xf.li | ed996a2 | 2025-03-13 23:49:05 -0700 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* Framework for finding and configuring PHYs. |
| 3 | * Also contains generic PHY driver |
| 4 | * |
| 5 | * Author: Andy Fleming |
| 6 | * |
| 7 | * Copyright (c) 2004 Freescale Semiconductor, Inc. |
| 8 | */ |
| 9 | |
| 10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 11 | |
| 12 | #include <linux/bitmap.h> |
| 13 | #include <linux/delay.h> |
| 14 | #include <linux/errno.h> |
| 15 | #include <linux/etherdevice.h> |
| 16 | #include <linux/ethtool.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/interrupt.h> |
| 19 | #include <linux/io.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/mdio.h> |
| 22 | #include <linux/mii.h> |
| 23 | #include <linux/mm.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/netdevice.h> |
| 26 | #include <linux/phy.h> |
| 27 | #include <linux/phy_led_triggers.h> |
| 28 | #include <linux/property.h> |
| 29 | #include <linux/sfp.h> |
| 30 | #include <linux/skbuff.h> |
| 31 | #include <linux/slab.h> |
| 32 | #include <linux/string.h> |
| 33 | #include <linux/uaccess.h> |
| 34 | #include <linux/unistd.h> |
| 35 | |
| 36 | MODULE_DESCRIPTION("PHY library"); |
| 37 | MODULE_AUTHOR("Andy Fleming"); |
| 38 | MODULE_LICENSE("GPL"); |
| 39 | |
| 40 | __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_features) __ro_after_init; |
| 41 | EXPORT_SYMBOL_GPL(phy_basic_features); |
| 42 | |
| 43 | __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1_features) __ro_after_init; |
| 44 | EXPORT_SYMBOL_GPL(phy_basic_t1_features); |
| 45 | |
| 46 | __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_features) __ro_after_init; |
| 47 | EXPORT_SYMBOL_GPL(phy_gbit_features); |
| 48 | |
| 49 | __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_fibre_features) __ro_after_init; |
| 50 | EXPORT_SYMBOL_GPL(phy_gbit_fibre_features); |
| 51 | |
| 52 | __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_all_ports_features) __ro_after_init; |
| 53 | EXPORT_SYMBOL_GPL(phy_gbit_all_ports_features); |
| 54 | |
| 55 | __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_features) __ro_after_init; |
| 56 | EXPORT_SYMBOL_GPL(phy_10gbit_features); |
| 57 | |
| 58 | __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_fec_features) __ro_after_init; |
| 59 | EXPORT_SYMBOL_GPL(phy_10gbit_fec_features); |
| 60 | |
| 61 | const int phy_basic_ports_array[3] = { |
| 62 | ETHTOOL_LINK_MODE_Autoneg_BIT, |
| 63 | ETHTOOL_LINK_MODE_TP_BIT, |
| 64 | ETHTOOL_LINK_MODE_MII_BIT, |
| 65 | }; |
| 66 | EXPORT_SYMBOL_GPL(phy_basic_ports_array); |
| 67 | |
| 68 | const int phy_fibre_port_array[1] = { |
| 69 | ETHTOOL_LINK_MODE_FIBRE_BIT, |
| 70 | }; |
| 71 | EXPORT_SYMBOL_GPL(phy_fibre_port_array); |
| 72 | |
| 73 | const int phy_all_ports_features_array[7] = { |
| 74 | ETHTOOL_LINK_MODE_Autoneg_BIT, |
| 75 | ETHTOOL_LINK_MODE_TP_BIT, |
| 76 | ETHTOOL_LINK_MODE_MII_BIT, |
| 77 | ETHTOOL_LINK_MODE_FIBRE_BIT, |
| 78 | ETHTOOL_LINK_MODE_AUI_BIT, |
| 79 | ETHTOOL_LINK_MODE_BNC_BIT, |
| 80 | ETHTOOL_LINK_MODE_Backplane_BIT, |
| 81 | }; |
| 82 | EXPORT_SYMBOL_GPL(phy_all_ports_features_array); |
| 83 | |
| 84 | const int phy_10_100_features_array[4] = { |
| 85 | ETHTOOL_LINK_MODE_10baseT_Half_BIT, |
| 86 | ETHTOOL_LINK_MODE_10baseT_Full_BIT, |
| 87 | ETHTOOL_LINK_MODE_100baseT_Half_BIT, |
| 88 | ETHTOOL_LINK_MODE_100baseT_Full_BIT, |
| 89 | }; |
| 90 | EXPORT_SYMBOL_GPL(phy_10_100_features_array); |
| 91 | |
| 92 | const int phy_basic_t1_features_array[2] = { |
| 93 | ETHTOOL_LINK_MODE_TP_BIT, |
| 94 | ETHTOOL_LINK_MODE_100baseT1_Full_BIT, |
| 95 | }; |
| 96 | EXPORT_SYMBOL_GPL(phy_basic_t1_features_array); |
| 97 | |
| 98 | const int phy_gbit_features_array[2] = { |
| 99 | ETHTOOL_LINK_MODE_1000baseT_Half_BIT, |
| 100 | ETHTOOL_LINK_MODE_1000baseT_Full_BIT, |
| 101 | }; |
| 102 | EXPORT_SYMBOL_GPL(phy_gbit_features_array); |
| 103 | |
| 104 | const int phy_10gbit_features_array[1] = { |
| 105 | ETHTOOL_LINK_MODE_10000baseT_Full_BIT, |
| 106 | }; |
| 107 | EXPORT_SYMBOL_GPL(phy_10gbit_features_array); |
| 108 | |
| 109 | static const int phy_10gbit_fec_features_array[1] = { |
| 110 | ETHTOOL_LINK_MODE_10000baseR_FEC_BIT, |
| 111 | }; |
| 112 | |
| 113 | __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_full_features) __ro_after_init; |
| 114 | EXPORT_SYMBOL_GPL(phy_10gbit_full_features); |
| 115 | |
| 116 | static const int phy_10gbit_full_features_array[] = { |
| 117 | ETHTOOL_LINK_MODE_10baseT_Full_BIT, |
| 118 | ETHTOOL_LINK_MODE_100baseT_Full_BIT, |
| 119 | ETHTOOL_LINK_MODE_1000baseT_Full_BIT, |
| 120 | ETHTOOL_LINK_MODE_10000baseT_Full_BIT, |
| 121 | }; |
| 122 | |
| 123 | //status = phy_read_cl(phydev, MII_BMSR); |
| 124 | static int phy_read_cl(struct phy_device *phydev, u32 regnum) |
| 125 | { |
| 126 | int val = 0; |
| 127 | |
| 128 | mdiobus_write(phydev->mdio.bus, phydev->mdio.addr, 0x0d, 1); |
| 129 | mdiobus_write(phydev->mdio.bus, phydev->mdio.addr, 0x0e, regnum); |
| 130 | mdiobus_write(phydev->mdio.bus, phydev->mdio.addr, 0x0d, 0x4000 | 1); |
| 131 | val = mdiobus_read(phydev->mdio.bus, phydev->mdio.addr, 0x0e); |
| 132 | |
| 133 | return val; |
| 134 | } |
| 135 | |
| 136 | static void features_init(void) |
| 137 | { |
| 138 | /* 10/100 half/full*/ |
| 139 | linkmode_set_bit_array(phy_basic_ports_array, |
| 140 | ARRAY_SIZE(phy_basic_ports_array), |
| 141 | phy_basic_features); |
| 142 | linkmode_set_bit_array(phy_10_100_features_array, |
| 143 | ARRAY_SIZE(phy_10_100_features_array), |
| 144 | phy_basic_features); |
| 145 | |
| 146 | /* 100 full, TP */ |
| 147 | linkmode_set_bit_array(phy_basic_t1_features_array, |
| 148 | ARRAY_SIZE(phy_basic_t1_features_array), |
| 149 | phy_basic_t1_features); |
| 150 | |
| 151 | /* 10/100 half/full + 1000 half/full */ |
| 152 | linkmode_set_bit_array(phy_basic_ports_array, |
| 153 | ARRAY_SIZE(phy_basic_ports_array), |
| 154 | phy_gbit_features); |
| 155 | linkmode_set_bit_array(phy_10_100_features_array, |
| 156 | ARRAY_SIZE(phy_10_100_features_array), |
| 157 | phy_gbit_features); |
| 158 | linkmode_set_bit_array(phy_gbit_features_array, |
| 159 | ARRAY_SIZE(phy_gbit_features_array), |
| 160 | phy_gbit_features); |
| 161 | |
| 162 | /* 10/100 half/full + 1000 half/full + fibre*/ |
| 163 | linkmode_set_bit_array(phy_basic_ports_array, |
| 164 | ARRAY_SIZE(phy_basic_ports_array), |
| 165 | phy_gbit_fibre_features); |
| 166 | linkmode_set_bit_array(phy_10_100_features_array, |
| 167 | ARRAY_SIZE(phy_10_100_features_array), |
| 168 | phy_gbit_fibre_features); |
| 169 | linkmode_set_bit_array(phy_gbit_features_array, |
| 170 | ARRAY_SIZE(phy_gbit_features_array), |
| 171 | phy_gbit_fibre_features); |
| 172 | linkmode_set_bit_array(phy_fibre_port_array, |
| 173 | ARRAY_SIZE(phy_fibre_port_array), |
| 174 | phy_gbit_fibre_features); |
| 175 | |
| 176 | /* 10/100 half/full + 1000 half/full + TP/MII/FIBRE/AUI/BNC/Backplane*/ |
| 177 | linkmode_set_bit_array(phy_all_ports_features_array, |
| 178 | ARRAY_SIZE(phy_all_ports_features_array), |
| 179 | phy_gbit_all_ports_features); |
| 180 | linkmode_set_bit_array(phy_10_100_features_array, |
| 181 | ARRAY_SIZE(phy_10_100_features_array), |
| 182 | phy_gbit_all_ports_features); |
| 183 | linkmode_set_bit_array(phy_gbit_features_array, |
| 184 | ARRAY_SIZE(phy_gbit_features_array), |
| 185 | phy_gbit_all_ports_features); |
| 186 | |
| 187 | /* 10/100 half/full + 1000 half/full + 10G full*/ |
| 188 | linkmode_set_bit_array(phy_all_ports_features_array, |
| 189 | ARRAY_SIZE(phy_all_ports_features_array), |
| 190 | phy_10gbit_features); |
| 191 | linkmode_set_bit_array(phy_10_100_features_array, |
| 192 | ARRAY_SIZE(phy_10_100_features_array), |
| 193 | phy_10gbit_features); |
| 194 | linkmode_set_bit_array(phy_gbit_features_array, |
| 195 | ARRAY_SIZE(phy_gbit_features_array), |
| 196 | phy_10gbit_features); |
| 197 | linkmode_set_bit_array(phy_10gbit_features_array, |
| 198 | ARRAY_SIZE(phy_10gbit_features_array), |
| 199 | phy_10gbit_features); |
| 200 | |
| 201 | /* 10/100/1000/10G full */ |
| 202 | linkmode_set_bit_array(phy_all_ports_features_array, |
| 203 | ARRAY_SIZE(phy_all_ports_features_array), |
| 204 | phy_10gbit_full_features); |
| 205 | linkmode_set_bit_array(phy_10gbit_full_features_array, |
| 206 | ARRAY_SIZE(phy_10gbit_full_features_array), |
| 207 | phy_10gbit_full_features); |
| 208 | /* 10G FEC only */ |
| 209 | linkmode_set_bit_array(phy_10gbit_fec_features_array, |
| 210 | ARRAY_SIZE(phy_10gbit_fec_features_array), |
| 211 | phy_10gbit_fec_features); |
| 212 | } |
| 213 | |
| 214 | void phy_device_free(struct phy_device *phydev) |
| 215 | { |
| 216 | put_device(&phydev->mdio.dev); |
| 217 | } |
| 218 | EXPORT_SYMBOL(phy_device_free); |
| 219 | |
| 220 | static void phy_mdio_device_free(struct mdio_device *mdiodev) |
| 221 | { |
| 222 | struct phy_device *phydev; |
| 223 | |
| 224 | phydev = container_of(mdiodev, struct phy_device, mdio); |
| 225 | phy_device_free(phydev); |
| 226 | } |
| 227 | |
| 228 | static void phy_device_release(struct device *dev) |
| 229 | { |
| 230 | kfree(to_phy_device(dev)); |
| 231 | } |
| 232 | |
| 233 | static void phy_mdio_device_remove(struct mdio_device *mdiodev) |
| 234 | { |
| 235 | struct phy_device *phydev; |
| 236 | |
| 237 | phydev = container_of(mdiodev, struct phy_device, mdio); |
| 238 | phy_device_remove(phydev); |
| 239 | } |
| 240 | |
| 241 | static struct phy_driver genphy_driver; |
| 242 | |
| 243 | static LIST_HEAD(phy_fixup_list); |
| 244 | static DEFINE_MUTEX(phy_fixup_lock); |
| 245 | |
| 246 | static bool mdio_bus_phy_may_suspend(struct phy_device *phydev) |
| 247 | { |
| 248 | struct device_driver *drv = phydev->mdio.dev.driver; |
| 249 | struct phy_driver *phydrv = to_phy_driver(drv); |
| 250 | struct net_device *netdev = phydev->attached_dev; |
| 251 | |
| 252 | if (!drv || !phydrv->suspend) |
| 253 | return false; |
| 254 | |
| 255 | /* PHY not attached? May suspend if the PHY has not already been |
| 256 | * suspended as part of a prior call to phy_disconnect() -> |
| 257 | * phy_detach() -> phy_suspend() because the parent netdev might be the |
| 258 | * MDIO bus driver and clock gated at this point. |
| 259 | */ |
| 260 | if (!netdev) |
| 261 | goto out; |
| 262 | |
| 263 | if (netdev->wol_enabled) |
| 264 | return false; |
| 265 | |
| 266 | /* As long as not all affected network drivers support the |
| 267 | * wol_enabled flag, let's check for hints that WoL is enabled. |
| 268 | * Don't suspend PHY if the attached netdev parent may wake up. |
| 269 | * The parent may point to a PCI device, as in tg3 driver. |
| 270 | */ |
| 271 | if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent)) |
| 272 | return false; |
| 273 | |
| 274 | /* Also don't suspend PHY if the netdev itself may wakeup. This |
| 275 | * is the case for devices w/o underlaying pwr. mgmt. aware bus, |
| 276 | * e.g. SoC devices. |
| 277 | */ |
| 278 | if (device_may_wakeup(&netdev->dev)) |
| 279 | return false; |
| 280 | |
| 281 | out: |
| 282 | return !phydev->suspended; |
| 283 | } |
| 284 | |
| 285 | static __maybe_unused int mdio_bus_phy_suspend(struct device *dev) |
| 286 | { |
| 287 | struct phy_device *phydev = to_phy_device(dev); |
| 288 | |
| 289 | /* We must stop the state machine manually, otherwise it stops out of |
| 290 | * control, possibly with the phydev->lock held. Upon resume, netdev |
| 291 | * may call phy routines that try to grab the same lock, and that may |
| 292 | * lead to a deadlock. |
| 293 | */ |
| 294 | if (phydev->attached_dev && phydev->adjust_link) |
| 295 | phy_stop_machine(phydev); |
| 296 | |
| 297 | if (!mdio_bus_phy_may_suspend(phydev)) |
| 298 | return 0; |
| 299 | |
| 300 | phydev->suspended_by_mdio_bus = 1; |
| 301 | |
| 302 | return phy_suspend(phydev); |
| 303 | } |
| 304 | |
| 305 | static __maybe_unused int mdio_bus_phy_resume(struct device *dev) |
| 306 | { |
| 307 | struct phy_device *phydev = to_phy_device(dev); |
| 308 | int ret; |
| 309 | |
| 310 | if (!phydev->suspended_by_mdio_bus) |
| 311 | goto no_resume; |
| 312 | |
| 313 | phydev->suspended_by_mdio_bus = 0; |
| 314 | |
| 315 | ret = phy_init_hw(phydev); |
| 316 | if (ret < 0) |
| 317 | return ret; |
| 318 | |
| 319 | ret = phy_resume(phydev); |
| 320 | if (ret < 0) |
| 321 | return ret; |
| 322 | no_resume: |
| 323 | if (phydev->attached_dev && phydev->adjust_link) |
| 324 | phy_start_machine(phydev); |
| 325 | |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | static SIMPLE_DEV_PM_OPS(mdio_bus_phy_pm_ops, mdio_bus_phy_suspend, |
| 330 | mdio_bus_phy_resume); |
| 331 | |
| 332 | /** |
| 333 | * phy_register_fixup - creates a new phy_fixup and adds it to the list |
| 334 | * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID) |
| 335 | * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY) |
| 336 | * It can also be PHY_ANY_UID |
| 337 | * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before |
| 338 | * comparison |
| 339 | * @run: The actual code to be run when a matching PHY is found |
| 340 | */ |
| 341 | int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, |
| 342 | int (*run)(struct phy_device *)) |
| 343 | { |
| 344 | struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL); |
| 345 | |
| 346 | if (!fixup) |
| 347 | return -ENOMEM; |
| 348 | |
| 349 | strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id)); |
| 350 | fixup->phy_uid = phy_uid; |
| 351 | fixup->phy_uid_mask = phy_uid_mask; |
| 352 | fixup->run = run; |
| 353 | |
| 354 | mutex_lock(&phy_fixup_lock); |
| 355 | list_add_tail(&fixup->list, &phy_fixup_list); |
| 356 | mutex_unlock(&phy_fixup_lock); |
| 357 | |
| 358 | return 0; |
| 359 | } |
| 360 | EXPORT_SYMBOL(phy_register_fixup); |
| 361 | |
| 362 | /* Registers a fixup to be run on any PHY with the UID in phy_uid */ |
| 363 | int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, |
| 364 | int (*run)(struct phy_device *)) |
| 365 | { |
| 366 | return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run); |
| 367 | } |
| 368 | EXPORT_SYMBOL(phy_register_fixup_for_uid); |
| 369 | |
