1 files changed, 51 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.10/735-net-phy-at803x-fix-at8033-sgmii-mode.patch b/target/linux/generic/pending-5.10/735-net-phy-at803x-fix-at8033-sgmii-mode.patch
new file mode 100644
index 0000000000..b063b10251
--- /dev/null
+++ b/target/linux/generic/pending-5.10/735-net-phy-at803x-fix-at8033-sgmii-mode.patch
@@ -0,0 +1,51 @@
+From: Roman Yeryomin <roman@advem.lv>
+Subject: kernel: add at803x fix for sgmii mode
+
+Some (possibly broken) bootloaders incorreclty initialize at8033
+phy. This patch enables sgmii autonegotiation mode.
+
+[john@phrozen.org: felix added this to his upstream queue]
+
+Signed-off-by: Roman Yeryomin <roman@advem.lv>
+---
+ drivers/net/phy/at803x.c | 25 +++++++++++++++++++++++++
+ 1 file changed, 25 insertions(+)
+
+--- a/drivers/net/phy/at803x.c
++++ b/drivers/net/phy/at803x.c
+@@ -76,6 +76,7 @@
+ #define AT803X_LOC_MAC_ADDR_32_47_OFFSET	0x804A
+ #define AT803X_REG_CHIP_CONFIG			0x1f
+ #define AT803X_BT_BX_REG_SEL			0x8000
++#define AT803X_SGMII_ANEG_EN			0x1000
+ 
+ #define AT803X_DEBUG_ADDR			0x1D
+ #define AT803X_DEBUG_DATA			0x1E
+@@ -562,6 +563,27 @@ static int at8031_pll_config(struct phy_
+ static int at803x_config_init(struct phy_device *phydev)
+ {
+ 	int ret;
++	u32 v;
++
++	if (phydev->drv->phy_id == ATH8031_PHY_ID &&
++		phydev->interface == PHY_INTERFACE_MODE_SGMII)
++	{
++		v = phy_read(phydev, AT803X_REG_CHIP_CONFIG);
++		/* select SGMII/fiber page */
++		ret = phy_write(phydev, AT803X_REG_CHIP_CONFIG,
++						v & ~AT803X_BT_BX_REG_SEL);
++		if (ret)
++			return ret;
++		/* enable SGMII autonegotiation */
++		ret = phy_write(phydev, MII_BMCR, AT803X_SGMII_ANEG_EN);
++		if (ret)
++			return ret;
++		/* select copper page */
++		ret = phy_write(phydev, AT803X_REG_CHIP_CONFIG,
++						v | AT803X_BT_BX_REG_SEL);
++		if (ret)
++			return ret;
++	}
+ 
+ 	/* The RX and TX delay default is:
+ 	 *   after HW reset: RX delay enabled and TX delay disabled