linux-kernel - [PATCH 6/8] net: ethernet: ti: am65-cpsw: Add support for SGMII mode for J7200 CPSW5G

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Date:   Wed, 14 Sep 2022 15:20:51 +0530
From:   Siddharth Vadapalli <s-vadapalli@...com>
To:     <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski@...aro.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <linux@...linux.org.uk>,
        <vladimir.oltean@....com>, <grygorii.strashko@...com>,
        <vigneshr@...com>, <nsekhar@...com>
CC:     <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <kishon@...com>,
        <s-vadapalli@...com>
Subject: [PATCH 6/8] net: ethernet: ti: am65-cpsw: Add support for SGMII mode for J7200 CPSW5G

Add support for SGMII mode in both fixed-link MAC2MAC master mode and
MAC2PHY modes for CPSW5G ports.

Add SGMII mode to the list of extra_modes in j7200_cpswxg_pdata.

The MAC2PHY mode has been tested in fixed-link mode using a bootstrapped
PHY. The MAC2MAC mode has been tested by a customer with J7200 SoC on
their device.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
---
 drivers/net/ethernet/ti/am65-cpsw-nuss.c | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index 1739c389af20..3f40178436ff 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -75,7 +75,15 @@
 #define AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2       0x31C
 
 #define AM65_CPSW_SGMII_CONTROL_REG		0x010
+#define AM65_CPSW_SGMII_MR_ADV_ABILITY_REG	0x018
 #define AM65_CPSW_SGMII_CONTROL_MR_AN_ENABLE	BIT(0)
+#define AM65_CPSW_SGMII_CONTROL_MASTER_MODE	BIT(5)
+
+#define MAC2MAC_MR_ADV_ABILITY_BASE		(BIT(15) | BIT(0))
+#define MAC2MAC_MR_ADV_ABILITY_FULLDUPLEX	BIT(12)
+#define MAC2MAC_MR_ADV_ABILITY_1G		BIT(11)
+#define MAC2MAC_MR_ADV_ABILITY_100M		BIT(10)
+#define MAC2PHY_MR_ADV_ABILITY			BIT(0)
 
 #define AM65_CPSW_CTL_VLAN_AWARE		BIT(1)
 #define AM65_CPSW_CTL_P0_ENABLE			BIT(2)
@@ -1493,6 +1501,7 @@ static void am65_cpsw_nuss_mac_config(struct phylink_config *config, unsigned in
 	struct am65_cpsw_slave_data *slave = container_of(config, struct am65_cpsw_slave_data,
 							  phylink_config);
 	struct am65_cpsw_port *port = container_of(slave, struct am65_cpsw_port, slave);
+	u32 mr_adv_ability = MAC2MAC_MR_ADV_ABILITY_BASE;
 	struct am65_cpsw_common *common = port->common;
 	struct fwnode_handle *fwnode;
 	bool fixed_link = false;
@@ -2105,8 +2114,12 @@ am65_cpsw_nuss_init_port_ndev(struct am65_cpsw_common *common, u32 port_idx)
 		__set_bit(PHY_INTERFACE_MODE_RMII,
 			  port->slave.phylink_config.supported_interfaces);
 	} else if (common->pdata.extra_modes & BIT(port->slave.phy_if)) {
-		__set_bit(PHY_INTERFACE_MODE_QSGMII,
-			  port->slave.phylink_config.supported_interfaces);
+		if (port->slave.phy_if == PHY_INTERFACE_MODE_QSGMII)
+			__set_bit(PHY_INTERFACE_MODE_QSGMII,
+				  port->slave.phylink_config.supported_interfaces);
+		else
+			__set_bit(PHY_INTERFACE_MODE_SGMII,
+				  port->slave.phylink_config.supported_interfaces);
 	} else {
 		dev_err(dev, "selected phy-mode is not supported\n");
 		return -EOPNOTSUPP;
@@ -2744,7 +2757,7 @@ static const struct am65_cpsw_pdata j7200_cpswxg_pdata = {
 	.quirks = 0,
 	.ale_dev_id = "am64-cpswxg",
 	.fdqring_mode = K3_RINGACC_RING_MODE_RING,
-	.extra_modes = BIT(PHY_INTERFACE_MODE_QSGMII),
+	.extra_modes = BIT(PHY_INTERFACE_MODE_QSGMII) | BIT(PHY_INTERFACE_MODE_SGMII),
 };
 
 static const struct of_device_id am65_cpsw_nuss_of_mtable[] = {
-- 
2.25.1