| 1 | /* Framework for configuring and reading PHY devices |
| 2 | * Based on code in sungem_phy.c and gianfar_phy.c |
| 3 | * |
| 4 | * Author: Andy Fleming |
| 5 | * |
| 6 | * Copyright (c) 2004 Freescale Semiconductor, Inc. |
| 7 | * Copyright (c) 2006, 2007 Maciej W. Rozycki |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU General Public License as published by the |
| 11 | * Free Software Foundation; either version 2 of the License, or (at your |
| 12 | * option) any later version. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 17 | |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/string.h> |
| 20 | #include <linux/errno.h> |
| 21 | #include <linux/unistd.h> |
| 22 | #include <linux/interrupt.h> |
| 23 | #include <linux/delay.h> |
| 24 | #include <linux/netdevice.h> |
| 25 | #include <linux/etherdevice.h> |
| 26 | #include <linux/skbuff.h> |
| 27 | #include <linux/mm.h> |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/mii.h> |
| 30 | #include <linux/ethtool.h> |
| 31 | #include <linux/phy.h> |
| 32 | #include <linux/phy_led_triggers.h> |
| 33 | #include <linux/workqueue.h> |
| 34 | #include <linux/mdio.h> |
| 35 | #include <linux/io.h> |
| 36 | #include <linux/uaccess.h> |
| 37 | #include <linux/atomic.h> |
| 38 | |
| 39 | #include <asm/irq.h> |
| 40 | |
| 41 | #define PHY_STATE_STR(_state) \ |
| 42 | case PHY_##_state: \ |
| 43 | return __stringify(_state); \ |
| 44 | |
| 45 | static const char *phy_state_to_str(enum phy_state st) |
| 46 | { |
| 47 | switch (st) { |
| 48 | PHY_STATE_STR(DOWN) |
| 49 | PHY_STATE_STR(STARTING) |
| 50 | PHY_STATE_STR(READY) |
| 51 | PHY_STATE_STR(PENDING) |
| 52 | PHY_STATE_STR(UP) |
| 53 | PHY_STATE_STR(AN) |
| 54 | PHY_STATE_STR(RUNNING) |
| 55 | PHY_STATE_STR(NOLINK) |
| 56 | PHY_STATE_STR(FORCING) |
| 57 | PHY_STATE_STR(CHANGELINK) |
| 58 | PHY_STATE_STR(HALTED) |
| 59 | PHY_STATE_STR(RESUMING) |
| 60 | } |
| 61 | |
| 62 | return NULL; |
| 63 | } |
| 64 | |
| 65 | |
| 66 | /** |
| 67 | * phy_print_status - Convenience function to print out the current phy status |
| 68 | * @phydev: the phy_device struct |
| 69 | */ |
| 70 | void phy_print_status(struct phy_device *phydev) |
| 71 | { |
| 72 | if (phydev->link) { |
| 73 | netdev_info(phydev->attached_dev, |
| 74 | "Link is Up - %s/%s - flow control %s\n", |
| 75 | phy_speed_to_str(phydev->speed), |
| 76 | phy_duplex_to_str(phydev->duplex), |
| 77 | phydev->pause ? "rx/tx" : "off"); |
| 78 | } else { |
| 79 | netdev_info(phydev->attached_dev, "Link is Down\n"); |
| 80 | } |
| 81 | } |
| 82 | EXPORT_SYMBOL(phy_print_status); |
| 83 | |
| 84 | /** |
| 85 | * phy_clear_interrupt - Ack the phy device's interrupt |
| 86 | * @phydev: the phy_device struct |
| 87 | * |
| 88 | * If the @phydev driver has an ack_interrupt function, call it to |
| 89 | * ack and clear the phy device's interrupt. |
| 90 | * |
| 91 | * Returns 0 on success or < 0 on error. |
| 92 | */ |
| 93 | static int phy_clear_interrupt(struct phy_device *phydev) |
| 94 | { |
| 95 | if (phydev->drv->ack_interrupt) |
| 96 | return phydev->drv->ack_interrupt(phydev); |
| 97 | |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * phy_config_interrupt - configure the PHY device for the requested interrupts |
| 103 | * @phydev: the phy_device struct |
| 104 | * @interrupts: interrupt flags to configure for this @phydev |
| 105 | * |
| 106 | * Returns 0 on success or < 0 on error. |
| 107 | */ |
| 108 | static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts) |
| 109 | { |
| 110 | phydev->interrupts = interrupts; |
| 111 | if (phydev->drv->config_intr) |
| 112 | return phydev->drv->config_intr(phydev); |
| 113 | |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * phy_restart_aneg - restart auto-negotiation |
| 119 | * @phydev: target phy_device struct |
| 120 | * |
| 121 | * Restart the autonegotiation on @phydev. Returns >= 0 on success or |
| 122 | * negative errno on error. |
| 123 | */ |
| 124 | int phy_restart_aneg(struct phy_device *phydev) |
| 125 | { |
| 126 | int ret; |
| 127 | |
| 128 | if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0))) |
| 129 | ret = genphy_c45_restart_aneg(phydev); |
| 130 | else |
| 131 | ret = genphy_restart_aneg(phydev); |
| 132 | |
| 133 | return ret; |
| 134 | } |
| 135 | EXPORT_SYMBOL_GPL(phy_restart_aneg); |
| 136 | |
| 137 | /** |
| 138 | * phy_aneg_done - return auto-negotiation status |
| 139 | * @phydev: target phy_device struct |
| 140 | * |
| 141 | * Description: Return the auto-negotiation status from this @phydev |
| 142 | * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation |
| 143 | * is still pending. |
| 144 | */ |
| 145 | int phy_aneg_done(struct phy_device *phydev) |
| 146 | { |
| 147 | if (phydev->drv && phydev->drv->aneg_done) |
| 148 | return phydev->drv->aneg_done(phydev); |
| 149 | |
| 150 | /* Avoid genphy_aneg_done() if the Clause 45 PHY does not |
| 151 | * implement Clause 22 registers |
| 152 | */ |
| 153 | if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0))) |
| 154 | return -EINVAL; |
| 155 | |
| 156 | return genphy_aneg_done(phydev); |
| 157 | } |
| 158 | EXPORT_SYMBOL(phy_aneg_done); |
| 159 | |
| 160 | /** |
| 161 | * phy_find_valid - find a PHY setting that matches the requested parameters |
| 162 | * @speed: desired speed |
| 163 | * @duplex: desired duplex |
| 164 | * @supported: mask of supported link modes |
| 165 | * |
| 166 | * Locate a supported phy setting that is, in priority order: |
| 167 | * - an exact match for the specified speed and duplex mode |
| 168 | * - a match for the specified speed, or slower speed |
