wants to set only one 2904 * of these bits. 2905 */ 2906 if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) && 2907 !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) { 2908 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2909 phydev->supported); 2910 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2911 phydev->supported); 2912 } 2913 2914 /* Set the state to READY by default */ 2915 phydev->state = PHY_READY; 2916 2917 out: 2918 /* Assert the reset signal */ 2919 if (err) 2920 phy_device_reset(phydev, 1); 2921 2922 mutex_unlock(&phydev->lock); 2923 2924 return err; 2925 } 2926 2927 static int phy_remove(struct device *dev) 2928 { 2929 struct phy_device *phydev = to_phy_device(dev); 2930 2931 cancel_delayed_work_sync(&phydev->state_queue); 2932 2933 mutex_lock(&phydev->lock); 2934 phydev->state = PHY_DOWN; 2935 mutex_unlock(&phydev->lock); 2936 2937 sfp_bus_del_upstream(phydev->sfp_bus); 2938 phydev->sfp_bus = NULL; 2939 2940 if (phydev->drv && phydev->drv->remove) 2941 phydev->drv->remove(phydev); 2942 2943 /* Assert the reset signal */ 2944 phy_device_reset(phydev, 1); 2945 2946 phydev->drv = NULL; 2947 2948 return 0; 2949 } 2950 2951 static void phy_shutdown(struct device *dev) 2952 { 2953 struct phy_device *phydev = to_phy_device(dev); 2954 2955 phy_disable_interrupts(phydev); 2956 } 2957 2958 /** 2959 * phy_driver_register - register a phy_driver with the PHY layer 2960 * @new_driver: new phy_driver to register 2961 * @owner: module owning this PHY 2962 */ 2963 int phy_driver_register(struct phy_driver *new_driver, struct module *owner) 2964 { 2965 int retval; 2966 2967 /* Either the features are hard coded, or dynamically 2968 * determined. It cannot be both. 2969 */ 2970 if (WARN_ON(new_driver->features && new_driver->get_features)) { 2971 pr_err("%s: features and get_features must not both be set\n", 2972 new_driver->name); 2973 return -EINVAL; 2974 } 2975 2976 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY; 2977 new_driver->mdiodrv.driver.name = new_driver->name; 2978 new_driver->mdiodrv.driver.bus = &mdio_bus_type; 2979 new_driver->mdiodrv.driver.probe = phy_probe; 2980 new_driver->mdiodrv.driver.remove = phy_remove; 2981 new_driver->mdiodrv.driver.shutdown = phy_shutdown; 2982 new_driver->mdiodrv.driver.owner = owner; 2983 new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS; 2984 2985 retval = driver_register(&new_driver->mdiodrv.driver); 2986 if (retval) { 2987 pr_err("%s: Error %d in registering driver\n", 2988 new_driver->name, retval); 2989 2990 return retval; 2991 } 2992 2993 pr_debug("%s: Registered new driver\n", new_driver->name); 2994 2995 return 0; 2996 } 2997 EXPORT_SYMBOL(phy_driver_register); 2998 2999 int phy_drivers_register(struct phy_driver *new_driver, int n, 3000 struct module *owner) 3001 { 3002 int i, ret = 0; 3003 3004 for (i = 0; i < n; i++) { 3005 ret = phy_driver_register(new_driver + i, owner); 3006 if (ret) { 3007 while (i-- > 0) 3008 phy_driver_unregister(new_driver + i); 3009 break; 3010 } 3011 } 3012 return ret; 3013 } 3014 EXPORT_SYMBOL(phy_drivers_register); 3015 3016 void phy_driver_unregister(struct phy_driver *drv) 3017 { 3018 driver_unregister(&drv->mdiodrv.driver); 3019 } 3020 EXPORT_SYMBOL(phy_driver_unregister); 3021 3022 void phy_drivers_unregister(struct phy_driver *drv, int n) 3023 { 3024 int i; 3025 3026 for (i = 0; i < n; i++) 3027 phy_driver_unregister(drv + i); 3028 } 3029 EXPORT_SYMBOL(phy_drivers_unregister); 3030 3031 static struct phy_driver genphy_driver = { 3032 .phy_id = 0xffffffff, 3033 .phy_id_mask = 0xffffffff, 3034 .name = "Generic PHY", 3035 .get_features = genphy_read_abilities, 3036 .suspend = genphy_suspend, 3037 .resume = genphy_resume, 3038 .set_loopback = genphy_loopback, 3039 }; 3040 3041 static const struct ethtool_phy_ops phy_ethtool_phy_ops = { 3042 .get_sset_count = phy_ethtool_get_sset_count, 3043 .get_strings = phy_ethtool_get_strings, 3044 .get_stats = phy_ethtool_get_stats, 3045 .start_cable_test = phy_start_cable_test, 3046 .start_cable_test_tdr = phy_start_cable_test_tdr, 3047 }; 3048 3049 static int __init phy_init(void) 3050 { 3051 int rc; 3052 3053 rc = mdio_bus_init(); 3054 if (rc) 3055 return rc; 3056 3057 ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops); 3058 features_init(); 3059 3060 rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE); 3061 if (rc) 3062 goto err_c45; 3063 3064 rc = phy_driver_register(&genphy_driver, THIS_MODULE); 3065 if (rc) { 3066 phy_driver_unregister(&genphy_c45_driver); 3067 err_c45: 3068 mdio_bus_exit(); 3069 } 3070 3071 return rc; 3072 } 3073 3074 static void __exit phy_exit(void) 3075 { 3076 phy_driver_unregister(&genphy_c45_driver); 3077 phy_driver_unregister(&genphy_driver); 3078 mdio_bus_exit(); 3079 ethtool_set_ethtool_phy_ops(NULL); 3080 } 3081 3082 subsys_initcall(phy_init); 3083 module_exit(phy_exit); 3084