1 /* Framework for finding and configuring PHYs. 2 * Also contains generic PHY driver 3 * 4 * Author: Andy Fleming 5 * 6 * Copyright (c) 2004 Freescale Semiconductor, Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 * 13 */ 14 15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 16 17 #include <linux/kernel.h> 18 #include <linux/string.h> 19 #include <linux/errno.h> 20 #include <linux/unistd.h> 21 #include <linux/slab.h> 22 #include <linux/interrupt.h> 23 #include <linux/init.h> 24 #include <linux/delay.h> 25 #include <linux/netdevice.h> 26 #include <linux/etherdevice.h> 27 #include <linux/skbuff.h> 28 #include <linux/mm.h> 29 #include <linux/module.h> 30 #include <linux/mii.h> 31 #include <linux/ethtool.h> 32 #include <linux/bitmap.h> 33 #include <linux/phy.h> 34 #include <linux/phy_led_triggers.h> 35 #include <linux/mdio.h> 36 #include <linux/io.h> 37 #include <linux/uaccess.h> 38 #include <linux/of.h> 39 40 #include <asm/irq.h> 41 42 MODULE_DESCRIPTION("PHY library"); 43 MODULE_AUTHOR("Andy Fleming"); 44 MODULE_LICENSE("GPL"); 45 46 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_features) __ro_after_init; 47 EXPORT_SYMBOL_GPL(phy_basic_features); 48 49 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1_features) __ro_after_init; 50 EXPORT_SYMBOL_GPL(phy_basic_t1_features); 51 52 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_features) __ro_after_init; 53 EXPORT_SYMBOL_GPL(phy_gbit_features); 54 55 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_fibre_features) __ro_after_init; 56 EXPORT_SYMBOL_GPL(phy_gbit_fibre_features); 57 58 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_all_ports_features) __ro_after_init; 59 EXPORT_SYMBOL_GPL(phy_gbit_all_ports_features); 60 61 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_features) __ro_after_init; 62 EXPORT_SYMBOL_GPL(phy_10gbit_features); 63 64 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_fec_features) __ro_after_init; 65 EXPORT_SYMBOL_GPL(phy_10gbit_fec_features); 66 67 static const int phy_basic_ports_array[] = { 68 ETHTOOL_LINK_MODE_Autoneg_BIT, 69 ETHTOOL_LINK_MODE_TP_BIT, 70 ETHTOOL_LINK_MODE_MII_BIT, 71 }; 72 EXPORT_SYMBOL_GPL(phy_basic_ports_array); 73 74 static const int phy_fibre_port_array[] = { 75 ETHTOOL_LINK_MODE_FIBRE_BIT, 76 }; 77 EXPORT_SYMBOL_GPL(phy_fibre_port_array); 78 79 static const int phy_all_ports_features_array[] = { 80 ETHTOOL_LINK_MODE_Autoneg_BIT, 81 ETHTOOL_LINK_MODE_TP_BIT, 82 ETHTOOL_LINK_MODE_MII_BIT, 83 ETHTOOL_LINK_MODE_FIBRE_BIT, 84 ETHTOOL_LINK_MODE_AUI_BIT, 85 ETHTOOL_LINK_MODE_BNC_BIT, 86 ETHTOOL_LINK_MODE_Backplane_BIT, 87 }; 88 EXPORT_SYMBOL_GPL(phy_all_ports_features_array); 89 90 const int phy_10_100_features_array[4] = { 91 ETHTOOL_LINK_MODE_10baseT_Half_BIT, 92 ETHTOOL_LINK_MODE_10baseT_Full_BIT, 93 ETHTOOL_LINK_MODE_100baseT_Half_BIT, 94 ETHTOOL_LINK_MODE_100baseT_Full_BIT, 95 }; 96 EXPORT_SYMBOL_GPL(phy_10_100_features_array); 97 98 const int phy_basic_t1_features_array[2] = { 99 ETHTOOL_LINK_MODE_TP_BIT, 100 ETHTOOL_LINK_MODE_100baseT_Full_BIT, 101 }; 102 EXPORT_SYMBOL_GPL(phy_basic_t1_features_array); 103 104 const int phy_gbit_features_array[2] = { 105 ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 106 ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 107 }; 108 EXPORT_SYMBOL_GPL(phy_gbit_features_array); 109 110 const int phy_10gbit_features_array[1] = { 111 ETHTOOL_LINK_MODE_10000baseT_Full_BIT, 112 }; 113 EXPORT_SYMBOL_GPL(phy_10gbit_features_array); 114 115 const int phy_10gbit_fec_features_array[1] = { 116 ETHTOOL_LINK_MODE_10000baseR_FEC_BIT, 117 }; 118 EXPORT_SYMBOL_GPL(phy_10gbit_fec_features_array); 119 120 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_full_features) __ro_after_init; 121 EXPORT_SYMBOL_GPL(phy_10gbit_full_features); 122 123 static const int phy_10gbit_full_features_array[] = { 124 ETHTOOL_LINK_MODE_10baseT_Full_BIT, 125 ETHTOOL_LINK_MODE_100baseT_Full_BIT, 126 ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 127 ETHTOOL_LINK_MODE_10000baseT_Full_BIT, 128 }; 129 130 static void features_init(void) 131 { 132 /* 10/100 half/full*/ 133 linkmode_set_bit_array(phy_basic_ports_array, 134 ARRAY_SIZE(phy_basic_ports_array), 135 phy_basic_features); 136 linkmode_set_bit_array(phy_10_100_features_array, 137 ARRAY_SIZE(phy_10_100_features_array), 138 phy_basic_features); 139 140 /* 100 full, TP */ 141 linkmode_set_bit_array(phy_basic_t1_features_array, 142 ARRAY_SIZE(phy_basic_t1_features_array), 143 phy_basic_t1_features); 144 145 /* 10/100 half/full + 1000 half/full */ 146 linkmode_set_bit_array(phy_basic_ports_array, 147 ARRAY_SIZE(phy_basic_ports_array), 148 phy_gbit_features); 149 linkmode_set_bit_array(phy_10_100_features_array, 150 ARRAY_SIZE(phy_10_100_features_array), 151 phy_gbit_features); 152 linkmode_set_bit_array(phy_gbit_features_array, 153 ARRAY_SIZE(phy_gbit_features_array), 154 phy_gbit_features); 155 156 /* 10/100 half/full + 1000 half/full + fibre*/ 157 linkmode_set_bit_array(phy_basic_ports_array, 158 ARRAY_SIZE(phy_basic_ports_array), 159 phy_gbit_fibre_features); 160 linkmode_set_bit_array(phy_10_100_features_array, 161 ARRAY_SIZE(phy_10_100_features_array), 162 phy_gbit_fibre_features); 163 linkmode_set_bit_array(phy_gbit_features_array, 164 ARRAY_SIZE(phy_gbit_features_array), 165 phy_gbit_fibre_features); 166 linkmode_set_bit_array(phy_fibre_port_array, 167 ARRAY_SIZE(phy_fibre_port_array), 168 phy_gbit_fibre_features); 169 170 /* 10/100 half/full + 1000 half/full + TP/MII/FIBRE/AUI/BNC/Backplane*/ 171 linkmode_set_bit_array(phy_all_ports_features_array, 172 ARRAY_SIZE(phy_all_ports_features_array), 173 phy_gbit_all_ports_features); 174 linkmode_set_bit_array(phy_10_100_features_array, 175 ARRAY_SIZE(phy_10_100_features_array), 176 phy_gbit_all_ports_features); 177 linkmode_set_bit_array(phy_gbit_features_array, 178 ARRAY_SIZE(phy_gbit_features_array), 179 phy_gbit_all_ports_features); 180 181 /* 10/100 half/full + 1000 half/full + 10G full*/ 182 linkmode_set_bit_array(phy_all_ports_features_array, 183 ARRAY_SIZE(phy_all_ports_features_array), 184 phy_10gbit_features); 185 linkmode_set_bit_array(phy_10_100_features_array, 186 ARRAY_SIZE(phy_10_100_features_array), 187 phy_10gbit_features); 188 linkmode_set_bit_array(phy_gbit_features_array, 189 ARRAY_SIZE(phy_gbit_features_array), 190 phy_10gbit_features); 191 linkmode_set_bit_array(phy_10gbit_features_array, 192 ARRAY_SIZE(phy_10gbit_features_array), 193 phy_10gbit_features); 194 195 /* 10/100/1000/10G full */ 196 linkmode_set_bit_array(phy_all_ports_features_array, 197 ARRAY_SIZE(phy_all_ports_features_array), 198 phy_10gbit_full_features); 199 linkmode_set_bit_array(phy_10gbit_full_features_array, 200 ARRAY_SIZE(phy_10gbit_full_features_array), 201 phy_10gbit_full_features); 202 /* 10G FEC only */ 203 linkmode_set_bit_array(phy_10gbit_fec_features_array, 204 ARRAY_SIZE(phy_10gbit_fec_features_array), 205 phy_10gbit_fec_features); 206 } 207 208 void phy_device_free(struct phy_device *phydev) 209 { 210 put_device(&phydev->mdio.dev); 211 } 212 EXPORT_SYMBOL(phy_device_free); 213 214 static void phy_mdio_device_free(struct mdio_device *mdiodev) 215 { 216 struct phy_device *phydev; 217 218 phydev = container_of(mdiodev, struct phy_device, mdio); 219 phy_device_free(phydev); 220 } 221 222 static void phy_device_release(struct device *dev) 223 { 224 kfree(to_phy_device(dev)); 225 } 226 227 static void phy_mdio_device_remove(struct mdio_device *mdiodev) 228 { 229 struct phy_device *phydev; 230 231 phydev = container_of(mdiodev, struct phy_device, mdio); 232 phy_device_remove(phydev); 233 } 234 235 static struct phy_driver genphy_driver; 236 extern struct phy_driver genphy_10g_driver; 237 238 static LIST_HEAD(phy_fixup_list); 239 static DEFINE_MUTEX(phy_fixup_lock); 240 241 #ifdef CONFIG_PM 242 static bool mdio_bus_phy_may_suspend(struct phy_device *phydev) 243 { 244 struct device_driver *drv = phydev->mdio.dev.driver; 245 struct phy_driver *phydrv = to_phy_driver(drv); 246 struct net_device *netdev = phydev->attached_dev; 247 248 if (!drv || !phydrv->suspend) 249 return false; 250 251 /* PHY not attached? May suspend if the PHY has not already been 252 * suspended as part of a prior call to phy_disconnect() -> 253 * phy_detach() -> phy_suspend() because the parent netdev might be the 254 * MDIO bus driver and clock gated at this point. 255 */ 256 if (!netdev) 257 return !phydev->suspended; 258 259 if (netdev->wol_enabled) 260 return false; 261 262 /* As long as not all affected network drivers support the 263 * wol_enabled flag, let's check for hints that WoL is enabled. 264 * Don't suspend PHY if the attached netdev parent may wake up. 265 * The parent may point to a PCI device, as in tg3 driver. 