| 169 | * - the slowest supported speed |
| 170 | * Returns the matched phy_setting entry, or %NULL if no supported phy |
| 171 | * settings were found. |
| 172 | */ |
| 173 | static const struct phy_setting * |
| 174 | phy_find_valid(int speed, int duplex, u32 supported) |
| 175 | { |
| 176 | unsigned long mask = supported; |
| 177 | |
| 178 | return phy_lookup_setting(speed, duplex, &mask, BITS_PER_LONG, false); |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * phy_supported_speeds - return all speeds currently supported by a phy device |
| 183 | * @phy: The phy device to return supported speeds of. |
| 184 | * @speeds: buffer to store supported speeds in. |
| 185 | * @size: size of speeds buffer. |
| 186 | * |
| 187 | * Description: Returns the number of supported speeds, and fills the speeds |
| 188 | * buffer with the supported speeds. If speeds buffer is too small to contain |
| 189 | * all currently supported speeds, will return as many speeds as can fit. |
| 190 | */ |
| 191 | unsigned int phy_supported_speeds(struct phy_device *phy, |
| 192 | unsigned int *speeds, |
| 193 | unsigned int size) |
| 194 | { |
| 195 | unsigned long supported = phy->supported; |
| 196 | |
| 197 | return phy_speeds(speeds, size, &supported, BITS_PER_LONG); |
| 198 | } |
| 199 | |
| 200 | /** |
| 201 | * phy_check_valid - check if there is a valid PHY setting which matches |
| 202 | * speed, duplex, and feature mask |
| 203 | * @speed: speed to match |
| 204 | * @duplex: duplex to match |
| 205 | * @features: A mask of the valid settings |
| 206 | * |
| 207 | * Description: Returns true if there is a valid setting, false otherwise. |
| 208 | */ |
| 209 | static inline bool phy_check_valid(int speed, int duplex, u32 features) |
| 210 | { |
| 211 | unsigned long mask = features; |
| 212 | |
| 213 | return !!phy_lookup_setting(speed, duplex, &mask, BITS_PER_LONG, true); |
| 214 | } |
| 215 | |
| 216 | /** |
| 217 | * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex |
| 218 | * @phydev: the target phy_device struct |
| 219 | * |
| 220 | * Description: Make sure the PHY is set to supported speeds and |
| 221 | * duplexes. Drop down by one in this order: 1000/FULL, |
| 222 | * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF. |
| 223 | */ |
| 224 | static void phy_sanitize_settings(struct phy_device *phydev) |
| 225 | { |
| 226 | const struct phy_setting *setting; |
| 227 | u32 features = phydev->supported; |
| 228 | |
| 229 | /* Sanitize settings based on PHY capabilities */ |
| 230 | if ((features & SUPPORTED_Autoneg) == 0) |
| 231 | phydev->autoneg = AUTONEG_DISABLE; |
| 232 | |
| 233 | setting = phy_find_valid(phydev->speed, phydev->duplex, features); |
| 234 | if (setting) { |
| 235 | phydev->speed = setting->speed; |
| 236 | phydev->duplex = setting->duplex; |
| 237 | } else { |
| 238 | /* We failed to find anything (no supported speeds?) */ |
| 239 | phydev->speed = SPEED_UNKNOWN; |
| 240 | phydev->duplex = DUPLEX_UNKNOWN; |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * phy_ethtool_sset - generic ethtool sset function, handles all the details |
| 246 | * @phydev: target phy_device struct |
| 247 | * @cmd: ethtool_cmd |
| 248 | * |
| 249 | * A few notes about parameter checking: |
| 250 | * |
| 251 | * - We don't set port or transceiver, so we don't care what they |
| 252 | * were set to. |
| 253 | * - phy_start_aneg() will make sure forced settings are sane, and |
| 254 | * choose the next best ones from the ones selected, so we don't |
| 255 | * care if ethtool tries to give us bad values. |
| 256 | */ |
| 257 | int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd) |
| 258 | { |
| 259 | u32 speed = ethtool_cmd_speed(cmd); |
| 260 | |
| 261 | if (cmd->phy_address != phydev->mdio.addr) |
| 262 | return -EINVAL; |
| 263 | |
| 264 | /* We make sure that we don't pass unsupported values in to the PHY */ |
| 265 | cmd->advertising &= phydev->supported; |
| 266 | |
| 267 | /* Verify the settings we care about. */ |
| 268 | if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE) |
| 269 | return -EINVAL; |
| 270 | |
| 271 | if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0) |
| 272 | return -EINVAL; |
| 273 | |
| 274 | if (cmd->autoneg == AUTONEG_DISABLE && |
| 275 | ((speed != SPEED_1000 && |
| 276 | speed != SPEED_100 && |
| 277 | speed != SPEED_10) || |
| 278 | (cmd->duplex != DUPLEX_HALF && |
| 279 | cmd->duplex != DUPLEX_FULL))) |
| 280 | return -EINVAL; |
| 281 | |
| 282 | phydev->autoneg = cmd->autoneg; |
| 283 | |
| 284 | phydev->speed = speed; |
| 285 | |
| 286 | phydev->advertising = cmd->advertising; |
| 287 | |
| 288 | if (AUTONEG_ENABLE == cmd->autoneg) |
| 289 | phydev->advertising |= ADVERTISED_Autoneg; |
| 290 | else |
| 291 | phydev->advertising &= ~ADVERTISED_Autoneg; |
| 292 | |
| 293 | phydev->duplex = cmd->duplex; |
| 294 | |
| 295 | phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl; |
| 296 | |
| 297 | /* Restart the PHY */ |
| 298 | phy_start_aneg(phydev); |
| 299 | |
| 300 | return 0; |
| 301 | } |
| 302 | EXPORT_SYMBOL(phy_ethtool_sset); |
| 303 | |
| 304 | int phy_ethtool_ksettings_set(struct phy_device *phydev, |
| 305 | const struct ethtool_link_ksettings *cmd) |
| 306 | { |
| 307 | u8 autoneg = cmd->base.autoneg; |
| 308 | u8 duplex = cmd->base.duplex; |
| 309 | u32 speed = cmd->base.speed; |
| 310 | u32 advertising; |
| 311 | |
| 312 | if (cmd->base.phy_address != phydev->mdio.addr) |
| 313 | return -EINVAL; |
| 314 | |
| 315 | ethtool_convert_link_mode_to_legacy_u32(&advertising, |
