| // SPDX-License-Identifier: GPL-2.0+ |
| /* 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 |
| */ |
| |
| #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/phy_led_triggers.h> |
| #include <linux/workqueue.h> |
| #include <linux/mdio.h> |
| #include <linux/io.h> |
| #include <linux/uaccess.h> |
| #include <linux/atomic.h> |
| |
| #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(READY) |
| PHY_STATE_STR(UP) |
| PHY_STATE_STR(RUNNING) |
| PHY_STATE_STR(NOLINK) |
| PHY_STATE_STR(FORCING) |
| PHY_STATE_STR(HALTED) |
| PHY_STATE_STR(RESUMING) |
| } |
| |
| return NULL; |
| } |
| |
| 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_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, bool interrupts) |
| { |
| phydev->interrupts = interrupts ? 1 : 0; |
| 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); |
| else if (phydev->is_c45) |
| return genphy_c45_aneg_done(phydev); |
| else |
| 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, unsigned long *supported) |
| { |
| return phy_lookup_setting(speed, duplex, supported, 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) |
| { |
| return phy_speeds(speeds, size, phy->supported); |
| } |
| |
| /** |
| * 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, |
| unsigned long *features) |
| { |
| return !!phy_lookup_setting(speed, duplex, features, 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; |
| |
| /* Sanitize settings based on PHY capabilities */ |
| if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported)) |
| phydev->autoneg = AUTONEG_DISABLE; |
| |
| setting = phy_find_valid(phydev->speed, phydev->duplex, |
| phydev->supported); |
| 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) |
| { |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising); |
| 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 */ |
| ethtool_convert_legacy_u32_to_link_mode(advertising, cmd->advertising); |
| linkmode_and(advertising, 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; |
| |
| linkmode_copy(phydev->advertising, advertising); |
| |
| if (AUTONEG_ENABLE == cmd->autoneg) |
| linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, |
| phydev->advertising); |
| else |
| linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, |
| phydev->advertising); |
| |
| 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) |
| { |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising); |
| u8 autoneg = cmd->base.autoneg; |
| u8 duplex = cmd->base.duplex; |
| u32 speed = cmd->base.speed; |
| |
| if (cmd->base.phy_address != phydev->mdio.addr) |
| return -EINVAL; |
| |
| linkmode_copy(advertising, cmd->link_modes.advertising); |
| |
| /* We make sure that we don't pass unsupported values in to the PHY */ |
| linkmode_and(advertising, advertising, phydev->supported); |
| |
| /* Verify the settings we care about. */ |
| if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE) |
| return -EINVAL; |
| |
| if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising)) |
| 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; |
| |
| linkmode_copy(phydev->advertising, advertising); |
| |
| if (autoneg == AUTONEG_ENABLE) |
| linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, |
| phydev->advertising); |
| else |
| linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, |
| phydev->advertising); |
| |
| 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) |
| { |
| linkmode_copy(cmd->link_modes.supported, phydev->supported); |
| linkmode_copy(cmd->link_modes.advertising, phydev->advertising); |
| linkmode_copy(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: |
| mii_adv_mod_linkmode_adv_t(phydev->advertising, |
| 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 void phy_queue_state_machine(struct phy_device *phydev, |
| unsigned int secs) |
| { |
| mod_delayed_work(system_power_efficient_wq, &phydev->state_queue, |
| secs * HZ); |
| } |
| |
| static void phy_trigger_machine(struct phy_device *phydev) |
| { |
| phy_queue_state_machine(phydev, 0); |
| } |
| |
| static int phy_config_aneg(struct phy_device *phydev) |
| { |
| if (phydev->drv->config_aneg) |
| return phydev->drv->config_aneg(phydev); |
| |
| /* Clause 45 PHYs that don't implement Clause 22 registers are not |
| * allowed to call genphy_config_aneg() |
| */ |
| if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0))) |
| return -EOPNOTSUPP; |
| |
| return genphy_config_aneg(phydev); |
| } |
| |
| /** |
| * phy_check_link_status - check link status and set state accordingly |
| * @phydev: the phy_device struct |
| * |
| * Description: Check for link and whether autoneg was triggered / is running |
| * and set state accordingly |
| */ |
| static int phy_check_link_status(struct phy_device *phydev) |
| { |
| int err; |
| |
| WARN_ON(!mutex_is_locked(&phydev->lock)); |
| |
| err = phy_read_status(phydev); |
| if (err) |
| return err; |
| |
