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-rw-r--r--target/linux/generic/pending-4.9/735-net-phy-at803x-fix-at8033-sgmii-mode.patch59
1 files changed, 59 insertions, 0 deletions
diff --git a/target/linux/generic/pending-4.9/735-net-phy-at803x-fix-at8033-sgmii-mode.patch b/target/linux/generic/pending-4.9/735-net-phy-at803x-fix-at8033-sgmii-mode.patch
new file mode 100644
index 0000000000..c5786a5d6a
--- /dev/null
+++ b/target/linux/generic/pending-4.9/735-net-phy-at803x-fix-at8033-sgmii-mode.patch
@@ -0,0 +1,59 @@
+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(+)
+
+diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
+index 4a55130dcb1c..434efb68bc5d 100644
+--- a/drivers/net/phy/at803x.c
++++ b/drivers/net/phy/at803x.c
+@@ -55,6 +55,10 @@
+ #define AT803X_DEBUG_ADDR 0x1D
+ #define AT803X_DEBUG_DATA 0x1E
+
++#define AT803X_REG_CHIP_CONFIG 0x1f
++#define AT803X_BT_BX_REG_SEL 0x8000
++#define AT803X_SGMII_ANEG_EN 0x1000
++
+ #define AT803X_MODE_CFG_MASK 0x0F
+ #define AT803X_MODE_CFG_SGMII 0x01
+
+@@ -295,6 +299,27 @@ static int at803x_config_init(struct phy_device *phydev)
+ {
+ struct at803x_platform_data *pdata;
+ 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;
++ }
+
+ ret = genphy_config_init(phydev);
+ if (ret < 0)
+--
+2.11.0
+