| 316 | cmd->link_modes.advertising); |
| 317 | |
| 318 | /* We make sure that we don't pass unsupported values in to the PHY */ |
| 319 | advertising &= phydev->supported; |
| 320 | |
| 321 | /* Verify the settings we care about. */ |
| 322 | if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE) |
| 323 | return -EINVAL; |
| 324 | |
| 325 | if (autoneg == AUTONEG_ENABLE && advertising == 0) |
| 326 | return -EINVAL; |
| 327 | |
| 328 | if (autoneg == AUTONEG_DISABLE && |
| 329 | ((speed != SPEED_1000 && |
| 330 | speed != SPEED_100 && |
| 331 | speed != SPEED_10) || |
| 332 | (duplex != DUPLEX_HALF && |
| 333 | duplex != DUPLEX_FULL))) |
| 334 | return -EINVAL; |
| 335 | |
| 336 | phydev->autoneg = autoneg; |
| 337 | |
| 338 | phydev->speed = speed; |
| 339 | |
| 340 | phydev->advertising = advertising; |
| 341 | |
| 342 | if (autoneg == AUTONEG_ENABLE) |
| 343 | phydev->advertising |= ADVERTISED_Autoneg; |
| 344 | else |
| 345 | phydev->advertising &= ~ADVERTISED_Autoneg; |
| 346 | |
| 347 | phydev->duplex = duplex; |
| 348 | |
| 349 | phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl; |
| 350 | |
| 351 | /* Restart the PHY */ |
| 352 | phy_start_aneg(phydev); |
| 353 | |
| 354 | return 0; |
| 355 | } |
| 356 | EXPORT_SYMBOL(phy_ethtool_ksettings_set); |
| 357 | |
| 358 | void phy_ethtool_ksettings_get(struct phy_device *phydev, |
| 359 | struct ethtool_link_ksettings *cmd) |
| 360 | { |
| 361 | ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, |
| 362 | phydev->supported); |
| 363 | |
| 364 | ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, |
| 365 | phydev->advertising); |
| 366 | |
| 367 | ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising, |
| 368 | phydev->lp_advertising); |
| 369 | |
| 370 | cmd->base.speed = phydev->speed; |
| 371 | cmd->base.duplex = phydev->duplex; |
| 372 | if (phydev->interface == PHY_INTERFACE_MODE_MOCA) |
| 373 | cmd->base.port = PORT_BNC; |
| 374 | else |
| 375 | cmd->base.port = PORT_MII; |
| 376 | cmd->base.transceiver = phy_is_internal(phydev) ? |
| 377 | XCVR_INTERNAL : XCVR_EXTERNAL; |
| 378 | cmd->base.phy_address = phydev->mdio.addr; |
| 379 | cmd->base.autoneg = phydev->autoneg; |
| 380 | cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl; |
| 381 | cmd->base.eth_tp_mdix = phydev->mdix; |
| 382 | } |
| 383 | EXPORT_SYMBOL(phy_ethtool_ksettings_get); |
| 384 | |
| 385 | /** |
| 386 | * phy_mii_ioctl - generic PHY MII ioctl interface |
| 387 | * @phydev: the phy_device struct |
| 388 | * @ifr: &struct ifreq for socket ioctl's |
| 389 | * @cmd: ioctl cmd to execute |
| 390 | * |
| 391 | * Note that this function is currently incompatible with the |
| 392 | * PHYCONTROL layer. It changes registers without regard to |
| 393 | * current state. Use at own risk. |
| 394 | */ |
| 395 | int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd) |
| 396 | { |
| 397 | struct mii_ioctl_data *mii_data = if_mii(ifr); |
| 398 | u16 val = mii_data->val_in; |
| 399 | bool change_autoneg = false; |
| 400 | |
| 401 | switch (cmd) { |
| 402 | case SIOCGMIIPHY: |
| 403 | mii_data->phy_id = phydev->mdio.addr; |
| 404 | /* fall through */ |
| 405 | |
| 406 | case SIOCGMIIREG: |
| 407 | mii_data->val_out = mdiobus_read(phydev->mdio.bus, |
| 408 | mii_data->phy_id, |
| 409 | mii_data->reg_num); |
| 410 | return 0; |
| 411 | |
| 412 | case SIOCSMIIREG: |
| 413 | if (mii_data->phy_id == phydev->mdio.addr) { |
| 414 | switch (mii_data->reg_num) { |
| 415 | case MII_BMCR: |
| 416 | if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) { |
| 417 | if (phydev->autoneg == AUTONEG_ENABLE) |
| 418 | change_autoneg = true; |
| 419 | phydev->autoneg = AUTONEG_DISABLE; |
| 420 | if (val & BMCR_FULLDPLX) |
| 421 | phydev->duplex = DUPLEX_FULL; |
| 422 | else |
| 423 | phydev->duplex = DUPLEX_HALF; |
| 424 | if (val & BMCR_SPEED1000) |
| 425 | phydev->speed = SPEED_1000; |
| 426 | else if (val & BMCR_SPEED100) |
| 427 | phydev->speed = SPEED_100; |
| 428 | else phydev->speed = SPEED_10; |
| 429 | } |
| 430 | else { |
| 431 | if (phydev->autoneg == AUTONEG_DISABLE) |
| 432 | change_autoneg = true; |
| 433 | phydev->autoneg = AUTONEG_ENABLE; |
| 434 | } |
| 435 | break; |
| 436 | case MII_ADVERTISE: |
| 437 | phydev->advertising = mii_adv_to_ethtool_adv_t(val); |
| 438 | change_autoneg = true; |
| 439 | break; |
| 440 | default: |
| 441 | /* do nothing */ |
| 442 | break; |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | mdiobus_write(phydev->mdio.bus, mii_data->phy_id, |
| 447 | mii_data->reg_num, val); |
| 448 | |
| 449 | if (mii_data->phy_id == phydev->mdio.addr && |
| 450 | mii_data->reg_num == MII_BMCR && |
| 451 | val & BMCR_RESET) |
| 452 | return phy_init_hw(phydev); |
| 453 | |
| 454 | if (change_autoneg) |
| 455 | return phy_start_aneg(phydev); |
| 456 | |
| 457 | return 0; |
| 458 | |
| 459 | case SIOCSHWTSTAMP: |
| 460 | if (phydev->drv && phydev->drv->hwtstamp) |
| 461 | return phydev->drv->hwtstamp(phydev, ifr); |
| 462 | /* fall through */ |
| 463 | |
| 464 | default: |
| 465 | return -EOPNOTSUPP; |
| 466 | } |
| 467 | } |
| 468 | EXPORT_SYMBOL(phy_mii_ioctl); |
| 469 | |
| 470 | /** |
| 471 | * phy_start_aneg_priv - start auto-negotiation for this PHY device |
| 472 | * @phydev: the phy_device struct |
| 473 | * @sync: indicate whether we should wait for the workqueue cancelation |
| 474 | * |
| 475 | * Description: Sanitizes the settings (if we're not autonegotiating |
| 476 | * them), and then calls the driver's config_aneg function. |
| 477 | * If the PHYCONTROL Layer is operating, we change the state to |
