/* Framework for configuring and reading PHY devices * Based on code in sungem_phy.c and gianfar_phy.c * * Author: Andy Fleming * * Copyright (c) 2004 Freescale Semiconductor, Inc. * Copyright (c) 2006, 2007 Maciej W. Rozycki * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define PHY_STATE_STR(_state) \ case PHY_##_state: \ return __stringify(_state); \ static const char *phy_state_to_str(enum phy_state st) { switch (st) { PHY_STATE_STR(DOWN) PHY_STATE_STR(STARTING) PHY_STATE_STR(READY) PHY_STATE_STR(PENDING) PHY_STATE_STR(UP) PHY_STATE_STR(AN) PHY_STATE_STR(RUNNING) PHY_STATE_STR(NOLINK) PHY_STATE_STR(FORCING) PHY_STATE_STR(CHANGELINK) PHY_STATE_STR(HALTED) PHY_STATE_STR(RESUMING) } return NULL; } /** * phy_print_status - Convenience function to print out the current phy status * @phydev: the phy_device struct */ void phy_print_status(struct phy_device *phydev) { if (phydev->link) { netdev_info(phydev->attached_dev, "Link is Up - %s/%s - flow control %s\n", phy_speed_to_str(phydev->speed), phy_duplex_to_str(phydev->duplex), phydev->pause ? "rx/tx" : "off"); } else { netdev_info(phydev->attached_dev, "Link is Down\n"); } } EXPORT_SYMBOL(phy_print_status); /** * phy_clear_interrupt - Ack the phy device's interrupt * @phydev: the phy_device struct * * If the @phydev driver has an ack_interrupt function, call it to * ack and clear the phy device's interrupt. * * Returns 0 on success or < 0 on error. */ static int phy_clear_interrupt(struct phy_device *phydev) { if (phydev->drv->ack_interrupt) return phydev->drv->ack_interrupt(phydev); return 0; } /** * phy_config_interrupt - configure the PHY device for the requested interrupts * @phydev: the phy_device struct * @interrupts: interrupt flags to configure for this @phydev * * Returns 0 on success or < 0 on error. */ static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts) { phydev->interrupts = interrupts; if (phydev->drv->config_intr) return phydev->drv->config_intr(phydev); return 0; } /** * phy_restart_aneg - restart auto-negotiation * @phydev: target phy_device struct * * Restart the autonegotiation on @phydev. Returns >= 0 on success or * negative errno on error. */ int phy_restart_aneg(struct phy_device *phydev) { int ret; if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0))) ret = genphy_c45_restart_aneg(phydev); else ret = genphy_restart_aneg(phydev); return ret; } EXPORT_SYMBOL_GPL(phy_restart_aneg); /** * phy_aneg_done - return auto-negotiation status * @phydev: target phy_device struct * * Description: Return the auto-negotiation status from this @phydev * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation * is still pending. */ int phy_aneg_done(struct phy_device *phydev) { if (phydev->drv && phydev->drv->aneg_done) return phydev->drv->aneg_done(phydev); /* Avoid genphy_aneg_done() if the Clause 45 PHY does not * implement Clause 22 registers */ if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0))) return -EINVAL; return genphy_aneg_done(phydev); } EXPORT_SYMBOL(phy_aneg_done); /** * phy_find_valid - find a PHY setting that matches the requested parameters * @speed: desired speed * @duplex: desired duplex * @supported: mask of supported link modes * * Locate a supported phy setting that is, in priority order: * - an exact match for the specified speed and duplex mode * - a match for the specified speed, or slower speed * - the slowest supported speed * Returns the matched phy_setting entry, or %NULL if no supported phy * settings were found. */ static const struct phy_setting * phy_find_valid(int speed, int duplex, u32 supported) { unsigned long mask = supported; return phy_lookup_setting(speed, duplex, &mask, BITS_PER_LONG, false); } /** * phy_supported_speeds - return all speeds currently supported by a phy device * @phy: The phy device to return supported speeds of. * @speeds: buffer to store supported speeds in. * @size: size of speeds buffer. * * Description: Returns the