Messages in this thread Patch in this message | | | From | Oleksij Rempel <> | Subject | [PATCH net-next v5 11/23] net: phy: at803x: implement ethtool access to SmartEEE functionality | Date | Mon, 6 Feb 2023 14:50:38 +0100 |
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If AR8035 PHY is used with a MAC without EEE support (iMX6, etc), then we need to process ethtool_eee::tx_lpi_timer and tx_lpi_enabled by the PHY driver. So, add get/set_eee support for this functionality.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> --- drivers/net/phy/at803x.c | 109 +++++++++++++++++++++++++++++++++++++-- 1 file changed, 104 insertions(+), 5 deletions(-)
diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c index 22f4458274aa..9eb4439b0afc 100644 --- a/drivers/net/phy/at803x.c +++ b/drivers/net/phy/at803x.c @@ -166,8 +166,18 @@ #define AT803X_MMD3_SMARTEEE_CTL1 0x805b #define AT803X_MMD3_SMARTEEE_CTL2 0x805c +#define AT803X_MMD3_SMARTEEE_LPI_TIME_LOW GENMASK(15, 0) +#define AT803X_MMD3_SMARTEEE_LPI_TIME_15_0 GENMASK(15, 0) #define AT803X_MMD3_SMARTEEE_CTL3 0x805d #define AT803X_MMD3_SMARTEEE_CTL3_LPI_EN BIT(8) +#define AT803X_MMD3_SMARTEEE_LPI_TIME_HIGH GENMASK(7, 0) +#define AT803X_MMD3_SMARTEEE_LPI_TIME_23_16 GENMASK(23, 16) +/* Tx LPI timer resolution */ +#define AT803X_MMD3_SMARTEEE_LPI_TIME_RESOL_NS 163840 +#define AT803X_MMD3_SMARTEEE_LPI_TIME_MAX_US \ + ((GENMASK(23, 0) * AT803X_MMD3_SMARTEEE_LPI_TIME_RESOL_NS) / \ + NSEC_PER_USEC) +#define AT803X_MMD3_SMARTEEE_LPI_TIME_DEF_US 335544 #define ATH9331_PHY_ID 0x004dd041 #define ATH8030_PHY_ID 0x004dd076 @@ -951,17 +961,26 @@ static int at803x_get_features(struct phy_device *phydev) return 0; } -static int at803x_smarteee_config(struct phy_device *phydev) +static int at803x_smarteee_config(struct phy_device *phydev, bool enable, + u32 tx_lpi_timer_us) { struct at803x_priv *priv = phydev->priv; + u64 tx_lpi_timer_raw; + u64 tx_lpi_timer_ns; u16 mask = 0, val = 0; int ret; - if (priv->flags & AT803X_DISABLE_SMARTEEE) + if (priv->flags & AT803X_DISABLE_SMARTEEE || !enable) return phy_modify_mmd(phydev, MDIO_MMD_PCS, AT803X_MMD3_SMARTEEE_CTL3, AT803X_MMD3_SMARTEEE_CTL3_LPI_EN, 0); + if (tx_lpi_timer_us > AT803X_MMD3_SMARTEEE_LPI_TIME_MAX_US) { + phydev_err(phydev, "Max LPI timer is %lu microsecs\n", + AT803X_MMD3_SMARTEEE_LPI_TIME_MAX_US); + return -EINVAL; + } + if (priv->smarteee_lpi_tw_1g) { mask |= 0xff00; val |= priv->smarteee_lpi_tw_1g << 8; @@ -978,9 +997,27 @@ static int at803x_smarteee_config(struct phy_device *phydev) if (ret) return ret; + tx_lpi_timer_ns = tx_lpi_timer_us * NSEC_PER_USEC; + tx_lpi_timer_raw = + DIV_ROUND_CLOSEST_ULL(tx_lpi_timer_ns, + AT803X_MMD3_SMARTEEE_LPI_TIME_RESOL_NS); + val = FIELD_PREP(AT803X_MMD3_SMARTEEE_LPI_TIME_LOW, + FIELD_GET(AT803X_MMD3_SMARTEEE_LPI_TIME_15_0, + tx_lpi_timer_raw)); + + ret = phy_write_mmd(phydev, MDIO_MMD_PCS, AT803X_MMD3_SMARTEEE_CTL2, + val); + if (ret) + return ret; + + val = AT803X_MMD3_SMARTEEE_CTL3_LPI_EN | + FIELD_PREP(AT803X_MMD3_SMARTEEE_LPI_TIME_HIGH, + FIELD_GET(AT803X_MMD3_SMARTEEE_LPI_TIME_23_16, + tx_lpi_timer_raw)); + return phy_modify_mmd(phydev, MDIO_MMD_PCS, AT803X_MMD3_SMARTEEE_CTL3, - AT803X_MMD3_SMARTEEE_CTL3_LPI_EN, - AT803X_MMD3_SMARTEEE_CTL3_LPI_EN); + AT803X_MMD3_SMARTEEE_CTL3_LPI_EN | + AT803X_MMD3_SMARTEEE_LPI_TIME_HIGH, val); } static int at803x_clk_out_config(struct phy_device *phydev) @@ -1067,7 +1104,8 @@ static int at803x_config_init(struct phy_device *phydev) if (ret < 0) return ret; - ret = at803x_smarteee_config(phydev); + ret = at803x_smarteee_config(phydev, true, + AT803X_MMD3_SMARTEEE_LPI_TIME_DEF_US); if (ret < 0) return ret; @@ -1612,6 +1650,65 @@ static int at803x_cable_test_start(struct phy_device *phydev) return 0; } +static int at803x_get_eee(struct phy_device *phydev, struct ethtool_eee *data) +{ + struct at803x_priv *priv = phydev->priv; + u32 tx_timer_raw; + u64 tx_timer_ns; + int ret; + + /* If SmartEEE is not enabled, it is expected that tx_lpi_* fields + * are processed by the MAC driver. + */ + if (priv->flags & AT803X_DISABLE_SMARTEEE) + return genphy_c45_ethtool_get_eee(phydev, data); + + ret = phy_read_mmd(phydev, MDIO_MMD_PCS, + AT803X_MMD3_SMARTEEE_CTL2); + tx_timer_raw = FIELD_PREP(AT803X_MMD3_SMARTEEE_LPI_TIME_15_0, + FIELD_GET(AT803X_MMD3_SMARTEEE_LPI_TIME_LOW, + ret)); + if (ret < 0) + return ret; + + ret = phy_read_mmd(phydev, MDIO_MMD_PCS, + AT803X_MMD3_SMARTEEE_CTL3); + if (ret < 0) + return ret; + + tx_timer_raw |= FIELD_PREP(AT803X_MMD3_SMARTEEE_LPI_TIME_23_16, + FIELD_GET(AT803X_MMD3_SMARTEEE_LPI_TIME_HIGH, + ret)); + tx_timer_ns = tx_timer_raw * AT803X_MMD3_SMARTEEE_LPI_TIME_RESOL_NS; + data->tx_lpi_timer = DIV_ROUND_CLOSEST_ULL(tx_timer_ns, NSEC_PER_USEC); + + data->tx_lpi_enabled = !!(ret & AT803X_MMD3_SMARTEEE_CTL3_LPI_EN); + + return genphy_c45_ethtool_get_eee(phydev, data); +} + +static int at803x_set_eee(struct phy_device *phydev, struct ethtool_eee *data) +{ + struct at803x_priv *priv = phydev->priv; + int ret; + + /* If SmartEEE is not enabled, it is expected that tx_lpi_* fields + * are processed by the MAC driver. + */ + if (priv->flags & AT803X_DISABLE_SMARTEEE) + return genphy_c45_ethtool_set_eee(phydev, data); + + /* Changing Tx LPI on/off or Tx LPI timer settings + * do not require link reset. + */ + ret = at803x_smarteee_config(phydev, data->tx_lpi_enabled, + data->tx_lpi_timer); + if (ret) + return ret; + + return genphy_c45_ethtool_set_eee(phydev, data); +} + static int qca83xx_config_init(struct phy_device *phydev) { u8 switch_revision; @@ -2038,6 +2135,8 @@ static struct phy_driver at803x_driver[] = { .set_tunable = at803x_set_tunable, .cable_test_start = at803x_cable_test_start, .cable_test_get_status = at803x_cable_test_get_status, + .get_eee = at803x_get_eee, + .set_eee = at803x_set_eee, }, { /* Qualcomm Atheros AR8030 */ .phy_id = ATH8030_PHY_ID, -- 2.30.2
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