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 #ifdef CONFIG_PM 234 static bool mdio_bus_phy_may_suspend(struct phy_device *phydev) 235 { 236 struct device_driver *drv = phydev->mdio.dev.driver; 237 struct phy_driver *phydrv = to_phy_driver(drv); 238 struct net_device *netdev = phydev->attached_dev; 239 240 if (!drv || !phydrv->suspend) 241 return false; 242 243 /* PHY not attached? May suspend if the PHY has not already been 244 * suspended as part of a prior call to phy_disconnect() -> 245 * phy_detach() -> phy_suspend() because the parent netdev might be the 246 * MDIO bus driver and clock gated at this point. 247 */ 248 if (!netdev) 249 goto out; 250 251 if (netdev->wol_enabled) 252 return false; 253 254 /* As long as not all affected network drivers support the 255 * wol_enabled flag, let's check for hints that WoL is enabled. 256 * Don't suspend PHY if the attached netdev parent may wake up. 257 * The parent may point to a PCI device, as in tg3 driver. 258 */ 259 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent)) 260 return false; 261 262 /* Also don't suspend PHY if the netdev itself may wakeup. This 263 * is the case for devices w/o underlaying pwr. mgmt. aware bus, 264 * e.g. SoC devices. 265 */ 266 if (device_may_wakeup(&netdev->dev)) 267 return false; 268 269 out: 270 return !phydev->suspended; 271 } 272 273 static int mdio_bus_phy_suspend(struct device *dev) 274 { 275 struct phy_device *phydev = to_phy_device(dev); 276 277 /* We must stop the state machine manually, otherwise it stops out of 278 * control, possibly with the phydev->lock held. Upon resume, netdev 279 * may call phy routines that try to grab the same lock, and that may 280 * lead to a deadlock. 281 */ 282 if (phydev->attached_dev && phydev->adjust_link) 283 phy_stop_machine(phydev); 284 285 if (!mdio_bus_phy_may_suspend(phydev)) 286 return 0; 287 288 phydev->suspended_by_mdio_bus = 1; 289 290 return phy_suspend(phydev); 291 } 292 293 static int mdio_bus_phy_resume(struct device *dev) 294 { 295 struct phy_device *phydev = to_phy_device(dev); 296 int ret; 297 298 if (!phydev->suspended_by_mdio_bus) 299 goto no_resume; 300 301 phydev->suspended_by_mdio_bus = 0; 302 303 ret = phy_init_hw(phydev); 304 if (ret < 0) 305 return ret; 306 307 ret = phy_resume(phydev); 308 if (ret < 0) 309 return ret; 310 no_resume: 311 if (phydev->attached_dev && phydev->adjust_link) 312 phy_start_machine(phydev); 313 314 return 0; 315 } 316 317 static SIMPLE_DEV_PM_OPS(mdio_bus_phy_pm_ops, mdio_bus_phy_suspend, 318 mdio_bus_phy_resume); 319 #endif /* CONFIG_PM */ 320 321 /** 322 * phy_register_fixup - creates a new phy_fixup and adds it to the list 323 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID) 324 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) 325 * It can also be PHY_ANY_UID 326 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before 327 * comparison 328 * @run: The actual code to be run when a matching PHY is found 329 */ 330 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, 331 int (*run)(struct phy_device *)) 332 { 333 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); 334 335 if (!fixup) 336 return -ENOMEM; 337 338 strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); 339 fixup->phy_uid = phy_uid; 340 fixup->phy_uid_mask = phy_uid_mask; 341 fixup->run = run; 342 343 mutex_lock(&phy_fixup_lock); 344 list_add_tail(&fixup->list, &phy_fixup_list); 345 mutex_unlock(&phy_fixup_lock); 346 347 return 0; 348 } 349 EXPORT_SYMBOL(phy_register_fixup); 350 351 /* Registers a fixup to be run on any PHY with the UID in phy_uid */ 352 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, 353 int (*run)(struct phy_device *)) 354 { 355 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); 356 } 357 EXPORT_SYMBOL(phy_register_fixup_for_uid); 358 359 /* Registers a fixup to be run on the PHY with id string bus_id */ 360 int phy_register_fixup_for_id(const char *bus_id, 361 int (*run)(struct phy_device *)) 362 { 363 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); 364 } 365 EXPORT_SYMBOL(phy_register_fixup_for_id); 366 367 /** 368 * phy_unregister_fixup - remove a phy_fixup from the list 369 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list 370 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list 371 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison 372 */ 373 int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask) 374 { 375 struct list_head *pos, *n; 376 struct phy_fixup *fixup; 377 int ret; 378 379 ret = -ENODEV; 380 381 mutex_lock(&phy_fixup_lock); 382 list_for_each_safe(pos, n, &phy_fixup_list) { 383 fixup = list_entry(pos, struct phy_fixup, list); 384 385 if ((!strcmp(fixup->bus_id, bus_id)) && 386 ((fixup->phy_uid & phy_uid_mask) == 387 (phy_uid & phy_uid_mask))) { 388 list_del(&fixup->list); 389 kfree(fixup); 390 ret = 0; 391 break; 392 } 393 } 394 mutex_unlock(&phy_fixup_lock); 395 396 return ret; 397 } 398 EXPORT_SYMBOL(phy_unregister_fixup); 399 400 /* Unregisters a fixup of any PHY with the UID in phy_uid */ 401 int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask) 402 { 403 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask); 404 } 405 EXPORT_SYMBOL(phy_unregister_fixup_for_uid); 406 407 /* Unregisters a fixup of the PHY with id string bus_id */ 408 int phy_unregister_fixup_for_id(const char *bus_id) 409 { 410 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff); 411 } 412 EXPORT_SYMBOL(phy_unregister_fixup_for_id); 413 414 /* Returns 1 if fixup matches phydev in bus_id and phy_uid. 415 * Fixups can be set to match any in one or more fields. 416 */ 417 static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) 418 { 419 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0) 420 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) 421 return 0; 422 423 if ((fixup->phy_uid & fixup->phy_uid_mask) != 424 (phydev->phy_id & fixup->phy_uid_mask)) 425 if (fixup->phy_uid != PHY_ANY_UID) 426 return 0; 427 428 return 1; 429 } 430 431 /* Runs any matching fixups for this phydev */ 432 static int phy_scan_fixups(struct phy_device *phydev) 433 { 434 struct phy_fixup *fixup; 435 436 mutex_lock(&phy_fixup_lock); 437 list_for_each_entry(fixup, &phy_fixup_list, list) { 438 if (phy_needs_fixup(phydev, fixup)) { 439 int err = fixup->run(phydev); 440 441 if (err < 0) { 442 mutex_unlock(&phy_fixup_lock); 443 return err; 444 } 445 phydev->has_fixups = true; 446 } 447 } 448 mutex_unlock(&phy_fixup_lock); 449 450 return 0; 451 } 452 453 static int phy_bus_match(struct device *dev, struct device_driver *drv) 454 { 455 struct phy_device *phydev = to_phy_device(dev); 456 struct phy_driver *phydrv = to_phy_driver(drv); 457 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids); 458 int i; 459 460 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY)) 461 return 0; 462 463 if (phydrv->match_phy_device) 464 return phydrv->match_phy_device(phydev); 465 466 if (phydev->is_c45) { 467 for (i = 1; i < num_ids; i++) { 468 if (phydev->c45_ids.device_ids[i] == 0xffffffff) 469 continue; 470 471 if ((phydrv->phy_id & phydrv->phy_id_mask) == 472 (phydev->c45_ids.device_ids[i] & 473 phydrv->phy_id_mask)) 474 return 1; 475 } 476 return 0; 477 } else { 478 return (phydrv->phy_id & phydrv->phy_id_mask) == 479 (phydev->phy_id & phydrv->phy_id_mask); 480 } 481 } 482 483 static ssize_t 484 phy_id_show(struct device *dev, struct device_attribute *attr, char *buf) 485 { 486 struct phy_device *phydev = to_phy_device(dev); 487 488 return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id); 489 } 490 static DEVICE_ATTR_RO(phy_id); 491 492 static ssize_t 493 phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf) 494 { 495 struct phy_device *phydev = to_phy_device(dev); 496 const char *mode = NULL; 497 498 if (phy_is_internal(phydev)) 499 mode = "internal"; 500 else 501 mode = phy_modes(phydev->interface); 502 503 return sprintf(buf, "%s\n", mode); 504 } 505 static DEVICE_ATTR_RO(phy_interface); 506 507 static ssize_t 508 phy_has_fixups_show(struct device *dev, struct device_attribute *attr, 509 char *buf) 510 { 511 struct phy_device *phydev = to_phy_device(dev); 512 513 return sprintf(buf, "%d\n", phydev->has_fixups); 514 } 515 static DEVICE_ATTR_RO(phy_has_fixups); 516 517 static struct attribute *phy_dev_attrs[] = { 518 &dev_attr_phy_id.attr, 519 &dev_attr_phy_interface.attr, 520 &dev_attr_phy_has_fixups.attr, 521 NULL, 522 }; 523 ATTRIBUTE_GROUPS(phy_dev); 524 525 static const struct device_type mdio_bus_phy_type = { 526 .name = "PHY", 527 .groups = phy_dev_groups, 528 .release = phy_device_release, 529 .pm = pm_ptr(&mdio_bus_phy_pm_ops), 530 }; 531 532 static int phy_request_driver_module(struct phy_device *dev, u32 phy_id) 533 { 534 int ret; 535 536 ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, 537 MDIO_ID_ARGS(phy_id)); 538 /* We only check for failures in executing the usermode binary, 539 * not whether a PHY driver module exists for the PHY ID. 540 * Accept -ENOENT because this may occur in case no initramfs exists, 541 * then modprobe isn't available. 542 */ 543 if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) { 544 phydev_err(dev, "error %d loading PHY driver module for ID 0x%08lx\n", 545 ret, (unsigned long)phy_id); 546 return ret; 547 } 548 549 return 0; 550 } 551 552 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id, 553 bool is_c45, 554 struct phy_c45_device_ids *c45_ids) 555 { 556 struct phy_device *dev; 557 struct mdio_device *mdiodev; 558 int ret = 0; 559 560 /* We allocate the device, and initialize the default values */ 561 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 562 if (!dev) 563 return ERR_PTR(-ENOMEM); 564 565 mdiodev = &dev->mdio; 566 mdiodev->dev.parent = &bus->dev; 567 mdiodev->dev.bus = &mdio_bus_type; 568 mdiodev->dev.type = &mdio_bus_phy_type; 569 mdiodev->bus = bus; 570 mdiodev->bus_match = phy_bus_match; 571 mdiodev->addr = addr; 572 mdiodev->flags = MDIO_DEVICE_FLAG_PHY; 573 mdiodev->device_free = phy_mdio_device_free; 574 mdiodev->device_remove = phy_mdio_device_remove; 575 576 dev->speed = SPEED_UNKNOWN; 577 dev->duplex = DUPLEX_UNKNOWN; 578 dev->pause = 0; 579 dev->asym_pause = 0; 580 dev->link = 0; 581 dev->port = PORT_TP; 582 dev->interface = PHY_INTERFACE_MODE_GMII; 583 584 dev->autoneg = AUTONEG_ENABLE; 585 586 dev->is_c45 = is_c45; 587 dev->phy_id = phy_id; 588 if (c45_ids) 589 dev->c45_ids = *c45_ids; 590 dev->irq = bus->irq[addr]; 591 592 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr); 593 device_initialize(&mdiodev->dev); 594 595 dev->state = PHY_DOWN; 596 597 mutex_init(&dev->lock); 598 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); 599 600 /* Request the appropriate module unconditionally; don't 601 * bother trying to do so only if it isn't already loaded, 602 * because that gets complicated. A hotplug event would have 603 * done an unconditional modprobe anyway. 