655 lines
17 KiB
C
655 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Clause 45 PHY support
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*/
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#include <linux/ethtool.h>
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#include <linux/export.h>
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#include <linux/mdio.h>
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#include <linux/mii.h>
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#include <linux/phy.h>
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/**
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* genphy_c45_pma_can_sleep - checks if the PMA have sleep support
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* @phydev: target phy_device struct
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*/
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static bool genphy_c45_pma_can_sleep(struct phy_device *phydev)
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{
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int stat1;
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stat1 = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_STAT1);
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if (stat1 < 0)
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return false;
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return !!(stat1 & MDIO_STAT1_LPOWERABLE);
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}
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/**
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* genphy_c45_pma_resume - wakes up the PMA module
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* @phydev: target phy_device struct
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*/
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int genphy_c45_pma_resume(struct phy_device *phydev)
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{
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if (!genphy_c45_pma_can_sleep(phydev))
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return -EOPNOTSUPP;
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return phy_clear_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1,
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MDIO_CTRL1_LPOWER);
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}
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EXPORT_SYMBOL_GPL(genphy_c45_pma_resume);
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/**
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* genphy_c45_pma_suspend - suspends the PMA module
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* @phydev: target phy_device struct
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*/
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int genphy_c45_pma_suspend(struct phy_device *phydev)
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{
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if (!genphy_c45_pma_can_sleep(phydev))
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return -EOPNOTSUPP;
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return phy_set_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1,
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MDIO_CTRL1_LPOWER);
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}
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EXPORT_SYMBOL_GPL(genphy_c45_pma_suspend);
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/**
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* genphy_c45_pma_setup_forced - configures a forced speed
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* @phydev: target phy_device struct
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*/
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int genphy_c45_pma_setup_forced(struct phy_device *phydev)
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{
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int ctrl1, ctrl2, ret;
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/* Half duplex is not supported */
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if (phydev->duplex != DUPLEX_FULL)
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return -EINVAL;
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ctrl1 = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1);
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if (ctrl1 < 0)
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return ctrl1;
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ctrl2 = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL2);
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if (ctrl2 < 0)
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return ctrl2;
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ctrl1 &= ~MDIO_CTRL1_SPEEDSEL;
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/*
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* PMA/PMD type selection is 1.7.5:0 not 1.7.3:0. See 45.2.1.6.1
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* in 802.3-2012 and 802.3-2015.
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*/
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ctrl2 &= ~(MDIO_PMA_CTRL2_TYPE | 0x30);
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switch (phydev->speed) {
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case SPEED_10:
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ctrl2 |= MDIO_PMA_CTRL2_10BT;
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break;
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case SPEED_100:
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ctrl1 |= MDIO_PMA_CTRL1_SPEED100;
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ctrl2 |= MDIO_PMA_CTRL2_100BTX;
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break;
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case SPEED_1000:
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ctrl1 |= MDIO_PMA_CTRL1_SPEED1000;
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/* Assume 1000base-T */
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ctrl2 |= MDIO_PMA_CTRL2_1000BT;
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break;
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case SPEED_2500:
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ctrl1 |= MDIO_CTRL1_SPEED2_5G;
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/* Assume 2.5Gbase-T */
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ctrl2 |= MDIO_PMA_CTRL2_2_5GBT;
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break;
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case SPEED_5000:
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ctrl1 |= MDIO_CTRL1_SPEED5G;
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/* Assume 5Gbase-T */
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ctrl2 |= MDIO_PMA_CTRL2_5GBT;
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break;
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case SPEED_10000:
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ctrl1 |= MDIO_CTRL1_SPEED10G;
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/* Assume 10Gbase-T */
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ctrl2 |= MDIO_PMA_CTRL2_10GBT;
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break;
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default:
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return -EINVAL;
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}
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ret = phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1, ctrl1);
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if (ret < 0)
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return ret;
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ret = phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL2, ctrl2);
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if (ret < 0)
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return ret;
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return genphy_c45_an_disable_aneg(phydev);
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}
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EXPORT_SYMBOL_GPL(genphy_c45_pma_setup_forced);
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/**
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* genphy_c45_an_config_aneg - configure advertisement registers
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* @phydev: target phy_device struct
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*
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* Configure advertisement registers based on modes set in phydev->advertising
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*
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* Returns negative errno code on failure, 0 if advertisement didn't change,
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* or 1 if advertised modes changed.
