diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0387-net-phy-vsc8514-enable-in-band-SGMII-auto-negotiatio.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0387-net-phy-vsc8514-enable-in-band-SGMII-auto-negotiatio.patch | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0387-net-phy-vsc8514-enable-in-band-SGMII-auto-negotiatio.patch b/target/linux/layerscape/patches-5.4/701-net-0387-net-phy-vsc8514-enable-in-band-SGMII-auto-negotiatio.patch new file mode 100644 index 0000000000..8aaafe5dcc --- /dev/null +++ b/target/linux/layerscape/patches-5.4/701-net-0387-net-phy-vsc8514-enable-in-band-SGMII-auto-negotiatio.patch @@ -0,0 +1,56 @@ +From ebfedac745f6d747df2214e11a89ba44742b3def Mon Sep 17 00:00:00 2001 +From: Alex Marginean <alexandru.marginean@nxp.com> +Date: Fri, 27 Dec 2019 21:44:46 +0200 +Subject: [PATCH] net: phy: vsc8514: enable in-band SGMII auto-negotiation + setting + +The default in-band AN setting for the VSC8514 PHY is not very reliable: +its out-of-reset state is with SerDes AN disabled, but certain boot +firmware (such as U-Boot) enables it during the boot process. + +So its final state as seen by Linux depends on whether the U-Boot PHY +driver has run or not. + +If SGMII auto-negotiation is enabled but not acknowledged by the MAC, +the PHY does not pass traffic. + +But otherwise, it is able to pass traffic both with AN disabled, and +with AN enabled. + +We would like to make this explicitly configurable rather than hardcoded +as "on" as we are doing right now, but we'd rather hardcode it in LSDK +and wait until a solution lands upstream, than invent a solution for +this here. + +Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com> +Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> +--- + drivers/net/phy/mscc.c | 10 ++++++++++ + 1 file changed, 10 insertions(+) + +--- a/drivers/net/phy/mscc.c ++++ b/drivers/net/phy/mscc.c +@@ -176,6 +176,8 @@ enum rgmii_rx_clock_delay { + #define SECURE_ON_PASSWD_LEN_4 0x4000 + + /* Extended Page 3 Registers */ ++#define MSCC_PHY_SERDES_CON 16 ++#define MSCC_PHY_SERDES_ANEG BIT(7) + #define MSCC_PHY_SERDES_TX_VALID_CNT 21 + #define MSCC_PHY_SERDES_TX_CRC_ERR_CNT 22 + #define MSCC_PHY_SERDES_RX_VALID_CNT 28 +@@ -2131,6 +2133,14 @@ static int vsc8514_config_init(struct ph + + mutex_unlock(&phydev->mdio.bus->mdio_lock); + ++ ret = phy_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_EXTENDED_3); ++ if (ret) ++ return ret; ++ ++ ret = phy_set_bits(phydev, MSCC_PHY_SERDES_CON, MSCC_PHY_SERDES_ANEG); ++ if (ret) ++ return ret; ++ + ret = phy_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_STANDARD); + + if (ret) |