From: Roman Yeryomin 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 --- drivers/net/phy/at803x.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) --- a/drivers/net/phy/at803x.c +++ b/drivers/net/phy/at803x.c @@ -46,6 +46,7 @@ #define AT803X_FUNC_DATA 0x4003 #define AT803X_REG_CHIP_CONFIG 0x1f #define AT803X_BT_BX_REG_SEL 0x8000 +#define AT803X_SGMII_ANEG_EN 0x1000 #define AT803X_PCS_SMART_EEE_CTRL3 0x805D #define AT803X_SMART_EEE_CTRL3_LPI_TX_DELAY_SEL_MASK 0x3 @@ -268,6 +269,27 @@ static int at803x_config_init(struct phy { 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)