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*/
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int genphy_c45_an_config_aneg(struct phy_device *phydev)
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{
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int changed, ret;
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u32 adv;
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linkmode_and(phydev->advertising, phydev->advertising,
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phydev->supported);
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changed = genphy_config_eee_advert(phydev);
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adv = linkmode_adv_to_mii_adv_t(phydev->advertising);
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ret = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE,
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ADVERTISE_ALL | ADVERTISE_100BASE4 |
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ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM,
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adv);
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if (ret < 0)
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return ret;
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if (ret > 0)
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changed = 1;
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adv = linkmode_adv_to_mii_10gbt_adv_t(phydev->advertising);
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ret = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_10GBT_CTRL,
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MDIO_AN_10GBT_CTRL_ADV10G |
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MDIO_AN_10GBT_CTRL_ADV5G |
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MDIO_AN_10GBT_CTRL_ADV2_5G, adv);
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if (ret < 0)
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return ret;
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if (ret > 0)
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changed = 1;
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return changed;
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}
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EXPORT_SYMBOL_GPL(genphy_c45_an_config_aneg);
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/**
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* genphy_c45_an_disable_aneg - disable auto-negotiation
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* @phydev: target phy_device struct
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*
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* Disable auto-negotiation in the Clause 45 PHY. The link parameters
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* are controlled through the PMA/PMD MMD registers.
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*
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* Returns zero on success, negative errno code on failure.
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*/
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int genphy_c45_an_disable_aneg(struct phy_device *phydev)
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{
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return phy_clear_bits_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1,
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MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART);
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}
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EXPORT_SYMBOL_GPL(genphy_c45_an_disable_aneg);
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/**
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* genphy_c45_restart_aneg - Enable and restart auto-negotiation
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* @phydev: target phy_device struct
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*
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* This assumes that the auto-negotiation MMD is present.
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*
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* Enable and restart auto-negotiation.
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*/
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int genphy_c45_restart_aneg(struct phy_device *phydev)
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{
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return phy_set_bits_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1,
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MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART);
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}
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EXPORT_SYMBOL_GPL(genphy_c45_restart_aneg);
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/**
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* genphy_c45_check_and_restart_aneg - Enable and restart auto-negotiation
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* @phydev: target phy_device struct
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* @restart: whether aneg restart is requested
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*
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* This assumes that the auto-negotiation MMD is present.
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*
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* Check, and restart auto-negotiation if needed.
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*/
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int genphy_c45_check_and_restart_aneg(struct phy_device *phydev, bool restart)
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{
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int ret;
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if (!restart) {
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/* Configure and restart aneg if it wasn't set before */
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ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1);
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if (ret < 0)
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return ret;
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if (!(ret & MDIO_AN_CTRL1_ENABLE))
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restart = true;
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}
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if (restart)
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return genphy_c45_restart_aneg(phydev);
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return 0;
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}
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EXPORT_SYMBOL_GPL(genphy_c45_check_and_restart_aneg);
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/**
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* genphy_c45_aneg_done - return auto-negotiation complete status
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* @phydev: target phy_device struct
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*
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* This assumes that the auto-negotiation MMD is present.
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*
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* Reads the status register from the auto-negotiation MMD, returning:
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* - positive if auto-negotiation is complete
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* - negative errno code on error
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* - zero otherwise
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*/
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int genphy_c45_aneg_done(struct phy_device *phydev)
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{
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int val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
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return val < 0 ? val : val & MDIO_AN_STAT1_COMPLETE ? 1 : 0;
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}
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EXPORT_SYMBOL_GPL(genphy_c45_aneg_done);
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/**
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* genphy_c45_read_link - read the overall link status from the MMDs
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* @phydev: target phy_device struct
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*
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* Read the link status from the specified MMDs, and if they all indicate
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* that the link is up, set phydev->link to 1. If an error is encountered,
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* a negative errno will be returned, otherwise zero.
