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Tue, 11 Jan 2022 21:55:30 +0000 From: Robert Hancock To: netdev@vger.kernel.org Cc: andrew@lunn.ch, hkallweit1@gmail.com, linux@armlinux.org.uk, davem@davemloft.net, kuba@kernel.org, Robert Hancock Subject: [PATCH net-next v2 2/3] net: phy: at803x: add fiber support Date: Tue, 11 Jan 2022 15:55:03 -0600 Message-Id: <20220111215504.2714643-3-robert.hancock@calian.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220111215504.2714643-1-robert.hancock@calian.com> References: <20220111215504.2714643-1-robert.hancock@calian.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: CH0PR04CA0021.namprd04.prod.outlook.com (2603:10b6:610:76::26) To YT3PR01MB6274.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:6a::19) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 76545d77-f122-4ac9-fe73-08d9d54d15b2 X-MS-TrafficTypeDiagnostic: YTOPR0101MB0860:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:10000; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Set the appropriate mode based on the hardware mode_cfg strap selection. Enable the appropriate interrupt bits to detect fiber-side link up or down events. Update config_aneg and read_status methods to use the appropriate Clause 37 calls when fiber mode is in use. Signed-off-by: Robert Hancock --- drivers/net/phy/at803x.c | 80 ++++++++++++++++++++++++++++++++++------ 1 file changed, 69 insertions(+), 11 deletions(-) diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c index 23d6f2e5f48b..63d84eb2eddb 100644 --- a/drivers/net/phy/at803x.c +++ b/drivers/net/phy/at803x.c @@ -51,6 +51,8 @@ #define AT803X_INTR_ENABLE_PAGE_RECEIVED BIT(12) #define AT803X_INTR_ENABLE_LINK_FAIL BIT(11) #define AT803X_INTR_ENABLE_LINK_SUCCESS BIT(10) +#define AT803X_INTR_ENABLE_LINK_FAIL_BX BIT(8) +#define AT803X_INTR_ENABLE_LINK_SUCCESS_BX BIT(7) #define AT803X_INTR_ENABLE_WIRESPEED_DOWNGRADE BIT(5) #define AT803X_INTR_ENABLE_POLARITY_CHANGED BIT(1) #define AT803X_INTR_ENABLE_WOL BIT(0) @@ -85,7 +87,17 @@ #define AT803X_DEBUG_DATA 0x1E #define AT803X_MODE_CFG_MASK 0x0F -#define AT803X_MODE_CFG_SGMII 0x01 +#define AT803X_MODE_CFG_BASET_RGMII 0x00 +#define AT803X_MODE_CFG_BASET_SGMII 0x01 +#define AT803X_MODE_CFG_BX1000_RGMII_50 0x02 +#define AT803X_MODE_CFG_BX1000_RGMII_75 0x03 +#define AT803X_MODE_CFG_BX1000_CONV_50 0x04 +#define AT803X_MODE_CFG_BX1000_CONV_75 0x05 +#define AT803X_MODE_CFG_FX100_RGMII_50 0x06 +#define AT803X_MODE_CFG_FX100_CONV_50 0x07 +#define AT803X_MODE_CFG_RGMII_AUTO_MDET 0x0B +#define AT803X_MODE_CFG_FX100_RGMII_75 0x0E +#define AT803X_MODE_CFG_FX100_CONV_75 0x0F #define AT803X_PSSR 0x11 /*PHY-Specific Status Register*/ #define AT803X_PSSR_MR_AN_COMPLETE 0x0200 @@ -283,6 +295,8 @@ struct at803x_priv { u16 clk_25m_mask; u8 smarteee_lpi_tw_1g; u8 smarteee_lpi_tw_100m; + bool is_fiber; + bool is_1000basex; struct regulator_dev *vddio_rdev; struct regulator_dev *vddh_rdev; struct regulator *vddio; @@ -784,7 +798,33 @@ static int at803x_probe(struct phy_device *phydev) return ret; } + if (phydev->drv->phy_id == ATH8031_PHY_ID) { + int ccr = phy_read(phydev, AT803X_REG_CHIP_CONFIG); + int mode_cfg; + + if (ccr < 0) + goto err; + mode_cfg = ccr & AT803X_MODE_CFG_MASK; + + switch (mode_cfg) { + case AT803X_MODE_CFG_BX1000_RGMII_50: + case AT803X_MODE_CFG_BX1000_RGMII_75: + priv->is_1000basex = true; + fallthrough; + case