| 370 | /* Registers a fixup to be run on the PHY with id string bus_id */ |
| 371 | int phy_register_fixup_for_id(const char *bus_id, |
| 372 | int (*run)(struct phy_device *)) |
| 373 | { |
| 374 | return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run); |
| 375 | } |
| 376 | EXPORT_SYMBOL(phy_register_fixup_for_id); |
| 377 | |
| 378 | /** |
| 379 | * phy_unregister_fixup - remove a phy_fixup from the list |
| 380 | * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list |
| 381 | * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list |
| 382 | * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison |
| 383 | */ |
| 384 | int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask) |
| 385 | { |
| 386 | struct list_head *pos, *n; |
| 387 | struct phy_fixup *fixup; |
| 388 | int ret; |
| 389 | |
| 390 | ret = -ENODEV; |
| 391 | |
| 392 | mutex_lock(&phy_fixup_lock); |
| 393 | list_for_each_safe(pos, n, &phy_fixup_list) { |
| 394 | fixup = list_entry(pos, struct phy_fixup, list); |
| 395 | |
| 396 | if ((!strcmp(fixup->bus_id, bus_id)) && |
| 397 | ((fixup->phy_uid & phy_uid_mask) == |
| 398 | (phy_uid & phy_uid_mask))) { |
| 399 | list_del(&fixup->list); |
| 400 | kfree(fixup); |
| 401 | ret = 0; |
| 402 | break; |
| 403 | } |
| 404 | } |
| 405 | mutex_unlock(&phy_fixup_lock); |
| 406 | |
| 407 | return ret; |
| 408 | } |
| 409 | EXPORT_SYMBOL(phy_unregister_fixup); |
| 410 | |
| 411 | /* Unregisters a fixup of any PHY with the UID in phy_uid */ |
| 412 | int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask) |
| 413 | { |
| 414 | return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask); |
| 415 | } |
| 416 | EXPORT_SYMBOL(phy_unregister_fixup_for_uid); |
| 417 | |
| 418 | /* Unregisters a fixup of the PHY with id string bus_id */ |
| 419 | int phy_unregister_fixup_for_id(const char *bus_id) |
| 420 | { |
| 421 | return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff); |
| 422 | } |
| 423 | EXPORT_SYMBOL(phy_unregister_fixup_for_id); |
| 424 | |
| 425 | /* Returns 1 if fixup matches phydev in bus_id and phy_uid. |
| 426 | * Fixups can be set to match any in one or more fields. |
| 427 | */ |
| 428 | static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup) |
| 429 | { |
| 430 | if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0) |
| 431 | if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0) |
| 432 | return 0; |
| 433 | |
| 434 | if ((fixup->phy_uid & fixup->phy_uid_mask) != |
| 435 | (phydev->phy_id & fixup->phy_uid_mask)) |
| 436 | if (fixup->phy_uid != PHY_ANY_UID) |
| 437 | return 0; |
| 438 | |
| 439 | return 1; |
| 440 | } |
| 441 | |
| 442 | /* Runs any matching fixups for this phydev */ |
| 443 | static int phy_scan_fixups(struct phy_device *phydev) |
| 444 | { |
| 445 | struct phy_fixup *fixup; |
| 446 | |
| 447 | mutex_lock(&phy_fixup_lock); |
| 448 | list_for_each_entry(fixup, &phy_fixup_list, list) { |
| 449 | if (phy_needs_fixup(phydev, fixup)) { |
| 450 | int err = fixup->run(phydev); |
| 451 | |
| 452 | if (err < 0) { |
| 453 | mutex_unlock(&phy_fixup_lock); |
| 454 | return err; |
| 455 | } |
| 456 | phydev->has_fixups = true; |
| 457 | } |
| 458 | } |
| 459 | mutex_unlock(&phy_fixup_lock); |
| 460 | |
| 461 | return 0; |
| 462 | } |
| 463 | |
| 464 | static int phy_bus_match(struct device *dev, struct device_driver *drv) |
| 465 | { |
| 466 | struct phy_device *phydev = to_phy_device(dev); |
| 467 | struct phy_driver *phydrv = to_phy_driver(drv); |
| 468 | const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids); |
| 469 | int i; |
| 470 | |
| 471 | if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY)) |
| 472 | return 0; |
| 473 | |
| 474 | if (phydrv->match_phy_device) |
| 475 | return phydrv->match_phy_device(phydev); |
| 476 | |
| 477 | if (phydev->is_c45) { |
| 478 | for (i = 1; i < num_ids; i++) { |
| 479 | if (phydev->c45_ids.device_ids[i] == 0xffffffff) |
| 480 | continue; |
| 481 | |
| 482 | if ((phydrv->phy_id & phydrv->phy_id_mask) == |
| 483 | (phydev->c45_ids.device_ids[i] & |
| 484 | phydrv->phy_id_mask)) |
| 485 | return 1; |
| 486 | } |
| 487 | return 0; |
| 488 | } else { |
| 489 | return (phydrv->phy_id & phydrv->phy_id_mask) == |
| 490 | (phydev->phy_id & phydrv->phy_id_mask); |
| 491 | } |
| 492 | } |
| 493 | |
| 494 | static ssize_t |
| 495 | phy_id_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 496 | { |
| 497 | struct phy_device *phydev = to_phy_device(dev); |
| 498 | |
| 499 | return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id); |
| 500 | } |
| 501 | static DEVICE_ATTR_RO(phy_id); |
| 502 | |
| 503 | static ssize_t |
| 504 | phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 505 | { |
| 506 | struct phy_device *phydev = to_phy_device(dev); |
| 507 | const char *mode = NULL; |
| 508 | |
| 509 | if (phy_is_internal(phydev)) |
| 510 | mode = "internal"; |
| 511 | else |
| 512 | mode = phy_modes(phydev->interface); |
| 513 | |
| 514 | return sprintf(buf, "%s\n", mode); |
| 515 | } |
| 516 | static DEVICE_ATTR_RO(phy_interface); |
| 517 | |
| 518 | static ssize_t |
| 519 | phy_has_fixups_show(struct device *dev, struct device_attribute *attr, |
| 520 | char *buf) |
| 521 | { |
| 522 | struct phy_device *phydev = to_phy_device(dev); |
| 523 | |
| 524 | return sprintf(buf, "%d\n", phydev->has_fixups); |
| 525 | } |
| 526 | static DEVICE_ATTR_RO(phy_has_fixups); |
| 527 | |
| 528 | static struct attribute *phy_dev_attrs[] = { |
| 529 | &dev_attr_phy_id.attr, |
| 530 | &dev_attr_phy_interface.attr, |
| 531 | &dev_attr_phy_has_fixups.attr, |
| 532 | NULL, |
| 533 | }; |
| 534 | ATTRIBUTE_GROUPS(phy_dev); |
| 535 | |
| 536 | static const struct device_type mdio_bus_phy_type = { |
| 537 | .name = "PHY", |
| 538 | .groups = phy_dev_groups, |
| 539 | .release = phy_device_release, |
| 540 | .pm = pm_ptr(&mdio_bus_phy_pm_ops), |
| 541 | }; |
| 542 | |
| 543 | static int phy_request_driver_module(struct phy_device *dev, u32 phy_id) |
| 544 | { |
| 545 | int ret; |
| 546 | |
| 547 | ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, |
| 548 | MDIO_ID_ARGS(phy_id)); |
| 549 | /* We only check for failures in executing the usermode binary, |
| 550 | * not whether a PHY driver module exists for the PHY ID. |
| 551 | * Accept -ENOENT because this may occur in case no initramfs exists, |
| 552 | * then modprobe isn't available. |
| 553 | */ |
| 554 | if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) { |
| 555 | phydev_err(dev, "error %d loading PHY driver module for ID 0x%08lx\n", |
| 556 | ret, (unsigned long)phy_id); |
| 557 | return ret; |
| 558 | } |
| 559 | |
| 560 | return 0; |
| 561 | } |
| 562 | |
| 563 | struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 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 | int ret = 0; |
| 570 | |
| 571 | /* We allocate the device, and initialize the default values */ |
| 572 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 573 | if (!dev) |
| 574 | return ERR_PTR(-ENOMEM); |
| 575 | |
| 576 | mdiodev = &dev->mdio; |
| 577 | mdiodev->dev.parent = &bus->dev; |
| 578 | mdiodev->dev.bus = &mdio_bus_type; |
| 579 | mdiodev->dev.type = &mdio_bus_phy_type; |
| 580 | mdiodev->bus = bus; |
| 581 | mdiodev->bus_match = phy_bus_match; |
| 582 | mdiodev->addr = addr; |
| 583 | mdiodev->flags = MDIO_DEVICE_FLAG_PHY; |
| 584 | mdiodev->device_free = phy_mdio_device_free; |
| 585 | mdiodev->device_remove = phy_mdio_device_remove; |
| 586 | |
| 587 | dev->speed = SPEED_UNKNOWN; |
| 588 | dev->duplex = DUPLEX_UNKNOWN; |
| 589 | dev->pause = 0; |
| 590 | dev->asym_pause = 0; |
| 591 | dev->link = 0; |
| 592 | dev->port = PORT_TP; |
| 593 | dev->interface = PHY_INTERFACE_MODE_GMII; |
| 594 | |
| 595 | dev->autoneg = AUTONEG_ENABLE; |
| 596 | |
| 597 | dev->is_c45 = is_c45; |
| 598 | dev->phy_id = phy_id; |
| 599 | if (c45_ids) |
| 600 | dev->c45_ids = *c45_ids; |
| 601 | dev->irq = bus->irq[addr]; |
| 602 | |
| 603 | dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr); |
| 604 | device_initialize(&mdiodev->dev); |
| 605 | |
| 606 | dev->state = PHY_DOWN; |
| 607 | |
| 608 | mutex_init(&dev->lock); |
| 609 | INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine); |
| 610 | |
| 611 | /* Request the appropriate module unconditionally; don't |
| 612 | * bother trying to do so only if it isn't already loaded, |
| 613 | * because that gets complicated. A hotplug event would have |
| 614 | * done an unconditional modprobe anyway. |
| 615 | * We don't do normal hotplug because it won't work for MDIO |
| 616 | * -- because it relies on the device staying around for long |
| 617 | * enough for the driver to get loaded. With MDIO, the NIC |
| 618 | * driver will get bored and give up as soon as it finds that |
| 619 | * there's no driver _already_ loaded. |
| 620 | */ |
| 621 | if (is_c45 && c45_ids) { |
| 622 | const int num_ids = ARRAY_SIZE(c45_ids->device_ids); |
| 623 | int i; |
| 624 | |
| 625 | for (i = 1; i < num_ids; i++) { |
| 626 | if (c45_ids->device_ids[i] == 0xffffffff) |
| 627 | continue; |
| 628 | |
| 629 | ret = phy_request_driver_module(dev, |
| 630 | c45_ids->device_ids[i]); |
| 631 | if (ret) |
| 632 | break; |
| 633 | } |
| 634 | } else { |
| 635 | ret = phy_request_driver_module(dev, phy_id); |
| 636 | } |
| 637 | |
| 638 | if (ret) { |
| 639 | put_device(&mdiodev->dev); |
| 640 | dev = ERR_PTR(ret); |
| 641 | } |
| 642 | |
| 643 | return dev; |
| 644 | } |
| 645 | EXPORT_SYMBOL(phy_device_create); |
| 646 | |
| 647 | /* phy_c45_probe_present - checks to see if a MMD is present in the package |
| 648 | * @bus: the target MII bus |
| 649 | * @prtad: PHY package address on the MII bus |
| 650 | * @devad: PHY device (MMD) address |
| 651 | * |
| 652 | * Read the MDIO_STAT2 register, and check whether a device is responding |
| 653 | * at this address. |
| 654 | * |
| 655 | * Returns: negative error number on bus access error, zero if no device |
| 656 | * is responding, or positive if a device is present. |
| 657 | */ |
| 658 | static int phy_c45_probe_present(struct mii_bus *bus, int prtad, int devad) |
| 659 | { |
| 660 | int stat2; |
| 661 | |
| 662 | stat2 = mdiobus_c45_read(bus, prtad, devad, MDIO_STAT2); |
| 663 | if (stat2 < 0) |
| 664 | return stat2; |
| 665 | |
| 666 | return (stat2 & MDIO_STAT2_DEVPRST) == MDIO_STAT2_DEVPRST_VAL; |
| 667 | } |
| 668 | |
| 669 | /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers. |
| 670 | * @bus: the target MII bus |
| 671 | * @addr: PHY address on the MII bus |
| 672 | * @dev_addr: MMD address in the PHY. |
| 673 | * @devices_in_package: where to store the devices in package information. |
| 674 | * |
| 675 | * Description: reads devices in package registers of a MMD at @dev_addr |
| 676 | * from PHY at @addr on @bus. |
| 677 | * |
| 678 | * Returns: 0 on success, -EIO on failure. |
| 679 | */ |
| 680 | static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr, |
| 681 | u32 *devices_in_package) |
| 682 | { |
| 683 | int phy_reg; |
| 684 | |
| 685 | phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS2); |
| 686 | if (phy_reg < 0) |
| 687 | return -EIO; |
| 688 | *devices_in_package = phy_reg << 16; |
| 689 | |
| 690 | phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS1); |
| 691 | if (phy_reg < 0) |
| 692 | return -EIO; |
| 693 | *devices_in_package |= phy_reg; |
| 694 | |
| 695 | return 0; |
| 696 | } |
| 697 | |
| 698 | /** |
| 699 | * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs. |
| 700 | * @bus: the target MII bus |
| 701 | * @addr: PHY address on the MII bus |
| 702 | * @c45_ids: where to store the c45 ID information. |
| 703 | * |
| 704 | * Read the PHY "devices in package". If this appears to be valid, read |
| 705 | * the PHY identifiers for each device. Return the "devices in package" |
| 706 | * and identifiers in @c45_ids. |
| 707 | * |
| 708 | * Returns zero on success, %-EIO on bus access error, or %-ENODEV if |
| 709 | * the "devices in package" is invalid. |
| 710 | */ |
| 711 | static int get_phy_c45_ids(struct mii_bus *bus, int addr, |
| 712 | struct phy_c45_device_ids *c45_ids) |
| 713 | { |
| 714 | const int num_ids = ARRAY_SIZE(c45_ids->device_ids); |
| 715 | u32 devs_in_pkg = 0; |
| 716 | int i, ret, phy_reg; |
| 717 | |
| 718 | /* Find first non-zero Devices In package. Device zero is reserved |
| 719 | * for 802.3 c45 complied PHYs, so don't probe it at first. |
| 720 | */ |
| 721 | for (i = 1; i < MDIO_MMD_NUM && (devs_in_pkg == 0 || |
| 722 | (devs_in_pkg & 0x1fffffff) == 0x1fffffff); i++) { |
| 723 | if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) { |
| 724 | /* Check that there is a device present at this |
| 725 | * address before reading the devices-in-package |
| 726 | * register to avoid reading garbage from the PHY. |
| 727 | * Some PHYs (88x3310) vendor space is not IEEE802.3 |
| 728 | * compliant. |
| 729 | */ |
| 730 | ret = phy_c45_probe_present(bus, addr, i); |
| 731 | if (ret < 0) |
| 732 | return -EIO; |
| 733 | |
| 734 | if (!ret) |
| 735 | continue; |
| 736 | } |
| 737 | phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, &devs_in_pkg); |
| 738 | if (phy_reg < 0) |
| 739 | return -EIO; |
| 740 | } |
| 741 | |
| 742 | if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) { |
| 743 | /* If mostly Fs, there is no device there, then let's probe |
| 744 | * MMD 0, as some 10G PHYs have zero Devices In package, |
| 745 | * e.g. Cortina CS4315/CS4340 PHY. |
| 746 | */ |
| 747 | phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, &devs_in_pkg); |
| 748 | if (phy_reg < 0) |
| 749 | return -EIO; |
| 750 | |
| 751 | /* no device there, let's get out of here */ |
| 752 | if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) |
| 753 | return -ENODEV; |
| 754 | } |
| 755 | |
| 756 | /* Now probe Device Identifiers for each device present. */ |
| 757 | for (i = 1; i < num_ids; i++) { |
| 758 | if (!(devs_in_pkg & (1 << i))) |
| 759 | continue; |
| 760 | |
| 761 | if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) { |
| 762 | /* Probe the "Device Present" bits for the vendor MMDs |
| 763 | * to ignore these if they do not contain IEEE 802.3 |