604 * We don't do normal hotplug because it won't work for MDIO 605 * -- because it relies on the device staying around for long 606 * enough for the driver to get loaded. With MDIO, the NIC 607 * driver will get bored and give up as soon as it finds that 608 * there's no driver _already_ loaded. 609 */ 610 if (is_c45 && c45_ids) { 611 const int num_ids = ARRAY_SIZE(c45_ids->device_ids); 612 int i; 613 614 for (i = 1; i < num_ids; i++) { 615 if (c45_ids->device_ids[i] == 0xffffffff) 616 continue; 617 618 ret = phy_request_driver_module(dev, 619 c45_ids->device_ids[i]); 620 if (ret) 621 break; 622 } 623 } else { 624 ret = phy_request_driver_module(dev, phy_id); 625 } 626 627 if (ret) { 628 put_device(&mdiodev->dev); 629 dev = ERR_PTR(ret); 630 } 631 632 return dev; 633 } 634 EXPORT_SYMBOL(phy_device_create); 635 636 /* phy_c45_probe_present - checks to see if a MMD is present in the package 637 * @bus: the target MII bus 638 * @prtad: PHY package address on the MII bus 639 * @devad: PHY device (MMD) address 640 * 641 * Read the MDIO_STAT2 register, and check whether a device is responding 642 * at this address. 643 * 644 * Returns: negative error number on bus access error, zero if no device 645 * is responding, or positive if a device is present. 646 */ 647 static int phy_c45_probe_present(struct mii_bus *bus, int prtad, int devad) 648 { 649 int stat2; 650 651 stat2 = mdiobus_c45_read(bus, prtad, devad, MDIO_STAT2); 652 if (stat2 < 0) 653 return stat2; 654 655 return (stat2 & MDIO_STAT2_DEVPRST) == MDIO_STAT2_DEVPRST_VAL; 656 } 657 658 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers. 659 * @bus: the target MII bus 660 * @addr: PHY address on the MII bus 661 * @dev_addr: MMD address in the PHY. 662 * @devices_in_package: where to store the devices in package information. 663 * 664 * Description: reads devices in package registers of a MMD at @dev_addr 665 * from PHY at @addr on @bus. 666 * 667 * Returns: 0 on success, -EIO on failure. 668 */ 669 static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr, 670 u32 *devices_in_package) 671 { 672 int phy_reg; 673 674 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS2); 675 if (phy_reg < 0) 676 return -EIO; 677 *devices_in_package = phy_reg << 16; 678 679 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS1); 680 if (phy_reg < 0) 681 return -EIO; 682 *devices_in_package |= phy_reg; 683 684 return 0; 685 } 686 687 /** 688 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. 689 * @bus: the target MII bus 690 * @addr: PHY address on the MII bus 691 * @c45_ids: where to store the c45 ID information. 692 * 693 * Read the PHY "devices in package". If this appears to be valid, read 694 * the PHY identifiers for each device. Return the "devices in package" 695 * and identifiers in @c45_ids. 696 * 697 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if 698 * the "devices in package" is invalid. 699 */ 700 static int get_phy_c45_ids(struct mii_bus *bus, int addr, 701 struct phy_c45_device_ids *c45_ids) 702 { 703 const int num_ids = ARRAY_SIZE(c45_ids->device_ids); 704 u32 devs_in_pkg = 0; 705 int i, ret, phy_reg; 706 707 /* Find first non-zero Devices In package. Device zero is reserved 708 * for 802.3 c45 complied PHYs, so don't probe it at first. 709 */ 710 for (i = 1; i < MDIO_MMD_NUM && (devs_in_pkg == 0 || 711 (devs_in_pkg & 0x1fffffff) == 0x1fffffff); i++) { 712 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) { 713 /* Check that there is a device present at this 714 * address before reading the devices-in-package 715 * register to avoid reading garbage from the PHY. 716 * Some PHYs (88x3310) vendor space is not IEEE802.3 717 * compliant. 718 */ 719 ret = phy_c45_probe_present(bus, addr, i); 720 if (ret < 0) 721 return -EIO; 722 723 if (!ret) 724 continue; 725 } 726 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, &devs_in_pkg); 727 if (phy_reg < 0) 728 return -EIO; 729 } 730 731 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) { 732 /* If mostly Fs, there is no device there, then let's probe 733 * MMD 0, as some 10G PHYs have zero Devices In package, 734 * e.g. Cortina CS4315/CS4340 PHY. 735 */ 736 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, &devs_in_pkg); 737 if (phy_reg < 0) 738 return -EIO; 739 740 /* no device there, let's get out of here */ 741 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) 742 return -ENODEV; 743 } 744 745 /* Now probe Device Identifiers for each device present. */ 746 for (i = 1; i < num_ids; i++) { 747 if (!(devs_in_pkg & (1 << i))) 748 continue; 749 750 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) { 751 /* Probe the "Device Present" bits for the vendor MMDs 752 * to ignore these if they do not contain IEEE 802.3 753 * registers. 754 */ 755 ret = phy_c45_probe_present(bus, addr, i); 756 if (ret < 0) 757 return ret; 758 759 if (!ret) 760 continue; 761 } 762 763 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID1); 764 if (phy_reg < 0) 765 return -EIO; 766 c45_ids->device_ids[i] = phy_reg << 16; 767 768 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID2); 769 if (phy_reg < 0) 770 return -EIO; 771 c45_ids->device_ids[i] |= phy_reg; 772 } 773 774 c45_ids->devices_in_package = devs_in_pkg; 775 /* Bit 0 doesn't represent a device, it indicates c22 regs presence */ 776 c45_ids->mmds_present = devs_in_pkg & ~BIT(0); 777 778 return 0; 779 } 780 781 /** 782 * get_phy_c22_id - reads the specified addr for its clause 22 ID. 783 * @bus: the target MII bus 784 * @addr: PHY address on the MII bus 785 * @phy_id: where to store the ID retrieved. 786 * 787 * Read the 802.3 clause 22 PHY ID from the PHY at @addr on the @bus, 788 * placing it in @phy_id. Return zero on successful read and the ID is 789 * valid, %-EIO on bus access error, or %-ENODEV if no device responds 790 * or invalid ID. 791 */ 792 static int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id) 793 { 794 int phy_reg; 795 796 /* Grab the bits from PHYIR1, and put them in the upper half */ 797 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); 798 if (phy_reg < 0) { 799 /* returning -ENODEV doesn't stop bus scanning */ 800 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO; 801 } 802 803 *phy_id = phy_reg << 16; 804 805 /* Grab the bits from PHYIR2, and put them in the lower half */ 806 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); 807 if (phy_reg < 0) { 808 /* returning -ENODEV doesn't stop bus scanning */ 809 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO; 810 } 811 812 *phy_id |= phy_reg; 813 814 /* If the phy_id is mostly Fs, there is no device there */ 815 if ((*phy_id & 0x1fffffff) == 0x1fffffff) 816 return -ENODEV; 817 818 return 0; 819 } 820 821 /** 822 * get_phy_device - reads the specified PHY device and returns its @phy_device 823 * struct 824 * @bus: the target MII bus 825 * @addr: PHY address on the MII bus 826 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol 827 * 828 * Probe for a PHY at @addr on @bus. 829 * 830 * When probing for a clause 22 PHY, then read the ID registers. If we find 831 * a valid ID, allocate and return a &struct phy_device. 832 * 833 * When probing for a clause 45 PHY, read the "devices in package" registers. 834 * If the "devices in package" appears valid, read the ID registers for each 835 * MMD, allocate and return a &struct phy_device. 836 * 837 * Returns an allocated &struct phy_device on success, %-ENODEV if there is 838 * no PHY present, or %-EIO on bus access error. 839 */ 840 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) 841 { 842 struct phy_c45_device_ids c45_ids; 843 u32 phy_id = 0; 844 int r; 845 846 c45_ids.devices_in_package = 0; 847 c45_ids.mmds_present = 0; 848 memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids)); 849 850 if (is_c45) 851 r = get_phy_c45_ids(bus, addr, &c45_ids); 852 else 853 r = get_phy_c22_id(bus, addr, &phy_id); 854 855 if (r) 856 return ERR_PTR(r); 857 858 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); 859 } 860 EXPORT_SYMBOL(get_phy_device); 861 862 /** 863 * phy_device_register - Register the phy device on the MDIO bus 864 * @phydev: phy_device structure to be added to the MDIO bus 865 */ 866 int phy_device_register(struct phy_device *phydev) 867 { 868 int err; 869 870 err = mdiobus_register_device(&phydev->mdio); 871 if (err) 872 return err; 873 874 /* Deassert the reset signal */ 875 phy_device_reset(phydev, 0); 876 877 /* Run all of the fixups for this PHY */ 878 err = phy_scan_fixups(phydev); 879 if (err) { 880 phydev_err(phydev, "failed to initialize\n"); 881 goto out; 882 } 883 884 err = device_add(&phydev->mdio.dev); 885 if (err) { 886 phydev_err(phydev, "failed to add\n"); 887 goto out; 888 } 889 890 return 0; 891 892 out: 893 /* Assert the reset signal */ 894 phy_device_reset(phydev, 1); 895 896 mdiobus_unregister_device(&phydev->mdio); 897 return err; 898 } 899 EXPORT_SYMBOL(phy_device_register); 900 901 /** 902 * phy_device_remove - Remove a previously registered phy device from the MDIO bus 903 * @phydev: phy_device structure to remove 904 * 905 * This doesn't free the phy_device itself, it merely reverses the effects 906 * of phy_device_register(). Use phy_device_free() to free the device 907 * after calling this function. 908 */ 909 void phy_device_remove(struct phy_device *phydev) 910 { 911 if (phydev->mii_ts) 912 unregister_mii_timestamper(phydev->mii_ts); 913 914 device_del(&phydev->mdio.dev); 915 916 /* Assert the reset signal */ 917 phy_device_reset(phydev, 1); 918 919 mdiobus_unregister_device(&phydev->mdio); 920 } 921 EXPORT_SYMBOL(phy_device_remove); 922 923 /** 924 * phy_find_first - finds the first PHY device on the bus 925 * @bus: the target MII bus 926 */ 927 struct phy_device *phy_find_first(struct mii_bus *bus) 928 { 929 struct phy_device *phydev; 930 int addr; 931 932 for (addr = 0; addr < PHY_MAX_ADDR; addr++) { 933 phydev = mdiobus_get_phy(bus, addr); 934 if (phydev) 935 return phydev; 936 } 937 return NULL; 938 } 939 EXPORT_SYMBOL(phy_find_first); 940 941 static void phy_link_change(struct phy_device *phydev, bool up) 942 { 943 struct net_device *netdev = phydev->attached_dev; 944 945 if (up) 946 netif_carrier_on(netdev); 947 else 948 netif_carrier_off(netdev); 949 phydev->adjust_link(netdev); 950 if (phydev->mii_ts && phydev->mii_ts->link_state) 951 phydev->mii_ts->link_state(phydev->mii_ts, phydev); 952 } 953 954 /** 955 * phy_prepare_link - prepares the PHY layer to monitor link status 956 * @phydev: target phy_device struct 957 * @handler: callback function for link status change notifications 958 * 959 * Description: Tells the PHY infrastructure to handle the 960 * gory details on monitoring link status (whether through 961 * polling or an interrupt), and to call back to the 962 * connected device driver when the link status changes. 