| 478 | * reflect the beginning of Auto-negotiation or forcing. |
| 479 | */ |
| 480 | static int phy_start_aneg_priv(struct phy_device *phydev, bool sync) |
| 481 | { |
| 482 | bool trigger = 0; |
| 483 | int err; |
| 484 | |
| 485 | if (!phydev->drv) |
| 486 | return -EIO; |
| 487 | |
| 488 | mutex_lock(&phydev->lock); |
| 489 | |
| 490 | if (AUTONEG_DISABLE == phydev->autoneg) |
| 491 | phy_sanitize_settings(phydev); |
| 492 | |
| 493 | /* Invalidate LP advertising flags */ |
| 494 | phydev->lp_advertising = 0; |
| 495 | |
| 496 | err = phydev->drv->config_aneg(phydev); |
| 497 | if (err < 0) |
| 498 | goto out_unlock; |
| 499 | |
| 500 | if (phydev->state != PHY_HALTED) { |
| 501 | if (AUTONEG_ENABLE == phydev->autoneg) { |
| 502 | phydev->state = PHY_AN; |
| 503 | phydev->link_timeout = PHY_AN_TIMEOUT; |
| 504 | } else { |
| 505 | phydev->state = PHY_FORCING; |
| 506 | phydev->link_timeout = PHY_FORCE_TIMEOUT; |
| 507 | } |
| 508 | } |
| 509 | |
| 510 | /* Re-schedule a PHY state machine to check PHY status because |
| 511 | * negotiation may already be done and aneg interrupt may not be |
| 512 | * generated. |
| 513 | */ |
| 514 | if (phydev->irq != PHY_POLL && phydev->state == PHY_AN) { |
| 515 | err = phy_aneg_done(phydev); |
| 516 | if (err > 0) { |
| 517 | trigger = true; |
| 518 | err = 0; |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | out_unlock: |
| 523 | mutex_unlock(&phydev->lock); |
| 524 | |
| 525 | if (trigger) |
| 526 | phy_trigger_machine(phydev, sync); |
| 527 | |
| 528 | return err; |
| 529 | } |
| 530 | |
| 531 | /** |
| 532 | * phy_start_aneg - start auto-negotiation for this PHY device |
| 533 | * @phydev: the phy_device struct |
| 534 | * |
| 535 | * Description: Sanitizes the settings (if we're not autonegotiating |
| 536 | * them), and then calls the driver's config_aneg function. |
| 537 | * If the PHYCONTROL Layer is operating, we change the state to |
| 538 | * reflect the beginning of Auto-negotiation or forcing. |
| 539 | */ |
| 540 | int phy_start_aneg(struct phy_device *phydev) |
| 541 | { |
| 542 | return phy_start_aneg_priv(phydev, true); |
| 543 | } |
| 544 | EXPORT_SYMBOL(phy_start_aneg); |
| 545 | |
| 546 | /** |
| 547 | * phy_start_machine - start PHY state machine tracking |
| 548 | * @phydev: the phy_device struct |
| 549 | * |
| 550 | * Description: The PHY infrastructure can run a state machine |
| 551 | * which tracks whether the PHY is starting up, negotiating, |
| 552 | * etc. This function starts the delayed workqueue which tracks |
| 553 | * the state of the PHY. If you want to maintain your own state machine, |
| 554 | * do not call this function. |
| 555 | */ |
| 556 | void phy_start_machine(struct phy_device *phydev) |
| 557 | { |
| 558 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ); |
| 559 | } |
| 560 | EXPORT_SYMBOL_GPL(phy_start_machine); |
| 561 | |
| 562 | /** |
| 563 | * phy_trigger_machine - trigger the state machine to run |
| 564 | * |
| 565 | * @phydev: the phy_device struct |
| 566 | * @sync: indicate whether we should wait for the workqueue cancelation |
| 567 | * |
| 568 | * Description: There has been a change in state which requires that the |
| 569 | * state machine runs. |
| 570 | */ |
| 571 | |
| 572 | void phy_trigger_machine(struct phy_device *phydev, bool sync) |
| 573 | { |
| 574 | if (sync) |
| 575 | cancel_delayed_work_sync(&phydev->state_queue); |
| 576 | else |
| 577 | cancel_delayed_work(&phydev->state_queue); |
| 578 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0); |
| 579 | } |
| 580 | |
| 581 | /** |
| 582 | * phy_stop_machine - stop the PHY state machine tracking |
| 583 | * @phydev: target phy_device struct |
| 584 | * |
| 585 | * Description: Stops the state machine delayed workqueue, sets the |
| 586 | * state to UP (unless it wasn't up yet). This function must be |
| 587 | * called BEFORE phy_detach. |
| 588 | */ |
| 589 | void phy_stop_machine(struct phy_device *phydev) |
| 590 | { |
| 591 | cancel_delayed_work_sync(&phydev->state_queue); |
| 592 | |
| 593 | mutex_lock(&phydev->lock); |
| 594 | if (phydev->state > PHY_UP && phydev->state != PHY_HALTED) |
| 595 | phydev->state = PHY_UP; |
| 596 | mutex_unlock(&phydev->lock); |
| 597 | } |
| 598 | |
| 599 | /** |
| 600 | * phy_error - enter HALTED state for this PHY device |
| 601 | * @phydev: target phy_device struct |
| 602 | * |
| 603 | * Moves the PHY to the HALTED state in response to a read |
| 604 | * or write error, and tells the controller the link is down. |
| 605 | * Must not be called from interrupt context, or while the |
| 606 | * phydev->lock is held. |
| 607 | */ |
| 608 | static void phy_error(struct phy_device *phydev) |
| 609 | { |
| 610 | mutex_lock(&phydev->lock); |
| 611 | phydev->state = PHY_HALTED; |
| 612 | mutex_unlock(&phydev->lock); |
| 613 | |
| 614 | phy_trigger_machine(phydev, false); |
| 615 | } |
| 616 | |
| 617 | /** |
| 618 | * phy_disable_interrupts - Disable the PHY interrupts from the PHY side |
| 619 | * @phydev: target phy_device struct |
| 620 | */ |
| 621 | static int phy_disable_interrupts(struct phy_device *phydev) |
| 622 | { |
| 623 | int err; |
| 624 | |
| 625 | /* Disable PHY interrupts */ |
| 626 | err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); |
| 627 | if (err) |
| 628 | goto phy_err; |
| 629 | |
| 630 | /* Clear the interrupt */ |
| 631 | err = phy_clear_interrupt(phydev); |
| 632 | if (err) |
| 633 | goto phy_err; |
| 634 | |
| 635 | return 0; |
| 636 | |
| 637 | phy_err: |
| 638 | phy_error(phydev); |
| 639 | |
| 640 | return err; |
| 641 | } |
| 642 | |