266 */ 267 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent)) 268 return false; 269 270 /* Also don't suspend PHY if the netdev itself may wakeup. This 271 * is the case for devices w/o underlaying pwr. mgmt. aware bus, 272 * e.g. SoC devices. 273 */ 274 if (device_may_wakeup(&netdev->dev)) 275 return false; 276 277 return true; 278 } 279 280 static int mdio_bus_phy_suspend(struct device *dev) 281 { 282 struct phy_device *phydev = to_phy_device(dev); 283 284 /* We must stop the state machine manually, otherwise it stops out of 285 * control, possibly with the phydev->lock held. Upon resume, netdev 286 * may call phy routines that try to grab the same lock, and that may 287 * lead to a deadlock. 288 */ 289 if (phydev->attached_dev && phydev->adjust_link) 290 phy_stop_machine(phydev); 291 292 if (!mdio_bus_phy_may_suspend(phydev)) 293 return 0; 294 295 return phy_suspend(phydev); 296 } 297 298 static int mdio_bus_phy_resume(struct device *dev) 299 { 300 struct phy_device *phydev = to_phy_device(dev); 301 int ret; 302 303 if (!mdio_bus_phy_may_suspend(phydev)) 304 goto no_resume; 305 306 ret = phy_resume(phydev); 307 if (ret < 0) 308 return ret; 309 310 no_resume: 311 if (phydev->attached_dev && phydev->adjust_link) 312 phy_start_machine(phydev); 313 314 return 0; 315 } 316 317 static int mdio_bus_phy_restore(struct device *dev) 318 { 319 struct phy_device *phydev = to_phy_device(dev); 320 struct net_device *netdev = phydev->attached_dev; 321 int ret; 322 323 if (!netdev) 324 return 0; 325 326 ret = phy_init_hw(phydev); 327 if (ret < 0) 328 return ret; 329 330 if (phydev->attached_dev && phydev->adjust_link) 331 phy_start_machine(phydev); 332 333 return 0; 334 } 335 336 static const struct dev_pm_ops mdio_bus_phy_pm_ops = { 337 .suspend = mdio_bus_phy_suspend, 338 .resume = mdio_bus_phy_resume, 339 .freeze = mdio_bus_phy_suspend, 340 .thaw = mdio_bus_phy_resume, 341 .restore = mdio_bus_phy_restore, 342 }; 343 344 #define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops) 345 346 #else 347 348 #define MDIO_BUS_PHY_PM_OPS NULL 349 350 #endif /* CONFIG_PM */ 351 352 /** 353 * phy_register_fixup - creates a new phy_fixup and adds it to the list 354 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID) 355 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) 356 * It can also be PHY_ANY_UID 357 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before 358 * comparison 359 * @run: The actual code to be run when a matching PHY is found 360 */ 361 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, 362 int (*run)(struct phy_device *)) 363 { 364 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); 365 366 if (!fixup) 367 return -ENOMEM; 368 369 strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); 370 fixup->phy_uid = phy_uid; 371 fixup->phy_uid_mask = phy_uid_mask; 372 fixup->run = run; 373 374 mutex_lock(&phy_fixup_lock); 375 list_add_tail(&fixup->list, &phy_fixup_list); 376 mutex_unlock(&phy_fixup_lock); 377 378 return 0; 379 } 380 EXPORT_SYMBOL(phy_register_fixup); 381 382 /* Registers a fixup to be run on any PHY with the UID in phy_uid */ 383 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, 384 int (*run)(struct phy_device *)) 385 { 386 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); 387 } 388 EXPORT_SYMBOL(phy_register_fixup_for_uid); 389 390 /* Registers a fixup to be run on the PHY with id string bus_id */ 391 int phy_register_fixup_for_id(const char *bus_id, 392 int (*run)(struct phy_device *)) 393 { 394 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); 395 } 396 EXPORT_SYMBOL(phy_register_fixup_for_id); 397 398 /** 399 * phy_unregister_fixup - remove a phy_fixup from the list 400 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list 401 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list 402 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison 403 */ 404 int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask) 405 { 406 struct list_head *pos, *n; 407 struct phy_fixup *fixup; 408 int ret; 409 410 ret = -ENODEV; 411 412 mutex_lock(&phy_fixup_lock); 413 list_for_each_safe(pos, n, &phy_fixup_list) { 414 fixup = list_entry(pos, struct phy_fixup, list); 415 416 if ((!strcmp(fixup->bus_id, bus_id)) && 417 ((fixup->phy_uid & phy_uid_mask) == 418 (phy_uid & phy_uid_mask))) { 419 list_del(&fixup->list); 420 kfree(fixup); 421 ret = 0; 422 break; 423 } 424 } 425 mutex_unlock(&phy_fixup_lock); 426 427 return ret; 428 } 429 EXPORT_SYMBOL(phy_unregister_fixup); 430 431 /* Unregisters a fixup of any PHY with the UID in phy_uid */ 432 int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask) 433 { 434 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask); 435 } 436 EXPORT_SYMBOL(phy_unregister_fixup_for_uid); 437 438 /* Unregisters a fixup of the PHY with id string bus_id */ 439 int phy_unregister_fixup_for_id(const char *bus_id) 440 { 441 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff); 442 } 443 EXPORT_SYMBOL(phy_unregister_fixup_for_id); 444 445 /* Returns 1 if fixup matches phydev in bus_id and phy_uid. 446 * Fixups can be set to match any in one or more fields. 447 */ 448 static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) 449 { 450 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0) 451 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) 452 return 0; 453 454 if ((fixup->phy_uid & fixup->phy_uid_mask) != 455 (phydev->phy_id & fixup->phy_uid_mask)) 456 if (fixup->phy_uid != PHY_ANY_UID) 457 return 0; 458 459 return 1; 460 } 461 462 /* Runs any matching fixups for this phydev */ 463 static int phy_scan_fixups(struct phy_device *phydev) 464 { 465 struct phy_fixup *fixup; 466 467 mutex_lock(&phy_fixup_lock); 468 list_for_each_entry(fixup, &phy_fixup_list, list) { 469 if (phy_needs_fixup(phydev, fixup)) { 470 int err = fixup->run(phydev); 471 472 if (err < 0) { 473 mutex_unlock(&phy_fixup_lock); 474 return err; 475 } 476 phydev->has_fixups = true; 477 } 478 } 479 mutex_unlock(&phy_fixup_lock); 480 481 return 0; 482 } 483 484 static int phy_bus_match(struct device *dev, struct device_driver *drv) 485 { 486 struct phy_device *phydev = to_phy_device(dev); 487 struct phy_driver *phydrv = to_phy_driver(drv); 488 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids); 489 int i; 490 491 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY)) 492 return 0; 493 494 if (phydrv->match_phy_device) 495 return phydrv->match_phy_device(phydev); 496 497 if (phydev->is_c45) { 498 for (i = 1; i < num_ids; i++) { 499 if (!(phydev->c45_ids.devices_in_package & (1 << i))) 500 continue; 501 502 if ((phydrv->phy_id & phydrv->phy_id_mask) == 503 (phydev->c45_ids.device_ids[i] & 504 phydrv->phy_id_mask)) 505 return 1; 506 } 507 return 0; 508 } else { 509 return (phydrv->phy_id & phydrv->phy_id_mask) == 510 (phydev->phy_id & phydrv->phy_id_mask); 511 } 512 } 513 514 static ssize_t 515 phy_id_show(struct device *dev, struct device_attribute *attr, char *buf) 516 { 517 struct phy_device *phydev = to_phy_device(dev); 518 519 return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id); 520 } 521 static DEVICE_ATTR_RO(phy_id); 522 523 static ssize_t 524 phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf) 525 { 526 struct phy_device *phydev = to_phy_device(dev); 527 const char *mode = NULL; 528 529 if (phy_is_internal(phydev)) 530 mode = "internal"; 531 else 532 mode = phy_modes(phydev->interface); 533 534 return sprintf(buf, "%s\n", mode); 535 } 536 static DEVICE_ATTR_RO(phy_interface); 537 538 static ssize_t 539 phy_has_fixups_show(struct device *dev, struct device_attribute *attr, 540 char *buf) 541 { 542 struct phy_device *phydev = to_phy_device(dev); 543 544 return sprintf(buf, "%d\n", phydev->has_fixups); 545 } 546 static DEVICE_ATTR_RO(phy_has_fixups); 547 548 static struct attribute *phy_dev_attrs[] = { 549 &dev_attr_phy_id.attr, 550 &dev_attr_phy_interface.attr, 551 &dev_attr_phy_has_fixups.attr, 552 NULL, 553 }; 554 ATTRIBUTE_GROUPS(phy_dev); 555 556 static const struct device_type mdio_bus_phy_type = { 557 .name = "PHY", 558 .groups = phy_dev_groups, 559 .release = phy_device_release, 560 .pm = MDIO_BUS_PHY_PM_OPS, 561 }; 562 563 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id, 564 bool is_c45, 565 struct phy_c45_device_ids *c45_ids) 566 { 567 struct phy_device *dev; 568 struct mdio_device *mdiodev; 569 570 /* We allocate the device, and initialize the default values */ 571 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 572 if (!dev) 573 return ERR_PTR(-ENOMEM); 574 575 mdiodev = &dev->mdio; 576 mdiodev->dev.parent = &bus->dev; 577 mdiodev->dev.bus = &mdio_bus_type; 578 mdiodev->dev.type = &mdio_bus_phy_type; 579 mdiodev->bus = bus; 580 mdiodev->bus_match = phy_bus_match; 581 mdiodev->addr = addr; 582 mdiodev->flags = MDIO_DEVICE_FLAG_PHY; 583 mdiodev->device_free = phy_mdio_device_free; 584 mdiodev->device_remove = phy_mdio_device_remove; 585 586 dev->speed = 0; 587 dev->duplex = -1; 588 dev->pause = 0; 589 dev->asym_pause = 0; 590 dev->link = 0; 591 dev->interface = PHY_INTERFACE_MODE_GMII; 592 593 dev->autoneg = AUTONEG_ENABLE; 594 595 dev->is_c45 = is_c45; 596 dev->phy_id = phy_id; 597 if (c45_ids) 598 dev->c45_ids = *c45_ids; 599 dev->irq = bus->irq[addr]; 600 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr); 601 602 dev->state = PHY_DOWN; 603 604 mutex_init(&dev->lock); 605 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); 606 607 /* Request the appropriate module unconditionally; don't 608 * bother trying to do so only if it isn't already loaded, 609 * because that gets complicated. A hotplug event would have 610 * done an unconditional modprobe anyway. 