963 * If you want to monitor your own link state, don't call 964 * this function. 965 */ 966 static void phy_prepare_link(struct phy_device *phydev, 967 void (*handler)(struct net_device *)) 968 { 969 phydev->adjust_link = handler; 970 } 971 972 /** 973 * phy_connect_direct - connect an ethernet device to a specific phy_device 974 * @dev: the network device to connect 975 * @phydev: the pointer to the phy device 976 * @handler: callback function for state change notifications 977 * @interface: PHY device's interface 978 */ 979 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, 980 void (*handler)(struct net_device *), 981 phy_interface_t interface) 982 { 983 int rc; 984 985 if (!dev) 986 return -EINVAL; 987 988 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); 989 if (rc) 990 return rc; 991 992 phy_prepare_link(phydev, handler); 993 if (phy_interrupt_is_valid(phydev)) 994 phy_request_interrupt(phydev); 995 996 return 0; 997 } 998 EXPORT_SYMBOL(phy_connect_direct); 999 1000 /** 1001 * phy_connect - connect an ethernet device to a PHY device 1002 * @dev: the network device to connect 1003 * @bus_id: the id string of the PHY device to connect 1004 * @handler: callback function for state change notifications 1005 * @interface: PHY device's interface 1006 * 1007 * Description: Convenience function for connecting ethernet 1008 * devices to PHY devices. The default behavior is for 1009 * the PHY infrastructure to handle everything, and only notify 1010 * the connected driver when the link status changes. If you 1011 * don't want, or can't use the provided functionality, you may 1012 * choose to call only the subset of functions which provide 1013 * the desired functionality. 1014 */ 1015 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, 1016 void (*handler)(struct net_device *), 1017 phy_interface_t interface) 1018 { 1019 struct phy_device *phydev; 1020 struct device *d; 1021 int rc; 1022 1023 /* Search the list of PHY devices on the mdio bus for the 1024 * PHY with the requested name 1025 */ 1026 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); 1027 if (!d) { 1028 pr_err("PHY %s not found\n", bus_id); 1029 return ERR_PTR(-ENODEV); 1030 } 1031 phydev = to_phy_device(d); 1032 1033 rc = phy_connect_direct(dev, phydev, handler, interface); 1034 put_device(d); 1035 if (rc) 1036 return ERR_PTR(rc); 1037 1038 return phydev; 1039 } 1040 EXPORT_SYMBOL(phy_connect); 1041 1042 /** 1043 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY 1044 * device 1045 * @phydev: target phy_device struct 1046 */ 1047 void phy_disconnect(struct phy_device *phydev) 1048 { 1049 if (phy_is_started(phydev)) 1050 phy_stop(phydev); 1051 1052 if (phy_interrupt_is_valid(phydev)) 1053 phy_free_interrupt(phydev); 1054 1055 phydev->adjust_link = NULL; 1056 1057 phy_detach(phydev); 1058 } 1059 EXPORT_SYMBOL(phy_disconnect); 1060 1061 /** 1062 * phy_poll_reset - Safely wait until a PHY reset has properly completed 1063 * @phydev: The PHY device to poll 1064 * 1065 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as 1066 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR 1067 * register must be polled until the BMCR_RESET bit clears. 1068 * 1069 * Furthermore, any attempts to write to PHY registers may have no effect 1070 * or even generate MDIO bus errors until this is complete. 1071 * 1072 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the 1073 * standard and do not fully reset after the BMCR_RESET bit is set, and may 1074 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an 1075 * effort to support such broken PHYs, this function is separate from the 1076 * standard phy_init_hw() which will zero all the other bits in the BMCR 1077 * and reapply all driver-specific and board-specific fixups. 1078 */ 1079 static int phy_poll_reset(struct phy_device *phydev) 1080 { 1081 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ 1082 int ret, val; 1083 1084 ret = phy_read_poll_timeout(phydev, MII_BMCR, val, !(val & BMCR_RESET), 1085 50000, 600000, true); 1086 if (ret) 1087 return ret; 1088 /* Some chips (smsc911x) may still need up to another 1ms after the 1089 * BMCR_RESET bit is cleared before they are usable. 1090 */ 1091 msleep(1); 1092 return 0; 1093 } 1094 1095 int phy_init_hw(struct phy_device *phydev) 1096 { 1097 int ret = 0; 1098 1099 /* Deassert the reset signal */ 1100 phy_device_reset(phydev, 0); 1101 1102 if (!phydev->drv) 1103 return 0; 1104 1105 if (phydev->drv->soft_reset) { 1106 ret = phydev->drv->soft_reset(phydev); 1107 /* see comment in genphy_soft_reset for an explanation */ 1108 if (!ret) 1109 phydev->suspended = 0; 1110 } 1111 1112 if (ret < 0) 1113 return ret; 1114 1115 ret = phy_scan_fixups(phydev); 1116 if (ret < 0) 1117 return ret; 1118 1119 if (phydev->drv->config_init) { 1120 ret = phydev->drv->config_init(phydev); 1121 if (ret < 0) 1122 return ret; 1123 } 1124 1125 if (phydev->drv->config_intr) { 1126 ret = phydev->drv->config_intr(phydev); 1127 if (ret < 0) 1128 return ret; 1129 } 1130 1131 return 0; 1132 } 1133 EXPORT_SYMBOL(phy_init_hw); 1134 1135 void phy_attached_info(struct phy_device *phydev) 1136 { 1137 phy_attached_print(phydev, NULL); 1138 } 1139 EXPORT_SYMBOL(phy_attached_info); 1140 1141 #define ATTACHED_FMT "attached PHY driver %s(mii_bus:phy_addr=%s, irq=%s)" 1142 char *phy_attached_info_irq(struct phy_device *phydev) 1143 { 1144 char *irq_str; 1145 char irq_num[8]; 1146 1147 switch(phydev->irq) { 1148 case PHY_POLL: 1149 irq_str = "POLL"; 1150 break; 1151 case PHY_MAC_INTERRUPT: 1152 irq_str = "MAC"; 1153 break; 1154 default: 1155 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq); 1156 irq_str = irq_num; 1157 break; 1158 } 1159 1160 return kasprintf(GFP_KERNEL, "%s", irq_str); 1161 } 1162 EXPORT_SYMBOL(phy_attached_info_irq); 1163 1164 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...) 1165 { 1166 const char *unbound = phydev->drv ? "" : "[unbound] "; 1167 char *irq_str = phy_attached_info_irq(phydev); 1168 1169 if (!fmt) { 1170 phydev_info(phydev, ATTACHED_FMT "\n", unbound, 1171 phydev_name(phydev), irq_str); 1172 } else { 1173 va_list ap; 1174 1175 phydev_info(phydev, ATTACHED_FMT, unbound, 1176 phydev_name(phydev), irq_str); 1177 1178 va_start(ap, fmt); 1179 vprintk(fmt, ap); 1180 va_end(ap); 1181 } 1182 kfree(irq_str); 1183 } 1184 EXPORT_SYMBOL(phy_attached_print); 1185 1186 static void phy_sysfs_create_links(struct phy_device *phydev) 1187 { 1188 struct net_device *dev = phydev->attached_dev; 1189 int err; 1190 1191 if (!dev) 1192 return; 1193 1194 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj, 1195 "attached_dev"); 1196 if (err) 1197 return; 1198 1199 err = sysfs_create_link_nowarn(&dev->dev.kobj, 1200 &phydev->mdio.dev.kobj, 1201 "phydev"); 1202 if (err) { 1203 dev_err(&dev->dev, "could not add device link to %s err %d\n", 1204 kobject_name(&phydev->mdio.dev.kobj), 1205 err); 1206 /* non-fatal - some net drivers can use one netdevice 1207 * with more then one phy 1208 */ 1209 } 1210 1211 phydev->sysfs_links = true; 1212 } 1213 1214 static ssize_t 1215 phy_standalone_show(struct device *dev, struct device_attribute *attr, 1216 char *buf) 1217 { 1218 struct phy_device *phydev = to_phy_device(dev); 1219 1220 return sprintf(buf, "%d\n", !phydev->attached_dev); 1221 } 1222 static DEVICE_ATTR_RO(phy_standalone); 1223 1224 /** 1225 * phy_sfp_attach - attach the SFP bus to the PHY upstream network device 1226 * @upstream: pointer to the phy device 1227 * @bus: sfp bus representing cage being attached 1228 * 1229 * This is used to fill in the sfp_upstream_ops .attach member. 1230 */ 1231 void phy_sfp_attach(void *upstream, struct sfp_bus *bus) 1232 { 1233 struct phy_device *phydev = upstream; 1234 1235 if (phydev->attached_dev) 1236 phydev->attached_dev->sfp_bus = bus; 1237 phydev->sfp_bus_attached = true; 1238 } 1239 EXPORT_SYMBOL(phy_sfp_attach); 1240 1241 /** 1242 * phy_sfp_detach - detach the SFP bus from the PHY upstream network device 1243 * @upstream: pointer to the phy device 1244 * @bus: sfp bus representing cage being attached 1245 * 1246 * This is used to fill in the sfp_upstream_ops .detach member. 1247 */ 1248 void phy_sfp_detach(void *upstream, struct sfp_bus *bus) 1249 { 1250 struct phy_device *phydev = upstream; 1251 1252 if (phydev->attached_dev) 1253 phydev->attached_dev->sfp_bus = NULL; 1254 phydev->sfp_bus_attached = false; 1255 } 1256 EXPORT_SYMBOL(phy_sfp_detach); 1257 1258 /** 1259 * phy_sfp_probe - probe for a SFP cage attached to this PHY device 1260 * @phydev: Pointer to phy_device 1261 * @ops: SFP's upstream operations 1262 */ 1263 int phy_sfp_probe(struct phy_device *phydev, 1264 const struct sfp_upstream_ops *ops) 1265 { 1266 struct sfp_bus *bus; 1267 int ret = 0; 1268 1269 if (phydev->mdio.dev.fwnode) { 1270 bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode); 1271 if (IS_ERR(bus)) 1272 return PTR_ERR(bus); 1273 1274 phydev->sfp_bus = bus; 1275 1276 ret = sfp_bus_add_upstream(bus, phydev, ops); 1277 sfp_bus_put(bus); 1278 } 1279 return ret; 1280 } 1281 EXPORT_SYMBOL(phy_sfp_probe); 1282 1283 /** 1284 * phy_attach_direct - attach a network device to a given PHY device pointer 1285 * @dev: network device to attach 1286 * @phydev: Pointer to phy_device to attach 1287 * @flags: PHY device's dev_flags 1288 * @interface: PHY device's interface 1289 * 1290 * Description: Called by drivers to attach to a particular PHY 1291 * device. The phy_device is found, and properly hooked up 1292 * to the phy_driver. If no driver is attached, then a 1293 * generic driver is used. The phy_device is given a ptr to 1294 * the attaching device, and given a callback for link status 1295 * change. The phy_device is returned to the attaching driver. 1296 * This function takes a reference on the phy device. 