linux-kernel - [PATCH 2/3] net: ethernet: ti: am65-cpsw: Add support for QSGMII mode

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Date:   Tue, 31 May 2022 17:00:57 +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+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>, <kishon@...com>,
        Siddharth Vadapalli <s-vadapalli@...com>
Subject: [PATCH 2/3] net: ethernet: ti: am65-cpsw: Add support for QSGMII mode

Enable QSGMII mode in am65-cpsw driver.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
---
 drivers/net/ethernet/ti/am65-cpsw-nuss.c | 13 ++++++++++++-
 drivers/net/ethernet/ti/am65-cpsw-nuss.h |  1 +
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index 77bdda97b2b0..462f63313fb3 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/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 +1412,13 @@ 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);
+
+	if (state->interface == PHY_INTERFACE_MODE_QSGMII)
+		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,
@@ -1846,6 +1855,7 @@ 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);
+		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);
@@ -1981,6 +1991,7 @@ am65_cpsw_nuss_init_port_ndev(struct am65_cpsw_common *common, u32 port_idx)
 	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);
+	__set_bit(PHY_INTERFACE_MODE_QSGMII, port->slave.phylink_config.supported_interfaces);
 
 	phylink = phylink_create(&port->slave.phylink_config,
 				 of_node_to_fwnode(port->slave.phy_node),
diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.h b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
index ac945631bf2f..8b6297e268ec 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.h
+++ b/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;
-- 
2.36.1