| if (phydev->link && phydev->state != PHY_RUNNING) { |
| phydev->state = PHY_RUNNING; |
| phy_link_up(phydev); |
| } else if (!phydev->link && phydev->state != PHY_NOLINK) { |
| phydev->state = PHY_NOLINK; |
| phy_link_down(phydev, true); |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * 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; |
| |
| if (!phydev->drv) |
| return -EIO; |
| |
| mutex_lock(&phydev->lock); |
| |
| if (AUTONEG_DISABLE == phydev->autoneg) |
| phy_sanitize_settings(phydev); |
| |
| /* Invalidate LP advertising flags */ |
| linkmode_zero(phydev->lp_advertising); |
| |
| err = phy_config_aneg(phydev); |
| if (err < 0) |
| goto out_unlock; |
| |
| if (phy_is_started(phydev)) { |
| if (phydev->autoneg == AUTONEG_ENABLE) { |
| err = phy_check_link_status(phydev); |
| } else { |
| phydev->state = PHY_FORCING; |
| phydev->link_timeout = PHY_FORCE_TIMEOUT; |
| } |
| } |
| |
| out_unlock: |
| mutex_unlock(&phydev->lock); |
| |
| return err; |
| } |
| 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) |
| { |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_old); |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(adv); |
| int ret; |
| |
| if (phydev->autoneg != AUTONEG_ENABLE) |
| return 0; |
| |
| linkmode_copy(adv_old, phydev->advertising); |
| linkmode_copy(adv, phydev->lp_advertising); |
| linkmode_and(adv, adv, phydev->supported); |
| |
| if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, adv) || |
| linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, adv)) { |
| linkmode_clear_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, |
| phydev->advertising); |
| linkmode_clear_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, |
| phydev->advertising); |
| linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, |
| phydev->advertising); |
| linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, |
| phydev->advertising); |
| } else if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, |
| adv) || |
| linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, |
| adv)) { |
| linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, |
| phydev->advertising); |
| linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, |
| phydev->advertising); |
| } |
| |
| if (linkmode_equal(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) |
| { |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(all_speeds) = { 0, }; |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(not_speeds); |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_old); |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(speeds); |
| |
| linkmode_copy(adv_old, phydev->advertising); |
| |
| if (phydev->autoneg != AUTONEG_ENABLE) |
| return 0; |
| |
| linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, all_speeds); |
| linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, all_speeds); |
| linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, all_speeds); |
| linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, all_speeds); |
| linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, all_speeds); |
| linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, all_speeds); |
| |
| linkmode_andnot(not_speeds, adv_old, all_speeds); |
| linkmode_copy(supported, phydev->supported); |
| linkmode_and(speeds, supported, all_speeds); |
| linkmode_or(phydev->advertising, not_speeds, speeds); |
| |
| if (linkmode_equal(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) |
| { |
| phy_trigger_machine(phydev); |
| } |
| EXPORT_SYMBOL_GPL(phy_start_machine); |
| |
| /** |
| * 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 (phy_is_started(phydev)) |
| 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) |
| { |
| WARN_ON(1); |
| |
| mutex_lock(&phydev->lock); |
| phydev->state = PHY_HALTED; |
| mutex_unlock(&phydev->lock); |
| |
| phy_trigger_machine(phydev); |
| } |
| |
| /** |
| * 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_interrupt - PHY interrupt handler |
| * @irq: interrupt line |
| * @phy_dat: phy_device pointer |
| * |
| * Description: Handle PHY interrupt |
| */ |
| static irqreturn_t phy_interrupt(int irq, void *phy_dat) |
| { |
| struct phy_device *phydev = phy_dat; |
| |
| if (phydev->drv->did_interrupt && !phydev->drv->did_interrupt(phydev)) |
| return IRQ_NONE; |
| |
| /* reschedule state queue work to run as soon as possible */ |
| phy_trigger_machine(phydev); |
| |
| if (phy_clear_interrupt(phydev)) |
| goto phy_err; |
| return IRQ_HANDLED; |
| |
| phy_err: |
| phy_error(phydev); |
| return IRQ_NONE; |
| } |
| |
| /** |
| * 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_request_interrupt - request interrupt 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. |
| * This should only be called with a valid IRQ number. |
| */ |
| void phy_request_interrupt(struct phy_device *phydev) |
| { |
| int err; |
| |
| err = request_threaded_irq(phydev->irq, NULL, phy_interrupt, |
