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56 lines
1.9 KiB
Diff
56 lines
1.9 KiB
Diff
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From 723970affdd8766fa0d91cd34bf2ffc861538b5f Mon Sep 17 00:00:00 2001
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From: Luo Jie <quic_luoj@quicinc.com>
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Date: Sun, 16 Jul 2023 16:49:24 +0800
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Subject: [PATCH 6/6] net: phy: at803x: add qca8081 fifo reset on the link
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changed
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The qca8081 sgmii fifo needs to be reset on link down and
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released on the link up in case of any abnormal issue
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such as the packet blocked on the PHY.
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Signed-off-by: Luo Jie <quic_luoj@quicinc.com>
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Reviewed-by: Andrew Lunn <andrew@lunn.ch>
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Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/phy/at803x.c | 14 ++++++++++++++
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1 file changed, 14 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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@@ -276,6 +276,9 @@
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#define QCA808X_PHY_MMD7_CHIP_TYPE 0x901d
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#define QCA808X_PHY_CHIP_TYPE_1G BIT(0)
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+#define QCA8081_PHY_SERDES_MMD1_FIFO_CTRL 0x9072
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+#define QCA8081_PHY_FIFO_RSTN BIT(11)
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+
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MODULE_DESCRIPTION("Qualcomm Atheros AR803x and QCA808X PHY driver");
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MODULE_AUTHOR("Matus Ujhelyi");
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MODULE_LICENSE("GPL");
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@@ -2037,6 +2040,16 @@ static int qca808x_get_features(struct p
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return 0;
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}
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+static void qca808x_link_change_notify(struct phy_device *phydev)
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+{
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+ /* Assert interface sgmii fifo on link down, deassert it on link up,
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+ * the interface device address is always phy address added by 1.
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+ */
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+ mdiobus_c45_modify_changed(phydev->mdio.bus, phydev->mdio.addr + 1,
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+ MDIO_MMD_PMAPMD, QCA8081_PHY_SERDES_MMD1_FIFO_CTRL,
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+ QCA8081_PHY_FIFO_RSTN, phydev->link ? QCA8081_PHY_FIFO_RSTN : 0);
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+}
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+
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static struct phy_driver at803x_driver[] = {
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{
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/* Qualcomm Atheros AR8035 */
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@@ -2213,6 +2226,7 @@ static struct phy_driver at803x_driver[]
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.soft_reset = qca808x_soft_reset,
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.cable_test_start = qca808x_cable_test_start,
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.cable_test_get_status = qca808x_cable_test_get_status,
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+ .link_change_notify = qca808x_link_change_notify,
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}, };
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module_phy_driver(at803x_driver);
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