| 764 | * registers. |
| 765 | */ |
| 766 | ret = phy_c45_probe_present(bus, addr, i); |
| 767 | if (ret < 0) |
| 768 | return ret; |
| 769 | |
| 770 | if (!ret) |
| 771 | continue; |
| 772 | } |
| 773 | |
| 774 | phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID1); |
| 775 | if (phy_reg < 0) |
| 776 | return -EIO; |
| 777 | c45_ids->device_ids[i] = phy_reg << 16; |
| 778 | |
| 779 | phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID2); |
| 780 | if (phy_reg < 0) |
| 781 | return -EIO; |
| 782 | c45_ids->device_ids[i] |= phy_reg; |
| 783 | } |
| 784 | |
| 785 | c45_ids->devices_in_package = devs_in_pkg; |
| 786 | /* Bit 0 doesn't represent a device, it indicates c22 regs presence */ |
| 787 | c45_ids->mmds_present = devs_in_pkg & ~BIT(0); |
| 788 | |
| 789 | return 0; |
| 790 | } |
| 791 | |
| 792 | /** |
| 793 | * get_phy_c22_id - reads the specified addr for its clause 22 ID. |
| 794 | * @bus: the target MII bus |
| 795 | * @addr: PHY address on the MII bus |
| 796 | * @phy_id: where to store the ID retrieved. |
| 797 | * |
| 798 | * Read the 802.3 clause 22 PHY ID from the PHY at @addr on the @bus, |
| 799 | * placing it in @phy_id. Return zero on successful read and the ID is |
| 800 | * valid, %-EIO on bus access error, or %-ENODEV if no device responds |
| 801 | * or invalid ID. |
| 802 | */ |
| 803 | static int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id) |
| 804 | { |
| 805 | int phy_reg; |
| 806 | |
| 807 | /* Grab the bits from PHYIR1, and put them in the upper half */ |
| 808 | // phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); |
| 809 | #ifdef CONFIG_MDIO_C45 //zw.wang Customer chooses phy c22/c45 issues on 20240301 |
| 810 | mdiobus_write(bus, addr, 0x0d, 1); |
| 811 | mdiobus_write(bus, addr, 0x0e, 2); |
| 812 | mdiobus_write(bus, addr, 0x0d, 0x4000 | 1); |
| 813 | phy_reg = mdiobus_read(bus, addr, 0x0e); |
| 814 | #else |
| 815 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID1); |
| 816 | #endif |
| 817 | if (phy_reg < 0) { |
| 818 | /* returning -ENODEV doesn't stop bus scanning */ |
| 819 | return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO; |
| 820 | } |
| 821 | |
| 822 | *phy_id = phy_reg << 16; |
| 823 | |
| 824 | /* Grab the bits from PHYIR2, and put them in the lower half */ |
| 825 | // phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); |
| 826 | #ifdef CONFIG_MDIO_C45 |
| 827 | mdiobus_write(bus, addr, 0x0d, 1); |
| 828 | mdiobus_write(bus, addr, 0x0e, 3); |
| 829 | mdiobus_write(bus, addr, 0x0d, 0x4000 | 1); |
| 830 | phy_reg = mdiobus_read(bus, addr, 0x0e); |
| 831 | #else |
| 832 | phy_reg = mdiobus_read(bus, addr, MII_PHYSID2); |
| 833 | #endif |
| 834 | if (phy_reg < 0) { |
| 835 | /* returning -ENODEV doesn't stop bus scanning */ |
| 836 | return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO; |
| 837 | } |
| 838 | |
| 839 | *phy_id |= phy_reg; |
| 840 | |
| 841 | #ifdef CONFIG_MDIO_C45 |
| 842 | printk("[%s] read with c45 phy id:0x%x\n", __func__, *phy_id); |
| 843 | #else |
| 844 | printk("[%s] read with c22 phy id:0x%x\n", __func__, *phy_id); |
| 845 | #endif |
| 846 | /* If the phy_id is mostly Fs, there is no device there */ |
| 847 | if ((*phy_id & 0x1fffffff) == 0x1fffffff) |
| 848 | return -ENODEV; |
| 849 | |
| 850 | return 0; |
| 851 | } |
| 852 | |
| 853 | /** |
| 854 | * get_phy_device - reads the specified PHY device and returns its @phy_device |
| 855 | * struct |
| 856 | * @bus: the target MII bus |
| 857 | * @addr: PHY address on the MII bus |
| 858 | * @is_c45: If true the PHY uses the 802.3 clause 45 protocol |
| 859 | * |
| 860 | * Probe for a PHY at @addr on @bus. |
| 861 | * |
| 862 | * When probing for a clause 22 PHY, then read the ID registers. If we find |
| 863 | * a valid ID, allocate and return a &struct phy_device. |
| 864 | * |
| 865 | * When probing for a clause 45 PHY, read the "devices in package" registers. |
| 866 | * If the "devices in package" appears valid, read the ID registers for each |
| 867 | * MMD, allocate and return a &struct phy_device. |
| 868 | * |
| 869 | * Returns an allocated &struct phy_device on success, %-ENODEV if there is |
| 870 | * no PHY present, or %-EIO on bus access error. |
| 871 | */ |
| 872 | struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) |
| 873 | { |
| 874 | struct phy_c45_device_ids c45_ids; |
| 875 | u32 phy_id = 0; |
| 876 | int r; |
| 877 | |
| 878 | c45_ids.devices_in_package = 0; |
| 879 | c45_ids.mmds_present = 0; |
| 880 | memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids)); |
| 881 | |
| 882 | if (is_c45) |
| 883 | r = get_phy_c45_ids(bus, addr, &c45_ids); |
| 884 | else |
| 885 | r = get_phy_c22_id(bus, addr, &phy_id); |
| 886 | |
| 887 | if (r) |
| 888 | return ERR_PTR(r); |
| 889 | |
| 890 | return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids); |
| 891 | } |
| 892 | EXPORT_SYMBOL(get_phy_device); |
| 893 | |
| 894 | /** |
| 895 | * phy_device_register - Register the phy device on the MDIO bus |
| 896 | * @phydev: phy_device structure to be added to the MDIO bus |
| 897 | */ |
| 898 | int phy_device_register(struct phy_device *phydev) |
| 899 | { |
| 900 | int err; |
| 901 | |
| 902 | err = mdiobus_register_device(&phydev->mdio); |
| 903 | if (err) |
| 904 | return err; |
| 905 | |
| 906 | /* Deassert the reset signal */ |
| 907 | phy_device_reset(phydev, 0); |
| 908 | |
| 909 | /* Run all of the fixups for this PHY */ |
| 910 | err = phy_scan_fixups(phydev); |
| 911 | if (err) { |
| 912 | phydev_err(phydev, "failed to initialize\n"); |
| 913 | goto out; |
| 914 | } |
| 915 | |
| 916 | err = device_add(&phydev->mdio.dev); |
| 917 | if (err) { |
| 918 | phydev_err(phydev, "failed to add\n"); |
| 919 | goto out; |
| 920 | } |
| 921 | |
| 922 | return 0; |
| 923 | |
| 924 | out: |
| 925 | /* Assert the reset signal */ |
| 926 | phy_device_reset(phydev, 1); |
| 927 | |
| 928 | mdiobus_unregister_device(&phydev->mdio); |
| 929 | return err; |
| 930 | } |
| 931 | EXPORT_SYMBOL(phy_device_register); |
| 932 | |
| 933 | /** |
| 934 | * phy_device_remove - Remove a previously registered phy device from the MDIO bus |
| 935 | * @phydev: phy_device structure to remove |
| 936 | * |
| 937 | * This doesn't free the phy_device itself, it merely reverses the effects |
| 938 | * of phy_device_register(). Use phy_device_free() to free the device |
| 939 | * after calling this function. |
| 940 | */ |
| 941 | void phy_device_remove(struct phy_device *phydev) |
| 942 | { |
| 943 | if (phydev->mii_ts) |
| 944 | unregister_mii_timestamper(phydev->mii_ts); |
| 945 | |
| 946 | device_del(&phydev->mdio.dev); |
| 947 | |
| 948 | /* Assert the reset signal */ |
| 949 | phy_device_reset(phydev, 1); |
| 950 | |
| 951 | mdiobus_unregister_device(&phydev->mdio); |
| 952 | } |
| 953 | EXPORT_SYMBOL(phy_device_remove); |
| 954 | |
| 955 | /** |
| 956 | * phy_find_first - finds the first PHY device on the bus |
| 957 | * @bus: the target MII bus |
| 958 | */ |
| 959 | struct phy_device *phy_find_first(struct mii_bus *bus) |
| 960 | { |
| 961 | struct phy_device *phydev; |
| 962 | int addr; |
| 963 | |
| 964 | for (addr = 0; addr < PHY_MAX_ADDR; addr++) { |
| 965 | phydev = mdiobus_get_phy(bus, addr); |
| 966 | if (phydev) { |
| 967 | printk("[%s] addr:%d\n", __func__, addr); |
| 968 | return phydev; |
| 969 | } |
| 970 | } |
| 971 | return NULL; |
| 972 | } |
| 973 | EXPORT_SYMBOL(phy_find_first); |
| 974 | |
| 975 | static void phy_link_change(struct phy_device *phydev, bool up) |
| 976 | { |
| 977 | struct net_device *netdev = phydev->attached_dev; |
| 978 | |
| 979 | if (up) |
| 980 | netif_carrier_on(netdev); |
| 981 | else |
| 982 | netif_carrier_off(netdev); |
| 983 | phydev->adjust_link(netdev); |
| 984 | if (phydev->mii_ts && phydev->mii_ts->link_state) |
| 985 | phydev->mii_ts->link_state(phydev->mii_ts, phydev); |
| 986 | } |
| 987 | |
| 988 | /** |
| 989 | * phy_prepare_link - prepares the PHY layer to monitor link status |
| 990 | * @phydev: target phy_device struct |
| 991 | * @handler: callback function for link status change notifications |
| 992 | * |
| 993 | * Description: Tells the PHY infrastructure to handle the |
| 994 | * gory details on monitoring link status (whether through |
| 995 | * polling or an interrupt), and to call back to the |
| 996 | * connected device driver when the link status changes. |
| 997 | * If you want to monitor your own link state, don't call |
| 998 | * this function. |
| 999 | */ |
| 1000 | static void phy_prepare_link(struct phy_device *phydev, |
| 1001 | void (*handler)(struct net_device *)) |
| 1002 | { |
| 1003 | phydev->adjust_link = handler; |
| 1004 | } |
| 1005 | |
| 1006 | /** |
| 1007 | * phy_connect_direct - connect an ethernet device to a specific phy_device |
| 1008 | * @dev: the network device to connect |
| 1009 | * @phydev: the pointer to the phy device |
| 1010 | * @handler: callback function for state change notifications |
| 1011 | * @interface: PHY device's interface |
| 1012 | */ |
| 1013 | int phy_connect_direct(struct net_device *dev, struct phy_device *phydev, |
| 1014 | void (*handler)(struct net_device *), |
| 1015 | phy_interface_t interface) |
| 1016 | { |
| 1017 | int rc; |
| 1018 | |
| 1019 | if (!dev) |
| 1020 | return -EINVAL; |
| 1021 | |
| 1022 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
| 1023 | if (rc) |
| 1024 | return rc; |
| 1025 | |
| 1026 | phy_prepare_link(phydev, handler); |
| 1027 | if (phy_interrupt_is_valid(phydev)) |
| 1028 | phy_request_interrupt(phydev); |
| 1029 | |
| 1030 | return 0; |
| 1031 | } |
| 1032 | EXPORT_SYMBOL(phy_connect_direct); |
| 1033 | |
| 1034 | /** |
| 1035 | * phy_connect - connect an ethernet device to a PHY device |
| 1036 | * @dev: the network device to connect |
| 1037 | * @bus_id: the id string of the PHY device to connect |
| 1038 | * @handler: callback function for state change notifications |
| 1039 | * @interface: PHY device's interface |
| 1040 | * |
| 1041 | * Description: Convenience function for connecting ethernet |
| 1042 | * devices to PHY devices. The default behavior is for |
| 1043 | * the PHY infrastructure to handle everything, and only notify |
| 1044 | * the connected driver when the link status changes. If you |
| 1045 | * don't want, or can't use the provided functionality, you may |
| 1046 | * choose to call only the subset of functions which provide |
| 1047 | * the desired functionality. |
| 1048 | */ |
| 1049 | struct phy_device *phy_connect(struct net_device *dev, const char *bus_id, |
| 1050 | void (*handler)(struct net_device *), |
| 1051 | phy_interface_t interface) |
| 1052 | { |
| 1053 | struct phy_device *phydev; |
| 1054 | struct device *d; |
| 1055 | int rc; |
| 1056 | |
| 1057 | /* Search the list of PHY devices on the mdio bus for the |
| 1058 | * PHY with the requested name |
| 1059 | */ |
| 1060 | d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id); |
| 1061 | if (!d) { |
| 1062 | pr_err("PHY %s not found\n", bus_id); |
| 1063 | return ERR_PTR(-ENODEV); |
| 1064 | } |
| 1065 | phydev = to_phy_device(d); |
| 1066 | |
| 1067 | rc = phy_connect_direct(dev, phydev, handler, interface); |
| 1068 | put_device(d); |
| 1069 | if (rc) |
| 1070 | return ERR_PTR(rc); |
| 1071 | |
| 1072 | return phydev; |
| 1073 | } |
| 1074 | EXPORT_SYMBOL(phy_connect); |
| 1075 | |
| 1076 | /** |
| 1077 | * phy_disconnect - disable interrupts, stop state machine, and detach a PHY |
| 1078 | * device |
| 1079 | * @phydev: target phy_device struct |
| 1080 | */ |
| 1081 | void phy_disconnect(struct phy_device *phydev) |
| 1082 | { |
| 1083 | if (phy_is_started(phydev)) |
| 1084 | phy_stop(phydev); |
| 1085 | |
| 1086 | if (phy_interrupt_is_valid(phydev)) |
| 1087 | phy_free_interrupt(phydev); |
| 1088 | |
| 1089 | phydev->adjust_link = NULL; |
| 1090 | |
| 1091 | phy_detach(phydev); |
| 1092 | } |
| 1093 | EXPORT_SYMBOL(phy_disconnect); |
| 1094 | |
| 1095 | /** |
| 1096 | * phy_poll_reset - Safely wait until a PHY reset has properly completed |
| 1097 | * @phydev: The PHY device to poll |
| 1098 | * |
| 1099 | * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as |
| 1100 | * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR |
| 1101 | * register must be polled until the BMCR_RESET bit clears. |
| 1102 | * |
| 1103 | * Furthermore, any attempts to write to PHY registers may have no effect |
| 1104 | * or even generate MDIO bus errors until this is complete. |
| 1105 | * |
| 1106 | * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the |
| 1107 | * standard and do not fully reset after the BMCR_RESET bit is set, and may |
| 1108 | * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an |
| 1109 | * effort to support such broken PHYs, this function is separate from the |
| 1110 | * standard phy_init_hw() which will zero all the other bits in the BMCR |
| 1111 | * and reapply all driver-specific and board-specific fixups. |
| 1112 | */ |
| 1113 | static int phy_poll_reset(struct phy_device *phydev) |
| 1114 | { |
| 1115 | /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */ |
| 1116 | int ret, val; |
| 1117 | |
| 1118 | ret = phy_read_poll_timeout(phydev, MII_BMCR, val, !(val & BMCR_RESET), |
| 1119 | 50000, 600000, true); |
| 1120 | if (ret) |
| 1121 | return ret; |
| 1122 | /* Some chips (smsc911x) may still need up to another 1ms after the |
| 1123 | * BMCR_RESET bit is cleared before they are usable. |
| 1124 | */ |
| 1125 | msleep(1); |
| 1126 | return 0; |
| 1127 | } |
| 1128 | |
| 1129 | int phy_init_hw(struct phy_device *phydev) |
| 1130 | { |
| 1131 | int ret = 0; |
| 1132 | |
| 1133 | /* Deassert the reset signal */ |
| 1134 | phy_device_reset(phydev, 0); |
| 1135 | |
| 1136 | if (!phydev->drv) |
| 1137 | return 0; |
| 1138 | |
| 1139 | if (phydev->drv->soft_reset) { |
| 1140 | ret = phydev->drv->soft_reset(phydev); |
| 1141 | /* see comment in genphy_soft_reset for an explanation */ |
| 1142 | if (!ret) |
| 1143 | phydev->suspended = 0; |
| 1144 | } |
| 1145 | |
| 1146 | if (ret < 0) |
| 1147 | return ret; |
| 1148 | |
| 1149 | ret = phy_scan_fixups(phydev); |
| 1150 | if (ret < 0) |