| 643 | /** |
| 644 | * phy_change - Called by the phy_interrupt to handle PHY changes |
| 645 | * @phydev: phy_device struct that interrupted |
| 646 | */ |
| 647 | static irqreturn_t phy_change(struct phy_device *phydev) |
| 648 | { |
| 649 | if (phy_interrupt_is_valid(phydev)) { |
| 650 | if (phydev->drv->did_interrupt && |
| 651 | !phydev->drv->did_interrupt(phydev)) |
| 652 | goto ignore; |
| 653 | |
| 654 | if (phy_disable_interrupts(phydev)) |
| 655 | goto phy_err; |
| 656 | } |
| 657 | |
| 658 | mutex_lock(&phydev->lock); |
| 659 | if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state)) |
| 660 | phydev->state = PHY_CHANGELINK; |
| 661 | mutex_unlock(&phydev->lock); |
| 662 | |
| 663 | if (phy_interrupt_is_valid(phydev)) { |
| 664 | atomic_dec(&phydev->irq_disable); |
| 665 | enable_irq(phydev->irq); |
| 666 | |
| 667 | /* Reenable interrupts */ |
| 668 | if (PHY_HALTED != phydev->state && |
| 669 | phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED)) |
| 670 | goto irq_enable_err; |
| 671 | } |
| 672 | |
| 673 | /* reschedule state queue work to run as soon as possible */ |
| 674 | phy_trigger_machine(phydev, true); |
| 675 | return IRQ_HANDLED; |
| 676 | |
| 677 | ignore: |
| 678 | atomic_dec(&phydev->irq_disable); |
| 679 | enable_irq(phydev->irq); |
| 680 | return IRQ_NONE; |
| 681 | |
| 682 | irq_enable_err: |
| 683 | disable_irq(phydev->irq); |
| 684 | atomic_inc(&phydev->irq_disable); |
| 685 | phy_err: |
| 686 | phy_error(phydev); |
| 687 | return IRQ_NONE; |
| 688 | } |
| 689 | |
| 690 | /** |
| 691 | * phy_change_work - Scheduled by the phy_mac_interrupt to handle PHY changes |
| 692 | * @work: work_struct that describes the work to be done |
| 693 | */ |
| 694 | void phy_change_work(struct work_struct *work) |
| 695 | { |
| 696 | struct phy_device *phydev = |
| 697 | container_of(work, struct phy_device, phy_queue); |
| 698 | |
| 699 | phy_change(phydev); |
| 700 | } |
| 701 | |
| 702 | /** |
| 703 | * phy_interrupt - PHY interrupt handler |
| 704 | * @irq: interrupt line |
| 705 | * @phy_dat: phy_device pointer |
| 706 | * |
| 707 | * Description: When a PHY interrupt occurs, the handler disables |
| 708 | * interrupts, and uses phy_change to handle the interrupt. |
| 709 | */ |
| 710 | static irqreturn_t phy_interrupt(int irq, void *phy_dat) |
| 711 | { |
| 712 | struct phy_device *phydev = phy_dat; |
| 713 | |
| 714 | if (PHY_HALTED == phydev->state) |
| 715 | return IRQ_NONE; /* It can't be ours. */ |
| 716 | |
| 717 | disable_irq_nosync(irq); |
| 718 | atomic_inc(&phydev->irq_disable); |
| 719 | |
| 720 | return phy_change(phydev); |
| 721 | } |
| 722 | |
| 723 | /** |
| 724 | * phy_enable_interrupts - Enable the interrupts from the PHY side |
| 725 | * @phydev: target phy_device struct |
| 726 | */ |
| 727 | static int phy_enable_interrupts(struct phy_device *phydev) |
| 728 | { |
| 729 | int err = phy_clear_interrupt(phydev); |
| 730 | |
| 731 | if (err < 0) |
| 732 | return err; |
| 733 | |
| 734 | return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); |
| 735 | } |
| 736 | |
| 737 | /** |
| 738 | * phy_start_interrupts - request and enable interrupts for a PHY device |
| 739 | * @phydev: target phy_device struct |
| 740 | * |
| 741 | * Description: Request the interrupt for the given PHY. |
| 742 | * If this fails, then we set irq to PHY_POLL. |
| 743 | * Otherwise, we enable the interrupts in the PHY. |
| 744 | * This should only be called with a valid IRQ number. |
| 745 | * Returns 0 on success or < 0 on error. |
| 746 | */ |
| 747 | int phy_start_interrupts(struct phy_device *phydev) |
| 748 | { |
| 749 | atomic_set(&phydev->irq_disable, 0); |
| 750 | if (request_threaded_irq(phydev->irq, NULL, phy_interrupt, |
| 751 | IRQF_ONESHOT | IRQF_SHARED, |
| 752 | phydev_name(phydev), phydev) < 0) { |
| 753 | pr_warn("%s: Can't get IRQ %d (PHY)\n", |
| 754 | phydev->mdio.bus->name, phydev->irq); |
| 755 | phydev->irq = PHY_POLL; |
| 756 | return 0; |
| 757 | } |
| 758 | |
| 759 | return phy_enable_interrupts(phydev); |
| 760 | } |
| 761 | EXPORT_SYMBOL(phy_start_interrupts); |
| 762 | |
| 763 | /** |
| 764 | * phy_stop_interrupts - disable interrupts from a PHY device |
| 765 | * @phydev: target phy_device struct |
| 766 | */ |
| 767 | int phy_stop_interrupts(struct phy_device *phydev) |
| 768 | { |
| 769 | int err = phy_disable_interrupts(phydev); |
| 770 | |
| 771 | if (err) |
| 772 | phy_error(phydev); |
| 773 | |
| 774 | free_irq(phydev->irq, phydev); |
| 775 | |
| 776 | /* If work indeed has been cancelled, disable_irq() will have |
| 777 | * been left unbalanced from phy_interrupt() and enable_irq() |
| 778 | * has to be called so that other devices on the line work. |
| 779 | */ |
| 780 | while (atomic_dec_return(&phydev->irq_disable) >= 0) |
| 781 | enable_irq(phydev->irq); |
| 782 | |
| 783 | return err; |
| 784 | } |
| 785 | EXPORT_SYMBOL(phy_stop_interrupts); |
| 786 | |
| 787 | /** |
| 788 | * phy_stop - Bring down the PHY link, and stop checking the status |
| 789 | * @phydev: target phy_device struct |
| 790 | */ |
| 791 | void phy_stop(struct phy_device *phydev) |
| 792 | { |
| 793 | mutex_lock(&phydev->lock); |
| 794 | |
| 795 | if (PHY_HALTED == phydev->state) |
| 796 | goto out_unlock; |
| 797 | |
| 798 | if (phy_interrupt_is_valid(phydev)) { |
| 799 | /* Disable PHY Interrupts */ |
| 800 | phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); |
| 801 | |
| 802 | /* Clear any pending interrupts */ |
| 803 | phy_clear_interrupt(phydev); |
| 804 | } |
| 805 | |
| 806 | phydev->state = PHY_HALTED; |
| 807 | |