1297 */ 1298 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, 1299 u32 flags, phy_interface_t interface) 1300 { 1301 struct mii_bus *bus = phydev->mdio.bus; 1302 struct device *d = &phydev->mdio.dev; 1303 struct module *ndev_owner = NULL; 1304 bool using_genphy = false; 1305 int err; 1306 1307 /* For Ethernet device drivers that register their own MDIO bus, we 1308 * will have bus->owner match ndev_mod, so we do not want to increment 1309 * our own module->refcnt here, otherwise we would not be able to 1310 * unload later on. 1311 */ 1312 if (dev) 1313 ndev_owner = dev->dev.parent->driver->owner; 1314 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) { 1315 phydev_err(phydev, "failed to get the bus module\n"); 1316 return -EIO; 1317 } 1318 1319 get_device(d); 1320 1321 /* Assume that if there is no driver, that it doesn't 1322 * exist, and we should use the genphy driver. 1323 */ 1324 if (!d->driver) { 1325 if (phydev->is_c45) 1326 d->driver = &genphy_c45_driver.mdiodrv.driver; 1327 else 1328 d->driver = &genphy_driver.mdiodrv.driver; 1329 1330 using_genphy = true; 1331 } 1332 1333 if (!try_module_get(d->driver->owner)) { 1334 phydev_err(phydev, "failed to get the device driver module\n"); 1335 err = -EIO; 1336 goto error_put_device; 1337 } 1338 1339 if (using_genphy) { 1340 err = d->driver->probe(d); 1341 if (err >= 0) 1342 err = device_bind_driver(d); 1343 1344 if (err) 1345 goto error_module_put; 1346 } 1347 1348 if (phydev->attached_dev) { 1349 dev_err(&dev->dev, "PHY already attached\n"); 1350 err = -EBUSY; 1351 goto error; 1352 } 1353 1354 phydev->phy_link_change = phy_link_change; 1355 if (dev) { 1356 phydev->attached_dev = dev; 1357 dev->phydev = phydev; 1358 1359 if (phydev->sfp_bus_attached) 1360 dev->sfp_bus = phydev->sfp_bus; 1361 else if (dev->sfp_bus) 1362 phydev->is_on_sfp_module = true; 1363 } 1364 1365 /* Some Ethernet drivers try to connect to a PHY device before 1366 * calling register_netdevice() -> netdev_register_kobject() and 1367 * does the dev->dev.kobj initialization. Here we only check for 1368 * success which indicates that the network device kobject is 1369 * ready. Once we do that we still need to keep track of whether 1370 * links were successfully set up or not for phy_detach() to 1371 * remove them accordingly. 1372 */ 1373 phydev->sysfs_links = false; 1374 1375 phy_sysfs_create_links(phydev); 1376 1377 if (!phydev->attached_dev) { 1378 err = sysfs_create_file(&phydev->mdio.dev.kobj, 1379 &dev_attr_phy_standalone.attr); 1380 if (err) 1381 phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n"); 1382 } 1383 1384 phydev->dev_flags |= flags; 1385 1386 phydev->interface = interface; 1387 1388 phydev->state = PHY_READY; 1389 1390 /* Port is set to PORT_TP by default and the actual PHY driver will set 1391 * it to different value depending on the PHY configuration. If we have 1392 * the generic PHY driver we can't figure it out, thus set the old 1393 * legacy PORT_MII value. 1394 */ 1395 if (using_genphy) 1396 phydev->port = PORT_MII; 1397 1398 /* Initial carrier state is off as the phy is about to be 1399 * (re)initialized. 1400 */ 1401 if (dev) 1402 netif_carrier_off(phydev->attached_dev); 1403 1404 /* Do initial configuration here, now that 1405 * we have certain key parameters 1406 * (dev_flags and interface) 1407 */ 1408 err = phy_init_hw(phydev); 1409 if (err) 1410 goto error; 1411 1412 err = phy_disable_interrupts(phydev); 1413 if (err) 1414 return err; 1415 1416 phy_resume(phydev); 1417 phy_led_triggers_register(phydev); 1418 1419 return err; 1420 1421 error: 1422 /* phy_detach() does all of the cleanup below */ 1423 phy_detach(phydev); 1424 return err; 1425 1426 error_module_put: 1427 module_put(d->driver->owner); 1428 error_put_device: 1429 put_device(d); 1430 if (ndev_owner != bus->owner) 1431 module_put(bus->owner); 1432 return err; 1433 } 1434 EXPORT_SYMBOL(phy_attach_direct); 1435 1436 /** 1437 * phy_attach - attach a network device to a particular PHY device 1438 * @dev: network device to attach 1439 * @bus_id: Bus ID of PHY device to attach 1440 * @interface: PHY device's interface 1441 * 1442 * Description: Same as phy_attach_direct() except that a PHY bus_id 1443 * string is passed instead of a pointer to a struct phy_device. 1444 */ 1445 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, 1446 phy_interface_t interface) 1447 { 1448 struct bus_type *bus = &mdio_bus_type; 1449 struct phy_device *phydev; 1450 struct device *d; 1451 int rc; 1452 1453 if (!dev) 1454 return ERR_PTR(-EINVAL); 1455 1456 /* Search the list of PHY devices on the mdio bus for the 1457 * PHY with the requested name 1458 */ 1459 d = bus_find_device_by_name(bus, NULL, bus_id); 1460 if (!d) { 1461 pr_err("PHY %s not found\n", bus_id); 1462 return ERR_PTR(-ENODEV); 1463 } 1464 phydev = to_phy_device(d); 1465 1466 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); 1467 put_device(d); 1468 if (rc) 1469 return ERR_PTR(rc); 1470 1471 return phydev; 1472 } 1473 EXPORT_SYMBOL(phy_attach); 1474 1475 static bool phy_driver_is_genphy_kind(struct phy_device *phydev, 1476 struct device_driver *driver) 1477 { 1478 struct device *d = &phydev->mdio.dev; 1479 bool ret = false; 1480 1481 if (!phydev->drv) 1482 return ret; 1483 1484 get_device(d); 1485 ret = d->driver == driver; 1486 put_device(d); 1487 1488 return ret; 1489 } 1490 1491 bool phy_driver_is_genphy(struct phy_device *phydev) 1492 { 1493 return phy_driver_is_genphy_kind(phydev, 1494 &genphy_driver.mdiodrv.driver); 1495 } 1496 EXPORT_SYMBOL_GPL(phy_driver_is_genphy); 1497 1498 bool phy_driver_is_genphy_10g(struct phy_device *phydev) 1499 { 1500 return phy_driver_is_genphy_kind(phydev, 1501 &genphy_c45_driver.mdiodrv.driver); 1502 } 1503 EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g); 1504 1505 /** 1506 * phy_package_join - join a common PHY group 1507 * @phydev: target phy_device struct 1508 * @addr: cookie and PHY address for global register access 1509 * @priv_size: if non-zero allocate this amount of bytes for private data 1510 * 1511 * This joins a PHY group and provides a shared storage for all phydevs in 1512 * this group. This is intended to be used for packages which contain 1513 * more than one PHY, for example a quad PHY transceiver. 1514 * 1515 * The addr parameter serves as a cookie which has to have the same value 1516 * for all members of one group and as a PHY address to access generic 1517 * registers of a PHY package. Usually, one of the PHY addresses of the 1518 * different PHYs in the package provides access to these global registers. 1519 * The address which is given here, will be used in the phy_package_read() 1520 * and phy_package_write() convenience functions. If your PHY doesn't have 1521 * global registers you can just pick any of the PHY addresses. 1522 * 1523 * This will set the shared pointer of the phydev to the shared storage. 1524 * If this is the first call for a this cookie the shared storage will be 1525 * allocated. If priv_size is non-zero, the given amount of bytes are 1526 * allocated for the priv member. 1527 * 1528 * Returns < 1 on error, 0 on success. Esp. calling phy_package_join() 1529 * with the same cookie but a different priv_size is an error. 1530 */ 1531 int phy_package_join(struct phy_device *phydev, int addr, size_t priv_size) 1532 { 1533 struct mii_bus *bus = phydev->mdio.bus; 1534 struct phy_package_shared *shared; 1535 int ret; 1536 1537 if (addr < 0 || addr >= PHY_MAX_ADDR) 1538 return -EINVAL; 1539 1540 mutex_lock(&bus->shared_lock); 1541 shared = bus->shared[addr]; 1542 if (!shared) { 1543 ret = -ENOMEM; 1544 shared = kzalloc(sizeof(*shared), GFP_KERNEL); 1545 if (!shared) 1546 goto err_unlock; 1547 if (priv_size) { 1548 shared->priv = kzalloc(priv_size, GFP_KERNEL); 1549 if (!shared->priv) 1550 goto err_free; 1551 shared->priv_size = priv_size; 1552 } 1553 shared->addr = addr; 1554 refcount_set(&shared->refcnt, 1); 1555 bus->shared[addr] = shared; 1556 } else { 1557 ret = -EINVAL; 1558 if (priv_size && priv_size != shared->priv_size) 1559 goto err_unlock; 1560 refcount_inc(&shared->refcnt); 1561 } 1562 mutex_unlock(&bus->shared_lock); 1563 1564 phydev->shared = shared; 1565 1566 return 0; 1567 1568 err_free: 1569 kfree(shared); 1570 err_unlock: 1571 mutex_unlock(&bus->shared_lock); 1572 return ret; 1573 } 1574 EXPORT_SYMBOL_GPL(phy_package_join); 1575 1576 /** 1577 * phy_package_leave - leave a common PHY group 1578 * @phydev: target phy_device struct 1579 * 1580 * This leaves a PHY group created by phy_package_join(). If this phydev 1581 * was the last user of the shared data between the group, this data is 1582 * freed. Resets the phydev->shared pointer to NULL. 1583 */ 1584 void phy_package_leave(struct phy_device *phydev) 1585 { 1586 struct phy_package_shared *shared = phydev->shared; 1587 struct mii_bus *bus = phydev->mdio.bus; 1588 1589 if (!shared) 1590 return; 1591 1592 if (refcount_dec_and_mutex_lock(&shared->refcnt, &bus->shared_lock)) { 1593 bus->shared[shared->addr] = NULL; 1594 mutex_unlock(&bus->shared_lock); 1595 kfree(shared->priv); 1596 kfree(shared); 1597 } 1598 1599 phydev->shared = NULL; 1600 } 1601 EXPORT_SYMBOL_GPL(phy_package_leave); 1602 1603 static void devm_phy_package_leave(struct device *dev, void *res) 1604 { 1605 phy_package_leave(*(struct phy_device **)res); 1606 } 1607 1608 /** 1609 * devm_phy_package_join - resource managed phy_package_join() 1610 * @dev: device that is registering this PHY package 1611 * @phydev: target phy_device struct 1612 * @addr: cookie and PHY address for global register access 1613 * @priv_size: if non-zero allocate this amount of bytes for private data 1614 * 1615 * Managed phy_package_join(). Shared storage fetched by this function, 1616 * phy_package_leave() is automatically called on driver detach. See 1617 * phy_package_join() for more information. 1618 */ 1619 int devm_phy_package_join(struct device *dev, struct phy_device *phydev, 1620 int addr, size_t priv_size) 1621 { 1622 struct phy_device **ptr; 1623 int ret; 1624 1625 ptr = devres_alloc(devm_phy_package_leave, sizeof(*ptr), 1626 GFP_KERNEL); 1627 if (!ptr) 1628 return -ENOMEM; 1629 1630 ret = phy_package_join(phydev, addr, priv_size); 1631 1632 if (!ret) { 1633 *ptr = phydev; 1634 devres_add(dev, ptr); 1635 } else { 1636 devres_free(ptr); 1637 } 1638 1639 return ret; 1640 } 1641 EXPORT_SYMBOL_GPL(devm_phy_package_join); 1642 1643 /** 1644 * phy_detach - detach a PHY device from its network device 1645 * @phydev: target phy_device struct 1646 * 1647 * This detaches the phy device from its network device and the phy 1648 * driver, and drops the reference count taken in phy_attach_direct(). 