net: ethernet: ti: am65-cpsw: Add support for J7200 CPSW5G

CPSW5G in J7200 supports additional modes like QSGMII and SGMII.
Add new compatible for J7200 and enable QSGMII mode in am65-cpsw driver.
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/ti/am65-cpsw-nuss.c

@@ -74,6 +74,9 @@
 #define AM65_CPSW_PORTN_REG_TS_VLAN_LTYPE_REG	0x318
 #define AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2       0x31C
 
+#define AM65_CPSW_SGMII_CONTROL_REG		0x010
+#define AM65_CPSW_SGMII_CONTROL_MR_AN_ENABLE	BIT(0)
+
 #define AM65_CPSW_CTL_VLAN_AWARE		BIT(1)
 #define AM65_CPSW_CTL_P0_ENABLE			BIT(2)
 #define AM65_CPSW_CTL_P0_TX_CRC_REMOVE		BIT(13)
@@ -1409,7 +1412,14 @@ static const struct net_device_ops am65_cpsw_nuss_netdev_ops = {
 static void am65_cpsw_nuss_mac_config(struct phylink_config *config, unsigned int mode,
 				      const struct phylink_link_state *state)
 {
-	/* Currently not used */
+	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);
+	struct am65_cpsw_common *common = port->common;
+
+	if (common->pdata.extra_modes & BIT(state->interface))
+		writel(AM65_CPSW_SGMII_CONTROL_MR_AN_ENABLE,
+		       port->sgmii_base + AM65_CPSW_SGMII_CONTROL_REG);
 }
 
 static void am65_cpsw_nuss_mac_link_down(struct phylink_config *config, unsigned int mode,
@@ -1847,6 +1857,8 @@ static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
 		port->common = common;
 		port->port_base = common->cpsw_base + AM65_CPSW_NU_PORTS_BASE +
 				  AM65_CPSW_NU_PORTS_OFFSET * (port_id);
+		if (common->pdata.extra_modes)
+			port->sgmii_base = common->ss_base + AM65_CPSW_SGMII_BASE * (port_id);
 		port->stat_base = common->cpsw_base + AM65_CPSW_NU_STATS_BASE +
 				  (AM65_CPSW_NU_STATS_PORT_OFFSET * port_id);
 		port->name = of_get_property(port_np, "label", NULL);
@@ -1981,7 +1993,18 @@ am65_cpsw_nuss_init_port_ndev(struct am65_cpsw_common *common, u32 port_idx)
 	port->slave.phylink_config.type = PHYLINK_NETDEV;
 	port->slave.phylink_config.mac_capabilities = MAC_SYM_PAUSE | MAC_10 | MAC_100 | MAC_1000FD;
 
-	phy_interface_set_rgmii(port->slave.phylink_config.supported_interfaces);
+	if (phy_interface_mode_is_rgmii(port->slave.phy_if)) {
+		phy_interface_set_rgmii(port->slave.phylink_config.supported_interfaces);
+	} else if (port->slave.phy_if == PHY_INTERFACE_MODE_RMII) {
+		__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);
+	} else {
+		dev_err(dev, "selected phy-mode is not supported\n");
+		return -EOPNOTSUPP;
+	}
 
 	phylink = phylink_create(&port->slave.phylink_config,
 				 of_node_to_fwnode(port->slave.phy_node),
@@ -2611,10 +2634,18 @@ static const struct am65_cpsw_pdata am64x_cpswxg_pdata = {
 	.fdqring_mode = K3_RINGACC_RING_MODE_RING,
 };
 
+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),
+};
+
 static const struct of_device_id am65_cpsw_nuss_of_mtable[] = {
 	{ .compatible = "ti,am654-cpsw-nuss", .data = &am65x_sr1_0},
 	{ .compatible = "ti,j721e-cpsw-nuss", .data = &j721e_pdata},
 	{ .compatible = "ti,am642-cpsw-nuss", .data = &am64x_cpswxg_pdata},
+	{ .compatible = "ti,j7200-cpswxg-nuss", .data = &j7200_cpswxg_pdata},
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, am65_cpsw_nuss_of_mtable);

drivers/net/ethernet/ti/am65-cpsw-nuss.h

@@ -46,6 +46,7 @@ struct am65_cpsw_port {
 	const char			*name;
 	u32				port_id;
 	void __iomem			*port_base;
+	void __iomem			*sgmii_base;
 	void __iomem			*stat_base;
 	void __iomem			*fetch_ram_base;
 	bool				disabled;
@@ -88,6 +89,7 @@ struct am65_cpsw_rx_chn {
 
 struct am65_cpsw_pdata {
 	u32	quirks;
+	u64	extra_modes;
 	enum k3_ring_mode fdqring_mode;
 	const char	*ale_dev_id;
 };