number of supported speeds, and fills the speeds * buffer with the supported speeds. If speeds buffer is too small to contain * all currently supported speeds, will return as many speeds as can fit. */ unsigned int phy_supported_speeds(struct phy_device *phy, unsigned int *speeds, unsigned int size) { unsigned long supported = phy->supported; return phy_speeds(speeds, size, &supported, BITS_PER_LONG); } /** * phy_check_valid - check if there is a valid PHY setting which matches * speed, duplex, and feature mask * @speed: speed to match * @duplex: duplex to match * @features: A mask of the valid settings * * Description: Returns true if there is a valid setting, false otherwise. */ static inline bool phy_check_valid(int speed, int duplex, u32 features) { unsigned long mask = features; return !!phy_lookup_setting(speed, duplex, &mask, BITS_PER_LONG, true); } /** * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex * @phydev: the target phy_device struct * * Description: Make sure the PHY is set to supported speeds and * duplexes. Drop down by one in this order: 1000/FULL, * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF. */ static void phy_sanitize_settings(struct phy_device *phydev) { const struct phy_setting *setting; u32 features = phydev->supported; /* Sanitize settings based on PHY capabilities */ if ((features & SUPPORTED_Autoneg) == 0) phydev->autoneg = AUTONEG_DISABLE; setting = phy_find_valid(phydev->speed, phydev->duplex, features); if (setting) { phydev->speed = setting->speed; phydev->duplex = setting->duplex; } else { /* We failed to find anything (no supported speeds?) */ phydev->speed = SPEED_UNKNOWN; phydev->duplex = DUPLEX_UNKNOWN; } } /** * phy_ethtool_sset - generic ethtool sset function, handles all the details * @phydev: target phy_device struct * @cmd: ethtool_cmd * * A few notes about parameter checking: * * - We don't set port or transceiver, so we don't care what they * were set to. * - phy_start_aneg() will make sure forced settings are sane, and * choose the next best ones from the ones selected, so we don't * care if ethtool tries to give us bad values. */ int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd) { u32 speed = ethtool_cmd_speed(cmd); if (cmd->phy_address != phydev->mdio.addr) return -EINVAL; /* We make sure that we don't pass unsupported values in to the PHY */ cmd->advertising &= phydev->supported; /* Verify the settings we care about. */ if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE) return -EINVAL; if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0) return -EINVAL; if (cmd->autoneg == AUTONEG_DISABLE && ((speed != SPEED_1000 && speed != SPEED_100 && speed != SPEED_10) || (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL))) return -EINVAL; phydev->autoneg = cmd->autoneg; phydev->speed = speed; phydev->advertising = cmd->advertising; if (AUTONEG_ENABLE == cmd->autoneg) phydev->advertising |= ADVERTISED_Autoneg; else phydev->advertising &= ~ADVERTISED_Autoneg; phydev->duplex = cmd->duplex; phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl; /* Restart the PHY */ phy_start_aneg(phydev); return 0; } EXPORT_SYMBOL(phy_ethtool_sset); int phy_ethtool_ksettings_set(struct phy_device *phydev, const struct ethtool_link_ksettings *cmd) { u8 autoneg = cmd->base.autoneg; u8 duplex = cmd->base.duplex; u32 speed = cmd->base.speed; u32 advertising; if (cmd->base.phy_address != phydev->mdio.addr) return -EINVAL; ethtool_convert_link_mode_to_legacy_u32(&advertising, cmd->link_modes.advertising); /* We make sure that we don't pass unsupported values in to the PHY */ advertising &= phydev->supported; /* Verify the settings we care about. */ if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE) return -EINVAL; if (autoneg == AUTONEG_ENABLE && advertising == 0) return -EINVAL; if (autoneg == AUTONEG_DISABLE && ((speed != SPEED_1000 && speed != SPEED_100 && speed != SPEED_10) || (duplex != DUPLEX_HALF && duplex != DUPLEX_FULL))) return -EINVAL; phydev->autoneg = autoneg; phydev->speed = speed; phydev->advertising = advertising; if (autoneg == AUTONEG_ENABLE) phydev->advertising |= ADVERTISED_Autoneg; else phydev->advertising &= ~ADVERTISED_Autoneg; phydev->duplex = duplex; phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl; /* Restart the PHY */ phy_start_aneg(phydev); return 0; } EXPORT_SYMBOL(phy_ethtool_ksettings_set); void phy_ethtool_ksettings_get(struct phy_device *phydev, struct ethtool_link_ksettings *cmd) { ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, phydev->supported); ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, phydev->advertising); ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising, phydev->lp_advertising); cmd->base.speed = phydev->speed; cmd->base.duplex = phydev->duplex; if (phydev->interface == PHY_INTERFACE_MODE_MOCA) cmd->base.port = PORT_BNC; else cmd->base.port = PORT_MII; cmd->base.transceiver = phy_is_internal(phydev) ? XCVR_INTERNAL : XCVR_EXTERNAL; cmd->base.phy_address = phydev->mdio.addr; cmd->base.autoneg = phydev->autoneg; cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl; cmd->base.eth_tp_mdix = phydev->mdix; } EXPORT_SYMBOL(phy_ethtool_ksettings_get); /** * phy_mii_ioctl - generic PHY MII ioctl interface * @phydev: the phy_device struct * @ifr: &struct ifreq for socket ioctl's * @cmd: ioctl cmd to execute * * Note that this function is currently incompatible with the * PHYCONTROL layer. It changes registers without regard to * current state. Use at own risk. */ int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd) { struct mii_ioctl_data *mii_data = if_mii(ifr); u16 val = mii_data->val_in; bool change_autoneg = false; switch (cmd) { case SIOCGMIIPHY: mii_data->phy_id = phydev->mdio.addr; /* fall through */ case SIOCGMIIREG: mii_data->val_out = mdiobus_read(phydev->mdio.bus, mii_data->phy_id, mii_data->reg_num); return 0; case SIOCSMIIREG: if (mii_data->phy_id == phydev->mdio.addr) { switch (mii_data->reg_num) { case MII_BMCR: if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) { if (phydev->autoneg == AUTONEG_ENABLE) change_autoneg = true; phydev->autoneg = AUTONEG_DISABLE; if (val & BMCR_FULLDPLX) phydev->duplex = DUPLEX_FULL; else phydev->duplex = DUPLEX_HALF; if (val & BMCR_SPEED1000) phydev->speed = SPEED_1000; else if (val & BMCR_SPEED100) phydev->speed = SPEED_100; else phydev->speed = SPEED_10; } else { if (phydev->autoneg == AUTONEG_DISABLE) change_autoneg = true; phydev->autoneg = AUTONEG_ENABLE; } break; case MII_ADVERTISE: phydev->advertising = mii_adv_to_ethtool_adv_t(val); change_autoneg = true; break; default: /* do nothing */ break; } } mdiobus_write(phydev->mdio.bus, mii_data->phy_id, mii_data->reg_num, val); if (mii_data->phy_id == phydev->mdio.addr && mii_data->reg_num == MII_BMCR && val & BMCR_RESET) return phy_init_hw(phydev); if (change_autoneg) return phy_start_aneg(phydev); return 0; case SIOCSHWTSTAMP: if (phydev->drv && phydev->drv->hwtstamp) return phydev->drv->hwtstamp(phydev, ifr); /* fall through */ default: return -EOPNOTSUPP; } } EXPORT_SYMBOL(phy_mii_ioctl); static int phy_config_aneg(struct phy_device *phydev) { if (phydev->drv->config_aneg) return phydev->drv->config_aneg(phydev); else return genphy_config_aneg(phydev); } /** * phy_start_aneg_priv - start auto-negotiation for this PHY device * @phydev: the phy_device struct * @sync: indicate whether we should wait for the workqueue cancelation * * Description: Sanitizes the settings (if we're not autonegotiating * them), and then calls the driver's config_aneg function. * If the PHYCONTROL Layer is operating, we change the state to * reflect the beginning of Auto-negotiation or forcing. */ static int phy_start_aneg_priv(struct phy_device *phydev, bool sync) { bool trigger = 0; int err; if (!phydev->drv) return -EIO; mutex_lock(&phydev->lock); if (AUTONEG_DISABLE == phydev->autoneg) phy_sanitize_settings(phydev); /* Invalidate