611 * We don't do normal hotplug because it won't work for MDIO 612 * -- because it relies on the device staying around for long 613 * enough for the driver to get loaded. With MDIO, the NIC 614 * driver will get bored and give up as soon as it finds that 615 * there's no driver _already_ loaded. 616 */ 617 if (is_c45 && c45_ids) { 618 const int num_ids = ARRAY_SIZE(c45_ids->device_ids); 619 int i; 620 621 for (i = 1; i < num_ids; i++) { 622 if (!(c45_ids->devices_in_package & (1 << i))) 623 continue; 624 625 request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, 626 MDIO_ID_ARGS(c45_ids->device_ids[i])); 627 } 628 } else { 629 request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, 630 MDIO_ID_ARGS(phy_id)); 631 } 632 633 device_initialize(&mdiodev->dev); 634 635 return dev; 636 } 637 EXPORT_SYMBOL(phy_device_create); 638 639 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers. 640 * @bus: the target MII bus 641 * @addr: PHY address on the MII bus 642 * @dev_addr: MMD address in the PHY. 643 * @devices_in_package: where to store the devices in package information. 644 * 645 * Description: reads devices in package registers of a MMD at @dev_addr 646 * from PHY at @addr on @bus. 647 * 648 * Returns: 0 on success, -EIO on failure. 649 */ 650 static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr, 651 u32 *devices_in_package) 652 { 653 int phy_reg, reg_addr; 654 655 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2; 656 phy_reg = mdiobus_read(bus, addr, reg_addr); 657 if (phy_reg < 0) 658 return -EIO; 659 *devices_in_package = (phy_reg & 0xffff) << 16; 660 661 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1; 662 phy_reg = mdiobus_read(bus, addr, reg_addr); 663 if (phy_reg < 0) 664 return -EIO; 665 *devices_in_package |= (phy_reg & 0xffff); 666 667 return 0; 668 } 669 670 /** 671 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. 672 * @bus: the target MII bus 673 * @addr: PHY address on the MII bus 674 * @phy_id: where to store the ID retrieved. 675 * @c45_ids: where to store the c45 ID information. 676 * 677 * If the PHY devices-in-package appears to be valid, it and the 678 * corresponding identifiers are stored in @c45_ids, zero is stored 679 * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns 680 * zero on success. 681 * 682 */ 683 static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id, 684 struct phy_c45_device_ids *c45_ids) { 685 int phy_reg; 686 int i, reg_addr; 687 const int num_ids = ARRAY_SIZE(c45_ids->device_ids); 688 u32 *devs = &c45_ids->devices_in_package; 689 690 /* Find first non-zero Devices In package. Device zero is reserved 691 * for 802.3 c45 complied PHYs, so don't probe it at first. 692 */ 693 for (i = 1; i < num_ids && *devs == 0; i++) { 694 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs); 695 if (phy_reg < 0) 696 return -EIO; 697 698 if ((*devs & 0x1fffffff) == 0x1fffffff) { 699 /* If mostly Fs, there is no device there, 700 * then let's continue to probe more, as some 701 * 10G PHYs have zero Devices In package, 702 * e.g. Cortina CS4315/CS4340 PHY. 703 */ 704 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs); 705 if (phy_reg < 0) 706 return -EIO; 707 /* no device there, let's get out of here */ 708 if ((*devs & 0x1fffffff) == 0x1fffffff) { 709 *phy_id = 0xffffffff; 710 return 0; 711 } else { 712 break; 713 } 714 } 715 } 716 717 /* Now probe Device Identifiers for each device present. */ 718 for (i = 1; i < num_ids; i++) { 719 if (!(c45_ids->devices_in_package & (1 << i))) 720 continue; 721 722 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1; 723 phy_reg = mdiobus_read(bus, addr, reg_addr); 724 if (phy_reg < 0) 725 return -EIO; 726 c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16; 727 728 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2; 729 phy_reg = mdiobus_read(bus, addr, reg_addr); 730 if (phy_reg < 0) 731 return -EIO; 732 c45_ids->device_ids[i] |= (phy_reg & 0xffff); 733 } 734 *phy_id = 0; 735 return 0; 736 } 737 738 /** 739 * get_phy_id - reads the specified addr for its ID. 740 * @bus: the target MII bus 741 * @addr: PHY address on the MII bus 742 * @phy_id: where to store the ID retrieved. 743 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol 744 * @c45_ids: where to store the c45 ID information. 745 * 746 * Description: In the case of a 802.3-c22 PHY, reads the ID registers 747 * of the PHY at @addr on the @bus, stores it in @phy_id and returns 748 * zero on success. 749 * 750 * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and 751 * its return value is in turn returned. 752 * 753 */ 754 static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id, 755 bool is_c45, struct phy_c45_device_ids *c45_ids) 756 { 757 int phy_reg; 758 759 if (is_c45) 760 return get_phy_c45_ids(bus, addr, phy_id, c45_ids); 761 762 /* Grab the bits from PHYIR1, and put them in the upper half */ 763 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); 764 if (phy_reg < 0) { 765 /* if there is no device, return without an error so scanning 766 * the bus works properly 767 */ 768 if (phy_reg == -EIO || phy_reg == -ENODEV) { 769 *phy_id = 0xffffffff; 770 return 0; 771 } 772 773 return -EIO; 774 } 775 776 *phy_id = (phy_reg & 0xffff) << 16; 777 778 /* Grab the bits from PHYIR2, and put them in the lower half */ 779 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); 780 if (phy_reg < 0) 781 return -EIO; 782 783 *phy_id |= (phy_reg & 0xffff); 784 785 return 0; 786 } 787 788 /** 789 * get_phy_device - reads the specified PHY device and returns its @phy_device 790 * struct 791 * @bus: the target MII bus 792 * @addr: PHY address on the MII bus 793 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol 794 * 795 * Description: Reads the ID registers of the PHY at @addr on the 796 * @bus, then allocates and returns the phy_device to represent it. 797 */ 798 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) 799 { 800 struct phy_c45_device_ids c45_ids = {0}; 801 u32 phy_id = 0; 802 int r; 803 804 r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids); 805 if (r) 806 return ERR_PTR(r); 807 808 /* If the phy_id is mostly Fs, there is no device there */ 809 if ((phy_id & 0x1fffffff) == 0x1fffffff) 810 return ERR_PTR(-ENODEV); 811 812 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); 813 } 814 EXPORT_SYMBOL(get_phy_device); 815 816 /** 817 * phy_device_register - Register the phy device on the MDIO bus 818 * @phydev: phy_device structure to be added to the MDIO bus 819 */ 820 int phy_device_register(struct phy_device *phydev) 821 { 822 int err; 823 824 err = mdiobus_register_device(&phydev->mdio); 825 if (err) 826 return err; 827 828 /* Deassert the reset signal */ 829 phy_device_reset(phydev, 0); 830 831 /* Run all of the fixups for this PHY */ 832 err = phy_scan_fixups(phydev); 833 if (err) { 834 pr_err("PHY %d failed to initialize\n", phydev->mdio.addr); 835 goto out; 836 } 837 838 err = device_add(&phydev->mdio.dev); 839 if (err) { 840 pr_err("PHY %d failed to add\n", phydev->mdio.addr); 841 goto out; 842 } 843 844 return 0; 845 846 out: 847 /* Assert the reset signal */ 848 phy_device_reset(phydev, 1); 849 850 mdiobus_unregister_device(&phydev->mdio); 851 return err; 852 } 853 EXPORT_SYMBOL(phy_device_register); 854 855 /** 856 * phy_device_remove - Remove a previously registered phy device from the MDIO bus 857 * @phydev: phy_device structure to remove 858 * 859 * This doesn't free the phy_device itself, it merely reverses the effects 860 * of phy_device_register(). Use phy_device_free() to free the device 861 * after calling this function. 