1649 */ 1650 void phy_detach(struct phy_device *phydev) 1651 { 1652 struct net_device *dev = phydev->attached_dev; 1653 struct module *ndev_owner = NULL; 1654 struct mii_bus *bus; 1655 1656 if (phydev->sysfs_links) { 1657 if (dev) 1658 sysfs_remove_link(&dev->dev.kobj, "phydev"); 1659 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev"); 1660 } 1661 1662 if (!phydev->attached_dev) 1663 sysfs_remove_file(&phydev->mdio.dev.kobj, 1664 &dev_attr_phy_standalone.attr); 1665 1666 phy_suspend(phydev); 1667 if (dev) { 1668 phydev->attached_dev->phydev = NULL; 1669 phydev->attached_dev = NULL; 1670 } 1671 phydev->phylink = NULL; 1672 1673 phy_led_triggers_unregister(phydev); 1674 1675 if (phydev->mdio.dev.driver) 1676 module_put(phydev->mdio.dev.driver->owner); 1677 1678 /* If the device had no specific driver before (i.e. - it 1679 * was using the generic driver), we unbind the device 1680 * from the generic driver so that there's a chance a 1681 * real driver could be loaded 1682 */ 1683 if (phy_driver_is_genphy(phydev) || 1684 phy_driver_is_genphy_10g(phydev)) 1685 device_release_driver(&phydev->mdio.dev); 1686 1687 /* 1688 * The phydev might go away on the put_device() below, so avoid 1689 * a use-after-free bug by reading the underlying bus first. 1690 */ 1691 bus = phydev->mdio.bus; 1692 1693 put_device(&phydev->mdio.dev); 1694 if (dev) 1695 ndev_owner = dev->dev.parent->driver->owner; 1696 if (ndev_owner != bus->owner) 1697 module_put(bus->owner); 1698 1699 /* Assert the reset signal */ 1700 phy_device_reset(phydev, 1); 1701 } 1702 EXPORT_SYMBOL(phy_detach); 1703 1704 int phy_suspend(struct phy_device *phydev) 1705 { 1706 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; 1707 struct net_device *netdev = phydev->attached_dev; 1708 struct phy_driver *phydrv = phydev->drv; 1709 int ret; 1710 1711 if (phydev->suspended) 1712 return 0; 1713 1714 /* If the device has WOL enabled, we cannot suspend the PHY */ 1715 phy_ethtool_get_wol(phydev, &wol); 1716 if (wol.wolopts || (netdev && netdev->wol_enabled)) 1717 return -EBUSY; 1718 1719 if (!phydrv || !phydrv->suspend) 1720 return 0; 1721 1722 ret = phydrv->suspend(phydev); 1723 if (!ret) 1724 phydev->suspended = true; 1725 1726 return ret; 1727 } 1728 EXPORT_SYMBOL(phy_suspend); 1729 1730 int __phy_resume(struct phy_device *phydev) 1731 { 1732 struct phy_driver *phydrv = phydev->drv; 1733 int ret; 1734 1735 lockdep_assert_held(&phydev->lock); 1736 1737 if (!phydrv || !phydrv->resume) 1738 return 0; 1739 1740 ret = phydrv->resume(phydev); 1741 if (!ret) 1742 phydev->suspended = false; 1743 1744 return ret; 1745 } 1746 EXPORT_SYMBOL(__phy_resume); 1747 1748 int phy_resume(struct phy_device *phydev) 1749 { 1750 int ret; 1751 1752 mutex_lock(&phydev->lock); 1753 ret = __phy_resume(phydev); 1754 mutex_unlock(&phydev->lock); 1755 1756 return ret; 1757 } 1758 EXPORT_SYMBOL(phy_resume); 1759 1760 int phy_loopback(struct phy_device *phydev, bool enable) 1761 { 1762 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); 1763 int ret = 0; 1764 1765 mutex_lock(&phydev->lock); 1766 1767 if (enable && phydev->loopback_enabled) { 1768 ret = -EBUSY; 1769 goto out; 1770 } 1771 1772 if (!enable && !phydev->loopback_enabled) { 1773 ret = -EINVAL; 1774 goto out; 1775 } 1776 1777 if (phydev->drv && phydrv->set_loopback) 1778 ret = phydrv->set_loopback(phydev, enable); 1779 else 1780 ret = -EOPNOTSUPP; 1781 1782 if (ret) 1783 goto out; 1784 1785 phydev->loopback_enabled = enable; 1786 1787 out: 1788 mutex_unlock(&phydev->lock); 1789 return ret; 1790 } 1791 EXPORT_SYMBOL(phy_loopback); 1792 1793 /** 1794 * phy_reset_after_clk_enable - perform a PHY reset if needed 1795 * @phydev: target phy_device struct 1796 * 1797 * Description: Some PHYs are known to need a reset after their refclk was 1798 * enabled. This function evaluates the flags and perform the reset if it's 1799 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy 1800 * was reset. 1801 */ 1802 int phy_reset_after_clk_enable(struct phy_device *phydev) 1803 { 1804 if (!phydev || !phydev->drv) 1805 return -ENODEV; 1806 1807 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) { 1808 phy_device_reset(phydev, 1); 1809 phy_device_reset(phydev, 0); 1810 return 1; 1811 } 1812 1813 return 0; 1814 } 1815 EXPORT_SYMBOL(phy_reset_after_clk_enable); 1816 1817 /* Generic PHY support and helper functions */ 1818 1819 /** 1820 * genphy_config_advert - sanitize and advertise auto-negotiation parameters 1821 * @phydev: target phy_device struct 1822 * 1823 * Description: Writes MII_ADVERTISE with the appropriate values, 1824 * after sanitizing the values to make sure we only advertise 1825 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement 1826 * hasn't changed, and > 0 if it has changed. 1827 */ 1828 static int genphy_config_advert(struct phy_device *phydev) 1829 { 1830 int err, bmsr, changed = 0; 1831 u32 adv; 1832 1833 /* Only allow advertising what this PHY supports */ 1834 linkmode_and(phydev->advertising, phydev->advertising, 1835 phydev->supported); 1836 1837 adv = linkmode_adv_to_mii_adv_t(phydev->advertising); 1838 1839 /* Setup standard advertisement */ 1840 err = phy_modify_changed(phydev, MII_ADVERTISE, 1841 ADVERTISE_ALL | ADVERTISE_100BASE4 | 1842 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM, 1843 adv); 1844 if (err < 0) 1845 return err; 1846 if (err > 0) 1847 changed = 1; 1848 1849 bmsr = phy_read(phydev, MII_BMSR); 1850 if (bmsr < 0) 1851 return bmsr; 1852 1853 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all 1854 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a 1855 * logical 1. 1856 */ 1857 if (!(bmsr & BMSR_ESTATEN)) 1858 return changed; 1859 1860 adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising); 1861 1862 err = phy_modify_changed(phydev, MII_CTRL1000, 1863 ADVERTISE_1000FULL | ADVERTISE_1000HALF, 1864 adv); 1865 if (err < 0) 1866 return err; 1867 if (err > 0) 1868 changed = 1; 1869 1870 return changed; 1871 } 1872 1873 /** 1874 * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters 1875 * @phydev: target phy_device struct 1876 * 1877 * Description: Writes MII_ADVERTISE with the appropriate values, 1878 * after sanitizing the values to make sure we only advertise 1879 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement 1880 * hasn't changed, and > 0 if it has changed. This function is intended 1881 * for Clause 37 1000Base-X mode. 1882 */ 1883 static int genphy_c37_config_advert(struct phy_device *phydev) 1884 { 1885 u16 adv = 0; 1886 1887 /* Only allow advertising what this PHY supports */ 1888 linkmode_and(phydev->advertising, phydev->advertising, 1889 phydev->supported); 1890 1891 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 1892 phydev->advertising)) 1893 adv |= ADVERTISE_1000XFULL; 1894 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 1895 phydev->advertising)) 1896 adv |= ADVERTISE_1000XPAUSE; 1897 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 1898 phydev->advertising)) 1899 adv |= ADVERTISE_1000XPSE_ASYM; 1900 1901 return phy_modify_changed(phydev, MII_ADVERTISE, 1902 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE | 1903 ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM, 1904 adv); 1905 } 1906 1907 /** 1908 * genphy_config_eee_advert - disable unwanted eee mode advertisement 1909 * @phydev: target phy_device struct 1910 * 1911 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy 1912 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't 1913 * changed, and 1 if it has changed. 1914 */ 1915 int genphy_config_eee_advert(struct phy_device *phydev) 1916 { 1917 int err; 1918 1919 /* Nothing to disable */ 1920 if (!phydev->eee_broken_modes) 1921 return 0; 1922 1923 err = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, 1924 phydev->eee_broken_modes, 0); 1925 /* If the call failed, we assume that EEE is not supported */ 1926 return err < 0 ? 0 : err; 1927 } 1928 EXPORT_SYMBOL(genphy_config_eee_advert); 1929 1930 /** 1931 * genphy_setup_forced - configures/forces speed/duplex from @phydev 1932 * @phydev: target phy_device struct 1933 * 1934 * Description: Configures MII_BMCR to force speed/duplex 1935 * to the values in phydev. Assumes that the values are valid. 1936 * Please see phy_sanitize_settings(). 1937 */ 1938 int genphy_setup_forced(struct phy_device *phydev) 1939 { 1940 u16 ctl = 0; 1941 1942 phydev->pause = 0; 1943 phydev->asym_pause = 0; 1944 1945 if (SPEED_1000 == phydev->speed) 1946 ctl |= BMCR_SPEED1000; 1947 else if (SPEED_100 == phydev->speed) 1948 ctl |= BMCR_SPEED100; 1949 1950 if (DUPLEX_FULL == phydev->duplex) 1951 ctl |= BMCR_FULLDPLX; 1952 1953 return phy_modify(phydev, MII_BMCR, 1954 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl); 1955 } 1956 EXPORT_SYMBOL(genphy_setup_forced); 1957 1958 static int genphy_setup_master_slave(struct phy_device *phydev) 1959 { 1960 u16 ctl = 0; 1961 1962 if (!phydev->is_gigabit_capable) 1963 return 0; 1964 1965 switch (phydev->master_slave_set) { 1966 case MASTER_SLAVE_CFG_MASTER_PREFERRED: 1967 ctl |= CTL1000_PREFER_MASTER; 1968 break; 1969 case MASTER_SLAVE_CFG_SLAVE_PREFERRED: 1970 break; 1971 case MASTER_SLAVE_CFG_MASTER_FORCE: 1972 ctl |= CTL1000_AS_MASTER; 1973 fallthrough; 1974 case MASTER_SLAVE_CFG_SLAVE_FORCE: 1975 ctl |= CTL1000_ENABLE_MASTER; 1976 break; 1977 case MASTER_SLAVE_CFG_UNKNOWN: 1978 case MASTER_SLAVE_CFG_UNSUPPORTED: 1979 return 0; 1980 default: 1981 phydev_warn(phydev, "Unsupported Master/Slave mode\n"); 1982 return -EOPNOTSUPP; 1983 } 1984 1985 return phy_modify_changed(phydev, MII_CTRL1000, 1986 (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER | 1987 CTL1000_PREFER_MASTER), ctl); 1988 } 1989 1990 static int genphy_read_master_slave(struct phy_device *phydev) 1991 { 1992 int cfg, state; 1993 int val; 1994 1995 if (!phydev->is_gigabit_capable) { 1996 phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED; 1997 phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED; 1998 return 0; 1999 } 2000 2001 phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN; 2002 phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN; 2003 2004 val = phy_read(phydev, MII_CTRL1000); 2005 if (val < 0) 2006 return val; 2007 2008 if (val & CTL1000_ENABLE_MASTER) { 2009 if (val & CTL1000_AS_MASTER) 2010 cfg = MASTER_SLAVE_CFG_MASTER_FORCE; 2011 else 2012 cfg = MASTER_SLAVE_CFG_SLAVE_FORCE; 2013 } else { 2014 if (val & CTL1000_PREFER_MASTER) 2015 cfg = MASTER_SLAVE_CFG_MASTER_PREFERRED; 2016 else 2017 cfg = MASTER_SLAVE_CFG_SLAVE_PREFERRED; 2018 } 2019 2020 val = phy_read(phydev, MII_STAT1000); 2021 if (val < 0) 2022 return val; 2023 2024 if (val & LPA_1000MSFAIL) { 2025 state = MASTER_SLAVE_STATE_ERR; 2026 } else if (phydev->link) { 2027 /* this bits are valid only for active link */ 2028 if (val & LPA_1000MSRES) 2029 state = MASTER_SLAVE_STATE_MASTER; 2030 else 2031 state = MASTER_SLAVE_STATE_SLAVE; 2032 } else { 2033 state = MASTER_SLAVE_STATE_UNKNOWN; 2034 } 2035 2036 phydev->master_slave_get = cfg; 2037 phydev->master_slave_state = state; 2038 2039 return 0; 2040 } 2041 2042 /** 2043 * genphy_restart_aneg - Enable and Restart Autonegotiation 2044 * @phydev: target phy_device struct 2045 */ 2046 int genphy_restart_aneg(struct phy_device *phydev) 2047 { 2048 /* Don't isolate the PHY if we're negotiating */ 2049 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, 2050 BMCR_ANENABLE | BMCR_ANRESTART); 2051 } 2052 EXPORT_SYMBOL(genphy_restart_aneg); 2053 2054 /** 2055 * genphy_check_and_restart_aneg - Enable and restart auto-negotiation 2056 * @phydev: target phy_device struct 2057 * @restart: whether aneg restart is requested 2058 * 2059 * Check, and restart auto-negotiation if needed. 