| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | From: Roman Yeryomin <roman@advem.lv> |
| 2 | Subject: kernel: add at803x fix for sgmii mode |
| 3 | |
| 4 | Some (possibly broken) bootloaders incorreclty initialize at8033 |
| 5 | phy. This patch enables sgmii autonegotiation mode. |
| 6 | |
| 7 | [john@phrozen.org: felix added this to his upstream queue] |
| 8 | |
| 9 | Signed-off-by: Roman Yeryomin <roman@advem.lv> |
| 10 | --- |
| 11 | drivers/net/phy/at803x.c | 25 +++++++++++++++++++++++++ |
| 12 | 1 file changed, 25 insertions(+) |
| 13 | |
| 14 | --- a/drivers/net/phy/at803x.c |
| 15 | +++ b/drivers/net/phy/at803x.c |
| 16 | @@ -46,6 +46,7 @@ |
| 17 | #define AT803X_LOC_MAC_ADDR_32_47_OFFSET 0x804A |
| 18 | #define AT803X_REG_CHIP_CONFIG 0x1f |
| 19 | #define AT803X_BT_BX_REG_SEL 0x8000 |
| 20 | +#define AT803X_SGMII_ANEG_EN 0x1000 |
| 21 | |
| 22 | #define AT803X_DEBUG_ADDR 0x1D |
| 23 | #define AT803X_DEBUG_DATA 0x1E |
| 24 | @@ -259,6 +260,27 @@ static int at803x_probe(struct phy_devic |
| 25 | static int at803x_config_init(struct phy_device *phydev) |
| 26 | { |
| 27 | int ret; |
| 28 | + u32 v; |
| 29 | + |
| 30 | + if (phydev->drv->phy_id == ATH8031_PHY_ID && |
| 31 | + phydev->interface == PHY_INTERFACE_MODE_SGMII) |
| 32 | + { |
| 33 | + v = phy_read(phydev, AT803X_REG_CHIP_CONFIG); |
| 34 | + /* select SGMII/fiber page */ |
| 35 | + ret = phy_write(phydev, AT803X_REG_CHIP_CONFIG, |
| 36 | + v & ~AT803X_BT_BX_REG_SEL); |
| 37 | + if (ret) |
| 38 | + return ret; |
| 39 | + /* enable SGMII autonegotiation */ |
| 40 | + ret = phy_write(phydev, MII_BMCR, AT803X_SGMII_ANEG_EN); |
| 41 | + if (ret) |
| 42 | + return ret; |
| 43 | + /* select copper page */ |
| 44 | + ret = phy_write(phydev, AT803X_REG_CHIP_CONFIG, |
| 45 | + v | AT803X_BT_BX_REG_SEL); |
| 46 | + if (ret) |
| 47 | + return ret; |
| 48 | + } |
| 49 | |
| 50 | /* The RX and TX delay default is: |
| 51 | * after HW reset: RX delay enabled and TX delay disabled |