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52 lines
1.5 KiB
Diff
52 lines
1.5 KiB
Diff
From: Roman Yeryomin <roman@advem.lv>
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Subject: kernel: add at803x fix for sgmii mode
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Some (possibly broken) bootloaders incorreclty initialize at8033
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phy. This patch enables sgmii autonegotiation mode.
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[john@phrozen.org: felix added this to his upstream queue]
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Signed-off-by: Roman Yeryomin <roman@advem.lv>
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---
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drivers/net/phy/at803x.c | 25 +++++++++++++++++++++++++
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1 file changed, 25 insertions(+)
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--- a/drivers/net/phy/at803x.c
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+++ b/drivers/net/phy/at803x.c
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@@ -46,6 +46,7 @@
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#define AT803X_LOC_MAC_ADDR_32_47_OFFSET 0x804A
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#define AT803X_REG_CHIP_CONFIG 0x1f
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#define AT803X_BT_BX_REG_SEL 0x8000
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+#define AT803X_SGMII_ANEG_EN 0x1000
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#define AT803X_DEBUG_ADDR 0x1D
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#define AT803X_DEBUG_DATA 0x1E
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@@ -259,6 +260,27 @@ static int at803x_probe(struct phy_devic
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static int at803x_config_init(struct phy_device *phydev)
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{
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int ret;
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+ u32 v;
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+
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+ if (phydev->drv->phy_id == ATH8031_PHY_ID &&
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+ phydev->interface == PHY_INTERFACE_MODE_SGMII)
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+ {
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+ v = phy_read(phydev, AT803X_REG_CHIP_CONFIG);
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+ /* select SGMII/fiber page */
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+ ret = phy_write(phydev, AT803X_REG_CHIP_CONFIG,
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+ v & ~AT803X_BT_BX_REG_SEL);
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+ if (ret)
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+ return ret;
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+ /* enable SGMII autonegotiation */
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+ ret = phy_write(phydev, MII_BMCR, AT803X_SGMII_ANEG_EN);
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+ if (ret)
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+ return ret;
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+ /* select copper page */
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+ ret = phy_write(phydev, AT803X_REG_CHIP_CONFIG,
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+ v | AT803X_BT_BX_REG_SEL);
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+ if (ret)
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+ return ret;
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+ }
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/* The RX and TX delay default is:
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* after HW reset: RX delay enabled and TX delay disabled
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