| 808 | out_unlock: |
| 809 | mutex_unlock(&phydev->lock); |
| 810 | |
| 811 | /* Cannot call flush_scheduled_work() here as desired because |
| 812 | * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change() |
| 813 | * will not reenable interrupts. |
| 814 | */ |
| 815 | } |
| 816 | EXPORT_SYMBOL(phy_stop); |
| 817 | |
| 818 | /** |
| 819 | * phy_start - start or restart a PHY device |
| 820 | * @phydev: target phy_device struct |
| 821 | * |
| 822 | * Description: Indicates the attached device's readiness to |
| 823 | * handle PHY-related work. Used during startup to start the |
| 824 | * PHY, and after a call to phy_stop() to resume operation. |
| 825 | * Also used to indicate the MDIO bus has cleared an error |
| 826 | * condition. |
| 827 | */ |
| 828 | void phy_start(struct phy_device *phydev) |
| 829 | { |
| 830 | int err = 0; |
| 831 | |
| 832 | mutex_lock(&phydev->lock); |
| 833 | |
| 834 | switch (phydev->state) { |
| 835 | case PHY_STARTING: |
| 836 | phydev->state = PHY_PENDING; |
| 837 | break; |
| 838 | case PHY_READY: |
| 839 | phydev->state = PHY_UP; |
| 840 | break; |
| 841 | case PHY_HALTED: |
| 842 | /* if phy was suspended, bring the physical link up again */ |
| 843 | __phy_resume(phydev); |
| 844 | |
| 845 | /* make sure interrupts are re-enabled for the PHY */ |
| 846 | if (phy_interrupt_is_valid(phydev)) { |
| 847 | err = phy_enable_interrupts(phydev); |
| 848 | if (err < 0) |
| 849 | break; |
| 850 | } |
| 851 | |
| 852 | phydev->state = PHY_RESUMING; |
| 853 | break; |
| 854 | default: |
| 855 | break; |
| 856 | } |
| 857 | mutex_unlock(&phydev->lock); |
| 858 | |
| 859 | phy_trigger_machine(phydev, true); |
| 860 | } |
| 861 | EXPORT_SYMBOL(phy_start); |
| 862 | |
| 863 | static void phy_link_up(struct phy_device *phydev) |
| 864 | { |
| 865 | phydev->phy_link_change(phydev, true, true); |
| 866 | phy_led_trigger_change_speed(phydev); |
| 867 | } |
| 868 | |
| 869 | static void phy_link_down(struct phy_device *phydev, bool do_carrier) |
| 870 | { |
| 871 | phydev->phy_link_change(phydev, false, do_carrier); |
| 872 | phy_led_trigger_change_speed(phydev); |
| 873 | } |
| 874 | |
| 875 | /** |
| 876 | * phy_state_machine - Handle the state machine |
| 877 | * @work: work_struct that describes the work to be done |
| 878 | */ |
| 879 | void phy_state_machine(struct work_struct *work) |
| 880 | { |
| 881 | struct delayed_work *dwork = to_delayed_work(work); |
| 882 | struct phy_device *phydev = |
| 883 | container_of(dwork, struct phy_device, state_queue); |
| 884 | bool needs_aneg = false, do_suspend = false; |
| 885 | enum phy_state old_state; |
| 886 | int err = 0; |
| 887 | int old_link; |
| 888 | |
| 889 | mutex_lock(&phydev->lock); |
| 890 | |
| 891 | old_state = phydev->state; |
| 892 | |
| 893 | if (phydev->drv && phydev->drv->link_change_notify) |
| 894 | phydev->drv->link_change_notify(phydev); |
| 895 | |
| 896 | switch (phydev->state) { |
| 897 | case PHY_DOWN: |
| 898 | case PHY_STARTING: |
| 899 | case PHY_READY: |
| 900 | case PHY_PENDING: |
| 901 | break; |
| 902 | case PHY_UP: |
| 903 | needs_aneg = true; |
| 904 | |
| 905 | phydev->link_timeout = PHY_AN_TIMEOUT; |
| 906 | |
| 907 | break; |
| 908 | case PHY_AN: |
| 909 | err = phy_read_status(phydev); |
| 910 | if (err < 0) |
| 911 | break; |
| 912 | |
| 913 | /* If the link is down, give up on negotiation for now */ |
| 914 | if (!phydev->link) { |
| 915 | phydev->state = PHY_NOLINK; |
| 916 | phy_link_down(phydev, true); |
| 917 | break; |
| 918 | } |
| 919 | |
| 920 | /* Check if negotiation is done. Break if there's an error */ |
| 921 | err = phy_aneg_done(phydev); |
| 922 | if (err < 0) |
| 923 | break; |
| 924 | |
| 925 | /* If AN is done, we're running */ |
| 926 | if (err > 0) { |
| 927 | phydev->state = PHY_RUNNING; |
| 928 | phy_link_up(phydev); |
| 929 | } else if (0 == phydev->link_timeout--) |
| 930 | needs_aneg = true; |
| 931 | break; |
| 932 | case PHY_NOLINK: |
| 933 | if (phy_interrupt_is_valid(phydev)) |
| 934 | break; |
| 935 | |
| 936 | err = phy_read_status(phydev); |
| 937 | if (err) |
| 938 | break; |
| 939 | |
| 940 | if (phydev->link) { |
| 941 | if (AUTONEG_ENABLE == phydev->autoneg) { |
| 942 | err = phy_aneg_done(phydev); |
| 943 | if (err < 0) |
| 944 | break; |
| 945 | |
| 946 | if (!err) { |
| 947 | phydev->state = PHY_AN; |
| 948 | phydev->link_timeout = PHY_AN_TIMEOUT; |
| 949 | break; |
| 950 | } |
| 951 | } |
| 952 | phydev->state = PHY_RUNNING; |
| 953 | phy_link_up(phydev); |
| 954 | } |
| 955 | break; |
| 956 | case PHY_FORCING: |
| 957 | err = genphy_update_link(phydev); |
| 958 | if (err) |
| 959 | break; |
| 960 | |
| 961 | if (phydev->link) { |
| 962 | phydev->state = PHY_RUNNING; |
| 963 | phy_link_up(phydev); |
| 964 | } else { |
| 965 | if (0 == phydev->link_timeout--) |
| 966 | needs_aneg = true; |
| 967 | phy_link_down(phydev, false); |
| 968 | } |
| 969 | break; |
| 970 | case PHY_RUNNING: |
| 971 | /* Only register a CHANGE if we are polling and link changed |
| 972 | * since latest checking. |
| 973 | */ |
| 974 | if (phydev->irq == PHY_POLL) { |
| 975 | old_link = phydev->link; |
| 976 | err = phy_read_status(phydev); |
| 977 | if (err) |
| 978 | break; |
| 979 | |
| 980 | if (old_link != phydev->link) |
| 981 | phydev->state = PHY_CHANGELINK; |
| 982 | } |
| 983 | /* |
| 984 | * Failsafe: check that nobody set phydev->link=0 between two |
| 985 | * poll cycles, otherwise we won't leave RUNNING state as long |
| 986 | * as link remains down. |
| 987 | */ |
| 988 | if (!phydev->link && phydev->state == PHY_RUNNING) { |