| 1151 | return ret; |
| 1152 | |
| 1153 | if (phydev->drv->config_init) { |
| 1154 | ret = phydev->drv->config_init(phydev); |
| 1155 | if (ret < 0) |
| 1156 | return ret; |
| 1157 | } |
| 1158 | |
| 1159 | if (phydev->drv->config_intr) { |
| 1160 | ret = phydev->drv->config_intr(phydev); |
| 1161 | if (ret < 0) |
| 1162 | return ret; |
| 1163 | } |
| 1164 | |
| 1165 | return 0; |
| 1166 | } |
| 1167 | EXPORT_SYMBOL(phy_init_hw); |
| 1168 | |
| 1169 | void phy_attached_info(struct phy_device *phydev) |
| 1170 | { |
| 1171 | phy_attached_print(phydev, NULL); |
| 1172 | } |
| 1173 | EXPORT_SYMBOL(phy_attached_info); |
| 1174 | |
| 1175 | #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%s)" |
| 1176 | char *phy_attached_info_irq(struct phy_device *phydev) |
| 1177 | { |
| 1178 | char *irq_str; |
| 1179 | char irq_num[8]; |
| 1180 | |
| 1181 | switch(phydev->irq) { |
| 1182 | case PHY_POLL: |
| 1183 | irq_str = "POLL"; |
| 1184 | break; |
| 1185 | case PHY_IGNORE_INTERRUPT: |
| 1186 | irq_str = "IGNORE"; |
| 1187 | break; |
| 1188 | default: |
| 1189 | snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq); |
| 1190 | irq_str = irq_num; |
| 1191 | break; |
| 1192 | } |
| 1193 | |
| 1194 | return kasprintf(GFP_KERNEL, "%s", irq_str); |
| 1195 | } |
| 1196 | EXPORT_SYMBOL(phy_attached_info_irq); |
| 1197 | |
| 1198 | void phy_attached_print(struct phy_device *phydev, const char *fmt, ...) |
| 1199 | { |
| 1200 | const char *drv_name = phydev->drv ? phydev->drv->name : "unbound"; |
| 1201 | char *irq_str = phy_attached_info_irq(phydev); |
| 1202 | |
| 1203 | if (!fmt) { |
| 1204 | phydev_info(phydev, ATTACHED_FMT "\n", |
| 1205 | drv_name, phydev_name(phydev), |
| 1206 | irq_str); |
| 1207 | } else { |
| 1208 | va_list ap; |
| 1209 | |
| 1210 | phydev_info(phydev, ATTACHED_FMT, |
| 1211 | drv_name, phydev_name(phydev), |
| 1212 | irq_str); |
| 1213 | |
| 1214 | va_start(ap, fmt); |
| 1215 | vprintk(fmt, ap); |
| 1216 | va_end(ap); |
| 1217 | } |
| 1218 | kfree(irq_str); |
| 1219 | } |
| 1220 | EXPORT_SYMBOL(phy_attached_print); |
| 1221 | |
| 1222 | static void phy_sysfs_create_links(struct phy_device *phydev) |
| 1223 | { |
| 1224 | struct net_device *dev = phydev->attached_dev; |
| 1225 | int err; |
| 1226 | |
| 1227 | if (!dev) |
| 1228 | return; |
| 1229 | |
| 1230 | err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj, |
| 1231 | "attached_dev"); |
| 1232 | if (err) |
| 1233 | return; |
| 1234 | |
| 1235 | err = sysfs_create_link_nowarn(&dev->dev.kobj, |
| 1236 | &phydev->mdio.dev.kobj, |
| 1237 | "phydev"); |
| 1238 | if (err) { |
| 1239 | dev_err(&dev->dev, "could not add device link to %s err %d\n", |
| 1240 | kobject_name(&phydev->mdio.dev.kobj), |
| 1241 | err); |
| 1242 | /* non-fatal - some net drivers can use one netdevice |
| 1243 | * with more then one phy |
| 1244 | */ |
| 1245 | } |
| 1246 | |
| 1247 | phydev->sysfs_links = true; |
| 1248 | } |
| 1249 | |
| 1250 | static ssize_t |
| 1251 | phy_standalone_show(struct device *dev, struct device_attribute *attr, |
| 1252 | char *buf) |
| 1253 | { |
| 1254 | struct phy_device *phydev = to_phy_device(dev); |
| 1255 | |
| 1256 | return sprintf(buf, "%d\n", !phydev->attached_dev); |
| 1257 | } |
| 1258 | static DEVICE_ATTR_RO(phy_standalone); |
| 1259 | |
| 1260 | /** |
| 1261 | * phy_sfp_attach - attach the SFP bus to the PHY upstream network device |
| 1262 | * @upstream: pointer to the phy device |
| 1263 | * @bus: sfp bus representing cage being attached |
| 1264 | * |
| 1265 | * This is used to fill in the sfp_upstream_ops .attach member. |
| 1266 | */ |
| 1267 | void phy_sfp_attach(void *upstream, struct sfp_bus *bus) |
| 1268 | { |
| 1269 | struct phy_device *phydev = upstream; |
| 1270 | |
| 1271 | if (phydev->attached_dev) |
| 1272 | phydev->attached_dev->sfp_bus = bus; |
| 1273 | phydev->sfp_bus_attached = true; |
| 1274 | } |
| 1275 | EXPORT_SYMBOL(phy_sfp_attach); |
| 1276 | |
| 1277 | /** |
| 1278 | * phy_sfp_detach - detach the SFP bus from the PHY upstream network device |
| 1279 | * @upstream: pointer to the phy device |
| 1280 | * @bus: sfp bus representing cage being attached |
| 1281 | * |
| 1282 | * This is used to fill in the sfp_upstream_ops .detach member. |
| 1283 | */ |
| 1284 | void phy_sfp_detach(void *upstream, struct sfp_bus *bus) |
| 1285 | { |
| 1286 | struct phy_device *phydev = upstream; |
| 1287 | |
| 1288 | if (phydev->attached_dev) |
| 1289 | phydev->attached_dev->sfp_bus = NULL; |
| 1290 | phydev->sfp_bus_attached = false; |
| 1291 | } |
| 1292 | EXPORT_SYMBOL(phy_sfp_detach); |
| 1293 | |
| 1294 | /** |
| 1295 | * phy_sfp_probe - probe for a SFP cage attached to this PHY device |
| 1296 | * @phydev: Pointer to phy_device |
| 1297 | * @ops: SFP's upstream operations |
| 1298 | */ |
| 1299 | int phy_sfp_probe(struct phy_device *phydev, |
| 1300 | const struct sfp_upstream_ops *ops) |
| 1301 | { |
| 1302 | struct sfp_bus *bus; |
| 1303 | int ret = 0; |
| 1304 | |
| 1305 | if (phydev->mdio.dev.fwnode) { |
| 1306 | bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode); |
| 1307 | if (IS_ERR(bus)) |
| 1308 | return PTR_ERR(bus); |
| 1309 | |
| 1310 | phydev->sfp_bus = bus; |
| 1311 | |
| 1312 | ret = sfp_bus_add_upstream(bus, phydev, ops); |
| 1313 | sfp_bus_put(bus); |
| 1314 | } |
| 1315 | return ret; |
| 1316 | } |
| 1317 | EXPORT_SYMBOL(phy_sfp_probe); |
| 1318 | |
xf.li | 6b423c7 | 2025-03-14 00:07:42 -0700 | [diff] [blame^] | 1319 | static bool phy_drv_supports_irq(struct phy_driver *phydrv) |
| 1320 | { |
| 1321 | return phydrv->config_intr && phydrv->ack_interrupt; |
| 1322 | } |
xf.li | ed996a2 | 2025-03-13 23:49:05 -0700 | [diff] [blame] | 1323 | /** |
| 1324 | * phy_attach_direct - attach a network device to a given PHY device pointer |
| 1325 | * @dev: network device to attach |
| 1326 | * @phydev: Pointer to phy_device to attach |
| 1327 | * @flags: PHY device's dev_flags |
| 1328 | * @interface: PHY device's interface |
| 1329 | * |
| 1330 | * Description: Called by drivers to attach to a particular PHY |
| 1331 | * device. The phy_device is found, and properly hooked up |
| 1332 | * to the phy_driver. If no driver is attached, then a |
| 1333 | * generic driver is used. The phy_device is given a ptr to |
| 1334 | * the attaching device, and given a callback for link status |
| 1335 | * change. The phy_device is returned to the attaching driver. |
| 1336 | * This function takes a reference on the phy device. |
| 1337 | */ |
| 1338 | int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, |
| 1339 | u32 flags, phy_interface_t interface) |
| 1340 | { |
| 1341 | struct mii_bus *bus = phydev->mdio.bus; |
| 1342 | struct device *d = &phydev->mdio.dev; |
| 1343 | struct module *ndev_owner = NULL; |
| 1344 | bool using_genphy = false; |
| 1345 | int err; |
| 1346 | |
| 1347 | /* For Ethernet device drivers that register their own MDIO bus, we |
| 1348 | * will have bus->owner match ndev_mod, so we do not want to increment |
| 1349 | * our own module->refcnt here, otherwise we would not be able to |
| 1350 | * unload later on. |
| 1351 | */ |
| 1352 | if (dev) |
| 1353 | ndev_owner = dev->dev.parent->driver->owner; |
| 1354 | if (ndev_owner != bus->owner && !try_module_get(bus->owner)) { |
| 1355 | phydev_err(phydev, "failed to get the bus module\n"); |
| 1356 | return -EIO; |
| 1357 | } |
| 1358 | |
| 1359 | get_device(d); |
| 1360 | |
| 1361 | /* Assume that if there is no driver, that it doesn't |
| 1362 | * exist, and we should use the genphy driver. |
| 1363 | */ |
| 1364 | if (!d->driver) { |
| 1365 | if (phydev->is_c45) |
| 1366 | d->driver = &genphy_c45_driver.mdiodrv.driver; |
| 1367 | else |
| 1368 | d->driver = &genphy_driver.mdiodrv.driver; |
| 1369 | |
| 1370 | using_genphy = true; |
| 1371 | } |
| 1372 | |
| 1373 | if (!try_module_get(d->driver->owner)) { |
| 1374 | phydev_err(phydev, "failed to get the device driver module\n"); |
| 1375 | err = -EIO; |
| 1376 | goto error_put_device; |
| 1377 | } |
| 1378 | |
| 1379 | if (using_genphy) { |
| 1380 | err = d->driver->probe(d); |
| 1381 | if (err >= 0) |
| 1382 | err = device_bind_driver(d); |
| 1383 | |
| 1384 | if (err) |
| 1385 | goto error_module_put; |
| 1386 | } |
| 1387 | |
| 1388 | if (phydev->attached_dev) { |
| 1389 | dev_err(&dev->dev, "PHY already attached\n"); |
| 1390 | err = -EBUSY; |
| 1391 | goto error; |
| 1392 | } |
| 1393 | |
| 1394 | phydev->phy_link_change = phy_link_change; |
| 1395 | if (dev) { |
| 1396 | phydev->attached_dev = dev; |
| 1397 | dev->phydev = phydev; |
| 1398 | |
| 1399 | if (phydev->sfp_bus_attached) |
| 1400 | dev->sfp_bus = phydev->sfp_bus; |
| 1401 | } |
| 1402 | |
| 1403 | /* Some Ethernet drivers try to connect to a PHY device before |
| 1404 | * calling register_netdevice() -> netdev_register_kobject() and |
| 1405 | * does the dev->dev.kobj initialization. Here we only check for |
| 1406 | * success which indicates that the network device kobject is |
| 1407 | * ready. Once we do that we still need to keep track of whether |
| 1408 | * links were successfully set up or not for phy_detach() to |
| 1409 | * remove them accordingly. |
| 1410 | */ |
| 1411 | phydev->sysfs_links = false; |
| 1412 | |
| 1413 | phy_sysfs_create_links(phydev); |
| 1414 | |
| 1415 | if (!phydev->attached_dev) { |
| 1416 | err = sysfs_create_file(&phydev->mdio.dev.kobj, |
| 1417 | &dev_attr_phy_standalone.attr); |
| 1418 | if (err) |
| 1419 | phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n"); |
| 1420 | } |
| 1421 | |
| 1422 | phydev->dev_flags |= flags; |
| 1423 | |
| 1424 | phydev->interface = interface; |
| 1425 | |
| 1426 | phydev->state = PHY_READY; |
| 1427 | |
xf.li | 6b423c7 | 2025-03-14 00:07:42 -0700 | [diff] [blame^] | 1428 | if (!phy_drv_supports_irq(phydev->drv) && phy_interrupt_is_valid(phydev)) |
| 1429 | phydev->irq = PHY_POLL; |
xf.li | ed996a2 | 2025-03-13 23:49:05 -0700 | [diff] [blame] | 1430 | /* Port is set to PORT_TP by default and the actual PHY driver will set |
| 1431 | * it to different value depending on the PHY configuration. If we have |
| 1432 | * the generic PHY driver we can't figure it out, thus set the old |
| 1433 | * legacy PORT_MII value. |
| 1434 | */ |
| 1435 | if (using_genphy) |
| 1436 | phydev->port = PORT_MII; |
| 1437 | |
| 1438 | /* Initial carrier state is off as the phy is about to be |
| 1439 | * (re)initialized. |
| 1440 | */ |
| 1441 | if (dev) |
| 1442 | netif_carrier_off(phydev->attached_dev); |
| 1443 | |
| 1444 | /* Do initial configuration here, now that |
| 1445 | * we have certain key parameters |
| 1446 | * (dev_flags and interface) |
| 1447 | */ |
| 1448 | err = phy_init_hw(phydev); |
| 1449 | if (err) |
| 1450 | goto error; |
| 1451 | |
| 1452 | err = phy_disable_interrupts(phydev); |
| 1453 | if (err) |
| 1454 | return err; |
| 1455 | |
| 1456 | phy_resume(phydev); |
| 1457 | phy_led_triggers_register(phydev); |
| 1458 | |
| 1459 | return err; |
| 1460 | |
| 1461 | error: |
| 1462 | /* phy_detach() does all of the cleanup below */ |
| 1463 | phy_detach(phydev); |
| 1464 | return err; |
| 1465 | |
| 1466 | error_module_put: |
| 1467 | module_put(d->driver->owner); |
| 1468 | error_put_device: |
| 1469 | put_device(d); |
| 1470 | if (ndev_owner != bus->owner) |
| 1471 | module_put(bus->owner); |
| 1472 | return err; |
| 1473 | } |
| 1474 | EXPORT_SYMBOL(phy_attach_direct); |
| 1475 | |
| 1476 | /** |
| 1477 | * phy_attach - attach a network device to a particular PHY device |
| 1478 | * @dev: network device to attach |
| 1479 | * @bus_id: Bus ID of PHY device to attach |
| 1480 | * @interface: PHY device's interface |
| 1481 | * |
| 1482 | * Description: Same as phy_attach_direct() except that a PHY bus_id |
| 1483 | * string is passed instead of a pointer to a struct phy_device. |
| 1484 | */ |
| 1485 | struct phy_device *phy_attach(struct net_device *dev, const char *bus_id, |
| 1486 | phy_interface_t interface) |
| 1487 | { |
| 1488 | struct bus_type *bus = &mdio_bus_type; |
| 1489 | struct phy_device *phydev; |
| 1490 | struct device *d; |
| 1491 | int rc; |
| 1492 | |
| 1493 | if (!dev) |
| 1494 | return ERR_PTR(-EINVAL); |
| 1495 | |
| 1496 | /* Search the list of PHY devices on the mdio bus for the |
| 1497 | * PHY with the requested name |
| 1498 | */ |
| 1499 | d = bus_find_device_by_name(bus, NULL, bus_id); |
| 1500 | if (!d) { |
| 1501 | pr_err("PHY %s not found\n", bus_id); |
| 1502 | return ERR_PTR(-ENODEV); |
| 1503 | } |
| 1504 | phydev = to_phy_device(d); |
| 1505 | |
| 1506 | rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface); |
| 1507 | put_device(d); |
| 1508 | if (rc) |
| 1509 | return ERR_PTR(rc); |
| 1510 | |
| 1511 | return phydev; |
| 1512 | } |
| 1513 | EXPORT_SYMBOL(phy_attach); |
| 1514 | |
| 1515 | static bool phy_driver_is_genphy_kind(struct phy_device *phydev, |
| 1516 | struct device_driver *driver) |
| 1517 | { |
| 1518 | struct device *d = &phydev->mdio.dev; |
| 1519 | bool ret = false; |
| 1520 | |
| 1521 | if (!phydev->drv) |
| 1522 | return ret; |
| 1523 | |
| 1524 | get_device(d); |
| 1525 | ret = d->driver == driver; |
| 1526 | put_device(d); |
| 1527 | |
| 1528 | return ret; |
| 1529 | } |
| 1530 | |
| 1531 | bool phy_driver_is_genphy(struct phy_device *phydev) |
| 1532 | { |
| 1533 | return phy_driver_is_genphy_kind(phydev, |
| 1534 | &genphy_driver.mdiodrv.driver); |
| 1535 | } |
| 1536 | EXPORT_SYMBOL_GPL(phy_driver_is_genphy); |
| 1537 | |
| 1538 | bool phy_driver_is_genphy_10g(struct phy_device *phydev) |
| 1539 | { |
| 1540 | return phy_driver_is_genphy_kind(phydev, |
| 1541 | &genphy_c45_driver.mdiodrv.driver); |
| 1542 | } |
| 1543 | EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g); |
| 1544 | |
| 1545 | /** |
| 1546 | * phy_package_join - join a common PHY group |
| 1547 | * @phydev: target phy_device struct |
| 1548 | * @addr: cookie and PHY address for global register access |
| 1549 | * @priv_size: if non-zero allocate this amount of bytes for private data |
| 1550 | * |
| 1551 | * This joins a PHY group and provides a shared storage for all phydevs in |
| 1552 | * this group. This is intended to be used for packages which contain |