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*/
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int genphy_c45_read_link(struct phy_device *phydev)
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{
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u32 mmd_mask = MDIO_DEVS_PMAPMD;
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int val, devad;
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bool link = true;
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if (phydev->c45_ids.mmds_present & MDIO_DEVS_AN) {
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val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1);
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if (val < 0)
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return val;
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/* Autoneg is being started, therefore disregard current
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* link status and report link as down.
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*/
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if (val & MDIO_AN_CTRL1_RESTART) {
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phydev->link = 0;
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return 0;
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}
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}
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while (mmd_mask && link) {
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devad = __ffs(mmd_mask);
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mmd_mask &= ~BIT(devad);
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/* The link state is latched low so that momentary link
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* drops can be detected. Do not double-read the status
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* in polling mode to detect such short link drops except
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* the link was already down.
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*/
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if (!phy_polling_mode(phydev) || !phydev->link) {
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val = phy_read_mmd(phydev, devad, MDIO_STAT1);
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if (val < 0)
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return val;
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else if (val & MDIO_STAT1_LSTATUS)
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continue;
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}
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val = phy_read_mmd(phydev, devad, MDIO_STAT1);
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if (val < 0)
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return val;
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if (!(val & MDIO_STAT1_LSTATUS))
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link = false;
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}
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phydev->link = link;
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return 0;
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}
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EXPORT_SYMBOL_GPL(genphy_c45_read_link);
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/**
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* genphy_c45_read_lpa - read the link partner advertisement and pause
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* @phydev: target phy_device struct
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*
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* Read the Clause 45 defined base (7.19) and 10G (7.33) status registers,
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* filling in the link partner advertisement, pause and asym_pause members
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* in @phydev. This assumes that the auto-negotiation MMD is present, and
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* the backplane bit (7.48.0) is clear. Clause 45 PHY drivers are expected
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* to fill in the remainder of the link partner advert from vendor registers.
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*/
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int genphy_c45_read_lpa(struct phy_device *phydev)
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{
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int val;
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val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
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if (val < 0)
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return val;
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if (!(val & MDIO_AN_STAT1_COMPLETE)) {
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linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
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phydev->lp_advertising);
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mii_10gbt_stat_mod_linkmode_lpa_t(phydev->lp_advertising, 0);
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mii_adv_mod_linkmode_adv_t(phydev->lp_advertising, 0);
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phydev->pause = 0;
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phydev->asym_pause = 0;
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return 0;
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}
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linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->lp_advertising,
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val & MDIO_AN_STAT1_LPABLE);
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/* Read the link partner's base page advertisement */
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val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA);
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if (val < 0)
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return val;
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mii_adv_mod_linkmode_adv_t(phydev->lp_advertising, val);
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phydev->pause = val & LPA_PAUSE_CAP ? 1 : 0;
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phydev->asym_pause = val & LPA_PAUSE_ASYM ? 1 : 0;
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/* Read the link partner's 10G advertisement */
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val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_10GBT_STAT);
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if (val < 0)
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return val;
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mii_10gbt_stat_mod_linkmode_lpa_t(phydev->lp_advertising, val);
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return 0;
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}
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EXPORT_SYMBOL_GPL(genphy_c45_read_lpa);
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/**
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* genphy_c45_read_pma - read link speed etc from PMA
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* @phydev: target phy_device struct
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*/
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int genphy_c45_read_pma(struct phy_device *phydev)
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{
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int val;
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linkmode_zero(phydev->lp_advertising);
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val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1);
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if (val < 0)
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return val;
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switch (val & MDIO_CTRL1_SPEEDSEL) {
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case 0:
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phydev->speed = SPEED_10;
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break;
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case MDIO_PMA_CTRL1_SPEED100:
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phydev->speed = SPEED_100;
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break;
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case MDIO_PMA_CTRL1_SPEED1000:
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phydev->speed = SPEED_1000;