LP advertising flags */ phydev->lp_advertising = 0; err = phy_config_aneg(phydev); if (err < 0) goto out_unlock; if (phydev->state != PHY_HALTED) { if (AUTONEG_ENABLE == phydev->autoneg) { phydev->state = PHY_AN; phydev->link_timeout = PHY_AN_TIMEOUT; } else { phydev->state = PHY_FORCING; phydev->link_timeout = PHY_FORCE_TIMEOUT; } } /* Re-schedule a PHY state machine to check PHY status because * negotiation may already be done and aneg interrupt may not be * generated. */ if (phy_interrupt_is_valid(phydev) && (phydev->state == PHY_AN)) { err = phy_aneg_done(phydev); if (err > 0) { trigger = true; err = 0; } } out_unlock: mutex_unlock(&phydev->lock); if (trigger) phy_trigger_machine(phydev, sync); return err; } /** * phy_start_aneg - start auto-negotiation for this PHY device * @phydev: the phy_device struct * * Description: Sanitizes the settings (if we're not autonegotiating * them), and then calls the driver's config_aneg function. * If the PHYCONTROL Layer is operating, we change the state to * reflect the beginning of Auto-negotiation or forcing. */ int phy_start_aneg(struct phy_device *phydev) { return phy_start_aneg_priv(phydev, true); } EXPORT_SYMBOL(phy_start_aneg); static int phy_poll_aneg_done(struct phy_device *phydev) { unsigned int retries = 100; int ret; do { msleep(100); ret = phy_aneg_done(phydev); } while (!ret && --retries); if (!ret) return -ETIMEDOUT; return ret < 0 ? ret : 0; } /** * phy_speed_down - set speed to lowest speed supported by both link partners * @phydev: the phy_device struct * @sync: perform action synchronously * * Description: Typically used to save energy when waiting for a WoL packet * * WARNING: Setting sync to false may cause the system being unable to suspend * in case the PHY generates an interrupt when finishing the autonegotiation. * This interrupt may wake up the system immediately after suspend. * Therefore use sync = false only if you're sure it's safe with the respective * network chip. */ int phy_speed_down(struct phy_device *phydev, bool sync) { u32 adv = phydev->lp_advertising & phydev->supported; u32 adv_old = phydev->advertising; int ret; if (phydev->autoneg != AUTONEG_ENABLE) return 0; if (adv & PHY_10BT_FEATURES) phydev->advertising &= ~(PHY_100BT_FEATURES | PHY_1000BT_FEATURES); else if (adv & PHY_100BT_FEATURES) phydev->advertising &= ~PHY_1000BT_FEATURES; if (phydev->advertising == adv_old) return 0; ret = phy_config_aneg(phydev); if (ret) return ret; return sync ? phy_poll_aneg_done(phydev) : 0; } EXPORT_SYMBOL_GPL(phy_speed_down); /** * phy_speed_up - (re)set advertised speeds to all supported speeds * @phydev: the phy_device struct * * Description: Used to revert the effect of phy_speed_down */ int phy_speed_up(struct phy_device *phydev) { u32 mask = PHY_10BT_FEATURES | PHY_100BT_FEATURES | PHY_1000BT_FEATURES; u32 adv_old = phydev->advertising; if (phydev->autoneg != AUTONEG_ENABLE) return 0; phydev->advertising = (adv_old & ~mask) | (phydev->supported & mask); if (phydev->advertising == adv_old) return 0; return phy_config_aneg(phydev); } EXPORT_SYMBOL_GPL(phy_speed_up); /** * phy_start_machine - start PHY state machine tracking * @phydev: the phy_device struct * * Description: The PHY infrastructure can run a state machine * which tracks whether the PHY is starting up, negotiating, * etc. This function starts the delayed workqueue which tracks * the state of the PHY. If you want to maintain your own state machine, * do not call this function. */ void phy_start_machine(struct phy_device *phydev) { queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ); } EXPORT_SYMBOL_GPL(phy_start_machine); /** * phy_trigger_machine - trigger the state machine to run * * @phydev: the phy_device struct * @sync: indicate whether we should wait for the workqueue cancelation * * Description: There has been a change in state which requires that the * state machine runs. */ void