| /* 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 <linux/kernel.h> |
| #include <linux/string.h> |
| #include <linux/errno.h> |
| #include <linux/unistd.h> |
| #include <linux/interrupt.h> |
| #include <linux/delay.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/skbuff.h> |
| #include <linux/mm.h> |
| #include <linux/module.h> |
| #include <linux/mii.h> |
| #include <linux/ethtool.h> |
| #include <linux/phy.h> |
| #include <linux/timer.h> |
| #include <linux/workqueue.h> |
| #include <linux/mdio.h> |
| #include <linux/io.h> |
| #include <linux/uaccess.h> |
| #include <linux/atomic.h> |
| |
| #include <asm/irq.h> |
| |
| 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)"; |
| } |
| } |
| |
| #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), |
| 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; |
| |
| phydev->mdix = cmd->eth_tp_mdix_ctrl; |
| |
| /* 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; |
| cmd->eth_tp_mdix_ctrl = phydev->mdix; |
| |
| 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; |
| enum phy_state old_state; |
| int err = 0; |
| int old_link; |
| |
| mutex_lock(&phydev->lock); |
| |
| old_state = phydev->state; |
| |
| 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: |
| if (phy_interrupt_is_valid(phydev)) |
| 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; |
| 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 and link changed since latest checking. |
| */ |
| if (!phy_interrupt_is_valid(phydev)) { |
| old_link = phydev->link; |
| err = phy_read_status(phydev); |
| if (err) |
| break; |
| |
| if (old_link != phydev->link) |
| 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); |
| |
| dev_dbg(&phydev->dev, "PHY state change %s -> %s\n", |
| phy_state_to_str(old_state), phy_state_to_str(phydev->state)); |
| |
| 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) { |
| struct mii_bus *bus = phydev->bus; |
| |
| mutex_lock(&bus->mdio_lock); |
| mmd_phy_indirect(bus, prtad, devad, addr); |
| |
| /* Read the content of the MMD's selected register */ |
| value = bus->read(bus, addr, MII_MMD_DATA); |
| mutex_unlock(&bus->mdio_lock); |
| } 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) { |
| struct mii_bus *bus = phydev->bus; |
| |
| mutex_lock(&bus->mdio_lock); |
| mmd_phy_indirect(bus, prtad, devad, addr); |
| |
| /* Write the data into MMD's selected register */ |
| bus->write(bus, addr, MII_MMD_DATA, data); |
| mutex_unlock(&bus->mdio_lock); |
| } 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) || |
| phy_interface_is_rgmii(phydev) || |
| 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); |