2060 */ 2061 int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart) 2062 { 2063 int ret; 2064 2065 if (!restart) { 2066 /* Advertisement hasn't changed, but maybe aneg was never on to 2067 * begin with? Or maybe phy was isolated? 2068 */ 2069 ret = phy_read(phydev, MII_BMCR); 2070 if (ret < 0) 2071 return ret; 2072 2073 if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE)) 2074 restart = true; 2075 } 2076 2077 if (restart) 2078 return genphy_restart_aneg(phydev); 2079 2080 return 0; 2081 } 2082 EXPORT_SYMBOL(genphy_check_and_restart_aneg); 2083 2084 /** 2085 * __genphy_config_aneg - restart auto-negotiation or write BMCR 2086 * @phydev: target phy_device struct 2087 * @changed: whether autoneg is requested 2088 * 2089 * Description: If auto-negotiation is enabled, we configure the 2090 * advertising, and then restart auto-negotiation. If it is not 2091 * enabled, then we write the BMCR. 2092 */ 2093 int __genphy_config_aneg(struct phy_device *phydev, bool changed) 2094 { 2095 int err; 2096 2097 if (genphy_config_eee_advert(phydev)) 2098 changed = true; 2099 2100 err = genphy_setup_master_slave(phydev); 2101 if (err < 0) 2102 return err; 2103 else if (err) 2104 changed = true; 2105 2106 if (AUTONEG_ENABLE != phydev->autoneg) 2107 return genphy_setup_forced(phydev); 2108 2109 err = genphy_config_advert(phydev); 2110 if (err < 0) /* error */ 2111 return err; 2112 else if (err) 2113 changed = true; 2114 2115 return genphy_check_and_restart_aneg(phydev, changed); 2116 } 2117 EXPORT_SYMBOL(__genphy_config_aneg); 2118 2119 /** 2120 * genphy_c37_config_aneg - restart auto-negotiation or write BMCR 2121 * @phydev: target phy_device struct 2122 * 2123 * Description: If auto-negotiation is enabled, we configure the 2124 * advertising, and then restart auto-negotiation. If it is not 2125 * enabled, then we write the BMCR. This function is intended 2126 * for use with Clause 37 1000Base-X mode. 2127 */ 2128 int genphy_c37_config_aneg(struct phy_device *phydev) 2129 { 2130 int err, changed; 2131 2132 if (phydev->autoneg != AUTONEG_ENABLE) 2133 return genphy_setup_forced(phydev); 2134 2135 err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100, 2136 BMCR_SPEED1000); 2137 if (err) 2138 return err; 2139 2140 changed = genphy_c37_config_advert(phydev); 2141 if (changed < 0) /* error */ 2142 return changed; 2143 2144 if (!changed) { 2145 /* Advertisement hasn't changed, but maybe aneg was never on to 2146 * begin with? Or maybe phy was isolated? 2147 */ 2148 int ctl = phy_read(phydev, MII_BMCR); 2149 2150 if (ctl < 0) 2151 return ctl; 2152 2153 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) 2154 changed = 1; /* do restart aneg */ 2155 } 2156 2157 /* Only restart aneg if we are advertising something different 2158 * than we were before. 2159 */ 2160 if (changed > 0) 2161 return genphy_restart_aneg(phydev); 2162 2163 return 0; 2164 } 2165 EXPORT_SYMBOL(genphy_c37_config_aneg); 2166 2167 /** 2168 * genphy_aneg_done - return auto-negotiation status 2169 * @phydev: target phy_device struct 2170 * 2171 * Description: Reads the status register and returns 0 either if 2172 * auto-negotiation is incomplete, or if there was an error. 2173 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. 2174 */ 2175 int genphy_aneg_done(struct phy_device *phydev) 2176 { 2177 int retval = phy_read(phydev, MII_BMSR); 2178 2179 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); 2180 } 2181 EXPORT_SYMBOL(genphy_aneg_done); 2182 2183 /** 2184 * genphy_update_link - update link status in @phydev 2185 * @phydev: target phy_device struct 2186 * 2187 * Description: Update the value in phydev->link to reflect the 2188 * current link value. In order to do this, we need to read 2189 * the status register twice, keeping the second value. 2190 */ 2191 int genphy_update_link(struct phy_device *phydev) 2192 { 2193 int status = 0, bmcr; 2194 2195 bmcr = phy_read(phydev, MII_BMCR); 2196 if (bmcr < 0) 2197 return bmcr; 2198 2199 /* Autoneg is being started, therefore disregard BMSR value and 2200 * report link as down. 2201 */ 2202 if (bmcr & BMCR_ANRESTART) 2203 goto done; 2204 2205 /* The link state is latched low so that momentary link 2206 * drops can be detected. Do not double-read the status 2207 * in polling mode to detect such short link drops except 2208 * the link was already down. 2209 */ 2210 if (!phy_polling_mode(phydev) || !phydev->link) { 2211 status = phy_read(phydev, MII_BMSR); 2212 if (status < 0) 2213 return status; 2214 else if (status & BMSR_LSTATUS) 2215 goto done; 2216 } 2217 2218 /* Read link and autonegotiation status */ 2219 status = phy_read(phydev, MII_BMSR); 2220 if (status < 0) 2221 return status; 2222 done: 2223 phydev->link = status & BMSR_LSTATUS ? 1 : 0; 2224 phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0; 2225 2226 /* Consider the case that autoneg was started and "aneg complete" 2227 * bit has been reset, but "link up" bit not yet. 2228 */ 2229 if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete) 2230 phydev->link = 0; 2231 2232 return 0; 2233 } 2234 EXPORT_SYMBOL(genphy_update_link); 2235 2236 int genphy_read_lpa(struct phy_device *phydev) 2237 { 2238 int lpa, lpagb; 2239 2240 if (phydev->autoneg == AUTONEG_ENABLE) { 2241 if (!phydev->autoneg_complete) { 2242 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, 2243 0); 2244 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0); 2245 return 0; 2246 } 2247 2248 if (phydev->is_gigabit_capable) { 2249 lpagb = phy_read(phydev, MII_STAT1000); 2250 if (lpagb < 0) 2251 return lpagb; 2252 2253 if (lpagb & LPA_1000MSFAIL) { 2254 int adv = phy_read(phydev, MII_CTRL1000); 2255 2256 if (adv < 0) 2257 return adv; 2258 2259 if (adv & CTL1000_ENABLE_MASTER) 2260 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n"); 2261 else 2262 phydev_err(phydev, "Master/Slave resolution failed\n"); 2263 return -ENOLINK; 2264 } 2265 2266 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, 2267 lpagb); 2268 } 2269 2270 lpa = phy_read(phydev, MII_LPA); 2271 if (lpa < 0) 2272 return lpa; 2273 2274 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa); 2275 } else { 2276 linkmode_zero(phydev->lp_advertising); 2277 } 2278 2279 return 0; 2280 } 2281 EXPORT_SYMBOL(genphy_read_lpa); 2282 2283 /** 2284 * genphy_read_status_fixed - read the link parameters for !aneg mode 2285 * @phydev: target phy_device struct 2286 * 2287 * Read the current duplex and speed state for a PHY operating with 2288 * autonegotiation disabled. 2289 */ 2290 int genphy_read_status_fixed(struct phy_device *phydev) 2291 { 2292 int bmcr = phy_read(phydev, MII_BMCR); 2293 2294 if (bmcr < 0) 2295 return bmcr; 2296 2297 if (bmcr & BMCR_FULLDPLX) 2298 phydev->duplex = DUPLEX_FULL; 2299 else 2300 phydev->duplex = DUPLEX_HALF; 2301 2302 if (bmcr & BMCR_SPEED1000) 2303 phydev->speed = SPEED_1000; 2304 else if (bmcr & BMCR_SPEED100) 2305 phydev->speed = SPEED_100; 2306 else 2307 phydev->speed = SPEED_10; 2308 2309 return 0; 2310 } 2311 EXPORT_SYMBOL(genphy_read_status_fixed); 2312 2313 /** 2314 * genphy_read_status - check the link status and update current link state 2315 * @phydev: target phy_device struct 2316 * 2317 * Description: Check the link, then figure out the current state 2318 * by comparing what we advertise with what the link partner 2319 * advertises. Start by checking the gigabit possibilities, 2320 * then move on to 10/100. 2321 */ 2322 int genphy_read_status(struct phy_device *phydev) 2323 { 2324 int err, old_link = phydev->link; 2325 2326 /* Update the link, but return if there was an error */ 2327 err = genphy_update_link(phydev); 2328 if (err) 2329 return err; 2330 2331 /* why bother the PHY if nothing can have changed */ 2332 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) 2333 return 0; 2334 2335 phydev->speed = SPEED_UNKNOWN; 2336 phydev->duplex = DUPLEX_UNKNOWN; 2337 phydev->pause = 0; 2338 phydev->asym_pause = 0; 2339 2340 err = genphy_read_master_slave(phydev); 2341 if (err < 0) 2342 return err; 2343 2344 err = genphy_read_lpa(phydev); 2345 if (err < 0) 2346 return err; 2347 2348 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { 2349 phy_resolve_aneg_linkmode(phydev); 2350 } else if (phydev->autoneg == AUTONEG_DISABLE) { 2351 err = genphy_read_status_fixed(phydev); 2352 if (err < 0) 2353 return err; 2354 } 2355 2356 return 0; 2357 } 2358 EXPORT_SYMBOL(genphy_read_status); 2359 2360 /** 2361 * genphy_c37_read_status - check the link status and update current link state 2362 * @phydev: target phy_device struct 2363 * 2364 * Description: Check the link, then figure out the current state 2365 * by comparing what we advertise with what the link partner 2366 * advertises. This function is for Clause 37 1000Base-X mode. 2367 */ 2368 int genphy_c37_read_status(struct phy_device *phydev) 2369 { 2370 int lpa, err, old_link = phydev->link; 2371 2372 /* Update the link, but return if there was an error */ 2373 err = genphy_update_link(phydev); 2374 if (err) 2375 return err; 2376 2377 /* why bother the PHY if nothing can have changed */ 2378 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) 2379 return 0; 2380 2381 phydev->duplex = DUPLEX_UNKNOWN; 2382 phydev->pause = 0; 2383 phydev->asym_pause = 0; 2384 2385 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { 2386 lpa = phy_read(phydev, MII_LPA); 2387 if (lpa < 0) 2388 return lpa; 2389 2390 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2391 phydev->lp_advertising, lpa & LPA_LPACK); 2392 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 2393 phydev->lp_advertising, lpa & LPA_1000XFULL); 2394 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2395 phydev->lp_advertising, lpa & LPA_1000XPAUSE); 2396 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2397 phydev->lp_advertising, 2398 lpa & LPA_1000XPAUSE_ASYM); 2399 2400 phy_resolve_aneg_linkmode(phydev); 2401 } else if (phydev->autoneg == AUTONEG_DISABLE) { 2402 int bmcr = phy_read(phydev, MII_BMCR); 2403 2404 if (bmcr < 0) 2405 return bmcr; 2406 2407 if (bmcr & BMCR_FULLDPLX) 2408 phydev->duplex = DUPLEX_FULL; 2409 else 2410 phydev->duplex = DUPLEX_HALF; 2411 } 2412 2413 return 0; 2414 } 2415 EXPORT_SYMBOL(genphy_c37_read_status); 2416 2417 /** 2418 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit 2419 * @phydev: target phy_device struct 2420 * 2421 * Description: Perform a software PHY reset using the standard 2422 * BMCR_RESET bit and poll for the reset bit to be cleared. 