| 1553 | * more than one PHY, for example a quad PHY transceiver. |
| 1554 | * |
| 1555 | * The addr parameter serves as a cookie which has to have the same value |
| 1556 | * for all members of one group and as a PHY address to access generic |
| 1557 | * registers of a PHY package. Usually, one of the PHY addresses of the |
| 1558 | * different PHYs in the package provides access to these global registers. |
| 1559 | * The address which is given here, will be used in the phy_package_read() |
| 1560 | * and phy_package_write() convenience functions. If your PHY doesn't have |
| 1561 | * global registers you can just pick any of the PHY addresses. |
| 1562 | * |
| 1563 | * This will set the shared pointer of the phydev to the shared storage. |
| 1564 | * If this is the first call for a this cookie the shared storage will be |
| 1565 | * allocated. If priv_size is non-zero, the given amount of bytes are |
| 1566 | * allocated for the priv member. |
| 1567 | * |
| 1568 | * Returns < 1 on error, 0 on success. Esp. calling phy_package_join() |
| 1569 | * with the same cookie but a different priv_size is an error. |
| 1570 | */ |
| 1571 | int phy_package_join(struct phy_device *phydev, int addr, size_t priv_size) |
| 1572 | { |
| 1573 | struct mii_bus *bus = phydev->mdio.bus; |
| 1574 | struct phy_package_shared *shared; |
| 1575 | int ret; |
| 1576 | |
| 1577 | if (addr < 0 || addr >= PHY_MAX_ADDR) |
| 1578 | return -EINVAL; |
| 1579 | |
| 1580 | mutex_lock(&bus->shared_lock); |
| 1581 | shared = bus->shared[addr]; |
| 1582 | if (!shared) { |
| 1583 | ret = -ENOMEM; |
| 1584 | shared = kzalloc(sizeof(*shared), GFP_KERNEL); |
| 1585 | if (!shared) |
| 1586 | goto err_unlock; |
| 1587 | if (priv_size) { |
| 1588 | shared->priv = kzalloc(priv_size, GFP_KERNEL); |
| 1589 | if (!shared->priv) |
| 1590 | goto err_free; |
| 1591 | shared->priv_size = priv_size; |
| 1592 | } |
| 1593 | shared->addr = addr; |
| 1594 | refcount_set(&shared->refcnt, 1); |
| 1595 | bus->shared[addr] = shared; |
| 1596 | } else { |
| 1597 | ret = -EINVAL; |
| 1598 | if (priv_size && priv_size != shared->priv_size) |
| 1599 | goto err_unlock; |
| 1600 | refcount_inc(&shared->refcnt); |
| 1601 | } |
| 1602 | mutex_unlock(&bus->shared_lock); |
| 1603 | |
| 1604 | phydev->shared = shared; |
| 1605 | |
| 1606 | return 0; |
| 1607 | |
| 1608 | err_free: |
| 1609 | kfree(shared); |
| 1610 | err_unlock: |
| 1611 | mutex_unlock(&bus->shared_lock); |
| 1612 | return ret; |
| 1613 | } |
| 1614 | EXPORT_SYMBOL_GPL(phy_package_join); |
| 1615 | |
| 1616 | /** |
| 1617 | * phy_package_leave - leave a common PHY group |
| 1618 | * @phydev: target phy_device struct |
| 1619 | * |
| 1620 | * This leaves a PHY group created by phy_package_join(). If this phydev |
| 1621 | * was the last user of the shared data between the group, this data is |
| 1622 | * freed. Resets the phydev->shared pointer to NULL. |
| 1623 | */ |
| 1624 | void phy_package_leave(struct phy_device *phydev) |
| 1625 | { |
| 1626 | struct phy_package_shared *shared = phydev->shared; |
| 1627 | struct mii_bus *bus = phydev->mdio.bus; |
| 1628 | |
| 1629 | if (!shared) |
| 1630 | return; |
| 1631 | |
| 1632 | if (refcount_dec_and_mutex_lock(&shared->refcnt, &bus->shared_lock)) { |
| 1633 | bus->shared[shared->addr] = NULL; |
| 1634 | mutex_unlock(&bus->shared_lock); |
| 1635 | kfree(shared->priv); |
| 1636 | kfree(shared); |
| 1637 | } |
| 1638 | |
| 1639 | phydev->shared = NULL; |
| 1640 | } |
| 1641 | EXPORT_SYMBOL_GPL(phy_package_leave); |
| 1642 | |
| 1643 | static void devm_phy_package_leave(struct device *dev, void *res) |
| 1644 | { |
| 1645 | phy_package_leave(*(struct phy_device **)res); |
| 1646 | } |
| 1647 | |
| 1648 | /** |
| 1649 | * devm_phy_package_join - resource managed phy_package_join() |
| 1650 | * @dev: device that is registering this PHY package |
| 1651 | * @phydev: target phy_device struct |
| 1652 | * @addr: cookie and PHY address for global register access |
| 1653 | * @priv_size: if non-zero allocate this amount of bytes for private data |
| 1654 | * |
| 1655 | * Managed phy_package_join(). Shared storage fetched by this function, |
| 1656 | * phy_package_leave() is automatically called on driver detach. See |
| 1657 | * phy_package_join() for more information. |
| 1658 | */ |
| 1659 | int devm_phy_package_join(struct device *dev, struct phy_device *phydev, |
| 1660 | int addr, size_t priv_size) |
| 1661 | { |
| 1662 | struct phy_device **ptr; |
| 1663 | int ret; |
| 1664 | |
| 1665 | ptr = devres_alloc(devm_phy_package_leave, sizeof(*ptr), |
| 1666 | GFP_KERNEL); |
| 1667 | if (!ptr) |
| 1668 | return -ENOMEM; |
| 1669 | |
| 1670 | ret = phy_package_join(phydev, addr, priv_size); |
| 1671 | |
| 1672 | if (!ret) { |
| 1673 | *ptr = phydev; |
| 1674 | devres_add(dev, ptr); |
| 1675 | } else { |
| 1676 | devres_free(ptr); |
| 1677 | } |
| 1678 | |
| 1679 | return ret; |
| 1680 | } |
| 1681 | EXPORT_SYMBOL_GPL(devm_phy_package_join); |
| 1682 | |
| 1683 | /** |
| 1684 | * phy_detach - detach a PHY device from its network device |
| 1685 | * @phydev: target phy_device struct |
| 1686 | * |
| 1687 | * This detaches the phy device from its network device and the phy |
| 1688 | * driver, and drops the reference count taken in phy_attach_direct(). |
| 1689 | */ |
| 1690 | void phy_detach(struct phy_device *phydev) |
| 1691 | { |
| 1692 | struct net_device *dev = phydev->attached_dev; |
| 1693 | struct module *ndev_owner = NULL; |
| 1694 | struct mii_bus *bus; |
| 1695 | |
| 1696 | if (phydev->sysfs_links) { |
| 1697 | if (dev) |
| 1698 | sysfs_remove_link(&dev->dev.kobj, "phydev"); |
| 1699 | sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev"); |
| 1700 | } |
| 1701 | |
| 1702 | if (!phydev->attached_dev) |
| 1703 | sysfs_remove_file(&phydev->mdio.dev.kobj, |
| 1704 | &dev_attr_phy_standalone.attr); |
| 1705 | |
| 1706 | phy_suspend(phydev); |
| 1707 | if (dev) { |
| 1708 | phydev->attached_dev->phydev = NULL; |
| 1709 | phydev->attached_dev = NULL; |
| 1710 | } |
| 1711 | phydev->phylink = NULL; |
| 1712 | |
| 1713 | phy_led_triggers_unregister(phydev); |
| 1714 | |
| 1715 | if (phydev->mdio.dev.driver) |
| 1716 | module_put(phydev->mdio.dev.driver->owner); |
| 1717 | |
| 1718 | /* If the device had no specific driver before (i.e. - it |
| 1719 | * was using the generic driver), we unbind the device |
| 1720 | * from the generic driver so that there's a chance a |
| 1721 | * real driver could be loaded |
| 1722 | */ |
| 1723 | if (phy_driver_is_genphy(phydev) || |
| 1724 | phy_driver_is_genphy_10g(phydev)) |
| 1725 | device_release_driver(&phydev->mdio.dev); |
| 1726 | |
| 1727 | /* Assert the reset signal */ |
| 1728 | phy_device_reset(phydev, 1); |
| 1729 | |
| 1730 | /* |
| 1731 | * The phydev might go away on the put_device() below, so avoid |
| 1732 | * a use-after-free bug by reading the underlying bus first. |
| 1733 | */ |
| 1734 | bus = phydev->mdio.bus; |
| 1735 | |
| 1736 | put_device(&phydev->mdio.dev); |
| 1737 | if (dev) |
| 1738 | ndev_owner = dev->dev.parent->driver->owner; |
| 1739 | if (ndev_owner != bus->owner) |
| 1740 | module_put(bus->owner); |
| 1741 | } |
| 1742 | EXPORT_SYMBOL(phy_detach); |
| 1743 | |
| 1744 | int phy_suspend(struct phy_device *phydev) |
| 1745 | { |
| 1746 | struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; |
| 1747 | struct net_device *netdev = phydev->attached_dev; |
| 1748 | struct phy_driver *phydrv = phydev->drv; |
| 1749 | int ret; |
| 1750 | |
| 1751 | if (phydev->suspended) |
| 1752 | return 0; |
| 1753 | |
| 1754 | /* If the device has WOL enabled, we cannot suspend the PHY */ |
| 1755 | phy_ethtool_get_wol(phydev, &wol); |
| 1756 | if (wol.wolopts || (netdev && netdev->wol_enabled)) |
| 1757 | return -EBUSY; |
| 1758 | |
| 1759 | if (!phydrv || !phydrv->suspend) |
| 1760 | return 0; |
| 1761 | |
| 1762 | ret = phydrv->suspend(phydev); |
| 1763 | if (!ret) |
| 1764 | phydev->suspended = true; |
| 1765 | |
| 1766 | return ret; |
| 1767 | } |
| 1768 | EXPORT_SYMBOL(phy_suspend); |
| 1769 | |
| 1770 | int __phy_resume(struct phy_device *phydev) |
| 1771 | { |
| 1772 | struct phy_driver *phydrv = phydev->drv; |
| 1773 | int ret; |
| 1774 | |
| 1775 | WARN_ON(!mutex_is_locked(&phydev->lock)); |
| 1776 | |
| 1777 | if (!phydrv || !phydrv->resume) |
| 1778 | return 0; |
| 1779 | |
| 1780 | ret = phydrv->resume(phydev); |
| 1781 | if (!ret) |
| 1782 | phydev->suspended = false; |
| 1783 | |
| 1784 | return ret; |
| 1785 | } |
| 1786 | EXPORT_SYMBOL(__phy_resume); |
| 1787 | |
| 1788 | int phy_resume(struct phy_device *phydev) |
| 1789 | { |
| 1790 | int ret; |
| 1791 | |
| 1792 | mutex_lock(&phydev->lock); |
| 1793 | ret = __phy_resume(phydev); |
| 1794 | mutex_unlock(&phydev->lock); |
| 1795 | |
| 1796 | return ret; |
| 1797 | } |
| 1798 | EXPORT_SYMBOL(phy_resume); |
| 1799 | |
| 1800 | int phy_loopback(struct phy_device *phydev, bool enable) |
| 1801 | { |
| 1802 | struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); |
| 1803 | int ret = 0; |
| 1804 | |
| 1805 | mutex_lock(&phydev->lock); |
| 1806 | |
| 1807 | if (enable && phydev->loopback_enabled) { |
| 1808 | ret = -EBUSY; |
| 1809 | goto out; |
| 1810 | } |
| 1811 | |
| 1812 | if (!enable && !phydev->loopback_enabled) { |
| 1813 | ret = -EINVAL; |
| 1814 | goto out; |
| 1815 | } |
| 1816 | |
| 1817 | if (phydev->drv && phydrv->set_loopback) |
| 1818 | ret = phydrv->set_loopback(phydev, enable); |
| 1819 | else |
| 1820 | ret = -EOPNOTSUPP; |
| 1821 | |
| 1822 | if (ret) |
| 1823 | goto out; |
| 1824 | |
| 1825 | phydev->loopback_enabled = enable; |
| 1826 | |
| 1827 | out: |
| 1828 | mutex_unlock(&phydev->lock); |
| 1829 | return ret; |
| 1830 | } |
| 1831 | EXPORT_SYMBOL(phy_loopback); |
| 1832 | |
| 1833 | /** |
| 1834 | * phy_reset_after_clk_enable - perform a PHY reset if needed |
| 1835 | * @phydev: target phy_device struct |
| 1836 | * |
| 1837 | * Description: Some PHYs are known to need a reset after their refclk was |
| 1838 | * enabled. This function evaluates the flags and perform the reset if it's |
| 1839 | * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy |
| 1840 | * was reset. |
| 1841 | */ |
| 1842 | int phy_reset_after_clk_enable(struct phy_device *phydev) |
| 1843 | { |
| 1844 | if (!phydev || !phydev->drv) |
| 1845 | return -ENODEV; |
| 1846 | |
| 1847 | if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) { |
| 1848 | phy_device_reset(phydev, 1); |
| 1849 | phy_device_reset(phydev, 0); |
| 1850 | return 1; |
| 1851 | } |
| 1852 | |
| 1853 | return 0; |
| 1854 | } |
| 1855 | EXPORT_SYMBOL(phy_reset_after_clk_enable); |
| 1856 | |
| 1857 | /* Generic PHY support and helper functions */ |
| 1858 | |
| 1859 | /** |
| 1860 | * genphy_config_advert - sanitize and advertise auto-negotiation parameters |
| 1861 | * @phydev: target phy_device struct |
| 1862 | * |
| 1863 | * Description: Writes MII_ADVERTISE with the appropriate values, |
| 1864 | * after sanitizing the values to make sure we only advertise |
| 1865 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
| 1866 | * hasn't changed, and > 0 if it has changed. |
| 1867 | */ |
| 1868 | static int genphy_config_advert(struct phy_device *phydev) |
| 1869 | { |
| 1870 | int err, bmsr, changed = 0; |
| 1871 | u32 adv; |
| 1872 | |
| 1873 | /* Only allow advertising what this PHY supports */ |
| 1874 | linkmode_and(phydev->advertising, phydev->advertising, |
| 1875 | phydev->supported); |
| 1876 | |
| 1877 | adv = linkmode_adv_to_mii_adv_t(phydev->advertising); |
| 1878 | |
| 1879 | /* Setup standard advertisement */ |
| 1880 | err = phy_modify_changed(phydev, MII_ADVERTISE, |
| 1881 | ADVERTISE_ALL | ADVERTISE_100BASE4 | |
| 1882 | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM, |
| 1883 | adv); |
| 1884 | if (err < 0) |
| 1885 | return err; |
| 1886 | if (err > 0) |
| 1887 | changed = 1; |
| 1888 | |
| 1889 | bmsr = phy_read(phydev, MII_BMSR); |
| 1890 | if (bmsr < 0) |
| 1891 | return bmsr; |
| 1892 | |
| 1893 | /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all |
| 1894 | * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a |
| 1895 | * logical 1. |
| 1896 | */ |
| 1897 | if (!(bmsr & BMSR_ESTATEN)) |
| 1898 | return changed; |
| 1899 | |
| 1900 | adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising); |
| 1901 | |
| 1902 | err = phy_modify_changed(phydev, MII_CTRL1000, |
| 1903 | ADVERTISE_1000FULL | ADVERTISE_1000HALF, |
| 1904 | adv); |
| 1905 | if (err < 0) |
| 1906 | return err; |
| 1907 | if (err > 0) |
| 1908 | changed = 1; |
| 1909 | |
| 1910 | return changed; |
| 1911 | } |
| 1912 | |
| 1913 | /** |
| 1914 | * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters |
| 1915 | * @phydev: target phy_device struct |
| 1916 | * |
| 1917 | * Description: Writes MII_ADVERTISE with the appropriate values, |
| 1918 | * after sanitizing the values to make sure we only advertise |
| 1919 | * what is supported. Returns < 0 on error, 0 if the PHY's advertisement |
| 1920 | * hasn't changed, and > 0 if it has changed. This function is intended |
| 1921 | * for Clause 37 1000Base-X mode. |
| 1922 | */ |
| 1923 | static int genphy_c37_config_advert(struct phy_device *phydev) |
| 1924 | { |
| 1925 | u16 adv = 0; |
| 1926 | |
| 1927 | /* Only allow advertising what this PHY supports */ |
| 1928 | linkmode_and(phydev->advertising, phydev->advertising, |
| 1929 | phydev->supported); |
| 1930 | |
| 1931 | if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, |
| 1932 | phydev->advertising)) |
| 1933 | adv |= ADVERTISE_1000XFULL; |
| 1934 | if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, |
| 1935 | phydev->advertising)) |
| 1936 | adv |= ADVERTISE_1000XPAUSE; |
| 1937 | if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, |
| 1938 | phydev->advertising)) |
| 1939 | adv |= ADVERTISE_1000XPSE_ASYM; |
| 1940 | |
| 1941 | return phy_modify_changed(phydev, MII_ADVERTISE, |
| 1942 | ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE | |
| 1943 | ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM, |
| 1944 | adv); |
