/* * Clause 45 PHY support */ #include #include #include #include #include /** * genphy_c45_setup_forced - configures a forced speed * @phydev: target phy_device struct */ int genphy_c45_pma_setup_forced(struct phy_device *phydev) { int ctrl1, ctrl2, ret; /* Half duplex is not supported */ if (phydev->duplex != DUPLEX_FULL) return -EINVAL; ctrl1 = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1); if (ctrl1 < 0) return ctrl1; ctrl2 = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL2); if (ctrl2 < 0) return ctrl2; ctrl1 &= ~MDIO_CTRL1_SPEEDSEL; /* * PMA/PMD type selection is 1.7.5:0 not 1.7.3:0. See 45.2.1.6.1 * in 802.3-2012 and 802.3-2015. */ ctrl2 &= ~(MDIO_PMA_CTRL2_TYPE | 0x30); switch (phydev->speed) { case SPEED_10: ctrl2 |= MDIO_PMA_CTRL2_10BT; break; case SPEED_100: ctrl1 |= MDIO_PMA_CTRL1_SPEED100; ctrl2 |= MDIO_PMA_CTRL2_100BTX; break; case SPEED_1000: ctrl1 |= MDIO_PMA_CTRL1_SPEED1000; /* Assume 1000base-T */ ctrl2 |= MDIO_PMA_CTRL2_1000BT; break; case SPEED_10000: ctrl1 |= MDIO_CTRL1_SPEED10G; /* Assume 10Gbase-T */ ctrl2 |= MDIO_PMA_CTRL2_10GBT; break; default: return -EINVAL; } ret = phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1, ctrl1); if (ret < 0) return ret; return phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL2, ctrl2); } EXPORT_SYMBOL_GPL(genphy_c45_pma_setup_forced); /** * genphy_c45_an_disable_aneg - disable auto-negotiation * @phydev: target phy_device struct * * Disable auto-negotiation in the Clause 45 PHY. The link parameters * parameters are controlled through the PMA/PMD MMD registers. * * Returns zero on success, negative errno code on failure. */ int genphy_c45_an_disable_aneg(struct phy_device *phydev) { int val; val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1); if (val < 0) return val; val &= ~(MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART); return phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1, val); } EXPORT_SYMBOL_GPL(genphy_c45_an_disable_aneg); /** * genphy_c45_restart_aneg - Enable and restart auto-negotiation * @phydev: target phy_device struct * * This assumes that the auto-negotiation MMD is present. * * Enable and restart auto-negotiation. */ int genphy_c45_restart_aneg(struct phy_device *phydev) { int val; val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1); if (val < 0) return val; val |= MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART; return phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1, val); } EXPORT_SYMBOL_GPL(genphy_c45_restart_aneg); /** * genphy_c45_aneg_done - return auto-negotiation complete status * @phydev: target phy_device struct * * This assumes that the auto-negotiation MMD is present. * * Reads the status register from the auto-negotiation MMD, returning: * - positive if auto-negotiation is complete * - negative errno code on error * - zero otherwise */ int genphy_c45_aneg_done(struct phy_device *phydev) { int val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1); return val < 0 ? val : val & MDIO_AN_STAT1_COMPLETE ? 1 : 0; } EXPORT_SYMBOL_GPL(genphy_c45_aneg_done); /** * genphy_c45_read_link - read the overall link status from the MMDs * @phydev: target phy_device struct * @mmd_mask: MMDs to read status from * * Read the link status from the specified MMDs, and if they all indicate * that the link is up, return positive. If an error is encountered, * a negative errno will be returned, otherwise zero. */ int genphy_c45_read_link(struct phy_device *phydev, u32 mmd_mask) { int val, devad; bool link = true; while (mmd_mask) { devad = __ffs(mmd_mask); mmd_mask &= ~BIT(devad); /* The link state is latched low so that momentary link * drops can be detected. Do not double-read the status * register if the link is down. */ val = phy_read_mmd(phydev, devad, MDIO_STAT1); if (val < 0) return val; if (!(val & MDIO_STAT1_LSTATUS)) link = false; } return link; } EXPORT_SYMBOL_GPL(genphy_c45_read_link); /** * genphy_c45_read_lpa - read the link partner advertisment and pause * @phydev: target phy_device struct * * Read the Clause 45 defined base (7.19) and 10G (7.33) status registers, * filling in the link partner advertisment, pause and asym_pause members * in @phydev. This assumes that the auto-negotiation MMD is present, and * the backplane bit (7.48.0) is clear. Clause 45 PHY drivers are expected * to fill in the remainder of the link partner advert from vendor registers. */ int genphy_c45_read_lpa(struct phy_device *phydev) { int val; /* Read the link partner's base page advertisment */ val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA); if (val < 0) return val; phydev->lp_advertising = mii_lpa_to_ethtool_lpa_t(val); phydev->pause = val & LPA_PAUSE_CAP ? 1 : 0; phydev->asym_pause = val & LPA_PAUSE_ASYM ? 1 : 0; /* Read the link partner's 10G advertisment */ val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_10GBT_STAT); if (val < 0) return val; if (val & MDIO_AN_10GBT_STAT_LP10G) phydev->lp_advertising |= ADVERTISED_10000baseT_Full; return 0; } EXPORT_SYMBOL_GPL(genphy_c45_read_lpa); /** * genphy_c45_read_pma - read link speed etc from PMA * @phydev: target phy_device struct */ int genphy_c45_read_pma(struct phy_device *phydev) { int val; val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1); if (val < 0) return val; switch (val & MDIO_CTRL1_SPEEDSEL) { case 0: phydev->speed = SPEED_10; break; case MDIO_PMA_CTRL1_SPEED100: phydev->speed = SPEED_100; break; case MDIO_PMA_CTRL1_SPEED1000: phydev->speed = SPEED_1000; break; case MDIO_CTRL1_SPEED10G: phydev->speed = SPEED_10000; break; default: phydev->speed = SPEED_UNKNOWN; break; } phydev->duplex = DUPLEX_FULL; return 0; } EXPORT_SYMBOL_GPL(genphy_c45_read_pma);