2423 * 2424 * Returns: 0 on success, < 0 on failure 2425 */ 2426 int genphy_soft_reset(struct phy_device *phydev) 2427 { 2428 u16 res = BMCR_RESET; 2429 int ret; 2430 2431 if (phydev->autoneg == AUTONEG_ENABLE) 2432 res |= BMCR_ANRESTART; 2433 2434 ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res); 2435 if (ret < 0) 2436 return ret; 2437 2438 /* Clause 22 states that setting bit BMCR_RESET sets control registers 2439 * to their default value. Therefore the POWER DOWN bit is supposed to 2440 * be cleared after soft reset. 2441 */ 2442 phydev->suspended = 0; 2443 2444 ret = phy_poll_reset(phydev); 2445 if (ret) 2446 return ret; 2447 2448 /* BMCR may be reset to defaults */ 2449 if (phydev->autoneg == AUTONEG_DISABLE) 2450 ret = genphy_setup_forced(phydev); 2451 2452 return ret; 2453 } 2454 EXPORT_SYMBOL(genphy_soft_reset); 2455 2456 irqreturn_t genphy_handle_interrupt_no_ack(struct phy_device *phydev) 2457 { 2458 /* It seems there are cases where the interrupts are handled by another 2459 * entity (ie an IRQ controller embedded inside the PHY) and do not 2460 * need any other interraction from phylib. In this case, just trigger 2461 * the state machine directly. 2462 */ 2463 phy_trigger_machine(phydev); 2464 2465 return 0; 2466 } 2467 EXPORT_SYMBOL(genphy_handle_interrupt_no_ack); 2468 2469 /** 2470 * genphy_read_abilities - read PHY abilities from Clause 22 registers 2471 * @phydev: target phy_device struct 2472 * 2473 * Description: Reads the PHY's abilities and populates 2474 * phydev->supported accordingly. 2475 * 2476 * Returns: 0 on success, < 0 on failure 2477 */ 2478 int genphy_read_abilities(struct phy_device *phydev) 2479 { 2480 int val; 2481 2482 linkmode_set_bit_array(phy_basic_ports_array, 2483 ARRAY_SIZE(phy_basic_ports_array), 2484 phydev->supported); 2485 2486 val = phy_read(phydev, MII_BMSR); 2487 if (val < 0) 2488 return val; 2489 2490 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported, 2491 val & BMSR_ANEGCAPABLE); 2492 2493 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported, 2494 val & BMSR_100FULL); 2495 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported, 2496 val & BMSR_100HALF); 2497 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported, 2498 val & BMSR_10FULL); 2499 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported, 2500 val & BMSR_10HALF); 2501 2502 if (val & BMSR_ESTATEN) { 2503 val = phy_read(phydev, MII_ESTATUS); 2504 if (val < 0) 2505 return val; 2506 2507 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 2508 phydev->supported, val & ESTATUS_1000_TFULL); 2509 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 2510 phydev->supported, val & ESTATUS_1000_THALF); 2511 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, 2512 phydev->supported, val & ESTATUS_1000_XFULL); 2513 } 2514 2515 return 0; 2516 } 2517 EXPORT_SYMBOL(genphy_read_abilities); 2518 2519 /* This is used for the phy device which doesn't support the MMD extended 2520 * register access, but it does have side effect when we are trying to access 2521 * the MMD register via indirect method. 2522 */ 2523 int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum) 2524 { 2525 return -EOPNOTSUPP; 2526 } 2527 EXPORT_SYMBOL(genphy_read_mmd_unsupported); 2528 2529 int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum, 2530 u16 regnum, u16 val) 2531 { 2532 return -EOPNOTSUPP; 2533 } 2534 EXPORT_SYMBOL(genphy_write_mmd_unsupported); 2535 2536 int genphy_suspend(struct phy_device *phydev) 2537 { 2538 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN); 2539 } 2540 EXPORT_SYMBOL(genphy_suspend); 2541 2542 int genphy_resume(struct phy_device *phydev) 2543 { 2544 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN); 2545 } 2546 EXPORT_SYMBOL(genphy_resume); 2547 2548 int genphy_loopback(struct phy_device *phydev, bool enable) 2549 { 2550 return phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 2551 enable ? BMCR_LOOPBACK : 0); 2552 } 2553 EXPORT_SYMBOL(genphy_loopback); 2554 2555 /** 2556 * phy_remove_link_mode - Remove a supported link mode 2557 * @phydev: phy_device structure to remove link mode from 2558 * @link_mode: Link mode to be removed 2559 * 2560 * Description: Some MACs don't support all link modes which the PHY 2561 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper 2562 * to remove a link mode. 2563 */ 2564 void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode) 2565 { 2566 linkmode_clear_bit(link_mode, phydev->supported); 2567 phy_advertise_supported(phydev); 2568 } 2569 EXPORT_SYMBOL(phy_remove_link_mode); 2570 2571 static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src) 2572 { 2573 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst, 2574 linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src)); 2575 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst, 2576 linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src)); 2577 } 2578 2579 /** 2580 * phy_advertise_supported - Advertise all supported modes 2581 * @phydev: target phy_device struct 2582 * 2583 * Description: Called to advertise all supported modes, doesn't touch 2584 * pause mode advertising. 2585 */ 2586 void phy_advertise_supported(struct phy_device *phydev) 2587 { 2588 __ETHTOOL_DECLARE_LINK_MODE_MASK(new); 2589 2590 linkmode_copy(new, phydev->supported); 2591 phy_copy_pause_bits(new, phydev->advertising); 2592 linkmode_copy(phydev->advertising, new); 2593 } 2594 EXPORT_SYMBOL(phy_advertise_supported); 2595 2596 /** 2597 * phy_support_sym_pause - Enable support of symmetrical pause 2598 * @phydev: target phy_device struct 2599 * 2600 * Description: Called by the MAC to indicate is supports symmetrical 2601 * Pause, but not asym pause. 2602 */ 2603 void phy_support_sym_pause(struct phy_device *phydev) 2604 { 2605 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported); 2606 phy_copy_pause_bits(phydev->advertising, phydev->supported); 2607 } 2608 EXPORT_SYMBOL(phy_support_sym_pause); 2609 2610 /** 2611 * phy_support_asym_pause - Enable support of asym pause 2612 * @phydev: target phy_device struct 2613 * 2614 * Description: Called by the MAC to indicate is supports Asym Pause. 2615 */ 2616 void phy_support_asym_pause(struct phy_device *phydev) 2617 { 2618 phy_copy_pause_bits(phydev->advertising, phydev->supported); 2619 } 2620 EXPORT_SYMBOL(phy_support_asym_pause); 2621 2622 /** 2623 * phy_set_sym_pause - Configure symmetric Pause 2624 * @phydev: target phy_device struct 2625 * @rx: Receiver Pause is supported 2626 * @tx: Transmit Pause is supported 2627 * @autoneg: Auto neg should be used 2628 * 2629 * Description: Configure advertised Pause support depending on if 2630 * receiver pause and pause auto neg is supported. Generally called 2631 * from the set_pauseparam .ndo. 2632 */ 2633 void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx, 2634 bool autoneg) 2635 { 2636 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported); 2637 2638 if (rx && tx && autoneg) 2639 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2640 phydev->supported); 2641 2642 linkmode_copy(phydev->advertising, phydev->supported); 2643 } 2644 EXPORT_SYMBOL(phy_set_sym_pause); 2645 2646 /** 2647 * phy_set_asym_pause - Configure Pause and Asym Pause 2648 * @phydev: target phy_device struct 2649 * @rx: Receiver Pause is supported 2650 * @tx: Transmit Pause is supported 2651 * 2652 * Description: Configure advertised Pause support depending on if 2653 * transmit and receiver pause is supported. If there has been a 2654 * change in adverting, trigger a new autoneg. Generally called from 2655 * the set_pauseparam .ndo. 2656 */ 2657 void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx) 2658 { 2659 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv); 2660 2661 linkmode_copy(oldadv, phydev->advertising); 2662 linkmode_set_pause(phydev->advertising, tx, rx); 2663 2664 if (!linkmode_equal(oldadv, phydev->advertising) && 2665 phydev->autoneg) 2666 phy_start_aneg(phydev); 2667 } 2668 EXPORT_SYMBOL(phy_set_asym_pause); 2669 2670 /** 2671 * phy_validate_pause - Test if the PHY/MAC support the pause configuration 2672 * @phydev: phy_device struct 2673 * @pp: requested pause configuration 2674 * 2675 * Description: Test if the PHY/MAC combination supports the Pause 2676 * configuration the user is requesting. Returns True if it is 2677 * supported, false otherwise. 2678 */ 2679 bool phy_validate_pause(struct phy_device *phydev, 2680 struct ethtool_pauseparam *pp) 2681 { 2682 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2683 phydev->supported) && pp->rx_pause) 2684 return false; 2685 2686 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2687 phydev->supported) && 2688 pp->rx_pause != pp->tx_pause) 2689 return false; 2690 2691 return true; 2692 } 2693 EXPORT_SYMBOL(phy_validate_pause); 2694 2695 /** 2696 * phy_get_pause - resolve negotiated pause modes 2697 * @phydev: phy_device struct 2698 * @tx_pause: pointer to bool to indicate whether transmit pause should be 2699 * enabled. 2700 * @rx_pause: pointer to bool to indicate whether receive pause should be 2701 * enabled. 2702 * 2703 * Resolve and return the flow control modes according to the negotiation 2704 * result. This includes checking that we are operating in full duplex mode. 2705 * See linkmode_resolve_pause() for further details. 