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 @@ -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 @@ -296,6 +300,27 @@ 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)