| 989 | phydev->state = PHY_CHANGELINK; |
| 990 | phydev_err(phydev, "no link in PHY_RUNNING\n"); |
| 991 | } |
| 992 | break; |
| 993 | case PHY_CHANGELINK: |
| 994 | err = phy_read_status(phydev); |
| 995 | if (err) |
| 996 | break; |
| 997 | |
| 998 | if (phydev->link) { |
| 999 | phydev->state = PHY_RUNNING; |
| 1000 | phy_link_up(phydev); |
| 1001 | } else { |
| 1002 | phydev->state = PHY_NOLINK; |
| 1003 | phy_link_down(phydev, true); |
| 1004 | } |
| 1005 | |
| 1006 | if (phy_interrupt_is_valid(phydev)) |
| 1007 | err = phy_config_interrupt(phydev, |
| 1008 | PHY_INTERRUPT_ENABLED); |
| 1009 | break; |
| 1010 | case PHY_HALTED: |
| 1011 | if (phydev->link) { |
| 1012 | phydev->link = 0; |
| 1013 | phy_link_down(phydev, true); |
| 1014 | do_suspend = true; |
| 1015 | } |
| 1016 | break; |
| 1017 | case PHY_RESUMING: |
| 1018 | if (AUTONEG_ENABLE == phydev->autoneg) { |
| 1019 | err = phy_aneg_done(phydev); |
| 1020 | if (err < 0) |
| 1021 | break; |
| 1022 | |
| 1023 | /* err > 0 if AN is done. |
| 1024 | * Otherwise, it's 0, and we're still waiting for AN |
| 1025 | */ |
| 1026 | if (err > 0) { |
| 1027 | err = phy_read_status(phydev); |
| 1028 | if (err) |
| 1029 | break; |
| 1030 | |
| 1031 | if (phydev->link) { |
| 1032 | phydev->state = PHY_RUNNING; |
| 1033 | phy_link_up(phydev); |
| 1034 | } else { |
| 1035 | phydev->state = PHY_NOLINK; |
| 1036 | phy_link_down(phydev, false); |
| 1037 | } |
| 1038 | } else { |
| 1039 | phydev->state = PHY_AN; |
| 1040 | phydev->link_timeout = PHY_AN_TIMEOUT; |
| 1041 | } |
| 1042 | } else { |
| 1043 | err = phy_read_status(phydev); |
| 1044 | if (err) |
| 1045 | break; |
| 1046 | |
| 1047 | if (phydev->link) { |
| 1048 | phydev->state = PHY_RUNNING; |
| 1049 | phy_link_up(phydev); |
| 1050 | } else { |
| 1051 | phydev->state = PHY_NOLINK; |
| 1052 | phy_link_down(phydev, false); |
| 1053 | } |
| 1054 | } |
| 1055 | break; |
| 1056 | } |
| 1057 | |
| 1058 | mutex_unlock(&phydev->lock); |
| 1059 | |
| 1060 | if (needs_aneg) |
| 1061 | err = phy_start_aneg_priv(phydev, false); |
| 1062 | else if (do_suspend) |
| 1063 | phy_suspend(phydev); |
| 1064 | |
| 1065 | if (err < 0) |
| 1066 | phy_error(phydev); |
| 1067 | |
| 1068 | if (old_state != phydev->state) |
| 1069 | phydev_dbg(phydev, "PHY state change %s -> %s\n", |
| 1070 | phy_state_to_str(old_state), |
| 1071 | phy_state_to_str(phydev->state)); |
| 1072 | |
| 1073 | /* Only re-schedule a PHY state machine change if we are polling the |
| 1074 | * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving |
| 1075 | * between states from phy_mac_interrupt() |
| 1076 | */ |
| 1077 | if (phydev->irq == PHY_POLL) |
| 1078 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, |
| 1079 | PHY_STATE_TIME * HZ); |
| 1080 | } |
| 1081 | |
| 1082 | /** |
| 1083 | * phy_mac_interrupt - MAC says the link has changed |
| 1084 | * @phydev: phy_device struct with changed link |
| 1085 | * @new_link: Link is Up/Down. |
| 1086 | * |
| 1087 | * Description: The MAC layer is able indicate there has been a change |
| 1088 | * in the PHY link status. Set the new link status, and trigger the |
| 1089 | * state machine, work a work queue. |
| 1090 | */ |
| 1091 | void phy_mac_interrupt(struct phy_device *phydev, int new_link) |
| 1092 | { |
| 1093 | phydev->link = new_link; |
| 1094 | |
| 1095 | /* Trigger a state machine change */ |
| 1096 | queue_work(system_power_efficient_wq, &phydev->phy_queue); |
| 1097 | } |
| 1098 | EXPORT_SYMBOL(phy_mac_interrupt); |
| 1099 | |
| 1100 | /** |
| 1101 | * phy_init_eee - init and check the EEE feature |
| 1102 | * @phydev: target phy_device struct |
| 1103 | * @clk_stop_enable: PHY may stop the clock during LPI |
| 1104 | * |
| 1105 | * Description: it checks if the Energy-Efficient Ethernet (EEE) |
| 1106 | * is supported by looking at the MMD registers 3.20 and 7.60/61 |
| 1107 | * and it programs the MMD register 3.0 setting the "Clock stop enable" |
| 1108 | * bit if required. |
| 1109 | */ |
| 1110 | int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable) |
| 1111 | { |
| 1112 | if (!phydev->drv) |
| 1113 | return -EIO; |
| 1114 | |
| 1115 | /* According to 802.3az,the EEE is supported only in full duplex-mode. |
| 1116 | */ |
| 1117 | if (phydev->duplex == DUPLEX_FULL) { |
| 1118 | int eee_lp, eee_cap, eee_adv; |
| 1119 | u32 lp, cap, adv; |
| 1120 | int status; |
| 1121 | |
| 1122 | /* Read phy status to properly get the right settings */ |
| 1123 | status = phy_read_status(phydev); |
| 1124 | if (status) |
| 1125 | return status; |
| 1126 | |
| 1127 | /* First check if the EEE ability is supported */ |
| 1128 | eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); |
| 1129 | if (eee_cap <= 0) |
| 1130 | goto eee_exit_err; |
| 1131 | |
| 1132 | cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap); |
| 1133 | if (!cap) |
| 1134 | goto eee_exit_err; |
| 1135 | |
| 1136 | /* Check which link settings negotiated and verify it in |
| 1137 | * the EEE advertising registers. |
| 1138 | */ |
| 1139 | eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE); |
| 1140 | if (eee_lp <= 0) |
| 1141 | goto eee_exit_err; |
| 1142 | |
| 1143 | eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); |
| 1144 | if (eee_adv <= 0) |
| 1145 | goto eee_exit_err; |
| 1146 | |
| 1147 | adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv); |
| 1148 | lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp); |
| 1149 | if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv)) |
| 1150 | goto eee_exit_err; |
| 1151 | |
| 1152 | if (clk_stop_enable) { |
