ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/net/phy/phy.c b/marvell/linux/drivers/net/phy/phy.c
new file mode 100644
index 0000000..e223f0d
--- /dev/null
+++ b/marvell/linux/drivers/net/phy/phy.c
@@ -0,0 +1,1291 @@
+// 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/sfp.h>
+#include <linux/workqueue.h>
+#include <linux/mdio.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/atomic.h>
+
+#define PHY_STATE_TIME HZ
+
+#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(HALTED)
+ }
+
+ 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);
+}
+
+static const char *phy_pause_str(struct phy_device *phydev)
+{
+ bool local_pause, local_asym_pause;
+
+ if (phydev->autoneg == AUTONEG_DISABLE)
+ goto no_pause;
+
+ local_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+ phydev->advertising);
+ local_asym_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+ phydev->advertising);
+
+ if (local_pause && phydev->pause)
+ return "rx/tx";
+
+ if (local_asym_pause && phydev->asym_pause) {
+ if (local_pause)
+ return "rx";
+ if (phydev->pause)
+ return "tx";
+ }
+
+no_pause:
+ return "off";
+}
+
+/**
+ * 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),
+ phy_pause_str(phydev));
+ } 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)
+{
+ int ret = 0;
+
+ if (phydev->drv->ack_interrupt) {
+ mutex_lock(&phydev->lock);
+ ret = phydev->drv->ack_interrupt(phydev);
+ mutex_unlock(&phydev->lock);
+ }
+
+ return ret;
+}
+
+/**
+ * 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;
+
+ 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);
+
+ linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
+ phydev->advertising, AUTONEG_ENABLE == cmd->autoneg);
+
+ phydev->duplex = cmd->duplex;
+
+ phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl;
+
+ /* Restart the PHY */
+ phy_start_aneg(phydev);
+
+ return 0;
+}
+EXPORT_SYMBOL(phy_ethtool_sset);
+
+int phy_ethtool_ksettings_set(struct phy_device *phydev,
+ const struct ethtool_link_ksettings *cmd)
+{
+ __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;
+
+ if (autoneg == AUTONEG_DISABLE) {
+ phydev->speed = speed;
+ phydev->duplex = duplex;
+ }
+
+ linkmode_copy(phydev->advertising, advertising);
+
+ linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
+ phydev->advertising, autoneg == AUTONEG_ENABLE);
+
+ 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)
+{
+ mutex_lock(&phydev->lock);
+ 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;
+ mutex_unlock(&phydev->lock);
+}
+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;
+ int prtad, devad;
+
+ switch (cmd) {
+ case SIOCGMIIPHY:
+ mii_data->phy_id = phydev->mdio.addr;
+ /* fall through */
+
+ case SIOCGMIIREG:
+ if (mdio_phy_id_is_c45(mii_data->phy_id)) {
+ prtad = mdio_phy_id_prtad(mii_data->phy_id);
+ devad = mdio_phy_id_devad(mii_data->phy_id);
+ devad = MII_ADDR_C45 | devad << 16 | mii_data->reg_num;
+ } else {
+ prtad = mii_data->phy_id;
+ devad = mii_data->reg_num;
+ }
+ mii_data->val_out = mdiobus_read(phydev->mdio.bus, prtad,
+ devad);
+ return 0;
+
+ case SIOCSMIIREG:
+ if (mdio_phy_id_is_c45(mii_data->phy_id)) {
+ prtad = mdio_phy_id_prtad(mii_data->phy_id);
+ devad = mdio_phy_id_devad(mii_data->phy_id);
+ devad = MII_ADDR_C45 | devad << 16 | mii_data->reg_num;
+ } else {
+ prtad = mii_data->phy_id;
+ devad = mii_data->reg_num;
+ }
+ if (prtad == phydev->mdio.addr) {
+ switch (devad) {
+ 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;
+ case MII_CTRL1000:
+ mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
+ val);
+ change_autoneg = true;
+ break;
+ default:
+ /* do nothing */
+ break;
+ }
+ }
+
+ mdiobus_write(phydev->mdio.bus, prtad, devad, val);
+
+ if (prtad == phydev->mdio.addr &&
+ devad == 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);
+
+void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
+{
+ mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
+ jiffies);
+}
+EXPORT_SYMBOL(phy_queue_state_machine);
+
+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 genphy_c45_config_aneg(phydev);
+
+ 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));
+
+ /* Keep previous state if loopback is enabled because some PHYs
+ * report that Link is Down when loopback is enabled.
+ */
+ if (phydev->loopback_enabled)
+ return 0;
+
+ 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.