AT803X_MODE_CFG_FX100_RGMII_50: + case AT803X_MODE_CFG_FX100_RGMII_75: + priv->is_fiber = true; + break; + } + } + return 0; + +err: + if (priv->vddio) + regulator_disable(priv->vddio); + + return ret; } static void at803x_remove(struct phy_device *phydev) @@ -797,6 +837,7 @@ static void at803x_remove(struct phy_device *phydev) static int at803x_get_features(struct phy_device *phydev) { + struct at803x_priv *priv = phydev->priv; int err; err = genphy_read_abilities(phydev); @@ -823,12 +864,13 @@ static int at803x_get_features(struct phy_device *phydev) * As a result of that, ESTATUS_1000_XFULL is set * to 1 even when operating in copper TP mode. * - * Remove this mode from the supported link modes, - * as this driver currently only supports copper - * operation. + * Remove this mode from the supported link modes + * when not operating in 1000BaseX mode. */ - linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, - phydev->supported); + if (!priv->is_1000basex) + linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, + phydev->supported); + return 0; } @@ -892,15 +934,18 @@ static int at8031_pll_config(struct phy_device *phydev) static int at803x_config_init(struct phy_device *phydev) { + struct at803x_priv *priv = phydev->priv; int ret; if (phydev->drv->phy_id == ATH8031_PHY_ID) { - /* Some bootloaders leave the fiber page selected. - * Switch to the copper page, as otherwise we read - * the PHY capabilities from the fiber side. - */ + /* Some bootloaders leave the fiber page selected. + * Switch to the appropriate page (fiber or copper), as otherwise we + * read the PHY capabilities from the wrong page. + */ phy_lock_mdio_bus(phydev); - ret = at803x_write_page(phydev, AT803X_PAGE_COPPER); + ret = at803x_write_page(phydev, + priv->is_fiber ? AT803X_PAGE_FIBER : + AT803X_PAGE_COPPER); phy_unlock_mdio_bus(phydev); if (ret) return ret; @@ -959,6 +1004,7 @@ static int at803x_ack_interrupt(struct phy_device *phydev) static int at803x_config_intr(struct phy_device *phydev) { + struct at803x_priv *priv = phydev->priv; int err; int value; @@ -975,6 +1021,10 @@ static int at803x_config_intr(struct phy_device *phydev) value |= AT803X_INTR_ENABLE_DUPLEX_CHANGED; value |= AT803X_INTR_ENABLE_LINK_FAIL; value |= AT803X_INTR_ENABLE_LINK_SUCCESS; + if (priv->is_fiber) { + value |= AT803X_INTR_ENABLE_LINK_FAIL_BX; + value |= AT803X_INTR_ENABLE_LINK_SUCCESS_BX; + } err = phy_write(phydev, AT803X_INTR_ENABLE, value); } else { @@ -1107,8 +1157,12 @@ static int at803x_read_specific_status(struct phy_device *phydev) static int at803x_read_status(struct phy_device *phydev) { + struct at803x_priv *priv = phydev->priv; int err, old_link = phydev->link; + if (priv->is_1000basex) + return genphy_c37_read_status(phydev); + /* Update the link, but return if there was an error */ err = genphy_update_link(phydev); if (err) @@ -1162,6 +1216,7 @@ static int at803x_config_mdix(struct phy_device *phydev, u8 ctrl) static int at803x_config_aneg(struct phy_device *phydev) { + struct at803x_priv *priv = phydev->priv; int ret; ret = at803x_config_mdix(phydev, phydev->mdix_ctrl); @@ -1178,6 +1233,9 @@ static int at803x_config_aneg(struct phy_device *phydev) return ret; } + if (priv->is_1000basex) + return genphy_c37_config_aneg(phydev); + /* Do not restart auto-negotiation by setting ret to 0 defautly, * when calling __genphy_config_aneg later. */ -- 2.31.1