From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/net/phy/phy.c | 1211 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1211 insertions(+) create mode 100644 drivers/net/phy/phy.c (limited to 'drivers/net/phy/phy.c') diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c new file mode 100644 index 000000000..47cd57805 --- /dev/null +++ b/drivers/net/phy/phy.c @@ -0,0 +1,1211 @@ +/* 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 + +static const char *phy_speed_to_str(int speed) +{ + switch (speed) { + case SPEED_10: + return "10Mbps"; + case SPEED_100: + return "100Mbps"; + case SPEED_1000: + return "1Gbps"; + case SPEED_2500: + return "2.5Gbps"; + case SPEED_10000: + return "10Gbps"; + case SPEED_UNKNOWN: + return "Unknown"; + default: + return "Unsupported (update phy.c)"; + } +} + +/** + * 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), + DUPLEX_FULL == phydev->duplex ? "Full" : "Half", + 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_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. + */ +static inline int phy_aneg_done(struct phy_device *phydev) +{ + if (phydev->drv->aneg_done) + return phydev->drv->aneg_done(phydev); + + return genphy_aneg_done(phydev); +} + +/* A structure for mapping a particular speed and duplex + * combination to a particular SUPPORTED and ADVERTISED value + */ +struct phy_setting { + int speed; + int duplex; + u32 setting; +}; + +/* A mapping of all SUPPORTED settings to speed/duplex */ +static const struct phy_setting settings[] = { + { + .speed = SPEED_10000, + .duplex = DUPLEX_FULL, + .setting = SUPPORTED_10000baseKR_Full, + }, + { + .speed = SPEED_10000, + .duplex = DUPLEX_FULL, + .setting = SUPPORTED_10000baseKX4_Full, + }, + { + .speed = SPEED_10000, + .duplex = DUPLEX_FULL, + .setting = SUPPORTED_10000baseT_Full, + }, + { + .speed = SPEED_2500, + .duplex = DUPLEX_FULL, + .setting = SUPPORTED_2500baseX_Full, + }, + { + .speed = SPEED_1000, + .duplex = DUPLEX_FULL, + .setting = SUPPORTED_1000baseKX_Full, + }, + { + .speed = SPEED_1000, + .duplex = DUPLEX_FULL, + .setting = SUPPORTED_1000baseT_Full, + }, + { + .speed = SPEED_1000, + .duplex = DUPLEX_HALF, + .setting = SUPPORTED_1000baseT_Half, + }, + { + .speed = SPEED_100, + .duplex = DUPLEX_FULL, + .setting = SUPPORTED_100baseT_Full, + }, + { + .speed = SPEED_100, + .duplex = DUPLEX_HALF, + .setting = SUPPORTED_100baseT_Half, + }, + { + .speed = SPEED_10, + .duplex = DUPLEX_FULL, + .setting = SUPPORTED_10baseT_Full, + }, + { + .speed = SPEED_10, + .duplex = DUPLEX_HALF, + .setting = SUPPORTED_10baseT_Half, + }, +}; + +#define MAX_NUM_SETTINGS ARRAY_SIZE(settings) + +/** + * phy_find_setting - find a PHY settings array entry that matches speed & duplex + * @speed: speed to match + * @duplex: duplex to match + * + * Description: Searches the settings array for the setting which + * matches the desired speed and duplex, and returns the index + * of that setting. Returns the index of the last setting if + * none of the others match. + */ +static inline unsigned int phy_find_setting(int speed, int duplex) +{ + unsigned int idx = 0; + + while (idx < ARRAY_SIZE(settings) && + (settings[idx].speed != speed || settings[idx].duplex != duplex)) + idx++; + + return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1; +} + +/** + * phy_find_valid - find a PHY setting that matches the requested features mask + * @idx: The first index in settings[] to search + * @features: A mask of the valid settings + * + * Description: Returns the index of the first valid setting less + * than or equal to the one pointed to by idx, as determined by + * the mask in features. Returns the index of the last setting + * if nothing else matches. + */ +static inline unsigned int phy_find_valid(unsigned int idx, u32 features) +{ + while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features)) + idx++; + + return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1; +} + +/** + * 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 int idx; + + idx = phy_find_valid(phy_find_setting(speed, duplex), features); + + return settings[idx].speed == speed && settings[idx].duplex == duplex && + (settings[idx].setting & features); +} + +/** + * 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) +{ + u32 features = phydev->supported; + unsigned int idx; + + /* Sanitize settings based on PHY capabilities */ + if ((features & SUPPORTED_Autoneg) == 0) + phydev->autoneg = AUTONEG_DISABLE; + + idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex), + features); + + phydev->speed = settings[idx].speed; + phydev->duplex = settings[idx].duplex; +} + +/** + * 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->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; + + /* Restart the PHY */ + phy_start_aneg(phydev); + + return 0; +} +EXPORT_SYMBOL(phy_ethtool_sset); + +int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd) +{ + cmd->supported = phydev->supported; + + cmd->advertising = phydev->advertising; + cmd->lp_advertising = phydev->lp_advertising; + + ethtool_cmd_speed_set(cmd, phydev->speed); + cmd->duplex = phydev->duplex; + if (phydev->interface == PHY_INTERFACE_MODE_MOCA) + cmd->port = PORT_BNC; + else + cmd->port = PORT_MII; + cmd->phy_address = phydev->addr; + cmd->transceiver = phy_is_internal(phydev) ? + XCVR_INTERNAL : XCVR_EXTERNAL; + cmd->autoneg = phydev->autoneg; + + return 0; +} +EXPORT_SYMBOL(phy_ethtool_gset); + +/** + * 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->addr; + /* fall through */ + + case SIOCGMIIREG: + mii_data->val_out = mdiobus_read(phydev->bus, mii_data->phy_id, + mii_data->reg_num); + return 0; + + case SIOCSMIIREG: + if (mii_data->phy_id == phydev->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->bus, mii_data->phy_id, + mii_data->reg_num, val); + + if (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->hwtstamp) + return phydev->drv->hwtstamp(phydev, ifr); + /* fall through */ + + default: + return -EOPNOTSUPP; + } +} +EXPORT_SYMBOL(phy_mii_ioctl); + +/** + * 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) +{ + int err; + + mutex_lock(&phydev->lock); + + if (AUTONEG_DISABLE == phydev->autoneg) + phy_sanitize_settings(phydev); + + /* Invalidate LP advertising flags */ + phydev->lp_advertising = 0; + + err = phydev->drv->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; + } + } + +out_unlock: + mutex_unlock(&phydev->lock); + return err; +} +EXPORT_SYMBOL(phy_start_aneg); + +/** + * 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 timer 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); +} + +/** + * phy_stop_machine - stop the PHY state machine tracking + * @phydev: target phy_device struct + * + * Description: Stops the state machine timer, 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_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_interrupt - PHY interrupt handler + * @irq: interrupt line + * @phy_dat: phy_device pointer + * + * Description: When a PHY interrupt occurs, the handler disables + * interrupts, and schedules a work task to clear 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. */ + + /* The MDIO bus is not allowed to be written in interrupt + * context, so we need to disable the irq here. A work + * queue will write the PHY to disable and clear the + * interrupt, and then reenable the irq line. + */ + disable_irq_nosync(irq); + atomic_inc(&phydev->irq_disable); + + queue_work(system_power_efficient_wq, &phydev->phy_queue); + + return IRQ_HANDLED; +} + +/** + * 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_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) + goto phy_err; + + /* Clear the interrupt */ + err = phy_clear_interrupt(phydev); + if (err) + goto phy_err; + + return 0; + +phy_err: + phy_error(phydev); + + return err; +} + +/** + * 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) +{ + atomic_set(&phydev->irq_disable, 0); + if (request_irq(phydev->irq, phy_interrupt, 0, "phy_interrupt", + phydev) < 0) { + pr_warn("%s: Can't get IRQ %d (PHY)\n", + phydev->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); + + /* Cannot call flush_scheduled_work() here as desired because + * of rtnl_lock(), but we do not really care about what would + * be done, except from enable_irq(), so cancel any work + * possibly pending and take care of the matter below. + */ + cancel_work_sync(&phydev->phy_queue); + /* If work indeed has been cancelled, disable_irq() will have + * been left unbalanced from phy_interrupt() and enable_irq() + * has to be called so that other devices on the line work. + */ + while (atomic_dec_return(&phydev->irq_disable) >= 0) + enable_irq(phydev->irq); + + return err; +} +EXPORT_SYMBOL(phy_stop_interrupts); + +/** + * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes + * @work: work_struct that describes the work to be done + */ +void phy_change(struct work_struct *work) +{ + struct phy_device *phydev = + container_of(work, struct phy_device, phy_queue); + + if (phydev->drv->did_interrupt && + !phydev->drv->did_interrupt(phydev)) + goto ignore; + + 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); + + atomic_dec(&phydev->irq_disable); + enable_irq(phydev->irq); + + /* Reenable interrupts */ + if (PHY_HALTED != phydev->state && + phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED)) + goto irq_enable_err; + + /* reschedule state queue work to run as soon as possible */ + cancel_delayed_work_sync(&phydev->state_queue); + queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0); + return; + +ignore: + atomic_dec(&phydev->irq_disable); + enable_irq(phydev->irq); + return; + +irq_enable_err: + disable_irq(phydev->irq); + atomic_inc(&phydev->irq_disable); +phy_err: + phy_error(phydev); +} + +/** + * 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)) { + /* Disable PHY Interrupts */ + phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); + + /* Clear any pending interrupts */ + phy_clear_interrupt(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) +{ + bool do_resume = false; + 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: + /* make sure interrupts are re-enabled for the PHY */ + err = phy_enable_interrupts(phydev); + if (err < 0) + break; + + phydev->state = PHY_RESUMING; + do_resume = true; + break; + default: + break; + } + mutex_unlock(&phydev->lock); + + /* if phy was suspended, bring the physical link up again */ + if (do_resume) + phy_resume(phydev); +} +EXPORT_SYMBOL(phy_start); + +/** + * 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; + int err = 0; + + mutex_lock(&phydev->lock); + + if (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; + netif_carrier_off(phydev->attached_dev); + phydev->adjust_link(phydev->attached_dev); + 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; + netif_carrier_on(phydev->attached_dev); + phydev->adjust_link(phydev->attached_dev); + + } else if (0 == phydev->link_timeout--) + needs_aneg = true; + break; + case PHY_NOLINK: + 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; + netif_carrier_on(phydev->attached_dev); + phydev->adjust_link(phydev->attached_dev); + } + break; + case PHY_FORCING: + err = genphy_update_link(phydev); + if (err) + break; + + if (phydev->link) { + phydev->state = PHY_RUNNING; + netif_carrier_on(phydev->attached_dev); + } else { + if (0 == phydev->link_timeout--) + needs_aneg = true; + } + + phydev->adjust_link(phydev->attached_dev); + break; + case PHY_RUNNING: + /* Only register a CHANGE if we are + * polling or ignoring interrupts + */ + if (!phy_interrupt_is_valid(phydev)) + phydev->state = PHY_CHANGELINK; + break; + case PHY_CHANGELINK: + err = phy_read_status(phydev); + if (err) + break; + + if (phydev->link) { + phydev->state = PHY_RUNNING; + netif_carrier_on(phydev->attached_dev); + } else { + phydev->state = PHY_NOLINK; + netif_carrier_off(phydev->attached_dev); + } + + phydev->adjust_link(phydev->attached_dev); + + if (phy_interrupt_is_valid(phydev)) + err = phy_config_interrupt(phydev, + PHY_INTERRUPT_ENABLED); + break; + case PHY_HALTED: + if (phydev->link) { + phydev->link = 0; + netif_carrier_off(phydev->attached_dev); + phydev->adjust_link(phydev->attached_dev); + 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; + netif_carrier_on(phydev->attached_dev); + } else { + phydev->state = PHY_NOLINK; + } + phydev->adjust_link(phydev->attached_dev); + } 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; + netif_carrier_on(phydev->attached_dev); + } else { + phydev->state = PHY_NOLINK; + } + phydev->adjust_link(phydev->attached_dev); + } + break; + } + + mutex_unlock(&phydev->lock); + + if (needs_aneg) + err = phy_start_aneg(phydev); + else if (do_suspend) + phy_suspend(phydev); + + if (err < 0) + phy_error(phydev); + + queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, + PHY_STATE_TIME * HZ); +} + +void phy_mac_interrupt(struct phy_device *phydev, int new_link) +{ + cancel_work_sync(&phydev->phy_queue); + phydev->link = new_link; + schedule_work(&phydev->phy_queue); +} +EXPORT_SYMBOL(phy_mac_interrupt); + +static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad, + int addr) +{ + /* Write the desired MMD Devad */ + bus->write(bus, addr, MII_MMD_CTRL, devad); + + /* Write the desired MMD register address */ + bus->write(bus, addr, MII_MMD_DATA, prtad); + + /* Select the Function : DATA with no post increment */ + bus->write(bus, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR)); +} + +/** + * phy_read_mmd_indirect - reads data from the MMD registers + * @phydev: The PHY device bus + * @prtad: MMD Address + * @devad: MMD DEVAD + * @addr: PHY address on the MII bus + * + * Description: it reads data from the MMD registers (clause 22 to access to + * clause 45) of the specified phy address. + * To read these register we have: + * 1) Write reg 13 // DEVAD + * 2) Write reg 14 // MMD Address + * 3) Write reg 13 // MMD Data Command for MMD DEVAD + * 3) Read reg 14 // Read MMD data + */ +int phy_read_mmd_indirect(struct phy_device *phydev, int prtad, + int devad, int addr) +{ + struct phy_driver *phydrv = phydev->drv; + int value = -1; + + if (phydrv->read_mmd_indirect == NULL) { + mmd_phy_indirect(phydev->bus, prtad, devad, addr); + + /* Read the content of the MMD's selected register */ + value = phydev->bus->read(phydev->bus, addr, MII_MMD_DATA); + } else { + value = phydrv->read_mmd_indirect(phydev, prtad, devad, addr); + } + return value; +} +EXPORT_SYMBOL(phy_read_mmd_indirect); + +/** + * phy_write_mmd_indirect - writes data to the MMD registers + * @phydev: The PHY device + * @prtad: MMD Address + * @devad: MMD DEVAD + * @addr: PHY address on the MII bus + * @data: data to write in the MMD register + * + * Description: Write data from the MMD registers of the specified + * phy address. + * To write these register we have: + * 1) Write reg 13 // DEVAD + * 2) Write reg 14 // MMD Address + * 3) Write reg 13 // MMD Data Command for MMD DEVAD + * 3) Write reg 14 // Write MMD data + */ +void phy_write_mmd_indirect(struct phy_device *phydev, int prtad, + int devad, int addr, u32 data) +{ + struct phy_driver *phydrv = phydev->drv; + + if (phydrv->write_mmd_indirect == NULL) { + mmd_phy_indirect(phydev->bus, prtad, devad, addr); + + /* Write the data into MMD's selected register */ + phydev->bus->write(phydev->bus, addr, MII_MMD_DATA, data); + } else { + phydrv->write_mmd_indirect(phydev, prtad, devad, addr, data); + } +} +EXPORT_SYMBOL(phy_write_mmd_indirect); + +/** + * 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) +{ + /* According to 802.3az,the EEE is supported only in full duplex-mode. + * Also EEE feature is active when core is operating with MII, GMII + * or RGMII (all kinds). Internal PHYs are also allowed to proceed and + * should return an error if they do not support EEE. + */ + if ((phydev->duplex == DUPLEX_FULL) && + ((phydev->interface == PHY_INTERFACE_MODE_MII) || + (phydev->interface == PHY_INTERFACE_MODE_GMII) || + (phydev->interface >= PHY_INTERFACE_MODE_RGMII && + phydev->interface <= PHY_INTERFACE_MODE_RGMII_TXID) || + phy_is_internal(phydev))) { + 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_indirect(phydev, MDIO_PCS_EEE_ABLE, + MDIO_MMD_PCS, phydev->addr); + 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_indirect(phydev, MDIO_AN_EEE_LPABLE, + MDIO_MMD_AN, phydev->addr); + if (eee_lp <= 0) + goto eee_exit_err; + + eee_adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, + MDIO_MMD_AN, phydev->addr); + 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_indirect(phydev, MDIO_CTRL1, + MDIO_MMD_PCS, + phydev->addr); + if (val < 0) + return val; + + val |= MDIO_PCS_CTRL1_CLKSTOP_EN; + phy_write_mmd_indirect(phydev, MDIO_CTRL1, + MDIO_MMD_PCS, phydev->addr, + 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) +{ + return phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_WK_ERR, + MDIO_MMD_PCS, phydev->addr); +} +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; + + /* Get Supported EEE */ + val = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE, + MDIO_MMD_PCS, phydev->addr); + if (val < 0) + return val; + data->supported = mmd_eee_cap_to_ethtool_sup_t(val); + + /* Get advertisement EEE */ + val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, + MDIO_MMD_AN, phydev->addr); + if (val < 0) + return val; + data->advertised = mmd_eee_adv_to_ethtool_adv_t(val); + + /* Get LP advertisement EEE */ + val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE, + MDIO_MMD_AN, phydev->addr); + 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 val = ethtool_adv_to_mmd_eee_adv_t(data->advertised); + + phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, + phydev->addr, val); + + return 0; +} +EXPORT_SYMBOL(phy_ethtool_set_eee); + +int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) +{ + if (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->get_wol) + phydev->drv->get_wol(phydev, wol); +} +EXPORT_SYMBOL(phy_ethtool_get_wol); -- cgit v1.2.3