| IRQF_ONESHOT | IRQF_SHARED, |
| phydev_name(phydev), phydev); |
| if (err) { |
| phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n", |
| err, phydev->irq); |
| phydev->irq = PHY_POLL; |
| } |
| } |
| EXPORT_SYMBOL(phy_request_interrupt); |
| |
| /** |
| * phy_stop - Bring down the PHY link, and stop checking the status |
| * @phydev: target phy_device struct |
| */ |
| void phy_stop(struct phy_device *phydev) |
| { |
| if (!phy_is_started(phydev)) { |
| WARN(1, "called from state %s\n", |
| phy_state_to_str(phydev->state)); |
| return; |
| } |
| |
| mutex_lock(&phydev->lock); |
| |
| if (phy_interrupt_is_valid(phydev)) |
| phy_disable_interrupts(phydev); |
| |
| phydev->state = PHY_HALTED; |
| |
| mutex_unlock(&phydev->lock); |
| |
| phy_state_machine(&phydev->state_queue.work); |
| phy_stop_machine(phydev); |
| |
| /* Cannot call flush_scheduled_work() here as desired because |
| * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler |
| * 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; |
| |
| mutex_lock(&phydev->lock); |
| |
| if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) { |
| WARN(1, "called from state %s\n", |
| phy_state_to_str(phydev->state)); |
| goto out; |
| } |
| |
| /* if phy was suspended, bring the physical link up again */ |
| __phy_resume(phydev); |
| |
| /* make sure interrupts are enabled for the PHY */ |
| if (phy_interrupt_is_valid(phydev)) { |
| err = phy_enable_interrupts(phydev); |
| if (err < 0) |
| goto out; |
| } |
| |
| if (phydev->state == PHY_READY) |
| phydev->state = PHY_UP; |
| else |
| phydev->state = PHY_RESUMING; |
| |
| phy_start_machine(phydev); |
| out: |
| mutex_unlock(&phydev->lock); |
| } |
| 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; |
| |
| 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_READY: |
| break; |
| case PHY_UP: |
| needs_aneg = true; |
| |
| break; |
| case PHY_NOLINK: |
| case PHY_RUNNING: |
| case PHY_RESUMING: |
| err = phy_check_link_status(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_HALTED: |
| if (phydev->link) { |
| phydev->link = 0; |
| phy_link_down(phydev, true); |
| do_suspend = true; |
| } |
| 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); |
| |
| 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(). |
| * |
| * In state PHY_HALTED the PHY gets suspended, so rescheduling the |
| * state machine would be pointless and possibly error prone when |
| * called from phy_disconnect() synchronously. |
| */ |
| mutex_lock(&phydev->lock); |
| if (phy_polling_mode(phydev) && phy_is_started(phydev)) |
| phy_queue_state_machine(phydev, PHY_STATE_TIME); |
| mutex_unlock(&phydev->lock); |
| } |
| |
| /** |
| * 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 */ |
| phy_trigger_machine(phydev); |
| } |
| EXPORT_SYMBOL(phy_mac_interrupt); |
| |
| static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv) |
| { |
| linkmode_zero(advertising); |
| |
| if (eee_adv & MDIO_EEE_100TX) |
| linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, |
| advertising); |
| if (eee_adv & MDIO_EEE_1000T) |
| linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, |
| advertising); |
| if (eee_adv & MDIO_EEE_10GT) |
| linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, |
| advertising); |
| if (eee_adv & MDIO_EEE_1000KX) |
| linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, |
| advertising); |
| if (eee_adv & MDIO_EEE_10GKX4) |
| linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, |
| advertising); |
| if (eee_adv & MDIO_EEE_10GKR) |
| linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, |
| advertising); |
| } |
| |
| /** |
| * 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) { |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(common); |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(lp); |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(adv); |
| int eee_lp, eee_cap, eee_adv; |
| int status; |
| u32 cap; |
| |
| /* 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; |
| |
| mmd_eee_adv_to_linkmode(adv, eee_adv); |
| mmd_eee_adv_to_linkmode(lp, eee_lp); |
| linkmode_and(common, adv, lp); |
| |
| if (!phy_check_valid(phydev->speed, phydev->duplex, common)) |
| goto eee_exit_err; |
| |
| if (clk_stop_enable) |
| /* Configure the PHY to stop receiving xMII |
| * clock while it is signaling LPI. |
| */ |
| phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, |
| MDIO_PCS_CTRL1_CLKSTOP_EN); |
| |
| 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); |
| data->eee_enabled = !!data->advertised; |
| |
| /* 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); |
| |
| data->eee_active = !!(data->advertised & data->lp_advertised); |
| |
| 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 = 0, 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; |
| |
| if (data->eee_enabled) { |
| adv = !data->advertised ? cap : |
| 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); |