diff options
Diffstat (limited to 'drivers/net/phy/dp83td510.c')
| -rw-r--r-- | drivers/net/phy/dp83td510.c | 119 |
1 files changed, 113 insertions, 6 deletions
diff --git a/drivers/net/phy/dp83td510.c b/drivers/net/phy/dp83td510.c index 551e37786c2d..92aa3a2b9744 100644 --- a/drivers/net/phy/dp83td510.c +++ b/drivers/net/phy/dp83td510.c @@ -58,6 +58,10 @@ static const u16 dp83td510_mse_sqi_map[] = { 0x0000 /* 24dB =< SNR */ }; +struct dp83td510_priv { + bool alcd_test_active; +}; + /* Time Domain Reflectometry (TDR) Functionality of DP83TD510 PHY * * I assume that this PHY is using a variation of Spread Spectrum Time Domain @@ -169,6 +173,10 @@ static const u16 dp83td510_mse_sqi_map[] = { #define DP83TD510E_UNKN_030E 0x30e #define DP83TD510E_030E_VAL 0x2520 +#define DP83TD510E_ALCD_STAT 0xa9f +#define DP83TD510E_ALCD_COMPLETE BIT(15) +#define DP83TD510E_ALCD_CABLE_LENGTH GENMASK(10, 0) + static int dp83td510_config_intr(struct phy_device *phydev) { int ret; @@ -325,8 +333,23 @@ static int dp83td510_get_sqi_max(struct phy_device *phydev) */ static int dp83td510_cable_test_start(struct phy_device *phydev) { + struct dp83td510_priv *priv = phydev->priv; int ret; + /* If link partner is active, we won't be able to use TDR, since + * we can't force link partner to be silent. The autonegotiation + * pulses will be too frequent and the TDR sequence will be + * too long. So, TDR will always fail. Since the link is established + * we already know that the cable is working, so we can get some + * extra information line the cable length using ALCD. + */ + if (phydev->link) { + priv->alcd_test_active = true; + return 0; + } + + priv->alcd_test_active = false; + ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND2, DP83TD510E_CTRL, DP83TD510E_CTRL_HW_RESET); if (ret) @@ -402,8 +425,8 @@ static int dp83td510_cable_test_start(struct phy_device *phydev) } /** - * dp83td510_cable_test_get_status - Get the status of the cable test for the - * DP83TD510 PHY. + * dp83td510_cable_test_get_tdr_status - Get the status of the TDR test for the + * DP83TD510 PHY. * @phydev: Pointer to the phy_device structure. * @finished: Pointer to a boolean that indicates whether the test is finished. * @@ -411,13 +434,11 @@ static int dp83td510_cable_test_start(struct phy_device *phydev) * * Returns: 0 on success or a negative error code on failure. */ -static int dp83td510_cable_test_get_status(struct phy_device *phydev, - bool *finished) +static int dp83td510_cable_test_get_tdr_status(struct phy_device *phydev, + bool *finished) { int ret, stat; - *finished = false; - ret = phy_read_mmd(phydev, MDIO_MMD_VEND2, DP83TD510E_TDR_CFG); if (ret < 0) return ret; @@ -459,6 +480,77 @@ static int dp83td510_cable_test_get_status(struct phy_device *phydev, return phy_init_hw(phydev); } +/** + * dp83td510_cable_test_get_alcd_status - Get the status of the ALCD test for the + * DP83TD510 PHY. + * @phydev: Pointer to the phy_device structure. + * @finished: Pointer to a boolean that indicates whether the test is finished. + * + * The function sets the @finished flag to true if the test is complete. + * The function reads the cable length and reports it to the user. + * + * Returns: 0 on success or a negative error code on failure. + */ +static int dp83td510_cable_test_get_alcd_status(struct phy_device *phydev, + bool *finished) +{ + unsigned int location; + int ret, phy_sts; + + phy_sts = phy_read(phydev, DP83TD510E_PHY_STS); + + if (!(phy_sts & DP83TD510E_LINK_STATUS)) { + /* If the link is down, we can't do any thing usable now */ + ethnl_cable_test_result_with_src(phydev, ETHTOOL_A_CABLE_PAIR_A, + ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC, + ETHTOOL_A_CABLE_INF_SRC_ALCD); + *finished = true; + return 0; + } + + ret = phy_read_mmd(phydev, MDIO_MMD_VEND2, DP83TD510E_ALCD_STAT); + if (ret < 0) + return ret; + + if (!(ret & DP83TD510E_ALCD_COMPLETE)) + return 0; + + location = FIELD_GET(DP83TD510E_ALCD_CABLE_LENGTH, ret) * 100; + + ethnl_cable_test_fault_length_with_src(phydev, ETHTOOL_A_CABLE_PAIR_A, + location, + ETHTOOL_A_CABLE_INF_SRC_ALCD); + + ethnl_cable_test_result_with_src(phydev, ETHTOOL_A_CABLE_PAIR_A, + ETHTOOL_A_CABLE_RESULT_CODE_OK, + ETHTOOL_A_CABLE_INF_SRC_ALCD); + *finished = true; + + return 0; +} + +/** + * dp83td510_cable_test_get_status - Get the status of the cable test for the + * DP83TD510 PHY. + * @phydev: Pointer to the phy_device structure. + * @finished: Pointer to a boolean that indicates whether the test is finished. + * + * The function sets the @finished flag to true if the test is complete. + * + * Returns: 0 on success or a negative error code on failure. + */ +static int dp83td510_cable_test_get_status(struct phy_device *phydev, + bool *finished) +{ + struct dp83td510_priv *priv = phydev->priv; + *finished = false; + + if (priv->alcd_test_active) + return dp83td510_cable_test_get_alcd_status(phydev, finished); + + return dp83td510_cable_test_get_tdr_status(phydev, finished); +} + static int dp83td510_get_features(struct phy_device *phydev) { /* This PHY can't respond on MDIO bus if no RMII clock is enabled. @@ -477,12 +569,27 @@ static int dp83td510_get_features(struct phy_device *phydev) return 0; } +static int dp83td510_probe(struct phy_device *phydev) +{ + struct device *dev = &phydev->mdio.dev; + struct dp83td510_priv *priv; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + phydev->priv = priv; + + return 0; +} + static struct phy_driver dp83td510_driver[] = { { PHY_ID_MATCH_MODEL(DP83TD510E_PHY_ID), .name = "TI DP83TD510E", .flags = PHY_POLL_CABLE_TEST, + .probe = dp83td510_probe, .config_aneg = dp83td510_config_aneg, .read_status = dp83td510_read_status, .get_features = dp83td510_get_features, |