862 */ 863 void phy_device_remove(struct phy_device *phydev) 864 { 865 device_del(&phydev->mdio.dev); 866 867 /* Assert the reset signal */ 868 phy_device_reset(phydev, 1); 869 870 mdiobus_unregister_device(&phydev->mdio); 871 } 872 EXPORT_SYMBOL(phy_device_remove); 873 874 /** 875 * phy_find_first - finds the first PHY device on the bus 876 * @bus: the target MII bus 877 */ 878 struct phy_device *phy_find_first(struct mii_bus *bus) 879 { 880 struct phy_device *phydev; 881 int addr; 882 883 for (addr = 0; addr < PHY_MAX_ADDR; addr++) { 884 phydev = mdiobus_get_phy(bus, addr); 885 if (phydev) 886 return phydev; 887 } 888 return NULL; 889 } 890 EXPORT_SYMBOL(phy_find_first); 891 892 static void phy_link_change(struct phy_device *phydev, bool up, bool do_carrier) 893 { 894 struct net_device *netdev = phydev->attached_dev; 895 896 if (do_carrier) { 897 if (up) 898 netif_carrier_on(netdev); 899 else 900 netif_carrier_off(netdev); 901 } 902 phydev->adjust_link(netdev); 903 } 904 905 /** 906 * phy_prepare_link - prepares the PHY layer to monitor link status 907 * @phydev: target phy_device struct 908 * @handler: callback function for link status change notifications 909 * 910 * Description: Tells the PHY infrastructure to handle the 911 * gory details on monitoring link status (whether through 912 * polling or an interrupt), and to call back to the 913 * connected device driver when the link status changes. 914 * If you want to monitor your own link state, don't call 915 * this function. 916 */ 917 static void phy_prepare_link(struct phy_device *phydev, 918 void (*handler)(struct net_device *)) 919 { 920 phydev->adjust_link = handler; 921 } 922 923 /** 924 * phy_connect_direct - connect an ethernet device to a specific phy_device 925 * @dev: the network device to connect 926 * @phydev: the pointer to the phy device 927 * @handler: callback function for state change notifications 928 * @interface: PHY device's interface 929 */ 930 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, 931 void (*handler)(struct net_device *), 932 phy_interface_t interface) 933 { 934 int rc; 935 936 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); 937 if (rc) 938 return rc; 939 940 phy_prepare_link(phydev, handler); 941 phy_start_machine(phydev); 942 if (phydev->irq > 0) 943 phy_start_interrupts(phydev); 944 945 return 0; 946 } 947 EXPORT_SYMBOL(phy_connect_direct); 948 949 /** 950 * phy_connect - connect an ethernet device to a PHY device 951 * @dev: the network device to connect 952 * @bus_id: the id string of the PHY device to connect 953 * @handler: callback function for state change notifications 954 * @interface: PHY device's interface 955 * 956 * Description: Convenience function for connecting ethernet 957 * devices to PHY devices. The default behavior is for 958 * the PHY infrastructure to handle everything, and only notify 959 * the connected driver when the link status changes. If you 960 * don't want, or can't use the provided functionality, you may 961 * choose to call only the subset of functions which provide 962 * the desired functionality. 963 */ 964 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, 965 void (*handler)(struct net_device *), 966 phy_interface_t interface) 967 { 968 struct phy_device *phydev; 969 struct device *d; 970 int rc; 971 972 /* Search the list of PHY devices on the mdio bus for the 973 * PHY with the requested name 974 */ 975 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); 976 if (!d) { 977 pr_err("PHY %s not found\n", bus_id); 978 return ERR_PTR(-ENODEV); 979 } 980 phydev = to_phy_device(d); 981 982 rc = phy_connect_direct(dev, phydev, handler, interface); 983 put_device(d); 984 if (rc) 985 return ERR_PTR(rc); 986 987 return phydev; 988 } 989 EXPORT_SYMBOL(phy_connect); 990 991 /** 992 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY 993 * device 994 * @phydev: target phy_device struct 995 */ 996 void phy_disconnect(struct phy_device *phydev) 997 { 998 if (phydev->irq > 0) 999 phy_stop_interrupts(phydev); 1000 1001 phy_stop_machine(phydev); 1002 1003 phydev->adjust_link = NULL; 1004 1005 phy_detach(phydev); 1006 } 1007 EXPORT_SYMBOL(phy_disconnect); 1008 1009 /** 1010 * phy_poll_reset - Safely wait until a PHY reset has properly completed 1011 * @phydev: The PHY device to poll 1012 * 1013 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as 1014 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR 1015 * register must be polled until the BMCR_RESET bit clears. 1016 * 1017 * Furthermore, any attempts to write to PHY registers may have no effect 1018 * or even generate MDIO bus errors until this is complete. 1019 * 1020 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the 1021 * standard and do not fully reset after the BMCR_RESET bit is set, and may 1022 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an 1023 * effort to support such broken PHYs, this function is separate from the 1024 * standard phy_init_hw() which will zero all the other bits in the BMCR 1025 * and reapply all driver-specific and board-specific fixups. 1026 */ 1027 static int phy_poll_reset(struct phy_device *phydev) 1028 { 1029 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ 1030 unsigned int retries = 12; 1031 int ret; 1032 1033 do { 1034 msleep(50); 1035 ret = phy_read(phydev, MII_BMCR); 1036 if (ret < 0) 1037 return ret; 1038 } while (ret & BMCR_RESET && --retries); 1039 if (ret & BMCR_RESET) 1040 return -ETIMEDOUT; 1041 1042 /* Some chips (smsc911x) may still need up to another 1ms after the 1043 * BMCR_RESET bit is cleared before they are usable. 1044 */ 1045 msleep(1); 1046 return 0; 1047 } 1048 1049 int phy_init_hw(struct phy_device *phydev) 1050 { 1051 int ret = 0; 1052 1053 /* Deassert the reset signal */ 1054 phy_device_reset(phydev, 0); 1055 1056 if (!phydev->drv || !phydev->drv->config_init) 1057 return 0; 1058 1059 if (phydev->drv->soft_reset) 1060 ret = phydev->drv->soft_reset(phydev); 1061 1062 if (ret < 0) 1063 return ret; 1064 1065 ret = phy_scan_fixups(phydev); 1066 if (ret < 0) 1067 return ret; 1068 1069 return phydev->drv->config_init(phydev); 1070 } 1071 EXPORT_SYMBOL(phy_init_hw); 1072 1073 void phy_attached_info(struct phy_device *phydev) 1074 { 1075 phy_attached_print(phydev, NULL); 1076 } 1077 EXPORT_SYMBOL(phy_attached_info); 1078 1079 #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%s)" 1080 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...) 1081 { 1082 const char *drv_name = phydev->drv ? phydev->drv->name : "unbound"; 1083 char *irq_str; 1084 char irq_num[8]; 1085 1086 switch(phydev->irq) { 1087 case PHY_POLL: 1088 irq_str = "POLL"; 1089 break; 1090 case PHY_IGNORE_INTERRUPT: 1091 irq_str = "IGNORE"; 1092 break; 1093 default: 1094 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq); 1095 irq_str = irq_num; 1096 break; 1097 } 1098 1099 1100 if (!fmt) { 1101 phydev_info(phydev, ATTACHED_FMT "\n", 1102 drv_name, phydev_name(phydev), 1103 irq_str); 1104 } else { 1105 va_list ap; 1106 1107 phydev_info(phydev, ATTACHED_FMT, 1108 drv_name, phydev_name(phydev), 1109 irq_str); 1110 1111 va_start(ap, fmt); 1112 vprintk(fmt, ap); 1113 va_end(ap); 1114 } 1115 } 1116 EXPORT_SYMBOL(phy_attached_print); 1117 1118 /** 1119 * phy_attach_direct - attach a network device to a given PHY device pointer 1120 * @dev: network device to attach 1121 * @phydev: Pointer to phy_device to attach 1122 * @flags: PHY device's dev_flags 1123 * @interface: PHY device's interface 1124 * 1125 * Description: Called by drivers to attach to a particular PHY 1126 * device. The phy_device is found, and properly hooked up 1127 * to the phy_driver. If no driver is attached, then a 1128 * generic driver is used. The phy_device is given a ptr to 1129 * the attaching device, and given a callback for link status 1130 * change. The phy_device is returned to the attaching driver. 1131 * This function takes a reference on the phy device. 1132 */ 1133 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, 1134 u32 flags, phy_interface_t interface) 1135 { 1136 struct module *ndev_owner = dev->dev.parent->driver->owner; 1137 struct mii_bus *bus = phydev->mdio.bus; 1138 struct device *d = &phydev->mdio.dev; 1139 bool using_genphy = false; 1140 int err; 1141 1142 /* For Ethernet device drivers that register their own MDIO bus, we 1143 * will have bus->owner match ndev_mod, so we do not want to increment 1144 * our own module->refcnt here, otherwise we would not be able to 1145 * unload later on. 1146 */ 1147 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) { 1148 dev_err(&dev->dev, "failed to get the bus module\n"); 1149 return -EIO; 1150 } 1151 1152 get_device(d); 1153 1154 /* Assume that if there is no driver, that it doesn't 1155 * exist, and we should use the genphy driver. 