| 1945 | } |
| 1946 | |
| 1947 | /** |
| 1948 | * genphy_config_eee_advert - disable unwanted eee mode advertisement |
| 1949 | * @phydev: target phy_device struct |
| 1950 | * |
| 1951 | * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy |
| 1952 | * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't |
| 1953 | * changed, and 1 if it has changed. |
| 1954 | */ |
| 1955 | int genphy_config_eee_advert(struct phy_device *phydev) |
| 1956 | { |
| 1957 | int err; |
| 1958 | |
| 1959 | /* Nothing to disable */ |
| 1960 | if (!phydev->eee_broken_modes) |
| 1961 | return 0; |
| 1962 | |
| 1963 | err = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, |
| 1964 | phydev->eee_broken_modes, 0); |
| 1965 | /* If the call failed, we assume that EEE is not supported */ |
| 1966 | return err < 0 ? 0 : err; |
| 1967 | } |
| 1968 | EXPORT_SYMBOL(genphy_config_eee_advert); |
| 1969 | |
| 1970 | /** |
| 1971 | * genphy_setup_forced - configures/forces speed/duplex from @phydev |
| 1972 | * @phydev: target phy_device struct |
| 1973 | * |
| 1974 | * Description: Configures MII_BMCR to force speed/duplex |
| 1975 | * to the values in phydev. Assumes that the values are valid. |
| 1976 | * Please see phy_sanitize_settings(). |
| 1977 | */ |
| 1978 | int genphy_setup_forced(struct phy_device *phydev) |
| 1979 | { |
| 1980 | u16 ctl = 0; |
| 1981 | |
| 1982 | phydev->pause = 0; |
| 1983 | phydev->asym_pause = 0; |
| 1984 | |
| 1985 | if (SPEED_1000 == phydev->speed) |
| 1986 | ctl |= BMCR_SPEED1000; |
| 1987 | else if (SPEED_100 == phydev->speed) |
| 1988 | ctl |= BMCR_SPEED100; |
| 1989 | |
| 1990 | if (DUPLEX_FULL == phydev->duplex) |
| 1991 | ctl |= BMCR_FULLDPLX; |
| 1992 | |
| 1993 | return phy_modify(phydev, MII_BMCR, |
| 1994 | ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl); |
| 1995 | } |
| 1996 | EXPORT_SYMBOL(genphy_setup_forced); |
| 1997 | |
| 1998 | static int genphy_setup_master_slave(struct phy_device *phydev) |
| 1999 | { |
| 2000 | u16 ctl = 0; |
| 2001 | |
| 2002 | if (!phydev->is_gigabit_capable) |
| 2003 | return 0; |
| 2004 | |
| 2005 | switch (phydev->master_slave_set) { |
| 2006 | case MASTER_SLAVE_CFG_MASTER_PREFERRED: |
| 2007 | ctl |= CTL1000_PREFER_MASTER; |
| 2008 | break; |
| 2009 | case MASTER_SLAVE_CFG_SLAVE_PREFERRED: |
| 2010 | break; |
| 2011 | case MASTER_SLAVE_CFG_MASTER_FORCE: |
| 2012 | ctl |= CTL1000_AS_MASTER; |
| 2013 | fallthrough; |
| 2014 | case MASTER_SLAVE_CFG_SLAVE_FORCE: |
| 2015 | ctl |= CTL1000_ENABLE_MASTER; |
| 2016 | break; |
| 2017 | case MASTER_SLAVE_CFG_UNKNOWN: |
| 2018 | case MASTER_SLAVE_CFG_UNSUPPORTED: |
| 2019 | return 0; |
| 2020 | default: |
| 2021 | phydev_warn(phydev, "Unsupported Master/Slave mode\n"); |
| 2022 | return -EOPNOTSUPP; |
| 2023 | } |
| 2024 | |
| 2025 | return phy_modify_changed(phydev, MII_CTRL1000, |
| 2026 | (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER | |
| 2027 | CTL1000_PREFER_MASTER), ctl); |
| 2028 | } |
| 2029 | |
| 2030 | static int genphy_read_master_slave(struct phy_device *phydev) |
| 2031 | { |
| 2032 | int cfg, state; |
| 2033 | int val; |
| 2034 | |
| 2035 | if (!phydev->is_gigabit_capable) { |
| 2036 | phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED; |
| 2037 | phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED; |
| 2038 | return 0; |
| 2039 | } |
| 2040 | |
| 2041 | phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN; |
| 2042 | phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN; |
| 2043 | |
| 2044 | val = phy_read(phydev, MII_CTRL1000); |
| 2045 | if (val < 0) |
| 2046 | return val; |
| 2047 | |
| 2048 | if (val & CTL1000_ENABLE_MASTER) { |
| 2049 | if (val & CTL1000_AS_MASTER) |
| 2050 | cfg = MASTER_SLAVE_CFG_MASTER_FORCE; |
| 2051 | else |
| 2052 | cfg = MASTER_SLAVE_CFG_SLAVE_FORCE; |
| 2053 | } else { |
| 2054 | if (val & CTL1000_PREFER_MASTER) |
| 2055 | cfg = MASTER_SLAVE_CFG_MASTER_PREFERRED; |
| 2056 | else |
| 2057 | cfg = MASTER_SLAVE_CFG_SLAVE_PREFERRED; |
| 2058 | } |
| 2059 | |
| 2060 | val = phy_read(phydev, MII_STAT1000); |
| 2061 | if (val < 0) |
| 2062 | return val; |
| 2063 | |
| 2064 | if (val & LPA_1000MSFAIL) { |
| 2065 | state = MASTER_SLAVE_STATE_ERR; |
| 2066 | } else if (phydev->link) { |
| 2067 | /* this bits are valid only for active link */ |
| 2068 | if (val & LPA_1000MSRES) |
| 2069 | state = MASTER_SLAVE_STATE_MASTER; |
| 2070 | else |
| 2071 | state = MASTER_SLAVE_STATE_SLAVE; |
| 2072 | } else { |
| 2073 | state = MASTER_SLAVE_STATE_UNKNOWN; |
| 2074 | } |
| 2075 | |
| 2076 | phydev->master_slave_get = cfg; |
| 2077 | phydev->master_slave_state = state; |
| 2078 | |
| 2079 | return 0; |
| 2080 | } |
| 2081 | |
| 2082 | /** |
| 2083 | * genphy_restart_aneg - Enable and Restart Autonegotiation |
| 2084 | * @phydev: target phy_device struct |
| 2085 | */ |
| 2086 | int genphy_restart_aneg(struct phy_device *phydev) |
| 2087 | { |
| 2088 | /* Don't isolate the PHY if we're negotiating */ |
| 2089 | return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, |
| 2090 | BMCR_ANENABLE | BMCR_ANRESTART); |
| 2091 | } |
| 2092 | EXPORT_SYMBOL(genphy_restart_aneg); |
| 2093 | |
| 2094 | /** |
| 2095 | * genphy_check_and_restart_aneg - Enable and restart auto-negotiation |
| 2096 | * @phydev: target phy_device struct |
| 2097 | * @restart: whether aneg restart is requested |
| 2098 | * |
| 2099 | * Check, and restart auto-negotiation if needed. |
| 2100 | */ |
| 2101 | int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart) |
| 2102 | { |
| 2103 | int ret; |
| 2104 | |
| 2105 | if (!restart) { |
| 2106 | /* Advertisement hasn't changed, but maybe aneg was never on to |
| 2107 | * begin with? Or maybe phy was isolated? |
| 2108 | */ |
| 2109 | ret = phy_read(phydev, MII_BMCR); |
| 2110 | if (ret < 0) |
| 2111 | return ret; |
| 2112 | |
| 2113 | if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE)) |
| 2114 | restart = true; |
| 2115 | } |
| 2116 | |
| 2117 | if (restart) |
| 2118 | return genphy_restart_aneg(phydev); |
| 2119 | |
| 2120 | return 0; |
| 2121 | } |
| 2122 | EXPORT_SYMBOL(genphy_check_and_restart_aneg); |
| 2123 | |
| 2124 | /** |
| 2125 | * __genphy_config_aneg - restart auto-negotiation or write BMCR |
| 2126 | * @phydev: target phy_device struct |
| 2127 | * @changed: whether autoneg is requested |
| 2128 | * |
| 2129 | * Description: If auto-negotiation is enabled, we configure the |
| 2130 | * advertising, and then restart auto-negotiation. If it is not |
| 2131 | * enabled, then we write the BMCR. |
| 2132 | */ |
| 2133 | int __genphy_config_aneg(struct phy_device *phydev, bool changed) |
| 2134 | { |
| 2135 | int err; |
| 2136 | |
| 2137 | if (genphy_config_eee_advert(phydev)) |
| 2138 | changed = true; |
| 2139 | |
| 2140 | err = genphy_setup_master_slave(phydev); |
| 2141 | if (err < 0) |
| 2142 | return err; |
| 2143 | else if (err) |
| 2144 | changed = true; |
| 2145 | |
| 2146 | if (AUTONEG_ENABLE != phydev->autoneg) |
| 2147 | return genphy_setup_forced(phydev); |
| 2148 | |
| 2149 | err = genphy_config_advert(phydev); |
| 2150 | if (err < 0) /* error */ |
| 2151 | return err; |
| 2152 | else if (err) |
| 2153 | changed = true; |
| 2154 | |
| 2155 | return genphy_check_and_restart_aneg(phydev, changed); |
| 2156 | } |
| 2157 | EXPORT_SYMBOL(__genphy_config_aneg); |
| 2158 | |
| 2159 | /** |
| 2160 | * genphy_c37_config_aneg - restart auto-negotiation or write BMCR |
| 2161 | * @phydev: target phy_device struct |
| 2162 | * |
| 2163 | * Description: If auto-negotiation is enabled, we configure the |
| 2164 | * advertising, and then restart auto-negotiation. If it is not |
| 2165 | * enabled, then we write the BMCR. This function is intended |
| 2166 | * for use with Clause 37 1000Base-X mode. |
| 2167 | */ |
| 2168 | int genphy_c37_config_aneg(struct phy_device *phydev) |
| 2169 | { |
| 2170 | int err, changed; |
| 2171 | |
| 2172 | if (phydev->autoneg != AUTONEG_ENABLE) |
| 2173 | return genphy_setup_forced(phydev); |
| 2174 | |
| 2175 | err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100, |
| 2176 | BMCR_SPEED1000); |
| 2177 | if (err) |
| 2178 | return err; |
| 2179 | |
| 2180 | changed = genphy_c37_config_advert(phydev); |
| 2181 | if (changed < 0) /* error */ |
| 2182 | return changed; |
| 2183 | |
| 2184 | if (!changed) { |
| 2185 | /* Advertisement hasn't changed, but maybe aneg was never on to |
| 2186 | * begin with? Or maybe phy was isolated? |
| 2187 | */ |
| 2188 | int ctl = phy_read(phydev, MII_BMCR); |
| 2189 | |
| 2190 | if (ctl < 0) |
| 2191 | return ctl; |
| 2192 | |
| 2193 | if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) |
| 2194 | changed = 1; /* do restart aneg */ |
| 2195 | } |
| 2196 | |
| 2197 | /* Only restart aneg if we are advertising something different |
| 2198 | * than we were before. |
| 2199 | */ |
| 2200 | if (changed > 0) |
| 2201 | return genphy_restart_aneg(phydev); |
| 2202 | |
| 2203 | return 0; |
| 2204 | } |
| 2205 | EXPORT_SYMBOL(genphy_c37_config_aneg); |
| 2206 | |
| 2207 | /** |
| 2208 | * genphy_aneg_done - return auto-negotiation status |
| 2209 | * @phydev: target phy_device struct |
| 2210 | * |
| 2211 | * Description: Reads the status register and returns 0 either if |
| 2212 | * auto-negotiation is incomplete, or if there was an error. |
| 2213 | * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. |
| 2214 | */ |
| 2215 | int genphy_aneg_done(struct phy_device *phydev) |
| 2216 | { |
| 2217 | int retval = phy_read(phydev, MII_BMSR); |
| 2218 | |
| 2219 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); |
| 2220 | } |
| 2221 | EXPORT_SYMBOL(genphy_aneg_done); |
| 2222 | |
| 2223 | /** |
| 2224 | * genphy_update_link - update link status in @phydev |
| 2225 | * @phydev: target phy_device struct |
| 2226 | * |
| 2227 | * Description: Update the value in phydev->link to reflect the |
| 2228 | * current link value. In order to do this, we need to read |
| 2229 | * the status register twice, keeping the second value. |
| 2230 | */ |
| 2231 | int genphy_update_link(struct phy_device *phydev) |
| 2232 | { |
| 2233 | int status = 0, bmcr; |
| 2234 | #ifdef CONFIG_MARVELL_88Q1110 //zw.wang phy driver support for Marvell_88q1110 on 20240417 |
| 2235 | bmcr = phy_read_cl(phydev, MII_BMCR); |
| 2236 | #else |
| 2237 | bmcr = phy_read(phydev, MII_BMCR); |
| 2238 | #endif |
| 2239 | if (bmcr < 0) |
| 2240 | return bmcr; |
| 2241 | |
| 2242 | /* Autoneg is being started, therefore disregard BMSR value and |
| 2243 | * report link as down. |
| 2244 | */ |
| 2245 | if (bmcr & BMCR_ANRESTART) |
| 2246 | goto done; |
| 2247 | |
| 2248 | /* The link state is latched low so that momentary link |
| 2249 | * drops can be detected. Do not double-read the status |
| 2250 | * in polling mode to detect such short link drops except |
| 2251 | * the link was already down. |
| 2252 | */ |
| 2253 | if (!phy_polling_mode(phydev) || !phydev->link) { |
| 2254 | #ifdef CONFIG_MARVELL_88Q1110 //zw.wang phy driver support for Marvell_88q1110 on 20240417 |
| 2255 | status = phy_read_cl(phydev, MII_BMSR); |
| 2256 | #else |
| 2257 | status = phy_read(phydev, MII_BMSR); |
| 2258 | #endif |
| 2259 | if (status < 0) |
| 2260 | return status; |
| 2261 | else if (status & BMSR_LSTATUS) |
| 2262 | goto done; |
| 2263 | } |
| 2264 | |
| 2265 | /* Read link and autonegotiation status */ |
| 2266 | #ifdef CONFIG_MARVELL_88Q1110 //zw.wang phy driver support for Marvell_88q1110 on 20240417 |
| 2267 | status = phy_read_cl(phydev, MII_BMSR); |
| 2268 | #else |
| 2269 | status = phy_read(phydev, MII_BMSR); |
| 2270 | #endif |
| 2271 | if (status < 0) |
| 2272 | return status; |
| 2273 | done: |
| 2274 | phydev->link = status & BMSR_LSTATUS ? 1 : 0; |
| 2275 | phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0; |
| 2276 | |
| 2277 | /* Consider the case that autoneg was started and "aneg complete" |
| 2278 | * bit has been reset, but "link up" bit not yet. |
| 2279 | */ |
| 2280 | if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete) |
| 2281 | phydev->link = 0; |
| 2282 | |
| 2283 | return 0; |
| 2284 | } |
| 2285 | EXPORT_SYMBOL(genphy_update_link); |
| 2286 | |
| 2287 | int genphy_read_lpa(struct phy_device *phydev) |
| 2288 | { |
| 2289 | int lpa, lpagb; |
| 2290 | |
| 2291 | if (phydev->autoneg == AUTONEG_ENABLE) { |
| 2292 | if (!phydev->autoneg_complete) { |
| 2293 | mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, |
| 2294 | 0); |
| 2295 | mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0); |
| 2296 | return 0; |
| 2297 | } |
| 2298 | |
| 2299 | if (phydev->is_gigabit_capable) { |
| 2300 | lpagb = phy_read(phydev, MII_STAT1000); |
| 2301 | if (lpagb < 0) |
| 2302 | return lpagb; |
| 2303 | |
| 2304 | if (lpagb & LPA_1000MSFAIL) { |
| 2305 | int adv = phy_read(phydev, MII_CTRL1000); |
| 2306 | |
| 2307 | if (adv < 0) |
| 2308 | return adv; |
| 2309 | |
| 2310 | if (adv & CTL1000_ENABLE_MASTER) |
| 2311 | phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n"); |
| 2312 | else |
| 2313 | phydev_err(phydev, "Master/Slave resolution failed\n"); |
| 2314 | return -ENOLINK; |
| 2315 | } |
| 2316 | |
| 2317 | mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, |
| 2318 | lpagb); |
| 2319 | } |
| 2320 | |
| 2321 | lpa = phy_read(phydev, MII_LPA); |
| 2322 | if (lpa < 0) |
| 2323 | return lpa; |
| 2324 | |
| 2325 | mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa); |
| 2326 | } else { |
| 2327 | linkmode_zero(phydev->lp_advertising); |
| 2328 | } |
| 2329 | |
| 2330 | return 0; |
| 2331 | } |
| 2332 | EXPORT_SYMBOL(genphy_read_lpa); |
| 2333 | |
| 2334 | /** |
| 2335 | * genphy_read_status_fixed - read the link parameters for !aneg mode |
| 2336 | * @phydev: target phy_device struct |
| 2337 | * |
| 2338 | * Read the current duplex and speed state for a PHY operating with |
| 2339 | * autonegotiation disabled. |
| 2340 | */ |
| 2341 | int genphy_read_status_fixed(struct phy_device *phydev) |
| 2342 | { |
| 2343 | #ifdef CONFIG_MARVELL_88Q1110 //zw.wang phy driver support for Marvell_88q1110 on 20240417 |
| 2344 | int bmcr = phy_read_cl(phydev, MII_BMCR); |
| 2345 | #else |
