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