1156 */ 1157 if (!d->driver) { 1158 if (phydev->is_c45) 1159 d->driver = &genphy_10g_driver.mdiodrv.driver; 1160 else 1161 d->driver = &genphy_driver.mdiodrv.driver; 1162 1163 using_genphy = true; 1164 } 1165 1166 if (!try_module_get(d->driver->owner)) { 1167 dev_err(&dev->dev, "failed to get the device driver module\n"); 1168 err = -EIO; 1169 goto error_put_device; 1170 } 1171 1172 if (using_genphy) { 1173 err = d->driver->probe(d); 1174 if (err >= 0) 1175 err = device_bind_driver(d); 1176 1177 if (err) 1178 goto error_module_put; 1179 } 1180 1181 if (phydev->attached_dev) { 1182 dev_err(&dev->dev, "PHY already attached\n"); 1183 err = -EBUSY; 1184 goto error; 1185 } 1186 1187 phydev->phy_link_change = phy_link_change; 1188 phydev->attached_dev = dev; 1189 dev->phydev = phydev; 1190 1191 /* Some Ethernet drivers try to connect to a PHY device before 1192 * calling register_netdevice() -> netdev_register_kobject() and 1193 * does the dev->dev.kobj initialization. Here we only check for 1194 * success which indicates that the network device kobject is 1195 * ready. Once we do that we still need to keep track of whether 1196 * links were successfully set up or not for phy_detach() to 1197 * remove them accordingly. 1198 */ 1199 phydev->sysfs_links = false; 1200 1201 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj, 1202 "attached_dev"); 1203 if (!err) { 1204 err = sysfs_create_link_nowarn(&dev->dev.kobj, 1205 &phydev->mdio.dev.kobj, 1206 "phydev"); 1207 if (err) { 1208 dev_err(&dev->dev, "could not add device link to %s err %d\n", 1209 kobject_name(&phydev->mdio.dev.kobj), 1210 err); 1211 /* non-fatal - some net drivers can use one netdevice 1212 * with more then one phy 1213 */ 1214 } 1215 1216 phydev->sysfs_links = true; 1217 } 1218 1219 phydev->dev_flags = flags; 1220 1221 phydev->interface = interface; 1222 1223 phydev->state = PHY_READY; 1224 1225 /* Initial carrier state is off as the phy is about to be 1226 * (re)initialized. 1227 */ 1228 netif_carrier_off(phydev->attached_dev); 1229 1230 /* Do initial configuration here, now that 1231 * we have certain key parameters 1232 * (dev_flags and interface) 1233 */ 1234 err = phy_init_hw(phydev); 1235 if (err) 1236 goto error; 1237 1238 phy_resume(phydev); 1239 phy_led_triggers_register(phydev); 1240 1241 return err; 1242 1243 error: 1244 /* phy_detach() does all of the cleanup below */ 1245 phy_detach(phydev); 1246 return err; 1247 1248 error_module_put: 1249 module_put(d->driver->owner); 1250 error_put_device: 1251 put_device(d); 1252 if (ndev_owner != bus->owner) 1253 module_put(bus->owner); 1254 return err; 1255 } 1256 EXPORT_SYMBOL(phy_attach_direct); 1257 1258 /** 1259 * phy_attach - attach a network device to a particular PHY device 1260 * @dev: network device to attach 1261 * @bus_id: Bus ID of PHY device to attach 1262 * @interface: PHY device's interface 1263 * 1264 * Description: Same as phy_attach_direct() except that a PHY bus_id 1265 * string is passed instead of a pointer to a struct phy_device. 1266 */ 1267 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, 1268 phy_interface_t interface) 1269 { 1270 struct bus_type *bus = &mdio_bus_type; 1271 struct phy_device *phydev; 1272 struct device *d; 1273 int rc; 1274 1275 /* Search the list of PHY devices on the mdio bus for the 1276 * PHY with the requested name 1277 */ 1278 d = bus_find_device_by_name(bus, NULL, bus_id); 1279 if (!d) { 1280 pr_err("PHY %s not found\n", bus_id); 1281 return ERR_PTR(-ENODEV); 1282 } 1283 phydev = to_phy_device(d); 1284 1285 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); 1286 put_device(d); 1287 if (rc) 1288 return ERR_PTR(rc); 1289 1290 return phydev; 1291 } 1292 EXPORT_SYMBOL(phy_attach); 1293 1294 /** 1295 * phy_detach - detach a PHY device from its network device 1296 * @phydev: target phy_device struct 1297 * 1298 * This detaches the phy device from its network device and the phy 1299 * driver, and drops the reference count taken in phy_attach_direct(). 1300 */ 1301 void phy_detach(struct phy_device *phydev) 1302 { 1303 struct net_device *dev = phydev->attached_dev; 1304 struct module *ndev_owner = dev->dev.parent->driver->owner; 1305 struct mii_bus *bus; 1306 1307 if (phydev->sysfs_links) { 1308 sysfs_remove_link(&dev->dev.kobj, "phydev"); 1309 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev"); 1310 } 1311 phy_suspend(phydev); 1312 phydev->attached_dev->phydev = NULL; 1313 phydev->attached_dev = NULL; 1314 phydev->phylink = NULL; 1315 1316 phy_led_triggers_unregister(phydev); 1317 1318 module_put(phydev->mdio.dev.driver->owner); 1319 1320 /* If the device had no specific driver before (i.e. - it 1321 * was using the generic driver), we unbind the device 1322 * from the generic driver so that there's a chance a 1323 * real driver could be loaded 1324 */ 1325 if (phydev->mdio.dev.driver == &genphy_10g_driver.mdiodrv.driver || 1326 phydev->mdio.dev.driver == &genphy_driver.mdiodrv.driver) 1327 device_release_driver(&phydev->mdio.dev); 1328 1329 /* 1330 * The phydev might go away on the put_device() below, so avoid 1331 * a use-after-free bug by reading the underlying bus first. 1332 */ 1333 bus = phydev->mdio.bus; 1334 1335 put_device(&phydev->mdio.dev); 1336 if (ndev_owner != bus->owner) 1337 module_put(bus->owner); 1338 1339 /* Assert the reset signal */ 1340 phy_device_reset(phydev, 1); 1341 } 1342 EXPORT_SYMBOL(phy_detach); 1343 1344 int phy_suspend(struct phy_device *phydev) 1345 { 1346 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); 1347 struct net_device *netdev = phydev->attached_dev; 1348 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; 1349 int ret = 0; 1350 1351 /* If the device has WOL enabled, we cannot suspend the PHY */ 1352 phy_ethtool_get_wol(phydev, &wol); 1353 if (wol.wolopts || (netdev && netdev->wol_enabled)) 1354 return -EBUSY; 1355 1356 if (phydev->drv && phydrv->suspend) 1357 ret = phydrv->suspend(phydev); 1358 1359 if (ret) 1360 return ret; 1361 1362 phydev->suspended = true; 1363 1364 return ret; 1365 } 1366 EXPORT_SYMBOL(phy_suspend); 1367 1368 int __phy_resume(struct phy_device *phydev) 1369 { 1370 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); 1371 int ret = 0; 1372 1373 WARN_ON(!mutex_is_locked(&phydev->lock)); 1374 1375 if (phydev->drv && phydrv->resume) 1376 ret = phydrv->resume(phydev); 1377 1378 if (ret) 1379 return ret; 1380 1381 phydev->suspended = false; 1382 1383 return ret; 1384 } 1385 EXPORT_SYMBOL(__phy_resume); 1386 1387 int phy_resume(struct phy_device *phydev) 1388 { 1389 int ret; 1390 1391 mutex_lock(&phydev->lock); 1392 ret = __phy_resume(phydev); 1393 mutex_unlock(&phydev->lock); 1394 1395 return ret; 1396 } 1397 EXPORT_SYMBOL(phy_resume); 1398 1399 int phy_loopback(struct phy_device *phydev, bool enable) 1400 { 1401 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); 1402 int ret = 0; 1403 1404 mutex_lock(&phydev->lock); 1405 1406 if (enable && phydev->loopback_enabled) { 1407 ret = -EBUSY; 1408 goto out; 1409 } 1410 1411 if (!enable && !phydev->loopback_enabled) { 1412 ret = -EINVAL; 1413 goto out; 1414 } 1415 1416 if (phydev->drv && phydrv->set_loopback) 1417 ret = phydrv->set_loopback(phydev, enable); 1418 else 1419 ret = -EOPNOTSUPP; 1420 1421 if (ret) 1422 goto out; 1423 1424 phydev->loopback_enabled = enable; 1425 1426 out: 1427 mutex_unlock(&phydev->lock); 1428 return ret; 1429 } 1430 EXPORT_SYMBOL(phy_loopback); 1431 1432 /** 1433 * phy_reset_after_clk_enable - perform a PHY reset if needed 1434 * @phydev: target phy_device struct 1435 * 1436 * Description: Some PHYs are known to need a reset after their refclk was 1437 * enabled. This function evaluates the flags and perform the reset if it's 1438 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy 1439 * was reset. 1440 */ 1441 int phy_reset_after_clk_enable(struct phy_device *phydev) 1442 { 1443 if (!phydev || !phydev->drv) 1444 return -ENODEV; 1445 1446 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) { 1447 phy_device_reset(phydev, 1); 1448 phy_device_reset(phydev, 0); 1449 return 1; 1450 } 1451 1452 return 0; 1453 } 1454 EXPORT_SYMBOL(phy_reset_after_clk_enable); 1455 1456 /* Generic PHY support and helper functions */ 1457 1458 /** 1459 * genphy_config_advert - sanitize and advertise auto-negotiation parameters 1460 * @phydev: target phy_device struct 1461 * 1462 * Description: Writes MII_ADVERTISE with the appropriate values, 1463 * after sanitizing the values to make sure we only advertise 1464 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement 1465 * hasn't changed, and > 0 if it has changed. 1466 */ 1467 static int genphy_config_advert(struct phy_device *phydev) 1468 { 1469 u32 advertise; 1470 int oldadv, adv, bmsr; 1471 int err, changed = 0; 1472 1473 /* Only allow advertising what this PHY supports */ 1474 linkmode_and(phydev->advertising, phydev->advertising, 1475 phydev->supported); 1476 if (!ethtool_convert_link_mode_to_legacy_u32(&advertise, 1477 phydev->advertising)) 1478 phydev_warn(phydev, "PHY advertising (%*pb) more modes than genphy supports, some modes not advertised.