2706 */ 2707 void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause) 2708 { 2709 if (phydev->duplex != DUPLEX_FULL) { 2710 *tx_pause = false; 2711 *rx_pause = false; 2712 return; 2713 } 2714 2715 return linkmode_resolve_pause(phydev->advertising, 2716 phydev->lp_advertising, 2717 tx_pause, rx_pause); 2718 } 2719 EXPORT_SYMBOL(phy_get_pause); 2720 2721 #if IS_ENABLED(CONFIG_OF_MDIO) 2722 static int phy_get_int_delay_property(struct device *dev, const char *name) 2723 { 2724 s32 int_delay; 2725 int ret; 2726 2727 ret = device_property_read_u32(dev, name, &int_delay); 2728 if (ret) 2729 return ret; 2730 2731 return int_delay; 2732 } 2733 #else 2734 static int phy_get_int_delay_property(struct device *dev, const char *name) 2735 { 2736 return -EINVAL; 2737 } 2738 #endif 2739 2740 /** 2741 * phy_get_internal_delay - returns the index of the internal delay 2742 * @phydev: phy_device struct 2743 * @dev: pointer to the devices device struct 2744 * @delay_values: array of delays the PHY supports 2745 * @size: the size of the delay array 2746 * @is_rx: boolean to indicate to get the rx internal delay 2747 * 2748 * Returns the index within the array of internal delay passed in. 2749 * If the device property is not present then the interface type is checked 2750 * if the interface defines use of internal delay then a 1 is returned otherwise 2751 * a 0 is returned. 2752 * The array must be in ascending order. If PHY does not have an ascending order 2753 * array then size = 0 and the value of the delay property is returned. 2754 * Return -EINVAL if the delay is invalid or cannot be found. 2755 */ 2756 s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev, 2757 const int *delay_values, int size, bool is_rx) 2758 { 2759 s32 delay; 2760 int i; 2761 2762 if (is_rx) { 2763 delay = phy_get_int_delay_property(dev, "rx-internal-delay-ps"); 2764 if (delay < 0 && size == 0) { 2765 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || 2766 phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) 2767 return 1; 2768 else 2769 return 0; 2770 } 2771 2772 } else { 2773 delay = phy_get_int_delay_property(dev, "tx-internal-delay-ps"); 2774 if (delay < 0 && size == 0) { 2775 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || 2776 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) 2777 return 1; 2778 else 2779 return 0; 2780 } 2781 } 2782 2783 if (delay < 0) 2784 return delay; 2785 2786 if (delay && size == 0) 2787 return delay; 2788 2789 if (delay < delay_values[0] || delay > delay_values[size - 1]) { 2790 phydev_err(phydev, "Delay %d is out of range\n", delay); 2791 return -EINVAL; 2792 } 2793 2794 if (delay == delay_values[0]) 2795 return 0; 2796 2797 for (i = 1; i < size; i++) { 2798 if (delay == delay_values[i]) 2799 return i; 2800 2801 /* Find an approximate index by looking up the table */ 2802 if (delay > delay_values[i - 1] && 2803 delay < delay_values[i]) { 2804 if (delay - delay_values[i - 1] < 2805 delay_values[i] - delay) 2806 return i - 1; 2807 else 2808 return i; 2809 } 2810 } 2811 2812 phydev_err(phydev, "error finding internal delay index for %d\n", 2813 delay); 2814 2815 return -EINVAL; 2816 } 2817 EXPORT_SYMBOL(phy_get_internal_delay); 2818 2819 static bool phy_drv_supports_irq(struct phy_driver *phydrv) 2820 { 2821 return phydrv->config_intr && phydrv->handle_interrupt; 2822 } 2823 2824 /** 2825 * phy_probe - probe and init a PHY device 2826 * @dev: device to probe and init 2827 * 2828 * Description: Take care of setting up the phy_device structure, 2829 * set the state to READY (the driver's init function should 2830 * set it to STARTING if needed). 2831 */ 2832 static int phy_probe(struct device *dev) 2833 { 2834 struct phy_device *phydev = to_phy_device(dev); 2835 struct device_driver *drv = phydev->mdio.dev.driver; 2836 struct phy_driver *phydrv = to_phy_driver(drv); 2837 int err = 0; 2838 2839 phydev->drv = phydrv; 2840 2841 /* Disable the interrupt if the PHY doesn't support it 2842 * but the interrupt is still a valid one 2843 */ 2844 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev)) 2845 phydev->irq = PHY_POLL; 2846 2847 if (phydrv->flags & PHY_IS_INTERNAL) 2848 phydev->is_internal = true; 2849 2850 mutex_lock(&phydev->lock); 2851 2852 /* Deassert the reset signal */ 2853 phy_device_reset(phydev, 0); 2854 2855 if (phydev->drv->probe) { 2856 err = phydev->drv->probe(phydev); 2857 if (err) 2858 goto out; 2859 } 2860 2861 /* Start out supporting everything. Eventually, 2862 * a controller will attach, and may modify one 2863 * or both of these values 2864 */ 2865 if (phydrv->features) { 2866 linkmode_copy(phydev->supported, phydrv->features); 2867 } else if (phydrv->get_features) { 2868 err = phydrv->get_features(phydev); 2869 } else if (phydev->is_c45) { 2870 err = genphy_c45_pma_read_abilities(phydev); 2871 } else { 2872 err = genphy_read_abilities(phydev); 2873 } 2874 2875 if (err) 2876 goto out; 2877 2878 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 2879 phydev->supported)) 2880 phydev->autoneg = 0; 2881 2882 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 2883 phydev->supported)) 2884 phydev->is_gigabit_capable = 1; 2885 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 2886 phydev->supported)) 2887 phydev->is_gigabit_capable = 1; 2888 2889 of_set_phy_supported(phydev); 2890 phy_advertise_supported(phydev); 2891 2892 /* Get the EEE modes we want to prohibit. We will ask 2893 * the PHY stop advertising these mode later on 2894 */ 2895 of_set_phy_eee_broken(phydev); 2896 2897 /* The Pause Frame bits indicate that the PHY can support passing 2898 * pause frames. During autonegotiation, the PHYs will determine if 2899 * they should allow pause frames to pass. The MAC driver should then 2900 * use that result to determine whether to enable flow control via 2901 * pause frames. 2902 * 2903 * Normally, PHY drivers should not set the Pause bits, and instead 2904 * allow phylib to do that. However, there may be some situations 2905 * (e.g. hardware erratum) where the driver wants to set only one 2906 * of these bits. 2907 */ 2908 if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) && 2909 !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) { 2910 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2911 phydev->supported); 2912 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2913 phydev->supported); 2914 } 2915 2916 /* Set the state to READY by default */ 2917 phydev->state = PHY_READY; 2918 2919 out: 2920 /* Assert the reset signal */ 2921 if (err) 2922 phy_device_reset(phydev, 1); 2923 2924 mutex_unlock(&phydev->lock); 2925 2926 return err; 2927 } 2928 2929 static int phy_remove(struct device *dev) 2930 { 2931 struct phy_device *phydev = to_phy_device(dev); 2932 2933 cancel_delayed_work_sync(&phydev->state_queue); 2934 2935 mutex_lock(&phydev->lock); 2936 phydev->state = PHY_DOWN; 2937 mutex_unlock(&phydev->lock); 2938 2939 sfp_bus_del_upstream(phydev->sfp_bus); 2940 phydev->sfp_bus = NULL; 2941 2942 if (phydev->drv && phydev->drv->remove) 2943 phydev->drv->remove(phydev); 2944 2945 /* Assert the reset signal */ 2946 phy_device_reset(phydev, 1); 2947 2948 phydev->drv = NULL; 2949 2950 return 0; 2951 } 2952 2953 static void phy_shutdown(struct device *dev) 2954 { 2955 struct phy_device *phydev = to_phy_device(dev); 2956 2957 phy_disable_interrupts(phydev); 2958 } 2959 2960 /** 2961 * phy_driver_register - register a phy_driver with the PHY layer 2962 * @new_driver: new phy_driver to register 2963 * @owner: module owning this PHY 2964 */ 2965 int phy_driver_register(struct phy_driver *new_driver, struct module *owner) 2966 { 2967 int retval; 2968 2969 /* Either the features are hard coded, or dynamically 2970 * determined. It cannot be both. 2971 */ 2972 if (WARN_ON(new_driver->features && new_driver->get_features)) { 2973 pr_err("%s: features and get_features must not both be set\n", 2974 new_driver->name); 2975 return -EINVAL; 2976 } 2977 2978 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY; 2979 new_driver->mdiodrv.driver.name = new_driver->name; 2980 new_driver->mdiodrv.driver.bus = &mdio_bus_type; 2981 new_driver->mdiodrv.driver.probe = phy_probe; 2982 new_driver->mdiodrv.driver.remove = phy_remove; 2983 new_driver->mdiodrv.driver.shutdown = phy_shutdown; 2984 new_driver->mdiodrv.driver.owner = owner; 2985 new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS; 2986 2987 retval = driver_register(&new_driver->mdiodrv.driver); 2988 if (retval) { 2989 pr_err("%s: Error %d in registering driver\n", 2990 new_driver->name, retval); 2991 2992 return retval; 2993 } 2994 2995 pr_debug("%s: Registered new driver\n", new_driver->name); 2996 2997 return 0; 2998 } 2999 EXPORT_SYMBOL(phy_driver_register); 3000 3001 int phy_drivers_register(struct phy_driver *new_driver, int n, 3002 struct module *owner) 3003 { 3004 int i, ret = 0; 3005 3006 for (i = 0; i < n; i++) { 3007 ret = phy_driver_register(new_driver + i, owner); 3008 if (ret) { 3009 while (i-- > 0) 3010 phy_driver_unregister(new_driver + i); 3011 break; 3012 } 3013 } 3014 return ret; 3015 } 3016 EXPORT_SYMBOL(phy_drivers_register); 3017 3018 void phy_driver_unregister(struct phy_driver *drv) 3019 { 3020 driver_unregister(&drv->mdiodrv.driver); 3021 } 3022 EXPORT_SYMBOL(phy_driver_unregister); 3023 3024 void phy_drivers_unregister(struct phy_driver *drv, int n) 3025 { 3026 int i; 3027 3028 for (i = 0; i < n; i++) 3029 phy_driver_unregister(drv + i); 3030 } 3031 EXPORT_SYMBOL(phy_drivers_unregister); 3032 3033 static struct phy_driver genphy_driver = { 3034 .phy_id = 0xffffffff, 3035 .phy_id_mask = 0xffffffff, 3036 .name = "Generic PHY", 3037 .get_features = genphy_read_abilities, 3038 .suspend = genphy_suspend, 3039 .resume = genphy_resume, 3040 .set_loopback = genphy_loopback, 3041 }; 3042 3043 static const struct ethtool_phy_ops phy_ethtool_phy_ops = { 3044 .get_sset_count = phy_ethtool_get_sset_count, 3045 .get_strings = phy_ethtool_get_strings, 3046 .get_stats = phy_ethtool_get_stats, 3047 .start_cable_test = phy_start_cable_test, 3048 .start_cable_test_tdr = phy_start_cable_test_tdr, 3049 }; 3050 3051 static int __init phy_init(void) 3052 { 3053 int rc; 3054 3055 rc = mdio_bus_init(); 3056 if (rc) 3057 return rc; 3058 3059 ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops); 3060 features_init(); 3061 3062 rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE); 3063 if (rc) 3064 goto err_c45; 3065 3066 rc = phy_driver_register(&genphy_driver, THIS_MODULE); 3067 if (rc) { 3068 phy_driver_unregister(&genphy_c45_driver); 3069 err_c45: 3070 mdio_bus_exit(); 3071 } 3072 3073 return rc; 3074 } 3075 3076 static void __exit phy_exit(void) 3077 { 3078 phy_driver_unregister(&genphy_c45_driver); 3079 phy_driver_unregister(&genphy_driver); 3080 mdio_bus_exit(); 3081 ethtool_set_ethtool_phy_ops(NULL); 3082 } 3083 3084 subsys_initcall(phy_init); 3085 module_exit(phy_exit); 3086