+ */
+static int _phy_start_aneg(struct phy_device *phydev)
+{
+ int err;
+
+ lockdep_assert_held(&phydev->lock);
+
+ if (!phydev->drv)
+ return -EIO;
+
+ if (AUTONEG_DISABLE == phydev->autoneg)
+ phy_sanitize_settings(phydev);
+
+ err = phy_config_aneg(phydev);
+ if (err < 0)
+ return err;
+
+ if (phy_is_started(phydev))
+ err = phy_check_link_status(phydev);
+
+ return err;
+}
+
+/**
+ * phy_start_aneg - start auto-negotiation for this PHY device
+ * @phydev: the phy_device struct
+ *
+ * Description: Sanitizes the settings (if we're not autonegotiating
+ * them), and then calls the driver's config_aneg function.
+ * If the PHYCONTROL Layer is operating, we change the state to
+ * reflect the beginning of Auto-negotiation or forcing.
+ */
+int phy_start_aneg(struct phy_device *phydev)
+{
+ int err;
+
+ mutex_lock(&phydev->lock);
+ err = _phy_start_aneg(phydev);
+ 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_tmp);
+ int ret;
+
+ if (phydev->autoneg != AUTONEG_ENABLE)
+ return 0;
+
+ linkmode_copy(adv_tmp, phydev->advertising);
+
+ ret = phy_speed_down_core(phydev);
+ if (ret)
+ return ret;
+
+ linkmode_copy(phydev->adv_old, adv_tmp);
+
+ if (linkmode_equal(phydev->advertising, adv_tmp))
+ 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(adv_tmp);
+
+ if (phydev->autoneg != AUTONEG_ENABLE)
+ return 0;
+
+ if (linkmode_empty(phydev->adv_old))
+ return 0;
+
+ linkmode_copy(adv_tmp, phydev->advertising);
+ linkmode_copy(phydev->advertising, phydev->adv_old);
+ linkmode_zero(phydev->adv_old);
+
+ if (linkmode_equal(phydev->advertising, adv_tmp))
+ 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_did_interrupt - Checks if the PHY generated an interrupt
+ * @phydev: target phy_device struct
+ */
+static int phy_did_interrupt(struct phy_device *phydev)
+{
+ int ret;
+
+ mutex_lock(&phydev->lock);
+ ret = phydev->drv->did_interrupt(phydev);
+ mutex_unlock(&phydev->lock);
+
+ return ret;
+}
+
+/**
+ * phy_handle_interrupt - PHY specific interrupt handler
+ * @phydev: target phy_device struct
+ */
+static int phy_handle_interrupt(struct phy_device *phydev)
+{
+ int ret;
+
+ mutex_lock(&phydev->lock);
+ ret = phydev->drv->handle_interrupt(phydev);
+ mutex_unlock(&phydev->lock);
+
+ return ret;
+}
+
+/**
+ * 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 && !phy_did_interrupt(phydev))
+ return IRQ_NONE;
+
+ if (phydev->drv->handle_interrupt) {
+ if (phy_handle_interrupt(phydev))
+ goto phy_err;
+ } else {
+ /* reschedule state queue work to run as soon as possible */
+ phy_trigger_machine(phydev);
+ }
+
+ /* did_interrupt() may have cleared the interrupt already */
+ if (!phydev->drv->did_interrupt && 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 and enable interrupt for a PHY device
+ * @phydev: target phy_device struct
+ *
+ * Description: Request and enable 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;
+ } else {
+ if (phy_enable_interrupts(phydev)) {
+ phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
+ phy_free_interrupt(phydev);
+ phydev->irq = PHY_POLL;
+ }
+ }
+}
+EXPORT_SYMBOL(phy_request_interrupt);
+
+/**
+ * phy_free_interrupt - disable and free interrupt for a PHY device
+ * @phydev: target phy_device struct
+ *
+ * Description: Disable and free the interrupt for the given PHY.
+ * This should only be called with a valid IRQ number.
+ */
+void phy_free_interrupt(struct phy_device *phydev)
+{
+ phy_disable_interrupts(phydev);
+ free_irq(phydev->irq, phydev);
+}
+EXPORT_SYMBOL(phy_free_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) && phydev->state != PHY_DOWN) {
+ WARN(1, "called from state %s\n",
+ phy_state_to_str(phydev->state));
+ return;
+ }
+
+ mutex_lock(&phydev->lock);
+
+ if (phydev->sfp_bus)
+ sfp_upstream_stop(phydev->sfp_bus);
+
+ 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)
+{
+ 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);
+
+ phydev->state = PHY_UP;
+
+ 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->sfp_bus)
+ sfp_upstream_start(phydev->sfp_bus);
+
+ switch (phydev->state) {
+ case PHY_DOWN:
+ case PHY_READY:
+ break;
+ case PHY_UP:
+ needs_aneg = true;
+
+ break;
+ case PHY_NOLINK:
+ case PHY_RUNNING:
+ err = phy_check_link_status(phydev);
+ 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));
+ if (phydev->drv && phydev->drv->link_change_notify)
+ phydev->drv->link_change_notify(phydev);
+ }
+
+ /* 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.
+ */
+ if (phydev->autoneg == AUTONEG_ENABLE) {
+ 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);