1 files changed, 146 insertions, 0 deletions
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_phylink.c b/drivers/net/ethernet/microchip/sparx5/sparx5_phylink.c
new file mode 100644
index 000000000..830da0e5f
--- /dev/null
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_phylink.c
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Microchip Sparx5 Switch driver
+ *
+ * Copyright (c) 2021 Microchip Technology Inc. and its subsidiaries.
+ */
+
+#include <linux/module.h>
+#include <linux/phylink.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+#include <linux/sfp.h>
+
+#include "sparx5_main_regs.h"
+#include "sparx5_main.h"
+#include "sparx5_port.h"
+
+static bool port_conf_has_changed(struct sparx5_port_config *a, struct sparx5_port_config *b)
+{
+	if (a->speed != b->speed ||
+	    a->portmode != b->portmode ||
+	    a->autoneg != b->autoneg ||
+	    a->pause_adv != b->pause_adv ||
+	    a->power_down != b->power_down ||
+	    a->media != b->media)
+		return true;
+	return false;
+}
+
+static struct phylink_pcs *
+sparx5_phylink_mac_select_pcs(struct phylink_config *config,
+			      phy_interface_t interface)
+{
+	struct sparx5_port *port = netdev_priv(to_net_dev(config->dev));
+
+	return &port->phylink_pcs;
+}
+
+static void sparx5_phylink_mac_config(struct phylink_config *config,
+				      unsigned int mode,
+				      const struct phylink_link_state *state)
+{
+	/* Currently not used */
+}
+
+static void sparx5_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 sparx5_port *port = netdev_priv(to_net_dev(config->dev));
+	struct sparx5_port_config conf;
+	int err;
+
+	conf = port->conf;
+	conf.duplex = duplex;
+	conf.pause = 0;
+	conf.pause |= tx_pause ? MLO_PAUSE_TX : 0;
+	conf.pause |= rx_pause ? MLO_PAUSE_RX : 0;
+	conf.speed = speed;
+	/* Configure the port to speed/duplex/pause */
+	err = sparx5_port_config(port->sparx5, port, &conf);
+	if (err)
+		netdev_err(port->ndev, "port config failed: %d\n", err);
+}
+
+static void sparx5_phylink_mac_link_down(struct phylink_config *config,
+					 unsigned int mode,
+					 phy_interface_t interface)
+{
+	/* Currently not used */
+}
+
+static struct sparx5_port *sparx5_pcs_to_port(struct phylink_pcs *pcs)
+{
+	return container_of(pcs, struct sparx5_port, phylink_pcs);
+}
+
+static void sparx5_pcs_get_state(struct phylink_pcs *pcs,
+				 struct phylink_link_state *state)
+{
+	struct sparx5_port *port = sparx5_pcs_to_port(pcs);
+	struct sparx5_port_status status;
+
+	sparx5_get_port_status(port->sparx5, port, &status);
+	state->link = status.link && !status.link_down;
+	state->an_complete = status.an_complete;
+	state->speed = status.speed;
+	state->duplex = status.duplex;
+	state->pause = status.pause;
+}
+
+static int sparx5_pcs_config(struct phylink_pcs *pcs,
+			     unsigned int mode,
+			     phy_interface_t interface,
+			     const unsigned long *advertising,
+			     bool permit_pause_to_mac)
+{
+	struct sparx5_port *port = sparx5_pcs_to_port(pcs);
+	struct sparx5_port_config conf;
+	int ret = 0;
+
+	conf = port->conf;
+	conf.power_down = false;
+	conf.portmode = interface;
+	conf.inband = phylink_autoneg_inband(mode);
+	conf.autoneg = phylink_test(advertising, Autoneg);
+	conf.pause_adv = 0;
+	if (phylink_test(advertising, Pause))
+		conf.pause_adv |= ADVERTISE_1000XPAUSE;
+	if (phylink_test(advertising, Asym_Pause))
+		conf.pause_adv |= ADVERTISE_1000XPSE_ASYM;
+	if (sparx5_is_baser(interface)) {
+		if (phylink_test(advertising, FIBRE))
+			conf.media = PHY_MEDIA_SR;
+		else
+			conf.media = PHY_MEDIA_DAC;
+	}
+	if (!port_conf_has_changed(&port->conf, &conf))
+		return ret;
+	/* Enable the PCS matching this interface type */
+	ret = sparx5_port_pcs_set(port->sparx5, port, &conf);
+	if (ret)
+		netdev_err(port->ndev, "port PCS config failed: %d\n", ret);
+	return ret;
+}
+
+static void sparx5_pcs_aneg_restart(struct phylink_pcs *pcs)
+{
+	/* Currently not used */
+}
+
+const struct phylink_pcs_ops sparx5_phylink_pcs_ops = {
+	.pcs_get_state = sparx5_pcs_get_state,
+	.pcs_config = sparx5_pcs_config,
+	.pcs_an_restart = sparx5_pcs_aneg_restart,
+};
+
+const struct phylink_mac_ops sparx5_phylink_mac_ops = {
+	.validate = phylink_generic_validate,
+	.mac_select_pcs = sparx5_phylink_mac_select_pcs,
+	.mac_config = sparx5_phylink_mac_config,
+	.mac_link_down = sparx5_phylink_mac_link_down,
+	.mac_link_up = sparx5_phylink_mac_link_up,
+};