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92 lines
3.2 KiB
Diff
92 lines
3.2 KiB
Diff
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From 1ca8311949aec5c9447645731ef1c6bc5bd71350 Mon Sep 17 00:00:00 2001
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From: Ansuel Smith <ansuelsmth@gmail.com>
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Date: Sun, 10 Oct 2021 00:46:16 +0200
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Subject: net: phy: at803x: add DAC amplitude fix for 8327 phy
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QCA8327 internal phy require DAC amplitude adjustement set to +6% with
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100m speed. Also add additional define to report a change of the same
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reg in QCA8337. (different scope it does set 1000m voltage)
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Add link_change_notify function to set the proper amplitude adjustement
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on PHY_RUNNING state and disable on any other state.
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Fixes: b4df02b562f4 ("net: phy: at803x: add support for qca 8327 A variant internal phy")
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Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
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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 | 33 +++++++++++++++++++++++++++++++++
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1 file changed, 33 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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@@ -87,6 +87,8 @@
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#define AT803X_PSSR_MR_AN_COMPLETE 0x0200
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#define AT803X_DEBUG_REG_0 0x00
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+#define QCA8327_DEBUG_MANU_CTRL_EN BIT(2)
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+#define QCA8337_DEBUG_MANU_CTRL_EN GENMASK(3, 2)
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#define AT803X_DEBUG_RX_CLK_DLY_EN BIT(15)
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#define AT803X_DEBUG_REG_5 0x05
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@@ -1222,9 +1224,37 @@ static int qca83xx_config_init(struct ph
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break;
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}
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+ /* QCA8327 require DAC amplitude adjustment for 100m set to +6%.
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+ * Disable on init and enable only with 100m speed following
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+ * qca original source code.
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+ */
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+ if (phydev->drv->phy_id == QCA8327_A_PHY_ID ||
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+ phydev->drv->phy_id == QCA8327_B_PHY_ID)
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+ at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_0,
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+ QCA8327_DEBUG_MANU_CTRL_EN, 0);
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+
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return 0;
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}
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+static void qca83xx_link_change_notify(struct phy_device *phydev)
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+{
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+ /* QCA8337 doesn't require DAC Amplitude adjustement */
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+ if (phydev->drv->phy_id == QCA8337_PHY_ID)
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+ return;
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+
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+ /* Set DAC Amplitude adjustment to +6% for 100m on link running */
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+ if (phydev->state == PHY_RUNNING) {
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+ if (phydev->speed == SPEED_100)
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+ at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_0,
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+ QCA8327_DEBUG_MANU_CTRL_EN,
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+ QCA8327_DEBUG_MANU_CTRL_EN);
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+ } else {
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+ /* Reset DAC Amplitude adjustment */
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+ at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_0,
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+ QCA8327_DEBUG_MANU_CTRL_EN, 0);
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+ }
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+}
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+
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static int qca83xx_resume(struct phy_device *phydev)
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{
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int ret, val;
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@@ -1379,6 +1409,7 @@ static struct phy_driver at803x_driver[]
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.phy_id_mask = QCA8K_PHY_ID_MASK,
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.name = "Qualcomm Atheros 8337 internal PHY",
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/* PHY_GBIT_FEATURES */
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+ .link_change_notify = qca83xx_link_change_notify,
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.probe = at803x_probe,
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.flags = PHY_IS_INTERNAL,
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.config_init = qca83xx_config_init,
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@@ -1394,6 +1425,7 @@ static struct phy_driver at803x_driver[]
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.phy_id_mask = QCA8K_PHY_ID_MASK,
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.name = "Qualcomm Atheros 8327-A internal PHY",
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/* PHY_GBIT_FEATURES */
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+ .link_change_notify = qca83xx_link_change_notify,
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.probe = at803x_probe,
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.flags = PHY_IS_INTERNAL,
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.config_init = qca83xx_config_init,
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@@ -1409,6 +1441,7 @@ static struct phy_driver at803x_driver[]
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.phy_id_mask = QCA8K_PHY_ID_MASK,
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.name = "Qualcomm Atheros 8327-B internal PHY",
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/* PHY_GBIT_FEATURES */
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+ .link_change_notify = qca83xx_link_change_notify,
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.probe = at803x_probe,
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.flags = PHY_IS_INTERNAL,
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.config_init = qca83xx_config_init,
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