\n", 1479 __ETHTOOL_LINK_MODE_MASK_NBITS, 1480 phydev->advertising); 1481 1482 /* Setup standard advertisement */ 1483 adv = phy_read(phydev, MII_ADVERTISE); 1484 if (adv < 0) 1485 return adv; 1486 1487 oldadv = adv; 1488 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | 1489 ADVERTISE_PAUSE_ASYM); 1490 adv |= ethtool_adv_to_mii_adv_t(advertise); 1491 1492 if (adv != oldadv) { 1493 err = phy_write(phydev, MII_ADVERTISE, adv); 1494 1495 if (err < 0) 1496 return err; 1497 changed = 1; 1498 } 1499 1500 bmsr = phy_read(phydev, MII_BMSR); 1501 if (bmsr < 0) 1502 return bmsr; 1503 1504 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all 1505 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a 1506 * logical 1. 1507 */ 1508 if (!(bmsr & BMSR_ESTATEN)) 1509 return changed; 1510 1511 /* Configure gigabit if it's supported */ 1512 adv = phy_read(phydev, MII_CTRL1000); 1513 if (adv < 0) 1514 return adv; 1515 1516 oldadv = adv; 1517 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF); 1518 1519 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 1520 phydev->supported) || 1521 linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 1522 phydev->supported)) 1523 adv |= ethtool_adv_to_mii_ctrl1000_t(advertise); 1524 1525 if (adv != oldadv) 1526 changed = 1; 1527 1528 err = phy_write(phydev, MII_CTRL1000, adv); 1529 if (err < 0) 1530 return err; 1531 1532 return changed; 1533 } 1534 1535 /** 1536 * genphy_config_eee_advert - disable unwanted eee mode advertisement 1537 * @phydev: target phy_device struct 1538 * 1539 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy 1540 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't 1541 * changed, and 1 if it has changed. 1542 */ 1543 static int genphy_config_eee_advert(struct phy_device *phydev) 1544 { 1545 int broken = phydev->eee_broken_modes; 1546 int old_adv, adv; 1547 1548 /* Nothing to disable */ 1549 if (!broken) 1550 return 0; 1551 1552 /* If the following call fails, we assume that EEE is not 1553 * supported by the phy. If we read 0, EEE is not advertised 1554 * In both case, we don't need to continue 1555 */ 1556 adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); 1557 if (adv <= 0) 1558 return 0; 1559 1560 old_adv = adv; 1561 adv &= ~broken; 1562 1563 /* Advertising remains unchanged with the broken mask */ 1564 if (old_adv == adv) 1565 return 0; 1566 1567 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv); 1568 1569 return 1; 1570 } 1571 1572 /** 1573 * genphy_setup_forced - configures/forces speed/duplex from @phydev 1574 * @phydev: target phy_device struct 1575 * 1576 * Description: Configures MII_BMCR to force speed/duplex 1577 * to the values in phydev. Assumes that the values are valid. 1578 * Please see phy_sanitize_settings(). 1579 */ 1580 int genphy_setup_forced(struct phy_device *phydev) 1581 { 1582 u16 ctl = 0; 1583 1584 phydev->pause = 0; 1585 phydev->asym_pause = 0; 1586 1587 if (SPEED_1000 == phydev->speed) 1588 ctl |= BMCR_SPEED1000; 1589 else if (SPEED_100 == phydev->speed) 1590 ctl |= BMCR_SPEED100; 1591 1592 if (DUPLEX_FULL == phydev->duplex) 1593 ctl |= BMCR_FULLDPLX; 1594 1595 return phy_modify(phydev, MII_BMCR, 1596 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl); 1597 } 1598 EXPORT_SYMBOL(genphy_setup_forced); 1599 1600 /** 1601 * genphy_restart_aneg - Enable and Restart Autonegotiation 1602 * @phydev: target phy_device struct 1603 */ 1604 int genphy_restart_aneg(struct phy_device *phydev) 1605 { 1606 /* Don't isolate the PHY if we're negotiating */ 1607 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, 1608 BMCR_ANENABLE | BMCR_ANRESTART); 1609 } 1610 EXPORT_SYMBOL(genphy_restart_aneg); 1611 1612 /** 1613 * genphy_config_aneg - restart auto-negotiation or write BMCR 1614 * @phydev: target phy_device struct 1615 * 1616 * Description: If auto-negotiation is enabled, we configure the 1617 * advertising, and then restart auto-negotiation. If it is not 1618 * enabled, then we write the BMCR. 1619 */ 1620 int genphy_config_aneg(struct phy_device *phydev) 1621 { 1622 int err, changed; 1623 1624 changed = genphy_config_eee_advert(phydev); 1625 1626 if (AUTONEG_ENABLE != phydev->autoneg) 1627 return genphy_setup_forced(phydev); 1628 1629 err = genphy_config_advert(phydev); 1630 if (err < 0) /* error */ 1631 return err; 1632 1633 changed |= err; 1634 1635 if (changed == 0) { 1636 /* Advertisement hasn't changed, but maybe aneg was never on to 1637 * begin with? Or maybe phy was isolated? 1638 */ 1639 int ctl = phy_read(phydev, MII_BMCR); 1640 1641 if (ctl < 0) 1642 return ctl; 1643 1644 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) 1645 changed = 1; /* do restart aneg */ 1646 } 1647 1648 /* Only restart aneg if we are advertising something different 1649 * than we were before. 1650 */ 1651 if (changed > 0) 1652 return genphy_restart_aneg(phydev); 1653 1654 return 0; 1655 } 1656 EXPORT_SYMBOL(genphy_config_aneg); 1657 1658 /** 1659 * genphy_aneg_done - return auto-negotiation status 1660 * @phydev: target phy_device struct 1661 * 1662 * Description: Reads the status register and returns 0 either if 1663 * auto-negotiation is incomplete, or if there was an error. 1664 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. 1665 */ 1666 int genphy_aneg_done(struct phy_device *phydev) 1667 { 1668 int retval = phy_read(phydev, MII_BMSR); 1669 1670 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); 1671 } 1672 EXPORT_SYMBOL(genphy_aneg_done); 1673 1674 /** 1675 * genphy_update_link - update link status in @phydev 1676 * @phydev: target phy_device struct 1677 * 1678 * Description: Update the value in phydev->link to reflect the 1679 * current link value. In order to do this, we need to read 1680 * the status register twice, keeping the second value. 1681 */ 1682 int genphy_update_link(struct phy_device *phydev) 1683 { 1684 int status; 1685 1686 /* Do a fake read */ 1687 status = phy_read(phydev, MII_BMSR); 1688 if (status < 0) 1689 return status; 1690 1691 /* Read link and autonegotiation status */ 1692 status = phy_read(phydev, MII_BMSR); 1693 if (status < 0) 1694 return status; 1695 1696 if ((status & BMSR_LSTATUS) == 0) 1697 phydev->link = 0; 1698 else 1699 phydev->link = 1; 1700 1701 return 0; 1702 } 1703 EXPORT_SYMBOL(genphy_update_link); 1704 1705 /** 1706 * genphy_read_status - check the link status and update current link state 1707 * @phydev: target phy_device struct 1708 * 1709 * Description: Check the link, then figure out the current state 1710 * by comparing what we advertise with what the link partner 1711 * advertises. Start by checking the gigabit possibilities, 1712 * then move on to 10/100. 1713 */ 1714 int genphy_read_status(struct phy_device *phydev) 1715 { 1716 int adv; 1717 int err; 1718 int lpa; 1719 int lpagb = 0; 1720 int common_adv; 1721 int common_adv_gb = 0; 1722 1723 /* Update the link, but return if there was an error */ 1724 err = genphy_update_link(phydev); 1725 if (err) 1726 return err; 1727 1728 linkmode_zero(phydev->lp_advertising); 1729 1730 if (AUTONEG_ENABLE == phydev->autoneg) { 1731 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 1732 phydev->supported) || 1733 linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 1734 phydev->supported)) { 1735 lpagb = phy_read(phydev, MII_STAT1000); 1736 if (lpagb < 0) 1737 return lpagb; 1738 1739 adv = phy_read(phydev, MII_CTRL1000); 1740 if (adv < 0) 1741 return adv; 1742 1743 if (lpagb & LPA_1000MSFAIL) { 1744 if (adv & CTL1000_ENABLE_MASTER) 1745 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n"); 1746 else 1747 phydev_err(phydev, "Master/Slave resolution failed\n"); 1748 return -ENOLINK; 1749 } 1750 1751 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, 1752 lpagb); 1753 common_adv_gb = lpagb & adv << 2; 1754 } 1755 1756 lpa = phy_read(phydev, MII_LPA); 1757 if (lpa < 0) 1758 return lpa; 1759 1760 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa); 1761 1762 adv = phy_read(phydev, MII_ADVERTISE); 1763 if (adv < 0) 1764 return adv; 1765 1766 common_adv = lpa & adv; 1767 1768 phydev->speed = SPEED_10; 1769 phydev->duplex = DUPLEX_HALF; 1770 phydev->pause = 0; 1771 phydev->asym_pause = 0; 1772 1773 if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) { 1774 phydev->speed = SPEED_1000; 1775 1776 if (common_adv_gb & LPA_1000FULL) 1777 phydev->duplex = DUPLEX_FULL; 1778 } else if (common_adv & (LPA_100FULL | LPA_100HALF)) { 1779 phydev->speed = SPEED_100; 1780 1781 if (common_adv & LPA_100FULL) 1782 phydev->duplex = DUPLEX_FULL; 1783 } else 1784 if (common_adv & LPA_10FULL) 1785 phydev->duplex = DUPLEX_FULL; 1786 1787 if (phydev->duplex == DUPLEX_FULL) { 1788 phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; 1789 phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; 1790 } 1791 } else { 1792 int bmcr = phy_read(phydev, MII_BMCR); 1793 1794 if (bmcr < 0) 1795 return bmcr; 1796 1797 if (bmcr & BMCR_FULLDPLX) 1798 phydev->duplex = DUPLEX_FULL; 1799 else 1800 phydev->duplex = DUPLEX_HALF; 1801 1802 if (bmcr & BMCR_SPEED1000) 1803 phydev->speed = SPEED_1000; 1804 else if (bmcr & BMCR_SPEED100) 1805 phydev->speed = SPEED_100; 1806 else 1807 phydev->speed = SPEED_10; 1808 1809 phydev->pause = 0; 1810 phydev->asym_pause = 0; 1811 } 1812 1813 return 0; 1814 } 1815 EXPORT_SYMBOL(genphy_read_status); 1816 1817 /** 1818 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit 1819 * @phydev: target phy_device struct 1820 * 1821 * Description: Perform a software PHY reset using the standard 1822 * BMCR_RESET bit and poll for the reset bit to be cleared. 