| 2346 | int bmcr = phy_read(phydev, MII_BMCR); |
| 2347 | #endif |
| 2348 | |
| 2349 | if (bmcr < 0) |
| 2350 | return bmcr; |
| 2351 | |
| 2352 | if (bmcr & BMCR_FULLDPLX) |
| 2353 | phydev->duplex = DUPLEX_FULL; |
| 2354 | else |
| 2355 | phydev->duplex = DUPLEX_HALF; |
| 2356 | |
| 2357 | if (bmcr & BMCR_SPEED1000) |
| 2358 | phydev->speed = SPEED_1000; |
| 2359 | else if (bmcr & BMCR_SPEED100) |
| 2360 | phydev->speed = SPEED_100; |
| 2361 | else |
| 2362 | phydev->speed = SPEED_10; |
| 2363 | |
| 2364 | return 0; |
| 2365 | } |
| 2366 | EXPORT_SYMBOL(genphy_read_status_fixed); |
| 2367 | |
| 2368 | /** |
| 2369 | * genphy_read_status - check the link status and update current link state |
| 2370 | * @phydev: target phy_device struct |
| 2371 | * |
| 2372 | * Description: Check the link, then figure out the current state |
| 2373 | * by comparing what we advertise with what the link partner |
| 2374 | * advertises. Start by checking the gigabit possibilities, |
| 2375 | * then move on to 10/100. |
| 2376 | */ |
| 2377 | int genphy_read_status(struct phy_device *phydev) |
| 2378 | { |
| 2379 | int err, old_link = phydev->link; |
| 2380 | |
| 2381 | /* Update the link, but return if there was an error */ |
| 2382 | err = genphy_update_link(phydev); |
| 2383 | if (err) |
| 2384 | return err; |
| 2385 | |
| 2386 | /* why bother the PHY if nothing can have changed */ |
| 2387 | if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) |
| 2388 | return 0; |
| 2389 | |
| 2390 | phydev->speed = SPEED_UNKNOWN; |
| 2391 | phydev->duplex = DUPLEX_UNKNOWN; |
| 2392 | phydev->pause = 0; |
| 2393 | phydev->asym_pause = 0; |
| 2394 | |
| 2395 | err = genphy_read_master_slave(phydev); |
| 2396 | if (err < 0) |
| 2397 | return err; |
| 2398 | |
| 2399 | err = genphy_read_lpa(phydev); |
| 2400 | if (err < 0) |
| 2401 | return err; |
| 2402 | |
| 2403 | if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { |
| 2404 | phy_resolve_aneg_linkmode(phydev); |
| 2405 | } else if (phydev->autoneg == AUTONEG_DISABLE) { |
| 2406 | err = genphy_read_status_fixed(phydev); |
| 2407 | if (err < 0) |
| 2408 | return err; |
| 2409 | } |
| 2410 | |
| 2411 | return 0; |
| 2412 | } |
| 2413 | EXPORT_SYMBOL(genphy_read_status); |
| 2414 | |
| 2415 | /** |
| 2416 | * genphy_c37_read_status - check the link status and update current link state |
| 2417 | * @phydev: target phy_device struct |
| 2418 | * |
| 2419 | * Description: Check the link, then figure out the current state |
| 2420 | * by comparing what we advertise with what the link partner |
| 2421 | * advertises. This function is for Clause 37 1000Base-X mode. |
| 2422 | */ |
| 2423 | int genphy_c37_read_status(struct phy_device *phydev) |
| 2424 | { |
| 2425 | int lpa, err, old_link = phydev->link; |
| 2426 | |
| 2427 | /* Update the link, but return if there was an error */ |
| 2428 | err = genphy_update_link(phydev); |
| 2429 | if (err) |
| 2430 | return err; |
| 2431 | |
| 2432 | /* why bother the PHY if nothing can have changed */ |
| 2433 | if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) |
| 2434 | return 0; |
| 2435 | |
| 2436 | phydev->duplex = DUPLEX_UNKNOWN; |
| 2437 | phydev->pause = 0; |
| 2438 | phydev->asym_pause = 0; |
| 2439 | |
| 2440 | if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { |
| 2441 | lpa = phy_read(phydev, MII_LPA); |
| 2442 | if (lpa < 0) |
| 2443 | return lpa; |
| 2444 | |
| 2445 | linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, |
| 2446 | phydev->lp_advertising, lpa & LPA_LPACK); |
| 2447 | linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, |
| 2448 | phydev->lp_advertising, lpa & LPA_1000XFULL); |
| 2449 | linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, |
| 2450 | phydev->lp_advertising, lpa & LPA_1000XPAUSE); |
| 2451 | linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, |
| 2452 | phydev->lp_advertising, |
| 2453 | lpa & LPA_1000XPAUSE_ASYM); |
| 2454 | |
| 2455 | phy_resolve_aneg_linkmode(phydev); |
| 2456 | } else if (phydev->autoneg == AUTONEG_DISABLE) { |
| 2457 | int bmcr = phy_read(phydev, MII_BMCR); |
| 2458 | |
| 2459 | if (bmcr < 0) |
| 2460 | return bmcr; |
| 2461 | |
| 2462 | if (bmcr & BMCR_FULLDPLX) |
| 2463 | phydev->duplex = DUPLEX_FULL; |
| 2464 | else |
| 2465 | phydev->duplex = DUPLEX_HALF; |
| 2466 | } |
| 2467 | |
| 2468 | return 0; |
| 2469 | } |
| 2470 | EXPORT_SYMBOL(genphy_c37_read_status); |
| 2471 | |
| 2472 | /** |
| 2473 | * genphy_soft_reset - software reset the PHY via BMCR_RESET bit |
| 2474 | * @phydev: target phy_device struct |
| 2475 | * |
| 2476 | * Description: Perform a software PHY reset using the standard |
| 2477 | * BMCR_RESET bit and poll for the reset bit to be cleared. |
| 2478 | * |
| 2479 | * Returns: 0 on success, < 0 on failure |
| 2480 | */ |
| 2481 | int genphy_soft_reset(struct phy_device *phydev) |
| 2482 | { |
| 2483 | u16 res = BMCR_RESET; |
| 2484 | int ret; |
| 2485 | |
| 2486 | if (phydev->autoneg == AUTONEG_ENABLE) |
| 2487 | res |= BMCR_ANRESTART; |
| 2488 | |
| 2489 | ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res); |
| 2490 | if (ret < 0) |
| 2491 | return ret; |
| 2492 | |
| 2493 | /* Clause 22 states that setting bit BMCR_RESET sets control registers |
| 2494 | * to their default value. Therefore the POWER DOWN bit is supposed to |
| 2495 | * be cleared after soft reset. |
| 2496 | */ |
| 2497 | phydev->suspended = 0; |
| 2498 | |
| 2499 | ret = phy_poll_reset(phydev); |
| 2500 | if (ret) |
| 2501 | return ret; |
| 2502 | |
| 2503 | /* BMCR may be reset to defaults */ |
| 2504 | if (phydev->autoneg == AUTONEG_DISABLE) |
| 2505 | ret = genphy_setup_forced(phydev); |
| 2506 | |
| 2507 | return ret; |
| 2508 | } |
| 2509 | EXPORT_SYMBOL(genphy_soft_reset); |
| 2510 | |
| 2511 | /** |
| 2512 | * genphy_read_abilities - read PHY abilities from Clause 22 registers |
| 2513 | * @phydev: target phy_device struct |
| 2514 | * |
| 2515 | * Description: Reads the PHY's abilities and populates |
| 2516 | * phydev->supported accordingly. |
| 2517 | * |
| 2518 | * Returns: 0 on success, < 0 on failure |
| 2519 | */ |
| 2520 | int genphy_read_abilities(struct phy_device *phydev) |
| 2521 | { |
| 2522 | int val; |
| 2523 | |
| 2524 | linkmode_set_bit_array(phy_basic_ports_array, |
| 2525 | ARRAY_SIZE(phy_basic_ports_array), |
| 2526 | phydev->supported); |
| 2527 | |
| 2528 | val = phy_read(phydev, MII_BMSR); |
| 2529 | if (val < 0) |
| 2530 | return val; |
| 2531 | |
| 2532 | linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported, |
| 2533 | val & BMSR_ANEGCAPABLE); |
| 2534 | |
| 2535 | linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported, |
| 2536 | val & BMSR_100FULL); |
| 2537 | linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported, |
| 2538 | val & BMSR_100HALF); |
| 2539 | linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported, |
| 2540 | val & BMSR_10FULL); |
| 2541 | linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported, |
| 2542 | val & BMSR_10HALF); |
| 2543 | |
| 2544 | if (val & BMSR_ESTATEN) { |
| 2545 | val = phy_read(phydev, MII_ESTATUS); |
| 2546 | if (val < 0) |
| 2547 | return val; |
| 2548 | |
| 2549 | linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, |
| 2550 | phydev->supported, val & ESTATUS_1000_TFULL); |
| 2551 | linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, |
| 2552 | phydev->supported, val & ESTATUS_1000_THALF); |
| 2553 | linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, |
| 2554 | phydev->supported, val & ESTATUS_1000_XFULL); |
| 2555 | } |
| 2556 | |
| 2557 | return 0; |
| 2558 | } |
| 2559 | EXPORT_SYMBOL(genphy_read_abilities); |
| 2560 | |
| 2561 | /* This is used for the phy device which doesn't support the MMD extended |
| 2562 | * register access, but it does have side effect when we are trying to access |
| 2563 | * the MMD register via indirect method. |
| 2564 | */ |
| 2565 | int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum) |
| 2566 | { |
| 2567 | return -EOPNOTSUPP; |
| 2568 | } |
| 2569 | EXPORT_SYMBOL(genphy_read_mmd_unsupported); |
| 2570 | |
| 2571 | int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum, |
| 2572 | u16 regnum, u16 val) |
| 2573 | { |
| 2574 | return -EOPNOTSUPP; |
| 2575 | } |
| 2576 | EXPORT_SYMBOL(genphy_write_mmd_unsupported); |
| 2577 | |
| 2578 | int genphy_suspend(struct phy_device *phydev) |
| 2579 | { |
| 2580 | return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN); |
| 2581 | } |
| 2582 | EXPORT_SYMBOL(genphy_suspend); |
| 2583 | |
| 2584 | int genphy_resume(struct phy_device *phydev) |
| 2585 | { |
| 2586 | return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN); |
| 2587 | } |
| 2588 | EXPORT_SYMBOL(genphy_resume); |
| 2589 | |
| 2590 | int genphy_loopback(struct phy_device *phydev, bool enable) |
| 2591 | { |
| 2592 | return phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, |
| 2593 | enable ? BMCR_LOOPBACK : 0); |
| 2594 | } |
| 2595 | EXPORT_SYMBOL(genphy_loopback); |
| 2596 | |
| 2597 | /** |
| 2598 | * phy_remove_link_mode - Remove a supported link mode |
| 2599 | * @phydev: phy_device structure to remove link mode from |
| 2600 | * @link_mode: Link mode to be removed |
| 2601 | * |
| 2602 | * Description: Some MACs don't support all link modes which the PHY |
| 2603 | * does. e.g. a 1G MAC often does not support 1000Half. Add a helper |
| 2604 | * to remove a link mode. |
| 2605 | */ |
| 2606 | void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode) |
| 2607 | { |
| 2608 | linkmode_clear_bit(link_mode, phydev->supported); |
| 2609 | phy_advertise_supported(phydev); |
| 2610 | } |
| 2611 | EXPORT_SYMBOL(phy_remove_link_mode); |
| 2612 | |
| 2613 | static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src) |
| 2614 | { |
| 2615 | linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst, |
| 2616 | linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src)); |
| 2617 | linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst, |
| 2618 | linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src)); |
| 2619 | } |
| 2620 | |
| 2621 | /** |
| 2622 | * phy_advertise_supported - Advertise all supported modes |
| 2623 | * @phydev: target phy_device struct |
| 2624 | * |
| 2625 | * Description: Called to advertise all supported modes, doesn't touch |
| 2626 | * pause mode advertising. |
| 2627 | */ |
| 2628 | void phy_advertise_supported(struct phy_device *phydev) |
| 2629 | { |
| 2630 | __ETHTOOL_DECLARE_LINK_MODE_MASK(new); |
| 2631 | |
| 2632 | linkmode_copy(new, phydev->supported); |
| 2633 | phy_copy_pause_bits(new, phydev->advertising); |
| 2634 | linkmode_copy(phydev->advertising, new); |
| 2635 | } |
| 2636 | EXPORT_SYMBOL(phy_advertise_supported); |
| 2637 | |
| 2638 | /** |
| 2639 | * phy_support_sym_pause - Enable support of symmetrical pause |
| 2640 | * @phydev: target phy_device struct |
| 2641 | * |
| 2642 | * Description: Called by the MAC to indicate is supports symmetrical |
| 2643 | * Pause, but not asym pause. |
| 2644 | */ |
| 2645 | void phy_support_sym_pause(struct phy_device *phydev) |
| 2646 | { |
| 2647 | linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported); |
| 2648 | phy_copy_pause_bits(phydev->advertising, phydev->supported); |
| 2649 | } |
| 2650 | EXPORT_SYMBOL(phy_support_sym_pause); |
| 2651 | |
| 2652 | /** |
| 2653 | * phy_support_asym_pause - Enable support of asym pause |
| 2654 | * @phydev: target phy_device struct |
| 2655 | * |
| 2656 | * Description: Called by the MAC to indicate is supports Asym Pause. |
| 2657 | */ |
| 2658 | void phy_support_asym_pause(struct phy_device *phydev) |
| 2659 | { |
| 2660 | phy_copy_pause_bits(phydev->advertising, phydev->supported); |
| 2661 | } |
| 2662 | EXPORT_SYMBOL(phy_support_asym_pause); |
| 2663 | |
| 2664 | /** |
| 2665 | * phy_set_sym_pause - Configure symmetric Pause |
| 2666 | * @phydev: target phy_device struct |
| 2667 | * @rx: Receiver Pause is supported |
| 2668 | * @tx: Transmit Pause is supported |
| 2669 | * @autoneg: Auto neg should be used |
| 2670 | * |
| 2671 | * Description: Configure advertised Pause support depending on if |
| 2672 | * receiver pause and pause auto neg is supported. Generally called |
| 2673 | * from the set_pauseparam .ndo. |
| 2674 | */ |
| 2675 | void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx, |
| 2676 | bool autoneg) |
| 2677 | { |
| 2678 | linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported); |
| 2679 | |
| 2680 | if (rx && tx && autoneg) |
| 2681 | linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, |
| 2682 | phydev->supported); |
| 2683 | |
| 2684 | linkmode_copy(phydev->advertising, phydev->supported); |
| 2685 | } |
| 2686 | EXPORT_SYMBOL(phy_set_sym_pause); |
| 2687 | |
| 2688 | /** |
| 2689 | * phy_set_asym_pause - Configure Pause and Asym Pause |
| 2690 | * @phydev: target phy_device struct |
| 2691 | * @rx: Receiver Pause is supported |
| 2692 | * @tx: Transmit Pause is supported |
| 2693 | * |
| 2694 | * Description: Configure advertised Pause support depending on if |
| 2695 | * transmit and receiver pause is supported. If there has been a |
| 2696 | * change in adverting, trigger a new autoneg. Generally called from |
| 2697 | * the set_pauseparam .ndo. |
| 2698 | */ |
| 2699 | void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx) |
| 2700 | { |
| 2701 | __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv); |
| 2702 | |
| 2703 | linkmode_copy(oldadv, phydev->advertising); |
| 2704 | linkmode_set_pause(phydev->advertising, tx, rx); |
| 2705 | |
| 2706 | if (!linkmode_equal(oldadv, phydev->advertising) && |
| 2707 | phydev->autoneg) |
| 2708 | phy_start_aneg(phydev); |
| 2709 | } |
| 2710 | EXPORT_SYMBOL(phy_set_asym_pause); |
| 2711 | |
| 2712 | /** |
| 2713 | * phy_validate_pause - Test if the PHY/MAC support the pause configuration |
| 2714 | * @phydev: phy_device struct |
| 2715 | * @pp: requested pause configuration |
| 2716 | * |
| 2717 | * Description: Test if the PHY/MAC combination supports the Pause |
| 2718 | * configuration the user is requesting. Returns True if it is |