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break;
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case MDIO_CTRL1_SPEED2_5G:
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phydev->speed = SPEED_2500;
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break;
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case MDIO_CTRL1_SPEED5G:
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phydev->speed = SPEED_5000;
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break;
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case MDIO_CTRL1_SPEED10G:
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phydev->speed = SPEED_10000;
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break;
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default:
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phydev->speed = SPEED_UNKNOWN;
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break;
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}
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phydev->duplex = DUPLEX_FULL;
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return 0;
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}
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EXPORT_SYMBOL_GPL(genphy_c45_read_pma);
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/**
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* genphy_c45_read_mdix - read mdix status from PMA
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* @phydev: target phy_device struct
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*/
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int genphy_c45_read_mdix(struct phy_device *phydev)
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{
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int val;
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if (phydev->speed == SPEED_10000) {
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val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD,
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MDIO_PMA_10GBT_SWAPPOL);
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if (val < 0)
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return val;
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switch (val) {
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case MDIO_PMA_10GBT_SWAPPOL_ABNX | MDIO_PMA_10GBT_SWAPPOL_CDNX:
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phydev->mdix = ETH_TP_MDI;
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break;
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case 0:
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phydev->mdix = ETH_TP_MDI_X;
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break;
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default:
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phydev->mdix = ETH_TP_MDI_INVALID;
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break;
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}
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(genphy_c45_read_mdix);
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/**
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* genphy_c45_pma_read_abilities - read supported link modes from PMA
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* @phydev: target phy_device struct
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*
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* Read the supported link modes from the PMA Status 2 (1.8) register. If bit
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* 1.8.9 is set, the list of supported modes is build using the values in the
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* PMA Extended Abilities (1.11) register, indicating 1000BASET an 10G related
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* modes. If bit 1.11.14 is set, then the list is also extended with the modes
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* in the 2.5G/5G PMA Extended register (1.21), indicating if 2.5GBASET and
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* 5GBASET are supported.
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*/
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int genphy_c45_pma_read_abilities(struct phy_device *phydev)
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{
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int val;
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linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported);
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if (phydev->c45_ids.mmds_present & MDIO_DEVS_AN) {
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val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
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if (val < 0)
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return val;
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if (val & MDIO_AN_STAT1_ABLE)
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linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
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phydev->supported);
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}
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val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_STAT2);
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if (val < 0)
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return val;
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linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT,
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phydev->supported,
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val & MDIO_PMA_STAT2_10GBSR);
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linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT,
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phydev->supported,
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val & MDIO_PMA_STAT2_10GBLR);
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linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT,
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phydev->supported,
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val & MDIO_PMA_STAT2_10GBER);
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if (val & MDIO_PMA_STAT2_EXTABLE) {
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val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_EXTABLE);
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if (val < 0)
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return val;
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linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT,
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phydev->supported,
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val & MDIO_PMA_EXTABLE_10GBLRM);
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linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
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phydev->supported,
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val & MDIO_PMA_EXTABLE_10GBT);
|
|
linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
|
|
phydev->supported,
|
|
val & MDIO_PMA_EXTABLE_10GBKX4);
|
|
linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
|
|
phydev->supported,
|
|
val & MDIO_PMA_EXTABLE_10GBKR);
|
|
linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
|
|
phydev->supported,
|
|
val & MDIO_PMA_EXTABLE_1000BT);
|
|
linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
|
|
phydev->supported,
|
|
val & MDIO_PMA_EXTABLE_1000BKX);
|
|
|
|
linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
|
|
phydev->supported,
|
|
val & MDIO_PMA_EXTABLE_100BTX);
|
|
linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT,
|
|
phydev->supported,
|
|
val & MDIO_PMA_EXTABLE_100BTX);
|
|
|
|
linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT,
|
|
phydev->supported,
|
|
val & MDIO_PMA_EXTABLE_10BT);
|
|
linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT,
|
|
phydev->supported,
|
|
val & MDIO_PMA_EXTABLE_10BT);
|
|
|
|
if (val & MDIO_PMA_EXTABLE_NBT) {
|
|
val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD,
|
|
MDIO_PMA_NG_EXTABLE);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
|
|
phydev->supported,
|
|
val & MDIO_PMA_NG_EXTABLE_2_5GBT);
|
|
|
|
linkmode_mod_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT,
|
|
phydev->supported,
|
|
val & MDIO_PMA_NG_EXTABLE_5GBT);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(genphy_c45_pma_read_abilities);
|
|
|
|
/**
|
|
* genphy_c45_read_status - read PHY status
|
|
* @phydev: target phy_device struct
|
|
*
|
|
* Reads status from PHY and sets phy_device members accordingly.