1823 * 1824 * Returns: 0 on success, < 0 on failure 1825 */ 1826 int genphy_soft_reset(struct phy_device *phydev) 1827 { 1828 int ret; 1829 1830 ret = phy_write(phydev, MII_BMCR, BMCR_RESET); 1831 if (ret < 0) 1832 return ret; 1833 1834 return phy_poll_reset(phydev); 1835 } 1836 EXPORT_SYMBOL(genphy_soft_reset); 1837 1838 int genphy_config_init(struct phy_device *phydev) 1839 { 1840 int val; 1841 __ETHTOOL_DECLARE_LINK_MODE_MASK(features) = { 0, }; 1842 1843 linkmode_set_bit_array(phy_basic_ports_array, 1844 ARRAY_SIZE(phy_basic_ports_array), 1845 features); 1846 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, features); 1847 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, features); 1848 1849 /* Do we support autonegotiation? */ 1850 val = phy_read(phydev, MII_BMSR); 1851 if (val < 0) 1852 return val; 1853 1854 if (val & BMSR_ANEGCAPABLE) 1855 linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, features); 1856 1857 if (val & BMSR_100FULL) 1858 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, features); 1859 if (val & BMSR_100HALF) 1860 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, features); 1861 if (val & BMSR_10FULL) 1862 linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, features); 1863 if (val & BMSR_10HALF) 1864 linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, features); 1865 1866 if (val & BMSR_ESTATEN) { 1867 val = phy_read(phydev, MII_ESTATUS); 1868 if (val < 0) 1869 return val; 1870 1871 if (val & ESTATUS_1000_TFULL) 1872 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 1873 features); 1874 if (val & ESTATUS_1000_THALF) 1875 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 1876 features); 1877 } 1878 1879 linkmode_and(phydev->supported, phydev->supported, features); 1880 linkmode_and(phydev->advertising, phydev->advertising, features); 1881 1882 return 0; 1883 } 1884 EXPORT_SYMBOL(genphy_config_init); 1885 1886 /* This is used for the phy device which doesn't support the MMD extended 1887 * register access, but it does have side effect when we are trying to access 1888 * the MMD register via indirect method. 1889 */ 1890 int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum) 1891 { 1892 return -EOPNOTSUPP; 1893 } 1894 EXPORT_SYMBOL(genphy_read_mmd_unsupported); 1895 1896 int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum, 1897 u16 regnum, u16 val) 1898 { 1899 return -EOPNOTSUPP; 1900 } 1901 EXPORT_SYMBOL(genphy_write_mmd_unsupported); 1902 1903 int genphy_suspend(struct phy_device *phydev) 1904 { 1905 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN); 1906 } 1907 EXPORT_SYMBOL(genphy_suspend); 1908 1909 int genphy_resume(struct phy_device *phydev) 1910 { 1911 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN); 1912 } 1913 EXPORT_SYMBOL(genphy_resume); 1914 1915 int genphy_loopback(struct phy_device *phydev, bool enable) 1916 { 1917 return phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 1918 enable ? BMCR_LOOPBACK : 0); 1919 } 1920 EXPORT_SYMBOL(genphy_loopback); 1921 1922 static int __set_phy_supported(struct phy_device *phydev, u32 max_speed) 1923 { 1924 switch (max_speed) { 1925 case SPEED_10: 1926 linkmode_clear_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, 1927 phydev->supported); 1928 linkmode_clear_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, 1929 phydev->supported); 1930 /* fall through */ 1931 case SPEED_100: 1932 linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 1933 phydev->supported); 1934 linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, 1935 phydev->supported); 1936 break; 1937 case SPEED_1000: 1938 break; 1939 default: 1940 return -ENOTSUPP; 1941 } 1942 1943 return 0; 1944 } 1945 1946 int phy_set_max_speed(struct phy_device *phydev, u32 max_speed) 1947 { 1948 int err; 1949 1950 err = __set_phy_supported(phydev, max_speed); 1951 if (err) 1952 return err; 1953 1954 linkmode_copy(phydev->advertising, phydev->supported); 1955 1956 return 0; 1957 } 1958 EXPORT_SYMBOL(phy_set_max_speed); 1959 1960 /** 1961 * phy_remove_link_mode - Remove a supported link mode 1962 * @phydev: phy_device structure to remove link mode from 1963 * @link_mode: Link mode to be removed 1964 * 1965 * Description: Some MACs don't support all link modes which the PHY 1966 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper 1967 * to remove a link mode. 1968 */ 1969 void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode) 1970 { 1971 linkmode_clear_bit(link_mode, phydev->supported); 1972 linkmode_copy(phydev->advertising, phydev->supported); 1973 } 1974 EXPORT_SYMBOL(phy_remove_link_mode); 1975 1976 /** 1977 * phy_support_sym_pause - Enable support of symmetrical pause 1978 * @phydev: target phy_device struct 1979 * 1980 * Description: Called by the MAC to indicate is supports symmetrical 1981 * Pause, but not asym pause. 1982 */ 1983 void phy_support_sym_pause(struct phy_device *phydev) 1984 { 1985 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported); 1986 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported); 1987 linkmode_copy(phydev->advertising, phydev->supported); 1988 } 1989 EXPORT_SYMBOL(phy_support_sym_pause); 1990 1991 /** 1992 * phy_support_asym_pause - Enable support of asym pause 1993 * @phydev: target phy_device struct 1994 * 1995 * Description: Called by the MAC to indicate is supports Asym Pause. 1996 */ 1997 void phy_support_asym_pause(struct phy_device *phydev) 1998 { 1999 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported); 2000 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported); 2001 linkmode_copy(phydev->advertising, phydev->supported); 2002 } 2003 EXPORT_SYMBOL(phy_support_asym_pause); 2004 2005 /** 2006 * phy_set_sym_pause - Configure symmetric Pause 2007 * @phydev: target phy_device struct 2008 * @rx: Receiver Pause is supported 2009 * @tx: Transmit Pause is supported 2010 * @autoneg: Auto neg should be used 2011 * 2012 * Description: Configure advertised Pause support depending on if 2013 * receiver pause and pause auto neg is supported. Generally called 2014 * from the set_pauseparam .ndo. 2015 */ 2016 void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx, 2017 bool autoneg) 2018 { 2019 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported); 2020 2021 if (rx && tx && autoneg) 2022 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2023 phydev->supported); 2024 2025 linkmode_copy(phydev->advertising, phydev->supported); 2026 } 2027 EXPORT_SYMBOL(phy_set_sym_pause); 2028 2029 /** 2030 * phy_set_asym_pause - Configure Pause and Asym Pause 2031 * @phydev: target phy_device struct 2032 * @rx: Receiver Pause is supported 2033 * @tx: Transmit Pause is supported 2034 * 2035 * Description: Configure advertised Pause support depending on if 2036 * transmit and receiver pause is supported. If there has been a 2037 * change in adverting, trigger a new autoneg. Generally called from 2038 * the set_pauseparam .ndo. 2039 */ 2040 void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx) 2041 { 2042 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv); 2043 2044 linkmode_copy(oldadv, phydev->advertising); 2045 2046 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2047 phydev->advertising); 2048 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2049 phydev->advertising); 2050 2051 if (rx) { 2052 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2053 phydev->advertising); 2054 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2055 phydev->advertising); 2056 } 2057 2058 if (tx) 2059 linkmode_change_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2060 phydev->advertising); 2061 2062 if (!linkmode_equal(oldadv, phydev->advertising) && 2063 phydev->autoneg) 2064 phy_start_aneg(phydev); 2065 } 2066 EXPORT_SYMBOL(phy_set_asym_pause); 2067 2068 /** 2069 * phy_validate_pause - Test if the PHY/MAC support the pause configuration 2070 * @phydev: phy_device struct 2071 * @pp: requested pause configuration 2072 * 2073 * Description: Test if the PHY/MAC combination supports the Pause 2074 * configuration the user is requesting. Returns True if it is 2075 * supported, false otherwise. 