| 2719 | * supported, false otherwise. |
| 2720 | */ |
| 2721 | bool phy_validate_pause(struct phy_device *phydev, |
| 2722 | struct ethtool_pauseparam *pp) |
| 2723 | { |
| 2724 | if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, |
| 2725 | phydev->supported) && pp->rx_pause) |
| 2726 | return false; |
| 2727 | |
| 2728 | if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, |
| 2729 | phydev->supported) && |
| 2730 | pp->rx_pause != pp->tx_pause) |
| 2731 | return false; |
| 2732 | |
| 2733 | return true; |
| 2734 | } |
| 2735 | EXPORT_SYMBOL(phy_validate_pause); |
| 2736 | |
| 2737 | /** |
| 2738 | * phy_get_pause - resolve negotiated pause modes |
| 2739 | * @phydev: phy_device struct |
| 2740 | * @tx_pause: pointer to bool to indicate whether transmit pause should be |
| 2741 | * enabled. |
| 2742 | * @rx_pause: pointer to bool to indicate whether receive pause should be |
| 2743 | * enabled. |
| 2744 | * |
| 2745 | * Resolve and return the flow control modes according to the negotiation |
| 2746 | * result. This includes checking that we are operating in full duplex mode. |
| 2747 | * See linkmode_resolve_pause() for further details. |
| 2748 | */ |
| 2749 | void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause) |
| 2750 | { |
| 2751 | if (phydev->duplex != DUPLEX_FULL) { |
| 2752 | *tx_pause = false; |
| 2753 | *rx_pause = false; |
| 2754 | return; |
| 2755 | } |
| 2756 | |
| 2757 | return linkmode_resolve_pause(phydev->advertising, |
| 2758 | phydev->lp_advertising, |
| 2759 | tx_pause, rx_pause); |
| 2760 | } |
| 2761 | EXPORT_SYMBOL(phy_get_pause); |
| 2762 | |
| 2763 | #if IS_ENABLED(CONFIG_OF_MDIO) |
| 2764 | static int phy_get_int_delay_property(struct device *dev, const char *name) |
| 2765 | { |
| 2766 | s32 int_delay; |
| 2767 | int ret; |
| 2768 | |
| 2769 | ret = device_property_read_u32(dev, name, &int_delay); |
| 2770 | if (ret) |
| 2771 | return ret; |
| 2772 | |
| 2773 | return int_delay; |
| 2774 | } |
| 2775 | #else |
| 2776 | static int phy_get_int_delay_property(struct device *dev, const char *name) |
| 2777 | { |
| 2778 | return -EINVAL; |
| 2779 | } |
| 2780 | #endif |
| 2781 | |
| 2782 | /** |
| 2783 | * phy_get_delay_index - returns the index of the internal delay |
| 2784 | * @phydev: phy_device struct |
| 2785 | * @dev: pointer to the devices device struct |
| 2786 | * @delay_values: array of delays the PHY supports |
| 2787 | * @size: the size of the delay array |
| 2788 | * @is_rx: boolean to indicate to get the rx internal delay |
| 2789 | * |
| 2790 | * Returns the index within the array of internal delay passed in. |
| 2791 | * If the device property is not present then the interface type is checked |
| 2792 | * if the interface defines use of internal delay then a 1 is returned otherwise |
| 2793 | * a 0 is returned. |
| 2794 | * The array must be in ascending order. If PHY does not have an ascending order |
| 2795 | * array then size = 0 and the value of the delay property is returned. |
| 2796 | * Return -EINVAL if the delay is invalid or cannot be found. |
| 2797 | */ |
| 2798 | s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev, |
| 2799 | const int *delay_values, int size, bool is_rx) |
| 2800 | { |
| 2801 | s32 delay; |
| 2802 | int i; |
| 2803 | |
| 2804 | if (is_rx) { |
| 2805 | delay = phy_get_int_delay_property(dev, "rx-internal-delay-ps"); |
| 2806 | if (delay < 0 && size == 0) { |
| 2807 | if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || |
| 2808 | phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) |
| 2809 | return 1; |
| 2810 | else |
| 2811 | return 0; |
| 2812 | } |
| 2813 | |
| 2814 | } else { |
| 2815 | delay = phy_get_int_delay_property(dev, "tx-internal-delay-ps"); |
| 2816 | if (delay < 0 && size == 0) { |
| 2817 | if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || |
| 2818 | phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) |
| 2819 | return 1; |
| 2820 | else |
| 2821 | return 0; |
| 2822 | } |
| 2823 | } |
| 2824 | |
| 2825 | if (delay < 0) |
| 2826 | return delay; |
| 2827 | |
xf.li | 6b423c7 | 2025-03-14 00:07:42 -0700 | [diff] [blame^] | 2828 | if (size == 0) |
xf.li | ed996a2 | 2025-03-13 23:49:05 -0700 | [diff] [blame] | 2829 | return delay; |
| 2830 | |
| 2831 | if (delay < delay_values[0] || delay > delay_values[size - 1]) { |
| 2832 | phydev_err(phydev, "Delay %d is out of range\n", delay); |
| 2833 | return -EINVAL; |
| 2834 | } |
| 2835 | |
| 2836 | if (delay == delay_values[0]) |
| 2837 | return 0; |
| 2838 | |
| 2839 | for (i = 1; i < size; i++) { |
| 2840 | if (delay == delay_values[i]) |
| 2841 | return i; |
| 2842 | |
| 2843 | /* Find an approximate index by looking up the table */ |
| 2844 | if (delay > delay_values[i - 1] && |
| 2845 | delay < delay_values[i]) { |
| 2846 | if (delay - delay_values[i - 1] < |
| 2847 | delay_values[i] - delay) |
| 2848 | return i - 1; |
| 2849 | else |
| 2850 | return i; |
| 2851 | } |
| 2852 | } |
| 2853 | |
| 2854 | phydev_err(phydev, "error finding internal delay index for %d\n", |
| 2855 | delay); |
| 2856 | |
| 2857 | return -EINVAL; |
| 2858 | } |
| 2859 | EXPORT_SYMBOL(phy_get_internal_delay); |
| 2860 | |
xf.li | ed996a2 | 2025-03-13 23:49:05 -0700 | [diff] [blame] | 2861 | |
| 2862 | /** |
| 2863 | * phy_probe - probe and init a PHY device |
| 2864 | * @dev: device to probe and init |
| 2865 | * |
| 2866 | * Description: Take care of setting up the phy_device structure, |
| 2867 | * set the state to READY (the driver's init function should |
| 2868 | * set it to STARTING if needed). |
| 2869 | */ |
| 2870 | static int phy_probe(struct device *dev) |
| 2871 | { |
| 2872 | struct phy_device *phydev = to_phy_device(dev); |
| 2873 | struct device_driver *drv = phydev->mdio.dev.driver; |
| 2874 | struct phy_driver *phydrv = to_phy_driver(drv); |
| 2875 | int err = 0; |
| 2876 | |
| 2877 | phydev->drv = phydrv; |
| 2878 | |
| 2879 | /* Disable the interrupt if the PHY doesn't support it |
| 2880 | * but the interrupt is still a valid one |
| 2881 | */ |
| 2882 | if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev)) |
| 2883 | phydev->irq = PHY_POLL; |
| 2884 | |
| 2885 | if (phydrv->flags & PHY_IS_INTERNAL) |
| 2886 | phydev->is_internal = true; |
| 2887 | |
| 2888 | mutex_lock(&phydev->lock); |
| 2889 | |
| 2890 | /* Deassert the reset signal */ |
| 2891 | phy_device_reset(phydev, 0); |
| 2892 | |
| 2893 | if (phydev->drv->probe) { |
| 2894 | err = phydev->drv->probe(phydev); |
| 2895 | if (err) |
| 2896 | goto out; |
| 2897 | } |
| 2898 | |
| 2899 | /* Start out supporting everything. Eventually, |
| 2900 | * a controller will attach, and may modify one |
| 2901 | * or both of these values |
| 2902 | */ |
| 2903 | if (phydrv->features) { |
| 2904 | linkmode_copy(phydev->supported, phydrv->features); |
| 2905 | } else if (phydrv->get_features) { |
| 2906 | err = phydrv->get_features(phydev); |
| 2907 | } else if (phydev->is_c45) { |
| 2908 | err = genphy_c45_pma_read_abilities(phydev); |
| 2909 | } else { |
| 2910 | err = genphy_read_abilities(phydev); |
| 2911 | } |
| 2912 | |
| 2913 | if (err) |
| 2914 | goto out; |
| 2915 | |
| 2916 | if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, |
| 2917 | phydev->supported)) |
| 2918 | phydev->autoneg = 0; |
| 2919 | |
| 2920 | if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, |
| 2921 | phydev->supported)) |
| 2922 | phydev->is_gigabit_capable = 1; |
| 2923 | if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, |
| 2924 | phydev->supported)) |
| 2925 | phydev->is_gigabit_capable = 1; |
| 2926 | |
| 2927 | of_set_phy_supported(phydev); |
| 2928 | phy_advertise_supported(phydev); |
| 2929 | |
| 2930 | /* Get the EEE modes we want to prohibit. We will ask |
| 2931 | * the PHY stop advertising these mode later on |
| 2932 | */ |
| 2933 | of_set_phy_eee_broken(phydev); |
| 2934 | |
| 2935 | /* The Pause Frame bits indicate that the PHY can support passing |
| 2936 | * pause frames. During autonegotiation, the PHYs will determine if |
| 2937 | * they should allow pause frames to pass. The MAC driver should then |
| 2938 | * use that result to determine whether to enable flow control via |
| 2939 | * pause frames. |
| 2940 | * |
| 2941 | * Normally, PHY drivers should not set the Pause bits, and instead |
| 2942 | * allow phylib to do that. However, there may be some situations |
| 2943 | * (e.g. hardware erratum) where the driver wants to set only one |
| 2944 | * of these bits. |
| 2945 | */ |
| 2946 | if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) && |
| 2947 | !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) { |
| 2948 | linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, |
| 2949 | phydev->supported); |
| 2950 | linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, |
| 2951 | phydev->supported); |
| 2952 | } |
| 2953 | |
| 2954 | /* Set the state to READY by default */ |
| 2955 | phydev->state = PHY_READY; |
| 2956 | |
| 2957 | out: |
| 2958 | /* Assert the reset signal */ |
| 2959 | if (err) |
| 2960 | phy_device_reset(phydev, 1); |
| 2961 | |
| 2962 | mutex_unlock(&phydev->lock); |
| 2963 | |
| 2964 | return err; |
| 2965 | } |
| 2966 | |
| 2967 | static int phy_remove(struct device *dev) |
| 2968 | { |
| 2969 | struct phy_device *phydev = to_phy_device(dev); |
| 2970 | |
| 2971 | cancel_delayed_work_sync(&phydev->state_queue); |
| 2972 | |
| 2973 | mutex_lock(&phydev->lock); |
| 2974 | phydev->state = PHY_DOWN; |
| 2975 | mutex_unlock(&phydev->lock); |
| 2976 | |
| 2977 | sfp_bus_del_upstream(phydev->sfp_bus); |
| 2978 | phydev->sfp_bus = NULL; |
| 2979 | |
| 2980 | if (phydev->drv && phydev->drv->remove) |
| 2981 | phydev->drv->remove(phydev); |
| 2982 | |
| 2983 | /* Assert the reset signal */ |
| 2984 | phy_device_reset(phydev, 1); |
| 2985 | |
| 2986 | phydev->drv = NULL; |
| 2987 | |
| 2988 | return 0; |
| 2989 | } |
| 2990 | |
| 2991 | /** |
| 2992 | * phy_driver_register - register a phy_driver with the PHY layer |
| 2993 | * @new_driver: new phy_driver to register |
| 2994 | * @owner: module owning this PHY |
| 2995 | */ |
| 2996 | int phy_driver_register(struct phy_driver *new_driver, struct module *owner) |
| 2997 | { |
| 2998 | int retval; |
| 2999 | |
| 3000 | /* Either the features are hard coded, or dynamically |
| 3001 | * determined. It cannot be both. |
| 3002 | */ |
| 3003 | if (WARN_ON(new_driver->features && new_driver->get_features)) { |
| 3004 | pr_err("%s: features and get_features must not both be set\n", |
| 3005 | new_driver->name); |
| 3006 | return -EINVAL; |
| 3007 | } |
| 3008 | |
| 3009 | new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY; |
| 3010 | new_driver->mdiodrv.driver.name = new_driver->name; |
| 3011 | new_driver->mdiodrv.driver.bus = &mdio_bus_type; |
| 3012 | new_driver->mdiodrv.driver.probe = phy_probe; |
| 3013 | new_driver->mdiodrv.driver.remove = phy_remove; |
| 3014 | new_driver->mdiodrv.driver.owner = owner; |
| 3015 | new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS; |
| 3016 | |
| 3017 | retval = driver_register(&new_driver->mdiodrv.driver); |
| 3018 | if (retval) { |
| 3019 | pr_err("%s: Error %d in registering driver\n", |
| 3020 | new_driver->name, retval); |
| 3021 | |
| 3022 | return retval; |
| 3023 | } |
| 3024 | |
| 3025 | pr_debug("%s: Registered new driver\n", new_driver->name); |
| 3026 | |
| 3027 | return 0; |
| 3028 | } |
| 3029 | EXPORT_SYMBOL(phy_driver_register); |
| 3030 | |
| 3031 | int phy_drivers_register(struct phy_driver *new_driver, int n, |
| 3032 | struct module *owner) |
| 3033 | { |
| 3034 | int i, ret = 0; |
| 3035 | |
| 3036 | for (i = 0; i < n; i++) { |
| 3037 | ret = phy_driver_register(new_driver + i, owner); |
| 3038 | if (ret) { |
| 3039 | while (i-- > 0) |
| 3040 | phy_driver_unregister(new_driver + i); |
| 3041 | break; |
| 3042 | } |
| 3043 | } |
| 3044 | return ret; |
| 3045 | } |
| 3046 | EXPORT_SYMBOL(phy_drivers_register); |
| 3047 | |
| 3048 | void phy_driver_unregister(struct phy_driver *drv) |
| 3049 | { |
| 3050 | driver_unregister(&drv->mdiodrv.driver); |
| 3051 | } |
| 3052 | EXPORT_SYMBOL(phy_driver_unregister); |
| 3053 | |
| 3054 | void phy_drivers_unregister(struct phy_driver *drv, int n) |
| 3055 | { |
| 3056 | int i; |
| 3057 | |
| 3058 | for (i = 0; i < n; i++) |
| 3059 | phy_driver_unregister(drv + i); |
| 3060 | } |
| 3061 | EXPORT_SYMBOL(phy_drivers_unregister); |
| 3062 | |
| 3063 | static struct phy_driver genphy_driver = { |
| 3064 | .phy_id = 0xffffffff, |
| 3065 | .phy_id_mask = 0xffffffff, |
| 3066 | .name = "Generic PHY", |
| 3067 | .get_features = genphy_read_abilities, |
| 3068 | .suspend = genphy_suspend, |
| 3069 | .resume = genphy_resume, |
| 3070 | .set_loopback = genphy_loopback, |
| 3071 | }; |
| 3072 | |
| 3073 | static const struct ethtool_phy_ops phy_ethtool_phy_ops = { |
| 3074 | .get_sset_count = phy_ethtool_get_sset_count, |
| 3075 | .get_strings = phy_ethtool_get_strings, |
| 3076 | .get_stats = phy_ethtool_get_stats, |
| 3077 | .start_cable_test = phy_start_cable_test, |
| 3078 | .start_cable_test_tdr = phy_start_cable_test_tdr, |
| 3079 | }; |
| 3080 | |
| 3081 | static int __init phy_init(void) |
| 3082 | { |
| 3083 | int rc; |
| 3084 | |
| 3085 | rc = mdio_bus_init(); |
| 3086 | if (rc) |
| 3087 | return rc; |
| 3088 | |
| 3089 | ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops); |
| 3090 | features_init(); |
| 3091 | |
| 3092 | rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE); |
| 3093 | if (rc) |
| 3094 | goto err_c45; |
| 3095 | |
| 3096 | rc = phy_driver_register(&genphy_driver, THIS_MODULE); |
| 3097 | if (rc) { |
| 3098 | phy_driver_unregister(&genphy_c45_driver); |
| 3099 | err_c45: |
| 3100 | mdio_bus_exit(); |
| 3101 | } |
| 3102 | |
| 3103 | return rc; |
| 3104 | } |
| 3105 | |
| 3106 | static void __exit phy_exit(void) |
| 3107 | { |
| 3108 | phy_driver_unregister(&genphy_c45_driver); |
| 3109 | phy_driver_unregister(&genphy_driver); |
| 3110 | mdio_bus_exit(); |
| 3111 | ethtool_set_ethtool_phy_ops(NULL); |
| 3112 | } |
| 3113 | |
| 3114 | subsys_initcall(phy_init); |
| 3115 | module_exit(phy_exit); |