linux-kernel - [PATCH 11/14] drivers: net: dsa: qca8k: apply switch revision fix

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Date:   Fri, 23 Apr 2021 03:47:37 +0200
From:   Ansuel Smith <ansuelsmth@...il.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     Ansuel Smith <ansuelsmth@...il.com>, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 11/14] drivers: net: dsa: qca8k: apply switch revision fix

qca8k require special debug value based on the switch revision.

Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
---
 drivers/net/dsa/qca8k.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index 193c269d8ed3..12d2c97d1417 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -909,7 +909,7 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 {
 	const struct qca8k_match_data *data;
 	struct qca8k_priv *priv = ds->priv;
-	u32 reg, val;
+	u32 phy, reg, val;
 
 	/* get the switches ID from the compatible */
 	data = of_device_get_match_data(priv->dev);
@@ -928,7 +928,26 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 	case 3:
 	case 4:
 	case 5:
-		/* Internal PHY, nothing to do */
+		/* Internal PHY, apply revision fixup */
+		phy = qca8k_port_to_phy(port) % PHY_MAX_ADDR;
+		switch (priv->switch_revision) {
+		case 1:
+			/* For 100M waveform */
+			qca8k_phy_dbg_write(priv, phy, 0, 0x02ea);
+			/* Turn on Gigabit clock */
+			qca8k_phy_dbg_write(priv, phy, 0x3d, 0x68a0);
+			break;
+
+		case 2:
+			qca8k_phy_mmd_write(priv, phy, 0x7, 0x3c, 0x0);
+			fallthrough;
+		case 4:
+			qca8k_phy_mmd_write(priv, phy, 0x3, 0x800d, 0x803f);
+			qca8k_phy_dbg_write(priv, phy, 0x3d, 0x6860);
+			qca8k_phy_dbg_write(priv, phy, 0x5, 0x2c46);
+			qca8k_phy_dbg_write(priv, phy, 0x3c, 0x6000);
+			break;
+		}
 		return;
 	case 6: /* 2nd CPU port / external PHY */
 		if (state->interface != PHY_INTERFACE_MODE_RGMII &&
-- 
2.30.2