2076 */ 2077 bool phy_validate_pause(struct phy_device *phydev, 2078 struct ethtool_pauseparam *pp) 2079 { 2080 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2081 phydev->supported) || 2082 (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2083 phydev->supported) && 2084 pp->rx_pause != pp->tx_pause)) 2085 return false; 2086 return true; 2087 } 2088 EXPORT_SYMBOL(phy_validate_pause); 2089 2090 static void of_set_phy_supported(struct phy_device *phydev) 2091 { 2092 struct device_node *node = phydev->mdio.dev.of_node; 2093 u32 max_speed; 2094 2095 if (!IS_ENABLED(CONFIG_OF_MDIO)) 2096 return; 2097 2098 if (!node) 2099 return; 2100 2101 if (!of_property_read_u32(node, "max-speed", &max_speed)) 2102 __set_phy_supported(phydev, max_speed); 2103 } 2104 2105 static void of_set_phy_eee_broken(struct phy_device *phydev) 2106 { 2107 struct device_node *node = phydev->mdio.dev.of_node; 2108 u32 broken = 0; 2109 2110 if (!IS_ENABLED(CONFIG_OF_MDIO)) 2111 return; 2112 2113 if (!node) 2114 return; 2115 2116 if (of_property_read_bool(node, "eee-broken-100tx")) 2117 broken |= MDIO_EEE_100TX; 2118 if (of_property_read_bool(node, "eee-broken-1000t")) 2119 broken |= MDIO_EEE_1000T; 2120 if (of_property_read_bool(node, "eee-broken-10gt")) 2121 broken |= MDIO_EEE_10GT; 2122 if (of_property_read_bool(node, "eee-broken-1000kx")) 2123 broken |= MDIO_EEE_1000KX; 2124 if (of_property_read_bool(node, "eee-broken-10gkx4")) 2125 broken |= MDIO_EEE_10GKX4; 2126 if (of_property_read_bool(node, "eee-broken-10gkr")) 2127 broken |= MDIO_EEE_10GKR; 2128 2129 phydev->eee_broken_modes = broken; 2130 } 2131 2132 static bool phy_drv_supports_irq(struct phy_driver *phydrv) 2133 { 2134 return phydrv->config_intr && phydrv->ack_interrupt; 2135 } 2136 2137 /** 2138 * phy_probe - probe and init a PHY device 2139 * @dev: device to probe and init 2140 * 2141 * Description: Take care of setting up the phy_device structure, 2142 * set the state to READY (the driver's init function should 2143 * set it to STARTING if needed). 2144 */ 2145 static int phy_probe(struct device *dev) 2146 { 2147 struct phy_device *phydev = to_phy_device(dev); 2148 struct device_driver *drv = phydev->mdio.dev.driver; 2149 struct phy_driver *phydrv = to_phy_driver(drv); 2150 int err = 0; 2151 2152 phydev->drv = phydrv; 2153 2154 /* Disable the interrupt if the PHY doesn't support it 2155 * but the interrupt is still a valid one 2156 */ 2157 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev)) 2158 phydev->irq = PHY_POLL; 2159 2160 if (phydrv->flags & PHY_IS_INTERNAL) 2161 phydev->is_internal = true; 2162 2163 mutex_lock(&phydev->lock); 2164 2165 /* Start out supporting everything. Eventually, 2166 * a controller will attach, and may modify one 2167 * or both of these values 2168 */ 2169 linkmode_copy(phydev->supported, phydrv->features); 2170 of_set_phy_supported(phydev); 2171 linkmode_copy(phydev->advertising, phydev->supported); 2172 2173 /* Get the EEE modes we want to prohibit. We will ask 2174 * the PHY stop advertising these mode later on 2175 */ 2176 of_set_phy_eee_broken(phydev); 2177 2178 /* The Pause Frame bits indicate that the PHY can support passing 2179 * pause frames. During autonegotiation, the PHYs will determine if 2180 * they should allow pause frames to pass. The MAC driver should then 2181 * use that result to determine whether to enable flow control via 2182 * pause frames. 2183 * 2184 * Normally, PHY drivers should not set the Pause bits, and instead 2185 * allow phylib to do that. However, there may be some situations 2186 * (e.g. hardware erratum) where the driver wants to set only one 2187 * of these bits. 2188 */ 2189 if (test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydrv->features) || 2190 test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydrv->features)) { 2191 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2192 phydev->supported); 2193 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2194 phydev->supported); 2195 if (test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydrv->features)) 2196 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2197 phydev->supported); 2198 if (test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2199 phydrv->features)) 2200 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2201 phydev->supported); 2202 } else { 2203 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2204 phydev->supported); 2205 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2206 phydev->supported); 2207 } 2208 2209 /* Set the state to READY by default */ 2210 phydev->state = PHY_READY; 2211 2212 if (phydev->drv->probe) { 2213 /* Deassert the reset signal */ 2214 phy_device_reset(phydev, 0); 2215 2216 err = phydev->drv->probe(phydev); 2217 if (err) { 2218 /* Assert the reset signal */ 2219 phy_device_reset(phydev, 1); 2220 } 2221 } 2222 2223 mutex_unlock(&phydev->lock); 2224 2225 return err; 2226 } 2227 2228 static int phy_remove(struct device *dev) 2229 { 2230 struct phy_device *phydev = to_phy_device(dev); 2231 2232 cancel_delayed_work_sync(&phydev->state_queue); 2233 2234 mutex_lock(&phydev->lock); 2235 phydev->state = PHY_DOWN; 2236 mutex_unlock(&phydev->lock); 2237 2238 if (phydev->drv && phydev->drv->remove) { 2239 phydev->drv->remove(phydev); 2240 2241 /* Assert the reset signal */ 2242 phy_device_reset(phydev, 1); 2243 } 2244 phydev->drv = NULL; 2245 2246 return 0; 2247 } 2248 2249 /** 2250 * phy_driver_register - register a phy_driver with the PHY layer 2251 * @new_driver: new phy_driver to register 2252 * @owner: module owning this PHY 2253 */ 2254 int phy_driver_register(struct phy_driver *new_driver, struct module *owner) 2255 { 2256 int retval; 2257 2258 if (WARN_ON(!new_driver->features)) { 2259 pr_err("%s: Driver features are missing\n", new_driver->name); 2260 return -EINVAL; 2261 } 2262 2263 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY; 2264 new_driver->mdiodrv.driver.name = new_driver->name; 2265 new_driver->mdiodrv.driver.bus = &mdio_bus_type; 2266 new_driver->mdiodrv.driver.probe = phy_probe; 2267 new_driver->mdiodrv.driver.remove = phy_remove; 2268 new_driver->mdiodrv.driver.owner = owner; 2269 2270 /* The following works around an issue where the PHY driver doesn't bind 2271 * to the device, resulting in the genphy driver being used instead of 2272 * the dedicated driver. The root cause of the issue isn't known yet 2273 * and seems to be in the base driver core. Once this is fixed we may 2274 * remove this workaround. 2275 */ 2276 new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS; 2277 2278 retval = driver_register(&new_driver->mdiodrv.driver); 2279 if (retval) { 2280 pr_err("%s: Error %d in registering driver\n", 2281 new_driver->name, retval); 2282 2283 return retval; 2284 } 2285 2286 pr_debug("%s: Registered new driver\n", new_driver->name); 2287 2288 return 0; 2289 } 2290 EXPORT_SYMBOL(phy_driver_register); 2291 2292 int phy_drivers_register(struct phy_driver *new_driver, int n, 2293 struct module *owner) 2294 { 2295 int i, ret = 0; 2296 2297 for (i = 0; i < n; i++) { 2298 ret = phy_driver_register(new_driver + i, owner); 2299 if (ret) { 2300 while (i-- > 0) 2301 phy_driver_unregister(new_driver + i); 2302 break; 2303 } 2304 } 2305 return ret; 2306 } 2307 EXPORT_SYMBOL(phy_drivers_register); 2308 2309 void phy_driver_unregister(struct phy_driver *drv) 2310 { 2311 driver_unregister(&drv->mdiodrv.driver); 2312 } 2313 EXPORT_SYMBOL(phy_driver_unregister); 2314 2315 void phy_drivers_unregister(struct phy_driver *drv, int n) 2316 { 2317 int i; 2318 2319 for (i = 0; i < n; i++) 2320 phy_driver_unregister(drv + i); 2321 } 2322 EXPORT_SYMBOL(phy_drivers_unregister); 2323 2324 static struct phy_driver genphy_driver = { 2325 .phy_id = 0xffffffff, 2326 .phy_id_mask = 0xffffffff, 2327 .name = "Generic PHY", 2328 .soft_reset = genphy_no_soft_reset, 2329 .config_init = genphy_config_init, 2330 .features = PHY_GBIT_ALL_PORTS_FEATURES, 2331 .aneg_done = genphy_aneg_done, 2332 .suspend = genphy_suspend, 2333 .resume = genphy_resume, 2334 .set_loopback = genphy_loopback, 2335 }; 2336 2337 static int __init phy_init(void) 2338 { 2339 int rc; 2340 2341 rc = mdio_bus_init(); 2342 if (rc) 2343 return rc; 2344 2345 features_init(); 2346 2347 rc = phy_driver_register(&genphy_10g_driver, THIS_MODULE); 2348 if (rc) 2349 goto err_10g; 2350 2351 rc = phy_driver_register(&genphy_driver, THIS_MODULE); 2352 if (rc) { 2353 phy_driver_unregister(&genphy_10g_driver); 2354 err_10g: 2355 mdio_bus_exit(); 2356 } 2357 2358 return rc; 2359 } 2360 2361 static void __exit phy_exit(void) 2362 { 2363 phy_driver_unregister(&genphy_10g_driver); 2364 phy_driver_unregister(&genphy_driver); 2365 mdio_bus_exit(); 2366 } 2367 2368 subsys_initcall(phy_init); 2369 module_exit(phy_exit); 2370