1 files changed, 140 insertions, 0 deletions
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_phylink.c b/drivers/net/ethernet/microchip/lan966x/lan966x_phylink.c
new file mode 100644
index 000000000..e4ac59480
--- /dev/null
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_phylink.c
@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <linux/module.h>
+#include <linux/phylink.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+#include <linux/phy/phy.h>
+#include <linux/sfp.h>
+
+#include "lan966x_main.h"
+
+static struct phylink_pcs *lan966x_phylink_mac_select(struct phylink_config *config,
+						      phy_interface_t interface)
+{
+	struct lan966x_port *port = netdev_priv(to_net_dev(config->dev));
+
+	return &port->phylink_pcs;
+}
+
+static void lan966x_phylink_mac_config(struct phylink_config *config,
+				       unsigned int mode,
+				       const struct phylink_link_state *state)
+{
+}
+
+static int lan966x_phylink_mac_prepare(struct phylink_config *config,
+				       unsigned int mode,
+				       phy_interface_t iface)
+{
+	struct lan966x_port *port = netdev_priv(to_net_dev(config->dev));
+	phy_interface_t serdes_mode = iface;
+	int err;
+
+	if (port->serdes) {
+		err = phy_set_mode_ext(port->serdes, PHY_MODE_ETHERNET,
+				       serdes_mode);
+		if (err) {
+			netdev_err(to_net_dev(config->dev),
+				   "Could not set mode of SerDes\n");
+			return err;
+		}
+	}
+
+	return 0;
+}
+
+static void lan966x_phylink_mac_link_up(struct phylink_config *config,
+					struct phy_device *phy,
+					unsigned int mode,
+					phy_interface_t interface,
+					int speed, int duplex,
+					bool tx_pause, bool rx_pause)
+{
+	struct lan966x_port *port = netdev_priv(to_net_dev(config->dev));
+	struct lan966x_port_config *port_config = &port->config;
+
+	port_config->duplex = duplex;
+	port_config->speed = speed;
+	port_config->pause = 0;
+	port_config->pause |= tx_pause ? MLO_PAUSE_TX : 0;
+	port_config->pause |= rx_pause ? MLO_PAUSE_RX : 0;
+
+	if (phy_interface_mode_is_rgmii(interface))
+		phy_set_speed(port->serdes, speed);
+
+	lan966x_port_config_up(port);
+}
+
+static void lan966x_phylink_mac_link_down(struct phylink_config *config,
+					  unsigned int mode,
+					  phy_interface_t interface)
+{
+	struct lan966x_port *port = netdev_priv(to_net_dev(config->dev));
+	struct lan966x *lan966x = port->lan966x;
+
+	lan966x_port_config_down(port);
+
+	/* Take PCS out of reset */
+	lan_rmw(DEV_CLOCK_CFG_PCS_RX_RST_SET(0) |
+		DEV_CLOCK_CFG_PCS_TX_RST_SET(0),
+		DEV_CLOCK_CFG_PCS_RX_RST |
+		DEV_CLOCK_CFG_PCS_TX_RST,
+		lan966x, DEV_CLOCK_CFG(port->chip_port));
+}
+
+static struct lan966x_port *lan966x_pcs_to_port(struct phylink_pcs *pcs)
+{
+	return container_of(pcs, struct lan966x_port, phylink_pcs);
+}
+
+static void lan966x_pcs_get_state(struct phylink_pcs *pcs,
+				  struct phylink_link_state *state)
+{
+	struct lan966x_port *port = lan966x_pcs_to_port(pcs);
+
+	lan966x_port_status_get(port, state);
+}
+
+static int lan966x_pcs_config(struct phylink_pcs *pcs,
+			      unsigned int mode,
+			      phy_interface_t interface,
+			      const unsigned long *advertising,
+			      bool permit_pause_to_mac)
+{
+	struct lan966x_port *port = lan966x_pcs_to_port(pcs);
+	struct lan966x_port_config config;
+	int ret;
+
+	config = port->config;
+	config.portmode = interface;
+	config.inband = phylink_autoneg_inband(mode);
+	config.autoneg = phylink_test(advertising, Autoneg);
+	config.advertising = advertising;
+
+	ret = lan966x_port_pcs_set(port, &config);
+	if (ret)
+		netdev_err(port->dev, "port PCS config failed: %d\n", ret);
+
+	return ret;
+}
+
+static void lan966x_pcs_aneg_restart(struct phylink_pcs *pcs)
+{
+	/* Currently not used */
+}
+
+const struct phylink_mac_ops lan966x_phylink_mac_ops = {
+	.validate = phylink_generic_validate,
+	.mac_select_pcs = lan966x_phylink_mac_select,
+	.mac_config = lan966x_phylink_mac_config,
+	.mac_prepare = lan966x_phylink_mac_prepare,
+	.mac_link_down = lan966x_phylink_mac_link_down,
+	.mac_link_up = lan966x_phylink_mac_link_up,
+};
+
+const struct phylink_pcs_ops lan966x_phylink_pcs_ops = {
+	.pcs_get_state = lan966x_pcs_get_state,
+	.pcs_config = lan966x_pcs_config,
+	.pcs_an_restart = lan966x_pcs_aneg_restart,
+};