|
|
*/
|
|
int genphy_c45_read_status(struct phy_device *phydev)
|
|
{
|
|
int ret;
|
|
|
|
ret = genphy_c45_read_link(phydev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
phydev->speed = SPEED_UNKNOWN;
|
|
phydev->duplex = DUPLEX_UNKNOWN;
|
|
phydev->pause = 0;
|
|
phydev->asym_pause = 0;
|
|
|
|
if (phydev->autoneg == AUTONEG_ENABLE) {
|
|
ret = genphy_c45_read_lpa(phydev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
phy_resolve_aneg_linkmode(phydev);
|
|
} else {
|
|
ret = genphy_c45_read_pma(phydev);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(genphy_c45_read_status);
|
|
|
|
/**
|
|
* genphy_c45_config_aneg - restart auto-negotiation or forced setup
|
|
* @phydev: target phy_device struct
|
|
*
|
|
* Description: If auto-negotiation is enabled, we configure the
|
|
* advertising, and then restart auto-negotiation. If it is not
|
|
* enabled, then we force a configuration.
|
|
*/
|
|
int genphy_c45_config_aneg(struct phy_device *phydev)
|
|
{
|
|
bool changed = false;
|
|
int ret;
|
|
|
|
if (phydev->autoneg == AUTONEG_DISABLE)
|
|
return genphy_c45_pma_setup_forced(phydev);
|
|
|
|
ret = genphy_c45_an_config_aneg(phydev);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret > 0)
|
|
changed = true;
|
|
|
|
return genphy_c45_check_and_restart_aneg(phydev, changed);
|
|
}
|
|
EXPORT_SYMBOL_GPL(genphy_c45_config_aneg);
|
|
|
|
/* The gen10g_* functions are the old Clause 45 stub */
|
|
|
|
int gen10g_config_aneg(struct phy_device *phydev)
|
|
{
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(gen10g_config_aneg);
|
|
|
|
int genphy_c45_loopback(struct phy_device *phydev, bool enable)
|
|
{
|
|
return phy_modify_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
|
|
MDIO_PCS_CTRL1_LOOPBACK,
|
|
enable ? MDIO_PCS_CTRL1_LOOPBACK : 0);
|
|
}
|
|
EXPORT_SYMBOL_GPL(genphy_c45_loopback);
|
|
|
|
/**
|
|
* genphy_c45_fast_retrain - configure fast retrain registers
|
|
* @phydev: target phy_device struct
|
|
* @enable: enable fast retrain or not
|
|
*
|
|
* Description: If fast-retrain is enabled, we configure PHY as
|
|
* advertising fast retrain capable and THP Bypass Request, then
|
|
* enable fast retrain. If it is not enabled, we configure fast
|
|
* retrain disabled.
|
|
*/
|
|
int genphy_c45_fast_retrain(struct phy_device *phydev, bool enable)
|
|
{
|
|
int ret;
|
|
|
|
if (!enable)
|
|
return phy_clear_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_FSRT_CSR,
|
|
MDIO_PMA_10GBR_FSRT_ENABLE);
|
|
|
|
if (linkmode_test_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, phydev->supported)) {
|
|
ret = phy_set_bits_mmd(phydev, MDIO_MMD_AN, MDIO_AN_10GBT_CTRL,
|
|
MDIO_AN_10GBT_CTRL_ADVFSRT2_5G);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = phy_set_bits_mmd(phydev, MDIO_MMD_AN, MDIO_AN_CTRL2,
|
|
MDIO_AN_THP_BP2_5GT);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return phy_set_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_FSRT_CSR,
|
|
MDIO_PMA_10GBR_FSRT_ENABLE);
|
|
}
|
|
EXPORT_SYMBOL_GPL(genphy_c45_fast_retrain);
|
|
|
|
struct phy_driver genphy_c45_driver = {
|
|
.phy_id = 0xffffffff,
|
|
.phy_id_mask = 0xffffffff,
|
|
.name = "Generic Clause 45 PHY",
|
|
.read_status = genphy_c45_read_status,
|
|
};
|