| 1153 | /* Configure the PHY to stop receiving xMII |
| 1154 | * clock while it is signaling LPI. |
| 1155 | */ |
| 1156 | int val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1); |
| 1157 | if (val < 0) |
| 1158 | return val; |
| 1159 | |
| 1160 | val |= MDIO_PCS_CTRL1_CLKSTOP_EN; |
| 1161 | phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, val); |
| 1162 | } |
| 1163 | |
| 1164 | return 0; /* EEE supported */ |
| 1165 | } |
| 1166 | eee_exit_err: |
| 1167 | return -EPROTONOSUPPORT; |
| 1168 | } |
| 1169 | EXPORT_SYMBOL(phy_init_eee); |
| 1170 | |
| 1171 | /** |
| 1172 | * phy_get_eee_err - report the EEE wake error count |
| 1173 | * @phydev: target phy_device struct |
| 1174 | * |
| 1175 | * Description: it is to report the number of time where the PHY |
| 1176 | * failed to complete its normal wake sequence. |
| 1177 | */ |
| 1178 | int phy_get_eee_err(struct phy_device *phydev) |
| 1179 | { |
| 1180 | if (!phydev->drv) |
| 1181 | return -EIO; |
| 1182 | |
| 1183 | return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR); |
| 1184 | } |
| 1185 | EXPORT_SYMBOL(phy_get_eee_err); |
| 1186 | |
| 1187 | /** |
| 1188 | * phy_ethtool_get_eee - get EEE supported and status |
| 1189 | * @phydev: target phy_device struct |
| 1190 | * @data: ethtool_eee data |
| 1191 | * |
| 1192 | * Description: it reportes the Supported/Advertisement/LP Advertisement |
| 1193 | * capabilities. |
| 1194 | */ |
| 1195 | int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data) |
| 1196 | { |
| 1197 | int val; |
| 1198 | |
| 1199 | if (!phydev->drv) |
| 1200 | return -EIO; |
| 1201 | |
| 1202 | /* Get Supported EEE */ |
| 1203 | val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); |
| 1204 | if (val < 0) |
| 1205 | return val; |
| 1206 | data->supported = mmd_eee_cap_to_ethtool_sup_t(val); |
| 1207 | |
| 1208 | /* Get advertisement EEE */ |
| 1209 | val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); |
| 1210 | if (val < 0) |
| 1211 | return val; |
| 1212 | data->advertised = mmd_eee_adv_to_ethtool_adv_t(val); |
| 1213 | |
| 1214 | /* Get LP advertisement EEE */ |
| 1215 | val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE); |
| 1216 | if (val < 0) |
| 1217 | return val; |
| 1218 | data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val); |
| 1219 | |
| 1220 | return 0; |
| 1221 | } |
| 1222 | EXPORT_SYMBOL(phy_ethtool_get_eee); |
| 1223 | |
| 1224 | /** |
| 1225 | * phy_ethtool_set_eee - set EEE supported and status |
| 1226 | * @phydev: target phy_device struct |
| 1227 | * @data: ethtool_eee data |
| 1228 | * |
| 1229 | * Description: it is to program the Advertisement EEE register. |
| 1230 | */ |
| 1231 | int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) |
| 1232 | { |
| 1233 | int cap, old_adv, adv, ret; |
| 1234 | |
| 1235 | if (!phydev->drv) |
| 1236 | return -EIO; |
| 1237 | |
| 1238 | /* Get Supported EEE */ |
| 1239 | cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); |
| 1240 | if (cap < 0) |
| 1241 | return cap; |
| 1242 | |
| 1243 | old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); |
| 1244 | if (old_adv < 0) |
| 1245 | return old_adv; |
| 1246 | |
| 1247 | adv = ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap; |
| 1248 | |
| 1249 | /* Mask prohibited EEE modes */ |
| 1250 | adv &= ~phydev->eee_broken_modes; |
| 1251 | |
| 1252 | if (old_adv != adv) { |
| 1253 | ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv); |
| 1254 | if (ret < 0) |
| 1255 | return ret; |
| 1256 | |
| 1257 | /* Restart autonegotiation so the new modes get sent to the |
| 1258 | * link partner. |
| 1259 | */ |
| 1260 | ret = phy_restart_aneg(phydev); |
| 1261 | if (ret < 0) |
| 1262 | return ret; |
| 1263 | } |
| 1264 | |
| 1265 | return 0; |
| 1266 | } |
| 1267 | EXPORT_SYMBOL(phy_ethtool_set_eee); |
| 1268 | |
| 1269 | int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) |
| 1270 | { |
| 1271 | if (phydev->drv && phydev->drv->set_wol) |
| 1272 | return phydev->drv->set_wol(phydev, wol); |
| 1273 | |
| 1274 | return -EOPNOTSUPP; |
| 1275 | } |
| 1276 | EXPORT_SYMBOL(phy_ethtool_set_wol); |
| 1277 | |
| 1278 | void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) |
| 1279 | { |
| 1280 | if (phydev->drv && phydev->drv->get_wol) |
| 1281 | phydev->drv->get_wol(phydev, wol); |
| 1282 | } |
| 1283 | EXPORT_SYMBOL(phy_ethtool_get_wol); |
| 1284 | |
| 1285 | int phy_ethtool_get_link_ksettings(struct net_device *ndev, |
| 1286 | struct ethtool_link_ksettings *cmd) |
| 1287 | { |
| 1288 | struct phy_device *phydev = ndev->phydev; |
| 1289 | |
| 1290 | if (!phydev) |
| 1291 | return -ENODEV; |
| 1292 | |
| 1293 | phy_ethtool_ksettings_get(phydev, cmd); |
| 1294 | |
| 1295 | return 0; |
| 1296 | } |
| 1297 | EXPORT_SYMBOL(phy_ethtool_get_link_ksettings); |
| 1298 | |
| 1299 | int phy_ethtool_set_link_ksettings(struct net_device *ndev, |
| 1300 | const struct ethtool_link_ksettings *cmd) |
| 1301 | { |
| 1302 | struct phy_device *phydev = ndev->phydev; |
| 1303 | |
| 1304 | if (!phydev) |
| 1305 | return -ENODEV; |
| 1306 | |
| 1307 | return phy_ethtool_ksettings_set(phydev, cmd); |
| 1308 | } |
| 1309 | EXPORT_SYMBOL(phy_ethtool_set_link_ksettings); |
| 1310 | |
| 1311 | int phy_ethtool_nway_reset(struct net_device *ndev) |
| 1312 | { |
| 1313 | struct phy_device *phydev = ndev->phydev; |
| 1314 | |
| 1315 | if (!phydev) |
| 1316 | return -ENODEV; |
| 1317 | |
| 1318 | if (!phydev->drv) |
| 1319 | return -EIO; |
| 1320 | |
| 1321 | return phy_restart_aneg(phydev); |
| 1322 | } |
| 1323 | EXPORT_SYMBOL(phy_ethtool_nway_reset); |