netdev - [PATCH net-next v2 3/4] net: phy: c45: add support for 1000BASE-T1

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Message-Id: <20230710205900.52894-4-eichest@gmail.com>
Date: Mon, 10 Jul 2023 22:58:59 +0200
From: Stefan Eichenberger <eichest@...il.com>
To: netdev@...r.kernel.org,
	andrew@...n.ch,
	hkallweit1@...il.com,
	linux@...linux.org.uk,
	francesco.dolcini@...adex.com
Cc: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	eichest@...il.com
Subject: [PATCH net-next v2 3/4] net: phy: c45: add support for 1000BASE-T1

Add support for 1000BASE-T1 to the forced link setup.

Signed-off-by: Stefan Eichenberger <eichest@...il.com>
---
 drivers/net/phy/phy-c45.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c
index 93ed072233779..ec1232066b914 100644
--- a/drivers/net/phy/phy-c45.c
+++ b/drivers/net/phy/phy-c45.c
@@ -108,7 +108,7 @@ EXPORT_SYMBOL_GPL(genphy_c45_pma_baset1_setup_master_slave);
  */
 int genphy_c45_pma_setup_forced(struct phy_device *phydev)
 {
-	int ctrl1, ctrl2, ret;
+	int bt1_ctrl, ctrl1, ctrl2, ret;
 
 	/* Half duplex is not supported */
 	if (phydev->duplex != DUPLEX_FULL)
@@ -176,6 +176,12 @@ int genphy_c45_pma_setup_forced(struct phy_device *phydev)
 		ret = genphy_c45_pma_baset1_setup_master_slave(phydev);
 		if (ret < 0)
 			return ret;
+
+		bt1_ctrl = 0;
+		if (phydev->speed == SPEED_1000)
+			bt1_ctrl = MDIO_PMA_PMD_BT1_CTRL_STRAP_B1000;
+		phy_modify_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_PMD_BT1_CTRL,
+			       MDIO_PMA_PMD_BT1_CTRL_STRAP, bt1_ctrl);
 	}
 
 	return genphy_c45_an_disable_aneg(phydev);
@@ -976,6 +982,10 @@ int genphy_c45_pma_read_abilities(struct phy_device *phydev)
 					 phydev->supported,
 					 val & MDIO_PMA_PMD_BT1_B10L_ABLE);
 
+			linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT1_Full_BIT,
+					 phydev->supported,
+					 val & MDIO_PMA_PMD_BT1_B1000_ABLE);
+
 			val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_T1_STAT);
 			if (val < 0)
 				return val;
-- 
2.39.2