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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
@@ -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
@@ -292,6 +293,27 @@ 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)
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