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From:   Siddharth Vadapalli <s-vadapalli@ti.com>
To:     <davem@davemloft.net>, <edumazet@google.com>, <kuba@kernel.org>,
        <linux@armlinux.org.uk>, <pabeni@redhat.com>, <rogerq@kernel.org>
CC:     <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>, <srk@ti.com>,
        <s-vadapalli@ti.com>
Subject: [PATCH net-next v2 3/3] net: ethernet: ti: am65-cpsw: Enable USXGMII mode for J784S4 CPSW9G
Date:   Mon, 3 Apr 2023 16:31:06 +0530
Message-ID: <20230403110106.983994-4-s-vadapalli@ti.com>
In-Reply-To: <20230403110106.983994-1-s-vadapalli@ti.com>
References: <20230403110106.983994-1-s-vadapalli@ti.com>
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TI's J784S4 SoC supports USXGMII mode. Add USXGMII mode to the
extra_modes member of the J784S4 SoC data.

Additionally, convert the IF statement in am65_cpsw_nuss_mac_config() to
SWITCH statement to scale for new modes. Configure MAC control register
for supporting USXGMII mode and add MAC_5000FD in the "mac_capabilities"
member of struct "phylink_config".

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
---
 drivers/net/ethernet/ti/am65-cpsw-nuss.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index 6c118a9abb2f..f4d4f987563c 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -1507,10 +1507,20 @@ static void am65_cpsw_nuss_mac_config(struct phylink_config *config, unsigned in
 	u32 mac_control = 0;
 
 	if (common->pdata.extra_modes & BIT(state->interface)) {
-		if (state->interface == PHY_INTERFACE_MODE_SGMII) {
+		switch (state->interface) {
+		case PHY_INTERFACE_MODE_SGMII:
 			mac_control |= CPSW_SL_CTL_EXT_EN;
 			writel(ADVERTISE_SGMII,
 			       port->sgmii_base + AM65_CPSW_SGMII_MR_ADV_ABILITY_REG);
+			break;
+
+		case PHY_INTERFACE_MODE_USXGMII:
+			mac_control |= CPSW_SL_CTL_XGIG | CPSW_SL_CTL_XGMII_EN;
+			break;
+
+		default:
+			/* No special configuration is required for other modes */
+			break;
 		}
 
 		if (mac_control)
@@ -2161,7 +2171,8 @@ am65_cpsw_nuss_init_port_ndev(struct am65_cpsw_common *common, u32 port_idx)
 	/* Configuring Phylink */
 	port->slave.phylink_config.dev = &port->ndev->dev;
 	port->slave.phylink_config.type = PHYLINK_NETDEV;
-	port->slave.phylink_config.mac_capabilities = MAC_SYM_PAUSE | MAC_10 | MAC_100 | MAC_1000FD;
+	port->slave.phylink_config.mac_capabilities = MAC_SYM_PAUSE | MAC_10 | MAC_100 |
+						      MAC_1000FD | MAC_5000FD;
 	port->slave.phylink_config.mac_managed_pm = true; /* MAC does PM */
 
 	switch (port->slave.phy_if) {
@@ -2179,6 +2190,7 @@ am65_cpsw_nuss_init_port_ndev(struct am65_cpsw_common *common, u32 port_idx)
 
 	case PHY_INTERFACE_MODE_QSGMII:
 	case PHY_INTERFACE_MODE_SGMII:
+	case PHY_INTERFACE_MODE_USXGMII:
 		if (common->pdata.extra_modes & BIT(port->slave.phy_if)) {
 			__set_bit(port->slave.phy_if,
 				  port->slave.phylink_config.supported_interfaces);
@@ -2804,7 +2816,7 @@ static const struct am65_cpsw_pdata j784s4_cpswxg_pdata = {
 	.quirks = 0,
 	.ale_dev_id = "am64-cpswxg",
 	.fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE,
-	.extra_modes = BIT(PHY_INTERFACE_MODE_QSGMII),
+	.extra_modes = BIT(PHY_INTERFACE_MODE_QSGMII) | BIT(PHY_INTERFACE_MODE_USXGMII),
 };
 
 static const struct of_device_id am65_cpsw_nuss_of_mtable[] = {
-- 
2.25.1