netdev - [PATCH net-next 13/13] net: dsa: sja1105: plug in support for 2500base-x

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Date:   Wed,  9 Jun 2021 21:41:55 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Cc:     Wong Vee Khee <vee.khee.wong@...ux.intel.com>,
        Ong Boon Leong <boon.leong.ong@...el.com>,
        Michael Sit Wei Hong <michael.wei.hong.sit@...el.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King - ARM Linux admin <linux@...linux.org.uk>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: [PATCH net-next 13/13] net: dsa: sja1105: plug in support for 2500base-x

From: Vladimir Oltean <vladimir.oltean@....com>

The MAC treats 2500base-x same as SGMII (yay for that) except that it
must be set to a different speed.

Extend all places that check for SGMII to also check for 2500base-x.

Also add the missing 2500base-x compatibility matrix entry for SJA1110D.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 drivers/net/dsa/sja1105/sja1105_main.c | 19 ++++++++++++++++---
 drivers/net/dsa/sja1105/sja1105_spi.c  |  2 ++
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index aca243665f3b..a901803dbf02 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -1046,6 +1046,9 @@ static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
 	case SPEED_1000:
 		speed = priv->info->port_speed[SJA1105_SPEED_1000MBPS];
 		break;
+	case SPEED_2500:
+		speed = priv->info->port_speed[SJA1105_SPEED_2500MBPS];
+		break;
 	default:
 		dev_err(dev, "Invalid speed %iMbps\n", speed_mbps);
 		return -EINVAL;
@@ -1060,6 +1063,8 @@ static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
 	 */
 	if (priv->phy_mode[port] == PHY_INTERFACE_MODE_SGMII)
 		mac[port].speed = priv->info->port_speed[SJA1105_SPEED_1000MBPS];
+	else if (priv->phy_mode[port] == PHY_INTERFACE_MODE_2500BASEX)
+		mac[port].speed = priv->info->port_speed[SJA1105_SPEED_2500MBPS];
 	else
 		mac[port].speed = speed;
 
@@ -1172,6 +1177,10 @@ static void sja1105_phylink_validate(struct dsa_switch *ds, int port,
 	if (mii->xmii_mode[port] == XMII_MODE_RGMII ||
 	    mii->xmii_mode[port] == XMII_MODE_SGMII)
 		phylink_set(mask, 1000baseT_Full);
+	if (priv->info->supports_2500basex[port]) {
+		phylink_set(mask, 2500baseT_Full);
+		phylink_set(mask, 2500baseX_Full);
+	}
 
 	bitmap_and(supported, supported, mask, __ETHTOOL_LINK_MODE_MASK_NBITS);
 	bitmap_and(state->advertising, state->advertising, mask,
@@ -1859,7 +1868,8 @@ int sja1105_static_config_reload(struct sja1105_private *priv,
 							      mac[i].speed);
 		mac[i].speed = priv->info->port_speed[SJA1105_SPEED_AUTO];
 
-		if (priv->phy_mode[i] == PHY_INTERFACE_MODE_SGMII)
+		if (priv->phy_mode[i] == PHY_INTERFACE_MODE_SGMII ||
+		    priv->phy_mode[i] == PHY_INTERFACE_MODE_2500BASEX)
 			bmcr[i] = mdiobus_read(priv->mdio_pcs, i, reg_addr);
 	}
 
@@ -1914,7 +1924,8 @@ int sja1105_static_config_reload(struct sja1105_private *priv,
 		if (rc < 0)
 			goto out;
 
-		if (priv->phy_mode[i] != PHY_INTERFACE_MODE_SGMII)
+		if (priv->phy_mode[i] != PHY_INTERFACE_MODE_SGMII &&
+		    priv->phy_mode[i] != PHY_INTERFACE_MODE_2500BASEX)
 			continue;
 
 		if (bmcr[i] & BMCR_ANENABLE)
@@ -1931,7 +1942,9 @@ int sja1105_static_config_reload(struct sja1105_private *priv,
 		if (!phylink_autoneg_inband(mode)) {
 			int speed = SPEED_UNKNOWN;
 
-			if (bmcr[i] & BMCR_SPEED1000)
+			if (priv->phy_mode[i] == PHY_INTERFACE_MODE_2500BASEX)
+				speed = SPEED_2500;
+			else if (bmcr[i] & BMCR_SPEED1000)
 				speed = SPEED_1000;
 			else if (bmcr[i] & BMCR_SPEED100)
 				speed = SPEED_100;
diff --git a/drivers/net/dsa/sja1105/sja1105_spi.c b/drivers/net/dsa/sja1105/sja1105_spi.c
index e6c2cb68fcc4..53c2213660a3 100644
--- a/drivers/net/dsa/sja1105/sja1105_spi.c
+++ b/drivers/net/dsa/sja1105/sja1105_spi.c
@@ -939,6 +939,8 @@ const struct sja1105_info sja1110d_info = {
 				   false, false, false, false, false, false},
 	.supports_sgmii		= {false, true, true, true, true,
 				   false, false, false, false, false, false},
+	.supports_2500basex     = {false, false, false, true, true,
+				   false, false, false, false, false, false},
 	.internal_phy		= {SJA1105_NO_PHY, SJA1105_NO_PHY,
 				   SJA1105_NO_PHY, SJA1105_NO_PHY,
 				   SJA1105_NO_PHY, SJA1105_PHY_BASE_T1,
-- 
2.25.1