phy_trigger_machine(struct phy_device *phydev, bool sync) { if (sync) cancel_delayed_work_sync(&phydev->state_queue); else cancel_delayed_work(&phydev->state_queue); queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0); } /** * phy_stop_machine - stop the PHY state machine tracking * @phydev: target phy_device struct * * Description: Stops the state machine delayed workqueue, sets the * state to UP (unless it wasn't up yet). This function must be * called BEFORE phy_detach. */ void phy_stop_machine(struct phy_device *phydev) { cancel_delayed_work_sync(&phydev->state_queue); mutex_lock(&phydev->lock); if (phydev->state > PHY_UP && phydev->state != PHY_HALTED) phydev->state = PHY_UP; mutex_unlock(&phydev->lock); } /** * phy_error - enter HALTED state for this PHY device * @phydev: target phy_device struct * * Moves the PHY to the HALTED state in response to a read * or write error, and tells the controller the link is down. * Must not be called from interrupt context, or while the * phydev->lock is held. */ static void phy_error(struct phy_device *phydev) { mutex_lock(&phydev->lock); phydev->state = PHY_HALTED; mutex_unlock(&phydev->lock); phy_trigger_machine(phydev, false); } /** * phy_disable_interrupts - Disable the PHY interrupts from the PHY side * @phydev: target phy_device struct */ static int phy_disable_interrupts(struct phy_device *phydev) { int err; /* Disable PHY interrupts */ err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); if (err) return err; /* Clear the interrupt */ return phy_clear_interrupt(phydev); } /** * phy_change - Called by the phy_interrupt to handle PHY changes * @phydev: phy_device struct that interrupted */ static irqreturn_t phy_change(struct phy_device *phydev) { if (phy_interrupt_is_valid(phydev)) { if (phydev->drv->did_interrupt && !phydev->drv->did_interrupt(phydev)) return IRQ_NONE; if (phydev->state == PHY_HALTED) if (phy_disable_interrupts(phydev)) goto phy_err; } mutex_lock(&phydev->lock); if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state)) phydev->state = PHY_CHANGELINK; mutex_unlock(&phydev->lock); /* reschedule state queue work to run as soon as possible */ phy_trigger_machine(phydev, true); if (phy_interrupt_is_valid(phydev) && phy_clear_interrupt(phydev)) goto phy_err; return IRQ_HANDLED; phy_err: phy_error(phydev); return IRQ_NONE; } /** * phy_change_work - Scheduled by the phy_mac_interrupt to handle PHY changes * @work: work_struct that describes the work to be done */ void phy_change_work(struct work_struct *work) { struct phy_device *phydev = container_of(work, struct phy_device, phy_queue); phy_change(phydev); } /** * phy_interrupt - PHY interrupt handler * @irq: interrupt line * @phy_dat: phy_device pointer * * Description: When a PHY interrupt occurs, the handler disables * interrupts, and uses phy_change to handle the interrupt. */ static irqreturn_t phy_interrupt(int irq, void *phy_dat) { struct phy_device *phydev = phy_dat; if (PHY_HALTED == phydev->state) return IRQ_NONE; /* It can't be ours. */ return phy_change(phydev); } /** * phy_enable_interrupts - Enable the interrupts from the PHY side * @phydev: target phy_device struct */ static int phy_enable_interrupts(struct phy_device *phydev) { int err = phy_clear_interrupt(phydev); if (err < 0) return err; return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); } /** * phy_start_interrupts - request and enable interrupts for a PHY device * @phydev: target phy_device struct * * Description: Request the interrupt for the given PHY. * If this fails, then we set irq to PHY_POLL. * Otherwise, we enable the interrupts in the PHY. * This should only be called with a valid IRQ number. * Returns 0 on success or < 0 on error. */ int phy_start_interrupts(struct phy_device *phydev) { if (request_threaded_irq(phydev->irq, NULL, phy_interrupt, IRQF_ONESHOT | IRQF_SHARED, phydev_name(phydev), phydev) < 0) { pr_warn("%s: Can't get IRQ %d (PHY)\n", phydev->mdio.bus->name, phydev->irq); phydev->irq = PHY_POLL; return 0; } return phy_enable_interrupts(phydev); } EXPORT_SYMBOL(phy_start_interrupts); /** * phy_stop_interrupts - disable interrupts from a PHY device * @phydev: target phy_device struct */ int phy_stop_interrupts(struct phy_device *phydev) { int err = phy_disable_interrupts(phydev); if (err) phy_error(phydev); free_irq(phydev->irq, phydev); return err; } EXPORT_SYMBOL(phy_stop_interrupts); /** * phy_stop - Bring down the PHY link, and stop checking the status * @phydev: target phy_device struct */ void phy_stop(struct phy_device *phydev) { mutex_lock(&phydev->lock); if (PHY_HALTED == phydev->state) goto out_unlock; if (phy_interrupt_is_valid(phydev)) phy_disable_interrupts(phydev); phydev->state = PHY_HALTED; out_unlock: mutex_unlock(&phydev->lock); /* Cannot call flush_scheduled_work() here as desired because * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change() * will not reenable interrupts. */ } EXPORT_SYMBOL(phy_stop); /** * phy_start - start or restart a PHY device * @phydev: target phy_device struct * * Description: Indicates the attached device's readiness to * handle PHY-related work. Used during startup to start the * PHY, and after a call to phy_stop() to resume operation. * Also used to indicate the MDIO bus has cleared an error * condition. */ void phy_start(struct phy_device *phydev) { int err = 0; mutex_lock(&phydev->lock); switch (phydev->state) { case PHY_STARTING: phydev->state = PHY_PENDING; break; case PHY_READY: phydev->state = PHY_UP; break; case PHY_HALTED: /* if phy was suspended, bring the physical link up again */ __phy_resume(phydev); /* make sure interrupts are re-enabled for the PHY */ if (phy_interrupt_is_valid(phydev)) { err = phy_enable_interrupts(phydev); if (err < 0) break; } phydev->state = PHY_RESUMING; break; default: break; } mutex_unlock(&phydev->lock); phy_trigger_machine(phydev, true); } EXPORT_SYMBOL(phy_start); static void phy_link_up(struct phy_device *phydev) { phydev->phy_link_change(phydev, true, true); phy_led_trigger_change_speed(phydev); } static void phy_link_down(struct phy_device *phydev, bool do_carrier) { phydev->phy_link_change(phydev, false, do_carrier); phy_led_trigger_change_speed(phydev); } /** * phy_state_machine - Handle the state machine * @work: work_struct that describes the work to be done */ void phy_state_machine(struct work_struct *work) { struct delayed_work *dwork = to_delayed_work(work); struct phy_device *phydev = container_of(dwork, struct phy_device, state_queue); bool needs_aneg = false, do_suspend = false; enum phy_state old_state; int err = 0; int old_link; mutex_lock(&phydev->lock); old_state = phydev->state; if (phydev->drv && phydev->drv->link_change_notify) phydev->drv->link_change_notify(phydev); switch (phydev->state) { case PHY_DOWN: case PHY_STARTING: case PHY_READY: case PHY_PENDING: break; case PHY_UP: needs_aneg = true; phydev->link_timeout = PHY_AN_TIMEOUT; break; case PHY_AN: err = phy_read_status(phydev); if (err < 0) break; /* If the link is down, give up on negotiation for now */ if (!phydev->link) { phydev->state = PHY_NOLINK; phy_link_down(phydev, true); break; } /* Check if negotiation is done. Break if there's an error */ err = phy_aneg_done(phydev); if (err < 0) break; /* If AN is done, we're running */ if (err > 0) { phydev->state = PHY_RUNNING; phy_link_up(phydev); } else if (0 == phydev->link_timeout--) needs_aneg = true; break; case PHY_NOLINK: if (phydev->irq != PHY_POLL) break; err = phy_read_status(phydev); if (err) break; if (phydev->link) { if (AUTONEG_ENABLE == phydev->autoneg) { err = phy_aneg_done(phydev); if (err < 0) break; if (!err) { phydev->state = PHY_AN; phydev->link_timeout = PHY_AN_TIMEOUT; break; } } phydev->state = PHY_RUNNING; phy_link_up(phydev); } break; case PHY_FORCING: err = genphy_update_link(phydev); if (err) break; if (phydev->link) { phydev->state = PHY_RUNNING; phy_link_up(phydev); } else { if (0 == phydev->link_timeout--) needs_aneg = true; phy_link_down(phydev, false); } break; case PHY_RUNNING: /* Only register a CHANGE if we are polling and link changed * since latest checking. */ if (phydev->irq == PHY_POLL) { old_link = phydev->link; err = phy_read_status(phydev); if (err) break; if (old_link != phydev->link) phydev->state = PHY_CHANGELINK; } /* * Failsafe: check that nobody set phydev->link=0 between two * poll cycles, otherwise we won't leave RUNNING state as long * as link remains down. */ if (!phydev->link && phydev->state == PHY_RUNNING) { phydev->state = PHY_CHANGELINK; phydev_err(phydev, "no link in PHY_RUNNING\n"); } break; case PHY_CHANGELINK: err = phy_read_status(phydev); if (err) break; if (phydev->link) { phydev->state = PHY_RUNNING; phy_link_up(phydev); } else { phydev->state = PHY_NOLINK; phy_link_down(phydev, true); } break; case PHY_HALTED: if (phydev->link) { phydev->link = 0; phy_link_down(phydev, true); do_suspend = true; } break; case PHY_RESUMING: if (AUTONEG_ENABLE == phydev->autoneg) { err = phy_aneg_done(phydev); if (err < 0) break; /* err > 0 if AN is done. * Otherwise, it's 0, and we're still waiting for AN */ if (err > 0) { err = phy_read_status(phydev); if (err) break; if (phydev->link) { phydev->state = PHY_RUNNING; phy_link_up(phydev); } else { phydev->state = PHY_NOLINK; phy_link_down(phydev, false); } } else { phydev->state = PHY_AN; phydev->link_timeout = PHY_AN_TIMEOUT; } } else { err = phy_read_status(phydev); if (err) break; if (phydev->link) { phydev->state = PHY_RUNNING; phy_link_up(phydev); } else { phydev->state = PHY_NOLINK; phy_link_down(phydev, false); } } break; } mutex_unlock(&phydev->lock); if (needs_aneg) err = phy_start_aneg_priv(phydev, false); else if (do_suspend) phy_suspend(phydev); if (err < 0) phy_error(phydev); if (old_state != phydev->state) phydev_dbg(phydev, "PHY state change %s -> %s\n", phy_state_to_str(old_state), phy_state_to_str(phydev->state)); /* Only re-schedule a PHY state machine change if we are polling the * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving * between states from phy_mac_interrupt() */ if (phydev->irq == PHY_POLL) queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, PHY_STATE_TIME * HZ); } /** * phy_mac_interrupt - MAC says the link has changed * @phydev: phy_device struct with changed link * * The MAC layer is able to indicate there has been a change in the PHY link * status. Trigger the state machine and work a work queue. */ void phy_mac_interrupt(struct phy_device *phydev) { /* Trigger a state machine change */ queue_work(system_power_efficient_wq, &phydev->phy_queue); } EXPORT_SYMBOL(phy_mac_interrupt); /** * phy_init_eee - init and check the EEE feature * @phydev: target phy_device struct * @clk_stop_enable: PHY may stop the clock during LPI * * Description: it checks if the Energy-Efficient Ethernet (EEE) * is supported by looking at the MMD registers 3.20 and 7.60/61 * and it programs the MMD register 3.0 setting the "Clock stop enable" * bit if required. */ int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable) { if (!phydev->drv) return -EIO; /* According to 802.3az,the EEE is supported only in full duplex-mode. */ if (phydev->duplex == DUPLEX_FULL) { int eee_lp, eee_cap, eee_adv; u32 lp, cap, adv; int status; /* Read phy status to properly get the right settings */ status = phy_read_status(phydev); if (status) return status; /* First check if the EEE ability is supported */ eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); if (eee_cap <= 0) goto eee_exit_err; cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap); if (!cap) goto eee_exit_err; /* Check which link settings negotiated and verify it in * the EEE advertising registers. */ eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE); if (eee_lp <= 0) goto eee_exit_err; eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); if (eee_adv <= 0) goto eee_exit_err; adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv); lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp); if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv)) goto eee_exit_err; if (clk_stop_enable) { /* Configure the PHY to stop receiving xMII * clock while it is signaling LPI. */ int val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1); if (val < 0) return val; val |= MDIO_PCS_CTRL1_CLKSTOP_EN; phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, val); } return 0; /* EEE supported */ } eee_exit_err: return -EPROTONOSUPPORT; } EXPORT_SYMBOL(phy_init_eee); /** * phy_get_eee_err - report the EEE wake error count * @phydev: target phy_device struct * * Description: it is to report the number of time where the PHY * failed to complete its normal wake sequence. */ int phy_get_eee_err(struct phy_device *phydev) { if (!phydev->drv) return -EIO; return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR); } EXPORT_SYMBOL(phy_get_eee_err); /** * phy_ethtool_get_eee - get EEE supported and status * @phydev: target phy_device struct * @data: ethtool_eee data * * Description: it reportes the Supported/Advertisement/LP Advertisement * capabilities. */ int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data) { int val; if (!phydev->drv) return -EIO; /* Get Supported EEE */ val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); if (val < 0) return val; data->supported = mmd_eee_cap_to_ethtool_sup_t(val); /* Get advertisement EEE */ val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); if (val < 0) return val; data->advertised = mmd_eee_adv_to_ethtool_adv_t(val); /* Get LP advertisement EEE */ val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE); if (val < 0) return val; data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val); return 0; } EXPORT_SYMBOL(phy_ethtool_get_eee); /** * phy_ethtool_set_eee - set EEE supported and status * @phydev: target phy_device struct * @data: ethtool_eee data * * Description: it is to program the Advertisement EEE register. */ int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) { int cap, old_adv, adv, ret; if (!phydev->drv) return -EIO; /* Get Supported EEE */ cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); if (cap < 0) return cap; old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); if (old_adv < 0) return old_adv; adv = ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap; /* Mask prohibited EEE modes */ adv &= ~phydev->eee_broken_modes; if (old_adv != adv) { ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv); if (ret < 0) return ret; /* Restart autonegotiation so the new modes get sent to the * link partner. */ ret = phy_restart_aneg(phydev); if (ret < 0) return ret; } return 0; } EXPORT_SYMBOL(phy_ethtool_set_eee); int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) { if (phydev->drv && phydev->drv->set_wol) return phydev->drv->set_wol(phydev, wol); return -EOPNOTSUPP; } EXPORT_SYMBOL(phy_ethtool_set_wol); void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) { if (phydev->drv && phydev->drv->get_wol) phydev->drv->get_wol(phydev, wol); } EXPORT_SYMBOL(phy_ethtool_get_wol); int phy_ethtool_get_link_ksettings(struct net_device *ndev, struct ethtool_link_ksettings *cmd) { struct phy_device *phydev = ndev->phydev; if (!phydev) return -ENODEV; phy_ethtool_ksettings_get(phydev, cmd); return 0; } EXPORT_SYMBOL(phy_ethtool_get_link_ksettings); int phy_ethtool_set_link_ksettings(struct net_device *ndev, const struct ethtool_link_ksettings *cmd) { struct phy_device *phydev = ndev->phydev; if (!phydev) return -ENODEV; return phy_ethtool_ksettings_set(phydev, cmd); } EXPORT_SYMBOL(phy_ethtool_set_link_ksettings); int phy_ethtool_nway_reset(struct net_device *ndev) { struct phy_device *phydev = ndev->phydev; if (!phydev) return -ENODEV; if (!phydev->drv) return -EIO; return phy_restart_aneg(phydev); } EXPORT_SYMBOL(phy_ethtool_nway_reset);